f0a6435f3b
The format for 'props' was never specified and the list for 'errors' is impossible to keep updated when considering that many errors come from MediaWiki backend code and extension hook functions. And since there doesn't seem to be any real use case for either of these, let's just kill both of them instead of wasting effort on trying to fix them. Note that neither getResultProperties nor getPossibleErrors are called from any extensions in gerrit, and none of the other deprecated methods are called outside of the implementations of those two methods. Removing the obsolete methods is left to the maintainers of the extensions, as keeping them hurts nothing and is needed to maintain compatibility with earlier versions of MediaWiki. Change-Id: Ie11a401d60c834059fbf1b5625ca8ea093b3337c
558 lines
18 KiB
PHP
558 lines
18 KiB
PHP
<?php
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/**
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*
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*
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* Created on Oct 16, 2006
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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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* This is a three-in-one module to query:
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* * backlinks - links pointing to the given page,
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* * embeddedin - what pages transclude the given page within themselves,
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* * imageusage - what pages use the given image
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*
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* @ingroup API
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*/
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class ApiQueryBacklinks extends ApiQueryGeneratorBase {
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/**
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* @var Title
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*/
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private $rootTitle;
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private $params, $contID, $redirID, $redirect;
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private $bl_ns, $bl_from, $bl_table, $bl_code, $bl_title, $bl_fields, $hasNS;
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/**
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* Maps ns and title to pageid
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*
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* @var array
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*/
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private $pageMap = array();
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private $resultArr;
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private $redirTitles = array();
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private $continueStr = null;
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// output element name, database column field prefix, database table
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private $backlinksSettings = array(
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'backlinks' => array(
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'code' => 'bl',
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'prefix' => 'pl',
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'linktbl' => 'pagelinks',
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'helpurl' => 'https://www.mediawiki.org/wiki/API:Backlinks',
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),
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'embeddedin' => array(
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'code' => 'ei',
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'prefix' => 'tl',
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'linktbl' => 'templatelinks',
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'helpurl' => 'https://www.mediawiki.org/wiki/API:Embeddedin',
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),
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'imageusage' => array(
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'code' => 'iu',
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'prefix' => 'il',
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'linktbl' => 'imagelinks',
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'helpurl' => 'https://www.mediawiki.org/wiki/API:Imageusage',
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)
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);
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public function __construct( ApiQuery $query, $moduleName ) {
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$settings = $this->backlinksSettings[$moduleName];
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$prefix = $settings['prefix'];
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$code = $settings['code'];
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$this->resultArr = array();
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parent::__construct( $query, $moduleName, $code );
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$this->bl_ns = $prefix . '_namespace';
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$this->bl_from = $prefix . '_from';
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$this->bl_table = $settings['linktbl'];
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$this->bl_code = $code;
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$this->helpUrl = $settings['helpurl'];
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$this->hasNS = $moduleName !== 'imageusage';
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if ( $this->hasNS ) {
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$this->bl_title = $prefix . '_title';
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$this->bl_fields = array(
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$this->bl_ns,
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$this->bl_title
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);
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} else {
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$this->bl_title = $prefix . '_to';
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$this->bl_fields = array(
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$this->bl_title
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);
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}
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}
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public function execute() {
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$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 ApiPageSet $resultPageSet
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* @return void
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*/
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private function prepareFirstQuery( $resultPageSet = null ) {
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/* SELECT page_id, page_title, page_namespace, page_is_redirect
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* FROM pagelinks, page WHERE pl_from=page_id
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* AND pl_title='Foo' AND pl_namespace=0
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* LIMIT 11 ORDER BY pl_from
