includes/specials/SpecialLockdb.php

   1 <?php
   2 /**
   3  * Implements Special:Lockdb
   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 SpecialPage
  22  */
  23
  24 /**
  25  * A form to make the database readonly (eg for maintenance purposes).
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class SpecialLockdb extends FormSpecialPage {
  30         protected $reason = '';
  31
  32         public function __construct() {
  33                 parent::__construct( 'Lockdb', 'siteadmin' );
  34         }
  35
  36         public function doesWrites() {
  37                 return false;
  38         }
  39
  40         public function requiresWrite() {
  41                 return false;
  42         }
  43
  44         public function checkExecutePermissions( User $user ) {
  45                 parent::checkExecutePermissions( $user );
  46                 # If the lock file isn't writable, we can do sweet bugger all
  47                 if ( !is_writable( dirname( $this->getConfig()->get( 'ReadOnlyFile' ) ) ) ) {
  48                         throw new ErrorPageError( 'lockdb', 'lockfilenotwritable' );
  49                 }
  50                 if ( file_exists( $this->getConfig()->get( 'ReadOnlyFile' ) ) ) {
  51                         throw new ErrorPageError( 'lockdb', 'databaselocked' );
  52                 }
  53         }
  54
  55         protected function getFormFields() {
  56                 return [
  57                         'Reason' => [
  58                                 'type' => 'textarea',
  59                                 'rows' => 4,
  60                                 'vertical-label' => true,
  61                                 'label-message' => 'enterlockreason',
  62                         ],
  63                         'Confirm' => [
  64                                 'type' => 'toggle',
  65                                 'label-message' => 'lockconfirm',
  66                         ],
  67                 ];
  68         }
  69
  70         protected function alterForm( HTMLForm $form ) {
  71                 $form->setWrapperLegend( false )
  72                         ->setHeaderText( $this->msg( 'lockdbtext' )->parseAsBlock() )
  73                         ->setSubmitTextMsg( 'lockbtn' );
  74         }
  75
  76         public function onSubmit( array $data ) {
  77                 global $wgContLang;
  78
  79                 if ( !$data['Confirm'] ) {
  80                         return Status::newFatal( 'locknoconfirm' );
  81                 }
  82
  83                 MediaWiki\suppressWarnings();
  84                 $fp = fopen( $this->getConfig()->get( 'ReadOnlyFile' ), 'w' );
  85                 MediaWiki\restoreWarnings();
  86
  87                 if ( false === $fp ) {
  88                         # This used to show a file not found error, but the likeliest reason for fopen()
  89                         # to fail at this point is insufficient permission to write to the file...good old
  90                         # is_writable() is plain wrong in some cases, it seems...
  91                         return Status::newFatal( 'lockfilenotwritable' );
  92                 }
  93                 fwrite( $fp, $data['Reason'] );
  94                 $timestamp = wfTimestampNow();
  95                 fwrite( $fp, "\n<p>" . $this->msg( 'lockedbyandtime',
  96                         $this->getUser()->getName(),
  97                         $wgContLang->date( $timestamp, false, false ),
  98                         $wgContLang->time( $timestamp, false, false )
  99                 )->inContentLanguage()->text() . "</p>\n" );
 100                 fclose( $fp );
 101
 102                 return Status::newGood();
 103         }
 104
 105         public function onSuccess() {
 106                 $out = $this->getOutput();
 107                 $out->addSubtitle( $this->msg( 'lockdbsuccesssub' ) );
 108                 $out->addWikiMsg( 'lockdbsuccesstext' );
 109         }
 110
 111         protected function getDisplayFormat() {
 112                 return 'ooui';
 113         }
 114
 115         protected function getGroupName() {
 116                 return 'wiki';
 117         }
 118 }