Updated version and assets for release v21.08

Merge branch 'master' into release
Updated translator attribution before release v21.08
2026-02-05 16:49:47 +03:00 · 2021-08-31 22:07:53 +01:00 · 2021-08-31 22:07:23 +01:00 · 2021-08-31 22:05:16 +01:00 · 2021-08-31 22:03:51 +01:00 · 2021-08-31 21:59:37 +01:00
1406 changed files with 94040 additions and 45413 deletions
--- a/.browserslistrc
+++ b/.browserslistrc
@@ -1,2 +0,0 @@
->0.25%
-not op_mini all
--- a/.env.example
+++ b/.env.example
@@ -1,11 +1,24 @@
-# Environment
-APP_ENV=production
-APP_DEBUG=false
+# This file, when named as ".env" in the root of your BookStack install
+# folder, is used for the core configuration of the application.
+# By default this file contains the most common required options but
+# a full list of options can be found in the '.env.example.complete' file.
+
+# NOTE: If any of your values contain a space or a hash you will need to
+# wrap the entire value in quotes. (eg. MAIL_FROM_NAME="BookStack Mailer")
+
+# Application key
+# Used for encryption where needed.
+# Run `php artisan key:generate` to generate a valid key.
 APP_KEY=SomeRandomString

-# The below url has to be set if using social auth options
-# or if you are not using BookStack at the root path of your domain.
-# APP_URL=http://bookstack.dev
+# Application URL
+# This must be the root URL that you want to host BookStack on.
+# All URLs in BookStack will be generated using this value
+# to ensure URLs generated are consistent and secure.
+# If you change this in the future you may need to run a command
+# to update stored URLs in the database. Command example:
+# php artisan bookstack:update-url https://old.example.com https://new.example.com
+APP_URL=https://example.com

 # Database details
 DB_HOST=localhost
@@ -13,76 +26,19 @@ DB_DATABASE=database_database
 DB_USERNAME=database_username
 DB_PASSWORD=database_user_password

-# Cache and session
-CACHE_DRIVER=file
-SESSION_DRIVER=file
-# If using Memcached, comment the above and uncomment these
-#CACHE_DRIVER=memcached
-#SESSION_DRIVER=memcached
-QUEUE_DRIVER=sync
-# A different prefix is useful when multiple BookStack instances use the same caching server
-CACHE_PREFIX=bookstack
-
-# Memcached settings
-# If using a UNIX socket path for the host, set the port to 0
-# This follows the following format: HOST:PORT:WEIGHT
-# For multiple servers separate with a comma
-MEMCACHED_SERVERS=127.0.0.1:11211:100
-
-# Storage
-STORAGE_TYPE=local
-# Amazon S3 Config
-STORAGE_S3_KEY=false
-STORAGE_S3_SECRET=false
-STORAGE_S3_REGION=false
-STORAGE_S3_BUCKET=false
-# Storage URL
-# Used to prefix image urls for when using custom domains/cdns
-STORAGE_URL=false
-
-# General auth
-AUTH_METHOD=standard
-
-# Social Authentication information. Defaults as off.
-GITHUB_APP_ID=false
-GITHUB_APP_SECRET=false
-GOOGLE_APP_ID=false
-GOOGLE_APP_SECRET=false
-OKTA_BASE_URL=false
-OKTA_APP_ID=false
-OKTA_APP_SECRET=false
-TWITCH_APP_ID=false
-TWITCH_APP_SECRET=false
-GITLAB_APP_ID=false
-GITLAB_APP_SECRET=false
-GITLAB_BASE_URI=false
-DISCORD_APP_ID=false
-DISCORD_APP_SECRET=false
-
-# External services such as Gravatar and Draw.IO
-DISABLE_EXTERNAL_SERVICES=false
-
-# LDAP Settings
-LDAP_SERVER=false
-LDAP_BASE_DN=false
-LDAP_DN=false
-LDAP_PASS=false
-LDAP_USER_FILTER=false
-LDAP_VERSION=false
-# Do you want to sync LDAP groups to BookStack roles for a user
-LDAP_USER_TO_GROUPS=false
-# What is the LDAP attribute for group memberships
-LDAP_GROUP_ATTRIBUTE="memberOf"
-# Would you like to remove users from roles on BookStack if they do not match on LDAP
-# If false, the ldap groups-roles sync will only add users to roles
-LDAP_REMOVE_FROM_GROUPS=false
-
-# Mail settings
+# Mail system to use
+# Can be 'smtp' or 'sendmail'
 MAIL_DRIVER=smtp
+
+# Mail sender details
+MAIL_FROM_NAME="BookStack"
+MAIL_FROM=bookstack@example.com
+
+# SMTP mail options
+# These settings can be checked using the "Send a Test Email"
+# feature found in the "Settings > Maintenance" area of the system.
 MAIL_HOST=localhost
 MAIL_PORT=1025
 MAIL_USERNAME=null
 MAIL_PASSWORD=null
-MAIL_ENCRYPTION=null
-MAIL_FROM=null
-MAIL_FROM_NAME=null
+MAIL_ENCRYPTION=null
--- a/.env.example.complete
+++ b/.env.example.complete
@@ -0,0 +1,309 @@
+# Full list of environment variables that can be used with BookStack.
+# Selectively copy these to your '.env' file as required.
+# Each option is shown with it's default value.
+# Do not copy this whole file to use as your '.env' file.
+
+# Application environment
+# Can be 'production', 'development', 'testing' or 'demo'
+APP_ENV=production
+
+# Enable debug mode
+# Shows advanced debug information and errors.
+# CAN EXPOSE OTHER VARIABLES, LEAVE DISABLED
+APP_DEBUG=false
+
+# Application key
+# Used for encryption where needed.
+# Run `php artisan key:generate` to generate a valid key.
+APP_KEY=SomeRandomString
+
+# Application URL
+# This must be the root URL that you want to host BookStack on.
+# All URL's in BookStack will be generated using this value.
+APP_URL=https://example.com
+
+# Application default language
+# The default language choice to show.
+# May be overridden by user-preference or visitor browser settings.
+APP_LANG=en
+
+# Auto-detect language for public visitors.
+# Uses browser-sent headers to infer a language.
+# APP_LANG will be used if such a header is not provided.
+APP_AUTO_LANG_PUBLIC=true
+
+# Application timezone
+# Used where dates are displayed such as on exported content.
+# Valid timezone values can be found here: https://www.php.net/manual/en/timezones.php
+APP_TIMEZONE=UTC
+
+# Application theme
+# Used to specific a themes/<APP_THEME> folder where BookStack UI
+# overrides can be made. Defaults to disabled.
+APP_THEME=false
+
+# Database details
+# Host can contain a port (localhost:3306) or a separate DB_PORT option can be used.
+DB_HOST=localhost
+DB_PORT=3306
+DB_DATABASE=database_database
+DB_USERNAME=database_username
+DB_PASSWORD=database_user_password
+
+# Mail system to use
+# Can be 'smtp' or 'sendmail'
+MAIL_DRIVER=smtp
+
+# Mail sending options
+MAIL_FROM=mail@bookstackapp.com
+MAIL_FROM_NAME=BookStack
+
+# SMTP mail options
+MAIL_HOST=localhost
+MAIL_PORT=1025
+MAIL_USERNAME=null
+MAIL_PASSWORD=null
+MAIL_ENCRYPTION=null
+
+# Cache & Session driver to use
+# Can be 'file', 'database', 'memcached' or 'redis'
+CACHE_DRIVER=file
+SESSION_DRIVER=file
+
+# Session configuration
+SESSION_LIFETIME=120
+SESSION_COOKIE_NAME=bookstack_session
+SESSION_SECURE_COOKIE=false
+
+# Cache key prefix
+# Can be used to prevent conflicts multiple BookStack instances use the same store.
+CACHE_PREFIX=bookstack
+
+# Memcached server configuration
+# If using a UNIX socket path for the host, set the port to 0
+# This follows the following format: HOST:PORT:WEIGHT
+# For multiple servers separate with a comma
+MEMCACHED_SERVERS=127.0.0.1:11211:100
+
+# Redis server configuration
+# This follows the following format: HOST:PORT:DATABASE
+# or, if using a password: HOST:PORT:DATABASE:PASSWORD
+# For multiple servers separate with a comma. These will be clustered.
+REDIS_SERVERS=127.0.0.1:6379:0
+
+# Queue driver to use
+# Queue not really currently used but may be configurable in the future.
+# Would advise not to change this for now.
+QUEUE_CONNECTION=sync
+
+# Storage system to use
+# Can be 'local', 'local_secure' or 's3'
+STORAGE_TYPE=local
+
+# Image storage system to use
+# Defaults to the value of STORAGE_TYPE if unset.
+# Accepts the same values as STORAGE_TYPE.
+STORAGE_IMAGE_TYPE=local
+
+# Attachment storage system to use
+# Defaults to the value of STORAGE_TYPE if unset.
+# Accepts the same values as STORAGE_TYPE although 'local' will be forced to 'local_secure'.
+STORAGE_ATTACHMENT_TYPE=local_secure
+
+# Amazon S3 storage configuration
+STORAGE_S3_KEY=your-s3-key
+STORAGE_S3_SECRET=your-s3-secret
+STORAGE_S3_BUCKET=s3-bucket-name
+STORAGE_S3_REGION=s3-bucket-region
+
+# S3 endpoint to use for storage calls
+# Only set this if using a non-Amazon s3-compatible service such as Minio
+STORAGE_S3_ENDPOINT=https://my-custom-s3-compatible.service.com:8001
+
+# Storage URL prefix
+# Used as a base for any generated image urls.
+# An s3-format URL will be generated if not set.
+STORAGE_URL=false
+
+# Authentication method to use
+# Can be 'standard', 'ldap' or 'saml2'
+AUTH_METHOD=standard
+
+# Social authentication configuration
+# All disabled by default.
+# Refer to https://www.bookstackapp.com/docs/admin/third-party-auth/
+
+AZURE_APP_ID=false
+AZURE_APP_SECRET=false
+AZURE_TENANT=false
+AZURE_AUTO_REGISTER=false
+AZURE_AUTO_CONFIRM_EMAIL=false
+
+DISCORD_APP_ID=false
+DISCORD_APP_SECRET=false
+DISCORD_AUTO_REGISTER=false
+DISCORD_AUTO_CONFIRM_EMAIL=false
+
+FACEBOOK_APP_ID=false
+FACEBOOK_APP_SECRET=false
+FACEBOOK_AUTO_REGISTER=false
+FACEBOOK_AUTO_CONFIRM_EMAIL=false
+
+GITHUB_APP_ID=false
+GITHUB_APP_SECRET=false
+GITHUB_AUTO_REGISTER=false
+GITHUB_AUTO_CONFIRM_EMAIL=false
+
+GITLAB_APP_ID=false
+GITLAB_APP_SECRET=false
+GITLAB_BASE_URI=false
+GITLAB_AUTO_REGISTER=false
+GITLAB_AUTO_CONFIRM_EMAIL=false
+
+GOOGLE_APP_ID=false
+GOOGLE_APP_SECRET=false
+GOOGLE_SELECT_ACCOUNT=false
+GOOGLE_AUTO_REGISTER=false
+GOOGLE_AUTO_CONFIRM_EMAIL=false
+
+OKTA_BASE_URL=false
+OKTA_APP_ID=false
+OKTA_APP_SECRET=false
+OKTA_AUTO_REGISTER=false
+OKTA_AUTO_CONFIRM_EMAIL=false
+
+SLACK_APP_ID=false
+SLACK_APP_SECRET=false
+SLACK_AUTO_REGISTER=false
+SLACK_AUTO_CONFIRM_EMAIL=false
+
+TWITCH_APP_ID=false
+TWITCH_APP_SECRET=false
+TWITCH_AUTO_REGISTER=false
+TWITCH_AUTO_CONFIRM_EMAIL=false
+
+TWITTER_APP_ID=false
+TWITTER_APP_SECRET=false
+TWITTER_AUTO_REGISTER=false
+TWITTER_AUTO_CONFIRM_EMAIL=false
+
+# LDAP authentication configuration
+# Refer to https://www.bookstackapp.com/docs/admin/ldap-auth/
+LDAP_SERVER=false
+LDAP_BASE_DN=false
+LDAP_DN=false
+LDAP_PASS=false
+LDAP_USER_FILTER=false
+LDAP_VERSION=false
+LDAP_START_TLS=false
+LDAP_TLS_INSECURE=false
+LDAP_ID_ATTRIBUTE=uid
+LDAP_EMAIL_ATTRIBUTE=mail
+LDAP_DISPLAY_NAME_ATTRIBUTE=cn
+LDAP_THUMBNAIL_ATTRIBUTE=null
+LDAP_FOLLOW_REFERRALS=true
+LDAP_DUMP_USER_DETAILS=false
+
+# LDAP group sync configuration
+# Refer to https://www.bookstackapp.com/docs/admin/ldap-auth/
+LDAP_USER_TO_GROUPS=false
+LDAP_GROUP_ATTRIBUTE="memberOf"
+LDAP_REMOVE_FROM_GROUPS=false
+
+# SAML authentication configuration
+# Refer to https://www.bookstackapp.com/docs/admin/saml2-auth/
+SAML2_NAME=SSO
+SAML2_EMAIL_ATTRIBUTE=email
+SAML2_DISPLAY_NAME_ATTRIBUTES=username
+SAML2_EXTERNAL_ID_ATTRIBUTE=null
+SAML2_IDP_ENTITYID=null
+SAML2_IDP_SSO=null
+SAML2_IDP_SLO=null
+SAML2_IDP_x509=null
+SAML2_ONELOGIN_OVERRIDES=null
+SAML2_DUMP_USER_DETAILS=false
+SAML2_AUTOLOAD_METADATA=false
+SAML2_IDP_AUTHNCONTEXT=true
+
+# SAML group sync configuration
+# Refer to https://www.bookstackapp.com/docs/admin/saml2-auth/
+SAML2_USER_TO_GROUPS=false
+SAML2_GROUP_ATTRIBUTE=group
+SAML2_REMOVE_FROM_GROUPS=false
+
+# Disable default third-party services such as Gravatar and Draw.IO
+# Service-specific options will override this option
+DISABLE_EXTERNAL_SERVICES=false
+
+# Use custom avatar service, Sets fetch URL
+# Possible placeholders: ${hash} ${size} ${email}
+# If set, Avatars will be fetched regardless of DISABLE_EXTERNAL_SERVICES option.
+# Example: AVATAR_URL=https://seccdn.libravatar.org/avatar/${hash}?s=${size}&d=identicon
+AVATAR_URL=
+
+# Enable diagrams.net integration
+# Can simply be true/false to enable/disable the integration.
+# Alternatively, It can be URL to the diagrams.net instance you want to use.
+# For URLs, The following URL parameters should be included: embed=1&proto=json&spin=1
+DRAWIO=true
+
+# Default item listing view
+# Used for public visitors and user's without a preference.
+# Can be 'list' or 'grid'.
+APP_VIEWS_BOOKS=list
+APP_VIEWS_BOOKSHELVES=grid
+APP_VIEWS_BOOKSHELF=grid
+
+# Use dark mode by default
+# Will be overriden by any user/session preference.
+APP_DEFAULT_DARK_MODE=false
+
+# Page revision limit
+# Number of page revisions to keep in the system before deleting old revisions.
+# If set to 'false' a limit will not be enforced.
+REVISION_LIMIT=50
+
+# Recycle Bin Lifetime
+# The number of days that content will remain in the recycle bin before
+# being considered for auto-removal. It is not a guarantee that content will
+# be removed after this time.
+# Set to 0 for no recycle bin functionality.
+# Set to -1 for unlimited recycle bin lifetime.
+RECYCLE_BIN_LIFETIME=30
+
+# Allow <script> tags in page content
+# Note, if set to 'true' the page editor may still escape scripts.
+ALLOW_CONTENT_SCRIPTS=false
+
+# Indicate if robots/crawlers should crawl your instance.
+# Can be 'true', 'false' or 'null'.
+# The behaviour of the default 'null' option will depend on the 'app-public' admin setting.
+# Contents of the robots.txt file can be overridden, making this option obsolete.
+ALLOW_ROBOTS=null
+
+# Allow server-side fetches to be performed to potentially unknown
+# and user-provided locations. Primarily used in exports when loading
+# in externally referenced assets.
+# Can be 'true' or 'false'.
+ALLOW_UNTRUSTED_SERVER_FETCHING=false
+
+# A list of hosts that BookStack can be iframed within.
+# Space separated if multiple. BookStack host domain is auto-inferred.
+# For Example: ALLOWED_IFRAME_HOSTS="https://example.com https://a.example.com"
+# Setting this option will also auto-adjust cookies to be SameSite=None.
+ALLOWED_IFRAME_HOSTS=null
+
+# The default and maximum item-counts for listing API requests.
+API_DEFAULT_ITEM_COUNT=100
+API_MAX_ITEM_COUNT=500
+
+# The number of API requests that can be made per minute by a single user.
+API_REQUESTS_PER_MIN=180
+
+# Enable the logging of failed email+password logins with the given message.
+# The default log channel below uses the php 'error_log' function which commonly
+# results in messages being output to the webserver error logs.
+# The message can contain a %u parameter which will be replaced with the login
+# user identifier (Username or email).
+LOG_FAILED_LOGIN_MESSAGE=false
+LOG_FAILED_LOGIN_CHANNEL=errorlog_plain_webserver
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -0,0 +1,3 @@
+# These are supported funding model platforms
+
+github: [ssddanbrown]
--- a/.github/ISSUE_TEMPLATE/api_request.md
+++ b/.github/ISSUE_TEMPLATE/api_request.md
@@ -0,0 +1,17 @@
+---
+name: New API Endpoint or Feature
+about: Request a new endpoint or API feature be added
+labels: ":nut_and_bolt: API Request"
+---
+
+#### API Endpoint or Feature
+
+Clearly describe what you'd like to have added to the API. 
+
+#### Use-Case
+
+Explain the use-case that you're working-on that requires the above request.
+
+#### Additional Context
+
+If required, add any other context about the feature request here.
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -1,5 +1,5 @@
 ---
-name: Bug report
+name: Bug Report
 about: Create a report to help us improve

 ---
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,9 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Discord chat support
+    url: https://discord.gg/ztkBqR2
+    about: Realtime support / chat with the community and the team.
+
+  - name: Debugging & Common Issues
+    url: https://www.bookstackapp.com/docs/admin/debugging/
+    about: Find details on how to debug issues and view common issues with thier resolutions.
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -1,5 +1,5 @@
 ---
-name: Feature request
+name: Feature Request
 about: Suggest an idea for this project

 ---
--- a/.github/ISSUE_TEMPLATE/language_request.md
+++ b/.github/ISSUE_TEMPLATE/language_request.md
@@ -0,0 +1,13 @@
+---
+name: Language Request
+about: Request a new language to be added to Crowdin for you to translate
+
+---
+
+### Language To Add
+
+_Specify here the language you want to add._
+
+----
+
+_This issue template is to request a new language be added to our [Crowdin translation management project](https://crowdin.com/project/bookstack). Please don't use this template to request a new language that you are not prepared to provide translations for._   
--- a/.github/translators.txt
+++ b/.github/translators.txt
@@ -0,0 +1,185 @@
+Name :: Languages
+@robertlandes :: German
+@SergioMendolia :: French
+@NakaharaL :: Portuguese, Brazilian
+@ReeseSebastian :: German
+@arietimmerman :: Dutch
+@diegoseso :: Spanish
+@S64 :: Japanese
+@JachuPL :: Polish
+@Joorem :: French
+@timoschwarzer :: German
+@sanderdw :: Dutch
+@lbguilherme :: Portuguese, Brazilian
+@marcusforsberg :: Swedish
+@artur-trzesiok :: Polish
+@Alwaysin :: French
+@msaus :: Japanese
+@moucho :: Spanish
+@vriic :: German
+@DeehSlash :: Portuguese, Brazilian
+@alex2702 :: German
+@nicobubulle :: French
+@kmoj86 :: Arabic
+@houbaron :: Chinese Traditional; Chinese Simplified
+@mullinsmikey :: Russian
+@limkukhyun :: Korean
+@CliffyPrime :: German
+@kejjang :: Chinese Traditional
+@TheLastOperator :: French
+@qianmengnet :: Simplified Chinese
+@ezzra :: German; German Informal
+@vasiliev123 :: Polish
+@Mant1kor :: Ukrainian
+@Xiphoseer :: German; German Informal
+@maantje :: Dutch
+@cima :: Czech
+@agvol :: Russian
+@Hambern :: Swedish
+@NootoNooto :: Dutch
+@kostefun :: Russian
+@lucaguindani :: French
+@miles75 :: Hungarian
+@danielroehrig-mm :: German
+@oykenfurkan :: Turkish
+@qligier :: French
+@johnroyer :: Traditional Chinese
+@artskoczylas :: Polish
+@dellamina :: Italian
+@jzoy :: Simplified Chinese
+@ististudio :: Korean
+@leomartinez :: Spanish Argentina
+@geins :: German
+@Ereza :: Catalan
+@benediktvolke :: German
+@Baptistou :: French
+@arcoai :: Spanish
+@Jokuna :: Korean
+cipi1965 :: Italian
+Mykola Ronik (Mantikor) :: Ukrainian
+furkanoyk :: Turkish
+m0uch0 :: Spanish
+Maxim Zalata (zlatin) :: Russian; Ukrainian
+nutsflag :: French
+Leonardo Mario Martinez (leonardo.m.martinez) :: Spanish, Argentina
+Rodrigo Saczuk Niz (rodrigoniz) :: Portuguese, Brazilian
+叫钦叔就好 (254351722) :: Chinese Traditional; Chinese Simplified
+aekramer :: Dutch
+JachuPL :: Polish
+milesteg :: Hungarian
+Beenbag :: German; German Informal
+Lett3rs :: Danish
+Julian (julian.henneberg) :: German; German Informal
+3GNWn :: Danish
+dbguichu :: Chinese Simplified
+Randy Kim (hyunjun) :: Korean
+Francesco M. Taurino (ftaurino) :: Italian
+DanielFrederiksen :: Danish
+Finn Wessel (19finnwessel6) :: German Informal; German
+Gustav Kånåhols (Kurbitz) :: Swedish
+Vuong Trung Hieu (fpooon) :: Vietnamese
+Emil Petersen (emoyly) :: Danish
+mrjaboozy :: Slovenian
+Statium :: Russian
+Mikkel Struntze (MStruntze) :: Danish
+kostefun :: Russian
+Tuyen.NG (tuyendev) :: Vietnamese
+Ghost_chu (dbguichu) :: Chinese Simplified
+Ziipen :: Danish
+Samuel Schwarz (Guiph7quan) :: Czech
+Aleph (toishoki) :: Turkish
+Julio Alberto García (Yllelder) :: Spanish
+Rafael (raribeir) :: Portuguese, Brazilian
+Hiroyuki Odake (dakesan) :: Japanese
+Alex Lee (qianmengnet) :: Chinese Simplified
+swinn37 :: French
+Hasan Özbey (the-turk) :: Turkish
+rcy :: Swedish
+Ali Yasir Yılmaz (ayyilmaz) :: Turkish
+scureza :: Italian
+Biepa :: German Informal; German
+syecu :: Chinese Simplified
+Lap1t0r :: French
+Thinkverse (thinkverse) :: Swedish
+alef (toishoki) :: Turkish
+Robbert Feunekes (Muukuro) :: Dutch
+seohyeon.joo :: Korean
+Orenda (OREDNA) :: Bulgarian
+Marek Pavelka (marapavelka) :: Czech
+Venkinovec :: Czech
+Tommy Ku (tommyku) :: Chinese Traditional; Japanese
+Michał Bielejewski  (bielej) :: Polish
+jozefrebjak :: Slovak
+Ikhwan Koo (Ikhwan.Koo) :: Korean
+Whay (remkovdhoef) :: Dutch
+jc7115 :: Chinese Traditional
+주서현 (seohyeon.joo) :: Korean
+ReadySystems :: Arabic
+HFinch :: German; German Informal
+brechtgijsens :: Dutch
+Lowkey (v587ygq) :: Chinese Simplified
+sdl-blue :: German Informal
+sqlik :: Polish
+Roy van Schaijk (royvanschaijk) :: Dutch
+Simsimpicpic :: French
+Zenahr Barzani (Zenahr) :: German; Japanese; Dutch; German Informal
+tatsuya.info :: Japanese
+fadiapp :: Arabic
+Jakub Bouček (jakubboucek) :: Czech
+Marco (cdrfun) :: German
+10935336 :: Chinese Simplified
+孟繁阳 (FanyangMeng) :: Chinese Simplified
+Andrej Močan (andrejm) :: Slovenian
+gilane9_ :: Arabic
+Raed alnahdi (raednahdi) :: Arabic
+Xiphoseer :: German
+MerlinSVK (merlinsvk) :: Slovak
+Kauê Sena (kaue.sena.ks) :: Portuguese, Brazilian
+MatthieuParis :: French
+Douradinho :: Portuguese, Brazilian
+Gaku Yaguchi (tama11) :: Japanese
+johnroyer :: Chinese Traditional
+jackaaa :: Chinese Traditional
+Irfan Hukama Arsyad (IrfanArsyad) :: Indonesian
+Jeff Huang (s8321414) :: Chinese Traditional
+Luís Tiago Favas (starkyller) :: Portuguese
+semirte :: Bosnian
+aarchijs :: Latvian
+Martins Pilsetnieks (pilsetnieks) :: Latvian
+Yonatan Magier (yonatanmgr) :: Hebrew
+FastHogi :: German Informal; German
+Ole Anders (Swoy) :: Norwegian Bokmal
+Atlochowski (atlochowski) :: Polish
+Simon (DefaultSimon) :: Slovenian
+Reinis Mednis (Mednis) :: Latvian
+toisho (toishoki) :: Turkish
+nikservik :: Ukrainian; Russian; Polish
+HenrijsS :: Latvian
+Pascal R-B (pborgner) :: German
+Boris (Ginfred) :: Russian
+Jonas Anker Rasmussen (jonasanker) :: Danish
+Gerwin de Keijzer (gdekeijzer) :: Dutch; German; German Informal
+kometchtech :: Japanese
+Auri (Atalonica) :: Catalan
+Francesco Franchina (ffranchina) :: Italian
+Aimrane Kds (aimrane.kds) :: Arabic
+whenwesober :: Indonesian
+Rem (remkovdhoef) :: Dutch
+syn7ax69 :: Bulgarian; Turkish
+Blaade :: French
+Behzad HosseinPoor (behzad.hp) :: Persian
+Ole Aldric (Swoy) :: Norwegian Bokmal
+fharis arabia (raednahdi) :: Arabic
+Alexander Predl (Harveyhase68) :: German
+Rem (Rem9000) :: Dutch
+Michał Stelmach (stelmach-web) :: Polish
+arniom :: French
+REMOVED_USER :: Turkish
+林祖年 (contagion) :: Chinese Traditional
+Siamak Guodarzi (siamakgoudarzi88) :: Persian
+Lis Maestrelo (lismtrl) :: Portuguese, Brazilian
+Nathanaël (nathanaelhoun) :: French
+A Ibnu Hibban (abd.ibnuhibban) :: Indonesian
+Frost-ZX :: Chinese Simplified
+Kuzma Simonov (ovmach) :: Russian
+Vojtěch Krystek (acantophis) :: Czech
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -0,0 +1,57 @@
+name: phpunit
+
+on:
+  push:
+    branches-ignore:
+      - l10n_master
+  pull_request:
+    branches-ignore:
+      - l10n_master
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        php: ['7.3', '7.4', '8.0']
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@b7d1d9c9a92d8d8463ce36d7f60da34d461724f8
+      with:
+        php-version: ${{ matrix.php }}
+        extensions: gd, mbstring, json, curl, xml, mysql, ldap
+
+    - name: Get Composer Cache Directory
+      id: composer-cache
+      run: |
+        echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+    - name: Cache composer packages
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.composer-cache.outputs.dir }}
+        key: ${{ runner.os }}-composer-${{ matrix.php }}
+
+    - name: Start Database
+      run: |
+        sudo /etc/init.d/mysql start
+
+    - name: Setup Database
+      run: |
+        mysql -uroot -proot -e 'CREATE DATABASE IF NOT EXISTS `bookstack-test`;'
+        mysql -uroot -proot -e "CREATE USER 'bookstack-test'@'localhost' IDENTIFIED WITH mysql_native_password BY 'bookstack-test';"
+        mysql -uroot -proot -e "GRANT ALL ON \`bookstack-test\`.* TO 'bookstack-test'@'localhost';"
+        mysql -uroot -proot -e 'FLUSH PRIVILEGES;'
+
+    - name: Install composer dependencies & Test
+      run: composer install --prefer-dist --no-interaction --ansi
+
+    - name: Migrate and seed the database
+      run: |
+        php${{ matrix.php }} artisan migrate --force -n --database=mysql_testing
+        php${{ matrix.php }} artisan db:seed --force -n --class=DummyContentSeeder --database=mysql_testing
+
+    - name: phpunit
+      run: php${{ matrix.php }} ./vendor/bin/phpunit
--- a/.github/workflows/test-migrations.yml
+++ b/.github/workflows/test-migrations.yml
@@ -0,0 +1,61 @@
+name: test-migrations
+
+on:
+  push:
+    branches-ignore:
+      - l10n_master
+  pull_request:
+    branches-ignore:
+      - l10n_master
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        php: ['7.3', '7.4', '8.0']
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@b7d1d9c9a92d8d8463ce36d7f60da34d461724f8
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: gd, mbstring, json, curl, xml, mysql, ldap
+
+      - name: Get Composer Cache Directory
+        id: composer-cache
+        run: |
+          echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache composer packages
+        uses: actions/cache@v1
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ matrix.php }}
+
+      - name: Start MySQL
+        run: |
+          sudo /etc/init.d/mysql start
+
+      - name: Create database & user
+        run: |
+          mysql -uroot -proot -e 'CREATE DATABASE IF NOT EXISTS `bookstack-test`;'
+          mysql -uroot -proot -e "CREATE USER 'bookstack-test'@'localhost' IDENTIFIED WITH mysql_native_password BY 'bookstack-test';"
+          mysql -uroot -proot -e "GRANT ALL ON \`bookstack-test\`.* TO 'bookstack-test'@'localhost';"
+          mysql -uroot -proot -e 'FLUSH PRIVILEGES;'
+
+      - name: Install composer dependencies
+        run: composer install --prefer-dist --no-interaction --ansi
+
+      - name: Start migration test
+        run: |
+          php${{ matrix.php }} artisan migrate --force -n --database=mysql_testing
+
+      - name: Start migration:rollback test
+        run: |
+          php${{ matrix.php }} artisan migrate:rollback --force -n --database=mysql_testing
+
+      - name: Start migration rerun test
+        run: |
+          php${{ matrix.php }} artisan migrate --force -n --database=mysql_testing
--- a/.gitignore
+++ b/.gitignore
@@ -21,4 +21,6 @@ nbproject
 .buildpath
 .project
 .settings/
-webpack-stats.json
+webpack-stats.json
+.phpunit.result.cache
+.DS_Store
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,28 +0,0 @@
-dist: trusty
-sudo: false
-language: php
-php:
-  - 7.0.20
-  - 7.1.9
-
-cache:
-  directories:
-    - $HOME/.composer/cache
-
-before_script:
-  - mysql -u root -e 'create database `bookstack-test`;'
-  - mysql -u root -e "CREATE USER 'bookstack-test'@'localhost' IDENTIFIED BY 'bookstack-test';"
-  - mysql -u root -e "GRANT ALL ON \`bookstack-test\`.* TO 'bookstack-test'@'localhost';"
-  - mysql -u root -e "FLUSH PRIVILEGES;"
-  - phpenv config-rm xdebug.ini
-  - composer install --prefer-dist --no-interaction
-  - php artisan clear-compiled -n
-  - php artisan optimize -n
-  - php artisan migrate --force -n --database=mysql_testing
-  - php artisan db:seed --force -n --class=DummyContentSeeder --database=mysql_testing
-
-after_failure:
-  - cat storage/logs/laravel.log
-
-script:
-  - phpunit
--- a/2
+++ b/2
@@ -1,6 +1,6 @@
 The MIT License (MIT)

-Copyright (c) 2018 Dan Brown and the BookStack Project contributors
+Copyright (c) 2020 Dan Brown and the BookStack Project contributors
 https://github.com/BookStackApp/BookStack/graphs/contributors

