includes/api/ApiFileRevert.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on March 5, 2011
   6  *
   7  * Copyright © 2011 Bryan Tong Minh <Bryan.TongMinh@Gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * @ingroup API
  29  */
  30 class ApiFileRevert extends ApiBase {
  31         /** @var LocalFile */
  32         protected $file;
  33
  34         /** @var string */
  35         protected $archiveName;
  36
  37         /** @var array */
  38         protected $params;
  39
  40         public function execute() {
  41                 $this->params = $this->extractRequestParams();
  42                 // Extract the file and archiveName from the request parameters
  43                 $this->validateParameters();
  44
  45                 // Check whether we're allowed to revert this file
  46                 $this->checkPermissions( $this->getUser() );
  47
  48                 $sourceUrl = $this->file->getArchiveVirtualUrl( $this->archiveName );
  49                 $status = $this->file->upload(
  50                         $sourceUrl,
  51                         $this->params['comment'],
  52                         $this->params['comment'],
  53                         0,
  54                         false,
  55                         false,
  56                         $this->getUser()
  57                 );
  58
  59                 if ( $status->isGood() ) {
  60                         $result = array( 'result' => 'Success' );
  61                 } else {
  62                         $result = array(
  63                                 'result' => 'Failure',
  64                                 'errors' => $this->getResult()->convertStatusToArray( $status ),
  65                         );
  66                 }
  67
  68                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
  69         }
  70
  71         /**
  72          * Checks that the user has permissions to perform this revert.
  73          * Dies with usage message on inadequate permissions.
  74          * @param User $user The user to check.
  75          */
  76         protected function checkPermissions( $user ) {
  77                 $title = $this->file->getTitle();
  78                 $permissionErrors = array_merge(
  79                         $title->getUserPermissionsErrors( 'edit', $user ),
  80                         $title->getUserPermissionsErrors( 'upload', $user )
  81                 );
  82
  83                 if ( $permissionErrors ) {
  84                         $this->dieUsageMsg( $permissionErrors[0] );
  85                 }
  86         }
  87
  88         /**
  89          * Validate the user parameters and set $this->archiveName and $this->file.
  90          * Throws an error if validation fails
  91          */
  92         protected function validateParameters() {
  93                 // Validate the input title
  94                 $title = Title::makeTitleSafe( NS_FILE, $this->params['filename'] );
  95                 if ( is_null( $title ) ) {
  96                         $this->dieUsageMsg( array( 'invalidtitle', $this->params['filename'] ) );
  97                 }
  98                 $localRepo = RepoGroup::singleton()->getLocalRepo();
  99
 100                 // Check if the file really exists
 101                 $this->file = $localRepo->newFile( $title );
 102                 if ( !$this->file->exists() ) {
 103                         $this->dieUsageMsg( 'notanarticle' );
 104                 }
 105
 106                 // Check if the archivename is valid for this file
 107                 $this->archiveName = $this->params['archivename'];
 108                 $oldFile = $localRepo->newFromArchiveName( $title, $this->archiveName );
 109                 if ( !$oldFile->exists() ) {
 110                         $this->dieUsageMsg( 'filerevert-badversion' );
 111                 }
 112         }
 113
 114         public function mustBePosted() {
 115                 return true;
 116         }
 117
 118         public function isWriteMode() {
 119                 return true;
 120         }
 121
 122         public function getAllowedParams() {
 123                 return array(
 124                         'filename' => array(
 125                                 ApiBase::PARAM_TYPE => 'string',
 126                                 ApiBase::PARAM_REQUIRED => true,
 127                         ),
 128                         'comment' => array(
 129                                 ApiBase::PARAM_DFLT => '',
 130                         ),
 131                         'archivename' => array(
 132                                 ApiBase::PARAM_TYPE => 'string',
 133                                 ApiBase::PARAM_REQUIRED => true,
 134                         ),
 135                 );
 136         }
 137
 138         public function needsToken() {
 139                 return 'csrf';
 140         }
 141
 142         protected function getExamplesMessages() {
 143                 return array(
 144                         'action=filerevert&filename=Wiki.png&comment=Revert&' .
 145                                 'archivename=20110305152740!Wiki.png&token=123ABC'
 146                                 => 'apihelp-filerevert-example-revert',
 147                 );
 148         }
 149 }