Updated version and assets for release v21.11

Included test to cover case

.env.example.complete

@@ -232,6 +232,8 @@ SAML2_ONELOGIN_OVERRIDES=null
 SAML2_DUMP_USER_DETAILS=false
 SAML2_AUTOLOAD_METADATA=false
 SAML2_IDP_AUTHNCONTEXT=true
+SAML2_SP_x509=null
+SAML2_SP_x509_KEY=null
 
 # SAML group sync configuration
 # Refer to https://www.bookstackapp.com/docs/admin/saml2-auth/
@@ -239,6 +241,18 @@ SAML2_USER_TO_GROUPS=false
 SAML2_GROUP_ATTRIBUTE=group
 SAML2_REMOVE_FROM_GROUPS=false
 
+# OpenID Connect authentication configuration
+OIDC_NAME=SSO
+OIDC_DISPLAY_NAME_CLAIMS=name
+OIDC_CLIENT_ID=null
+OIDC_CLIENT_SECRET=null
+OIDC_ISSUER=null
+OIDC_ISSUER_DISCOVER=false
+OIDC_PUBLIC_KEY=null
+OIDC_AUTH_ENDPOINT=null
+OIDC_TOKEN_ENDPOINT=null
+OIDC_DUMP_USER_DETAILS=false
+
 # Disable default third-party services such as Gravatar and Draw.IO
 # Service-specific options will override this option
 DISABLE_EXTERNAL_SERVICES=false
@@ -279,6 +293,10 @@ REVISION_LIMIT=50
 # Set to -1 for unlimited recycle bin lifetime.
 RECYCLE_BIN_LIFETIME=30
 
+# File Upload Limit
+# Maximum file size, in megabytes, that can be uploaded to the system.
+FILE_UPLOAD_SIZE_LIMIT=50
+
 # Allow <script> tags in page content
 # Note, if set to 'true' the page editor may still escape scripts.
 ALLOW_CONTENT_SCRIPTS=false

.github/ISSUE_TEMPLATE/api_request.md

@@ -1,17 +0,0 @@
----
-name: New API Endpoint or Feature
-about: Request a new endpoint or API feature be added
-labels: ":nut_and_bolt: API Request"
----
-
-#### API Endpoint or Feature
-
-Clearly describe what you'd like to have added to the API. 
-
-#### Use-Case
-
-Explain the use-case that you're working-on that requires the above request.
-
-#### Additional Context
-
-If required, add any other context about the feature request here.

.github/ISSUE_TEMPLATE/api_request.yml

@@ -0,0 +1,26 @@
+name: New API Endpoint or API Ability
+description: Request a new endpoint or API feature be added
+title: "[API Request]: "
+labels: [":nut_and_bolt: API Request"]
+body:
+  - type: textarea
+    id: feature
+    attributes:
+      label: API Endpoint or Feature
+      description: Clearly describe what you'd like to have added to the API.
+    validations:
+      required: true
+  - type: textarea
+    id: usecase
+    attributes:
+      label: Use-Case
+      description: Explain the use-case that you're working-on that requires the above request.
+    validations:
+      required: true
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: Add any other context about the feature request here.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,29 +0,0 @@
----
-name: Bug Report
-about: Create a report to help us improve
-
----
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-
-**Steps To Reproduce**
-Steps to reproduce the behavior:
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
-
-**Expected behavior**
-A clear and concise description of what you expected to happen.
-
-**Screenshots**
-If applicable, add screenshots to help explain your problem.
-
-**Your Configuration (please complete the following information):**
- - Exact BookStack Version (Found in settings):
- - PHP Version:
- - Hosting Method (Nginx/Apache/Docker): 
-
-**Additional context**
-Add any other context about the problem here.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,62 @@
+name: Bug Report
+description: Create a report to help us improve or fix things
+title: "[Bug Report]: "
+labels: [":bug: Bug"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the Bug
+      description: Provide a clear and concise description of what the bug is.
+    validations:
+      required: true
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Steps to Reproduce
+      description: Detail the steps that would replicate this issue
+      placeholder: |
+        1. Go to '...'
+        2. Click on '....'
+        3. Scroll down to '....'
+        4. See error
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected Behaviour
+      description: Provide clear and concise description of what you expected to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: context
+    attributes:
+      label: Screenshots or Additional Context
+      description: Provide any additional context and screenshots here to help us solve this issue
+    validations:
+      required: false
+  - type: input
+    id: bsversion
+    attributes:
+      label: Exact BookStack Version
+      description: This can be found in the settings view of BookStack. Please provide an exact version.
+      placeholder: (eg. v21.08.5)
+    validations:
+      required: true
+  - type: input
+    id: phpversion
+    attributes:
+      label: PHP Version
+      description: Keep in mind your command-line PHP version may differ to that of your webserver. Provide that relevant to the issue.
+      placeholder: (eg. 7.4)
+    validations:
+      required: false
+  - type: textarea
+    id: hosting
+    attributes:
+      label: Hosting Environment
+      description: Describe your hosting environment as much as possible including any proxies used (If applicable).
+      placeholder: (eg. Ubuntu 20.04 VPS, installed using official installation script)
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,14 +0,0 @@
----
-name: Feature Request
-about: Suggest an idea for this project
-
----
-
-**Describe the feature you'd like**
-A clear description of the feature you'd like implemented in BookStack.
-
-**Describe the benefits this feature would bring to BookStack users**
-Explain the measurable benefits this feature would achieve.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,26 @@
+name: Feature Request
+description: Request a new language to be added to CrowdIn for you to translate
+title: "[Feature Request]: "
+labels: [":hammer: Feature Request"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the feature you'd like
+      description: Provide a clear description of the feature you'd like implemented in BookStack
+    validations:
+      required: true
+  - type: textarea
+    id: benefits
+    attributes:
+      label: Describe the benefits this feature would bring to BookStack users
+      description: Explain the measurable benefits this feature would achieve for existing BookStack users
+    validations:
+      required: true
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: Add any other context or screenshots about the feature request here.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/language_request.md

@@ -1,13 +0,0 @@
----
-name: Language Request
-about: Request a new language to be added to Crowdin for you to translate
-
----
-
-### Language To Add
-
-_Specify here the language you want to add._
-
-----
-
-_This issue template is to request a new language be added to our [Crowdin translation management project](https://crowdin.com/project/bookstack). Please don't use this template to request a new language that you are not prepared to provide translations for._   

.github/ISSUE_TEMPLATE/language_request.yml

@@ -0,0 +1,32 @@
+name: Language Request
+description: Request a new language to be added to CrowdIn for you to translate
+title: "[Language Request]: "
+labels: [":earth_africa: Translations"]
+assignees:
+  - ssddanbrown
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for offering to help start a new translation for BookStack!
+  - type: input
+    id: language
+    attributes:
+      label: Language to Add
+      description: What language (and region if applicable) are you offering to help add to BookStack?
+    validations:
+      required: true
+  - type: checkboxes
+    id: confirm
+    attributes:
+      label: Confirmation of Intent
+      description: |
+        This issue template is to request a new language be added to our [Crowdin translation management project](https://crowdin.com/project/bookstack).
+        Please don't use this template to request a new language that you are not prepared to provide translations for.
+      options:
+        - label: I confirm I'm offering to help translate for this new language via CrowdIn.
+          required: true
+  - type: markdown
+    attributes:
+      value: |
+        *__Note: New languages are added at specific points of the development process so it may be a small while before the requested language is added for translation.__*

.github/ISSUE_TEMPLATE/support_request.yml

@@ -0,0 +1,63 @@
+name: Support Request
+description: Request support for a specific problem you have not been able to solve yourself
+title: "[Support Request]: "
+labels: [":dog2: Support"]
+body:
+  - type: checkboxes
+    id: useddocs
+    attributes:
+      label: Attempted Debugging
+      description: |
+        I have read the [BookStack debugging](https://www.bookstackapp.com/docs/admin/debugging/) page and seeked resolution or more
+        detail for the issue.
+      options:
+        - label: I have read the debugging page
+          required: true
+  - type: checkboxes
+    id: searchissue
+    attributes:
+      label: Searched GitHub Issues
+      description: |
+        I have searched for the issue and potential resolutions within the [project's GitHub issue list](https://github.com/BookStackApp/BookStack/issues)
+      options:
+        - label: I have searched GitHub for the issue.
+          required: true
+  - type: textarea
+    id: scenario
+    attributes:
+      label: Describe the Scenario
+      description: Detail the problem that you're having or what you need support with.
+    validations:
+      required: true
+  - type: input
+    id: bsversion
+    attributes:
+      label: Exact BookStack Version
+      description: This can be found in the settings view of BookStack. Please provide an exact version.
+      placeholder: (eg. v21.08.5)
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Log Content
+      description: If the issue has produced an error, provide any [BookStack or server log](https://www.bookstackapp.com/docs/admin/debugging/) content below.
+      placeholder: Be sure to remove any confidential details in your logs
+    validations:
+      required: false
+  - type: input
+    id: phpversion
+    attributes:
+      label: PHP Version
+      description: Keep in mind your command-line PHP version may differ to that of your webserver. Provide that most relevant to the issue.
+      placeholder: (eg. 7.4)
+    validations:
+      required: false
+  - type: textarea
+    id: hosting
+    attributes:
+      label: Hosting Environment
+      description: Describe your hosting environment as much as possible including any proxies used (If applicable).
+      placeholder: (eg. Ubuntu 20.04 VPS, installed using official installation script)
+    validations:
+      required: true

.github/SECURITY.md

@@ -0,0 +1,32 @@
+# Security Policy
+
+## Supported Versions
+
+Only the [latest version](https://github.com/BookStackApp/BookStack/releases) of BookStack is supported.
+We generally don't support older versions of BookStack due to maintenance effort and
+since we aim to provide a fairly stable upgrade path for new versions.
+
+## Security Notifications
+
+If you'd like to be notified of new potential security concerns you can [sign-up to the BookStack security mailing list](https://updates.bookstackapp.com/signup/bookstack-security-updates).
+
+## Reporting a Vulnerability
+
+If you've found an issue that likely has no impact to existing users (For example, in a development-only branch)
+feel free to raise it via a standard GitHub bug report issue.
+
+If the issue could have a security impact to BookStack instances, please use one of the below 
+methods to report the vulnerability:
+
+- Directly contact the lead maintainer [@ssddanbrown](https://github.com/ssddanbrown). 
+  - You will need to login to be able to see the email address on the [GitHub profile page](https://github.com/ssddanbrown).
+  - Alternatively you can send a DM via Twitter to [@ssddanbrown](https://twitter.com/ssddanbrown).
+- [Disclose via huntr.dev](https://huntr.dev/bounties/disclose)
+  - Bounties may be available to you through this platform.
+  - Be sure to use `https://github.com/BookStackApp/BookStack` as the repository URL.
+
+Please be patient while the vulnerability is being reviewed. Deploying the fix to address the vulnerability
+can often take a little time due to the amount of preparation required, to ensure the vulnerability has
+been covered, and to create the content required to adequately notify the user-base.
+
+Thank you for keeping BookStack instances safe!

.github/translators.txt

@@ -192,3 +192,10 @@ Atalonica :: Catalan
 慕容潭谈 (591442386) :: Chinese Simplified
 Radim Pesek (ramess18) :: Czech
 anastasiia.motylko :: Ukrainian
+Indrek Haav (IndrekHaav) :: Estonian
+na3shkw :: Japanese
+Giancarlo Di Massa (digitall-it) :: Italian
+M Nafis Al Mukhdi (mnafisalmukhdi1) :: Indonesian
+sulfo :: Danish
+Raukze :: German
+zygimantus :: Lithuanian

.github/workflows/phpstan.yml

@@ -0,0 +1,41 @@
+name: phpstan
+
+on:
+  push:
+    branches-ignore:
+      - l10n_master
+  pull_request:
+    branches-ignore:
+      - l10n_master
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        php: ['7.3']
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+        extensions: gd, mbstring, json, curl, xml, mysql, ldap
+
+    - name: Get Composer Cache Directory
+      id: composer-cache
+      run: |
+        echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+    - name: Cache composer packages
+      uses: actions/cache@v1
+      with:
+        path: ${{ steps.composer-cache.outputs.dir }}
+        key: ${{ runner.os }}-composer-${{ matrix.php }}
+
+    - name: Install composer dependencies
+      run: composer install --prefer-dist --no-interaction --ansi
+
+    - name: Run PHPStan
+      run: php${{ matrix.php }} ./vendor/bin/phpstan analyse --memory-limit=2G

.github/workflows/phpunit.yml

@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['7.3', '7.4', '8.0']
+        php: ['7.3', '7.4', '8.0', '8.1']
     steps:
     - uses: actions/checkout@v1
 
     - name: Setup PHP
-      uses: shivammathur/setup-php@b7d1d9c9a92d8d8463ce36d7f60da34d461724f8
+      uses: shivammathur/setup-php@v2
       with:
         php-version: ${{ matrix.php }}
         extensions: gd, mbstring, json, curl, xml, mysql, ldap
@@ -45,7 +45,7 @@ jobs:
         mysql -uroot -proot -e "GRANT ALL ON \`bookstack-test\`.* TO 'bookstack-test'@'localhost';"
         mysql -uroot -proot -e 'FLUSH PRIVILEGES;'
 
-    - name: Install composer dependencies & Test
+    - name: Install composer dependencies
       run: composer install --prefer-dist --no-interaction --ansi
 
     - name: Migrate and seed the database

.github/workflows/test-migrations.yml

@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['7.3', '7.4', '8.0']
+        php: ['7.3', '7.4', '8.0', '8.1']
     steps:
       - uses: actions/checkout@v1
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@b7d1d9c9a92d8d8463ce36d7f60da34d461724f8
+        uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
           extensions: gd, mbstring, json, curl, xml, mysql, ldap

.gitignore

@@ -23,4 +23,5 @@ nbproject
 .settings/
 webpack-stats.json
 .phpunit.result.cache
-.DS_Store
+.DS_Store
+phpstan.neon

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2020 Dan Brown and the BookStack Project contributors
+Copyright (c) 2015-present, Dan Brown and the BookStack Project contributors
 https://github.com/BookStackApp/BookStack/graphs/contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

app/Actions/Activity.php

@@ -61,7 +61,7 @@ class Activity extends Model
     /**
      * Checks if another Activity matches the general information of another.
      */
-    public function isSimilarTo(Activity $activityB): bool
+    public function isSimilarTo(self $activityB): bool
     {
         return [$this->type, $this->entity_type, $this->entity_id] === [$activityB->type, $activityB->entity_type, $activityB->entity_id];
     }

app/Actions/Comment.php

@@ -4,6 +4,7 @@ namespace BookStack\Actions;
 
 use BookStack\Model;
 use BookStack\Traits\HasCreatorAndUpdater;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\MorphTo;
 
 /**
@@ -15,6 +16,7 @@ use Illuminate\Database\Eloquent\Relations\MorphTo;
  */
 class Comment extends Model
 {
+    use HasFactory;
     use HasCreatorAndUpdater;
 
     protected $fillable = ['text', 'parent_id'];

app/Actions/CommentRepo.php

@@ -66,13 +66,13 @@ class CommentRepo
     /**
      * Delete a comment from the system.
      */
-    public function delete(Comment $comment)
+    public function delete(Comment $comment): void
     {
         $comment->delete();
     }
 
     /**
-     * Convert the given comment markdown text to HTML.
+     * Convert the given comment Markdown to HTML.
      */
     public function commentToHtml(string $commentText): string
     {
@@ -90,8 +90,9 @@ class CommentRepo
      */
     protected function getNextLocalId(Entity $entity): int
     {
-        $comments = $entity->comments(false)->orderBy('local_id', 'desc')->first();
+        /** @var Comment $comment */
+        $comment = $entity->comments(false)->orderBy('local_id', 'desc')->first();
 
-        return ($comments->local_id ?? 0) + 1;
+        return ($comment->local_id ?? 0) + 1;
     }
 }

app/Actions/Tag.php

@@ -3,10 +3,19 @@
 namespace BookStack\Actions;
 
 use BookStack\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\MorphTo;
 
+/**
+ * @property int    $id
+ * @property string $name
+ * @property string $value
+ * @property int    $order
+ */
 class Tag extends Model
 {
+    use HasFactory;
+
     protected $fillable = ['name', 'value', 'order'];
     protected $hidden = ['id', 'entity_id', 'entity_type', 'created_at', 'updated_at'];
 

app/Actions/TagRepo.php

@@ -4,6 +4,7 @@ namespace BookStack\Actions;
 
 use BookStack\Auth\Permissions\PermissionService;
 use BookStack\Entities\Models\Entity;
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\DB;
 
@@ -12,22 +13,54 @@ class TagRepo
     protected $tag;
     protected $permissionService;
 
-    /**
-     * TagRepo constructor.
-     */
-    public function __construct(Tag $tag, PermissionService $ps)
+    public function __construct(PermissionService $ps)
     {
-        $this->tag = $tag;
         $this->permissionService = $ps;
     }
 
+    /**
+     * Start a query against all tags in the system.
+     */
+    public function queryWithTotals(string $searchTerm, string $nameFilter): Builder
+    {
+        $query = Tag::query()
+            ->select([
+                'name',
+                ($searchTerm || $nameFilter) ? 'value' : DB::raw('COUNT(distinct value) as `values`'),
+                DB::raw('COUNT(id) as usages'),
+                DB::raw('SUM(IF(entity_type = \'BookStack\\\\Page\', 1, 0)) as page_count'),
+                DB::raw('SUM(IF(entity_type = \'BookStack\\\\Chapter\', 1, 0)) as chapter_count'),
+                DB::raw('SUM(IF(entity_type = \'BookStack\\\\Book\', 1, 0)) as book_count'),
+                DB::raw('SUM(IF(entity_type = \'BookStack\\\\BookShelf\', 1, 0)) as shelf_count'),
+            ])
+            ->orderBy($nameFilter ? 'value' : 'name');
+
+        if ($nameFilter) {
+            $query->where('name', '=', $nameFilter);
+            $query->groupBy('value');
+        } elseif ($searchTerm) {
+            $query->groupBy('name', 'value');
+        } else {
+            $query->groupBy('name');
+        }
+
+        if ($searchTerm) {
+            $query->where(function (Builder $query) use ($searchTerm) {
+                $query->where('name', 'like', '%' . $searchTerm . '%')
+                    ->orWhere('value', 'like', '%' . $searchTerm . '%');
+            });
+        }
+
+        return $this->permissionService->filterRestrictedEntityRelations($query, 'tags', 'entity_id', 'entity_type');
+    }
+
     /**
      * Get tag name suggestions from scanning existing tag names.
      * If no search term is given the 50 most popular tag names are provided.
      */
     public function getNameSuggestions(?string $searchTerm): Collection
     {
-        $query = $this->tag->newQuery()
+        $query = Tag::query()
             ->select('*', DB::raw('count(*) as count'))
             ->groupBy('name');
 
@@ -49,7 +82,7 @@ class TagRepo
      */
     public function getValueSuggestions(?string $searchTerm, ?string $tagName): Collection
     {
-        $query = $this->tag->newQuery()
+        $query = Tag::query()
             ->select('*', DB::raw('count(*) as count'))
             ->groupBy('value');
 
@@ -90,9 +123,9 @@ class TagRepo
      */
     protected function newInstanceFromInput(array $input): Tag
     {
-        $name = trim($input['name']);
-        $value = isset($input['value']) ? trim($input['value']) : '';
-
-        return $this->tag->newInstance(['name' => $name, 'value' => $value]);
+        return new Tag([
+            'name'  => trim($input['name']),
+            'value' => trim($input['value'] ?? ''),
+        ]);
     }
 }

app/Api/ApiDocsGenerator.php

@@ -28,7 +28,7 @@ class ApiDocsGenerator
         if (Cache::has($cacheKey) && config('app.env') === 'production') {
             $docs = Cache::get($cacheKey);
         } else {
-            $docs = (new static())->generate();
+            $docs = (new ApiDocsGenerator())->generate();
             Cache::put($cacheKey, $docs, 60 * 24);
         }
 
@@ -55,10 +55,16 @@ class ApiDocsGenerator
     {
         return $routes->map(function (array $route) {
             $exampleTypes = ['request', 'response'];
+            $fileTypes = ['json', 'http'];
             foreach ($exampleTypes as $exampleType) {
-                $exampleFile = base_path("dev/api/{$exampleType}s/{$route['name']}.json");
-                $exampleContent = file_exists($exampleFile) ? file_get_contents($exampleFile) : null;
-                $route["example_{$exampleType}"] = $exampleContent;
+                foreach ($fileTypes as $fileType) {
+                    $exampleFile = base_path("dev/api/{$exampleType}s/{$route['name']}." . $fileType);
+                    if (file_exists($exampleFile)) {
+                        $route["example_{$exampleType}"] = file_get_contents($exampleFile);
+                        continue 2;
+                    }
+                }
+                $route["example_{$exampleType}"] = null;
             }
 
             return $route;
@@ -95,17 +101,14 @@ class ApiDocsGenerator
         }
 
         $rules = $class->getValdationRules()[$methodName] ?? [];
-        foreach ($rules as $param => $ruleString) {
-            $rules[$param] = explode('|', $ruleString);
-        }
 
-        return count($rules) > 0 ? $rules : null;
+        return empty($rules) ? null : $rules;
     }
 
     /**
      * Parse out the description text from a class method comment.
      */
-    protected function parseDescriptionFromMethodComment(string $comment)
+    protected function parseDescriptionFromMethodComment(string $comment): string
     {
         $matches = [];
         preg_match_all('/^\s*?\*\s((?![@\s]).*?)$/m', $comment, $matches);

app/Api/ApiToken.php

@@ -43,7 +43,7 @@ class ApiToken extends Model implements Loggable
     }
 
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function logDescriptor(): string
     {

app/Api/ApiTokenGuard.php

@@ -42,7 +42,7 @@ class ApiTokenGuard implements Guard
     }
 
     /**
-     * @inheritDoc
+     * {@inheritdoc}
      */
     public function user()
     {
@@ -152,7 +152,7 @@ class ApiTokenGuard implements Guard
     }
 
     /**
-     * @inheritDoc
+     * {@inheritdoc}
      */
     public function validate(array $credentials = [])
     {

app/Auth/Access/GroupSyncService.php

@@ -6,7 +6,7 @@ use BookStack\Auth\Role;
 use BookStack\Auth\User;
 use Illuminate\Support\Collection;
 
