includes/specials/pagers/MergeHistoryPager.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @ingroup Pager
  20  */
  21
  22 /**
  23  * @ingroup Pager
  24  */
  25 class MergeHistoryPager extends ReverseChronologicalPager {
  26
  27         /** @var SpecialMergeHistory */
  28         public $mForm;
  29
  30         /** @var array */
  31         public $mConds;
  32
  33         /** @var int */
  34         private $articleID;
  35
  36         /** @var int */
  37         private $maxTimestamp;
  38
  39         public function __construct( SpecialMergeHistory $form, $conds, Title $source, Title $dest ) {
  40                 $this->mForm = $form;
  41                 $this->mConds = $conds;
  42                 $this->articleID = $source->getArticleID();
  43
  44                 $dbr = wfGetDB( DB_REPLICA );
  45                 $maxtimestamp = $dbr->selectField(
  46                         'revision',
  47                         'MIN(rev_timestamp)',
  48                         [ 'rev_page' => $dest->getArticleID() ],
  49                         __METHOD__
  50                 );
  51                 $this->maxTimestamp = $maxtimestamp;
  52
  53                 parent::__construct( $form->getContext() );
  54         }
  55
  56         protected function getStartBody() {
  57                 # Do a link batch query
  58                 $this->mResult->seek( 0 );
  59                 $batch = new LinkBatch();
  60                 # Give some pointers to make (last) links
  61                 $this->mForm->prevId = [];
  62                 $rev_id = null;
  63                 foreach ( $this->mResult as $row ) {
  64                         $batch->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
  65                         $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
  66
  67                         if ( isset( $rev_id ) ) {
  68                                 if ( $rev_id > $row->rev_id ) {
  69                                         $this->mForm->prevId[$rev_id] = $row->rev_id;
  70                                 } elseif ( $rev_id < $row->rev_id ) {
  71                                         $this->mForm->prevId[$row->rev_id] = $rev_id;
  72                                 }
  73                         }
  74
  75                         $rev_id = $row->rev_id;
  76                 }
  77
  78                 $batch->execute();
  79                 $this->mResult->seek( 0 );
  80
  81                 return '';
  82         }
  83
  84         function formatRow( $row ) {
  85                 return $this->mForm->formatRevisionRow( $row );
  86         }
  87
  88         function getQueryInfo() {
  89                 $conds = $this->mConds;
  90                 $conds['rev_page'] = $this->articleID;
  91                 $conds[] = "rev_timestamp < " . $this->mDb->addQuotes( $this->maxTimestamp );
  92
  93                 $revQuery = Revision::getQueryInfo( [ 'page', 'user' ] );
  94                 return [
  95                         'tables' => $revQuery['tables'],
  96                         'fields' => $revQuery['fields'],
  97                         'conds' => $conds,
  98                         'join_conds' => $revQuery['joins']
  99                 ];
 100         }
 101
 102         function getIndexField() {
 103                 return 'rev_timestamp';
 104         }
 105 }