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*/
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$this->addTables( array( $this->bl_table, 'page' ) );
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$this->addWhere( "{$this->bl_from}=page_id" );
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if ( is_null( $resultPageSet ) ) {
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$this->addFields( array( 'page_id', 'page_title', 'page_namespace' ) );
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} else {
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$this->addFields( $resultPageSet->getPageTableFields() );
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}
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$this->addFields( 'page_is_redirect' );
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$this->addWhereFld( $this->bl_title, $this->rootTitle->getDBkey() );
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if ( $this->hasNS ) {
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$this->addWhereFld( $this->bl_ns, $this->rootTitle->getNamespace() );
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}
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$this->addWhereFld( 'page_namespace', $this->params['namespace'] );
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if ( !is_null( $this->contID ) ) {
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$op = $this->params['dir'] == 'descending' ? '<' : '>';
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$this->addWhere( "{$this->bl_from}$op={$this->contID}" );
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}
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if ( $this->params['filterredir'] == 'redirects' ) {
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$this->addWhereFld( 'page_is_redirect', 1 );
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} elseif ( $this->params['filterredir'] == 'nonredirects' && !$this->redirect ) {
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// bug 22245 - Check for !redirect, as filtering nonredirects, when
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// getting what links to them is contradictory
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$this->addWhereFld( 'page_is_redirect', 0 );
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}
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$this->addOption( 'LIMIT', $this->params['limit'] + 1 );
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$sort = ( $this->params['dir'] == 'descending' ? ' DESC' : '' );
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$this->addOption( 'ORDER BY', $this->bl_from . $sort );
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$this->addOption( 'STRAIGHT_JOIN' );
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}
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/**
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* @param ApiPageSet $resultPageSet
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* @return void
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*/
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private function prepareSecondQuery( $resultPageSet = null ) {
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/* SELECT page_id, page_title, page_namespace, page_is_redirect, pl_title, pl_namespace
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FROM pagelinks, page WHERE pl_from=page_id
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AND (pl_title='Foo' AND pl_namespace=0) OR (pl_title='Bar' AND pl_namespace=1)
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ORDER BY pl_namespace, pl_title, pl_from LIMIT 11
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*/
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$db = $this->getDB();
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$this->addTables( array( 'page', $this->bl_table ) );
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$this->addWhere( "{$this->bl_from}=page_id" );
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if ( is_null( $resultPageSet ) ) {
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$this->addFields( array( 'page_id', 'page_title', 'page_namespace', 'page_is_redirect' ) );
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} else {
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$this->addFields( $resultPageSet->getPageTableFields() );
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}
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$this->addFields( $this->bl_title );
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if ( $this->hasNS ) {
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$this->addFields( $this->bl_ns );
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}
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// We can't use LinkBatch here because $this->hasNS may be false
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$titleWhere = array();
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$allRedirNs = array();
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$allRedirDBkey = array();
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/** @var $t Title */
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foreach ( $this->redirTitles as $t ) {
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$redirNs = $t->getNamespace();
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$redirDBkey = $t->getDBkey();
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$titleWhere[] = "{$this->bl_title} = " . $db->addQuotes( $redirDBkey ) .
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( $this->hasNS ? " AND {$this->bl_ns} = {$redirNs}" : '' );
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$allRedirNs[] = $redirNs;
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$allRedirDBkey[] = $redirDBkey;
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}
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$this->addWhere( $db->makeList( $titleWhere, LIST_OR ) );
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$this->addWhereFld( 'page_namespace', $this->params['namespace'] );
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if ( !is_null( $this->redirID ) ) {
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$op = $this->params['dir'] == 'descending' ? '<' : '>';
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/** @var $first Title */
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$first = $this->redirTitles[0];
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$title = $db->addQuotes( $first->getDBkey() );
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$ns = $first->getNamespace();
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$from = $this->redirID;
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if ( $this->hasNS ) {
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$this->addWhere( "{$this->bl_ns} $op $ns OR " .
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"({$this->bl_ns} = $ns AND " .
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"({$this->bl_title} $op $title OR " .
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"({$this->bl_title} = $title AND " .
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"{$this->bl_from} $op= $from)))" );
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} else {
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$this->addWhere( "{$this->bl_title} $op $title OR " .
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"({$this->bl_title} = $title AND " .