-class ExternalAuthService
+class GroupSyncService
 {
     /**
      * Check a role against an array of group names to see if it matches.
@@ -60,13 +60,13 @@ class ExternalAuthService
     /**
      * Sync the groups to the user roles for the current user.
      */
-    public function syncWithGroups(User $user, array $userGroups): void
+    public function syncUserWithFoundGroups(User $user, array $userGroups, bool $detachExisting): void
     {
         // Get the ids for the roles from the names
         $groupsAsRoles = $this->matchGroupsToSystemsRoles($userGroups);
 
         // Sync groups
-        if ($this->config['remove_from_groups']) {
+        if ($detachExisting) {
             $user->roles()->sync($groupsAsRoles);
             $user->attachDefaultRole();
         } else {

app/Auth/Access/Guards/AsyncExternalBaseSessionGuard.php

@@ -10,7 +10,7 @@ namespace BookStack\Auth\Access\Guards;
  * via the Saml2 controller & Saml2Service. This class provides a safer, thin
  * version of SessionGuard.
  */
-class Saml2SessionGuard extends ExternalBaseSessionGuard
+class AsyncExternalBaseSessionGuard extends ExternalBaseSessionGuard
 {
     /**
      * Validate a user's credentials.

app/Auth/Access/Guards/LdapSessionGuard.php

@@ -94,7 +94,7 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
         }
 
         // Attach avatar if non-existent
-        if (is_null($user->avatar)) {
+        if (!$user->avatar()->exists()) {
             $this->ldapService->saveAndAttachAvatar($user, $userDetails);
         }
 

app/Auth/Access/Ldap.php

@@ -10,14 +10,11 @@ namespace BookStack\Auth\Access;
 class Ldap
 {
     /**
-     * Connect to a LDAP server.
-     *
-     * @param string $hostName
-     * @param int    $port
+     * Connect to an LDAP server.
      *
      * @return resource
      */
-    public function connect($hostName, $port)
+    public function connect(string $hostName, int $port)
     {
         return ldap_connect($hostName, $port);
     }
@@ -26,12 +23,9 @@ class Ldap
      * Set the value of a LDAP option for the given connection.
      *
      * @param resource $ldapConnection
-     * @param int      $option
      * @param mixed    $value
-     *
-     * @return bool
      */
-    public function setOption($ldapConnection, $option, $value)
+    public function setOption($ldapConnection, int $option, $value): bool
     {
         return ldap_set_option($ldapConnection, $option, $value);
     }
@@ -47,12 +41,9 @@ class Ldap
     /**
      * Set the version number for the given ldap connection.
      *
-     * @param $ldapConnection
-     * @param $version
-     *
-     * @return bool
+     * @param resource $ldapConnection
      */
-    public function setVersion($ldapConnection, $version)
+    public function setVersion($ldapConnection, int $version): bool
     {
         return $this->setOption($ldapConnection, LDAP_OPT_PROTOCOL_VERSION, $version);
     }

app/Auth/Access/LdapService.php

@@ -13,9 +13,10 @@ use Illuminate\Support\Facades\Log;
  * Class LdapService
  * Handles any app-specific LDAP tasks.
  */
-class LdapService extends ExternalAuthService
+class LdapService
 {
     protected $ldap;
+    protected $groupSyncService;
     protected $ldapConnection;
     protected $userAvatars;
     protected $config;
@@ -24,20 +25,19 @@ class LdapService extends ExternalAuthService
     /**
      * LdapService constructor.
      */
-    public function __construct(Ldap $ldap, UserAvatars $userAvatars)
+    public function __construct(Ldap $ldap, UserAvatars $userAvatars, GroupSyncService $groupSyncService)
     {
         $this->ldap = $ldap;
         $this->userAvatars = $userAvatars;
+        $this->groupSyncService = $groupSyncService;
         $this->config = config('services.ldap');
         $this->enabled = config('auth.method') === 'ldap';
     }
 
     /**
      * Check if groups should be synced.
-     *
-     * @return bool
      */
-    public function shouldSyncGroups()
+    public function shouldSyncGroups(): bool
     {
         return $this->enabled && $this->config['user_to_groups'] !== false;
     }
@@ -285,9 +285,8 @@ class LdapService extends ExternalAuthService
         }
 
         $userGroups = $this->groupFilter($user);
-        $userGroups = $this->getGroupsRecursive($userGroups, []);
 
-        return $userGroups;
+        return $this->getGroupsRecursive($userGroups, []);
     }
 
     /**
@@ -374,7 +373,7 @@ class LdapService extends ExternalAuthService
     public function syncGroups(User $user, string $username)
     {
         $userLdapGroups = $this->getUserGroups($username);
-        $this->syncWithGroups($user, $userLdapGroups);
+        $this->groupSyncService->syncUserWithFoundGroups($user, $userLdapGroups, $this->config['remove_from_groups']);
     }
 
     /**

app/Auth/Access/LoginService.php

@@ -47,7 +47,7 @@ class LoginService
 
         // Authenticate on all session guards if a likely admin
         if ($user->can('users-manage') && $user->can('user-roles-manage')) {
-            $guards = ['standard', 'ldap', 'saml2'];
+            $guards = ['standard', 'ldap', 'saml2', 'oidc'];
             foreach ($guards as $guard) {
                 auth($guard)->login($user);
             }

app/Auth/Access/Oidc/OidcAccessToken.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+use InvalidArgumentException;
+use League\OAuth2\Client\Token\AccessToken;
+
+class OidcAccessToken extends AccessToken
+{
+    /**
+     * Constructs an access token.
+     *
+     * @param array $options An array of options returned by the service provider
+     *                       in the access token request. The `access_token` option is required.
+     *
+     * @throws InvalidArgumentException if `access_token` is not provided in `$options`.
+     */
+    public function __construct(array $options = [])
+    {
+        parent::__construct($options);
+        $this->validate($options);
+    }
+
+    /**
+     * Validate this access token response for OIDC.
+     * As per https://openid.net/specs/openid-connect-basic-1_0.html#TokenOK.
+     */
+    private function validate(array $options): void
+    {
+        // access_token: REQUIRED. Access Token for the UserInfo Endpoint.
+        // Performed on the extended class
+
+        // token_type: REQUIRED. OAuth 2.0 Token Type value. The value MUST be Bearer, as specified in OAuth 2.0
+        // Bearer Token Usage [RFC6750], for Clients using this subset.
+        // Note that the token_type value is case-insensitive.
+        if (strtolower(($options['token_type'] ?? '')) !== 'bearer') {
+            throw new InvalidArgumentException('The response token type MUST be "Bearer"');
+        }
+
+        // id_token: REQUIRED. ID Token.
+        if (empty($options['id_token'])) {
+            throw new InvalidArgumentException('An "id_token" property must be provided');
+        }
+    }
+
+    /**
+     * Get the id token value from this access token response.
+     */
+    public function getIdToken(): string
+    {
+        return $this->getValues()['id_token'];
+    }
+}

app/Auth/Access/Oidc/OidcIdToken.php

@@ -0,0 +1,238 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+class OidcIdToken
+{
+    /**
+     * @var array
+     */
+    protected $header;
+
+    /**
+     * @var array
+     */
+    protected $payload;
+
+    /**
+     * @var string
+     */
+    protected $signature;
+
+    /**
+     * @var array[]|string[]
+     */
+    protected $keys;
+
+    /**
+     * @var string
+     */
+    protected $issuer;
+
+    /**
+     * @var array
+     */
+    protected $tokenParts = [];
+
+    public function __construct(string $token, string $issuer, array $keys)
+    {
+        $this->keys = $keys;
+        $this->issuer = $issuer;
+        $this->parse($token);
+    }
+
+    /**
+     * Parse the token content into its components.
+     */
+    protected function parse(string $token): void
+    {
+        $this->tokenParts = explode('.', $token);
+        $this->header = $this->parseEncodedTokenPart($this->tokenParts[0]);
+        $this->payload = $this->parseEncodedTokenPart($this->tokenParts[1] ?? '');
+        $this->signature = $this->base64UrlDecode($this->tokenParts[2] ?? '') ?: '';
+    }
+
+    /**
+     * Parse a Base64-JSON encoded token part.
+     * Returns the data as a key-value array or empty array upon error.
+     */
+    protected function parseEncodedTokenPart(string $part): array
+    {
+        $json = $this->base64UrlDecode($part) ?: '{}';
+        $decoded = json_decode($json, true);
+
+        return is_array($decoded) ? $decoded : [];
+    }
+
+    /**
+     * Base64URL decode. Needs some character conversions to be compatible
+     * with PHP's default base64 handling.
+     */
+    protected function base64UrlDecode(string $encoded): string
+    {
+        return base64_decode(strtr($encoded, '-_', '+/'));
+    }
+
+    /**
+     * Validate all possible parts of the id token.
+     *
+     * @throws OidcInvalidTokenException
+     */
+    public function validate(string $clientId): bool
+    {
+        $this->validateTokenStructure();
+        $this->validateTokenSignature();
+        $this->validateTokenClaims($clientId);
+
+        return true;
+    }
+
+    /**
+     * Fetch a specific claim from this token.
+     * Returns null if it is null or does not exist.
+     *
+     * @return mixed|null
+     */
+    public function getClaim(string $claim)
+    {
+        return $this->payload[$claim] ?? null;
+    }
+
+    /**
+     * Get all returned claims within the token.
+     */
+    public function getAllClaims(): array
+    {
+        return $this->payload;
+    }
+
+    /**
+     * Validate the structure of the given token and ensure we have the required pieces.
+     * As per https://datatracker.ietf.org/doc/html/rfc7519#section-7.2.
+     *
+     * @throws OidcInvalidTokenException
+     */
+    protected function validateTokenStructure(): void
+    {
+        foreach (['header', 'payload'] as $prop) {
+            if (empty($this->$prop) || !is_array($this->$prop)) {
+                throw new OidcInvalidTokenException("Could not parse out a valid {$prop} within the provided token");
+            }
+        }
+
+        if (empty($this->signature) || !is_string($this->signature)) {
+            throw new OidcInvalidTokenException('Could not parse out a valid signature within the provided token');
+        }
+    }
+
+    /**
+     * Validate the signature of the given token and ensure it validates against the provided key.
+     *
+     * @throws OidcInvalidTokenException
+     */
+    protected function validateTokenSignature(): void
+    {
+        if ($this->header['alg'] !== 'RS256') {
+            throw new OidcInvalidTokenException("Only RS256 signature validation is supported. Token reports using {$this->header['alg']}");
+        }
+
+        $parsedKeys = array_map(function ($key) {
+            try {
+                return new OidcJwtSigningKey($key);
+            } catch (OidcInvalidKeyException $e) {
+                throw new OidcInvalidTokenException('Failed to read signing key with error: ' . $e->getMessage());
+            }
+        }, $this->keys);
+
+        $parsedKeys = array_filter($parsedKeys);
+
+        $contentToSign = $this->tokenParts[0] . '.' . $this->tokenParts[1];
+        /** @var OidcJwtSigningKey $parsedKey */
+        foreach ($parsedKeys as $parsedKey) {
+            if ($parsedKey->verify($contentToSign, $this->signature)) {
+                return;
+            }
+        }
+
+        throw new OidcInvalidTokenException('Token signature could not be validated using the provided keys');
+    }
+
+    /**
+     * Validate the claims of the token.
+     * As per https://openid.net/specs/openid-connect-basic-1_0.html#IDTokenValidation.
+     *
+     * @throws OidcInvalidTokenException
+     */
+    protected function validateTokenClaims(string $clientId): void
+    {
+        // 1. The Issuer Identifier for the OpenID Provider (which is typically obtained during Discovery)
+        // MUST exactly match the value of the iss (issuer) Claim.
+        if (empty($this->payload['iss']) || $this->issuer !== $this->payload['iss']) {
+            throw new OidcInvalidTokenException('Missing or non-matching token issuer value');
+        }
+
+        // 2. The Client MUST validate that the aud (audience) Claim contains its client_id value registered
+        // at the Issuer identified by the iss (issuer) Claim as an audience. The ID Token MUST be rejected
+        // if the ID Token does not list the Client as a valid audience, or if it contains additional
+        // audiences not trusted by the Client.
+        if (empty($this->payload['aud'])) {
+            throw new OidcInvalidTokenException('Missing token audience value');
+        }
+
+        $aud = is_string($this->payload['aud']) ? [$this->payload['aud']] : $this->payload['aud'];
+        if (count($aud) !== 1) {
+            throw new OidcInvalidTokenException('Token audience value has ' . count($aud) . ' values, Expected 1');
+        }
+
+        if ($aud[0] !== $clientId) {
+            throw new OidcInvalidTokenException('Token audience value did not match the expected client_id');
+        }
+
+        // 3. If the ID Token contains multiple audiences, the Client SHOULD verify that an azp Claim is present.
+        // NOTE: Addressed by enforcing a count of 1 above.
+
+        // 4. If an azp (authorized party) Claim is present, the Client SHOULD verify that its client_id
+        // is the Claim Value.
+        if (isset($this->payload['azp']) && $this->payload['azp'] !== $clientId) {
+            throw new OidcInvalidTokenException('Token authorized party exists but does not match the expected client_id');
+        }
+
+        // 5. The current time MUST be before the time represented by the exp Claim
+        // (possibly allowing for some small leeway to account for clock skew).
+        if (empty($this->payload['exp'])) {
+            throw new OidcInvalidTokenException('Missing token expiration time value');
+        }
+
+        $skewSeconds = 120;
+        $now = time();
+        if ($now >= (intval($this->payload['exp']) + $skewSeconds)) {
+            throw new OidcInvalidTokenException('Token has expired');
+        }
+
+        // 6. The iat Claim can be used to reject tokens that were issued too far away from the current time,
+        // limiting the amount of time that nonces need to be stored to prevent attacks.
+        // The acceptable range is Client specific.
+        if (empty($this->payload['iat'])) {
+            throw new OidcInvalidTokenException('Missing token issued at time value');
+        }
+
+        $dayAgo = time() - 86400;
+        $iat = intval($this->payload['iat']);
+        if ($iat > ($now + $skewSeconds) || $iat < $dayAgo) {
+            throw new OidcInvalidTokenException('Token issue at time is not recent or is invalid');
+        }
+
+        // 7. If the acr Claim was requested, the Client SHOULD check that the asserted Claim Value is appropriate.
+        // The meaning and processing of acr Claim Values is out of scope for this document.
+        // NOTE: Not used for our case here. acr is not requested.
+
+        // 8. When a max_age request is made, the Client SHOULD check the auth_time Claim value and request
+        // re-authentication if it determines too much time has elapsed since the last End-User authentication.
+        // NOTE: Not used for our case here. A max_age request is not made.
+
+        // Custom: Ensure the "sub" (Subject) Claim exists and has a value.
+        if (empty($this->payload['sub'])) {
+            throw new OidcInvalidTokenException('Missing token subject value');
+        }
+    }
+}

app/Auth/Access/Oidc/OidcInvalidKeyException.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+class OidcInvalidKeyException extends \Exception
+{
+}

app/Auth/Access/Oidc/OidcInvalidTokenException.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+use Exception;
+
+class OidcInvalidTokenException extends Exception
+{
+}

app/Auth/Access/Oidc/OidcIssuerDiscoveryException.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+class OidcIssuerDiscoveryException extends \Exception
+{
+}

app/Auth/Access/Oidc/OidcJwtSigningKey.php

@@ -0,0 +1,109 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+use phpseclib3\Crypt\Common\PublicKey;
+use phpseclib3\Crypt\PublicKeyLoader;
+use phpseclib3\Crypt\RSA;
+use phpseclib3\Math\BigInteger;
+
+class OidcJwtSigningKey
+{
+    /**
+     * @var PublicKey
+     */
+    protected $key;
+
+    /**
+     * Can be created either from a JWK parameter array or local file path to load a certificate from.
+     * Examples:
+     * 'file:///var/www/cert.pem'
+     * ['kty' => 'RSA', 'alg' => 'RS256', 'n' => 'abc123...'].
+     *
+     * @param array|string $jwkOrKeyPath
+     *
+     * @throws OidcInvalidKeyException
+     */
+    public function __construct($jwkOrKeyPath)
+    {
+        if (is_array($jwkOrKeyPath)) {
+            $this->loadFromJwkArray($jwkOrKeyPath);
+        } elseif (is_string($jwkOrKeyPath) && strpos($jwkOrKeyPath, 'file://') === 0) {
+            $this->loadFromPath($jwkOrKeyPath);
+        } else {
+            throw new OidcInvalidKeyException('Unexpected type of key value provided');
+        }
+    }
+
+    /**
+     * @throws OidcInvalidKeyException
+     */
+    protected function loadFromPath(string $path)
+    {
+        try {
+            $this->key = PublicKeyLoader::load(
+                file_get_contents($path)
+            )->withPadding(RSA::SIGNATURE_PKCS1);
+        } catch (\Exception $exception) {
+            throw new OidcInvalidKeyException("Failed to load key from file path with error: {$exception->getMessage()}");
+        }
+
+        if (!($this->key instanceof RSA)) {
+            throw new OidcInvalidKeyException('Key loaded from file path is not an RSA key as expected');
+        }
+    }
+
+    /**
+     * @throws OidcInvalidKeyException
+     */
+    protected function loadFromJwkArray(array $jwk)
+    {
+        if ($jwk['alg'] !== 'RS256') {
+            throw new OidcInvalidKeyException("Only RS256 keys are currently supported. Found key using {$jwk['alg']}");
+        }
+
+        if (empty($jwk['use'])) {
+            throw new OidcInvalidKeyException('A "use" parameter on the provided key is expected');
+        }
+
+        if ($jwk['use'] !== 'sig') {
+            throw new OidcInvalidKeyException("Only signature keys are currently supported. Found key for use {$jwk['use']}");
+        }
+
+        if (empty($jwk['e'])) {
+            throw new OidcInvalidKeyException('An "e" parameter on the provided key is expected');
+        }
+
+        if (empty($jwk['n'])) {
+            throw new OidcInvalidKeyException('A "n" parameter on the provided key is expected');
+        }
+
+        $n = strtr($jwk['n'] ?? '', '-_', '+/');
+
+        try {
+            /** @var RSA $key */
+            $this->key = PublicKeyLoader::load([
+                'e' => new BigInteger(base64_decode($jwk['e']), 256),
+                'n' => new BigInteger(base64_decode($n), 256),
+            ])->withPadding(RSA::SIGNATURE_PKCS1);
+        } catch (\Exception $exception) {
+            throw new OidcInvalidKeyException("Failed to load key from JWK parameters with error: {$exception->getMessage()}");
+        }
+    }
+
+    /**
+     * Use this key to sign the given content and return the signature.
+     */
+    public function verify(string $content, string $signature): bool
+    {
+        return $this->key->verify($content, $signature);
+    }
+
+    /**
+     * Convert the key to a PEM encoded key string.
+     */
+    public function toPem(): string
+    {
+        return $this->key->toString('PKCS8');
+    }
+}

app/Auth/Access/Oidc/OidcOAuthProvider.php

@@ -0,0 +1,127 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+use League\OAuth2\Client\Grant\AbstractGrant;
+use League\OAuth2\Client\Provider\AbstractProvider;
+use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
+use League\OAuth2\Client\Provider\GenericResourceOwner;
+use League\OAuth2\Client\Provider\ResourceOwnerInterface;
+use League\OAuth2\Client\Token\AccessToken;
+use League\OAuth2\Client\Tool\BearerAuthorizationTrait;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Extended OAuth2Provider for using with OIDC.
+ * Credit to the https://github.com/steverhoades/oauth2-openid-connect-client
+ * project for the idea of extending a League\OAuth2 client for this use-case.
+ */
+class OidcOAuthProvider extends AbstractProvider
+{
+    use BearerAuthorizationTrait;
+
+    /**
+     * @var string
+     */
+    protected $authorizationEndpoint;
+
+    /**
+     * @var string
+     */
+    protected $tokenEndpoint;
+
+    /**
+     * Returns the base URL for authorizing a client.
+     */
+    public function getBaseAuthorizationUrl(): string
+    {
+        return $this->authorizationEndpoint;
+    }
+
+    /**
+     * Returns the base URL for requesting an access token.
+     */
+    public function getBaseAccessTokenUrl(array $params): string
+    {
+        return $this->tokenEndpoint;
+    }
+
+    /**
+     * Returns the URL for requesting the resource owner's details.
+     */
+    public function getResourceOwnerDetailsUrl(AccessToken $token): string
+    {
+        return '';
+    }
+
+    /**
+     * Returns the default scopes used by this provider.
+     *
+     * This should only be the scopes that are required to request the details
+     * of the resource owner, rather than all the available scopes.
+     */
+    protected function getDefaultScopes(): array
+    {
+        return ['openid', 'profile', 'email'];
+    }
+
+    /**
+     * Returns the string that should be used to separate scopes when building
+     * the URL for requesting an access token.
+     */
+    protected function getScopeSeparator(): string
+    {
+        return ' ';
+    }
+
+    /**
+     * Checks a provider response for errors.
+     *
+     * @param ResponseInterface $response
+     * @param array|string      $data     Parsed response data
+     *
+     * @throws IdentityProviderException
+     *
+     * @return void
+     */
+    protected function checkResponse(ResponseInterface $response, $data)
+    {
+        if ($response->getStatusCode() >= 400 || isset($data['error'])) {
+            throw new IdentityProviderException(
+                $data['error'] ?? $response->getReasonPhrase(),
+                $response->getStatusCode(),
+                (string) $response->getBody()
+            );
+        }
+    }
+
+    /**
+     * Generates a resource owner object from a successful resource owner
+     * details request.
+     *
+     * @param array       $response
+     * @param AccessToken $token
+     *
+     * @return ResourceOwnerInterface
+     */
+    protected function createResourceOwner(array $response, AccessToken $token)
+    {
+        return new GenericResourceOwner($response, '');
+    }
+
+    /**
+     * Creates an access token from a response.
+     *
+     * The grant that was used to fetch the response can be used to provide
+     * additional context.
+     *
+     * @param array         $response
+     * @param AbstractGrant $grant
+     *
+     * @return OidcAccessToken
+     */
+    protected function createAccessToken(array $response, AbstractGrant $grant)
+    {
+        return new OidcAccessToken($response);
+    }
+}

