Updated version and assets for release v21.05.2

Also done a little code cleanup.

.env.example.complete

@@ -51,7 +51,7 @@ DB_USERNAME=database_username
 DB_PASSWORD=database_user_password
 
 # Mail system to use
-# Can be 'smtp', 'mail' or 'sendmail'
+# Can be 'smtp' or 'sendmail'
 MAIL_DRIVER=smtp
 
 # Mail sending options
@@ -195,10 +195,12 @@ 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
 
@@ -221,6 +223,7 @@ 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/
@@ -245,10 +248,15 @@ AVATAR_URL=
 DRAWIO=true
 
 # Default item listing view
-# Used for public visitors and user's without a preference
-# Can be 'list' or 'grid'
+# 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.

.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.

.github/translators.txt

@@ -49,6 +49,12 @@ Name :: Languages
 @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
@@ -134,3 +140,30 @@ 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

.github/workflows/phpunit.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - master
       - release
+      - gh_actions_update
   pull_request:
     branches:
       - '*'
@@ -13,13 +14,19 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: [7.2, 7.4]
+        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: |
@@ -38,7 +45,7 @@ jobs:
     - 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 BY '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;'
 

.github/workflows/test-migrations.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - master
       - release
+      - gh_actions_update
   pull_request:
     branches:
       - '*'
@@ -13,13 +14,19 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: [7.2, 7.4]
+        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: |
@@ -38,7 +45,7 @@ jobs:
       - 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 BY '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;'
 

app/Actions/Activity.php

@@ -6,6 +6,7 @@ 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;
 
 /**
@@ -23,7 +24,7 @@ class Activity extends Model
     /**
      * Get the entity for this activity.
      */
-    public function entity()
+    public function entity(): MorphTo
     {
         if ($this->entity_type === '') {
             $this->entity_type = null;

app/Actions/ActivityService.php

@@ -78,7 +78,7 @@ class ActivityService
     public function latest(int $count = 20, int $page = 0): array
     {
         $activityList = $this->permissionService
-            ->filterRestrictedEntityRelations($this->activity, 'activities', 'entity_id', 'entity_type')
+            ->filterRestrictedEntityRelations($this->activity->newQuery(), 'activities', 'entity_id', 'entity_type')
             ->orderBy('created_at', 'desc')
             ->with(['user', 'entity'])
             ->skip($count * $page)
@@ -131,7 +131,7 @@ class ActivityService
     public function userActivity(User $user, int $count = 20, int $page = 0): array
     {
         $activityList = $this->permissionService
-            ->filterRestrictedEntityRelations($this->activity, 'activities', 'entity_id', 'entity_type')
+            ->filterRestrictedEntityRelations($this->activity->newQuery(), 'activities', 'entity_id', 'entity_type')
             ->orderBy('created_at', 'desc')
             ->where('user_id', '=', $user->id)
             ->skip($count * $page)

app/Actions/ActivityType.php

@@ -48,4 +48,4 @@ class ActivityType
     const AUTH_PASSWORD_RESET_UPDATE = 'auth_password_reset_update';
     const AUTH_LOGIN = 'auth_login';
     const AUTH_REGISTER = 'auth_register';
-}
+}

app/Actions/Favourite.php

@@ -0,0 +1,17 @@
+<?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();
+    }
+}

app/Actions/Tag.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Actions;
 
 use BookStack\Model;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
 
 class Tag extends Model
 {
@@ -9,10 +10,25 @@ class Tag extends Model
 
     /**
      * Get the entity that this tag belongs to
-     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
      */
-    public function entity()
+    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');
+    }
 }

app/Actions/TagRepo.php

@@ -26,7 +26,9 @@ class TagRepo
      */
     public function getNameSuggestions(?string $searchTerm): Collection
     {
-        $query = $this->tag->select('*', DB::raw('count(*) as count'))->groupBy('name');
+        $query = $this->tag->newQuery()
+            ->select('*', DB::raw('count(*) as count'))
+            ->groupBy('name');
 
         if ($searchTerm) {
             $query = $query->where('name', 'LIKE', $searchTerm . '%')->orderBy('name', 'desc');
@@ -45,7 +47,9 @@ class TagRepo
      */
     public function getValueSuggestions(?string $searchTerm, ?string $tagName): Collection
     {
-        $query = $this->tag->select('*', DB::raw('count(*) as count'))->groupBy('value');
+        $query = $this->tag->newQuery()
+            ->select('*', DB::raw('count(*) as count'))
+            ->groupBy('value');
 
         if ($searchTerm) {
             $query = $query->where('value', 'LIKE', $searchTerm . '%')->orderBy('value', 'desc');

app/Actions/View.php

@@ -1,7 +1,19 @@
 <?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
 {
 
@@ -9,10 +21,37 @@ class View extends Model
 
     /**
      * Get all owning viewable models.
-     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
      */
-    public function viewable()
+    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();
+    }
 }

app/Actions/ViewService.php

@@ -1,116 +0,0 @@
-<?php namespace BookStack\Actions;
-
-use BookStack\Auth\Permissions\PermissionService;
-use BookStack\Entities\Models\Book;
-use BookStack\Entities\Models\Entity;
-use BookStack\Entities\EntityProvider;
-use DB;
-use Illuminate\Support\Collection;
-
-class ViewService
-{
-    protected $view;
-    protected $permissionService;
-    protected $entityProvider;
-
-    /**
-     * ViewService constructor.
-     * @param View $view
-     * @param PermissionService $permissionService
-     * @param EntityProvider $entityProvider
-     */
-    public function __construct(View $view, PermissionService $permissionService, EntityProvider $entityProvider)
-    {
-        $this->view = $view;
-        $this->permissionService = $permissionService;
-        $this->entityProvider = $entityProvider;
-    }
-
-    /**
-     * Add a view to the given entity.
-     * @param \BookStack\Entities\Models\Entity $entity
-     * @return int
-     */
-    public function add(Entity $entity)
-    {
-        $user = user();
-        if ($user === null || $user->isDefault()) {
-            return 0;
-        }
-        $view = $entity->views()->where('user_id', '=', $user->id)->first();
-        // Add view if model exists
-        if ($view) {
-            $view->increment('views');
-            return $view->views;
-        }
-
-        // Otherwise create new view count
-        $entity->views()->save($this->view->newInstance([
-            'user_id' => $user->id,
-            'views' => 1
-        ]));
-
-        return 1;
-    }
-
-    /**
-     * Get the entities with the most views.
-     * @param int $count
-     * @param int $page
-     * @param string|array $filterModels
-     * @param string $action - used for permission checking
-     * @return Collection
-     */
-    public function getPopular(int $count = 10, int $page = 0, array $filterModels = null, string $action = 'view')
-    {
-        $skipCount = $count * $page;
-        $query = $this->permissionService
-            ->filterRestrictedEntityRelations($this->view, 'views', 'viewable_id', 'viewable_type', $action)
-            ->select('*', 'viewable_id', 'viewable_type', DB::raw('SUM(views) as view_count'))
-            ->groupBy('viewable_id', 'viewable_type')
-            ->orderBy('view_count', 'desc');
-
-        if ($filterModels) {
-            $query->whereIn('viewable_type', $this->entityProvider->getMorphClasses($filterModels));
-        }
-
-        return $query->with('viewable')
-            ->skip($skipCount)
-            ->take($count)
-            ->get()
-            ->pluck('viewable')
-            ->filter();
-    }
-
-    /**
-     * Get all recently viewed entities for the current user.
-     */
-    public function getUserRecentlyViewed(int $count = 10, int $page = 1)
-    {
-        $user = user();
-        if ($user === null || $user->isDefault()) {
-            return collect();
-        }
-
-        $all = collect();
-        /** @var Entity $instance */
-        foreach ($this->entityProvider->all() as $name => $instance) {
-            $items = $instance::visible()->withLastView()
-                ->orderBy('last_viewed_at', 'desc')
-                ->skip($count * ($page - 1))
-                ->take($count)
-                ->get();
-            $all = $all->concat($items);
-        }
-
-        return $all->sortByDesc('last_viewed_at')->slice(0, $count);
-    }
-
-    /**
-     * Reset all view counts by deleting all views.
-     */
-    public function resetAll()
-    {
-        $this->view->truncate();
-    }
-}

app/Api/ApiDocsGenerator.php

@@ -142,5 +142,4 @@ class ApiDocsGenerator
             ];
         });
     }
-
-}
+}

app/Api/ApiTokenGuard.php

@@ -163,4 +163,4 @@ class ApiTokenGuard implements Guard
     {
         $this->user = null;
     }
-}
+}

app/Auth/Access/Guards/ExternalBaseSessionGuard.php

@@ -299,5 +299,4 @@ class ExternalBaseSessionGuard implements StatefulGuard
 
         return $this;
     }
-
 }

app/Auth/Access/Guards/LdapSessionGuard.php

@@ -5,14 +5,12 @@ namespace BookStack\Auth\Access\Guards;
 use BookStack\Auth\Access\LdapService;
 use BookStack\Auth\Access\RegistrationService;
 use BookStack\Auth\User;
-use BookStack\Auth\UserRepo;
 use BookStack\Exceptions\LdapException;
 use BookStack\Exceptions\LoginAttemptException;
 use BookStack\Exceptions\LoginAttemptEmailNeededException;
 use BookStack\Exceptions\UserRegistrationException;
 use Illuminate\Contracts\Auth\UserProvider;
 use Illuminate\Contracts\Session\Session;
-use Illuminate\Support\Facades\Hash;
 use Illuminate\Support\Str;
 
 class LdapSessionGuard extends ExternalBaseSessionGuard
@@ -23,13 +21,13 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
     /**
      * LdapSessionGuard constructor.
      */
-    public function __construct($name,
+    public function __construct(
+        $name,
         UserProvider $provider,
         Session $session,
         LdapService $ldapService,
         RegistrationService $registrationService
-    )
-    {
+    ) {
         $this->ldapService = $ldapService;
         parent::__construct($name, $provider, $session, $registrationService);
     }
@@ -92,6 +90,11 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
             $this->ldapService->syncGroups($user, $username);
         }
 
+        // Attach avatar if non-existent
+        if (is_null($user->avatar)) {
+            $this->ldapService->saveAndAttachAvatar($user, $userDetails);
+        }
+
         $this->login($user, $remember);
         return true;
     }
@@ -117,7 +120,8 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
             'password' => Str::random(32),
         ];
 
-        return $this->registrationService->registerUser($details, null, false);
+        $user = $this->registrationService->registerUser($details, null, false);
+        $this->ldapService->saveAndAttachAvatar($user, $ldapUserDetails);
+        return $user;
     }
-
 }

app/Auth/Access/Guards/Saml2SessionGuard.php

@@ -34,5 +34,4 @@ class Saml2SessionGuard extends ExternalBaseSessionGuard
     {
         return false;
     }
-
 }

app/Auth/Access/Ldap.php

@@ -31,6 +31,14 @@ 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

app/Auth/Access/LdapService.php

@@ -3,7 +3,9 @@
 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
@@ -14,15 +16,17 @@ class LdapService extends ExternalAuthService
 
     protected $ldap;
     protected $ldapConnection;
+    protected $userAvatars;
     protected $config;
     protected $enabled;
 
     /**
      * LdapService constructor.
      */
-    public function __construct(Ldap $ldap)
+    public function __construct(Ldap $ldap, UserAvatars $userAvatars)
     {
         $this->ldap = $ldap;
+        $this->userAvatars = $userAvatars;
         $this->config = config('services.ldap');
         $this->enabled = config('auth.method') === 'ldap';
     }
@@ -76,19 +80,23 @@ class LdapService extends ExternalAuthService
         $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, ['cn', 'dn', $idAttr, $emailAttr, $displayNameAttr]);
+        $user = $this->getUserWithAttributes($userName, array_filter([
+            'cn', 'dn', $idAttr, $emailAttr, $displayNameAttr, $thumbnailAttr,
+        ]));
 
-        if ($user === null) {
+        if (is_null($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'],
+            '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']) {
@@ -187,8 +195,8 @@ class LdapService extends ExternalAuthService
             throw new LdapException(trans('errors.ldap_extension_not_installed'));
         }
 
-         // Check if TLS_INSECURE is set. The handle is set to NULL due to the nature of
-         // the LDAP_OPT_X_TLS_REQUIRE_CERT option. It can only be set globally and not per handle.
+        // 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);
         }
@@ -205,6 +213,14 @@ class LdapService extends ExternalAuthService
             $this->ldap->setVersion($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;
     }
@@ -342,4 +358,22 @@ class LdapService extends ExternalAuthService
         $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}");
+        }
+    }
 }

app/Auth/Access/RegistrationService.php

@@ -6,6 +6,8 @@ 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
@@ -71,6 +73,7 @@ class RegistrationService
         }
 
         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) {
@@ -83,7 +86,6 @@ class RegistrationService
                 $message = trans('auth.email_confirm_send_error');
                 throw new UserRegistrationException($message, '/register/confirm');
             }
-
         }
 
         return $newUser;
@@ -109,5 +111,4 @@ class RegistrationService
             throw new UserRegistrationException(trans('auth.registration_email_domain_invalid'), $redirect);
         }
     }
-
-}
+}

app/Auth/Access/Saml2Service.php

@@ -6,6 +6,8 @@ use BookStack\Exceptions\JsonDebugException;
 use BookStack\Exceptions\SamlException;
 use BookStack\Exceptions\UserRegistrationException;
 use BookStack\Facades\Activity;
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
 use Exception;
 use Illuminate\Support\Str;
 use OneLogin\Saml2\Auth;
@@ -375,6 +377,7 @@ class Saml2Service extends ExternalAuthService
 
         auth()->login($user);
         Activity::add(ActivityType::AUTH_LOGIN, "saml2; {$user->logDescriptor()}");
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, 'saml2', $user);
         return $user;
     }
 }

app/Auth/Access/SocialAuthService.php

@@ -2,37 +2,63 @@
 
 use BookStack\Actions\ActivityType;
 use BookStack\Auth\SocialAccount;
-use BookStack\Auth\UserRepo;
+use BookStack\Auth\User;
 use BookStack\Exceptions\SocialDriverNotConfigured;
 use BookStack\Exceptions\SocialSignInAccountNotUsed;
 use BookStack\Exceptions\UserRegistrationException;
 use BookStack\Facades\Activity;
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
+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
 {
-
-    protected $userRepo;
+    /**
+     * The core socialite library used.
+     * @var Socialite
+     */
     protected $socialite;
-    protected $socialAccount;
 
-    protected $validSocialDrivers = ['google', 'github', 'facebook', 'slack', 'twitter', 'azure', 'okta', 'gitlab', 'twitch', 'discord'];
+    /**
+     * 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(UserRepo $userRepo, Socialite $socialite, SocialAccount $socialAccount)
+    public function __construct(Socialite $socialite)
     {
-        $this->userRepo = $userRepo;
         $this->socialite = $socialite;
-        $this->socialAccount = $socialAccount;
     }
 
-
     /**
      * Start the social login path.
      * @throws SocialDriverNotConfigured
@@ -40,7 +66,7 @@ class SocialAuthService
     public function startLogIn(string $socialDriver): RedirectResponse
     {
         $driver = $this->validateDriver($socialDriver);
-        return $this->getSocialDriver($driver)->redirect();
+        return $this->getDriverForRedirect($driver)->redirect();
     }
 
     /**
@@ -50,7 +76,7 @@ class SocialAuthService
     public function startRegister(string $socialDriver): RedirectResponse
     {
         $driver = $this->validateDriver($socialDriver);
-        return $this->getSocialDriver($driver)->redirect();
+        return $this->getDriverForRedirect($driver)->redirect();
     }
 
     /**
@@ -60,11 +86,11 @@ class SocialAuthService
     public function handleRegistrationCallback(string $socialDriver, SocialUser $socialUser): SocialUser
     {
         // Check social account has not already been used
-        if ($this->socialAccount->where('driver_id', '=', $socialUser->getId())->exists()) {
-            throw new UserRegistrationException(trans('errors.social_account_in_use', ['socialAccount'=>$socialDriver]), '/login');
+        if (SocialAccount::query()->where('driver_id', '=', $socialUser->getId())->exists()) {
+            throw new UserRegistrationException(trans('errors.social_account_in_use', ['socialAccount' => $socialDriver]), '/login');
         }
 
-        if ($this->userRepo->getByEmail($socialUser->getEmail())) {
+        if (User::query()->where('email', '=', $socialUser->getEmail())->exists()) {
             $email = $socialUser->getEmail();
             throw new UserRegistrationException(trans('errors.error_user_exists_different_creds', ['email' => $email]), '/login');
         }
@@ -91,7 +117,7 @@ class SocialAuthService
         $socialId = $socialUser->getId();
 
