Updated version and assets for release v21.08.3

* New translations auth.php (Spanish)

* New translations activities.php (Italian)

* New translations settings.php (Italian)

* New translations entities.php (Italian)

* New translations validation.php (Italian)

* New translations activities.php (Danish)

* New translations auth.php (Danish)

* New translations common.php (Danish)

* New translations settings.php (Danish)

* New translations entities.php (Danish)

* New translations auth.php (Danish)

* New translations common.php (Danish)

* New translations errors.php (Danish)

* New translations validation.php (Danish)

* New translations activities.php (Russian)

* New translations auth.php (French)

* New translations auth.php (French)

* New translations settings.php (French)

* New translations entities.php (French)

* New translations auth.php (French)

.env.example.complete

@@ -281,6 +281,12 @@ ALLOW_CONTENT_SCRIPTS=false
 # Contents of the robots.txt file can be overridden, making this option obsolete.
 ALLOW_ROBOTS=null
 
+# Allow server-side fetches to be performed to potentially unknown
+# and user-provided locations. Primarily used in exports when loading
+# in externally referenced assets.
+# Can be 'true' or 'false'.
+ALLOW_UNTRUSTED_SERVER_FETCHING=false
+
 # A list of hosts that BookStack can be iframed within.
 # Space separated if multiple. BookStack host domain is auto-inferred.
 # For Example: ALLOWED_IFRAME_HOSTS="https://example.com https://a.example.com"

.github/translators.txt

@@ -167,3 +167,22 @@ whenwesober :: Indonesian
 Rem (remkovdhoef) :: Dutch
 syn7ax69 :: Bulgarian; Turkish
 Blaade :: French
+Behzad HosseinPoor (behzad.hp) :: Persian
+Ole Aldric (Swoy) :: Norwegian Bokmal
+fharis arabia (raednahdi) :: Arabic
+Alexander Predl (Harveyhase68) :: German
+Rem (Rem9000) :: Dutch
+Michał Stelmach (stelmach-web) :: Polish
+arniom :: French
+REMOVED_USER :: Turkish
+林祖年 (contagion) :: Chinese Traditional
+Siamak Guodarzi (siamakgoudarzi88) :: Persian
+Lis Maestrelo (lismtrl) :: Portuguese, Brazilian
+Nathanaël (nathanaelhoun) :: French
+A Ibnu Hibban (abd.ibnuhibban) :: Indonesian
+Frost-ZX :: Chinese Simplified
+Kuzma Simonov (ovmach) :: Russian
+Vojtěch Krystek (acantophis) :: Czech
+Michał Lipok (mLipok) :: Polish
+Nicolas Pawlak (Mikolajek) :: French
+Thomas Hansen (thomasdk81) :: Danish

app/Actions/Activity.php

@@ -11,16 +11,15 @@ use Illuminate\Support\Str;
 
 /**
  * @property string $type
- * @property User $user
+ * @property User   $user
  * @property Entity $entity
  * @property string $detail
  * @property string $entity_type
- * @property int $entity_id
- * @property int $user_id
+ * @property int    $entity_id
+ * @property int    $user_id
  */
 class Activity extends Model
 {
-
     /**
      * Get the entity for this activity.
      */
@@ -29,6 +28,7 @@ class Activity extends Model
         if ($this->entity_type === '') {
             $this->entity_type = null;
         }
+
         return $this->morphTo('entity');
     }
 
@@ -54,7 +54,7 @@ class Activity extends Model
     public function isForEntity(): bool
     {
         return Str::startsWith($this->type, [
-            'page_', 'chapter_', 'book_', 'bookshelf_'
+            'page_', 'chapter_', 'book_', 'bookshelf_',
         ]);
     }
 

app/Actions/ActivityService.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Auth\Permissions\PermissionService;
 use BookStack\Auth\User;
@@ -33,6 +35,7 @@ class ActivityService
 
     /**
      * Add a generic activity event to the database.
+     *
      * @param string|Loggable $detail
      */
     public function add(string $type, $detail = '')
@@ -54,7 +57,7 @@ class ActivityService
     {
         return $this->activity->newInstance()->forceFill([
             'type'     => strtolower($type),
-            'user_id' => user()->id,
+            'user_id'  => user()->id,
         ]);
     }
 
@@ -67,8 +70,8 @@ class ActivityService
     {
         $entity->activity()->update([
             'detail'       => $entity->name,
-            'entity_id'   => null,
-            'entity_type' => null,
+            'entity_id'    => null,
+            'entity_type'  => null,
         ]);
     }
 
@@ -98,10 +101,10 @@ class ActivityService
         $queryIds = [$entity->getMorphClass() => [$entity->id]];
 
         if ($entity->isA('book')) {
-            $queryIds[(new Chapter)->getMorphClass()] = $entity->chapters()->visible()->pluck('id');
+            $queryIds[(new Chapter())->getMorphClass()] = $entity->chapters()->visible()->pluck('id');
         }
         if ($entity->isA('book') || $entity->isA('chapter')) {
-            $queryIds[(new Page)->getMorphClass()] = $entity->pages()->visible()->pluck('id');
+            $queryIds[(new Page())->getMorphClass()] = $entity->pages()->visible()->pluck('id');
         }
 
         $query = $this->activity->newQuery();
@@ -143,7 +146,9 @@ class ActivityService
 
     /**
      * Filters out similar activity.
+     *
      * @param Activity[] $activities
+     *
      * @return array
      */
     protected function filterSimilar(iterable $activities): array
@@ -185,7 +190,7 @@ class ActivityService
             return;
         }
 
-        $message = str_replace("%u", $username, $message);
+        $message = str_replace('%u', $username, $message);
         $channel = config('logging.failed_login.channel');
         Log::channel($channel)->warning($message);
     }

app/Actions/ActivityType.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 class ActivityType
 {
@@ -48,4 +50,7 @@ class ActivityType
     const AUTH_PASSWORD_RESET_UPDATE = 'auth_password_reset_update';
     const AUTH_LOGIN = 'auth_login';
     const AUTH_REGISTER = 'auth_register';
+
+    const MFA_SETUP_METHOD = 'mfa_setup_method';
+    const MFA_REMOVE_METHOD = 'mfa_remove_method';
 }

app/Actions/Comment.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Model;
 use BookStack\Traits\HasCreatorAndUpdater;
@@ -18,7 +20,7 @@ class Comment extends Model
     protected $appends = ['created', 'updated'];
 
     /**
-     * Get the entity that this comment belongs to
+     * Get the entity that this comment belongs to.
      */
     public function entity(): MorphTo
     {
@@ -35,6 +37,7 @@ class Comment extends Model
 
     /**
      * Get created date as a relative diff.
+     *
      * @return mixed
      */
     public function getCreatedAttribute()
@@ -44,6 +47,7 @@ class Comment extends Model
 
     /**
      * Get updated date as a relative diff.
+     *
      * @return mixed
      */
     public function getUpdatedAttribute()

app/Actions/CommentRepo.php

@@ -1,21 +1,21 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Entities\Models\Entity;
-use League\CommonMark\CommonMarkConverter;
 use BookStack\Facades\Activity as ActivityService;
+use League\CommonMark\CommonMarkConverter;
 
 /**
- * Class CommentRepo
+ * Class CommentRepo.
  */
 class CommentRepo
 {
-
     /**
-     * @var Comment $comment
+     * @var Comment
      */
     protected $comment;
 
-
     public function __construct(Comment $comment)
     {
         $this->comment = $comment;
@@ -46,6 +46,7 @@ class CommentRepo
 
         $entity->comments()->save($comment);
         ActivityService::addForEntity($entity, ActivityType::COMMENTED_ON);
+
         return $comment;
     }
 
@@ -58,6 +59,7 @@ class CommentRepo
         $comment->text = $text;
         $comment->html = $this->commentToHtml($text);
         $comment->save();
+
         return $comment;
     }
 
@@ -75,8 +77,8 @@ class CommentRepo
     public function commentToHtml(string $commentText): string
     {
         $converter = new CommonMarkConverter([
-            'html_input' => 'strip',
-            'max_nesting_level' => 10,
+            'html_input'         => 'strip',
+            'max_nesting_level'  => 10,
             'allow_unsafe_links' => false,
         ]);
 
@@ -89,6 +91,7 @@ class CommentRepo
     protected function getNextLocalId(Entity $entity): int
     {
         $comments = $entity->comments(false)->orderBy('local_id', 'desc')->first();
+
         return ($comments->local_id ?? 0) + 1;
     }
 }

app/Actions/Favourite.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Model;
 use Illuminate\Database\Eloquent\Relations\MorphTo;

app/Actions/Tag.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Model;
 use Illuminate\Database\Eloquent\Relations\MorphTo;
@@ -9,7 +11,7 @@ class Tag extends Model
     protected $hidden = ['id', 'entity_id', 'entity_type', 'created_at', 'updated_at'];
 
     /**
-     * Get the entity that this tag belongs to
+     * Get the entity that this tag belongs to.
      */
     public function entity(): MorphTo
     {
@@ -21,7 +23,7 @@ class Tag extends Model
      */
     public function nameUrl(): string
     {
-        return url('/search?term=%5B' . urlencode($this->name) .'%5D');
+        return url('/search?term=%5B' . urlencode($this->name) . '%5D');
     }
 
     /**
@@ -29,6 +31,6 @@ class Tag extends Model
      */
     public function valueUrl(): string
     {
-        return url('/search?term=%5B' . urlencode($this->name) .'%3D' . urlencode($this->value) . '%5D');
+        return url('/search?term=%5B' . urlencode($this->name) . '%3D' . urlencode($this->value) . '%5D');
     }
 }

app/Actions/TagRepo.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Auth\Permissions\PermissionService;
 use BookStack\Entities\Models\Entity;
@@ -7,7 +9,6 @@ use Illuminate\Support\Collection;
 
 class TagRepo
 {
-
     protected $tag;
     protected $permissionService;
 
@@ -37,6 +38,7 @@ class TagRepo
         }
 
         $query = $this->permissionService->filterRestrictedEntityRelations($query, 'tags', 'entity_id', 'entity_type');
+
         return $query->get(['name'])->pluck('name');
     }
 
@@ -62,11 +64,12 @@ class TagRepo
         }
 
         $query = $this->permissionService->filterRestrictedEntityRelations($query, 'tags', 'entity_id', 'entity_type');
+
         return $query->get(['value'])->pluck('value');
     }
 
     /**
-     * Save an array of tags to an entity
+     * Save an array of tags to an entity.
      */
     public function saveTagsToEntity(Entity $entity, array $tags = []): iterable
     {
@@ -89,6 +92,7 @@ class TagRepo
     {
         $name = trim($input['name']);
         $value = isset($input['value']) ? trim($input['value']) : '';
+
         return $this->tag->newInstance(['name' => $name, 'value' => $value]);
     }
 }

app/Actions/View.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Actions;
+<?php
+
+namespace BookStack\Actions;
 
 use BookStack\Interfaces\Viewable;
 use BookStack\Model;
@@ -16,7 +18,6 @@ use Illuminate\Database\Eloquent\Relations\MorphTo;
  */
 class View extends Model
 {
-
     protected $fillable = ['user_id', 'views'];
 
     /**

app/Api/ApiDocsGenerator.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Api;
+<?php
+
+namespace BookStack\Api;
 
 use BookStack\Http\Controllers\Api\ApiController;
 use Illuminate\Contracts\Container\BindingResolutionException;
@@ -12,7 +14,6 @@ use ReflectionMethod;
 
 class ApiDocsGenerator
 {
-
     protected $reflectionClasses = [];
     protected $controllerClasses = [];
 
@@ -30,6 +31,7 @@ class ApiDocsGenerator
             $docs = (new static())->generate();
             Cache::put($cacheKey, $docs, 60 * 24);
         }
+
         return $docs;
     }
 
@@ -42,6 +44,7 @@ class ApiDocsGenerator
         $apiRoutes = $this->loadDetailsFromControllers($apiRoutes);
         $apiRoutes = $this->loadDetailsFromFiles($apiRoutes);
         $apiRoutes = $apiRoutes->groupBy('base_model');
+
         return $apiRoutes;
     }
 
@@ -57,6 +60,7 @@ class ApiDocsGenerator
                 $exampleContent = file_exists($exampleFile) ? file_get_contents($exampleFile) : null;
                 $route["example_{$exampleType}"] = $exampleContent;
             }
+
             return $route;
         });
     }
@@ -71,12 +75,14 @@ class ApiDocsGenerator
             $comment = $method->getDocComment();
             $route['description'] = $comment ? $this->parseDescriptionFromMethodComment($comment) : null;
             $route['body_params'] = $this->getBodyParamsFromClass($route['controller'], $route['controller_method']);
+
             return $route;
         });
     }
 
     /**
      * Load body params and their rules by inspecting the given class and method name.
+     *
      * @throws BindingResolutionException
      */
     protected function getBodyParamsFromClass(string $className, string $methodName): ?array
@@ -92,6 +98,7 @@ class ApiDocsGenerator
         foreach ($rules as $param => $ruleString) {
             $rules[$param] = explode('|', $ruleString);
         }
+
         return count($rules) > 0 ? $rules : null;
     }
 
@@ -102,11 +109,13 @@ class ApiDocsGenerator
     {
         $matches = [];
         preg_match_all('/^\s*?\*\s((?![@\s]).*?)$/m', $comment, $matches);
+
         return implode(' ', $matches[1] ?? []);
     }
 
     /**
      * Get a reflection method from the given class name and method name.
+     *
      * @throws ReflectionException
      */
     protected function getReflectionMethod(string $className, string $methodName): ReflectionMethod
@@ -131,14 +140,15 @@ class ApiDocsGenerator
             [$controller, $controllerMethod] = explode('@', $route->action['uses']);
             $baseModelName = explode('.', explode('/', $route->uri)[1])[0];
             $shortName = $baseModelName . '-' . $controllerMethod;
+
             return [
-                'name' => $shortName,
-                'uri' => $route->uri,
-                'method' => $route->methods[0],
-                'controller' => $controller,
-                'controller_method' => $controllerMethod,
+                'name'                    => $shortName,
+                'uri'                     => $route->uri,
+                'method'                  => $route->methods[0],
+                'controller'              => $controller,
+                'controller_method'       => $controllerMethod,
                 'controller_method_kebab' => Str::kebab($controllerMethod),
-                'base_model' => $baseModelName,
+                'base_model'              => $baseModelName,
             ];
         });
     }

app/Api/ApiToken.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Api;
+<?php
+
+namespace BookStack\Api;
 
 use BookStack\Auth\User;
 use BookStack\Interfaces\Loggable;
@@ -7,19 +9,20 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Support\Carbon;
 
 /**
- * Class ApiToken
- * @property int $id
+ * Class ApiToken.
+ *
+ * @property int    $id
  * @property string $token_id
  * @property string $secret
  * @property string $name
  * @property Carbon $expires_at
- * @property User $user
+ * @property User   $user
  */
 class ApiToken extends Model implements Loggable
 {
     protected $fillable = ['name', 'expires_at'];
     protected $casts = [
-        'expires_at' => 'date:Y-m-d'
+        'expires_at' => 'date:Y-m-d',
     ];
 
     /**

app/Api/ApiTokenGuard.php

@@ -2,6 +2,7 @@
 
 namespace BookStack\Api;
 
+use BookStack\Auth\Access\LoginService;
 use BookStack\Exceptions\ApiAuthException;
 use Illuminate\Auth\GuardHelpers;
 use Illuminate\Contracts\Auth\Authenticatable;
@@ -12,7 +13,6 @@ use Symfony\Component\HttpFoundation\Request;
 
 class ApiTokenGuard implements Guard
 {
-
     use GuardHelpers;
 
     /**
@@ -20,9 +20,14 @@ class ApiTokenGuard implements Guard
      */
     protected $request;
 
+    /**
+     * @var LoginService
+     */
+    protected $loginService;
 
     /**
      * The last auth exception thrown in this request.
+     *
      * @var ApiAuthException
      */
     protected $lastAuthException;
@@ -30,11 +35,12 @@ class ApiTokenGuard implements Guard
     /**
      * ApiTokenGuard constructor.
      */
-    public function __construct(Request $request)
+    public function __construct(Request $request, LoginService $loginService)
     {
         $this->request = $request;
+        $this->loginService = $loginService;
     }
-    
+
     /**
      * @inheritDoc
      */
@@ -47,6 +53,7 @@ class ApiTokenGuard implements Guard
         }
 
         $user = null;
+
         try {
             $user = $this->getAuthorisedUserFromRequest();
         } catch (ApiAuthException $exception) {
@@ -54,19 +61,20 @@ class ApiTokenGuard implements Guard
         }
 
         $this->user = $user;
+
         return $user;
     }
 
     /**
      * Determine if current user is authenticated. If not, throw an exception.
      *
-     * @return \Illuminate\Contracts\Auth\Authenticatable
-     *
      * @throws ApiAuthException
+     *
+     * @return \Illuminate\Contracts\Auth\Authenticatable
      */
     public function authenticate()
     {
-        if (! is_null($user = $this->user())) {
+        if (!is_null($user = $this->user())) {
             return $user;
         }
 
@@ -79,6 +87,7 @@ class ApiTokenGuard implements Guard
 
     /**
      * Check the API token in the request and fetch a valid authorised user.
+     *
      * @throws ApiAuthException
      */
     protected function getAuthorisedUserFromRequest(): Authenticatable
@@ -93,11 +102,16 @@ class ApiTokenGuard implements Guard
 
         $this->validateToken($token, $secret);
 
+        if ($this->loginService->awaitingEmailConfirmation($token->user)) {
+            throw new ApiAuthException(trans('errors.email_confirmation_awaiting'));
+        }
+
         return $token->user;
     }
 
     /**
      * Validate the format of the token header value string.
+     *
      * @throws ApiAuthException
      */
     protected function validateTokenHeaderValue(string $authToken): void
@@ -114,6 +128,7 @@ class ApiTokenGuard implements Guard
     /**
      * Validate the given secret against the given token and ensure the token
      * currently has access to the instance API.
+     *
      * @throws ApiAuthException
      */
     protected function validateToken(?ApiToken $token, string $secret): void

app/Api/ListingResponseBuilder.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Api;
+<?php
+
+namespace BookStack\Api;
 
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Collection;
@@ -6,7 +8,6 @@ use Illuminate\Http\Request;
 
 class ListingResponseBuilder
 {
-
     protected $query;
     protected $request;
     protected $fields;
@@ -18,7 +19,7 @@ class ListingResponseBuilder
         'lt'   => '<',
         'gte'  => '>=',
         'lte'  => '<=',
-        'like' => 'like'
+        'like' => 'like',
     ];
 
     /**
@@ -42,7 +43,7 @@ class ListingResponseBuilder
         $data = $this->fetchData($filteredQuery);
 
         return response()->json([
-            'data' => $data,
+            'data'  => $data,
             'total' => $total,
         ]);
     }
@@ -54,6 +55,7 @@ class ListingResponseBuilder
     {
         $query = $this->countAndOffsetQuery($query);
         $query = $this->sortQuery($query);
+
         return $query->get($this->fields);
     }
 
@@ -95,6 +97,7 @@ class ListingResponseBuilder
         }
 
         $queryOperator = $this->filterOperators[$filterOperator];
+
         return [$field, $queryOperator, $value];
     }
 

app/Application.php

@@ -4,11 +4,11 @@ namespace BookStack;
 
 class Application extends \Illuminate\Foundation\Application
 {
-
     /**
      * Get the path to the application configuration files.
      *
-     * @param  string  $path Optionally, a path to append to the config path
+     * @param string $path Optionally, a path to append to the config path
+     *
      * @return string
      */
     public function configPath($path = '')
@@ -18,6 +18,6 @@ class Application extends \Illuminate\Foundation\Application
             . 'app'
             . DIRECTORY_SEPARATOR
             . 'Config'
-            . ($path ? DIRECTORY_SEPARATOR.$path : $path);
+            . ($path ? DIRECTORY_SEPARATOR . $path : $path);
     }
 }

app/Auth/Access/EmailConfirmationService.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 use BookStack\Auth\User;
 use BookStack\Exceptions\ConfirmationEmailException;
@@ -12,7 +14,7 @@ class EmailConfirmationService extends UserTokenService
     /**
      * Create new confirmation for a user,
      * Also removes any existing old ones.
-     * @param User $user
+     *
      * @throws ConfirmationEmailException
      */
     public function sendConfirmation(User $user)
@@ -29,9 +31,8 @@ class EmailConfirmationService extends UserTokenService
 
     /**
      * Check if confirmation is required in this instance.
-     * @return bool
      */
-    public function confirmationRequired() : bool
+    public function confirmationRequired(): bool
     {
         return setting('registration-confirmation')
             || setting('registration-restrict');

app/Auth/Access/ExternalAuthService.php

@@ -1,10 +1,10 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 use BookStack\Auth\Role;
 use BookStack\Auth\User;
-use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Support\Collection;
-use Illuminate\Support\Facades\DB;
 
 class ExternalAuthService
 {
@@ -19,6 +19,7 @@ class ExternalAuthService
         }
 
         $roleName = str_replace(' ', '-', trim(strtolower($role->display_name)));
+
         return in_array($roleName, $groupNames);
     }
 
@@ -57,7 +58,7 @@ class ExternalAuthService
     }
 
     /**
-     * Sync the groups to the user roles for the current user
+     * Sync the groups to the user roles for the current user.
      */
     public function syncWithGroups(User $user, array $userGroups): void
     {

app/Auth/Access/ExternalBaseUserProvider.php

@@ -7,7 +7,6 @@ use Illuminate\Contracts\Auth\UserProvider;
 
 class ExternalBaseUserProvider implements UserProvider
 {
-
     /**
      * The user model.
      *
@@ -17,7 +16,8 @@ class ExternalBaseUserProvider implements UserProvider
 
     /**
      * LdapUserProvider constructor.
-     * @param             $model
+     *
+     * @param $model
      */
     public function __construct(string $model)
     {
@@ -32,13 +32,15 @@ class ExternalBaseUserProvider implements UserProvider
     public function createModel()
     {
         $class = '\\' . ltrim($this->model, '\\');
-        return new $class;
+
+        return new $class();
     }
 
     /**
      * Retrieve a user by their unique identifier.
      *
-     * @param  mixed $identifier
+     * @param mixed $identifier
+     *
      * @return \Illuminate\Contracts\Auth\Authenticatable|null
      */
     public function retrieveById($identifier)
@@ -49,8 +51,9 @@ class ExternalBaseUserProvider implements UserProvider
     /**
      * Retrieve a user by their unique identifier and "remember me" token.
      *
-     * @param  mixed  $identifier
-     * @param  string $token
+     * @param mixed  $identifier
+     * @param string $token
+     *
      * @return \Illuminate\Contracts\Auth\Authenticatable|null
      */
     public function retrieveByToken($identifier, $token)
@@ -58,12 +61,12 @@ class ExternalBaseUserProvider implements UserProvider
         return null;
     }
 
-
     /**
      * Update the "remember me" token for the given user in storage.
      *
-     * @param  \Illuminate\Contracts\Auth\Authenticatable $user
-     * @param  string                                     $token
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     * @param string                                     $token
+     *
      * @return void
      */
     public function updateRememberToken(Authenticatable $user, $token)
@@ -74,13 +77,15 @@ class ExternalBaseUserProvider implements UserProvider
     /**
      * Retrieve a user by the given credentials.
      *
-     * @param  array $credentials
+     * @param array $credentials
+     *
      * @return \Illuminate\Contracts\Auth\Authenticatable|null
      */
     public function retrieveByCredentials(array $credentials)
     {
         // Search current user base by looking up a uid
         $model = $this->createModel();
+
         return $model->newQuery()
             ->where('external_auth_id', $credentials['external_auth_id'])
             ->first();
@@ -89,8 +94,9 @@ class ExternalBaseUserProvider implements UserProvider
     /**
      * Validate a user against the given credentials.
      *
-     * @param  \Illuminate\Contracts\Auth\Authenticatable $user
-     * @param  array                                      $credentials
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     * @param array                                      $credentials
+     *
      * @return bool
      */
     public function validateCredentials(Authenticatable $user, array $credentials)

app/Auth/Access/Guards/ExternalBaseSessionGuard.php

@@ -84,7 +84,7 @@ class ExternalBaseSessionGuard implements StatefulGuard
         // If we've already retrieved the user for the current request we can just
         // return it back immediately. We do not want to fetch the user data on
         // every call to this method because that would be tremendously slow.
-        if (! is_null($this->user)) {
+        if (!is_null($this->user)) {
             return $this->user;
         }
 