app/Auth/Access/Oidc/OidcProviderSettings.php

@@ -0,0 +1,203 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+use GuzzleHttp\Psr7\Request;
+use Illuminate\Contracts\Cache\Repository;
+use InvalidArgumentException;
+use Psr\Http\Client\ClientExceptionInterface;
+use Psr\Http\Client\ClientInterface;
+
+/**
+ * OpenIdConnectProviderSettings
+ * Acts as a DTO for settings used within the oidc request and token handling.
+ * Performs auto-discovery upon request.
+ */
+class OidcProviderSettings
+{
+    /**
+     * @var string
+     */
+    public $issuer;
+
+    /**
+     * @var string
+     */
+    public $clientId;
+
+    /**
+     * @var string
+     */
+    public $clientSecret;
+
+    /**
+     * @var string
+     */
+    public $redirectUri;
+
+    /**
+     * @var string
+     */
+    public $authorizationEndpoint;
+
+    /**
+     * @var string
+     */
+    public $tokenEndpoint;
+
+    /**
+     * @var string[]|array[]
+     */
+    public $keys = [];
+
+    public function __construct(array $settings)
+    {
+        $this->applySettingsFromArray($settings);
+        $this->validateInitial();
+    }
+
+    /**
+     * Apply an array of settings to populate setting properties within this class.
+     */
+    protected function applySettingsFromArray(array $settingsArray)
+    {
+        foreach ($settingsArray as $key => $value) {
+            if (property_exists($this, $key)) {
+                $this->$key = $value;
+            }
+        }
+    }
+
+    /**
+     * Validate any core, required properties have been set.
+     *
+     * @throws InvalidArgumentException
+     */
+    protected function validateInitial()
+    {
+        $required = ['clientId', 'clientSecret', 'redirectUri', 'issuer'];
+        foreach ($required as $prop) {
+            if (empty($this->$prop)) {
+                throw new InvalidArgumentException("Missing required configuration \"{$prop}\" value");
+            }
+        }
+
+        if (strpos($this->issuer, 'https://') !== 0) {
+            throw new InvalidArgumentException('Issuer value must start with https://');
+        }
+    }
+
+    /**
+     * Perform a full validation on these settings.
+     *
+     * @throws InvalidArgumentException
+     */
+    public function validate(): void
+    {
+        $this->validateInitial();
+        $required = ['keys', 'tokenEndpoint', 'authorizationEndpoint'];
+        foreach ($required as $prop) {
+            if (empty($this->$prop)) {
+                throw new InvalidArgumentException("Missing required configuration \"{$prop}\" value");
+            }
+        }
+    }
+
+    /**
+     * Discover and autoload settings from the configured issuer.
+     *
+     * @throws OidcIssuerDiscoveryException
+     */
+    public function discoverFromIssuer(ClientInterface $httpClient, Repository $cache, int $cacheMinutes)
+    {
+        try {
+            $cacheKey = 'oidc-discovery::' . $this->issuer;
+            $discoveredSettings = $cache->remember($cacheKey, $cacheMinutes * 60, function () use ($httpClient) {
+                return $this->loadSettingsFromIssuerDiscovery($httpClient);
+            });
+            $this->applySettingsFromArray($discoveredSettings);
+        } catch (ClientExceptionInterface $exception) {
+            throw new OidcIssuerDiscoveryException("HTTP request failed during discovery with error: {$exception->getMessage()}");
+        }
+    }
+
+    /**
+     * @throws OidcIssuerDiscoveryException
+     * @throws ClientExceptionInterface
+     */
+    protected function loadSettingsFromIssuerDiscovery(ClientInterface $httpClient): array
+    {
+        $issuerUrl = rtrim($this->issuer, '/') . '/.well-known/openid-configuration';
+        $request = new Request('GET', $issuerUrl);
+        $response = $httpClient->sendRequest($request);
+        $result = json_decode($response->getBody()->getContents(), true);
+
+        if (empty($result) || !is_array($result)) {
+            throw new OidcIssuerDiscoveryException("Error discovering provider settings from issuer at URL {$issuerUrl}");
+        }
+
+        if ($result['issuer'] !== $this->issuer) {
+            throw new OidcIssuerDiscoveryException('Unexpected issuer value found on discovery response');
+        }
+
+        $discoveredSettings = [];
+
+        if (!empty($result['authorization_endpoint'])) {
+            $discoveredSettings['authorizationEndpoint'] = $result['authorization_endpoint'];
+        }
+
+        if (!empty($result['token_endpoint'])) {
+            $discoveredSettings['tokenEndpoint'] = $result['token_endpoint'];
+        }
+
+        if (!empty($result['jwks_uri'])) {
+            $keys = $this->loadKeysFromUri($result['jwks_uri'], $httpClient);
+            $discoveredSettings['keys'] = $this->filterKeys($keys);
+        }
+
+        return $discoveredSettings;
+    }
+
+    /**
+     * Filter the given JWK keys down to just those we support.
+     */
+    protected function filterKeys(array $keys): array
+    {
+        return array_filter($keys, function (array $key) {
+            return $key['kty'] === 'RSA' && $key['use'] === 'sig' && $key['alg'] === 'RS256';
+        });
+    }
+
+    /**
+     * Return an array of jwks as PHP key=>value arrays.
+     *
+     * @throws ClientExceptionInterface
+     * @throws OidcIssuerDiscoveryException
+     */
+    protected function loadKeysFromUri(string $uri, ClientInterface $httpClient): array
+    {
+        $request = new Request('GET', $uri);
+        $response = $httpClient->sendRequest($request);
+        $result = json_decode($response->getBody()->getContents(), true);
+
+        if (empty($result) || !is_array($result) || !isset($result['keys'])) {
+            throw new OidcIssuerDiscoveryException('Error reading keys from issuer jwks_uri');
+        }
+
+        return $result['keys'];
+    }
+
+    /**
+     * Get the settings needed by an OAuth provider, as a key=>value array.
+     */
+    public function arrayForProvider(): array
+    {
+        $settingKeys = ['clientId', 'clientSecret', 'redirectUri', 'authorizationEndpoint', 'tokenEndpoint'];
+        $settings = [];
+        foreach ($settingKeys as $setting) {
+            $settings[$setting] = $this->$setting;
+        }
+
+        return $settings;
+    }
+}

app/Auth/Access/Oidc/OidcService.php

@@ -0,0 +1,221 @@
+<?php
+
+namespace BookStack\Auth\Access\Oidc;
+
+use function auth;
+use BookStack\Auth\Access\LoginService;
+use BookStack\Auth\Access\RegistrationService;
+use BookStack\Auth\User;
+use BookStack\Exceptions\JsonDebugException;
+use BookStack\Exceptions\OpenIdConnectException;
+use BookStack\Exceptions\StoppedAuthenticationException;
+use BookStack\Exceptions\UserRegistrationException;
+use function config;
+use Exception;
+use Illuminate\Support\Facades\Cache;
+use League\OAuth2\Client\OptionProvider\HttpBasicAuthOptionProvider;
+use Psr\Http\Client\ClientExceptionInterface;
+use Psr\Http\Client\ClientInterface as HttpClient;
+use function trans;
+use function url;
+
+/**
+ * Class OpenIdConnectService
+ * Handles any app-specific OIDC tasks.
+ */
+class OidcService
+{
+    protected $registrationService;
+    protected $loginService;
+    protected $httpClient;
+
+    /**
+     * OpenIdService constructor.
+     */
+    public function __construct(RegistrationService $registrationService, LoginService $loginService, HttpClient $httpClient)
+    {
+        $this->registrationService = $registrationService;
+        $this->loginService = $loginService;
+        $this->httpClient = $httpClient;
+    }
+
+    /**
+     * Initiate an authorization flow.
+     *
+     * @return array{url: string, state: string}
+     */
+    public function login(): array
+    {
+        $settings = $this->getProviderSettings();
+        $provider = $this->getProvider($settings);
+
+        return [
+            'url'   => $provider->getAuthorizationUrl(),
+            'state' => $provider->getState(),
+        ];
+    }
+
+    /**
+     * Process the Authorization response from the authorization server and
+     * return the matching, or new if registration active, user matched to
+     * the authorization server.
+     * Returns null if not authenticated.
+     *
+     * @throws Exception
+     * @throws ClientExceptionInterface
+     */
+    public function processAuthorizeResponse(?string $authorizationCode): ?User
+    {
+        $settings = $this->getProviderSettings();
+        $provider = $this->getProvider($settings);
+
+        // Try to exchange authorization code for access token
+        $accessToken = $provider->getAccessToken('authorization_code', [
+            'code' => $authorizationCode,
+        ]);
+
+        return $this->processAccessTokenCallback($accessToken, $settings);
+    }
+
+    /**
+     * @throws OidcIssuerDiscoveryException
+     * @throws ClientExceptionInterface
+     */
+    protected function getProviderSettings(): OidcProviderSettings
+    {
+        $config = $this->config();
+        $settings = new OidcProviderSettings([
+            'issuer'                => $config['issuer'],
+            'clientId'              => $config['client_id'],
+            'clientSecret'          => $config['client_secret'],
+            'redirectUri'           => url('/oidc/callback'),
+            'authorizationEndpoint' => $config['authorization_endpoint'],
+            'tokenEndpoint'         => $config['token_endpoint'],
+        ]);
+
+        // Use keys if configured
+        if (!empty($config['jwt_public_key'])) {
+            $settings->keys = [$config['jwt_public_key']];
+        }
+
+        // Run discovery
+        if ($config['discover'] ?? false) {
+            $settings->discoverFromIssuer($this->httpClient, Cache::store(null), 15);
+        }
+
+        $settings->validate();
+
+        return $settings;
+    }
+
+    /**
+     * Load the underlying OpenID Connect Provider.
+     */
+    protected function getProvider(OidcProviderSettings $settings): OidcOAuthProvider
+    {
+        return new OidcOAuthProvider($settings->arrayForProvider(), [
+            'httpClient'     => $this->httpClient,
+            'optionProvider' => new HttpBasicAuthOptionProvider(),
+        ]);
+    }
+
+    /**
+     * Calculate the display name.
+     */
+    protected function getUserDisplayName(OidcIdToken $token, string $defaultValue): string
+    {
+        $displayNameAttr = $this->config()['display_name_claims'];
+
+        $displayName = [];
+        foreach ($displayNameAttr as $dnAttr) {
+            $dnComponent = $token->getClaim($dnAttr) ?? '';
+            if ($dnComponent !== '') {
+                $displayName[] = $dnComponent;
+            }
+        }
+
+        if (count($displayName) == 0) {
+            $displayName[] = $defaultValue;
+        }
+
+        return implode(' ', $displayName);
+    }
+
+    /**
+     * Extract the details of a user from an ID token.
+     *
+     * @return array{name: string, email: string, external_id: string}
+     */
+    protected function getUserDetails(OidcIdToken $token): array
+    {
+        $id = $token->getClaim('sub');
+
+        return [
+            'external_id' => $id,
+            'email'       => $token->getClaim('email'),
+            'name'        => $this->getUserDisplayName($token, $id),
+        ];
+    }
+
+    /**
+     * Processes a received access token for a user. Login the user when
+     * they exist, optionally registering them automatically.
+     *
+     * @throws OpenIdConnectException
+     * @throws JsonDebugException
+     * @throws UserRegistrationException
+     * @throws StoppedAuthenticationException
+     */
+    protected function processAccessTokenCallback(OidcAccessToken $accessToken, OidcProviderSettings $settings): User
+    {
+        $idTokenText = $accessToken->getIdToken();
+        $idToken = new OidcIdToken(
+            $idTokenText,
+            $settings->issuer,
+            $settings->keys,
+        );
+
+        if ($this->config()['dump_user_details']) {
+            throw new JsonDebugException($idToken->getAllClaims());
+        }
+
+        try {
+            $idToken->validate($settings->clientId);
+        } catch (OidcInvalidTokenException $exception) {
+            throw new OpenIdConnectException("ID token validate failed with error: {$exception->getMessage()}");
+        }
+
+        $userDetails = $this->getUserDetails($idToken);
+        $isLoggedIn = auth()->check();
+
+        if (empty($userDetails['email'])) {
+            throw new OpenIdConnectException(trans('errors.oidc_no_email_address'));
+        }
+
+        if ($isLoggedIn) {
+            throw new OpenIdConnectException(trans('errors.oidc_already_logged_in'), '/login');
+        }
+
+        $user = $this->registrationService->findOrRegister(
+            $userDetails['name'],
+            $userDetails['email'],
+            $userDetails['external_id']
+        );
+
+        if ($user === null) {
+            throw new OpenIdConnectException(trans('errors.oidc_user_not_registered', ['name' => $userDetails['external_id']]), '/login');
+        }
+
+        $this->loginService->login($user, 'oidc');
+
+        return $user;
+    }
+
+    /**
+     * Get the OIDC config from the application.
+     */
+    protected function config(): array
+    {
+        return config('oidc');
+    }
+}

app/Auth/Access/RegistrationService.php

@@ -11,6 +11,7 @@ use BookStack\Facades\Activity;
 use BookStack\Facades\Theme;
 use BookStack\Theming\ThemeEvents;
 use Exception;
+use Illuminate\Support\Str;
 
 class RegistrationService
 {
@@ -50,6 +51,32 @@ class RegistrationService
         return in_array($authMethod, $authMethodsWithRegistration) && setting('registration-enabled');
     }
 
+    /**
+     * Attempt to find a user in the system otherwise register them as a new
+     * user. For use with external auth systems since password is auto-generated.
+     *
+     * @throws UserRegistrationException
+     */
+    public function findOrRegister(string $name, string $email, string $externalId): User
+    {
+        $user = User::query()
+            ->where('external_auth_id', '=', $externalId)
+            ->first();
+
+        if (is_null($user)) {
+            $userData = [
+                'name'             => $name,
+                'email'            => $email,
+                'password'         => Str::random(32),
+                'external_auth_id' => $externalId,
+            ];
+
+            $user = $this->registerUser($userData, null, false);
+        }
+
+        return $user;
+    }
+
     /**
      * The registrations flow for all users.
      *

app/Auth/Access/Saml2Service.php

@@ -8,8 +8,8 @@ use BookStack\Exceptions\SamlException;
 use BookStack\Exceptions\StoppedAuthenticationException;
 use BookStack\Exceptions\UserRegistrationException;
 use Exception;
-use Illuminate\Support\Str;
 use OneLogin\Saml2\Auth;
+use OneLogin\Saml2\Constants;
 use OneLogin\Saml2\Error;
 use OneLogin\Saml2\IdPMetadataParser;
 use OneLogin\Saml2\ValidationError;
@@ -18,20 +18,25 @@ use OneLogin\Saml2\ValidationError;
  * Class Saml2Service
  * Handles any app-specific SAML tasks.
  */
-class Saml2Service extends ExternalAuthService
+class Saml2Service
 {
     protected $config;
     protected $registrationService;
     protected $loginService;
+    protected $groupSyncService;
 
     /**
      * Saml2Service constructor.
      */
-    public function __construct(RegistrationService $registrationService, LoginService $loginService)
-    {
+    public function __construct(
+        RegistrationService $registrationService,
+        LoginService $loginService,
+        GroupSyncService $groupSyncService
+    ) {
         $this->config = config('saml2');
         $this->registrationService = $registrationService;
         $this->loginService = $loginService;
+        $this->groupSyncService = $groupSyncService;
     }
 
     /**
@@ -55,13 +60,20 @@ class Saml2Service extends ExternalAuthService
      *
      * @throws Error
      */
-    public function logout(): array
+    public function logout(User $user): array
     {
         $toolKit = $this->getToolkit();
         $returnRoute = url('/');
 
         try {
-            $url = $toolKit->logout($returnRoute, [], null, null, true);
+            $url = $toolKit->logout(
+                $returnRoute,
+                [],
+                $user->email,
+                null,
+                true,
+                Constants::NAMEID_EMAIL_ADDRESS
+            );
             $id = $toolKit->getLastRequestID();
         } catch (Error $error) {
             if ($error->getCode() !== Error::SAML_SINGLE_LOGOUT_NOT_SUPPORTED) {
@@ -87,8 +99,11 @@ class Saml2Service extends ExternalAuthService
      * @throws JsonDebugException
      * @throws UserRegistrationException
      */
-    public function processAcsResponse(?string $requestId): ?User
+    public function processAcsResponse(?string $requestId, string $samlResponse): ?User
     {
+        // The SAML2 toolkit expects the response to be within the $_POST superglobal
+        // so we need to manually put it back there at this point.
+        $_POST['SAMLResponse'] = $samlResponse;
         $toolkit = $this->getToolkit();
         $toolkit->processResponse($requestId);
         $errors = $toolkit->getErrors();
@@ -117,8 +132,13 @@ class Saml2Service extends ExternalAuthService
     public function processSlsResponse(?string $requestId): ?string
     {
         $toolkit = $this->getToolkit();
-        $redirect = $toolkit->processSLO(true, $requestId, false, null, true);
 
+        // The $retrieveParametersFromServer in the call below will mean the library will take the query
+        // parameters, used for the response signing, from the raw $_SERVER['QUERY_STRING']
+        // value so that the exact encoding format is matched when checking the signature.
+        // This is primarily due to ADFS encoding query params with lowercase percent encoding while
+        // PHP (And most other sensible providers) standardise on uppercase.
+        $redirect = $toolkit->processSLO(true, $requestId, true, null, true);
         $errors = $toolkit->getErrors();
 
         if (!empty($errors)) {
@@ -258,6 +278,8 @@ class Saml2Service extends ExternalAuthService
 
     /**
      * Extract the details of a user from a SAML response.
+     *
+     * @return array{external_id: string, name: string, email: string, saml_id: string}
      */
     protected function getUserDetails(string $samlID, $samlAttributes): array
     {
@@ -322,31 +344,6 @@ class Saml2Service extends ExternalAuthService
         return $defaultValue;
     }
 
-    /**
-     * Get the user from the database for the specified details.
-     *
-     * @throws UserRegistrationException
-     */
-    protected function getOrRegisterUser(array $userDetails): ?User
-    {
-        $user = User::query()
-          ->where('external_auth_id', '=', $userDetails['external_id'])
-          ->first();
-
-        if (is_null($user)) {
-            $userData = [
-                'name'             => $userDetails['name'],
-                'email'            => $userDetails['email'],
-                'password'         => Str::random(32),
-                'external_auth_id' => $userDetails['external_id'],
-            ];
-
-            $user = $this->registrationService->registerUser($userData, null, false);
-        }
-
-        return $user;
-    }
-
     /**
      * Process the SAML response for a user. Login the user when
      * they exist, optionally registering them automatically.
@@ -377,14 +374,19 @@ class Saml2Service extends ExternalAuthService
             throw new SamlException(trans('errors.saml_already_logged_in'), '/login');
         }
 
-        $user = $this->getOrRegisterUser($userDetails);
+        $user = $this->registrationService->findOrRegister(
+            $userDetails['name'],
+            $userDetails['email'],
+            $userDetails['external_id']
+        );
+
         if ($user === null) {
             throw new SamlException(trans('errors.saml_user_not_registered', ['name' => $userDetails['external_id']]), '/login');
         }
 
         if ($this->shouldSyncGroups()) {
             $groups = $this->getUserGroups($samlAttributes);
-            $this->syncWithGroups($user, $groups);
+            $this->groupSyncService->syncUserWithFoundGroups($user, $groups, $this->config['remove_from_groups']);
         }
 
         $this->loginService->login($user, 'saml2');

app/Auth/Access/SocialAuthService.php

@@ -281,9 +281,6 @@ class SocialAuthService
         if ($driverName === 'google' && config('services.google.select_account')) {
             $driver->with(['prompt' => 'select_account']);
         }
-        if ($driverName === 'azure') {
-            $driver->with(['resource' => 'https://graph.windows.net']);
-        }
 
         if (isset($this->configureForRedirectCallbacks[$driverName])) {
             $this->configureForRedirectCallbacks[$driverName]($driver);

app/Auth/Role.php

@@ -7,6 +7,7 @@ use BookStack\Auth\Permissions\RolePermission;
 use BookStack\Interfaces\Loggable;
 use BookStack\Model;
 use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
@@ -23,6 +24,8 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
  */
 class Role extends Model implements Loggable
 {
+    use HasFactory;
+
     protected $fillable = ['display_name', 'description', 'external_auth_id'];
 
     /**
@@ -83,7 +86,7 @@ class Role extends Model implements Loggable
     /**
      * Get the role of the specified display name.
      */
-    public static function getRole(string $displayName): ?Role
+    public static function getRole(string $displayName): ?self
     {
         return static::query()->where('display_name', '=', $displayName)->first();
     }
@@ -91,7 +94,7 @@ class Role extends Model implements Loggable
     /**
      * Get the role object for the specified system role.
      */
-    public static function getSystemRole(string $systemName): ?Role
+    public static function getSystemRole(string $systemName): ?self
     {
         return static::query()->where('system_name', '=', $systemName)->first();
     }
@@ -116,7 +119,7 @@ class Role extends Model implements Loggable
     }
 
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function logDescriptor(): string
     {

app/Auth/SocialAccount.php

@@ -21,7 +21,7 @@ class SocialAccount extends Model implements Loggable
     }
 
     /**
-     * @inheritDoc
+     * {@inheritdoc}
      */
     public function logDescriptor(): string
     {

app/Auth/User.php

@@ -18,6 +18,7 @@ use Illuminate\Auth\Passwords\CanResetPassword;
 use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
 use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
@@ -27,7 +28,7 @@ use Illuminate\Support\Collection;
 /**
  * Class User.
  *
- * @property string     $id
+ * @property int        $id
  * @property string     $name
  * @property string     $slug
  * @property string     $email
@@ -43,6 +44,7 @@ use Illuminate\Support\Collection;
  */
 class User extends Model implements AuthenticatableContract, CanResetPasswordContract, Loggable, Sluggable
 {
+    use HasFactory;
     use Authenticatable;
     use CanResetPassword;
     use Notifiable;
@@ -90,7 +92,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     /**
      * Returns the default public user.
      */
-    public static function getDefault(): User
+    public static function getDefault(): self
     {
         if (!is_null(static::$defaultUser)) {
             return static::$defaultUser;
@@ -176,7 +178,6 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
             ->leftJoin('permission_role', 'ru.role_id', '=', 'permission_role.role_id')
             ->leftJoin('role_permissions', 'permission_role.permission_id', '=', 'role_permissions.id')
             ->where('ru.user_id', '=', $this->id)
-            ->get()
             ->pluck('name');
 
         return $this->permissions;
@@ -336,7 +337,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     }
 
