578 lines
21 KiB
PHP
578 lines
21 KiB
PHP
<?php
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/*
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* Created on Sep 7, 2006
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*
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* API for MediaWiki 1.8+
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*
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* Copyright (C) 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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* 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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* A query action to enumerate revisions of a given page, or show top revisions of multiple pages.
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* Various pieces of information may be shown - flags, comments, and the actual wiki markup of the rev.
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* In the enumeration mode, ranges of revisions may be requested and filtered.
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*
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* @ingroup API
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*/
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class ApiQueryRevisions extends ApiQueryBase {
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public function __construct( $query, $moduleName ) {
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parent :: __construct( $query, $moduleName, 'rv' );
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}
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private $fld_ids = false, $fld_flags = false, $fld_timestamp = false, $fld_size = false,
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$fld_comment = false, $fld_parsedcomment = false, $fld_user = false, $fld_content = false, $fld_tags = false;
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protected function getTokenFunctions() {
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// tokenname => function
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// function prototype is func($pageid, $title, $rev)
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// should return token or false
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// Don't call the hooks twice
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if ( isset( $this->tokenFunctions ) )
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return $this->tokenFunctions;
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// If we're in JSON callback mode, no tokens can be obtained
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if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) )
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return array();
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$this->tokenFunctions = array(
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'rollback' => array( 'ApiQueryRevisions', 'getRollbackToken' )
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);
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wfRunHooks( 'APIQueryRevisionsTokens', array( &$this->tokenFunctions ) );
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return $this->tokenFunctions;
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}
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public static function getRollbackToken( $pageid, $title, $rev )
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{
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global $wgUser;
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if ( !$wgUser->isAllowed( 'rollback' ) )
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return false;
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return $wgUser->editToken( array( $title->getPrefixedText(),
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$rev->getUserText() ) );
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}
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public function execute() {
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$params = $this->extractRequestParams( false );
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// If any of those parameters are used, work in 'enumeration' mode.
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// Enum mode can only be used when exactly one page is provided.
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// Enumerating revisions on multiple pages make it extremely
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// difficult to manage continuations and require additional SQL indexes
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$enumRevMode = ( !is_null( $params['user'] ) || !is_null( $params['excludeuser'] ) ||
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!is_null( $params['limit'] ) || !is_null( $params['startid'] ) ||
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!is_null( $params['endid'] ) || $params['dir'] === 'newer' ||
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!is_null( $params['start'] ) || !is_null( $params['end'] ) );
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$pageSet = $this->getPageSet();
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$pageCount = $pageSet->getGoodTitleCount();
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$revCount = $pageSet->getRevisionCount();
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// Optimization -- nothing to do
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if ( $revCount === 0 && $pageCount === 0 )
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return;
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if ( $revCount > 0 && $enumRevMode )
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$this->dieUsage( 'The revids= parameter may not be used with the list options (limit, startid, endid, dirNewer, start, end).', 'revids' );
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if ( $pageCount > 1 && $enumRevMode )
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$this->dieUsage( 'titles, pageids or a generator was used to supply multiple pages, but the limit, startid, endid, dirNewer, user, excludeuser, start and end parameters may only be used on a single page.', 'multpages' );
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$this->diffto = $this->difftotext = null;
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if ( !is_null( $params['difftotext'] ) ) {
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$this->difftotext = $params['difftotext'];
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} else if ( !is_null( $params['diffto'] ) ) {
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if ( $params['diffto'] == 'cur' )
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$params['diffto'] = 0;
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if ( ( !ctype_digit( $params['diffto'] ) || $params['diffto'] < 0 )
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&& $params['diffto'] != 'prev' && $params['diffto'] != 'next' )
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$this->dieUsage( 'rvdiffto must be set to a non-negative number, "prev", "next" or "cur"', 'diffto' );
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// Check whether the revision exists and is readable,
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// DifferenceEngine returns a rather ambiguous empty
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// string if that's not the case
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if ( $params['diffto'] != 0 ) {
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$difftoRev = Revision::newFromID( $params['diffto'] );
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if ( !$difftoRev )
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$this->dieUsageMsg( array( 'nosuchrevid', $params['diffto'] ) );
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if ( !$difftoRev->userCan( Revision::DELETED_TEXT ) ) {
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$this->setWarning( "Couldn't diff to r{$difftoRev->getID()}: content is hidden" );
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$params['diffto'] = null;
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}
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}
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$this->diffto = $params['diffto'];
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}
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$db = $this->getDB();
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$this->addTables( array( 'page', 'revision' ) );
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$this->addFields( Revision::selectFields() );
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$this->addWhere( 'page_id = rev_page' );
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$prop = array_flip( $params['prop'] );
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// Optional fields
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$this->fld_ids = isset ( $prop['ids'] );
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// $this->addFieldsIf('rev_text_id', $this->fld_ids); // should this be exposed?
