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<?php
/*
* Created on July 30, 2007
*
* API for MediaWiki 1.8+
*
* Copyright (C) 2007 Yuri Astrakhan <Firstname><Lastname>@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');
}
/**
* Query module to perform full text search within wiki titles and content
*
* @ingroup API
*/
class ApiQuerySearch extends ApiQueryGeneratorBase {
public function __construct($query, $moduleName) {
parent :: __construct($query, $moduleName, 'sr');
}
public function execute() {
$this->run();
}
public function executeGenerator($resultPageSet) {
$this->run($resultPageSet);
}
private function run($resultPageSet = null) {
$params = $this->extractRequestParams();
$limit = $params['limit'];
$query = $params['search'];
$what = $params['what'];
if (strval($query) === '')
$this->dieUsage("empty search string is not allowed", 'param-search');
$search = SearchEngine::create();
$search->setLimitOffset( $limit+1, $params['offset'] );
$search->setNamespaces( $params['namespace'] );
$search->showRedirects = $params['redirects'];
if ($what == 'text') {
$matches = $search->searchText( $query );
} elseif( $what == 'title' ) {
$matches = $search->searchTitle( $query );
} else {
// We default to title searches; this is a terrible legacy
// of the way we initially set up the MySQL fulltext-based
// search engine with separate title and text fields.
// In the future, the default should be for a combined index.
$what = 'title';
$matches = $search->searchTitle( $query );
// Not all search engines support a separate title search,
// for instance the Lucene-based engine we use on Wikipedia.
// In this case, fall back to full-text search (which will
// include titles in it!)
if( is_null( $matches ) ) {
$what = 'text';
$matches = $search->searchText( $query );
}
}
if (is_null($matches))
$this->dieUsage("{$what} search is disabled",
"search-{$what}-disabled");
$titles = array ();
$count = 0;
while( $result = $matches->next() ) {
if (++ $count > $limit) {
// We've reached the one extra which shows that there are additional items to be had. Stop here...
$this->setContinueEnumParameter('offset', $params['offset'] + $params['limit']);
break;
}
// Silently skip broken and missing titles
if ($result->isBrokenTitle() || $result->isMissingRevision())
continue;
$title = $result->getTitle();
if (is_null($resultPageSet)) {
$vals = array();
ApiQueryBase::addTitleInfo($vals, $title);
$fit = $this->getResult()->addValue(array('query', $this->getModuleName()), null, $vals);
if(!$fit)
{
$this->setContinueEnumParameter('offset', $params['offset'] + $count - 1);
break;
}
} else {
$titles[] = $title;
}
}
if (is_null($resultPageSet)) {
$this->getResult()->setIndexedTagName_internal(array('query', $this->getModuleName()), 'p');
} else {
$resultPageSet->populateFromTitles($titles);
}
}
public function getAllowedParams() {
return array (
'search' => null,
'namespace' => array (
ApiBase :: PARAM_DFLT => 0,
ApiBase :: PARAM_TYPE => 'namespace',
ApiBase :: PARAM_ISMULTI => true,
),
'what' => array (
ApiBase :: PARAM_DFLT => null,
ApiBase :: PARAM_TYPE => array (
'title',
'text',
)
),
'redirects' => false,
'offset' => 0,
'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
)
);
}
public function getParamDescription() {
return array (
'search' => 'Search for all page titles (or content) that has this value.',
'namespace' => 'The namespace(s) to enumerate.',
'what' => 'Search inside the text or titles.',
'redirects' => 'Include redirect pages in the search.',
'offset' => 'Use this value to continue paging (return by query)',
'limit' => 'How many total pages to return.'
);
}
public function getDescription() {
return 'Perform a full text search';
}
protected function getExamples() {
return array (
'api.php?action=query&list=search&srsearch=meaning',
'api.php?action=query&list=search&srwhat=text&srsearch=meaning',
'api.php?action=query&generator=search&gsrsearch=meaning&prop=info',
);
}
public function getVersion() {
return __CLASS__ . ': $Id: ApiQuerySearch.php 47865 2009-02-27 16:03:01Z catrope $';
}
}
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