 Permission is hereby granted, free of charge, to any person obtaining a copy
--- a/app/Actions/Activity.php
+++ b/app/Actions/Activity.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Auth\User;
+use BookStack\Entities\Models\Entity;
+use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+use Illuminate\Support\Str;
+
+/**
+ * @property string $type
+ * @property User   $user
+ * @property Entity $entity
+ * @property string $detail
+ * @property string $entity_type
+ * @property int    $entity_id
+ * @property int    $user_id
+ */
+class Activity extends Model
+{
+    /**
+     * Get the entity for this activity.
+     */
+    public function entity(): MorphTo
+    {
+        if ($this->entity_type === '') {
+            $this->entity_type = null;
+        }
+
+        return $this->morphTo('entity');
+    }
+
+    /**
+     * Get the user this activity relates to.
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    /**
+     * Returns text from the language files, Looks up by using the activity key.
+     */
+    public function getText(): string
+    {
+        return trans('activities.' . $this->type);
+    }
+
+    /**
+     * Check if this activity is intended to be for an entity.
+     */
+    public function isForEntity(): bool
+    {
+        return Str::startsWith($this->type, [
+            'page_', 'chapter_', 'book_', 'bookshelf_',
+        ]);
+    }
+
+    /**
+     * Checks if another Activity matches the general information of another.
+     */
+    public function isSimilarTo(Activity $activityB): bool
+    {
+        return [$this->type, $this->entity_type, $this->entity_id] === [$activityB->type, $activityB->entity_type, $activityB->entity_id];
+    }
+}
--- a/app/Actions/ActivityService.php
+++ b/app/Actions/ActivityService.php
@@ -0,0 +1,197 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Auth\Permissions\PermissionService;
+use BookStack\Auth\User;
+use BookStack\Entities\Models\Chapter;
+use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\Page;
+use BookStack\Interfaces\Loggable;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\Relation;
+use Illuminate\Support\Facades\Log;
+
+class ActivityService
+{
+    protected $activity;
+    protected $permissionService;
+
+    public function __construct(Activity $activity, PermissionService $permissionService)
+    {
+        $this->activity = $activity;
+        $this->permissionService = $permissionService;
+    }
+
+    /**
+     * Add activity data to database for an entity.
+     */
+    public function addForEntity(Entity $entity, string $type)
+    {
+        $activity = $this->newActivityForUser($type);
+        $entity->activity()->save($activity);
+        $this->setNotification($type);
+    }
+
+    /**
+     * Add a generic activity event to the database.
+     *
+     * @param string|Loggable $detail
+     */
+    public function add(string $type, $detail = '')
+    {
+        if ($detail instanceof Loggable) {
+            $detail = $detail->logDescriptor();
+        }
+
+        $activity = $this->newActivityForUser($type);
+        $activity->detail = $detail;
+        $activity->save();
+        $this->setNotification($type);
+    }
+
+    /**
+     * Get a new activity instance for the current user.
+     */
+    protected function newActivityForUser(string $type): Activity
+    {
+        return $this->activity->newInstance()->forceFill([
+            'type'     => strtolower($type),
+            'user_id'  => user()->id,
+        ]);
+    }
+
+    /**
+     * Removes the entity attachment from each of its activities
+     * and instead uses the 'extra' field with the entities name.
+     * Used when an entity is deleted.
+     */
+    public function removeEntity(Entity $entity)
+    {
+        $entity->activity()->update([
+            'detail'       => $entity->name,
+            'entity_id'    => null,
+            'entity_type'  => null,
+        ]);
+    }
+
+    /**
+     * Gets the latest activity.
+     */
+    public function latest(int $count = 20, int $page = 0): array
+    {
+        $activityList = $this->permissionService
+            ->filterRestrictedEntityRelations($this->activity->newQuery(), 'activities', 'entity_id', 'entity_type')
+            ->orderBy('created_at', 'desc')
+            ->with(['user', 'entity'])
+            ->skip($count * $page)
+            ->take($count)
+            ->get();
+
+        return $this->filterSimilar($activityList);
+    }
+
+    /**
+     * Gets the latest activity for an entity, Filtering out similar
+     * items to prevent a message activity list.
+     */
+    public function entityActivity(Entity $entity, int $count = 20, int $page = 1): array
+    {
+        /** @var [string => int[]] $queryIds */
+        $queryIds = [$entity->getMorphClass() => [$entity->id]];
+
+        if ($entity->isA('book')) {
+            $queryIds[(new Chapter())->getMorphClass()] = $entity->chapters()->visible()->pluck('id');
+        }
+        if ($entity->isA('book') || $entity->isA('chapter')) {
+            $queryIds[(new Page())->getMorphClass()] = $entity->pages()->visible()->pluck('id');
+        }
+
+        $query = $this->activity->newQuery();
+        $query->where(function (Builder $query) use ($queryIds) {
+            foreach ($queryIds as $morphClass => $idArr) {
+                $query->orWhere(function (Builder $innerQuery) use ($morphClass, $idArr) {
+                    $innerQuery->where('entity_type', '=', $morphClass)
+                        ->whereIn('entity_id', $idArr);
+                });
+            }
+        });
+
+        $activity = $query->orderBy('created_at', 'desc')
+            ->with(['entity' => function (Relation $query) {
+                $query->withTrashed();
+            }, 'user.avatar'])
+            ->skip($count * ($page - 1))
+            ->take($count)
+            ->get();
+
+        return $this->filterSimilar($activity);
+    }
+
+    /**
+     * Get latest activity for a user, Filtering out similar items.
+     */
+    public function userActivity(User $user, int $count = 20, int $page = 0): array
+    {
+        $activityList = $this->permissionService
+            ->filterRestrictedEntityRelations($this->activity->newQuery(), 'activities', 'entity_id', 'entity_type')
+            ->orderBy('created_at', 'desc')
+            ->where('user_id', '=', $user->id)
+            ->skip($count * $page)
+            ->take($count)
+            ->get();
+
+        return $this->filterSimilar($activityList);
+    }
+
+    /**
+     * Filters out similar activity.
+     *
+     * @param Activity[] $activities
+     *
+     * @return array
+     */
+    protected function filterSimilar(iterable $activities): array
+    {
+        $newActivity = [];
+        $previousItem = null;
+
+        foreach ($activities as $activityItem) {
+            if (!$previousItem || !$activityItem->isSimilarTo($previousItem)) {
+                $newActivity[] = $activityItem;
+            }
+
+            $previousItem = $activityItem;
+        }
+
+        return $newActivity;
+    }
+
+    /**
+     * Flashes a notification message to the session if an appropriate message is available.
+     */
+    protected function setNotification(string $type)
+    {
+        $notificationTextKey = 'activities.' . $type . '_notification';
+        if (trans()->has($notificationTextKey)) {
+            $message = trans($notificationTextKey);
+            session()->flash('success', $message);
+        }
+    }
+
+    /**
+     * Log out a failed login attempt, Providing the given username
+     * as part of the message if the '%u' string is used.
+     */
+    public function logFailedLogin(string $username)
+    {
+        $message = config('logging.failed_login.message');
+        if (!$message) {
+            return;
+        }
+
+        $message = str_replace('%u', $username, $message);
+        $channel = config('logging.failed_login.channel');
+        Log::channel($channel)->warning($message);
+    }
+}
--- a/app/Actions/ActivityType.php
+++ b/app/Actions/ActivityType.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace BookStack\Actions;
+
+class ActivityType
+{
+    const PAGE_CREATE = 'page_create';
+    const PAGE_UPDATE = 'page_update';
+    const PAGE_DELETE = 'page_delete';
+    const PAGE_RESTORE = 'page_restore';
+    const PAGE_MOVE = 'page_move';
+
+    const CHAPTER_CREATE = 'chapter_create';
+    const CHAPTER_UPDATE = 'chapter_update';
+    const CHAPTER_DELETE = 'chapter_delete';
+    const CHAPTER_MOVE = 'chapter_move';
+
+    const BOOK_CREATE = 'book_create';
+    const BOOK_UPDATE = 'book_update';
+    const BOOK_DELETE = 'book_delete';
+    const BOOK_SORT = 'book_sort';
+
+    const BOOKSHELF_CREATE = 'bookshelf_create';
+    const BOOKSHELF_UPDATE = 'bookshelf_update';
+    const BOOKSHELF_DELETE = 'bookshelf_delete';
+
+    const COMMENTED_ON = 'commented_on';
+    const PERMISSIONS_UPDATE = 'permissions_update';
+
+    const SETTINGS_UPDATE = 'settings_update';
+    const MAINTENANCE_ACTION_RUN = 'maintenance_action_run';
+
+    const RECYCLE_BIN_EMPTY = 'recycle_bin_empty';
+    const RECYCLE_BIN_RESTORE = 'recycle_bin_restore';
+    const RECYCLE_BIN_DESTROY = 'recycle_bin_destroy';
+
+    const USER_CREATE = 'user_create';
+    const USER_UPDATE = 'user_update';
+    const USER_DELETE = 'user_delete';
+
+    const API_TOKEN_CREATE = 'api_token_create';
+    const API_TOKEN_UPDATE = 'api_token_update';
+    const API_TOKEN_DELETE = 'api_token_delete';
+
+    const ROLE_CREATE = 'role_create';
+    const ROLE_UPDATE = 'role_update';
+    const ROLE_DELETE = 'role_delete';
+
+    const AUTH_PASSWORD_RESET = 'auth_password_reset_request';
+    const AUTH_PASSWORD_RESET_UPDATE = 'auth_password_reset_update';
+    const AUTH_LOGIN = 'auth_login';
+    const AUTH_REGISTER = 'auth_register';
+
+    const MFA_SETUP_METHOD = 'mfa_setup_method';
+    const MFA_REMOVE_METHOD = 'mfa_remove_method';
+}
--- a/app/Actions/Comment.php
+++ b/app/Actions/Comment.php
@@ -1,30 +1,43 @@
-<?php namespace BookStack;
+<?php

-class Comment extends Ownable
+namespace BookStack\Actions;
+
+use BookStack\Model;
+use BookStack\Traits\HasCreatorAndUpdater;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+
+/**
+ * @property string text
+ * @property string html
+ * @property int|null parent_id
+ * @property int local_id
+ */
+class Comment extends Model
 {
-    protected $fillable = ['text', 'html', 'parent_id'];
+    use HasCreatorAndUpdater;
+
+    protected $fillable = ['text', 'parent_id'];
    protected $appends = ['created', 'updated'];

    /**
-     * Get the entity that this comment belongs to
-     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
+     * Get the entity that this comment belongs to.
     */
-    public function entity()
+    public function entity(): MorphTo
    {
        return $this->morphTo('entity');
    }

    /**
     * Check if a comment has been updated since creation.
-     * @return bool
     */
-    public function isUpdated()
+    public function isUpdated(): bool
    {
        return $this->updated_at->timestamp > $this->created_at->timestamp;
    }

    /**
     * Get created date as a relative diff.
+     *
     * @return mixed
     */
    public function getCreatedAttribute()
@@ -34,6 +47,7 @@ class Comment extends Ownable

    /**
     * Get updated date as a relative diff.
+     *
     * @return mixed
     */
    public function getUpdatedAttribute()
--- a/app/Actions/CommentRepo.php
+++ b/app/Actions/CommentRepo.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Entities\Models\Entity;
+use BookStack\Facades\Activity as ActivityService;
+use League\CommonMark\CommonMarkConverter;
+
+/**
+ * Class CommentRepo.
+ */
+class CommentRepo
+{
+    /**
+     * @var Comment
+     */
+    protected $comment;
+
+    public function __construct(Comment $comment)
+    {
+        $this->comment = $comment;
+    }
+
+    /**
+     * Get a comment by ID.
+     */
+    public function getById(int $id): Comment
+    {
+        return $this->comment->newQuery()->findOrFail($id);
+    }
+
+    /**
+     * Create a new comment on an entity.
+     */
+    public function create(Entity $entity, string $text, ?int $parent_id): Comment
+    {
+        $userId = user()->id;
+        $comment = $this->comment->newInstance();
+
+        $comment->text = $text;
+        $comment->html = $this->commentToHtml($text);
+        $comment->created_by = $userId;
+        $comment->updated_by = $userId;
+        $comment->local_id = $this->getNextLocalId($entity);
+        $comment->parent_id = $parent_id;
+
+        $entity->comments()->save($comment);
+        ActivityService::addForEntity($entity, ActivityType::COMMENTED_ON);
+
+        return $comment;
+    }
+
+    /**
+     * Update an existing comment.
+     */
+    public function update(Comment $comment, string $text): Comment
+    {
+        $comment->updated_by = user()->id;
+        $comment->text = $text;
+        $comment->html = $this->commentToHtml($text);
+        $comment->save();
+
+        return $comment;
+    }
+
+    /**
+     * Delete a comment from the system.
+     */
+    public function delete(Comment $comment)
+    {
+        $comment->delete();
+    }
+
+    /**
+     * Convert the given comment markdown text to HTML.
+     */
+    public function commentToHtml(string $commentText): string
+    {
+        $converter = new CommonMarkConverter([
+            'html_input'         => 'strip',
+            'max_nesting_level'  => 10,
+            'allow_unsafe_links' => false,
+        ]);
+
+        return $converter->convertToHtml($commentText);
+    }
+
+    /**
+     * Get the next local ID relative to the linked entity.
+     */
+    protected function getNextLocalId(Entity $entity): int
+    {
+        $comments = $entity->comments(false)->orderBy('local_id', 'desc')->first();
+
+        return ($comments->local_id ?? 0) + 1;
+    }
+}
--- a/app/Actions/Favourite.php
+++ b/app/Actions/Favourite.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+
+class Favourite extends Model
+{
+    protected $fillable = ['user_id'];
+
+    /**
+     * Get the related model that can be favourited.
+     */
+    public function favouritable(): MorphTo
+    {
+        return $this->morphTo();
+    }
+}
--- a/app/Actions/Tag.php
+++ b/app/Actions/Tag.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+
+class Tag extends Model
+{
+    protected $fillable = ['name', 'value', 'order'];
+    protected $hidden = ['id', 'entity_id', 'entity_type', 'created_at', 'updated_at'];
+
+    /**
+     * Get the entity that this tag belongs to.
+     */
+    public function entity(): MorphTo
+    {
+        return $this->morphTo('entity');
+    }
+
+    /**
+     * Get a full URL to start a tag name search for this tag name.
+     */
+    public function nameUrl(): string
+    {
+        return url('/search?term=%5B' . urlencode($this->name) . '%5D');
+    }
+
+    /**
+     * Get a full URL to start a tag name and value search for this tag's values.
+     */
+    public function valueUrl(): string
+    {
+        return url('/search?term=%5B' . urlencode($this->name) . '%3D' . urlencode($this->value) . '%5D');
+    }
+}
--- a/app/Actions/TagRepo.php
+++ b/app/Actions/TagRepo.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Auth\Permissions\PermissionService;
+use BookStack\Entities\Models\Entity;
+use DB;
+use Illuminate\Support\Collection;
+
+class TagRepo
+{
+    protected $tag;
+    protected $permissionService;
+
+    /**
+     * TagRepo constructor.
+     */
+    public function __construct(Tag $tag, PermissionService $ps)
+    {
+        $this->tag = $tag;
+        $this->permissionService = $ps;
+    }
+
+    /**
+     * Get tag name suggestions from scanning existing tag names.
+     * If no search term is given the 50 most popular tag names are provided.
+     */
+    public function getNameSuggestions(?string $searchTerm): Collection
+    {
+        $query = $this->tag->newQuery()
+            ->select('*', DB::raw('count(*) as count'))
+            ->groupBy('name');
+
+        if ($searchTerm) {
+            $query = $query->where('name', 'LIKE', $searchTerm . '%')->orderBy('name', 'desc');
+        } else {
+            $query = $query->orderBy('count', 'desc')->take(50);
+        }
+
+        $query = $this->permissionService->filterRestrictedEntityRelations($query, 'tags', 'entity_id', 'entity_type');
+
+        return $query->get(['name'])->pluck('name');
+    }
+
+    /**
+     * Get tag value suggestions from scanning existing tag values.
+     * If no search is given the 50 most popular values are provided.
+     * Passing a tagName will only find values for a tags with a particular name.
+     */
+    public function getValueSuggestions(?string $searchTerm, ?string $tagName): Collection
+    {
+        $query = $this->tag->newQuery()
+            ->select('*', DB::raw('count(*) as count'))
+            ->groupBy('value');
+
+        if ($searchTerm) {
+            $query = $query->where('value', 'LIKE', $searchTerm . '%')->orderBy('value', 'desc');
+        } else {
+            $query = $query->orderBy('count', 'desc')->take(50);
+        }
+
+        if ($tagName) {
+            $query = $query->where('name', '=', $tagName);
+        }
+
+        $query = $this->permissionService->filterRestrictedEntityRelations($query, 'tags', 'entity_id', 'entity_type');
+
+        return $query->get(['value'])->pluck('value');
+    }
+
+    /**
+     * Save an array of tags to an entity.
+     */
+    public function saveTagsToEntity(Entity $entity, array $tags = []): iterable
+    {
+        $entity->tags()->delete();
+
+        $newTags = collect($tags)->filter(function ($tag) {
+            return boolval(trim($tag['name']));
+        })->map(function ($tag) {
+            return $this->newInstanceFromInput($tag);
+        })->all();
+
+        return $entity->tags()->saveMany($newTags);
+    }
+
+    /**
+     * Create a new Tag instance from user input.
+     * Input must be an array with a 'name' and an optional 'value' key.
+     */
+    protected function newInstanceFromInput(array $input): Tag
+    {
+        $name = trim($input['name']);
+        $value = isset($input['value']) ? trim($input['value']) : '';
+
+        return $this->tag->newInstance(['name' => $name, 'value' => $value]);
+    }
+}
--- a/app/Actions/View.php
+++ b/app/Actions/View.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace BookStack\Actions;
+
+use BookStack\Interfaces\Viewable;
+use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+
+/**
+ * Class View
+ * Views are stored per-item per-person within the database.
+ * They can be used to find popular items or recently viewed items
+ * at a per-person level. They do not record every view instance as an
+ * activity. Only the latest and original view times could be recognised.
+ *
+ * @property int $views
+ * @property int $user_id
+ */
+class View extends Model
+{
+    protected $fillable = ['user_id', 'views'];
+
+    /**
+     * Get all owning viewable models.
+     */
+    public function viewable(): MorphTo
+    {
+        return $this->morphTo();
+    }
+
+    /**
+     * Increment the current user's view count for the given viewable model.
+     */
+    public static function incrementFor(Viewable $viewable): int
+    {
+        $user = user();
+        if (is_null($user) || $user->isDefault()) {
+            return 0;
+        }
+
+        /** @var View $view */
+        $view = $viewable->views()->firstOrNew([
+            'user_id' => $user->id,
+        ], ['views' => 0]);
+
+        $view->forceFill(['views' => $view->views + 1])->save();
+
+        return $view->views;
+    }
+
+    /**
+     * Clear all views from the system.
+     */
+    public static function clearAll()
+    {
+        static::query()->truncate();
+    }
+}
--- a/app/Activity.php
+++ b/app/Activity.php
@@ -1,52 +0,0 @@
-<?php
-
-namespace BookStack;
-
-/**
- * @property string  key
- * @property \User   user
- * @property \Entity entity
- * @property string  extra
- */
-class Activity extends Model
-{
-
-    /**
-     * Get the entity for this activity.
-     */
-    public function entity()
-    {
-        if ($this->entity_type === '') {
-            $this->entity_type = null;
-        }
-        return $this->morphTo('entity');
-    }
-
-    /**
-     * Get the user this activity relates to.
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function user()
-    {
-        return $this->belongsTo(User::class);
-    }
-
-    /**
-     * Returns text from the language files, Looks up by using the
-     * activity key.
-     */
-    public function getText()
-    {
-        return trans('activities.' . $this->key);
-    }
-
-    /**
-     * Checks if another Activity matches the general information of another.
-     * @param $activityB
-     * @return bool
-     */
-    public function isSimilarTo($activityB)
-    {
-        return [$this->key, $this->entity_type, $this->entity_id] === [$activityB->key, $activityB->entity_type, $activityB->entity_id];
-    }
-}
--- a/app/Api/ApiDocsGenerator.php
+++ b/app/Api/ApiDocsGenerator.php
@@ -0,0 +1,155 @@
+<?php
+
+namespace BookStack\Api;
+
+use BookStack\Http\Controllers\Api\ApiController;
+use Illuminate\Contracts\Container\BindingResolutionException;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Route;
+use Illuminate\Support\Str;
+use ReflectionClass;
+use ReflectionException;
+use ReflectionMethod;
+
+class ApiDocsGenerator
+{
+    protected $reflectionClasses = [];
+    protected $controllerClasses = [];
+
+    /**
+     * Load the docs form the cache if existing
+     * otherwise generate and store in the cache.
+     */
+    public static function generateConsideringCache(): Collection
+    {
+        $appVersion = trim(file_get_contents(base_path('version')));
+        $cacheKey = 'api-docs::' . $appVersion;
+        if (Cache::has($cacheKey) && config('app.env') === 'production') {
+            $docs = Cache::get($cacheKey);
+        } else {
+            $docs = (new static())->generate();
+            Cache::put($cacheKey, $docs, 60 * 24);
+        }
+
+        return $docs;
+    }
+
+    /**
+     * Generate API documentation.
+     */
+    protected function generate(): Collection
+    {
+        $apiRoutes = $this->getFlatApiRoutes();
+        $apiRoutes = $this->loadDetailsFromControllers($apiRoutes);
+        $apiRoutes = $this->loadDetailsFromFiles($apiRoutes);
+        $apiRoutes = $apiRoutes->groupBy('base_model');
+
+        return $apiRoutes;
+    }
+
+    /**
+     * Load any API details stored in static files.
+     */
+    protected function loadDetailsFromFiles(Collection $routes): Collection
+    {
+        return $routes->map(function (array $route) {
+            $exampleTypes = ['request', 'response'];
+            foreach ($exampleTypes as $exampleType) {
+                $exampleFile = base_path("dev/api/{$exampleType}s/{$route['name']}.json");
+                $exampleContent = file_exists($exampleFile) ? file_get_contents($exampleFile) : null;
+                $route["example_{$exampleType}"] = $exampleContent;
+            }
+
+            return $route;
+        });
+    }
+
+    /**
+     * Load any details we can fetch from the controller and its methods.
+     */
+    protected function loadDetailsFromControllers(Collection $routes): Collection
+    {
+        return $routes->map(function (array $route) {
+            $method = $this->getReflectionMethod($route['controller'], $route['controller_method']);
+            $comment = $method->getDocComment();
+            $route['description'] = $comment ? $this->parseDescriptionFromMethodComment($comment) : null;
+            $route['body_params'] = $this->getBodyParamsFromClass($route['controller'], $route['controller_method']);
+
+            return $route;
+        });
+    }
+
+    /**
+     * Load body params and their rules by inspecting the given class and method name.
+     *
+     * @throws BindingResolutionException
+     */
+    protected function getBodyParamsFromClass(string $className, string $methodName): ?array
+    {
+        /** @var ApiController $class */
+        $class = $this->controllerClasses[$className] ?? null;
+        if ($class === null) {
+            $class = app()->make($className);
+            $this->controllerClasses[$className] = $class;
+        }
+
+        $rules = $class->getValdationRules()[$methodName] ?? [];
+        foreach ($rules as $param => $ruleString) {
+            $rules[$param] = explode('|', $ruleString);
+        }
+
+        return count($rules) > 0 ? $rules : null;
+    }
+
+    /**
+     * Parse out the description text from a class method comment.
+     */
+    protected function parseDescriptionFromMethodComment(string $comment)
+    {
+        $matches = [];
+        preg_match_all('/^\s*?\*\s((?![@\s]).*?)$/m', $comment, $matches);
+
+        return implode(' ', $matches[1] ?? []);
+    }
+
+    /**
+     * Get a reflection method from the given class name and method name.
+     *
+     * @throws ReflectionException
+     */
+    protected function getReflectionMethod(string $className, string $methodName): ReflectionMethod
+    {
+        $class = $this->reflectionClasses[$className] ?? null;
+        if ($class === null) {
+            $class = new ReflectionClass($className);
+            $this->reflectionClasses[$className] = $class;
+        }
+
+        return $class->getMethod($methodName);
+    }
+
+    /**
+     * Get the system API routes, formatted into a flat collection.
+     */
+    protected function getFlatApiRoutes(): Collection
+    {
+        return collect(Route::getRoutes()->getRoutes())->filter(function ($route) {
+            return strpos($route->uri, 'api/') === 0;
+        })->map(function ($route) {
+            [$controller, $controllerMethod] = explode('@', $route->action['uses']);
+            $baseModelName = explode('.', explode('/', $route->uri)[1])[0];
+            $shortName = $baseModelName . '-' . $controllerMethod;
+
+            return [
+                'name'                    => $shortName,
+                'uri'                     => $route->uri,
+                'method'                  => $route->methods[0],
+                'controller'              => $controller,
+                'controller_method'       => $controllerMethod,
+                'controller_method_kebab' => Str::kebab($controllerMethod),
+                'base_model'              => $baseModelName,
+            ];
+        });
+    }
+}
--- a/app/Api/ApiToken.php
+++ b/app/Api/ApiToken.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace BookStack\Api;
+
+use BookStack\Auth\User;
+use BookStack\Interfaces\Loggable;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Carbon;
+
+/**
+ * Class ApiToken.
+ *
+ * @property int    $id
+ * @property string $token_id
+ * @property string $secret
+ * @property string $name
+ * @property Carbon $expires_at
+ * @property User   $user
+ */
+class ApiToken extends Model implements Loggable
+{
+    protected $fillable = ['name', 'expires_at'];
+    protected $casts = [
+        'expires_at' => 'date:Y-m-d',
+    ];
+
+    /**
+     * Get the user that this token belongs to.
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    /**
+     * Get the default expiry value for an API token.
+     * Set to 100 years from now.
+     */
+    public static function defaultExpiry(): string
+    {
+        return Carbon::now()->addYears(100)->format('Y-m-d');
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function logDescriptor(): string
+    {
+        return "({$this->id}) {$this->name}; User: {$this->user->logDescriptor()}";
+    }
+}
--- a/app/Api/ApiTokenGuard.php
+++ b/app/Api/ApiTokenGuard.php
@@ -0,0 +1,181 @@
+<?php
+
+namespace BookStack\Api;
+
+use BookStack\Auth\Access\LoginService;
+use BookStack\Exceptions\ApiAuthException;
+use Illuminate\Auth\GuardHelpers;
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Contracts\Auth\Guard;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Hash;
+use Symfony\Component\HttpFoundation\Request;
+
+class ApiTokenGuard implements Guard
+{
+    use GuardHelpers;
+
+    /**
+     * The request instance.
+     */
+    protected $request;
+
+    /**
+     * @var LoginService
+     */
+    protected $loginService;
+
+    /**
+     * The last auth exception thrown in this request.
+     *
+     * @var ApiAuthException
+     */
+    protected $lastAuthException;
+
+    /**
+     * ApiTokenGuard constructor.
+     */
+    public function __construct(Request $request, LoginService $loginService)
+    {
+        $this->request = $request;
+        $this->loginService = $loginService;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function user()
+    {
+        // Return the user if we've already retrieved them.
+        // Effectively a request-instance cache for this method.
+        if (!is_null($this->user)) {
+            return $this->user;
+        }
+
+        $user = null;
+
+        try {
+            $user = $this->getAuthorisedUserFromRequest();
+        } catch (ApiAuthException $exception) {
+            $this->lastAuthException = $exception;
+        }
+
+        $this->user = $user;
+
+        return $user;
+    }
+
+    /**
+     * Determine if current user is authenticated. If not, throw an exception.
+     *
+     * @throws ApiAuthException
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable
+     */
+    public function authenticate()
+    {
+        if (!is_null($user = $this->user())) {
+            return $user;
+        }
+
+        if ($this->lastAuthException) {
+            throw $this->lastAuthException;
+        }
+
+        throw new ApiAuthException('Unauthorized');
+    }
+
+    /**
+     * Check the API token in the request and fetch a valid authorised user.
+     *
+     * @throws ApiAuthException
+     */
+    protected function getAuthorisedUserFromRequest(): Authenticatable
+    {
+        $authToken = trim($this->request->headers->get('Authorization', ''));
+        $this->validateTokenHeaderValue($authToken);
+
+        [$id, $secret] = explode(':', str_replace('Token ', '', $authToken));
+        $token = ApiToken::query()
+            ->where('token_id', '=', $id)
+            ->with(['user'])->first();
+
+        $this->validateToken($token, $secret);
+
+        if ($this->loginService->awaitingEmailConfirmation($token->user)) {
+            throw new ApiAuthException(trans('errors.email_confirmation_awaiting'));
+        }
+
+        return $token->user;
+    }
+
+    /**
+     * Validate the format of the token header value string.
+     *
+     * @throws ApiAuthException
+     */
+    protected function validateTokenHeaderValue(string $authToken): void
+    {
+        if (empty($authToken)) {
+            throw new ApiAuthException(trans('errors.api_no_authorization_found'));
+        }
+
+        if (strpos($authToken, ':') === false || strpos($authToken, 'Token ') !== 0) {
+            throw new ApiAuthException(trans('errors.api_bad_authorization_format'));
+        }
+    }
+
+    /**
+     * Validate the given secret against the given token and ensure the token
+     * currently has access to the instance API.
+     *
+     * @throws ApiAuthException
+     */
+    protected function validateToken(?ApiToken $token, string $secret): void
+    {
+        if ($token === null) {
+            throw new ApiAuthException(trans('errors.api_user_token_not_found'));
+        }
+
+        if (!Hash::check($secret, $token->secret)) {
+            throw new ApiAuthException(trans('errors.api_incorrect_token_secret'));
+        }
+
+        $now = Carbon::now();
+        if ($token->expires_at <= $now) {
+            throw new ApiAuthException(trans('errors.api_user_token_expired'), 403);
+        }
+
+        if (!$token->user->can('access-api')) {
+            throw new ApiAuthException(trans('errors.api_user_no_api_permission'), 403);
+        }
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function validate(array $credentials = [])
+    {
+        if (empty($credentials['id']) || empty($credentials['secret'])) {
+            return false;
+        }
+
+        $token = ApiToken::query()
+            ->where('token_id', '=', $credentials['id'])
+            ->with(['user'])->first();
+
+        if ($token === null) {
+            return false;
+        }
+
+        return Hash::check($credentials['secret'], $token->secret);
+    }
+
+    /**
+     * "Log out" the currently authenticated user.
+     */
+    public function logout()
+    {
+        $this->user = null;
+    }
+}
--- a/app/Api/ListingResponseBuilder.php
+++ b/app/Api/ListingResponseBuilder.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace BookStack\Api;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Http\Request;
+
+class ListingResponseBuilder
+{
+    protected $query;
+    protected $request;
+    protected $fields;
+
+    protected $filterOperators = [
+        'eq'   => '=',
+        'ne'   => '!=',
+        'gt'   => '>',
+        'lt'   => '<',
+        'gte'  => '>=',
+        'lte'  => '<=',
+        'like' => 'like',
+    ];
+
+    /**
+     * ListingResponseBuilder constructor.
+     */
+    public function __construct(Builder $query, Request $request, array $fields)
+    {
+        $this->query = $query;
+        $this->request = $request;
+        $this->fields = $fields;
+    }
+
+    /**
+     * Get the response from this builder.
+     */
+    public function toResponse()
+    {
+        $filteredQuery = $this->filterQuery($this->query);
+
+        $total = $filteredQuery->count();
+        $data = $this->fetchData($filteredQuery);
+
+        return response()->json([
+            'data'  => $data,
+            'total' => $total,
+        ]);
+    }
+
+    /**
+     * Fetch the data to return in the response.
+     */
+    protected function fetchData(Builder $query): Collection
+    {
+        $query = $this->countAndOffsetQuery($query);
+        $query = $this->sortQuery($query);
+
+        return $query->get($this->fields);
+    }
+
+    /**
+     * Apply any filtering operations found in the request.
+     */
+    protected function filterQuery(Builder $query): Builder
+    {
+        $query = clone $query;
+        $requestFilters = $this->request->get('filter', []);
+        if (!is_array($requestFilters)) {
+            return $query;
+        }
+
+        $queryFilters = collect($requestFilters)->map(function ($value, $key) {
+            return $this->requestFilterToQueryFilter($key, $value);
+        })->filter(function ($value) {
+            return !is_null($value);
+        })->values()->toArray();
+
+        return $query->where($queryFilters);
+    }
+
+    /**
+     * Convert a request filter query key/value pair into a [field, op, value] where condition.
+     */
+    protected function requestFilterToQueryFilter($fieldKey, $value): ?array
+    {
+        $splitKey = explode(':', $fieldKey);
+        $field = $splitKey[0];
+        $filterOperator = $splitKey[1] ?? 'eq';
+
+        if (!in_array($field, $this->fields)) {
+            return null;
+        }
+
+        if (!in_array($filterOperator, array_keys($this->filterOperators))) {
+            $filterOperator = 'eq';
+        }
+
+        $queryOperator = $this->filterOperators[$filterOperator];
+
+        return [$field, $queryOperator, $value];
+    }
+
+    /**
+     * Apply sorting operations to the query from given parameters
+     * otherwise falling back to the first given field, ascending.
+     */
+    protected function sortQuery(Builder $query): Builder
+    {
+        $query = clone $query;
+        $defaultSortName = $this->fields[0];
+        $direction = 'asc';
+
+        $sort = $this->request->get('sort', '');
+        if (strpos($sort, '-') === 0) {
+            $direction = 'desc';
+        }
+
+        $sortName = ltrim($sort, '+- ');
+        if (!in_array($sortName, $this->fields)) {
+            $sortName = $defaultSortName;
+        }
+
+        return $query->orderBy($sortName, $direction);
+    }
+
+    /**
+     * Apply count and offset for paging, based on params from the request while falling
+     * back to system defined default, taking the max limit into account.
+     */
+    protected function countAndOffsetQuery(Builder $query): Builder
+    {
+        $query = clone $query;
+        $offset = max(0, $this->request->get('offset', 0));
+        $maxCount = config('api.max_item_count');
+        $count = $this->request->get('count', config('api.default_item_count'));
+        $count = max(min($maxCount, $count), 1);
+
+        return $query->skip($offset)->take($count);
+    }
+}
--- a/app/Application.php
+++ b/app/Application.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace BookStack;
+
+class Application extends \Illuminate\Foundation\Application
+{
+    /**
+     * Get the path to the application configuration files.
+     *
+     * @param string $path Optionally, a path to append to the config path
+     *
+     * @return string
+     */
+    public function configPath($path = '')
+    {
+        return $this->basePath
+            . DIRECTORY_SEPARATOR
+            . 'app'
+            . DIRECTORY_SEPARATOR
+            . 'Config'
+            . ($path ? DIRECTORY_SEPARATOR . $path : $path);
+    }
+}
--- a/app/Attachment.php
+++ b/app/Attachment.php
@@ -1,39 +0,0 @@
-<?php namespace BookStack;
-
-class Attachment extends Ownable
-{
-    protected $fillable = ['name', 'order'];
-
-    /**
-     * Get the downloadable file name for this upload.
-     * @return mixed|string
-     */
-    public function getFileName()
-    {
-        if (str_contains($this->name, '.')) {
-            return $this->name;
-        }
-        return $this->name . '.' . $this->extension;
-    }
-
-    /**
-     * Get the page this file was uploaded to.
-     * @return Page
-     */
-    public function page()
-    {
-        return $this->belongsTo(Page::class, 'uploaded_to');
-    }
-
-    /**
-     * Get the url of this file.
-     * @return string
-     */
-    public function getUrl()
-    {
-        if ($this->external && strpos($this->path, 'http') !== 0) {
-            return $this->path;
-        }
-        return baseUrl('/attachments/' . $this->id);
-    }
-}
--- a/app/Auth/Access/EmailConfirmationService.php
+++ b/app/Auth/Access/EmailConfirmationService.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\User;
+use BookStack\Exceptions\ConfirmationEmailException;
+use BookStack\Notifications\ConfirmEmail;
+
+class EmailConfirmationService extends UserTokenService
+{
+    protected $tokenTable = 'email_confirmations';
+    protected $expiryTime = 24;
+
+    /**
+     * Create new confirmation for a user,
+     * Also removes any existing old ones.
+     *
+     * @throws ConfirmationEmailException
+     */
+    public function sendConfirmation(User $user)
+    {
+        if ($user->email_confirmed) {
+            throw new ConfirmationEmailException(trans('errors.email_already_confirmed'), '/login');
+        }
+
+        $this->deleteByUser($user);
+        $token = $this->createTokenForUser($user);
+
+        $user->notify(new ConfirmEmail($token));
+    }
+
+    /**
+     * Check if confirmation is required in this instance.
+     */
+    public function confirmationRequired(): bool
+    {
+        return setting('registration-confirmation')
+            || setting('registration-restrict');
+    }
+}
--- a/app/Auth/Access/ExternalAuthService.php
+++ b/app/Auth/Access/ExternalAuthService.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\Role;
+use BookStack\Auth\User;
+use Illuminate\Support\Collection;
+
+class ExternalAuthService
+{
+    /**
+     * Check a role against an array of group names to see if it matches.
+     * Checked against role 'external_auth_id' if set otherwise the name of the role.
+     */
+    protected function roleMatchesGroupNames(Role $role, array $groupNames): bool
+    {
+        if ($role->external_auth_id) {
+            return $this->externalIdMatchesGroupNames($role->external_auth_id, $groupNames);
+        }
+
+        $roleName = str_replace(' ', '-', trim(strtolower($role->display_name)));
+
+        return in_array($roleName, $groupNames);
+    }
+
+    /**
+     * Check if the given external auth ID string matches one of the given group names.
+     */
+    protected function externalIdMatchesGroupNames(string $externalId, array $groupNames): bool
+    {
+        $externalAuthIds = explode(',', strtolower($externalId));
+
+        foreach ($externalAuthIds as $externalAuthId) {
+            if (in_array(trim($externalAuthId), $groupNames)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Match an array of group names to BookStack system roles.
+     * Formats group names to be lower-case and hyphenated.
+     */
+    protected function matchGroupsToSystemsRoles(array $groupNames): Collection
+    {
+        foreach ($groupNames as $i => $groupName) {
+            $groupNames[$i] = str_replace(' ', '-', trim(strtolower($groupName)));
+        }
+
+        $roles = Role::query()->get(['id', 'external_auth_id', 'display_name']);
+        $matchedRoles = $roles->filter(function (Role $role) use ($groupNames) {
+            return $this->roleMatchesGroupNames($role, $groupNames);
+        });
+
+        return $matchedRoles->pluck('id');
+    }
+
+    /**
+     * Sync the groups to the user roles for the current user.
+     */
+    public function syncWithGroups(User $user, array $userGroups): void
+    {
+        // Get the ids for the roles from the names
+        $groupsAsRoles = $this->matchGroupsToSystemsRoles($userGroups);
+
+        // Sync groups
+        if ($this->config['remove_from_groups']) {
+            $user->roles()->sync($groupsAsRoles);
+            $user->attachDefaultRole();
+        } else {
+            $user->roles()->syncWithoutDetaching($groupsAsRoles);
+        }
+    }
+}
--- a/app/Auth/Access/ExternalBaseUserProvider.php
+++ b/app/Auth/Access/ExternalBaseUserProvider.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Contracts\Auth\UserProvider;
+
+class ExternalBaseUserProvider implements UserProvider
+{
+    /**
+     * The user model.
+     *
+     * @var string
+     */
+    protected $model;
+
+    /**
+     * LdapUserProvider constructor.
+     *
+     * @param $model
+     */
+    public function __construct(string $model)
+    {
+        $this->model = $model;
+    }
+
+    /**
+     * Create a new instance of the model.
+     *
+     * @return \Illuminate\Database\Eloquent\Model
+     */
+    public function createModel()
+    {
+        $class = '\\' . ltrim($this->model, '\\');
+
+        return new $class();
+    }
+
+    /**
+     * Retrieve a user by their unique identifier.
+     *
+     * @param mixed $identifier
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|null
+     */
+    public function retrieveById($identifier)
+    {
+        return $this->createModel()->newQuery()->find($identifier);
+    }
+
+    /**
+     * Retrieve a user by their unique identifier and "remember me" token.
+     *
+     * @param mixed  $identifier
+     * @param string $token
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|null
+     */
+    public function retrieveByToken($identifier, $token)
+    {
+        return null;
+    }
+
+    /**
+     * Update the "remember me" token for the given user in storage.
+     *
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     * @param string                                     $token
+     *
+     * @return void
+     */
+    public function updateRememberToken(Authenticatable $user, $token)
+    {
+        //
+    }
+
+    /**
+     * Retrieve a user by the given credentials.
+     *
+     * @param array $credentials
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|null
+     */
+    public function retrieveByCredentials(array $credentials)
+    {
+        // Search current user base by looking up a uid
+        $model = $this->createModel();
+
+        return $model->newQuery()
+            ->where('external_auth_id', $credentials['external_auth_id'])
+            ->first();
+    }
+
+    /**
+     * Validate a user against the given credentials.
+     *
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     * @param array                                      $credentials
+     *
+     * @return bool
+     */
+    public function validateCredentials(Authenticatable $user, array $credentials)
+    {
+        // Should be done in the guard.
+        return false;
+    }
+}
--- a/app/Auth/Access/Guards/ExternalBaseSessionGuard.php
+++ b/app/Auth/Access/Guards/ExternalBaseSessionGuard.php
@@ -0,0 +1,305 @@
+<?php
+
+namespace BookStack\Auth\Access\Guards;
+
+use BookStack\Auth\Access\RegistrationService;
+use Illuminate\Auth\GuardHelpers;
+use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
+use Illuminate\Contracts\Auth\StatefulGuard;
+use Illuminate\Contracts\Auth\UserProvider;
+use Illuminate\Contracts\Session\Session;
+
+/**
+ * Class BaseSessionGuard
+ * A base implementation of a session guard. Is a copy of the default Laravel
+ * guard with 'remember' functionality removed. Basic auth and event emission
+ * has also been removed to keep this simple. Designed to be extended by external
+ * Auth Guards.
+ */
+class ExternalBaseSessionGuard implements StatefulGuard
+{
+    use GuardHelpers;
+
+    /**
+     * The name of the Guard. Typically "session".
+     *
+     * Corresponds to guard name in authentication configuration.
+     *
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * The user we last attempted to retrieve.
+     *
+     * @var \Illuminate\Contracts\Auth\Authenticatable
+     */
+    protected $lastAttempted;
+
+    /**
+     * The session used by the guard.
+     *
+     * @var \Illuminate\Contracts\Session\Session
+     */
+    protected $session;
+
+    /**
+     * Indicates if the logout method has been called.
+     *
+     * @var bool
+     */
+    protected $loggedOut = false;
+
+    /**
+     * Service to handle common registration actions.
+     *
+     * @var RegistrationService
+     */
+    protected $registrationService;
+
+    /**
+     * Create a new authentication guard.
+     *
+     * @return void
+     */
+    public function __construct(string $name, UserProvider $provider, Session $session, RegistrationService $registrationService)
+    {
+        $this->name = $name;
+        $this->session = $session;
+        $this->provider = $provider;
+        $this->registrationService = $registrationService;
+    }
+
+    /**
+     * Get the currently authenticated user.
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|null
+     */
+    public function user()
+    {
+        if ($this->loggedOut) {
+            return;
+        }
+
+        // If we've already retrieved the user for the current request we can just
+        // return it back immediately. We do not want to fetch the user data on
+        // every call to this method because that would be tremendously slow.
+        if (!is_null($this->user)) {
+            return $this->user;
+        }
+
+        $id = $this->session->get($this->getName());
+
+        // First we will try to load the user using the
+        // identifier in the session if one exists.
+        if (!is_null($id)) {
+            $this->user = $this->provider->retrieveById($id);
+        }
+
+        return $this->user;
+    }
+
+    /**
+     * Get the ID for the currently authenticated user.
+     *
+     * @return int|null
+     */
+    public function id()
+    {
+        if ($this->loggedOut) {
+            return;
+        }
+
+        return $this->user()
+            ? $this->user()->getAuthIdentifier()
+            : $this->session->get($this->getName());
+    }
+
+    /**
+     * Log a user into the application without sessions or cookies.
+     *
+     * @param array $credentials
+     *
+     * @return bool
+     */
+    public function once(array $credentials = [])
+    {
+        if ($this->validate($credentials)) {
+            $this->setUser($this->lastAttempted);
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Log the given user ID into the application without sessions or cookies.
+     *
+     * @param mixed $id
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|false
+     */
+    public function onceUsingId($id)
+    {
+        if (!is_null($user = $this->provider->retrieveById($id))) {
+            $this->setUser($user);
+
+            return $user;
+        }
+
+        return false;
+    }
+
+    /**
+     * Validate a user's credentials.
+     *
+     * @param array $credentials
+     *
+     * @return bool
+     */
+    public function validate(array $credentials = [])
+    {
+        return false;
+    }
+
+    /**
+     * Attempt to authenticate a user using the given credentials.
+     *
+     * @param array $credentials
+     * @param bool  $remember
+     *
+     * @return bool
+     */
+    public function attempt(array $credentials = [], $remember = false)
+    {
+        return false;
+    }
+
+    /**
+     * Log the given user ID into the application.
+     *
+     * @param mixed $id
+     * @param bool  $remember
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|false
+     */
+    public function loginUsingId($id, $remember = false)
+    {
+        // Always return false as to disable this method,
+        // Logins should route through LoginService.
+        return false;
+    }
+
+    /**
+     * Log a user into the application.
+     *
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     * @param bool                                       $remember
+     *
+     * @return void
+     */
+    public function login(AuthenticatableContract $user, $remember = false)
+    {
+        $this->updateSession($user->getAuthIdentifier());
+
+        $this->setUser($user);
+    }
+
+    /**
+     * Update the session with the given ID.
+     *
+     * @param string $id
+     *
+     * @return void
+     */
+    protected function updateSession($id)
+    {
+        $this->session->put($this->getName(), $id);
+
+        $this->session->migrate(true);
+    }
+
+    /**
+     * Log the user out of the application.
+     *
+     * @return void
+     */
+    public function logout()
+    {
+        $this->clearUserDataFromStorage();
+
+        // Now we will clear the users out of memory so they are no longer available
+        // as the user is no longer considered as being signed into this
+        // application and should not be available here.
+        $this->user = null;
+
+        $this->loggedOut = true;
+    }
+
+    /**
+     * Remove the user data from the session and cookies.
+     *
+     * @return void
+     */
+    protected function clearUserDataFromStorage()
+    {
+        $this->session->remove($this->getName());
+    }
+
+    /**
+     * Get the last user we attempted to authenticate.
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable
+     */
+    public function getLastAttempted()
+    {
+        return $this->lastAttempted;
+    }
+
+    /**
+     * Get a unique identifier for the auth session value.
+     *
+     * @return string
+     */
+    public function getName()
+    {
+        return 'login_' . $this->name . '_' . sha1(static::class);
+    }
+
+    /**
+     * Determine if the user was authenticated via "remember me" cookie.
+     *
+     * @return bool
+     */
+    public function viaRemember()
+    {
+        return false;
+    }
+
+    /**
+     * Return the currently cached user.
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable|null
+     */
+    public function getUser()
+    {
+        return $this->user;
+    }
+
+    /**
+     * Set the current user.
+     *
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     *
+     * @return $this
+     */
+    public function setUser(AuthenticatableContract $user)
+    {
+        $this->user = $user;
+
+        $this->loggedOut = false;
+
+        return $this;
+    }
+}
--- a/app/Auth/Access/Guards/LdapSessionGuard.php
+++ b/app/Auth/Access/Guards/LdapSessionGuard.php
@@ -0,0 +1,133 @@
+<?php
+
+namespace BookStack\Auth\Access\Guards;
+
+use BookStack\Auth\Access\LdapService;
+use BookStack\Auth\Access\RegistrationService;
+use BookStack\Auth\User;
+use BookStack\Exceptions\LdapException;
+use BookStack\Exceptions\LoginAttemptEmailNeededException;
+use BookStack\Exceptions\LoginAttemptException;
+use BookStack\Exceptions\UserRegistrationException;
+use Illuminate\Contracts\Auth\UserProvider;
+use Illuminate\Contracts\Session\Session;
+use Illuminate\Support\Str;
+
+class LdapSessionGuard extends ExternalBaseSessionGuard
+{
+    protected $ldapService;
+
+    /**
+     * LdapSessionGuard constructor.
+     */
+    public function __construct(
+        $name,
+        UserProvider $provider,
+        Session $session,
+        LdapService $ldapService,
+        RegistrationService $registrationService
+    ) {
+        $this->ldapService = $ldapService;
+        parent::__construct($name, $provider, $session, $registrationService);
+    }
+
+    /**
+     * Validate a user's credentials.
+     *
+     * @param array $credentials
+     *
+     * @throws LdapException
+     *
+     * @return bool
+     */
+    public function validate(array $credentials = [])
+    {
+        $userDetails = $this->ldapService->getUserDetails($credentials['username']);
+
+        if (isset($userDetails['uid'])) {
+            $this->lastAttempted = $this->provider->retrieveByCredentials([
+                'external_auth_id' => $userDetails['uid'],
+            ]);
+        }
+
+        return $this->ldapService->validateUserCredentials($userDetails, $credentials['password']);
+    }
+
+    /**
+     * Attempt to authenticate a user using the given credentials.
+     *
+     * @param array $credentials
+     * @param bool  $remember
+     *
+     * @throws LoginAttemptException
+     * @throws LdapException
+     *
+     * @return bool
+     */
+    public function attempt(array $credentials = [], $remember = false)
+    {
+        $username = $credentials['username'];
+        $userDetails = $this->ldapService->getUserDetails($username);
+
+        $user = null;
+        if (isset($userDetails['uid'])) {
+            $this->lastAttempted = $user = $this->provider->retrieveByCredentials([
+                'external_auth_id' => $userDetails['uid'],
+            ]);
+        }
+
+        if (!$this->ldapService->validateUserCredentials($userDetails, $credentials['password'])) {
+            return false;
+        }
+
+        if (is_null($user)) {
+            try {
+                $user = $this->createNewFromLdapAndCreds($userDetails, $credentials);
+            } catch (UserRegistrationException $exception) {
+                throw new LoginAttemptException($exception->message);
+            }
+        }
+
+        // Sync LDAP groups if required
+        if ($this->ldapService->shouldSyncGroups()) {
+            $this->ldapService->syncGroups($user, $username);
+        }
+
+        // Attach avatar if non-existent
+        if (is_null($user->avatar)) {
+            $this->ldapService->saveAndAttachAvatar($user, $userDetails);
+        }
+
+        $this->login($user, $remember);
+
+        return true;
+    }
+
+    /**
+     * Create a new user from the given ldap credentials and login credentials.
+     *
+     * @throws LoginAttemptEmailNeededException
+     * @throws LoginAttemptException
+     * @throws UserRegistrationException
+     */
+    protected function createNewFromLdapAndCreds(array $ldapUserDetails, array $credentials): User
+    {
+        $email = trim($ldapUserDetails['email'] ?: ($credentials['email'] ?? ''));
+
+        if (empty($email)) {
+            throw new LoginAttemptEmailNeededException();
+        }
+
+        $details = [
+            'name'             => $ldapUserDetails['name'],
+            'email'            => $ldapUserDetails['email'] ?: $credentials['email'],
+            'external_auth_id' => $ldapUserDetails['uid'],
+            'password'         => Str::random(32),
+        ];
+
+        $user = $this->registrationService->registerUser($details, null, false);
+        $this->ldapService->saveAndAttachAvatar($user, $ldapUserDetails);
+
+        return $user;
+    }
+}
--- a/app/Auth/Access/Guards/Saml2SessionGuard.php
+++ b/app/Auth/Access/Guards/Saml2SessionGuard.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace BookStack\Auth\Access\Guards;
+
+/**
+ * Saml2 Session Guard.
+ *
+ * The saml2 login process is async in nature meaning it does not fit very well
+ * into the default laravel 'Guard' auth flow. Instead most of the logic is done
+ * via the Saml2 controller & Saml2Service. This class provides a safer, thin
+ * version of SessionGuard.
+ */
+class Saml2SessionGuard extends ExternalBaseSessionGuard
+{
+    /**
+     * Validate a user's credentials.
+     *
+     * @param array $credentials
+     *
+     * @return bool
+     */
+    public function validate(array $credentials = [])
+    {
+        return false;
+    }
+
+    /**
+     * Attempt to authenticate a user using the given credentials.
+     *
+     * @param array $credentials
+     * @param bool  $remember
+     *
+     * @return bool
+     */
+    public function attempt(array $credentials = [], $remember = false)
+    {
+        return false;
+    }
+}
--- a/app/Auth/Access/Ldap.php
+++ b/app/Auth/Access/Ldap.php
@@ -1,18 +1,20 @@
-<?php namespace BookStack\Services;
+<?php
+
+namespace BookStack\Auth\Access;

