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 = [];
 107         }
 108
 109         /**
 110          * @param int $page
 111          * @return bool
 112          */
 113         private function cachePageDimensions( $page = 1 ) {
 114                 $page = (int)$page;
 115                 if ( $page < 1 ) {
 116                         $page = 1;
 117                 }
 118
 119                 if ( !isset( $this->dims[$page] ) ) {
 120                         if ( !$this->getHandler() ) {
 121                                 return false;
 122                         }
 123                         $this->dims[$page] = $this->handler->getPageDimensions( $this, $page );
 124                 }
 125
 126                 return $this->dims[$page];
 127         }
 128
 129         /**
 130          * @param int $page
 131          * @return int
 132          */
 133         function getWidth( $page = 1 ) {
 134                 $dim = $this->cachePageDimensions( $page );
 135
 136                 return $dim['width'];
 137         }
 138
 139         /**
 140          * @param int $page
 141          * @return int
 142          */
 143         function getHeight( $page = 1 ) {
 144                 $dim = $this->cachePageDimensions( $page );
 145
 146                 return $dim['height'];
 147         }
 148
 149         /**
 150          * @return bool|string
 151          */
 152         function getMimeType() {
 153                 if ( !isset( $this->mime ) ) {
 154                         $magic = MimeMagic::singleton();
 155                         $this->mime = $magic->guessMimeType( $this->getLocalRefPath() );
 156                 }
 157
 158                 return $this->mime;
 159         }
 160
 161         /**
 162          * @param string $filename
 163          * @return array|bool
 164          */
 165         function getImageSize( $filename ) {
 166                 if ( !$this->getHandler() ) {
 167                         return false;
 168                 }
 169
 170                 return $this->handler->getImageSize( $this, $this->getLocalRefPath() );
 171         }
 172
 173         /**
 174          * @return int
 175          */
 176         function getBitDepth() {
 177                 $gis = $this->getImageSize( $this->getLocalRefPath() );
 178
 179                 if ( !$gis || !isset( $gis['bits'] ) ) {
 180                         return 0;
 181                 }
 182                 return $gis['bits'];
 183         }
 184
 185         /**
 186          * @return bool
 187          */
 188         function getMetadata() {
 189                 if ( !isset( $this->metadata ) ) {
 190                         if ( !$this->getHandler() ) {
 191                                 $this->metadata = false;
 192                         } else {
 193                                 $this->metadata = $this->handler->getMetadata( $this, $this->getLocalRefPath() );
 194                         }
 195                 }
 196
 197                 return $this->metadata;
 198         }
 199
 200         /**
 201          * @return bool|string
 202          */
 203         function getURL() {
 204                 if ( $this->repo ) {
 205                         return $this->repo->getZoneUrl( 'public' ) . '/' .
 206                                 $this->repo->getHashPath( $this->name ) . rawurlencode( $this->name );
 207                 } else {
 208                         return false;
 209                 }
 210         }
 211
 212         /**
 213          * @return bool|int
 214          */
 215         function getSize() {
 216                 $this->assertRepoDefined();
 217
 218                 return $this->repo->getFileSize( $this->path );
 219         }
 220
 221         /**
 222          * Optimize getLocalRefPath() by using an existing local reference.
 223          * The file at the path of $fsFile should not be deleted (or at least
 224          * not until the end of the request). This is mostly a performance hack.
 225          *
 226          * @param FSFile $fsFile
 227          * @return void
 228          */
 229         public function setLocalReference( FSFile $fsFile ) {
 230                 $this->fsFile = $fsFile;
 231         }
 232 }