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"{$this->bl_from} $op= $from)" );
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}
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}
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if ( $this->params['filterredir'] == 'redirects' ) {
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$this->addWhereFld( 'page_is_redirect', 1 );
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} elseif ( $this->params['filterredir'] == 'nonredirects' ) {
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$this->addWhereFld( 'page_is_redirect', 0 );
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}
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$this->addOption( 'LIMIT', $this->params['limit'] + 1 );
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$orderBy = array();
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$sort = ( $this->params['dir'] == 'descending' ? ' DESC' : '' );
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// Don't order by namespace/title if it's constant in the WHERE clause
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if ( $this->hasNS && count( array_unique( $allRedirNs ) ) != 1 ) {
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$orderBy[] = $this->bl_ns . $sort;
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}
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if ( count( array_unique( $allRedirDBkey ) ) != 1 ) {
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$orderBy[] = $this->bl_title . $sort;
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}
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$orderBy[] = $this->bl_from . $sort;
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$this->addOption( 'ORDER BY', $orderBy );
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$this->addOption( 'USE INDEX', array( 'page' => 'PRIMARY' ) );
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}
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/**
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* @param ApiPageSet $resultPageSet
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* @return void
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*/
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private function run( $resultPageSet = null ) {
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$this->params = $this->extractRequestParams( false );
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$this->redirect = isset( $this->params['redirect'] ) && $this->params['redirect'];
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$userMax = ( $this->redirect ? ApiBase::LIMIT_BIG1 / 2 : ApiBase::LIMIT_BIG1 );
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$botMax = ( $this->redirect ? ApiBase::LIMIT_BIG2 / 2 : ApiBase::LIMIT_BIG2 );
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$result = $this->getResult();
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if ( $this->params['limit'] == 'max' ) {
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$this->params['limit'] = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
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$result->setParsedLimit( $this->getModuleName(), $this->params['limit'] );
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} else {
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$this->params['limit'] = intval( $this->params['limit'] );
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$this->validateLimit( 'limit', $this->params['limit'], 1, $userMax, $botMax );
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}
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$this->processContinue();
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$this->prepareFirstQuery( $resultPageSet );
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$res = $this->select( __METHOD__ . '::firstQuery' );
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$count = 0;
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foreach ( $res as $row ) {
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if ( ++$count > $this->params['limit'] ) {
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// We've reached the one extra which shows that there are
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// additional pages to be had. Stop here...
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// Continue string preserved in case the redirect query doesn't pass the limit
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$this->continueStr = $this->getContinueStr( $row->page_id );
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break;
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}
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if ( is_null( $resultPageSet ) ) {
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$this->extractRowInfo( $row );
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} else {
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$this->pageMap[$row->page_namespace][$row->page_title] = $row->page_id;
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if ( $row->page_is_redirect ) {
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$this->redirTitles[] = Title::makeTitle( $row->page_namespace, $row->page_title );
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}
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$resultPageSet->processDbRow( $row );
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}
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}
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if ( $this->redirect && count( $this->redirTitles ) ) {
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$this->resetQueryParams();
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$this->prepareSecondQuery( $resultPageSet );
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$res = $this->select( __METHOD__ . '::secondQuery' );
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$count = 0;
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foreach ( $res as $row ) {
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if ( ++$count > $this->params['limit'] ) {
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// We've reached the one extra which shows that there are
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// additional pages to be had. Stop here...
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// We need to keep the parent page of this redir in
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if ( $this->hasNS ) {
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$parentID = $this->pageMap[$row->{$this->bl_ns}][$row->{$this->bl_title}];
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} else {
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$parentID = $this->pageMap[NS_FILE][$row->{$this->bl_title}];
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}
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$this->continueStr = $this->getContinueRedirStr( $parentID, $row->page_id );
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break;
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}
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if ( is_null( $resultPageSet ) ) {
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$this->extractRedirRowInfo( $row );
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} else {
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$resultPageSet->processDbRow( $row );
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}
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}
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}
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if ( is_null( $resultPageSet ) ) {
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// Try to add the result data in one go and pray that it fits
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$fit = $result->addValue( 'query', $this->getModuleName(), array_values( $this->resultArr ) );
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if ( !$fit ) {
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// It didn't fit. Add elements one by one until the
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// result is full.
