<?php
/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

/**
 * Show an error page on a badtitle.
 * Similar to ErrorPage, but emit a 400 HTTP error code to let mobile
 * browser it is not really a valid content.
 *
 * @since 1.19
 * @ingroup Exception
 */
class BadTitleError extends ErrorPageError {
	/**
	 * @param string|Message|MalformedTitleException $msg A message key (default: 'badtitletext'), or
	 *     a MalformedTitleException to figure out things from
	 * @param array $params Parameter to wfMessage()
	 */
	public function __construct( $msg = 'badtitletext', $params = array() ) {
		if ( $msg instanceof MalformedTitleException ) {
			$errorMessage = $msg->getErrorMessage();
			if ( !$errorMessage ) {
				parent::__construct( 'badtitle', 'badtitletext', array() );
			} else {
				$errorMessageParams = $msg->getErrorMessageParameters();
				$titleText = $msg->getTitleText();
				if ( $titleText ) {
					$errorMessageParams[] = $titleText;
				}
				parent::__construct( 'badtitle', $errorMessage, $errorMessageParams );
			}
		} else {
			parent::__construct( 'badtitle', $msg, $params );
		}
	}

	/**
	 * Just like ErrorPageError::report() but additionally set
	 * a 400 HTTP status code (bug 33646).
	 */
	public function report() {
		global $wgOut;

		// bug 33646: a badtitle error page need to return an error code
		// to let mobile browser now that it is not a normal page.
		$wgOut->setStatusCode( 400 );
		parent::report();
	}
}