         // Get any attached social accounts or users
-        $socialAccount = $this->socialAccount->where('driver_id', '=', $socialId)->first();
+        $socialAccount = SocialAccount::query()->where('driver_id', '=', $socialId)->first();
         $isLoggedIn = auth()->check();
         $currentUser = user();
         $titleCaseDriver = Str::title($socialDriver);
@@ -101,14 +127,15 @@ class SocialAuthService
         if (!$isLoggedIn && $socialAccount !== null) {
             auth()->login($socialAccount->user);
             Activity::add(ActivityType::AUTH_LOGIN, $socialAccount);
+            Theme::dispatch(ThemeEvents::AUTH_LOGIN, $socialDriver, $socialAccount->user);
             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) {
-            $this->fillSocialAccount($socialDriver, $socialUser);
-            $currentUser->socialAccounts()->save($this->socialAccount);
+            $account = $this->newSocialAccount($socialDriver, $socialUser);
+            $currentUser->socialAccounts()->save($account);
             session()->flash('success', trans('settings.users_social_connected', ['socialAccount' => $titleCaseDriver]));
             return redirect($currentUser->getEditUrl());
         }
@@ -130,7 +157,7 @@ class SocialAuthService
         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');
     }
 
@@ -207,21 +234,19 @@ class SocialAuthService
     /**
      * Fill and return a SocialAccount from the given driver name and SocialUser.
      */
-    public function fillSocialAccount(string $socialDriver, SocialUser $socialUser): SocialAccount
+    public function newSocialAccount(string $socialDriver, SocialUser $socialUser): SocialAccount
     {
-        $this->socialAccount->fill([
-            'driver'    => $socialDriver,
+        return new SocialAccount([
+            'driver' => $socialDriver,
             'driver_id' => $socialUser->getId(),
-            'avatar'    => $socialUser->getAvatar()
+            'avatar' => $socialUser->getAvatar()
         ]);
-        return $this->socialAccount;
     }
 
     /**
      * Detach a social account from a user.
-     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
      */
-    public function detachSocialAccount(string $socialDriver)
+    public function detachSocialAccount(string $socialDriver): void
     {
         user()->socialAccounts()->where('driver', '=', $socialDriver)->delete();
     }
@@ -229,7 +254,7 @@ class SocialAuthService
     /**
      * Provide redirect options per service for the Laravel Socialite driver
      */
-    public function getSocialDriver(string $driverName): Provider
+    protected function getDriverForRedirect(string $driverName): Provider
     {
         $driver = $this->socialite->driver($driverName);
 
@@ -240,6 +265,33 @@ class SocialAuthService
             $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;
+        }
+    }
 }

app/Auth/Permissions/PermissionService.php

@@ -1,25 +1,33 @@
 <?php namespace BookStack\Auth\Permissions;
 
-use 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\EntityProvider;
+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 Illuminate\Support\Collection;
+use Throwable;
 
 class PermissionService
 {
+    /**
+     * @var ?array
+     */
+    protected $userRoles = null;
 
-    protected $currentAction;
-    protected $isAdminUser;
-    protected $userRoles = false;
-    protected $currentUserModel = false;
+    /**
+     * @var ?User
+     */
+    protected $currentUserModel = null;
 
     /**
      * @var Connection
@@ -27,47 +35,20 @@ class PermissionService
     protected $db;
 
     /**
-     * @var JointPermission
+     * @var array
      */
-    protected $jointPermission;
-
-    /**
-     * @var Role
-     */
-    protected $role;
-
-    /**
-     * @var EntityPermission
-     */
-    protected $entityPermission;
-
-    /**
-     * @var EntityProvider
-     */
-    protected $entityProvider;
-
     protected $entityCache;
 
     /**
      * PermissionService constructor.
      */
-    public function __construct(
-        JointPermission $jointPermission,
-        Permissions\EntityPermission $entityPermission,
-        Role $role,
-        Connection $db,
-        EntityProvider $entityProvider
-    ) {
+    public function __construct(Connection $db)
+    {
         $this->db = $db;
-        $this->jointPermission = $jointPermission;
-        $this->entityPermission = $entityPermission;
-        $this->role = $role;
-        $this->entityProvider = $entityProvider;
     }
 
     /**
      * Set the database connection
-     * @param Connection $connection
      */
     public function setConnection(Connection $connection)
     {
@@ -76,81 +57,63 @@ class PermissionService
 
     /**
      * Prepare the local entity cache and ensure it's empty
-     * @param \BookStack\Entities\Models\Entity[] $entities
+     * @param Entity[] $entities
      */
-    protected function readyEntityCache($entities = [])
+    protected function readyEntityCache(array $entities = [])
     {
         $this->entityCache = [];
 
         foreach ($entities as $entity) {
-            $type = $entity->getType();
-            if (!isset($this->entityCache[$type])) {
-                $this->entityCache[$type] = collect();
+            $class = get_class($entity);
+            if (!isset($this->entityCache[$class])) {
+                $this->entityCache[$class] = collect();
             }
-            $this->entityCache[$type]->put($entity->id, $entity);
+            $this->entityCache[$class]->put($entity->id, $entity);
         }
     }
 
     /**
      * Get a book via ID, Checks local cache
-     * @param $bookId
-     * @return Book
      */
-    protected function getBook($bookId)
+    protected function getBook(int $bookId): ?Book
     {
-        if (isset($this->entityCache['book']) && $this->entityCache['book']->has($bookId)) {
-            return $this->entityCache['book']->get($bookId);
+        if (isset($this->entityCache[Book::class]) && $this->entityCache[Book::class]->has($bookId)) {
+            return $this->entityCache[Book::class]->get($bookId);
         }
 
-        $book = $this->entityProvider->book->find($bookId);
-        if ($book === null) {
-            $book = false;
-        }
-
-        return $book;
+        return Book::query()->withTrashed()->find($bookId);
     }
 
     /**
      * Get a chapter via ID, Checks local cache
-     * @param $chapterId
-     * @return \BookStack\Entities\Models\Book
      */
-    protected function getChapter($chapterId)
+    protected function getChapter(int $chapterId): ?Chapter
     {
-        if (isset($this->entityCache['chapter']) && $this->entityCache['chapter']->has($chapterId)) {
-            return $this->entityCache['chapter']->get($chapterId);
+        if (isset($this->entityCache[Chapter::class]) && $this->entityCache[Chapter::class]->has($chapterId)) {
+            return $this->entityCache[Chapter::class]->get($chapterId);
         }
 
-        $chapter = $this->entityProvider->chapter->find($chapterId);
-        if ($chapter === null) {
-            $chapter = false;
-        }
-
-        return $chapter;
+        return Chapter::query()
+            ->withTrashed()
+            ->find($chapterId);
     }
 
     /**
-     * Get the roles for the current user;
-     * @return array|bool
+     * Get the roles for the current logged in user.
      */
-    protected function getRoles()
+    protected function getCurrentUserRoles(): array
     {
-        if ($this->userRoles !== false) {
+        if (!is_null($this->userRoles)) {
             return $this->userRoles;
         }
 
-        $roles = [];
-
         if (auth()->guest()) {
-            $roles[] = $this->role->getSystemRole('public')->id;
-            return $roles;
+            $this->userRoles = [Role::getSystemRole('public')->id];
+        } else {
+            $this->userRoles = $this->currentUser()->roles->pluck('id')->values()->all();
         }
 
-
-        foreach ($this->currentUser()->roles as $role) {
-            $roles[] = $role->id;
-        }
-        return $roles;
+        return $this->userRoles;
     }
 
     /**
@@ -158,59 +121,57 @@ class PermissionService
      */
     public function buildJointPermissions()
     {
-        $this->jointPermission->truncate();
+        JointPermission::query()->truncate();
         $this->readyEntityCache();
 
         // Get all roles (Should be the most limited dimension)
-        $roles = $this->role->with('permissions')->get()->all();
+        $roles = Role::query()->with('permissions')->get()->all();
 
         // Chunk through all books
-        $this->bookFetchQuery()->chunk(5, function ($books) use ($roles) {
+        $this->bookFetchQuery()->chunk(5, function (EloquentCollection $books) use ($roles) {
             $this->buildJointPermissionsForBooks($books, $roles);
         });
 
         // Chunk through all bookshelves
-        $this->entityProvider->bookshelf->newQuery()->withTrashed()->select(['id', 'restricted', 'owned_by'])
-            ->chunk(50, function ($shelves) use ($roles) {
+        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.
-     * @return QueryBuilder
      */
-    protected function bookFetchQuery()
+    protected function bookFetchQuery(): Builder
     {
-        return $this->entityProvider->book->withTrashed()->newQuery()
-            ->select(['id', 'restricted', 'owned_by'])->with(['chapters' => function ($query) {
-                $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id']);
-            }, 'pages'  => function ($query) {
-                $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id', 'chapter_id']);
-            }]);
+        return Book::query()->withTrashed()
+            ->select(['id', 'restricted', 'owned_by'])->with([
+                'chapters' => function ($query) {
+                    $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id']);
+                },
+                'pages' => function ($query) {
+                    $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id', 'chapter_id']);
+                }
+            ]);
     }
 
     /**
-     * @param Collection $shelves
-     * @param array $roles
-     * @param bool $deleteOld
-     * @throws \Throwable
+     * Build joint permissions for the given shelf and role combinations.
+     * @throws Throwable
      */
-    protected function buildJointPermissionsForShelves($shelves, $roles, $deleteOld = false)
+    protected function buildJointPermissionsForShelves(EloquentCollection $shelves, array $roles, bool $deleteOld = false)
     {
         if ($deleteOld) {
             $this->deleteManyJointPermissionsForEntities($shelves->all());
         }
-        $this->createManyJointPermissions($shelves, $roles);
+        $this->createManyJointPermissions($shelves->all(), $roles);
     }
 
     /**
-     * Build joint permissions for an array of books
-     * @param Collection $books
-     * @param array $roles
-     * @param bool $deleteOld
+     * Build joint permissions for the given book and role combinations.
+     * @throws Throwable
      */
-    protected function buildJointPermissionsForBooks($books, $roles, $deleteOld = false)
+    protected function buildJointPermissionsForBooks(EloquentCollection $books, array $roles, bool $deleteOld = false)
     {
         $entities = clone $books;
 
@@ -227,55 +188,53 @@ class PermissionService
         if ($deleteOld) {
             $this->deleteManyJointPermissionsForEntities($entities->all());
         }
-        $this->createManyJointPermissions($entities, $roles);
+        $this->createManyJointPermissions($entities->all(), $roles);
     }
 
     /**
      * Rebuild the entity jointPermissions for a particular entity.
-     * @param \BookStack\Entities\Models\Entity $entity
-     * @throws \Throwable
+     * @throws Throwable
      */
     public function buildJointPermissionsForEntity(Entity $entity)
     {
         $entities = [$entity];
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             $books = $this->bookFetchQuery()->where('id', '=', $entity->id)->get();
-            $this->buildJointPermissionsForBooks($books, $this->role->newQuery()->get(), true);
+            $this->buildJointPermissionsForBooks($books, Role::query()->get()->all(), true);
             return;
         }
 
+        /** @var BookChild $entity */
         if ($entity->book) {
             $entities[] = $entity->book;
         }
 
-        if ($entity->isA('page') && $entity->chapter_id) {
+        if ($entity instanceof Page && $entity->chapter_id) {
             $entities[] = $entity->chapter;
         }
 
-        if ($entity->isA('chapter')) {
+        if ($entity instanceof Chapter) {
             foreach ($entity->pages as $page) {
                 $entities[] = $page;
             }
         }
 
-        $this->buildJointPermissionsForEntities(collect($entities));
+        $this->buildJointPermissionsForEntities($entities);
     }
 
     /**
      * Rebuild the entity jointPermissions for a collection of entities.
-     * @param Collection $entities
-     * @throws \Throwable
+     * @throws Throwable
      */
-    public function buildJointPermissionsForEntities(Collection $entities)
+    public function buildJointPermissionsForEntities(array $entities)
     {
-        $roles = $this->role->newQuery()->get();
-        $this->deleteManyJointPermissionsForEntities($entities->all());
+        $roles = Role::query()->get()->values()->all();
+        $this->deleteManyJointPermissionsForEntities($entities);
         $this->createManyJointPermissions($entities, $roles);
     }
 
     /**
      * Build the entity jointPermissions for a particular role.
-     * @param Role $role
      */
     public function buildJointPermissionForRole(Role $role)
     {
@@ -288,7 +247,7 @@ class PermissionService
         });
 
         // Chunk through all bookshelves
-        $this->entityProvider->bookshelf->newQuery()->select(['id', 'restricted', 'owned_by'])
+        Bookshelf::query()->select(['id', 'restricted', 'owned_by'])
             ->chunk(50, function ($shelves) use ($roles) {
                 $this->buildJointPermissionsForShelves($shelves, $roles);
             });
@@ -296,7 +255,6 @@ class PermissionService
 
     /**
      * Delete the entity jointPermissions attached to a particular role.
-     * @param Role $role
      */
     public function deleteJointPermissionsForRole(Role $role)
     {
@@ -312,13 +270,13 @@ class PermissionService
         $roleIds = array_map(function ($role) {
             return $role->id;
         }, $roles);
-        $this->jointPermission->newQuery()->whereIn('role_id', $roleIds)->delete();
+        JointPermission::query()->whereIn('role_id', $roleIds)->delete();
     }
 
     /**
      * Delete the entity jointPermissions for a particular entity.
      * @param Entity $entity
-     * @throws \Throwable
+     * @throws Throwable
      */
     public function deleteJointPermissionsForEntity(Entity $entity)
     {
@@ -327,10 +285,10 @@ class PermissionService
 
     /**
      * Delete all of the entity jointPermissions for a list of entities.
-     * @param \BookStack\Entities\Models\Entity[] $entities
-     * @throws \Throwable
+     * @param Entity[] $entities
+     * @throws Throwable
      */
-    protected function deleteManyJointPermissionsForEntities($entities)
+    protected function deleteManyJointPermissionsForEntities(array $entities)
     {
         if (count($entities) === 0) {
             return;
@@ -352,19 +310,19 @@ class PermissionService
     }
 
     /**
-     * Create & Save entity jointPermissions for many entities and jointPermissions.
-     * @param Collection $entities
-     * @param array $roles
-     * @throws \Throwable
+     * Create & Save entity jointPermissions for many entities and roles.
+     * @param Entity[] $entities
+     * @param Role[] $roles
+     * @throws Throwable
      */
-    protected function createManyJointPermissions($entities, $roles)
+    protected function createManyJointPermissions(array $entities, array $roles)
     {
         $this->readyEntityCache($entities);
         $jointPermissions = [];
 
         // Fetch Entity Permissions and create a mapping of entity restricted statuses
         $entityRestrictedMap = [];
-        $permissionFetch = $this->entityPermission->newQuery();
+        $permissionFetch = EntityPermission::query();
         foreach ($entities as $entity) {
             $entityRestrictedMap[$entity->getMorphClass() . ':' . $entity->id] = boolval($entity->getRawAttribute('restricted'));
             $permissionFetch->orWhere(function ($query) use ($entity) {
@@ -408,16 +366,14 @@ class PermissionService
 
     /**
      * Get the actions related to an entity.
-     * @param \BookStack\Entities\Models\Entity $entity
-     * @return array
      */
-    protected function getActions(Entity $entity)
+    protected function getActions(Entity $entity): array
     {
         $baseActions = ['view', 'update', 'delete'];
-        if ($entity->isA('chapter') || $entity->isA('book')) {
+        if ($entity instanceof Chapter || $entity instanceof Book) {
             $baseActions[] = 'page-create';
         }
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             $baseActions[] = 'chapter-create';
         }
         return $baseActions;
@@ -426,14 +382,8 @@ class PermissionService
     /**
      * Create entity permission data for an entity and role
      * for a particular action.
-     * @param Entity $entity
-     * @param Role $role
-     * @param string $action
-     * @param array $permissionMap
-     * @param array $rolePermissionMap
-     * @return array
      */
-    protected function createJointPermissionData(Entity $entity, Role $role, $action, $permissionMap, $rolePermissionMap)
+    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']);
@@ -450,7 +400,7 @@ class PermissionService
             return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
         }
 
-        if ($entity->isA('book') || $entity->isA('bookshelf')) {
+        if ($entity instanceof Book || $entity instanceof Bookshelf) {
             return $this->createJointPermissionDataArray($entity, $role, $action, $roleHasPermission, $roleHasPermissionOwn);
         }
 
@@ -460,7 +410,7 @@ class PermissionService
         $hasPermissiveAccessToParents = !$book->restricted;
 
         // For pages with a chapter, Check if explicit permissions are set on the Chapter
-        if ($entity->isA('page') && $entity->chapter_id !== 0 && $entity->chapter_id !== '0') {
+        if ($entity instanceof Page && intval($entity->chapter_id) !== 0) {
             $chapter = $this->getChapter($entity->chapter_id);
             $hasPermissiveAccessToParents = $hasPermissiveAccessToParents && !$chapter->restricted;
             if ($chapter->restricted) {
@@ -479,38 +429,27 @@ class PermissionService
 
     /**
      * Check for an active restriction in an entity map.
-     * @param $entityMap
-     * @param Entity $entity
-     * @param Role $role
-     * @param $action
-     * @return bool
      */
-    protected function mapHasActiveRestriction($entityMap, Entity $entity, Role $role, $action)
+    protected function mapHasActiveRestriction(array $entityMap, Entity $entity, Role $role, string $action): bool
     {
         $key = $entity->getMorphClass() . ':' . $entity->getRawAttribute('id') . ':' . $role->getRawAttribute('id') . ':' . $action;
-        return isset($entityMap[$key]) ? $entityMap[$key] : false;
+        return $entityMap[$key] ?? false;
     }
 
