Add "threadClose" event

src/mibew/libs/classes/Mibew/EventDispatcher/Events.php

@@ -186,6 +186,15 @@ final class Events
      */
     const THREAD_DELETE = 'threadDelete';
 
+    /**
+     * A thread is closed.
+     *
+     * This event is triggered after a thread has been closed. An associative
+     * array with the following items is passed to the event handlers:
+     *  - "thread": an instance of {@link \Mibew\Thread}.
+     */
+    const THREAD_CLOSE = 'threadClose';
+
     /**
      * Threads list is ready to be sent to client.
      *

src/mibew/libs/classes/Mibew/Thread.php

@@ -844,6 +844,8 @@ class Thread
     /**
      * Close thread and send closing messages to the conversation members
      *
+     * Triggers {@link \Mibew\EventDispatcher\Events::THREAD_CLOSE} event.
+     *
      * @param boolean $is_user Boolean TRUE if user initiate thread closing or
      *   boolean FALSE otherwise
      */
@@ -906,6 +908,9 @@ class Thread
             $this->closed = time();
             $this->messageCount = $message_count;
             $this->save();
+
+            $args = array('thread' => $this);
+            EventDispatcher::getInstance()->triggerEvent(Events::THREAD_CLOSE, $args);
         }
     }