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$this->fld_flags = isset ( $prop['flags'] );
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$this->fld_timestamp = isset ( $prop['timestamp'] );
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$this->fld_comment = isset ( $prop['comment'] );
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$this->fld_parsedcomment = isset ( $prop['parsedcomment'] );
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$this->fld_size = isset ( $prop['size'] );
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$this->fld_user = isset ( $prop['user'] );
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$this->token = $params['token'];
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if ( !is_null( $this->token ) || $pageCount > 0 ) {
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$this->addFields( Revision::selectPageFields() );
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}
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if ( isset ( $prop['tags'] ) ) {
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$this->fld_tags = true;
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$this->addTables( 'tag_summary' );
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$this->addJoinConds( array( 'tag_summary' => array( 'LEFT JOIN', array( 'rev_id=ts_rev_id' ) ) ) );
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$this->addFields( 'ts_tags' );
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}
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if ( !is_null( $params['tag'] ) ) {
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$this->addTables( 'change_tag' );
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$this->addJoinConds( array( 'change_tag' => array( 'INNER JOIN', array( 'rev_id=ct_rev_id' ) ) ) );
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$this->addWhereFld( 'ct_tag' , $params['tag'] );
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}
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if ( isset( $prop['content'] ) || !is_null( $this->difftotext ) ) {
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// For each page we will request, the user must have read rights for that page
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foreach ( $pageSet->getGoodTitles() as $title ) {
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if ( !$title->userCanRead() )
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$this->dieUsage(
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'The current user is not allowed to read ' . $title->getPrefixedText(),
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'accessdenied' );
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}
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$this->addTables( 'text' );
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$this->addWhere( 'rev_text_id=old_id' );
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$this->addFields( 'old_id' );
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$this->addFields( Revision::selectTextFields() );
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$this->fld_content = isset( $prop['content'] );
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$this->expandTemplates = $params['expandtemplates'];
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$this->generateXML = $params['generatexml'];
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if ( isset( $params['section'] ) )
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$this->section = $params['section'];
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else
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$this->section = false;
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}
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$userMax = ( $this->fld_content ? ApiBase::LIMIT_SML1 : ApiBase::LIMIT_BIG1 );
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$botMax = ( $this->fld_content ? ApiBase::LIMIT_SML2 : ApiBase::LIMIT_BIG2 );
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$limit = $params['limit'];
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if ( $limit == 'max' ) {
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$limit = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
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$this->getResult()->addValue( 'limits', $this->getModuleName(), $limit );
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}
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if ( $enumRevMode ) {
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// This is mostly to prevent parameter errors (and optimize SQL?)
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if ( !is_null( $params['startid'] ) && !is_null( $params['start'] ) )
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$this->dieUsage( 'start and startid cannot be used together', 'badparams' );
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if ( !is_null( $params['endid'] ) && !is_null( $params['end'] ) )
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$this->dieUsage( 'end and endid cannot be used together', 'badparams' );
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if ( !is_null( $params['user'] ) && !is_null( $params['excludeuser'] ) )
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$this->dieUsage( 'user and excludeuser cannot be used together', 'badparams' );
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// This code makes an assumption that sorting by rev_id and rev_timestamp produces
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// the same result. This way users may request revisions starting at a given time,
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// but to page through results use the rev_id returned after each page.
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// Switching to rev_id removes the potential problem of having more than
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// one row with the same timestamp for the same page.
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// The order needs to be the same as start parameter to avoid SQL filesort.
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if ( is_null( $params['startid'] ) && is_null( $params['endid'] ) )
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$this->addWhereRange( 'rev_timestamp', $params['dir'],
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$params['start'], $params['end'] );
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else {
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$this->addWhereRange( 'rev_id', $params['dir'],
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$params['startid'], $params['endid'] );
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// One of start and end can be set
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// If neither is set, this does nothing
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$this->addWhereRange( 'rev_timestamp', $params['dir'],
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$params['start'], $params['end'], false );
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}
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// must manually initialize unset limit
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if ( is_null( $limit ) )
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$limit = 10;
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$this->validateLimit( 'limit', $limit, 1, $userMax, $botMax );
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// There is only one ID, use it
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$ids = array_keys( $pageSet->getGoodTitles() );
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$this->addWhereFld( 'rev_page', reset( $ids ) );
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if ( !is_null( $params['user'] ) ) {
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$this->addWhereFld( 'rev_user_text', $params['user'] );
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} elseif ( !is_null( $params['excludeuser'] ) ) {
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$this->addWhere( 'rev_user_text != ' .