@@ -92,7 +92,7 @@ class ExternalBaseSessionGuard implements StatefulGuard
 
         // First we will try to load the user using the
         // identifier in the session if one exists.
-        if (! is_null($id)) {
+        if (!is_null($id)) {
             $this->user = $this->provider->retrieveById($id);
         }
 
@@ -118,7 +118,8 @@ class ExternalBaseSessionGuard implements StatefulGuard
     /**
      * Log a user into the application without sessions or cookies.
      *
-     * @param  array  $credentials
+     * @param array $credentials
+     *
      * @return bool
      */
     public function once(array $credentials = [])
@@ -135,12 +136,13 @@ class ExternalBaseSessionGuard implements StatefulGuard
     /**
      * Log the given user ID into the application without sessions or cookies.
      *
-     * @param  mixed  $id
+     * @param mixed $id
+     *
      * @return \Illuminate\Contracts\Auth\Authenticatable|false
      */
     public function onceUsingId($id)
     {
-        if (! is_null($user = $this->provider->retrieveById($id))) {
+        if (!is_null($user = $this->provider->retrieveById($id))) {
             $this->setUser($user);
 
             return $user;
@@ -152,7 +154,8 @@ class ExternalBaseSessionGuard implements StatefulGuard
     /**
      * Validate a user's credentials.
      *
-     * @param  array  $credentials
+     * @param array $credentials
+     *
      * @return bool
      */
     public function validate(array $credentials = [])
@@ -160,12 +163,12 @@ class ExternalBaseSessionGuard implements StatefulGuard
         return false;
     }
 
-
     /**
      * Attempt to authenticate a user using the given credentials.
      *
-     * @param  array  $credentials
-     * @param  bool  $remember
+     * @param array $credentials
+     * @param bool  $remember
+     *
      * @return bool
      */
     public function attempt(array $credentials = [], $remember = false)
@@ -176,26 +179,24 @@ class ExternalBaseSessionGuard implements StatefulGuard
     /**
      * Log the given user ID into the application.
      *
-     * @param  mixed  $id
-     * @param  bool  $remember
+     * @param mixed $id
+     * @param bool  $remember
+     *
      * @return \Illuminate\Contracts\Auth\Authenticatable|false
      */
     public function loginUsingId($id, $remember = false)
     {
-        if (! is_null($user = $this->provider->retrieveById($id))) {
-            $this->login($user, $remember);
-
-            return $user;
-        }
-
+        // Always return false as to disable this method,
+        // Logins should route through LoginService.
         return false;
     }
 
     /**
      * Log a user into the application.
      *
-     * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
-     * @param  bool  $remember
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     * @param bool                                       $remember
+     *
      * @return void
      */
     public function login(AuthenticatableContract $user, $remember = false)
@@ -208,7 +209,8 @@ class ExternalBaseSessionGuard implements StatefulGuard
     /**
      * Update the session with the given ID.
      *
-     * @param  string  $id
+     * @param string $id
+     *
      * @return void
      */
     protected function updateSession($id)
@@ -262,7 +264,7 @@ class ExternalBaseSessionGuard implements StatefulGuard
      */
     public function getName()
     {
-        return 'login_'.$this->name.'_'.sha1(static::class);
+        return 'login_' . $this->name . '_' . sha1(static::class);
     }
 
     /**
@@ -288,7 +290,8 @@ class ExternalBaseSessionGuard implements StatefulGuard
     /**
      * Set the current user.
      *
-     * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
+     * @param \Illuminate\Contracts\Auth\Authenticatable $user
+     *
      * @return $this
      */
     public function setUser(AuthenticatableContract $user)

app/Auth/Access/Guards/LdapSessionGuard.php

@@ -6,8 +6,8 @@ use BookStack\Auth\Access\LdapService;
 use BookStack\Auth\Access\RegistrationService;
 use BookStack\Auth\User;
 use BookStack\Exceptions\LdapException;
-use BookStack\Exceptions\LoginAttemptException;
 use BookStack\Exceptions\LoginAttemptEmailNeededException;
+use BookStack\Exceptions\LoginAttemptException;
 use BookStack\Exceptions\UserRegistrationException;
 use Illuminate\Contracts\Auth\UserProvider;
 use Illuminate\Contracts\Session\Session;
@@ -15,7 +15,6 @@ use Illuminate\Support\Str;
 
 class LdapSessionGuard extends ExternalBaseSessionGuard
 {
-
     protected $ldapService;
 
     /**
@@ -36,8 +35,10 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
      * Validate a user's credentials.
      *
      * @param array $credentials
-     * @return bool
+     *
      * @throws LdapException
+     *
+     * @return bool
      */
     public function validate(array $credentials = [])
     {
@@ -45,7 +46,7 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
 
         if (isset($userDetails['uid'])) {
             $this->lastAttempted = $this->provider->retrieveByCredentials([
-                'external_auth_id' => $userDetails['uid']
+                'external_auth_id' => $userDetails['uid'],
             ]);
         }
 
@@ -56,10 +57,12 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
      * Attempt to authenticate a user using the given credentials.
      *
      * @param array $credentials
-     * @param bool $remember
-     * @return bool
+     * @param bool  $remember
+     *
      * @throws LoginAttemptException
      * @throws LdapException
+     *
+     * @return bool
      */
     public function attempt(array $credentials = [], $remember = false)
     {
@@ -69,7 +72,7 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
         $user = null;
         if (isset($userDetails['uid'])) {
             $this->lastAttempted = $user = $this->provider->retrieveByCredentials([
-                'external_auth_id' => $userDetails['uid']
+                'external_auth_id' => $userDetails['uid'],
             ]);
         }
 
@@ -96,11 +99,13 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
         }
 
         $this->login($user, $remember);
+
         return true;
     }
 
     /**
-     * Create a new user from the given ldap credentials and login credentials
+     * Create a new user from the given ldap credentials and login credentials.
+     *
      * @throws LoginAttemptEmailNeededException
      * @throws LoginAttemptException
      * @throws UserRegistrationException
@@ -114,14 +119,15 @@ class LdapSessionGuard extends ExternalBaseSessionGuard
         }
 
         $details = [
-            'name' => $ldapUserDetails['name'],
-            'email' => $ldapUserDetails['email'] ?: $credentials['email'],
+            'name'             => $ldapUserDetails['name'],
+            'email'            => $ldapUserDetails['email'] ?: $credentials['email'],
             'external_auth_id' => $ldapUserDetails['uid'],
-            'password' => Str::random(32),
+            'password'         => Str::random(32),
         ];
 
         $user = $this->registrationService->registerUser($details, null, false);
         $this->ldapService->saveAndAttachAvatar($user, $ldapUserDetails);
+
         return $user;
     }
 }

app/Auth/Access/Guards/Saml2SessionGuard.php

@@ -3,7 +3,7 @@
 namespace BookStack\Auth\Access\Guards;
 
 /**
- * Saml2 Session Guard
+ * Saml2 Session Guard.
  *
  * The saml2 login process is async in nature meaning it does not fit very well
  * into the default laravel 'Guard' auth flow. Instead most of the logic is done
@@ -16,6 +16,7 @@ class Saml2SessionGuard extends ExternalBaseSessionGuard
      * Validate a user's credentials.
      *
      * @param array $credentials
+     *
      * @return bool
      */
     public function validate(array $credentials = [])
@@ -27,7 +28,8 @@ class Saml2SessionGuard extends ExternalBaseSessionGuard
      * Attempt to authenticate a user using the given credentials.
      *
      * @param array $credentials
-     * @param bool $remember
+     * @param bool  $remember
+     *
      * @return bool
      */
     public function attempt(array $credentials = [], $remember = false)

app/Auth/Access/Ldap.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 /**
  * Class Ldap
@@ -7,11 +9,12 @@
  */
 class Ldap
 {
-
     /**
      * Connect to a LDAP server.
+     *
      * @param string $hostName
      * @param int    $port
+     *
      * @return resource
      */
     public function connect($hostName, $port)
@@ -21,9 +24,11 @@ class Ldap
 
     /**
      * Set the value of a LDAP option for the given connection.
+     *
      * @param resource $ldapConnection
-     * @param int $option
-     * @param mixed $value
+     * @param int      $option
+     * @param mixed    $value
+     *
      * @return bool
      */
     public function setOption($ldapConnection, $option, $value)
@@ -41,8 +46,10 @@ class Ldap
 
     /**
      * Set the version number for the given ldap connection.
+     *
      * @param $ldapConnection
      * @param $version
+     *
      * @return bool
      */
     public function setVersion($ldapConnection, $version)
@@ -52,10 +59,12 @@ class Ldap
 
     /**
      * Search LDAP tree using the provided filter.
+     *
      * @param resource   $ldapConnection
      * @param string     $baseDn
      * @param string     $filter
      * @param array|null $attributes
+     *
      * @return resource
      */
     public function search($ldapConnection, $baseDn, $filter, array $attributes = null)
@@ -65,8 +74,10 @@ class Ldap
 
     /**
      * Get entries from an ldap search result.
+     *
      * @param resource $ldapConnection
      * @param resource $ldapSearchResult
+     *
      * @return array
      */
     public function getEntries($ldapConnection, $ldapSearchResult)
@@ -76,23 +87,28 @@ class Ldap
 
     /**
      * Search and get entries immediately.
+     *
      * @param resource   $ldapConnection
      * @param string     $baseDn
      * @param string     $filter
      * @param array|null $attributes
+     *
      * @return resource
      */
     public function searchAndGetEntries($ldapConnection, $baseDn, $filter, array $attributes = null)
     {
         $search = $this->search($ldapConnection, $baseDn, $filter, $attributes);
+
         return $this->getEntries($ldapConnection, $search);
     }
 
     /**
      * Bind to LDAP directory.
+     *
      * @param resource $ldapConnection
      * @param string   $bindRdn
      * @param string   $bindPassword
+     *
      * @return bool
      */
     public function bind($ldapConnection, $bindRdn = null, $bindPassword = null)
@@ -102,8 +118,10 @@ class Ldap
 
     /**
      * Explode a LDAP dn string into an array of components.
+     *
      * @param string $dn
-     * @param int $withAttrib
+     * @param int    $withAttrib
+     *
      * @return array
      */
     public function explodeDn(string $dn, int $withAttrib)
@@ -113,12 +131,14 @@ class Ldap
 
     /**
      * Escape a string for use in an LDAP filter.
+     *
      * @param string $value
      * @param string $ignore
-     * @param int $flags
+     * @param int    $flags
+     *
      * @return string
      */
-    public function escape(string $value, string $ignore = "", int $flags = 0)
+    public function escape(string $value, string $ignore = '', int $flags = 0)
     {
         return ldap_escape($value, $ignore, $flags);
     }

app/Auth/Access/LdapService.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 use BookStack\Auth\User;
 use BookStack\Exceptions\JsonDebugException;
@@ -13,7 +15,6 @@ use Illuminate\Support\Facades\Log;
  */
 class LdapService extends ExternalAuthService
 {
-
     protected $ldap;
     protected $ldapConnection;
     protected $userAvatars;
@@ -33,6 +34,7 @@ class LdapService extends ExternalAuthService
 
     /**
      * Check if groups should be synced.
+     *
      * @return bool
      */
     public function shouldSyncGroups()
@@ -42,6 +44,7 @@ class LdapService extends ExternalAuthService
 
     /**
      * Search for attributes for a specific user on the ldap.
+     *
      * @throws LdapException
      */
     private function getUserWithAttributes(string $userName, array $attributes): ?array
@@ -73,6 +76,7 @@ class LdapService extends ExternalAuthService
     /**
      * Get the details of a user from LDAP using the given username.
      * User found via configurable user filter.
+     *
      * @throws LdapException
      */
     public function getUserDetails(string $userName): ?array
@@ -92,16 +96,16 @@ class LdapService extends ExternalAuthService
 
         $userCn = $this->getUserResponseProperty($user, 'cn', null);
         $formatted = [
-            'uid' => $this->getUserResponseProperty($user, $idAttr, $user['dn']),
-            'name' => $this->getUserResponseProperty($user, $displayNameAttr, $userCn),
-            'dn' => $user['dn'],
+            'uid'   => $this->getUserResponseProperty($user, $idAttr, $user['dn']),
+            'name'  => $this->getUserResponseProperty($user, $displayNameAttr, $userCn),
+            'dn'    => $user['dn'],
             'email' => $this->getUserResponseProperty($user, $emailAttr, null),
             'avatar'=> $thumbnailAttr ? $this->getUserResponseProperty($user, $thumbnailAttr, null) : null,
         ];
 
         if ($this->config['dump_user_details']) {
             throw new JsonDebugException([
-                'details_from_ldap' => $user,
+                'details_from_ldap'        => $user,
                 'details_bookstack_parsed' => $formatted,
             ]);
         }
@@ -137,6 +141,7 @@ class LdapService extends ExternalAuthService
 
     /**
      * Check if the given credentials are valid for the given user.
+     *
      * @throws LdapException
      */
     public function validateUserCredentials(?array $ldapUserDetails, string $password): bool
@@ -146,6 +151,7 @@ class LdapService extends ExternalAuthService
         }
 
         $ldapConnection = $this->getConnection();
+
         try {
             $ldapBind = $this->ldap->bind($ldapConnection, $ldapUserDetails['dn'], $password);
         } catch (ErrorException $e) {
@@ -158,7 +164,9 @@ class LdapService extends ExternalAuthService
     /**
      * Bind the system user to the LDAP connection using the given credentials
      * otherwise anonymous access is attempted.
+     *
      * @param $connection
+     *
      * @throws LdapException
      */
     protected function bindSystemUser($connection)
@@ -181,8 +189,10 @@ class LdapService extends ExternalAuthService
     /**
      * Get the connection to the LDAP server.
      * Creates a new connection if one does not exist.
-     * @return resource
+     *
      * @throws LdapException
+     *
+     * @return resource
      */
     protected function getConnection()
     {
@@ -222,6 +232,7 @@ class LdapService extends ExternalAuthService
         }
 
         $this->ldapConnection = $ldapConnection;
+
         return $this->ldapConnection;
     }
 
@@ -241,6 +252,7 @@ class LdapService extends ExternalAuthService
         // Otherwise, extract the port out
         $hostName = $serverNameParts[0];
         $ldapPort = (count($serverNameParts) > 1) ? intval($serverNameParts[1]) : 389;
+
         return ['host' => $hostName, 'port' => $ldapPort];
     }
 
@@ -254,11 +266,13 @@ class LdapService extends ExternalAuthService
             $newKey = '${' . $key . '}';
             $newAttrs[$newKey] = $this->ldap->escape($attrText);
         }
+
         return strtr($filterString, $newAttrs);
     }
 
     /**
      * Get the groups a user is a part of on ldap.
+     *
      * @throws LdapException
      */
     public function getUserGroups(string $userName): array
@@ -272,11 +286,13 @@ class LdapService extends ExternalAuthService
 
         $userGroups = $this->groupFilter($user);
         $userGroups = $this->getGroupsRecursive($userGroups, []);
+
         return $userGroups;
     }
 
     /**
      * Get the parent groups of an array of groups.
+     *
      * @throws LdapException
      */
     private function getGroupsRecursive(array $groupsArray, array $checked): array
@@ -303,6 +319,7 @@ class LdapService extends ExternalAuthService
 
     /**
      * Get the parent groups of a single group.
+     *
      * @throws LdapException
      */
     private function getGroupGroups(string $groupName): array
@@ -336,7 +353,7 @@ class LdapService extends ExternalAuthService
         $count = 0;
 
         if (isset($userGroupSearchResponse[$groupsAttr]['count'])) {
-            $count = (int)$userGroupSearchResponse[$groupsAttr]['count'];
+            $count = (int) $userGroupSearchResponse[$groupsAttr]['count'];
         }
 
         for ($i = 0; $i < $count; $i++) {
@@ -351,6 +368,7 @@ class LdapService extends ExternalAuthService
 
     /**
      * Sync the LDAP groups to the user roles for the current user.
+     *
      * @throws LdapException
      */
     public function syncGroups(User $user, string $username)

app/Auth/Access/LoginService.php

@@ -0,0 +1,164 @@
+<?php
+
+namespace BookStack\Auth\Access;
+
+use BookStack\Actions\ActivityType;
+use BookStack\Auth\Access\Mfa\MfaSession;
+use BookStack\Auth\User;
+use BookStack\Exceptions\StoppedAuthenticationException;
+use BookStack\Facades\Activity;
+use BookStack\Facades\Theme;
+use BookStack\Theming\ThemeEvents;
+use Exception;
+
+class LoginService
+{
+    protected const LAST_LOGIN_ATTEMPTED_SESSION_KEY = 'auth-login-last-attempted';
+
+    protected $mfaSession;
+    protected $emailConfirmationService;
+
+    public function __construct(MfaSession $mfaSession, EmailConfirmationService $emailConfirmationService)
+    {
+        $this->mfaSession = $mfaSession;
+        $this->emailConfirmationService = $emailConfirmationService;
+    }
+
+    /**
+     * Log the given user into the system.
+     * Will start a login of the given user but will prevent if there's
+     * a reason to (MFA or Unconfirmed Email).
+     * Returns a boolean to indicate the current login result.
+     *
+     * @throws StoppedAuthenticationException
+     */
+    public function login(User $user, string $method, bool $remember = false): void
+    {
+        if ($this->awaitingEmailConfirmation($user) || $this->needsMfaVerification($user)) {
+            $this->setLastLoginAttemptedForUser($user, $method, $remember);
+
+            throw new StoppedAuthenticationException($user, $this);
+        }
+
+        $this->clearLastLoginAttempted();
+        auth()->login($user, $remember);
+        Activity::add(ActivityType::AUTH_LOGIN, "{$method}; {$user->logDescriptor()}");
+        Theme::dispatch(ThemeEvents::AUTH_LOGIN, $method, $user);
+
+        // Authenticate on all session guards if a likely admin
+        if ($user->can('users-manage') && $user->can('user-roles-manage')) {
+            $guards = ['standard', 'ldap', 'saml2'];
+            foreach ($guards as $guard) {
+                auth($guard)->login($user);
+            }
+        }
+    }
+
+    /**
+     * Reattempt a system login after a previous stopped attempt.
+     *
+     * @throws Exception
+     */
+    public function reattemptLoginFor(User $user)
+    {
+        if ($user->id !== ($this->getLastLoginAttemptUser()->id ?? null)) {
+            throw new Exception('Login reattempt user does align with current session state');
+        }
+
+        $lastLoginDetails = $this->getLastLoginAttemptDetails();
+        $this->login($user, $lastLoginDetails['method'], $lastLoginDetails['remember'] ?? false);
+    }
+
+    /**
+     * Get the last user that was attempted to be logged in.
+     * Only exists if the last login attempt had correct credentials
+     * but had been prevented by a secondary factor.
+     */
+    public function getLastLoginAttemptUser(): ?User
+    {
+        $id = $this->getLastLoginAttemptDetails()['user_id'];
+
+        return User::query()->where('id', '=', $id)->first();
+    }
+
+    /**
+     * Get the details of the last login attempt.
+     * Checks upon a ttl of about 1 hour since that last attempted login.
+     *
+     * @return array{user_id: ?string, method: ?string, remember: bool}
+     */
+    protected function getLastLoginAttemptDetails(): array
+    {
+        $value = session()->get(self::LAST_LOGIN_ATTEMPTED_SESSION_KEY);
+        if (!$value) {
+            return ['user_id' => null, 'method' => null];
+        }
+
+        [$id, $method, $remember, $time] = explode(':', $value);
+        $hourAgo = time() - (60 * 60);
+        if ($time < $hourAgo) {
+            $this->clearLastLoginAttempted();
+
+            return ['user_id' => null, 'method' => null];
+        }
+
+        return ['user_id' => $id, 'method' => $method, 'remember' => boolval($remember)];
+    }
+
+    /**
+     * Set the last login attempted user.
+     * Must be only used when credentials are correct and a login could be
+     * achieved but a secondary factor has stopped the login.
+     */
+    protected function setLastLoginAttemptedForUser(User $user, string $method, bool $remember)
+    {
+        session()->put(
+            self::LAST_LOGIN_ATTEMPTED_SESSION_KEY,
+            implode(':', [$user->id, $method, $remember, time()])
+        );
+    }
+
+    /**
+     * Clear the last login attempted session value.
+     */
+    protected function clearLastLoginAttempted(): void
+    {
+        session()->remove(self::LAST_LOGIN_ATTEMPTED_SESSION_KEY);
+    }
+
+    /**
+     * Check if MFA verification is needed.
+     */
+    public function needsMfaVerification(User $user): bool
+    {
+        return !$this->mfaSession->isVerifiedForUser($user) && $this->mfaSession->isRequiredForUser($user);
+    }
+
+    /**
+     * Check if the given user is awaiting email confirmation.
+     */
+    public function awaitingEmailConfirmation(User $user): bool
+    {
+        return $this->emailConfirmationService->confirmationRequired() && !$user->email_confirmed;
+    }
+
+    /**
+     * Attempt the login of a user using the given credentials.
+     * Meant to mirror Laravel's default guard 'attempt' method
+     * but in a manner that always routes through our login system.
+     * May interrupt the flow if extra authentication requirements are imposed.
+     *
+     * @throws StoppedAuthenticationException
+     */
+    public function attempt(array $credentials, string $method, bool $remember = false): bool
+    {
+        $result = auth()->attempt($credentials, $remember);
+        if ($result) {
+            $user = auth()->user();
+            auth()->logout();
+            $this->login($user, $method, $remember);
+        }
+
+        return $result;
+    }
+}

app/Auth/Access/Mfa/BackupCodeService.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use Illuminate\Support\Str;
+
+class BackupCodeService
+{
+    /**
+     * Generate a new set of 16 backup codes.
+     */
+    public function generateNewSet(): array
+    {
+        $codes = [];
+        while (count($codes) < 16) {
+            $code = Str::random(5) . '-' . Str::random(5);
+            if (!in_array($code, $codes)) {
+                $codes[] = strtolower($code);
+            }
+        }
+
+        return $codes;
+    }
+
+    /**
+     * Check if the given code matches one of the available options.
+     */
+    public function inputCodeExistsInSet(string $code, string $codeSet): bool
+    {
+        $cleanCode = $this->cleanInputCode($code);
+        $codes = json_decode($codeSet);
+
+        return in_array($cleanCode, $codes);
+    }
+
+    /**
+     * Remove the given input code from the given available options.
+     * Will return a JSON string containing the codes.
+     */
+    public function removeInputCodeFromSet(string $code, string $codeSet): string
+    {
+        $cleanCode = $this->cleanInputCode($code);
+        $codes = json_decode($codeSet);
+        $pos = array_search($cleanCode, $codes, true);
+        array_splice($codes, $pos, 1);
+
+        return json_encode($codes);
+    }
+
+    /**
+     * Count the number of codes in the given set.
+     */
+    public function countCodesInSet(string $codeSet): int
+    {
+        return count(json_decode($codeSet));
+    }
+
+    protected function cleanInputCode(string $code): string
+    {
+        return strtolower(str_replace(' ', '-', trim($code)));
+    }
+}

