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->addDescription( 'Updates page_restrictions table from old page_restriction column' );
  39                 $this->setBatchSize( 1000 );
  40         }
  41
  42         public function execute() {
  43                 $dbw = $this->getDB( DB_PRIMARY );
  44                 $batchSize = $this->getBatchSize();
  45
  46                 if ( !$dbw->tableExists( 'page_restrictions', __METHOD__ ) ) {
  47                         $this->fatalError( "page_restrictions table does not exist" );
  48                 }
  49
  50                 if ( !$dbw->fieldExists( 'page', 'page_restrictions' ) ) {
  51                         $this->output( "Migration is not needed.\n" );
  52                         return true;
  53                 }
  54
  55                 $encodedExpiry = $dbw->getInfinity();
  56
  57                 $maxPageId = $dbw->selectField( 'page', 'MAX(page_id)', '', __METHOD__ );
  58                 $escapedEmptyBlobValue = $dbw->addQuotes( '' );
  59
  60                 $batchMinPageId = 0;
  61
  62                 do {
  63                         $batchMaxPageId = $batchMinPageId + $batchSize;
  64
  65                         $this->output( "...processing page IDs from $batchMinPageId to $batchMaxPageId.\n" );
  66
  67                         $res = $dbw->select(
  68                                 'page',
  69                                 [ 'page_id', 'page_restrictions' ],
  70                                 [
  71                                         "page_restrictions != $escapedEmptyBlobValue",
  72                                         'page_id > ' . $dbw->addQuotes( $batchMinPageId ),
  73                                         'page_id <= ' . $dbw->addQuotes( $batchMaxPageId ),
  74                                 ],
  75                                 __METHOD__
  76                         );
  77
  78                         // No pages have legacy protection settings in the current batch
  79                         if ( !$res->numRows() ) {
  80                                 $batchMinPageId = $batchMaxPageId;
  81                                 continue;
  82                         }
  83
  84                         $batch = [];
  85                         $pageIds = [];
  86
  87                         foreach ( $res as $row ) {
  88                                 $pageIds[] = $row->page_id;
  89
  90                                 $restrictionsByAction = $this->mapLegacyRestrictionBlob( $row->page_restrictions );
  91
  92                                 # Update restrictions table
  93                                 foreach ( $restrictionsByAction as $action => $restrictions ) {
  94                                         $batch[] = [
  95                                                 'pr_page' => $row->page_id,
  96                                                 'pr_type' => $action,
  97                                                 'pr_level' => $restrictions,
  98                                                 'pr_cascade' => 0,
  99                                                 'pr_expiry' => $encodedExpiry
 100                                         ];
 101                                 }
 102                         }
 103
 104                         $this->beginTransaction( $dbw, __METHOD__ );
 105
 106                         // Insert new format protection settings for the pages in the current batch.
 107                         // Use INSERT IGNORE to ignore conflicts with new format settings that might exist for the page
 108                         $dbw->insert(
 109                                 'page_restrictions',
 110                                 $batch,
 111                                 __METHOD__,
 112                                 [ 'IGNORE' ]
 113                         );
 114
 115                         // Clear out the legacy page.page_restrictions blob for this batch
 116                         $dbw->update( 'page', [ 'page_restrictions' => '' ], [ 'page_id' => $pageIds ], __METHOD__ );
 117
 118                         $this->commitTransaction( $dbw, __METHOD__ );
 119
 120                         $batchMinPageId = $batchMaxPageId;
 121                 } while ( $batchMaxPageId < $maxPageId );
 122
 123                 $this->output( "...Done!\n" );
 124                 return true;
 125         }
 126
 127         /**
 128          * Convert a legacy restriction specification from the page.page_restrictions blob to
 129          * a map of action names to restriction levels.
 130          *
 131          * @param string $legacyBlob Legacy page.page_restrictions blob,
 132          * e.g. "sysop" or "edit=sysop:move=autoconfirmed"
 133          * @return string[] array of restriction levels keyed by action names
 134          */
 135         private function mapLegacyRestrictionBlob( $legacyBlob ) {
 136                 $oldRestrictions = [];
 137
 138                 foreach ( explode( ':', trim( $legacyBlob ) ) as $restrict ) {
 139                         $temp = explode( '=', trim( $restrict ) );
 140
 141                         // Treat old old format without action name as edit/move restriction
 142                         if ( count( $temp ) == 1 ) {
 143                                 $level = trim( $temp[0] );
 144
 145                                 $oldRestrictions['edit'] = $level;
 146                                 $oldRestrictions['move'] = $level;
 147                         } else {
 148                                 $restriction = trim( $temp[1] );
 149                                 // Some old entries are empty
 150                                 if ( $restriction != '' ) {
 151                                         $oldRestrictions[$temp[0]] = $restriction;
 152                                 }
 153                         }
 154                 }
 155
 156                 return $oldRestrictions;
 157         }
 158 }
 159
 160 $maintClass = UpdateRestrictions::class;
 161 require_once RUN_MAINTENANCE_IF_MAIN;