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  * @ingroup Maintenance
  24  */
  25
  26 require_once( dirname( __FILE__ ) . '/Maintenance.php' );
  27
  28 class UpdateRestrictions extends Maintenance {
  29         public function __construct() {
  30                 parent::__construct();
  31                 $this->mDescription = "Updates page_restrictions table from old page_restriction column";
  32                 $this->setBatchSize( 100 );
  33         }
  34
  35         public function execute() {
  36                 $db = wfGetDB( DB_MASTER );
  37                 if ( !$db->tableExists( 'page_restrictions' ) ) {
  38                         $this->error( "page_restrictions table does not exist", true );
  39                 }
  40
  41                 $start = $db->selectField( 'page', 'MIN(page_id)', false, __METHOD__ );
  42                 if ( !$start ) {
  43                         $this->error( "Nothing to do.", true );
  44                 }
  45                 $end = $db->selectField( 'page', 'MAX(page_id)', false, __METHOD__ );
  46
  47                 # Do remaining chunk
  48                 $end += $this->mBatchSize - 1;
  49                 $blockStart = $start;
  50                 $blockEnd = $start + $this->mBatchSize - 1;
  51                 $encodedExpiry = 'infinity';
  52                 while ( $blockEnd <= $end ) {
  53                         $this->output( "...doing page_id from $blockStart to $blockEnd\n" );
  54                         $cond = "page_id BETWEEN $blockStart AND $blockEnd AND page_restrictions !=''";
  55                         $res = $db->select( 'page', array( 'page_id', 'page_namespace', 'page_restrictions' ), $cond, __METHOD__ );
  56                         $batch = array();
  57                         foreach ( $res as $row ) {
  58                                 $oldRestrictions = array();
  59                                 foreach ( explode( ':', trim( $row->page_restrictions ) ) as $restrict ) {
  60                                         $temp = explode( '=', trim( $restrict ) );
  61                                         // Make sure we are not settings restrictions to ""
  62                                         if ( count( $temp ) == 1 && $temp[0] ) {
  63                                                 // old old format should be treated as edit/move restriction
  64                                                 $oldRestrictions["edit"] = trim( $temp[0] );
  65                                                 $oldRestrictions["move"] = trim( $temp[0] );
  66                                         } else if ( $temp[1] ) {
  67                                                 $oldRestrictions[$temp[0]] = trim( $temp[1] );
  68                                         }
  69                                 }
  70                                 # Clear invalid columns
  71                                 if ( $row->page_namespace == NS_MEDIAWIKI ) {
  72                                         $db->update( 'page', array( 'page_restrictions' => '' ),
  73                                                 array( 'page_id' => $row->page_id ), __FUNCTION__ );
  74                                         $this->output( "...removed dead page_restrictions column for page {$row->page_id}\n" );
  75                                 }
  76                                 # Update restrictions table
  77                                 foreach ( $oldRestrictions as $action => $restrictions ) {
  78                                         $batch[] = array(
  79                                                 'pr_page' => $row->page_id,
  80                                                 'pr_type' => $action,
  81                                                 'pr_level' => $restrictions,
  82                                                 'pr_cascade' => 0,
  83                                                 'pr_expiry' => $encodedExpiry
  84                                         );
  85                                 }
  86                         }
  87                         # We use insert() and not replace() as Article.php replaces
  88                         # page_restrictions with '' when protected in the restrictions table
  89                         if ( count( $batch ) ) {
  90                                 $ok = $db->deadlockLoop( array( $db, 'insert' ), 'page_restrictions',
  91                                         $batch, __FUNCTION__, array( 'IGNORE' ) );
  92                                 if ( !$ok ) {
  93                                         throw new MWException( "Deadlock loop failed wtf :(" );
  94                                 }
  95                         }
  96                         $blockStart += $this->mBatchSize - 1;
  97                         $blockEnd += $this->mBatchSize - 1;
  98                         wfWaitForSlaves( 5 );
  99                 }
 100                 $this->output( "...removing dead rows from page_restrictions\n" );
 101                 // Kill any broken rows from previous imports
 102                 $db->delete( 'page_restrictions', array( 'pr_level' => '' ) );
 103                 // Kill other invalid rows
 104                 $db->deleteJoin( 'page_restrictions', 'page', 'pr_page', 'page_id', array( 'page_namespace' => NS_MEDIAWIKI ) );
 105                 $this->output( "...Done!\n" );
 106         }
 107 }
 108
 109 $maintClass = "UpdateRestrictions";
 110 require_once( DO_MAINTENANCE );