app/Auth/Access/Mfa/MfaSession.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use BookStack\Auth\User;
+
+class MfaSession
+{
+    /**
+     * Check if MFA is required for the given user.
+     */
+    public function isRequiredForUser(User $user): bool
+    {
+        // TODO - Test both these cases
+        return $user->mfaValues()->exists() || $this->userRoleEnforcesMfa($user);
+    }
+
+    /**
+     * Check if the given user is pending MFA setup.
+     * (MFA required but not yet configured).
+     */
+    public function isPendingMfaSetup(User $user): bool
+    {
+        return $this->isRequiredForUser($user) && !$user->mfaValues()->exists();
+    }
+
+    /**
+     * Check if a role of the given user enforces MFA.
+     */
+    protected function userRoleEnforcesMfa(User $user): bool
+    {
+        return $user->roles()
+            ->where('mfa_enforced', '=', true)
+            ->exists();
+    }
+
+    /**
+     * Check if the current MFA session has already been verified for the given user.
+     */
+    public function isVerifiedForUser(User $user): bool
+    {
+        return session()->get($this->getMfaVerifiedSessionKey($user)) === 'true';
+    }
+
+    /**
+     * Mark the current session as MFA-verified.
+     */
+    public function markVerifiedForUser(User $user): void
+    {
+        session()->put($this->getMfaVerifiedSessionKey($user), 'true');
+    }
+
+    /**
+     * Get the session key in which the MFA verification status is stored.
+     */
+    protected function getMfaVerifiedSessionKey(User $user): string
+    {
+        return 'mfa-verification-passed:' . $user->id;
+    }
+}

app/Auth/Access/Mfa/MfaValue.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use BookStack\Auth\User;
+use Carbon\Carbon;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @property int    $id
+ * @property int    $user_id
+ * @property string $method
+ * @property string $value
+ * @property Carbon $created_at
+ * @property Carbon $updated_at
+ */
+class MfaValue extends Model
+{
+    protected static $unguarded = true;
+
+    const METHOD_TOTP = 'totp';
+    const METHOD_BACKUP_CODES = 'backup_codes';
+
+    /**
+     * Get all the MFA methods available.
+     */
+    public static function allMethods(): array
+    {
+        return [self::METHOD_TOTP, self::METHOD_BACKUP_CODES];
+    }
+
+    /**
+     * Upsert a new MFA value for the given user and method
+     * using the provided value.
+     */
+    public static function upsertWithValue(User $user, string $method, string $value): void
+    {
+        /** @var MfaValue $mfaVal */
+        $mfaVal = static::query()->firstOrNew([
+            'user_id' => $user->id,
+            'method'  => $method,
+        ]);
+        $mfaVal->setValue($value);
+        $mfaVal->save();
+    }
+
+    /**
+     * Easily get the decrypted MFA value for the given user and method.
+     */
+    public static function getValueForUser(User $user, string $method): ?string
+    {
+        /** @var MfaValue $mfaVal */
+        $mfaVal = static::query()
+            ->where('user_id', '=', $user->id)
+            ->where('method', '=', $method)
+            ->first();
+
+        return $mfaVal ? $mfaVal->getValue() : null;
+    }
+
+    /**
+     * Decrypt the value attribute upon access.
+     */
+    protected function getValue(): string
+    {
+        return decrypt($this->value);
+    }
+
+    /**
+     * Encrypt the value attribute upon access.
+     */
+    protected function setValue($value): void
+    {
+        $this->value = encrypt($value);
+    }
+}

app/Auth/Access/Mfa/TotpService.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use BaconQrCode\Renderer\Color\Rgb;
+use BaconQrCode\Renderer\Image\SvgImageBackEnd;
+use BaconQrCode\Renderer\ImageRenderer;
+use BaconQrCode\Renderer\RendererStyle\Fill;
+use BaconQrCode\Renderer\RendererStyle\RendererStyle;
+use BaconQrCode\Writer;
+use PragmaRX\Google2FA\Google2FA;
+use PragmaRX\Google2FA\Support\Constants;
+
+class TotpService
+{
+    protected $google2fa;
+
+    public function __construct(Google2FA $google2fa)
+    {
+        $this->google2fa = $google2fa;
+        // Use SHA1 as a default, Personal testing of other options in 2021 found
+        // many apps lack support for other algorithms yet still will scan
+        // the code causing a confusing UX.
+        $this->google2fa->setAlgorithm(Constants::SHA1);
+    }
+
+    /**
+     * Generate a new totp secret key.
+     */
+    public function generateSecret(): string
+    {
+        /** @noinspection PhpUnhandledExceptionInspection */
+        return $this->google2fa->generateSecretKey();
+    }
+
+    /**
+     * Generate a TOTP URL from secret key.
+     */
+    public function generateUrl(string $secret): string
+    {
+        return $this->google2fa->getQRCodeUrl(
+            setting('app-name'),
+            user()->email,
+            $secret
+        );
+    }
+
+    /**
+     * Generate a QR code to display a TOTP URL.
+     */
+    public function generateQrCodeSvg(string $url): string
+    {
+        $color = Fill::uniformColor(new Rgb(255, 255, 255), new Rgb(32, 110, 167));
+
+        return (new Writer(
+            new ImageRenderer(
+                new RendererStyle(192, 0, null, null, $color),
+                new SvgImageBackEnd()
+            )
+        ))->writeString($url);
+    }
+
+    /**
+     * Verify that the user provided code is valid for the secret.
+     * The secret must be known, not user-provided.
+     */
+    public function verifyCode(string $code, string $secret): bool
+    {
+        /** @noinspection PhpUnhandledExceptionInspection */
+        return $this->google2fa->verifyKey($secret, $code);
+    }
+}

app/Auth/Access/Mfa/TotpValidationRule.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace BookStack\Auth\Access\Mfa;
+
+use Illuminate\Contracts\Validation\Rule;
+
+class TotpValidationRule implements Rule
+{
+    protected $secret;
+    protected $totpService;
+
+    /**
+     * Create a new rule instance.
+     * Takes the TOTP secret that must be system provided, not user provided.
+     */
+    public function __construct(string $secret)
+    {
+        $this->secret = $secret;
+        $this->totpService = app()->make(TotpService::class);
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     */
+    public function passes($attribute, $value)
+    {
+        return $this->totpService->verifyCode($value, $this->secret);
+    }
+
+    /**
+     * Get the validation error message.
+     */
+    public function message()
+    {
+        return trans('validation.totp');
+    }
+}

app/Auth/Access/RegistrationService.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Auth\SocialAccount;
@@ -12,7 +14,6 @@ use Exception;
 
 class RegistrationService
 {
-
     protected $userRepo;
     protected $emailConfirmationService;
 
@@ -27,6 +28,7 @@ class RegistrationService
 
     /**
      * Check whether or not registrations are allowed in the app settings.
+     *
      * @throws UserRegistrationException
      */
     public function ensureRegistrationAllowed()
@@ -44,11 +46,13 @@ class RegistrationService
     {
         $authMethod = config('auth.method');
         $authMethodsWithRegistration = ['standard'];
+
         return in_array($authMethod, $authMethodsWithRegistration) && setting('registration-enabled');
     }
 
     /**
      * The registrations flow for all users.
+     *
      * @throws UserRegistrationException
      */
     public function registerUser(array $userData, ?SocialAccount $socialAccount = null, bool $emailConfirmed = false): User
@@ -84,6 +88,7 @@ class RegistrationService
                 session()->flash('sent-email-confirmation', true);
             } catch (Exception $e) {
                 $message = trans('auth.email_confirm_send_error');
+
                 throw new UserRegistrationException($message, '/register/confirm');
             }
         }
@@ -94,6 +99,7 @@ class RegistrationService
     /**
      * Ensure that the given email meets any active email domain registration restrictions.
      * Throws if restrictions are active and the email does not match an allowed domain.
+     *
      * @throws UserRegistrationException
      */
     protected function ensureEmailDomainAllowed(string $userEmail): void
@@ -105,9 +111,10 @@ class RegistrationService
         }
 
         $restrictedEmailDomains = explode(',', str_replace(' ', '', $registrationRestrict));
-        $userEmailDomain = $domain = mb_substr(mb_strrchr($userEmail, "@"), 1);
+        $userEmailDomain = $domain = mb_substr(mb_strrchr($userEmail, '@'), 1);
         if (!in_array($userEmailDomain, $restrictedEmailDomains)) {
             $redirect = $this->registrationAllowed() ? '/register' : '/login';
+
             throw new UserRegistrationException(trans('auth.registration_email_domain_invalid'), $redirect);
         }
     }

app/Auth/Access/Saml2Service.php

@@ -1,13 +1,12 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
-use BookStack\Actions\ActivityType;
 use BookStack\Auth\User;
 use BookStack\Exceptions\JsonDebugException;
 use BookStack\Exceptions\SamlException;
+use BookStack\Exceptions\StoppedAuthenticationException;
 use BookStack\Exceptions\UserRegistrationException;
-use BookStack\Facades\Activity;
-use BookStack\Facades\Theme;
-use BookStack\Theming\ThemeEvents;
 use Exception;
 use Illuminate\Support\Str;
 use OneLogin\Saml2\Auth;
@@ -23,34 +22,37 @@ class Saml2Service extends ExternalAuthService
 {
     protected $config;
     protected $registrationService;
-    protected $user;
+    protected $loginService;
 
     /**
      * Saml2Service constructor.
      */
-    public function __construct(RegistrationService $registrationService, User $user)
+    public function __construct(RegistrationService $registrationService, LoginService $loginService)
     {
         $this->config = config('saml2');
         $this->registrationService = $registrationService;
-        $this->user = $user;
+        $this->loginService = $loginService;
     }
 
     /**
      * Initiate a login flow.
+     *
      * @throws Error
      */
     public function login(): array
     {
         $toolKit = $this->getToolkit();
         $returnRoute = url('/saml2/acs');
+
         return [
             'url' => $toolKit->login($returnRoute, [], false, false, true),
-            'id' => $toolKit->getLastRequestID(),
+            'id'  => $toolKit->getLastRequestID(),
         ];
     }
 
     /**
      * Initiate a logout flow.
+     *
      * @throws Error
      */
     public function logout(): array
@@ -78,6 +80,7 @@ class Saml2Service extends ExternalAuthService
      * Process the ACS response from the idp and return the
      * matching, or new if registration active, user matched to the idp.
      * Returns null if not authenticated.
+     *
      * @throws Error
      * @throws SamlException
      * @throws ValidationError
@@ -92,7 +95,7 @@ class Saml2Service extends ExternalAuthService
 
         if (!empty($errors)) {
             throw new Error(
-                'Invalid ACS Response: '.implode(', ', $errors)
+                'Invalid ACS Response: ' . implode(', ', $errors)
             );
         }
 
@@ -108,6 +111,7 @@ class Saml2Service extends ExternalAuthService
 
     /**
      * Process a response for the single logout service.
+     *
      * @throws Error
      */
     public function processSlsResponse(?string $requestId): ?string
@@ -119,11 +123,12 @@ class Saml2Service extends ExternalAuthService
 
         if (!empty($errors)) {
             throw new Error(
-                'Invalid SLS Response: '.implode(', ', $errors)
+                'Invalid SLS Response: ' . implode(', ', $errors)
             );
         }
 
         $this->actionLogout();
+
         return $redirect;
     }
 
@@ -138,6 +143,7 @@ class Saml2Service extends ExternalAuthService
 
     /**
      * Get the metadata for this service provider.
+     *
      * @throws Error
      */
     public function metadata(): string
@@ -149,7 +155,7 @@ class Saml2Service extends ExternalAuthService
 
         if (!empty($errors)) {
             throw new Error(
-                'Invalid SP metadata: '.implode(', ', $errors),
+                'Invalid SP metadata: ' . implode(', ', $errors),
                 Error::METADATA_SP_INVALID
             );
         }
@@ -159,6 +165,7 @@ class Saml2Service extends ExternalAuthService
 
     /**
      * Load the underlying Onelogin SAML2 toolkit.
+     *
      * @throws Error
      * @throws Exception
      */
@@ -178,6 +185,7 @@ class Saml2Service extends ExternalAuthService
 
         $spSettings = $this->loadOneloginServiceProviderDetails();
         $settings = array_replace_recursive($settings, $spSettings, $metaDataSettings, $overrides);
+
         return new Auth($settings);
     }
 
@@ -187,18 +195,18 @@ class Saml2Service extends ExternalAuthService
     protected function loadOneloginServiceProviderDetails(): array
     {
         $spDetails = [
-            'entityId' => url('/saml2/metadata'),
+            'entityId'                 => url('/saml2/metadata'),
             'assertionConsumerService' => [
                 'url' => url('/saml2/acs'),
             ],
             'singleLogoutService' => [
-                'url' => url('/saml2/sls')
+                'url' => url('/saml2/sls'),
             ],
         ];
 
         return [
             'baseurl' => url('/saml2'),
-            'sp' => $spDetails
+            'sp'      => $spDetails,
         ];
     }
 
@@ -211,7 +219,7 @@ class Saml2Service extends ExternalAuthService
     }
 
     /**
-     * Calculate the display name
+     * Calculate the display name.
      */
     protected function getUserDisplayName(array $samlAttributes, string $defaultValue): string
     {
@@ -261,9 +269,9 @@ class Saml2Service extends ExternalAuthService
 
         return [
             'external_id' => $externalId,
-            'name' => $this->getUserDisplayName($samlAttributes, $externalId),
-            'email' => $email,
-            'saml_id' => $samlID,
+            'name'        => $this->getUserDisplayName($samlAttributes, $externalId),
+            'email'       => $email,
+            'saml_id'     => $samlID,
         ];
     }
 
@@ -297,6 +305,7 @@ class Saml2Service extends ExternalAuthService
                 $data = $data[0];
                 break;
         }
+
         return $data;
     }
 
@@ -315,19 +324,20 @@ class Saml2Service extends ExternalAuthService
 
     /**
      * Get the user from the database for the specified details.
+     *
      * @throws UserRegistrationException
      */
     protected function getOrRegisterUser(array $userDetails): ?User
     {
-        $user = $this->user->newQuery()
+        $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),
+                'name'             => $userDetails['name'],
+                'email'            => $userDetails['email'],
+                'password'         => Str::random(32),
                 'external_auth_id' => $userDetails['external_id'],
             ];
 
@@ -340,9 +350,11 @@ class Saml2Service extends ExternalAuthService
     /**
      * Process the SAML response for a user. Login the user when
      * they exist, optionally registering them automatically.
+     *
      * @throws SamlException
      * @throws JsonDebugException
      * @throws UserRegistrationException
+     * @throws StoppedAuthenticationException
      */
     public function processLoginCallback(string $samlID, array $samlAttributes): User
     {
@@ -351,8 +363,8 @@ class Saml2Service extends ExternalAuthService
 
         if ($this->config['dump_user_details']) {
             throw new JsonDebugException([
-                'id_from_idp' => $samlID,
-                'attrs_from_idp' => $samlAttributes,
+                'id_from_idp'         => $samlID,
+                'attrs_from_idp'      => $samlAttributes,
                 'attrs_after_parsing' => $userDetails,
             ]);
         }
@@ -375,9 +387,8 @@ class Saml2Service extends ExternalAuthService
             $this->syncWithGroups($user, $groups);
         }
 
-        auth()->login($user);
-        Activity::add(ActivityType::AUTH_LOGIN, "saml2; {$user->logDescriptor()}");
-        Theme::dispatch(ThemeEvents::AUTH_LOGIN, 'saml2', $user);
+        $this->loginService->login($user, 'saml2');
+
         return $user;
     }
 }

app/Auth/Access/SocialAuthService.php

@@ -1,14 +1,12 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
-use BookStack\Actions\ActivityType;
 use BookStack\Auth\SocialAccount;
 use BookStack\Auth\User;
 use BookStack\Exceptions\SocialDriverNotConfigured;
 use BookStack\Exceptions\SocialSignInAccountNotUsed;
 use BookStack\Exceptions\UserRegistrationException;
-use BookStack\Facades\Activity;
-use BookStack\Facades\Theme;
-use BookStack\Theming\ThemeEvents;
 use Illuminate\Support\Facades\Event;
 use Illuminate\Support\Str;
 use Laravel\Socialite\Contracts\Factory as Socialite;
@@ -21,12 +19,19 @@ class SocialAuthService
 {
     /**
      * The core socialite library used.
+     *
      * @var Socialite
      */
     protected $socialite;
 
+    /**
+     * @var LoginService
+     */
+    protected $loginService;
+
     /**
      * The default built-in social drivers we support.
+     *
      * @var string[]
      */
     protected $validSocialDrivers = [
@@ -39,7 +44,7 @@ class SocialAuthService
         'okta',
         'gitlab',
         'twitch',
-        'discord'
+        'discord',
     ];
 
     /**
@@ -47,6 +52,7 @@ class SocialAuthService
      * for an initial redirect action.
      * Array is keyed by social driver name.
      * Callbacks are passed an instance of the driver.
+     *
      * @var array<string, callable>
      */
     protected $configureForRedirectCallbacks = [];
@@ -54,33 +60,39 @@ class SocialAuthService
     /**
      * SocialAuthService constructor.
      */
-    public function __construct(Socialite $socialite)
+    public function __construct(Socialite $socialite, LoginService $loginService)
     {
         $this->socialite = $socialite;
+        $this->loginService = $loginService;
     }
 
     /**
      * Start the social login path.
+     *
      * @throws SocialDriverNotConfigured
      */
     public function startLogIn(string $socialDriver): RedirectResponse
     {
         $driver = $this->validateDriver($socialDriver);
+
         return $this->getDriverForRedirect($driver)->redirect();
     }
 
     /**
-     * Start the social registration process
+     * Start the social registration process.
+     *
      * @throws SocialDriverNotConfigured
      */
     public function startRegister(string $socialDriver): RedirectResponse
     {
         $driver = $this->validateDriver($socialDriver);
+
         return $this->getDriverForRedirect($driver)->redirect();
     }
 
     /**
      * Handle the social registration process on callback.
+     *
      * @throws UserRegistrationException
      */
     public function handleRegistrationCallback(string $socialDriver, SocialUser $socialUser): SocialUser
@@ -92,6 +104,7 @@ class SocialAuthService
 
         if (User::query()->where('email', '=', $socialUser->getEmail())->exists()) {
             $email = $socialUser->getEmail();
+
             throw new UserRegistrationException(trans('errors.error_user_exists_different_creds', ['email' => $email]), '/login');
         }
 
@@ -100,16 +113,19 @@ class SocialAuthService
 
     /**
      * Get the social user details via the social driver.
+     *
      * @throws SocialDriverNotConfigured
      */
     public function getSocialUser(string $socialDriver): SocialUser
     {
         $driver = $this->validateDriver($socialDriver);
+
         return $this->socialite->driver($driver)->user();
     }
 
     /**
      * Handle the login process on a oAuth callback.
+     *
      * @throws SocialSignInAccountNotUsed
      */
     public function handleLoginCallback(string $socialDriver, SocialUser $socialUser)
@@ -125,9 +141,8 @@ class SocialAuthService
         // When a user is not logged in and a matching SocialAccount exists,
         // Simply log the user into the application.
         if (!$isLoggedIn && $socialAccount !== null) {
-            auth()->login($socialAccount->user);
-            Activity::add(ActivityType::AUTH_LOGIN, $socialAccount);
-            Theme::dispatch(ThemeEvents::AUTH_LOGIN, $socialDriver, $socialAccount->user);
+            $this->loginService->login($socialAccount->user, $socialAccount);
+
             return redirect()->intended('/');
         }
 
@@ -137,18 +152,21 @@ class SocialAuthService
             $account = $this->newSocialAccount($socialDriver, $socialUser);
             $currentUser->socialAccounts()->save($account);
             session()->flash('success', trans('settings.users_social_connected', ['socialAccount' => $titleCaseDriver]));
+
             return redirect($currentUser->getEditUrl());
         }
 
         // When a user is logged in and the social account exists and is already linked to the current user.
         if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id === $currentUser->id) {
             session()->flash('error', trans('errors.social_account_existing', ['socialAccount' => $titleCaseDriver]));
+
             return redirect($currentUser->getEditUrl());
         }
 
         // When a user is logged in, A social account exists but the users do not match.
         if ($isLoggedIn && $socialAccount !== null && $socialAccount->user->id != $currentUser->id) {
             session()->flash('error', trans('errors.social_account_already_used_existing', ['socialAccount' => $titleCaseDriver]));
+
             return redirect($currentUser->getEditUrl());
         }
 
@@ -163,6 +181,7 @@ class SocialAuthService
 
     /**
      * Ensure the social driver is correct and supported.
+     *
      * @throws SocialDriverNotConfigured
      */
     protected function validateDriver(string $socialDriver): string
@@ -188,6 +207,7 @@ class SocialAuthService
         $lowerName = strtolower($driver);
         $configPrefix = 'services.' . $lowerName . '.';
         $config = [config($configPrefix . 'client_id'), config($configPrefix . 'client_secret'), config('services.callback_url')];
+
         return !in_array(false, $config) && !in_array(null, $config);
     }
 
@@ -237,9 +257,9 @@ class SocialAuthService
     public function newSocialAccount(string $socialDriver, SocialUser $socialUser): SocialAccount
     {
         return new SocialAccount([
-            'driver' => $socialDriver,
+            'driver'    => $socialDriver,
             'driver_id' => $socialUser->getId(),
-            'avatar' => $socialUser->getAvatar()
+            'avatar'    => $socialUser->getAvatar(),
         ]);
     }
 
@@ -252,7 +272,7 @@ class SocialAuthService
     }
 
     /**
-     * Provide redirect options per service for the Laravel Socialite driver
+     * Provide redirect options per service for the Laravel Socialite driver.
      */
     protected function getDriverForRedirect(string $driverName): Provider
     {

app/Auth/Access/UserInviteService.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 use BookStack\Auth\User;
 use BookStack\Notifications\UserInvite;
@@ -11,6 +13,7 @@ class UserInviteService extends UserTokenService
     /**
      * Send an invitation to a user to sign into BookStack
      * Removes existing invitation tokens.
+     *
      * @param User $user
      */
     public function sendInvitation(User $user)

app/Auth/Access/UserTokenService.php

@@ -1,59 +1,56 @@
-<?php namespace BookStack\Auth\Access;
+<?php
+
+namespace BookStack\Auth\Access;
 
 use BookStack\Auth\User;
 use BookStack\Exceptions\UserTokenExpiredException;
 use BookStack\Exceptions\UserTokenNotFoundException;
 use Carbon\Carbon;
-use Illuminate\Database\Connection as Database;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Str;
 use stdClass;
 
 class UserTokenService
 {
-
     /**
      * Name of table where user tokens are stored.
+     *
      * @var string
      */
     protected $tokenTable = 'user_tokens';
 
     /**
      * Token expiry time in hours.
+     *
      * @var int
      */
     protected $expiryTime = 24;
 
-    protected $db;
-
-    /**
-     * UserTokenService constructor.
-     * @param Database $db
-     */
-    public function __construct(Database $db)
-    {
-        $this->db = $db;
-    }
-
     /**
      * Delete all email confirmations that belong to a user.
+     *
      * @param User $user
+     *
      * @return mixed
      */
     public function deleteByUser(User $user)
     {
-        return $this->db->table($this->tokenTable)
+        return DB::table($this->tokenTable)
             ->where('user_id', '=', $user->id)
             ->delete();
     }
 
     /**
      * Get the user id from a token, while check the token exists and has not expired.
+     *
      * @param string $token
-     * @return int
+     *
      * @throws UserTokenNotFoundException
      * @throws UserTokenExpiredException
+     *
+     * @return int
      */
-    public function checkTokenAndGetUserId(string $token) : int
+    public function checkTokenAndGetUserId(string $token): int
     {
         $entry = $this->getEntryByToken($token);
 
@@ -70,63 +67,74 @@ class UserTokenService
 
     /**
      * Creates a unique token within the email confirmation database.
+     *
      * @return string
      */
-    protected function generateToken() : string
+    protected function generateToken(): string
     {
         $token = Str::random(24);
         while ($this->tokenExists($token)) {
             $token = Str::random(25);
         }
+
         return $token;
     }
 
     /**
      * Generate and store a token for the given user.
+     *
      * @param User $user
+     *
      * @return string
      */
-    protected function createTokenForUser(User $user) : string
+    protected function createTokenForUser(User $user): string
     {
         $token = $this->generateToken();
-        $this->db->table($this->tokenTable)->insert([
-            'user_id' => $user->id,
-            'token' => $token,
+        DB::table($this->tokenTable)->insert([
+            'user_id'    => $user->id,
+            'token'      => $token,
             'created_at' => Carbon::now(),
-            'updated_at' => Carbon::now()
+            'updated_at' => Carbon::now(),
         ]);
+
         return $token;
     }
 
