includes/api/ApiImageRotate.php

   1 <?php
   2 /**
   3  *
   4  * Created on January 3rd, 2013
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  */
  23
  24 class ApiImageRotate extends ApiBase {
  25         private $mPageSet = null;
  26
  27         public function __construct( $main, $action ) {
  28                 parent::__construct( $main, $action );
  29         }
  30
  31         /**
  32          * Add all items from $values into the result
  33          * @param array $result output
  34          * @param array $values values to add
  35          * @param string $flag the name of the boolean flag to mark this element
  36          * @param string $name if given, name of the value
  37          */
  38         private static function addValues( array &$result, $values, $flag = null, $name = null ) {
  39                 foreach ( $values as $val ) {
  40                         if ( $val instanceof Title ) {
  41                                 $v = array();
  42                                 ApiQueryBase::addTitleInfo( $v, $val );
  43                         } elseif ( $name !== null ) {
  44                                 $v = array( $name => $val );
  45                         } else {
  46                                 $v = $val;
  47                         }
  48                         if ( $flag !== null ) {
  49                                 $v[$flag] = '';
  50                         }
  51                         $result[] = $v;
  52                 }
  53         }
  54
  55         public function execute() {
  56                 $params = $this->extractRequestParams();
  57                 $rotation = $params['rotation'];
  58
  59                 $pageSet = $this->getPageSet();
  60                 $pageSet->execute();
  61
  62                 $result = array();
  63
  64                 self::addValues( $result, $pageSet->getInvalidTitles(), 'invalid', 'title' );
  65                 self::addValues( $result, $pageSet->getSpecialTitles(), 'special', 'title' );
  66                 self::addValues( $result, $pageSet->getMissingPageIDs(), 'missing', 'pageid' );
  67                 self::addValues( $result, $pageSet->getMissingRevisionIDs(), 'missing', 'revid' );
  68                 self::addValues( $result, $pageSet->getInterwikiTitlesAsResult() );
  69
  70                 foreach ( $pageSet->getTitles() as $title ) {
  71                         $r = array();
  72                         $r['id'] = $title->getArticleID();
  73                         ApiQueryBase::addTitleInfo( $r, $title );
  74                         if ( !$title->exists() ) {
  75                                 $r['missing'] = '';
  76                         }
  77
  78                         $file = wfFindFile( $title );
  79                         if ( !$file ) {
  80                                 $r['result'] = 'Failure';
  81                                 $r['errormessage'] = 'File does not exist';
  82                                 $result[] = $r;
  83                                 continue;
  84                         }
  85                         $handler = $file->getHandler();
  86                         if ( !$handler || !$handler->canRotate() ) {
  87                                 $r['result'] = 'Failure';
  88                                 $r['errormessage'] = 'File type cannot be rotated';
  89                                 $result[] = $r;
  90                                 continue;
  91                         }
  92
  93                         // Check whether we're allowed to rotate this file
  94                         $permError = $this->checkPermissions( $this->getUser(), $file->getTitle() );
  95                         if ( $permError !== null ) {
  96                                 $r['result'] = 'Failure';
  97                                 $r['errormessage'] = $permError;
  98                                 $result[] = $r;
  99                                 continue;
 100                         }
 101
 102                         $srcPath = $file->getLocalRefPath();
 103                         if ( $srcPath === false ) {
 104                                 $r['result'] = 'Failure';
 105                                 $r['errormessage'] = 'Cannot get local file path';
 106                                 $result[] = $r;
 107                                 continue;
 108                         }
 109                         $ext = strtolower( pathinfo( "$srcPath", PATHINFO_EXTENSION ) );
 110                         $tmpFile = TempFSFile::factory( 'rotate_', $ext );
 111                         $dstPath = $tmpFile->getPath();
 112                         $err = $handler->rotate( $file, array(
 113                                 "srcPath" => $srcPath,
 114                                 "dstPath" => $dstPath,
 115                                 "rotation" => $rotation