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function logDescriptor(): string
     {
@@ -344,7 +345,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     }
 
     /**
-     * @inheritDoc
+     * {@inheritdoc}
      */
     public function refreshSlug(): string
     {

app/Config/app.php

@@ -31,6 +31,9 @@ return [
     // Set to -1 for unlimited recycle bin lifetime.
     'recycle_bin_lifetime' => env('RECYCLE_BIN_LIFETIME', 30),
 
+    // The limit for all uploaded files, including images and attachments in MB.
+    'upload_limit' => env('FILE_UPLOAD_SIZE_LIMIT', 50),
+
     // Allow <script> tags to entered within page content.
     // <script> tags are escaped by default.
     // Even when overridden the WYSIWYG editor may still escape script content.
@@ -61,7 +64,7 @@ return [
     'locale' => env('APP_LANG', 'en'),
 
     // Locales available
-    'locales' => ['en', 'ar', 'bg', 'bs', 'ca', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'fa', 'fr', 'he', 'hr', 'hu', 'id', 'it', 'ja', 'ko', 'lt', 'lv', 'nl', 'nb', 'pt', 'pt_BR', 'sk', 'sl', 'sv', 'pl',  'ru', 'th', 'tr', 'uk', 'vi', 'zh_CN', 'zh_TW'],
+    'locales' => ['en', 'ar', 'bg', 'bs', 'ca', 'cs', 'da', 'de', 'de_informal', 'es', 'es_AR', 'et', 'fa', 'fr', 'he', 'hr', 'hu', 'id', 'it', 'ja', 'ko', 'lt', 'lv', 'nl', 'nb', 'pt', 'pt_BR', 'sk', 'sl', 'sv', 'pl',  'ru', 'th', 'tr', 'uk', 'vi', 'zh_CN', 'zh_TW'],
 
     //  Application Fallback Locale
     'fallback_locale' => 'en',
@@ -143,7 +146,6 @@ return [
 
     // Class aliases, Registered on application start
     'aliases' => [
-
         // Laravel
         'App'          => Illuminate\Support\Facades\App::class,
         'Arr'          => Illuminate\Support\Arr::class,
@@ -155,21 +157,23 @@ return [
         'Config'       => Illuminate\Support\Facades\Config::class,
         'Cookie'       => Illuminate\Support\Facades\Cookie::class,
         'Crypt'        => Illuminate\Support\Facades\Crypt::class,
+        'Date'         => Illuminate\Support\Facades\Date::class,
         'DB'           => Illuminate\Support\Facades\DB::class,
         'Eloquent'     => Illuminate\Database\Eloquent\Model::class,
         'Event'        => Illuminate\Support\Facades\Event::class,
         'File'         => Illuminate\Support\Facades\File::class,
+        'Gate'         => Illuminate\Support\Facades\Gate::class,
         'Hash'         => Illuminate\Support\Facades\Hash::class,
-        'Input'        => Illuminate\Support\Facades\Input::class,
-        'Inspiring'    => Illuminate\Foundation\Inspiring::class,
+        'Http'         => Illuminate\Support\Facades\Http::class,
         'Lang'         => Illuminate\Support\Facades\Lang::class,
         'Log'          => Illuminate\Support\Facades\Log::class,
         'Mail'         => Illuminate\Support\Facades\Mail::class,
         'Notification' => Illuminate\Support\Facades\Notification::class,
         'Password'     => Illuminate\Support\Facades\Password::class,
         'Queue'        => Illuminate\Support\Facades\Queue::class,
+        'RateLimiter'  => Illuminate\Support\Facades\RateLimiter::class,
         'Redirect'     => Illuminate\Support\Facades\Redirect::class,
-        'Redis'        => Illuminate\Support\Facades\Redis::class,
+        // 'Redis'        => Illuminate\Support\Facades\Redis::class,
         'Request'      => Illuminate\Support\Facades\Request::class,
         'Response'     => Illuminate\Support\Facades\Response::class,
         'Route'        => Illuminate\Support\Facades\Route::class,
@@ -180,6 +184,8 @@ return [
         'URL'          => Illuminate\Support\Facades\URL::class,
         'Validator'    => Illuminate\Support\Facades\Validator::class,
         'View'         => Illuminate\Support\Facades\View::class,
+
+        // Laravel Packages
         'Socialite'    => Laravel\Socialite\Facades\Socialite::class,
 
         // Third Party

app/Config/auth.php

@@ -10,8 +10,7 @@
 
 return [
 
-    // Method of authentication to use
-    // Options: standard, ldap, saml2
+    // Options: standard, ldap, saml2, oidc
     'method' => env('AUTH_METHOD', 'standard'),
 
     // Authentication Defaults
@@ -26,7 +25,7 @@ return [
     // All authentication drivers have a user provider. This defines how the
     // users are actually retrieved out of your database or other storage
     // mechanisms used by this application to persist your user's data.
-    // Supported drivers: "session", "api-token", "ldap-session"
+    // Supported drivers: "session", "api-token", "ldap-session", "async-external-session"
     'guards' => [
         'standard' => [
             'driver'   => 'session',
@@ -37,11 +36,15 @@ return [
             'provider' => 'external',
         ],
         'saml2' => [
-            'driver'   => 'saml2-session',
+            'driver'   => 'async-external-session',
+            'provider' => 'external',
+        ],
+        'oidc' => [
+            'driver'   => 'async-external-session',
             'provider' => 'external',
         ],
         'api' => [
-            'driver' => 'api-token',
+            'driver'   => 'api-token',
         ],
     ],
 
@@ -54,10 +57,16 @@ return [
             'driver' => 'eloquent',
             'model'  => \BookStack\Auth\User::class,
         ],
+
         'external' => [
             'driver' => 'external-users',
             'model'  => \BookStack\Auth\User::class,
         ],
+
+        // 'users' => [
+        //     'driver' => 'database',
+        //     'table' => 'users',
+        // ],
     ],
 
     // Resetting Passwords
@@ -74,4 +83,10 @@ return [
         ],
     ],
 
+    // Password Confirmation Timeout
+    // Here you may define the amount of seconds before a password confirmation
+    // times out and the user is prompted to re-enter their password via the
+    // confirmation screen. By default, the timeout lasts for three hours.
+    'password_timeout' => 10800,
+
 ];

app/Config/cache.php

@@ -1,5 +1,7 @@
 <?php
 
+use Illuminate\Support\Str;
+
 /**
  * Caching configuration options.
  *
@@ -38,13 +40,15 @@ return [
         ],
 
         'array' => [
-            'driver' => 'array',
+            'driver'    => 'array',
+            'serialize' => false,
         ],
 
         'database' => [
-            'driver'     => 'database',
-            'table'      => 'cache',
-            'connection' => null,
+            'driver'          => 'database',
+            'table'           => 'cache',
+            'connection'      => null,
+            'lock_connection' => null,
         ],
 
         'file' => [
@@ -53,19 +57,36 @@ return [
         ],
 
         'memcached' => [
-            'driver'  => 'memcached',
-            'servers' => env('CACHE_DRIVER') === 'memcached' ? $memcachedServers : [],
+            'driver'        => 'memcached',
+            'options'       => [
+                // Memcached::OPT_CONNECT_TIMEOUT => 2000,
+            ],
+            'servers' => $memcachedServers ?? [],
         ],
 
         'redis' => [
-            'driver'     => 'redis',
-            'connection' => 'default',
+            'driver'          => 'redis',
+            'connection'      => 'default',
+            'lock_connection' => 'default',
+        ],
+
+        'octane' => [
+            'driver' => 'octane',
         ],
 
     ],
 
-    // Cache key prefix
-    // Used to prevent collisions in shared cache systems.
-    'prefix' => env('CACHE_PREFIX', 'bookstack_cache'),
+    /*
+    |--------------------------------------------------------------------------
+    | Cache Key Prefix
+    |--------------------------------------------------------------------------
+    |
+    | When utilizing a RAM based store such as APC or Memcached, there might
+    | be other applications utilizing the same cache. So, we'll specify a
+    | value to get prefixed to all our keys so we can avoid collisions.
+    |
+    */
+
+    'prefix' => env('CACHE_PREFIX', Str::slug(env('APP_NAME', 'laravel'), '_') . '_cache'),
 
 ];

app/Config/clockwork.php

@@ -0,0 +1,415 @@
+<?php
+
+return [
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Enable Clockwork
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork is enabled by default only when your application is in debug mode. Here you can explicitly enable or
+    | disable Clockwork. When disabled, no data is collected and the api and web ui are inactive.
+    |
+    */
+
+    'enable' => env('CLOCKWORK_ENABLE', false),
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Features
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | You can enable or disable various Clockwork features here. Some features have additional settings (eg. slow query
+    | threshold for database queries).
+    |
+    */
+
+    'features' => [
+
+        // Cache usage stats and cache queries including results
+        'cache' => [
+            'enabled' => true,
+
+            // Collect cache queries
+            'collect_queries' => true,
+
+            // Collect values from cache queries (high performance impact with a very high number of queries)
+            'collect_values' => false,
+        ],
+
+        // Database usage stats and queries
+        'database' => [
+            'enabled' => true,
+
+            // Collect database queries (high performance impact with a very high number of queries)
+            'collect_queries' => true,
+
+            // Collect details of models updates (high performance impact with a lot of model updates)
+            'collect_models_actions' => true,
+
+            // Collect details of retrieved models (very high performance impact with a lot of models retrieved)
+            'collect_models_retrieved' => false,
+
+            // Query execution time threshold in miliseconds after which the query will be marked as slow
+            'slow_threshold' => null,
+
+            // Collect only slow database queries
+            'slow_only' => false,
+
+            // Detect and report duplicate (N+1) queries
+            'detect_duplicate_queries' => false,
+        ],
+
+        // Dispatched events
+        'events' => [
+            'enabled' => true,
+
+            // Ignored events (framework events are ignored by default)
+            'ignored_events' => [
+                // App\Events\UserRegistered::class,
+                // 'user.registered'
+            ],
+        ],
+
+        // Laravel log (you can still log directly to Clockwork with laravel log disabled)
+        'log' => [
+            'enabled' => true,
+        ],
+
+        // Sent notifications
+        'notifications' => [
+            'enabled' => true,
+        ],
+
+        // Performance metrics
+        'performance' => [
+            // Allow collecting of client metrics. Requires separate clockwork-browser npm package.
+            'client_metrics' => true,
+        ],
+
+        // Dispatched queue jobs
+        'queue' => [
+            'enabled' => true,
+        ],
+
+        // Redis commands
+        'redis' => [
+            'enabled' => true,
+        ],
+
+        // Routes list
+        'routes' => [
+            'enabled' => false,
+
+            // Collect only routes from particular namespaces (only application routes by default)
+            'only_namespaces' => ['App'],
+        ],
+
+        // Rendered views
+        'views' => [
+            'enabled' => true,
+
+            // Collect views including view data (high performance impact with a high number of views)
+            'collect_data' => false,
+
+            // Use Twig profiler instead of Laravel events for apps using laravel-twigbridge (more precise, but does
+            // not support collecting view data)
+            'use_twig_profiler' => false,
+        ],
+
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Enable web UI
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork comes with a web UI accessibla via http://your.app/clockwork. Here you can enable or disable this
+    | feature. You can also set a custom path for the web UI.
+    |
+    */
+
+    'web' => true,
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Enable toolbar
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork can show a toolbar with basic metrics on all responses. Here you can enable or disable this feature.
+    | Requires a separate clockwork-browser npm library.
+    | For installation instructions see https://underground.works/clockwork/#docs-viewing-data
+    |
+    */
+
+    'toolbar' => true,
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | HTTP requests collection
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork collects data about HTTP requests to your app. Here you can choose which requests should be collected.
+    |
+    */
+
+    'requests' => [
+        // With on-demand mode enabled, Clockwork will only profile requests when the browser extension is open or you
+        // manually pass a "clockwork-profile" cookie or get/post data key.
+        // Optionally you can specify a "secret" that has to be passed as the value to enable profiling.
+        'on_demand' => false,
+
+        // Collect only errors (requests with HTTP 4xx and 5xx responses)
+        'errors_only' => false,
+
+        // Response time threshold in miliseconds after which the request will be marked as slow
+        'slow_threshold' => null,
+
+        // Collect only slow requests
+        'slow_only' => false,
+
+        // Sample the collected requests (eg. set to 100 to collect only 1 in 100 requests)
+        'sample' => false,
+
+        // List of URIs that should not be collected
+        'except' => [
+            '/horizon/.*', // Laravel Horizon requests
+            '/telescope/.*', // Laravel Telescope requests
+            '/_debugbar/.*', // Laravel DebugBar requests
+        ],
+
+        // List of URIs that should be collected, any other URI will not be collected if not empty
+        'only' => [
+            // '/api/.*'
+        ],
+
+        // Don't collect OPTIONS requests, mostly used in the CSRF pre-flight requests and are rarely of interest
+        'except_preflight' => true,
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Artisan commands collection
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork can collect data about executed artisan commands. Here you can enable and configure which commands
+    | should be collected.
+    |
+    */
+
+    'artisan' => [
+        // Enable or disable collection of executed Artisan commands
+        'collect' => false,
+
+        // List of commands that should not be collected (built-in commands are not collected by default)
+        'except' => [
+            // 'inspire'
+        ],
+
+        // List of commands that should be collected, any other command will not be collected if not empty
+        'only' => [
+            // 'inspire'
+        ],
+
+        // Enable or disable collection of command output
+        'collect_output' => false,
+
+        // Enable or disable collection of built-in Laravel commands
+        'except_laravel_commands' => true,
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Queue jobs collection
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork can collect data about executed queue jobs. Here you can enable and configure which queue jobs should
+    | be collected.
+    |
+    */
+
+    'queue' => [
+        // Enable or disable collection of executed queue jobs
+        'collect' => false,
+
+        // List of queue jobs that should not be collected
+        'except' => [
+            // App\Jobs\ExpensiveJob::class
+        ],
+
+        // List of queue jobs that should be collected, any other queue job will not be collected if not empty
+        'only' => [
+            // App\Jobs\BuggyJob::class
+        ],
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Tests collection
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork can collect data about executed tests. Here you can enable and configure which tests should be
+    | collected.
+    |
+    */
+
+    'tests' => [
+        // Enable or disable collection of ran tests
+        'collect' => false,
+
+        // List of tests that should not be collected
+        'except' => [
+            // Tests\Unit\ExampleTest::class
+        ],
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Enable data collection when Clockwork is disabled
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | You can enable this setting to collect data even when Clockwork is disabled. Eg. for future analysis.
+    |
+    */
+
+    'collect_data_always' => false,
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Metadata storage
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Configure how is the metadata collected by Clockwork stored. Two options are available:
+    |   - files - A simple fast storage implementation storing data in one-per-request files.
+    |   - sql - Stores requests in a sql database. Supports MySQL, Postgresql, Sqlite and requires PDO.
+    |
+    */
+
+    'storage' => 'files',
+
+    // Path where the Clockwork metadata is stored
+    'storage_files_path' => storage_path('clockwork'),
+
+    // Compress the metadata files using gzip, trading a little bit of performance for lower disk usage
+    'storage_files_compress' => false,
+
+    // SQL database to use, can be a name of database configured in database.php or a path to a sqlite file
+    'storage_sql_database' => storage_path('clockwork.sqlite'),
+
+    // SQL table name to use, the table is automatically created and udpated when needed
+    'storage_sql_table' => 'clockwork',
+
+    // Maximum lifetime of collected metadata in minutes, older requests will automatically be deleted, false to disable
+    'storage_expiration' => 60 * 24 * 7,
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Authentication
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork can be configured to require authentication before allowing access to the collected data. This might be
+    | useful when the application is publicly accessible. Setting to true will enable a simple authentication with a
+    | pre-configured password. You can also pass a class name of a custom implementation.
+    |
+    */
+
+    'authentication' => false,
+
+    // Password for the simple authentication
+    'authentication_password' => 'VerySecretPassword',
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Stack traces collection
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork can collect stack traces for log messages and certain data like database queries. Here you can set
+    | whether to collect stack traces, limit the number of collected frames and set further configuration. Collecting
+    | long stack traces considerably increases metadata size.
+    |
+    */
+
+    'stack_traces' => [
+        // Enable or disable collecting of stack traces
+        'enabled' => true,
+
+        // Limit the number of frames to be collected
+        'limit' => 10,
+
+        // List of vendor names to skip when determining caller, common vendors are automatically added
+        'skip_vendors' => [
+            // 'phpunit'
+        ],
+
+        // List of namespaces to skip when determining caller
+        'skip_namespaces' => [
+            // 'Laravel'
+        ],
+
+        // List of class names to skip when determining caller
+        'skip_classes' => [
+            // App\CustomLog::class
+        ],
+
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Serialization
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork serializes the collected data to json for storage and transfer. Here you can configure certain aspects
+    | of serialization. Serialization has a large effect on the cpu time and memory usage.
+    |
+    */
+
+    // Maximum depth of serialized multi-level arrays and objects
+    'serialization_depth' => 10,
+
+    // A list of classes that will never be serialized (eg. a common service container class)
+    'serialization_blackbox' => [
+        \Illuminate\Container\Container::class,
+        \Illuminate\Foundation\Application::class,
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Register helpers
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork comes with a "clock" global helper function. You can use this helper to quickly log something and to
+    | access the Clockwork instance.
+    |
+    */
+
+    'register_helpers' => true,
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Send Headers for AJAX request
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | When trying to collect data the AJAX method can sometimes fail if it is missing required headers. For example, an
+    | API might require a version number using Accept headers to route the HTTP request to the correct codebase.
+    |
+    */
+
+    'headers' => [
+        // 'Accept' => 'application/vnd.com.whatever.v1+json',
+    ],
+
+    /*
+    |------------------------------------------------------------------------------------------------------------------
+    | Server-Timing
+    |------------------------------------------------------------------------------------------------------------------
+    |
+    | Clockwork supports the W3C Server Timing specification, which allows for collecting a simple performance metrics
+    | in a cross-browser way. Eg. in Chrome, your app, database and timeline event timings will be shown in the Dev
+    | Tools network tab. This setting specifies the max number of timeline events that will be sent. Setting to false
+    | will disable the feature.
+    |
+    */
+
+    'server_timing' => 10,
+
+];

app/Config/database.php

@@ -105,6 +105,6 @@ return [
     'migrations' => 'migrations',
 
     // Redis configuration to use if set
-    'redis' => env('REDIS_SERVERS', false) ? $redisConfig : [],
+    'redis' => $redisConfig ?? [],
 
 ];

app/Config/filesystems.php

@@ -25,16 +25,14 @@ return [
     // file storage service, such as s3, to store publicly accessible assets.
     'url' => env('STORAGE_URL', false),
 
-    // Default Cloud Filesystem Disk
-    'cloud' => 's3',
-
     // Available filesystem disks
     // Only local, local_secure & s3 are supported by BookStack
     'disks' => [
 
         'local' => [
-            'driver' => 'local',
-            'root'   => public_path(),
+            'driver'     => 'local',
+            'root'       => public_path(),
+            'visibility' => 'public',
         ],
 
         'local_secure_attachments' => [
@@ -43,8 +41,9 @@ return [
         ],
 
         'local_secure_images' => [
-            'driver' => 'local',
-            'root'   => storage_path('uploads/images/'),
+            'driver'     => 'local',
+            'root'       => storage_path('uploads/images/'),
+            'visibility' => 'public',
         ],
 
         's3' => [
@@ -59,4 +58,12 @@ return [
 
     ],
 
+    // Symbolic Links
+    // Here you may configure the symbolic links that will be created when the
+    // `storage:link` Artisan command is executed. The array keys should be
+    // the locations of the links and the values should be their targets.
+    'links' => [
+        public_path('storage') => storage_path('app/public'),
+    ],
+
 ];

app/Config/logging.php

@@ -49,16 +49,9 @@ return [
             'days'   => 7,
         ],
 
-        'slack' => [
-            'driver'   => 'slack',
-            'url'      => env('LOG_SLACK_WEBHOOK_URL'),
-            'username' => 'Laravel Log',
-            'emoji'    => ':boom:',
-            'level'    => 'critical',
-        ],
-
         'stderr' => [
             'driver'  => 'monolog',
+            'level'   => 'debug',
             'handler' => StreamHandler::class,
             'with'    => [
                 'stream' => 'php://stderr',
@@ -99,6 +92,10 @@ return [
         'testing' => [
             'driver' => 'testing',
         ],
+
+        'emergency' => [
+            'path' => storage_path('logs/laravel.log'),
+        ],
     ],
 
     // Failed Login Message

app/Config/mail.php

@@ -11,6 +11,8 @@
 return [
 
     // Mail driver to use.
+    // From Laravel 7+ this is MAIL_MAILER in laravel.
+    // Kept as MAIL_DRIVER in BookStack to prevent breaking change.
     // Options: smtp, sendmail, log, array
     'driver' => env('MAIL_DRIVER', 'smtp'),
 

app/Config/oidc.php

@@ -0,0 +1,35 @@
+<?php
+
+return [
+
+    // Display name, shown to users, for OpenId option
+    'name' => env('OIDC_NAME', 'SSO'),
+
+    // Dump user details after a login request for debugging purposes
+    'dump_user_details' => env('OIDC_DUMP_USER_DETAILS', false),
+
+    // Attribute, within a OpenId token, to find the user's display name
+    'display_name_claims' => explode('|', env('OIDC_DISPLAY_NAME_CLAIMS', 'name')),
+
+    // OAuth2/OpenId client id, as configured in your Authorization server.
+    'client_id' => env('OIDC_CLIENT_ID', null),
+
+    // OAuth2/OpenId client secret, as configured in your Authorization server.
+    'client_secret' => env('OIDC_CLIENT_SECRET', null),
+
+    // The issuer of the identity token (id_token) this will be compared with
+    // what is returned in the token.
+    'issuer' => env('OIDC_ISSUER', null),
+
+    // Auto-discover the relevant endpoints and keys from the issuer.
+    // Fetched details are cached for 15 minutes.
+    'discover' => env('OIDC_ISSUER_DISCOVER', false),
+
+    // Public key that's used to verify the JWT token with.
+    // Can be the key value itself or a local 'file://public.key' reference.
+    'jwt_public_key' => env('OIDC_PUBLIC_KEY', null),
+
+    // OAuth2 endpoints.
+    'authorization_endpoint' => env('OIDC_AUTH_ENDPOINT', null),
+    'token_endpoint'         => env('OIDC_TOKEN_ENDPOINT', null),
+];

app/Config/queue.php

@@ -22,25 +22,29 @@ return [
         ],
 
         'database' => [
-            'driver'      => 'database',
-            'table'       => 'jobs',
-            'queue'       => 'default',
-            'retry_after' => 90,
+            'driver'       => 'database',
+            'table'        => 'jobs',
+            'queue'        => 'default',
+            'retry_after'  => 90,
+            'after_commit' => false,
         ],
 