     /**
      * Check if the given token exists.
+     *
      * @param string $token
+     *
      * @return bool
      */
-    protected function tokenExists(string $token) : bool
+    protected function tokenExists(string $token): bool
     {
-        return $this->db->table($this->tokenTable)
+        return DB::table($this->tokenTable)
             ->where('token', '=', $token)->exists();
     }
 
     /**
      * Get a token entry for the given token.
+     *
      * @param string $token
+     *
      * @return object|null
      */
     protected function getEntryByToken(string $token)
     {
-        return $this->db->table($this->tokenTable)
+        return DB::table($this->tokenTable)
             ->where('token', '=', $token)
             ->first();
     }
 
     /**
      * Check if the given token entry has expired.
+     *
      * @param stdClass $tokenEntry
+     *
      * @return bool
      */
-    protected function entryExpired(stdClass $tokenEntry) : bool
+    protected function entryExpired(stdClass $tokenEntry): bool
     {
         return Carbon::now()->subHours($this->expiryTime)
             ->gt(new Carbon($tokenEntry->created_at));

app/Auth/Permissions/EntityPermission.php

@@ -1,15 +1,17 @@
-<?php namespace BookStack\Auth\Permissions;
+<?php
+
+namespace BookStack\Auth\Permissions;
 
 use BookStack\Model;
 
 class EntityPermission extends Model
 {
-
     protected $fillable = ['role_id', 'action'];
     public $timestamps = false;
 
     /**
      * Get all this restriction's attached entity.
+     *
      * @return \Illuminate\Database\Eloquent\Relations\MorphTo
      */
     public function restrictable()

app/Auth/Permissions/JointPermission.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Permissions;
+<?php
+
+namespace BookStack\Auth\Permissions;
 
 use BookStack\Auth\Role;
 use BookStack\Entities\Models\Entity;

app/Auth/Permissions/PermissionService.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Permissions;
+<?php
+
+namespace BookStack\Auth\Permissions;
 
 use BookStack\Auth\Role;
 use BookStack\Auth\User;
@@ -48,7 +50,7 @@ class PermissionService
     }
 
     /**
-     * Set the database connection
+     * Set the database connection.
      */
     public function setConnection(Connection $connection)
     {
@@ -56,7 +58,8 @@ class PermissionService
     }
 
     /**
-     * Prepare the local entity cache and ensure it's empty
+     * Prepare the local entity cache and ensure it's empty.
+     *
      * @param Entity[] $entities
      */
     protected function readyEntityCache(array $entities = [])
@@ -73,7 +76,7 @@ class PermissionService
     }
 
     /**
-     * Get a book via ID, Checks local cache
+     * Get a book via ID, Checks local cache.
      */
     protected function getBook(int $bookId): ?Book
     {
@@ -85,7 +88,7 @@ class PermissionService
     }
 
     /**
-     * Get a chapter via ID, Checks local cache
+     * Get a chapter via ID, Checks local cache.
      */
     protected function getChapter(int $chapterId): ?Chapter
     {
@@ -151,12 +154,13 @@ class PermissionService
                 },
                 'pages' => function ($query) {
                     $query->withTrashed()->select(['id', 'restricted', 'owned_by', 'book_id', 'chapter_id']);
-                }
+                },
             ]);
     }
 
     /**
      * Build joint permissions for the given shelf and role combinations.
+     *
      * @throws Throwable
      */
     protected function buildJointPermissionsForShelves(EloquentCollection $shelves, array $roles, bool $deleteOld = false)
@@ -169,6 +173,7 @@ class PermissionService
 
     /**
      * Build joint permissions for the given book and role combinations.
+     *
      * @throws Throwable
      */
     protected function buildJointPermissionsForBooks(EloquentCollection $books, array $roles, bool $deleteOld = false)
@@ -193,6 +198,7 @@ class PermissionService
 
     /**
      * Rebuild the entity jointPermissions for a particular entity.
+     *
      * @throws Throwable
      */
     public function buildJointPermissionsForEntity(Entity $entity)
@@ -201,6 +207,7 @@ class PermissionService
         if ($entity instanceof Book) {
             $books = $this->bookFetchQuery()->where('id', '=', $entity->id)->get();
             $this->buildJointPermissionsForBooks($books, Role::query()->get()->all(), true);
+
             return;
         }
 
@@ -224,6 +231,7 @@ class PermissionService
 
     /**
      * Rebuild the entity jointPermissions for a collection of entities.
+     *
      * @throws Throwable
      */
     public function buildJointPermissionsForEntities(array $entities)
@@ -263,6 +271,7 @@ class PermissionService
 
     /**
      * Delete all of the entity jointPermissions for a list of entities.
+     *
      * @param Role[] $roles
      */
     protected function deleteManyJointPermissionsForRoles($roles)
@@ -275,7 +284,9 @@ class PermissionService
 
     /**
      * Delete the entity jointPermissions for a particular entity.
+     *
      * @param Entity $entity
+     *
      * @throws Throwable
      */
     public function deleteJointPermissionsForEntity(Entity $entity)
@@ -285,7 +296,9 @@ class PermissionService
 
     /**
      * Delete all of the entity jointPermissions for a list of entities.
+     *
      * @param Entity[] $entities
+     *
      * @throws Throwable
      */
     protected function deleteManyJointPermissionsForEntities(array $entities)
@@ -295,7 +308,6 @@ class PermissionService
         }
 
         $this->db->transaction(function () use ($entities) {
-
             foreach (array_chunk($entities, 1000) as $entityChunk) {
                 $query = $this->db->table('joint_permissions');
                 foreach ($entityChunk as $entity) {
@@ -311,8 +323,10 @@ class PermissionService
 
     /**
      * Create & Save entity jointPermissions for many entities and roles.
+     *
      * @param Entity[] $entities
-     * @param Role[] $roles
+     * @param Role[]   $roles
+     *
      * @throws Throwable
      */
     protected function createManyJointPermissions(array $entities, array $roles)
@@ -363,7 +377,6 @@ class PermissionService
         });
     }
 
-
     /**
      * Get the actions related to an entity.
      */
@@ -376,6 +389,7 @@ class PermissionService
         if ($entity instanceof Book) {
             $baseActions[] = 'chapter-create';
         }
+
         return $baseActions;
     }
 
@@ -397,6 +411,7 @@ class PermissionService
 
         if ($entity->restricted) {
             $hasAccess = $this->mapHasActiveRestriction($permissionMap, $entity, $role, $restrictionAction);
+
             return $this->createJointPermissionDataArray($entity, $role, $action, $hasAccess, $hasAccess);
         }
 
@@ -433,6 +448,7 @@ class PermissionService
     protected function mapHasActiveRestriction(array $entityMap, Entity $entity, Role $role, string $action): bool
     {
         $key = $entity->getMorphClass() . ':' . $entity->getRawAttribute('id') . ':' . $role->getRawAttribute('id') . ':' . $action;
+
         return $entityMap[$key] ?? false;
     }
 
@@ -443,18 +459,19 @@ class PermissionService
     protected function createJointPermissionDataArray(Entity $entity, Role $role, string $action, bool $permissionAll, bool $permissionOwn): array
     {
         return [
-            'role_id' => $role->getRawAttribute('id'),
-            'entity_id' => $entity->getRawAttribute('id'),
-            'entity_type' => $entity->getMorphClass(),
-            'action' => $action,
-            'has_permission' => $permissionAll,
+            'role_id'            => $role->getRawAttribute('id'),
+            'entity_id'          => $entity->getRawAttribute('id'),
+            'entity_type'        => $entity->getMorphClass(),
+            'action'             => $action,
+            'has_permission'     => $permissionAll,
             'has_permission_own' => $permissionOwn,
-            'owned_by' => $entity->getRawAttribute('owned_by'),
+            'owned_by'           => $entity->getRawAttribute('owned_by'),
         ];
     }
 
     /**
      * Checks if an entity has a restriction set upon it.
+     *
      * @param HasCreatorAndUpdater|HasOwner $ownable
      */
     public function checkOwnableUserAccess(Model $ownable, string $permission): bool
@@ -473,7 +490,8 @@ class PermissionService
             $ownPermission = $user && $user->can($permission . '-own');
             $ownerField = ($ownable instanceof Entity) ? 'owned_by' : 'created_by';
             $isOwner = $user && $user->id === $ownable->$ownerField;
-            return ($allPermission || ($isOwner && $ownPermission));
+
+            return $allPermission || ($isOwner && $ownPermission);
         }
 
         // Handle abnormal create jointPermissions
@@ -483,6 +501,7 @@ class PermissionService
 
         $hasAccess = $this->entityRestrictionQuery($baseQuery, $action)->count() > 0;
         $this->clean();
+
         return $hasAccess;
     }
 
@@ -509,6 +528,7 @@ class PermissionService
 
         $hasPermission = $permissionQuery->count() > 0;
         $this->clean();
+
         return $hasPermission;
     }
 
@@ -529,6 +549,7 @@ class PermissionService
         });
 
         $this->clean();
+
         return $q;
     }
 
@@ -539,6 +560,7 @@ class PermissionService
     public function restrictEntityQuery(Builder $query, string $ability = 'view'): Builder
     {
         $this->clean();
+
         return $query->where(function (Builder $parentQuery) use ($ability) {
             $parentQuery->whereHas('jointPermissions', function (Builder $permissionQuery) use ($ability) {
                 $permissionQuery->whereIn('role_id', $this->getCurrentUserRoles())
@@ -580,6 +602,7 @@ class PermissionService
 
     /**
      * Filter items that have entities set as a polymorphic relation.
+     *
      * @param Builder|\Illuminate\Database\Query\Builder $query
      */
     public function filterRestrictedEntityRelations($query, string $tableName, string $entityIdColumn, string $entityTypeColumn, string $action = 'view')
@@ -600,6 +623,7 @@ class PermissionService
         });
 
         $this->clean();
+
         return $q;
     }
 
@@ -628,12 +652,14 @@ class PermissionService
         });
 
         $this->clean();
+
         return $q;
     }
 
     /**
      * Add the query for checking the given user id has permission
      * within the join_permissions table.
+     *
      * @param QueryBuilder|Builder $query
      */
     protected function addJointHasPermissionCheck($query, int $userIdToCheck)
@@ -645,7 +671,7 @@ class PermissionService
     }
 
     /**
-     * Get the current user
+     * Get the current user.
      */
     private function currentUser(): User
     {

app/Auth/Permissions/PermissionsRepo.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Permissions;
+<?php
+
+namespace BookStack\Auth\Permissions;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Auth\Role;
@@ -9,7 +11,6 @@ use Illuminate\Database\Eloquent\Collection;
 
 class PermissionsRepo
 {
-
     protected $permission;
     protected $role;
     protected $permissionService;
@@ -56,12 +57,14 @@ class PermissionsRepo
     public function saveNewRole(array $roleData): Role
     {
         $role = $this->role->newInstance($roleData);
+        $role->mfa_enforced = ($roleData['mfa_enforced'] ?? 'false') === 'true';
         $role->save();
 
         $permissions = isset($roleData['permissions']) ? array_keys($roleData['permissions']) : [];
         $this->assignRolePermissions($role, $permissions);
         $this->permissionService->buildJointPermissionForRole($role);
         Activity::add(ActivityType::ROLE_CREATE, $role);
+
         return $role;
     }
 
@@ -88,6 +91,7 @@ class PermissionsRepo
         $this->assignRolePermissions($role, $permissions);
 
         $role->fill($roleData);
+        $role->mfa_enforced = ($roleData['mfa_enforced'] ?? 'false') === 'true';
         $role->save();
         $this->permissionService->buildJointPermissionForRole($role);
         Activity::add(ActivityType::ROLE_UPDATE, $role);
@@ -116,6 +120,7 @@ class PermissionsRepo
      * Check it's not an admin role or set as default before deleting.
      * If an migration Role ID is specified the users assign to the current role
      * will be added to the role of the specified id.
+     *
      * @throws PermissionsException
      * @throws Exception
      */
@@ -127,7 +132,7 @@ class PermissionsRepo
         // Prevent deleting admin role or default registration role.
         if ($role->system_name && in_array($role->system_name, $this->systemRoles)) {
             throw new PermissionsException(trans('errors.role_system_cannot_be_deleted'));
-        } else if ($role->id === intval(setting('registration-role'))) {
+        } elseif ($role->id === intval(setting('registration-role'))) {
             throw new PermissionsException(trans('errors.role_registration_default_cannot_delete'));
         }
 

app/Auth/Permissions/RolePermission.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth\Permissions;
+<?php
+
+namespace BookStack\Auth\Permissions;
 
 use BookStack\Auth\Role;
 use BookStack\Model;
@@ -18,7 +20,9 @@ class RolePermission extends Model
 
     /**
      * Get the permission object by name.
+     *
      * @param $name
+     *
      * @return mixed
      */
     public static function getByName($name)

app/Auth/Role.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth;
+<?php
+
+namespace BookStack\Auth;
 
 use BookStack\Auth\Permissions\JointPermission;
 use BookStack\Auth\Permissions\RolePermission;
@@ -9,16 +11,17 @@ use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
 /**
- * Class Role
- * @property int $id
+ * Class Role.
+ *
+ * @property int    $id
  * @property string $display_name
  * @property string $description
  * @property string $external_auth_id
  * @property string $system_name
+ * @property bool   $mfa_enforced
  */
 class Role extends Model implements Loggable
 {
-
     protected $fillable = ['display_name', 'description', 'external_auth_id'];
 
     /**
@@ -56,6 +59,7 @@ class Role extends Model implements Loggable
                 return true;
             }
         }
+
         return false;
     }
 

app/Auth/SocialAccount.php

@@ -1,16 +1,18 @@
-<?php namespace BookStack\Auth;
+<?php
+
+namespace BookStack\Auth;
 
 use BookStack\Interfaces\Loggable;
 use BookStack\Model;
 
 /**
- * Class SocialAccount
+ * Class SocialAccount.
+ *
  * @property string $driver
- * @property User $user
+ * @property User   $user
  */
 class SocialAccount extends Model implements Loggable
 {
-
     protected $fillable = ['user_id', 'driver', 'driver_id', 'timestamps'];
 
     public function user()

app/Auth/User.php

@@ -1,7 +1,10 @@
-<?php namespace BookStack\Auth;
+<?php
+
+namespace BookStack\Auth;
 
 use BookStack\Actions\Favourite;
 use BookStack\Api\ApiToken;
+use BookStack\Auth\Access\Mfa\MfaValue;
 use BookStack\Entities\Tools\SlugGenerator;
 use BookStack\Interfaces\Loggable;
 use BookStack\Interfaces\Sluggable;
@@ -22,32 +25,38 @@ use Illuminate\Notifications\Notifiable;
 use Illuminate\Support\Collection;
 
 /**
- * Class User
- * @property string $id
- * @property string $name
- * @property string $slug
- * @property string $email
- * @property string $password
- * @property Carbon $created_at
- * @property Carbon $updated_at
- * @property bool $email_confirmed
- * @property int $image_id
- * @property string $external_auth_id
- * @property string $system_name
+ * Class User.
+ *
+ * @property string     $id
+ * @property string     $name
+ * @property string     $slug
+ * @property string     $email
+ * @property string     $password
+ * @property Carbon     $created_at
+ * @property Carbon     $updated_at
+ * @property bool       $email_confirmed
+ * @property int        $image_id
+ * @property string     $external_auth_id
+ * @property string     $system_name
  * @property Collection $roles
+ * @property Collection $mfaValues
  */
 class User extends Model implements AuthenticatableContract, CanResetPasswordContract, Loggable, Sluggable
 {
-    use Authenticatable, CanResetPassword, Notifiable;
+    use Authenticatable;
+    use CanResetPassword;
+    use Notifiable;
 
     /**
      * The database table used by the model.
+     *
      * @var string
      */
     protected $table = 'users';
 
     /**
      * The attributes that are mass assignable.
+     *
      * @var array
      */
     protected $fillable = ['name', 'email'];
@@ -56,6 +65,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * The attributes excluded from the model's JSON form.
+     *
      * @var array
      */
     protected $hidden = [
@@ -65,12 +75,14 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * This holds the user's permissions when loaded.
+     *
      * @var ?Collection
      */
     protected $permissions;
 
     /**
      * This holds the default user when loaded.
+     *
      * @var null|User
      */
     protected static $defaultUser = null;
@@ -83,8 +95,9 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
         if (!is_null(static::$defaultUser)) {
             return static::$defaultUser;
         }
-        
+
         static::$defaultUser = static::query()->where('system_name', '=', 'public')->first();
+
         return static::$defaultUser;
     }
 
@@ -98,13 +111,15 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * The roles that belong to the user.
+     *
      * @return BelongsToMany
      */
     public function roles()
     {
         if ($this->id === 0) {
-            return ;
+            return;
         }
+
         return $this->belongsToMany(Role::class);
     }
 
@@ -194,7 +209,9 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     /**
      * Check if the user has a social account,
      * If a driver is passed it checks for that single account type.
+     *
      * @param bool|string $socialDriver
+     *
      * @return bool
      */
     public function hasSocialAccount($socialDriver = false)
@@ -207,7 +224,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     }
 
     /**
-     * Returns a URL to the user's avatar
+     * Returns a URL to the user's avatar.
      */
     public function getAvatar(int $size = 50): string
     {
@@ -222,6 +239,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
         } catch (Exception $err) {
             $avatar = $default;
         }
+
         return $avatar;
     }
 
@@ -249,6 +267,14 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
         return $this->hasMany(Favourite::class);
     }
 
+    /**
+     * Get the MFA values belonging to this use.
+     */
+    public function mfaValues(): HasMany
+    {
+        return $this->hasMany(MfaValue::class);
+    }
+
     /**
      * Get the last activity time for this user.
      */
@@ -268,6 +294,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     public function getEditUrl(string $path = ''): string
     {
         $uri = '/settings/users/' . $this->id . '/' . trim($path, '/');
+
         return url(rtrim($uri, '/'));
     }
 
@@ -298,7 +325,9 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
 
     /**
      * Send the password reset notification.
-     * @param  string  $token
+     *
+     * @param string $token
+     *
      * @return void
      */
     public function sendPasswordResetNotification($token)
@@ -320,6 +349,7 @@ class User extends Model implements AuthenticatableContract, CanResetPasswordCon
     public function refreshSlug(): string
     {
         $this->slug = app(SlugGenerator::class)->generate($this);
+
         return $this->slug;
     }
 }

app/Auth/UserRepo.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Auth;
+<?php
+
+namespace BookStack\Auth;
 
 use Activity;
 use BookStack\Entities\EntityProvider;
@@ -69,6 +71,7 @@ class UserRepo
         $query = User::query()->select(['*'])
             ->withLastActivityAt()
             ->with(['roles', 'avatar'])
+            ->withCount('mfaValues')
             ->orderBy($sort, $sortData['order']);
 
         if ($sortData['search']) {
@@ -82,7 +85,7 @@ class UserRepo
         return $query->paginate($count);
     }
 
-     /**
+    /**
      * Creates a new user and attaches a role to them.
      */
     public function registerNew(array $data, bool $emailConfirmed = false): User
@@ -96,6 +99,7 @@ class UserRepo
 
     /**
      * Assign a user to a system-level role.
+     *
      * @throws NotFoundException
      */
     public function attachSystemRole(User $user, string $systemRoleName)
@@ -126,6 +130,7 @@ class UserRepo
 
     /**
      * Set the assigned user roles via an array of role IDs.
+     *
      * @throws UserUpdateException
      */
     public function setUserRoles(User $user, array $roles)
@@ -141,7 +146,7 @@ class UserRepo
      * Check if the given user is the last admin and their new roles no longer
      * contains the admin role.
      */
-    protected function demotingLastAdmin(User $user, array $newRoles) : bool
+    protected function demotingLastAdmin(User $user, array $newRoles): bool
     {
         if ($this->isOnlyAdmin($user)) {
             $adminRole = Role::getSystemRole('admin');
@@ -159,10 +164,10 @@ class UserRepo
     public function create(array $data, bool $emailConfirmed = false): User
     {
         $details = [
-            'name'     => $data['name'],
-            'email'    => $data['email'],
-            'password' => bcrypt($data['password']),
-            'email_confirmed' => $emailConfirmed,
+            'name'             => $data['name'],
+            'email'            => $data['email'],
+            'password'         => bcrypt($data['password']),
+            'email_confirmed'  => $emailConfirmed,
             'external_auth_id' => $data['external_auth_id'] ?? '',
         ];
 
@@ -176,6 +181,7 @@ class UserRepo
 
     /**
      * Remove the given user from storage, Delete all related content.
+     *
      * @throws Exception
      */
     public function destroy(User $user, ?int $newOwnerId = null)
@@ -183,8 +189,9 @@ class UserRepo
         $user->socialAccounts()->delete();
         $user->apiTokens()->delete();
         $user->favourites()->delete();
+        $user->mfaValues()->delete();
         $user->delete();
-        
+
         // Delete user profile images
         $this->userAvatar->destroyAllForUser($user);
 
@@ -201,7 +208,7 @@ class UserRepo
      */
     protected function migrateOwnership(User $fromUser, User $toUser)
     {
-        $entities = (new EntityProvider)->all();
+        $entities = (new EntityProvider())->all();
         foreach ($entities as $instance) {
             $instance->newQuery()->where('owned_by', '=', $fromUser->id)
                 ->update(['owned_by' => $toUser->id]);
@@ -242,11 +249,12 @@ class UserRepo
     public function getAssetCounts(User $user): array
     {
         $createdBy = ['created_by' => $user->id];
+
         return [
-            'pages'    =>  Page::visible()->where($createdBy)->count(),
-            'chapters'    =>  Chapter::visible()->where($createdBy)->count(),
-            'books'    =>  Book::visible()->where($createdBy)->count(),
-            'shelves'    =>  Bookshelf::visible()->where($createdBy)->count(),
+            'pages'       => Page::visible()->where($createdBy)->count(),
+            'chapters'    => Chapter::visible()->where($createdBy)->count(),
+            'books'       => Book::visible()->where($createdBy)->count(),
+            'shelves'     => Bookshelf::visible()->where($createdBy)->count(),
         ];
     }
 

app/Config/api.php

@@ -18,6 +18,6 @@ return [
     'max_item_count' => env('API_MAX_ITEM_COUNT', 500),
 
     // The number of API requests that can be made per minute by a single user.
-    'requests_per_minute' => env('API_REQUESTS_PER_MIN', 180)
+    'requests_per_minute' => env('API_REQUESTS_PER_MIN', 180),
 
 ];

app/Config/app.php

@@ -36,6 +36,11 @@ return [
     // Even when overridden the WYSIWYG editor may still escape script content.
     'allow_content_scripts' => env('ALLOW_CONTENT_SCRIPTS', false),
 
+    // Allow server-side fetches to be performed to potentially unknown
+    // and user-provided locations. Primarily used in exports when loading
+    // in externally referenced assets.
+    'allow_untrusted_server_fetching' => env('ALLOW_UNTRUSTED_SERVER_FETCHING', false),
+
     // Override the default behaviour for allowing crawlers to crawl the instance.
     // May be ignored if view has be overridden or modified.
     // Defaults to null since, if not set, 'app-public' status used instead.
@@ -56,7 +61,7 @@ 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', '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', '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',
@@ -140,52 +145,52 @@ return [
     'aliases' => [
 
