FIX: fix file manager

app/Models/FileManager/Directory.php

@@ -3,6 +3,7 @@
 namespace App\Models\FileManager;
 
 use Illuminate\Database\Eloquent\Model;
+use Psy\Exception\ErrorException;
 
 class Directory extends Model
 {
@@ -17,7 +18,16 @@ class Directory extends Model
         'user_id',
         'hidden'
     ];
+    protected $casts = [
+        'hidden'  => 'bool',
+        'is_root' => 'bool'
+    ];
 
+    /**
+     * Files in directory
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function files()
     {
         return $this->hasMany(File::class);
@@ -30,14 +40,7 @@ class Directory extends Model
      */
     public function allSubdirectories()
     {
-        $subdirectories = $this->hasMany(Directory::class, 'parent_id', 'id');
-
-        // todo fix this ugly hack! statement above produces WHERE parent_id IS NOT NULL and parent_id IS NULL when selecting subdirectories from root/none directory
-        if (is_null($this->id)) {
-            $subdirectories = $subdirectories->orWhereNull('parent_id');
-        }
-
-        return $subdirectories;
+        return $this->hasMany(Directory::class, 'parent_id', 'id');
     }
 
     public function subdirectories()
@@ -47,4 +50,14 @@ class Directory extends Model
 
         return $subdirectories;
     }
+
+    public function delete()
+    {
+        // try to prevent from deleting root folder
+        if ($this->is_root == true) {
+            throw new ErrorException('Cannot delete root folder!');
+        }
+
+        return parent::delete();
+    }
 }