Fixed a lot of responsive problems.

- Fixed auth problem
- Fixed BBCode and Markdown apparition in some unnecessary parts

app/Auth/XenForoGuard.php

@@ -64,6 +64,19 @@ class XenForoGuard implements Guard
         if ($this->hasUser())
             return $this->user;
 
+        $user = $this->getFromSession();
+        if( $user )
+            return $user;
+
+        $user = $this->getFromCookie();
+        if( $user )
+            return $user;
+
+        return null;
+    }
+
+    private function getFromSession(): ?XenForoUser
+    {
         $sessionId = $this->request->cookie('xf_session');
         if(!$sessionId)
             return null;
@@ -92,6 +105,64 @@ class XenForoGuard implements Guard
         return $this->user = new XenForoUser($xfUser);
     }
 
+    private function isCorrectCookieKey(string $key, $record): bool
+    {
+        $known = $record->remember_key;
+        if( !$known )
+            return false;
+
+        $check = hash('sha256', $key, true);
+        return hash_equals($known, $check);
+    }
+
+    private function getFromCookie(): ?XenForoUser
+    {
+        $cookie = $this->request->cookie('xf_user');
+        if(!$cookie)
+            return null;
+
+        $parts = explode(',', $cookie);
+        if( count( $parts ) !== 2 )
+            return null;
+
+        [$userId, $key] = $parts;
+        $userId = (int) $userId;
+
+        if( !$userId || !$key )
+            return null;
+
+        $remembers = \DB::connection('xenforo')
+                        ->table('user_remember')
+                        ->where('user_id', $userId)
+                        ->get();
+
+        if( !$remembers )
+            return null;
+
+        $valid = false;
+
+        foreach( $remembers as $remember )
+        {
+            if( $this->isCorrectCookieKey($key, $remember) && $remember->expiry_date >= time() ){
+                $valid = true;
+                break;
+            }
+        }
+
+        if( !$valid )
+            return null;
+
+        $xfUser = \DB::connection('xenforo')
+            ->table('user')
+            ->where('user_id', $userId)
+            ->first();
+
+        if(!$xfUser)
+            return null;
+
+        return $this->user = new XenForoUser($xfUser);
+    }
+
     /**
      * Unused.
      *