231 lines
7 KiB
PHP
231 lines
7 KiB
PHP
<?php
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/*
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* Created on July 30, 2007
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*
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* API for MediaWiki 1.8+
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*
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* Copyright (C) 2007 Yuri Astrakhan <Firstname><Lastname>@gmail.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*/
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if (!defined('MEDIAWIKI')) {
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// Eclipse helper - will be ignored in production
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require_once ('ApiQueryBase.php');
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}
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/**
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* Query module to perform full text search within wiki titles and content
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*
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* @ingroup API
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*/
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class ApiQuerySearch extends ApiQueryGeneratorBase {
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public function __construct( $query, $moduleName ) {
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parent :: __construct($query, $moduleName, 'sr');
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}
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public function execute() {
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$this->run();
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}
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public function executeGenerator( $resultPageSet ) {
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$this->run( $resultPageSet );
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}
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private function run( $resultPageSet = null ) {
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global $wgContLang;
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$params = $this->extractRequestParams();
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// Extract parameters
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$limit = $params['limit'];
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$query = $params['search'];
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$what = $params['what'];
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$searchInfo = array_flip( $params['info'] );
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$prop = array_flip( $params['prop'] );
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if ( strval( $query ) === '' )
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$this->dieUsage( "empty search string is not allowed", 'param-search' );
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// Create search engine instance and set options
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$search = SearchEngine::create();
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$search->setLimitOffset( $limit+1, $params['offset'] );
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$search->setNamespaces( $params['namespace'] );
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$search->showRedirects = $params['redirects'];
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// Perform the actual search
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if ( $what == 'text' ) {
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$matches = $search->searchText( $query );
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} elseif( $what == 'title' ) {
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$matches = $search->searchTitle( $query );
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} else {
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// We default to title searches; this is a terrible legacy
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// of the way we initially set up the MySQL fulltext-based
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// search engine with separate title and text fields.
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// In the future, the default should be for a combined index.
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$what = 'title';
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$matches = $search->searchTitle( $query );
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// Not all search engines support a separate title search,
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// for instance the Lucene-based engine we use on Wikipedia.
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// In this case, fall back to full-text search (which will
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// include titles in it!)
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if( is_null( $matches ) ) {
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$what = 'text';
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$matches = $search->searchText( $query );
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}
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}
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if ( is_null( $matches ) )
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$this->dieUsage( "{$what} search is disabled", "search-{$what}-disabled" );
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// Add search meta data to result
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if ( isset( $searchInfo['totalhits'] ) ) {
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$totalhits = $matches->getTotalHits();
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if( $totalhits !== null ) {
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$this->getResult()->addValue( array( 'query', 'searchinfo' ),
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'totalhits', $totalhits );
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}
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}
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if ( isset( $searchInfo['suggestion'] ) && $matches->hasSuggestion() ) {
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$this->getResult()->addValue( array( 'query', 'searchinfo' ),
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'suggestion', $matches->getSuggestionQuery() );
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}
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// Add the search results to the result
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$terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
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$titles = array ();
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$count = 0;
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while ( $result = $matches->next() ) {
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if ( ++ $count > $limit ) {
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// We've reached the one extra which shows that there are additional items to be had. Stop here...
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$this->setContinueEnumParameter( 'offset', $params['offset'] + $params['limit'] );
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break;
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}
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// Silently skip broken and missing titles
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if ( $result->isBrokenTitle() || $result->isMissingRevision() )
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continue;
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$title = $result->getTitle();
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if ( is_null( $resultPageSet ) ) {
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$vals = array();
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ApiQueryBase::addTitleInfo( $vals, $title );
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if ( isset( $prop['snippet'] ) )
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$vals['snippet'] = $result->getTextSnippet( $terms );
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if ( isset( $prop['size'] ) )
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$vals['size'] = $result->getByteSize();
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if ( isset( $prop['wordcount'] ) )
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$vals['wordcount'] = $result->getWordCount();
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if ( isset( $prop['timestamp'] ) )
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$vals['timestamp'] = wfTimestamp( TS_ISO_8601, $result->getTimestamp() );
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// Add item to results and see whether it fits
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$fit = $this->getResult()->addValue( array( 'query', $this->getModuleName() ),
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null, $vals );
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if ( !$fit ) {
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$this->setContinueEnumParameter( 'offset', $params['offset'] + $count - 1 );
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break;
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}
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} else {
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$titles[] = $title;
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}
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}
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if ( is_null( $resultPageSet ) ) {
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$this->getResult()->setIndexedTagName_internal( array(
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'query', $this->getModuleName()
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), 'p' );
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} else {
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$resultPageSet->populateFromTitles( $titles );
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}
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}
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public function getAllowedParams() {
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return array (
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'search' => null,
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'namespace' => array (
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ApiBase :: PARAM_DFLT => 0,
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ApiBase :: PARAM_TYPE => 'namespace',
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ApiBase :: PARAM_ISMULTI => true,
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),
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'what' => array (
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ApiBase :: PARAM_DFLT => null,
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ApiBase :: PARAM_TYPE => array (
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'title',
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'text',
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)
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),
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'info' => array(
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ApiBase :: PARAM_DFLT => 'totalhits|suggestion',
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ApiBase :: PARAM_TYPE => array (
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'totalhits',
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'suggestion',
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),
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ApiBase :: PARAM_ISMULTI => true,
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),
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'prop' => array(
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ApiBase :: PARAM_DFLT => 'size|wordcount|timestamp|snippet',
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ApiBase :: PARAM_TYPE => array (
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'size',
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'wordcount',
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'timestamp',
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'snippet',
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),
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ApiBase :: PARAM_ISMULTI => true,
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),
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'redirects' => false,
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'offset' => 0,
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'limit' => array (
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ApiBase :: PARAM_DFLT => 10,
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ApiBase :: PARAM_TYPE => 'limit',
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ApiBase :: PARAM_MIN => 1,
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ApiBase :: PARAM_MAX => ApiBase :: LIMIT_SML1,
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ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_SML2
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)
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);
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}
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public function getParamDescription() {
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return array (
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'search' => 'Search for all page titles (or content) that has this value.',
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'namespace' => 'The namespace(s) to enumerate.',
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'what' => 'Search inside the text or titles.',
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'info' => 'What metadata to return.',
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'prop' => 'What properties to return.',
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'redirects' => 'Include redirect pages in the search.',
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'offset' => 'Use this value to continue paging (return by query)',
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'limit' => 'How many total pages to return.'
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);
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}
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public function getDescription() {
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return 'Perform a full text search';
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}
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protected function getExamples() {
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return array (
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'api.php?action=query&list=search&srsearch=meaning',
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'api.php?action=query&list=search&srwhat=text&srsearch=meaning',
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'api.php?action=query&generator=search&gsrsearch=meaning&prop=info',
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);
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}
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public function getVersion() {
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return __CLASS__ . ': $Id$';
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}
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}
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