 /**
 * Class Ldap
 * An object-orientated thin abstraction wrapper for common PHP LDAP functions.
 * Allows the standard LDAP functions to be mocked for testing.
- * @package BookStack\Services
 */
 class Ldap
 {
-
    /**
     * Connect to a LDAP server.
+     *
     * @param string $hostName
     * @param int    $port
+     *
     * @return resource
     */
    public function connect($hostName, $port)
@@ -22,9 +24,11 @@ class Ldap

    /**
     * Set the value of a LDAP option for the given connection.
+     *
     * @param resource $ldapConnection
-     * @param int $option
-     * @param mixed $value
+     * @param int      $option
+     * @param mixed    $value
+     *
     * @return bool
     */
    public function setOption($ldapConnection, $option, $value)
@@ -32,10 +36,20 @@ class Ldap
        return ldap_set_option($ldapConnection, $option, $value);
    }

+    /**
+     * Start TLS on the given LDAP connection.
+     */
+    public function startTls($ldapConnection): bool
+    {
+        return ldap_start_tls($ldapConnection);
+    }
+
    /**
     * Set the version number for the given ldap connection.
+     *
     * @param $ldapConnection
     * @param $version
+     *
     * @return bool
     */
    public function setVersion($ldapConnection, $version)
@@ -45,10 +59,12 @@ class Ldap

    /**
     * Search LDAP tree using the provided filter.
+     *
     * @param resource   $ldapConnection
     * @param string     $baseDn
     * @param string     $filter
     * @param array|null $attributes
+     *
     * @return resource
     */
    public function search($ldapConnection, $baseDn, $filter, array $attributes = null)
@@ -58,8 +74,10 @@ class Ldap

    /**
     * Get entries from an ldap search result.
+     *
     * @param resource $ldapConnection
     * @param resource $ldapSearchResult
+     *
     * @return array
     */
    public function getEntries($ldapConnection, $ldapSearchResult)
@@ -69,27 +87,59 @@ class Ldap

    /**
     * Search and get entries immediately.
+     *
     * @param resource   $ldapConnection
     * @param string     $baseDn
     * @param string     $filter
     * @param array|null $attributes
+     *
     * @return resource
     */
    public function searchAndGetEntries($ldapConnection, $baseDn, $filter, array $attributes = null)
    {
        $search = $this->search($ldapConnection, $baseDn, $filter, $attributes);
+
        return $this->getEntries($ldapConnection, $search);
    }