     /**
      * Create an array of data with the information of an entity jointPermissions.
      * Used to build data for bulk insertion.
-     * @param \BookStack\Entities\Models\Entity $entity
-     * @param Role $role
-     * @param $action
-     * @param $permissionAll
-     * @param $permissionOwn
-     * @return array
      */
-    protected function createJointPermissionDataArray(Entity $entity, Role $role, $action, $permissionAll, $permissionOwn)
+    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,
+            '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')
+            'owned_by' => $entity->getRawAttribute('owned_by'),
         ];
     }
 
@@ -524,55 +463,47 @@ class PermissionService
 
         $baseQuery = $ownable->newQuery()->where('id', '=', $ownable->id);
         $action = end($explodedPermission);
-        $this->currentAction = $action;
+        $user = $this->currentUser();
 
         $nonJointPermissions = ['restrictions', 'image', 'attachment', 'comment'];
 
         // Handle non entity specific jointPermissions
         if (in_array($explodedPermission[0], $nonJointPermissions)) {
-            $allPermission = $this->currentUser() && $this->currentUser()->can($permission . '-all');
-            $ownPermission = $this->currentUser() && $this->currentUser()->can($permission . '-own');
-            $this->currentAction = 'view';
+            $allPermission = $user && $user->can($permission . '-all');
+            $ownPermission = $user && $user->can($permission . '-own');
             $ownerField = ($ownable instanceof Entity) ? 'owned_by' : 'created_by';
-            $isOwner = $this->currentUser() && $this->currentUser()->id === $ownable->$ownerField;
+            $isOwner = $user && $user->id === $ownable->$ownerField;
             return ($allPermission || ($isOwner && $ownPermission));
         }
 
         // Handle abnormal create jointPermissions
         if ($action === 'create') {
-            $this->currentAction = $permission;
+            $action = $permission;
         }
 
-        $q = $this->entityRestrictionQuery($baseQuery)->count() > 0;
+        $hasAccess = $this->entityRestrictionQuery($baseQuery, $action)->count() > 0;
         $this->clean();
-        return $q;
+        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.
-     * @param string $permission
-     * @param string $entityClass
-     * @return bool
      */
-    public function checkUserHasPermissionOnAnything(string $permission, string $entityClass = null)
+    public function checkUserHasPermissionOnAnything(string $permission, ?string $entityClass = null): bool
     {
         $userRoleIds = $this->currentUser()->roles()->select('id')->pluck('id')->toArray();
         $userId = $this->currentUser()->id;
 
-        $permissionQuery = $this->db->table('joint_permissions')
+        $permissionQuery = JointPermission::query()
             ->where('action', '=', $permission)
             ->whereIn('role_id', $userRoleIds)
-            ->where(function ($query) use ($userId) {
-                $query->where('has_permission', '=', 1)
-                    ->orWhere(function ($query2) use ($userId) {
-                        $query2->where('has_permission_own', '=', 1)
-                            ->where('owned_by', '=', $userId);
-                    });
+            ->where(function (Builder $query) use ($userId) {
+                $this->addJointHasPermissionCheck($query, $userId);
             });
 
         if (!is_null($entityClass)) {
-            $entityInstance = app()->make($entityClass);
+            $entityInstance = app($entityClass);
             $permissionQuery = $permissionQuery->where('entity_type', '=', $entityInstance->getMorphClass());
         }
 
@@ -581,46 +512,22 @@ class PermissionService
         return $hasPermission;
     }
 
-    /**
-     * Check if an entity has restrictions set on itself or its
-     * parent tree.
-     * @param \BookStack\Entities\Models\Entity $entity
-     * @param $action
-     * @return bool|mixed
-     */
-    public function checkIfRestrictionsSet(Entity $entity, $action)
-    {
-        $this->currentAction = $action;
-        if ($entity->isA('page')) {
-            return $entity->restricted || ($entity->chapter && $entity->chapter->restricted) || $entity->book->restricted;
-        } elseif ($entity->isA('chapter')) {
-            return $entity->restricted || $entity->book->restricted;
-        } elseif ($entity->isA('book')) {
-            return $entity->restricted;
-        }
-    }
-
     /**
      * The general query filter to remove all entities
      * that the current user does not have access to.
-     * @param $query
-     * @return mixed
      */
-    protected function entityRestrictionQuery($query)
+    protected function entityRestrictionQuery(Builder $query, string $action): Builder
     {
-        $q = $query->where(function ($parentQuery) {
-            $parentQuery->whereHas('jointPermissions', function ($permissionQuery) {
-                $permissionQuery->whereIn('role_id', $this->getRoles())
-                    ->where('action', '=', $this->currentAction)
-                    ->where(function ($query) {
-                        $query->where('has_permission', '=', true)
-                            ->orWhere(function ($query) {
-                                $query->where('has_permission_own', '=', true)
-                                    ->where('owned_by', '=', $this->currentUser()->id);
-                            });
+        $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;
     }
@@ -634,14 +541,10 @@ class PermissionService
         $this->clean();
         return $query->where(function (Builder $parentQuery) use ($ability) {
             $parentQuery->whereHas('jointPermissions', function (Builder $permissionQuery) use ($ability) {
-                $permissionQuery->whereIn('role_id', $this->getRoles())
+                $permissionQuery->whereIn('role_id', $this->getCurrentUserRoles())
                     ->where('action', '=', $ability)
                     ->where(function (Builder $query) {
-                        $query->where('has_permission', '=', true)
-                            ->orWhere(function (Builder $query) {
-                                $query->where('has_permission_own', '=', true)
-                                    ->where('owned_by', '=', $this->currentUser()->id);
-                            });
+                        $this->addJointHasPermissionCheck($query, $this->currentUser()->id);
                     });
             });
         });
@@ -651,7 +554,7 @@ class PermissionService
      * Extend the given page query to ensure draft items are not visible
      * unless created by the given user.
      */
-    public function enforceDraftVisiblityOnQuery(Builder $query): Builder
+    public function enforceDraftVisibilityOnQuery(Builder $query): Builder
     {
         return $query->where(function (Builder $query) {
             $query->where('draft', '=', false)
@@ -663,109 +566,90 @@ class PermissionService
     }
 
     /**
-     * Add restrictions for a generic entity
-     * @param string $entityType
-     * @param Builder|\BookStack\Entities\Models\Entity $query
-     * @param string $action
-     * @return Builder
+     * Add restrictions for a generic entity.
      */
-    public function enforceEntityRestrictions($entityType, $query, $action = 'view')
+    public function enforceEntityRestrictions(Entity $entity, Builder $query, string $action = 'view'): Builder
     {
-        if (strtolower($entityType) === 'page') {
+        if ($entity instanceof Page) {
             // Prevent drafts being visible to others.
-            $query = $query->where(function ($query) {
-                $query->where('draft', '=', false)
-                    ->orWhere(function ($query) {
-                        $query->where('draft', '=', true)
-                            ->where('owned_by', '=', $this->currentUser()->id);
-                    });
-            });
+            $this->enforceDraftVisibilityOnQuery($query);
         }
 
-        $this->currentAction = $action;
-        return $this->entityRestrictionQuery($query);
+        return $this->entityRestrictionQuery($query, $action);
     }
 
     /**
      * Filter items that have entities set as a polymorphic relation.
-     * @param $query
-     * @param string $tableName
-     * @param string $entityIdColumn
-     * @param string $entityTypeColumn
-     * @param string $action
-     * @return QueryBuilder
+     * @param Builder|\Illuminate\Database\Query\Builder $query
      */
-    public function filterRestrictedEntityRelations($query, $tableName, $entityIdColumn, $entityTypeColumn, $action = 'view')
+    public function filterRestrictedEntityRelations($query, string $tableName, string $entityIdColumn, string $entityTypeColumn, string $action = 'view')
     {
-
-        $this->currentAction = $action;
         $tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn, 'entityTypeColumn' => $entityTypeColumn];
 
-        $q = $query->where(function ($query) use ($tableDetails) {
-            $query->whereExists(function ($permissionQuery) use (&$tableDetails) {
-                $permissionQuery->select('id')->from('joint_permissions')
+        $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', '=', $this->currentAction)
-                    ->whereIn('role_id', $this->getRoles())
-                    ->where(function ($query) {
-                        $query->where('has_permission', '=', true)->orWhere(function ($query) {
-                            $query->where('has_permission_own', '=', true)
-                                ->where('owned_by', '=', $this->currentUser()->id);
-                        });
+                    ->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 permissions are granted.
-     * @param $entityType
-     * @param $query
-     * @param $tableName
-     * @param $entityIdColumn
-     * @return mixed
+     * where view permissions are granted.
      */
-    public function filterRelatedEntity($entityType, $query, $tableName, $entityIdColumn)
+    public function filterRelatedEntity(string $entityClass, Builder $query, string $tableName, string $entityIdColumn): Builder
     {
-        $this->currentAction = 'view';
         $tableDetails = ['tableName' => $tableName, 'entityIdColumn' => $entityIdColumn];
+        $morphClass = app($entityClass)->getMorphClass();
 
-        $pageMorphClass = $this->entityProvider->get($entityType)->getMorphClass();
-
-        $q = $query->where(function ($query) use ($tableDetails, $pageMorphClass) {
-            $query->where(function ($query) use (&$tableDetails, $pageMorphClass) {
-                $query->whereExists(function ($permissionQuery) use (&$tableDetails, $pageMorphClass) {
+        $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', '=', $pageMorphClass)
-                        ->where('action', '=', $this->currentAction)
-                        ->whereIn('role_id', $this->getRoles())
-                        ->where(function ($query) {
-                            $query->where('has_permission', '=', true)->orWhere(function ($query) {
-                                $query->where('has_permission_own', '=', true)
-                                    ->where('owned_by', '=', $this->currentUser()->id);
-                            });
+                        ->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;
     }
 
     /**
-     * Get the current user
-     * @return \BookStack\Auth\User
+     * Add the query for checking the given user id has permission
+     * within the join_permissions table.
+     * @param QueryBuilder|Builder $query
      */
-    private function currentUser()
+    protected function addJointHasPermissionCheck($query, int $userIdToCheck)
     {
-        if ($this->currentUserModel === false) {
+        $query->where('has_permission', '=', true)->orWhere(function ($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();
         }
 
@@ -775,10 +659,9 @@ class PermissionService
     /**
      * Clean the cached user elements.
      */
-    private function clean()
+    private function clean(): void
     {
-        $this->currentUserModel = false;
-        $this->userRoles = false;
-        $this->isAdminUser = null;
+        $this->currentUserModel = null;
+        $this->userRoles = null;
     }
 }

app/Auth/Role.php

@@ -92,7 +92,7 @@ class Role extends Model implements Loggable
     }
 
     /**
-     * Get all visible roles
+     * Get all visible roles.
      */
     public static function visible(): Collection
     {
@@ -104,7 +104,10 @@ class Role extends Model implements Loggable
      */
     public static function restrictable(): Collection
     {
-        return static::query()->where('system_name', '!=', 'admin')->get();
+        return static::query()
+            ->where('system_name', '!=', 'admin')
+            ->orderBy('display_name', 'asc')
+            ->get();
     }
 
     /**

app/Auth/User.php

@@ -1,7 +1,10 @@
 <?php namespace BookStack\Auth;
 
+use BookStack\Actions\Favourite;
 use BookStack\Api\ApiToken;
+use BookStack\Entities\Tools\SlugGenerator;
 use BookStack\Interfaces\Loggable;
+use BookStack\Interfaces\Sluggable;
 use BookStack\Model;
 use BookStack\Notifications\ResetPassword;
 use BookStack\Uploads\Image;
@@ -22,6 +25,7 @@ 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
@@ -30,8 +34,9 @@ use Illuminate\Support\Collection;
  * @property int $image_id
  * @property string $external_auth_id
  * @property string $system_name
+ * @property Collection $roles
  */
-class User extends Model implements AuthenticatableContract, CanResetPasswordContract, Loggable
+class User extends Model implements AuthenticatableContract, CanResetPasswordContract, Loggable, Sluggable
 {
     use Authenticatable, CanResetPassword, Notifiable;
 
@@ -72,23 +77,21 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * Returns the default public user.
-     * @return User
      */
-    public static function getDefault()
+    public static function getDefault(): User
     {
         if (!is_null(static::$defaultUser)) {
             return static::$defaultUser;
         }
         
-        static::$defaultUser = static::where('system_name', '=', 'public')->first();
+        static::$defaultUser = static::query()->where('system_name', '=', 'public')->first();
         return static::$defaultUser;
     }
 
     /**
      * Check if the user is the default public user.
-     * @return bool
      */
-    public function isDefault()
+    public function isDefault(): bool
     {
         return $this->system_name === 'public';
     }
@@ -115,12 +118,10 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * Check if the user has a role.
-     * @param $role
-     * @return mixed
      */
-    public function hasSystemRole($role)
+    public function hasSystemRole(string $roleSystemName): bool
     {
-        return $this->roles->pluck('system_name')->contains($role);
+        return $this->roles->pluck('system_name')->contains($roleSystemName);
     }
 
     /**
@@ -184,9 +185,8 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * Get the social account associated with this user.
-     * @return HasMany
      */
-    public function socialAccounts()
+    public function socialAccounts(): HasMany
     {
         return $this->hasMany(SocialAccount::class);
     }
@@ -207,11 +207,9 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     }
 
     /**
-     * Returns the user's avatar,
-     * @param int $size
-     * @return string
+     * Returns a URL to the user's avatar
      */
-    public function getAvatar($size = 50)
+    public function getAvatar(int $size = 50): string
     {
         $default = url('/user_avatar.png');
         $imageId = $this->image_id;
@@ -229,9 +227,8 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * Get the avatar for the user.
-     * @return BelongsTo
      */
-    public function avatar()
+    public function avatar(): BelongsTo
     {
         return $this->belongsTo(Image::class, 'image_id');
     }
@@ -244,6 +241,14 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
         return $this->hasMany(ApiToken::class);
     }
 
+    /**
+     * Get the favourite instances for this user.
+     */
+    public function favourites(): HasMany
+    {
+        return $this->hasMany(Favourite::class);
+    }
+
     /**
      * Get the last activity time for this user.
      */
@@ -271,15 +276,13 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
      */
     public function getProfileUrl(): string
     {
-        return url('/user/' . $this->id);
+        return url('/user/' . $this->slug);
     }
 
     /**
      * Get a shortened version of the user's name.
-     * @param int $chars
-     * @return string
      */
-    public function getShortName($chars = 8)
+    public function getShortName(int $chars = 8): string
     {
         if (mb_strlen($this->name) <= $chars) {
             return $this->name;
@@ -310,4 +313,13 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     {
         return "({$this->id}) {$this->name}";
     }
+
+    /**
+     * @inheritDoc
+     */
+    public function refreshSlug(): string
+    {
+        $this->slug = app(SlugGenerator::class)->generate($this);
+        return $this->slug;
+    }
 }

app/Auth/UserRepo.php

@@ -8,13 +8,11 @@ use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Models\Page;
 use BookStack\Exceptions\NotFoundException;
 use BookStack\Exceptions\UserUpdateException;
-use BookStack\Uploads\Image;
 use BookStack\Uploads\UserAvatars;
 use Exception;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Pagination\LengthAwarePaginator;
-use Images;
 use Log;
 
 class UserRepo
@@ -45,6 +43,14 @@ class UserRepo
         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.
      */
@@ -159,7 +165,13 @@ class UserRepo
             'email_confirmed' => $emailConfirmed,
             'external_auth_id' => $data['external_auth_id'] ?? '',
         ];
-        return User::query()->forceCreate($details);
+
+        $user = new User();
+        $user->forceFill($details);
+        $user->refreshSlug();
+        $user->save();
+
+        return $user;
     }
 
     /**
@@ -170,16 +182,11 @@ class UserRepo
     {
         $user->socialAccounts()->delete();
         $user->apiTokens()->delete();
+        $user->favourites()->delete();
         $user->delete();
         
         // Delete user profile images
-        $profileImages = Image::query()->where('type', '=', 'user')
-            ->where('uploaded_to', '=', $user->id)
-            ->get();
-
-        foreach ($profileImages as $image) {
-            Images::destroy($image);
-        }
+        $this->userAvatar->destroyAllForUser($user);
 
         if (!empty($newOwnerId)) {
             $newOwner = User::query()->find($newOwnerId);

app/Config/app.php

@@ -19,13 +19,6 @@ return [
     // private configuration variables so should remain disabled in public.
     'debug' => env('APP_DEBUG', false),
 
-    // Set the default view type for various lists. Can be overridden by user preferences.
-    // These will be used for public viewers and users that have not set a preference.
-    'views' => [
-        'books' => env('APP_VIEWS_BOOKS', 'list'),
-        'bookshelves' => env('APP_VIEWS_BOOKSHELVES', 'grid'),
-    ],
-
     // 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.
@@ -63,7 +56,7 @@ return [
     'locale' => env('APP_LANG', 'en'),
 