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foreach ( $this->resultArr as $pageID => $arr ) {
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// Add the basic entry without redirlinks first
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$fit = $result->addValue(
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array( 'query', $this->getModuleName() ),
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null, array_diff_key( $arr, array( 'redirlinks' => '' ) ) );
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if ( !$fit ) {
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$this->continueStr = $this->getContinueStr( $pageID );
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break;
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}
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$hasRedirs = false;
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$redirLinks = isset( $arr['redirlinks'] ) ? $arr['redirlinks'] : array();
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foreach ( (array)$redirLinks as $key => $redir ) {
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$fit = $result->addValue(
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array( 'query', $this->getModuleName(), $pageID, 'redirlinks' ),
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$key, $redir );
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if ( !$fit ) {
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$this->continueStr = $this->getContinueRedirStr( $pageID, $redir['pageid'] );
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break;
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}
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$hasRedirs = true;
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}
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if ( $hasRedirs ) {
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$result->setIndexedTagName_internal(
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array( 'query', $this->getModuleName(), $pageID, 'redirlinks' ),
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$this->bl_code );
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}
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if ( !$fit ) {
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break;
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}
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}
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}
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$result->setIndexedTagName_internal(
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array( 'query', $this->getModuleName() ),
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$this->bl_code
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);
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}
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if ( !is_null( $this->continueStr ) ) {
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$this->setContinueEnumParameter( 'continue', $this->continueStr );
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}
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}
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private function extractRowInfo( $row ) {
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$this->pageMap[$row->page_namespace][$row->page_title] = $row->page_id;
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$t = Title::makeTitle( $row->page_namespace, $row->page_title );
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$a = array( 'pageid' => intval( $row->page_id ) );
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ApiQueryBase::addTitleInfo( $a, $t );
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if ( $row->page_is_redirect ) {
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$a['redirect'] = '';
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$this->redirTitles[] = $t;
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}
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// Put all the results in an array first
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$this->resultArr[$a['pageid']] = $a;
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}
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private function extractRedirRowInfo( $row ) {
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$a['pageid'] = intval( $row->page_id );
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ApiQueryBase::addTitleInfo( $a, Title::makeTitle( $row->page_namespace, $row->page_title ) );
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if ( $row->page_is_redirect ) {
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$a['redirect'] = '';
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}
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$ns = $this->hasNS ? $row->{$this->bl_ns} : NS_FILE;
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$parentID = $this->pageMap[$ns][$row->{$this->bl_title}];
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// Put all the results in an array first
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$this->resultArr[$parentID]['redirlinks'][] = $a;
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$this->getResult()->setIndexedTagName(
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$this->resultArr[$parentID]['redirlinks'],
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$this->bl_code
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);
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}
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protected function processContinue() {
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if ( !is_null( $this->params['continue'] ) ) {
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$this->parseContinueParam();
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} else {
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$this->rootTitle = $this->getTitleOrPageId( $this->params )->getTitle();
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}
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// only image titles are allowed for the root in imageinfo mode
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if ( !$this->hasNS && $this->rootTitle->getNamespace() !== NS_FILE ) {
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$this->dieUsage(
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"The title for {$this->getModuleName()} query must be an image",
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'bad_image_title'
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);
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}
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}
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protected function parseContinueParam() {
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$continueList = explode( '|', $this->params['continue'] );
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// expected format:
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// ns | key | id1 [| id2]
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// ns+key: root title
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// id1: first-level page ID to continue from
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// id2: second-level page ID to continue from
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// null stuff out now so we know what's set and what isn't
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$this->rootTitle = $this->contID = $this->redirID = null;
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$rootNs = intval( $continueList[0] );
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$this->dieContinueUsageIf( $rootNs === 0 && $continueList[0] !== '0' );
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$this->rootTitle = Title::makeTitleSafe( $rootNs, $continueList[1] );
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$this->dieContinueUsageIf( !$this->rootTitle );
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$contID = intval( $continueList[2] );
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$this->dieContinueUsageIf( $contID === 0 && $continueList[2] !== '0' );
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$this->contID = $contID;
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$id2 = isset( $continueList[3] ) ? $continueList[3] : null;
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$redirID = intval( $id2 );
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if ( $redirID === 0 && $id2 !== '0' ) {
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// This one isn't required
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return;
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}
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$this->redirID = $redirID;
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}
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protected function getContinueStr( $lastPageID ) {
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return $this->rootTitle->getNamespace() .
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'|' . $this->rootTitle->getDBkey() .