 116                         ) );
 117                         if ( !$err ) {
 118                                 $comment = wfMessage(
 119                                         'rotate-comment'
 120                                 )->numParams( $rotation )->inContentLanguage()->text();
 121                                 $status = $file->upload( $dstPath,
 122                                         $comment, $comment, 0, false, false, $this->getUser() );
 123                                 if ( $status->isGood() ) {
 124                                         $r['result'] = 'Success';
 125                                 } else {
 126                                         $r['result'] = 'Failure';
 127                                         $r['errormessage'] = $this->getResult()->convertStatusToArray( $status );
 128                                 }
 129                         } else {
 130                                 $r['result'] = 'Failure';
 131                                 $r['errormessage'] = $err->toText();
 132                         }
 133                         $result[] = $r;
 134                 }
 135                 $apiResult = $this->getResult();
 136                 $apiResult->setIndexedTagName( $result, 'page' );
 137                 $apiResult->addValue( null, $this->getModuleName(), $result );
 138         }
 139
 140         /**
 141          * Get a cached instance of an ApiPageSet object
 142          * @return ApiPageSet
 143          */
 144         private function getPageSet() {
 145                 if ( $this->mPageSet === null ) {
 146                         $this->mPageSet = new ApiPageSet( $this, 0, NS_FILE );
 147                 }
 148                 return $this->mPageSet;
 149         }
 150
 151         /**
 152          * Checks that the user has permissions to perform rotations.
 153          * @param User $user The user to check
 154          * @param Title $title
 155          * @return string|null Permission error message, or null if there is no error
 156          */
 157         protected function checkPermissions( $user, $title ) {
 158                 $permissionErrors = array_merge(
 159                         $title->getUserPermissionsErrors( 'edit', $user ),
 160                         $title->getUserPermissionsErrors( 'upload', $user )
 161                 );
 162
 163                 if ( $permissionErrors ) {
 164                         // Just return the first error
 165                         $msg = $this->parseMsg( $permissionErrors[0] );
 166                         return $msg['info'];
 167                 }
 168
 169                 return null;
 170         }
 171
 172         public function mustBePosted() {
 173                 return true;
 174         }
 175
 176         public function isWriteMode() {
 177                 return true;
 178         }
 179
 180         public function getAllowedParams( $flags = 0 ) {
 181                 $result = array(
 182                         'rotation' => array(
 183                                 ApiBase::PARAM_TYPE => array( '90', '180', '270' ),
 184                                 ApiBase::PARAM_REQUIRED => true
 185                         ),
 186                         'token' => array(
 187                                 ApiBase::PARAM_TYPE => 'string',
 188                                 ApiBase::PARAM_REQUIRED => true
 189                         ),
 190                 );
 191                 if ( $flags ) {
 192                         $result += $this->getPageSet()->getFinalParams( $flags );
 193                 }
 194                 return $result;
 195         }
 196
 197         public function getParamDescription() {
 198                 $pageSet = $this->getPageSet();
 199                 return $pageSet->getFinalParamDescription() + array(
 200                         'rotation' => 'Degrees to rotate image clockwise',
 201                         'token' => 'Edit token. You can get one of these through action=tokens',
 202                 );
 203         }
 204
 205         public function getDescription() {
 206                 return 'Rotate one or more images';
 207         }
 208
 209         public function needsToken() {
 210                 return true;
 211         }
 212
 213         public function getTokenSalt() {
 214                 return '';
 215         }
 216
 217         public function getPossibleErrors() {
 218                 $pageSet = $this->getPageSet();
 219                 return array_merge(
 220                         parent::getPossibleErrors(),
 221                         $pageSet->getFinalPossibleErrors()
 222                 );
 223         }
 224
 225         public function getExamples() {
 226                 return array(
 227                         'api.php?action=imagerotate&titles=Example.jpg&rotation=90&token=123ABC',
 228                 );
 229         }
 230 }