     // Locales available
-    'locales' => ['en', 'ar', 'bg', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'fa', 'fr', 'he', 'hu', 'it', 'ja', 'ko', 'nl', 'nb', 'pt', 'pt_BR', 'sk', 'sl', 'sv', 'pl',  'ru', 'th', 'tr', 'uk', 'vi', 'zh_CN', 'zh_TW',],
+    'locales' => ['en', 'ar', 'bg', 'bs', 'ca', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'fa', 'fr', 'he', 'hr', 'hu', 'id', 'it', 'ja', 'ko', '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',
@@ -122,6 +115,7 @@ return [
         BookStack\Providers\TranslationServiceProvider::class,
 
         // BookStack custom service providers
+        BookStack\Providers\ThemeServiceProvider::class,
         BookStack\Providers\AuthServiceProvider::class,
         BookStack\Providers\AppServiceProvider::class,
         BookStack\Providers\BroadcastServiceProvider::class,
@@ -190,11 +184,8 @@ return [
 
         // Custom BookStack
         'Activity' => BookStack\Facades\Activity::class,
-        'Setting'  => BookStack\Facades\Setting::class,
-        'Views'    => BookStack\Facades\Views::class,
-        'Images'   => BookStack\Facades\Images::class,
         'Permissions' => BookStack\Facades\Permissions::class,
-
+        'Theme'    => BookStack\Facades\Theme::class,
     ],
 
     // Proxy configuration

app/Config/database.php

@@ -85,6 +85,7 @@ return [
             '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'    => '',

app/Config/dompdf.php

@@ -38,7 +38,7 @@ 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)
+        "DOMPDF_FONT_DIR" => storage_path('fonts/'),  // advised by dompdf (https://github.com/dompdf/dompdf/pull/782)
 
         /**
          * The location of the DOMPDF font cache directory
@@ -219,7 +219,7 @@ return [
          *
          * @var bool
          */
-        "DOMPDF_ENABLE_JAVASCRIPT" => true,
+        "DOMPDF_ENABLE_JAVASCRIPT" => false,
 
         /**
          * Enable remote file access

app/Config/mail.php

@@ -11,7 +11,7 @@
 return [
 
     // Mail driver to use.
-    // Options: smtp, mail, sendmail, log
+    // Options: smtp, sendmail, log, array
     'driver' => env('MAIL_DRIVER', 'smtp'),
 
     // SMTP host address

app/Config/saml2.php

@@ -1,5 +1,7 @@
 <?php
 
+$SAML2_IDP_AUTHNCONTEXT = env('SAML2_IDP_AUTHNCONTEXT', true);
+
 return [
 
     // Display name, shown to users, for SAML2 option
@@ -139,6 +141,14 @@ return [
             //      )
             // ),
         ],
+        '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,
+        ],
     ],
 
 ];

app/Config/services.php

@@ -132,6 +132,8 @@ return [
         '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),
     ],
 
 ];

app/Config/session.php

@@ -59,7 +59,7 @@ return [
     // 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' => '/',
+    'path' => '/' . (explode('/', env('APP_URL', ''), 4)[3] ?? ''),
 
     // Session Cookie Domain
     // Here you may change the domain of the cookie used to identify a session

app/Config/setting-defaults.php

@@ -24,4 +24,12 @@ return [
     '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'),
+    ],
+
 ];

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
@@ -36,7 +37,7 @@ class ClearViews extends Command
      */
     public function handle()
     {
-        \Views::resetAll();
+        View::clearAll();
         $this->comment('Views cleared');
     }
 }

app/Console/Commands/UpdateUrl.php

@@ -4,6 +4,7 @@ namespace BookStack\Console\Commands;
 
 use Illuminate\Console\Command;
 use Illuminate\Database\Connection;
+use Illuminate\Support\Facades\DB;
 
 class UpdateUrl extends Command
 {
@@ -60,22 +61,50 @@ class UpdateUrl extends Command
             "attachments" => ["path"],
             "pages" => ["html", "text", "markdown"],
             "images" => ["url"],
+            "settings" => ["value"],
             "comments" => ["html", "text"],
         ];
 
         foreach ($columnsToUpdateByTable as $table => $columns) {
             foreach ($columns as $column) {
-                $changeCount = $this->db->table($table)->update([
-                    $column => $this->db->raw("REPLACE({$column}, '{$oldUrl}', '{$newUrl}')")
-                ]);
+                $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.

app/Entities/Models/BookChild.php

@@ -1,8 +1,5 @@
 <?php namespace BookStack\Entities\Models;
 
-use BookStack\Entities\Models\Chapter;
-use BookStack\Entities\Models\Entity;
-use BookStack\Entities\Models\Book;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
@@ -49,7 +46,7 @@ abstract class BookChild extends Entity
 
         // Update all child pages if a chapter
         if ($this instanceof Chapter) {
-            foreach ($this->pages as $page) {
+            foreach ($this->pages()->withTrashed()->get() as $page) {
                 $page->changeBook($newBookId);
             }
         }

app/Entities/Models/Entity.php

@@ -2,6 +2,7 @@
 
 use BookStack\Actions\Activity;
 use BookStack\Actions\Comment;
+use BookStack\Actions\Favourite;
 use BookStack\Actions\Tag;
 use BookStack\Actions\View;
 use BookStack\Auth\Permissions\EntityPermission;
@@ -9,6 +10,9 @@ use BookStack\Auth\Permissions\JointPermission;
 use BookStack\Entities\Tools\SearchIndex;
 use BookStack\Entities\Tools\SlugGenerator;
 use BookStack\Facades\Permissions;
+use BookStack\Interfaces\Favouritable;
+use BookStack\Interfaces\Sluggable;
+use BookStack\Interfaces\Viewable;
 use BookStack\Model;
 use BookStack\Traits\HasCreatorAndUpdater;
 use BookStack\Traits\HasOwner;
@@ -37,7 +41,7 @@ use Illuminate\Database\Eloquent\SoftDeletes;
  * @method static Builder withLastView()
  * @method static Builder withViewCount()
  */
-abstract class Entity extends Model
+abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
 {
     use SoftDeletes;
     use HasCreatorAndUpdater;
@@ -289,11 +293,29 @@ abstract class Entity extends Model
     }
 
     /**
-     * Generate and set a new URL slug for this model.
+     * @inheritdoc
      */
     public function refreshSlug(): string
     {
-        $this->slug = (new SlugGenerator)->generate($this);
+        $this->slug = app(SlugGenerator::class)->generate($this);
         return $this->slug;
     }
+
+    /**
+     * @inheritdoc
+     */
+    public function favourites(): MorphMany
+    {
+        return $this->morphMany(Favourite::class, 'favouritable');
+    }
+
+    /**
+     * Check if the entity is a favourite of the current user.
+     */
+    public function isFavourite(): bool
+    {
+        return $this->favourites()
+            ->where('user_id', '=', user()->id)
+            ->exists();
+    }
 }

app/Entities/Models/Page.php

@@ -40,7 +40,7 @@ class Page extends BookChild
      */
     public function scopeVisible(Builder $query): Builder
     {
-        $query = Permissions::enforceDraftVisiblityOnQuery($query);
+        $query = Permissions::enforceDraftVisibilityOnQuery($query);
         return parent::scopeVisible($query);
     }
 
@@ -75,11 +75,23 @@ class Page extends BookChild
 
     /**
      * Get the associated page revisions, ordered by created date.
-     * @return mixed
+     * Only provides actual saved page revision instances, Not drafts.
      */
-    public function revisions()
+    public function revisions(): HasMany
     {
-        return $this->hasMany(PageRevision::class)->where('type', '=', 'version')->orderBy('created_at', 'desc')->orderBy('id', 'desc');
+        return $this->allRevisions()
+            ->where('type', '=', 'version')
+            ->orderBy('created_at', 'desc')
+            ->orderBy('id', 'desc');
+    }
+
+    /**
+     * Get all revision instances assigned to this page.
+     * Includes all types of revisions.
+     */
+    public function allRevisions(): HasMany
+    {
+        return $this->hasMany(PageRevision::class);
     }
 
     /**

app/Entities/Queries/EntityQuery.php

@@ -0,0 +1,17 @@
+<?php namespace BookStack\Entities\Queries;
+
+use BookStack\Auth\Permissions\PermissionService;
+use BookStack\Entities\EntityProvider;
+
+abstract class EntityQuery
+{
+    protected function permissionService(): PermissionService
+    {
+        return app()->make(PermissionService::class);
+    }
+
+    protected function entityProvider(): EntityProvider
+    {
+        return app()->make(EntityProvider::class);
+    }
+}

app/Entities/Queries/Popular.php

@@ -0,0 +1,29 @@
+<?php namespace BookStack\Entities\Queries;
+
+
+use BookStack\Actions\View;
+use Illuminate\Support\Facades\DB;
+
+class Popular extends EntityQuery
+{
+    public function run(int $count, int $page, array $filterModels = null, string $action = 'view')
+    {
+        $query = $this->permissionService()
+            ->filterRestrictedEntityRelations(View::query(), 'views', 'viewable_id', 'viewable_type', $action)
+            ->select('*', 'viewable_id', 'viewable_type', DB::raw('SUM(views) as view_count'))
+            ->groupBy('viewable_id', 'viewable_type')
+            ->orderBy('view_count', 'desc');
+
+        if ($filterModels) {
+            $query->whereIn('viewable_type', $this->entityProvider()->getMorphClasses($filterModels));
+        }
+
+        return $query->with('viewable')
+            ->skip($count * ($page - 1))
+            ->take($count)
+            ->get()
+            ->pluck('viewable')
+            ->filter();
+    }
+
+}

app/Entities/Queries/RecentlyViewed.php

@@ -0,0 +1,32 @@
+<?php namespace BookStack\Entities\Queries;
+
+use BookStack\Actions\View;
+use Illuminate\Support\Collection;
+
+class RecentlyViewed extends EntityQuery
+{
+    public function run(int $count, int $page): Collection
+    {
+        $user = user();
+        if ($user === null || $user->isDefault()) {
+            return collect();
+        }
+
+        $query = $this->permissionService()->filterRestrictedEntityRelations(
+            View::query(),
+            'views',
+            'viewable_id',
+            'viewable_type',
+            'view'
+        )
+            ->orderBy('views.updated_at', 'desc')
+            ->where('user_id', '=', user()->id);
+
+        return $query->with('viewable')
+            ->skip(($page - 1) * $count)
+            ->take($count)
+            ->get()
+            ->pluck('viewable')
+            ->filter();
+    }
+}

app/Entities/Queries/TopFavourites.php

@@ -0,0 +1,33 @@
+<?php namespace BookStack\Entities\Queries;
+
+use BookStack\Actions\Favourite;
+use Illuminate\Database\Query\JoinClause;
+
+class TopFavourites extends EntityQuery
+{
+    public function run(int $count, int $skip = 0)
+    {
+        $user = user();
+        if (is_null($user) || $user->isDefault()) {
+            return collect();
+        }
+
+        $query = $this->permissionService()
+            ->filterRestrictedEntityRelations(Favourite::query(), 'favourites', 'favouritable_id', 'favouritable_type', 'view')
+            ->select('favourites.*')
+            ->leftJoin('views', function (JoinClause $join) {
+                $join->on('favourites.favouritable_id', '=', 'views.viewable_id');
+                $join->on('favourites.favouritable_type', '=', 'views.viewable_type');
+                $join->where('views.user_id', '=', user()->id);
+            })
+            ->orderBy('views.views', 'desc')
+            ->where('favourites.user_id', '=', user()->id);
+
+        return $query->with('favouritable')
+            ->skip($skip)
+            ->take($count)
+            ->get()
+            ->pluck('favouritable')
+            ->filter();
+    }
+}

app/Entities/Repos/PageRepo.php

@@ -177,25 +177,24 @@ class PageRepo
         // Hold the old details to compare later
         $oldHtml = $page->html;
         $oldName = $page->name;
+        $oldMarkdown = $page->markdown;
 
         $this->updateTemplateStatusAndContentFromInput($page, $input);
         $this->baseRepo->update($page, $input);
 
         // Update with new details
         $page->revision_count++;
-
-        if (setting('app-editor') !== 'markdown') {
-            $page->markdown = '';
-        }
-
         $page->save();
 
         // Remove all update drafts for this user & page.
         $this->getUserDraftQuery($page)->delete();
 
         // Save a revision after updating
-        $summary = $input['summary'] ?? null;
-        if ($oldHtml !== $input['html'] || $oldName !== $input['name'] || $summary !== null) {
+        $summary = trim($input['summary'] ?? "");
+        $htmlChanged = isset($input['html']) && $input['html'] !== $oldHtml;
+        $nameChanged = isset($input['name']) && $input['name'] !== $oldName;
+        $markdownChanged = isset($input['markdown']) && $input['markdown'] !== $oldMarkdown;
+        if ($htmlChanged || $nameChanged || $markdownChanged || $summary) {
             $this->savePageRevision($page, $summary);
         }
 
@@ -213,7 +212,7 @@ class PageRepo
         if (!empty($input['markdown'] ?? '')) {
             $pageContent->setNewMarkdown($input['markdown']);
         } else {
-            $pageContent->setNewHTML($input['html']);
+            $pageContent->setNewHTML($input['html'] ?? '');
         }
     }
 
@@ -224,10 +223,6 @@ class PageRepo
     {
         $revision = new PageRevision($page->getAttributes());
 
-        if (setting('app-editor') !== 'markdown') {
-            $revision->markdown = '';
-        }
-
         $revision->page_id = $page->id;
         $revision->slug = $page->slug;
         $revision->book_slug = $page->book->slug;
@@ -290,7 +285,13 @@ class PageRepo
 
         $page->fill($revision->toArray());
         $content = new PageContent($page);
-        $content->setNewHTML($revision->html);
+
+        if (!empty($revision->markdown)) {
+            $content->setNewMarkdown($revision->markdown);
+        } else {
+            $content->setNewHTML($revision->html);
+        }
+        
         $page->updated_by = user()->id;
         $page->refreshSlug();
         $page->save();

app/Entities/Tools/Markdown/CustomStrikeThroughExtension.php

@@ -13,4 +13,4 @@ class CustomStrikeThroughExtension implements ExtensionInterface
         $environment->addDelimiterProcessor(new StrikethroughDelimiterProcessor());
         $environment->addInlineRenderer(Strikethrough::class, new CustomStrikethroughRenderer());
     }
-}
+}

app/Entities/Tools/Markdown/CustomStrikethroughRenderer.php

@@ -21,4 +21,4 @@ class CustomStrikethroughRenderer implements InlineRendererInterface
 
         return new HtmlElement('s', $inline->getData('attributes', []), $htmlRenderer->renderInlines($inline->children()));
     }
-}
+}

app/Entities/Tools/NextPreviousContentLocator.php

@@ -0,0 +1,69 @@
+<?php namespace BookStack\Entities\Tools;
+
+use BookStack\Entities\Models\BookChild;
+use BookStack\Entities\Models\Entity;
+use Illuminate\Support\Collection;
+
+/**
+ * Finds the next or previous content of a book element (page or chapter).
+ */
+class NextPreviousContentLocator
+{
+    protected $relativeBookItem;
+    protected $flatTree;
+    protected $currentIndex = null;
+
+    /**
+     * NextPreviousContentLocator constructor.
+     */
+    public function __construct(BookChild $relativeBookItem, Collection $bookTree)
+    {
+        $this->relativeBookItem = $relativeBookItem;
+        $this->flatTree = $this->treeToFlatOrderedCollection($bookTree);
+        $this->currentIndex = $this->getCurrentIndex();
+    }
+
+    /**
+     * Get the next logical entity within the book hierarchy.
+     */
+    public function getNext(): ?Entity
+    {
+        return $this->flatTree->get($this->currentIndex + 1);
+    }
+
+    /**
+     * Get the next logical entity within the book hierarchy.
+     */
+    public function getPrevious(): ?Entity
+    {
+        return $this->flatTree->get($this->currentIndex - 1);
+    }
+
+    /**
+     * Get the index of the current relative item.
+     */
+    protected function getCurrentIndex(): ?int
+    {
+        $index = $this->flatTree->search(function (Entity $entity) {
+            return get_class($entity) === get_class($this->relativeBookItem)
+                && $entity->id === $this->relativeBookItem->id;
+        });
+        return $index === false ? null : $index;
+    }
+
+    /**
+     * Convert a book tree collection to a flattened version
+     * where all items follow the expected order of user flow.
+     */
+    protected function treeToFlatOrderedCollection(Collection $bookTree): Collection
+    {
+        $flatOrdered = collect();
+        /** @var Entity $item */
+        foreach ($bookTree->all() as $item) {
+            $flatOrdered->push($item);
+            $childPages = $item->visible_pages ?? [];
+            $flatOrdered = $flatOrdered->concat($childPages);
+        }
+        return $flatOrdered;
+    }
+}

app/Entities/Tools/PageContent.php

@@ -2,9 +2,15 @@
 
 use BookStack\Entities\Models\Page;
 use BookStack\Entities\Tools\Markdown\CustomStrikeThroughExtension;
+use BookStack\Exceptions\ImageUploadException;
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
+use BookStack\Util\HtmlContentFilter;
+use BookStack\Uploads\ImageRepo;
 use DOMDocument;
 use DOMNodeList;
 use DOMXPath;
+use Illuminate\Support\Str;
 use League\CommonMark\CommonMarkConverter;
 use League\CommonMark\Environment;
 use League\CommonMark\Extension\Table\TableExtension;
@@ -28,6 +34,7 @@ class PageContent
      */
     public function setNewHTML(string $html)
     {
+        $html = $this->extractBase64Images($this->page, $html);
         $this->page->html = $this->formatHtml($html);
         $this->page->text = $this->toPlainText();
         $this->page->markdown = '';
@@ -53,23 +60,70 @@ class PageContent
         $environment->addExtension(new TableExtension());
         $environment->addExtension(new TaskListExtension());
         $environment->addExtension(new CustomStrikeThroughExtension());
+        $environment = Theme::dispatch(ThemeEvents::COMMONMARK_ENVIRONMENT_CONFIGURE, $environment) ?? $environment;
         $converter = new CommonMarkConverter([], $environment);
         return $converter->convertToHtml($markdown);
     }
 
