Fix #1320 Handle properly displayed events and clear the related counter

app/widgets/Rooms/Rooms.php

@@ -28,6 +28,7 @@ class Rooms extends Base
 
         $this->registerEvent('chatstate', 'onChatState', 'chat');
         $this->registerEvent('message', 'onMessage');
+        $this->registerEvent('displayed', 'onDisplayed', 'chat');
         $this->registerEvent('presence_unavailable_handle', 'onDisconnected', 'chat');
 
         $this->registerEvent('presence_muc_handle', 'onConnected'/*, 'chat'*/);
@@ -70,6 +71,15 @@ class Rooms extends Base
         }
     }
 
+    public function onDisplayed($packet)
+    {
+        $message = $packet->content;
+
+        if ($message->isMuc() && $message->jidto == $this->user->id) {
+            $this->onPresence($message->jidfrom);
+        }
+    }
+
     public function onDestroyed($packet)
     {
         $this->ajaxHttpGet();

src/Moxl/Xec/Payload/Displayed.php

@@ -23,9 +23,15 @@ class Displayed extends Payload
 
         if ($message && $message->displayed == null) {
             $message->displayed = gmdate('Y-m-d H:i:s');
-            $message->seen = true;
             $message->save();
 
+            if ($message->jidto == $message->user_id) {
+                \App\User::me()->messages()
+                    ->where('jidfrom', $message->jidfrom)
+                    ->where('seen', false)
+                    ->update(['seen' => true]);
+            }
+
             $this->pack($message);
             $this->deliver();
         }