maintenance/updateRestrictions.php

   1 <?php
   2 /**
   3  * Makes the required database updates for Special:ProtectedPages
   4  * to show all protected pages, even ones before the page restrictions
   5  * schema change. All remaining page_restriction column values are moved
   6  * to the new table.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  * @ingroup Maintenance
  25  */
  26
  27 require_once __DIR__ . '/Maintenance.php';
  28
  29 /**
  30  * Maintenance script that updates page_restrictions table from
  31  * old page_restriction column.
  32  *
  33  * @ingroup Maintenance
  34  */
  35 class UpdateRestrictions extends Maintenance {
  36         public function __construct() {
  37                 parent::__construct();
  38                 $this->mDescription = "Updates page_restrictions table from old page_restriction column";
  39                 $this->setBatchSize( 100 );
  40         }
  41
  42         public function execute() {
  43                 $db = wfGetDB( DB_MASTER );
  44                 if ( !$db->tableExists( 'page_restrictions' ) ) {
  45                         $this->error( "page_restrictions table does not exist", true );
  46                 }
  47
  48                 $start = $db->selectField( 'page', 'MIN(page_id)', false, __METHOD__ );
  49                 if ( !$start ) {
  50                         $this->error( "Nothing to do.", true );
  51                 }
  52                 $end = $db->selectField( 'page', 'MAX(page_id)', false, __METHOD__ );
  53
  54                 # Do remaining chunk
  55                 $end += $this->mBatchSize - 1;
  56                 $blockStart = $start;
  57                 $blockEnd = $start + $this->mBatchSize - 1;
  58                 $encodedExpiry = 'infinity';
  59                 while ( $blockEnd <= $end ) {
  60                         $this->output( "...doing page_id from $blockStart to $blockEnd\n" );
  61                         $cond = "page_id BETWEEN $blockStart AND $blockEnd AND page_restrictions !=''";
  62                         $res = $db->select( 'page', array( 'page_id', 'page_namespace', 'page_restrictions' ), $cond, __METHOD__ );
  63                         $batch = array();
  64                         foreach ( $res as $row ) {
  65                                 $oldRestrictions = array();
  66                                 foreach ( explode( ':', trim( $row->page_restrictions ) ) as $restrict ) {
  67                                         $temp = explode( '=', trim( $restrict ) );
  68                                         // Make sure we are not settings restrictions to ""
  69                                         if ( count( $temp ) == 1 && $temp[0] ) {
  70                                                 // old old format should be treated as edit/move restriction
  71                                                 $oldRestrictions["edit"] = trim( $temp[0] );
  72                                                 $oldRestrictions["move"] = trim( $temp[0] );
  73                                         } elseif ( $temp[1] ) {
  74                                                 $oldRestrictions[$temp[0]] = trim( $temp[1] );
  75                                         }
  76                                 }
  77                                 # Clear invalid columns
  78                                 if ( $row->page_namespace == NS_MEDIAWIKI ) {
  79                                         $db->update( 'page', array( 'page_restrictions' => '' ),
  80                                                 array( 'page_id' => $row->page_id ), __FUNCTION__ );
  81                                         $this->output( "...removed dead page_restrictions column for page {$row->page_id}\n" );
  82                                 }
  83                                 # Update restrictions table
  84                                 foreach ( $oldRestrictions as $action => $restrictions ) {
  85                                         $batch[] = array(
  86                                                 'pr_page' => $row->page_id,
  87                                                 'pr_type' => $action,
  88                                                 'pr_level' => $restrictions,
  89                                                 'pr_cascade' => 0,
  90                                                 'pr_expiry' => $encodedExpiry
  91                                         );
  92                                 }
  93                         }
  94                         # We use insert() and not replace() as Article.php replaces
  95                         # page_restrictions with '' when protected in the restrictions table
  96                         if ( count( $batch ) ) {
  97                                 $ok = $db->deadlockLoop( array( $db, 'insert' ), 'page_restrictions',
  98                                         $batch, __FUNCTION__, array( 'IGNORE' ) );
  99                                 if ( !$ok ) {
 100                                         throw new MWException( "Deadlock loop failed wtf :(" );
 101                                 }
 102                         }
 103                         $blockStart += $this->mBatchSize - 1;
 104                         $blockEnd += $this->mBatchSize - 1;
 105                         wfWaitForSlaves();
 106                 }
 107                 $this->output( "...removing dead rows from page_restrictions\n" );
 108                 // Kill any broken rows from previous imports
 109                 $db->delete( 'page_restrictions', array( 'pr_level' => '' ) );
 110                 // Kill other invalid rows
 111                 $db->deleteJoin( 'page_restrictions', 'page', 'pr_page', 'page_id', array( 'page_namespace' => NS_MEDIAWIKI ) );
 112                 $this->output( "...Done!\n" );
 113         }
 114 }
 115
 116 $maintClass = "UpdateRestrictions";
 117 require_once RUN_MAINTENANCE_IF_MAIN;