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         /**
  28          * Add all items from $values into the result
  29          * @param array $result output
  30          * @param array $values values to add
  31          * @param string $flag the name of the boolean flag to mark this element
  32          * @param string $name if given, name of the value
  33          */
  34         private static function addValues( array &$result, $values, $flag = null, $name = null ) {
  35                 foreach ( $values as $val ) {
  36                         if ( $val instanceof Title ) {
  37                                 $v = array();
  38                                 ApiQueryBase::addTitleInfo( $v, $val );
  39                         } elseif ( $name !== null ) {
  40                                 $v = array( $name => $val );
  41                         } else {
  42                                 $v = $val;
  43                         }
  44                         if ( $flag !== null ) {
  45                                 $v[$flag] = '';
  46                         }
  47                         $result[] = $v;
  48                 }
  49         }
  50
  51         public function execute() {
  52                 $params = $this->extractRequestParams();
  53                 $rotation = $params['rotation'];
  54
  55                 $pageSet = $this->getPageSet();
  56                 $pageSet->execute();
  57
  58                 $result = array();
  59
  60                 self::addValues( $result, $pageSet->getInvalidTitles(), 'invalid', 'title' );
  61                 self::addValues( $result, $pageSet->getSpecialTitles(), 'special', 'title' );
  62                 self::addValues( $result, $pageSet->getMissingPageIDs(), 'missing', 'pageid' );
  63                 self::addValues( $result, $pageSet->getMissingRevisionIDs(), 'missing', 'revid' );
  64                 self::addValues( $result, $pageSet->getInterwikiTitlesAsResult() );
  65
  66                 foreach ( $pageSet->getTitles() as $title ) {
  67                         $r = array();
  68                         $r['id'] = $title->getArticleID();
  69                         ApiQueryBase::addTitleInfo( $r, $title );
  70                         if ( !$title->exists() ) {
  71                                 $r['missing'] = '';
  72                         }
  73
  74                         $file = wfFindFile( $title );
  75                         if ( !$file ) {
  76                                 $r['result'] = 'Failure';
  77                                 $r['errormessage'] = 'File does not exist';
  78                                 $result[] = $r;
  79                                 continue;
  80                         }
  81                         $handler = $file->getHandler();
  82                         if ( !$handler || !$handler->canRotate() ) {
  83                                 $r['result'] = 'Failure';
  84                                 $r['errormessage'] = 'File type cannot be rotated';
  85                                 $result[] = $r;
  86                                 continue;
  87                         }
  88
  89                         // Check whether we're allowed to rotate this file
  90                         $permError = $this->checkPermissions( $this->getUser(), $file->getTitle() );
  91                         if ( $permError !== null ) {
  92                                 $r['result'] = 'Failure';
  93                                 $r['errormessage'] = $permError;
  94                                 $result[] = $r;
  95                                 continue;
  96                         }
  97
  98                         $srcPath = $file->getLocalRefPath();
  99                         if ( $srcPath === false ) {
 100                                 $r['result'] = 'Failure';
 101                                 $r['errormessage'] = 'Cannot get local file path';
 102                                 $result[] = $r;
 103                                 continue;
 104                         }
 105                         $ext = strtolower( pathinfo( "$srcPath", PATHINFO_EXTENSION ) );
 106                         $tmpFile = TempFSFile::factory( 'rotate_', $ext );
 107                         $dstPath = $tmpFile->getPath();
 108                         $err = $handler->rotate( $file, array(
 109                                 "srcPath" => $srcPath,
 110                                 "dstPath" => $dstPath,
 111                                 "rotation" => $rotation
 112                         ) );
 113                         if ( !$err ) {
 114                                 $comment = wfMessage(
 115                                         'rotate-comment'
 116                                 )->numParams( $rotation )->inContentLanguage()->text();
 117                                 $status = $file->upload( $dstPath,
 118                                         $comment, $comment, 0, false, false, $this->getUser() );
 119                                 if ( $status->isGood() ) {
 120                                         $r['result'] = 'Success';
 121                                 } else {
 122                                         $r['result'] = 'Failure';
 123                                         $r['errormessage'] = $this->getResult()->convertStatusToArray( $status );
 124                                 }
 125                         } else {
 126                                 $r['result'] = 'Failure';
 127                                 $r['errormessage'] = $err->toText();
 128                         }
 129                         $result[] = $r;
 130                 }
 131                 $apiResult = $this->getResult();
 132                 $apiResult->setIndexedTagName( $result, 'page' );
 133                 $apiResult->addValue( null, $this->getModuleName(), $result );
 134         }
 135
 136         /**
 137          * Get a cached instance of an ApiPageSet object
 138          * @return ApiPageSet
 139          */
 140         private function getPageSet() {
 141                 if ( $this->mPageSet === null ) {
 142                         $this->mPageSet = new ApiPageSet( $this, 0, NS_FILE );
 143                 }
 144
 145                 return $this->mPageSet;
 146         }
 147
 148         /**
 149          * Checks that the user has permissions to perform rotations.
 150          * @param User $user The user to check
 151          * @param Title $title
 152          * @return string|null Permission error message, or null if there is no error
 153          */
 154         protected function checkPermissions( $user, $title ) {
 155                 $permissionErrors = array_merge(
 156                         $title->getUserPermissionsErrors( 'edit', $user ),
 157                         $title->getUserPermissionsErrors( 'upload', $user )
 158                 );
 159
 160                 if ( $permissionErrors ) {
 161                         // Just return the first error
 162                         $msg = $this->parseMsg( $permissionErrors[0] );
 163
 164                         return $msg['info'];
 165                 }
 166
 167                 return null;
 168         }
 169
 170         public function mustBePosted() {
 171                 return true;
 172         }
 173
 174         public function isWriteMode() {
 175                 return true;
 176         }
 177
 178         public function getAllowedParams( $flags = 0 ) {
 179                 $result = array(
 180                         'rotation' => array(
 181                                 ApiBase::PARAM_TYPE => array( '90', '180', '270' ),
 182                                 ApiBase::PARAM_REQUIRED => true
 183                         ),
 184                         'token' => array(
 185                                 ApiBase::PARAM_TYPE => 'string',
 186                                 ApiBase::PARAM_REQUIRED => true
 187                         ),
 188                 );
 189                 if ( $flags ) {
 190                         $result += $this->getPageSet()->getFinalParams( $flags );
 191                 }
 192
 193                 return $result;
 194         }
 195
 196         public function getParamDescription() {
 197                 $pageSet = $this->getPageSet();
 198
 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
 220                 return array_merge(
 221                         parent::getPossibleErrors(),
 222                         $pageSet->getFinalPossibleErrors()
 223                 );
 224         }
 225
 226         public function getExamples() {
 227                 return array(
 228                         'api.php?action=imagerotate&titles=Example.jpg&rotation=90&token=123ABC',
 229                 );
 230         }
 231 }