         'redis' => [
-            'driver'      => 'redis',
-            'connection'  => 'default',
-            'queue'       => env('REDIS_QUEUE', 'default'),
-            'retry_after' => 90,
-            'block_for'   => null,
+            'driver'       => 'redis',
+            'connection'   => 'default',
+            'queue'        => env('REDIS_QUEUE', 'default'),
+            'retry_after'  => 90,
+            'block_for'    => null,
+            'after_commit' => false,
         ],
 
     ],
 
     // Failed queue job logging
     'failed' => [
-        'database' => 'mysql', 'table' => 'failed_jobs',
+        'driver'   => 'database-uuids',
+        'database' => 'mysql',
+        'table'    => 'failed_jobs',
     ],
 
 ];

app/Config/saml2.php

@@ -1,6 +1,7 @@
 <?php
 
 $SAML2_IDP_AUTHNCONTEXT = env('SAML2_IDP_AUTHNCONTEXT', true);
+$SAML2_SP_x509 = env('SAML2_SP_x509', false);
 
 return [
 
@@ -78,10 +79,11 @@ return [
             // represent the requested subject.
             // Take a look on lib/Saml2/Constants.php to see the NameIdFormat supported
             'NameIDFormat' => 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
+
             // Usually x509cert and privateKey of the SP are provided by files placed at
             // the certs folder. But we can also provide them with the following parameters
-            'x509cert'   => '',
-            'privateKey' => '',
+            'x509cert'   => $SAML2_SP_x509 ?: '',
+            'privateKey' => env('SAML2_SP_x509_KEY', ''),
         ],
         // Identity Provider Data that we want connect with our SP
         'idp' => [
@@ -147,6 +149,11 @@ return [
             // Multiple forced values can be passed via a space separated array, For example:
             // SAML2_IDP_AUTHNCONTEXT="urn:federation:authentication:windows urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport"
             'requestedAuthnContext' => is_string($SAML2_IDP_AUTHNCONTEXT) ? explode(' ', $SAML2_IDP_AUTHNCONTEXT) : $SAML2_IDP_AUTHNCONTEXT,
+            // Sign requests and responses if a certificate is in use
+            'logoutRequestSigned'   => (bool) $SAML2_SP_x509,
+            'logoutResponseSigned'  => (bool) $SAML2_SP_x509,
+            'authnRequestsSigned'   => (bool) $SAML2_SP_x509,
+            'lowercaseUrlencoding'  => false,
         ],
     ],
 

app/Console/Commands/CreateAdmin.php

@@ -4,6 +4,7 @@ namespace BookStack\Console\Commands;
 
 use BookStack\Auth\UserRepo;
 use Illuminate\Console\Command;
+use Symfony\Component\Console\Command\Command as SymfonyCommand;
 
 class CreateAdmin extends Command
 {
@@ -49,11 +50,15 @@ class CreateAdmin extends Command
             $email = $this->ask('Please specify an email address for the new admin user');
         }
         if (mb_strlen($email) < 5 || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
-            return $this->error('Invalid email address provided');
+            $this->error('Invalid email address provided');
+
+            return SymfonyCommand::FAILURE;
         }
 
         if ($this->userRepo->getByEmail($email) !== null) {
-            return $this->error('A user with the provided email already exists!');
+            $this->error('A user with the provided email already exists!');
+
+            return SymfonyCommand::FAILURE;
         }
 
         $name = trim($this->option('name'));
@@ -61,7 +66,9 @@ class CreateAdmin extends Command
             $name = $this->ask('Please specify an name for the new admin user');
         }
         if (mb_strlen($name) < 2) {
-            return $this->error('Invalid name provided');
+            $this->error('Invalid name provided');
+
+            return SymfonyCommand::FAILURE;
         }
 
         $password = trim($this->option('password'));
@@ -69,7 +76,9 @@ class CreateAdmin extends Command
             $password = $this->secret('Please specify a password for the new admin user');
         }
         if (mb_strlen($password) < 5) {
-            return $this->error('Invalid password provided, Must be at least 5 characters');
+            $this->error('Invalid password provided, Must be at least 5 characters');
+
+            return SymfonyCommand::FAILURE;
         }
 
         $user = $this->userRepo->create(['email' => $email, 'name' => $name, 'password' => $password]);
@@ -79,5 +88,7 @@ class CreateAdmin extends Command
         $user->save();
 
         $this->info("Admin account with email \"{$user->email}\" successfully created!");
+
+        return SymfonyCommand::SUCCESS;
     }
 }

app/Console/Commands/RegenerateSearch.php

@@ -2,6 +2,7 @@
 
 namespace BookStack\Console\Commands;
 
+use BookStack\Entities\Models\Entity;
 use BookStack\Entities\Tools\SearchIndex;
 use Illuminate\Console\Command;
 use Illuminate\Support\Facades\DB;
@@ -22,6 +23,9 @@ class RegenerateSearch extends Command
      */
     protected $description = 'Re-index all content for searching';
 
+    /**
+     * @var SearchIndex
+     */
     protected $searchIndex;
 
     /**
@@ -45,8 +49,13 @@ class RegenerateSearch extends Command
             DB::setDefaultConnection($this->option('database'));
         }
 
-        $this->searchIndex->indexAllEntities();
+        $this->searchIndex->indexAllEntities(function (Entity $model, int $processed, int $total) {
+            $this->info('Indexed ' . class_basename($model) . ' entries (' . $processed . '/' . $total . ')');
+        });
+
         DB::setDefaultConnection($connection);
-        $this->comment('Search index regenerated');
+        $this->line('Search index regenerated!');
+
+        return static::SUCCESS;
     }
 }

app/Console/Commands/ResetMfa.php

@@ -49,9 +49,10 @@ class ResetMfa extends Command
             return 1;
         }
 
-        /** @var User $user */
         $field = $id ? 'id' : 'email';
         $value = $id ?: $email;
+
+        /** @var User $user */
         $user = User::query()
             ->where($field, '=', $value)
             ->first();

app/Entities/Models/Book.php

@@ -4,6 +4,7 @@ namespace BookStack\Entities\Models;
 
 use BookStack\Uploads\Image;
 use Exception;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
@@ -21,7 +22,9 @@ use Illuminate\Support\Collection;
  */
 class Book extends Entity implements HasCoverImage
 {
-    public $searchFactor = 2;
+    use HasFactory;
+
+    public $searchFactor = 1.2;
 
     protected $fillable = ['name', 'description'];
     protected $hidden = ['restricted', 'pivot', 'image_id', 'deleted_at'];

app/Entities/Models/Bookshelf.php

@@ -3,14 +3,17 @@
 namespace BookStack\Entities\Models;
 
 use BookStack\Uploads\Image;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 
 class Bookshelf extends Entity implements HasCoverImage
 {
+    use HasFactory;
+
     protected $table = 'bookshelves';
 
-    public $searchFactor = 3;
+    public $searchFactor = 1.2;
 
     protected $fillable = ['name', 'description', 'image_id'];
 

app/Entities/Models/Chapter.php

@@ -2,29 +2,29 @@
 
 namespace BookStack\Entities\Models;
 
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Support\Collection;
 
 /**
  * Class Chapter.
  *
  * @property Collection<Page> $pages
- * @property mixed description
+ * @property string           $description
  */
 class Chapter extends BookChild
 {
-    public $searchFactor = 1.3;
+    use HasFactory;
+
+    public $searchFactor = 1.2;
 
     protected $fillable = ['name', 'description', 'priority', 'book_id'];
     protected $hidden = ['restricted', 'pivot', 'deleted_at'];
 
     /**
      * Get the pages that this chapter contains.
-     *
-     * @param string $dir
-     *
-     * @return mixed
      */
-    public function pages($dir = 'ASC')
+    public function pages(string $dir = 'ASC'): HasMany
     {
         return $this->hasMany(Page::class)->orderBy('priority', $dir);
     }
@@ -32,7 +32,7 @@ class Chapter extends BookChild
     /**
      * Get the url of this chapter.
      */
-    public function getUrl($path = ''): string
+    public function getUrl(string $path = ''): string
     {
         $parts = [
             'books',

app/Entities/Models/Deletion.php

@@ -9,7 +9,7 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\MorphTo;
 
 /**
- * @property Model deletable
+ * @property Model $deletable
  */
 class Deletion extends Model implements Loggable
 {
@@ -22,7 +22,7 @@ class Deletion extends Model implements Loggable
     }
 
     /**
-     * The the user that performed the deletion.
+     * Get the user that performed the deletion.
      */
     public function deleter(): BelongsTo
     {
@@ -32,7 +32,7 @@ class Deletion extends Model implements Loggable
     /**
      * Create a new deletion record for the provided entity.
      */
-    public static function createForEntity(Entity $entity): Deletion
+    public static function createForEntity(Entity $entity): self
     {
         $record = (new self())->forceFill([
             'deleted_by'     => user()->id,
@@ -48,7 +48,11 @@ class Deletion extends Model implements Loggable
     {
         $deletable = $this->deletable()->first();
 
-        return "Deletion ({$this->id}) for {$deletable->getType()} ({$deletable->id}) {$deletable->name}";
+        if ($deletable instanceof Entity) {
+            return "Deletion ({$this->id}) for {$deletable->getType()} ({$deletable->id}) {$deletable->name}";
+        }
+
+        return "Deletion ({$this->id})";
     }
 
     /**

app/Entities/Models/Entity.php

@@ -106,7 +106,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
      * Compares this entity to another given entity.
      * Matches by comparing class and id.
      */
-    public function matches(Entity $entity): bool
+    public function matches(self $entity): bool
     {
         return [get_class($this), $this->id] === [get_class($entity), $entity->id];
     }
@@ -114,7 +114,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     /**
      * Checks if the current entity matches or contains the given.
      */
-    public function matchesOrContains(Entity $entity): bool
+    public function matchesOrContains(self $entity): bool
     {
         if ($this->matches($entity)) {
             return true;
@@ -238,20 +238,12 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
         return mb_substr($this->name, 0, $length - 3) . '...';
     }
 
-    /**
-     * Get the body text of this entity.
-     */
-    public function getText(): string
-    {
-        return $this->{$this->textField} ?? '';
-    }
-
     /**
      * Get an excerpt of this entity's descriptive content to the specified length.
      */
     public function getExcerpt(int $length = 100): string
     {
-        $text = $this->getText();
+        $text = $this->{$this->textField} ?? '';
 
         if (mb_strlen($text) > $length) {
             $text = mb_substr($text, 0, $length - 3) . '...';
@@ -270,7 +262,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
      * This is the "static" parent and does not include dynamic
      * relations such as shelves to books.
      */
-    public function getParent(): ?Entity
+    public function getParent(): ?self
     {
         if ($this instanceof Page) {
             return $this->chapter_id ? $this->chapter()->withTrashed()->first() : $this->book()->withTrashed()->first();
@@ -300,7 +292,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     }
 
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function refreshSlug(): string
     {
@@ -310,7 +302,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     }
 
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function favourites(): MorphMany
     {

app/Entities/Models/Page.php

@@ -3,12 +3,13 @@
 namespace BookStack\Entities\Models;
 
 use BookStack\Entities\Tools\PageContent;
+use BookStack\Facades\Permissions;
 use BookStack\Uploads\Attachment;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
-use Permissions;
 
 /**
  * Class Page.
@@ -25,10 +26,12 @@ use Permissions;
  */
 class Page extends BookChild
 {
+    use HasFactory;
+
     public static $listAttributes = ['name', 'id', 'slug', 'book_id', 'chapter_id', 'draft', 'template', 'text', 'created_at', 'updated_at', 'priority'];
     public static $contentAttributes = ['name', 'id', 'slug', 'book_id', 'chapter_id', 'draft', 'template', 'html', 'text', 'created_at', 'updated_at', 'priority'];
 
-    protected $fillable = ['name', 'priority', 'markdown'];
+    protected $fillable = ['name', 'priority'];
 
     public $textField = 'text';
 
@@ -61,10 +64,8 @@ class Page extends BookChild
 
     /**
      * Check if this page has a chapter.
-     *
-     * @return bool
      */
-    public function hasChapter()
+    public function hasChapter(): bool
     {
         return $this->chapter()->count() > 0;
     }
@@ -103,7 +104,7 @@ class Page extends BookChild
     /**
      * Get the url of this page.
      */
-    public function getUrl($path = ''): string
+    public function getUrl(string $path = ''): string
     {
         $parts = [
             'books',
@@ -129,7 +130,7 @@ class Page extends BookChild
     /**
      * Get this page for JSON display.
      */
-    public function forJsonDisplay(): Page
+    public function forJsonDisplay(): self
     {
         $refreshed = $this->refresh()->unsetRelations()->load(['tags', 'createdBy', 'updatedBy', 'ownedBy']);
         $refreshed->setHidden(array_diff($refreshed->getHidden(), ['html', 'markdown']));

app/Entities/Models/PageRevision.php

@@ -22,6 +22,7 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
  * @property string $html
  * @property int    $revision_number
  * @property Page   $page
+ * @property-read ?User $createdBy
  */
 class PageRevision extends Model
 {

app/Entities/Repos/BookshelfRepo.php

@@ -124,7 +124,8 @@ class BookshelfRepo
 
         $syncData = Book::visible()
             ->whereIn('id', $bookIds)
-            ->get(['id'])->pluck('id')->mapWithKeys(function ($bookId) use ($numericIDs) {
+            ->pluck('id')
+            ->mapWithKeys(function ($bookId) use ($numericIDs) {
                 return [$bookId => ['order' => $numericIDs->search($bookId)]];
             });
 

app/Entities/Repos/PageRepo.php

@@ -157,8 +157,8 @@ class PageRepo
      */
     public function publishDraft(Page $draft, array $input): Page
     {
-        $this->baseRepo->update($draft, $input);
         $this->updateTemplateStatusAndContentFromInput($draft, $input);
+        $this->baseRepo->update($draft, $input);
 
         $draft->draft = false;
         $draft->revision_count = 1;
@@ -252,9 +252,7 @@ class PageRepo
     {
         // If the page itself is a draft simply update that
         if ($page->draft) {
-            if (isset($input['html'])) {
-                (new PageContent($page))->setNewHTML($input['html']);
-            }
+            $this->updateTemplateStatusAndContentFromInput($page, $input);
             $page->fill($input);
             $page->save();
 

app/Entities/Tools/PageContent.php

@@ -9,6 +9,7 @@ use BookStack\Exceptions\ImageUploadException;
 use BookStack\Facades\Theme;
 use BookStack\Theming\ThemeEvents;
 use BookStack\Uploads\ImageRepo;
+use BookStack\Uploads\ImageService;
 use BookStack\Util\HtmlContentFilter;
 use DOMDocument;
 use DOMNodeList;
@@ -37,7 +38,7 @@ class PageContent
      */
     public function setNewHTML(string $html)
     {
-        $html = $this->extractBase64Images($this->page, $html);
+        $html = $this->extractBase64ImagesFromHtml($html);
         $this->page->html = $this->formatHtml($html);
         $this->page->text = $this->toPlainText();
         $this->page->markdown = '';
@@ -48,6 +49,7 @@ class PageContent
      */
     public function setNewMarkdown(string $markdown)
     {
+        $markdown = $this->extractBase64ImagesFromMarkdown($markdown);
         $this->page->markdown = $markdown;
         $html = $this->markdownToHtml($markdown);
         $this->page->html = $this->formatHtml($html);
@@ -74,7 +76,7 @@ class PageContent
     /**
      * Convert all base64 image data to saved images.
      */
-    public function extractBase64Images(Page $page, string $htmlText): string
+    protected function extractBase64ImagesFromHtml(string $htmlText): string
     {
         if (empty($htmlText) || strpos($htmlText, 'data:image') === false) {
             return $htmlText;
@@ -85,31 +87,13 @@ class PageContent
         $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', '');
-            }
+            $newUrl = $this->base64ImageUriToUploadedImageUrl($imageSrc);
+            $imageNode->setAttribute('src', $newUrl);
         }
 
         // Generate inner html as a string
@@ -121,6 +105,70 @@ class PageContent
         return $html;
     }
 
+    /**
+     * Convert all inline base64 content to uploaded image files.
+     */
+    protected function extractBase64ImagesFromMarkdown(string $markdown)
+    {
+        $matches = [];
+        preg_match_all('/!\[.*?]\(.*?(data:image\/.*?)[)"\s]/', $markdown, $matches);
+
+        foreach ($matches[1] as $base64Match) {
+            $newUrl = $this->base64ImageUriToUploadedImageUrl($base64Match);
+            $markdown = str_replace($base64Match, $newUrl, $markdown);
+        }
+
+        return $markdown;
+    }
+
+    /**
+     * Parse the given base64 image URI and return the URL to the created image instance.
+     * Returns an empty string if the parsed URI is invalid or causes an error upon upload.
+     */
+    protected function base64ImageUriToUploadedImageUrl(string $uri): string
+    {
+        $imageRepo = app()->make(ImageRepo::class);
+        $imageInfo = $this->parseBase64ImageUri($uri);
+
+        // Validate extension and content
+        if (empty($imageInfo['data']) || !ImageService::isExtensionSupported($imageInfo['extension'])) {
+            return '';
+        }
+
+        // Validate that the content is not over our upload limit
+        $uploadLimitBytes = (config('app.upload_limit') * 1000000);
+        if (strlen($imageInfo['data']) > $uploadLimitBytes) {
+            return '';
+        }
+
+        // Save image from data with a random name
+        $imageName = 'embedded-image-' . Str::random(8) . '.' . $imageInfo['extension'];
+
+        try {
+            $image = $imageRepo->saveNewFromData($imageName, $imageInfo['data'], 'gallery', $this->page->id);
+        } catch (ImageUploadException $exception) {
+            return '';
+        }
+
+        return $image->url;
+    }
+
+    /**
+     * Parse a base64 image URI into the data and extension.
+     *
+     * @return array{extension: array, data: string}
+     */
+    protected function parseBase64ImageUri(string $uri): array
+    {
+        [$dataDefinition, $base64ImageData] = explode(',', $uri, 2);
+        $extension = strtolower(preg_split('/[\/;]/', $dataDefinition)[1] ?? '');
+
+        return [
+            'extension' => $extension,
+            'data'      => base64_decode($base64ImageData) ?: '',
+        ];
+    }
+
     /**
      * Formats a page's html to be tagged correctly within the system.
      */
@@ -342,7 +390,7 @@ class PageContent
      */
     protected function fetchSectionOfPage(Page $page, string $sectionId): string
     {
-        $topLevelTags = ['table', 'ul', 'ol'];
+        $topLevelTags = ['table', 'ul', 'ol', 'pre'];
         $doc = $this->loadDocumentFromHtml($page->html);
 
         // Search included content for the id given and blank out if not exists.

app/Entities/Tools/PageEditActivity.php

@@ -35,7 +35,13 @@ class PageEditActivity
         $pageDraftEdits = $this->activePageEditingQuery(60)->get();
         $count = $pageDraftEdits->count();
 
-        $userMessage = $count > 1 ? trans('entities.pages_draft_edit_active.start_a', ['count' => $count]) : trans('entities.pages_draft_edit_active.start_b', ['userName' => $pageDraftEdits->first()->createdBy->name]);
+        $userMessage = trans('entities.pages_draft_edit_active.start_a', ['count' => $count]);
+        if ($count === 1) {
+            /** @var PageRevision $firstDraft */
+            $firstDraft = $pageDraftEdits->first();
+            $userMessage = trans('entities.pages_draft_edit_active.start_b', ['userName' => $firstDraft->createdBy->name ?? '']);
+        }
+
         $timeMessage = trans('entities.pages_draft_edit_active.time_b', ['minCount'=> 60]);
 
         return trans('entities.pages_draft_edit_active.message', ['start' => $userMessage, 'time' => $timeMessage]);

app/Entities/Tools/SearchIndex.php

@@ -2,26 +2,31 @@
 
 namespace BookStack\Entities\Tools;
 
+use BookStack\Actions\Tag;
 use BookStack\Entities\EntityProvider;
 use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\Page;
 use BookStack\Entities\Models\SearchTerm;
+use DOMDocument;
+use DOMNode;
 use Illuminate\Support\Collection;
 
 class SearchIndex
 {
     /**
-     * @var SearchTerm
+     * A list of delimiter characters used to break-up parsed content into terms for indexing.
+     *
+     * @var string
      */
-    protected $searchTerm;
+    public static $delimiters = " \n\t.,!?:;()[]{}<>`'\"";
 
     /**
      * @var EntityProvider
      */
     protected $entityProvider;
 
-    public function __construct(SearchTerm $searchTerm, EntityProvider $entityProvider)
+    public function __construct(EntityProvider $entityProvider)
     {
-        $this->searchTerm = $searchTerm;
         $this->entityProvider = $entityProvider;
     }
 
@@ -31,14 +36,8 @@ class SearchIndex
     public function indexEntity(Entity $entity)
     {
         $this->deleteEntityTerms($entity);
-        $nameTerms = $this->generateTermArrayFromText($entity->name, 5 * $entity->searchFactor);
-        $bodyTerms = $this->generateTermArrayFromText($entity->getText(), 1 * $entity->searchFactor);
-        $terms = array_merge($nameTerms, $bodyTerms);
-        foreach ($terms as $index => $term) {
-            $terms[$index]['entity_type'] = $entity->getMorphClass();
-            $terms[$index]['entity_id'] = $entity->id;
-        }
-        $this->searchTerm->newQuery()->insert($terms);
+        $terms = $this->entityToTermDataArray($entity);
+        SearchTerm::query()->insert($terms);
     }
 
