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   1  <?php
   2  /**
   3   * Core functions for deleteArchivedFiles.php
   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  /**
  25   * Core functions for deleteArchivedFiles.php
  26   *
  27   * @ingroup Maintenance
  28   */
  29  class DeleteArchivedFilesImplementation {
  30  	public static function doDelete( $output, $force ) {
  31          # Data should come off the master, wrapped in a transaction
  32          $dbw = wfGetDB( DB_MASTER );
  33          $dbw->begin( __METHOD__ );
  34          $tbl_arch = $dbw->tableName( 'filearchive' );
  35          $repo = RepoGroup::singleton()->getLocalRepo();
  36          # Get "active" revisions from the filearchive table
  37          $output->handleOutput( "Searching for and deleting archived files...\n" );
  38          $res = $dbw->query( "SELECT fa_id,fa_storage_group,fa_storage_key,fa_sha1 FROM $tbl_arch" );
  39          $count = 0;
  40          foreach ( $res as $row ) {
  41              $key = $row->fa_storage_key;
  42              if ( !strlen( $key ) ) {
  43                  $output->handleOutput( "Entry with ID {$row->fa_id} has empty key, skipping\n" );
  44                  continue;
  45              }
  46              $group = $row->fa_storage_group;
  47              $id = $row->fa_id;
  48              $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
  49              if ( isset( $row->fa_sha1 ) ) {
  50                  $sha1 = $row->fa_sha1;
  51              } else {
  52                  // old row, populate from key
  53                  $sha1 = LocalRepo::getHashFromKey( $key );
  54              }
  55              // Check if the file is used anywhere...
  56              $inuse = $dbw->selectField(
  57                  'oldimage',
  58                  '1',
  59                  array(
  60                      'oi_sha1' => $sha1,
  61                      'oi_deleted & ' . File::DELETED_FILE => File::DELETED_FILE
  62                  ),
  63                  __METHOD__,
  64                  array( 'FOR UPDATE' )
  65              );
  66              if ( $path && $repo->fileExists( $path ) && !$inuse ) {
  67                  if ( $repo->quickPurge( $path ) ) {
  68                      $count++;
  69                      $dbw->query( "DELETE FROM $tbl_arch WHERE fa_id = $id" );
  70                  } else {
  71                      $output->handleOutput( "Unable to remove file $path, skipping\n" );
  72                  }
  73              } else {
  74                  $output->handleOutput( "Notice - file '$key' not found in group '$group'\n" );
  75                  if ( $force ) {
  76                      $output->handleOutput( "Got --force, deleting DB entry\n" );
  77                      $dbw->query( "DELETE FROM $tbl_arch WHERE fa_id = $id" );
  78                  }
  79              }
  80          }
  81          $dbw->commit( __METHOD__ );
  82          $output->handleOutput( "Done! [$count file(s)]\n" );
  83      }
  84  }