<?php

/*
 * Created on Feb 13, 2009
 *
 * API for MediaWiki 1.8+
 *
 * Copyright (C) 2009 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 ('ApiQueryBase.php');
}

/**
 * Query module to enumerate all create-protected pages.
 *
 * @ingroup API
 */
class ApiQueryProtectedTitles extends ApiQueryGeneratorBase {

	public function __construct($query, $moduleName) {
		parent :: __construct($query, $moduleName, 'pt');
	}

	public function execute() {
		$this->run();
	}

	public function executeGenerator($resultPageSet) {
		$this->run($resultPageSet);
	}

	private function run($resultPageSet = null) {
		$db = $this->getDB();
		$params = $this->extractRequestParams();

		$this->addTables('protected_titles');
		$this->addFields(array('pt_namespace', 'pt_title', 'pt_timestamp'));

		$prop = array_flip($params['prop']);
		$this->addFieldsIf('pt_user', isset($prop['user']));
		$this->addFieldsIf('pt_reason', isset($prop['comment']));
		$this->addFieldsIf('pt_expiry', isset($prop['expiry']));
		$this->addFieldsIf('pt_create_perm', isset($prop['level']));

		$this->addWhereRange('pt_timestamp', $params['dir'], $params['start'], $params['end']);
		$this->addWhereFld('pt_namespace', $params['namespace']);
		$this->addWhereFld('pt_create_perm', $params['level']);
		
		if(isset($prop['user']))
		{
			$this->addTables('user');
			$this->addFields('user_name');
			$this->addJoinConds(array('user' => array('LEFT JOIN',
				'user_id=pt_user'
			)));
		}

		$this->addOption('LIMIT', $params['limit'] + 1);
		$res = $this->select(__METHOD__);

		$count = 0;
		$result = $this->getResult();
		while ($row = $db->fetchObject($res)) {
			if (++ $count > $params['limit']) {
				// We've reached the one extra which shows that there are additional pages to be had. Stop here...
				$this->setContinueEnumParameter('start', wfTimestamp(TS_ISO_8601, $row->pt_timestamp));
				break;
			}

			$title = Title::makeTitle($row->pt_namespace, $row->pt_title);
			if (is_null($resultPageSet)) {
				$vals = array();
				ApiQueryBase::addTitleInfo($vals, $title);
				if(isset($prop['timestamp']))
					$vals['timestamp'] = wfTimestamp(TS_ISO_8601, $row->pt_timestamp);
				if(isset($prop['user']) && !is_null($row->user_name))
					$vals['user'] = $row->user_name;
				if(isset($prop['comment']))
					$vals['comment'] = $row->pt_reason;
				if(isset($prop['expiry']))
					$vals['expiry'] = Block::decodeExpiry($row->pt_expiry, TS_ISO_8601);
				if(isset($prop['level']))
					$vals['level'] = $row->pt_create_perm;
				
				$fit = $result->addValue(array('query', $this->getModuleName()), null, $vals);
				if(!$fit)
				{
					$this->setContinueEnumParameter('start',
						wfTimestamp(TS_ISO_8601, $row->pt_timestamp));
					break;
				}
			} else {
				$titles[] = $title;
			}
		}
		$db->freeResult($res);
		if(is_null($resultPageSet))
			$result->setIndexedTagName_internal(array('query', $this->getModuleName()), $this->getModulePrefix());
		else
			$resultPageSet->populateFromTitles($titles);
	}

	public function getAllowedParams() {
		global $wgRestrictionLevels;
		return array (
			'namespace' => array (
				ApiBase :: PARAM_ISMULTI => true,
				ApiBase :: PARAM_TYPE => 'namespace',
			),
			'level' => array(
				ApiBase :: PARAM_ISMULTI => true,
				ApiBase :: PARAM_TYPE => array_diff($wgRestrictionLevels, array(''))
			),
			'limit' => array (
				ApiBase :: PARAM_DFLT => 10,
				ApiBase :: PARAM_TYPE => 'limit',
				ApiBase :: PARAM_MIN => 1,
				ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
				ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
			),
			'dir' => array (
				ApiBase :: PARAM_DFLT => 'older',
				ApiBase :: PARAM_TYPE => array (
					'older',
					'newer'
				)
			),
			'start' => array(
				ApiBase :: PARAM_TYPE => 'timestamp'
			),
			'end' => array(
				ApiBase :: PARAM_TYPE => 'timestamp'
			),
			'prop' => array(
				ApiBase :: PARAM_ISMULTI => true,
				ApiBase :: PARAM_DFLT => 'timestamp|level',
				ApiBase :: PARAM_TYPE => array(
					'timestamp',
					'user',
					'comment',
					'expiry',
					'level'
				)
			),
		);
	}

	public function getParamDescription() {
		return array (
			'namespace' => 'Only list titles in these namespaces',
			'start' => 'Start listing at this protection timestamp',
			'end' => 'Stop listing at this protection timestamp',
			'dir' => 'The direction in which to list',
			'limit' => 'How many total pages to return.',
			'prop' => 'Which properties to get',
			'level' => 'Only list titles with these protection levels',
		);
	}

	public function getDescription() {
		return 'List all titles protected from creation';
	}

	protected function getExamples() {
		return array (
			'api.php?action=query&list=protectedtitles',
		);
	}

	public function getVersion() {
		return __CLASS__ . ': $Id: ApiQueryProtectedTitles.php 47235 2009-02-13 21:53:08Z catrope $';
	}
}