<?php

/*
 * Created on Sep 25, 2006
 *
 * API for MediaWiki 1.8+
 *
 * Copyright (C) 2006 Yuri Astrakhan <FirstnameLastname@gmail.com>
 *
 * 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');
}

/**
 * @addtogroup API
 */
class ApiQueryAllpages extends ApiQueryGeneratorBase {

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

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

	public function executeGenerator($resultPageSet) {
		if ($resultPageSet->isResolvingRedirects())
			$this->dieUsage('Use "gapfilterredir=nonredirects" option instead of "redirects" when using allpages as a generator', 'params');

		$this->run($resultPageSet);
	}

	private function run($resultPageSet = null) {

		wfProfileIn($this->getModuleProfileName() . '-getDB');
		$db = $this->getDB();
		wfProfileOut($this->getModuleProfileName() . '-getDB');

		wfProfileIn($this->getModuleProfileName() . '-parseParams');
		$limit = $from = $namespace = $filterredir = $prefix = null;
		extract($this->extractRequestParams());

		$this->addTables('page');
		if (!$this->addWhereIf('page_is_redirect = 1', $filterredir === 'redirects'))
			$this->addWhereIf('page_is_redirect = 0', $filterredir === 'nonredirects');
		$this->addWhereFld('page_namespace', $namespace);
		if (isset ($from))
			$this->addWhere('page_title>=' . $db->addQuotes(ApiQueryBase :: titleToKey($from)));
		if (isset ($prefix))
			$this->addWhere("page_title LIKE '{$db->strencode(ApiQueryBase :: titleToKey($prefix))}%'");

		if (is_null($resultPageSet)) {
			$this->addFields(array (
				'page_id',
				'page_namespace',
				'page_title'
			));
		} else {
			$this->addFields($resultPageSet->getPageTableFields());
		}

		$this->addOption('USE INDEX', 'name_title');
		$this->addOption('LIMIT', $limit +1);
		$this->addOption('ORDER BY', 'page_namespace, page_title');

		wfProfileOut($this->getModuleProfileName() . '-parseParams');

		$res = $this->select(__METHOD__);

		wfProfileIn($this->getModuleProfileName() . '-saveResults');

		$data = array ();
		$count = 0;
		while ($row = $db->fetchObject($res)) {
			if (++ $count > $limit) {
				// We've reached the one extra which shows that there are additional pages to be had. Stop here...
				$this->setContinueEnumParameter('from', ApiQueryBase :: keyToTitle($row->page_title));
				break;
			}

			if (is_null($resultPageSet)) {
				$vals = $this->addRowInfo('page', $row);
				if ($vals)
					$data[intval($row->page_id)] = $vals;
			} else {
				$resultPageSet->processDbRow($row);
			}
		}
		$db->freeResult($res);

		if (is_null($resultPageSet)) {
			$result = $this->getResult();
			$result->setIndexedTagName($data, 'p');
			$result->addValue('query', $this->getModuleName(), $data);
		}

		wfProfileOut($this->getModuleProfileName() . '-saveResults');
	}

	protected function getAllowedParams() {
		return array (
			'from' => null,
			'prefix' => null,
			'namespace' => array (
				ApiBase :: PARAM_DFLT => 0,
				ApiBase :: PARAM_TYPE => 'namespace'
			),
			'filterredir' => array (
				ApiBase :: PARAM_DFLT => 'all',
				ApiBase :: PARAM_TYPE => array (
					'all',
					'redirects',
					'nonredirects'
				)
			),
			'limit' => array (
				ApiBase :: PARAM_DFLT => 10,
				ApiBase :: PARAM_TYPE => 'limit',
				ApiBase :: PARAM_MIN => 1,
				ApiBase :: PARAM_MAX1 => ApiBase :: LIMIT_BIG1,
				ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
			)
		);
	}

	protected function getParamDescription() {
		return array (
			'from' => 'The page title to start enumerating from.',
			'prefix' => 'Search for all page titles that begin with this value.',
			'namespace' => 'The namespace to enumerate.',
			'filterredir' => 'Which pages to list.',
			'limit' => 'How many total pages to return.'
		);
	}

	protected function getDescription() {
		return 'Enumerate all pages sequentially in a given namespace';
	}

	protected function getExamples() {
		return array (
			'Simple Use',
			' Show a list of pages starting at the letter "B"',
			'  api.php?action=query&list=allpages&apfrom=B',
			'Using as Generator',
			' Show info about 4 pages starting at the letter "T"',
			'  api.php?action=query&generator=allpages&gaplimit=4&gapfrom=T&prop=info',
			' Show content of first 2 non-redirect pages begining at "Re"',
			'  api.php?action=query&generator=allpages&gaplimit=2&gapfilterredir=nonredirects&gapfrom=Re&prop=revisions&rvprop=content'
		);
	}

	public function getVersion() {
		return __CLASS__ . ': $Id: ApiQueryAllpages.php 21402 2007-04-20 08:55:14Z nickj $';
	}
}
?>