MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / revisiondelete / RevDelRevisionList.php

diff --git a/includes/revisiondelete/RevDelRevisionList.php b/includes/revisiondelete/RevDelRevisionList.php
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+++ b/includes/revisiondelete/RevDelRevisionList.php
@@ -0,0 +1,185 @@
+<?php
+/**
+ * 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
+ * @ingroup RevisionDelete
+ */
+
+use Wikimedia\Rdbms\FakeResultWrapper;
+use Wikimedia\Rdbms\IDatabase;
+
+/**
+ * List for revision table items
+ *
+ * This will check both the 'revision' table for live revisions and the
+ * 'archive' table for traditionally-deleted revisions that have an
+ * ar_rev_id saved.
+ *
+ * See RevDelRevisionItem and RevDelArchivedRevisionItem for items.
+ */
+class RevDelRevisionList extends RevDelList {
+       /** @var int */
+       public $currentRevId;
+
+       public function getType() {
+               return 'revision';
+       }
+
+       public static function getRelationType() {
+               return 'rev_id';
+       }
+
+       public static function getRestriction() {
+               return 'deleterevision';
+       }
+
+       public static function getRevdelConstant() {
+               return Revision::DELETED_TEXT;
+       }
+
+       public static function suggestTarget( $target, array $ids ) {
+               $rev = Revision::newFromId( $ids[0] );
+               return $rev ? $rev->getTitle() : $target;
+       }
+
+       /**
+        * @param IDatabase $db
+        * @return mixed
+        */
+       public function doQuery( $db ) {
+               $ids = array_map( 'intval', $this->ids );
+               $queryInfo = [
+                       'tables' => [ 'revision', 'page', 'user' ],
+                       'fields' => array_merge( Revision::selectFields(), Revision::selectUserFields() ),
+                       'conds' => [
+                               'rev_page' => $this->title->getArticleID(),
+                               'rev_id' => $ids,
+                       ],
+                       'options' => [
+                               'ORDER BY' => 'rev_id DESC',
+                               'USE INDEX' => [ 'revision' => 'PRIMARY' ] // workaround for MySQL bug (T104313)
+                       ],
+                       'join_conds' => [
+                               'page' => Revision::pageJoinCond(),
+                               'user' => Revision::userJoinCond(),
+                       ],
+               ];
+               ChangeTags::modifyDisplayQuery(
+                       $queryInfo['tables'],
+                       $queryInfo['fields'],
+                       $queryInfo['conds'],
+                       $queryInfo['join_conds'],
+                       $queryInfo['options'],
+                       ''
+               );
+
+               $live = $db->select(
+                       $queryInfo['tables'],
+                       $queryInfo['fields'],
+                       $queryInfo['conds'],
+                       __METHOD__,
+                       $queryInfo['options'],
+                       $queryInfo['join_conds']
+               );
+               if ( $live->numRows() >= count( $ids ) ) {
+                       // All requested revisions are live, keeps things simple!
+                       return $live;
+               }
+
+               $archiveQueryInfo = [
+                       'tables' => [ 'archive' ],
+                       'fields' => Revision::selectArchiveFields(),
+                       'conds' => [
+                               'ar_rev_id' => $ids,
+                       ],
+                       'options' => [ 'ORDER BY' => 'ar_rev_id DESC' ],
+                       'join_conds' => [],
+               ];
+
+               ChangeTags::modifyDisplayQuery(
+                       $archiveQueryInfo['tables'],
+                       $archiveQueryInfo['fields'],
+                       $archiveQueryInfo['conds'],
+                       $archiveQueryInfo['join_conds'],
+                       $archiveQueryInfo['options'],
+                       ''
+               );
+
+               // Check if any requested revisions are available fully deleted.
+               $archived = $db->select(
+                       $archiveQueryInfo['tables'],
+                       $archiveQueryInfo['fields'],
+                       $archiveQueryInfo['conds'],
+                       __METHOD__,
+                       $archiveQueryInfo['options'],
+                       $archiveQueryInfo['join_conds']
+               );
+
+               if ( $archived->numRows() == 0 ) {
+                       return $live;
+               } elseif ( $live->numRows() == 0 ) {
+                       return $archived;
+               } else {
+                       // Combine the two! Whee
+                       $rows = [];
+                       foreach ( $live as $row ) {
+                               $rows[$row->rev_id] = $row;
+                       }
+                       foreach ( $archived as $row ) {
+                               $rows[$row->ar_rev_id] = $row;
+                       }
+                       krsort( $rows );
+                       return new FakeResultWrapper( array_values( $rows ) );
+               }
+       }
+
+       public function newItem( $row ) {
+               if ( isset( $row->rev_id ) ) {
+                       return new RevDelRevisionItem( $this, $row );
+               } elseif ( isset( $row->ar_rev_id ) ) {
+                       return new RevDelArchivedRevisionItem( $this, $row );
+               } else {
+                       // This shouldn't happen. :)
+                       throw new MWException( 'Invalid row type in RevDelRevisionList' );
+               }
+       }
+
+       public function getCurrent() {
+               if ( is_null( $this->currentRevId ) ) {
+                       $dbw = wfGetDB( DB_MASTER );
+                       $this->currentRevId = $dbw->selectField(
+                               'page', 'page_latest', $this->title->pageCond(), __METHOD__ );
+               }
+               return $this->currentRevId;
+       }
+
+       public function getSuppressBit() {
+               return Revision::DELETED_RESTRICTED;
+       }
+
+       public function doPreCommitUpdates() {
+               $this->title->invalidateCache();
+               return Status::newGood();
+       }
+
+       public function doPostCommitUpdates( array $visibilityChangeMap ) {
+               $this->title->purgeSquid();
+               // Extensions that require referencing previous revisions may need this
+               Hooks::run( 'ArticleRevisionVisibilitySet', [ $this->title, $this->ids, $visibilityChangeMap ] );
+               return Status::newGood();
+       }
+}