mirror of
https://github.com/YunoHost-Apps/mediawiki_ynh.git
synced 2024-09-03 19:46:05 +02:00
416 lines
13 KiB
PHP
416 lines
13 KiB
PHP
<?php
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/**
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*
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*
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* Created on June 14, 2007
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*
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* Copyright © 2006 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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/**
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* A query module to enumerate pages that belong to a category.
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*
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* @ingroup API
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*/
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class ApiQueryCategoryMembers extends ApiQueryGeneratorBase {
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public function __construct( $query, $moduleName ) {
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parent::__construct( $query, $moduleName, 'cm' );
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}
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public function execute() {
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$this->run();
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}
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public function getCacheMode( $params ) {
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return 'public';
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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( $resultPageSet = null ) {
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$params = $this->extractRequestParams();
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$categoryTitle = $this->getTitleOrPageId( $params )->getTitle();
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if ( $categoryTitle->getNamespace() != NS_CATEGORY ) {
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$this->dieUsage( 'The category name you entered is not valid', 'invalidcategory' );
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}
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$prop = array_flip( $params['prop'] );
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$fld_ids = isset( $prop['ids'] );
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$fld_title = isset( $prop['title'] );
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$fld_sortkey = isset( $prop['sortkey'] );
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$fld_sortkeyprefix = isset( $prop['sortkeyprefix'] );
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$fld_timestamp = isset( $prop['timestamp'] );
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$fld_type = isset( $prop['type'] );
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if ( is_null( $resultPageSet ) ) {
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$this->addFields( array( 'cl_from', 'cl_sortkey', 'cl_type', 'page_namespace', 'page_title' ) );
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$this->addFieldsIf( 'page_id', $fld_ids );
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$this->addFieldsIf( 'cl_sortkey_prefix', $fld_sortkeyprefix );
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} else {
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$this->addFields( $resultPageSet->getPageTableFields() ); // will include page_ id, ns, title
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$this->addFields( array( 'cl_from', 'cl_sortkey', 'cl_type' ) );
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}
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$this->addFieldsIf( 'cl_timestamp', $fld_timestamp || $params['sort'] == 'timestamp' );
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$this->addTables( array( 'page', 'categorylinks' ) ); // must be in this order for 'USE INDEX'
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$this->addWhereFld( 'cl_to', $categoryTitle->getDBkey() );
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$queryTypes = $params['type'];
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$contWhere = false;
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// Scanning large datasets for rare categories sucks, and I already told
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// how to have efficient subcategory access :-) ~~~~ (oh well, domas)
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global $wgMiserMode;
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$miser_ns = array();
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if ( $wgMiserMode ) {
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$miser_ns = $params['namespace'];
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} else {
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$this->addWhereFld( 'page_namespace', $params['namespace'] );
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}
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$dir = in_array( $params['dir'], array( 'asc', 'ascending', 'newer' ) ) ? 'newer' : 'older';
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if ( $params['sort'] == 'timestamp' ) {
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$this->addTimestampWhereRange( 'cl_timestamp',
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$dir,
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$params['start'],
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$params['end'] );
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$this->addOption( 'USE INDEX', 'cl_timestamp' );
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} else {
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if ( $params['continue'] ) {
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$cont = explode( '|', $params['continue'], 3 );
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$this->dieContinueUsageIf( count( $cont ) != 3 );
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// Remove the types to skip from $queryTypes
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$contTypeIndex = array_search( $cont[0], $queryTypes );
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$queryTypes = array_slice( $queryTypes, $contTypeIndex );
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// Add a WHERE clause for sortkey and from
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// pack( "H*", $foo ) is used to convert hex back to binary
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$escSortkey = $this->getDB()->addQuotes( pack( 'H*', $cont[1] ) );
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$from = intval( $cont[2] );
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$op = $dir == 'newer' ? '>' : '<';
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// $contWhere is used further down
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$contWhere = "cl_sortkey $op $escSortkey OR " .
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"(cl_sortkey = $escSortkey AND " .
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"cl_from $op= $from)";
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// The below produces ORDER BY cl_sortkey, cl_from, possibly with DESC added to each of them
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$this->addWhereRange( 'cl_sortkey', $dir, null, null );
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$this->addWhereRange( 'cl_from', $dir, null, null );
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} else {
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$startsortkey = $params['startsortkeyprefix'] !== null ?
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Collation::singleton()->getSortkey( $params['startsortkeyprefix'] ) :
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$params['startsortkey'];
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$endsortkey = $params['endsortkeyprefix'] !== null ?
