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[autoinstallsdev/mediawiki.git] / includes / api / ApiQueryAllRevisions.php
diff --git a/includes/api/ApiQueryAllRevisions.php b/includes/api/ApiQueryAllRevisions.php
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+<?php
+/**
+ * Created on Sep 27, 2015
+ *
+ * Copyright © 2015 Wikimedia Foundation and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Query module to enumerate all revisions.
+ *
+ * @ingroup API
+ * @since 1.27
+ */
+class ApiQueryAllRevisions extends ApiQueryRevisionsBase {
+
+       public function __construct( ApiQuery $query, $moduleName ) {
+               parent::__construct( $query, $moduleName, 'arv' );
+       }
+
+       /**
+        * @param ApiPageSet $resultPageSet
+        * @return void
+        */
+       protected function run( ApiPageSet $resultPageSet = null ) {
+               $db = $this->getDB();
+               $params = $this->extractRequestParams( false );
+
+               $result = $this->getResult();
+
+               $this->requireMaxOneParameter( $params, 'user', 'excludeuser' );
+
+               // Namespace check is likely to be desired, but can't be done
+               // efficiently in SQL.
+               $miser_ns = null;
+               $needPageTable = false;
+               if ( $params['namespace'] !== null ) {
+                       $params['namespace'] = array_unique( $params['namespace'] );
+                       sort( $params['namespace'] );
+                       if ( $params['namespace'] != MWNamespace::getValidNamespaces() ) {
+                               $needPageTable = true;
+                               if ( $this->getConfig()->get( 'MiserMode' ) ) {
+                                       $miser_ns = $params['namespace'];
+                               } else {
+                                       $this->addWhere( [ 'page_namespace' => $params['namespace'] ] );
+                               }
+                       }
+               }
+
+               $this->addTables( 'revision' );
+               if ( $resultPageSet === null ) {
+                       $this->parseParameters( $params );
+                       $this->addTables( 'page' );
+                       $this->addJoinConds(
+                               [ 'page' => [ 'INNER JOIN', [ 'rev_page = page_id' ] ] ]
+                       );
+                       $this->addFields( Revision::selectFields() );
+                       $this->addFields( Revision::selectPageFields() );
+
+                       // Review this depeneding on the outcome of T113901
+                       $this->addOption( 'STRAIGHT_JOIN' );
+               } else {
+                       $this->limit = $this->getParameter( 'limit' ) ?: 10;
+                       $this->addFields( [ 'rev_timestamp', 'rev_id' ] );
+                       if ( $params['generatetitles'] ) {
+                               $this->addFields( [ 'rev_page' ] );
+                       }
+
+                       if ( $needPageTable ) {
+                               $this->addTables( 'page' );
+                               $this->addJoinConds(
+                                       [ 'page' => [ 'INNER JOIN', [ 'rev_page = page_id' ] ] ]
+                               );
+                               $this->addFieldsIf( [ 'page_namespace' ], (bool)$miser_ns );
+
+                               // Review this depeneding on the outcome of T113901
+                               $this->addOption( 'STRAIGHT_JOIN' );
+                       }
+               }
+
+               $dir = $params['dir'];
+               $this->addTimestampWhereRange( 'rev_timestamp', $dir, $params['start'], $params['end'] );
+
+               if ( $this->fld_tags ) {
+                       $this->addTables( 'tag_summary' );
+                       $this->addJoinConds(
+                               [ 'tag_summary' => [ 'LEFT JOIN', [ 'rev_id=ts_rev_id' ] ] ]
+                       );
+                       $this->addFields( 'ts_tags' );
+               }
+
+               if ( $this->fetchContent ) {
+                       $this->addTables( 'text' );
+                       $this->addJoinConds(
+                               [ 'text' => [ 'INNER JOIN', [ 'rev_text_id=old_id' ] ] ]
+                       );
+                       $this->addFields( 'old_id' );
+                       $this->addFields( Revision::selectTextFields() );
+               }
+
+               if ( $params['user'] !== null ) {
+                       $id = User::idFromName( $params['user'] );
+                       if ( $id ) {
+                               $this->addWhereFld( 'rev_user', $id );
+                       } else {
+                               $this->addWhereFld( 'rev_user_text', $params['user'] );
+                       }
+               } elseif ( $params['excludeuser'] !== null ) {
+                       $id = User::idFromName( $params['excludeuser'] );
+                       if ( $id ) {
+                               $this->addWhere( 'rev_user != ' . $id );
+                       } else {
+                               $this->addWhere( 'rev_user_text != ' . $db->addQuotes( $params['excludeuser'] ) );
+                       }
+               }
+
+               if ( $params['user'] !== null || $params['excludeuser'] !== null ) {
+                       // Paranoia: avoid brute force searches (T19342)
+                       if ( !$this->getUser()->isAllowed( 'deletedhistory' ) ) {
+                               $bitmask = Revision::DELETED_USER;
+                       } elseif ( !$this->getUser()->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
+                               $bitmask = Revision::DELETED_USER | Revision::DELETED_RESTRICTED;
+                       } else {
+                               $bitmask = 0;
+                       }
+                       if ( $bitmask ) {
+                               $this->addWhere( $db->bitAnd( 'rev_deleted', $bitmask ) . " != $bitmask" );
+                       }
+               }
+
+               if ( $params['continue'] !== null ) {
+                       $op = ( $dir == 'newer' ? '>' : '<' );
+                       $cont = explode( '|', $params['continue'] );
+                       $this->dieContinueUsageIf( count( $cont ) != 2 );
+                       $ts = $db->addQuotes( $db->timestamp( $cont[0] ) );
+                       $rev_id = (int)$cont[1];
+                       $this->dieContinueUsageIf( strval( $rev_id ) !== $cont[1] );
+                       $this->addWhere( "rev_timestamp $op $ts OR " .