         // Laravel
-        'App'       => Illuminate\Support\Facades\App::class,
-        'Arr'       => Illuminate\Support\Arr::class,
-        'Artisan'   => Illuminate\Support\Facades\Artisan::class,
-        'Auth'      => Illuminate\Support\Facades\Auth::class,
-        'Blade'     => Illuminate\Support\Facades\Blade::class,
-        'Bus'       => Illuminate\Support\Facades\Bus::class,
-        'Cache'     => Illuminate\Support\Facades\Cache::class,
-        'Config'    => Illuminate\Support\Facades\Config::class,
-        'Cookie'    => Illuminate\Support\Facades\Cookie::class,
-        'Crypt'     => Illuminate\Support\Facades\Crypt::class,
-        'DB'        => Illuminate\Support\Facades\DB::class,
-        'Eloquent'  => Illuminate\Database\Eloquent\Model::class,
-        'Event'     => Illuminate\Support\Facades\Event::class,
-        'File'      => Illuminate\Support\Facades\File::class,
-        'Hash'      => Illuminate\Support\Facades\Hash::class,
-        'Input'     => Illuminate\Support\Facades\Input::class,
-        'Inspiring' => Illuminate\Foundation\Inspiring::class,
-        'Lang'      => Illuminate\Support\Facades\Lang::class,
-        'Log'       => Illuminate\Support\Facades\Log::class,
-        'Mail'      => Illuminate\Support\Facades\Mail::class,
+        'App'          => Illuminate\Support\Facades\App::class,
+        'Arr'          => Illuminate\Support\Arr::class,
+        'Artisan'      => Illuminate\Support\Facades\Artisan::class,
+        'Auth'         => Illuminate\Support\Facades\Auth::class,
+        'Blade'        => Illuminate\Support\Facades\Blade::class,
+        'Bus'          => Illuminate\Support\Facades\Bus::class,
+        'Cache'        => Illuminate\Support\Facades\Cache::class,
+        'Config'       => Illuminate\Support\Facades\Config::class,
+        'Cookie'       => Illuminate\Support\Facades\Cookie::class,
+        'Crypt'        => Illuminate\Support\Facades\Crypt::class,
+        'DB'           => Illuminate\Support\Facades\DB::class,
+        'Eloquent'     => Illuminate\Database\Eloquent\Model::class,
+        'Event'        => Illuminate\Support\Facades\Event::class,
+        'File'         => Illuminate\Support\Facades\File::class,
+        'Hash'         => Illuminate\Support\Facades\Hash::class,
+        'Input'        => Illuminate\Support\Facades\Input::class,
+        'Inspiring'    => Illuminate\Foundation\Inspiring::class,
+        'Lang'         => Illuminate\Support\Facades\Lang::class,
+        'Log'          => Illuminate\Support\Facades\Log::class,
+        'Mail'         => Illuminate\Support\Facades\Mail::class,
         'Notification' => Illuminate\Support\Facades\Notification::class,
-        'Password'  => Illuminate\Support\Facades\Password::class,
-        'Queue'     => Illuminate\Support\Facades\Queue::class,
-        'Redirect'  => Illuminate\Support\Facades\Redirect::class,
-        'Redis'     => Illuminate\Support\Facades\Redis::class,
-        'Request'   => Illuminate\Support\Facades\Request::class,
-        'Response'  => Illuminate\Support\Facades\Response::class,
-        'Route'     => Illuminate\Support\Facades\Route::class,
-        'Schema'    => Illuminate\Support\Facades\Schema::class,
-        'Session'   => Illuminate\Support\Facades\Session::class,
-        'Storage'   => Illuminate\Support\Facades\Storage::class,
-        'Str'       => Illuminate\Support\Str::class,
-        'URL'       => Illuminate\Support\Facades\URL::class,
-        'Validator' => Illuminate\Support\Facades\Validator::class,
-        'View'      => Illuminate\Support\Facades\View::class,
-        'Socialite' => Laravel\Socialite\Facades\Socialite::class,
+        'Password'     => Illuminate\Support\Facades\Password::class,
+        'Queue'        => Illuminate\Support\Facades\Queue::class,
+        'Redirect'     => Illuminate\Support\Facades\Redirect::class,
+        'Redis'        => Illuminate\Support\Facades\Redis::class,
+        'Request'      => Illuminate\Support\Facades\Request::class,
+        'Response'     => Illuminate\Support\Facades\Response::class,
+        'Route'        => Illuminate\Support\Facades\Route::class,
+        'Schema'       => Illuminate\Support\Facades\Schema::class,
+        'Session'      => Illuminate\Support\Facades\Session::class,
+        'Storage'      => Illuminate\Support\Facades\Storage::class,
+        'Str'          => Illuminate\Support\Str::class,
+        'URL'          => Illuminate\Support\Facades\URL::class,
+        'Validator'    => Illuminate\Support\Facades\Validator::class,
+        'View'         => Illuminate\Support\Facades\View::class,
+        'Socialite'    => Laravel\Socialite\Facades\Socialite::class,
 
         // Third Party
         'ImageTool' => Intervention\Image\Facades\Image::class,
-        'DomPDF' => Barryvdh\DomPDF\Facade::class,
+        'DomPDF'    => Barryvdh\DomPDF\Facade::class,
         'SnappyPDF' => Barryvdh\Snappy\Facades\SnappyPdf::class,
 
         // Custom BookStack
-        'Activity' => BookStack\Facades\Activity::class,
+        'Activity'    => BookStack\Facades\Activity::class,
         'Permissions' => BookStack\Facades\Permissions::class,
-        'Theme'    => BookStack\Facades\Theme::class,
+        'Theme'       => BookStack\Facades\Theme::class,
     ],
 
     // Proxy configuration

app/Config/auth.php

@@ -18,7 +18,7 @@ return [
     // This option controls the default authentication "guard" and password
     // reset options for your application.
     'defaults' => [
-        'guard' => env('AUTH_METHOD', 'standard'),
+        'guard'     => env('AUTH_METHOD', 'standard'),
         'passwords' => 'users',
     ],
 
@@ -29,15 +29,15 @@ return [
     // Supported drivers: "session", "api-token", "ldap-session"
     'guards' => [
         'standard' => [
-            'driver' => 'session',
+            'driver'   => 'session',
             'provider' => 'users',
         ],
         'ldap' => [
-            'driver' => 'ldap-session',
+            'driver'   => 'ldap-session',
             'provider' => 'external',
         ],
         'saml2' => [
-            'driver' => 'saml2-session',
+            'driver'   => 'saml2-session',
             'provider' => 'external',
         ],
         'api' => [
@@ -52,11 +52,11 @@ return [
     'providers' => [
         'users' => [
             'driver' => 'eloquent',
-            'model' => \BookStack\Auth\User::class,
+            'model'  => \BookStack\Auth\User::class,
         ],
         'external' => [
             'driver' => 'external-users',
-            'model' => \BookStack\Auth\User::class,
+            'model'  => \BookStack\Auth\User::class,
         ],
     ],
 
@@ -67,9 +67,9 @@ return [
     'passwords' => [
         'users' => [
             'provider' => 'users',
-            'email' => 'emails.password',
-            'table' => 'password_resets',
-            'expire' => 60,
+            'email'    => 'emails.password',
+            'table'    => 'password_resets',
+            'expire'   => 60,
         ],
     ],
 

app/Config/broadcasting.php

@@ -23,18 +23,18 @@ return [
     'connections' => [
 
         'pusher' => [
-            'driver' => 'pusher',
-            'key' => env('PUSHER_APP_KEY'),
-            'secret' => env('PUSHER_APP_SECRET'),
-            'app_id' => env('PUSHER_APP_ID'),
+            'driver'  => 'pusher',
+            'key'     => env('PUSHER_APP_KEY'),
+            'secret'  => env('PUSHER_APP_SECRET'),
+            'app_id'  => env('PUSHER_APP_ID'),
             'options' => [
                 'cluster' => env('PUSHER_APP_CLUSTER'),
-                'useTLS' => true,
+                'useTLS'  => true,
             ],
         ],
 
         'redis' => [
-            'driver' => 'redis',
+            'driver'     => 'redis',
             'connection' => 'default',
         ],
 
@@ -46,7 +46,6 @@ return [
             'driver' => 'null',
         ],
 
-
     ],
 
 ];

app/Config/cache.php

@@ -42,8 +42,8 @@ return [
         ],
 
         'database' => [
-            'driver' => 'database',
-            'table'  => 'cache',
+            'driver'     => 'database',
+            'table'      => 'cache',
             'connection' => null,
         ],
 
@@ -58,7 +58,7 @@ return [
         ],
 
         'redis' => [
-            'driver' => 'redis',
+            'driver'     => 'redis',
             'connection' => 'default',
         ],
 

app/Config/database.php

@@ -59,38 +59,38 @@ return [
     'connections' => [
 
         'mysql' => [
-            'driver'    => 'mysql',
-            'url' => env('DATABASE_URL'),
-            'host'      => $mysql_host,
-            'database'  => env('DB_DATABASE', 'forge'),
-            'username'  => env('DB_USERNAME', 'forge'),
-            'password'  => env('DB_PASSWORD', ''),
-            'unix_socket' => env('DB_SOCKET', ''),
-            'port'      => $mysql_port,
-            'charset'   => 'utf8mb4',
-            'collation' => 'utf8mb4_unicode_ci',
-            'prefix'    => '',
+            'driver'         => 'mysql',
+            'url'            => env('DATABASE_URL'),
+            'host'           => $mysql_host,
+            'database'       => env('DB_DATABASE', 'forge'),
+            'username'       => env('DB_USERNAME', 'forge'),
+            'password'       => env('DB_PASSWORD', ''),
+            'unix_socket'    => env('DB_SOCKET', ''),
+            'port'           => $mysql_port,
+            'charset'        => 'utf8mb4',
+            'collation'      => 'utf8mb4_unicode_ci',
+            'prefix'         => '',
             'prefix_indexes' => true,
-            'strict'    => false,
-            'engine' => null,
-            'options' => extension_loaded('pdo_mysql') ? array_filter([
+            'strict'         => false,
+            'engine'         => null,
+            'options'        => extension_loaded('pdo_mysql') ? array_filter([
                 PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
             ]) : [],
         ],
 
         'mysql_testing' => [
-            'driver'    => 'mysql',
-            'url' => env('TEST_DATABASE_URL'),
-            'host'      => '127.0.0.1',
-            'database'  => 'bookstack-test',
-            'username'  => env('MYSQL_USER', 'bookstack-test'),
-            'password'  => env('MYSQL_PASSWORD', 'bookstack-test'),
-            'port'      => $mysql_port,
-            'charset'   => 'utf8mb4',
-            'collation' => 'utf8mb4_unicode_ci',
-            'prefix'    => '',
+            'driver'         => 'mysql',
+            'url'            => env('TEST_DATABASE_URL'),
+            'host'           => '127.0.0.1',
+            'database'       => 'bookstack-test',
+            'username'       => env('MYSQL_USER', 'bookstack-test'),
+            'password'       => env('MYSQL_PASSWORD', 'bookstack-test'),
+            'port'           => $mysql_port,
+            'charset'        => 'utf8mb4',
+            'collation'      => 'utf8mb4_unicode_ci',
+            'prefix'         => '',
             'prefix_indexes' => true,
-            'strict'    => false,
+            'strict'         => false,
         ],
 
     ],

app/Config/debugbar.php

@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Debugbar Configuration Options
+ * Debugbar Configuration Options.
  *
  * Changes to these config files are not supported by BookStack and may break upon updates.
  * Configuration should be altered via the `.env` file or environment variables.
@@ -10,53 +10,52 @@
 
 return [
 
-     // Debugbar is enabled by default, when debug is set to true in app.php.
-     // You can override the value by setting enable to true or false instead of null.
-     //
-     // You can provide an array of URI's that must be ignored (eg. 'api/*')
+    // Debugbar is enabled by default, when debug is set to true in app.php.
+    // You can override the value by setting enable to true or false instead of null.
+    //
+    // You can provide an array of URI's that must be ignored (eg. 'api/*')
     'enabled' => env('DEBUGBAR_ENABLED', false),
-    'except' => [
-        'telescope*'
+    'except'  => [
+        'telescope*',
     ],
 
-
-     // DebugBar stores data for session/ajax requests.
-     // You can disable this, so the debugbar stores data in headers/session,
-     // but this can cause problems with large data collectors.
-     // By default, file storage (in the storage folder) is used. Redis and PDO
-     // can also be used. For PDO, run the package migrations first.
+    // DebugBar stores data for session/ajax requests.
+    // You can disable this, so the debugbar stores data in headers/session,
+    // but this can cause problems with large data collectors.
+    // By default, file storage (in the storage folder) is used. Redis and PDO
+    // can also be used. For PDO, run the package migrations first.
     'storage' => [
         'enabled'    => true,
         'driver'     => 'file', // redis, file, pdo, custom
         'path'       => storage_path('debugbar'), // For file driver
         'connection' => null,   // Leave null for default connection (Redis/PDO)
-        'provider'   => '' // Instance of StorageInterface for custom driver
+        'provider'   => '', // Instance of StorageInterface for custom driver
     ],
 
-     // Vendor files are included by default, but can be set to false.
-     // This can also be set to 'js' or 'css', to only include javascript or css vendor files.
-     // Vendor files are for css: font-awesome (including fonts) and highlight.js (css files)
-     // and for js: jquery and and highlight.js
-     // So if you want syntax highlighting, set it to true.
-     // jQuery is set to not conflict with existing jQuery scripts.
+    // Vendor files are included by default, but can be set to false.
+    // This can also be set to 'js' or 'css', to only include javascript or css vendor files.
+    // Vendor files are for css: font-awesome (including fonts) and highlight.js (css files)
+    // and for js: jquery and and highlight.js
+    // So if you want syntax highlighting, set it to true.
+    // jQuery is set to not conflict with existing jQuery scripts.
     'include_vendors' => true,
 
-     // The Debugbar can capture Ajax requests and display them. If you don't want this (ie. because of errors),
-     // you can use this option to disable sending the data through the headers.
-     // Optionally, you can also send ServerTiming headers on ajax requests for the Chrome DevTools.
+    // The Debugbar can capture Ajax requests and display them. If you don't want this (ie. because of errors),
+    // you can use this option to disable sending the data through the headers.
+    // Optionally, you can also send ServerTiming headers on ajax requests for the Chrome DevTools.
 
-    'capture_ajax' => true,
+    'capture_ajax'    => true,
     'add_ajax_timing' => false,
 
-     // When enabled, the Debugbar shows deprecated warnings for Symfony components
-     // in the Messages tab.
+    // When enabled, the Debugbar shows deprecated warnings for Symfony components
+    // in the Messages tab.
     'error_handler' => false,
 
-     // The Debugbar can emulate the Clockwork headers, so you can use the Chrome
-     // Extension, without the server-side code. It uses Debugbar collectors instead.
+    // The Debugbar can emulate the Clockwork headers, so you can use the Chrome
+    // Extension, without the server-side code. It uses Debugbar collectors instead.
     'clockwork' => false,
 
-     // Enable/disable DataCollectors
+    // Enable/disable DataCollectors
     'collectors' => [
         'phpinfo'         => true,  // Php version
         'messages'        => true,  // Messages
@@ -82,7 +81,7 @@ return [
         'models'          => true, // Display models
     ],
 
-     // Configure some DataCollectors
+    // Configure some DataCollectors
     'options' => [
         'auth' => [
             'show_name' => true,   // Also show the users name/email in the debugbar
@@ -91,43 +90,43 @@ return [
             'with_params'       => true,   // Render SQL with the parameters substituted
             'backtrace'         => true,   // Use a backtrace to find the origin of the query in your files.
             'timeline'          => false,  // Add the queries to the timeline
-            'explain' => [                 // Show EXPLAIN output on queries
+            'explain'           => [                 // Show EXPLAIN output on queries
                 'enabled' => false,
-                'types' => ['SELECT'],     // ['SELECT', 'INSERT', 'UPDATE', 'DELETE']; for MySQL 5.6.3+
+                'types'   => ['SELECT'],     // ['SELECT', 'INSERT', 'UPDATE', 'DELETE']; for MySQL 5.6.3+
             ],
             'hints'             => true,    // Show hints for common mistakes
         ],
         'mail' => [
-            'full_log' => false
+            'full_log' => false,
         ],
         'views' => [
             'data' => false,    //Note: Can slow down the application, because the data can be quite large..
         ],
         'route' => [
-            'label' => true  // show complete route on bar
+            'label' => true,  // show complete route on bar
         ],
         'logs' => [
-            'file' => null
+            'file' => null,
         ],
         'cache' => [
-            'values' => true // collect cache values
+            'values' => true, // collect cache values
         ],
     ],
 
-     // Inject Debugbar into the response
-     // Usually, the debugbar is added just before </body>, by listening to the
-     // Response after the App is done. If you disable this, you have to add them
-     // in your template yourself. See http://phpdebugbar.com/docs/rendering.html
+    // Inject Debugbar into the response
+    // Usually, the debugbar is added just before </body>, by listening to the
+    // Response after the App is done. If you disable this, you have to add them
+    // in your template yourself. See http://phpdebugbar.com/docs/rendering.html
     'inject' => true,
 
-     // DebugBar route prefix
-     // Sometimes you want to set route prefix to be used by DebugBar to load
-     // its resources from. Usually the need comes from misconfigured web server or
-     // from trying to overcome bugs like this: http://trac.nginx.org/nginx/ticket/97
+    // DebugBar route prefix
+    // Sometimes you want to set route prefix to be used by DebugBar to load
+    // its resources from. Usually the need comes from misconfigured web server or
+    // from trying to overcome bugs like this: http://trac.nginx.org/nginx/ticket/97
     'route_prefix' => '_debugbar',
 
-     // DebugBar route domain
-     // By default DebugBar route served from the same domain that request served.
-     // To override default domain, specify it as a non-empty value.
+    // DebugBar route domain
+    // By default DebugBar route served from the same domain that request served.
+    // To override default domain, specify it as a non-empty value.
     'route_domain' => env('APP_URL', '') === 'http://bookstack.dev' ? '' : env('APP_URL', ''),
 ];

app/Config/dompdf.php

@@ -10,12 +10,11 @@
 
 return [
 
-
     'show_warnings' => false,   // Throw an Exception on warnings from dompdf
-    'orientation' => 'portrait',
-    'defines' => [
+    'orientation'   => 'portrait',
+    'defines'       => [
         /**
-         * The location of the DOMPDF font directory
+         * The location of the DOMPDF font directory.
          *
          * The location of the directory where DOMPDF will store fonts and font metrics
          * Note: This directory must exist and be writable by the webserver process.
@@ -38,17 +37,17 @@ return [
          * Times-Roman, Times-Bold, Times-BoldItalic, Times-Italic,
          * Symbol, ZapfDingbats.
          */
-        "DOMPDF_FONT_DIR" => storage_path('fonts/'),  // advised by dompdf (https://github.com/dompdf/dompdf/pull/782)
+        'font_dir' => storage_path('fonts/'),  // advised by dompdf (https://github.com/dompdf/dompdf/pull/782)
 
         /**
-         * The location of the DOMPDF font cache directory
+         * The location of the DOMPDF font cache directory.
          *
          * This directory contains the cached font metrics for the fonts used by DOMPDF.
          * This directory can be the same as DOMPDF_FONT_DIR
          *
          * Note: This directory must exist and be writable by the webserver process.
          */
-        "DOMPDF_FONT_CACHE" => storage_path('fonts/'),
+        'font_cache' => storage_path('fonts/'),
 
         /**
          * The location of a temporary directory.
@@ -57,10 +56,10 @@ return [
          * The temporary directory is required to download remote images and when
          * using the PFDLib back end.
          */
-        "DOMPDF_TEMP_DIR" => sys_get_temp_dir(),
+        'temp_dir' => sys_get_temp_dir(),
 
         /**
-         * ==== IMPORTANT ====
+         * ==== IMPORTANT ====.
          *
          * dompdf's "chroot": Prevents dompdf from accessing system files or other
          * files on the webserver.  All local files opened by dompdf must be in a
@@ -71,7 +70,7 @@ return [
          * direct class use like:
          * $dompdf = new DOMPDF();  $dompdf->load_html($htmldata); $dompdf->render(); $pdfdata = $dompdf->output();
          */
-        "DOMPDF_CHROOT" => realpath(base_path()),
+        'chroot' => realpath(base_path()),
 
         /**
          * Whether to use Unicode fonts or not.
@@ -82,20 +81,19 @@ return [
          * When enabled, dompdf can support all Unicode glyphs. Any glyphs used in a
          * document must be present in your fonts, however.
          */
-        "DOMPDF_UNICODE_ENABLED" => true,
+        'unicode_enabled' => true,
 
         /**
          * Whether to enable font subsetting or not.
          */
-        "DOMPDF_ENABLE_FONTSUBSETTING" => false,
+        'enable_fontsubsetting' => false,
 
         /**
-         * The PDF rendering backend to use
+         * The PDF rendering backend to use.
          *
          * Valid settings are 'PDFLib', 'CPDF' (the bundled R&OS PDF class), 'GD' and
          * 'auto'. 'auto' will look for PDFLib and use it if found, or if not it will
-         * fall back on CPDF. 'GD' renders PDFs to graphic files. {@link
-         * Canvas_Factory} ultimately determines which rendering class to instantiate
+         * fall back on CPDF. 'GD' renders PDFs to graphic files. {@link * Canvas_Factory} ultimately determines which rendering class to instantiate
          * based on this setting.
          *
          * Both PDFLib & CPDF rendering backends provide sufficient rendering
@@ -117,10 +115,10 @@ return [
          * @link http://www.ros.co.nz/pdf
          * @link http://www.php.net/image
          */
-        "DOMPDF_PDF_BACKEND" => "CPDF",
+        'pdf_backend' => 'CPDF',
 
         /**
-         * PDFlib license key
+         * PDFlib license key.
          *
          * If you are using a licensed, commercial version of PDFlib, specify
          * your license key here.  If you are using PDFlib-Lite or are evaluating
@@ -143,7 +141,7 @@ return [
          * the desired content might be different (e.g. screen or projection view of html file).
          * Therefore allow specification of content here.
          */
-        "DOMPDF_DEFAULT_MEDIA_TYPE" => "print",
+        'default_media_type' => 'print',
 
         /**
          * The default paper size.
@@ -152,18 +150,19 @@ return [
          *
          * @see CPDF_Adapter::PAPER_SIZES for valid sizes ('letter', 'legal', 'A4', etc.)
          */
-        "DOMPDF_DEFAULT_PAPER_SIZE" => "a4",
+        'default_paper_size' => 'a4',
 
         /**
-         * The default font family
+         * The default font family.
          *
          * Used if no suitable fonts can be found. This must exist in the font folder.
+         *
          * @var string
          */
-        "DOMPDF_DEFAULT_FONT" => "dejavu sans",
+        'default_font' => 'dejavu sans',
 
         /**
-         * Image DPI setting
+         * Image DPI setting.
          *
          * This setting determines the default DPI setting for images and fonts.  The
          * DPI may be overridden for inline images by explictly setting the
@@ -195,10 +194,10 @@ return [
          *
          * @var int
          */
-        "DOMPDF_DPI" => 96,
+        'dpi' => 96,
 
         /**
-         * Enable inline PHP
+         * Enable inline PHP.
          *
          * If this setting is set to true then DOMPDF will automatically evaluate
          * inline PHP contained within <script type="text/php"> ... </script> tags.
@@ -209,20 +208,20 @@ return [
          *
          * @var bool
          */
-        "DOMPDF_ENABLE_PHP" => false,
+        'enable_php' => false,
 
         /**
-         * Enable inline Javascript
+         * Enable inline Javascript.
          *
          * If this setting is set to true then DOMPDF will automatically insert
          * JavaScript code contained within <script type="text/javascript"> ... </script> tags.
          *
          * @var bool
          */
-        "DOMPDF_ENABLE_JAVASCRIPT" => false,
+        'enable_javascript' => false,
 
         /**
-         * Enable remote file access
+         * Enable remote file access.
          *
          * If this setting is set to true, DOMPDF will access remote sites for
          * images and CSS files as required.
@@ -238,29 +237,27 @@ return [
          *
          * @var bool
          */
-        "DOMPDF_ENABLE_REMOTE" => true,
+        'enable_remote' => env('ALLOW_UNTRUSTED_SERVER_FETCHING', false),
 
         /**
-         * A ratio applied to the fonts height to be more like browsers' line height
+         * A ratio applied to the fonts height to be more like browsers' line height.
          */
-        "DOMPDF_FONT_HEIGHT_RATIO" => 1.1,
+        'font_height_ratio' => 1.1,
 
         /**
-         * Enable CSS float
+         * Enable CSS float.
          *
          * Allows people to disabled CSS float support
+         *
          * @var bool
          */
-        "DOMPDF_ENABLE_CSS_FLOAT" => true,
-
+        'enable_css_float' => true,
 
         /**
-         * Use the more-than-experimental HTML5 Lib parser
+         * Use the more-than-experimental HTML5 Lib parser.
          */
-        "DOMPDF_ENABLE_HTML5PARSER" => true,
-
+        'enable_html5parser' => true,
 
