maintenance/cleanupBlocks.php

   1 <?php
   2 /**
   3  * Cleans up user blocks with user names not matching the 'user' table
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script to clean up user blocks with user names not matching the
  28  * 'user' table.
  29  *
  30  * @ingroup Maintenance
  31  */
  32 class CleanupBlocks extends Maintenance {
  33
  34         public function __construct() {
  35                 parent::__construct();
  36                 $this->addDescription( "Cleanup user blocks with user names not matching the 'user' table" );
  37                 $this->setBatchSize( 1000 );
  38         }
  39
  40         public function execute() {
  41                 $db = $this->getDB( DB_MASTER );
  42
  43                 $max = $db->selectField( 'ipblocks', 'MAX(ipb_user)' );
  44
  45                 // Step 1: Clean up any duplicate user blocks
  46                 for ( $from = 1; $from <= $max; $from += $this->mBatchSize ) {
  47                         $to = min( $max, $from + $this->mBatchSize - 1 );
  48                         $this->output( "Cleaning up duplicate ipb_user ($from-$to of $max)\n" );
  49
  50                         $delete = [];
  51
  52                         $res = $db->select(
  53                                 'ipblocks',
  54                                 [ 'ipb_user' ],
  55                                 [
  56                                         "ipb_user >= $from",
  57                                         "ipb_user <= $to",
  58                                 ],
  59                                 __METHOD__,
  60                                 [
  61                                         'GROUP BY' => 'ipb_user',
  62                                         'HAVING' => 'COUNT(*) > 1',
  63                                 ]
  64                         );
  65                         foreach ( $res as $row ) {
  66                                 $bestBlock = null;
  67                                 $res2 = $db->select(
  68                                         'ipblocks',
  69                                         '*',
  70                                         [
  71                                                 'ipb_user' => $row->ipb_user,
  72                                         ]
  73                                 );
  74                                 foreach ( $res2 as $row2 ) {
  75                                         $block = Block::newFromRow( $row2 );
  76                                         if ( !$bestBlock ) {
  77                                                 $bestBlock = $block;
  78                                                 continue;
  79                                         }
  80
  81                                         // Find the most-restrictive block. Can't use
  82                                         // Block::chooseBlock because that's for IP blocks, not
  83                                         // user blocks.
  84                                         $keep = null;
  85                                         if ( $keep === null && $block->getExpiry() !== $bestBlock->getExpiry() ) {
  86                                                 // This works for infinite blocks because 'infinity' > '20141024234513'
  87                                                 $keep = $block->getExpiry() > $bestBlock->getExpiry();
  88                                         }
  89                                         if ( $keep === null ) {
  90                                                 foreach ( [ 'createaccount', 'sendemail', 'editownusertalk' ] as $action ) {
  91                                                         if ( $block->prevents( $action ) xor $bestBlock->prevents( $action ) ) {
  92                                                                 $keep = $block->prevents( $action );
  93                                                                 break;
  94                                                         }
  95                                                 }
  96                                         }
  97
  98                                         if ( $keep ) {
  99                                                 $delete[] = $bestBlock->getId();
 100                                                 $bestBlock = $block;
 101                                         } else {
 102                                                 $delete[] = $block->getId();
 103                                         }
 104                                 }
 105                         }
 106
 107                         if ( $delete ) {
 108                                 $db->delete(
 109                                         'ipblocks',
 110                                         [ 'ipb_id' => $delete ],
 111                                         __METHOD__
 112                                 );
 113                         }
 114                 }
 115
 116                 // Step 2: Update the user name in any blocks where it doesn't match
 117                 for ( $from = 1; $from <= $max; $from += $this->mBatchSize ) {
 118                         $to = min( $max, $from + $this->mBatchSize - 1 );
 119                         $this->output( "Cleaning up mismatched user name ($from-$to of $max)\n" );
 120
 121                         $res = $db->select(
 122                                 [ 'ipblocks', 'user' ],
 123                                 [ 'ipb_id', 'user_name' ],
 124                                 [
 125                                         'ipb_user = user_id',
 126                                         "ipb_user >= $from",
 127                                         "ipb_user <= $to",
 128                                         'ipb_address != user_name',
 129                                 ],
 130                                 __METHOD__
 131                         );
 132                         foreach ( $res as $row ) {
 133                                 $db->update(
 134                                         'ipblocks',
 135                                         [ 'ipb_address' => $row->user_name ],
 136                                         [ 'ipb_id' => $row->ipb_id ],
 137                                         __METHOD__
 138                                 );
 139                         }
 140                 }
 141
 142                 $this->output( "Done!\n" );
 143         }
 144 }
 145
 146 $maintClass = "CleanupBlocks";
 147 require_once RUN_MAINTENANCE_IF_MAIN;