    /**
     * Bind to LDAP directory.
+     *
     * @param resource $ldapConnection
     * @param string   $bindRdn
     * @param string   $bindPassword
+     *
     * @return bool
     */
    public function bind($ldapConnection, $bindRdn = null, $bindPassword = null)
    {
        return ldap_bind($ldapConnection, $bindRdn, $bindPassword);
    }
+
+    /**
+     * Explode a LDAP dn string into an array of components.
+     *
+     * @param string $dn
+     * @param int    $withAttrib
+     *
+     * @return array
+     */
+    public function explodeDn(string $dn, int $withAttrib)
+    {
+        return ldap_explode_dn($dn, $withAttrib);
+    }
+
+    /**
+     * Escape a string for use in an LDAP filter.
+     *
+     * @param string $value
+     * @param string $ignore
+     * @param int    $flags
+     *
+     * @return string
+     */
+    public function escape(string $value, string $ignore = '', int $flags = 0)
+    {
+        return ldap_escape($value, $ignore, $flags);
+    }
 }
--- a/app/Auth/Access/LdapService.php
+++ b/app/Auth/Access/LdapService.php
@@ -0,0 +1,397 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\User;
+use BookStack\Exceptions\JsonDebugException;
+use BookStack\Exceptions\LdapException;
+use BookStack\Uploads\UserAvatars;
+use ErrorException;
+use Illuminate\Support\Facades\Log;
+
+/**
+ * Class LdapService
+ * Handles any app-specific LDAP tasks.
+ */
+class LdapService extends ExternalAuthService
+{
+    protected $ldap;
+    protected $ldapConnection;
+    protected $userAvatars;
+    protected $config;
+    protected $enabled;
+
+    /**
+     * LdapService constructor.
+     */
+    public function __construct(Ldap $ldap, UserAvatars $userAvatars)
+    {
+        $this->ldap = $ldap;
+        $this->userAvatars = $userAvatars;
+        $this->config = config('services.ldap');
+        $this->enabled = config('auth.method') === 'ldap';
+    }
+
+    /**
+     * Check if groups should be synced.
+     *
+     * @return bool
+     */
+    public function shouldSyncGroups()
+    {
+        return $this->enabled && $this->config['user_to_groups'] !== false;
+    }
+
+    /**
+     * Search for attributes for a specific user on the ldap.
+     *
+     * @throws LdapException
+     */
+    private function getUserWithAttributes(string $userName, array $attributes): ?array
+    {
+        $ldapConnection = $this->getConnection();
+        $this->bindSystemUser($ldapConnection);
+
+        // Clean attributes
+        foreach ($attributes as $index => $attribute) {
+            if (strpos($attribute, 'BIN;') === 0) {
+                $attributes[$index] = substr($attribute, strlen('BIN;'));
+            }
+        }
+
+        // Find user
+        $userFilter = $this->buildFilter($this->config['user_filter'], ['user' => $userName]);
+        $baseDn = $this->config['base_dn'];
+
+        $followReferrals = $this->config['follow_referrals'] ? 1 : 0;
+        $this->ldap->setOption($ldapConnection, LDAP_OPT_REFERRALS, $followReferrals);
+        $users = $this->ldap->searchAndGetEntries($ldapConnection, $baseDn, $userFilter, $attributes);
+        if ($users['count'] === 0) {
+            return null;
+        }
+
+        return $users[0];
+    }
+
+    /**
+     * Get the details of a user from LDAP using the given username.
+     * User found via configurable user filter.
+     *
+     * @throws LdapException
+     */
+    public function getUserDetails(string $userName): ?array
+    {
+        $idAttr = $this->config['id_attribute'];
+        $emailAttr = $this->config['email_attribute'];
+        $displayNameAttr = $this->config['display_name_attribute'];
+        $thumbnailAttr = $this->config['thumbnail_attribute'];
+
+        $user = $this->getUserWithAttributes($userName, array_filter([
+            'cn', 'dn', $idAttr, $emailAttr, $displayNameAttr, $thumbnailAttr,
+        ]));
+
+        if (is_null($user)) {
+            return null;
+        }
+
+        $userCn = $this->getUserResponseProperty($user, 'cn', null);
+        $formatted = [
+            'uid'   => $this->getUserResponseProperty($user, $idAttr, $user['dn']),
+            'name'  => $this->getUserResponseProperty($user, $displayNameAttr, $userCn),
+            'dn'    => $user['dn'],
+            'email' => $this->getUserResponseProperty($user, $emailAttr, null),
+            'avatar'=> $thumbnailAttr ? $this->getUserResponseProperty($user, $thumbnailAttr, null) : null,
+        ];
+
+        if ($this->config['dump_user_details']) {
+            throw new JsonDebugException([
+                'details_from_ldap'        => $user,
+                'details_bookstack_parsed' => $formatted,
+            ]);
+        }
+
+        return $formatted;
+    }
+
+    /**
+     * Get a property from an LDAP user response fetch.
+     * Handles properties potentially being part of an array.
+     * If the given key is prefixed with 'BIN;', that indicator will be stripped
+     * from the key and any fetched values will be converted from binary to hex.
+     */
+    protected function getUserResponseProperty(array $userDetails, string $propertyKey, $defaultValue)
+    {
+        $isBinary = strpos($propertyKey, 'BIN;') === 0;
+        $propertyKey = strtolower($propertyKey);
+        $value = $defaultValue;
+
+        if ($isBinary) {
+            $propertyKey = substr($propertyKey, strlen('BIN;'));
+        }
+
+        if (isset($userDetails[$propertyKey])) {
+            $value = (is_array($userDetails[$propertyKey]) ? $userDetails[$propertyKey][0] : $userDetails[$propertyKey]);
+            if ($isBinary) {
+                $value = bin2hex($value);
+            }
+        }
+
+        return $value;
+    }
+
+    /**
+     * Check if the given credentials are valid for the given user.
+     *
+     * @throws LdapException
+     */
+    public function validateUserCredentials(?array $ldapUserDetails, string $password): bool
+    {
+        if (is_null($ldapUserDetails)) {
+            return false;
+        }
+
+        $ldapConnection = $this->getConnection();
+
+        try {
+            $ldapBind = $this->ldap->bind($ldapConnection, $ldapUserDetails['dn'], $password);
+        } catch (ErrorException $e) {
+            $ldapBind = false;
+        }
+
+        return $ldapBind;
+    }
+
+    /**
+     * Bind the system user to the LDAP connection using the given credentials
+     * otherwise anonymous access is attempted.
+     *
+     * @param $connection
+     *
+     * @throws LdapException
+     */
+    protected function bindSystemUser($connection)
+    {
+        $ldapDn = $this->config['dn'];
+        $ldapPass = $this->config['pass'];
+
+        $isAnonymous = ($ldapDn === false || $ldapPass === false);
+        if ($isAnonymous) {
+            $ldapBind = $this->ldap->bind($connection);
+        } else {
+            $ldapBind = $this->ldap->bind($connection, $ldapDn, $ldapPass);
+        }
+
+        if (!$ldapBind) {
+            throw new LdapException(($isAnonymous ? trans('errors.ldap_fail_anonymous') : trans('errors.ldap_fail_authed')));
+        }
+    }
+
+    /**
+     * Get the connection to the LDAP server.
+     * Creates a new connection if one does not exist.
+     *
+     * @throws LdapException
+     *
+     * @return resource
+     */
+    protected function getConnection()
+    {
+        if ($this->ldapConnection !== null) {
+            return $this->ldapConnection;
+        }
+
+        // Check LDAP extension in installed
+        if (!function_exists('ldap_connect') && config('app.env') !== 'testing') {
+            throw new LdapException(trans('errors.ldap_extension_not_installed'));
+        }
+
+        // Disable certificate verification.
+        // This option works globally and must be set before a connection is created.
+        if ($this->config['tls_insecure']) {
+            $this->ldap->setOption(null, LDAP_OPT_X_TLS_REQUIRE_CERT, LDAP_OPT_X_TLS_NEVER);
+        }
+
+        $serverDetails = $this->parseServerString($this->config['server']);
+        $ldapConnection = $this->ldap->connect($serverDetails['host'], $serverDetails['port']);
+
+        if ($ldapConnection === false) {
+            throw new LdapException(trans('errors.ldap_cannot_connect'));
+        }
+
+        // Set any required options
+        if ($this->config['version']) {
+            $this->ldap->setVersion($ldapConnection, $this->config['version']);
+        }
+
+        // Start and verify TLS if it's enabled
+        if ($this->config['start_tls']) {
+            $started = $this->ldap->startTls($ldapConnection);
+            if (!$started) {
+                throw new LdapException('Could not start TLS connection');
+            }
+        }
+
+        $this->ldapConnection = $ldapConnection;
+
+        return $this->ldapConnection;
+    }
+
+    /**
+     * Parse a LDAP server string and return the host and port for a connection.
+     * Is flexible to formats such as 'ldap.example.com:8069' or 'ldaps://ldap.example.com'.
+     */
+    protected function parseServerString(string $serverString): array
+    {
+        $serverNameParts = explode(':', $serverString);
+
+        // If we have a protocol just return the full string since PHP will ignore a separate port.
+        if ($serverNameParts[0] === 'ldaps' || $serverNameParts[0] === 'ldap') {
+            return ['host' => $serverString, 'port' => 389];
+        }
+
+        // Otherwise, extract the port out
+        $hostName = $serverNameParts[0];
+        $ldapPort = (count($serverNameParts) > 1) ? intval($serverNameParts[1]) : 389;
+
+        return ['host' => $hostName, 'port' => $ldapPort];
+    }
+
+    /**
+     * Build a filter string by injecting common variables.
+     */
+    protected function buildFilter(string $filterString, array $attrs): string
+    {
+        $newAttrs = [];
+        foreach ($attrs as $key => $attrText) {
+            $newKey = '${' . $key . '}';
+            $newAttrs[$newKey] = $this->ldap->escape($attrText);
+        }
+
+        return strtr($filterString, $newAttrs);
+    }
+
+    /**
+     * Get the groups a user is a part of on ldap.
+     *
+     * @throws LdapException
+     */
+    public function getUserGroups(string $userName): array
+    {
+        $groupsAttr = $this->config['group_attribute'];
+        $user = $this->getUserWithAttributes($userName, [$groupsAttr]);
+
+        if ($user === null) {
+            return [];
+        }
+
+        $userGroups = $this->groupFilter($user);
+        $userGroups = $this->getGroupsRecursive($userGroups, []);
+
+        return $userGroups;
+    }
+
+    /**
+     * Get the parent groups of an array of groups.
+     *
+     * @throws LdapException
+     */
+    private function getGroupsRecursive(array $groupsArray, array $checked): array
+    {
+        $groupsToAdd = [];
+        foreach ($groupsArray as $groupName) {
+            if (in_array($groupName, $checked)) {
+                continue;
+            }
+
+            $parentGroups = $this->getGroupGroups($groupName);
+            $groupsToAdd = array_merge($groupsToAdd, $parentGroups);
+            $checked[] = $groupName;
+        }
+
+        $groupsArray = array_unique(array_merge($groupsArray, $groupsToAdd), SORT_REGULAR);
+
+        if (empty($groupsToAdd)) {
+            return $groupsArray;
+        }
+
+        return $this->getGroupsRecursive($groupsArray, $checked);
+    }
+
+    /**
+     * Get the parent groups of a single group.
+     *
+     * @throws LdapException
+     */
+    private function getGroupGroups(string $groupName): array
+    {
+        $ldapConnection = $this->getConnection();
+        $this->bindSystemUser($ldapConnection);
+
+        $followReferrals = $this->config['follow_referrals'] ? 1 : 0;
+        $this->ldap->setOption($ldapConnection, LDAP_OPT_REFERRALS, $followReferrals);
+
+        $baseDn = $this->config['base_dn'];
+        $groupsAttr = strtolower($this->config['group_attribute']);
+
+        $groupFilter = 'CN=' . $this->ldap->escape($groupName);
+        $groups = $this->ldap->searchAndGetEntries($ldapConnection, $baseDn, $groupFilter, [$groupsAttr]);
+        if ($groups['count'] === 0) {
+            return [];
+        }
+
+        return $this->groupFilter($groups[0]);
+    }
+
+    /**
+     * Filter out LDAP CN and DN language in a ldap search return.
+     * Gets the base CN (common name) of the string.
+     */
+    protected function groupFilter(array $userGroupSearchResponse): array
+    {
+        $groupsAttr = strtolower($this->config['group_attribute']);
+        $ldapGroups = [];
+        $count = 0;
+
+        if (isset($userGroupSearchResponse[$groupsAttr]['count'])) {
+            $count = (int) $userGroupSearchResponse[$groupsAttr]['count'];
+        }
+
+        for ($i = 0; $i < $count; $i++) {
+            $dnComponents = $this->ldap->explodeDn($userGroupSearchResponse[$groupsAttr][$i], 1);
+            if (!in_array($dnComponents[0], $ldapGroups)) {
+                $ldapGroups[] = $dnComponents[0];
+            }
+        }
+
+        return $ldapGroups;
+    }
+
+    /**
+     * Sync the LDAP groups to the user roles for the current user.
+     *
+     * @throws LdapException
+     */
+    public function syncGroups(User $user, string $username)
+    {
+        $userLdapGroups = $this->getUserGroups($username);
+        $this->syncWithGroups($user, $userLdapGroups);
+    }
+
+    /**
+     * Save and attach an avatar image, if found in the ldap details, and attach
+     * to the given user model.
+     */
+    public function saveAndAttachAvatar(User $user, array $ldapUserDetails): void
+    {
+        if (is_null(config('services.ldap.thumbnail_attribute')) || is_null($ldapUserDetails['avatar'])) {
+            return;
+        }
+
+        try {
+            $imageData = $ldapUserDetails['avatar'];
+            $this->userAvatars->assignToUserFromExistingData($user, $imageData, 'jpg');
+        } catch (\Exception $exception) {
+            Log::info("Failed to use avatar image from LDAP data for user id {$user->id}");
+        }
+    }
+}
--- a/app/Auth/Access/LoginService.php
+++ b/app/Auth/Access/LoginService.php
@@ -0,0 +1,164 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Actions\ActivityType;
+use BookStack\Auth\Access\Mfa\MfaSession;
+use BookStack\Auth\User;
+use BookStack\Exceptions\StoppedAuthenticationException;
+use BookStack\Facades\Activity;
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
+use Exception;
+
+class LoginService
+{
+    protected const LAST_LOGIN_ATTEMPTED_SESSION_KEY = 'auth-login-last-attempted';
+
+    protected $mfaSession;
+    protected $emailConfirmationService;
+
+    public function __construct(MfaSession $mfaSession, EmailConfirmationService $emailConfirmationService)
+    {
+        $this->mfaSession = $mfaSession;
+        $this->emailConfirmationService = $emailConfirmationService;
+    }
+
+    /**
+     * Log the given user into the system.
+     * Will start a login of the given user but will prevent if there's
+     * a reason to (MFA or Unconfirmed Email).
+     * Returns a boolean to indicate the current login result.
+     *
+     * @throws StoppedAuthenticationException
+     */
+    public function login(User $user, string $method, bool $remember = false): void
+    {
+        if ($this->awaitingEmailConfirmation($user) || $this->needsMfaVerification($user)) {
+            $this->setLastLoginAttemptedForUser($user, $method, $remember);
+
+            throw new StoppedAuthenticationException($user, $this);
+        }
+
+        $this->clearLastLoginAttempted();
+        auth()->login($user, $remember);
+        Activity::add(ActivityType::AUTH_LOGIN, "{$method}; {$user->logDescriptor()}");
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, $method, $user);
+
+        // Authenticate on all session guards if a likely admin
+        if ($user->can('users-manage') && $user->can('user-roles-manage')) {
+            $guards = ['standard', 'ldap', 'saml2'];
+            foreach ($guards as $guard) {
+                auth($guard)->login($user);
+            }
+        }
+    }
+
+    /**
+     * Reattempt a system login after a previous stopped attempt.
+     *
+     * @throws Exception
+     */
+    public function reattemptLoginFor(User $user)
+    {
+        if ($user->id !== ($this->getLastLoginAttemptUser()->id ?? null)) {
+            throw new Exception('Login reattempt user does align with current session state');
+        }
+
+        $lastLoginDetails = $this->getLastLoginAttemptDetails();
+        $this->login($user, $lastLoginDetails['method'], $lastLoginDetails['remember'] ?? false);
+    }
+
+    /**
+     * Get the last user that was attempted to be logged in.
+     * Only exists if the last login attempt had correct credentials
+     * but had been prevented by a secondary factor.
+     */
+    public function getLastLoginAttemptUser(): ?User
+    {
+        $id = $this->getLastLoginAttemptDetails()['user_id'];
+
+        return User::query()->where('id', '=', $id)->first();
+    }
+
+    /**
+     * Get the details of the last login attempt.
+     * Checks upon a ttl of about 1 hour since that last attempted login.
+     *
+     * @return array{user_id: ?string, method: ?string, remember: bool}
+     */
+    protected function getLastLoginAttemptDetails(): array
+    {
+        $value = session()->get(self::LAST_LOGIN_ATTEMPTED_SESSION_KEY);
+        if (!$value) {
+            return ['user_id' => null, 'method' => null];
+        }
+
+        [$id, $method, $remember, $time] = explode(':', $value);
+        $hourAgo = time() - (60 * 60);
+        if ($time < $hourAgo) {
+            $this->clearLastLoginAttempted();
+
+            return ['user_id' => null, 'method' => null];
+        }
+
+        return ['user_id' => $id, 'method' => $method, 'remember' => boolval($remember)];
+    }
+
+    /**
+     * Set the last login attempted user.
+     * Must be only used when credentials are correct and a login could be
+     * achieved but a secondary factor has stopped the login.
+     */
+    protected function setLastLoginAttemptedForUser(User $user, string $method, bool $remember)
+    {
+        session()->put(
+            self::LAST_LOGIN_ATTEMPTED_SESSION_KEY,
+            implode(':', [$user->id, $method, $remember, time()])
+        );
+    }
+
+    /**
+     * Clear the last login attempted session value.
+     */
+    protected function clearLastLoginAttempted(): void
+    {
+        session()->remove(self::LAST_LOGIN_ATTEMPTED_SESSION_KEY);
+    }
+
+    /**
+     * Check if MFA verification is needed.
+     */
+    public function needsMfaVerification(User $user): bool
+    {
+        return !$this->mfaSession->isVerifiedForUser($user) && $this->mfaSession->isRequiredForUser($user);
+    }
+
+    /**
+     * Check if the given user is awaiting email confirmation.
+     */
+    public function awaitingEmailConfirmation(User $user): bool
+    {
+        return $this->emailConfirmationService->confirmationRequired() && !$user->email_confirmed;
+    }
+
+    /**
+     * Attempt the login of a user using the given credentials.
+     * Meant to mirror Laravel's default guard 'attempt' method
+     * but in a manner that always routes through our login system.
+     * May interrupt the flow if extra authentication requirements are imposed.
+     *
+     * @throws StoppedAuthenticationException
+     */
+    public function attempt(array $credentials, string $method, bool $remember = false): bool
+    {
+        $result = auth()->attempt($credentials, $remember);
+        if ($result) {
+            $user = auth()->user();
+            auth()->logout();
+            $this->login($user, $method, $remember);
+        }
+
+        return $result;
+    }
+}
--- a/app/Auth/Access/Mfa/BackupCodeService.php
+++ b/app/Auth/Access/Mfa/BackupCodeService.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use Illuminate\Support\Str;
+
+class BackupCodeService
+{
+    /**
+     * Generate a new set of 16 backup codes.
+     */
+    public function generateNewSet(): array
+    {
+        $codes = [];
+        while (count($codes) < 16) {
+            $code = Str::random(5) . '-' . Str::random(5);
+            if (!in_array($code, $codes)) {
+                $codes[] = strtolower($code);
+            }
+        }
+
+        return $codes;
+    }
+
+    /**
+     * Check if the given code matches one of the available options.
+     */
+    public function inputCodeExistsInSet(string $code, string $codeSet): bool
+    {
+        $cleanCode = $this->cleanInputCode($code);
+        $codes = json_decode($codeSet);
+
+        return in_array($cleanCode, $codes);
+    }
+
+    /**
+     * Remove the given input code from the given available options.
+     * Will return a JSON string containing the codes.
+     */
+    public function removeInputCodeFromSet(string $code, string $codeSet): string
+    {
+        $cleanCode = $this->cleanInputCode($code);
+        $codes = json_decode($codeSet);
+        $pos = array_search($cleanCode, $codes, true);
+        array_splice($codes, $pos, 1);
+
+        return json_encode($codes);
+    }
+
+    /**
+     * Count the number of codes in the given set.
+     */
+    public function countCodesInSet(string $codeSet): int
+    {
+        return count(json_decode($codeSet));
+    }
+
+    protected function cleanInputCode(string $code): string
+    {
+        return strtolower(str_replace(' ', '-', trim($code)));
+    }
+}
--- a/app/Auth/Access/Mfa/MfaSession.php
+++ b/app/Auth/Access/Mfa/MfaSession.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use BookStack\Auth\User;
+
+class MfaSession
+{
+    /**
+     * Check if MFA is required for the given user.
+     */
+    public function isRequiredForUser(User $user): bool
+    {
+        // TODO - Test both these cases
+        return $user->mfaValues()->exists() || $this->userRoleEnforcesMfa($user);
+    }
+
+    /**
+     * Check if the given user is pending MFA setup.
+     * (MFA required but not yet configured).
+     */
+    public function isPendingMfaSetup(User $user): bool
+    {
+        return $this->isRequiredForUser($user) && !$user->mfaValues()->exists();
+    }
+
+    /**
+     * Check if a role of the given user enforces MFA.
+     */
+    protected function userRoleEnforcesMfa(User $user): bool
+    {
+        return $user->roles()
+            ->where('mfa_enforced', '=', true)
+            ->exists();
+    }
+
+    /**
+     * Check if the current MFA session has already been verified for the given user.
+     */
+    public function isVerifiedForUser(User $user): bool
+    {
+        return session()->get($this->getMfaVerifiedSessionKey($user)) === 'true';
+    }
+
+    /**
+     * Mark the current session as MFA-verified.
+     */
+    public function markVerifiedForUser(User $user): void
+    {
+        session()->put($this->getMfaVerifiedSessionKey($user), 'true');
+    }
+
+    /**
+     * Get the session key in which the MFA verification status is stored.
+     */
+    protected function getMfaVerifiedSessionKey(User $user): string
+    {
+        return 'mfa-verification-passed:' . $user->id;
+    }
+}
--- a/app/Auth/Access/Mfa/MfaValue.php
+++ b/app/Auth/Access/Mfa/MfaValue.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use BookStack\Auth\User;
+use Carbon\Carbon;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @property int    $id
+ * @property int    $user_id
+ * @property string $method
+ * @property string $value
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
+ */
+class MfaValue extends Model
+{
+    protected static $unguarded = true;
+
+    const METHOD_TOTP = 'totp';
+    const METHOD_BACKUP_CODES = 'backup_codes';
+
+    /**
+     * Get all the MFA methods available.
+     */
+    public static function allMethods(): array
+    {
+        return [self::METHOD_TOTP, self::METHOD_BACKUP_CODES];
+    }
+
+    /**
+     * Upsert a new MFA value for the given user and method
+     * using the provided value.
+     */
+    public static function upsertWithValue(User $user, string $method, string $value): void
+    {
+        /** @var MfaValue $mfaVal */
+        $mfaVal = static::query()->firstOrNew([
+            'user_id' => $user->id,
+            'method'  => $method,
+        ]);
+        $mfaVal->setValue($value);
+        $mfaVal->save();
+    }
+
+    /**
+     * Easily get the decrypted MFA value for the given user and method.
+     */
+    public static function getValueForUser(User $user, string $method): ?string
+    {
+        /** @var MfaValue $mfaVal */
+        $mfaVal = static::query()
+            ->where('user_id', '=', $user->id)
+            ->where('method', '=', $method)
+            ->first();
+
+        return $mfaVal ? $mfaVal->getValue() : null;
+    }
+
+    /**
+     * Decrypt the value attribute upon access.
+     */
+    protected function getValue(): string
+    {
+        return decrypt($this->value);
+    }
+
+    /**
+     * Encrypt the value attribute upon access.
+     */
+    protected function setValue($value): void
+    {
+        $this->value = encrypt($value);
+    }
+}
--- a/app/Auth/Access/Mfa/TotpService.php
+++ b/app/Auth/Access/Mfa/TotpService.php
@@ -0,0 +1,72 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use BaconQrCode\Renderer\Color\Rgb;
+use BaconQrCode\Renderer\Image\SvgImageBackEnd;
+use BaconQrCode\Renderer\ImageRenderer;
+use BaconQrCode\Renderer\RendererStyle\Fill;
+use BaconQrCode\Renderer\RendererStyle\RendererStyle;
+use BaconQrCode\Writer;
+use PragmaRX\Google2FA\Google2FA;
+use PragmaRX\Google2FA\Support\Constants;
+
+class TotpService
+{
+    protected $google2fa;
+
+    public function __construct(Google2FA $google2fa)
+    {
+        $this->google2fa = $google2fa;
+        // Use SHA1 as a default, Personal testing of other options in 2021 found
+        // many apps lack support for other algorithms yet still will scan
+        // the code causing a confusing UX.
+        $this->google2fa->setAlgorithm(Constants::SHA1);
+    }
+
+    /**
+     * Generate a new totp secret key.
+     */
+    public function generateSecret(): string
+    {
+        /** @noinspection PhpUnhandledExceptionInspection */
+        return $this->google2fa->generateSecretKey();
+    }
+
+    /**
+     * Generate a TOTP URL from secret key.
+     */
+    public function generateUrl(string $secret): string
+    {
+        return $this->google2fa->getQRCodeUrl(
+            setting('app-name'),
+            user()->email,
+            $secret
+        );
+    }
+
+    /**
+     * Generate a QR code to display a TOTP URL.
+     */
+    public function generateQrCodeSvg(string $url): string
+    {
+        $color = Fill::uniformColor(new Rgb(255, 255, 255), new Rgb(32, 110, 167));
+
+        return (new Writer(
+            new ImageRenderer(
+                new RendererStyle(192, 0, null, null, $color),
+                new SvgImageBackEnd()
+            )
+        ))->writeString($url);
+    }
+
+    /**
+     * Verify that the user provided code is valid for the secret.
+     * The secret must be known, not user-provided.
+     */
+    public function verifyCode(string $code, string $secret): bool
+    {
+        /** @noinspection PhpUnhandledExceptionInspection */
+        return $this->google2fa->verifyKey($secret, $code);
+    }
+}
--- a/app/Auth/Access/Mfa/TotpValidationRule.php
+++ b/app/Auth/Access/Mfa/TotpValidationRule.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use Illuminate\Contracts\Validation\Rule;
+
+class TotpValidationRule implements Rule
+{
+    protected $secret;
+    protected $totpService;
+
+    /**
+     * Create a new rule instance.
+     * Takes the TOTP secret that must be system provided, not user provided.
+     */
+    public function __construct(string $secret)
+    {
+        $this->secret = $secret;
+        $this->totpService = app()->make(TotpService::class);
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     */
+    public function passes($attribute, $value)
+    {
+        return $this->totpService->verifyCode($value, $this->secret);
+    }
+
+    /**
+     * Get the validation error message.
+     */
+    public function message()
+    {
+        return trans('validation.totp');
+    }
+}
--- a/app/Auth/Access/RegistrationService.php
+++ b/app/Auth/Access/RegistrationService.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Actions\ActivityType;
+use BookStack\Auth\SocialAccount;
+use BookStack\Auth\User;
+use BookStack\Auth\UserRepo;
+use BookStack\Exceptions\UserRegistrationException;
+use BookStack\Facades\Activity;
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
+use Exception;
+
+class RegistrationService
+{
+    protected $userRepo;
+    protected $emailConfirmationService;
+
+    /**
+     * RegistrationService constructor.
+     */
+    public function __construct(UserRepo $userRepo, EmailConfirmationService $emailConfirmationService)
+    {
+        $this->userRepo = $userRepo;
+        $this->emailConfirmationService = $emailConfirmationService;
+    }
+
+    /**
+     * Check whether or not registrations are allowed in the app settings.
+     *
+     * @throws UserRegistrationException
+     */
+    public function ensureRegistrationAllowed()
+    {
+        if (!$this->registrationAllowed()) {
+            throw new UserRegistrationException(trans('auth.registrations_disabled'), '/login');
+        }
+    }
+
+    /**
+     * Check if standard BookStack User registrations are currently allowed.
+     * Does not prevent external-auth based registration.
+     */
+    protected function registrationAllowed(): bool
+    {
+        $authMethod = config('auth.method');
+        $authMethodsWithRegistration = ['standard'];
+
+        return in_array($authMethod, $authMethodsWithRegistration) && setting('registration-enabled');
+    }
+
+    /**
+     * The registrations flow for all users.
+     *
+     * @throws UserRegistrationException
+     */
+    public function registerUser(array $userData, ?SocialAccount $socialAccount = null, bool $emailConfirmed = false): User
+    {
+        $userEmail = $userData['email'];
+
+        // Email restriction
+        $this->ensureEmailDomainAllowed($userEmail);
+
+        // Ensure user does not already exist
+        $alreadyUser = !is_null($this->userRepo->getByEmail($userEmail));
+        if ($alreadyUser) {
+            throw new UserRegistrationException(trans('errors.error_user_exists_different_creds', ['email' => $userEmail]), '/login');
+        }
+
+        // Create the user
+        $newUser = $this->userRepo->registerNew($userData, $emailConfirmed);
+
+        // Assign social account if given
+        if ($socialAccount) {
+            $newUser->socialAccounts()->save($socialAccount);
+        }
+
+        Activity::add(ActivityType::AUTH_REGISTER, $socialAccount ?? $newUser);
+        Theme::dispatch(ThemeEvents::AUTH_REGISTER, $socialAccount ? $socialAccount->driver : auth()->getDefaultDriver(), $newUser);
+
+        // Start email confirmation flow if required
+        if ($this->emailConfirmationService->confirmationRequired() && !$emailConfirmed) {
+            $newUser->save();
+
+            try {
+                $this->emailConfirmationService->sendConfirmation($newUser);
+                session()->flash('sent-email-confirmation', true);
+            } catch (Exception $e) {
+                $message = trans('auth.email_confirm_send_error');
+
+                throw new UserRegistrationException($message, '/register/confirm');
+            }
+        }
+
+        return $newUser;
+    }
+
+    /**
+     * Ensure that the given email meets any active email domain registration restrictions.
+     * Throws if restrictions are active and the email does not match an allowed domain.
+     *
+     * @throws UserRegistrationException
+     */
+    protected function ensureEmailDomainAllowed(string $userEmail): void
+    {
+        $registrationRestrict = setting('registration-restrict');
+
+        if (!$registrationRestrict) {
+            return;
+        }
+
+        $restrictedEmailDomains = explode(',', str_replace(' ', '', $registrationRestrict));
+        $userEmailDomain = $domain = mb_substr(mb_strrchr($userEmail, '@'), 1);
+        if (!in_array($userEmailDomain, $restrictedEmailDomains)) {
+            $redirect = $this->registrationAllowed() ? '/register' : '/login';
+
+            throw new UserRegistrationException(trans('auth.registration_email_domain_invalid'), $redirect);
+        }
+    }
+}
--- a/app/Auth/Access/Saml2Service.php
+++ b/app/Auth/Access/Saml2Service.php
@@ -0,0 +1,394 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\User;
+use BookStack\Exceptions\JsonDebugException;
+use BookStack\Exceptions\SamlException;
+use BookStack\Exceptions\StoppedAuthenticationException;
+use BookStack\Exceptions\UserRegistrationException;
+use Exception;
+use Illuminate\Support\Str;
+use OneLogin\Saml2\Auth;
+use OneLogin\Saml2\Error;
+use OneLogin\Saml2\IdPMetadataParser;
+use OneLogin\Saml2\ValidationError;
+
+/**
+ * Class Saml2Service
+ * Handles any app-specific SAML tasks.
+ */
+class Saml2Service extends ExternalAuthService
+{
+    protected $config;
+    protected $registrationService;
+    protected $loginService;
+
+    /**
+     * Saml2Service constructor.
+     */
+    public function __construct(RegistrationService $registrationService, LoginService $loginService)
+    {
+        $this->config = config('saml2');
+        $this->registrationService = $registrationService;
+        $this->loginService = $loginService;
+    }
+
+    /**
+     * Initiate a login flow.
+     *
+     * @throws Error
+     */
+    public function login(): array
+    {
+        $toolKit = $this->getToolkit();
+        $returnRoute = url('/saml2/acs');
+
+        return [
+            'url' => $toolKit->login($returnRoute, [], false, false, true),
+            'id'  => $toolKit->getLastRequestID(),
+        ];
+    }
+
+    /**
+     * Initiate a logout flow.
+     *
+     * @throws Error
+     */
+    public function logout(): array
+    {
+        $toolKit = $this->getToolkit();
+        $returnRoute = url('/');
+
+        try {
+            $url = $toolKit->logout($returnRoute, [], null, null, true);
+            $id = $toolKit->getLastRequestID();
+        } catch (Error $error) {
+            if ($error->getCode() !== Error::SAML_SINGLE_LOGOUT_NOT_SUPPORTED) {
+                throw $error;
+            }
+
+            $this->actionLogout();
+            $url = '/';
+            $id = null;
+        }
+
+        return ['url' => $url, 'id' => $id];
+    }
+
+    /**
+     * Process the ACS response from the idp and return the
+     * matching, or new if registration active, user matched to the idp.
+     * Returns null if not authenticated.
+     *
+     * @throws Error
+     * @throws SamlException
+     * @throws ValidationError
+     * @throws JsonDebugException
+     * @throws UserRegistrationException
+     */
+    public function processAcsResponse(?string $requestId): ?User
+    {
+        $toolkit = $this->getToolkit();
+        $toolkit->processResponse($requestId);
+        $errors = $toolkit->getErrors();
+
+        if (!empty($errors)) {
+            throw new Error(
+                'Invalid ACS Response: ' . implode(', ', $errors)
+            );
+        }
+
+        if (!$toolkit->isAuthenticated()) {
+            return null;
+        }
+
+        $attrs = $toolkit->getAttributes();
+        $id = $toolkit->getNameId();
+
+        return $this->processLoginCallback($id, $attrs);
+    }
+
+    /**
+     * Process a response for the single logout service.
+     *
+     * @throws Error
+     */
+    public function processSlsResponse(?string $requestId): ?string
+    {
+        $toolkit = $this->getToolkit();
+        $redirect = $toolkit->processSLO(true, $requestId, false, null, true);
+
+        $errors = $toolkit->getErrors();
+
+        if (!empty($errors)) {
+            throw new Error(
+                'Invalid SLS Response: ' . implode(', ', $errors)
+            );
+        }
+
+        $this->actionLogout();
+
+        return $redirect;
+    }
+
+    /**
+     * Do the required actions to log a user out.
+     */
+    protected function actionLogout()
+    {
+        auth()->logout();
+        session()->invalidate();
+    }
+
+    /**
+     * Get the metadata for this service provider.
+     *
+     * @throws Error
+     */
+    public function metadata(): string
+    {
+        $toolKit = $this->getToolkit();
+        $settings = $toolKit->getSettings();
+        $metadata = $settings->getSPMetadata();
+        $errors = $settings->validateMetadata($metadata);
+
+        if (!empty($errors)) {
+            throw new Error(
+                'Invalid SP metadata: ' . implode(', ', $errors),
+                Error::METADATA_SP_INVALID
+            );
+        }
+
+        return $metadata;
+    }
+
+    /**
+     * Load the underlying Onelogin SAML2 toolkit.
+     *
+     * @throws Error
+     * @throws Exception
+     */
+    protected function getToolkit(): Auth
+    {
+        $settings = $this->config['onelogin'];
+        $overrides = $this->config['onelogin_overrides'] ?? [];
+
+        if ($overrides && is_string($overrides)) {
+            $overrides = json_decode($overrides, true);
+        }
+
+        $metaDataSettings = [];
+        if ($this->config['autoload_from_metadata']) {
+            $metaDataSettings = IdPMetadataParser::parseRemoteXML($settings['idp']['entityId']);
+        }
+
+        $spSettings = $this->loadOneloginServiceProviderDetails();
+        $settings = array_replace_recursive($settings, $spSettings, $metaDataSettings, $overrides);
+
+        return new Auth($settings);
+    }
+
+    /**
+     * Load dynamic service provider options required by the onelogin toolkit.
+     */
+    protected function loadOneloginServiceProviderDetails(): array
+    {
+        $spDetails = [
+            'entityId'                 => url('/saml2/metadata'),
+            'assertionConsumerService' => [
+                'url' => url('/saml2/acs'),
+            ],
+            'singleLogoutService' => [
+                'url' => url('/saml2/sls'),
+            ],
+        ];
+
+        return [
+            'baseurl' => url('/saml2'),
+            'sp'      => $spDetails,
+        ];
+    }
+
+    /**
+     * Check if groups should be synced.
+     */
+    protected function shouldSyncGroups(): bool
+    {
+        return $this->config['user_to_groups'] !== false;
+    }
+
+    /**
+     * Calculate the display name.
+     */
+    protected function getUserDisplayName(array $samlAttributes, string $defaultValue): string
+    {
+        $displayNameAttr = $this->config['display_name_attributes'];
+
+        $displayName = [];
+        foreach ($displayNameAttr as $dnAttr) {
+            $dnComponent = $this->getSamlResponseAttribute($samlAttributes, $dnAttr, null);
+            if ($dnComponent !== null) {
+                $displayName[] = $dnComponent;
+            }
+        }
+
+        if (count($displayName) == 0) {
+            $displayName = $defaultValue;
+        } else {
+            $displayName = implode(' ', $displayName);
+        }
+
+        return $displayName;
+    }
+
+    /**
+     * Get the value to use as the external id saved in BookStack
+     * used to link the user to an existing BookStack DB user.
+     */
+    protected function getExternalId(array $samlAttributes, string $defaultValue)
+    {
+        $userNameAttr = $this->config['external_id_attribute'];
+        if ($userNameAttr === null) {
+            return $defaultValue;
+        }
+
+        return $this->getSamlResponseAttribute($samlAttributes, $userNameAttr, $defaultValue);
+    }
+
+    /**
+     * Extract the details of a user from a SAML response.
+     */
+    protected function getUserDetails(string $samlID, $samlAttributes): array
+    {
+        $emailAttr = $this->config['email_attribute'];
+        $externalId = $this->getExternalId($samlAttributes, $samlID);
+
+        $defaultEmail = filter_var($samlID, FILTER_VALIDATE_EMAIL) ? $samlID : null;
+        $email = $this->getSamlResponseAttribute($samlAttributes, $emailAttr, $defaultEmail);
+
+        return [
+            'external_id' => $externalId,
+            'name'        => $this->getUserDisplayName($samlAttributes, $externalId),
+            'email'       => $email,
+            'saml_id'     => $samlID,
+        ];
+    }
+
+    /**
+     * Get the groups a user is a part of from the SAML response.
+     */
+    public function getUserGroups(array $samlAttributes): array
+    {
+        $groupsAttr = $this->config['group_attribute'];
+        $userGroups = $samlAttributes[$groupsAttr] ?? null;
+
+        if (!is_array($userGroups)) {
+            $userGroups = [];
+        }
+
+        return $userGroups;
+    }
+
+    /**
+     *  For an array of strings, return a default for an empty array,
+     *  a string for an array with one element and the full array for
+     *  more than one element.
+     */
+    protected function simplifyValue(array $data, $defaultValue)
+    {
+        switch (count($data)) {
+            case 0:
+                $data = $defaultValue;
+                break;
+            case 1:
+                $data = $data[0];
+                break;
+        }
+
+        return $data;
+    }
+
+    /**
+     * Get a property from an SAML response.
+     * Handles properties potentially being an array.
+     */
+    protected function getSamlResponseAttribute(array $samlAttributes, string $propertyKey, $defaultValue)
+    {
+        if (isset($samlAttributes[$propertyKey])) {
+            return $this->simplifyValue($samlAttributes[$propertyKey], $defaultValue);
+        }
+
+        return $defaultValue;
+    }
+
+    /**
+     * Get the user from the database for the specified details.
+     *
+     * @throws UserRegistrationException
+     */
+    protected function getOrRegisterUser(array $userDetails): ?User
+    {
+        $user = User::query()
+          ->where('external_auth_id', '=', $userDetails['external_id'])
+          ->first();
+
+        if (is_null($user)) {
+            $userData = [
+                'name'             => $userDetails['name'],
+                'email'            => $userDetails['email'],
+                'password'         => Str::random(32),
+                'external_auth_id' => $userDetails['external_id'],
+            ];
+
+            $user = $this->registrationService->registerUser($userData, null, false);
+        }
+
+        return $user;
+    }
+
+    /**
+     * Process the SAML response for a user. Login the user when
+     * they exist, optionally registering them automatically.
+     *
+     * @throws SamlException
+     * @throws JsonDebugException
+     * @throws UserRegistrationException
+     * @throws StoppedAuthenticationException
+     */
+    public function processLoginCallback(string $samlID, array $samlAttributes): User
+    {
+        $userDetails = $this->getUserDetails($samlID, $samlAttributes);
+        $isLoggedIn = auth()->check();
+
+        if ($this->config['dump_user_details']) {
+            throw new JsonDebugException([
+                'id_from_idp'         => $samlID,
+                'attrs_from_idp'      => $samlAttributes,
+                'attrs_after_parsing' => $userDetails,
+            ]);
+        }
+
+        if ($userDetails['email'] === null) {
+            throw new SamlException(trans('errors.saml_no_email_address'));
+        }
+
+        if ($isLoggedIn) {
+            throw new SamlException(trans('errors.saml_already_logged_in'), '/login');
+        }
+
+        $user = $this->getOrRegisterUser($userDetails);
+        if ($user === null) {
+            throw new SamlException(trans('errors.saml_user_not_registered', ['name' => $userDetails['external_id']]), '/login');
+        }
+
+        if ($this->shouldSyncGroups()) {
+            $groups = $this->getUserGroups($samlAttributes);
+            $this->syncWithGroups($user, $groups);
+        }
+
+        $this->loginService->login($user, 'saml2');
+
+        return $user;
+    }
+}
--- a/app/Auth/Access/SocialAuthService.php
+++ b/app/Auth/Access/SocialAuthService.php
@@ -0,0 +1,317 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\SocialAccount;
+use BookStack\Auth\User;
+use BookStack\Exceptions\SocialDriverNotConfigured;
+use BookStack\Exceptions\SocialSignInAccountNotUsed;
+use BookStack\Exceptions\UserRegistrationException;
+use Illuminate\Support\Facades\Event;
+use Illuminate\Support\Str;
+use Laravel\Socialite\Contracts\Factory as Socialite;
+use Laravel\Socialite\Contracts\Provider;
+use Laravel\Socialite\Contracts\User as SocialUser;
+use SocialiteProviders\Manager\SocialiteWasCalled;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+
+class SocialAuthService
+{
+    /**
+     * The core socialite library used.
+     *
+     * @var Socialite
+     */
+    protected $socialite;
+
+    /**
+     * @var LoginService
+     */
+    protected $loginService;
+
+    /**
+     * The default built-in social drivers we support.
+     *
+     * @var string[]
+     */
+    protected $validSocialDrivers = [
+        'google',
+        'github',
+        'facebook',
+        'slack',
+        'twitter',
+        'azure',
+        'okta',
+        'gitlab',
+        'twitch',
+        'discord',
+    ];
+
+    /**
+     * Callbacks to run when configuring a social driver
+     * for an initial redirect action.
+     * Array is keyed by social driver name.
+     * Callbacks are passed an instance of the driver.
+     *
+     * @var array<string, callable>
+     */
+    protected $configureForRedirectCallbacks = [];
+
+    /**
+     * SocialAuthService constructor.
+     */
+    public function __construct(Socialite $socialite, LoginService $loginService)
+    {
+        $this->socialite = $socialite;
+        $this->loginService = $loginService;
+    }
+
+    /**
+     * Start the social login path.
+     *
+     * @throws SocialDriverNotConfigured
+     */
+    public function startLogIn(string $socialDriver): RedirectResponse
+    {
+        $driver = $this->validateDriver($socialDriver);
+
+        return $this->getDriverForRedirect($driver)->redirect();
+    }
+
+    /**
+     * Start the social registration process.
+     *
+     * @throws SocialDriverNotConfigured
+     */
+    public function startRegister(string $socialDriver): RedirectResponse
+    {
+        $driver = $this->validateDriver($socialDriver);
+
+        return $this->getDriverForRedirect($driver)->redirect();
+    }
+
+    /**
+     * Handle the social registration process on callback.
+     *
+     * @throws UserRegistrationException
+     */
+    public function handleRegistrationCallback(string $socialDriver, SocialUser $socialUser): SocialUser
+    {
+        // Check social account has not already been used
+        if (SocialAccount::query()->where('driver_id', '=', $socialUser->getId())->exists()) {
+            throw new UserRegistrationException(trans('errors.social_account_in_use', ['socialAccount' => $socialDriver]), '/login');
+        }
+
+        if (User::query()->where('email', '=', $socialUser->getEmail())->exists()) {
+            $email = $socialUser->getEmail();
+
+            throw new UserRegistrationException(trans('errors.error_user_exists_different_creds', ['email' => $email]), '/login');
+        }
+
+        return $socialUser;
+    }
+
+    /**
+     * Get the social user details via the social driver.
+     *
+     * @throws SocialDriverNotConfigured
+     */
+    public function getSocialUser(string $socialDriver): SocialUser
+    {
+        $driver = $this->validateDriver($socialDriver);
+
+        return $this->socialite->driver($driver)->user();
+    }
+
+    /**
+     * Handle the login process on a oAuth callback.
+     *
+     * @throws SocialSignInAccountNotUsed
+     */
+    public function handleLoginCallback(string $socialDriver, SocialUser $socialUser)
+    {
+        $socialId = $socialUser->getId();
+
+        // Get any attached social accounts or users
+        $socialAccount = SocialAccount::query()->where('driver_id', '=', $socialId)->first();
+        $isLoggedIn = auth()->check();
+        $currentUser = user();
+        $titleCaseDriver = Str::title($socialDriver);
+
+        // When a user is not logged in and a matching SocialAccount exists,
+        // Simply log the user into the application.
+        if (!$isLoggedIn && $socialAccount !== null) {
+            $this->loginService->login($socialAccount->user, $socialAccount);
+
+            return redirect()->intended('/');
+        }
+
+        // When a user is logged in but the social account does not exist,
+        // Create the social account and attach it to the user & redirect to the profile page.
+        if ($isLoggedIn && $socialAccount === null) {
+            $account = $this->newSocialAccount($socialDriver, $socialUser);
+            $currentUser->socialAccounts()->save($account);
+            session()->flash('success', trans('settings.users_social_connected', ['socialAccount' => $titleCaseDriver]));
+
+            return redirect($currentUser->getEditUrl());
+        }
+
+        // When a user is logged in and the social account exists and is already linked to the current user.
+        if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id === $currentUser->id) {
+            session()->flash('error', trans('errors.social_account_existing', ['socialAccount' => $titleCaseDriver]));
+
+            return redirect($currentUser->getEditUrl());
+        }
+
+        // When a user is logged in, A social account exists but the users do not match.
+        if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id != $currentUser->id) {
+            session()->flash('error', trans('errors.social_account_already_used_existing', ['socialAccount' => $titleCaseDriver]));
+
+            return redirect($currentUser->getEditUrl());
+        }
+
+        // Otherwise let the user know this social account is not used by anyone.
+        $message = trans('errors.social_account_not_used', ['socialAccount' => $titleCaseDriver]);
+        if (setting('registration-enabled') && config('auth.method') !== 'ldap' && config('auth.method') !== 'saml2') {
+            $message .= trans('errors.social_account_register_instructions', ['socialAccount' => $titleCaseDriver]);
+        }
+
+        throw new SocialSignInAccountNotUsed($message, '/login');
+    }
+
+    /**
+     * Ensure the social driver is correct and supported.
+     *
+     * @throws SocialDriverNotConfigured
+     */
+    protected function validateDriver(string $socialDriver): string
+    {
+        $driver = trim(strtolower($socialDriver));
+
+        if (!in_array($driver, $this->validSocialDrivers)) {
+            abort(404, trans('errors.social_driver_not_found'));
+        }
+
+        if (!$this->checkDriverConfigured($driver)) {
+            throw new SocialDriverNotConfigured(trans('errors.social_driver_not_configured', ['socialAccount' => Str::title($socialDriver)]));
+        }
+
+        return $driver;
+    }
+
+    /**
+     * Check a social driver has been configured correctly.
+     */
+    protected function checkDriverConfigured(string $driver): bool
+    {
+        $lowerName = strtolower($driver);
+        $configPrefix = 'services.' . $lowerName . '.';
+        $config = [config($configPrefix . 'client_id'), config($configPrefix . 'client_secret'), config('services.callback_url')];
+
+        return !in_array(false, $config) && !in_array(null, $config);
+    }
+
+    /**
+     * Gets the names of the active social drivers.
+     */
+    public function getActiveDrivers(): array
+    {
+        $activeDrivers = [];
+
+        foreach ($this->validSocialDrivers as $driverKey) {
+            if ($this->checkDriverConfigured($driverKey)) {
+                $activeDrivers[$driverKey] = $this->getDriverName($driverKey);
+            }
+        }
+
+        return $activeDrivers;
+    }
+
+    /**
+     * Get the presentational name for a driver.
+     */
+    public function getDriverName(string $driver): string
+    {
+        return config('services.' . strtolower($driver) . '.name');
+    }
+
+    /**
+     * Check if the current config for the given driver allows auto-registration.
+     */
+    public function driverAutoRegisterEnabled(string $driver): bool
+    {
+        return config('services.' . strtolower($driver) . '.auto_register') === true;
+    }
+
+    /**
+     * Check if the current config for the given driver allow email address auto-confirmation.
+     */
+    public function driverAutoConfirmEmailEnabled(string $driver): bool
+    {
+        return config('services.' . strtolower($driver) . '.auto_confirm') === true;
+    }
+
+    /**
+     * Fill and return a SocialAccount from the given driver name and SocialUser.
+     */
+    public function newSocialAccount(string $socialDriver, SocialUser $socialUser): SocialAccount
+    {
+        return new SocialAccount([
+            'driver'    => $socialDriver,
+            'driver_id' => $socialUser->getId(),
+            'avatar'    => $socialUser->getAvatar(),
+        ]);
+    }
+
+    /**
+     * Detach a social account from a user.
+     */
+    public function detachSocialAccount(string $socialDriver): void
+    {
+        user()->socialAccounts()->where('driver', '=', $socialDriver)->delete();
+    }
+
+    /**
+     * Provide redirect options per service for the Laravel Socialite driver.
+     */
+    protected function getDriverForRedirect(string $driverName): Provider
+    {
+        $driver = $this->socialite->driver($driverName);
+
+        if ($driverName === 'google' && config('services.google.select_account')) {
+            $driver->with(['prompt' => 'select_account']);
+        }
+        if ($driverName === 'azure') {
+            $driver->with(['resource' => 'https://graph.windows.net']);
+        }
+
+        if (isset($this->configureForRedirectCallbacks[$driverName])) {
+            $this->configureForRedirectCallbacks[$driverName]($driver);
+        }
+
+        return $driver;
+    }
+
+    /**
+     * Add a custom socialite driver to be used.
+     * Driver name should be lower_snake_case.
+     * Config array should mirror the structure of a service
+     * within the `Config/services.php` file.
+     * Handler should be a Class@method handler to the SocialiteWasCalled event.
+     */
+    public function addSocialDriver(
+        string $driverName,
+        array $config,
+        string $socialiteHandler,
+        callable $configureForRedirect = null
+    ) {
+        $this->validSocialDrivers[] = $driverName;
+        config()->set('services.' . $driverName, $config);
+        config()->set('services.' . $driverName . '.redirect', url('/login/service/' . $driverName . '/callback'));
+        config()->set('services.' . $driverName . '.name', $config['name'] ?? $driverName);
+        Event::listen(SocialiteWasCalled::class, $socialiteHandler);
+        if (!is_null($configureForRedirect)) {
+            $this->configureForRedirectCallbacks[$driverName] = $configureForRedirect;
+        }
+    }
+}
--- a/app/Auth/Access/UserInviteService.php
+++ b/app/Auth/Access/UserInviteService.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\User;
+use BookStack\Notifications\UserInvite;
+
+class UserInviteService extends UserTokenService
+{
+    protected $tokenTable = 'user_invites';
+    protected $expiryTime = 336; // Two weeks
+
+    /**
+     * Send an invitation to a user to sign into BookStack
+     * Removes existing invitation tokens.
+     *
+     * @param User $user
+     */
+    public function sendInvitation(User $user)
+    {
+        $this->deleteByUser($user);
+        $token = $this->createTokenForUser($user);
+        $user->notify(new UserInvite($token));
+    }
+}
--- a/app/Auth/Access/UserTokenService.php
+++ b/app/Auth/Access/UserTokenService.php
@@ -0,0 +1,142 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Auth\User;
+use BookStack\Exceptions\UserTokenExpiredException;
+use BookStack\Exceptions\UserTokenNotFoundException;
+use Carbon\Carbon;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Str;
+use stdClass;
+
+class UserTokenService
+{
+    /**
+     * Name of table where user tokens are stored.
+     *
+     * @var string
+     */
+    protected $tokenTable = 'user_tokens';
+
+    /**
+     * Token expiry time in hours.
+     *
+     * @var int
+     */
+    protected $expiryTime = 24;
+
+    /**
+     * Delete all email confirmations that belong to a user.
+     *
+     * @param User $user
+     *
+     * @return mixed
+     */
+    public function deleteByUser(User $user)
+    {
+        return DB::table($this->tokenTable)
+            ->where('user_id', '=', $user->id)
+            ->delete();
+    }
+
+    /**
+     * Get the user id from a token, while check the token exists and has not expired.
+     *
+     * @param string $token
+     *
+     * @throws UserTokenNotFoundException
+     * @throws UserTokenExpiredException
+     *
+     * @return int
+     */
+    public function checkTokenAndGetUserId(string $token): int
+    {
+        $entry = $this->getEntryByToken($token);
+
+        if (is_null($entry)) {
+            throw new UserTokenNotFoundException('Token "' . $token . '" not found');
+        }
+
+        if ($this->entryExpired($entry)) {
+            throw new UserTokenExpiredException("Token of id {$entry->id} has expired.", $entry->user_id);
+        }
+
+        return $entry->user_id;
+    }
+
+    /**
+     * Creates a unique token within the email confirmation database.
+     *
+     * @return string
+     */
+    protected function generateToken(): string
+    {
+        $token = Str::random(24);
+        while ($this->tokenExists($token)) {
+            $token = Str::random(25);
+        }
+
+        return $token;
+    }
+
+    /**
+     * Generate and store a token for the given user.
+     *
+     * @param User $user
+     *
+     * @return string
+     */
+    protected function createTokenForUser(User $user): string
+    {
+        $token = $this->generateToken();
+        DB::table($this->tokenTable)->insert([
+            'user_id'    => $user->id,
+            'token'      => $token,
+            'created_at' => Carbon::now(),
+            'updated_at' => Carbon::now(),
+        ]);
+
+        return $token;
+    }
+
+    /**
+     * Check if the given token exists.
+     *
+     * @param string $token
+     *
+     * @return bool
+     */
+    protected function tokenExists(string $token): bool
+    {
+        return DB::table($this->tokenTable)
+            ->where('token', '=', $token)->exists();
+    }
+
+    /**
+     * Get a token entry for the given token.
+     *
+     * @param string $token
+     *
+     * @return object|null
+     */
+    protected function getEntryByToken(string $token)
+    {
+        return DB::table($this->tokenTable)
+            ->where('token', '=', $token)
+            ->first();
+    }
+
+    /**
+     * Check if the given token entry has expired.
+     *
+     * @param stdClass $tokenEntry
+     *
+     * @return bool
+     */
+    protected function entryExpired(stdClass $tokenEntry): bool
+    {
+        return Carbon::now()->subHours($this->expiryTime)
+            ->gt(new Carbon($tokenEntry->created_at));
+    }
+}
--- a/app/Auth/Permissions/EntityPermission.php
+++ b/app/Auth/Permissions/EntityPermission.php
@@ -1,13 +1,17 @@
-<?php namespace BookStack;
+<?php
+
+namespace BookStack\Auth\Permissions;
+
+use BookStack\Model;

 class EntityPermission extends Model
 {
-
    protected $fillable = ['role_id', 'action'];
    public $timestamps = false;