+                               "(rev_timestamp = $ts AND " .
+                               "rev_id $op= $rev_id)" );
+               }
+
+               $this->addOption( 'LIMIT', $this->limit + 1 );
+
+               $sort = ( $dir == 'newer' ? '' : ' DESC' );
+               $orderby = [];
+               // Targeting index rev_timestamp, user_timestamp, or usertext_timestamp
+               // But 'user' is always constant for the latter two, so it doesn't matter here.
+               $orderby[] = "rev_timestamp $sort";
+               $orderby[] = "rev_id $sort";
+               $this->addOption( 'ORDER BY', $orderby );
+
+               $hookData = [];
+               $res = $this->select( __METHOD__, [], $hookData );
+               $pageMap = []; // Maps rev_page to array index
+               $count = 0;
+               $nextIndex = 0;
+               $generated = [];
+               foreach ( $res as $row ) {
+                       if ( $count === 0 && $resultPageSet !== null ) {
+                               // Set the non-continue since the list of all revisions is
+                               // prone to having entries added at the start frequently.
+                               $this->getContinuationManager()->addGeneratorNonContinueParam(
+                                       $this, 'continue', "$row->rev_timestamp|$row->rev_id"
+                               );
+                       }
+                       if ( ++$count > $this->limit ) {
+                               // We've had enough
+                               $this->setContinueEnumParameter( 'continue', "$row->rev_timestamp|$row->rev_id" );
+                               break;
+                       }
+
+                       // Miser mode namespace check
+                       if ( $miser_ns !== null && !in_array( $row->page_namespace, $miser_ns ) ) {
+                               continue;
+                       }
+
+                       if ( $resultPageSet !== null ) {
+                               if ( $params['generatetitles'] ) {
+                                       $generated[$row->rev_page] = $row->rev_page;
+                               } else {
+                                       $generated[] = $row->rev_id;
+                               }
+                       } else {
+                               $revision = Revision::newFromRow( $row );
+                               $rev = $this->extractRevisionInfo( $revision, $row );
+
+                               if ( !isset( $pageMap[$row->rev_page] ) ) {
+                                       $index = $nextIndex++;
+                                       $pageMap[$row->rev_page] = $index;
+                                       $title = $revision->getTitle();
+                                       $a = [
+                                               'pageid' => $title->getArticleID(),
+                                               'revisions' => [ $rev ],
+                                       ];
+                                       ApiResult::setIndexedTagName( $a['revisions'], 'rev' );
+                                       ApiQueryBase::addTitleInfo( $a, $title );
+                                       $fit = $this->processRow( $row, $a['revisions'][0], $hookData ) &&
+                                               $result->addValue( [ 'query', $this->getModuleName() ], $index, $a );
+                               } else {
+                                       $index = $pageMap[$row->rev_page];
+                                       $fit = $this->processRow( $row, $rev, $hookData ) &&
+                                               $result->addValue( [ 'query', $this->getModuleName(), $index, 'revisions' ], null, $rev );
+                               }
+                               if ( !$fit ) {
+                                       $this->setContinueEnumParameter( 'continue', "$row->rev_timestamp|$row->rev_id" );
+                                       break;
+                               }
+                       }
+               }
+
+               if ( $resultPageSet !== null ) {
+                       if ( $params['generatetitles'] ) {
+                               $resultPageSet->populateFromPageIDs( $generated );
+                       } else {
+                               $resultPageSet->populateFromRevisionIDs( $generated );
+                       }
+               } else {
+                       $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'page' );
+               }
+       }
+
+       public function getAllowedParams() {
+               $ret = parent::getAllowedParams() + [
+                       'user' => [
+                               ApiBase::PARAM_TYPE => 'user',
+                       ],
+                       'namespace' => [
+                               ApiBase::PARAM_ISMULTI => true,
+                               ApiBase::PARAM_TYPE => 'namespace',
+                               ApiBase::PARAM_DFLT => null,
+                       ],
+                       'start' => [
+                               ApiBase::PARAM_TYPE => 'timestamp',
+                       ],
+                       'end' => [
+                               ApiBase::PARAM_TYPE => 'timestamp',
+                       ],
+                       'dir' => [
+                               ApiBase::PARAM_TYPE => [
+                                       'newer',
+                                       'older'
+                               ],
+                               ApiBase::PARAM_DFLT => 'older',
+                               ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
+                       ],
+                       'excludeuser' => [
+                               ApiBase::PARAM_TYPE => 'user',
+                       ],
+                       'continue' => [
+                               ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
+                       ],
+                       'generatetitles' => [
+                               ApiBase::PARAM_DFLT => false,
+                       ],
+               ];
+
+               if ( $this->getConfig()->get( 'MiserMode' ) ) {
+                       $ret['namespace'][ApiBase::PARAM_HELP_MSG_APPEND] = [
+                               'api-help-param-limited-in-miser-mode',
+                       ];
+               }
+
+               return $ret;
+       }
+
+       protected function getExamplesMessages() {
+               return [
+                       'action=query&list=allrevisions&arvuser=Example&arvlimit=50'
+                               => 'apihelp-query+allrevisions-example-user',
+                       'action=query&list=allrevisions&arvdir=newer&arvlimit=50'
+                               => 'apihelp-query+allrevisions-example-ns-main',
+               ];
+       }
+
+       public function getHelpUrls() {
+               return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Allrevisions';
+       }
+}