includes/filerepo/file/ForeignAPIFile.php

   1 <?php
   2 /**
   3  * Foreign file accessible through api.php requests.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup FileAbstraction
  22  */
  23
  24 /**
  25  * Foreign file accessible through api.php requests.
  26  * Very hacky and inefficient, do not use :D
  27  *
  28  * @ingroup FileAbstraction
  29  */
  30 class ForeignAPIFile extends File {
  31         private $mExists;
  32
  33         protected $repoClass = 'ForeignApiRepo';
  34
  35         /**
  36          * @param $title
  37          * @param $repo ForeignApiRepo
  38          * @param $info
  39          * @param bool $exists
  40          */
  41         function __construct( $title, $repo, $info, $exists = false ) {
  42                 parent::__construct( $title, $repo );
  43
  44                 $this->mInfo = $info;
  45                 $this->mExists = $exists;
  46
  47                 $this->assertRepoDefined();
  48         }
  49
  50         /**
  51          * @param $title Title
  52          * @param $repo ForeignApiRepo
  53          * @return ForeignAPIFile|null
  54          */
  55         static function newFromTitle( Title $title, $repo ) {
  56                 $data = $repo->fetchImageQuery( array(
  57                         'titles' => 'File:' . $title->getDBkey(),
  58                         'iiprop' => self::getProps(),
  59                         'prop' => 'imageinfo',
  60                         'iimetadataversion' => MediaHandler::getMetadataVersion()
  61                 ) );
  62
  63                 $info = $repo->getImageInfo( $data );
  64
  65                 if ( $info ) {
  66                         $lastRedirect = isset( $data['query']['redirects'] )
  67                                 ? count( $data['query']['redirects'] ) - 1
  68                                 : -1;
  69                         if ( $lastRedirect >= 0 ) {
  70                                 $newtitle = Title::newFromText( $data['query']['redirects'][$lastRedirect]['to'] );
  71                                 $img = new self( $newtitle, $repo, $info, true );
  72                                 if ( $img ) {
  73                                         $img->redirectedFrom( $title->getDBkey() );
  74                                 }
  75                         } else {
  76                                 $img = new self( $title, $repo, $info, true );
  77                         }
  78                         return $img;
  79                 } else {
  80                         return null;
  81                 }
  82         }
  83
  84         /**
  85          * Get the property string for iiprop and aiprop
  86          * @return string
  87          */
  88         static function getProps() {
  89                 return 'timestamp|user|comment|url|size|sha1|metadata|mime';
  90         }
  91
  92         // Dummy functions...
  93
  94         /**
  95          * @return bool
  96          */
  97         public function exists() {
  98                 return $this->mExists;
  99         }
 100
 101         /**
 102          * @return bool
 103          */
 104         public function getPath() {
 105                 return false;
 106         }
 107
 108         /**
 109          * @param array $params
 110          * @param int $flags
 111          * @return bool|MediaTransformOutput
 112          */
 113         function transform( $params, $flags = 0 ) {
 114                 if ( !$this->canRender() ) {
 115                         // show icon
 116                         return parent::transform( $params, $flags );
 117                 }
 118
 119                 // Note, the this->canRender() check above implies
 120                 // that we have a handler, and it can do makeParamString.
 121                 $otherParams = $this->handler->makeParamString( $params );
 122                 $width = isset( $params['width'] ) ? $params['width'] : -1;
 123                 $height = isset( $params['height'] ) ? $params['height'] : -1;
 124
 125                 $thumbUrl = $this->repo->getThumbUrlFromCache(
 126                         $this->getName(),
 127                         $width,
 128                         $height,
 129                         $otherParams
 130                 );
 131                 if ( $thumbUrl === false ) {
 132                         global $wgLang;
 133                         return $this->repo->getThumbError(
 134                                 $this->getName(),
 135                                 $width,
 136                                 $height,
 137                                 $otherParams,
 138                                 $wgLang->getCode()
 139                         );
 140                 }
 141                 return $this->handler->getTransform( $this, 'bogus', $thumbUrl, $params );
 142         }
 143
 144         // Info we can get from API...