    /**
     * Get all this restriction's attached entity.
+     *
     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
     */
    public function restrictable()
--- a/app/Auth/Permissions/JointPermission.php
+++ b/app/Auth/Permissions/JointPermission.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace BookStack\Auth\Permissions;
+
+use BookStack\Auth\Role;
+use BookStack\Entities\Models\Entity;
+use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\MorphOne;
+
+class JointPermission extends Model
+{
+    protected $primaryKey = null;
+    public $timestamps = false;
+
+    /**
+     * Get the role that this points to.
+     */
+    public function role(): BelongsTo
+    {
+        return $this->belongsTo(Role::class);
+    }
+
+    /**
+     * Get the entity this points to.
+     */
+    public function entity(): MorphOne
+    {
+        return $this->morphOne(Entity::class, 'entity');
+    }
+}
--- a/app/Auth/Permissions/PermissionService.php
+++ b/app/Auth/Permissions/PermissionService.php
@@ -0,0 +1,693 @@
+<?php
+
+namespace BookStack\Auth\Permissions;
+
+use BookStack\Auth\Role;
+use BookStack\Auth\User;
+use BookStack\Entities\Models\Book;
+use BookStack\Entities\Models\BookChild;
+use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Models\Chapter;
+use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\Page;
+use BookStack\Model;
+use BookStack\Traits\HasCreatorAndUpdater;
+use BookStack\Traits\HasOwner;
+use Illuminate\Database\Connection;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Collection as EloquentCollection;
+use Illuminate\Database\Query\Builder as QueryBuilder;
+use Throwable;
+
+class PermissionService
+{
+    /**
+     * @var ?array
+     */
+    protected $userRoles = null;
+
+    /**
+     * @var ?User
+     */
+    protected $currentUserModel = null;
+
+    /**
+     * @var Connection
+     */
+    protected $db;
+
+    /**
+     * @var array
+     */
+    protected $entityCache;
+
+    /**
+     * PermissionService constructor.
+     */
+    public function __construct(Connection $db)
+    {
+        $this->db = $db;
+    }
+
+    /**
+     * Set the database connection.
+     */
+    public function setConnection(Connection $connection)
+    {
+        $this->db = $connection;
+    }
+
+    /**
+     * Prepare the local entity cache and ensure it's empty.
+     *
+     * @param Entity[] $entities
+     */
+    protected function readyEntityCache(array $entities = [])
+    {
+        $this->entityCache = [];
+
+        foreach ($entities as $entity) {
+            $class = get_class($entity);
+            if (!isset($this->entityCache[$class])) {
+                $this->entityCache[$class] = collect();
+            }
+            $this->entityCache[$class]->put($entity->id, $entity);
+        }
+    }
+
+    /**
+     * Get a book via ID, Checks local cache.
+     */
+    protected function getBook(int $bookId): ?Book
+    {
+        if (isset($this->entityCache[Book::class]) && $this->entityCache[Book::class]->has($bookId)) {
+            return $this->entityCache[Book::class]->get($bookId);
+        }
+
+        return Book::query()->withTrashed()->find($bookId);
+    }
+
+    /**
+     * Get a chapter via ID, Checks local cache.
+     */
+    protected function getChapter(int $chapterId): ?Chapter
+    {
+        if (isset($this->entityCache[Chapter::class]) && $this->entityCache[Chapter::class]->has($chapterId)) {
+            return $this->entityCache[Chapter::class]->get($chapterId);
+        }
+
+        return Chapter::query()
+            ->withTrashed()
+            ->find($chapterId);
+    }
+
+    /**
+     * Get the roles for the current logged in user.
+     */
+    protected function getCurrentUserRoles(): array
+    {
+        if (!is_null($this->userRoles)) {
+            return $this->userRoles;
+        }
+
+        if (auth()->guest()) {
+            $this->userRoles = [Role::getSystemRole('public')->id];
+        } else {
+            $this->userRoles = $this->currentUser()->roles->pluck('id')->values()->all();
+        }
+
+        return $this->userRoles;
+    }
+
+    /**
+     * Re-generate all entity permission from scratch.
+     */
+    public function buildJointPermissions()
+    {
+        JointPermission::query()->truncate();
+        $this->readyEntityCache();
+
+        // Get all roles (Should be the most limited dimension)
+        $roles = Role::query()->with('permissions')->get()->all();
+
+        // Chunk through all books
+        $this->bookFetchQuery()->chunk(5, function (EloquentCollection $books) use ($roles) {
+            $this->buildJointPermissionsForBooks($books, $roles);
+        });
+
+        // Chunk through all bookshelves
+        Bookshelf::query()->withTrashed()->select(['id', 'restricted', 'owned_by'])
+            ->chunk(50, function (EloquentCollection $shelves) use ($roles) {
+                $this->buildJointPermissionsForShelves($shelves, $roles);
+            });
+    }
+
+    /**
+     * Get a query for fetching a book with it's children.
+     */
+    protected function bookFetchQuery(): Builder
+    {
+        return Book::query()->withTrashed()
+            ->select(['id', 'restricted', 'owned_by'])->with([
+                'chapters' => function ($query) {
+                    $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id']);
+                },
+                'pages' => function ($query) {
+                    $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id', 'chapter_id']);
+                },
+            ]);
+    }
+
+    /**
+     * Build joint permissions for the given shelf and role combinations.
+     *
+     * @throws Throwable
+     */
+    protected function buildJointPermissionsForShelves(EloquentCollection $shelves, array $roles, bool $deleteOld = false)
+    {
+        if ($deleteOld) {
+            $this->deleteManyJointPermissionsForEntities($shelves->all());
+        }
+        $this->createManyJointPermissions($shelves->all(), $roles);
+    }
+
+    /**
+     * Build joint permissions for the given book and role combinations.
+     *
+     * @throws Throwable
+     */
+    protected function buildJointPermissionsForBooks(EloquentCollection $books, array $roles, bool $deleteOld = false)
+    {
+        $entities = clone $books;
+
+        /** @var Book $book */
+        foreach ($books->all() as $book) {
+            foreach ($book->getRelation('chapters') as $chapter) {
+                $entities->push($chapter);
+            }
+            foreach ($book->getRelation('pages') as $page) {
+                $entities->push($page);
+            }
+        }
+
+        if ($deleteOld) {
+            $this->deleteManyJointPermissionsForEntities($entities->all());
+        }
+        $this->createManyJointPermissions($entities->all(), $roles);
+    }
+
+    /**
+     * Rebuild the entity jointPermissions for a particular entity.
+     *
+     * @throws Throwable
+     */
+    public function buildJointPermissionsForEntity(Entity $entity)
+    {
+        $entities = [$entity];
+        if ($entity instanceof Book) {
+            $books = $this->bookFetchQuery()->where('id', '=', $entity->id)->get();
+            $this->buildJointPermissionsForBooks($books, Role::query()->get()->all(), true);
+
+            return;
+        }
+
+        /** @var BookChild $entity */
+        if ($entity->book) {
+            $entities[] = $entity->book;
+        }
+
+        if ($entity instanceof Page && $entity->chapter_id) {
+            $entities[] = $entity->chapter;
+        }
+
+        if ($entity instanceof Chapter) {
+            foreach ($entity->pages as $page) {
+                $entities[] = $page;
+            }
+        }
+
+        $this->buildJointPermissionsForEntities($entities);
+    }
+
+    /**
+     * Rebuild the entity jointPermissions for a collection of entities.
+     *
+     * @throws Throwable
+     */
+    public function buildJointPermissionsForEntities(array $entities)
+    {
+        $roles = Role::query()->get()->values()->all();
+        $this->deleteManyJointPermissionsForEntities($entities);
+        $this->createManyJointPermissions($entities, $roles);
+    }
+
+    /**
+     * Build the entity jointPermissions for a particular role.
+     */
+    public function buildJointPermissionForRole(Role $role)
+    {
+        $roles = [$role];
+        $this->deleteManyJointPermissionsForRoles($roles);
+
+        // Chunk through all books
+        $this->bookFetchQuery()->chunk(20, function ($books) use ($roles) {
+            $this->buildJointPermissionsForBooks($books, $roles);
+        });
+
+        // Chunk through all bookshelves
+        Bookshelf::query()->select(['id', 'restricted', 'owned_by'])
+            ->chunk(50, function ($shelves) use ($roles) {
+                $this->buildJointPermissionsForShelves($shelves, $roles);
+            });
+    }
+
+    /**
+     * Delete the entity jointPermissions attached to a particular role.
+     */
+    public function deleteJointPermissionsForRole(Role $role)
+    {
+        $this->deleteManyJointPermissionsForRoles([$role]);
+    }
+
+    /**
+     * Delete all of the entity jointPermissions for a list of entities.
+     *
+     * @param Role[] $roles
+     */
+    protected function deleteManyJointPermissionsForRoles($roles)
+    {
+        $roleIds = array_map(function ($role) {
+            return $role->id;
+        }, $roles);
+        JointPermission::query()->whereIn('role_id', $roleIds)->delete();
+    }
+
+    /**
+     * Delete the entity jointPermissions for a particular entity.
+     *
+     * @param Entity $entity
+     *
+     * @throws Throwable
+     */
+    public function deleteJointPermissionsForEntity(Entity $entity)
+    {
+        $this->deleteManyJointPermissionsForEntities([$entity]);
+    }
+
+    /**
+     * Delete all of the entity jointPermissions for a list of entities.
+     *
+     * @param Entity[] $entities
+     *
+     * @throws Throwable
+     */
+    protected function deleteManyJointPermissionsForEntities(array $entities)
+    {
+        if (count($entities) === 0) {
+            return;
+        }
+
+        $this->db->transaction(function () use ($entities) {
+            foreach (array_chunk($entities, 1000) as $entityChunk) {
+                $query = $this->db->table('joint_permissions');
+                foreach ($entityChunk as $entity) {
+                    $query->orWhere(function (QueryBuilder $query) use ($entity) {
+                        $query->where('entity_id', '=', $entity->id)
+                            ->where('entity_type', '=', $entity->getMorphClass());
+                    });
+                }
+                $query->delete();
+            }
+        });
+    }
+
+    /**
+     * Create & Save entity jointPermissions for many entities and roles.
+     *
+     * @param Entity[] $entities
+     * @param Role[]   $roles
+     *
+     * @throws Throwable
+     */
+    protected function createManyJointPermissions(array $entities, array $roles)
+    {
+        $this->readyEntityCache($entities);
+        $jointPermissions = [];
+
+        // Fetch Entity Permissions and create a mapping of entity restricted statuses
+        $entityRestrictedMap = [];
+        $permissionFetch = EntityPermission::query();
+        foreach ($entities as $entity) {
+            $entityRestrictedMap[$entity->getMorphClass() . ':' . $entity->id] = boolval($entity->getRawAttribute('restricted'));
+            $permissionFetch->orWhere(function ($query) use ($entity) {
+                $query->where('restrictable_id', '=', $entity->id)->where('restrictable_type', '=', $entity->getMorphClass());
+            });
+        }
+        $permissions = $permissionFetch->get();
+
+        // Create a mapping of explicit entity permissions
+        $permissionMap = [];
+        foreach ($permissions as $permission) {
+            $key = $permission->restrictable_type . ':' . $permission->restrictable_id . ':' . $permission->role_id . ':' . $permission->action;
+            $isRestricted = $entityRestrictedMap[$permission->restrictable_type . ':' . $permission->restrictable_id];
+            $permissionMap[$key] = $isRestricted;
+        }
+
+        // Create a mapping of role permissions
+        $rolePermissionMap = [];
+        foreach ($roles as $role) {
+            foreach ($role->permissions as $permission) {
+                $rolePermissionMap[$role->getRawAttribute('id') . ':' . $permission->getRawAttribute('name')] = true;
+            }
+        }
+
+        // Create Joint Permission Data
+        foreach ($entities as $entity) {
+            foreach ($roles as $role) {
+                foreach ($this->getActions($entity) as $action) {
+                    $jointPermissions[] = $this->createJointPermissionData($entity, $role, $action, $permissionMap, $rolePermissionMap);
+                }
+            }
+        }
+
+        $this->db->transaction(function () use ($jointPermissions) {
+            foreach (array_chunk($jointPermissions, 1000) as $jointPermissionChunk) {
+                $this->db->table('joint_permissions')->insert($jointPermissionChunk);
+            }
+        });
+    }
+
+    /**
+     * Get the actions related to an entity.
+     */
+    protected function getActions(Entity $entity): array
+    {
+        $baseActions = ['view', 'update', 'delete'];
+        if ($entity instanceof Chapter || $entity instanceof Book) {
+            $baseActions[] = 'page-create';
+        }
+        if ($entity instanceof Book) {
+            $baseActions[] = 'chapter-create';
+        }
+
+        return $baseActions;
+    }
+
+    /**
+     * Create entity permission data for an entity and role
+     * for a particular action.
+     */
+    protected function createJointPermissionData(Entity $entity, Role $role, string $action, array $permissionMap, array $rolePermissionMap): array
+    {
+        $permissionPrefix = (strpos($action, '-') === false ? ($entity->getType() . '-') : '') . $action;
+        $roleHasPermission = isset($rolePermissionMap[$role->getRawAttribute('id') . ':' . $permissionPrefix . '-all']);
+        $roleHasPermissionOwn = isset($rolePermissionMap[$role->getRawAttribute('id') . ':' . $permissionPrefix . '-own']);
+        $explodedAction = explode('-', $action);
+        $restrictionAction = end($explodedAction);
+
+        if ($role->system_name === 'admin') {
+            return $this->createJointPermissionDataArray($entity, $role, $action, true, true);
+        }
+
+        if ($entity->restricted) {
+            $hasAccess = $this->mapHasActiveRestriction($permissionMap, $entity, $role, $restrictionAction);
+
+            return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
+        }
+
+        if ($entity instanceof Book || $entity instanceof Bookshelf) {
+            return $this->createJointPermissionDataArray($entity, $role, $action, $roleHasPermission, $roleHasPermissionOwn);
+        }
+
+        // For chapters and pages, Check if explicit permissions are set on the Book.
+        $book = $this->getBook($entity->book_id);
+        $hasExplicitAccessToParents = $this->mapHasActiveRestriction($permissionMap, $book, $role, $restrictionAction);
+        $hasPermissiveAccessToParents = !$book->restricted;
+
+        // For pages with a chapter, Check if explicit permissions are set on the Chapter
+        if ($entity instanceof Page && intval($entity->chapter_id) !== 0) {
+            $chapter = $this->getChapter($entity->chapter_id);
+            $hasPermissiveAccessToParents = $hasPermissiveAccessToParents && !$chapter->restricted;
+            if ($chapter->restricted) {
+                $hasExplicitAccessToParents = $this->mapHasActiveRestriction($permissionMap, $chapter, $role, $restrictionAction);
+            }
+        }
+
+        return $this->createJointPermissionDataArray(
+            $entity,
+            $role,
+            $action,
+            ($hasExplicitAccessToParents || ($roleHasPermission && $hasPermissiveAccessToParents)),
+            ($hasExplicitAccessToParents || ($roleHasPermissionOwn && $hasPermissiveAccessToParents))
+        );
+    }
+
+    /**
+     * Check for an active restriction in an entity map.
+     */
+    protected function mapHasActiveRestriction(array $entityMap, Entity $entity, Role $role, string $action): bool
+    {
+        $key = $entity->getMorphClass() . ':' . $entity->getRawAttribute('id') . ':' . $role->getRawAttribute('id') . ':' . $action;
+
+        return $entityMap[$key] ?? false;
+    }
+
+    /**
+     * Create an array of data with the information of an entity jointPermissions.
+     * Used to build data for bulk insertion.
+     */
+    protected function createJointPermissionDataArray(Entity $entity, Role $role, string $action, bool $permissionAll, bool $permissionOwn): array
+    {
+        return [
+            'role_id'            => $role->getRawAttribute('id'),
+            'entity_id'          => $entity->getRawAttribute('id'),
+            'entity_type'        => $entity->getMorphClass(),
+            'action'             => $action,
+            'has_permission'     => $permissionAll,
+            'has_permission_own' => $permissionOwn,
+            'owned_by'           => $entity->getRawAttribute('owned_by'),
+        ];
+    }
+
+    /**
+     * Checks if an entity has a restriction set upon it.
+     *
+     * @param HasCreatorAndUpdater|HasOwner $ownable
+     */
+    public function checkOwnableUserAccess(Model $ownable, string $permission): bool
+    {
+        $explodedPermission = explode('-', $permission);
+
+        $baseQuery = $ownable->newQuery()->where('id', '=', $ownable->id);
+        $action = end($explodedPermission);
+        $user = $this->currentUser();
+
+        $nonJointPermissions = ['restrictions', 'image', 'attachment', 'comment'];
+
+        // Handle non entity specific jointPermissions
+        if (in_array($explodedPermission[0], $nonJointPermissions)) {
+            $allPermission = $user && $user->can($permission . '-all');
+            $ownPermission = $user && $user->can($permission . '-own');
+            $ownerField = ($ownable instanceof Entity) ? 'owned_by' : 'created_by';
+            $isOwner = $user && $user->id === $ownable->$ownerField;
+
+            return $allPermission || ($isOwner && $ownPermission);
+        }
+
+        // Handle abnormal create jointPermissions
+        if ($action === 'create') {
+            $action = $permission;
+        }
+
+        $hasAccess = $this->entityRestrictionQuery($baseQuery, $action)->count() > 0;
+        $this->clean();
+
+        return $hasAccess;
+    }
+
+    /**
+     * Checks if a user has the given permission for any items in the system.
+     * Can be passed an entity instance to filter on a specific type.
+     */
+    public function checkUserHasPermissionOnAnything(string $permission, ?string $entityClass = null): bool
+    {
+        $userRoleIds = $this->currentUser()->roles()->select('id')->pluck('id')->toArray();
+        $userId = $this->currentUser()->id;
+
+        $permissionQuery = JointPermission::query()
+            ->where('action', '=', $permission)
+            ->whereIn('role_id', $userRoleIds)
+            ->where(function (Builder $query) use ($userId) {
+                $this->addJointHasPermissionCheck($query, $userId);
+            });
+
+        if (!is_null($entityClass)) {
+            $entityInstance = app($entityClass);
+            $permissionQuery = $permissionQuery->where('entity_type', '=', $entityInstance->getMorphClass());
+        }
+
+        $hasPermission = $permissionQuery->count() > 0;
+        $this->clean();
+
+        return $hasPermission;
+    }
+
+    /**
+     * The general query filter to remove all entities
+     * that the current user does not have access to.
+     */
+    protected function entityRestrictionQuery(Builder $query, string $action): Builder
+    {
+        $q = $query->where(function ($parentQuery) use ($action) {
+            $parentQuery->whereHas('jointPermissions', function ($permissionQuery) use ($action) {
+                $permissionQuery->whereIn('role_id', $this->getCurrentUserRoles())
+                    ->where('action', '=', $action)
+                    ->where(function (Builder $query) {
+                        $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
+                    });
+            });
+        });
+
+        $this->clean();
+
+        return $q;
+    }
+
+    /**
+     * Limited the given entity query so that the query will only
+     * return items that the user has permission for the given ability.
+     */
+    public function restrictEntityQuery(Builder $query, string $ability = 'view'): Builder
+    {
+        $this->clean();
+
+        return $query->where(function (Builder $parentQuery) use ($ability) {
+            $parentQuery->whereHas('jointPermissions', function (Builder $permissionQuery) use ($ability) {
+                $permissionQuery->whereIn('role_id', $this->getCurrentUserRoles())
+                    ->where('action', '=', $ability)
+                    ->where(function (Builder $query) {
+                        $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
+                    });
+            });
+        });
+    }
+
+    /**
+     * Extend the given page query to ensure draft items are not visible
+     * unless created by the given user.
+     */
+    public function enforceDraftVisibilityOnQuery(Builder $query): Builder
+    {
+        return $query->where(function (Builder $query) {
+            $query->where('draft', '=', false)
+                ->orWhere(function (Builder $query) {
+                    $query->where('draft', '=', true)
+                        ->where('owned_by', '=', $this->currentUser()->id);
+                });
+        });
+    }
+
+    /**
+     * Add restrictions for a generic entity.
+     */
+    public function enforceEntityRestrictions(Entity $entity, Builder $query, string $action = 'view'): Builder
+    {
+        if ($entity instanceof Page) {
+            // Prevent drafts being visible to others.
+            $this->enforceDraftVisibilityOnQuery($query);
+        }
+
+        return $this->entityRestrictionQuery($query, $action);
+    }
+
+    /**
+     * Filter items that have entities set as a polymorphic relation.
+     *
+     * @param Builder|\Illuminate\Database\Query\Builder $query
+     */
+    public function filterRestrictedEntityRelations($query, string $tableName, string $entityIdColumn, string $entityTypeColumn, string $action = 'view')
+    {
+        $tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn, 'entityTypeColumn' => $entityTypeColumn];
+
+        $q = $query->where(function ($query) use ($tableDetails, $action) {
+            $query->whereExists(function ($permissionQuery) use (&$tableDetails, $action) {
+                $permissionQuery->select(['role_id'])->from('joint_permissions')
+                    ->whereRaw('joint_permissions.entity_id=' . $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
+                    ->whereRaw('joint_permissions.entity_type=' . $tableDetails['tableName'] . '.' . $tableDetails['entityTypeColumn'])
+                    ->where('action', '=', $action)
+                    ->whereIn('role_id', $this->getCurrentUserRoles())
+                    ->where(function (QueryBuilder $query) {
+                        $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
+                    });
+            });
+        });
+
+        $this->clean();
+
+        return $q;
+    }
+
+    /**
+     * Add conditions to a query to filter the selection to related entities
+     * where view permissions are granted.
+     */
+    public function filterRelatedEntity(string $entityClass, Builder $query, string $tableName, string $entityIdColumn): Builder
+    {
+        $tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn];
+        $morphClass = app($entityClass)->getMorphClass();
+
+        $q = $query->where(function ($query) use ($tableDetails, $morphClass) {
+            $query->where(function ($query) use (&$tableDetails, $morphClass) {
+                $query->whereExists(function ($permissionQuery) use (&$tableDetails, $morphClass) {
+                    $permissionQuery->select('id')->from('joint_permissions')
+                        ->whereRaw('joint_permissions.entity_id=' . $tableDetails['tableName'] . '.' . $tableDetails['entityIdColumn'])
+                        ->where('entity_type', '=', $morphClass)
+                        ->where('action', '=', 'view')
+                        ->whereIn('role_id', $this->getCurrentUserRoles())
+                        ->where(function (QueryBuilder $query) {
+                            $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
+                        });
+                });
+            })->orWhere($tableDetails['entityIdColumn'], '=', 0);
+        });
+
+        $this->clean();
+
+        return $q;
+    }
+
+    /**
+     * Add the query for checking the given user id has permission
+     * within the join_permissions table.
+     *
+     * @param QueryBuilder|Builder $query
+     */
+    protected function addJointHasPermissionCheck($query, int $userIdToCheck)
+    {
+        $query->where('has_permission', '=', true)->orWhere(function ($query) use ($userIdToCheck) {
+            $query->where('has_permission_own', '=', true)
+                ->where('owned_by', '=', $userIdToCheck);
+        });
+    }
+
+    /**
+     * Get the current user.
+     */
+    private function currentUser(): User
+    {
+        if (is_null($this->currentUserModel)) {
+            $this->currentUserModel = user();
+        }
+
+        return $this->currentUserModel;
+    }
+
+    /**
+     * Clean the cached user elements.
+     */
+    private function clean(): void
+    {
+        $this->currentUserModel = null;
+        $this->userRoles = null;
+    }
+}
--- a/app/Auth/Permissions/PermissionsRepo.php
+++ b/app/Auth/Permissions/PermissionsRepo.php
@@ -1,14 +1,16 @@
-<?php namespace BookStack\Repos;
+<?php

+namespace BookStack\Auth\Permissions;
+
+use BookStack\Actions\ActivityType;
+use BookStack\Auth\Role;
 use BookStack\Exceptions\PermissionsException;
-use BookStack\RolePermission;
-use BookStack\Role;
-use BookStack\Services\PermissionService;
-use Setting;
+use BookStack\Facades\Activity;
+use Exception;
+use Illuminate\Database\Eloquent\Collection;

 class PermissionsRepo
 {
-
    protected $permission;
    protected $role;
    protected $permissionService;
@@ -17,9 +19,6 @@ class PermissionsRepo

    /**
     * PermissionsRepo constructor.
-     * @param RolePermission $permission
-     * @param Role $role
-     * @param PermissionService $permissionService
     */
    public function __construct(RolePermission $permission, Role $role, PermissionService $permissionService)
    {
@@ -30,90 +29,89 @@ class PermissionsRepo

    /**
     * Get all the user roles from the system.
-     * @return \Illuminate\Database\Eloquent\Collection|static[]
     */
-    public function getAllRoles()
+    public function getAllRoles(): Collection
    {
        return $this->role->all();
    }

    /**
     * Get all the roles except for the provided one.
-     * @param Role $role
-     * @return mixed
     */
-    public function getAllRolesExcept(Role $role)
+    public function getAllRolesExcept(Role $role): Collection
    {
        return $this->role->where('id', '!=', $role->id)->get();
    }

    /**
     * Get a role via its ID.
-     * @param $id
-     * @return mixed
     */
-    public function getRoleById($id)
+    public function getRoleById($id): Role
    {
-        return $this->role->findOrFail($id);
+        return $this->role->newQuery()->findOrFail($id);
    }

    /**
     * Save a new role into the system.
-     * @param array $roleData
-     * @return Role
     */
-    public function saveNewRole($roleData)
+    public function saveNewRole(array $roleData): Role
    {
        $role = $this->role->newInstance($roleData);
-        $role->name = str_replace(' ', '-', strtolower($roleData['display_name']));
-        // Prevent duplicate names
-        while ($this->role->where('name', '=', $role->name)->count() > 0) {
-            $role->name .= strtolower(str_random(2));
-        }
+        $role->mfa_enforced = ($roleData['mfa_enforced'] ?? 'false') === 'true';
        $role->save();

        $permissions = isset($roleData['permissions']) ? array_keys($roleData['permissions']) : [];
        $this->assignRolePermissions($role, $permissions);
        $this->permissionService->buildJointPermissionForRole($role);
+        Activity::add(ActivityType::ROLE_CREATE, $role);
+
        return $role;
    }

    /**
     * Updates an existing role.
-     * Ensure Admin role always has all permissions.
-     * @param $roleId
-     * @param $roleData
-     * @throws PermissionsException
+     * Ensure Admin role always have core permissions.
     */
-    public function updateRole($roleId, $roleData)
+    public function updateRole($roleId, array $roleData)
    {
-        $role = $this->role->findOrFail($roleId);
+        /** @var Role $role */
+        $role = $this->role->newQuery()->findOrFail($roleId);

        $permissions = isset($roleData['permissions']) ? array_keys($roleData['permissions']) : [];
-        $this->assignRolePermissions($role, $permissions);
-
        if ($role->system_name === 'admin') {
-            $permissions = $this->permission->all()->pluck('id')->toArray();
-            $role->permissions()->sync($permissions);
+            $permissions = array_merge($permissions, [
+                'users-manage',
+                'user-roles-manage',
+                'restrictions-manage-all',
+                'restrictions-manage-own',
+                'settings-manage',
+            ]);
        }

+        $this->assignRolePermissions($role, $permissions);
+
        $role->fill($roleData);
+        $role->mfa_enforced = ($roleData['mfa_enforced'] ?? 'false') === 'true';
        $role->save();
        $this->permissionService->buildJointPermissionForRole($role);
+        Activity::add(ActivityType::ROLE_UPDATE, $role);
    }

    /**
     * Assign an list of permission names to an role.
-     * @param Role $role
-     * @param array $permissionNameArray
     */
-    public function assignRolePermissions(Role $role, $permissionNameArray = [])
+    protected function assignRolePermissions(Role $role, array $permissionNameArray = [])
    {
        $permissions = [];
        $permissionNameArray = array_values($permissionNameArray);
-        if ($permissionNameArray && count($permissionNameArray) > 0) {
-            $permissions = $this->permission->whereIn('name', $permissionNameArray)->pluck('id')->toArray();
+
+        if ($permissionNameArray) {
+            $permissions = $this->permission->newQuery()
+                ->whereIn('name', $permissionNameArray)
+                ->pluck('id')
+                ->toArray();
        }
+
        $role->permissions()->sync($permissions);
    }

@@ -122,30 +120,32 @@ class PermissionsRepo
     * Check it's not an admin role or set as default before deleting.
     * If an migration Role ID is specified the users assign to the current role
     * will be added to the role of the specified id.
-     * @param $roleId
-     * @param $migrateRoleId
+     *
     * @throws PermissionsException
+     * @throws Exception
     */
    public function deleteRole($roleId, $migrateRoleId)
    {
-        $role = $this->role->findOrFail($roleId);
+        /** @var Role $role */
+        $role = $this->role->newQuery()->findOrFail($roleId);

        // Prevent deleting admin role or default registration role.
        if ($role->system_name && in_array($role->system_name, $this->systemRoles)) {
            throw new PermissionsException(trans('errors.role_system_cannot_be_deleted'));
-        } else if ($role->id == setting('registration-role')) {
+        } elseif ($role->id === intval(setting('registration-role'))) {
            throw new PermissionsException(trans('errors.role_registration_default_cannot_delete'));
        }

        if ($migrateRoleId) {
-            $newRole = $this->role->find($migrateRoleId);
+            $newRole = $this->role->newQuery()->find($migrateRoleId);
            if ($newRole) {
-                $users = $role->users->pluck('id')->toArray();
+                $users = $role->users()->pluck('id')->toArray();
                $newRole->users()->sync($users);
            }
        }

        $this->permissionService->deleteJointPermissionsForRole($role);
+        Activity::add(ActivityType::ROLE_DELETE, $role);
        $role->delete();
    }
 }
--- a/app/Auth/Permissions/RolePermission.php
+++ b/app/Auth/Permissions/RolePermission.php
@@ -1,5 +1,13 @@
-<?php namespace BookStack;
+<?php

+namespace BookStack\Auth\Permissions;
+
+use BookStack\Auth\Role;
+use BookStack\Model;
+
+/**
+ * @property int $id
+ */
 class RolePermission extends Model
 {
    /**
@@ -12,7 +20,9 @@ class RolePermission extends Model