     ],
 
-
 ];

app/Config/filesystems.php

@@ -34,7 +34,7 @@ return [
 
         'local' => [
             'driver' => 'local',
-            'root' => public_path(),
+            'root'   => public_path(),
         ],
 
         'local_secure' => [
@@ -43,12 +43,12 @@ return [
         ],
 
         's3' => [
-            'driver' => 's3',
-            'key'    => env('STORAGE_S3_KEY', 'your-key'),
-            'secret' => env('STORAGE_S3_SECRET', 'your-secret'),
-            'region' => env('STORAGE_S3_REGION', 'your-region'),
-            'bucket' => env('STORAGE_S3_BUCKET', 'your-bucket'),
-            'endpoint' => env('STORAGE_S3_ENDPOINT', null),
+            'driver'                  => 's3',
+            'key'                     => env('STORAGE_S3_KEY', 'your-key'),
+            'secret'                  => env('STORAGE_S3_SECRET', 'your-secret'),
+            'region'                  => env('STORAGE_S3_REGION', 'your-region'),
+            'bucket'                  => env('STORAGE_S3_BUCKET', 'your-bucket'),
+            'endpoint'                => env('STORAGE_S3_ENDPOINT', null),
             'use_path_style_endpoint' => env('STORAGE_S3_ENDPOINT', null) !== null,
         ],
 

app/Config/hashing.php

@@ -29,9 +29,9 @@ return [
     // passwords are hashed using the Argon algorithm. These will allow you
     // to control the amount of time it takes to hash the given password.
     'argon' => [
-        'memory' => 1024,
+        'memory'  => 1024,
         'threads' => 2,
-        'time' => 2,
+        'time'    => 2,
     ],
 
 ];

app/Config/logging.php

@@ -30,66 +30,66 @@ return [
     //                    "custom", "stack"
     'channels' => [
         'stack' => [
-            'driver' => 'stack',
-            'channels' => ['daily'],
+            'driver'            => 'stack',
+            'channels'          => ['daily'],
             'ignore_exceptions' => false,
         ],
 
         'single' => [
             'driver' => 'single',
-            'path' => storage_path('logs/laravel.log'),
-            'level' => 'debug',
-            'days' => 14,
+            'path'   => storage_path('logs/laravel.log'),
+            'level'  => 'debug',
+            'days'   => 14,
         ],
 
         'daily' => [
             'driver' => 'daily',
-            'path' => storage_path('logs/laravel.log'),
-            'level' => 'debug',
-            'days' => 7,
+            'path'   => storage_path('logs/laravel.log'),
+            'level'  => 'debug',
+            'days'   => 7,
         ],
 
         'slack' => [
-            'driver' => 'slack',
-            'url' => env('LOG_SLACK_WEBHOOK_URL'),
+            'driver'   => 'slack',
+            'url'      => env('LOG_SLACK_WEBHOOK_URL'),
             'username' => 'Laravel Log',
-            'emoji' => ':boom:',
-            'level' => 'critical',
+            'emoji'    => ':boom:',
+            'level'    => 'critical',
         ],
 
         'stderr' => [
-            'driver' => 'monolog',
+            'driver'  => 'monolog',
             'handler' => StreamHandler::class,
-            'with' => [
+            'with'    => [
                 'stream' => 'php://stderr',
             ],
         ],
 
         'syslog' => [
             'driver' => 'syslog',
-            'level' => 'debug',
+            'level'  => 'debug',
         ],
 
         'errorlog' => [
             'driver' => 'errorlog',
-            'level' => 'debug',
+            'level'  => 'debug',
         ],
 
         // Custom errorlog implementation that logs out a plain,
         // non-formatted message intended for the webserver log.
         'errorlog_plain_webserver' => [
-            'driver' => 'monolog',
-            'level' => 'debug',
-            'handler' => ErrorLogHandler::class,
-            'handler_with' => [4],
-            'formatter' => LineFormatter::class,
+            'driver'         => 'monolog',
+            'level'          => 'debug',
+            'handler'        => ErrorLogHandler::class,
+            'handler_with'   => [4],
+            'formatter'      => LineFormatter::class,
             'formatter_with' => [
-                'format' => "%message%",
+                'format' => '%message%',
             ],
         ],
 
         'null' => [
-            'driver' => 'monolog',
+            'driver'  => 'monolog',
             'handler' => NullHandler::class,
         ],
 
@@ -101,7 +101,6 @@ return [
         ],
     ],
 
-
     // Failed Login Message
     // Allows a configurable message to be logged when a login request fails.
     'failed_login' => [

app/Config/mail.php

@@ -23,7 +23,7 @@ return [
     // Global "From" address & name
     'from' => [
         'address' => env('MAIL_FROM', 'mail@bookstackapp.com'),
-        'name' => env('MAIL_FROM_NAME', 'BookStack')
+        'name'    => env('MAIL_FROM_NAME', 'BookStack'),
     ],
 
     // Email encryption protocol

app/Config/queue.php

@@ -17,24 +17,23 @@ return [
     // Queue connection configuration
     'connections' => [
 
-
         'sync' => [
             'driver' => 'sync',
         ],
 
         'database' => [
-            'driver' => 'database',
-            'table' => 'jobs',
-            'queue' => 'default',
+            'driver'      => 'database',
+            'table'       => 'jobs',
+            'queue'       => 'default',
             'retry_after' => 90,
         ],
 
         'redis' => [
-            'driver' => 'redis',
-            'connection' => 'default',
-            'queue' => env('REDIS_QUEUE', 'default'),
+            'driver'      => 'redis',
+            'connection'  => 'default',
+            'queue'       => env('REDIS_QUEUE', 'default'),
             'retry_after' => 90,
-            'block_for' => null,
+            'block_for'   => null,
         ],
 
     ],

app/Config/saml2.php

@@ -31,7 +31,6 @@ return [
     // Overrides, in JSON format, to the configuration passed to underlying onelogin library.
     'onelogin_overrides' => env('SAML2_ONELOGIN_OVERRIDES', null),
 
-
     'onelogin' => [
         // If 'strict' is True, then the PHP Toolkit will reject unsigned
         // or unencrypted messages if it expects them signed or encrypted
@@ -81,7 +80,7 @@ return [
             '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' => '',
+            'x509cert'   => '',
             'privateKey' => '',
         ],
         // Identity Provider Data that we want connect with our SP

app/Config/services.php

@@ -28,16 +28,16 @@ return [
         'redirect'      => env('APP_URL') . '/login/service/github/callback',
         'name'          => 'GitHub',
         'auto_register' => env('GITHUB_AUTO_REGISTER', false),
-        'auto_confirm' => env('GITHUB_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('GITHUB_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'google'   => [
-        'client_id'     => env('GOOGLE_APP_ID', false),
-        'client_secret' => env('GOOGLE_APP_SECRET', false),
-        'redirect'      => env('APP_URL') . '/login/service/google/callback',
-        'name'          => 'Google',
-        'auto_register' => env('GOOGLE_AUTO_REGISTER', false),
-        'auto_confirm' => env('GOOGLE_AUTO_CONFIRM_EMAIL', false),
+        'client_id'      => env('GOOGLE_APP_ID', false),
+        'client_secret'  => env('GOOGLE_APP_SECRET', false),
+        'redirect'       => env('APP_URL') . '/login/service/google/callback',
+        'name'           => 'Google',
+        'auto_register'  => env('GOOGLE_AUTO_REGISTER', false),
+        'auto_confirm'   => env('GOOGLE_AUTO_CONFIRM_EMAIL', false),
         'select_account' => env('GOOGLE_SELECT_ACCOUNT', false),
     ],
 
@@ -47,7 +47,7 @@ return [
         'redirect'      => env('APP_URL') . '/login/service/slack/callback',
         'name'          => 'Slack',
         'auto_register' => env('SLACK_AUTO_REGISTER', false),
-        'auto_confirm' => env('SLACK_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('SLACK_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'facebook'   => [
@@ -56,7 +56,7 @@ return [
         'redirect'      => env('APP_URL') . '/login/service/facebook/callback',
         'name'          => 'Facebook',
         'auto_register' => env('FACEBOOK_AUTO_REGISTER', false),
-        'auto_confirm' => env('FACEBOOK_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('FACEBOOK_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'twitter'   => [
@@ -65,27 +65,27 @@ return [
         'redirect'      => env('APP_URL') . '/login/service/twitter/callback',
         'name'          => 'Twitter',
         'auto_register' => env('TWITTER_AUTO_REGISTER', false),
-        'auto_confirm' => env('TWITTER_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('TWITTER_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'azure'   => [
         'client_id'     => env('AZURE_APP_ID', false),
         'client_secret' => env('AZURE_APP_SECRET', false),
-        'tenant'       => env('AZURE_TENANT', false),
+        'tenant'        => env('AZURE_TENANT', false),
         'redirect'      => env('APP_URL') . '/login/service/azure/callback',
         'name'          => 'Microsoft Azure',
         'auto_register' => env('AZURE_AUTO_REGISTER', false),
-        'auto_confirm' => env('AZURE_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('AZURE_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'okta' => [
-        'client_id' => env('OKTA_APP_ID'),
+        'client_id'     => env('OKTA_APP_ID'),
         'client_secret' => env('OKTA_APP_SECRET'),
-        'redirect' => env('APP_URL') . '/login/service/okta/callback',
-        'base_url' => env('OKTA_BASE_URL'),
+        'redirect'      => env('APP_URL') . '/login/service/okta/callback',
+        'base_url'      => env('OKTA_BASE_URL'),
         'name'          => 'Okta',
         'auto_register' => env('OKTA_AUTO_REGISTER', false),
-        'auto_confirm' => env('OKTA_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('OKTA_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'gitlab' => [
@@ -95,45 +95,45 @@ return [
         'instance_uri'  => env('GITLAB_BASE_URI'), // Needed only for self hosted instances
         'name'          => 'GitLab',
         'auto_register' => env('GITLAB_AUTO_REGISTER', false),
-        'auto_confirm' => env('GITLAB_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('GITLAB_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'twitch' => [
-        'client_id' => env('TWITCH_APP_ID'),
+        'client_id'     => env('TWITCH_APP_ID'),
         'client_secret' => env('TWITCH_APP_SECRET'),
-        'redirect' => env('APP_URL') . '/login/service/twitch/callback',
+        'redirect'      => env('APP_URL') . '/login/service/twitch/callback',
         'name'          => 'Twitch',
         'auto_register' => env('TWITCH_AUTO_REGISTER', false),
-        'auto_confirm' => env('TWITCH_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('TWITCH_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'discord' => [
-        'client_id' => env('DISCORD_APP_ID'),
+        'client_id'     => env('DISCORD_APP_ID'),
         'client_secret' => env('DISCORD_APP_SECRET'),
-        'redirect' => env('APP_URL') . '/login/service/discord/callback',
-        'name' => 'Discord',
+        'redirect'      => env('APP_URL') . '/login/service/discord/callback',
+        'name'          => 'Discord',
         'auto_register' => env('DISCORD_AUTO_REGISTER', false),
-        'auto_confirm' => env('DISCORD_AUTO_CONFIRM_EMAIL', false),
+        'auto_confirm'  => env('DISCORD_AUTO_CONFIRM_EMAIL', false),
     ],
 
     'ldap' => [
-        'server' => env('LDAP_SERVER', false),
-        'dump_user_details' => env('LDAP_DUMP_USER_DETAILS', false),
-        'dn' => env('LDAP_DN', false),
-        'pass' => env('LDAP_PASS', false),
-        'base_dn' => env('LDAP_BASE_DN', false),
-        'user_filter' => env('LDAP_USER_FILTER', '(&(uid=${user}))'),
-        'version' => env('LDAP_VERSION', false),
-        'id_attribute' => env('LDAP_ID_ATTRIBUTE', 'uid'),
-        'email_attribute' => env('LDAP_EMAIL_ATTRIBUTE', 'mail'),
+        'server'                 => env('LDAP_SERVER', false),
+        'dump_user_details'      => env('LDAP_DUMP_USER_DETAILS', false),
+        'dn'                     => env('LDAP_DN', false),
+        'pass'                   => env('LDAP_PASS', false),
+        'base_dn'                => env('LDAP_BASE_DN', false),
+        'user_filter'            => env('LDAP_USER_FILTER', '(&(uid=${user}))'),
+        'version'                => env('LDAP_VERSION', false),
+        'id_attribute'           => env('LDAP_ID_ATTRIBUTE', 'uid'),
+        'email_attribute'        => env('LDAP_EMAIL_ATTRIBUTE', 'mail'),
         'display_name_attribute' => env('LDAP_DISPLAY_NAME_ATTRIBUTE', 'cn'),
-        'follow_referrals' => env('LDAP_FOLLOW_REFERRALS', false),
-        'user_to_groups' => env('LDAP_USER_TO_GROUPS', false),
-        'group_attribute' => env('LDAP_GROUP_ATTRIBUTE', 'memberOf'),
-        'remove_from_groups' => env('LDAP_REMOVE_FROM_GROUPS', false),
-        'tls_insecure' => env('LDAP_TLS_INSECURE', false),
-        'start_tls' => env('LDAP_START_TLS', false),
-        'thumbnail_attribute' => env('LDAP_THUMBNAIL_ATTRIBUTE', null),
+        'follow_referrals'       => env('LDAP_FOLLOW_REFERRALS', false),
+        'user_to_groups'         => env('LDAP_USER_TO_GROUPS', false),
+        'group_attribute'        => env('LDAP_GROUP_ATTRIBUTE', 'memberOf'),
+        'remove_from_groups'     => env('LDAP_REMOVE_FROM_GROUPS', false),
+        'tls_insecure'           => env('LDAP_TLS_INSECURE', false),
+        'start_tls'              => env('LDAP_START_TLS', false),
+        'thumbnail_attribute'    => env('LDAP_THUMBNAIL_ATTRIBUTE', null),
     ],
 
 ];

app/Config/session.php

@@ -1,6 +1,6 @@
 <?php
 
-use \Illuminate\Support\Str;
+use Illuminate\Support\Str;
 
 /**
  * Session configuration options.

app/Config/setting-defaults.php

@@ -26,10 +26,10 @@ return [
 
     // User-level default settings
     'user' => [
-        'dark-mode-enabled' => env('APP_DEFAULT_DARK_MODE', false),
+        'dark-mode-enabled'     => env('APP_DEFAULT_DARK_MODE', false),
         'bookshelves_view_type' => env('APP_VIEWS_BOOKSHELVES', 'grid'),
-        'bookshelf_view_type' =>env('APP_VIEWS_BOOKSHELF', 'grid'),
-        'books_view_type' => env('APP_VIEWS_BOOKS', 'grid'),
+        'bookshelf_view_type'   => env('APP_VIEWS_BOOKSHELF', 'grid'),
+        'books_view_type'       => env('APP_VIEWS_BOOKS', 'grid'),
     ],
 
 ];

app/Config/snappy.php

@@ -14,7 +14,7 @@ return [
         'binary'  => file_exists(base_path('wkhtmltopdf')) ? base_path('wkhtmltopdf') : env('WKHTMLTOPDF', false),
         'timeout' => false,
         'options' => [
-            'outline' => true
+            'outline' => true,
         ],
         'env'     => [],
     ],

app/Console/Commands/CleanupImages.php

@@ -25,11 +25,11 @@ class CleanupImages extends Command
      */
     protected $description = 'Cleanup images and drawings';
 
-
     protected $imageService;
 
     /**
      * Create a new command instance.
+     *
      * @param \BookStack\Uploads\ImageService $imageService
      */
     public function __construct(ImageService $imageService)
@@ -63,6 +63,7 @@ class CleanupImages extends Command
             $this->comment($deleteCount . ' images found that would have been deleted');
             $this->showDeletedImages($deleted);
             $this->comment('Run with -f or --force to perform deletions');
+
             return;
         }
 

app/Console/Commands/ClearViews.php

@@ -23,7 +23,6 @@ class ClearViews extends Command
 
     /**
      * Create a new command instance.
-     *
      */
     public function __construct()
     {

app/Console/Commands/CopyShelfPermissions.php

@@ -54,13 +54,14 @@ class CopyShelfPermissions extends Command
 
         if (!$cascadeAll && !$shelfSlug) {
             $this->error('Either a --slug or --all option must be provided.');
+
             return;
         }
 
         if ($cascadeAll) {
             $continue = $this->confirm(
-                'Permission settings for all shelves will be cascaded. '.
-                        'Books assigned to multiple shelves will receive only the permissions of it\'s last processed shelf. '.
+                'Permission settings for all shelves will be cascaded. ' .
+                        'Books assigned to multiple shelves will receive only the permissions of it\'s last processed shelf. ' .
                         'Are you sure you want to proceed?'
             );
 

app/Console/Commands/CreateAdmin.php

@@ -38,8 +38,9 @@ class CreateAdmin extends Command
     /**
      * Execute the console command.
      *
-     * @return mixed
      * @throws \BookStack\Exceptions\NotFoundException
+     *
+     * @return mixed
      */
     public function handle()
     {
@@ -71,7 +72,6 @@ class CreateAdmin extends Command
             return $this->error('Invalid password provided, Must be at least 5 characters');
         }
 
-
         $user = $this->userRepo->create(['email' => $email, 'name' => $name, 'password' => $password]);
         $this->userRepo->attachSystemRole($user, 'admin');
         $this->userRepo->downloadAndAssignUserAvatar($user);

app/Console/Commands/DeleteUsers.php

@@ -8,7 +8,6 @@ use Illuminate\Console\Command;
 
 class DeleteUsers extends Command
 {
-
     /**
      * The name and signature of the console command.
      *
@@ -47,7 +46,7 @@ class DeleteUsers extends Command
                     continue;
                 }
                 $this->userRepo->destroy($user);
-                ++$numDeleted;
+                $numDeleted++;
             }
             $this->info("Deleted $numDeleted of $totalUsers total users.");
         } else {

app/Console/Commands/ResetMfa.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace BookStack\Console\Commands;
+
+use BookStack\Auth\User;
+use Illuminate\Console\Command;
+
+class ResetMfa extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'bookstack:reset-mfa
+                            {--id= : Numeric ID of the user to reset MFA for}
+                            {--email= : Email address of the user to reset MFA for} 
+                            ';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Reset & Clear any configured MFA methods for the given user';
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $id = $this->option('id');
+        $email = $this->option('email');
+        if (!$id && !$email) {
+            $this->error('Either a --id=<number> or --email=<email> option must be provided.');
+
+            return 1;
+        }
+
+        /** @var User $user */
+        $field = $id ? 'id' : 'email';
+        $value = $id ?: $email;
+        $user = User::query()
+            ->where($field, '=', $value)
+            ->first();
+
+        if (!$user) {
+            $this->error("A user where {$field}={$value} could not be found.");
+
+            return 1;
+        }
+
+        $this->info("This will delete any configure multi-factor authentication methods for user: \n- ID: {$user->id}\n- Name: {$user->name}\n- Email: {$user->email}\n");
+        $this->info('If multi-factor authentication is required for this user they will be asked to reconfigure their methods on next login.');
+        $confirm = $this->confirm('Are you sure you want to proceed?');
+        if ($confirm) {
+            $user->mfaValues()->delete();
+            $this->info('User MFA methods have been reset.');
+
+            return 0;
+        }
+
+        return 1;
+    }
+}

app/Console/Commands/UpdateUrl.php

@@ -4,7 +4,6 @@ namespace BookStack\Console\Commands;
 
 use Illuminate\Console\Command;
 use Illuminate\Database\Connection;
-use Illuminate\Support\Facades\DB;
 
 class UpdateUrl extends Command
 {
@@ -49,7 +48,8 @@ class UpdateUrl extends Command
 
         $urlPattern = '/https?:\/\/(.+)/';
         if (!preg_match($urlPattern, $oldUrl) || !preg_match($urlPattern, $newUrl)) {
-            $this->error("The given urls are expected to be full urls starting with http:// or https://");
+            $this->error('The given urls are expected to be full urls starting with http:// or https://');
+
             return 1;
         }
 
@@ -58,11 +58,11 @@ class UpdateUrl extends Command
         }
 
         $columnsToUpdateByTable = [
-            "attachments" => ["path"],
-            "pages" => ["html", "text", "markdown"],
-            "images" => ["url"],
-            "settings" => ["value"],
-            "comments" => ["html", "text"],
+            'attachments' => ['path'],
+            'pages'       => ['html', 'text', 'markdown'],
+            'images'      => ['url'],
+            'settings'    => ['value'],
+            'comments'    => ['html', 'text'],
         ];
 
         foreach ($columnsToUpdateByTable as $table => $columns) {
@@ -73,7 +73,7 @@ class UpdateUrl extends Command
         }
 
         $jsonColumnsToUpdateByTable = [
-            "settings" => ["value"],
+            'settings' => ['value'],
         ];
 
         foreach ($jsonColumnsToUpdateByTable as $table => $columns) {
@@ -85,10 +85,11 @@ class UpdateUrl extends Command
             }
         }
 
-        $this->info("URL update procedure complete.");
+        $this->info('URL update procedure complete.');
         $this->info('============================================================================');
         $this->info('Be sure to run "php artisan cache:clear" to clear any old URLs in the cache.');
         $this->info('============================================================================');
+
         return 0;
     }
 
@@ -100,8 +101,9 @@ class UpdateUrl extends Command
     {
         $oldQuoted = $this->db->getPdo()->quote($oldUrl);
         $newQuoted = $this->db->getPdo()->quote($newUrl);
+
         return $this->db->table($table)->update([
-            $column => $this->db->raw("REPLACE({$column}, {$oldQuoted}, {$newQuoted})")
+            $column => $this->db->raw("REPLACE({$column}, {$oldQuoted}, {$newQuoted})"),
         ]);
     }
 
@@ -112,8 +114,8 @@ class UpdateUrl extends Command
     protected function checkUserOkayToProceed(string $oldUrl, string $newUrl): bool
     {
         $dangerWarning = "This will search for \"{$oldUrl}\" in your database and replace it with  \"{$newUrl}\".\n";
-        $dangerWarning .= "Are you sure you want to proceed?";
-        $backupConfirmation = "This operation could cause issues if used incorrectly. Have you made a backup of your existing database?";
+        $dangerWarning .= 'Are you sure you want to proceed?';
+        $backupConfirmation = 'This operation could cause issues if used incorrectly. Have you made a backup of your existing database?';
 
         return $this->confirm($dangerWarning) && $this->confirm($backupConfirmation);
     }

app/Console/Commands/UpgradeDatabaseEncoding.php

@@ -23,7 +23,6 @@ class UpgradeDatabaseEncoding extends Command
 
     /**
      * Create a new command instance.
-     *
      */
     public function __construct()
     {
@@ -44,12 +43,12 @@ class UpgradeDatabaseEncoding extends Command
 
         $database = DB::getDatabaseName();
         $tables = DB::select('SHOW TABLES');
-        $this->line('ALTER DATABASE `'.$database.'` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
-        $this->line('USE `'.$database.'`;');
+        $this->line('ALTER DATABASE `' . $database . '` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
+        $this->line('USE `' . $database . '`;');
         $key = 'Tables_in_' . $database;
         foreach ($tables as $table) {
             $tableName = $table->$key;
-            $this->line('ALTER TABLE `'.$tableName.'` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
+            $this->line('ALTER TABLE `' . $tableName . '` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;');
         }
 
         DB::setDefaultConnection($connection);

app/Console/Kernel.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Console;
+<?php
+
+namespace BookStack\Console;
 
 use Illuminate\Console\Scheduling\Schedule;
 use Illuminate\Foundation\Console\Kernel as ConsoleKernel;
@@ -17,7 +19,8 @@ class Kernel extends ConsoleKernel
     /**
      * Define the application's command schedule.
      *
-     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
+     * @param \Illuminate\Console\Scheduling\Schedule $schedule
+     *
      * @return void
      */
     protected function schedule(Schedule $schedule)
@@ -32,6 +35,6 @@ class Kernel extends ConsoleKernel
      */
     protected function commands()
     {
-        $this->load(__DIR__.'/Commands');
+        $this->load(__DIR__ . '/Commands');
     }
 }

app/Entities/BreadcrumbsViewComposer.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities;
+<?php
+
+namespace BookStack\Entities;
 