+    /**
+     * Convert all base64 image data to saved images
+     */
+    public function extractBase64Images(Page $page, string $htmlText): string
+    {
+        if (empty($htmlText) || strpos($htmlText, 'data:image') === false) {
+            return $htmlText;
+        }
+
+        $doc = $this->loadDocumentFromHtml($htmlText);
+        $container = $doc->documentElement;
+        $body = $container->childNodes->item(0);
+        $childNodes = $body->childNodes;
+        $xPath = new DOMXPath($doc);
+        $imageRepo = app()->make(ImageRepo::class);
+        $allowedExtensions = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
+
+        // Get all img elements with image data blobs
+        $imageNodes = $xPath->query('//img[contains(@src, \'data:image\')]');
+        foreach ($imageNodes as $imageNode) {
+            $imageSrc = $imageNode->getAttribute('src');
+            [$dataDefinition, $base64ImageData] = explode(',', $imageSrc, 2);
+            $extension = strtolower(preg_split('/[\/;]/', $dataDefinition)[1] ?? 'png');
+
+            // Validate extension
+            if (!in_array($extension, $allowedExtensions)) {
+                $imageNode->setAttribute('src', '');
+                continue;
+            }
+
+            // Save image from data with a random name
+            $imageName = 'embedded-image-' . Str::random(8) . '.' . $extension;
+            try {
+                $image = $imageRepo->saveNewFromData($imageName, base64_decode($base64ImageData), 'gallery', $page->id);
+                $imageNode->setAttribute('src', $image->url);
+            } catch (ImageUploadException $exception) {
+                $imageNode->setAttribute('src', '');
+            }
+        }
+
+        // Generate inner html as a string
+        $html = '';
+        foreach ($childNodes as $childNode) {
+            $html .= $doc->saveHTML($childNode);
+        }
+
+        return $html;
+    }
+
     /**
      * Formats a page's html to be tagged correctly within the system.
      */
     protected function formatHtml(string $htmlText): string
     {
-        if ($htmlText == '') {
+        if (empty($htmlText)) {
             return $htmlText;
         }
 
-        libxml_use_internal_errors(true);
-        $doc = new DOMDocument();
-        $doc->loadHTML(mb_convert_encoding($htmlText, 'HTML-ENTITIES', 'UTF-8'));
-
+        $doc = $this->loadDocumentFromHtml($htmlText);
         $container = $doc->documentElement;
         $body = $container->childNodes->item(0);
         $childNodes = $body->childNodes;
@@ -108,7 +162,7 @@ class PageContent
     protected function updateLinks(DOMXPath $xpath, string $old, string $new)
     {
         $old = str_replace('"', '', $old);
-        $matchingLinks = $xpath->query('//body//*//*[@href="'.$old.'"]');
+        $matchingLinks = $xpath->query('//body//*//*[@href="' . $old . '"]');
         foreach ($matchingLinks as $domElem) {
             $domElem->setAttribute('href', $new);
         }
@@ -161,12 +215,12 @@ class PageContent
     /**
      * Render the page for viewing
      */
-    public function render(bool $blankIncludes = false) : string
+    public function render(bool $blankIncludes = false): string
     {
         $content = $this->page->html;
 
         if (!config('app.allow_content_scripts')) {
-            $content = $this->escapeScripts($content);
+            $content = HtmlContentFilter::removeScripts($content);
         }
 
         if ($blankIncludes) {
@@ -187,9 +241,7 @@ class PageContent
             return [];
         }
 
-        libxml_use_internal_errors(true);
-        $doc = new DOMDocument();
-        $doc->loadHTML(mb_convert_encoding($htmlContent, 'HTML-ENTITIES', 'UTF-8'));
+        $doc = $this->loadDocumentFromHtml($htmlContent);
         $xPath = new DOMXPath($doc);
         $headers = $xPath->query("//h1|//h2|//h3|//h4|//h5|//h6");
 
@@ -229,7 +281,7 @@ class PageContent
     /**
      * Remove any page include tags within the given HTML.
      */
-    protected function blankPageIncludes(string $html) : string
+    protected function blankPageIncludes(string $html): string
     {
         return preg_replace("/{{@\s?([0-9].*?)}}/", '', $html);
     }
@@ -237,7 +289,7 @@ class PageContent
     /**
      * Parse any include tags "{{@<page_id>#section}}" to be part of the page.
      */
-    protected function parsePageIncludes(string $html) : string
+    protected function parsePageIncludes(string $html): string
     {
         $matches = [];
         preg_match_all("/{{@\s?([0-9].*?)}}/", $html, $matches);
@@ -280,9 +332,7 @@ class PageContent
     protected function fetchSectionOfPage(Page $page, string $sectionId): string
     {
         $topLevelTags = ['table', 'ul', 'ol'];
-        $doc = new DOMDocument();
-        libxml_use_internal_errors(true);
-        $doc->loadHTML(mb_convert_encoding('<body>'.$page->html.'</body>', 'HTML-ENTITIES', 'UTF-8'));
+        $doc = $this->loadDocumentFromHtml($page->html);
 
         // Search included content for the id given and blank out if not exists.
         $matchingElem = $doc->getElementById($sectionId);
@@ -307,63 +357,14 @@ class PageContent
     }
 
     /**
-     * Escape script tags within HTML content.
+     * Create and load a DOMDocument from the given html content.
      */
-    protected function escapeScripts(string $html) : string
+    protected function loadDocumentFromHtml(string $html): DOMDocument
     {
-        if (empty($html)) {
-            return $html;
-        }
-
         libxml_use_internal_errors(true);
         $doc = new DOMDocument();
+        $html = '<body>' . $html . '</body>';
         $doc->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
-        $xPath = new DOMXPath($doc);
-
-        // Remove standard script tags
-        $scriptElems = $xPath->query('//script');
-        foreach ($scriptElems as $scriptElem) {
-            $scriptElem->parentNode->removeChild($scriptElem);
-        }
-
-        // Remove clickable links to JavaScript URI
-        $badLinks = $xPath->query('//*[contains(@href, \'javascript:\')]');
-        foreach ($badLinks as $badLink) {
-            $badLink->parentNode->removeChild($badLink);
-        }
-
-        // Remove forms with calls to JavaScript URI
-        $badForms = $xPath->query('//*[contains(@action, \'javascript:\')] | //*[contains(@formaction, \'javascript:\')]');
-        foreach ($badForms as $badForm) {
-            $badForm->parentNode->removeChild($badForm);
-        }
-
-        // Remove meta tag to prevent external redirects
-        $metaTags = $xPath->query('//meta[contains(@content, \'url\')]');
-        foreach ($metaTags as $metaTag) {
-            $metaTag->parentNode->removeChild($metaTag);
-        }
-
-        // Remove data or JavaScript iFrames
-        $badIframes = $xPath->query('//*[contains(@src, \'data:\')] | //*[contains(@src, \'javascript:\')] | //*[@srcdoc]');
-        foreach ($badIframes as $badIframe) {
-            $badIframe->parentNode->removeChild($badIframe);
-        }
-
-        // Remove 'on*' attributes
-        $onAttributes = $xPath->query('//@*[starts-with(name(), \'on\')]');
-        foreach ($onAttributes as $attr) {
-            /** @var \DOMAttr $attr*/
-            $attrName = $attr->nodeName;
-            $attr->parentNode->removeAttribute($attrName);
-        }
-
-        $html = '';
-        $topElems = $doc->documentElement->childNodes->item(0)->childNodes;
-        foreach ($topElems as $child) {
-            $html .= $doc->saveHTML($child);
-        }
-
-        return $html;
+        return $doc;
     }
 }

app/Entities/Tools/SearchOptions.php

@@ -137,5 +137,4 @@ class SearchOptions
 
         return $string;
     }
-
-}
+}

app/Entities/Tools/SearchRunner.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Entities\Tools;
 
 use BookStack\Auth\Permissions\PermissionService;
+use BookStack\Auth\User;
 use BookStack\Entities\EntityProvider;
 use BookStack\Entities\Models\Entity;
 use Illuminate\Database\Connection;
@@ -178,7 +179,7 @@ class SearchRunner
             }
         }
 
-        return $this->permissionService->enforceEntityRestrictions($entityType, $entitySelect, $action);
+        return $this->permissionService->enforceEntityRestrictions($entity, $entitySelect, $action);
     }
 
     /**
@@ -270,24 +271,29 @@ class SearchRunner
 
     protected function filterCreatedBy(EloquentBuilder $query, Entity $model, $input)
     {
-        if (!is_numeric($input) && $input !== 'me') {
-            return;
+        $userSlug = $input === 'me' ? user()->slug : trim($input);
+        $user = User::query()->where('slug', '=', $userSlug)->first(['id']);
+        if ($user) {
+            $query->where('created_by', '=', $user->id);
         }
-        if ($input === 'me') {
-            $input = user()->id;
-        }
-        $query->where('created_by', '=', $input);
     }
 
     protected function filterUpdatedBy(EloquentBuilder $query, Entity $model, $input)
     {
-        if (!is_numeric($input) && $input !== 'me') {
-            return;
+        $userSlug = $input === 'me' ? user()->slug : trim($input);
+        $user = User::query()->where('slug', '=', $userSlug)->first(['id']);
+        if ($user) {
+            $query->where('updated_by', '=', $user->id);
         }
-        if ($input === 'me') {
-            $input = user()->id;
+    }
+
+    protected function filterOwnedBy(EloquentBuilder $query, Entity $model, $input)
+    {
+        $userSlug = $input === 'me' ? user()->slug : trim($input);
+        $user = User::query()->where('slug', '=', $userSlug)->first(['id']);
+        if ($user) {
+            $query->where('owned_by', '=', $user->id);
         }
-        $query->where('updated_by', '=', $input);
     }
 
     protected function filterInName(EloquentBuilder $query, Entity $model, $input)

app/Entities/Tools/SlugGenerator.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Entities\Tools;
 
-use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\BookChild;
+use BookStack\Interfaces\Sluggable;
 use Illuminate\Support\Str;
 
 class SlugGenerator
@@ -10,11 +11,11 @@ class SlugGenerator
      * Generate a fresh slug for the given entity.
      * The slug will generated so it does not conflict within the same parent item.
      */
-    public function generate(Entity $entity): string
+    public function generate(Sluggable $model): string
     {
-        $slug = $this->formatNameAsSlug($entity->name);
-        while ($this->slugInUse($slug, $entity)) {
-            $slug .= '-' . substr(md5(rand(1, 500)), 0, 3);
+        $slug = $this->formatNameAsSlug($model->name);
+        while ($this->slugInUse($slug, $model)) {
+            $slug .= '-' . Str::random(3);
         }
         return $slug;
     }
@@ -35,16 +36,16 @@ class SlugGenerator
      * Check if a slug is already in-use for this
      * type of model within the same parent.
      */
-    protected function slugInUse(string $slug, Entity $entity): bool
+    protected function slugInUse(string $slug, Sluggable $model): bool
     {
-        $query = $entity->newQuery()->where('slug', '=', $slug);
+        $query = $model->newQuery()->where('slug', '=', $slug);
 
-        if ($entity instanceof BookChild) {
-            $query->where('book_id', '=', $entity->book_id);
+        if ($model instanceof BookChild) {
+            $query->where('book_id', '=', $model->book_id);
         }
 
-        if ($entity->id) {
-            $query->where('id', '!=', $entity->id);
+        if ($model->id) {
+            $query->where('id', '!=', $model->id);
         }
 
         return $query->count() > 0;

app/Entities/Tools/TrashCan.php

@@ -151,6 +151,7 @@ class TrashCan
     protected function destroyPage(Page $page): int
     {
         $this->destroyCommonRelations($page);
+        $page->allRevisions()->delete();
 
         // Delete Attached Files
         $attachmentService = app(AttachmentService::class);
@@ -273,11 +274,11 @@ class TrashCan
             $count++;
         };
 
-        if ($entity->isA('chapter') || $entity->isA('book')) {
+        if ($entity instanceof Chapter || $entity instanceof Book) {
             $entity->pages()->withTrashed()->withCount('deletions')->get()->each($restoreAction);
         }
 
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             $entity->chapters()->withTrashed()->withCount('deletions')->get()->each($restoreAction);
         }
 
@@ -286,19 +287,20 @@ class TrashCan
 
     /**
      * Destroy the given entity.
+     * @throws Exception
      */
     protected function destroyEntity(Entity $entity): int
     {
-        if ($entity->isA('page')) {
+        if ($entity instanceof Page) {
             return $this->destroyPage($entity);
         }
-        if ($entity->isA('chapter')) {
+        if ($entity instanceof Chapter) {
             return $this->destroyChapter($entity);
         }
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             return $this->destroyBook($entity);
         }
-        if ($entity->isA('shelf')) {
+        if ($entity instanceof Bookshelf) {
             return $this->destroyShelf($entity);
         }
     }
@@ -316,6 +318,7 @@ class TrashCan
         $entity->jointPermissions()->delete();
         $entity->searchTerms()->delete();
         $entity->deletions()->delete();
+        $entity->favourites()->delete();
 
         if ($entity instanceof HasCoverImage && $entity->cover) {
             $imageService = app()->make(ImageService::class);

app/Exceptions/ApiAuthException.php

@@ -2,6 +2,7 @@
 
 namespace BookStack\Exceptions;
 
-class ApiAuthException extends UnauthorizedException {
+class ApiAuthException extends UnauthorizedException
+{
 
-}
+}

app/Exceptions/Handler.php

@@ -3,49 +3,52 @@
 namespace BookStack\Exceptions;
 
 use Exception;
-use Illuminate\Auth\Access\AuthorizationException;
 use Illuminate\Auth\AuthenticationException;
-use Illuminate\Database\Eloquent\ModelNotFoundException;
 use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Validation\ValidationException;
 use Symfony\Component\HttpKernel\Exception\HttpException;
-use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 class Handler extends ExceptionHandler
 {
     /**
-     * A list of the exception types that should not be reported.
+     * A list of the exception types that are not reported.
      *
      * @var array
      */
     protected $dontReport = [
-        AuthorizationException::class,
-        HttpException::class,
-        ModelNotFoundException::class,
-        ValidationException::class,
         NotFoundException::class,
     ];
 
     /**
-     * Report or log an exception.
-     * This is a great spot to send exceptions to Sentry, Bugsnag, etc.
+     * A list of the inputs that are never flashed for validation exceptions.
+     *
+     * @var array
+     */
+    protected $dontFlash = [
+        'password',
+        'password_confirmation',
+    ];
+
+    /**
+     * Report or log an exception.
+     *
+     * @param Exception $exception
+     * @return void
      *
-     * @param  \Exception $e
-     * @return mixed
      * @throws Exception
      */
-    public function report(Exception $e)
+    public function report(Exception $exception)
     {
-        return parent::report($e);
+        parent::report($exception);
     }
 
     /**
      * Render an exception into an HTTP response.
      *
      * @param  \Illuminate\Http\Request $request
-     * @param  \Exception $e
+     * @param Exception $e
      * @return \Illuminate\Http\Response
      */
     public function render($request, Exception $e)
@@ -54,29 +57,6 @@ class Handler extends ExceptionHandler
             return $this->renderApiException($e);
         }
 
-        // Handle notify exceptions which will redirect to the
-        // specified location then show a notification message.
-        if ($this->isExceptionType($e, NotifyException::class)) {
-            $message = $this->getOriginalMessage($e);
-            if (!empty($message)) {
-                session()->flash('error', $message);
-            }
-            return redirect($e->redirectLocation);
-        }
-
-        // Handle pretty exceptions which will show a friendly application-fitting page
-        // Which will include the basic message to point the user roughly to the cause.
-        if ($this->isExceptionType($e, PrettyException::class)  && !config('app.debug')) {
-            $message = $this->getOriginalMessage($e);
-            $code = ($e->getCode() === 0) ? 500 : $e->getCode();
-            return response()->view('errors/' . $code, ['message' => $message], $code);
-        }
-
-        // Handle 404 errors with a loaded session to enable showing user-specific information
-        if ($this->isExceptionType($e, NotFoundHttpException::class)) {
-            return \Route::respondWithRoute('fallback');
-        }
-
         return parent::render($request, $e);
     }
 
@@ -115,35 +95,6 @@ class Handler extends ExceptionHandler
         return new JsonResponse($responseData, $code, $headers);
     }
 
