Add method to get title of an idea

Author: iMattPro

event/listener.php

@@ -230,7 +230,7 @@ public function show_idea($event)
 			'IDEA_STATUS_NAME'	=> $this->ideas->get_status_from_id($idea['idea_status']),
 			'IDEA_STATUS_LINK'	=> $this->helper->route('phpbb_ideas_list_controller', array('status' => $idea['idea_status'])),
 
-			'IDEA_DUPLICATE'	=> $idea['duplicate_id'],
+			'IDEA_DUPLICATE'	=> $idea['duplicate_id'] ? $this->ideas->get_title($idea['duplicate_id']) : '',
 			'IDEA_RFC'			=> $idea['rfc_link'],
 			'IDEA_TICKET'		=> $idea['ticket_id'],
 			'IDEA_IMPLEMENTED'	=> $idea['implemented_version'],

factory/ideas.php

@@ -444,6 +444,25 @@ public function set_title($idea_id, $title)
 		return true;
 	}
 
+	/**
+	 * Get the title of an idea.
+	 *
+	 * @param int $id ID of an idea
+	 *
+	 * @return string The idea's title
+	 */
+	public function get_title($id)
+	{
+		$sql = 'SELECT idea_title
+			FROM ' . $this->table_ideas . '
+			WHERE idea_id = ' . (int) $id;
+		$result = $this->db->sql_query_limit($sql, 1);
+		$idea_title = $this->db->sql_fetchfield('idea_title');
+		$this->db->sql_freeresult($result);
+
+		return $idea_title;
+	}
+
 	/**
 	 * Submits a vote on an idea.
 	 *