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Tools\ShelfContext;
@@ -6,11 +8,11 @@ use Illuminate\View\View;
 
 class BreadcrumbsViewComposer
 {
-
     protected $entityContextManager;
 
     /**
      * BreadcrumbsViewComposer constructor.
+     *
      * @param ShelfContext $entityContextManager
      */
     public function __construct(ShelfContext $entityContextManager)
@@ -20,6 +22,7 @@ class BreadcrumbsViewComposer
 
     /**
      * Modify data when the view is composed.
+     *
      * @param View $view
      */
     public function compose(View $view)

app/Entities/EntityProvider.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities;
+<?php
+
+namespace BookStack\Entities;
 
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Bookshelf;
@@ -8,7 +10,7 @@ use BookStack\Entities\Models\Page;
 use BookStack\Entities\Models\PageRevision;
 
 /**
- * Class EntityProvider
+ * Class EntityProvider.
  *
  * Provides access to the core entity models.
  * Wrapped up in this provider since they are often used together
@@ -16,7 +18,6 @@ use BookStack\Entities\Models\PageRevision;
  */
 class EntityProvider
 {
-
     /**
      * @var Bookshelf
      */
@@ -42,7 +43,6 @@ class EntityProvider
      */
     public $pageRevision;
 
-
     public function __construct()
     {
         $this->bookshelf = new Bookshelf();
@@ -55,15 +55,16 @@ class EntityProvider
     /**
      * Fetch all core entity types as an associated array
      * with their basic names as the keys.
+     *
      * @return array<Entity>
      */
     public function all(): array
     {
         return [
             'bookshelf' => $this->bookshelf,
-            'book' => $this->book,
-            'chapter' => $this->chapter,
-            'page' => $this->page,
+            'book'      => $this->book,
+            'chapter'   => $this->chapter,
+            'page'      => $this->page,
         ];
     }
 
@@ -73,6 +74,7 @@ class EntityProvider
     public function get(string $type): Entity
     {
         $type = strtolower($type);
+
         return $this->all()[$type];
     }
 
@@ -86,6 +88,7 @@ class EntityProvider
             $model = $this->get($type);
             $morphClasses[] = $model->getMorphClass();
         }
+
         return $morphClasses;
     }
 }

app/Entities/Models/Book.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Uploads\Image;
 use Exception;
@@ -8,9 +10,10 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Support\Collection;
 
 /**
- * Class Book
- * @property string $description
- * @property int $image_id
+ * Class Book.
+ *
+ * @property string     $description
+ * @property int        $image_id
  * @property Image|null $cover
  */
 class Book extends Entity implements HasCoverImage
@@ -30,8 +33,10 @@ class Book extends Entity implements HasCoverImage
 
     /**
      * Returns book cover image, if book cover not exists return default cover image.
-     * @param int $width - Width of the image
+     *
+     * @param int $width  - Width of the image
      * @param int $height - Height of the image
+     *
      * @return string
      */
     public function getBookCover($width = 440, $height = 250)
@@ -46,11 +51,12 @@ class Book extends Entity implements HasCoverImage
         } catch (Exception $err) {
             $cover = $default;
         }
+
         return $cover;
     }
 
     /**
-     * Get the cover image of the book
+     * Get the cover image of the book.
      */
     public function cover(): BelongsTo
     {
@@ -67,6 +73,7 @@ class Book extends Entity implements HasCoverImage
 
     /**
      * Get all pages within this book.
+     *
      * @return HasMany
      */
     public function pages()
@@ -76,6 +83,7 @@ class Book extends Entity implements HasCoverImage
 
     /**
      * Get the direct child pages of this book.
+     *
      * @return HasMany
      */
     public function directPages()
@@ -85,6 +93,7 @@ class Book extends Entity implements HasCoverImage
 
     /**
      * Get all chapters within this book.
+     *
      * @return HasMany
      */
     public function chapters()
@@ -94,6 +103,7 @@ class Book extends Entity implements HasCoverImage
 
     /**
      * Get the shelves this book is contained within.
+     *
      * @return BelongsToMany
      */
     public function shelves()
@@ -103,12 +113,14 @@ class Book extends Entity implements HasCoverImage
 
     /**
      * Get the direct child items within this book.
+     *
      * @return Collection
      */
     public function getDirectChildren(): Collection
     {
         $pages = $this->directPages()->visible()->get();
         $chapters = $this->chapters()->visible()->get();
+
         return $pages->concat($chapters)->sortBy('priority')->sortByDesc('draft');
     }
 }

app/Entities/Models/BookChild.php

@@ -1,20 +1,38 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
- * Class BookChild
- * @property int $book_id
- * @property int $priority
- * @property Book $book
+ * Class BookChild.
+ *
+ * @property int    $book_id
+ * @property int    $priority
+ * @property string $book_slug
+ * @property Book   $book
+ *
  * @method Builder whereSlugs(string $bookSlug, string $childSlug)
  */
 abstract class BookChild extends Entity
 {
+    protected static function boot()
+    {
+        parent::boot();
+
+        // Load book slugs onto these models by default during query-time
+        static::addGlobalScope('book_slug', function (Builder $builder) {
+            $builder->addSelect(['book_slug' => function ($builder) {
+                $builder->select('slug')
+                    ->from('books')
+                    ->whereColumn('books.id', '=', 'book_id');
+            }]);
+        });
+    }
 
     /**
-     * Scope a query to find items where the the child has the given childSlug
+     * Scope a query to find items where the child has the given childSlug
      * where its parent has the bookSlug.
      */
     public function scopeWhereSlugs(Builder $query, string $bookSlug, string $childSlug)

app/Entities/Models/Bookshelf.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Uploads\Image;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
@@ -17,6 +19,7 @@ class Bookshelf extends Entity implements HasCoverImage
     /**
      * Get the books in this shelf.
      * Should not be used directly since does not take into account permissions.
+     *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
      */
     public function books()
@@ -44,8 +47,10 @@ class Bookshelf extends Entity implements HasCoverImage
 
     /**
      * Returns BookShelf cover image, if cover does not exists return default cover image.
-     * @param int $width - Width of the image
+     *
+     * @param int $width  - Width of the image
      * @param int $height - Height of the image
+     *
      * @return string
      */
     public function getBookCover($width = 440, $height = 250)
@@ -61,11 +66,12 @@ class Bookshelf extends Entity implements HasCoverImage
         } catch (\Exception $err) {
             $cover = $default;
         }
+
         return $cover;
     }
 
     /**
-     * Get the cover image of the shelf
+     * Get the cover image of the shelf.
      */
     public function cover(): BelongsTo
     {
@@ -82,7 +88,9 @@ class Bookshelf extends Entity implements HasCoverImage
 
     /**
      * Check if this shelf contains the given book.
+     *
      * @param Book $book
+     *
      * @return bool
      */
     public function contains(Book $book): bool
@@ -92,6 +100,7 @@ class Bookshelf extends Entity implements HasCoverImage
 
     /**
      * Add a book to the end of this shelf.
+     *
      * @param Book $book
      */
     public function appendBook(Book $book)

app/Entities/Models/Chapter.php

@@ -1,10 +1,14 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use Illuminate\Support\Collection;
 
 /**
- * Class Chapter
+ * Class Chapter.
+ *
  * @property Collection<Page> $pages
+ * @property mixed description
  */
 class Chapter extends BookChild
 {
@@ -15,7 +19,9 @@ class Chapter extends BookChild
 
     /**
      * Get the pages that this chapter contains.
+     *
      * @param string $dir
+     *
      * @return mixed
      */
     public function pages($dir = 'ASC')
@@ -30,7 +36,7 @@ class Chapter extends BookChild
     {
         $parts = [
             'books',
-            urlencode($this->getAttribute('bookSlug') ?? $this->book->slug),
+            urlencode($this->book_slug ?? $this->book->slug),
             'chapter',
             urlencode($this->slug),
             trim($path, '/'),

app/Entities/Models/Deletion.php

@@ -1,15 +1,18 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Auth\User;
-use BookStack\Entities\Models\Entity;
 use BookStack\Interfaces\Loggable;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\MorphTo;
 
+/**
+ * @property Model deletable
+ */
 class Deletion extends Model implements Loggable
 {
-
     /**
      * Get the related deletable record.
      */
@@ -32,17 +35,27 @@ class Deletion extends Model implements Loggable
     public static function createForEntity(Entity $entity): Deletion
     {
         $record = (new self())->forceFill([
-            'deleted_by' => user()->id,
+            'deleted_by'     => user()->id,
             'deletable_type' => $entity->getMorphClass(),
-            'deletable_id' => $entity->id,
+            'deletable_id'   => $entity->id,
         ]);
         $record->save();
+
         return $record;
     }
 
     public function logDescriptor(): string
     {
         $deletable = $this->deletable()->first();
+
         return "Deletion ({$this->id}) for {$deletable->getType()} ({$deletable->id}) {$deletable->name}";
     }
+
+    /**
+     * Get a URL for this specific deletion.
+     */
+    public function getUrl($path): string
+    {
+        return url("/settings/recycle-bin/{$this->id}/" . ltrim($path, '/'));
+    }
 }

app/Entities/Models/Entity.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Actions\Activity;
 use BookStack\Actions\Comment;
@@ -27,15 +29,16 @@ use Illuminate\Database\Eloquent\SoftDeletes;
  * The base class for book-like items such as pages, chapters & books.
  * This is not a database model in itself but extended.
  *
- * @property int $id
- * @property string $name
- * @property string $slug
- * @property Carbon $created_at
- * @property Carbon $updated_at
- * @property int $created_by
- * @property int $updated_by
- * @property boolean $restricted
+ * @property int        $id
+ * @property string     $name
+ * @property string     $slug
+ * @property Carbon     $created_at
+ * @property Carbon     $updated_at
+ * @property int        $created_by
+ * @property int        $updated_by
+ * @property bool       $restricted
  * @property Collection $tags
+ *
  * @method static Entity|Builder visible()
  * @method static Entity|Builder hasPermission(string $permission)
  * @method static Builder withLastView()
@@ -154,11 +157,12 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     }
 
     /**
-     * Get the comments for an entity
+     * Get the comments for an entity.
      */
     public function comments(bool $orderByCreated = true): MorphMany
     {
         $query = $this->morphMany(Comment::class, 'entity');
+
         return $orderByCreated ? $query->orderBy('created_at', 'asc') : $query;
     }
 
@@ -205,7 +209,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
 
     /**
      * Check if this instance or class is a certain type of entity.
-     * Examples of $type are 'page', 'book', 'chapter'
+     * Examples of $type are 'page', 'book', 'chapter'.
      */
     public static function isA(string $type): bool
     {
@@ -218,6 +222,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     public static function getType(): string
     {
         $className = array_slice(explode('\\', static::class), -1, 1)[0];
+
         return strtolower($className);
     }
 
@@ -229,6 +234,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
         if (mb_strlen($this->name) <= $length) {
             return $this->name;
         }
+
         return mb_substr($this->name, 0, $length - 3) . '...';
     }
 
@@ -248,14 +254,14 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
         $text = $this->getText();
 
         if (mb_strlen($text) > $length) {
-            $text = mb_substr($text, 0, $length-3) . '...';
+            $text = mb_substr($text, 0, $length - 3) . '...';
         }
 
         return trim($text);
     }
 
     /**
-     * Get the url of this entity
+     * Get the url of this entity.
      */
     abstract public function getUrl(string $path = '/'): string;
 
@@ -266,12 +272,13 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
      */
     public function getParent(): ?Entity
     {
-        if ($this->isA('page')) {
+        if ($this instanceof Page) {
             return $this->chapter_id ? $this->chapter()->withTrashed()->first() : $this->book()->withTrashed()->first();
         }
-        if ($this->isA('chapter')) {
+        if ($this instanceof Chapter) {
             return $this->book()->withTrashed()->first();
         }
+
         return null;
     }
 
@@ -285,7 +292,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     }
 
     /**
-     * Index the current entity for search
+     * Index the current entity for search.
      */
     public function indexForSearch()
     {
@@ -298,6 +305,7 @@ abstract class Entity extends Model implements Sluggable, Favouritable, Viewable
     public function refreshSlug(): string
     {
         $this->slug = app(SlugGenerator::class)->generate($this);
+
         return $this->slug;
     }
 

app/Entities/Models/HasCoverImage.php

@@ -1,13 +1,11 @@
 <?php
 
-
 namespace BookStack\Entities\Models;
 
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 interface HasCoverImage
 {
-
     /**
      * Get the cover image for this item.
      */

app/Entities/Models/Page.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Entities\Tools\PageContent;
 use BookStack\Uploads\Attachment;
@@ -9,29 +11,31 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
 use Permissions;
 
 /**
- * Class Page
- * @property int $chapter_id
- * @property string $html
- * @property string $markdown
- * @property string $text
- * @property bool $template
- * @property bool $draft
- * @property int $revision_count
- * @property Chapter $chapter
+ * Class Page.
+ *
+ * @property int        $chapter_id
+ * @property string     $html
+ * @property string     $markdown
+ * @property string     $text
+ * @property bool       $template
+ * @property bool       $draft
+ * @property int        $revision_count
+ * @property Chapter    $chapter
  * @property Collection $attachments
  */
 class Page extends BookChild
 {
-    protected $fillable = ['name', 'priority', 'markdown'];
+    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 $simpleAttributes = ['name', 'id', 'slug'];
+    protected $fillable = ['name', 'priority', 'markdown'];
 
     public $textField = 'text';
 
     protected $hidden = ['html', 'markdown', 'text', 'restricted', 'pivot', 'deleted_at'];
 
     protected $casts = [
-        'draft' => 'boolean',
+        'draft'    => 'boolean',
         'template' => 'boolean',
     ];
 
@@ -41,22 +45,13 @@ class Page extends BookChild
     public function scopeVisible(Builder $query): Builder
     {
         $query = Permissions::enforceDraftVisibilityOnQuery($query);
+
         return parent::scopeVisible($query);
     }
 
-    /**
-     * Converts this page into a simplified array.
-     * @return mixed
-     */
-    public function toSimpleArray()
-    {
-        $array = array_intersect_key($this->toArray(), array_flip($this->simpleAttributes));
-        $array['url'] = $this->getUrl();
-        return $array;
-    }
-
     /**
      * Get the chapter that this page is in, If applicable.
+     *
      * @return BelongsTo
      */
     public function chapter()
@@ -66,6 +61,7 @@ class Page extends BookChild
 
     /**
      * Check if this page has a chapter.
+     *
      * @return bool
      */
     public function hasChapter()
@@ -96,6 +92,7 @@ class Page extends BookChild
 
     /**
      * Get the attachments assigned to this page.
+     *
      * @return HasMany
      */
     public function attachments()
@@ -110,7 +107,7 @@ class Page extends BookChild
     {
         $parts = [
             'books',
-            urlencode($this->getAttribute('bookSlug') ?? $this->book->slug),
+            urlencode($this->book_slug ?? $this->book->slug),
             $this->draft ? 'draft' : 'page',
             $this->draft ? $this->id : urlencode($this->slug),
             trim($path, '/'),
@@ -120,7 +117,8 @@ class Page extends BookChild
     }
 
     /**
-     * Get the current revision for the page if existing
+     * Get the current revision for the page if existing.
+     *
      * @return PageRevision|null
      */
     public function getCurrentRevision()
@@ -136,6 +134,7 @@ class Page extends BookChild
         $refreshed = $this->refresh()->unsetRelations()->load(['tags', 'createdBy', 'updatedBy', 'ownedBy']);
         $refreshed->setHidden(array_diff($refreshed->getHidden(), ['html', 'markdown']));
         $refreshed->html = (new PageContent($refreshed))->render();
+
         return $refreshed;
     }
 }

app/Entities/Models/PageRevision.php

@@ -1,29 +1,32 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Auth\User;
-use BookStack\Entities\Models\Page;
 use BookStack\Model;
 use Carbon\Carbon;
 
 /**
- * Class PageRevision
- * @property int $page_id
+ * Class PageRevision.
+ *
+ * @property int    $page_id
  * @property string $slug
  * @property string $book_slug
- * @property int $created_by
+ * @property int    $created_by
  * @property Carbon $created_at
  * @property string $type
  * @property string $summary
  * @property string $markdown
  * @property string $html
- * @property int $revision_number
+ * @property int    $revision_number
  */
 class PageRevision extends Model
 {
     protected $fillable = ['name', 'html', 'text', 'markdown', 'summary'];
 
     /**
-     * Get the user that created the page revision
+     * Get the user that created the page revision.
+     *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function createdBy()
@@ -33,6 +36,7 @@ class PageRevision extends Model
 
     /**
      * Get the page this revision originates from.
+     *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function page()
@@ -42,7 +46,9 @@ class PageRevision extends Model
 
     /**
      * Get the url for this revision.
+     *
      * @param null|string $path
+     *
      * @return string
      */
     public function getUrl($path = null)
@@ -51,11 +57,13 @@ class PageRevision extends Model
         if ($path) {
             return $url . '/' . trim($path, '/');
         }
+
         return $url;
     }
 
     /**
-     * Get the previous revision for the same page if existing
+     * Get the previous revision for the same page if existing.
+     *
      * @return \BookStack\Entities\PageRevision|null
      */
     public function getPrevious()
@@ -74,8 +82,10 @@ class PageRevision extends Model
     /**
      * Allows checking of the exact class, Used to check entity type.
      * Included here to align with entities in similar use cases.
-     * (Yup, Bit of an awkward hack)
+     * (Yup, Bit of an awkward hack).
+     *
      * @param $type
+     *
      * @return bool
      */
     public static function isA($type)

app/Entities/Models/SearchTerm.php

@@ -1,15 +1,17 @@
-<?php namespace BookStack\Entities\Models;
+<?php
+
+namespace BookStack\Entities\Models;
 
 use BookStack\Model;
 
 class SearchTerm extends Model
 {
-
     protected $fillable = ['term', 'entity_id', 'entity_type', 'score'];
     public $timestamps = false;
 
     /**
-     * Get the entity that this term belongs to
+     * Get the entity that this term belongs to.
+     *
      * @return \Illuminate\Database\Eloquent\Relations\MorphTo
      */
     public function entity()

app/Entities/Queries/EntityQuery.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Queries;
+<?php
+
+namespace BookStack\Entities\Queries;
 
 use BookStack\Auth\Permissions\PermissionService;
 use BookStack\Entities\EntityProvider;
@@ -14,4 +16,4 @@ abstract class EntityQuery
     {
         return app()->make(EntityProvider::class);
     }
-}
+}

app/Entities/Queries/Popular.php

@@ -1,5 +1,6 @@
-<?php namespace BookStack\Entities\Queries;
+<?php
 
+namespace BookStack\Entities\Queries;
 
 use BookStack\Actions\View;
 use Illuminate\Support\Facades\DB;
@@ -25,5 +26,4 @@ class Popular extends EntityQuery
             ->pluck('viewable')
             ->filter();
     }
-
-}
+}

app/Entities/Queries/RecentlyViewed.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Queries;
+<?php
+
+namespace BookStack\Entities\Queries;
 
 use BookStack\Actions\View;
 use Illuminate\Support\Collection;

app/Entities/Queries/TopFavourites.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Queries;
+<?php
+
+namespace BookStack\Entities\Queries;
 
 use BookStack\Actions\Favourite;
 use Illuminate\Database\Query\JoinClause;

app/Entities/Repos/BaseRepo.php

@@ -2,24 +2,18 @@
 
 namespace BookStack\Entities\Repos;
 
-use BookStack\Actions\ActivityType;
 use BookStack\Actions\TagRepo;
-use BookStack\Auth\User;
 use BookStack\Entities\Models\Entity;
 use BookStack\Entities\Models\HasCoverImage;
 use BookStack\Exceptions\ImageUploadException;
-use BookStack\Facades\Activity;
 use BookStack\Uploads\ImageRepo;
 use Illuminate\Http\UploadedFile;
-use Illuminate\Support\Collection;
 
 class BaseRepo
 {
-
     protected $tagRepo;
     protected $imageRepo;
 
-
     public function __construct(TagRepo $tagRepo, ImageRepo $imageRepo)
     {
         $this->tagRepo = $tagRepo;
@@ -27,7 +21,7 @@ class BaseRepo
     }
 
     /**
-     * Create a new entity in the system
+     * Create a new entity in the system.
      */
     public function create(Entity $entity, array $input)
     {
@@ -35,7 +29,7 @@ class BaseRepo
         $entity->forceFill([
             'created_by' => user()->id,
             'updated_by' => user()->id,
-            'owned_by' => user()->id,
+            'owned_by'   => user()->id,
         ]);
         $entity->refreshSlug();
         $entity->save();
@@ -72,6 +66,7 @@ class BaseRepo
 
     /**
      * Update the given items' cover image, or clear it.
+     *
      * @throws ImageUploadException
      * @throws \Exception
      */

app/Entities/Repos/BookRepo.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Repos;
+<?php
+
+namespace BookStack\Entities\Repos;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Actions\TagRepo;
@@ -15,7 +17,6 @@ use Illuminate\Support\Collection;
 
 class BookRepo
 {
-
     protected $baseRepo;
     protected $tagRepo;
     protected $imageRepo;
@@ -84,13 +85,14 @@ class BookRepo
     }
 
     /**
-     * Create a new book in the system
+     * Create a new book in the system.
      */
     public function create(array $input): Book
     {
         $book = new Book();
         $this->baseRepo->create($book, $input);
         Activity::addForEntity($book, ActivityType::BOOK_CREATE);
+
         return $book;
     }
 
@@ -101,11 +103,13 @@ class BookRepo
     {
         $this->baseRepo->update($book, $input);
         Activity::addForEntity($book, ActivityType::BOOK_UPDATE);
+
         return $book;
     }
 
     /**
      * Update the given book's cover image, or clear it.
+     *
      * @throws ImageUploadException
      * @throws Exception
      */
@@ -116,6 +120,7 @@ class BookRepo
 
     /**
      * Remove a book from the system.
+     *
      * @throws Exception
      */
     public function destroy(Book $book)

app/Entities/Repos/BookshelfRepo.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Repos;
+<?php
+
+namespace BookStack\Entities\Repos;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Entities\Models\Book;
@@ -89,6 +91,7 @@ class BookshelfRepo
         $this->baseRepo->create($shelf, $input);
         $this->updateBooks($shelf, $bookIds);
         Activity::addForEntity($shelf, ActivityType::BOOKSHELF_CREATE);
+
         return $shelf;
     }
 
@@ -104,6 +107,7 @@ class BookshelfRepo
         }
 
         Activity::addForEntity($shelf, ActivityType::BOOKSHELF_UPDATE);
+
         return $shelf;
     }
 
@@ -129,6 +133,7 @@ class BookshelfRepo
 
     /**
      * Update the given shelf cover image, or clear it.
+     *
      * @throws ImageUploadException
      * @throws Exception
      */
@@ -164,6 +169,7 @@ class BookshelfRepo
 
     /**
      * Remove a bookshelf from the system.
+     *
      * @throws Exception
      */
     public function destroy(Bookshelf $shelf)

app/Entities/Repos/ChapterRepo.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Repos;
+<?php
+
+namespace BookStack\Entities\Repos;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Entities\Models\Book;
@@ -9,11 +11,9 @@ use BookStack\Exceptions\MoveOperationException;
 use BookStack\Exceptions\NotFoundException;
 use BookStack\Facades\Activity;
 use Exception;
-use Illuminate\Support\Collection;
 
 class ChapterRepo
 {
-
     protected $baseRepo;
 
     /**
@@ -26,6 +26,7 @@ class ChapterRepo
 
     /**
      * Get a chapter via the slug.
+     *
      * @throws NotFoundException
      */
     public function getBySlug(string $bookSlug, string $chapterSlug): Chapter
@@ -49,6 +50,7 @@ class ChapterRepo
         $chapter->priority = (new BookContents($parentBook))->getLastPriority() + 1;
         $this->baseRepo->create($chapter, $input);
         Activity::addForEntity($chapter, ActivityType::CHAPTER_CREATE);
+
         return $chapter;
     }
 
@@ -59,11 +61,13 @@ class ChapterRepo
     {
         $this->baseRepo->update($chapter, $input);
         Activity::addForEntity($chapter, ActivityType::CHAPTER_UPDATE);
+
         return $chapter;
     }
 
