/**
  * Get the list of new messages for a user
  * @param string $username The username
  * @param int $lastId The id of the last received message
  * @return array the new message list
  */
 public function getNewMessages($username, $lastId = 0)
 {
     $messages = array();
     $userInfo = api_get_user_info_from_username($username);
     $userId = $userInfo['user_id'];
     $lastMessages = MessageManager::getMessagesFromLastReceivedMessage($userId, $lastId);
     foreach ($lastMessages as $message) {
         $hasAttachments = MessageManager::hasAttachments($message['id']);
         $messages[] = array('id' => $message['id'], 'title' => $message['title'], 'sender' => array('id' => $message['user_id'], 'lastname' => $message['lastname'], 'firstname' => $message['firstname'], 'completeName' => api_get_person_name($message['firstname'], $message['lastname'])), 'sendDate' => $message['send_date'], 'content' => $message['content'], 'hasAttachments' => $hasAttachments, 'platform' => array('website' => api_get_path(WEB_PATH), 'messagingTool' => api_get_path(WEB_PATH) . 'main/messages/inbox.php'));
     }
     return $messages;
 }