<?php

/*
 * Created on Jul 3, 2007
 * API for MediaWiki 1.8+
 *
 * Copyright (C) 2007 Roan Kattouw <Firstname>.<Lastname>@home.nl
 *
 * 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.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * http://www.gnu.org/copyleft/gpl.html
 */

if ( !defined( 'MEDIAWIKI' ) ) {
	// Eclipse helper - will be ignored in production
	require_once ( "ApiBase.php" );
}

/**
 * @ingroup API
 */
class ApiUndelete extends ApiBase {

	public function __construct( $main, $action ) {
		parent :: __construct( $main, $action );
	}

	public function execute() {
		global $wgUser;
		$params = $this->extractRequestParams();

		$titleObj = null;
		if ( !isset( $params['title'] ) )
			$this->dieUsageMsg( array( 'missingparam', 'title' ) );

		if ( !$wgUser->isAllowed( 'undelete' ) )
			$this->dieUsageMsg( array( 'permdenied-undelete' ) );

		if ( $wgUser->isBlocked() )
			$this->dieUsageMsg( array( 'blockedtext' ) );

		$titleObj = Title::newFromText( $params['title'] );
		if ( !$titleObj )
			$this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );

		// Convert timestamps
		if ( !isset( $params['timestamps'] ) )
			$params['timestamps'] = array();
		if ( !is_array( $params['timestamps'] ) )
			$params['timestamps'] = array( $params['timestamps'] );
		foreach ( $params['timestamps'] as $i => $ts )
			$params['timestamps'][$i] = wfTimestamp( TS_MW, $ts );

		$pa = new PageArchive( $titleObj );
		$dbw = wfGetDB( DB_MASTER );
		$dbw->begin();
		$retval = $pa->undelete( ( isset( $params['timestamps'] ) ? $params['timestamps'] : array() ), $params['reason'] );
		if ( !is_array( $retval ) )
			$this->dieUsageMsg( array( 'cannotundelete' ) );

		if ( $retval[1] )
			wfRunHooks( 'FileUndeleteComplete',
				array( $titleObj, array(), $wgUser, $params['reason'] ) );

		$info['title'] = $titleObj->getPrefixedText();
		$info['revisions'] = intval( $retval[0] );
		$info['fileversions'] = intval( $retval[1] );
		$info['reason'] = intval( $retval[2] );
		$this->getResult()->addValue( null, $this->getModuleName(), $info );
	}

	public function mustBePosted() {
		return true;
	}

	public function isWriteMode() {
		return true;
	}

	public function getAllowedParams() {
		return array (
			'title' => null,
			'token' => null,
			'reason' => "",
			'timestamps' => array(
				ApiBase :: PARAM_ISMULTI => true
			)
		);
	}

	public function getParamDescription() {
		return array (
			'title' => 'Title of the page you want to restore.',
			'token' => 'An undelete token previously retrieved through list=deletedrevs',
			'reason' => 'Reason for restoring (optional)',
			'timestamps' => 'Timestamps of the revisions to restore. If not set, all revisions will be restored.'
		);
	}

	public function getDescription() {
		return array(
			'Restore certain revisions of a deleted page. A list of deleted revisions (including timestamps) can be',
			'retrieved through list=deletedrevs'
		);
	}
	
	public function getPossibleErrors() {
		return array_merge( parent::getPossibleErrors(), array(
			array( 'missingparam', 'title' ),
			array( 'permdenied-undelete' ),
			array( 'blockedtext' ),
			array( 'invalidtitle', 'title' ),
			array( 'cannotundelete' ),
		) );
	}
	
	public function getTokenSalt() {
		return '';
	}

	protected function getExamples() {
		return array (
			'api.php?action=undelete&title=Main%20Page&token=123ABC&reason=Restoring%20main%20page',
			'api.php?action=undelete&title=Main%20Page&token=123ABC&timestamps=20070703220045|20070702194856'
		);
	}

	public function getVersion() {
		return __CLASS__ . ': $Id: ApiUndelete.php 62599 2010-02-16 21:59:16Z reedy $';
	}
}