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                 $blockQuery = Block::getQueryInfo();
  43
  44                 $max = $db->selectField( 'ipblocks', 'MAX(ipb_user)' );
  45
  46                 // Step 1: Clean up any duplicate user blocks
  47                 for ( $from = 1; $from <= $max; $from += $this->mBatchSize ) {
  48                         $to = min( $max, $from + $this->mBatchSize - 1 );
  49                         $this->output( "Cleaning up duplicate ipb_user ($from-$to of $max)\n" );
  50
  51                         $delete = [];
  52
  53                         $res = $db->select(
  54                                 'ipblocks',
  55                                 [ 'ipb_user' ],
  56                                 [
  57                                         "ipb_user >= $from",
  58                                         "ipb_user <= $to",
  59                                 ],
  60                                 __METHOD__,
  61                                 [
  62                                         'GROUP BY' => 'ipb_user',
  63                                         'HAVING' => 'COUNT(*) > 1',
  64                                 ]
  65                         );
  66                         foreach ( $res as $row ) {
  67                                 $bestBlock = null;
  68                                 $res2 = $db->select(
  69                                         $blockQuery['tables'],
  70                                         $blockQuery['fields'],
  71                                         [
  72                                                 'ipb_user' => $row->ipb_user,
  73                                         ],
  74                                         __METHOD__,
  75                                         [],
  76                                         $blockQuery['joins']
  77                                 );
  78                                 foreach ( $res2 as $row2 ) {
  79                                         $block = Block::newFromRow( $row2 );
  80                                         if ( !$bestBlock ) {
  81                                                 $bestBlock = $block;
  82                                                 continue;
  83                                         }
  84
  85                                         // Find the most-restrictive block. Can't use
  86                                         // Block::chooseBlock because that's for IP blocks, not
  87                                         // user blocks.
  88                                         $keep = null;
  89                                         if ( $keep === null && $block->getExpiry() !== $bestBlock->getExpiry() ) {
  90                                                 // This works for infinite blocks because 'infinity' > '20141024234513'
  91                                                 $keep = $block->getExpiry() > $bestBlock->getExpiry();
  92                                         }
  93                                         if ( $keep === null ) {
  94                                                 foreach ( [ 'createaccount', 'sendemail', 'editownusertalk' ] as $action ) {
  95                                                         if ( $block->prevents( $action ) xor $bestBlock->prevents( $action ) ) {
  96                                                                 $keep = $block->prevents( $action );
  97                                                                 break;
  98                                                         }
  99                                                 }
 100                                         }
 101
 102                                         if ( $keep ) {
 103                                                 $delete[] = $bestBlock->getId();
 104                                                 $bestBlock = $block;
 105                                         } else {
 106                                                 $delete[] = $block->getId();
 107                                         }
 108                                 }
 109                         }
 110
 111                         if ( $delete ) {
 112                                 $db->delete(
 113                                         'ipblocks',
 114                                         [ 'ipb_id' => $delete ],
 115                                         __METHOD__
 116                                 );
 117                         }
 118                 }
 119
 120                 // Step 2: Update the user name in any blocks where it doesn't match
 121                 for ( $from = 1; $from <= $max; $from += $this->mBatchSize ) {
 122                         $to = min( $max, $from + $this->mBatchSize - 1 );
 123                         $this->output( "Cleaning up mismatched user name ($from-$to of $max)\n" );
 124
 125                         $res = $db->select(
 126                                 [ 'ipblocks', 'user' ],
 127                                 [ 'ipb_id', 'user_name' ],
 128                                 [
 129                                         'ipb_user = user_id',
 130                                         "ipb_user >= $from",
 131                                         "ipb_user <= $to",
 132                                         'ipb_address != user_name',
 133                                 ],
 134                                 __METHOD__
 135                         );
 136                         foreach ( $res as $row ) {
 137                                 $db->update(
 138                                         'ipblocks',
 139                                         [ 'ipb_address' => $row->user_name ],
 140                                         [ 'ipb_id' => $row->ipb_id ],
 141                                         __METHOD__
 142                                 );
 143                         }
 144                 }
 145
 146                 $this->output( "Done!\n" );
 147         }
 148 }
 149
 150 $maintClass = "CleanupBlocks";
 151 require_once RUN_MAINTENANCE_IF_MAIN;