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'], 0, false, false, $this->getUser() );
  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                 $title = $this->file->getTitle();
  75                 $permissionErrors = array_merge(
  76                         $title->getUserPermissionsErrors( 'edit' , $user ),
  77                         $title->getUserPermissionsErrors( 'upload' , $user )
  78                 );
  79
  80                 if ( $permissionErrors ) {
  81                         $this->dieUsageMsg( $permissionErrors[0] );
  82                 }
  83         }
  84
  85         /**
  86          * Validate the user parameters and set $this->archiveName and $this->file.
  87          * Throws an error if validation fails
  88          */
  89         protected function validateParameters() {
  90                 // Validate the input title
  91                 $title = Title::makeTitleSafe( NS_FILE, $this->params['filename'] );
  92                 if ( is_null( $title ) ) {
  93                         $this->dieUsageMsg( array( 'invalidtitle', $this->params['filename'] ) );
  94                 }
  95                 $localRepo = RepoGroup::singleton()->getLocalRepo();
  96
  97                 // Check if the file really exists
  98                 $this->file = $localRepo->newFile( $title );
  99                 if ( !$this->file->exists() ) {
 100                         $this->dieUsageMsg( 'notanarticle' );
 101                 }
 102
 103                 // Check if the archivename is valid for this file
 104                 $this->archiveName = $this->params['archivename'];
 105                 $oldFile = $localRepo->newFromArchiveName( $title, $this->archiveName );
 106                 if ( !$oldFile->exists() ) {
 107                         $this->dieUsageMsg( 'filerevert-badversion' );
 108                 }
 109         }
 110
 111         public function mustBePosted() {
 112                 return true;
 113         }
 114
 115         public function isWriteMode() {
 116                 return true;
 117         }
 118
 119         public function getAllowedParams() {
 120                 return array(
 121                         'filename' => array(
 122                                 ApiBase::PARAM_TYPE => 'string',
 123                                 ApiBase::PARAM_REQUIRED => true,
 124                         ),
 125                         'comment' => array(
 126                                 ApiBase::PARAM_DFLT => '',
 127                         ),
 128                         'archivename' => array(
 129                                 ApiBase::PARAM_TYPE => 'string',
 130                                 ApiBase::PARAM_REQUIRED => true,
 131                         ),
 132                         'token' => array(
 133                                 ApiBase::PARAM_TYPE => 'string',
 134                                 ApiBase::PARAM_REQUIRED => true
 135                         ),
 136                 );
 137
 138         }
 139
 140         public function getParamDescription() {
 141                 return array(
 142                         'filename' => 'Target filename without the File: prefix',
 143                         'token' => 'Edit token. You can get one of these through prop=info',
 144                         'comment' => 'Upload comment',
 145                         'archivename' => 'Archive name of the revision to revert to',
 146                 );
 147         }
 148
 149         public function getResultProperties() {
 150                 return array(
 151                         '' => array(
 152                                 'result' => array(
 153                                         ApiBase::PROP_TYPE => array(
 154                                                 'Success',
 155                                                 'Failure'
 156                                         )
 157                                 ),
 158                                 'errors' => array(
 159                                         ApiBase::PROP_TYPE => 'string',
 160                                         ApiBase::PROP_NULLABLE => true
 161                                 )
 162                         )
 163                 );
 164         }
 165
 166         public function getDescription() {
 167                 return array(
 168                         'Revert a file to an old version'
 169                 );
 170         }
 171
 172         public function getPossibleErrors() {
 173                 return array_merge( parent::getPossibleErrors(),
 174                         array(
 175                                 array( 'mustbeloggedin', 'upload' ),
 176                                 array( 'badaccess-groups' ),
 177                                 array( 'invalidtitle', 'title' ),
 178                                 array( 'notanarticle' ),
 179                                 array( 'filerevert-badversion' ),
 180                         )
 181                 );
 182         }
 183
 184         public function needsToken() {
 185                 return true;
 186         }
 187
 188         public function getTokenSalt() {
 189                 return '';
 190         }
 191
 192         public function getExamples() {
 193                 return array(
 194                         'api.php?action=filerevert&filename=Wiki.png&comment=Revert&archivename=20110305152740!Wiki.png&token=+\\'
 195                                 => 'Revert Wiki.png to the version of 20110305152740',
 196                 );
 197         }
 198 }