     /**
@@ -46,40 +45,54 @@ class SearchIndex
      *
      * @param Entity[] $entities
      */
-    protected function indexEntities(array $entities)
+    public function indexEntities(array $entities)
     {
         $terms = [];
         foreach ($entities as $entity) {
-            $nameTerms = $this->generateTermArrayFromText($entity->name, 5 * $entity->searchFactor);
-            $bodyTerms = $this->generateTermArrayFromText($entity->getText(), 1 * $entity->searchFactor);
-            foreach (array_merge($nameTerms, $bodyTerms) as $term) {
-                $term['entity_id'] = $entity->id;
-                $term['entity_type'] = $entity->getMorphClass();
-                $terms[] = $term;
-            }
+            $entityTerms = $this->entityToTermDataArray($entity);
+            array_push($terms, ...$entityTerms);
         }
 
         $chunkedTerms = array_chunk($terms, 500);
         foreach ($chunkedTerms as $termChunk) {
-            $this->searchTerm->newQuery()->insert($termChunk);
+            SearchTerm::query()->insert($termChunk);
         }
     }
 
     /**
      * Delete and re-index the terms for all entities in the system.
+     * Can take a callback which is used for reporting progress.
+     * Callback receives three arguments:
+     * - An instance of the model being processed
+     * - The number that have been processed so far.
+     * - The total number of that model to be processed.
+     *
+     * @param callable(Entity, int, int)|null $progressCallback
      */
-    public function indexAllEntities()
+    public function indexAllEntities(?callable $progressCallback = null)
     {
-        $this->searchTerm->newQuery()->truncate();
+        SearchTerm::query()->truncate();
 
         foreach ($this->entityProvider->all() as $entityModel) {
-            $selectFields = ['id', 'name', $entityModel->textField];
+            $indexContentField = $entityModel instanceof Page ? 'html' : 'description';
+            $selectFields = ['id', 'name', $indexContentField];
+            $total = $entityModel->newQuery()->withTrashed()->count();
+            $chunkSize = 250;
+            $processed = 0;
+
+            $chunkCallback = function (Collection $entities) use ($progressCallback, &$processed, $total, $chunkSize, $entityModel) {
+                $this->indexEntities($entities->all());
+                $processed = min($processed + $chunkSize, $total);
+
+                if (is_callable($progressCallback)) {
+                    $progressCallback($entityModel, $processed, $total);
+                }
+            };
+
             $entityModel->newQuery()
-                ->withTrashed()
                 ->select($selectFields)
-                ->chunk(1000, function (Collection $entities) {
-                    $this->indexEntities($entities->all());
-                });
+                ->with(['tags:id,name,value,entity_id,entity_type'])
+                ->chunk($chunkSize, $chunkCallback);
         }
     }
 
@@ -92,12 +105,97 @@ class SearchIndex
     }
 
     /**
-     * Create a scored term array from the given text.
+     * Create a scored term array from the given text, where the keys are the terms
+     * and the values are their scores.
+     *
+     * @returns array<string, int>
      */
-    protected function generateTermArrayFromText(string $text, int $scoreAdjustment = 1): array
+    protected function generateTermScoreMapFromText(string $text, int $scoreAdjustment = 1): array
+    {
+        $termMap = $this->textToTermCountMap($text);
+
+        foreach ($termMap as $term => $count) {
+            $termMap[$term] = $count * $scoreAdjustment;
+        }
+
+        return $termMap;
+    }
+
+    /**
+     * Create a scored term array from the given HTML, where the keys are the terms
+     * and the values are their scores.
+     *
+     * @returns array<string, int>
+     */
+    protected function generateTermScoreMapFromHtml(string $html): array
+    {
+        if (empty($html)) {
+            return [];
+        }
+
+        $scoresByTerm = [];
+        $elementScoreAdjustmentMap = [
+            'h1' => 10,
+            'h2' => 5,
+            'h3' => 4,
+            'h4' => 3,
+            'h5' => 2,
+            'h6' => 1.5,
+        ];
+
+        $html = '<body>' . $html . '</body>';
+        libxml_use_internal_errors(true);
+        $doc = new DOMDocument();
+        $doc->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
+
+        $topElems = $doc->documentElement->childNodes->item(0)->childNodes;
+        /** @var DOMNode $child */
+        foreach ($topElems as $child) {
+            $nodeName = $child->nodeName;
+            $termCounts = $this->textToTermCountMap(trim($child->textContent));
+            foreach ($termCounts as $term => $count) {
+                $scoreChange = $count * ($elementScoreAdjustmentMap[$nodeName] ?? 1);
+                $scoresByTerm[$term] = ($scoresByTerm[$term] ?? 0) + $scoreChange;
+            }
+        }
+
+        return $scoresByTerm;
+    }
+
+    /**
+     * Create a scored term map from the given set of entity tags.
+     *
+     * @param Tag[] $tags
+     *
+     * @returns array<string, int>
+     */
+    protected function generateTermScoreMapFromTags(array $tags): array
+    {
+        $scoreMap = [];
+        $names = [];
+        $values = [];
+
+        foreach ($tags as $tag) {
+            $names[] = $tag->name;
+            $values[] = $tag->value;
+        }
+
+        $nameMap = $this->generateTermScoreMapFromText(implode(' ', $names), 3);
+        $valueMap = $this->generateTermScoreMapFromText(implode(' ', $values), 5);
+
+        return $this->mergeTermScoreMaps($nameMap, $valueMap);
+    }
+
+    /**
+     * For the given text, return an array where the keys are the unique term words
+     * and the values are the frequency of that term.
+     *
+     * @returns array<string, int>
+     */
+    protected function textToTermCountMap(string $text): array
     {
         $tokenMap = []; // {TextToken => OccurrenceCount}
-        $splitChars = " \n\t.,!?:;()[]{}<>`'\"";
+        $splitChars = static::$delimiters;
         $token = strtok($text, $splitChars);
 
         while ($token !== false) {
@@ -108,14 +206,61 @@ class SearchIndex
             $token = strtok($splitChars);
         }
 
-        $terms = [];
-        foreach ($tokenMap as $token => $count) {
-            $terms[] = [
-                'term'  => $token,
-                'score' => $count * $scoreAdjustment,
+        return $tokenMap;
+    }
+
+    /**
+     * For the given entity, Generate an array of term data details.
+     * Is the raw term data, not instances of SearchTerm models.
+     *
+     * @returns array{term: string, score: float, entity_id: int, entity_type: string}[]
+     */
+    protected function entityToTermDataArray(Entity $entity): array
+    {
+        $nameTermsMap = $this->generateTermScoreMapFromText($entity->name, 40 * $entity->searchFactor);
+        $tagTermsMap = $this->generateTermScoreMapFromTags($entity->tags->all());
+
+        if ($entity instanceof Page) {
+            $bodyTermsMap = $this->generateTermScoreMapFromHtml($entity->html);
+        } else {
+            $bodyTermsMap = $this->generateTermScoreMapFromText($entity->description ?? '', $entity->searchFactor);
+        }
+
+        $mergedScoreMap = $this->mergeTermScoreMaps($nameTermsMap, $bodyTermsMap, $tagTermsMap);
+
+        $dataArray = [];
+        $entityId = $entity->id;
+        $entityType = $entity->getMorphClass();
+        foreach ($mergedScoreMap as $term => $score) {
+            $dataArray[] = [
+                'term'        => $term,
+                'score'       => $score,
+                'entity_type' => $entityType,
+                'entity_id'   => $entityId,
             ];
         }
 
-        return $terms;
+        return $dataArray;
+    }
+
+    /**
+     * For the given term data arrays, Merge their contents by term
+     * while combining any scores.
+     *
+     * @param array<string, int>[] ...$scoreMaps
+     *
+     * @returns array<string, int>
+     */
+    protected function mergeTermScoreMaps(...$scoreMaps): array
+    {
+        $mergedMap = [];
+
+        foreach ($scoreMaps as $scoreMap) {
+            foreach ($scoreMap as $term => $score) {
+                $mergedMap[$term] = ($mergedMap[$term] ?? 0) + $score;
+            }
+        }
+
+        return $mergedMap;
     }
 }

app/Entities/Tools/SearchOptions.php

@@ -29,10 +29,10 @@ class SearchOptions
     /**
      * Create a new instance from a search string.
      */
-    public static function fromString(string $search): SearchOptions
+    public static function fromString(string $search): self
     {
         $decoded = static::decode($search);
-        $instance = new static();
+        $instance = new SearchOptions();
         foreach ($decoded as $type => $value) {
             $instance->$type = $value;
         }
@@ -45,7 +45,7 @@ class SearchOptions
      * Will look for a classic string term and use that
      * Otherwise we'll use the details from an advanced search form.
      */
-    public static function fromRequest(Request $request): SearchOptions
+    public static function fromRequest(Request $request): self
     {
         if (!$request->has('search') && !$request->has('term')) {
             return static::fromString('');
@@ -55,17 +55,24 @@ class SearchOptions
             return static::fromString($request->get('term'));
         }
 
-        $instance = new static();
+        $instance = new SearchOptions();
         $inputs = $request->only(['search', 'types', 'filters', 'exact', 'tags']);
-        $instance->searches = explode(' ', $inputs['search'] ?? []);
-        $instance->exacts = array_filter($inputs['exact'] ?? []);
+
+        $parsedStandardTerms = static::parseStandardTermString($inputs['search'] ?? '');
+        $instance->searches = $parsedStandardTerms['terms'];
+        $instance->exacts = $parsedStandardTerms['exacts'];
+
+        array_push($instance->exacts, ...array_filter($inputs['exact'] ?? []));
+
         $instance->tags = array_filter($inputs['tags'] ?? []);
+
         foreach (($inputs['filters'] ?? []) as $filterKey => $filterVal) {
             if (empty($filterVal)) {
                 continue;
             }
             $instance->filters[$filterKey] = $filterVal === 'true' ? '' : $filterVal;
         }
+
         if (isset($inputs['types']) && count($inputs['types']) < 4) {
             $instance->filters['type'] = implode('|', $inputs['types']);
         }
@@ -102,11 +109,9 @@ class SearchOptions
         }
 
         // Parse standard terms
-        foreach (explode(' ', trim($searchString)) as $searchTerm) {
-            if ($searchTerm !== '') {
-                $terms['searches'][] = $searchTerm;
-            }
-        }
+        $parsedStandardTerms = static::parseStandardTermString($searchString);
+        array_push($terms['searches'], ...$parsedStandardTerms['terms']);
+        array_push($terms['exacts'], ...$parsedStandardTerms['exacts']);
 
         // Split filter values out
         $splitFilters = [];
@@ -119,6 +124,33 @@ class SearchOptions
         return $terms;
     }
 
+    /**
+     * Parse a standard search term string into individual search terms and
+     * extract any exact terms searches to be made.
+     *
+     * @return array{terms: array<string>, exacts: array<string>}
+     */
+    protected static function parseStandardTermString(string $termString): array
+    {
+        $terms = explode(' ', $termString);
+        $indexDelimiters = SearchIndex::$delimiters;
+        $parsed = [
+            'terms'  => [],
+            'exacts' => [],
+        ];
+
+        foreach ($terms as $searchTerm) {
+            if ($searchTerm === '') {
+                continue;
+            }
+
+            $parsedList = (strpbrk($searchTerm, $indexDelimiters) === false) ? 'terms' : 'exacts';
+            $parsed[$parsedList][] = $searchTerm;
+        }
+
+        return $parsed;
+    }
+
     /**
      * Encode this instance to a search string.
      */

app/Entities/Tools/SearchResultsFormatter.php

@@ -0,0 +1,236 @@
+<?php
+
+namespace BookStack\Entities\Tools;
+
+use BookStack\Actions\Tag;
+use BookStack\Entities\Models\Entity;
+use Illuminate\Support\HtmlString;
+
+class SearchResultsFormatter
+{
+    /**
+     * For the given array of entities, Prepare the models to be shown in search result
+     * output. This sets a series of additional attributes.
+     *
+     * @param Entity[] $results
+     */
+    public function format(array $results, SearchOptions $options): void
+    {
+        foreach ($results as $result) {
+            $this->setSearchPreview($result, $options);
+        }
+    }
+
+    /**
+     * Update the given entity model to set attributes used for previews of the item
+     * primarily within search result lists.
+     */
+    protected function setSearchPreview(Entity $entity, SearchOptions $options)
+    {
+        $textProperty = $entity->textField;
+        $textContent = $entity->$textProperty;
+        $terms = array_merge($options->exacts, $options->searches);
+
+        $originalContentByNewAttribute = [
+            'preview_name'    => $entity->name,
+            'preview_content' => $textContent,
+        ];
+
+        foreach ($originalContentByNewAttribute as $attributeName => $content) {
+            $targetLength = ($attributeName === 'preview_name') ? 0 : 260;
+            $matchRefs = $this->getMatchPositions($content, $terms);
+            $mergedRefs = $this->sortAndMergeMatchPositions($matchRefs);
+            $formatted = $this->formatTextUsingMatchPositions($mergedRefs, $content, $targetLength);
+            $entity->setAttribute($attributeName, new HtmlString($formatted));
+        }
+
+        $tags = $entity->relationLoaded('tags') ? $entity->tags->all() : [];
+        $this->highlightTagsContainingTerms($tags, $terms);
+    }
+
+    /**
+     * Highlight tags which match the given terms.
+     *
+     * @param Tag[]    $tags
+     * @param string[] $terms
+     */
+    protected function highlightTagsContainingTerms(array $tags, array $terms): void
+    {
+        foreach ($tags as $tag) {
+            $tagName = strtolower($tag->name);
+            $tagValue = strtolower($tag->value);
+
+            foreach ($terms as $term) {
+                $termLower = strtolower($term);
+
+                if (strpos($tagName, $termLower) !== false) {
+                    $tag->setAttribute('highlight_name', true);
+                }
+
+                if (strpos($tagValue, $termLower) !== false) {
+                    $tag->setAttribute('highlight_value', true);
+                }
+            }
+        }
+    }
+
+    /**
+     * Get positions of the given terms within the given text.
+     * Is in the array format of [int $startIndex => int $endIndex] where the indexes
+     * are positions within the provided text.
+     *
+     * @return array<int, int>
+     */
+    protected function getMatchPositions(string $text, array $terms): array
+    {
+        $matchRefs = [];
+        $text = strtolower($text);
+
+        foreach ($terms as $term) {
+            $offset = 0;
+            $term = strtolower($term);
+            $pos = strpos($text, $term, $offset);
+            while ($pos !== false) {
+                $end = $pos + strlen($term);
+                $matchRefs[$pos] = $end;
+                $offset = $end;
+                $pos = strpos($text, $term, $offset);
+            }
+        }
+
+        return $matchRefs;
+    }
+
+    /**
+     * Sort the given match positions before merging them where they're
+     * adjacent or where they overlap.
+     *
+     * @param array<int, int> $matchPositions
+     *
+     * @return array<int, int>
+     */
+    protected function sortAndMergeMatchPositions(array $matchPositions): array
+    {
+        ksort($matchPositions);
+        $mergedRefs = [];
+        $lastStart = 0;
+        $lastEnd = 0;
+
+        foreach ($matchPositions as $start => $end) {
+            if ($start > $lastEnd) {
+                $mergedRefs[$start] = $end;
+                $lastStart = $start;
+                $lastEnd = $end;
+            } elseif ($end > $lastEnd) {
+                $mergedRefs[$lastStart] = $end;
+                $lastEnd = $end;
+            }
+        }
+
+        return $mergedRefs;
+    }
+
+    /**
+     * Format the given original text, returning a version where terms are highlighted within.
+     * Returned content is in HTML text format.
+     * A given $targetLength of 0 asserts no target length limit.
+     *
+     * This is a complex function but written to be relatively efficient, going through the term matches in order
+     * so that we're only doing a one-time loop through of the matches. There is no further searching
+     * done within here.
+     */
+    protected function formatTextUsingMatchPositions(array $matchPositions, string $originalText, int $targetLength): string
+    {
+        $maxEnd = strlen($originalText);
+        $fetchAll = ($targetLength === 0);
+        $contextLength = ($fetchAll ? 0 : 32);
+
+        $firstStart = null;
+        $lastEnd = 0;
+        $content = '';
+        $contentTextLength = 0;
+
+        if ($fetchAll) {
+            $targetLength = $maxEnd * 2;
+        }
+
+        foreach ($matchPositions as $start => $end) {
+            // Get our outer text ranges for the added context we want to show upon the result.
+            $contextStart = max($start - $contextLength, 0, $lastEnd);
+            $contextEnd = min($end + $contextLength, $maxEnd);
+
+            // Adjust the start if we're going to be touching the previous match.
+            $startDiff = $start - $lastEnd;
+            if ($startDiff < 0) {
+                $contextStart = $start;
+                // Trims off '$startDiff' number of characters to bring it back to the start
+                // if this current match zone.
+                $content = substr($content, 0, strlen($content) + $startDiff);
+                $contentTextLength += $startDiff;
+            }
+
+            // Add ellipsis between results
+            if (!$fetchAll && $contextStart !== 0 && $contextStart !== $start) {
+                $content .= ' ...';
+                $contentTextLength += 4;
+            } elseif ($fetchAll) {
+                // Or fill in gap since the previous match
+                $fillLength = $contextStart - $lastEnd;
+                $content .= e(substr($originalText, $lastEnd, $fillLength));
+                $contentTextLength += $fillLength;
+            }
+
+            // Add our content including the bolded matching text
+            $content .= e(substr($originalText, $contextStart, $start - $contextStart));
+            $contentTextLength += $start - $contextStart;
+            $content .= '<strong>' . e(substr($originalText, $start, $end - $start)) . '</strong>';
+            $contentTextLength += $end - $start;
+            $content .= e(substr($originalText, $end, $contextEnd - $end));
+            $contentTextLength += $contextEnd - $end;
+
+            // Update our last end position
+            $lastEnd = $contextEnd;
+
+            // Update the first start position if it's not already been set
+            if (is_null($firstStart)) {
+                $firstStart = $contextStart;
+            }
+
+            // Stop if we're near our target
+            if ($contentTextLength >= $targetLength - 10) {
+                break;
+            }
+        }
+
+        // Just copy out the content if we haven't moved along anywhere.
+        if ($lastEnd === 0) {
+            $content = e(substr($originalText, 0, $targetLength));
+            $contentTextLength = $targetLength;
+            $lastEnd = $targetLength;
+        }
+
+        // Pad out the end if we're low
+        $remainder = $targetLength - $contentTextLength;
+        if ($remainder > 10) {
+            $padEndLength = min($maxEnd - $lastEnd, $remainder);
+            $content .= e(substr($originalText, $lastEnd, $padEndLength));
+            $lastEnd += $padEndLength;
+            $contentTextLength += $padEndLength;
+        }
+
+        // Pad out the start if we're still low
+        $remainder = $targetLength - $contentTextLength;
+        $firstStart = $firstStart ?: 0;
+        if (!$fetchAll && $remainder > 10 && $firstStart !== 0) {
+            $padStart = max(0, $firstStart - $remainder);
+            $content = ($padStart === 0 ? '' : '...') . e(substr($originalText, $padStart, $firstStart - $padStart)) . substr($content, 4);
+        }
+
+        // Add ellipsis if we're not at the end
+        if ($lastEnd < $maxEnd) {
+            $content .= '...';
+        }
+
+        return $content;
+    }
+}

app/Entities/Tools/SearchRunner.php

@@ -5,13 +5,18 @@ namespace BookStack\Entities\Tools;
 use BookStack\Auth\Permissions\PermissionService;
 use BookStack\Auth\User;
 use BookStack\Entities\EntityProvider;
+use BookStack\Entities\Models\BookChild;
 use BookStack\Entities\Models\Entity;
-use Illuminate\Database\Connection;
+use BookStack\Entities\Models\Page;
+use BookStack\Entities\Models\SearchTerm;
 use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
+use Illuminate\Database\Eloquent\Collection as EloquentCollection;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Query\Builder;
-use Illuminate\Database\Query\JoinClause;
 use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Str;
+use SplObjectStorage;
 
 class SearchRunner
 {
@@ -20,11 +25,6 @@ class SearchRunner
      */
     protected $entityProvider;
 
-    /**
-     * @var Connection
-     */
-    protected $db;
-
     /**
      * @var PermissionService
      */
@@ -37,17 +37,27 @@ class SearchRunner
      */
     protected $queryOperators = ['<=', '>=', '=', '<', '>', 'like', '!='];
 
-    public function __construct(EntityProvider $entityProvider, Connection $db, PermissionService $permissionService)
+    /**
+     * Retain a cache of score adjusted terms for specific search options.
+     * From PHP>=8 this can be made into a WeakMap instead.
+     *
+     * @var SplObjectStorage
+     */
+    protected $termAdjustmentCache;
+
+    public function __construct(EntityProvider $entityProvider, PermissionService $permissionService)
     {
         $this->entityProvider = $entityProvider;
-        $this->db = $db;
         $this->permissionService = $permissionService;
+        $this->termAdjustmentCache = new SplObjectStorage();
     }
 
     /**
      * Search all entities in the system.
      * The provided count is for each entity to search,
-     * Total returned could can be larger and not guaranteed.
+     * Total returned could be larger and not guaranteed.
+     *
+     * @return array{total: int, count: int, has_more: bool, results: Entity[]}
      */
     public function searchEntities(SearchOptions $searchOpts, string $entityType = 'all', int $page = 1, int $count = 20, string $action = 'view'): array
     {
@@ -68,13 +78,18 @@ class SearchRunner
             if (!in_array($entityType, $entityTypes)) {
                 continue;
             }
-            $search = $this->searchEntityTable($searchOpts, $entityType, $page, $count, $action);
-            $entityTotal = $this->searchEntityTable($searchOpts, $entityType, $page, $count, $action, true);
-            if ($entityTotal > $page * $count) {
+
+            $entityModelInstance = $this->entityProvider->get($entityType);
+            $searchQuery = $this->buildQuery($searchOpts, $entityModelInstance, $action);
+            $entityTotal = $searchQuery->count();
+            $searchResults = $this->getPageOfDataFromQuery($searchQuery, $entityModelInstance, $page, $count);
+
+            if ($entityTotal > ($page * $count)) {
                 $hasMore = true;
             }
+
             $total += $entityTotal;
-            $results = $results->merge($search);
+            $results = $results->merge($searchResults);
         }
 
         return [
@@ -99,7 +114,9 @@ class SearchRunner
             if (!in_array($entityType, $entityTypes)) {
                 continue;
             }
-            $search = $this->buildEntitySearchQuery($opts, $entityType)->where('book_id', '=', $bookId)->take(20)->get();
+
+            $entityModelInstance = $this->entityProvider->get($entityType);
+            $search = $this->buildQuery($opts, $entityModelInstance)->where('book_id', '=', $bookId)->take(20)->get();
             $results = $results->merge($search);
         }
 