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Collation::singleton()->getSortkey( $params['endsortkeyprefix'] ) :
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$params['endsortkey'];
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// The below produces ORDER BY cl_sortkey, cl_from, possibly with DESC added to each of them
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$this->addWhereRange( 'cl_sortkey',
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$dir,
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$startsortkey,
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$endsortkey );
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$this->addWhereRange( 'cl_from', $dir, null, null );
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}
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$this->addOption( 'USE INDEX', 'cl_sortkey' );
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}
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$this->addWhere( 'cl_from=page_id' );
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$limit = $params['limit'];
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$this->addOption( 'LIMIT', $limit + 1 );
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if ( $params['sort'] == 'sortkey' ) {
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// Run a separate SELECT query for each value of cl_type.
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// This is needed because cl_type is an enum, and MySQL has
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// inconsistencies between ORDER BY cl_type and
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// WHERE cl_type >= 'foo' making proper paging impossible
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// and unindexed.
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$rows = array();
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$first = true;
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foreach ( $queryTypes as $type ) {
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$extraConds = array( 'cl_type' => $type );
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if ( $first && $contWhere ) {
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// Continuation condition. Only added to the
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// first query, otherwise we'll skip things
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$extraConds[] = $contWhere;
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}
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$res = $this->select( __METHOD__, array( 'where' => $extraConds ) );
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$rows = array_merge( $rows, iterator_to_array( $res ) );
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if ( count( $rows ) >= $limit + 1 ) {
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break;
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}
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$first = false;
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}
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} else {
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// Sorting by timestamp
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// No need to worry about per-type queries because we
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// aren't sorting or filtering by type anyway
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$res = $this->select( __METHOD__ );
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$rows = iterator_to_array( $res );
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}
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$result = $this->getResult();
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$count = 0;
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foreach ( $rows as $row ) {
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if ( ++ $count > $limit ) {
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// We've reached the one extra which shows that there are additional pages to be had. Stop here...
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// TODO: Security issue - if the user has no right to view next title, it will still be shown
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if ( $params['sort'] == 'timestamp' ) {
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$this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->cl_timestamp ) );
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} else {
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$sortkey = bin2hex( $row->cl_sortkey );
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$this->setContinueEnumParameter( 'continue',
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"{$row->cl_type}|$sortkey|{$row->cl_from}"
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);
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}
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break;
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}
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// Since domas won't tell anyone what he told long ago, apply
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// cmnamespace here. This means the query may return 0 actual
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// results, but on the other hand it could save returning 5000
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// useless results to the client. ~~~~
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if ( count( $miser_ns ) && !in_array( $row->page_namespace, $miser_ns ) ) {
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continue;
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}
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if ( is_null( $resultPageSet ) ) {
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$vals = array();
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if ( $fld_ids ) {
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$vals['pageid'] = intval( $row->page_id );
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}
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if ( $fld_title ) {
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$title = Title::makeTitle( $row->page_namespace, $row->page_title );
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ApiQueryBase::addTitleInfo( $vals, $title );
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}
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if ( $fld_sortkey ) {
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$vals['sortkey'] = bin2hex( $row->cl_sortkey );
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}
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if ( $fld_sortkeyprefix ) {
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$vals['sortkeyprefix'] = $row->cl_sortkey_prefix;
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}
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if ( $fld_type ) {
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$vals['type'] = $row->cl_type;
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}
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if ( $fld_timestamp ) {
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$vals['timestamp'] = wfTimestamp( TS_ISO_8601, $row->cl_timestamp );
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}
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$fit = $result->addValue( array( 'query', $this->getModuleName() ),
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null, $vals );
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if ( !$fit ) {
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if ( $params['sort'] == 'timestamp' ) {
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$this->setContinueEnumParameter( 'start', wfTimestamp( TS_ISO_8601, $row->cl_timestamp ) );
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} else {
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$sortkey = bin2hex( $row->cl_sortkey );
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$this->setContinueEnumParameter( 'continue',
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"{$row->cl_type}|$sortkey|{$row->cl_from}"
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);
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}
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break;
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}
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} else {
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$resultPageSet->processDbRow( $row );
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}
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}
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if ( is_null( $resultPageSet ) ) {
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$result->setIndexedTagName_internal(
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array( 'query', $this->getModuleName() ), 'cm' );
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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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'title' => array(
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ApiBase::PARAM_TYPE => 'string',
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),
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'pageid' => array(
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ApiBase::PARAM_TYPE => 'integer'
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),
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'prop' => array(
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ApiBase::PARAM_DFLT => 'ids|title',
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ApiBase::PARAM_ISMULTI => true,
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ApiBase::PARAM_TYPE => array(
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'ids',
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'title',
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'sortkey',
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'sortkeyprefix',
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'type',
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'timestamp',
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)
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),
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'namespace' => array(
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ApiBase::PARAM_ISMULTI => true,
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ApiBase::PARAM_TYPE => 'namespace',
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),
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'type' => array(
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ApiBase::PARAM_ISMULTI => true,
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ApiBase::PARAM_DFLT => 'page|subcat|file',
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ApiBase::PARAM_TYPE => array(
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'page',
