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         function __construct( SpecialMergeHistory $form, $conds, Title $source, Title $dest ) {
  34                 $this->mForm = $form;
  35                 $this->mConds = $conds;
  36                 $this->title = $source;
  37                 $this->articleID = $source->getArticleID();
  38
  39                 $dbr = wfGetDB( DB_REPLICA );
  40                 $maxtimestamp = $dbr->selectField(
  41                         'revision',
  42                         'MIN(rev_timestamp)',
  43                         [ 'rev_page' => $dest->getArticleID() ],
  44                         __METHOD__
  45                 );
  46                 $this->maxTimestamp = $maxtimestamp;
  47
  48                 parent::__construct( $form->getContext() );
  49         }
  50
  51         function getStartBody() {
  52                 # Do a link batch query
  53                 $this->mResult->seek( 0 );
  54                 $batch = new LinkBatch();
  55                 # Give some pointers to make (last) links
  56                 $this->mForm->prevId = [];
  57                 $rev_id = null;
  58                 foreach ( $this->mResult as $row ) {
  59                         $batch->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
  60                         $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
  61
  62                         if ( isset( $rev_id ) ) {
  63                                 if ( $rev_id > $row->rev_id ) {
  64                                         $this->mForm->prevId[$rev_id] = $row->rev_id;
  65                                 } elseif ( $rev_id < $row->rev_id ) {
  66                                         $this->mForm->prevId[$row->rev_id] = $rev_id;
  67                                 }
  68                         }
  69
  70                         $rev_id = $row->rev_id;
  71                 }
  72
  73                 $batch->execute();
  74                 $this->mResult->seek( 0 );
  75
  76                 return '';
  77         }
  78
  79         function formatRow( $row ) {
  80                 return $this->mForm->formatRevisionRow( $row );
  81         }
  82
  83         function getQueryInfo() {
  84                 $conds = $this->mConds;
  85                 $conds['rev_page'] = $this->articleID;
  86                 $conds[] = "rev_timestamp < " . $this->mDb->addQuotes( $this->maxTimestamp );
  87
  88                 return [
  89                         'tables' => [ 'revision', 'page', 'user' ],
  90                         'fields' => array_merge( Revision::selectFields(), Revision::selectUserFields() ),
  91                         'conds' => $conds,
  92                         'join_conds' => [
  93                                 'page' => Revision::pageJoinCond(),
  94                                 'user' => Revision::userJoinCond() ]
  95                 ];
  96         }
  97
  98         function getIndexField() {
  99                 return 'rev_timestamp';
 100         }
 101 }