-    /**
-     * Check the exception chain to compare against the original exception type.
-     * @param Exception $e
-     * @param $type
-     * @return bool
-     */
-    protected function isExceptionType(Exception $e, $type)
-    {
-        do {
-            if (is_a($e, $type)) {
-                return true;
-            }
-        } while ($e = $e->getPrevious());
-        return false;
-    }
-
-    /**
-     * Get original exception message.
-     * @param Exception $e
-     * @return string
-     */
-    protected function getOriginalMessage(Exception $e)
-    {
-        do {
-            $message = $e->getMessage();
-        } while ($e = $e->getPrevious());
-        return $message;
-    }
-
     /**
      * Convert an authentication exception into an unauthenticated response.
      *

app/Exceptions/JsonDebugException.php

@@ -22,4 +22,4 @@ class JsonDebugException extends Exception
     {
         return response()->json($this->data);
     }
-}
+}

app/Exceptions/NotFoundException.php

@@ -5,7 +5,6 @@ class NotFoundException extends PrettyException
 
     /**
      * NotFoundException constructor.
-     * @param string $message
      */
     public function __construct($message = 'Item not found')
     {

app/Exceptions/NotifyException.php

@@ -1,8 +1,10 @@
 <?php namespace BookStack\Exceptions;
 
-class NotifyException extends \Exception
-{
+use Exception;
+use Illuminate\Contracts\Support\Responsable;
 
+class NotifyException extends Exception implements Responsable
+{
     public $message;
     public $redirectLocation;
 
@@ -15,4 +17,19 @@ class NotifyException extends \Exception
         $this->redirectLocation = $redirectLocation;
         parent::__construct();
     }
+
+    /**
+     * Send the response for this type of exception.
+     * @inheritdoc
+     */
+    public function toResponse($request)
+    {
+        $message = $this->getMessage();
+
+        if (!empty($message)) {
+            session()->flash('error', $message);
+        }
+
+        return redirect($this->redirectLocation);
+    }
 }

app/Exceptions/PrettyException.php

@@ -1,6 +1,43 @@
 <?php namespace BookStack\Exceptions;
 
-class PrettyException extends \Exception
-{
+use Exception;
+use Illuminate\Contracts\Support\Responsable;
 
+class PrettyException extends Exception implements Responsable
+{
+    /**
+     * @var ?string
+     */
+    protected $subtitle = null;
+
+    /**
+     * @var ?string
+     */
+    protected $details = null;
+
+    /**
+     * Render a response for when this exception occurs.
+     * @inheritdoc
+     */
+    public function toResponse($request)
+    {
+        $code = ($this->getCode() === 0) ? 500 : $this->getCode();
+        return response()->view('errors.' . $code, [
+            'message' => $this->getMessage(),
+            'subtitle' => $this->subtitle,
+            'details' => $this->details,
+        ], $code);
+    }
+
+    public function setSubtitle(string $subtitle): self
+    {
+        $this->subtitle = $subtitle;
+        return $this;
+    }
+
+    public function setDetails(string $details): self
+    {
+        $this->details = $details;
+        return $this;
+    }
 }

app/Exceptions/UnauthorizedException.php

@@ -14,4 +14,4 @@ class UnauthorizedException extends Exception
     {
         parent::__construct($message, $code);
     }
-}
+}

app/Facades/Setting.php

@@ -1,16 +0,0 @@
-<?php namespace BookStack\Facades;
-
-use Illuminate\Support\Facades\Facade;
-
-class Setting extends Facade
-{
-    /**
-     * Get the registered name of the component.
-     *
-     * @return string
-     */
-    protected static function getFacadeAccessor()
-    {
-        return 'setting';
-    }
-}

app/Facades/Theme.php

@@ -1,8 +1,9 @@
 <?php namespace BookStack\Facades;
 
+use BookStack\Theming\ThemeService;
 use Illuminate\Support\Facades\Facade;
 
-class Images extends Facade
+class Theme extends Facade
 {
     /**
      * Get the registered name of the component.
@@ -11,6 +12,6 @@ class Images extends Facade
      */
     protected static function getFacadeAccessor()
     {
-        return 'images';
+        return ThemeService::class;
     }
 }

app/Facades/Views.php

@@ -1,16 +0,0 @@
-<?php namespace BookStack\Facades;
-
-use Illuminate\Support\Facades\Facade;
-
-class Views extends Facade
-{
-    /**
-     * Get the registered name of the component.
-     *
-     * @return string
-     */
-    protected static function getFacadeAccessor()
-    {
-        return 'views';
-    }
-}

app/Http/Controllers/Api/ApiController.php

@@ -27,4 +27,4 @@ abstract class ApiController extends Controller
     {
         return $this->rules;
     }
-}
+}

app/Http/Controllers/Api/ApiDocsController.php

@@ -25,5 +25,4 @@ class ApiDocsController extends ApiController
         $docs = ApiDocsGenerator::generateConsideringCache();
         return response()->json($docs);
     }
-
 }

app/Http/Controllers/Api/BookApiController.php

@@ -91,4 +91,4 @@ class BookApiController extends ApiController
         $this->bookRepo->destroy($book);
         return response('', 204);
     }
-}
+}

app/Http/Controllers/Api/BookshelfApiController.php

@@ -112,4 +112,4 @@ class BookshelfApiController extends ApiController
         $this->bookshelfRepo->destroy($shelf);
         return response('', 204);
     }
-}
+}

app/Http/Controllers/Api/PageApiController.php

@@ -60,6 +60,8 @@ class PageApiController extends ApiController
      *
      * Any HTML content provided should be kept to a single-block depth of plain HTML
      * elements to remain compatible with the BookStack front-end and editors.
+     * Any images included via base64 data URIs will be extracted and saved as gallery
+     * images against the page during upload.
      */
     public function create(Request $request)
     {

app/Http/Controllers/AttachmentController.php

@@ -14,16 +14,14 @@ use Illuminate\Validation\ValidationException;
 class AttachmentController extends Controller
 {
     protected $attachmentService;
-    protected $attachment;
     protected $pageRepo;
 
     /**
      * AttachmentController constructor.
      */
-    public function __construct(AttachmentService $attachmentService, Attachment $attachment, PageRepo $pageRepo)
+    public function __construct(AttachmentService $attachmentService, PageRepo $pageRepo)
     {
         $this->attachmentService = $attachmentService;
-        $this->attachment = $attachment;
         $this->pageRepo = $pageRepo;
     }
 
@@ -67,7 +65,7 @@ class AttachmentController extends Controller
             'file' => 'required|file'
         ]);
 
-        $attachment = $this->attachment->newQuery()->findOrFail($attachmentId);
+        $attachment = Attachment::query()->findOrFail($attachmentId);
         $this->checkOwnablePermission('view', $attachment->page);
         $this->checkOwnablePermission('page-update', $attachment->page);
         $this->checkOwnablePermission('attachment-create', $attachment);
@@ -89,7 +87,7 @@ class AttachmentController extends Controller
      */
     public function getUpdateForm(string $attachmentId)
     {
-        $attachment = $this->attachment->findOrFail($attachmentId);
+        $attachment = Attachment::query()->findOrFail($attachmentId);
 
         $this->checkOwnablePermission('page-update', $attachment->page);
         $this->checkOwnablePermission('attachment-create', $attachment);
@@ -104,8 +102,8 @@ class AttachmentController extends Controller
      */
     public function update(Request $request, string $attachmentId)
     {
-        $attachment = $this->attachment->newQuery()->findOrFail($attachmentId);
-
+        /** @var Attachment $attachment */
+        $attachment = Attachment::query()->findOrFail($attachmentId);
         try {
             $this->validate($request, [
                 'attachment_edit_name' => 'required|string|min:1|max:255',
@@ -160,7 +158,7 @@ class AttachmentController extends Controller
 
         $attachmentName = $request->get('attachment_link_name');
         $link = $request->get('attachment_link_url');
-        $attachment = $this->attachmentService->saveNewFromLink($attachmentName, $link, intval($pageId));
+        $this->attachmentService->saveNewFromLink($attachmentName, $link, intval($pageId));
 
         return view('attachments.manager-link-form', [
             'pageId' => $pageId,
@@ -202,9 +200,10 @@ class AttachmentController extends Controller
      * @throws FileNotFoundException
      * @throws NotFoundException
      */
-    public function get(string $attachmentId)
+    public function get(Request $request, string $attachmentId)
     {
-        $attachment = $this->attachment->findOrFail($attachmentId);
+        /** @var Attachment $attachment */
+        $attachment = Attachment::query()->findOrFail($attachmentId);
         try {
             $page = $this->pageRepo->getById($attachment->uploaded_to);
         } catch (NotFoundException $exception) {
@@ -217,8 +216,13 @@ class AttachmentController extends Controller
             return redirect($attachment->path);
         }
 
+        $fileName = $attachment->getFileName();
         $attachmentContents = $this->attachmentService->getAttachmentFromStorage($attachment);
-        return $this->downloadResponse($attachmentContents, $attachment->getFileName());
+
+        if ($request->get('open') === 'true') {
+            return $this->inlineDownloadResponse($attachmentContents, $fileName);
+        }
+        return $this->downloadResponse($attachmentContents, $fileName);
     }
 
     /**
@@ -227,7 +231,8 @@ class AttachmentController extends Controller
      */
     public function delete(string $attachmentId)
     {
-        $attachment = $this->attachment->findOrFail($attachmentId);
+        /** @var Attachment $attachment */
+        $attachment = Attachment::query()->findOrFail($attachmentId);
         $this->checkOwnablePermission('attachment-delete', $attachment);
         $this->attachmentService->deleteFile($attachment);
         return response()->json(['message' => trans('entities.attachments_deleted')]);

app/Http/Controllers/AuditLogController.php

@@ -20,6 +20,7 @@ class AuditLogController extends Controller
             'sort' => $request->get('sort', 'created_at'),
             'date_from' => $request->get('date_from', ''),
             'date_to' => $request->get('date_to', ''),
+            'user' => $request->get('user', ''),
         ];
 
         $query = Activity::query()
@@ -34,6 +35,9 @@ class AuditLogController extends Controller
         if ($listDetails['event']) {
             $query->where('type', '=', $listDetails['event']);
         }
+        if ($listDetails['user']) {
+            $query->where('user_id', '=', $listDetails['user']);
+        }
 
         if ($listDetails['date_from']) {
             $query->where('created_at', '>=', $listDetails['date_from']);

app/Http/Controllers/Auth/ConfirmEmailController.php

@@ -2,12 +2,15 @@
 
 namespace BookStack\Http\Controllers\Auth;
 
+use BookStack\Actions\ActivityType;
 use BookStack\Auth\Access\EmailConfirmationService;
 use BookStack\Auth\UserRepo;
 use BookStack\Exceptions\ConfirmationEmailException;
 use BookStack\Exceptions\UserTokenExpiredException;
 use BookStack\Exceptions\UserTokenNotFoundException;
+use BookStack\Facades\Theme;
 use BookStack\Http\Controllers\Controller;
+use BookStack\Theming\ThemeEvents;
 use Exception;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
@@ -80,6 +83,8 @@ class ConfirmEmailController extends Controller
         $user->save();
 
         auth()->login($user);
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, auth()->getDefaultDriver(), $user);
+        $this->logActivity(ActivityType::AUTH_LOGIN, $user);
         $this->showSuccessNotification(trans('auth.email_confirm_success'));
         $this->emailConfirmationService->deleteByUser($user);
 

app/Http/Controllers/Auth/LoginController.php

@@ -7,9 +7,12 @@ use BookStack\Actions\ActivityType;
 use BookStack\Auth\Access\SocialAuthService;
 use BookStack\Exceptions\LoginAttemptEmailNeededException;
 use BookStack\Exceptions\LoginAttemptException;
+use BookStack\Facades\Theme;
 use BookStack\Http\Controllers\Controller;
+use BookStack\Theming\ThemeEvents;
 use Illuminate\Foundation\Auth\AuthenticatesUsers;
 use Illuminate\Http\Request;
+use Illuminate\Validation\ValidationException;
 
 class LoginController extends Controller
 {
@@ -150,6 +153,7 @@ class LoginController extends Controller
             }
         }
 
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, auth()->getDefaultDriver(), $user);
         $this->logActivity(ActivityType::AUTH_LOGIN, $user);
         return redirect()->intended($this->redirectPath());
     }
@@ -196,4 +200,18 @@ class LoginController extends Controller
         return redirect('/login');
     }
 
+    /**
+     * Get the failed login response instance.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return \Symfony\Component\HttpFoundation\Response
+     *
+     * @throws \Illuminate\Validation\ValidationException
+     */
+    protected function sendFailedLoginResponse(Request $request)
+    {
+        throw ValidationException::withMessages([
+            $this->username() => [trans('auth.failed')],
+        ])->redirectTo('/login');
+    }
 }

app/Http/Controllers/Auth/RegisterController.php

@@ -2,11 +2,14 @@
 
 namespace BookStack\Http\Controllers\Auth;
 
+use BookStack\Actions\ActivityType;
 use BookStack\Auth\Access\RegistrationService;
 use BookStack\Auth\Access\SocialAuthService;
 use BookStack\Auth\User;
 use BookStack\Exceptions\UserRegistrationException;
+use BookStack\Facades\Theme;
 use BookStack\Http\Controllers\Controller;
+use BookStack\Theming\ThemeEvents;
 use Illuminate\Foundation\Auth\RegistersUsers;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Hash;
@@ -93,6 +96,8 @@ class RegisterController extends Controller
         try {
             $user = $this->registrationService->registerUser($userData);
             auth()->login($user);
+            Theme::dispatch(ThemeEvents::AUTH_LOGIN, auth()->getDefaultDriver(), $user);
+            $this->logActivity(ActivityType::AUTH_LOGIN, $user);
         } catch (UserRegistrationException $exception) {
             if ($exception->getMessage()) {
                 $this->showErrorNotification($exception->getMessage());
@@ -117,5 +122,4 @@ class RegisterController extends Controller
             'password' => Hash::make($data['password']),
         ]);
     }
-
 }

app/Http/Controllers/Auth/Saml2Controller.php

@@ -82,5 +82,4 @@ class Saml2Controller extends Controller
 
         return redirect()->intended();
     }
-
 }

app/Http/Controllers/Auth/SocialController.php

@@ -2,16 +2,17 @@
 
 namespace BookStack\Http\Controllers\Auth;
 
+use BookStack\Actions\ActivityType;
 use BookStack\Auth\Access\RegistrationService;
 use BookStack\Auth\Access\SocialAuthService;
 use BookStack\Exceptions\SocialDriverNotConfigured;
 use BookStack\Exceptions\SocialSignInAccountNotUsed;
 use BookStack\Exceptions\SocialSignInException;
 use BookStack\Exceptions\UserRegistrationException;
+use BookStack\Facades\Theme;
 use BookStack\Http\Controllers\Controller;
-use Illuminate\Http\RedirectResponse;
+use BookStack\Theming\ThemeEvents;
 use Illuminate\Http\Request;
-use Illuminate\Routing\Redirector;
 use Illuminate\Support\Str;
 use Laravel\Socialite\Contracts\User as SocialUser;
 
@@ -31,12 +32,11 @@ class SocialController extends Controller
         $this->registrationService = $registrationService;
     }
 
-
     /**
      * Redirect to the relevant social site.
-     * @throws \BookStack\Exceptions\SocialDriverNotConfigured
+     * @throws SocialDriverNotConfigured
      */
-    public function getSocialLogin(string $socialDriver)
+    public function login(string $socialDriver)
     {
         session()->put('social-callback', 'login');
         return $this->socialAuthService->startLogIn($socialDriver);
@@ -47,7 +47,7 @@ class SocialController extends Controller
      * @throws SocialDriverNotConfigured
      * @throws UserRegistrationException
      */
-    public function socialRegister(string $socialDriver)
+    public function register(string $socialDriver)
     {
         $this->registrationService->ensureRegistrationAllowed();
         session()->put('social-callback', 'register');
@@ -60,7 +60,7 @@ class SocialController extends Controller
      * @throws SocialDriverNotConfigured
      * @throws UserRegistrationException
      */
-    public function socialCallback(Request $request, string $socialDriver)
+    public function callback(Request $request, string $socialDriver)
     {
         if (!session()->has('social-callback')) {
             throw new SocialSignInException(trans('errors.social_no_action_defined'), '/login');
@@ -99,7 +99,7 @@ class SocialController extends Controller
     /**
      * Detach a social account from a user.
      */
-    public function detachSocialAccount(string $socialDriver)
+    public function detach(string $socialDriver)
     {
         $this->socialAuthService->detachSocialAccount($socialDriver);
         session()->flash('success', trans('settings.users_social_disconnected', ['socialAccount' => Str::title($socialDriver)]));
@@ -113,7 +113,7 @@ class SocialController extends Controller
     protected function socialRegisterCallback(string $socialDriver, SocialUser $socialUser)
     {
         $socialUser = $this->socialAuthService->handleRegistrationCallback($socialDriver, $socialUser);
-        $socialAccount = $this->socialAuthService->fillSocialAccount($socialDriver, $socialUser);
+        $socialAccount = $this->socialAuthService->newSocialAccount($socialDriver, $socialUser);
         $emailVerified = $this->socialAuthService->driverAutoConfirmEmailEnabled($socialDriver);
 