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$db->addQuotes( $params['excludeuser'] ) );
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}
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if ( !is_null( $params['user'] ) || !is_null( $params['excludeuser'] ) ) {
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// Paranoia: avoid brute force searches (bug 17342)
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$this->addWhere( $db->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' );
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}
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}
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elseif ( $revCount > 0 ) {
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$max = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
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$revs = $pageSet->getRevisionIDs();
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if ( self::truncateArray( $revs, $max ) )
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$this->setWarning( "Too many values supplied for parameter 'revids': the limit is $max" );
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// Get all revision IDs
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$this->addWhereFld( 'rev_id', array_keys( $revs ) );
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if ( !is_null( $params['continue'] ) )
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$this->addWhere( "rev_id >= '" . intval( $params['continue'] ) . "'" );
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$this->addOption( 'ORDER BY', 'rev_id' );
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// assumption testing -- we should never get more then $revCount rows.
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$limit = $revCount;
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}
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elseif ( $pageCount > 0 ) {
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$max = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
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$titles = $pageSet->getGoodTitles();
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if ( self::truncateArray( $titles, $max ) )
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$this->setWarning( "Too many values supplied for parameter 'titles': the limit is $max" );
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// When working in multi-page non-enumeration mode,
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// limit to the latest revision only
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$this->addWhere( 'page_id=rev_page' );
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$this->addWhere( 'page_latest=rev_id' );
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// Get all page IDs
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$this->addWhereFld( 'page_id', array_keys( $titles ) );
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// Every time someone relies on equality propagation, god kills a kitten :)
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$this->addWhereFld( 'rev_page', array_keys( $titles ) );
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if ( !is_null( $params['continue'] ) )
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{
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$cont = explode( '|', $params['continue'] );
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if ( count( $cont ) != 2 )
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$this->dieUsage( "Invalid continue param. You should pass the original " .
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"value returned by the previous query", "_badcontinue" );
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$pageid = intval( $cont[0] );
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$revid = intval( $cont[1] );
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$this->addWhere( "rev_page > '$pageid' OR " .
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"(rev_page = '$pageid' AND " .
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"rev_id >= '$revid')" );
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}
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$this->addOption( 'ORDER BY', 'rev_page, rev_id' );
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// assumption testing -- we should never get more then $pageCount rows.
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$limit = $pageCount;
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} else
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ApiBase :: dieDebug( __METHOD__, 'param validation?' );
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$this->addOption( 'LIMIT', $limit + 1 );
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$data = array ();
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$count = 0;
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$res = $this->select( __METHOD__ );
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while ( $row = $db->fetchObject( $res ) ) {
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if ( ++ $count > $limit ) {
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// We've reached the one extra which shows that there are additional pages to be had. Stop here...
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if ( !$enumRevMode )
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ApiBase :: dieDebug( __METHOD__, 'Got more rows then expected' ); // bug report
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$this->setContinueEnumParameter( 'startid', intval( $row->rev_id ) );
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break;
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}
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//
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$fit = $this->addPageSubItem( $row->rev_page, $this->extractRowInfo( $row ), 'rev' );
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if ( !$fit )
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{
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if ( $enumRevMode )
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$this->setContinueEnumParameter( 'startid', intval( $row->rev_id ) );
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else if ( $revCount > 0 )
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$this->setContinueEnumParameter( 'continue', intval( $row->rev_id ) );
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else
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$this->setContinueEnumParameter( 'continue', intval( $row->rev_page ) .
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'|' . intval( $row->rev_id ) );
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break;
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}
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}
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$db->freeResult( $res );
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}
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private function extractRowInfo( $row ) {
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$revision = new Revision( $row );
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$title = $revision->getTitle();
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$vals = array ();
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if ( $this->fld_ids ) {
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$vals['revid'] = intval( $revision->getId() );
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// $vals['oldid'] = intval($row->rev_text_id); // todo: should this be exposed?