@@ -112,78 +129,199 @@ class SearchRunner
     public function searchChapter(int $chapterId, string $searchString): Collection
     {
         $opts = SearchOptions::fromString($searchString);
-        $pages = $this->buildEntitySearchQuery($opts, 'page')->where('chapter_id', '=', $chapterId)->take(20)->get();
+        $entityModelInstance = $this->entityProvider->get('page');
+        $pages = $this->buildQuery($opts, $entityModelInstance)->where('chapter_id', '=', $chapterId)->take(20)->get();
 
         return $pages->sortByDesc('score');
     }
 
     /**
-     * Search across a particular entity type.
-     * Setting getCount = true will return the total
-     * matching instead of the items themselves.
-     *
-     * @return \Illuminate\Database\Eloquent\Collection|int|static[]
+     * Get a page of result data from the given query based on the provided page parameters.
      */
-    protected function searchEntityTable(SearchOptions $searchOpts, string $entityType = 'page', int $page = 1, int $count = 20, string $action = 'view', bool $getCount = false)
+    protected function getPageOfDataFromQuery(EloquentBuilder $query, Entity $entityModelInstance, int $page = 1, int $count = 20): EloquentCollection
     {
-        $query = $this->buildEntitySearchQuery($searchOpts, $entityType, $action);
-        if ($getCount) {
-            return $query->count();
+        $relations = ['tags'];
+
+        if ($entityModelInstance instanceof BookChild) {
+            $relations['book'] = function (BelongsTo $query) {
+                $query->visible();
+            };
         }
 
-        $query = $query->skip(($page - 1) * $count)->take($count);
+        if ($entityModelInstance instanceof Page) {
+            $relations['chapter'] = function (BelongsTo $query) {
+                $query->visible();
+            };
+        }
 
-        return $query->get();
+        return $query->clone()
+            ->with(array_filter($relations))
+            ->skip(($page - 1) * $count)
+            ->take($count)
+            ->get();
     }
 
     /**
      * Create a search query for an entity.
      */
-    protected function buildEntitySearchQuery(SearchOptions $searchOpts, string $entityType = 'page', string $action = 'view'): EloquentBuilder
+    protected function buildQuery(SearchOptions $searchOpts, Entity $entityModelInstance, string $action = 'view'): EloquentBuilder
     {
-        $entity = $this->entityProvider->get($entityType);
-        $entitySelect = $entity->newQuery();
+        $entityQuery = $entityModelInstance->newQuery();
+
+        if ($entityModelInstance instanceof Page) {
+            $entityQuery->select($entityModelInstance::$listAttributes);
+        } else {
+            $entityQuery->select(['*']);
+        }
 
         // Handle normal search terms
-        if (count($searchOpts->searches) > 0) {
-            $rawScoreSum = $this->db->raw('SUM(score) as score');
-            $subQuery = $this->db->table('search_terms')->select('entity_id', 'entity_type', $rawScoreSum);
-            $subQuery->where('entity_type', '=', $entity->getMorphClass());
-            $subQuery->where(function (Builder $query) use ($searchOpts) {
-                foreach ($searchOpts->searches as $inputTerm) {
-                    $query->orWhere('term', 'like', $inputTerm . '%');
-                }
-            })->groupBy('entity_type', 'entity_id');
-            $entitySelect->join($this->db->raw('(' . $subQuery->toSql() . ') as s'), function (JoinClause $join) {
-                $join->on('id', '=', 'entity_id');
-            })->addSelect($entity->getTable() . '.*')
-                ->selectRaw('s.score')
-                ->orderBy('score', 'desc');
-            $entitySelect->mergeBindings($subQuery);
-        }
+        $this->applyTermSearch($entityQuery, $searchOpts, $entityModelInstance);
 
         // Handle exact term matching
         foreach ($searchOpts->exacts as $inputTerm) {
-            $entitySelect->where(function (EloquentBuilder $query) use ($inputTerm, $entity) {
+            $entityQuery->where(function (EloquentBuilder $query) use ($inputTerm, $entityModelInstance) {
                 $query->where('name', 'like', '%' . $inputTerm . '%')
-                    ->orWhere($entity->textField, 'like', '%' . $inputTerm . '%');
+                    ->orWhere($entityModelInstance->textField, 'like', '%' . $inputTerm . '%');
             });
         }
 
         // Handle tag searches
         foreach ($searchOpts->tags as $inputTerm) {
-            $this->applyTagSearch($entitySelect, $inputTerm);
+            $this->applyTagSearch($entityQuery, $inputTerm);
         }
 
         // Handle filters
         foreach ($searchOpts->filters as $filterTerm => $filterValue) {
             $functionName = Str::camel('filter_' . $filterTerm);
             if (method_exists($this, $functionName)) {
-                $this->$functionName($entitySelect, $entity, $filterValue);
+                $this->$functionName($entityQuery, $entityModelInstance, $filterValue);
             }
         }
 
-        return $this->permissionService->enforceEntityRestrictions($entity, $entitySelect, $action);
+        return $this->permissionService->enforceEntityRestrictions($entityModelInstance, $entityQuery, $action);
+    }
+
+    /**
+     * For the given search query, apply the queries for handling the regular search terms.
+     */
+    protected function applyTermSearch(EloquentBuilder $entityQuery, SearchOptions $options, Entity $entity): void
+    {
+        $terms = $options->searches;
+        if (count($terms) === 0) {
+            return;
+        }
+
+        $scoredTerms = $this->getTermAdjustments($options);
+        $scoreSelect = $this->selectForScoredTerms($scoredTerms);
+
+        $subQuery = DB::table('search_terms')->select([
+            'entity_id',
+            'entity_type',
+            DB::raw($scoreSelect['statement']),
+        ]);
+
+        $subQuery->addBinding($scoreSelect['bindings'], 'select');
+
+        $subQuery->where('entity_type', '=', $entity->getMorphClass());
+        $subQuery->where(function (Builder $query) use ($terms) {
+            foreach ($terms as $inputTerm) {
+                $query->orWhere('term', 'like', $inputTerm . '%');
+            }
+        });
+        $subQuery->groupBy('entity_type', 'entity_id');
+
+        $entityQuery->joinSub($subQuery, 's', 'id', '=', 'entity_id');
+        $entityQuery->addSelect('s.score');
+        $entityQuery->orderBy('score', 'desc');
+    }
+
+    /**
+     * Create a select statement, with prepared bindings, for the given
+     * set of scored search terms.
+     *
+     * @param array<string, float> $scoredTerms
+     *
+     * @return array{statement: string, bindings: string[]}
+     */
+    protected function selectForScoredTerms(array $scoredTerms): array
+    {
+        // Within this we walk backwards to create the chain of 'if' statements
+        // so that each previous statement is used in the 'else' condition of
+        // the next (earlier) to be built. We start at '0' to have no score
+        // on no match (Should never actually get to this case).
+        $ifChain = '0';
+        $bindings = [];
+        foreach ($scoredTerms as $term => $score) {
+            $ifChain = 'IF(term like ?, score * ' . (float) $score . ', ' . $ifChain . ')';
+            $bindings[] = $term . '%';
+        }
+
+        return [
+            'statement' => 'SUM(' . $ifChain . ') as score',
+            'bindings'  => array_reverse($bindings),
+        ];
+    }
+
+    /**
+     * For the terms in the given search options, query their popularity across all
+     * search terms then provide that back as score adjustment multiplier applicable
+     * for their rarity. Returns an array of float multipliers, keyed by term.
+     *
+     * @return array<string, float>
+     */
+    protected function getTermAdjustments(SearchOptions $options): array
+    {
+        if (isset($this->termAdjustmentCache[$options])) {
+            return $this->termAdjustmentCache[$options];
+        }
+
+        $termQuery = SearchTerm::query()->toBase();
+        $whenStatements = [];
+        $whenBindings = [];
+
+        foreach ($options->searches as $term) {
+            $whenStatements[] = 'WHEN term LIKE ? THEN ?';
+            $whenBindings[] = $term . '%';
+            $whenBindings[] = $term;
+
+            $termQuery->orWhere('term', 'like', $term . '%');
+        }
+
+        $case = 'CASE ' . implode(' ', $whenStatements) . ' END';
+        $termQuery->selectRaw($case . ' as term', $whenBindings);
+        $termQuery->selectRaw('COUNT(*) as count');
+        $termQuery->groupByRaw($case, $whenBindings);
+
+        $termCounts = $termQuery->pluck('count', 'term')->toArray();
+        $adjusted = $this->rawTermCountsToAdjustments($termCounts);
+
+        $this->termAdjustmentCache[$options] = $adjusted;
+
+        return $this->termAdjustmentCache[$options];
+    }
+
+    /**
+     * Convert counts of terms into a relative-count normalised multiplier.
+     *
+     * @param array<string, int> $termCounts
+     *
+     * @return array<string, int>
+     */
+    protected function rawTermCountsToAdjustments(array $termCounts): array
+    {
+        if (empty($termCounts)) {
+            return [];
+        }
+
+        $multipliers = [];
+        $max = max(array_values($termCounts));
+
+        foreach ($termCounts as $term => $count) {
+            $percent = round($count / $max, 5);
+            $multipliers[$term] = 1.3 - $percent;
+        }
+
+        return $multipliers;
     }
 
     /**
@@ -196,7 +334,7 @@ class SearchRunner
             $escapedOperators[] = preg_quote($operator);
         }
 
-        return join('|', $escapedOperators);
+        return implode('|', $escapedOperators);
     }
 
     /**
@@ -234,44 +372,40 @@ class SearchRunner
     /**
      * Custom entity search filters.
      */
-    protected function filterUpdatedAfter(EloquentBuilder $query, Entity $model, $input)
+    protected function filterUpdatedAfter(EloquentBuilder $query, Entity $model, $input): void
     {
         try {
             $date = date_create($input);
+            $query->where('updated_at', '>=', $date);
         } catch (\Exception $e) {
-            return;
         }
-        $query->where('updated_at', '>=', $date);
     }
 
-    protected function filterUpdatedBefore(EloquentBuilder $query, Entity $model, $input)
+    protected function filterUpdatedBefore(EloquentBuilder $query, Entity $model, $input): void
     {
         try {
             $date = date_create($input);
+            $query->where('updated_at', '<', $date);
         } catch (\Exception $e) {
-            return;
         }
-        $query->where('updated_at', '<', $date);
     }
 
-    protected function filterCreatedAfter(EloquentBuilder $query, Entity $model, $input)
+    protected function filterCreatedAfter(EloquentBuilder $query, Entity $model, $input): void
     {
         try {
             $date = date_create($input);
+            $query->where('created_at', '>=', $date);
         } catch (\Exception $e) {
-            return;
         }
-        $query->where('created_at', '>=', $date);
     }
 
     protected function filterCreatedBefore(EloquentBuilder $query, Entity $model, $input)
     {
         try {
             $date = date_create($input);
+            $query->where('created_at', '<', $date);
         } catch (\Exception $e) {
-            return;
         }
-        $query->where('created_at', '<', $date);
     }
 
     protected function filterCreatedBy(EloquentBuilder $query, Entity $model, $input)
@@ -348,9 +482,9 @@ class SearchRunner
      */
     protected function sortByLastCommented(EloquentBuilder $query, Entity $model)
     {
-        $commentsTable = $this->db->getTablePrefix() . 'comments';
+        $commentsTable = DB::getTablePrefix() . 'comments';
         $morphClass = str_replace('\\', '\\\\', $model->getMorphClass());
-        $commentQuery = $this->db->raw('(SELECT c1.entity_id, c1.entity_type, c1.created_at as last_commented FROM ' . $commentsTable . ' c1 LEFT JOIN ' . $commentsTable . ' c2 ON (c1.entity_id = c2.entity_id AND c1.entity_type = c2.entity_type AND c1.created_at < c2.created_at) WHERE c1.entity_type = \'' . $morphClass . '\' AND c2.created_at IS NULL) as comments');
+        $commentQuery = DB::raw('(SELECT c1.entity_id, c1.entity_type, c1.created_at as last_commented FROM ' . $commentsTable . ' c1 LEFT JOIN ' . $commentsTable . ' c2 ON (c1.entity_id = c2.entity_id AND c1.entity_type = c2.entity_type AND c1.created_at < c2.created_at) WHERE c1.entity_type = \'' . $morphClass . '\' AND c2.created_at IS NULL) as comments');
 
         $query->join($commentQuery, $model->getTable() . '.id', '=', 'comments.entity_id')->orderBy('last_commented', 'desc');
     }

app/Entities/Tools/SiblingFetcher.php

@@ -5,6 +5,7 @@ namespace BookStack\Entities\Tools;
 use BookStack\Entities\EntityProvider;
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Bookshelf;
+use BookStack\Entities\Models\Page;
 use Illuminate\Support\Collection;
 
 class SiblingFetcher
@@ -18,18 +19,18 @@ class SiblingFetcher
         $entities = [];
 
         // Page in chapter
-        if ($entity->isA('page') && $entity->chapter) {
+        if ($entity instanceof Page && $entity->chapter) {
             $entities = $entity->chapter->getVisiblePages();
         }
 
         // Page in book or chapter
-        if (($entity->isA('page') && !$entity->chapter) || $entity->isA('chapter')) {
+        if (($entity instanceof Page && !$entity->chapter) || $entity->isA('chapter')) {
             $entities = $entity->book->getDirectChildren();
         }
 
         // Book
         // Gets just the books in a shelf if shelf is in context
-        if ($entity->isA('book')) {
+        if ($entity instanceof Book) {
             $contextShelf = (new ShelfContext())->getContextualShelfForBook($entity);
             if ($contextShelf) {
                 $entities = $contextShelf->visibleBooks()->get();
@@ -38,8 +39,8 @@ class SiblingFetcher
             }
         }
 
-        // Shelve
-        if ($entity->isA('bookshelf')) {
+        // Shelf
+        if ($entity instanceof Bookshelf) {
             $entities = Bookshelf::visible()->get();
         }
 

app/Entities/Tools/SlugGenerator.php

@@ -4,13 +4,14 @@ namespace BookStack\Entities\Tools;
 
 use BookStack\Entities\Models\BookChild;
 use BookStack\Interfaces\Sluggable;
+use BookStack\Model;
 use Illuminate\Support\Str;
 
 class SlugGenerator
 {
     /**
      * Generate a fresh slug for the given entity.
-     * The slug will generated so it does not conflict within the same parent item.
+     * The slug will be generated so that it doesn't conflict within the same parent item.
      */
     public function generate(Sluggable $model): string
     {
@@ -38,6 +39,8 @@ class SlugGenerator
     /**
      * Check if a slug is already in-use for this
      * type of model within the same parent.
+     *
+     * @param Sluggable&Model $model
      */
     protected function slugInUse(string $slug, Sluggable $model): bool
     {

app/Entities/Tools/TrashCan.php

@@ -323,6 +323,8 @@ class TrashCan
         if ($entity instanceof Bookshelf) {
             return $this->destroyShelf($entity);
         }
+
+        return 0;
     }
 
     /**

app/Exceptions/Handler.php

@@ -9,6 +9,7 @@ use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Validation\ValidationException;
 use Symfony\Component\HttpKernel\Exception\HttpException;
+use Throwable;
 
 class Handler extends ExceptionHandler
 {
@@ -27,6 +28,7 @@ class Handler extends ExceptionHandler
      * @var array
      */
     protected $dontFlash = [
+        'current_password',
         'password',
         'password_confirmation',
     ];
@@ -34,13 +36,13 @@ class Handler extends ExceptionHandler
     /**
      * Report or log an exception.
      *
-     * @param Exception $exception
+     * @param \Throwable $exception
      *
-     * @throws Exception
+     * @throws \Throwable
      *
      * @return void
      */
-    public function report(Exception $exception)
+    public function report(Throwable $exception)
     {
         parent::report($exception);
     }
@@ -53,7 +55,7 @@ class Handler extends ExceptionHandler
      *
      * @return \Illuminate\Http\Response
      */
-    public function render($request, Exception $e)
+    public function render($request, Throwable $e)
     {
         if ($this->isApiRequest($request)) {
             return $this->renderApiException($e);

app/Exceptions/NotifyException.php

@@ -23,7 +23,7 @@ class NotifyException extends Exception implements Responsable
     /**
      * Send the response for this type of exception.
      *
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function toResponse($request)
     {

app/Exceptions/OpenIdConnectException.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace BookStack\Exceptions;
+
+class OpenIdConnectException extends NotifyException
+{
+}

app/Exceptions/PrettyException.php

@@ -20,7 +20,7 @@ class PrettyException extends Exception implements Responsable
     /**
      * Render a response for when this exception occurs.
      *
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function toResponse($request)
     {

app/Exceptions/StoppedAuthenticationException.php

@@ -23,7 +23,7 @@ class StoppedAuthenticationException extends \Exception implements Responsable
     }
 
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     public function toResponse($request)
     {

app/Http/Controllers/Api/ApiController.php

@@ -24,9 +24,14 @@ abstract class ApiController extends Controller
 
     /**
      * Get the validation rules for this controller.
+     * Defaults to a $rules property but can be a rules() method.
      */
     public function getValdationRules(): array
     {
+        if (method_exists($this, 'rules')) {
+            return $this->rules();
+        }
+
         return $this->rules;
     }
 }

app/Http/Controllers/Api/AttachmentApiController.php

@@ -0,0 +1,168 @@
+<?php
+
+namespace BookStack\Http\Controllers\Api;
+
+use BookStack\Entities\Models\Page;
+use BookStack\Exceptions\FileUploadException;
+use BookStack\Uploads\Attachment;
+use BookStack\Uploads\AttachmentService;
+use Exception;
+use Illuminate\Contracts\Filesystem\FileNotFoundException;
+use Illuminate\Http\Request;
+use Illuminate\Validation\ValidationException;
+
+class AttachmentApiController extends ApiController
+{
+    protected $attachmentService;
+
+    public function __construct(AttachmentService $attachmentService)
+    {
+        $this->attachmentService = $attachmentService;
+    }
+
+    /**
+     * Get a listing of attachments visible to the user.
+     * The external property indicates whether the attachment is simple a link.
+     * A false value for the external property would indicate a file upload.
+     */
+    public function list()
+    {
+        return $this->apiListingResponse(Attachment::visible(), [
+            'id', 'name', 'extension', 'uploaded_to', 'external', 'order', 'created_at', 'updated_at', 'created_by', 'updated_by',
+        ]);
+    }
+
+    /**
+     * Create a new attachment in the system.
+     * An uploaded_to value must be provided containing an ID of the page
+     * that this upload will be related to.
+     *
+     * If you're uploading a file the POST data should be provided via
+     * a multipart/form-data type request instead of JSON.
+     *
+     * @throws ValidationException
+     * @throws FileUploadException
+     */
+    public function create(Request $request)
+    {
+        $this->checkPermission('attachment-create-all');
+        $requestData = $this->validate($request, $this->rules()['create']);
+
+        $pageId = $request->get('uploaded_to');
+        $page = Page::visible()->findOrFail($pageId);
+        $this->checkOwnablePermission('page-update', $page);
+
+        if ($request->hasFile('file')) {
+            $uploadedFile = $request->file('file');
+            $attachment = $this->attachmentService->saveNewUpload($uploadedFile, $page->id);
+        } else {
+            $attachment = $this->attachmentService->saveNewFromLink(
+                $requestData['name'],
+                $requestData['link'],
+                $page->id
+            );
+        }
+
+        $this->attachmentService->updateFile($attachment, $requestData);
+
+        return response()->json($attachment);
+    }
+
+    /**
+     * Get the details & content of a single attachment of the given ID.
+     * The attachment link or file content is provided via a 'content' property.
+     * For files the content will be base64 encoded.
+     *
+     * @throws FileNotFoundException
+     */
+    public function read(string $id)
+    {
+        /** @var Attachment $attachment */
+        $attachment = Attachment::visible()
+            ->with(['createdBy', 'updatedBy'])
+            ->findOrFail($id);
+
+        $attachment->setAttribute('links', [
+            'html'     => $attachment->htmlLink(),
+            'markdown' => $attachment->markdownLink(),
+        ]);
+
+        if (!$attachment->external) {
+            $attachmentContents = $this->attachmentService->getAttachmentFromStorage($attachment);
+            $attachment->setAttribute('content', base64_encode($attachmentContents));
+        } else {
+            $attachment->setAttribute('content', $attachment->path);
+        }
+
+        return response()->json($attachment);
+    }
+
+    /**
+     * Update the details of a single attachment.
+     * As per the create endpoint, if a file is being provided as the attachment content
+     * the request should be formatted as a multipart/form-data request instead of JSON.
+     *
+     * @throws ValidationException
+     * @throws FileUploadException
+     */
+    public function update(Request $request, string $id)
+    {
+        $requestData = $this->validate($request, $this->rules()['update']);
+        /** @var Attachment $attachment */
+        $attachment = Attachment::visible()->findOrFail($id);
+
+        $page = $attachment->page;
+        if ($requestData['uploaded_to'] ?? false) {
+            $pageId = $request->get('uploaded_to');
+            $page = Page::visible()->findOrFail($pageId);
+            $attachment->uploaded_to = $requestData['uploaded_to'];
+        }
+
+        $this->checkOwnablePermission('page-view', $page);
+        $this->checkOwnablePermission('page-update', $page);
+        $this->checkOwnablePermission('attachment-update', $attachment);
+
+        if ($request->hasFile('file')) {
+            $uploadedFile = $request->file('file');
+            $attachment = $this->attachmentService->saveUpdatedUpload($uploadedFile, $attachment);
+        }
+
+        $this->attachmentService->updateFile($attachment, $requestData);
+
+        return response()->json($attachment);
+    }
+
+    /**
+     * Delete an attachment of the given ID.
+     *
+     * @throws Exception
+     */
+    public function delete(string $id)
+    {
+        /** @var Attachment $attachment */
+        $attachment = Attachment::visible()->findOrFail($id);
+        $this->checkOwnablePermission('attachment-delete', $attachment);
+
+        $this->attachmentService->deleteFile($attachment);
+
+        return response('', 204);
+    }
+
+    protected function rules(): array
+    {
+        return [
+            'create' => [
+                'name'        => ['required', 'min:1', 'max:255', 'string'],
+                'uploaded_to' => ['required', 'integer', 'exists:pages,id'],
+                'file'        => array_merge(['required_without:link'], $this->attachmentService->getFileValidationRules()),
+                'link'        => ['required_without:file', 'min:1', 'max:255', 'safe_url'],
+            ],
+            'update' => [
+                'name'        => ['min:1', 'max:255', 'string'],
+                'uploaded_to' => ['integer', 'exists:pages,id'],
+                'file'        => $this->attachmentService->getFileValidationRules(),
+                'link'        => ['min:1', 'max:255', 'safe_url'],
+            ],
+        ];
+    }
+}