    /**
     * Get the permission object by name.
+     *
     * @param $name
+     *
     * @return mixed
     */
    public static function getByName($name)
--- a/app/Auth/Role.php
+++ b/app/Auth/Role.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace BookStack\Auth;
+
+use BookStack\Auth\Permissions\JointPermission;
+use BookStack\Auth\Permissions\RolePermission;
+use BookStack\Interfaces\Loggable;
+use BookStack\Model;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+/**
+ * Class Role.
+ *
+ * @property int    $id
+ * @property string $display_name
+ * @property string $description
+ * @property string $external_auth_id
+ * @property string $system_name
+ * @property bool   $mfa_enforced
+ */
+class Role extends Model implements Loggable
+{
+    protected $fillable = ['display_name', 'description', 'external_auth_id'];
+
+    /**
+     * The roles that belong to the role.
+     */
+    public function users(): BelongsToMany
+    {
+        return $this->belongsToMany(User::class)->orderBy('name', 'asc');
+    }
+
+    /**
+     * Get all related JointPermissions.
+     */
+    public function jointPermissions(): HasMany
+    {
+        return $this->hasMany(JointPermission::class);
+    }
+
+    /**
+     * The RolePermissions that belong to the role.
+     */
+    public function permissions(): BelongsToMany
+    {
+        return $this->belongsToMany(RolePermission::class, 'permission_role', 'role_id', 'permission_id');
+    }
+
+    /**
+     * Check if this role has a permission.
+     */
+    public function hasPermission(string $permissionName): bool
+    {
+        $permissions = $this->getRelationValue('permissions');
+        foreach ($permissions as $permission) {
+            if ($permission->getRawAttribute('name') === $permissionName) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Add a permission to this role.
+     */
+    public function attachPermission(RolePermission $permission)
+    {
+        $this->permissions()->attach($permission->id);
+    }
+
+    /**
+     * Detach a single permission from this role.
+     */
+    public function detachPermission(RolePermission $permission)
+    {
+        $this->permissions()->detach([$permission->id]);
+    }
+
+    /**
+     * Get the role of the specified display name.
+     */
+    public static function getRole(string $displayName): ?Role
+    {
+        return static::query()->where('display_name', '=', $displayName)->first();
+    }
+
+    /**
+     * Get the role object for the specified system role.
+     */
+    public static function getSystemRole(string $systemName): ?Role
+    {
+        return static::query()->where('system_name', '=', $systemName)->first();
+    }
+
+    /**
+     * Get all visible roles.
+     */
+    public static function visible(): Collection
+    {
+        return static::query()->where('hidden', '=', false)->orderBy('name')->get();
+    }
+
+    /**
+     * Get the roles that can be restricted.
+     */
+    public static function restrictable(): Collection
+    {
+        return static::query()
+            ->where('system_name', '!=', 'admin')
+            ->orderBy('display_name', 'asc')
+            ->get();
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function logDescriptor(): string
+    {
+        return "({$this->id}) {$this->display_name}";
+    }
+}
--- a/app/Auth/SocialAccount.php
+++ b/app/Auth/SocialAccount.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace BookStack\Auth;
+
+use BookStack\Interfaces\Loggable;
+use BookStack\Model;
+
+/**
+ * Class SocialAccount.
+ *
+ * @property string $driver
+ * @property User   $user
+ */
+class SocialAccount extends Model implements Loggable
+{
+    protected $fillable = ['user_id', 'driver', 'driver_id', 'timestamps'];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function logDescriptor(): string
+    {
+        return "{$this->driver}; {$this->user->logDescriptor()}";
+    }
+}
--- a/app/Auth/User.php
+++ b/app/Auth/User.php
@@ -0,0 +1,355 @@
+<?php
+
+namespace BookStack\Auth;
+
+use BookStack\Actions\Favourite;
+use BookStack\Api\ApiToken;
+use BookStack\Auth\Access\Mfa\MfaValue;
+use BookStack\Entities\Tools\SlugGenerator;
+use BookStack\Interfaces\Loggable;
+use BookStack\Interfaces\Sluggable;
+use BookStack\Model;
+use BookStack\Notifications\ResetPassword;
+use BookStack\Uploads\Image;
+use Carbon\Carbon;
+use Exception;
+use Illuminate\Auth\Authenticatable;
+use Illuminate\Auth\Passwords\CanResetPassword;
+use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
+use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Notifications\Notifiable;
+use Illuminate\Support\Collection;
+
+/**
+ * Class User.
+ *
+ * @property string     $id
+ * @property string     $name
+ * @property string     $slug
+ * @property string     $email
+ * @property string     $password
+ * @property Carbon     $created_at
+ * @property Carbon     $updated_at
+ * @property bool       $email_confirmed
+ * @property int        $image_id
+ * @property string     $external_auth_id
+ * @property string     $system_name
+ * @property Collection $roles
+ * @property Collection $mfaValues
+ */
+class User extends Model implements AuthenticatableContract, CanResetPasswordContract, Loggable, Sluggable
+{
+    use Authenticatable;
+    use CanResetPassword;
+    use Notifiable;
+
+    /**
+     * The database table used by the model.
+     *
+     * @var string
+     */
+    protected $table = 'users';
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = ['name', 'email'];
+
+    protected $casts = ['last_activity_at' => 'datetime'];
+
+    /**
+     * The attributes excluded from the model's JSON form.
+     *
+     * @var array
+     */
+    protected $hidden = [
+        'password', 'remember_token', 'system_name', 'email_confirmed', 'external_auth_id', 'email',
+        'created_at', 'updated_at', 'image_id',
+    ];
+
+    /**
+     * This holds the user's permissions when loaded.
+     *
+     * @var ?Collection
+     */
+    protected $permissions;
+
+    /**
+     * This holds the default user when loaded.
+     *
+     * @var null|User
+     */
+    protected static $defaultUser = null;
+
+    /**
+     * Returns the default public user.
+     */
+    public static function getDefault(): User
+    {
+        if (!is_null(static::$defaultUser)) {
+            return static::$defaultUser;
+        }
+
+        static::$defaultUser = static::query()->where('system_name', '=', 'public')->first();
+
+        return static::$defaultUser;
+    }
+
+    /**
+     * Check if the user is the default public user.
+     */
+    public function isDefault(): bool
+    {
+        return $this->system_name === 'public';
+    }
+
+    /**
+     * The roles that belong to the user.
+     *
+     * @return BelongsToMany
+     */
+    public function roles()
+    {
+        if ($this->id === 0) {
+            return;
+        }
+
+        return $this->belongsToMany(Role::class);
+    }
+
+    /**
+     * Check if the user has a role.
+     */
+    public function hasRole($roleId): bool
+    {
+        return $this->roles->pluck('id')->contains($roleId);
+    }
+
+    /**
+     * Check if the user has a role.
+     */
+    public function hasSystemRole(string $roleSystemName): bool
+    {
+        return $this->roles->pluck('system_name')->contains($roleSystemName);
+    }
+
+    /**
+     * Attach the default system role to this user.
+     */
+    public function attachDefaultRole(): void
+    {
+        $roleId = setting('registration-role');
+        if ($roleId && $this->roles()->where('id', '=', $roleId)->count() === 0) {
+            $this->roles()->attach($roleId);
+        }
+    }
+
+    /**
+     * Check if the user has a particular permission.
+     */
+    public function can(string $permissionName): bool
+    {
+        if ($this->email === 'guest') {
+            return false;
+        }
+
+        return $this->permissions()->contains($permissionName);
+    }
+
+    /**
+     * Get all permissions belonging to a the current user.
+     */
+    protected function permissions(): Collection
+    {
+        if (isset($this->permissions)) {
+            return $this->permissions;
+        }
+
+        $this->permissions = $this->newQuery()->getConnection()->table('role_user', 'ru')
+            ->select('role_permissions.name as name')->distinct()
+            ->leftJoin('permission_role', 'ru.role_id', '=', 'permission_role.role_id')
+            ->leftJoin('role_permissions', 'permission_role.permission_id', '=', 'role_permissions.id')
+            ->where('ru.user_id', '=', $this->id)
+            ->get()
+            ->pluck('name');
+
+        return $this->permissions;
+    }
+
+    /**
+     * Clear any cached permissions on this instance.
+     */
+    public function clearPermissionCache()
+    {
+        $this->permissions = null;
+    }
+
+    /**
+     * Attach a role to this user.
+     */
+    public function attachRole(Role $role)
+    {
+        $this->roles()->attach($role->id);
+    }
+
+    /**
+     * Get the social account associated with this user.
+     */
+    public function socialAccounts(): HasMany
+    {
+        return $this->hasMany(SocialAccount::class);
+    }
+
+    /**
+     * Check if the user has a social account,
+     * If a driver is passed it checks for that single account type.
+     *
+     * @param bool|string $socialDriver
+     *
+     * @return bool
+     */
+    public function hasSocialAccount($socialDriver = false)
+    {
+        if ($socialDriver === false) {
+            return $this->socialAccounts()->count() > 0;
+        }
+
+        return $this->socialAccounts()->where('driver', '=', $socialDriver)->exists();
+    }
+
+    /**
+     * Returns a URL to the user's avatar.
+     */
+    public function getAvatar(int $size = 50): string
+    {
+        $default = url('/user_avatar.png');
+        $imageId = $this->image_id;
+        if ($imageId === 0 || $imageId === '0' || $imageId === null) {
+            return $default;
+        }
+
+        try {
+            $avatar = $this->avatar ? url($this->avatar->getThumb($size, $size, false)) : $default;
+        } catch (Exception $err) {
+            $avatar = $default;
+        }
+
+        return $avatar;
+    }
+
+    /**
+     * Get the avatar for the user.
+     */
+    public function avatar(): BelongsTo
+    {
+        return $this->belongsTo(Image::class, 'image_id');
+    }
+
+    /**
+     * Get the API tokens assigned to this user.
+     */
+    public function apiTokens(): HasMany
+    {
+        return $this->hasMany(ApiToken::class);
+    }
+
+    /**
+     * Get the favourite instances for this user.
+     */
+    public function favourites(): HasMany
+    {
+        return $this->hasMany(Favourite::class);
+    }
+
+    /**
+     * Get the MFA values belonging to this use.
+     */
+    public function mfaValues(): HasMany
+    {
+        return $this->hasMany(MfaValue::class);
+    }
+
+    /**
+     * Get the last activity time for this user.
+     */
+    public function scopeWithLastActivityAt(Builder $query)
+    {
+        $query->addSelect(['activities.created_at as last_activity_at'])
+            ->leftJoinSub(function (\Illuminate\Database\Query\Builder $query) {
+                $query->from('activities')->select('user_id')
+                    ->selectRaw('max(created_at) as created_at')
+                    ->groupBy('user_id');
+            }, 'activities', 'users.id', '=', 'activities.user_id');
+    }
+
+    /**
+     * Get the url for editing this user.
+     */
+    public function getEditUrl(string $path = ''): string
+    {
+        $uri = '/settings/users/' . $this->id . '/' . trim($path, '/');
+
+        return url(rtrim($uri, '/'));
+    }
+
+    /**
+     * Get the url that links to this user's profile.
+     */
+    public function getProfileUrl(): string
+    {
+        return url('/user/' . $this->slug);
+    }
+
+    /**
+     * Get a shortened version of the user's name.
+     */
+    public function getShortName(int $chars = 8): string
+    {
+        if (mb_strlen($this->name) <= $chars) {
+            return $this->name;
+        }
+
+        $splitName = explode(' ', $this->name);
+        if (mb_strlen($splitName[0]) <= $chars) {
+            return $splitName[0];
+        }
+
+        return '';
+    }
+
+    /**
+     * Send the password reset notification.
+     *
+     * @param string $token
+     *
+     * @return void
+     */
+    public function sendPasswordResetNotification($token)
+    {
+        $this->notify(new ResetPassword($token));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function logDescriptor(): string
+    {
+        return "({$this->id}) {$this->name}";
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function refreshSlug(): string
+    {
+        $this->slug = app(SlugGenerator::class)->generate($this);
+
+        return $this->slug;
+    }
+}
--- a/app/Auth/UserRepo.php
+++ b/app/Auth/UserRepo.php
@@ -0,0 +1,281 @@
+<?php
+
+namespace BookStack\Auth;
+
+use Activity;
+use BookStack\Entities\EntityProvider;
+use BookStack\Entities\Models\Book;
+use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Models\Chapter;
+use BookStack\Entities\Models\Page;
+use BookStack\Exceptions\NotFoundException;
+use BookStack\Exceptions\UserUpdateException;
+use BookStack\Uploads\UserAvatars;
+use Exception;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Pagination\LengthAwarePaginator;
+use Log;
+
+class UserRepo
+{
+    protected $userAvatar;
+
+    /**
+     * UserRepo constructor.
+     */
+    public function __construct(UserAvatars $userAvatar)
+    {
+        $this->userAvatar = $userAvatar;
+    }
+
+    /**
+     * Get a user by their email address.
+     */
+    public function getByEmail(string $email): ?User
+    {
+        return User::query()->where('email', '=', $email)->first();
+    }
+
+    /**
+     * Get a user by their ID.
+     */
+    public function getById(int $id): User
+    {
+        return User::query()->findOrFail($id);
+    }
+
+    /**
+     * Get a user by their slug.
+     */
+    public function getBySlug(string $slug): User
+    {
+        return User::query()->where('slug', '=', $slug)->firstOrFail();
+    }
+
+    /**
+     * Get all the users with their permissions.
+     */
+    public function getAllUsers(): Collection
+    {
+        return User::query()->with('roles', 'avatar')->orderBy('name', 'asc')->get();
+    }
+
+    /**
+     * Get all the users with their permissions in a paginated format.
+     */
+    public function getAllUsersPaginatedAndSorted(int $count, array $sortData): LengthAwarePaginator
+    {
+        $sort = $sortData['sort'];
+
+        $query = User::query()->select(['*'])
+            ->withLastActivityAt()
+            ->with(['roles', 'avatar'])
+            ->withCount('mfaValues')
+            ->orderBy($sort, $sortData['order']);
+
+        if ($sortData['search']) {
+            $term = '%' . $sortData['search'] . '%';
+            $query->where(function ($query) use ($term) {
+                $query->where('name', 'like', $term)
+                    ->orWhere('email', 'like', $term);
+            });
+        }
+
+        return $query->paginate($count);
+    }
+
+    /**
+     * Creates a new user and attaches a role to them.
+     */
+    public function registerNew(array $data, bool $emailConfirmed = false): User
+    {
+        $user = $this->create($data, $emailConfirmed);
+        $user->attachDefaultRole();
+        $this->downloadAndAssignUserAvatar($user);
+
+        return $user;
+    }
+
+    /**
+     * Assign a user to a system-level role.
+     *
+     * @throws NotFoundException
+     */
+    public function attachSystemRole(User $user, string $systemRoleName)
+    {
+        $role = Role::getSystemRole($systemRoleName);
+        if (is_null($role)) {
+            throw new NotFoundException("Role '{$systemRoleName}' not found");
+        }
+        $user->attachRole($role);
+    }
+
+    /**
+     * Checks if the give user is the only admin.
+     */
+    public function isOnlyAdmin(User $user): bool
+    {
+        if (!$user->hasSystemRole('admin')) {
+            return false;
+        }
+
+        $adminRole = Role::getSystemRole('admin');
+        if ($adminRole->users()->count() > 1) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Set the assigned user roles via an array of role IDs.
+     *
+     * @throws UserUpdateException
+     */
+    public function setUserRoles(User $user, array $roles)
+    {
+        if ($this->demotingLastAdmin($user, $roles)) {
+            throw new UserUpdateException(trans('errors.role_cannot_remove_only_admin'), $user->getEditUrl());
+        }
+
+        $user->roles()->sync($roles);
+    }
+
+    /**
+     * Check if the given user is the last admin and their new roles no longer
+     * contains the admin role.
+     */
+    protected function demotingLastAdmin(User $user, array $newRoles): bool
+    {
+        if ($this->isOnlyAdmin($user)) {
+            $adminRole = Role::getSystemRole('admin');
+            if (!in_array(strval($adminRole->id), $newRoles)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Create a new basic instance of user.
+     */
+    public function create(array $data, bool $emailConfirmed = false): User
+    {
+        $details = [
+            'name'             => $data['name'],
+            'email'            => $data['email'],
+            'password'         => bcrypt($data['password']),
+            'email_confirmed'  => $emailConfirmed,
+            'external_auth_id' => $data['external_auth_id'] ?? '',
+        ];
+
+        $user = new User();
+        $user->forceFill($details);
+        $user->refreshSlug();
+        $user->save();
+
+        return $user;
+    }
+
+    /**
+     * Remove the given user from storage, Delete all related content.
+     *
+     * @throws Exception
+     */
+    public function destroy(User $user, ?int $newOwnerId = null)
+    {
+        $user->socialAccounts()->delete();
+        $user->apiTokens()->delete();
+        $user->favourites()->delete();
+        $user->mfaValues()->delete();
+        $user->delete();
+
+        // Delete user profile images
+        $this->userAvatar->destroyAllForUser($user);
+
+        if (!empty($newOwnerId)) {
+            $newOwner = User::query()->find($newOwnerId);
+            if (!is_null($newOwner)) {
+                $this->migrateOwnership($user, $newOwner);
+            }
+        }
+    }
+
+    /**
+     * Migrate ownership of items in the system from one user to another.
+     */
+    protected function migrateOwnership(User $fromUser, User $toUser)
+    {
+        $entities = (new EntityProvider())->all();
+        foreach ($entities as $instance) {
+            $instance->newQuery()->where('owned_by', '=', $fromUser->id)
+                ->update(['owned_by' => $toUser->id]);
+        }
+    }
+
+    /**
+     * Get the latest activity for a user.
+     */
+    public function getActivity(User $user, int $count = 20, int $page = 0): array
+    {
+        return Activity::userActivity($user, $count, $page);
+    }
+
+    /**
+     * Get the recently created content for this given user.
+     */
+    public function getRecentlyCreated(User $user, int $count = 20): array
+    {
+        $query = function (Builder $query) use ($user, $count) {
+            return $query->orderBy('created_at', 'desc')
+                ->where('created_by', '=', $user->id)
+                ->take($count)
+                ->get();
+        };
+
+        return [
+            'pages'    => $query(Page::visible()->where('draft', '=', false)),
+            'chapters' => $query(Chapter::visible()),
+            'books'    => $query(Book::visible()),
+            'shelves'  => $query(Bookshelf::visible()),
+        ];
+    }
+
+    /**
+     * Get asset created counts for the give user.
+     */
+    public function getAssetCounts(User $user): array
+    {
+        $createdBy = ['created_by' => $user->id];
+
+        return [
+            'pages'       => Page::visible()->where($createdBy)->count(),
+            'chapters'    => Chapter::visible()->where($createdBy)->count(),
+            'books'       => Book::visible()->where($createdBy)->count(),
+            'shelves'     => Bookshelf::visible()->where($createdBy)->count(),
+        ];
+    }
+
+    /**
+     * Get the roles in the system that are assignable to a user.
+     */
+    public function getAllRoles(): Collection
+    {
+        return Role::query()->orderBy('display_name', 'asc')->get();
+    }
+
+    /**
+     * Get an avatar image for a user and set it as their avatar.
+     * Returns early if avatars disabled or not set in config.
+     */
+    public function downloadAndAssignUserAvatar(User $user): void
+    {
+        try {
+            $this->userAvatar->fetchAndAssignToUser($user);
+        } catch (Exception $e) {
+            Log::error('Failed to save user avatar image');
+        }
+    }
+}
--- a/app/Book.php
+++ b/app/Book.php
@@ -1,97 +0,0 @@
-<?php namespace BookStack;
-
-class Book extends Entity
-{
-    public $searchFactor = 2;
-
-    protected $fillable = ['name', 'description', 'image_id'];
-
-    /**
-     * Get the url for this book.
-     * @param string|bool $path
-     * @return string
-     */
-    public function getUrl($path = false)
-    {
-        if ($path !== false) {
-            return baseUrl('/books/' . urlencode($this->slug) . '/' . trim($path, '/'));
-        }
-        return baseUrl('/books/' . urlencode($this->slug));
-    }
-
-    /**
-     * Returns book cover image, if book cover not exists return default cover image.
-     * @param int $width - Width of the image
-     * @param int $height - Height of the image
-     * @return string
-     */
-    public function getBookCover($width = 440, $height = 250)
-    {
-        $default = baseUrl('/book_default_cover.png');
-        if (!$this->image_id) {
-            return $default;
-        }
-
-        try {
-            $cover = $this->cover ? baseUrl($this->cover->getThumb($width, $height, false)) : $default;
-        } catch (\Exception $err) {
-            $cover = $default;
-        }
-        return $cover;
-    }
-
-    /**
-     * Get the cover image of the book
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function cover()
-    {
-        return $this->belongsTo(Image::class, 'image_id');
-    }
-    /*
-     * Get the edit url for this book.
-     * @return string
-     */
-    public function getEditUrl()
-    {
-        return $this->getUrl() . '/edit';
-    }
-
-    /**
-     * Get all pages within this book.
-     * @return \Illuminate\Database\Eloquent\Relations\HasMany
-     */
-    public function pages()
-    {
-        return $this->hasMany(Page::class);
-    }
-
-    /**
-     * Get all chapters within this book.
-     * @return \Illuminate\Database\Eloquent\Relations\HasMany
-     */
-    public function chapters()
-    {
-        return $this->hasMany(Chapter::class);
-    }
-
-    /**
-     * Get an excerpt of this book's description to the specified length or less.
-     * @param int $length
-     * @return string
-     */
-    public function getExcerpt($length = 100)
-    {
-        $description = $this->description;
-        return strlen($description) > $length ? substr($description, 0, $length-3) . '...' : $description;
-    }
-
-    /**
-     * Return a generalised, common raw query that can be 'unioned' across entities.
-     * @return string
-     */
-    public function entityRawQuery()
-    {
-        return "'BookStack\\\\Book' as entity_type, id, id as entity_id, slug, name, {$this->textField} as text,'' as html, '0' as book_id, '0' as priority, '0' as chapter_id, '0' as draft, created_by, updated_by, updated_at, created_at";
-    }
-}
--- a/app/Chapter.php
+++ b/app/Chapter.php
@@ -1,61 +0,0 @@
-<?php namespace BookStack;
-
-class Chapter extends Entity
-{
-    public $searchFactor = 1.3;
-
-    protected $fillable = ['name', 'description', 'priority', 'book_id'];
-
-    /**
-     * Get the book this chapter is within.
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function book()
-    {
-        return $this->belongsTo(Book::class);
-    }
-
-    /**
-     * Get the pages that this chapter contains.
-     * @param string $dir
-     * @return mixed
-     */
-    public function pages($dir = 'ASC')
-    {
-        return $this->hasMany(Page::class)->orderBy('priority', $dir);
-    }
-
-    /**
-     * Get the url of this chapter.
-     * @param string|bool $path
-     * @return string
-     */
-    public function getUrl($path = false)
-    {
-        $bookSlug = $this->getAttribute('bookSlug') ? $this->getAttribute('bookSlug') : $this->book->slug;
-        if ($path !== false) {
-            return baseUrl('/books/' . urlencode($bookSlug) . '/chapter/' . urlencode($this->slug) . '/' . trim($path, '/'));
-        }
-        return baseUrl('/books/' . urlencode($bookSlug) . '/chapter/' . urlencode($this->slug));
-    }
-
-    /**
-     * Get an excerpt of this chapter's description to the specified length or less.
-     * @param int $length
-     * @return string
-     */
-    public function getExcerpt($length = 100)
-    {
-        $description = $this->description;
-        return strlen($description) > $length ? substr($description, 0, $length-3) . '...' : $description;
-    }
-
-    /**
-     * Return a generalised, common raw query that can be 'unioned' across entities.
-     * @return string
-     */
-    public function entityRawQuery()
-    {
-        return "'BookStack\\\\Chapter' as entity_type, id, id as entity_id, slug, name, {$this->textField} as text, '' as html, book_id, priority, '0' as chapter_id, '0' as draft, created_by, updated_by, updated_at, created_at";
-    }
-}
--- a/app/Config/api.php
+++ b/app/Config/api.php
@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * API configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // The default number of items that are returned in listing API requests.
+    // This count can often be overridden, up the the max option, per-request via request options.
+    'default_item_count' => env('API_DEFAULT_ITEM_COUNT', 100),
+
+    // The maximum number of items that can be returned in a listing API request.
+    'max_item_count' => env('API_MAX_ITEM_COUNT', 500),
+
+    // The number of API requests that can be made per minute by a single user.
+    'requests_per_minute' => env('API_REQUESTS_PER_MIN', 180),
+
+];
--- a/app/Config/app.php
+++ b/app/Config/app.php
@@ -0,0 +1,199 @@
+<?php
+
+/**
+ * Global app configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // The environment to run BookStack in.
+    // Options: production, development, demo, testing
+    'env' => env('APP_ENV', 'production'),
+
+    // Enter the application in debug mode.
+    // Shows much more verbose error messages. Has potential to show
+    // private configuration variables so should remain disabled in public.
+    'debug' => env('APP_DEBUG', false),
+
+    // The number of revisions to keep in the database.
+    // Once this limit is reached older revisions will be deleted.
+    // If set to false then a limit will not be enforced.
+    'revision_limit' => env('REVISION_LIMIT', 50),
+
+    // The number of days that content will remain in the recycle bin before
+    // being considered for auto-removal. It is not a guarantee that content will
+    // be removed after this time.
+    // Set to 0 for no recycle bin functionality.
+    // Set to -1 for unlimited recycle bin lifetime.
+    'recycle_bin_lifetime' => env('RECYCLE_BIN_LIFETIME', 30),
+
+    // Allow <script> tags to entered within page content.
+    // <script> tags are escaped by default.
+    // Even when overridden the WYSIWYG editor may still escape script content.
+    'allow_content_scripts' => env('ALLOW_CONTENT_SCRIPTS', false),
+
+    // Allow server-side fetches to be performed to potentially unknown
+    // and user-provided locations. Primarily used in exports when loading
+    // in externally referenced assets.
+    'allow_untrusted_server_fetching' => env('ALLOW_UNTRUSTED_SERVER_FETCHING', false),
+
+    // Override the default behaviour for allowing crawlers to crawl the instance.
+    // May be ignored if view has be overridden or modified.
+    // Defaults to null since, if not set, 'app-public' status used instead.
+    'allow_robots' => env('ALLOW_ROBOTS', null),
+
+    // Application Base URL, Used by laravel in development commands
+    // and used by BookStack in URL generation.
+    'url' => env('APP_URL', '') === 'http://bookstack.dev' ? '' : env('APP_URL', ''),
+
+    // A list of hosts that BookStack can be iframed within.
+    // Space separated if multiple. BookStack host domain is auto-inferred.
+    'iframe_hosts' => env('ALLOWED_IFRAME_HOSTS', null),
+
+    // Application timezone for back-end date functions.
+    'timezone' => env('APP_TIMEZONE', 'UTC'),
+
+    // Default locale to use
+    'locale' => env('APP_LANG', 'en'),
+
+    // Locales available
+    'locales' => ['en', 'ar', 'bg', 'bs', 'ca', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'fa', 'fr', 'he', 'hr', 'hu', 'id', 'it', 'ja', 'ko', 'lt', 'lv', 'nl', 'nb', 'pt', 'pt_BR', 'sk', 'sl', 'sv', 'pl',  'ru', 'th', 'tr', 'uk', 'vi', 'zh_CN', 'zh_TW'],
+
+    //  Application Fallback Locale
+    'fallback_locale' => 'en',
+
+    // Faker Locale
+    'faker_locale' => 'en_GB',
+
+    // Enable right-to-left text control.
+    'rtl' => false,
+
+    // Auto-detect the locale for public users
+    // For public users their locale can be guessed by headers sent by their
+    // browser. This is usually set by users in their browser settings.
+    // If not found the default app locale will be used.
+    'auto_detect_locale' => env('APP_AUTO_LANG_PUBLIC', true),
+
+    // Encryption key
+    'key' => env('APP_KEY', 'AbAZchsay4uBTU33RubBzLKw203yqSqr'),
+
+    // Encryption cipher
+    'cipher' => 'AES-256-CBC',
+
+    // Application Services Provides
+    'providers' => [
+
+        // Laravel Framework Service Providers...
+        Illuminate\Auth\AuthServiceProvider::class,
+        Illuminate\Broadcasting\BroadcastServiceProvider::class,
+        Illuminate\Bus\BusServiceProvider::class,
+        Illuminate\Cache\CacheServiceProvider::class,
+        Illuminate\Foundation\Providers\ConsoleSupportServiceProvider::class,
+        Illuminate\Cookie\CookieServiceProvider::class,
+        Illuminate\Database\DatabaseServiceProvider::class,
+        Illuminate\Encryption\EncryptionServiceProvider::class,
+        Illuminate\Filesystem\FilesystemServiceProvider::class,
+        Illuminate\Foundation\Providers\FoundationServiceProvider::class,
+        Illuminate\Hashing\HashServiceProvider::class,
+        Illuminate\Mail\MailServiceProvider::class,
+        Illuminate\Pipeline\PipelineServiceProvider::class,
+        Illuminate\Queue\QueueServiceProvider::class,
+        Illuminate\Redis\RedisServiceProvider::class,
+        Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
+        Illuminate\Session\SessionServiceProvider::class,
+        Illuminate\Validation\ValidationServiceProvider::class,
+        Illuminate\View\ViewServiceProvider::class,
+        Illuminate\Notifications\NotificationServiceProvider::class,
+        SocialiteProviders\Manager\ServiceProvider::class,
+
+        // Third party service providers
+        Intervention\Image\ImageServiceProvider::class,
+        Barryvdh\DomPDF\ServiceProvider::class,
+        Barryvdh\Snappy\ServiceProvider::class,
+
+        // BookStack replacement service providers (Extends Laravel)
+        BookStack\Providers\PaginationServiceProvider::class,
+        BookStack\Providers\TranslationServiceProvider::class,
+
+        // BookStack custom service providers
+        BookStack\Providers\ThemeServiceProvider::class,
+        BookStack\Providers\AuthServiceProvider::class,
+        BookStack\Providers\AppServiceProvider::class,
+        BookStack\Providers\BroadcastServiceProvider::class,
+        BookStack\Providers\EventServiceProvider::class,
+        BookStack\Providers\RouteServiceProvider::class,
+        BookStack\Providers\CustomFacadeProvider::class,
+        BookStack\Providers\CustomValidationServiceProvider::class,
+    ],
+
+    /*
+    |--------------------------------------------------------------------------
+    | Class Aliases
+    |--------------------------------------------------------------------------
+    |
+    | This array of class aliases will be registered when this application
+    | is started. However, feel free to register as many as you wish as
+    | the aliases are "lazy" loaded so they don't hinder performance.
+    |
+    */
+
+    // Class aliases, Registered on application start
+    'aliases' => [
+
+        // Laravel
+        'App'          => Illuminate\Support\Facades\App::class,
+        'Arr'          => Illuminate\Support\Arr::class,
+        'Artisan'      => Illuminate\Support\Facades\Artisan::class,
+        'Auth'         => Illuminate\Support\Facades\Auth::class,
+        'Blade'        => Illuminate\Support\Facades\Blade::class,
+        'Bus'          => Illuminate\Support\Facades\Bus::class,
+        'Cache'        => Illuminate\Support\Facades\Cache::class,
+        'Config'       => Illuminate\Support\Facades\Config::class,
+        'Cookie'       => Illuminate\Support\Facades\Cookie::class,
+        'Crypt'        => Illuminate\Support\Facades\Crypt::class,
+        'DB'           => Illuminate\Support\Facades\DB::class,
+        'Eloquent'     => Illuminate\Database\Eloquent\Model::class,
+        'Event'        => Illuminate\Support\Facades\Event::class,
+        'File'         => Illuminate\Support\Facades\File::class,
+        'Hash'         => Illuminate\Support\Facades\Hash::class,
+        'Input'        => Illuminate\Support\Facades\Input::class,
+        'Inspiring'    => Illuminate\Foundation\Inspiring::class,
+        'Lang'         => Illuminate\Support\Facades\Lang::class,
+        'Log'          => Illuminate\Support\Facades\Log::class,
+        'Mail'         => Illuminate\Support\Facades\Mail::class,
+        'Notification' => Illuminate\Support\Facades\Notification::class,
+        'Password'     => Illuminate\Support\Facades\Password::class,
+        'Queue'        => Illuminate\Support\Facades\Queue::class,
+        'Redirect'     => Illuminate\Support\Facades\Redirect::class,
+        'Redis'        => Illuminate\Support\Facades\Redis::class,
+        'Request'      => Illuminate\Support\Facades\Request::class,
+        'Response'     => Illuminate\Support\Facades\Response::class,
+        'Route'        => Illuminate\Support\Facades\Route::class,
+        'Schema'       => Illuminate\Support\Facades\Schema::class,
+        'Session'      => Illuminate\Support\Facades\Session::class,
+        'Storage'      => Illuminate\Support\Facades\Storage::class,
+        'Str'          => Illuminate\Support\Str::class,
+        'URL'          => Illuminate\Support\Facades\URL::class,
+        'Validator'    => Illuminate\Support\Facades\Validator::class,
+        'View'         => Illuminate\Support\Facades\View::class,
+        'Socialite'    => Laravel\Socialite\Facades\Socialite::class,
+
+        // Third Party
+        'ImageTool' => Intervention\Image\Facades\Image::class,
+        'DomPDF'    => Barryvdh\DomPDF\Facade::class,
+        'SnappyPDF' => Barryvdh\Snappy\Facades\SnappyPdf::class,
+
+        // Custom BookStack
+        'Activity'    => BookStack\Facades\Activity::class,
+        'Permissions' => BookStack\Facades\Permissions::class,
+        'Theme'       => BookStack\Facades\Theme::class,
+    ],
+
+    // Proxy configuration
+    'proxies' => env('APP_PROXIES', ''),
+
+];
--- a/app/Config/auth.php
+++ b/app/Config/auth.php
@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * Authentication configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Method of authentication to use
+    // Options: standard, ldap, saml2
+    'method' => env('AUTH_METHOD', 'standard'),
+
+    // Authentication Defaults
+    // This option controls the default authentication "guard" and password
+    // reset options for your application.
+    'defaults' => [
+        'guard'     => env('AUTH_METHOD', 'standard'),
+        'passwords' => 'users',
+    ],
+
+    // Authentication Guards
+    // All authentication drivers have a user provider. This defines how the
+    // users are actually retrieved out of your database or other storage
+    // mechanisms used by this application to persist your user's data.
+    // Supported drivers: "session", "api-token", "ldap-session"
+    'guards' => [
+        'standard' => [
+            'driver'   => 'session',
+            'provider' => 'users',
+        ],
+        'ldap' => [
+            'driver'   => 'ldap-session',
+            'provider' => 'external',
+        ],
+        'saml2' => [
+            'driver'   => 'saml2-session',
+            'provider' => 'external',
+        ],
+        'api' => [
+            'driver' => 'api-token',
+        ],
+    ],
+
+    // User Providers
+    // All authentication drivers have a user provider. This defines how the
+    // users are actually retrieved out of your database or other storage
+    // mechanisms used by this application to persist your user's data.
+    'providers' => [
+        'users' => [
+            'driver' => 'eloquent',
+            'model'  => \BookStack\Auth\User::class,
+        ],
+        'external' => [
+            'driver' => 'external-users',
+            'model'  => \BookStack\Auth\User::class,
+        ],
+    ],
+
+    // Resetting Passwords
+    // The expire time is the number of minutes that the reset token should be
+    // considered valid. This security feature keeps tokens short-lived so
+    // they have less time to be guessed. You may change this as needed.
+    'passwords' => [
+        'users' => [
+            'provider' => 'users',
+            'email'    => 'emails.password',
+            'table'    => 'password_resets',
+            'expire'   => 60,
+        ],
+    ],
+
+];
--- a/app/Config/broadcasting.php
+++ b/app/Config/broadcasting.php
@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * Broadcasting configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Default Broadcaster
+    // This option controls the default broadcaster that will be used by the
+    // framework when an event needs to be broadcast. This can be set to
+    // any of the connections defined in the "connections" array below.
+    'default' => env('BROADCAST_DRIVER', 'pusher'),
+
+    // Broadcast Connections
+    // Here you may define all of the broadcast connections that will be used
+    // to broadcast events to other systems or over websockets. Samples of
+    // each available type of connection are provided inside this array.
+    'connections' => [
+
+        'pusher' => [
+            'driver'  => 'pusher',
+            'key'     => env('PUSHER_APP_KEY'),
+            'secret'  => env('PUSHER_APP_SECRET'),
+            'app_id'  => env('PUSHER_APP_ID'),
+            'options' => [
+                'cluster' => env('PUSHER_APP_CLUSTER'),
+                'useTLS'  => true,
+            ],
+        ],
+
+        'redis' => [
+            'driver'     => 'redis',
+            'connection' => 'default',
+        ],
+
+        'log' => [
+            'driver' => 'log',
+        ],
+
+        'null' => [
+            'driver' => 'null',
+        ],
+
+    ],
+
+];
--- a/app/Config/cache.php
+++ b/app/Config/cache.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * Caching configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+// MEMCACHED - Split out configuration into an array
+if (env('CACHE_DRIVER') === 'memcached') {
+    $memcachedServerKeys = ['host', 'port', 'weight'];
+    $memcachedServers = explode(',', trim(env('MEMCACHED_SERVERS', '127.0.0.1:11211:100'), ','));
+    foreach ($memcachedServers as $index => $memcachedServer) {
+        $memcachedServerDetails = explode(':', $memcachedServer);
+        if (count($memcachedServerDetails) < 2) {
+            $memcachedServerDetails[] = '11211';
+        }
+        if (count($memcachedServerDetails) < 3) {
+            $memcachedServerDetails[] = '100';
+        }
+        $memcachedServers[$index] = array_combine($memcachedServerKeys, $memcachedServerDetails);
+    }
+}
+
+return [
+
+    // Default cache store to use
+    // Can be overridden at cache call-time
+    'default' => env('CACHE_DRIVER', 'file'),
+
+    // Available caches stores
+    'stores' => [
+
+        'apc' => [
+            'driver' => 'apc',
+        ],
+
+        'array' => [
+            'driver' => 'array',
+        ],
+
+        'database' => [
+            'driver'     => 'database',
+            'table'      => 'cache',
+            'connection' => null,
+        ],
+
+        'file' => [
+            'driver' => 'file',
+            'path'   => storage_path('framework/cache'),
+        ],
+
+        'memcached' => [
+            'driver'  => 'memcached',
+            'servers' => env('CACHE_DRIVER') === 'memcached' ? $memcachedServers : [],
+        ],
+
+        'redis' => [
+            'driver'     => 'redis',
+            'connection' => 'default',
+        ],
+
+    ],
+
+    // Cache key prefix
+    // Used to prevent collisions in shared cache systems.
+    'prefix' => env('CACHE_PREFIX', 'bookstack_cache'),
+
+];
--- a/app/Config/database.php
+++ b/app/Config/database.php
@@ -0,0 +1,107 @@
+<?php
+
+/**
+ * Database configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+// REDIS
+// Split out configuration into an array
+if (env('REDIS_SERVERS', false)) {
+    $redisDefaults = ['host' => '127.0.0.1', 'port' => '6379', 'database' => '0', 'password' => null];
+    $redisServers = explode(',', trim(env('REDIS_SERVERS', '127.0.0.1:6379:0'), ','));
+    $redisConfig = ['client' => 'predis'];
+    $cluster = count($redisServers) > 1;
+
+    if ($cluster) {
+        $redisConfig['clusters'] = ['default' => []];
+    }
+
+    foreach ($redisServers as $index => $redisServer) {
+        $redisServerDetails = explode(':', $redisServer);
+
+        $serverConfig = [];
+        $configIndex = 0;
+        foreach ($redisDefaults as $configKey => $configDefault) {
+            $serverConfig[$configKey] = ($redisServerDetails[$configIndex] ?? $configDefault);
+            $configIndex++;
+        }
+
+        if ($cluster) {
+            $redisConfig['clusters']['default'][] = $serverConfig;
+        } else {
+            $redisConfig['default'] = $serverConfig;
+        }
+    }
+}
+
+// MYSQL
+// Split out port from host if set
+$mysql_host = env('DB_HOST', 'localhost');
+$mysql_host_exploded = explode(':', $mysql_host);
+$mysql_port = env('DB_PORT', 3306);
+if (count($mysql_host_exploded) > 1) {
+    $mysql_host = $mysql_host_exploded[0];
+    $mysql_port = intval($mysql_host_exploded[1]);
+}
+
+return [
+
+    // Default database connection name.
+    // Options: mysql, mysql_testing
+    'default' => env('DB_CONNECTION', 'mysql'),
+
+    // Available database connections
+    // Many of those shown here are unsupported by BookStack.
+    'connections' => [
+
+        'mysql' => [
+            'driver'         => 'mysql',
+            'url'            => env('DATABASE_URL'),
+            'host'           => $mysql_host,
+            'database'       => env('DB_DATABASE', 'forge'),
+            'username'       => env('DB_USERNAME', 'forge'),
+            'password'       => env('DB_PASSWORD', ''),
+            'unix_socket'    => env('DB_SOCKET', ''),
+            'port'           => $mysql_port,
+            'charset'        => 'utf8mb4',
+            'collation'      => 'utf8mb4_unicode_ci',
+            'prefix'         => '',
+            'prefix_indexes' => true,
+            'strict'         => false,
+            'engine'         => null,
+            'options'        => extension_loaded('pdo_mysql') ? array_filter([
+                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
+            ]) : [],
+        ],
+
+        'mysql_testing' => [
+            'driver'         => 'mysql',
+            'url'            => env('TEST_DATABASE_URL'),
+            'host'           => '127.0.0.1',
+            'database'       => 'bookstack-test',
+            'username'       => env('MYSQL_USER', 'bookstack-test'),
+            'password'       => env('MYSQL_PASSWORD', 'bookstack-test'),
+            'port'           => $mysql_port,
+            'charset'        => 'utf8mb4',
+            'collation'      => 'utf8mb4_unicode_ci',
+            'prefix'         => '',
+            'prefix_indexes' => true,
+            'strict'         => false,
+        ],
+
+    ],
+
+    // Migration Repository Table
+    // This table keeps track of all the migrations that have already run for
+    // your application. Using this information, we can determine which of
+    // the migrations on disk haven't actually been run in the database.
+    'migrations' => 'migrations',
+
+    // Redis configuration to use if set
+    'redis' => env('REDIS_SERVERS', false) ? $redisConfig : [],
+
+];
--- a/app/Config/debugbar.php
+++ b/app/Config/debugbar.php
@@ -0,0 +1,132 @@
+<?php
+
+/**
+ * Debugbar Configuration Options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Debugbar is enabled by default, when debug is set to true in app.php.
+    // You can override the value by setting enable to true or false instead of null.
+    //
+    // You can provide an array of URI's that must be ignored (eg. 'api/*')
+    'enabled' => env('DEBUGBAR_ENABLED', false),
+    'except'  => [
+        'telescope*',
+    ],
+
+    // DebugBar stores data for session/ajax requests.
+    // You can disable this, so the debugbar stores data in headers/session,
+    // but this can cause problems with large data collectors.
+    // By default, file storage (in the storage folder) is used. Redis and PDO
+    // can also be used. For PDO, run the package migrations first.
+    'storage' => [
+        'enabled'    => true,
+        'driver'     => 'file', // redis, file, pdo, custom
+        'path'       => storage_path('debugbar'), // For file driver
+        'connection' => null,   // Leave null for default connection (Redis/PDO)
+        'provider'   => '', // Instance of StorageInterface for custom driver
+    ],
+
+    // Vendor files are included by default, but can be set to false.
+    // This can also be set to 'js' or 'css', to only include javascript or css vendor files.
+    // Vendor files are for css: font-awesome (including fonts) and highlight.js (css files)
+    // and for js: jquery and and highlight.js
+    // So if you want syntax highlighting, set it to true.
+    // jQuery is set to not conflict with existing jQuery scripts.
+    'include_vendors' => true,
+
+    // The Debugbar can capture Ajax requests and display them. If you don't want this (ie. because of errors),
+    // you can use this option to disable sending the data through the headers.
+    // Optionally, you can also send ServerTiming headers on ajax requests for the Chrome DevTools.
+
+    'capture_ajax'    => true,
+    'add_ajax_timing' => false,
+
+    // When enabled, the Debugbar shows deprecated warnings for Symfony components
+    // in the Messages tab.
+    'error_handler' => false,
+
+    // The Debugbar can emulate the Clockwork headers, so you can use the Chrome
+    // Extension, without the server-side code. It uses Debugbar collectors instead.
+    'clockwork' => false,
+
+    // Enable/disable DataCollectors
+    'collectors' => [
+        'phpinfo'         => true,  // Php version
+        'messages'        => true,  // Messages
+        'time'            => true,  // Time Datalogger
+        'memory'          => true,  // Memory usage
+        'exceptions'      => true,  // Exception displayer
+        'log'             => true,  // Logs from Monolog (merged in messages if enabled)
+        'db'              => true,  // Show database (PDO) queries and bindings
+        'views'           => true,  // Views with their data
+        'route'           => true,  // Current route information
+        'auth'            => true, // Display Laravel authentication status
+        'gate'            => true, // Display Laravel Gate checks
+        'session'         => true,  // Display session data
+        'symfony_request' => true,  // Only one can be enabled..
+        'mail'            => true,  // Catch mail messages
+        'laravel'         => false, // Laravel version and environment
+        'events'          => false, // All events fired
+        'default_request' => false, // Regular or special Symfony request logger
+        'logs'            => false, // Add the latest log messages
+        'files'           => false, // Show the included files
+        'config'          => false, // Display config settings
+        'cache'           => false, // Display cache events
+        'models'          => true, // Display models
+    ],
+
+    // Configure some DataCollectors
+    'options' => [
+        'auth' => [
+            'show_name' => true,   // Also show the users name/email in the debugbar
+        ],
+        'db' => [
+            'with_params'       => true,   // Render SQL with the parameters substituted
+            'backtrace'         => true,   // Use a backtrace to find the origin of the query in your files.
+            'timeline'          => false,  // Add the queries to the timeline
+            'explain'           => [                 // Show EXPLAIN output on queries
+                'enabled' => false,
+                'types'   => ['SELECT'],     // ['SELECT', 'INSERT', 'UPDATE', 'DELETE']; for MySQL 5.6.3+
+            ],
+            'hints'             => true,    // Show hints for common mistakes
+        ],
+        'mail' => [
+            'full_log' => false,
+        ],
+        'views' => [
+            'data' => false,    //Note: Can slow down the application, because the data can be quite large..
+        ],
+        'route' => [
+            'label' => true,  // show complete route on bar
+        ],
+        'logs' => [
+            'file' => null,
+        ],
+        'cache' => [
+            'values' => true, // collect cache values
+        ],
+    ],
+
+    // Inject Debugbar into the response
+    // Usually, the debugbar is added just before </body>, by listening to the
+    // Response after the App is done. If you disable this, you have to add them
+    // in your template yourself. See http://phpdebugbar.com/docs/rendering.html
+    'inject' => true,
+
+    // DebugBar route prefix
+    // Sometimes you want to set route prefix to be used by DebugBar to load
+    // its resources from. Usually the need comes from misconfigured web server or
+    // from trying to overcome bugs like this: http://trac.nginx.org/nginx/ticket/97
+    'route_prefix' => '_debugbar',
+
+    // DebugBar route domain
+    // By default DebugBar route served from the same domain that request served.
+    // To override default domain, specify it as a non-empty value.
+    'route_domain' => env('APP_URL', '') === 'http://bookstack.dev' ? '' : env('APP_URL', ''),
+];
--- a/app/Config/dompdf.php
+++ b/app/Config/dompdf.php
@@ -1,21 +1,20 @@
 <?php

