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<?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 );
$revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
$queryInfo = [
'tables' => $revQuery['tables'],
'fields' => $revQuery['fields'],
'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' => $revQuery['joins'],
];
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;
}
$arQuery = Revision::getArchiveQueryInfo();
$archiveQueryInfo = [
'tables' => $arQuery['tables'],
'fields' => $arQuery['fields'],
'conds' => [
'ar_rev_id' => $ids,
],
'options' => [ 'ORDER BY' => 'ar_rev_id DESC' ],
'join_conds' => $arQuery['joins'],
];
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();
}
}
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