         // Create an array of the user data to create a new user instance
@@ -130,6 +130,8 @@ class SocialController extends Controller
 
         $user = $this->registrationService->registerUser($userData, $socialAccount, $emailVerified);
         auth()->login($user);
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, $socialDriver, $user);
+        $this->logActivity(ActivityType::AUTH_LOGIN, $user);
 
         $this->showSuccessNotification(trans('auth.register_success'));
         return redirect('/');

app/Http/Controllers/Auth/UserInviteController.php

@@ -2,11 +2,14 @@
 
 namespace BookStack\Http\Controllers\Auth;
 
+use BookStack\Actions\ActivityType;
 use BookStack\Auth\Access\UserInviteService;
 use BookStack\Auth\UserRepo;
 use BookStack\Exceptions\UserTokenExpiredException;
 use BookStack\Exceptions\UserTokenNotFoundException;
+use BookStack\Facades\Theme;
 use BookStack\Http\Controllers\Controller;
+use BookStack\Theming\ThemeEvents;
 use Exception;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
@@ -68,6 +71,8 @@ class UserInviteController extends Controller
         $user->save();
 
         auth()->login($user);
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, auth()->getDefaultDriver(), $user);
+        $this->logActivity(ActivityType::AUTH_LOGIN, $user);
         $this->showSuccessNotification(trans('auth.user_invite_success', ['appName' => setting('app-name')]));
         $this->inviteService->deleteByUser($user);
 

app/Http/Controllers/BookController.php

@@ -2,6 +2,7 @@
 
 use Activity;
 use BookStack\Actions\ActivityType;
+use BookStack\Actions\View;
 use BookStack\Entities\Tools\BookContents;
 use BookStack\Entities\Models\Bookshelf;
 use BookStack\Entities\Tools\PermissionsUpdater;
@@ -11,7 +12,6 @@ use BookStack\Exceptions\ImageUploadException;
 use Illuminate\Http\Request;
 use Illuminate\Validation\ValidationException;
 use Throwable;
-use Views;
 
 class BookController extends Controller
 {
@@ -30,7 +30,7 @@ class BookController extends Controller
      */
     public function index()
     {
-        $view = setting()->getForCurrentUser('books_view_type', config('app.views.books'));
+        $view = setting()->getForCurrentUser('books_view_type');
         $sort = setting()->getForCurrentUser('books_sort', 'name');
         $order = setting()->getForCurrentUser('books_sort_order', 'asc');
 
@@ -112,7 +112,7 @@ class BookController extends Controller
         $bookChildren = (new BookContents($book))->getTree(true);
         $bookParentShelves = $book->shelves()->visible()->get();
 
-        Views::add($book);
+        View::incrementFor($book);
         if ($request->has('shelf')) {
             $this->entityContextManager->setShelfContext(intval($request->get('shelf')));
         }

app/Http/Controllers/BookshelfController.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Http\Controllers;
 
 use Activity;
+use BookStack\Actions\View;
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Tools\PermissionsUpdater;
 use BookStack\Entities\Tools\ShelfContext;
@@ -32,7 +33,7 @@ class BookshelfController extends Controller
      */
     public function index()
     {
-        $view = setting()->getForCurrentUser('bookshelves_view_type', config('app.views.bookshelves', 'grid'));
+        $view = setting()->getForCurrentUser('bookshelves_view_type');
         $sort = setting()->getForCurrentUser('bookshelves_sort', 'name');
         $order = setting()->getForCurrentUser('bookshelves_sort_order', 'asc');
         $sortOptions = [
@@ -101,15 +102,26 @@ class BookshelfController extends Controller
         $shelf = $this->bookshelfRepo->getBySlug($slug);
         $this->checkOwnablePermission('book-view', $shelf);
 
-        Views::add($shelf);
+        $sort = setting()->getForCurrentUser('shelf_books_sort', 'default');
+        $order = setting()->getForCurrentUser('shelf_books_sort_order', 'asc');
+
+        $sortedVisibleShelfBooks = $shelf->visibleBooks()->get()
+            ->sortBy($sort === 'default' ? 'pivot.order' : $sort, SORT_REGULAR, $order === 'desc')
+            ->values()
+            ->all();
+
+        View::incrementFor($shelf);
         $this->entityContextManager->setShelfContext($shelf->id);
-        $view = setting()->getForCurrentUser('bookshelf_view_type', config('app.views.books'));
+        $view = setting()->getForCurrentUser('bookshelf_view_type');
 
         $this->setPageTitle($shelf->getShortName());
         return view('shelves.show', [
             'shelf' => $shelf,
+            'sortedVisibleShelfBooks' => $sortedVisibleShelfBooks,
             'view' => $view,
-            'activity' => Activity::entityActivity($shelf, 20, 1)
+            'activity' => Activity::entityActivity($shelf, 20, 1),
+            'order' => $order,
+            'sort' => $sort
         ]);
     }
 

app/Http/Controllers/ChapterController.php

@@ -1,15 +1,16 @@
 <?php namespace BookStack\Http\Controllers;
 
+use BookStack\Actions\View;
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Tools\BookContents;
 use BookStack\Entities\Repos\ChapterRepo;
+use BookStack\Entities\Tools\NextPreviousContentLocator;
 use BookStack\Entities\Tools\PermissionsUpdater;
 use BookStack\Exceptions\MoveOperationException;
 use BookStack\Exceptions\NotFoundException;
 use Illuminate\Http\Request;
 use Illuminate\Validation\ValidationException;
 use Throwable;
-use Views;
 
 class ChapterController extends Controller
 {
@@ -64,7 +65,8 @@ class ChapterController extends Controller
 
         $sidebarTree = (new BookContents($chapter->book))->getTree();
         $pages = $chapter->getVisiblePages();
-        Views::add($chapter);
+        $nextPreviousLocator = new NextPreviousContentLocator($chapter, $sidebarTree);
+        View::incrementFor($chapter);
 
         $this->setPageTitle($chapter->getShortName());
         return view('chapters.show', [
@@ -72,7 +74,9 @@ class ChapterController extends Controller
             'chapter' => $chapter,
             'current' => $chapter,
             'sidebarTree' => $sidebarTree,
-            'pages' => $pages
+            'pages' => $pages,
+            'next' => $nextPreviousLocator->getNext(),
+            'previous' => $nextPreviousLocator->getPrevious(),
         ]);
     }
 

app/Http/Controllers/Controller.php

@@ -6,6 +6,7 @@ use BookStack\Facades\Activity;
 use BookStack\Interfaces\Loggable;
 use BookStack\HasCreatorAndUpdater;
 use BookStack\Model;
+use finfo;
 use Illuminate\Foundation\Bus\DispatchesJobs;
 use Illuminate\Foundation\Validation\ValidatesRequests;
 use Illuminate\Http\Exceptions\HttpResponseException;
@@ -121,6 +122,20 @@ abstract class Controller extends BaseController
         ]);
     }
 
+    /**
+     * Create a file download response that provides the file with a content-type
+     * correct for the file, in a way so the browser can show the content in browser.
+     */
+    protected function inlineDownloadResponse(string $content, string $fileName): Response
+    {
+        $finfo = new finfo(FILEINFO_MIME_TYPE);
+        $mime = $finfo->buffer($content) ?: 'application/octet-stream';
+        return response()->make($content, 200, [
+            'Content-Type'        => $mime,
+            'Content-Disposition' => 'inline; filename="' . $fileName . '"'
+        ]);
+    }
+
     /**
      * Show a positive, successful notification to the user on next view load.
      */
@@ -159,6 +174,6 @@ abstract class Controller extends BaseController
      */
     protected function getImageValidationRules(): string
     {
-        return 'image_extension|no_double_extension|mimes:jpeg,png,gif,webp';
+        return 'image_extension|mimes:jpeg,png,gif,webp';
     }
 }

app/Http/Controllers/FavouriteController.php

@@ -0,0 +1,95 @@
+<?php
+
+namespace BookStack\Http\Controllers;
+
+use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Queries\TopFavourites;
+use BookStack\Interfaces\Favouritable;
+use BookStack\Model;
+use Illuminate\Http\Request;
+
+class FavouriteController extends Controller
+{
+    /**
+     * Show a listing of all favourite items for the current user.
+     */
+    public function index(Request $request)
+    {
+        $viewCount = 20;
+        $page = intval($request->get('page', 1));
+        $favourites = (new TopFavourites)->run($viewCount + 1, (($page - 1) * $viewCount));
+
+        $hasMoreLink = ($favourites->count() > $viewCount) ? url("/favourites?page=" . ($page+1)) : null;
+
+        return view('common.detailed-listing-with-more', [
+            'title' => trans('entities.my_favourites'),
+            'entities' => $favourites->slice(0, $viewCount),
+            'hasMoreLink' => $hasMoreLink,
+        ]);
+    }
+
+    /**
+     * Add a new item as a favourite.
+     */
+    public function add(Request $request)
+    {
+        $favouritable = $this->getValidatedModelFromRequest($request);
+        $favouritable->favourites()->firstOrCreate([
+            'user_id' => user()->id,
+        ]);
+
+        $this->showSuccessNotification(trans('activities.favourite_add_notification', [
+            'name' => $favouritable->name,
+        ]));
+        return redirect()->back();
+    }
+
+    /**
+     * Remove an item as a favourite.
+     */
+    public function remove(Request $request)
+    {
+        $favouritable = $this->getValidatedModelFromRequest($request);
+        $favouritable->favourites()->where([
+            'user_id' => user()->id,
+        ])->delete();
+
+        $this->showSuccessNotification(trans('activities.favourite_remove_notification', [
+            'name' => $favouritable->name,
+        ]));
+        return redirect()->back();
+    }
+
+    /**
+     * @throws \Illuminate\Validation\ValidationException
+     * @throws \Exception
+     */
+    protected function getValidatedModelFromRequest(Request $request): Favouritable
+    {
+        $modelInfo = $this->validate($request, [
+            'type' => 'required|string',
+            'id' => 'required|integer',
+        ]);
+
+        if (!class_exists($modelInfo['type'])) {
+            throw new \Exception('Model not found');
+        }
+
+        /** @var Model $model */
+        $model = new $modelInfo['type'];
+        if (! $model instanceof Favouritable) {
+            throw new \Exception('Model not favouritable');
+        }
+
+        $modelInstance = $model->newQuery()
+            ->where('id', '=', $modelInfo['id'])
+            ->first(['id', 'name']);
+
+        $inaccessibleEntity = ($modelInstance instanceof Entity && !userCan('view', $modelInstance));
+        if (is_null($modelInstance) || $inaccessibleEntity) {
+            throw new \Exception('Model instance not found');
+        }
+
+        return $modelInstance;
+    }
+}

app/Http/Controllers/HomeController.php

@@ -2,11 +2,12 @@
 
 use Activity;
 use BookStack\Entities\Models\Book;
+use BookStack\Entities\Queries\RecentlyViewed;
+use BookStack\Entities\Queries\TopFavourites;
 use BookStack\Entities\Tools\PageContent;
 use BookStack\Entities\Models\Page;
 use BookStack\Entities\Repos\BookRepo;
 use BookStack\Entities\Repos\BookshelfRepo;
-use Illuminate\Http\Response;
 use Views;
 
 class HomeController extends Controller
@@ -32,12 +33,13 @@ class HomeController extends Controller
 
         $recentFactor = count($draftPages) > 0 ? 0.5 : 1;
         $recents = $this->isSignedIn() ?
-              Views::getUserRecentlyViewed(12*$recentFactor, 1)
+            (new RecentlyViewed)->run(12*$recentFactor, 1)
             : Book::visible()->orderBy('created_at', 'desc')->take(12 * $recentFactor)->get();
+        $favourites = (new TopFavourites)->run(6);
         $recentlyUpdatedPages = Page::visible()->with('book')
             ->where('draft', false)
             ->orderBy('updated_at', 'desc')
-            ->take(12)
+            ->take($favourites->count() > 0 ? 6 : 12)
             ->get();
 
         $homepageOptions = ['default', 'books', 'bookshelves', 'page'];
@@ -51,12 +53,13 @@ class HomeController extends Controller
             'recents' => $recents,
             'recentlyUpdatedPages' => $recentlyUpdatedPages,
             'draftPages' => $draftPages,
+            'favourites' => $favourites,
         ];
 
         // Add required list ordering & sorting for books & shelves views.
         if ($homepageOption === 'bookshelves' || $homepageOption === 'books') {
             $key = $homepageOption;
-            $view = setting()->getForCurrentUser($key . '_view_type', config('app.views.' . $key));
+            $view = setting()->getForCurrentUser($key . '_view_type');
             $sort = setting()->getForCurrentUser($key . '_sort', 'name');
             $order = setting()->getForCurrentUser($key . '_sort_order', 'asc');
 
@@ -105,20 +108,21 @@ class HomeController extends Controller
      */
     public function customHeadContent()
     {
-        return view('partials.custom-head-content');
+        return view('partials.custom-head');
     }
 
     /**
      * Show the view for /robots.txt
-     * @return $this
      */
     public function getRobots()
     {
         $sitePublic = setting('app-public', false);
         $allowRobots = config('app.allow_robots');
+
         if ($allowRobots === null) {
             $allowRobots = $sitePublic;
         }
+
         return response()
             ->view('common.robots', ['allowRobots' => $allowRobots])
             ->header('Content-Type', 'text/plain');

app/Http/Controllers/Images/ImageController.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Http\Controllers\Images;
 
 use BookStack\Exceptions\ImageUploadException;
+use BookStack\Exceptions\NotFoundException;
 use BookStack\Http\Controllers\Controller;
 use BookStack\Uploads\Image;
 use BookStack\Uploads\ImageRepo;
@@ -27,12 +28,15 @@ class ImageController extends Controller
 
     /**
      * Provide an image file from storage.
+     * @throws NotFoundException
      */
     public function showImage(string $path)
     {
         $path = storage_path('uploads/images/' . $path);
         if (!file_exists($path)) {
-            abort(404);
+            throw (new NotFoundException(trans('errors.image_not_found')))
+                ->setSubtitle(trans('errors.image_not_found_subtitle'))
+                ->setDetails(trans('errors.image_not_found_details'));
         }
 
         return response()->file($path);

app/Http/Controllers/PageController.php

@@ -1,19 +1,19 @@
 <?php namespace BookStack\Http\Controllers;
 
+use BookStack\Actions\View;
 use BookStack\Entities\Tools\BookContents;
+use BookStack\Entities\Tools\NextPreviousContentLocator;
 use BookStack\Entities\Tools\PageContent;
 use BookStack\Entities\Tools\PageEditActivity;
 use BookStack\Entities\Models\Page;
 use BookStack\Entities\Repos\PageRepo;
 use BookStack\Entities\Tools\PermissionsUpdater;
 use BookStack\Exceptions\NotFoundException;
-use BookStack\Exceptions\NotifyException;
 use BookStack\Exceptions\PermissionsException;
 use Exception;
 use Illuminate\Http\Request;
 use Illuminate\Validation\ValidationException;
 use Throwable;
-use Views;
 
 class PageController extends Controller
 {
@@ -142,7 +142,9 @@ class PageController extends Controller
             $page->load(['comments.createdBy']);
         }
 
-        Views::add($page);
+        $nextPreviousLocator = new NextPreviousContentLocator($page, $sidebarTree);
+
+        View::incrementFor($page);
         $this->setPageTitle($page->getShortName());
         return view('pages.show', [
             'page' => $page,
@@ -150,7 +152,9 @@ class PageController extends Controller
             'current' => $page,
             'sidebarTree' => $sidebarTree,
             'commentsEnabled' => $commentsEnabled,
-            'pageNav' => $pageNav
+            'pageNav' => $pageNav,
+            'next' => $nextPreviousLocator->getNext(),
+            'previous' => $nextPreviousLocator->getPrevious(),
         ]);
     }
 
@@ -243,8 +247,8 @@ class PageController extends Controller
 
         $updateTime = $draft->updated_at->timestamp;
         return response()->json([
-            'status'    => 'success',
-            'message'   => trans('entities.pages_edit_draft_save_at'),
+            'status' => 'success',
+            'message' => trans('entities.pages_edit_draft_save_at'),
             'timestamp' => $updateTime
         ]);
     }
@@ -267,7 +271,7 @@ class PageController extends Controller
     {
         $page = $this->pageRepo->getBySlug($bookSlug, $pageSlug);
         $this->checkOwnablePermission('page-delete', $page);
-        $this->setPageTitle(trans('entities.pages_delete_named', ['pageName'=>$page->getShortName()]));
+        $this->setPageTitle(trans('entities.pages_delete_named', ['pageName' => $page->getShortName()]));
         return view('pages.delete', [
             'book' => $page->book,
             'page' => $page,
@@ -283,7 +287,7 @@ class PageController extends Controller
     {
         $page = $this->pageRepo->getById($pageId);
         $this->checkOwnablePermission('page-update', $page);
-        $this->setPageTitle(trans('entities.pages_delete_draft_named', ['pageName'=>$page->getShortName()]));
+        $this->setPageTitle(trans('entities.pages_delete_draft_named', ['pageName' => $page->getShortName()]));
         return view('pages.delete', [
             'book' => $page->book,
             'page' => $page,
@@ -295,7 +299,6 @@ class PageController extends Controller
      * Remove the specified page from storage.
      * @throws NotFoundException
      * @throws Throwable
-     * @throws NotifyException
      */
     public function destroy(string $bookSlug, string $pageSlug)
     {
@@ -311,7 +314,6 @@ class PageController extends Controller
     /**
      * Remove the specified draft page from storage.
      * @throws NotFoundException
-     * @throws NotifyException
      * @throws Throwable
      */
     public function destroyDraft(string $bookSlug, int $pageId)
@@ -340,9 +342,9 @@ class PageController extends Controller
             ->paginate(20)
             ->setPath(url('/pages/recently-updated'));
 