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'|' . $lastPageID;
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}
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protected function getContinueRedirStr( $lastPageID, $lastRedirID ) {
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return $this->getContinueStr( $lastPageID ) . '|' . $lastRedirID;
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}
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public function getAllowedParams() {
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$retval = array(
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'title' => array(
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ApiBase::PARAM_TYPE => 'string',
|
|
),
|
|
'pageid' => array(
|
|
ApiBase::PARAM_TYPE => 'integer',
|
|
),
|
|
'continue' => null,
|
|
'namespace' => array(
|
|
ApiBase::PARAM_ISMULTI => true,
|
|
ApiBase::PARAM_TYPE => 'namespace'
|
|
),
|
|
'dir' => array(
|
|
ApiBase::PARAM_DFLT => 'ascending',
|
|
ApiBase::PARAM_TYPE => array(
|
|
'ascending',
|
|
'descending'
|
|
)
|
|
),
|
|
'filterredir' => array(
|
|
ApiBase::PARAM_DFLT => 'all',
|
|
ApiBase::PARAM_TYPE => array(
|
|
'all',
|
|
'redirects',
|
|
'nonredirects'
|
|
)
|
|
),
|
|
'limit' => array(
|
|
ApiBase::PARAM_DFLT => 10,
|
|
ApiBase::PARAM_TYPE => 'limit',
|
|
ApiBase::PARAM_MIN => 1,
|
|
ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
|
|
ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
|
|
)
|
|
);
|
|
if ( $this->getModuleName() == 'embeddedin' ) {
|
|
return $retval;
|
|
}
|
|
$retval['redirect'] = false;
|
|
|
|
return $retval;
|
|
}
|
|
|
|
public function getParamDescription() {
|
|
$retval = array(
|
|
'title' => "Title to search. Cannot be used together with {$this->bl_code}pageid",
|
|
'pageid' => "Pageid to search. Cannot be used together with {$this->bl_code}title",
|
|
'continue' => 'When more results are available, use this to continue',
|
|
'namespace' => 'The namespace to enumerate',
|
|
'dir' => 'The direction in which to list',
|
|
);
|
|
if ( $this->getModuleName() != 'embeddedin' ) {
|
|
return array_merge( $retval, array(
|
|
'redirect' => 'If linking page is a redirect, find all pages ' .
|
|
'that link to that redirect as well. Maximum limit is halved.',
|
|
'filterredir' => 'How to filter for redirects. If set to ' .
|
|
"nonredirects when {$this->bl_code}redirect is enabled, " .
|
|
'this is only applied to the second level',
|
|
'limit' => 'How many total pages to return. If ' .
|
|
"{$this->bl_code}redirect is enabled, limit applies to each " .
|
|
'level separately (which means you may get up to 2 * limit results).'
|
|
) );
|
|
}
|
|
|
|
return array_merge( $retval, array(
|
|
'filterredir' => 'How to filter for redirects',
|
|
'limit' => 'How many total pages to return'
|
|
) );
|
|
}
|
|
|
|
public function getDescription() {
|
|
switch ( $this->getModuleName() ) {
|
|
case 'backlinks':
|
|
return 'Find all pages that link to the given page.';
|
|
case 'embeddedin':
|
|
return 'Find all pages that embed (transclude) the given title.';
|
|
case 'imageusage':
|
|
return 'Find all pages that use the given image title.';
|
|
default:
|
|
ApiBase::dieDebug( __METHOD__, 'Unknown module name.' );
|
|
}
|
|
}
|
|
|
|
public function getExamples() {
|
|
static $examples = array(
|
|
'backlinks' => array(
|
|
'api.php?action=query&list=backlinks&bltitle=Main%20Page',
|
|
'api.php?action=query&generator=backlinks&gbltitle=Main%20Page&prop=info'
|
|
),
|
|
'embeddedin' => array(
|
|
'api.php?action=query&list=embeddedin&eititle=Template:Stub',
|
|
'api.php?action=query&generator=embeddedin&geititle=Template:Stub&prop=info'
|
|
),
|
|
'imageusage' => array(
|
|
'api.php?action=query&list=imageusage&iutitle=File:Albert%20Einstein%20Head.jpg',
|
|
'api.php?action=query&generator=imageusage&giutitle=File:Albert%20Einstein%20Head.jpg&prop=info'
|
|
)
|
|
);
|
|
|
|
return $examples[$this->getModuleName()];
|
|
}
|
|
|
|
public function getHelpUrls() {
|
|
return $this->helpUrl;
|
|
}
|
|
}
|