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                 $this->getResult()->beginContinuation( $params['continue'], array(), array() );
  56
  57                 $pageSet = $this->getPageSet();
  58                 $pageSet->execute();
  59
  60                 $result = array();
  61
  62                 self::addValues( $result, $pageSet->getInvalidTitles(), 'invalid', 'title' );
  63                 self::addValues( $result, $pageSet->getSpecialTitles(), 'special', 'title' );
  64                 self::addValues( $result, $pageSet->getMissingPageIDs(), 'missing', 'pageid' );
  65                 self::addValues( $result, $pageSet->getMissingRevisionIDs(), 'missing', 'revid' );
  66                 self::addValues( $result, $pageSet->getInterwikiTitlesAsResult() );
  67
  68                 foreach ( $pageSet->getTitles() as $title ) {
  69                         $r = array();
  70                         $r['id'] = $title->getArticleID();
  71                         ApiQueryBase::addTitleInfo( $r, $title );
  72                         if ( !$title->exists() ) {
  73                                 $r['missing'] = '';
  74                         }
  75
  76                         $file = wfFindFile( $title );
  77                         if ( !$file ) {
  78                                 $r['result'] = 'Failure';
  79                                 $r['errormessage'] = 'File does not exist';
  80                                 $result[] = $r;
  81                                 continue;
  82                         }
  83                         $handler = $file->getHandler();
  84                         if ( !$handler || !$handler->canRotate() ) {
  85                                 $r['result'] = 'Failure';
  86                                 $r['errormessage'] = 'File type cannot be rotated';
  87                                 $result[] = $r;
  88                                 continue;
  89                         }
  90
  91                         // Check whether we're allowed to rotate this file
  92                         $permError = $this->checkPermissions( $this->getUser(), $file->getTitle() );
  93                         if ( $permError !== null ) {
  94                                 $r['result'] = 'Failure';
  95                                 $r['errormessage'] = $permError;
  96                                 $result[] = $r;
  97                                 continue;
  98                         }
  99
 100                         $srcPath = $file->getLocalRefPath();
 101                         if ( $srcPath === false ) {
 102                                 $r['result'] = 'Failure';
 103                                 $r['errormessage'] = 'Cannot get local file path';
 104                                 $result[] = $r;
 105                                 continue;
 106                         }
 107                         $ext = strtolower( pathinfo( "$srcPath", PATHINFO_EXTENSION ) );
 108                         $tmpFile = TempFSFile::factory( 'rotate_', $ext );
 109                         $dstPath = $tmpFile->getPath();
 110                         $err = $handler->rotate( $file, array(
 111                                 "srcPath" => $srcPath,
 112                                 "dstPath" => $dstPath,
 113                                 "rotation" => $rotation
 114                         ) );
 115                         if ( !$err ) {
 116                                 $comment = wfMessage(
 117                                         'rotate-comment'
 118                                 )->numParams( $rotation )->inContentLanguage()->text();
 119                                 $status = $file->upload( $dstPath,
 120                                         $comment, $comment, 0, false, false, $this->getUser() );
 121                                 if ( $status->isGood() ) {
 122                                         $r['result'] = 'Success';
 123                                 } else {
 124                                         $r['result'] = 'Failure';
 125                                         $r['errormessage'] = $this->getResult()->convertStatusToArray( $status );
 126                                 }
 127                         } else {
 128                                 $r['result'] = 'Failure';
 129                                 $r['errormessage'] = $err->toText();
 130                         }
 131                         $result[] = $r;
 132                 }
 133                 $apiResult = $this->getResult();
 134                 $apiResult->setIndexedTagName( $result, 'page' );
 135                 $apiResult->addValue( null, $this->getModuleName(), $result );
 136                 $apiResult->endContinuation();
 137         }
 138
 139         /**
 140          * Get a cached instance of an ApiPageSet object
 141          * @return ApiPageSet
 142          */
 143         private function getPageSet() {
 144                 if ( $this->mPageSet === null ) {
 145                         $this->mPageSet = new ApiPageSet( $this, 0, NS_FILE );
 146                 }
 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
 167                         return $msg['info'];
 168                 }
 169
 170                 return null;
 171         }
 172
 173         public function mustBePosted() {
 174                 return true;
 175         }
 176
 177         public function isWriteMode() {
 178                 return true;
 179         }
 180
 181         public function getAllowedParams( $flags = 0 ) {
 182                 $result = array(
 183                         'rotation' => array(
 184                                 ApiBase::PARAM_TYPE => array( '90', '180', '270' ),
 185                                 ApiBase::PARAM_REQUIRED => true
 186                         ),
 187                         'continue' => array(
 188                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 189                         ),
 190                 );
 191                 if ( $flags ) {
 192                         $result += $this->getPageSet()->getFinalParams( $flags );
 193                 }
 194
 195                 return $result;
 196         }
 197
 198         public function needsToken() {
 199                 return 'csrf';
 200         }
 201
 202         protected function getExamplesMessages() {
 203                 return array(
 204                         'action=imagerotate&titles=File:Example.jpg&rotation=90&token=123ABC'
 205                                 => 'apihelp-imagerotate-example-simple',
 206                         'action=imagerotate&generator=categorymembers&gcmtitle=Category:Flip&gcmtype=file&' .
 207                                 'rotation=180&token=123ABC'
 208                                 => 'apihelp-imagerotate-example-generator',
 209                 );
 210         }
 211 }