 145
 146         /**
 147          * @param $page int
 148          * @return int|number
 149          */
 150         public function getWidth( $page = 1 ) {
 151                 return isset( $this->mInfo['width'] ) ? intval( $this->mInfo['width'] ) : 0;
 152         }
 153
 154         /**
 155          * @param $page int
 156          * @return int
 157          */
 158         public function getHeight( $page = 1 ) {
 159                 return isset( $this->mInfo['height'] ) ? intval( $this->mInfo['height'] ) : 0;
 160         }
 161
 162         /**
 163          * @return bool|null|string
 164          */
 165         public function getMetadata() {
 166                 if ( isset( $this->mInfo['metadata'] ) ) {
 167                         return serialize( self::parseMetadata( $this->mInfo['metadata'] ) );
 168                 }
 169                 return null;
 170         }
 171
 172         /**
 173          * @param $metadata array
 174          * @return array
 175          */
 176         public static function parseMetadata( $metadata ) {
 177                 if ( !is_array( $metadata ) ) {
 178                         return $metadata;
 179                 }
 180                 $ret = array();
 181                 foreach ( $metadata as $meta ) {
 182                         $ret[$meta['name']] = self::parseMetadata( $meta['value'] );
 183                 }
 184                 return $ret;
 185         }
 186
 187         /**
 188          * @return bool|int|null
 189          */
 190         public function getSize() {
 191                 return isset( $this->mInfo['size'] ) ? intval( $this->mInfo['size'] ) : null;
 192         }
 193
 194         /**
 195          * @return null|string
 196          */
 197         public function getUrl() {
 198                 return isset( $this->mInfo['url'] ) ? strval( $this->mInfo['url'] ) : null;
 199         }
 200
 201         /**
 202          * @param string $method
 203          * @return int|null|string
 204          */
 205         public function getUser( $method = 'text' ) {
 206                 return isset( $this->mInfo['user'] ) ? strval( $this->mInfo['user'] ) : null;
 207         }
 208
 209         /**
 210          * @return null|string
 211          */
 212         public function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
 213                 return isset( $this->mInfo['comment'] ) ? strval( $this->mInfo['comment'] ) : null;
 214         }
 215
 216         /**
 217          * @return null|String
 218          */
 219         function getSha1() {
 220                 return isset( $this->mInfo['sha1'] )
 221                         ? wfBaseConvert( strval( $this->mInfo['sha1'] ), 16, 36, 31 )
 222                         : null;
 223         }
 224
 225         /**
 226          * @return bool|Mixed|string
 227          */
 228         function getTimestamp() {
 229                 return wfTimestamp( TS_MW,
 230                         isset( $this->mInfo['timestamp'] )
 231                                 ? strval( $this->mInfo['timestamp'] )
 232                                 : null
 233                 );
 234         }
 235
 236         /**
 237          * @return string
 238          */
 239         function getMimeType() {
 240                 if ( !isset( $this->mInfo['mime'] ) ) {
 241                         $magic = MimeMagic::singleton();
 242                         $this->mInfo['mime'] = $magic->guessTypesForExtension( $this->getExtension() );
 243                 }
 244                 return $this->mInfo['mime'];
 245         }
 246
 247         /**
 248          * @todo FIXME: May guess wrong on file types that can be eg audio or video
 249          * @return int|string
 250          */
 251         function getMediaType() {
 252                 $magic = MimeMagic::singleton();
 253                 return $magic->getMediaType( null, $this->getMimeType() );
 254         }
 255
 256         /**
 257          * @return bool|string
 258          */
 259         function getDescriptionUrl() {
 260                 return isset( $this->mInfo['descriptionurl'] )
 261                         ? $this->mInfo['descriptionurl']
 262                         : false;
 263         }
 264
 265         /**
 266          * Only useful if we're locally caching thumbs anyway...
 267          * @param $suffix string
 268          * @return null|string
 269          */
 270         function getThumbPath( $suffix = '' ) {
 271                 if ( $this->repo->canCacheThumbs() ) {
 272                         $path = $this->repo->getZonePath( 'thumb' ) . '/' . $this->getHashPath( $this->getName() );
 273                         if ( $suffix ) {
 274                                 $path = $path . $suffix . '/';
 275                         }
 276                         return $path;
 277                 } else {
 278                         return null;
 279                 }
 280         }
 281
 282         /**
 283          * @return array
 284          */
 285         function getThumbnails() {
 286                 $dir = $this->getThumbPath( $this->getName() );
 287                 $iter = $this->repo->getBackend()->getFileList( array( 'dir' => $dir ) );
 288
 289                 $files = array();
 290                 foreach ( $iter as $file ) {
 291                         $files[] = $file;
 292                 }
 293
 294                 return $files;
 295         }
 296
 297         /**
 298          * @see File::purgeCache()
 299          */
 300         function purgeCache( $options = array() ) {
 301                 $this->purgeThumbnails( $options );
 302                 $this->purgeDescriptionPage();
 303         }
 304
 305         function purgeDescriptionPage() {
 306                 global $wgMemc, $wgContLang;
 307
 308                 $url = $this->repo->getDescriptionRenderUrl( $this->getName(), $wgContLang->getCode() );
 309                 $key = $this->repo->getLocalCacheKey( 'RemoteFileDescription', 'url', md5( $url ) );
 310
 311                 $wgMemc->delete( $key );
 312         }
 313
 314         /**
 315          * @param $options array
 316          */
 317         function purgeThumbnails( $options = array() ) {
 318                 global $wgMemc;
 319
 320                 $key = $this->repo->getLocalCacheKey( 'ForeignAPIRepo', 'ThumbUrl', $this->getName() );
 321                 $wgMemc->delete( $key );
 322
 323                 $files = $this->getThumbnails();
 324                 // Give media handler a chance to filter the purge list
 325                 $handler = $this->getHandler();
 326                 if ( $handler ) {
 327                         $handler->filterThumbnailPurgeList( $files, $options );
 328                 }
 329
 330                 $dir = $this->getThumbPath( $this->getName() );
 331                 $purgeList = array();
 332                 foreach ( $files as $file ) {
 333                         $purgeList[] = "{$dir}{$file}";
 334                 }
 335
 336                 # Delete the thumbnails
 337                 $this->repo->quickPurgeBatch( $purgeList );
 338                 # Clear out the thumbnail directory if empty
 339                 $this->repo->quickCleanDir( $dir );
 340         }
 341 }