includes/filerepo/file/UnregisteredLocalFile.php

   1 <?php
   2 /**
   3  * File without associated database record.
   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  * A file object referring to either a standalone local file, or a file in a
  26  * local repository with no database, for example an FileRepo repository.
  27  *
  28  * Read-only.
  29  *
  30  * @todo Currently it doesn't really work in the repository role, there are
  31  * lots of functions missing. It is used by the WebStore extension in the
  32  * standalone role.
  33  *
  34  * @ingroup FileAbstraction
  35  */
  36 class UnregisteredLocalFile extends File {
  37         /** @var Title */
  38         protected $title;
  39
  40         /** @var string */
  41         protected $path;
  42
  43         /** @var bool|string */
  44         protected $mime;
  45
  46         /** @var array Dimension data */
  47         protected $dims;
  48
  49         /** @var bool|string Handler-specific metadata which will be saved in the img_metadata field */
  50         protected $metadata;
  51
  52         /** @var MediaHandler */
  53         public $handler;
  54
  55         /**
  56          * @param string $path Storage path
  57          * @param string $mime
  58          * @return UnregisteredLocalFile
  59          */
  60         static function newFromPath( $path, $mime ) {
  61                 return new self( false, false, $path, $mime );
  62         }
  63
  64         /**
  65          * @param Title $title
  66          * @param FileRepo $repo
  67          * @return UnregisteredLocalFile
  68          */
  69         static function newFromTitle( $title, $repo ) {
  70                 return new self( $title, $repo, false, false );
  71         }
  72
  73         /**
  74          * Create an UnregisteredLocalFile based on a path or a (title,repo) pair.
  75          * A FileRepo object is not required here, unlike most other File classes.
  76          *
  77          * @throws MWException
  78          * @param Title|bool $title
  79          * @param FileRepo|bool $repo
  80          * @param string|bool $path
  81          * @param string|bool $mime
  82          */
  83         function __construct( $title = false, $repo = false, $path = false, $mime = false ) {
  84                 if ( !( $title && $repo ) && !$path ) {
  85                         throw new MWException( __METHOD__ .
  86                                 ': not enough parameters, must specify title and repo, or a full path' );
  87                 }
  88                 if ( $title instanceof Title ) {
  89                         $this->title = File::normalizeTitle( $title, 'exception' );
  90                         $this->name = $repo->getNameFromTitle( $title );
  91                 } else {
  92                         $this->name = basename( $path );
  93                         $this->title = File::normalizeTitle( $this->name, 'exception' );
  94                 }
  95                 $this->repo = $repo;
  96                 if ( $path ) {
  97                         $this->path = $path;
  98                 } else {
  99                         $this->assertRepoDefined();
 100                         $this->path = $repo->getRootDirectory() . '/' .
 101                                 $repo->getHashPath( $this->name ) . $this->name;
 102                 }
 103                 if ( $mime ) {
 104                         $this->mime = $mime;
 105                 }
 106                 $this->dims = array();
 107         }
 108
 109         /**
 110          * @param int $page
 111          * @return bool
 112          */
 113         private function cachePageDimensions( $page = 1 ) {
 114                 if ( !isset( $this->dims[$page] ) ) {
 115                         if ( !$this->getHandler() ) {
 116                                 return false;
 117                         }
 118                         $this->dims[$page] = $this->handler->getPageDimensions( $this, $page );
 119                 }
 120
 121                 return $this->dims[$page];
 122         }
 123
 124         /**
 125          * @param int $page
 126          * @return int
 127          */
 128         function getWidth( $page = 1 ) {
 129                 $dim = $this->cachePageDimensions( $page );
 130
 131                 return $dim['width'];
 132         }
 133
 134         /**
 135          * @param int $page
 136          * @return int
 137          */
 138         function getHeight( $page = 1 ) {
 139                 $dim = $this->cachePageDimensions( $page );
 140
 141                 return $dim['height'];
 142         }
 143
 144         /**
 145          * @return bool|string
 146          */
 147         function getMimeType() {
 148                 if ( !isset( $this->mime ) ) {
 149                         $magic = MimeMagic::singleton();
 150                         $this->mime = $magic->guessMimeType( $this->getLocalRefPath() );
 151                 }
 152
 153                 return $this->mime;
 154         }
 155
 156         /**
 157          * @param string $filename
 158          * @return array|bool
 159          */
 160         function getImageSize( $filename ) {
 161                 if ( !$this->getHandler() ) {
 162                         return false;
 163                 }
 164
 165                 return $this->handler->getImageSize( $this, $this->getLocalRefPath() );
 166         }
 167
 168         /**
 169         * @return int
 170         */
 171         function getBitDepth() {
 172                 $gis = $this->getImageSize( $this->getLocalRefPath() );
 173
 174                 if ( !$gis || !isset( $gis['bits'] ) ) {
 175                         return 0;
 176                 }
 177                 return $gis['bits'];
 178         }
 179
 180         /**
 181          * @return bool
 182          */
 183         function getMetadata() {
 184                 if ( !isset( $this->metadata ) ) {
 185                         if ( !$this->getHandler() ) {
 186                                 $this->metadata = false;
 187                         } else {
 188                                 $this->metadata = $this->handler->getMetadata( $this, $this->getLocalRefPath() );
 189                         }
 190                 }
 191
 192                 return $this->metadata;
 193         }
 194
 195         /**
 196          * @return bool|string
 197          */
 198         function getURL() {
 199                 if ( $this->repo ) {
 200                         return $this->repo->getZoneUrl( 'public' ) . '/' .
 201                                 $this->repo->getHashPath( $this->name ) . rawurlencode( $this->name );
 202                 } else {
 203                         return false;
 204                 }
 205         }
 206
 207         /**
 208          * @return bool|int
 209          */
 210         function getSize() {
 211                 $this->assertRepoDefined();
 212
 213                 return $this->repo->getFileSize( $this->path );
 214         }
 215
 216         /**
 217          * Optimize getLocalRefPath() by using an existing local reference.
 218          * The file at the path of $fsFile should not be deleted (or at least
 219          * not until the end of the request). This is mostly a performance hack.
 220          *
 221          * @param FSFile $fsFile
 222          * @return void
 223          */
 224         public function setLocalReference( FSFile $fsFile ) {
 225                 $this->fsFile = $fsFile;
 226         }
 227 }