-        return view('pages.detailed-listing', [
+        return view('common.detailed-listing-paginated', [
             'title' => trans('entities.recently_updated_pages'),
-            'pages' => $pages
+            'entities' => $pages
         ]);
     }
 
@@ -380,7 +382,7 @@ class PageController extends Controller
         try {
             $parent = $this->pageRepo->move($page, $entitySelection);
         } catch (Exception $exception) {
-            if ($exception instanceof  PermissionsException) {
+            if ($exception instanceof PermissionsException) {
                 $this->showPermissionError();
             }
 
@@ -424,7 +426,7 @@ class PageController extends Controller
         try {
             $pageCopy = $this->pageRepo->copy($page, $entitySelection, $newName);
         } catch (Exception $exception) {
-            if ($exception instanceof  PermissionsException) {
+            if ($exception instanceof PermissionsException) {
                 $this->showPermissionError();
             }
 
@@ -445,7 +447,7 @@ class PageController extends Controller
         $page = $this->pageRepo->getBySlug($bookSlug, $pageSlug);
         $this->checkOwnablePermission('restrictions-manage', $page);
         return view('pages.permissions', [
-            'page'  => $page,
+            'page' => $page,
         ]);
     }
 

app/Http/Controllers/SearchController.php

@@ -1,9 +1,6 @@
 <?php namespace BookStack\Http\Controllers;
 
-use BookStack\Actions\ViewService;
-use BookStack\Entities\Models\Book;
-use BookStack\Entities\Models\Bookshelf;
-use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Queries\Popular;
 use BookStack\Entities\Tools\SearchRunner;
 use BookStack\Entities\Tools\ShelfContext;
 use BookStack\Entities\Tools\SearchOptions;
@@ -12,16 +9,13 @@ use Illuminate\Http\Request;
 
 class SearchController extends Controller
 {
-    protected $viewService;
     protected $searchRunner;
     protected $entityContextManager;
 
     public function __construct(
-        ViewService $viewService,
         SearchRunner $searchRunner,
         ShelfContext $entityContextManager
     ) {
-        $this->viewService = $viewService;
         $this->searchRunner = $searchRunner;
         $this->entityContextManager = $entityContextManager;
     }
@@ -85,7 +79,7 @@ class SearchController extends Controller
             $searchTerm .= ' {type:'. implode('|', $entityTypes) .'}';
             $entities = $this->searchRunner->searchEntities(SearchOptions::fromString($searchTerm), 'all', 1, 20, $permission)['results'];
         } else {
-            $entities = $this->viewService->getPopular(20, 0, $entityTypes, $permission);
+            $entities = (new Popular)->run(20, 0, $entityTypes, $permission);
         }
 
         return view('search.entity-ajax-list', ['entities' => $entities]);

app/Http/Controllers/StatusController.php

@@ -0,0 +1,47 @@
+<?php namespace BookStack\Http\Controllers;
+
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Session;
+use Illuminate\Support\Str;
+
+class StatusController extends Controller
+{
+
+    /**
+     * Show the system status as a simple json page.
+     */
+    public function show()
+    {
+        $statuses = [
+            'database' => $this->trueWithoutError(function () {
+                return DB::table('migrations')->count() > 0;
+            }),
+            'cache' => $this->trueWithoutError(function () {
+                $rand = Str::random();
+                Cache::set('status_test', $rand);
+                return Cache::get('status_test') === $rand;
+            }),
+            'session' => $this->trueWithoutError(function () {
+                $rand = Str::random();
+                Session::put('status_test', $rand);
+                return Session::get('status_test') === $rand;
+            }),
+        ];
+
+        $hasError = in_array(false, $statuses);
+        return response()->json($statuses, $hasError ? 500 : 200);
+    }
+
+    /**
+     * Check the callable passed returns true and does not throw an exception.
+     */
+    protected function trueWithoutError(callable $test): bool
+    {
+        try {
+            return $test() === true;
+        } catch (\Exception $e) {
+            return false;
+        }
+    }
+}

app/Http/Controllers/UserApiTokenController.php

@@ -140,5 +140,4 @@ class UserApiTokenController extends Controller
         $token = ApiToken::query()->where('user_id', '=', $user->id)->where('id', '=', $tokenId)->firstOrFail();
         return [$user, $token];
     }
-
 }

app/Http/Controllers/UserController.php

@@ -5,10 +5,13 @@ use BookStack\Auth\Access\SocialAuthService;
 use BookStack\Auth\Access\UserInviteService;
 use BookStack\Auth\User;
 use BookStack\Auth\UserRepo;
+use BookStack\Exceptions\ImageUploadException;
 use BookStack\Exceptions\UserUpdateException;
 use BookStack\Uploads\ImageRepo;
+use Exception;
 use Illuminate\Http\Request;
 use Illuminate\Support\Str;
+use Illuminate\Validation\ValidationException;
 
 class UserController extends Controller
 {
@@ -61,7 +64,7 @@ class UserController extends Controller
     /**
      * Store a newly created user in storage.
      * @throws UserUpdateException
-     * @throws \Illuminate\Validation\ValidationException
+     * @throws ValidationException
      */
     public function store(Request $request)
     {
@@ -90,6 +93,7 @@ class UserController extends Controller
             $user->external_auth_id = $request->get('external_auth_id');
         }
 
+        $user->refreshSlug();
         $user->save();
 
         if ($sendInvite) {
@@ -132,8 +136,8 @@ class UserController extends Controller
     /**
      * Update the specified user in storage.
      * @throws UserUpdateException
-     * @throws \BookStack\Exceptions\ImageUploadException
-     * @throws \Illuminate\Validation\ValidationException
+     * @throws ImageUploadException
+     * @throws ValidationException
      */
     public function update(Request $request, int $id)
     {
@@ -157,6 +161,11 @@ class UserController extends Controller
             $user->email = $request->get('email');
         }
 
+        // Refresh the slug if the user's name has changed
+        if ($user->isDirty('name')) {
+            $user->refreshSlug();
+        }
+
         // Role updates
         if (userCan('users-manage') && $request->filled('roles')) {
             $roles = $request->get('roles');
@@ -216,7 +225,7 @@ class UserController extends Controller
 
     /**
      * Remove the specified user from storage.
-     * @throws \Exception
+     * @throws Exception
      */
     public function destroy(Request $request, int $id)
     {
@@ -243,25 +252,6 @@ class UserController extends Controller
         return redirect('/settings/users');
     }
 
-    /**
-     * Show the user profile page
-     */
-    public function showProfilePage($id)
-    {
-        $user = $this->userRepo->getById($id);
-
-        $userActivity = $this->userRepo->getActivity($user);
-        $recentlyCreated = $this->userRepo->getRecentlyCreated($user, 5);
-        $assetCounts = $this->userRepo->getAssetCounts($user);
-
-        return view('users.profile', [
-            'user' => $user,
-            'activity' => $userActivity,
-            'recentlyCreated' => $recentlyCreated,
-            'assetCounts' => $assetCounts
-        ]);
-    }
-
     /**
      * Update the user's preferred book-list display setting.
      */
@@ -310,7 +300,7 @@ class UserController extends Controller
      */
     public function changeSort(Request $request, string $id, string $type)
     {
-        $validSortTypes = ['books', 'bookshelves'];
+        $validSortTypes = ['books', 'bookshelves', 'shelf_books'];
         if (!in_array($type, $validSortTypes)) {
             return redirect()->back(500);
         }
@@ -353,7 +343,7 @@ class UserController extends Controller
         $this->checkPermissionOrCurrentUser('users-manage', $userId);
 
         $sort = $request->get('sort');
-        if (!in_array($sort, ['name', 'created_at', 'updated_at'])) {
+        if (!in_array($sort, ['name', 'created_at', 'updated_at', 'default'])) {
             $sort = 'name';
         }
 

app/Http/Controllers/UserProfileController.php

@@ -0,0 +1,25 @@
+<?php namespace BookStack\Http\Controllers;
+
+use BookStack\Auth\UserRepo;
+
+class UserProfileController extends Controller
+{
+    /**
+     * Show the user profile page
+     */
+    public function show(UserRepo $repo, string $slug)
+    {
+        $user = $repo->getBySlug($slug);
+
+        $userActivity = $repo->getActivity($user);
+        $recentlyCreated = $repo->getRecentlyCreated($user, 5);
+        $assetCounts = $repo->getAssetCounts($user);
+
+        return view('users.profile', [
+            'user' => $user,
+            'activity' => $userActivity,
+            'recentlyCreated' => $recentlyCreated,
+            'assetCounts' => $assetCounts
+        ]);
+    }
+}

app/Http/Kernel.php

@@ -28,8 +28,8 @@ class Kernel extends HttpKernel
             \Illuminate\Session\Middleware\StartSession::class,
             \Illuminate\View\Middleware\ShareErrorsFromSession::class,
             \BookStack\Http\Middleware\VerifyCsrfToken::class,
+            \BookStack\Http\Middleware\RunThemeActions::class,
             \BookStack\Http\Middleware\Localization::class,
-            \BookStack\Http\Middleware\GlobalViewData::class,
         ],
         'api' => [
             \BookStack\Http\Middleware\ThrottleApiRequests::class,

app/Http/Middleware/ChecksForEmailConfirmation.php

@@ -33,4 +33,4 @@ trait ChecksForEmailConfirmation
 
         return false;
     }
-}
+}

app/Http/Middleware/GlobalViewData.php

@@ -1,27 +0,0 @@
-<?php namespace BookStack\Http\Middleware;
-
-use Closure;
-use Illuminate\Http\Request;
-
-/**
- * Class GlobalViewData
- * Sets up data that is accessible to any view rendered by the web routes.
- */
-class GlobalViewData
-{
-
-    /**
-     * Handle an incoming request.
-     *
-     * @param Request $request
-     * @param Closure $next
-     * @return mixed
-     */
-    public function handle(Request $request, Closure $next)
-    {
-        view()->share('signedIn', auth()->check());
-        view()->share('currentUser', user());
-
-        return $next($request);
-    }
-}

app/Http/Middleware/Localization.php

@@ -18,6 +18,8 @@ class Localization
     protected $localeMap = [
         'ar' => 'ar',
         'bg' => 'bg_BG',
+        'bs' => 'bs_BA',
+        'ca' => 'ca',
         'da' => 'da_DK',
         'de' => 'de_DE',
         'de_informal' => 'de_DE',
@@ -26,13 +28,16 @@ class Localization
         'es_AR' => 'es_AR',
         'fr' => 'fr_FR',
         'he' => 'he_IL',
+        'hr' => 'hr_HR',
+        'id' => 'id_ID',
         'it' => 'it_IT',
         'ja' => 'ja',
         'ko' => 'ko_KR',
+        'lv' => 'lv_LV',
         'nl' => 'nl_NL',
         'nb' => 'nb_NO',
         'pl' => 'pl_PL',
-        'pt' => 'pl_PT',
+        'pt' => 'pt_PT',
         'pt_BR' => 'pt_BR',
         'ru' => 'ru',
         'sk' => 'sk_SK',
@@ -57,12 +62,7 @@ class Localization
         $defaultLang = config('app.locale');
         config()->set('app.default_locale', $defaultLang);
 
-        if (user()->isDefault() && config('app.auto_detect_locale')) {
-            $locale = $this->autoDetectLocale($request, $defaultLang);
-        } else {
-            $locale = setting()->getUser(user(), 'language', $defaultLang);
-        }
-
+        $locale = $this->getUserLocale($request, $defaultLang);
         config()->set('app.lang', str_replace('_', '-', $this->getLocaleIso($locale)));
 
         // Set text direction
@@ -76,14 +76,29 @@ class Localization
         return $next($request);
     }
 
+    /**
+     * Get the locale specifically for the currently logged in user if available.
+     */
+    protected function getUserLocale(Request $request, string $default): string
+    {
+        try {
+            $user = user();
+        } catch (\Exception $exception) {
+            return $default;
+        }
+
+        if ($user->isDefault() && config('app.auto_detect_locale')) {
+            return $this->autoDetectLocale($request, $default);
+        }
+
+        return setting()->getUser($user, 'language', $default);
+    }
+
     /**
      * Autodetect the visitors locale by matching locales in their headers
      * against the locales supported by BookStack.
-     * @param Request $request
-     * @param string $default
-     * @return string
      */
-    protected function autoDetectLocale(Request $request, string $default)
+    protected function autoDetectLocale(Request $request, string $default): string
     {
         $availableLocales = config('app.locales');
         foreach ($request->getLanguages() as $lang) {
@@ -96,10 +111,8 @@ class Localization
 
     /**
      * Get the ISO version of a BookStack language name
-     * @param  string $locale
-     * @return string
      */
-    public function getLocaleIso(string $locale)
+    public function getLocaleIso(string $locale): string
     {
         return $this->localeMap[$locale] ?? $locale;
     }
@@ -107,7 +120,6 @@ class Localization
     /**
      * Set the system date locale for localized date formatting.
      * Will try both the standard locale name and the UTF8 variant.
-     * @param string $locale
      */
     protected function setSystemDateLocale(string $locale)
     {

app/Http/Middleware/RunThemeActions.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace BookStack\Http\Middleware;
+
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
+use Closure;
+
+class RunThemeActions
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        $earlyResponse = Theme::dispatch(ThemeEvents::WEB_MIDDLEWARE_BEFORE, $request);
+        if (!is_null($earlyResponse)) {
+            return $earlyResponse;
+        }
+
+        $response = $next($request);
+        $response = Theme::dispatch(ThemeEvents::WEB_MIDDLEWARE_AFTER, $request, $response) ?? $response;
+        return $response;
+    }
+}

app/Http/Middleware/ThrottleApiRequests.php

@@ -14,5 +14,4 @@ class ThrottleApiRequests extends Middleware
     {
         return (int) config('api.requests_per_minute');
     }
-
-}
+}

app/Interfaces/Favouritable.php

@@ -0,0 +1,11 @@
+<?php namespace BookStack\Interfaces;
+
+use Illuminate\Database\Eloquent\Relations\MorphMany;
+
+interface Favouritable
+{
+    /**
+     * Get the related favourite instances.
+     */
+    public function favourites(): MorphMany;
+}

app/Interfaces/Loggable.php

@@ -8,4 +8,4 @@ interface Loggable
      * Get the string descriptor for this item.
      */
     public function logDescriptor(): string;
-}
+}

app/Interfaces/Sluggable.php

@@ -0,0 +1,23 @@
+<?php namespace BookStack\Interfaces;
+
+use Illuminate\Database\Eloquent\Builder;
+
+/**
+ * Interface Sluggable
+ *
+ * Assigned to models that can have slugs.
+ * Must have the below properties.
+ *
+ * @property int $id
+ * @property string $name
+ * @method Builder newQuery
+ */
+interface Sluggable
+{
+
+    /**
+     * Regenerate the slug for this model.
+     */
+    public function refreshSlug(): string;
+
+}

app/Interfaces/Viewable.php

@@ -0,0 +1,11 @@
+<?php namespace BookStack\Interfaces;
+
+use Illuminate\Database\Eloquent\Relations\MorphMany;
+
+interface Viewable
+{
+    /**
+     * Get all view instances for this viewable model.
+     */
+    public function views(): MorphMany;
+}

app/Providers/AppServiceProvider.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Providers;
 
 use Blade;
+use BookStack\Auth\Access\SocialAuthService;
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Bookshelf;
 use BookStack\Entities\BreadcrumbsViewComposer;
@@ -8,9 +9,11 @@ use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Models\Page;
 use BookStack\Settings\Setting;
 use BookStack\Settings\SettingService;
+use Illuminate\Contracts\Cache\Repository;
 use Illuminate\Database\Eloquent\Relations\Relation;
 use Illuminate\Support\Facades\View;
 use Illuminate\Support\ServiceProvider;
+use Laravel\Socialite\Contracts\Factory as SocialiteFactory;
 use Schema;
 use URL;
 
@@ -59,7 +62,11 @@ class AppServiceProvider extends ServiceProvider
     public function register()
     {
         $this->app->singleton(SettingService::class, function ($app) {
-            return new SettingService($app->make(Setting::class), $app->make('Illuminate\Contracts\Cache\Repository'));
+            return new SettingService($app->make(Setting::class), $app->make(Repository::class));
+        });
+
+        $this->app->singleton(SocialAuthService::class, function($app) {
+            return new SocialAuthService($app->make(SocialiteFactory::class));
         });
     }
 }