Use Repositories instead of models

src/Discussion/IdWithTransliteratedSlugDriver.php

@@ -15,6 +15,17 @@ use Flarum\User\User;
 
 class IdWithTransliteratedSlugDriver implements SlugDriverInterface
 {
+
+    /**
+     * @var $discussions DiscussionRepository
+     */
+    protected $discussions;
+
+    public function __construct(DiscussionRepository $discussions)
+    {
+        $this->discussions = $discussions;
+    }
+
     public function toSlug(AbstractModel $instance): string
     {
         return $instance->id.(trim($instance->slug) ? '-'.$instance->slug : '');
@@ -27,6 +38,6 @@ class IdWithTransliteratedSlugDriver implements SlugDriverInterface
             $slug = $slug_array[0];
         }
 
-        return Discussion::where('id', $slug)->whereVisibleTo($actor)->firstOrFail();
+        return $this->discussions->findOrFail($slug, $actor);
     }
 }

src/Http/HttpServiceProvider.php

@@ -51,11 +51,9 @@ class HttpServiceProvider extends AbstractServiceProvider
 
             foreach ($this->app->make('flarum.http.slugDrivers') as $resourceClass => $resourceDrivers) {
                 $driverKey = $settings->get("slug_driver_$resourceClass", 'default');
-                if (array_key_exists($driverKey, $resourceDrivers)) {
+
-                    $driverClass = $resourceDrivers[$driverKey];
+                $driverClass = array_key_exists($driverKey, $resourceDrivers) ? $resourceDrivers[$driverKey] : $resourceDrivers['default'];
-                } else {
+
-                    $driverClass = $resourceDrivers['default'];
-                }
                 $compiledDrivers[$resourceClass] = $this->app->make($driverClass);
             }
 

src/User/UserRepository.php

@@ -40,6 +40,23 @@ class UserRepository
         return $this->scopeVisibleTo($query, $actor)->firstOrFail();
     }
 
+    /**
+     * Find a user by username, optionally making sure it is visible to a certain
+     * user, or throw an exception.
+     *
+     * @param int $id
+     * @param User $actor
+     * @return User
+     *
+     * @throws \Illuminate\Database\Eloquent\ModelNotFoundException
+     */
+    public function findOrFailByUsername($username, User $actor = null)
+    {
+        $query = User::where('id', $username);
+
+        return $this->scopeVisibleTo($query, $actor)->firstOrFail();
+    }
+
     /**
      * Find a user by an identification (username or email).
      *

src/User/UsernameSlugDriver.php

@@ -14,6 +14,17 @@ use Flarum\Http\SlugDriverInterface;
 
 class UsernameSlugDriver implements SlugDriverInterface
 {
+
+    /**
+     * @var $users UserRepository
+     */
+    protected $users;
+
+    public function __construct(UserRepository $users)
+    {
+        $this->users = $users;
+    }
+
     public function toSlug(AbstractModel $instance): string
     {
         return $instance->username;
@@ -21,6 +32,6 @@ class UsernameSlugDriver implements SlugDriverInterface
 
     public function fromSlug(string $slug, User $actor): AbstractModel
     {
-        return User::where('username', $slug)->whereVisibleTo($actor)->firstOrFail();
+        return $this->users->findOrFailByUsername($slug, $actor);
     }
 }