includes/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         public function getActionOverrides() {
  44                 $overrides = parent::getActionOverrides();
  45                 $overrides['revert'] = 'RevertFileAction';
  46                 return $overrides;
  47         }
  48
  49         /**
  50          * @param File $file
  51          */
  52         public function setFile( $file ) {
  53                 $this->mFile = $file;
  54                 $this->mFileLoaded = true;
  55         }
  56
  57         /**
  58          * @return bool
  59          */
  60         protected function loadFile() {
  61                 if ( $this->mFileLoaded ) {
  62                         return true;
  63                 }
  64                 $this->mFileLoaded = true;
  65
  66                 $this->mFile = wfFindFile( $this->mTitle );
  67                 if ( !$this->mFile ) {
  68                         $this->mFile = wfLocalFile( $this->mTitle ); // always a File
  69                 }
  70                 $this->mRepo = $this->mFile->getRepo();
  71                 return true;
  72         }
  73
  74         /**
  75          * @return mixed|null|Title
  76          */
  77         public function getRedirectTarget() {
  78                 $this->loadFile();
  79                 if ( $this->mFile->isLocal() ) {
  80                         return parent::getRedirectTarget();
  81                 }
  82                 // Foreign image page
  83                 $from = $this->mFile->getRedirected();
  84                 $to = $this->mFile->getName();
  85                 if ( $from == $to ) {
  86                         return null;
  87                 }
  88                 $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
  89                 return $this->mRedirectTarget;
  90         }
  91
  92         /**
  93          * @return bool|mixed|Title
  94          */
  95         public function followRedirect() {
  96                 $this->loadFile();
  97                 if ( $this->mFile->isLocal() ) {
  98                         return parent::followRedirect();
  99                 }
 100                 $from = $this->mFile->getRedirected();
 101                 $to = $this->mFile->getName();
 102                 if ( $from == $to ) {
 103                         return false;
 104                 }
 105                 return Title::makeTitle( NS_FILE, $to );
 106         }
 107
 108         /**
 109          * @return bool
 110          */
 111         public function isRedirect() {
 112                 $this->loadFile();
 113                 if ( $this->mFile->isLocal() ) {
 114                         return parent::isRedirect();
 115                 }
 116
 117                 return (bool)$this->mFile->getRedirected();
 118         }
 119
 120         /**
 121          * @return bool
 122          */
 123         public function isLocal() {
 124                 $this->loadFile();
 125                 return $this->mFile->isLocal();
 126         }
 127
 128         /**
 129          * @return bool|File
 130          */
 131         public function getFile() {
 132                 $this->loadFile();
 133                 return $this->mFile;
 134         }
 135
 136         /**
 137          * @return array|null
 138          */
 139         public function getDuplicates() {
 140                 $this->loadFile();
 141                 if ( !is_null( $this->mDupes ) ) {
 142                         return $this->mDupes;
 143                 }
 144                 $hash = $this->mFile->getSha1();
 145                 if ( !( $hash ) ) {
 146                         $this->mDupes = array();
 147                         return $this->mDupes;
 148                 }
 149                 $dupes = RepoGroup::singleton()->findBySha1( $hash );
 150                 // Remove duplicates with self and non matching file sizes
 151                 $self = $this->mFile->getRepoName() . ':' . $this->mFile->getName();
 152                 $size = $this->mFile->getSize();
 153
 154                 /**
 155                  * @var $file File
 156                  */
 157                 foreach ( $dupes as $index => $file ) {
 158                         $key = $file->getRepoName() . ':' . $file->getName();
 159                         if ( $key == $self ) {
 160                                 unset( $dupes[$index] );
 161                         }
 162                         if ( $file->getSize() != $size ) {
 163                                 unset( $dupes[$index] );
 164                         }
 165                 }
 166                 $this->mDupes = $dupes;
 167                 return $this->mDupes;
 168         }
 169
 170         /**
 171          * Override handling of action=purge
 172          * @return bool
 173          */
 174         public function doPurge() {
 175                 $this->loadFile();
 176                 if ( $this->mFile->exists() ) {
 177                         wfDebug( 'ImagePage::doPurge purging ' . $this->mFile->getName() . "\n" );
 178                         $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
 179                         $update->doUpdate();
 180                         $this->mFile->upgradeRow();
 181                         $this->mFile->purgeCache( array( 'forThumbRefresh' => true ) );
 182                 } else {
 183                         wfDebug( 'ImagePage::doPurge no image for ' . $this->mFile->getName() . "; limiting purge to cache only\n" );
 184                         // even if the file supposedly doesn't exist, force any cached information
 185                         // to be updated (in case the cached information is wrong)
 186                         $this->mFile->purgeCache( array( 'forThumbRefresh' => true ) );
 187                 }
 188                 if ( $this->mRepo ) {
 189                         // Purge redirect cache
 190                         $this->mRepo->invalidateImageRedirect( $this->mTitle );
 191                 }
 192                 return parent::doPurge();
 193         }
 194
 195         /**
 196          * Get the categories this file is a member of on the wiki where it was uploaded.
 197          * For local files, this is the same as getCategories().
 198          * For foreign API files (InstantCommons), this is not supported currently.
 199          * Results will include hidden categories.
 200          *
 201          * @return TitleArray|Title[]
 202          * @since 1.23
 203          */
 204         public function getForeignCategories() {
 205                 $this->loadFile();
 206                 $title = $this->mTitle;
 207                 $file = $this->mFile;
 208
 209                 if ( ! $file instanceof LocalFile ) {
 210                         wfDebug( __CLASS__ . '::' . __METHOD__ . " is not supported for this file\n" );
 211                         return TitleArray::newFromResult( new FakeResultWrapper( array() ) );
 212                 }
 213
 214                 /** @var LocalRepo $repo */
 215                 $repo = $file->getRepo();
 216                 $dbr = $repo->getSlaveDB();
 217
 218                 $res = $dbr->select(
 219                         array( 'page', 'categorylinks' ),
 220                         array(
 221                                 'page_title' => 'cl_to',
 222                                 'page_namespace' => NS_CATEGORY,
 223                         ),
 224                         array(
 225                                 'page_namespace' => $title->getNamespace(),
 226                                 'page_title' => $title->getDBkey(),
 227                         ),
 228                         __METHOD__,
 229                         array(),
 230                         array( 'categorylinks' => array( 'INNER JOIN', 'page_id = cl_from' ) )
 231                 );
 232
 233                 return TitleArray::newFromResult( $res );
 234         }
 235 }