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