Method enqueueMessage

/**
 * Enqueue a system message.
 *
 * @param   string  $msg   The message to enqueue.
 * @param   string  $type  The message type. Default is message.
 *
 * @return  void
 *
 * @since   3.2
 */
public function enqueueMessage($msg, $type = self::MSG_INFO)
{
    // Don't add empty messages.
    if ($msg === null || trim($msg) === '') {
        return;
    }
    $inputFilter = InputFilter::getInstance([], [], InputFilter::ONLY_BLOCK_DEFINED_TAGS, InputFilter::ONLY_BLOCK_DEFINED_ATTRIBUTES);
    // Build the message array and apply the HTML InputFilter with the default blacklist to the message
    $message = array('message' => $inputFilter->clean($msg, 'html'), 'type' => $inputFilter->clean(strtolower($type), 'cmd'));
    // For empty queue, if messages exists in the session, enqueue them first.
    $messages = $this->getMessageQueue();
    if (!\in_array($message, $this->messageQueue)) {
        // Enqueue the message.
        $this->messageQueue[] = $message;
    }
}