includes/page/WikiFilePage.php

   1 <?php
   2 /**
   3  * Special handling for file pages.
   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  */
  22
  23 /**
  24  * Special handling for file pages
  25  *
  26  * @ingroup Media
  27  */
  28 class WikiFilePage extends WikiPage {
  29         /**
  30          * @var File
  31          */
  32         protected $mFile = false;                               // !< File object
  33         protected $mRepo = null;                            // !<
  34         protected $mFileLoaded = false;             // !<
  35         protected $mDupes = null;                               // !<
  36
  37         public function __construct( $title ) {
  38                 parent::__construct( $title );
  39                 $this->mDupes = null;
  40                 $this->mRepo = null;
  41         }
  42
  43         /**
  44          * @param File $file
  45          */
  46         public function setFile( $file ) {
  47                 $this->mFile = $file;
  48                 $this->mFileLoaded = true;
  49         }
  50
  51         /**
  52          * @return bool
  53          */
  54         protected function loadFile() {
  55                 if ( $this->mFileLoaded ) {
  56                         return true;
  57                 }
  58                 $this->mFileLoaded = true;
  59
  60                 $this->mFile = wfFindFile( $this->mTitle );
  61                 if ( !$this->mFile ) {
  62                         $this->mFile = wfLocalFile( $this->mTitle ); // always a File
  63                 }
  64                 $this->mRepo = $this->mFile->getRepo();
  65                 return true;
  66         }
  67
  68         /**
  69          * @return mixed|null|Title
  70          */
  71         public function getRedirectTarget() {
  72                 $this->loadFile();
  73                 if ( $this->mFile->isLocal() ) {
  74                         return parent::getRedirectTarget();
  75                 }
  76                 // Foreign image page
  77                 $from = $this->mFile->getRedirected();
  78                 $to = $this->mFile->getName();
  79                 if ( $from == $to ) {
  80                         return null;
  81                 }
  82                 $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
  83                 return $this->mRedirectTarget;
  84         }
  85
  86         /**
  87          * @return bool|mixed|Title
  88          */
  89         public function followRedirect() {
  90                 $this->loadFile();
  91                 if ( $this->mFile->isLocal() ) {
  92                         return parent::followRedirect();
  93                 }
  94                 $from = $this->mFile->getRedirected();
  95                 $to = $this->mFile->getName();
  96                 if ( $from == $to ) {
  97                         return false;
  98                 }
  99                 return Title::makeTitle( NS_FILE, $to );
 100         }
 101
 102         /**
 103          * @return bool
 104          */
 105         public function isRedirect() {
 106                 $this->loadFile();
 107                 if ( $this->mFile->isLocal() ) {
 108                         return parent::isRedirect();
 109                 }
 110
 111                 return (bool)$this->mFile->getRedirected();
 112         }
 113
 114         /**
 115          * @return bool
 116          */
 117         public function isLocal() {
 118                 $this->loadFile();
 119                 return $this->mFile->isLocal();
 120         }
 121
 122         /**
 123          * @return bool|File
 124          */
 125         public function getFile() {
 126                 $this->loadFile();
 127                 return $this->mFile;
 128         }
 129
 130         /**
 131          * @return array|null
 132          */
 133         public function getDuplicates() {
 134                 $this->loadFile();
 135                 if ( !is_null( $this->mDupes ) ) {
 136                         return $this->mDupes;
 137                 }
 138                 $hash = $this->mFile->getSha1();
 139                 if ( !( $hash ) ) {
 140                         $this->mDupes = array();
 141                         return $this->mDupes;
 142                 }
 143                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 144                 // Remove duplicates with self and non matching file sizes
 145                 $self = $this->mFile->getRepoName() . ':' . $this->mFile->getName();
 146                 $size = $this->mFile->getSize();
 147
 148                 /**
 149                  * @var $file File
 150                  */
 151                 foreach ( $dupes as $index => $file ) {
 152                         $key = $file->getRepoName() . ':' . $file->getName();
 153                         if ( $key == $self ) {
 154                                 unset( $dupes[$index] );
 155                         }
 156                         if ( $file->getSize() != $size ) {
 157                                 unset( $dupes[$index] );
 158                         }
 159                 }
 160                 $this->mDupes = $dupes;
 161                 return $this->mDupes;
 162         }
 163
 164         /**
 165          * Override handling of action=purge
 166          * @return bool
 167          */
 168         public function doPurge() {
 169                 $this->loadFile();
 170                 if ( $this->mFile->exists() ) {
 171                         wfDebug( 'ImagePage::doPurge purging ' . $this->mFile->getName() . "\n" );
 172                         DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this->mTitle, 'imagelinks' ) );
 173                         $this->mFile->upgradeRow();
 174                         $this->mFile->purgeCache( array( 'forThumbRefresh' => true ) );
 175                 } else {
 176                         wfDebug( 'ImagePage::doPurge no image for '
 177                                 . $this->mFile->getName() . "; limiting purge to cache only\n" );
 178                         // even if the file supposedly doesn't exist, force any cached information
 179                         // to be updated (in case the cached information is wrong)
 180                         $this->mFile->purgeCache( array( 'forThumbRefresh' => true ) );
 181                 }
 182                 if ( $this->mRepo ) {
 183                         // Purge redirect cache
 184                         $this->mRepo->invalidateImageRedirect( $this->mTitle );
 185                 }
 186                 return parent::doPurge();
 187         }
 188
 189         /**
 190          * Get the categories this file is a member of on the wiki where it was uploaded.
 191          * For local files, this is the same as getCategories().
 192          * For foreign API files (InstantCommons), this is not supported currently.
 193          * Results will include hidden categories.
 194          *
 195          * @return TitleArray|Title[]
 196          * @since 1.23
 197          */
 198         public function getForeignCategories() {
 199                 $this->loadFile();
 200                 $title = $this->mTitle;
 201                 $file = $this->mFile;
 202
 203                 if ( !$file instanceof LocalFile ) {
 204                         wfDebug( __CLASS__ . '::' . __METHOD__ . " is not supported for this file\n" );
 205                         return TitleArray::newFromResult( new FakeResultWrapper( array() ) );
 206                 }
 207
 208                 /** @var LocalRepo $repo */
 209                 $repo = $file->getRepo();
 210                 $dbr = $repo->getSlaveDB();
 211
 212                 $res = $dbr->select(
 213                         array( 'page', 'categorylinks' ),
 214                         array(
 215                                 'page_title' => 'cl_to',
 216                                 'page_namespace' => NS_CATEGORY,
 217                         ),
 218                         array(
 219                                 'page_namespace' => $title->getNamespace(),
 220                                 'page_title' => $title->getDBkey(),
 221                         ),
 222                         __METHOD__,
 223                         array(),
 224                         array( 'categorylinks' => array( 'INNER JOIN', 'page_id = cl_from' ) )
 225                 );
 226
 227                 return TitleArray::newFromResult( $res );
 228         }
 229 }