+/**
+ * DOMPDF configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
 return [

-    /*
-    |--------------------------------------------------------------------------
-    | Settings
-    |--------------------------------------------------------------------------
-    |
-    | Set some default values. It is possible to add all defines that can be set
-    | in dompdf_config.inc.php. You can also override the entire config file.
-    |
-    */
    'show_warnings' => false,   // Throw an Exception on warnings from dompdf
-    'orientation' => 'portrait',
-    'defines' => [
+    'orientation'   => 'portrait',
+    'defines'       => [
        /**
-         * The location of the DOMPDF font directory
+         * The location of the DOMPDF font directory.
         *
         * The location of the directory where DOMPDF will store fonts and font metrics
         * Note: This directory must exist and be writable by the webserver process.
@@ -38,17 +37,17 @@ return [
         * Times-Roman, Times-Bold, Times-BoldItalic, Times-Italic,
         * Symbol, ZapfDingbats.
         */
-        "DOMPDF_FONT_DIR" => app_path('vendor/dompdf/dompdf/lib/fonts/'), //storage_path('fonts/'), // advised by dompdf (https://github.com/dompdf/dompdf/pull/782)
+        'font_dir' => storage_path('fonts/'),  // advised by dompdf (https://github.com/dompdf/dompdf/pull/782)

        /**
-         * The location of the DOMPDF font cache directory
+         * The location of the DOMPDF font cache directory.
         *
         * This directory contains the cached font metrics for the fonts used by DOMPDF.
         * This directory can be the same as DOMPDF_FONT_DIR
         *
         * Note: This directory must exist and be writable by the webserver process.
         */
-        "DOMPDF_FONT_CACHE" => storage_path('fonts/'),
+        'font_cache' => storage_path('fonts/'),

        /**
         * The location of a temporary directory.
@@ -57,10 +56,10 @@ return [
         * The temporary directory is required to download remote images and when
         * using the PFDLib back end.
         */
-        "DOMPDF_TEMP_DIR" => sys_get_temp_dir(),
+        'temp_dir' => sys_get_temp_dir(),

        /**
-         * ==== IMPORTANT ====
+         * ==== IMPORTANT ====.
         *
         * dompdf's "chroot": Prevents dompdf from accessing system files or other
         * files on the webserver.  All local files opened by dompdf must be in a
@@ -69,9 +68,9 @@ return [
         * should be an absolute path.
         * This is only checked on command line call by dompdf.php, but not by
         * direct class use like:
-         * $dompdf = new DOMPDF();	$dompdf->load_html($htmldata); $dompdf->render(); $pdfdata = $dompdf->output();
+         * $dompdf = new DOMPDF();  $dompdf->load_html($htmldata); $dompdf->render(); $pdfdata = $dompdf->output();
         */
-        "DOMPDF_CHROOT" => realpath(base_path()),
+        'chroot' => realpath(base_path()),

        /**
         * Whether to use Unicode fonts or not.
@@ -82,20 +81,19 @@ return [
         * When enabled, dompdf can support all Unicode glyphs. Any glyphs used in a
         * document must be present in your fonts, however.
         */
-        "DOMPDF_UNICODE_ENABLED" => true,
+        'unicode_enabled' => true,

        /**
         * Whether to enable font subsetting or not.
         */
-        "DOMPDF_ENABLE_FONTSUBSETTING" => false,
+        'enable_fontsubsetting' => false,

        /**
-         * The PDF rendering backend to use
+         * The PDF rendering backend to use.
         *
         * Valid settings are 'PDFLib', 'CPDF' (the bundled R&OS PDF class), 'GD' and
         * 'auto'. 'auto' will look for PDFLib and use it if found, or if not it will
-         * fall back on CPDF. 'GD' renders PDFs to graphic files. {@link
-         * Canvas_Factory} ultimately determines which rendering class to instantiate
+         * fall back on CPDF. 'GD' renders PDFs to graphic files. {@link * Canvas_Factory} ultimately determines which rendering class to instantiate
         * based on this setting.
         *
         * Both PDFLib & CPDF rendering backends provide sufficient rendering
@@ -117,10 +115,10 @@ return [
         * @link http://www.ros.co.nz/pdf
         * @link http://www.php.net/image
         */
-        "DOMPDF_PDF_BACKEND" => "CPDF",
+        'pdf_backend' => 'CPDF',

        /**
-         * PDFlib license key
+         * PDFlib license key.
         *
         * If you are using a licensed, commercial version of PDFlib, specify
         * your license key here.  If you are using PDFlib-Lite or are evaluating
@@ -143,7 +141,7 @@ return [
         * the desired content might be different (e.g. screen or projection view of html file).
         * Therefore allow specification of content here.
         */
-        "DOMPDF_DEFAULT_MEDIA_TYPE" => "print",
+        'default_media_type' => 'print',

        /**
         * The default paper size.
@@ -152,18 +150,19 @@ return [
         *
         * @see CPDF_Adapter::PAPER_SIZES for valid sizes ('letter', 'legal', 'A4', etc.)
         */
-        "DOMPDF_DEFAULT_PAPER_SIZE" => "a4",
+        'default_paper_size' => 'a4',

        /**
-         * The default font family
+         * The default font family.
         *
         * Used if no suitable fonts can be found. This must exist in the font folder.
+         *
         * @var string
         */
-        "DOMPDF_DEFAULT_FONT" => "dejavu sans",
+        'default_font' => 'dejavu sans',

        /**
-         * Image DPI setting
+         * Image DPI setting.
         *
         * This setting determines the default DPI setting for images and fonts.  The
         * DPI may be overridden for inline images by explictly setting the
@@ -195,10 +194,10 @@ return [
         *
         * @var int
         */
-        "DOMPDF_DPI" => 96,
+        'dpi' => 96,

        /**
-         * Enable inline PHP
+         * Enable inline PHP.
         *
         * If this setting is set to true then DOMPDF will automatically evaluate
         * inline PHP contained within <script type="text/php"> ... </script> tags.
@@ -209,20 +208,20 @@ return [
         *
         * @var bool
         */
-        "DOMPDF_ENABLE_PHP" => false,
+        'enable_php' => false,

        /**
-         * Enable inline Javascript
+         * Enable inline Javascript.
         *
         * If this setting is set to true then DOMPDF will automatically insert
         * JavaScript code contained within <script type="text/javascript"> ... </script> tags.
         *
         * @var bool
         */
-        "DOMPDF_ENABLE_JAVASCRIPT" => true,
+        'enable_javascript' => false,

        /**
-         * Enable remote file access
+         * Enable remote file access.
         *
         * If this setting is set to true, DOMPDF will access remote sites for
         * images and CSS files as required.
@@ -238,29 +237,27 @@ return [
         *
         * @var bool
         */
-        "DOMPDF_ENABLE_REMOTE" => true,
+        'enable_remote' => env('ALLOW_UNTRUSTED_SERVER_FETCHING', false),

        /**
-         * A ratio applied to the fonts height to be more like browsers' line height
+         * A ratio applied to the fonts height to be more like browsers' line height.
         */
-        "DOMPDF_FONT_HEIGHT_RATIO" => 1.1,
+        'font_height_ratio' => 1.1,

        /**
-         * Enable CSS float
+         * Enable CSS float.
         *
         * Allows people to disabled CSS float support
+         *
         * @var bool
         */
-        "DOMPDF_ENABLE_CSS_FLOAT" => true,
-
+        'enable_css_float' => true,

        /**
-         * Use the more-than-experimental HTML5 Lib parser
+         * Use the more-than-experimental HTML5 Lib parser.
         */
-        "DOMPDF_ENABLE_HTML5PARSER" => true,
-
+        'enable_html5parser' => true,

    ],

-
 ];
--- a/app/Config/filesystems.php
+++ b/app/Config/filesystems.php
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * Filesystem configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Default Filesystem Disk
+    // Options: local, local_secure, s3
+    'default' => env('STORAGE_TYPE', 'local'),
+
+    // Filesystem to use specifically for image uploads.
+    'images' => env('STORAGE_IMAGE_TYPE', env('STORAGE_TYPE', 'local')),
+
+    // Filesystem to use specifically for file attachments.
+    'attachments' => env('STORAGE_ATTACHMENT_TYPE', env('STORAGE_TYPE', 'local')),
+
+    // Storage URL
+    // This is the url to where the storage is located for when using an external
+    // file storage service, such as s3, to store publicly accessible assets.
+    'url' => env('STORAGE_URL', false),
+
+    // Default Cloud Filesystem Disk
+    'cloud' => 's3',
+
+    // Available filesystem disks
+    // Only local, local_secure & s3 are supported by BookStack
+    'disks' => [
+
+        'local' => [
+            'driver' => 'local',
+            'root'   => public_path(),
+        ],
+
+        'local_secure' => [
+            'driver' => 'local',
+            'root'   => storage_path(),
+        ],
+
+        's3' => [
+            'driver'                  => 's3',
+            'key'                     => env('STORAGE_S3_KEY', 'your-key'),
+            'secret'                  => env('STORAGE_S3_SECRET', 'your-secret'),
+            'region'                  => env('STORAGE_S3_REGION', 'your-region'),
+            'bucket'                  => env('STORAGE_S3_BUCKET', 'your-bucket'),
+            'endpoint'                => env('STORAGE_S3_ENDPOINT', null),
+            'use_path_style_endpoint' => env('STORAGE_S3_ENDPOINT', null) !== null,
+        ],
+
+    ],
+
+];
--- a/app/Config/hashing.php
+++ b/app/Config/hashing.php
@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * Hashing configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Default Hash Driver
+    // This option controls the default hash driver that will be used to hash
+    // passwords for your application. By default, the bcrypt algorithm is used.
+    // Supported: "bcrypt", "argon", "argon2id"
+    'driver' => 'bcrypt',
+
+    // Bcrypt Options
+    // Here you may specify the configuration options that should be used when
+    // passwords are hashed using the Bcrypt algorithm. This will allow you
+    // to control the amount of time it takes to hash the given password.
+    'bcrypt' => [
+        'rounds' => env('BCRYPT_ROUNDS', 10),
+    ],
+
+    // Argon Options
+    // Here you may specify the configuration options that should be used when
+    // passwords are hashed using the Argon algorithm. These will allow you
+    // to control the amount of time it takes to hash the given password.
+    'argon' => [
+        'memory'  => 1024,
+        'threads' => 2,
+        'time'    => 2,
+    ],
+
+];
--- a/app/Config/logging.php
+++ b/app/Config/logging.php
@@ -0,0 +1,111 @@
+<?php
+
+use Monolog\Formatter\LineFormatter;
+use Monolog\Handler\ErrorLogHandler;
+use Monolog\Handler\NullHandler;
+use Monolog\Handler\StreamHandler;
+
+/**
+ * Logging configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Default Log Channel
+    // This option defines the default log channel that gets used when writing
+    // messages to the logs. The name specified in this option should match
+    // one of the channels defined in the "channels" configuration array.
+    'default' => env('LOG_CHANNEL', 'single'),
+
+    // Log Channels
+    // Here you may configure the log channels for your application. Out of
+    // the box, Laravel uses the Monolog PHP logging library. This gives
+    // you a variety of powerful log handlers / formatters to utilize.
+    // Available Drivers: "single", "daily", "slack", "syslog",
+    //                    "errorlog", "monolog",
+    //                    "custom", "stack"
+    'channels' => [
+        'stack' => [
+            'driver'            => 'stack',
+            'channels'          => ['daily'],
+            'ignore_exceptions' => false,
+        ],
+
+        'single' => [
+            'driver' => 'single',
+            'path'   => storage_path('logs/laravel.log'),
+            'level'  => 'debug',
+            'days'   => 14,
+        ],
+
+        'daily' => [
+            'driver' => 'daily',
+            'path'   => storage_path('logs/laravel.log'),
+            'level'  => 'debug',
+            'days'   => 7,
+        ],
+
+        'slack' => [
+            'driver'   => 'slack',
+            'url'      => env('LOG_SLACK_WEBHOOK_URL'),
+            'username' => 'Laravel Log',
+            'emoji'    => ':boom:',
+            'level'    => 'critical',
+        ],
+
+        'stderr' => [
+            'driver'  => 'monolog',
+            'handler' => StreamHandler::class,
+            'with'    => [
+                'stream' => 'php://stderr',
+            ],
+        ],
+
+        'syslog' => [
+            'driver' => 'syslog',
+            'level'  => 'debug',
+        ],
+
+        'errorlog' => [
+            'driver' => 'errorlog',
+            'level'  => 'debug',
+        ],
+
+        // Custom errorlog implementation that logs out a plain,
+        // non-formatted message intended for the webserver log.
+        'errorlog_plain_webserver' => [
+            'driver'         => 'monolog',
+            'level'          => 'debug',
+            'handler'        => ErrorLogHandler::class,
+            'handler_with'   => [4],
+            'formatter'      => LineFormatter::class,
+            'formatter_with' => [
+                'format' => '%message%',
+            ],
+        ],
+
+        'null' => [
+            'driver'  => 'monolog',
+            'handler' => NullHandler::class,
+        ],
+
+        // Testing channel
+        // Uses a shared testing instance during tests
+        // so that logs can be checked against.
+        'testing' => [
+            'driver' => 'testing',
+        ],
+    ],
+
+    // Failed Login Message
+    // Allows a configurable message to be logged when a login request fails.
+    'failed_login' => [
+        'message' => env('LOG_FAILED_LOGIN_MESSAGE', null),
+        'channel' => env('LOG_FAILED_LOGIN_CHANNEL', 'errorlog_plain_webserver'),
+    ],
+
+];
--- a/app/Config/mail.php
+++ b/app/Config/mail.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Mail configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Mail driver to use.
+    // Options: smtp, sendmail, log, array
+    'driver' => env('MAIL_DRIVER', 'smtp'),
+
+    // SMTP host address
+    'host' => env('MAIL_HOST', 'smtp.mailgun.org'),
+
+    // SMTP host port
+    'port' => env('MAIL_PORT', 587),
+
+    // Global "From" address & name
+    'from' => [
+        'address' => env('MAIL_FROM', 'mail@bookstackapp.com'),
+        'name'    => env('MAIL_FROM_NAME', 'BookStack'),
+    ],
+
+    // Email encryption protocol
+    'encryption' => env('MAIL_ENCRYPTION', 'tls'),
+
+    // SMTP server username
+    'username' => env('MAIL_USERNAME'),
+
+    // SMTP server password
+    'password' => env('MAIL_PASSWORD'),
+
+    // Sendmail application path
+    'sendmail' => '/usr/sbin/sendmail -bs',
+
+    // Email markdown configuration
+    'markdown' => [
+        'theme' => 'default',
+        'paths' => [
+            resource_path('views/vendor/mail'),
+        ],
+    ],
+
+    // Log Channel
+    // If you are using the "log" driver, you may specify the logging channel
+    // if you prefer to keep mail messages separate from other log entries
+    // for simpler reading. Otherwise, the default channel will be used.
+    'log_channel' => env('MAIL_LOG_CHANNEL'),
+
+];
--- a/app/Config/queue.php
+++ b/app/Config/queue.php
@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * Queue configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Default driver to use for the queue
+    // Options: null, sync, redis
+    'default' => env('QUEUE_CONNECTION', 'sync'),
+
+    // Queue connection configuration
+    'connections' => [
+
+        'sync' => [
+            'driver' => 'sync',
+        ],
+
+        'database' => [
+            'driver'      => 'database',
+            'table'       => 'jobs',
+            'queue'       => 'default',
+            'retry_after' => 90,
+        ],
+
+        'redis' => [
+            'driver'      => 'redis',
+            'connection'  => 'default',
+            'queue'       => env('REDIS_QUEUE', 'default'),
+            'retry_after' => 90,
+            'block_for'   => null,
+        ],
+
+    ],
+
+    // Failed queue job logging
+    'failed' => [
+        'database' => 'mysql', 'table' => 'failed_jobs',
+    ],
+
+];
--- a/app/Config/saml2.php
+++ b/app/Config/saml2.php
@@ -0,0 +1,153 @@
+<?php
+
+$SAML2_IDP_AUTHNCONTEXT = env('SAML2_IDP_AUTHNCONTEXT', true);
+
+return [
+
+    // Display name, shown to users, for SAML2 option
+    'name' => env('SAML2_NAME', 'SSO'),
+
+    // Dump user details after a login request for debugging purposes
+    'dump_user_details' => env('SAML2_DUMP_USER_DETAILS', false),
+
+    // Attribute, within a SAML response, to find the user's email address
+    'email_attribute' => env('SAML2_EMAIL_ATTRIBUTE', 'email'),
+    // Attribute, within a SAML response, to find the user's display name
+    'display_name_attributes' => explode('|', env('SAML2_DISPLAY_NAME_ATTRIBUTES', 'username')),
+    // Attribute, within a SAML response, to use to connect a BookStack user to the SAML user.
+    'external_id_attribute' => env('SAML2_EXTERNAL_ID_ATTRIBUTE', null),
+
+    // Group sync options
+    // Enable syncing, upon login, of SAML2 groups to BookStack groups
+    'user_to_groups' => env('SAML2_USER_TO_GROUPS', false),
+    // Attribute, within a SAML response, to find group names on
+    'group_attribute' => env('SAML2_GROUP_ATTRIBUTE', 'group'),
+    // When syncing groups, remove any groups that no longer match. Otherwise sync only adds new groups.
+    'remove_from_groups' => env('SAML2_REMOVE_FROM_GROUPS', false),
+
+    // Autoload IDP details from the metadata endpoint
+    'autoload_from_metadata' => env('SAML2_AUTOLOAD_METADATA', false),
+
+    // Overrides, in JSON format, to the configuration passed to underlying onelogin library.
+    'onelogin_overrides' => env('SAML2_ONELOGIN_OVERRIDES', null),
+
+    'onelogin' => [
+        // If 'strict' is True, then the PHP Toolkit will reject unsigned
+        // or unencrypted messages if it expects them signed or encrypted
+        // Also will reject the messages if not strictly follow the SAML
+        // standard: Destination, NameId, Conditions ... are validated too.
+        'strict' => true,
+
+        // Enable debug mode (to print errors)
+        'debug' => env('APP_DEBUG', false),
+
+        // Set a BaseURL to be used instead of try to guess
+        // the BaseURL of the view that process the SAML Message.
+        // Ex. http://sp.example.com/
+        //     http://example.com/sp/
+        'baseurl' => null,
+
+        // Service Provider Data that we are deploying
+        'sp' => [
+            // Identifier of the SP entity  (must be a URI)
+            'entityId' => '',
+
+            // Specifies info about where and how the <AuthnResponse> message MUST be
+            // returned to the requester, in this case our SP.
+            'assertionConsumerService' => [
+                // URL Location where the <Response> from the IdP will be returned
+                'url' => '',
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-POST binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
+            ],
+
+            // Specifies info about where and how the <Logout Response> message MUST be
+            // returned to the requester, in this case our SP.
+            'singleLogoutService' => [
+                // URL Location where the <Response> from the IdP will be returned
+                'url' => '',
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-Redirect binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
+            ],
+
+            // Specifies constraints on the name identifier to be used to
+            // represent the requested subject.
+            // Take a look on lib/Saml2/Constants.php to see the NameIdFormat supported
+            'NameIDFormat' => 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
+            // Usually x509cert and privateKey of the SP are provided by files placed at
+            // the certs folder. But we can also provide them with the following parameters
+            'x509cert'   => '',
+            'privateKey' => '',
+        ],
+        // Identity Provider Data that we want connect with our SP
+        'idp' => [
+            // Identifier of the IdP entity  (must be a URI)
+            'entityId' => env('SAML2_IDP_ENTITYID', null),
+            // SSO endpoint info of the IdP. (Authentication Request protocol)
+            'singleSignOnService' => [
+                // URL Target of the IdP where the SP will send the Authentication Request Message
+                'url' => env('SAML2_IDP_SSO', null),
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-Redirect binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
+            ],
+            // SLO endpoint info of the IdP.
+            'singleLogoutService' => [
+                // URL Location of the IdP where the SP will send the SLO Request
+                'url' => env('SAML2_IDP_SLO', null),
+                // URL location of the IdP where the SP will send the SLO Response (ResponseLocation)
+                // if not set, url for the SLO Request will be used
+                'responseUrl' => null,
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-Redirect binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
+            ],
+            // Public x509 certificate of the IdP
+            'x509cert' => env('SAML2_IDP_x509', null),
+            /*
+             *  Instead of use the whole x509cert you can use a fingerprint in
+             *  order to validate the SAMLResponse, but we don't recommend to use
+             *  that method on production since is exploitable by a collision
+             *  attack.
+             *  (openssl x509 -noout -fingerprint -in "idp.crt" to generate it,
+             *   or add for example the -sha256 , -sha384 or -sha512 parameter)
+             *
+             *  If a fingerprint is provided, then the certFingerprintAlgorithm is required in order to
+             *  let the toolkit know which Algorithm was used. Possible values: sha1, sha256, sha384 or sha512
+             *  'sha1' is the default value.
+             */
+            // 'certFingerprint' => '',
+            // 'certFingerprintAlgorithm' => 'sha1',
+            /* In some scenarios the IdP uses different certificates for
+             * signing/encryption, or is under key rollover phase and more
+             * than one certificate is published on IdP metadata.
+             * In order to handle that the toolkit offers that parameter.
+             * (when used, 'x509cert' and 'certFingerprint' values are
+             * ignored).
+             */
+            // 'x509certMulti' => array(
+            //      'signing' => array(
+            //          0 => '<cert1-string>',
+            //      ),
+            //      'encryption' => array(
+            //          0 => '<cert2-string>',
+            //      )
+            // ),
+        ],
+        'security' => [
+            // SAML2 Authn context
+            // When set to false no AuthContext will be sent in the AuthNRequest,
+            // When set to true (Default) you will get an AuthContext 'exact' 'urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport'.
+            // Multiple forced values can be passed via a space separated array, For example:
+            // SAML2_IDP_AUTHNCONTEXT="urn:federation:authentication:windows urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport"
+            'requestedAuthnContext' => is_string($SAML2_IDP_AUTHNCONTEXT) ? explode(' ', $SAML2_IDP_AUTHNCONTEXT) : $SAML2_IDP_AUTHNCONTEXT,
+        ],
+    ],
+
+];
--- a/app/Config/services.php
+++ b/app/Config/services.php
@@ -0,0 +1,139 @@
+<?php
+
+/**
+ * Third party service configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Single option to disable non-auth external services such as Gravatar and Draw.io
+    'disable_services' => env('DISABLE_EXTERNAL_SERVICES', false),
+
+    // Draw.io integration active
+    'drawio' => env('DRAWIO', !env('DISABLE_EXTERNAL_SERVICES', false)),
+
+    // URL for fetching avatars
+    'avatar_url' => env('AVATAR_URL', ''),
+
+    // Callback URL for social authentication methods
+    'callback_url' => env('APP_URL', false),
+
+    'github'   => [
+        'client_id'     => env('GITHUB_APP_ID', false),
+        'client_secret' => env('GITHUB_APP_SECRET', false),
+        'redirect'      => env('APP_URL') . '/login/service/github/callback',
+        'name'          => 'GitHub',
+        'auto_register' => env('GITHUB_AUTO_REGISTER', false),
+        'auto_confirm'  => env('GITHUB_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'google'   => [
+        'client_id'      => env('GOOGLE_APP_ID', false),
+        'client_secret'  => env('GOOGLE_APP_SECRET', false),
+        'redirect'       => env('APP_URL') . '/login/service/google/callback',
+        'name'           => 'Google',
+        'auto_register'  => env('GOOGLE_AUTO_REGISTER', false),
+        'auto_confirm'   => env('GOOGLE_AUTO_CONFIRM_EMAIL', false),
+        'select_account' => env('GOOGLE_SELECT_ACCOUNT', false),
+    ],
+
+    'slack'   => [
+        'client_id'     => env('SLACK_APP_ID', false),
+        'client_secret' => env('SLACK_APP_SECRET', false),
+        'redirect'      => env('APP_URL') . '/login/service/slack/callback',
+        'name'          => 'Slack',
+        'auto_register' => env('SLACK_AUTO_REGISTER', false),
+        'auto_confirm'  => env('SLACK_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'facebook'   => [
+        'client_id'     => env('FACEBOOK_APP_ID', false),
+        'client_secret' => env('FACEBOOK_APP_SECRET', false),
+        'redirect'      => env('APP_URL') . '/login/service/facebook/callback',
+        'name'          => 'Facebook',
+        'auto_register' => env('FACEBOOK_AUTO_REGISTER', false),
+        'auto_confirm'  => env('FACEBOOK_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'twitter'   => [
+        'client_id'     => env('TWITTER_APP_ID', false),
+        'client_secret' => env('TWITTER_APP_SECRET', false),
+        'redirect'      => env('APP_URL') . '/login/service/twitter/callback',
+        'name'          => 'Twitter',
+        'auto_register' => env('TWITTER_AUTO_REGISTER', false),
+        'auto_confirm'  => env('TWITTER_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'azure'   => [
+        'client_id'     => env('AZURE_APP_ID', false),
+        'client_secret' => env('AZURE_APP_SECRET', false),
+        'tenant'        => env('AZURE_TENANT', false),
+        'redirect'      => env('APP_URL') . '/login/service/azure/callback',
+        'name'          => 'Microsoft Azure',
+        'auto_register' => env('AZURE_AUTO_REGISTER', false),
+        'auto_confirm'  => env('AZURE_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'okta' => [
+        'client_id'     => env('OKTA_APP_ID'),
+        'client_secret' => env('OKTA_APP_SECRET'),
+        'redirect'      => env('APP_URL') . '/login/service/okta/callback',
+        'base_url'      => env('OKTA_BASE_URL'),
+        'name'          => 'Okta',
+        'auto_register' => env('OKTA_AUTO_REGISTER', false),
+        'auto_confirm'  => env('OKTA_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'gitlab' => [
+        'client_id'     => env('GITLAB_APP_ID'),
+        'client_secret' => env('GITLAB_APP_SECRET'),
+        'redirect'      => env('APP_URL') . '/login/service/gitlab/callback',
+        'instance_uri'  => env('GITLAB_BASE_URI'), // Needed only for self hosted instances
+        'name'          => 'GitLab',
+        'auto_register' => env('GITLAB_AUTO_REGISTER', false),
+        'auto_confirm'  => env('GITLAB_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'twitch' => [
+        'client_id'     => env('TWITCH_APP_ID'),
+        'client_secret' => env('TWITCH_APP_SECRET'),
+        'redirect'      => env('APP_URL') . '/login/service/twitch/callback',
+        'name'          => 'Twitch',
+        'auto_register' => env('TWITCH_AUTO_REGISTER', false),
+        'auto_confirm'  => env('TWITCH_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'discord' => [
+        'client_id'     => env('DISCORD_APP_ID'),
+        'client_secret' => env('DISCORD_APP_SECRET'),
+        'redirect'      => env('APP_URL') . '/login/service/discord/callback',
+        'name'          => 'Discord',
+        'auto_register' => env('DISCORD_AUTO_REGISTER', false),
+        'auto_confirm'  => env('DISCORD_AUTO_CONFIRM_EMAIL', false),
+    ],
+
+    'ldap' => [
+        'server'                 => env('LDAP_SERVER', false),
+        'dump_user_details'      => env('LDAP_DUMP_USER_DETAILS', false),
+        'dn'                     => env('LDAP_DN', false),
+        'pass'                   => env('LDAP_PASS', false),
+        'base_dn'                => env('LDAP_BASE_DN', false),
+        'user_filter'            => env('LDAP_USER_FILTER', '(&(uid=${user}))'),
+        'version'                => env('LDAP_VERSION', false),
+        'id_attribute'           => env('LDAP_ID_ATTRIBUTE', 'uid'),
+        'email_attribute'        => env('LDAP_EMAIL_ATTRIBUTE', 'mail'),
+        'display_name_attribute' => env('LDAP_DISPLAY_NAME_ATTRIBUTE', 'cn'),
+        'follow_referrals'       => env('LDAP_FOLLOW_REFERRALS', false),
+        'user_to_groups'         => env('LDAP_USER_TO_GROUPS', false),
+        'group_attribute'        => env('LDAP_GROUP_ATTRIBUTE', 'memberOf'),
+        'remove_from_groups'     => env('LDAP_REMOVE_FROM_GROUPS', false),
+        'tls_insecure'           => env('LDAP_TLS_INSECURE', false),
+        'start_tls'              => env('LDAP_START_TLS', false),
+        'thumbnail_attribute'    => env('LDAP_THUMBNAIL_ATTRIBUTE', null),
+    ],
+
+];
--- a/app/Config/session.php
+++ b/app/Config/session.php
@@ -0,0 +1,88 @@
+<?php
+
+use Illuminate\Support\Str;
+
+/**
+ * Session configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    // Default session driver
+    // Options: file, cookie, database, redis, memcached, array
+    'driver' => env('SESSION_DRIVER', 'file'),
+
+    // Session lifetime, in minutes
+    'lifetime' => env('SESSION_LIFETIME', 120),
+
+    // Expire session on browser close
+    'expire_on_close' => false,
+
+    // Encrypt session data
+    'encrypt' => false,
+
+    // Location to store session files
+    'files' => storage_path('framework/sessions'),
+
+    // Session Database Connection
+    // When using the "database" or "redis" session drivers, you can specify a
+    // connection that should be used to manage these sessions. This should
+    // correspond to a connection in your database configuration options.
+    'connection' => null,
+
+    // Session database table, if database driver is in use
+    'table' => 'sessions',
+
+    // Session Cache Store
+    // When using the "apc" or "memcached" session drivers, you may specify a
+    // cache store that should be used for these sessions. This value must
+    // correspond with one of the application's configured cache stores.
+    'store' => null,
+
+    // Session Sweeping Lottery
+    // Some session drivers must manually sweep their storage location to get
+    // rid of old sessions from storage. Here are the chances that it will
+    // happen on a given request. By default, the odds are 2 out of 100.
+    'lottery' => [2, 100],
+
+    // Session Cookie Name
+    // Here you may change the name of the cookie used to identify a session
+    // instance by ID. The name specified here will get used every time a
+    // new session cookie is created by the framework for every driver.
+    'cookie' => env('SESSION_COOKIE_NAME', 'bookstack_session'),
+
+    // Session Cookie Path
+    // The session cookie path determines the path for which the cookie will
+    // be regarded as available. Typically, this will be the root path of
+    // your application but you are free to change this when necessary.
+    'path' => '/' . (explode('/', env('APP_URL', ''), 4)[3] ?? ''),
+
+    // Session Cookie Domain
+    // Here you may change the domain of the cookie used to identify a session
+    // in your application. This will determine which domains the cookie is
+    // available to in your application. A sensible default has been set.
+    'domain' => env('SESSION_DOMAIN', null),
+
+    // HTTPS Only Cookies
+    // By setting this option to true, session cookies will only be sent back
+    // to the server if the browser has a HTTPS connection. This will keep
+    // the cookie from being sent to you if it can not be done securely.
+    'secure' => env('SESSION_SECURE_COOKIE', null)
+        ?? Str::startsWith(env('APP_URL'), 'https:'),
+
+    // HTTP Access Only
+    // Setting this value to true will prevent JavaScript from accessing the
+    // value of the cookie and the cookie will only be accessible through the HTTP protocol.
+    'http_only' => true,
+
+    // Same-Site Cookies
+    // This option determines how your cookies behave when cross-site requests
+    // take place, and can be used to mitigate CSRF attacks. By default, we
+    // do not enable this as other CSRF protection services are in place.
+    // Options: lax, strict, none
+    'same_site' => 'lax',
+];
--- a/app/Config/setting-defaults.php
+++ b/app/Config/setting-defaults.php
@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * Default system settings.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+return [
+
+    'app-name'             => 'BookStack',
+    'app-logo'             => '',
+    'app-name-header'      => true,
+    'app-editor'           => 'wysiwyg',
+    'app-color'            => '#206ea7',
+    'app-color-light'      => 'rgba(32,110,167,0.15)',
+    'bookshelf-color'      => '#a94747',
+    'book-color'           => '#077b70',
+    'chapter-color'        => '#af4d0d',
+    'page-color'           => '#206ea7',
+    'page-draft-color'     => '#7e50b1',
+    'app-custom-head'      => false,
+    'registration-enabled' => false,
+
+    // User-level default settings
+    'user' => [
+        'dark-mode-enabled'     => env('APP_DEFAULT_DARK_MODE', false),
+        'bookshelves_view_type' => env('APP_VIEWS_BOOKSHELVES', 'grid'),
+        'bookshelf_view_type'   => env('APP_VIEWS_BOOKSHELF', 'grid'),
+        'books_view_type'       => env('APP_VIEWS_BOOKS', 'grid'),
+    ],
+
+];
--- a/app/Config/snappy.php
+++ b/app/Config/snappy.php
@@ -1,11 +1,21 @@
 <?php