app/Http/Controllers/Api/BookApiController.php

@@ -13,14 +13,14 @@ class BookApiController extends ApiController
 
     protected $rules = [
         'create' => [
-            'name'        => 'required|string|max:255',
-            'description' => 'string|max:1000',
-            'tags'        => 'array',
+            'name'        => ['required', 'string', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'tags'        => ['array'],
         ],
         'update' => [
-            'name'        => 'string|min:1|max:255',
-            'description' => 'string|max:1000',
-            'tags'        => 'array',
+            'name'        => ['string', 'min:1', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'tags'        => ['array'],
         ],
     ];
 

app/Http/Controllers/Api/BookshelfApiController.php

@@ -18,14 +18,14 @@ class BookshelfApiController extends ApiController
 
     protected $rules = [
         'create' => [
-            'name'        => 'required|string|max:255',
-            'description' => 'string|max:1000',
-            'books'       => 'array',
+            'name'        => ['required', 'string', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'books'       => ['array'],
         ],
         'update' => [
-            'name'        => 'string|min:1|max:255',
-            'description' => 'string|max:1000',
-            'books'       => 'array',
+            'name'        => ['string', 'min:1', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'books'       => ['array'],
         ],
     ];
 

app/Http/Controllers/Api/ChapterApiController.php

@@ -14,16 +14,16 @@ class ChapterApiController extends ApiController
 
     protected $rules = [
         'create' => [
-            'book_id'     => 'required|integer',
-            'name'        => 'required|string|max:255',
-            'description' => 'string|max:1000',
-            'tags'        => 'array',
+            'book_id'     => ['required', 'integer'],
+            'name'        => ['required', 'string', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'tags'        => ['array'],
         ],
         'update' => [
-            'book_id'     => 'integer',
-            'name'        => 'string|min:1|max:255',
-            'description' => 'string|max:1000',
-            'tags'        => 'array',
+            'book_id'     => ['integer'],
+            'name'        => ['string', 'min:1', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'tags'        => ['array'],
         ],
     ];
 

app/Http/Controllers/Api/PageApiController.php

@@ -16,20 +16,20 @@ class PageApiController extends ApiController
 
     protected $rules = [
         'create' => [
-            'book_id'    => 'required_without:chapter_id|integer',
-            'chapter_id' => 'required_without:book_id|integer',
-            'name'       => 'required|string|max:255',
-            'html'       => 'required_without:markdown|string',
-            'markdown'   => 'required_without:html|string',
-            'tags'       => 'array',
+            'book_id'    => ['required_without:chapter_id', 'integer'],
+            'chapter_id' => ['required_without:book_id', 'integer'],
+            'name'       => ['required', 'string', 'max:255'],
+            'html'       => ['required_without:markdown', 'string'],
+            'markdown'   => ['required_without:html', 'string'],
+            'tags'       => ['array'],
         ],
         'update' => [
-            'book_id'    => 'required|integer',
-            'chapter_id' => 'required|integer',
-            'name'       => 'string|min:1|max:255',
-            'html'       => 'string',
-            'markdown'   => 'string',
-            'tags'       => 'array',
+            'book_id'    => ['required', 'integer'],
+            'chapter_id' => ['required', 'integer'],
+            'name'       => ['string', 'min:1', 'max:255'],
+            'html'       => ['string'],
+            'markdown'   => ['string'],
+            'tags'       => ['array'],
         ],
     ];
 

app/Http/Controllers/Api/SearchApiController.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace BookStack\Http\Controllers\Api;
+
+use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Tools\SearchOptions;
+use BookStack\Entities\Tools\SearchRunner;
+use Illuminate\Http\Request;
+
+class SearchApiController extends ApiController
+{
+    protected $searchRunner;
+
+    protected $rules = [
+        'all' => [
+            'query'  => ['required'],
+            'page'   => ['integer', 'min:1'],
+            'count'  => ['integer', 'min:1', 'max:100'],
+        ],
+    ];
+
+    public function __construct(SearchRunner $searchRunner)
+    {
+        $this->searchRunner = $searchRunner;
+    }
+
+    /**
+     * Run a search query against all main content types (shelves, books, chapters & pages)
+     * in the system. Takes the same input as the main search bar within the BookStack
+     * interface as a 'query' parameter. See https://www.bookstackapp.com/docs/user/searching/
+     * for a full list of search term options. Results contain a 'type' property to distinguish
+     * between: bookshelf, book, chapter & page.
+     *
+     * The paging parameters and response format emulates a standard listing endpoint
+     * but standard sorting and filtering cannot be done on this endpoint. If a count value
+     * is provided this will only be taken as a suggestion. The results in the response
+     * may currently be up to 4x this value.
+     */
+    public function all(Request $request)
+    {
+        $this->validate($request, $this->rules['all']);
+
+        $options = SearchOptions::fromString($request->get('query') ?? '');
+        $page = intval($request->get('page', '0')) ?: 1;
+        $count = min(intval($request->get('count', '0')) ?: 20, 100);
+
+        $results = $this->searchRunner->searchEntities($options, 'all', $page, $count);
+
+        /** @var Entity $result */
+        foreach ($results['results'] as $result) {
+            $result->setVisible([
+                'id', 'name', 'slug', 'book_id',
+                'chapter_id', 'draft', 'template',
+                'created_at', 'updated_at',
+                'tags', 'type',
+            ]);
+            $result->setAttribute('type', $result->getType());
+        }
+
+        return response()->json([
+            'data'  => $results['results'],
+            'total' => $results['total'],
+        ]);
+    }
+}

app/Http/Controllers/AttachmentController.php

@@ -36,8 +36,8 @@ class AttachmentController extends Controller
     public function upload(Request $request)
     {
         $this->validate($request, [
-            'uploaded_to' => 'required|integer|exists:pages,id',
-            'file'        => 'required|file',
+            'uploaded_to' => ['required', 'integer', 'exists:pages,id'],
+            'file'        => array_merge(['required'], $this->attachmentService->getFileValidationRules()),
         ]);
 
         $pageId = $request->get('uploaded_to');
@@ -65,9 +65,10 @@ class AttachmentController extends Controller
     public function uploadUpdate(Request $request, $attachmentId)
     {
         $this->validate($request, [
-            'file' => 'required|file',
+            'file' => array_merge(['required'], $this->attachmentService->getFileValidationRules()),
         ]);
 
+        /** @var Attachment $attachment */
         $attachment = Attachment::query()->findOrFail($attachmentId);
         $this->checkOwnablePermission('view', $attachment->page);
         $this->checkOwnablePermission('page-update', $attachment->page);
@@ -86,11 +87,10 @@ class AttachmentController extends Controller
 
     /**
      * Get the update form for an attachment.
-     *
-     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
      */
     public function getUpdateForm(string $attachmentId)
     {
+        /** @var Attachment $attachment */
         $attachment = Attachment::query()->findOrFail($attachmentId);
 
         $this->checkOwnablePermission('page-update', $attachment->page);
@@ -111,8 +111,8 @@ class AttachmentController extends Controller
 
         try {
             $this->validate($request, [
-                'attachment_edit_name' => 'required|string|min:1|max:255',
-                'attachment_edit_url'  => 'string|min:1|max:255|safe_url',
+                'attachment_edit_name' => ['required', 'string', 'min:1', 'max:255'],
+                'attachment_edit_url'  => ['string', 'min:1', 'max:255', 'safe_url'],
             ]);
         } catch (ValidationException $exception) {
             return response()->view('attachments.manager-edit-form', array_merge($request->only(['attachment_edit_name', 'attachment_edit_url']), [
@@ -121,9 +121,9 @@ class AttachmentController extends Controller
             ]), 422);
         }
 
-        $this->checkOwnablePermission('view', $attachment->page);
+        $this->checkOwnablePermission('page-view', $attachment->page);
         $this->checkOwnablePermission('page-update', $attachment->page);
-        $this->checkOwnablePermission('attachment-create', $attachment);
+        $this->checkOwnablePermission('attachment-update', $attachment);
 
         $attachment = $this->attachmentService->updateFile($attachment, [
             'name' => $request->get('attachment_edit_name'),
@@ -146,9 +146,9 @@ class AttachmentController extends Controller
 
         try {
             $this->validate($request, [
-                'attachment_link_uploaded_to' => 'required|integer|exists:pages,id',
-                'attachment_link_name'        => 'required|string|min:1|max:255',
-                'attachment_link_url'         => 'required|string|min:1|max:255|safe_url',
+                'attachment_link_uploaded_to' => ['required', 'integer', 'exists:pages,id'],
+                'attachment_link_name'        => ['required', 'string', 'min:1', 'max:255'],
+                'attachment_link_url'         => ['required', 'string', 'min:1', 'max:255', 'safe_url'],
             ]);
         } catch (ValidationException $exception) {
             return response()->view('attachments.manager-link-form', array_merge($request->only(['attachment_link_name', 'attachment_link_url']), [
@@ -173,6 +173,8 @@ class AttachmentController extends Controller
 
     /**
      * Get the attachments for a specific page.
+     *
+     * @throws NotFoundException
      */
     public function listForPage(int $pageId)
     {
@@ -193,7 +195,7 @@ class AttachmentController extends Controller
     public function sortForPage(Request $request, int $pageId)
     {
         $this->validate($request, [
-            'order' => 'required|array',
+            'order' => ['required', 'array'],
         ]);
         $page = $this->pageRepo->getById($pageId);
         $this->checkOwnablePermission('page-update', $page);

app/Http/Controllers/Auth/ConfirmEmailController.php

@@ -10,10 +10,7 @@ use BookStack\Exceptions\UserTokenExpiredException;
 use BookStack\Exceptions\UserTokenNotFoundException;
 use BookStack\Http\Controllers\Controller;
 use Exception;
-use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
-use Illuminate\Routing\Redirector;
-use Illuminate\View\View;
 
 class ConfirmEmailController extends Controller
 {
@@ -57,33 +54,23 @@ class ConfirmEmailController extends Controller
     /**
      * Confirms an email via a token and logs the user into the system.
      *
-     * @param $token
-     *
      * @throws ConfirmationEmailException
      * @throws Exception
-     *
-     * @return RedirectResponse|Redirector
      */
-    public function confirm($token)
+    public function confirm(string $token)
     {
         try {
             $userId = $this->emailConfirmationService->checkTokenAndGetUserId($token);
-        } catch (Exception $exception) {
-            if ($exception instanceof UserTokenNotFoundException) {
-                $this->showErrorNotification(trans('errors.email_confirmation_invalid'));
+        } catch (UserTokenNotFoundException $exception) {
+            $this->showErrorNotification(trans('errors.email_confirmation_invalid'));
 
-                return redirect('/register');
-            }
+            return redirect('/register');
+        } catch (UserTokenExpiredException $exception) {
+            $user = $this->userRepo->getById($exception->userId);
+            $this->emailConfirmationService->sendConfirmation($user);
+            $this->showErrorNotification(trans('errors.email_confirmation_expired'));
 
-            if ($exception instanceof UserTokenExpiredException) {
-                $user = $this->userRepo->getById($exception->userId);
-                $this->emailConfirmationService->sendConfirmation($user);
-                $this->showErrorNotification(trans('errors.email_confirmation_expired'));
-
-                return redirect('/register/confirm');
-            }
-
-            throw $exception;
+            return redirect('/register/confirm');
         }
 
         $user = $this->userRepo->getById($userId);
@@ -92,22 +79,17 @@ class ConfirmEmailController extends Controller
 
         $this->emailConfirmationService->deleteByUser($user);
         $this->showSuccessNotification(trans('auth.email_confirm_success'));
-        $this->loginService->login($user, auth()->getDefaultDriver());
 
-        return redirect('/');
+        return redirect('/login');
     }
 
     /**
      * Resend the confirmation email.
-     *
-     * @param Request $request
-     *
-     * @return View
      */
     public function resend(Request $request)
     {
         $this->validate($request, [
-            'email' => 'required|email|exists:users,email',
+            'email' => ['required', 'email', 'exists:users,email'],
         ]);
         $user = $this->userRepo->getByEmail($request->get('email'));
 

app/Http/Controllers/Auth/ForgotPasswordController.php

@@ -43,7 +43,9 @@ class ForgotPasswordController extends Controller
      */
     public function sendResetLinkEmail(Request $request)
     {
-        $this->validate($request, ['email' => 'required|email']);
+        $this->validate($request, [
+            'email' => ['required', 'email'],
+        ]);
 
         // We will send the password reset link to this user. Once we have attempted
         // to send the link, we will examine the response then see the message we

app/Http/Controllers/Auth/LoginController.php

@@ -43,7 +43,8 @@ class LoginController extends Controller
     public function __construct(SocialAuthService $socialAuthService, LoginService $loginService)
     {
         $this->middleware('guest', ['only' => ['getLogin', 'login']]);
-        $this->middleware('guard:standard,ldap', ['only' => ['login', 'logout']]);
+        $this->middleware('guard:standard,ldap', ['only' => ['login']]);
+        $this->middleware('guard:standard,ldap,oidc', ['only' => ['logout']]);
 
         $this->socialAuthService = $socialAuthService;
         $this->loginService = $loginService;
@@ -175,16 +176,16 @@ class LoginController extends Controller
      */
     protected function validateLogin(Request $request)
     {
-        $rules = ['password' => 'required|string'];
+        $rules = ['password' => ['required', 'string']];
         $authMethod = config('auth.method');
 
         if ($authMethod === 'standard') {
-            $rules['email'] = 'required|email';
+            $rules['email'] = ['required', 'email'];
         }
 
         if ($authMethod === 'ldap') {
-            $rules['username'] = 'required|string';
-            $rules['email'] = 'email';
+            $rules['username'] = ['required', 'string'];
+            $rules['email'] = ['email'];
         }
 
         $request->validate($rules);

app/Http/Controllers/Auth/MfaBackupCodesController.php

@@ -73,8 +73,7 @@ class MfaBackupCodesController extends Controller
 
         $this->validate($request, [
             'code' => [
-                'required',
-                'max:12', 'min:8',
+                'required', 'max:12', 'min:8',
                 function ($attribute, $value, $fail) use ($codeService, $codes) {
                     if (!$codeService->inputCodeExistsInSet($value, $codes)) {
                         $fail(trans('validation.backup_codes'));

app/Http/Controllers/Auth/OidcController.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace BookStack\Http\Controllers\Auth;
+
+use BookStack\Auth\Access\Oidc\OidcService;
+use BookStack\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+
+class OidcController extends Controller
+{
+    protected $oidcService;
+
+    /**
+     * OpenIdController constructor.
+     */
+    public function __construct(OidcService $oidcService)
+    {
+        $this->oidcService = $oidcService;
+        $this->middleware('guard:oidc');
+    }
+
+    /**
+     * Start the authorization login flow via OIDC.
+     */
+    public function login()
+    {
+        $loginDetails = $this->oidcService->login();
+        session()->flash('oidc_state', $loginDetails['state']);
+
+        return redirect($loginDetails['url']);
+    }
+
+    /**
+     * Authorization flow redirect callback.
+     * Processes authorization response from the OIDC Authorization Server.
+     */
+    public function callback(Request $request)
+    {
+        $storedState = session()->pull('oidc_state');
+        $responseState = $request->query('state');
+
+        if ($storedState !== $responseState) {
+            $this->showErrorNotification(trans('errors.oidc_fail_authed', ['system' => config('oidc.name')]));
+
+            return redirect('/login');
+        }
+
+        $this->oidcService->processAuthorizeResponse($request->query('code'));
+
+        return redirect()->intended();
+    }
+}

app/Http/Controllers/Auth/RegisterController.php

@@ -68,9 +68,9 @@ class RegisterController extends Controller
     protected function validator(array $data)
     {
         return Validator::make($data, [
-            'name'     => 'required|min:2|max:255',
-            'email'    => 'required|email|max:255|unique:users',
-            'password' => 'required|min:8',
+            'name'     => ['required', 'min:2', 'max:255'],
+            'email'    => ['required', 'email', 'max:255', 'unique:users'],
+            'password' => ['required', 'min:8'],
         ]);
     }
 

app/Http/Controllers/Auth/Saml2Controller.php

@@ -4,6 +4,8 @@ namespace BookStack\Http\Controllers\Auth;
 
 use BookStack\Auth\Access\Saml2Service;
 use BookStack\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use Illuminate\Support\Str;
 
 class Saml2Controller extends Controller
 {
@@ -34,7 +36,7 @@ class Saml2Controller extends Controller
      */
     public function logout()
     {
-        $logoutDetails = $this->samlService->logout();
+        $logoutDetails = $this->samlService->logout(auth()->user());
 
         if ($logoutDetails['id']) {
             session()->flash('saml2_logout_request_id', $logoutDetails['id']);
@@ -68,15 +70,54 @@ class Saml2Controller extends Controller
     }
 
     /**
-     * Assertion Consumer Service.
-     * Processes the SAML response from the IDP.
+     * Assertion Consumer Service start URL. Takes the SAMLResponse from the IDP.
+     * Due to being an external POST request, we likely won't have context of the
+     * current user session due to lax cookies. To work around this we store the
+     * SAMLResponse data and redirect to the processAcs endpoint for the actual
+     * processing of the request with proper context of the user session.
      */
-    public function acs()
+    public function startAcs(Request $request)
     {
+        $samlResponse = $request->get('SAMLResponse', null);
+
+        if (empty($samlResponse)) {
+            $this->showErrorNotification(trans('errors.saml_fail_authed', ['system' => config('saml2.name')]));
+
+            return redirect('/login');
+        }
+
+        $acsId = Str::random(16);
+        $cacheKey = 'saml2_acs:' . $acsId;
+        cache()->set($cacheKey, encrypt($samlResponse), 10);
+
+        return redirect()->guest('/saml2/acs?id=' . $acsId);
+    }
+
+    /**
+     * Assertion Consumer Service process endpoint.
+     * Processes the SAML response from the IDP with context of the current session.
+     * Takes the SAML request from the cache, added by the startAcs method above.
+     */
+    public function processAcs(Request $request)
+    {
+        $acsId = $request->get('id', null);
+        $cacheKey = 'saml2_acs:' . $acsId;
+        $samlResponse = null;
+
+        try {
+            $samlResponse = decrypt(cache()->pull($cacheKey));
+        } catch (\Exception $exception) {
+        }
         $requestId = session()->pull('saml2_request_id', null);
 
-        $user = $this->samlService->processAcsResponse($requestId);
-        if ($user === null) {
+        if (empty($acsId) || empty($samlResponse)) {
+            $this->showErrorNotification(trans('errors.saml_fail_authed', ['system' => config('saml2.name')]));
+
+            return redirect('/login');
+        }
+
+        $user = $this->samlService->processAcsResponse($requestId, $samlResponse);
+        if (is_null($user)) {
             $this->showErrorNotification(trans('errors.saml_fail_authed', ['system' => config('saml2.name')]));
 
             return redirect('/login');

app/Http/Controllers/Auth/UserInviteController.php

@@ -2,7 +2,6 @@
 
 namespace BookStack\Http\Controllers\Auth;
 
-use BookStack\Auth\Access\LoginService;
 use BookStack\Auth\Access\UserInviteService;
 use BookStack\Auth\UserRepo;
 use BookStack\Exceptions\UserTokenExpiredException;
@@ -16,19 +15,17 @@ use Illuminate\Routing\Redirector;
 class UserInviteController extends Controller
 {
     protected $inviteService;
-    protected $loginService;
     protected $userRepo;
 
     /**
      * Create a new controller instance.
      */
-    public function __construct(UserInviteService $inviteService, LoginService $loginService, UserRepo $userRepo)
+    public function __construct(UserInviteService $inviteService, UserRepo $userRepo)
     {
         $this->middleware('guest');
         $this->middleware('guard:standard');
 
         $this->inviteService = $inviteService;
-        $this->loginService = $loginService;
         $this->userRepo = $userRepo;
     }
 
@@ -58,7 +55,7 @@ class UserInviteController extends Controller
     public function setPassword(Request $request, string $token)
     {
         $this->validate($request, [
-            'password' => 'required|min:8',
+            'password' => ['required', 'min:8'],
         ]);
 
         try {
@@ -73,10 +70,9 @@ class UserInviteController extends Controller
         $user->save();
 
         $this->inviteService->deleteByUser($user);
-        $this->showSuccessNotification(trans('auth.user_invite_success', ['appName' => setting('app-name')]));
-        $this->loginService->login($user, auth()->getDefaultDriver());
+        $this->showSuccessNotification(trans('auth.user_invite_success_login', ['appName' => setting('app-name')]));
 
-        return redirect('/');
+        return redirect('/login');
     }
 
     /**

app/Http/Controllers/BookController.php

@@ -85,9 +85,9 @@ class BookController extends Controller
     {
         $this->checkPermission('book-create-all');
         $this->validate($request, [
-            'name'        => 'required|string|max:255',
-            'description' => 'string|max:1000',
-            'image'       => 'nullable|' . $this->getImageValidationRules(),
+            'name'        => ['required', 'string', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'image'       => array_merge(['nullable'], $this->getImageValidationRules()),
         ]);
 
         $bookshelf = null;
@@ -156,9 +156,9 @@ class BookController extends Controller
         $book = $this->bookRepo->getBySlug($slug);
         $this->checkOwnablePermission('book-update', $book);
         $this->validate($request, [
-            'name'        => 'required|string|max:255',
-            'description' => 'string|max:1000',
-            'image'       => 'nullable|' . $this->getImageValidationRules(),
+            'name'        => ['required', 'string', 'max:255'],
+            'description' => ['string', 'max:1000'],
+            'image'       => array_merge(['nullable'], $this->getImageValidationRules()),
         ]);
 
         $book = $this->bookRepo->update($book, $request->all());