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  * @file
   9  * @ingroup Maintenance
  10  */
  11
  12 define( 'BATCH_SIZE', 100 );
  13
  14 require_once 'commandLine.inc';
  15
  16 $db =& wfGetDB( DB_MASTER );
  17 if ( !$db->tableExists( 'page_restrictions' ) ) {
  18         echo "page_restrictions does not exist\n";
  19         exit( 1 );
  20 }
  21
  22 migrate_page_restrictions( $db );
  23
  24 function migrate_page_restrictions( $db ) {
  25         $start = $db->selectField( 'page', 'MIN(page_id)', false, __FUNCTION__ );
  26         if( !$start ) {
  27                 die("Nothing to do.\n");
  28         }
  29         $end = $db->selectField( 'page', 'MAX(page_id)', false, __FUNCTION__ );
  30
  31         # Do remaining chunk
  32         $end += BATCH_SIZE - 1;
  33         $blockStart = $start;
  34         $blockEnd = $start + BATCH_SIZE - 1;
  35         $encodedExpiry = 'infinity';
  36         while( $blockEnd <= $end ) {
  37                 echo "...doing page_id from $blockStart to $blockEnd\n";
  38                 $cond = "page_id BETWEEN $blockStart AND $blockEnd AND page_restrictions !=''";
  39                 $res = $db->select( 'page', array('page_id','page_namespace','page_restrictions'), $cond, __FUNCTION__ );
  40                 $batch = array();
  41                 while( $row = $db->fetchObject( $res ) ) {
  42                         $oldRestrictions = array();
  43                         foreach( explode( ':', trim( $row->page_restrictions ) ) as $restrict ) {
  44                                 $temp = explode( '=', trim( $restrict ) );
  45                                 // Make sure we are not settings restrictions to ""
  46                                 if( count($temp) == 1 && $temp[0] ) {
  47                                         // old old format should be treated as edit/move restriction
  48                                         $oldRestrictions["edit"] = trim( $temp[0] );
  49                                         $oldRestrictions["move"] = trim( $temp[0] );
  50                                 } else if( $temp[1] ) {
  51                                         $oldRestrictions[$temp[0]] = trim( $temp[1] );
  52                                 }
  53                         }
  54                         # Clear invalid columns
  55                         if( $row->page_namespace == NS_MEDIAWIKI ) {
  56                                 $db->update( 'page', array( 'page_restrictions' => '' ),
  57                                         array( 'page_id' => $row->page_id ), __FUNCTION__ );
  58                                 echo "...removed dead page_restrictions column for page {$row->page_id}\n";
  59                         }
  60                         # Update restrictions table
  61                         foreach( $oldRestrictions as $action => $restrictions ) {
  62                                 $batch[] = array(
  63                                         'pr_page' => $row->page_id,
  64                                         'pr_type' => $action,
  65                                         'pr_level' => $restrictions,
  66                                         'pr_cascade' => 0,
  67                                         'pr_expiry' => $encodedExpiry
  68                                 );
  69                         }
  70                 }
  71                 # We use insert() and not replace() as Article.php replaces
  72                 # page_restrictions with '' when protected in the restrictions table
  73                 if ( count( $batch ) ) {
  74                         $ok = $db->deadlockLoop( array( $db, 'insert' ), 'page_restrictions',
  75                                 $batch, __FUNCTION__, array( 'IGNORE' ) );
  76                         if( !$ok ) {
  77                                 throw new MWException( "Deadlock loop failed wtf :(" );
  78                         }
  79                 }
  80                 $blockStart += BATCH_SIZE - 1;
  81                 $blockEnd += BATCH_SIZE - 1;
  82                 wfWaitForSlaves( 5 );
  83         }
  84         echo "...removing dead rows from page_restrictions\n";
  85         // Kill any broken rows from previous imports
  86         $db->delete( 'page_restrictions', array( 'pr_level' => '' ) );
  87         // Kill other invalid rows
  88         $db->deleteJoin( 'page_restrictions', 'page', 'pr_page', 'page_id', array('page_namespace' => NS_MEDIAWIKI) );
  89         echo "...Done!\n";
  90 }
  91
  92