Create "threadDelete" event

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

@@ -177,6 +177,15 @@ final class Events
      */
     const THREAD_UPDATE = 'threadUpdate';
 
+    /**
+     * A thread is deleted.
+     *
+     * This event is triggered after a thread has been deleted. An associative
+     * array with the following items is passed to the event handlers:
+     *  - "id": int, deleted thread ID.
+     */
+    const THREAD_DELETE = 'threadDelete';
+
     /**
      * Threads list is ready to be sent to client.
      *

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

@@ -532,6 +532,8 @@ class Thread
 
     /**
      * Remove thread from database
+     *
+     * Triggers {@link \Mibew\EventDispatcher\Events::THREAD_DELETE} event.
      */
     public function delete()
     {
@@ -540,6 +542,9 @@ class Thread
             "DELETE FROM {thread} WHERE threadid = :id LIMIT 1",
             array(':id' => $this->id)
         );
+
+        $args = array('id' => $this->id);
+        EventDispatcher::getInstance()->triggerEvent(Events::THREAD_DELETE, $args);
     }
 
     /**