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if ( !is_null( $revision->getParentId() ) )
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$vals['parentid'] = intval( $revision->getParentId() );
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}
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if ( $this->fld_flags && $revision->isMinor() )
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$vals['minor'] = '';
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if ( $this->fld_user ) {
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if ( $revision->isDeleted( Revision::DELETED_USER ) ) {
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$vals['userhidden'] = '';
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} else {
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$vals['user'] = $revision->getUserText();
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if ( !$revision->getUser() )
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$vals['anon'] = '';
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}
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}
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if ( $this->fld_timestamp ) {
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$vals['timestamp'] = wfTimestamp( TS_ISO_8601, $revision->getTimestamp() );
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}
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if ( $this->fld_size && !is_null( $revision->getSize() ) ) {
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$vals['size'] = intval( $revision->getSize() );
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}
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if ( $this->fld_comment || $this->fld_parsedcomment ) {
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if ( $revision->isDeleted( Revision::DELETED_COMMENT ) ) {
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$vals['commenthidden'] = '';
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} else {
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$comment = $revision->getComment();
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if ( strval( $comment ) !== '' )
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{
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if ( $this->fld_comment )
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$vals['comment'] = $comment;
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if ( $this->fld_parsedcomment ) {
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global $wgUser;
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$vals['parsedcomment'] = $wgUser->getSkin()->formatComment( $comment, $title );
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}
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}
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}
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}
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if ( $this->fld_tags ) {
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if ( $row->ts_tags ) {
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$tags = explode( ',', $row->ts_tags );
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$this->getResult()->setIndexedTagName( $tags, 'tag' );
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$vals['tags'] = $tags;
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} else {
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$vals['tags'] = array();
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}
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}
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if ( !is_null( $this->token ) )
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{
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$tokenFunctions = $this->getTokenFunctions();
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foreach ( $this->token as $t )
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{
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$val = call_user_func( $tokenFunctions[$t], $title->getArticleID(), $title, $revision );
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if ( $val === false )
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$this->setWarning( "Action '$t' is not allowed for the current user" );
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else
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$vals[$t . 'token'] = $val;
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}
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}
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$text = null;
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if ( $this->fld_content || !is_null( $this->difftotext ) ) {
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global $wgParser;
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$text = $revision->getText();
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// Expand templates after getting section content because
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// template-added sections don't count and Parser::preprocess()
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// will have less input
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if ( $this->section !== false ) {
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$text = $wgParser->getSection( $text, $this->section, false );
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if ( $text === false )
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$this->dieUsage( "There is no section {$this->section} in r" . $revision->getId(), 'nosuchsection' );
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}
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}
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if ( $this->fld_content && !$revision->isDeleted( Revision::DELETED_TEXT ) ) {
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if ( $this->generateXML ) {
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$wgParser->startExternalParse( $title, new ParserOptions(), OT_PREPROCESS );
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$dom = $wgParser->preprocessToDom( $text );
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if ( is_callable( array( $dom, 'saveXML' ) ) ) {
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$xml = $dom->saveXML();
