301 lines
9.2 KiB
PHP
301 lines
9.2 KiB
PHP
<?php
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/**
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*
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*
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* Created on July 30, 2007
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*
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* Copyright © 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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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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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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/**
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* @param $resultPageSet ApiPageSet
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* @return void
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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( $params['prop'] );
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// Create search engine instance and set options
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$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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} elseif ( $what == 'nearmatch' ) {
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$matches = SearchEngine::getNearMatchResultSet( $query );
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} else {
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// We default to title searches; this is a terrible legacy
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// of the way we initially set up the MySQL fulltext-based
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// search engine with separate title and text fields.
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// In the future, the default should be for a combined index.
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$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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}
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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() || $result->isMissingRevision() ) {
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continue;
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}
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$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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}
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if ( isset( $prop['size'] ) ) {
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$vals['size'] = $result->getByteSize();
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}
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if ( isset( $prop['wordcount'] ) ) {
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$vals['wordcount'] = $result->getWordCount();
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}
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if ( isset( $prop['timestamp'] ) ) {
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$vals['timestamp'] = wfTimestamp( TS_ISO_8601, $result->getTimestamp() );
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}
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if ( !is_null( $result->getScore() ) && isset( $prop['score'] ) ) {
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$vals['score'] = $result->getScore();
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}
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if ( isset( $prop['titlesnippet'] ) ) {
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$vals['titlesnippet'] = $result->getTitleSnippet( $terms );
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}
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if ( !is_null( $result->getRedirectTitle() ) ) {
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if ( isset( $prop['redirecttitle'] ) ) {
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$vals['redirecttitle'] = $result->getRedirectTitle();
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}
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if ( isset( $prop['redirectsnippet'] ) ) {
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$vals['redirectsnippet'] = $result->getRedirectSnippet( $terms );
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}
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}
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if ( !is_null( $result->getSectionTitle() ) ) {
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if ( isset( $prop['sectiontitle'] ) ) {
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$vals['sectiontitle'] = $result->getSectionTitle();
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}
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if ( isset( $prop['sectionsnippet'] ) ) {
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$vals['sectionsnippet'] = $result->getSectionSnippet();
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}
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}
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if ( isset( $prop['hasrelated'] ) && $result->hasRelated() ) {
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$vals['hasrelated'] = "";
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}
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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 getCacheMode( $params ) {
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return 'public';
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}
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public function getAllowedParams() {
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return array(
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'search' => array(
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ApiBase::PARAM_TYPE => 'string',
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ApiBase::PARAM_REQUIRED => true
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),
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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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'nearmatch',
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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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'score',
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'snippet',
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'titlesnippet',
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'redirecttitle',
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'redirectsnippet',
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'sectiontitle',
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'sectionsnippet',
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'hasrelated',
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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' => array(
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'What properties to return',
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' size - Adds the size of the page in bytes',
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' wordcount - Adds the word count of the page',
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' timestamp - Adds the timestamp of when the page was last edited',
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' score - Adds the score (if any) from the search engine',
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' snippet - Adds a parsed snippet of the page',
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' titlesnippet - Adds a parsed snippet of the page title',
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' redirectsnippet - Adds a parsed snippet of the redirect',
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' redirecttitle - Adds a parsed snippet of the redirect title',
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' sectionsnippet - Adds a parsed snippet of the matching section',
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' sectiontitle - Adds a parsed snippet of the matching section title',
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' hasrelated - Indicates whether a related search is available',
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),
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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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public function getPossibleErrors() {
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return array_merge( parent::getPossibleErrors(), array(
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array( 'code' => 'search-text-disabled', 'info' => 'text search is disabled' ),
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array( 'code' => 'search-title-disabled', 'info' => 'title search is disabled' ),
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) );
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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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