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
  32         /**
  33          * @var File
  34          */
  35         protected $file;
  36         protected $archiveName;
  37
  38         protected $params;
  39
  40         public function __construct( $main, $action ) {
  41                 parent::__construct( $main, $action );
  42         }
  43
  44         public function execute() {
  45                 $this->params = $this->extractRequestParams();
  46                 // Extract the file and archiveName from the request parameters
  47                 $this->validateParameters();
  48
  49                 // Check whether we're allowed to revert this file
  50                 $this->checkPermissions( $this->getUser() );
  51
  52                 $sourceUrl = $this->file->getArchiveVirtualUrl( $this->archiveName );
  53                 $status = $this->file->upload( $sourceUrl, $this->params['comment'], $this->params['comment'] );
  54
  55                 if ( $status->isGood() ) {
  56                         $result = array( 'result' => 'Success' );
  57                 } else {
  58                         $result = array(
  59                                 'result' => 'Failure',
  60                                 'errors' => $this->getResult()->convertStatusToArray( $status ),
  61                         );
  62                 }
  63
  64                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
  65
  66         }
  67
  68         /**
  69          * Checks that the user has permissions to perform this revert.
  70          * Dies with usage message on inadequate permissions.
  71          * @param $user User The user to check.
  72          */
  73         protected function checkPermissions( $user ) {
  74                 $permissionErrors = array_merge(
  75                         $this->file->getTitle()->getUserPermissionsErrors( 'edit' , $user ),
  76                         $this->file->getTitle()->getUserPermissionsErrors( 'upload' , $user )
  77                 );
  78
  79                 if ( $permissionErrors ) {
  80                         $this->dieUsageMsg( $permissionErrors[0] );
  81                 }
  82         }
  83
  84         /**
  85          * Validate the user parameters and set $this->archiveName and $this->file.
  86          * Throws an error if validation fails
  87          */
  88         protected function validateParameters() {
  89                 // Validate the input title
  90                 $title = Title::makeTitleSafe( NS_FILE, $this->params['filename'] );
  91                 if ( is_null( $title ) ) {
  92                         $this->dieUsageMsg( array( 'invalidtitle', $this->params['filename'] ) );
  93                 }
  94                 // Check if the file really exists
  95                 $this->file = wfLocalFile( $title );
  96                 if ( !$this->file->exists() ) {
  97                         $this->dieUsageMsg( 'notanarticle' );
  98                 }
  99
 100                 // Check if the archivename is valid for this file
 101                 $this->archiveName = $this->params['archivename'];
 102                 $oldFile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $this->archiveName );
 103                 if ( !$oldFile->exists() ) {
 104                         $this->dieUsageMsg( 'filerevert-badversion' );
 105                 }
 106         }
 107
 108         public function mustBePosted() {
 109                 return true;
 110         }
 111
 112         public function isWriteMode() {
 113                 return true;
 114         }
 115
 116         public function getAllowedParams() {
 117                 return array(
 118                         'filename' => array(
 119                                 ApiBase::PARAM_TYPE => 'string',
 120                                 ApiBase::PARAM_REQUIRED => true,
 121                         ),
 122                         'comment' => array(
 123                                 ApiBase::PARAM_DFLT => '',
 124                         ),
 125                         'archivename' => array(
 126                                 ApiBase::PARAM_TYPE => 'string',
 127                                 ApiBase::PARAM_REQUIRED => true,
 128                         ),
 129                         'token' => null,
 130                 );
 131
 132         }
 133
 134         public function getParamDescription() {
 135                 return array(
 136                         'filename' => 'Target filename without the File: prefix',
 137                         'token' => 'Edit token. You can get one of these through prop=info',
 138                         'comment' => 'Upload comment',
 139                         'archivename' => 'Archive name of the revision to revert to',
 140                 );
 141         }
 142
 143         public function getResultProperties() {
 144                 return array(
 145                         '' => array(
 146                                 'result' => array(
 147                                         ApiBase::PROP_TYPE => array(
 148                                                 'Success',
 149                                                 'Failure'
 150                                         )
 151                                 ),
 152                                 'errors' => array(
 153                                         ApiBase::PROP_TYPE => 'string',
 154                                         ApiBase::PROP_NULLABLE => true
 155                                 )
 156                         )
 157                 );
 158         }
 159
 160         public function getDescription() {
 161                 return array(
 162                         'Revert a file to an old version'
 163                 );
 164         }
 165
 166         public function getPossibleErrors() {
 167                 return array_merge( parent::getPossibleErrors(),
 168                         array(
 169                                 array( 'mustbeloggedin', 'upload' ),
 170                                 array( 'badaccess-groups' ),
 171                                 array( 'invalidtitle', 'title' ),
 172                                 array( 'notanarticle' ),
 173                                 array( 'filerevert-badversion' ),
 174                         )
 175                 );
 176         }
 177
 178         public function needsToken() {
 179                 return true;
 180         }
 181
 182         public function getTokenSalt() {
 183                 return '';
 184         }
 185
 186         public function getExamples() {
 187                 return array(
 188                         'api.php?action=filerevert&filename=Wiki.png&comment=Revert&archivename=20110305152740!Wiki.png&token=+\\'
 189                                 => 'Revert Wiki.png to the version of 20110305152740',
 190                 );
 191         }
 192
 193         public function getVersion() {
 194                 return __CLASS__ . ': $Id$';
 195         }
 196 }