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1 | <?php |
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2 | /** |
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3 | * Delete old (non-current) revisions from the database |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or modify |
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6 | * it under the terms of the GNU General Public License as published by |
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7 | * the Free Software Foundation; either version 2 of the License, or |
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8 | * (at your option) any later version. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU General Public License along |
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16 | * with this program; if not, write to the Free Software Foundation, Inc., |
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17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 | * http://www.gnu.org/copyleft/gpl.html |
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19 | * |
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20 | * @file |
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21 | * @ingroup Maintenance |
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22 | * @author Rob Church <[email protected]> |
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23 | */ |
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24 | |||
25 | require_once __DIR__ . '/Maintenance.php'; |
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26 | |||
27 | /** |
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28 | * Maintenance script that deletes old (non-current) revisions from the database. |
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29 | * |
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30 | * @ingroup Maintenance |
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31 | */ |
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32 | class DeleteOldRevisions extends Maintenance { |
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33 | public function __construct() { |
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34 | parent::__construct(); |
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35 | $this->addDescription( 'Delete old (non-current) revisions from the database' ); |
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36 | $this->addOption( 'delete', 'Actually perform the deletion' ); |
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37 | $this->addOption( 'page_id', 'List of page ids to work on', false ); |
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38 | } |
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39 | |||
40 | public function execute() { |
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41 | $this->output( "Delete old revisions\n\n" ); |
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42 | $this->doDelete( $this->hasOption( 'delete' ), $this->mArgs ); |
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43 | } |
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44 | |||
45 | function doDelete( $delete = false, $args = [] ) { |
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46 | |||
47 | # Data should come off the master, wrapped in a transaction |
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48 | $dbw = $this->getDB( DB_MASTER ); |
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49 | $this->beginTransaction( $dbw, __METHOD__ ); |
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50 | |||
51 | $pageConds = []; |
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52 | $revConds = []; |
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53 | |||
54 | # If a list of page_ids was provided, limit results to that set of page_ids |
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55 | if ( count( $args ) > 0 ) { |
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56 | $pageConds['page_id'] = $args; |
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57 | $revConds['rev_page'] = $args; |
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58 | $this->output( "Limiting to page IDs " . implode( ',', $args ) . "\n" ); |
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59 | } |
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60 | |||
61 | # Get "active" revisions from the page table |
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62 | $this->output( "Searching for active revisions..." ); |
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63 | $res = $dbw->select( 'page', 'page_latest', $pageConds, __METHOD__ ); |
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64 | $latestRevs = []; |
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65 | foreach ( $res as $row ) { |
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66 | $latestRevs[] = $row->page_latest; |
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67 | } |
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68 | $this->output( "done.\n" ); |
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69 | |||
70 | # Get all revisions that aren't in this set |
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71 | $this->output( "Searching for inactive revisions..." ); |
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72 | if ( count( $latestRevs ) > 0 ) { |
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73 | $revConds[] = 'rev_id NOT IN (' . $dbw->makeList( $latestRevs ) . ')'; |
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74 | } |
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75 | $res = $dbw->select( 'revision', 'rev_id', $revConds, __METHOD__ ); |
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76 | $oldRevs = []; |
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77 | foreach ( $res as $row ) { |
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78 | $oldRevs[] = $row->rev_id; |
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79 | } |
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80 | $this->output( "done.\n" ); |
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81 | |||
82 | # Inform the user of what we're going to do |
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83 | $count = count( $oldRevs ); |
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84 | $this->output( "$count old revisions found.\n" ); |
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85 | |||
86 | # Delete as appropriate |
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87 | if ( $delete && $count ) { |
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88 | $this->output( "Deleting..." ); |
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89 | $dbw->delete( 'revision', [ 'rev_id' => $oldRevs ], __METHOD__ ); |
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90 | $this->output( "done.\n" ); |
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91 | } |
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92 | |||
93 | # This bit's done |
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94 | # Purge redundant text records |
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95 | $this->commitTransaction( $dbw, __METHOD__ ); |
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96 | if ( $delete ) { |
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97 | $this->purgeRedundantText( true ); |
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98 | } |
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99 | } |
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100 | } |
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101 | |||
102 | $maintClass = "DeleteOldRevisions"; |
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103 | require_once RUN_MAINTENANCE_IF_MAIN; |
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104 |
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.