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'subcat',
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'file'
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)
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),
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'continue' => null,
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'limit' => array(
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ApiBase::PARAM_TYPE => 'limit',
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ApiBase::PARAM_DFLT => 10,
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ApiBase::PARAM_MIN => 1,
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ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
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ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
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),
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'sort' => array(
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ApiBase::PARAM_DFLT => 'sortkey',
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ApiBase::PARAM_TYPE => array(
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'sortkey',
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'timestamp'
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)
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),
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'dir' => array(
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ApiBase::PARAM_DFLT => 'ascending',
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ApiBase::PARAM_TYPE => array(
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'asc',
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'desc',
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// Normalising with other modules
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'ascending',
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'descending',
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'newer',
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'older',
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)
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),
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'start' => array(
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ApiBase::PARAM_TYPE => 'timestamp'
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),
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'end' => array(
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ApiBase::PARAM_TYPE => 'timestamp'
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),
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'startsortkey' => null,
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'endsortkey' => null,
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'startsortkeyprefix' => null,
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'endsortkeyprefix' => null,
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);
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}
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public function getParamDescription() {
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global $wgMiserMode;
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$p = $this->getModulePrefix();
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$desc = array(
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'title' => "Which category to enumerate (required). Must include Category: prefix. Cannot be used together with {$p}pageid",
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'pageid' => "Page ID of the category to enumerate. Cannot be used together with {$p}title",
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'prop' => array(
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'What pieces of information to include',
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' ids - Adds the page ID',
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' title - Adds the title and namespace ID of the page',
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' sortkey - Adds the sortkey used for sorting in the category (hexadecimal string)',
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' sortkeyprefix - Adds the sortkey prefix used for sorting in the category (human-readable part of the sortkey)',
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' type - Adds the type that the page has been categorised as (page, subcat or file)',
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' timestamp - Adds the timestamp of when the page was included',
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),
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'namespace' => 'Only include pages in these namespaces',
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'type' => "What type of category members to include. Ignored when {$p}sort=timestamp is set",
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'sort' => 'Property to sort by',
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'dir' => 'In which direction to sort',
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'start' => "Timestamp to start listing from. Can only be used with {$p}sort=timestamp",
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'end' => "Timestamp to end listing at. Can only be used with {$p}sort=timestamp",
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'startsortkey' => "Sortkey to start listing from. Must be given in binary format. Can only be used with {$p}sort=sortkey",
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'endsortkey' => "Sortkey to end listing at. Must be given in binary format. Can only be used with {$p}sort=sortkey",
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'startsortkeyprefix' => "Sortkey prefix to start listing from. Can only be used with {$p}sort=sortkey. Overrides {$p}startsortkey",
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'endsortkeyprefix' => "Sortkey prefix to end listing BEFORE (not at, if this value occurs it will not be included!). Can only be used with {$p}sort=sortkey. Overrides {$p}endsortkey",
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'continue' => 'For large categories, give the value returned from previous query',
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'limit' => 'The maximum number of pages to return.',
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);
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if ( $wgMiserMode ) {
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$desc['namespace'] = array(
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$desc['namespace'],
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"NOTE: Due to \$wgMiserMode, using this may result in fewer than \"{$p}limit\" results",
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'returned before continuing; in extreme cases, zero results may be returned.',
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"Note that you can use {$p}type=subcat or {$p}type=file instead of {$p}namespace=14 or 6.",
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);
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}
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return $desc;
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}
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public function getResultProperties() {
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return array(
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'ids' => array(
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'pageid' => 'integer'
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),
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'title' => array(
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'ns' => 'namespace',
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'title' => 'string'
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),
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'sortkey' => array(
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'sortkey' => 'string'
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),
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'sortkeyprefix' => array(
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'sortkeyprefix' => 'string'
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),
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'type' => array(
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'type' => array(
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ApiBase::PROP_TYPE => array(
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'page',
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'subcat',
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'file'
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)
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)
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),
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'timestamp' => array(
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'timestamp' => 'timestamp'
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)
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);
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}
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public function getDescription() {
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return 'List all pages in a given category';
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}
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public function getPossibleErrors() {
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return array_merge( parent::getPossibleErrors(),
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$this->getTitleOrPageIdErrorMessage(),
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array(
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array( 'code' => 'invalidcategory', 'info' => 'The category name you entered is not valid' ),
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)
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);
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}
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public function getExamples() {
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return array(
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'api.php?action=query&list=categorymembers&cmtitle=Category:Physics' => 'Get first 10 pages in [[Category:Physics]]',
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'api.php?action=query&generator=categorymembers&gcmtitle=Category:Physics&prop=info' => 'Get page info about first 10 pages in [[Category:Physics]]',
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);
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}
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public function getHelpUrls() {
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return 'https://www.mediawiki.org/wiki/API:Categorymembers';
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}
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}
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