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} else {
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$xml = $dom->__toString();
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}
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$vals['parsetree'] = $xml;
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}
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if ( $this->expandTemplates ) {
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$text = $wgParser->preprocess( $text, $title, new ParserOptions() );
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}
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ApiResult :: setContent( $vals, $text );
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} else if ( $this->fld_content ) {
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$vals['texthidden'] = '';
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}
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if ( !is_null( $this->diffto ) || !is_null( $this->difftotext ) ) {
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global $wgAPIMaxUncachedDiffs;
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static $n = 0; // Number of uncached diffs we've had
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|
if ( $n < $wgAPIMaxUncachedDiffs ) {
|
|
$vals['diff'] = array();
|
|
if ( !is_null( $this->difftotext ) ) {
|
|
$engine = new DifferenceEngine( $title );
|
|
$engine->setText( $text, $this->difftotext );
|
|
} else {
|
|
$engine = new DifferenceEngine( $title, $revision->getID(), $this->diffto );
|
|
$vals['diff']['from'] = $engine->getOldid();
|
|
$vals['diff']['to'] = $engine->getNewid();
|
|
}
|
|
$difftext = $engine->getDiffBody();
|
|
ApiResult::setContent( $vals['diff'], $difftext );
|
|
if ( !$engine->wasCacheHit() )
|
|
$n++;
|
|
} else {
|
|
$vals['diff']['notcached'] = '';
|
|
}
|
|
}
|
|
return $vals;
|
|
}
|
|
|
|
public function getAllowedParams() {
|
|
return array (
|
|
'prop' => array (
|
|
ApiBase :: PARAM_ISMULTI => true,
|
|
ApiBase :: PARAM_DFLT => 'ids|timestamp|flags|comment|user',
|
|
ApiBase :: PARAM_TYPE => array (
|
|
'ids',
|
|
'flags',
|
|
'timestamp',
|
|
'user',
|
|
'size',
|
|
'comment',
|
|
'parsedcomment',
|
|
'content',
|
|
'tags'
|
|
)
|
|
),
|
|
'limit' => array (
|
|
ApiBase :: PARAM_TYPE => 'limit',
|
|
ApiBase :: PARAM_MIN => 1,
|
|
ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
|
|
ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
|
|
),
|
|
'startid' => array (
|
|
ApiBase :: PARAM_TYPE => 'integer'
|
|
),
|
|
'endid' => array (
|
|
ApiBase :: PARAM_TYPE => 'integer'
|
|
),
|
|
'start' => array (
|
|
ApiBase :: PARAM_TYPE => 'timestamp'
|
|
),
|
|
'end' => array (
|
|
ApiBase :: PARAM_TYPE => 'timestamp'
|
|
),
|
|
'dir' => array (
|
|
ApiBase :: PARAM_DFLT => 'older',
|
|
ApiBase :: PARAM_TYPE => array (
|
|
'newer',
|
|
'older'
|
|
)
|
|
),
|
|
'user' => array(
|
|
ApiBase :: PARAM_TYPE => 'user'
|
|
),
|
|
'excludeuser' => array(
|
|
ApiBase :: PARAM_TYPE => 'user'
|
|
),
|
|
'tag' => null,
|
|
'expandtemplates' => false,
|
|
'generatexml' => false,
|
|
'section' => null,
|
|
'token' => array(
|
|
ApiBase :: PARAM_TYPE => array_keys( $this->getTokenFunctions() ),
|
|
ApiBase :: PARAM_ISMULTI => true
|
|
),
|
|
'continue' => null,
|
|
'diffto' => null,
|
|
'difftotext' => null,
|
|
);
|
|
}
|
|
|
|
public function getParamDescription() {
|
|
return array (
|
|
'prop' => 'Which properties to get for each revision.',
|
|
'limit' => 'Limit how many revisions will be returned (enum)',
|
|
'startid' => 'From which revision id to start enumeration (enum)',
|
|
'endid' => 'Stop revision enumeration on this revid (enum)',
|
|
'start' => 'From which revision timestamp to start enumeration (enum)',
|
|
'end' => 'Enumerate up to this timestamp (enum)',
|
|
'dir' => 'Direction of enumeration - towards "newer" or "older" revisions (enum)',
|
|
'user' => 'Only include revisions made by user',
|
|
'excludeuser' => 'Exclude revisions made by user',
|
|
'expandtemplates' => 'Expand templates in revision content',
|
|
'generatexml' => 'Generate XML parse tree for revision content',
|
|
'section' => 'Only retrieve the content of this section',
|
|
'token' => 'Which tokens to obtain for each revision',
|
|
'continue' => 'When more results are available, use this to continue',
|
|
'diffto' => array( 'Revision ID to diff each revision to.',
|
|
'Use "prev", "next" and "cur" for the previous, next and current revision respectively.' ),
|
|
'difftotext' => array( 'Text to diff each revision to. Only diffs a limited number of revisions.',
|
|
'Overrides diffto. If rvsection is set, only that section will be diffed against this text.' ),
|
|
'tag' => 'Only list revisions tagged with this tag',
|
|
);
|
|
}
|
|
|
|
public function getDescription() {
|
|
return array (
|
|
'Get revision information.',
|
|
'This module may be used in several ways:',
|
|
' 1) Get data about a set of pages (last revision), by setting titles or pageids parameter.',
|
|
' 2) Get revisions for one given page, by using titles/pageids with start/end/limit params.',
|
|
' 3) Get data about a set of revisions by setting their IDs with revids parameter.',
|
|
'All parameters marked as (enum) may only be used with a single page (#2).'
|
|
);
|
|
}
|
|
|
|
protected function getExamples() {
|
|
return array (
|
|
'Get data with content for the last revision of titles "API" and "Main Page":',
|
|
' api.php?action=query&prop=revisions&titles=API|Main%20Page&rvprop=timestamp|user|comment|content',
|
|
'Get last 5 revisions of the "Main Page":',
|
|
' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment',
|
|
'Get first 5 revisions of the "Main Page":',
|
|
' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvdir=newer',
|
|
'Get first 5 revisions of the "Main Page" made after 2006-05-01:',
|
|
' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvdir=newer&rvstart=20060501000000',
|
|
'Get first 5 revisions of the "Main Page" that were not made made by anonymous user "127.0.0.1"',
|
|
' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvexcludeuser=127.0.0.1',
|
|
'Get first 5 revisions of the "Main Page" that were made by the user "MediaWiki default"',
|
|
' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvuser=MediaWiki%20default',
|
|
);
|
|
}
|
|
|
|
public function getVersion() {
|
|
return __CLASS__ . ': $Id$';
|
|
}
|
|
}
|