+/**
+ * SnappyPDF configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
 return [
    'pdf' => [
        'enabled' => true,
        'binary'  => file_exists(base_path('wkhtmltopdf')) ? base_path('wkhtmltopdf') : env('WKHTMLTOPDF', false),
        'timeout' => false,
-        'options' => [],
+        'options' => [
+            'outline' => true,
+        ],
        'env'     => [],
    ],
    'image' => [
--- a/app/Config/view.php
+++ b/app/Config/view.php
@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * View configuration options.
+ *
+ * Changes to these config files are not supported by BookStack and may break upon updates.
+ * Configuration should be altered via the `.env` file or environment variables.
+ * Do not edit this file unless you're happy to maintain any changes yourself.
+ */
+
+// Join up possible view locations
+$viewPaths = [realpath(base_path('resources/views'))];
+if ($theme = env('APP_THEME', false)) {
+    array_unshift($viewPaths, base_path('themes/' . $theme));
+}
+
+return [
+
+    // App theme
+    // This option defines the theme to use for the application. When a theme
+    // is set there must be a `themes/<theme_name>` folder to hold the
+    // custom theme overrides.
+    'theme' => env('APP_THEME', false),
+
+    // View Storage Paths
+    // Most templating systems load templates from disk. Here you may specify
+    // an array of paths that should be checked for your views. Of course
+    // the usual Laravel view path has already been registered for you.
+    'paths' => $viewPaths,
+
+    // Compiled View Path
+    // This option determines where all the compiled Blade templates will be
+    // stored for your application. Typically, this is within the storage
+    // directory. However, as usual, you are free to change this value.
+    'compiled' => realpath(storage_path('framework/views')),
+
+];
--- a/app/Console/Commands/CleanupImages.php
+++ b/app/Console/Commands/CleanupImages.php
@@ -2,7 +2,7 @@

 namespace BookStack\Console\Commands;

-use BookStack\Services\ImageService;
+use BookStack\Uploads\ImageService;
 use Illuminate\Console\Command;
 use Symfony\Component\Console\Output\OutputInterface;

@@ -14,8 +14,8 @@ class CleanupImages extends Command
     * @var string
     */
    protected $signature = 'bookstack:cleanup-images
-                            {--a|all : Include images that are used in page revisions}
-                            {--f|force : Actually run the deletions}
+                            {--a|all : Also delete images that are only used in old revisions}
+                            {--f|force : Actually run the deletions, Defaults to a dry-run}
                            ';

    /**
@@ -25,12 +25,12 @@ class CleanupImages extends Command
     */
    protected $description = 'Cleanup images and drawings';

-
    protected $imageService;

    /**
     * Create a new command instance.
-     * @param ImageService $imageService
+     *
+     * @param \BookStack\Uploads\ImageService $imageService
     */
    public function __construct(ImageService $imageService)
    {
@@ -63,6 +63,7 @@ class CleanupImages extends Command
            $this->comment($deleteCount . ' images found that would have been deleted');
            $this->showDeletedImages($deleted);
            $this->comment('Run with -f or --force to perform deletions');
+
            return;
        }

@@ -72,7 +73,9 @@ class CleanupImages extends Command

    protected function showDeletedImages($paths)
    {
-        if ($this->getOutput()->getVerbosity() <= OutputInterface::VERBOSITY_NORMAL) return;
+        if ($this->getOutput()->getVerbosity() <= OutputInterface::VERBOSITY_NORMAL) {
+            return;
+        }
        if (count($paths) > 0) {
            $this->line('Images to delete:');
        }
--- a/app/Console/Commands/ClearActivity.php
+++ b/app/Console/Commands/ClearActivity.php
@@ -2,7 +2,7 @@

 namespace BookStack\Console\Commands;

-use BookStack\Activity;
+use BookStack\Actions\Activity;
 use Illuminate\Console\Command;

 class ClearActivity extends Command
--- a/app/Console/Commands/ClearRevisions.php
+++ b/app/Console/Commands/ClearRevisions.php
@@ -2,7 +2,7 @@

 namespace BookStack\Console\Commands;

-use BookStack\PageRevision;
+use BookStack\Entities\Models\PageRevision;
 use Illuminate\Console\Command;

 class ClearRevisions extends Command
--- a/app/Console/Commands/ClearViews.php
+++ b/app/Console/Commands/ClearViews.php
@@ -2,6 +2,7 @@

 namespace BookStack\Console\Commands;

+use BookStack\Actions\View;
 use Illuminate\Console\Command;

 class ClearViews extends Command
@@ -18,11 +19,10 @@ class ClearViews extends Command
     *
     * @var string
     */
-    protected $description = 'Clear all view-counts for all entities.';
+    protected $description = 'Clear all view-counts for all entities';

    /**
     * Create a new command instance.
-     *
     */
    public function __construct()
    {
@@ -36,7 +36,7 @@ class ClearViews extends Command
     */
    public function handle()
    {
-        \Views::resetAll();
+        View::clearAll();
        $this->comment('Views cleared');
    }
 }
--- a/app/Console/Commands/CopyShelfPermissions.php
+++ b/app/Console/Commands/CopyShelfPermissions.php
@@ -0,0 +1,89 @@
+<?php
+
+namespace BookStack\Console\Commands;
+
+use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Repos\BookshelfRepo;
+use Illuminate\Console\Command;
+
+class CopyShelfPermissions extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'bookstack:copy-shelf-permissions
+                            {--a|all : Perform for all shelves in the system}
+                            {--s|slug= : The slug for a shelf to target}
+                            ';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Copy shelf permissions to all child books';
+
+    /**
+     * @var BookshelfRepo
+     */
+    protected $bookshelfRepo;
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct(BookshelfRepo $repo)
+    {
+        $this->bookshelfRepo = $repo;
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $shelfSlug = $this->option('slug');
+        $cascadeAll = $this->option('all');
+        $shelves = null;
+
+        if (!$cascadeAll && !$shelfSlug) {
+            $this->error('Either a --slug or --all option must be provided.');
+
+            return;
+        }
+
+        if ($cascadeAll) {
+            $continue = $this->confirm(
+                'Permission settings for all shelves will be cascaded. ' .
+                        'Books assigned to multiple shelves will receive only the permissions of it\'s last processed shelf. ' .
+                        'Are you sure you want to proceed?'
+            );
+
+            if (!$continue && !$this->hasOption('no-interaction')) {
+                return;
+            }
+
+            $shelves = Bookshelf::query()->get(['id', 'restricted']);
+        }
+
+        if ($shelfSlug) {
+            $shelves = Bookshelf::query()->where('slug', '=', $shelfSlug)->get(['id', 'restricted']);
+            if ($shelves->count() === 0) {
+                $this->info('No shelves found with the given slug.');
+            }
+        }
+
+        foreach ($shelves as $shelf) {
+            $this->bookshelfRepo->copyDownPermissions($shelf, false);
+            $this->info('Copied permissions for shelf [' . $shelf->id . ']');
+        }
+
+        $this->info('Permissions copied for ' . $shelves->count() . ' shelves.');
+    }
+}
--- a/app/Console/Commands/CreateAdmin.php
+++ b/app/Console/Commands/CreateAdmin.php
@@ -2,7 +2,7 @@

 namespace BookStack\Console\Commands;

-use BookStack\Repos\UserRepo;
+use BookStack\Auth\UserRepo;
 use Illuminate\Console\Command;

 class CreateAdmin extends Command
@@ -28,8 +28,6 @@ class CreateAdmin extends Command

    /**
     * Create a new command instance.
-     *
-     * @param UserRepo $userRepo
     */
    public function __construct(UserRepo $userRepo)
    {
@@ -40,8 +38,9 @@ class CreateAdmin extends Command
    /**
     * Execute the console command.
     *
-     * @return mixed
     * @throws \BookStack\Exceptions\NotFoundException
+     *
+     * @return mixed
     */
    public function handle()
    {
@@ -49,7 +48,7 @@ class CreateAdmin extends Command
        if (empty($email)) {
            $email = $this->ask('Please specify an email address for the new admin user');
        }
-        if (strlen($email) < 5 || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
+        if (mb_strlen($email) < 5 || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
            return $this->error('Invalid email address provided');
        }

@@ -61,7 +60,7 @@ class CreateAdmin extends Command
        if (empty($name)) {
            $name = $this->ask('Please specify an name for the new admin user');
        }
-        if (strlen($name) < 2) {
+        if (mb_strlen($name) < 2) {
            return $this->error('Invalid name provided');
        }

@@ -69,14 +68,13 @@ class CreateAdmin extends Command
        if (empty($password)) {
            $password = $this->secret('Please specify a password for the new admin user');
        }
-        if (strlen($password) < 5) {
+        if (mb_strlen($password) < 5) {
            return $this->error('Invalid password provided, Must be at least 5 characters');
        }

-
        $user = $this->userRepo->create(['email' => $email, 'name' => $name, 'password' => $password]);
        $this->userRepo->attachSystemRole($user, 'admin');
-        $this->userRepo->downloadGravatarToUserAvatar($user);
+        $this->userRepo->downloadAndAssignUserAvatar($user);
        $user->email_confirmed = true;
        $user->save();

--- a/app/Console/Commands/DeleteUsers.php
+++ b/app/Console/Commands/DeleteUsers.php
@@ -2,13 +2,12 @@

 namespace BookStack\Console\Commands;

-use BookStack\User;
-use BookStack\Repos\UserRepo;
+use BookStack\Auth\User;
+use BookStack\Auth\UserRepo;
 use Illuminate\Console\Command;

 class DeleteUsers extends Command
 {
-
    /**
     * The name and signature of the console command.
     *
@@ -25,7 +24,7 @@ class DeleteUsers extends Command
     *
     * @var string
     */
-    protected $description = 'Delete users that are not "admin" or system users.';
+    protected $description = 'Delete users that are not "admin" or system users';

    public function __construct(User $user, UserRepo $userRepo)
    {
@@ -47,7 +46,7 @@ class DeleteUsers extends Command
                    continue;
                }
                $this->userRepo->destroy($user);
-                ++$numDeleted;
+                $numDeleted++;
            }
            $this->info("Deleted $numDeleted of $totalUsers total users.");
        } else {
--- a/app/Console/Commands/RegenerateCommentContent.php
+++ b/app/Console/Commands/RegenerateCommentContent.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace BookStack\Console\Commands;
+
+use BookStack\Actions\Comment;
+use BookStack\Actions\CommentRepo;
+use Illuminate\Console\Command;
+
+class RegenerateCommentContent extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'bookstack:regenerate-comment-content {--database= : The database connection to use.}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Regenerate the stored HTML of all comments';
+
+    /**
+     * @var CommentRepo
+     */
+    protected $commentRepo;
+
+    /**
+     * Create a new command instance.
+     */
+    public function __construct(CommentRepo $commentRepo)
+    {
+        $this->commentRepo = $commentRepo;
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $connection = \DB::getDefaultConnection();
+        if ($this->option('database') !== null) {
+            \DB::setDefaultConnection($this->option('database'));
+        }
+
+        Comment::query()->chunk(100, function ($comments) {
+            foreach ($comments as $comment) {
+                $comment->html = $this->commentRepo->commentToHtml($comment->text);
+                $comment->save();
+            }
+        });
+
+        \DB::setDefaultConnection($connection);
+        $this->comment('Comment HTML content has been regenerated');
+    }
+}
--- a/app/Console/Commands/RegeneratePermissions.php
+++ b/app/Console/Commands/RegeneratePermissions.php
@@ -2,7 +2,7 @@

 namespace BookStack\Console\Commands;

-use BookStack\Services\PermissionService;
+use BookStack\Auth\Permissions\PermissionService;
 use Illuminate\Console\Command;

 class RegeneratePermissions extends Command
@@ -30,8 +30,6 @@ class RegeneratePermissions extends Command

    /**
     * Create a new command instance.
-     *
-     * @param PermissionService $permissionService
     */
    public function __construct(PermissionService $permissionService)
    {
--- a/app/Console/Commands/RegenerateSearch.php
+++ b/app/Console/Commands/RegenerateSearch.php
@@ -2,7 +2,8 @@

 namespace BookStack\Console\Commands;

-use BookStack\Services\SearchService;
+use BookStack\Entities\Tools\SearchIndex;
+use DB;
 use Illuminate\Console\Command;

 class RegenerateSearch extends Command
@@ -21,17 +22,15 @@ class RegenerateSearch extends Command
     */
    protected $description = 'Re-index all content for searching';

-    protected $searchService;
+    protected $searchIndex;

    /**
     * Create a new command instance.
-     *
-     * @param SearchService $searchService
     */
-    public function __construct(SearchService $searchService)
+    public function __construct(SearchIndex $searchIndex)
    {
        parent::__construct();
-        $this->searchService = $searchService;
+        $this->searchIndex = $searchIndex;
    }

    /**
@@ -41,14 +40,13 @@ class RegenerateSearch extends Command
     */
    public function handle()
    {
-        $connection = \DB::getDefaultConnection();
+        $connection = DB::getDefaultConnection();
        if ($this->option('database') !== null) {
-            \DB::setDefaultConnection($this->option('database'));
-            $this->searchService->setConnection(\DB::connection($this->option('database')));
+            DB::setDefaultConnection($this->option('database'));
        }

-        $this->searchService->indexAllEntities();
-        \DB::setDefaultConnection($connection);
+        $this->searchIndex->indexAllEntities();
+        DB::setDefaultConnection($connection);
        $this->comment('Search index regenerated');
    }
 }
--- a/app/Console/Commands/ResetMfa.php
+++ b/app/Console/Commands/ResetMfa.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace BookStack\Console\Commands;
+
+use BookStack\Auth\User;
+use Illuminate\Console\Command;
+
+class ResetMfa extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'bookstack:reset-mfa
+                            {--id= : Numeric ID of the user to reset MFA for}
+                            {--email= : Email address of the user to reset MFA for} 
+                            ';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Reset & Clear any configured MFA methods for the given user';
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $id = $this->option('id');
+        $email = $this->option('email');
+        if (!$id && !$email) {
+            $this->error('Either a --id=<number> or --email=<email> option must be provided.');
+
+            return 1;
+        }
+
+        /** @var User $user */
+        $field = $id ? 'id' : 'email';
+        $value = $id ?: $email;
+        $user = User::query()
+            ->where($field, '=', $value)
+            ->first();
+
+        if (!$user) {
+            $this->error("A user where {$field}={$value} could not be found.");
+
+            return 1;
+        }
+
+        $this->info("This will delete any configure multi-factor authentication methods for user: \n- ID: {$user->id}\n- Name: {$user->name}\n- Email: {$user->email}\n");
+        $this->info('If multi-factor authentication is required for this user they will be asked to reconfigure their methods on next login.');
+        $confirm = $this->confirm('Are you sure you want to proceed?');
+        if ($confirm) {
+            $user->mfaValues()->delete();
+            $this->info('User MFA methods have been reset.');
+
+            return 0;
+        }
+
+        return 1;
+    }
+}
--- a/app/Console/Commands/UpdateUrl.php
+++ b/app/Console/Commands/UpdateUrl.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace BookStack\Console\Commands;
+
+use Illuminate\Console\Command;
+use Illuminate\Database\Connection;
+
+class UpdateUrl extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'bookstack:update-url
+                            {oldUrl : URL to replace}
+                            {newUrl : URL to use as the replacement}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Find and replace the given URLs in your BookStack database';
+
+    protected $db;
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct(Connection $db)
+    {
+        $this->db = $db;
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $oldUrl = str_replace("'", '', $this->argument('oldUrl'));
+        $newUrl = str_replace("'", '', $this->argument('newUrl'));
+
+        $urlPattern = '/https?:\/\/(.+)/';
+        if (!preg_match($urlPattern, $oldUrl) || !preg_match($urlPattern, $newUrl)) {
+            $this->error('The given urls are expected to be full urls starting with http:// or https://');
+
+            return 1;
+        }
+
+        if (!$this->checkUserOkayToProceed($oldUrl, $newUrl)) {
+            return 1;
+        }
+
+        $columnsToUpdateByTable = [
+            'attachments' => ['path'],
+            'pages'       => ['html', 'text', 'markdown'],
+            'images'      => ['url'],
+            'settings'    => ['value'],
+            'comments'    => ['html', 'text'],
+        ];
+
+        foreach ($columnsToUpdateByTable as $table => $columns) {
+            foreach ($columns as $column) {
+                $changeCount = $this->replaceValueInTable($table, $column, $oldUrl, $newUrl);
+                $this->info("Updated {$changeCount} rows in {$table}->{$column}");
+            }
+        }
+
+        $jsonColumnsToUpdateByTable = [
+            'settings' => ['value'],
+        ];
+
+        foreach ($jsonColumnsToUpdateByTable as $table => $columns) {
+            foreach ($columns as $column) {
+                $oldJson = trim(json_encode($oldUrl), '"');
+                $newJson = trim(json_encode($newUrl), '"');
+                $changeCount = $this->replaceValueInTable($table, $column, $oldJson, $newJson);
+                $this->info("Updated {$changeCount} JSON encoded rows in {$table}->{$column}");
+            }
+        }
+
+        $this->info('URL update procedure complete.');
+        $this->info('============================================================================');
+        $this->info('Be sure to run "php artisan cache:clear" to clear any old URLs in the cache.');
+        $this->info('============================================================================');
+
+        return 0;
+    }
+
+    /**
+     * Perform a find+replace operations in the provided table and column.
+     * Returns the count of rows changed.
+     */
+    protected function replaceValueInTable(string $table, string $column, string $oldUrl, string $newUrl): int
+    {
+        $oldQuoted = $this->db->getPdo()->quote($oldUrl);
+        $newQuoted = $this->db->getPdo()->quote($newUrl);
+
+        return $this->db->table($table)->update([
+            $column => $this->db->raw("REPLACE({$column}, {$oldQuoted}, {$newQuoted})"),
+        ]);
+    }
+
+    /**
+     * Warn the user of the dangers of this operation.
+     * Returns a boolean indicating if they've accepted the warnings.
+     */
+    protected function checkUserOkayToProceed(string $oldUrl, string $newUrl): bool
+    {
+        $dangerWarning = "This will search for \"{$oldUrl}\" in your database and replace it with  \"{$newUrl}\".\n";
+        $dangerWarning .= 'Are you sure you want to proceed?';
+        $backupConfirmation = 'This operation could cause issues if used incorrectly. Have you made a backup of your existing database?';
+
+        return $this->confirm($dangerWarning) && $this->confirm($backupConfirmation);
+    }
+}
--- a/app/Console/Commands/UpgradeDatabaseEncoding.php
+++ b/app/Console/Commands/UpgradeDatabaseEncoding.php
@@ -23,7 +23,6 @@ class UpgradeDatabaseEncoding extends Command

    /**
     * Create a new command instance.
-     *
     */
    public function __construct()
    {
@@ -44,12 +43,12 @@ class UpgradeDatabaseEncoding extends Command

        $database = DB::getDatabaseName();
        $tables = DB::select('SHOW TABLES');
-        $this->line('ALTER DATABASE `'.$database.'` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
-        $this->line('USE `'.$database.'`;');
+        $this->line('ALTER DATABASE `' . $database . '` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
+        $this->line('USE `' . $database . '`;');
        $key = 'Tables_in_' . $database;
        foreach ($tables as $table) {
            $tableName = $table->$key;
-            $this->line('ALTER TABLE `'.$tableName.'` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
+            $this->line('ALTER TABLE `' . $tableName . '` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
        }

        DB::setDefaultConnection($connection);
--- a/app/Console/Kernel.php
+++ b/app/Console/Kernel.php
@@ -1,4 +1,6 @@
-<?php namespace BookStack\Console;
+<?php
+
+namespace BookStack\Console;

 use Illuminate\Console\Scheduling\Schedule;
 use Illuminate\Foundation\Console\Kernel as ConsoleKernel;
@@ -17,7 +19,8 @@ class Kernel extends ConsoleKernel
    /**
     * Define the application's command schedule.
     *
-     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
+     * @param \Illuminate\Console\Scheduling\Schedule $schedule
+     *
     * @return void
     */
    protected function schedule(Schedule $schedule)
@@ -32,6 +35,6 @@ class Kernel extends ConsoleKernel
     */
    protected function commands()
    {
-        $this->load(__DIR__.'/Commands');
+        $this->load(__DIR__ . '/Commands');
    }
 }
--- a/app/Entities/BreadcrumbsViewComposer.php
+++ b/app/Entities/BreadcrumbsViewComposer.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace BookStack\Entities;
+
+use BookStack\Entities\Models\Book;
+use BookStack\Entities\Tools\ShelfContext;
+use Illuminate\View\View;
+
+class BreadcrumbsViewComposer
+{
+    protected $entityContextManager;
+
+    /**
+     * BreadcrumbsViewComposer constructor.
+     *
+     * @param ShelfContext $entityContextManager
+     */
+    public function __construct(ShelfContext $entityContextManager)
+    {
+        $this->entityContextManager = $entityContextManager;
+    }
+
+    /**
+     * Modify data when the view is composed.
+     *
+     * @param View $view
+     */
+    public function compose(View $view)
+    {
+        $crumbs = $view->getData()['crumbs'];
+        $firstCrumb = $crumbs[0] ?? null;
+        if ($firstCrumb instanceof Book) {
+            $shelf = $this->entityContextManager->getContextualShelfForBook($firstCrumb);
+            if ($shelf) {
+                array_unshift($crumbs, $shelf);
+                $view->with('crumbs', $crumbs);
+            }
+        }
+    }
+}
--- a/app/Entities/EntityProvider.php
+++ b/app/Entities/EntityProvider.php
@@ -0,0 +1,94 @@
+<?php
+
+namespace BookStack\Entities;
+
+use BookStack\Entities\Models\Book;
+use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Models\Chapter;
+use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\Page;
+use BookStack\Entities\Models\PageRevision;
+
+/**
+ * Class EntityProvider.
+ *
+ * Provides access to the core entity models.
+ * Wrapped up in this provider since they are often used together
+ * so this is a neater alternative to injecting all in individually.
+ */
+class EntityProvider
+{
+    /**
+     * @var Bookshelf
+     */
+    public $bookshelf;
+
+    /**
+     * @var Book
+     */
+    public $book;
+
+    /**
+     * @var Chapter
+     */
+    public $chapter;
+
+    /**
+     * @var Page
+     */
+    public $page;
+
+    /**
+     * @var PageRevision
+     */
+    public $pageRevision;
+
+    public function __construct()
+    {
+        $this->bookshelf = new Bookshelf();
+        $this->book = new Book();
+        $this->chapter = new Chapter();
+        $this->page = new Page();
+        $this->pageRevision = new PageRevision();
+    }
+
+    /**
+     * Fetch all core entity types as an associated array
+     * with their basic names as the keys.
+     *
+     * @return array<Entity>
+     */
+    public function all(): array
+    {
+        return [
+            'bookshelf' => $this->bookshelf,
+            'book'      => $this->book,
+            'chapter'   => $this->chapter,
+            'page'      => $this->page,
+        ];
+    }
+
+    /**
+     * Get an entity instance by it's basic name.
+     */
+    public function get(string $type): Entity
+    {
+        $type = strtolower($type);
+
+        return $this->all()[$type];
+    }
+
+    /**
+     * Get the morph classes, as an array, for a single or multiple types.
+     */
+    public function getMorphClasses(array $types): array
+    {
+        $morphClasses = [];
+        foreach ($types as $type) {
+            $model = $this->get($type);
+            $morphClasses[] = $model->getMorphClass();
+        }
+
+        return $morphClasses;
+    }
+}
--- a/app/Entities/Models/Book.php
+++ b/app/Entities/Models/Book.php
@@ -0,0 +1,126 @@
+<?php
+
+namespace BookStack\Entities\Models;
+
+use BookStack\Uploads\Image;
+use Exception;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Collection;
+
+/**
+ * Class Book.
+ *
+ * @property string     $description
+ * @property int        $image_id
+ * @property Image|null $cover
+ */
+class Book extends Entity implements HasCoverImage
+{
+    public $searchFactor = 2;
+
+    protected $fillable = ['name', 'description'];
+    protected $hidden = ['restricted', 'pivot', 'image_id', 'deleted_at'];
+
+    /**
+     * Get the url for this book.
+     */
+    public function getUrl(string $path = ''): string
+    {
+        return url('/books/' . implode('/', [urlencode($this->slug), trim($path, '/')]));
+    }
+
+    /**
+     * Returns book cover image, if book cover not exists return default cover image.
+     *
+     * @param int $width  - Width of the image
+     * @param int $height - Height of the image
+     *
+     * @return string
+     */
+    public function getBookCover($width = 440, $height = 250)
+    {
+        $default = 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==';
+        if (!$this->image_id) {
+            return $default;
+        }
+
+        try {
+            $cover = $this->cover ? url($this->cover->getThumb($width, $height, false)) : $default;
+        } catch (Exception $err) {
+            $cover = $default;
+        }
+
+        return $cover;
+    }
+
+    /**
+     * Get the cover image of the book.
+     */
+    public function cover(): BelongsTo
+    {
+        return $this->belongsTo(Image::class, 'image_id');
+    }
+
+    /**
+     * Get the type of the image model that is used when storing a cover image.
+     */
+    public function coverImageTypeKey(): string
+    {
+        return 'cover_book';
+    }
+
+    /**
+     * Get all pages within this book.
+     *
+     * @return HasMany
+     */
+    public function pages()
+    {
+        return $this->hasMany(Page::class);
+    }
+
+    /**
+     * Get the direct child pages of this book.
+     *
+     * @return HasMany
+     */
+    public function directPages()
+    {
+        return $this->pages()->where('chapter_id', '=', '0');
+    }
+
+    /**
+     * Get all chapters within this book.
+     *
+     * @return HasMany
+     */
+    public function chapters()
+    {
+        return $this->hasMany(Chapter::class);
+    }
+
+    /**
+     * Get the shelves this book is contained within.
+     *
+     * @return BelongsToMany
+     */
+    public function shelves()
+    {
+        return $this->belongsToMany(Bookshelf::class, 'bookshelves_books', 'book_id', 'bookshelf_id');
+    }
+
+    /**
+     * Get the direct child items within this book.
+     *
+     * @return Collection
+     */
+    public function getDirectChildren(): Collection
+    {
+        $pages = $this->directPages()->visible()->get();
+        $chapters = $this->chapters()->visible()->get();
+
+        return $pages->concat($chapters)->sortBy('priority')->sortByDesc('draft');
+    }
+}
--- a/app/Entities/Models/BookChild.php
+++ b/app/Entities/Models/BookChild.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace BookStack\Entities\Models;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * Class BookChild.
+ *
+ * @property int    $book_id
+ * @property int    $priority
+ * @property string $book_slug
+ * @property Book   $book
+ *
+ * @method Builder whereSlugs(string $bookSlug, string $childSlug)
+ */
+abstract class BookChild extends Entity
+{
+    protected static function boot()
+    {
+        parent::boot();
+
+        // Load book slugs onto these models by default during query-time
+        static::addGlobalScope('book_slug', function (Builder $builder) {
+            $builder->addSelect(['book_slug' => function ($builder) {
+                $builder->select('slug')
+                    ->from('books')
+                    ->whereColumn('books.id', '=', 'book_id');
+            }]);
+        });
+    }
+
+    /**
+     * Scope a query to find items where the child has the given childSlug
+     * where its parent has the bookSlug.
+     */
+    public function scopeWhereSlugs(Builder $query, string $bookSlug, string $childSlug)
+    {
+        return $query->with('book')
+            ->whereHas('book', function (Builder $query) use ($bookSlug) {
+                $query->where('slug', '=', $bookSlug);
+            })
+            ->where('slug', '=', $childSlug);
+    }
+
+    /**
+     * Get the book this page sits in.
+     */
+    public function book(): BelongsTo
+    {
+        return $this->belongsTo(Book::class)->withTrashed();
+    }
+
+    /**
+     * Change the book that this entity belongs to.
+     */
+    public function changeBook(int $newBookId): Entity
+    {
+        $this->book_id = $newBookId;
+        $this->refreshSlug();
+        $this->save();
+        $this->refresh();
+
+        // Update all child pages if a chapter
+        if ($this instanceof Chapter) {
+            foreach ($this->pages()->withTrashed()->get() as $page) {
+                $page->changeBook($newBookId);
+            }
+        }
+
+        return $this;
+    }
+}
--- a/app/Entities/Models/Bookshelf.php
+++ b/app/Entities/Models/Bookshelf.php
@@ -0,0 +1,115 @@
+<?php
+
+namespace BookStack\Entities\Models;
+
+use BookStack\Uploads\Image;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class Bookshelf extends Entity implements HasCoverImage
+{
+    protected $table = 'bookshelves';
+
+    public $searchFactor = 3;
+
+    protected $fillable = ['name', 'description', 'image_id'];
+
+    protected $hidden = ['restricted', 'image_id', 'deleted_at'];
+
+    /**
+     * Get the books in this shelf.
+     * Should not be used directly since does not take into account permissions.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     */
+    public function books()
+    {
+        return $this->belongsToMany(Book::class, 'bookshelves_books', 'bookshelf_id', 'book_id')
+            ->withPivot('order')
+            ->orderBy('order', 'asc');
+    }
+
+    /**
+     * Related books that are visible to the current user.
+     */
+    public function visibleBooks(): BelongsToMany
+    {
+        return $this->books()->visible();
+    }
+
+    /**
+     * Get the url for this bookshelf.
+     */
+    public function getUrl(string $path = ''): string
+    {
+        return url('/shelves/' . implode('/', [urlencode($this->slug), trim($path, '/')]));
+    }
+
+    /**
+     * Returns BookShelf cover image, if cover does not exists return default cover image.
+     *
+     * @param int $width  - Width of the image
+     * @param int $height - Height of the image
+     *
+     * @return string
+     */
+    public function getBookCover($width = 440, $height = 250)
+    {
+        // TODO - Make generic, focused on books right now, Perhaps set-up a better image
+        $default = 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==';
+        if (!$this->image_id) {
+            return $default;
+        }
+
+        try {
+            $cover = $this->cover ? url($this->cover->getThumb($width, $height, false)) : $default;
+        } catch (\Exception $err) {
+            $cover = $default;
+        }
+
+        return $cover;
+    }
+
+    /**
+     * Get the cover image of the shelf.
+     */
+    public function cover(): BelongsTo
+    {
+        return $this->belongsTo(Image::class, 'image_id');
+    }
+
+    /**
+     * Get the type of the image model that is used when storing a cover image.
+     */
+    public function coverImageTypeKey(): string
+    {
+        return 'cover_shelf';
+    }
+
+    /**
+     * Check if this shelf contains the given book.
+     *
+     * @param Book $book
+     *
+     * @return bool
+     */
+    public function contains(Book $book): bool
+    {
+        return $this->books()->where('id', '=', $book->id)->count() > 0;
+    }
+
+    /**
+     * Add a book to the end of this shelf.
+     *
+     * @param Book $book
+     */
+    public function appendBook(Book $book)
+    {
+        if ($this->contains($book)) {
+            return;
+        }
+
+        $maxOrder = $this->books()->max('order');
+        $this->books()->attach($book->id, ['order' => $maxOrder + 1]);
+    }
+}
--- a/app/Entities/Models/Chapter.php
+++ b/app/Entities/Models/Chapter.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace BookStack\Entities\Models;
+
+use Illuminate\Support\Collection;
+
+/**
+ * Class Chapter.
+ *
+ * @property Collection<Page> $pages
+ * @property mixed description
+ */
+class Chapter extends BookChild
+{
+    public $searchFactor = 1.3;
+
+    protected $fillable = ['name', 'description', 'priority', 'book_id'];
+    protected $hidden = ['restricted', 'pivot', 'deleted_at'];
+
+    /**
+     * Get the pages that this chapter contains.
+     *
+     * @param string $dir
+     *
+     * @return mixed
+     */
+    public function pages($dir = 'ASC')
+    {
+        return $this->hasMany(Page::class)->orderBy('priority', $dir);
+    }
+
+    /**
+     * Get the url of this chapter.
+     */
+    public function getUrl($path = ''): string
+    {
+        $parts = [
+            'books',
+            urlencode($this->book_slug ?? $this->book->slug),
+            'chapter',
+            urlencode($this->slug),
+            trim($path, '/'),
+        ];
+
+        return url('/' . implode('/', $parts));
+    }
+
+    /**
+     * Get the visible pages in this chapter.
+     */
+    public function getVisiblePages(): Collection
+    {
+        return $this->pages()->visible()
+        ->orderBy('draft', 'desc')
+        ->orderBy('priority', 'asc')
+        ->get();
+    }
+}
--- a/Show More
+++ b/Show More