     /**
      * Remove a chapter from the system.
+     *
      * @throws Exception
      */
     public function destroy(Chapter $chapter)
@@ -77,7 +81,8 @@ class ChapterRepo
     /**
      * Move the given chapter into a new parent book.
      * The $parentIdentifier must be a string of the following format:
-     * 'book:<id>' (book:5)
+     * 'book:<id>' (book:5).
+     *
      * @throws MoveOperationException
      */
     public function move(Chapter $chapter, string $parentIdentifier): Book

app/Entities/Repos/PageRepo.php

@@ -1,14 +1,16 @@
-<?php namespace BookStack\Entities\Repos;
+<?php
+
+namespace BookStack\Entities\Repos;
 
 use BookStack\Actions\ActivityType;
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\Page;
+use BookStack\Entities\Models\PageRevision;
 use BookStack\Entities\Tools\BookContents;
 use BookStack\Entities\Tools\PageContent;
 use BookStack\Entities\Tools\TrashCan;
-use BookStack\Entities\Models\Page;
-use BookStack\Entities\Models\PageRevision;
 use BookStack\Exceptions\MoveOperationException;
 use BookStack\Exceptions\NotFoundException;
 use BookStack\Exceptions\PermissionsException;
@@ -16,11 +18,9 @@ use BookStack\Facades\Activity;
 use Exception;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Pagination\LengthAwarePaginator;
-use Illuminate\Support\Collection;
 
 class PageRepo
 {
-
     protected $baseRepo;
 
     /**
@@ -33,6 +33,7 @@ class PageRepo
 
     /**
      * Get a page by ID.
+     *
      * @throws NotFoundException
      */
     public function getById(int $id, array $relations = ['book']): Page
@@ -48,6 +49,7 @@ class PageRepo
 
     /**
      * Get a page its book and own slug.
+     *
      * @throws NotFoundException
      */
     public function getBySlug(string $bookSlug, string $pageSlug): Page
@@ -77,6 +79,7 @@ class PageRepo
             ->orderBy('created_at', 'desc')
             ->with('page')
             ->first();
+
         return $revision ? $revision->page : null;
     }
 
@@ -119,6 +122,7 @@ class PageRepo
     public function getUserDraft(Page $page): ?PageRevision
     {
         $revision = $this->getUserDraftQuery($page)->first();
+
         return $revision;
     }
 
@@ -128,11 +132,11 @@ class PageRepo
     public function getNewDraftPage(Entity $parent)
     {
         $page = (new Page())->forceFill([
-            'name' => trans('entities.pages_initial_name'),
+            'name'       => trans('entities.pages_initial_name'),
             'created_by' => user()->id,
-            'owned_by' => user()->id,
+            'owned_by'   => user()->id,
             'updated_by' => user()->id,
-            'draft' => true,
+            'draft'      => true,
         ]);
 
         if ($parent instanceof Chapter) {
@@ -144,6 +148,7 @@ class PageRepo
 
         $page->save();
         $page->refresh()->rebuildPermissions();
+
         return $page;
     }
 
@@ -166,6 +171,7 @@ class PageRepo
         $draft->refresh();
 
         Activity::addForEntity($draft, ActivityType::PAGE_CREATE);
+
         return $draft;
     }
 
@@ -190,7 +196,7 @@ class PageRepo
         $this->getUserDraftQuery($page)->delete();
 
         // Save a revision after updating
-        $summary = trim($input['summary'] ?? "");
+        $summary = trim($input['summary'] ?? '');
         $htmlChanged = isset($input['html']) && $input['html'] !== $oldHtml;
         $nameChanged = isset($input['name']) && $input['name'] !== $oldName;
         $markdownChanged = isset($input['markdown']) && $input['markdown'] !== $oldMarkdown;
@@ -199,6 +205,7 @@ class PageRepo
         }
 
         Activity::addForEntity($page, ActivityType::PAGE_UPDATE);
+
         return $page;
     }
 
@@ -211,8 +218,8 @@ class PageRepo
         $pageContent = new PageContent($page);
         if (!empty($input['markdown'] ?? '')) {
             $pageContent->setNewMarkdown($input['markdown']);
-        } else {
-            $pageContent->setNewHTML($input['html'] ?? '');
+        } elseif (isset($input['html'])) {
+            $pageContent->setNewHTML($input['html']);
         }
     }
 
@@ -234,6 +241,7 @@ class PageRepo
         $revision->save();
 
         $this->deleteOldRevisions($page);
+
         return $revision;
     }
 
@@ -249,6 +257,7 @@ class PageRepo
             }
             $page->fill($input);
             $page->save();
+
             return $page;
         }
 
@@ -260,11 +269,13 @@ class PageRepo
         }
 
         $draft->save();
+
         return $draft;
     }
 
     /**
      * Destroy a page from the system.
+     *
      * @throws Exception
      */
     public function destroy(Page $page)
@@ -291,7 +302,7 @@ class PageRepo
         } else {
             $content->setNewHTML($revision->html);
         }
-        
+
         $page->updated_by = user()->id;
         $page->refreshSlug();
         $page->save();
@@ -301,13 +312,15 @@ class PageRepo
         $this->savePageRevision($page, $summary);
 
         Activity::addForEntity($page, ActivityType::PAGE_RESTORE);
+
         return $page;
     }
 
     /**
      * Move the given page into a new parent book or chapter.
      * The $parentIdentifier must be a string of the following format:
-     * 'book:<id>' (book:5)
+     * 'book:<id>' (book:5).
+     *
      * @throws MoveOperationException
      * @throws PermissionsException
      */
@@ -327,12 +340,14 @@ class PageRepo
         $page->rebuildPermissions();
 
         Activity::addForEntity($page, ActivityType::PAGE_MOVE);
+
         return $parent;
     }
 
     /**
      * Copy an existing page in the system.
      * Optionally providing a new parent via string identifier and a new name.
+     *
      * @throws MoveOperationException
      * @throws PermissionsException
      */
@@ -369,7 +384,8 @@ class PageRepo
     /**
      * Find a page parent entity via a identifier string in the format:
      * {type}:{id}
-     * Example: (book:5)
+     * Example: (book:5).
+     *
      * @throws MoveOperationException
      */
     protected function findParentByIdentifier(string $identifier): ?Entity
@@ -383,6 +399,7 @@ class PageRepo
         }
 
         $parentClass = $entityType === 'book' ? Book::class : Chapter::class;
+
         return $parentClass::visible()->where('id', '=', $entityId)->first();
     }
 
@@ -420,6 +437,7 @@ class PageRepo
         $draft->book_slug = $page->book->slug;
         $draft->created_by = user()->id;
         $draft->type = 'update_draft';
+
         return $draft;
     }
 
@@ -445,13 +463,14 @@ class PageRepo
     }
 
     /**
-     * Get a new priority for a page
+     * Get a new priority for a page.
      */
     protected function getNewPriority(Page $page): int
     {
         $parent = $page->getParent();
         if ($parent instanceof Chapter) {
             $lastPage = $parent->pages('desc')->first();
+
             return $lastPage ? $lastPage->priority + 1 : 0;
         }
 

app/Entities/Tools/BookContents.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Tools;
+<?php
+
+namespace BookStack\Entities\Tools;
 
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\BookChild;
@@ -10,7 +12,6 @@ use Illuminate\Support\Collection;
 
 class BookContents
 {
-
     /**
      * @var Book
      */
@@ -35,6 +36,7 @@ class BookContents
             ->where('chapter_id', '=', 0)->max('priority');
         $maxChapter = Chapter::visible()->where('book_id', '=', $this->book->id)
             ->max('priority');
+
         return max($maxChapter, $maxPage, 1);
     }
 
@@ -43,7 +45,7 @@ class BookContents
      */
     public function getTree(bool $showDrafts = false, bool $renderPages = false): Collection
     {
-        $pages = $this->getPages($showDrafts);
+        $pages = $this->getPages($showDrafts, $renderPages);
         $chapters = Chapter::visible()->where('book_id', '=', $this->book->id)->get();
         $all = collect()->concat($pages)->concat($chapters);
         $chapterMap = $chapters->keyBy('id');
@@ -83,6 +85,7 @@ class BookContents
             if (isset($entity['draft']) && $entity['draft']) {
                 return -100;
             }
+
             return $entity['priority'] ?? 0;
         };
     }
@@ -90,9 +93,11 @@ class BookContents
     /**
      * Get the visible pages within this book.
      */
-    protected function getPages(bool $showDrafts = false): Collection
+    protected function getPages(bool $showDrafts = false, bool $getPageContent = false): Collection
     {
-        $query = Page::visible()->where('book_id', '=', $this->book->id);
+        $query = Page::visible()
+            ->select($getPageContent ? Page::$contentAttributes : Page::$listAttributes)
+            ->where('book_id', '=', $this->book->id);
 
         if (!$showDrafts) {
             $query->where('draft', '=', false);
@@ -110,9 +115,10 @@ class BookContents
      *     +"parentChapter": false (ID of parent chapter, as string, or false)
      *     +"type": "page" (Entity type of item)
      *     +"book": "1" (Id of book to place item in)
-     *   }
+     *   }.
      *
      * Returns a list of books that were involved in the operation.
+     *
      * @throws SortOperationException
      */
     public function sortUsingMap(Collection $sortMap): Collection
@@ -190,6 +196,7 @@ class BookContents
     /**
      * Get the books involved in a sort.
      * The given sort map should have its models loaded first.
+     *
      * @throws SortOperationException
      */
     protected function getBooksInvolvedInSort(Collection $sortMap): Collection
@@ -202,7 +209,7 @@ class BookContents
         $books = Book::hasPermission('update')->whereIn('id', $bookIdsInvolved)->get();
 
         if (count($books) !== count($bookIdsInvolved)) {
-            throw new SortOperationException("Could not find all books requested in sort operation");
+            throw new SortOperationException('Could not find all books requested in sort operation');
         }
 
         return $books;

app/Entities/Tools/ExportFormatter.php

@@ -1,8 +1,11 @@
-<?php namespace BookStack\Entities\Tools;
+<?php
+
+namespace BookStack\Entities\Tools;
 
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Chapter;
 use BookStack\Entities\Models\Page;
+use BookStack\Entities\Tools\Markdown\HtmlToMarkdown;
 use BookStack\Uploads\ImageService;
 use DomPDF;
 use Exception;
@@ -11,7 +14,6 @@ use Throwable;
 
 class ExportFormatter
 {
-
     protected $imageService;
 
     /**
@@ -25,20 +27,23 @@ class ExportFormatter
     /**
      * Convert a page to a self-contained HTML file.
      * Includes required CSS & image content. Images are base64 encoded into the HTML.
+     *
      * @throws Throwable
      */
     public function pageToContainedHtml(Page $page)
     {
         $page->html = (new PageContent($page))->render();
         $pageHtml = view('pages.export', [
-            'page' => $page,
+            'page'   => $page,
             'format' => 'html',
         ])->render();
+
         return $this->containHtml($pageHtml);
     }
 
     /**
      * Convert a chapter to a self-contained HTML file.
+     *
      * @throws Throwable
      */
     public function chapterToContainedHtml(Chapter $chapter)
@@ -49,43 +54,49 @@ class ExportFormatter
         });
         $html = view('chapters.export', [
             'chapter' => $chapter,
-            'pages' => $pages,
-            'format' => 'html',
+            'pages'   => $pages,
+            'format'  => 'html',
         ])->render();
+
         return $this->containHtml($html);
     }
 
     /**
      * Convert a book to a self-contained HTML file.
+     *
      * @throws Throwable
      */
     public function bookToContainedHtml(Book $book)
     {
         $bookTree = (new BookContents($book))->getTree(false, true);
         $html = view('books.export', [
-            'book' => $book,
+            'book'         => $book,
             'bookChildren' => $bookTree,
-            'format' => 'html',
+            'format'       => 'html',
         ])->render();
+
         return $this->containHtml($html);
     }
 
     /**
      * Convert a page to a PDF file.
+     *
      * @throws Throwable
      */
     public function pageToPdf(Page $page)
     {
         $page->html = (new PageContent($page))->render();
         $html = view('pages.export', [
-            'page' => $page,
+            'page'   => $page,
             'format' => 'pdf',
         ])->render();
+
         return $this->htmlToPdf($html);
     }
 
     /**
      * Convert a chapter to a PDF file.
+     *
      * @throws Throwable
      */
     public function chapterToPdf(Chapter $chapter)
@@ -97,8 +108,8 @@ class ExportFormatter
 
         $html = view('chapters.export', [
             'chapter' => $chapter,
-            'pages' => $pages,
-            'format' => 'pdf',
+            'pages'   => $pages,
+            'format'  => 'pdf',
         ])->render();
 
         return $this->htmlToPdf($html);
@@ -106,38 +117,43 @@ class ExportFormatter
 
     /**
      * Convert a book to a PDF file.
+     *
      * @throws Throwable
      */
     public function bookToPdf(Book $book)
     {
         $bookTree = (new BookContents($book))->getTree(false, true);
         $html = view('books.export', [
-            'book' => $book,
+            'book'         => $book,
             'bookChildren' => $bookTree,
-            'format' => 'pdf',
+            'format'       => 'pdf',
         ])->render();
+
         return $this->htmlToPdf($html);
     }
 
     /**
      * Convert normal web-page HTML to a PDF.
+     *
      * @throws Exception
      */
     protected function htmlToPdf(string $html): string
     {
         $containedHtml = $this->containHtml($html);
-        $useWKHTML = config('snappy.pdf.binary') !== false;
+        $useWKHTML = config('snappy.pdf.binary') !== false && config('app.allow_untrusted_server_fetching') === true;
         if ($useWKHTML) {
             $pdf = SnappyPDF::loadHTML($containedHtml);
             $pdf->setOption('print-media-type', true);
         } else {
             $pdf = DomPDF::loadHTML($containedHtml);
         }
+
         return $pdf->output();
     }
 
     /**
      * Bundle of the contents of a html file to be self-contained.
+     *
      * @throws Exception
      */
     protected function containHtml(string $htmlContent): string
@@ -194,6 +210,7 @@ class ExportFormatter
         $text = html_entity_decode($text);
         // Add title
         $text = $page->name . "\n\n" . $text;
+
         return $text;
     }
 
@@ -207,6 +224,7 @@ class ExportFormatter
         foreach ($chapter->getVisiblePages() as $page) {
             $text .= $this->pageToPlainText($page);
         }
+
         return $text;
     }
 
@@ -224,6 +242,51 @@ class ExportFormatter
                 $text .= $this->pageToPlainText($bookChild);
             }
         }
+
+        return $text;
+    }
+
+    /**
+     * Convert a page to a Markdown file.
+     */
+    public function pageToMarkdown(Page $page): string
+    {
+        if ($page->markdown) {
+            return '# ' . $page->name . "\n\n" . $page->markdown;
+        }
+
+        return '# ' . $page->name . "\n\n" . (new HtmlToMarkdown($page->html))->convert();
+    }
+
+    /**
+     * Convert a chapter to a Markdown file.
+     */
+    public function chapterToMarkdown(Chapter $chapter): string
+    {
+        $text = '# ' . $chapter->name . "\n\n";
+        $text .= $chapter->description . "\n\n";
+        foreach ($chapter->pages as $page) {
+            $text .= $this->pageToMarkdown($page) . "\n\n";
+        }
+
+        return $text;
+    }
+
+    /**
+     * Convert a book into a plain text string.
+     */
+    public function bookToMarkdown(Book $book): string
+    {
+        $bookTree = (new BookContents($book))->getTree(false, true);
+        $text = '# ' . $book->name . "\n\n";
+        foreach ($bookTree as $bookChild) {
+            if ($bookChild instanceof Chapter) {
+                $text .= $this->chapterToMarkdown($bookChild);
+            } else {
+                $text .= $this->pageToMarkdown($bookChild);
+            }
+        }
+
         return $text;
     }
 }

app/Entities/Tools/Markdown/CustomListItemRenderer.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace BookStack\Entities\Tools\Markdown;
+
+use League\CommonMark\Block\Element\AbstractBlock;
+use League\CommonMark\Block\Element\ListItem;
+use League\CommonMark\Block\Element\Paragraph;
+use League\CommonMark\Block\Renderer\BlockRendererInterface;
+use League\CommonMark\Block\Renderer\ListItemRenderer;
+use League\CommonMark\ElementRendererInterface;
+use League\CommonMark\Extension\TaskList\TaskListItemMarker;
+use League\CommonMark\HtmlElement;
+
+class CustomListItemRenderer implements BlockRendererInterface
+{
+    protected $baseRenderer;
+
+    public function __construct()
+    {
+        $this->baseRenderer = new ListItemRenderer();
+    }
+
+    /**
+     * @return HtmlElement|string|null
+     */
+    public function render(AbstractBlock $block, ElementRendererInterface $htmlRenderer, bool $inTightList = false)
+    {
+        $listItem = $this->baseRenderer->render($block, $htmlRenderer, $inTightList);
+
+        if ($this->startsTaskListItem($block)) {
+            $listItem->setAttribute('class', 'task-list-item');
+        }
+
+        return $listItem;
+    }
+
+    private function startsTaskListItem(ListItem $block): bool
+    {
+        $firstChild = $block->firstChild();
+
+        return $firstChild instanceof Paragraph && $firstChild->firstChild() instanceof TaskListItemMarker;
+    }
+}

app/Entities/Tools/Markdown/CustomParagraphConverter.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace BookStack\Entities\Tools\Markdown;
+
+use League\HTMLToMarkdown\Converter\ParagraphConverter;
+use League\HTMLToMarkdown\ElementInterface;
+
+class CustomParagraphConverter extends ParagraphConverter
+{
+    public function convert(ElementInterface $element): string
+    {
+        $class = $element->getAttribute('class');
+        if (strpos($class, 'callout') !== false) {
+            return "<{$element->getTagName()} class=\"{$class}\">{$element->getValue()}</{$element->getTagName()}>\n\n";
+        }
+
+        return parent::convert($element);
+    }
+}

app/Entities/Tools/Markdown/CustomStrikeThroughExtension.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Tools\Markdown;
+<?php
+
+namespace BookStack\Entities\Tools\Markdown;
 
 use League\CommonMark\ConfigurableEnvironmentInterface;
 use League\CommonMark\Extension\ExtensionInterface;
@@ -7,7 +9,6 @@ use League\CommonMark\Extension\Strikethrough\StrikethroughDelimiterProcessor;
 
 class CustomStrikeThroughExtension implements ExtensionInterface
 {
-
     public function register(ConfigurableEnvironmentInterface $environment)
     {
         $environment->addDelimiterProcessor(new StrikethroughDelimiterProcessor());

app/Entities/Tools/Markdown/CustomStrikethroughRenderer.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Tools\Markdown;
+<?php
+
+namespace BookStack\Entities\Tools\Markdown;
 
 use League\CommonMark\ElementRendererInterface;
 use League\CommonMark\Extension\Strikethrough\Strikethrough;

app/Entities/Tools/Markdown/HtmlToMarkdown.php

@@ -0,0 +1,93 @@
+<?php
+
+namespace BookStack\Entities\Tools\Markdown;
+
+use League\HTMLToMarkdown\Converter\BlockquoteConverter;
+use League\HTMLToMarkdown\Converter\CodeConverter;
+use League\HTMLToMarkdown\Converter\CommentConverter;
+use League\HTMLToMarkdown\Converter\DivConverter;
+use League\HTMLToMarkdown\Converter\EmphasisConverter;
+use League\HTMLToMarkdown\Converter\HardBreakConverter;
+use League\HTMLToMarkdown\Converter\HeaderConverter;
+use League\HTMLToMarkdown\Converter\HorizontalRuleConverter;
+use League\HTMLToMarkdown\Converter\ImageConverter;
+use League\HTMLToMarkdown\Converter\LinkConverter;
+use League\HTMLToMarkdown\Converter\ListBlockConverter;
+use League\HTMLToMarkdown\Converter\ListItemConverter;
+use League\HTMLToMarkdown\Converter\PreformattedConverter;
+use League\HTMLToMarkdown\Converter\TextConverter;
+use League\HTMLToMarkdown\Environment;
+use League\HTMLToMarkdown\HtmlConverter;
+
+class HtmlToMarkdown
+{
+    protected $html;
+
+    public function __construct(string $html)
+    {
+        $this->html = $html;
+    }
+
+    /**
+     * Run the conversion.
+     */
+    public function convert(): string
+    {
+        $converter = new HtmlConverter($this->getConverterEnvironment());
+        $html = $this->prepareHtml($this->html);
+
+        return $converter->convert($html);
+    }
+
+    /**
+     * Run any pre-processing to the HTML to clean it up manually before conversion.
+     */
+    protected function prepareHtml(string $html): string
+    {
+        // Carriage returns can cause whitespace issues in output
+        $html = str_replace("\r\n", "\n", $html);
+        // Attributes on the pre tag can cause issues with conversion
+        return preg_replace('/<pre .*?>/', '<pre>', $html);
+    }
+
+    /**
+     * Get the HTML to Markdown customized environment.
+     * Extends the default provided environment with some BookStack specific tweaks.
+     */
+    protected function getConverterEnvironment(): Environment
+    {
+        $environment = new Environment([
+            'header_style'            => 'atx', // Set to 'atx' to output H1 and H2 headers as # Header1 and ## Header2
+            'suppress_errors'         => true, // Set to false to show warnings when loading malformed HTML
+            'strip_tags'              => false, // Set to true to strip tags that don't have markdown equivalents. N.B. Strips tags, not their content. Useful to clean MS Word HTML output.
+            'strip_placeholder_links' => false, // Set to true to remove <a> that doesn't have href.
+            'bold_style'              => '**', // DEPRECATED: Set to '__' if you prefer the underlined style
+            'italic_style'            => '*', // DEPRECATED: Set to '_' if you prefer the underlined style
+            'remove_nodes'            => '', // space-separated list of dom nodes that should be removed. example: 'meta style script'
+            'hard_break'              => false, // Set to true to turn <br> into `\n` instead of `  \n`
+            'list_item_style'         => '-', // Set the default character for each <li> in a <ul>. Can be '-', '*', or '+'
+            'preserve_comments'       => false, // Set to true to preserve comments, or set to an array of strings to preserve specific comments
+            'use_autolinks'           => false, // Set to true to use simple link syntax if possible. Will always use []() if set to false
+            'table_pipe_escape'       => '\|', // Replacement string for pipe characters inside markdown table cells
+            'table_caption_side'      => 'top', // Set to 'top' or 'bottom' to show <caption> content before or after table, null to suppress
+        ]);
+
+        $environment->addConverter(new BlockquoteConverter());
+        $environment->addConverter(new CodeConverter());
+        $environment->addConverter(new CommentConverter());
+        $environment->addConverter(new DivConverter());
+        $environment->addConverter(new EmphasisConverter());
+        $environment->addConverter(new HardBreakConverter());
+        $environment->addConverter(new HeaderConverter());
+        $environment->addConverter(new HorizontalRuleConverter());
+        $environment->addConverter(new ImageConverter());
+        $environment->addConverter(new LinkConverter());
+        $environment->addConverter(new ListBlockConverter());
+        $environment->addConverter(new ListItemConverter());
+        $environment->addConverter(new CustomParagraphConverter());
+        $environment->addConverter(new PreformattedConverter());
+        $environment->addConverter(new TextConverter());
+
+        return $environment;
+    }
+}

app/Entities/Tools/NextPreviousContentLocator.php

@@ -1,4 +1,6 @@
-<?php namespace BookStack\Entities\Tools;
+<?php
+
+namespace BookStack\Entities\Tools;
 
 use BookStack\Entities\Models\BookChild;
 use BookStack\Entities\Models\Entity;
@@ -48,6 +50,7 @@ class NextPreviousContentLocator
             return get_class($entity) === get_class($this->relativeBookItem)
                 && $entity->id === $this->relativeBookItem->id;
         });
+
         return $index === false ? null : $index;
     }
 
@@ -64,6 +67,7 @@ class NextPreviousContentLocator
             $childPages = $item->visible_pages ?? [];
             $flatOrdered = $flatOrdered->concat($childPages);
         }
+
         return $flatOrdered;
     }
 }