WikiFilePage.php

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<?php
class WikiFilePage extends WikiPage {
        protected $mFile = false;                               // !< File object
        protected $mRepo = null;                            // !<
        protected $mFileLoaded = false;             // !<
        protected $mDupes = null;                               // !<

        public function __construct( $title ) {
                parent::__construct( $title );
                $this->mDupes = null;
                $this->mRepo = null;
        }

        public function getActionOverrides() {
                $overrides = parent::getActionOverrides();
                $overrides['revert'] = 'RevertFileAction';
                return $overrides;
        }

        public function setFile( $file ) {
                $this->mFile = $file;
                $this->mFileLoaded = true;
        }

        protected function loadFile() {
                if ( $this->mFileLoaded ) {
                        return true;
                }
                $this->mFileLoaded = true;

                $this->mFile = wfFindFile( $this->mTitle );
                if ( !$this->mFile ) {
                        $this->mFile = wfLocalFile( $this->mTitle ); // always a File
                }
                $this->mRepo = $this->mFile->getRepo();
                return true;
        }

        public function getRedirectTarget() {
                $this->loadFile();
                if ( $this->mFile->isLocal() ) {
                        return parent::getRedirectTarget();
                }
                // Foreign image page
                $from = $this->mFile->getRedirected();
                $to = $this->mFile->getName();
                if ( $from == $to ) {
                        return null;
                }
                return $this->mRedirectTarget = Title::makeTitle( NS_FILE, $to );
        }

        public function followRedirect() {
                $this->loadFile();
                if ( $this->mFile->isLocal() ) {
                        return parent::followRedirect();
                }
                $from = $this->mFile->getRedirected();
                $to = $this->mFile->getName();
                if ( $from == $to ) {
                        return false;
                }
                return Title::makeTitle( NS_FILE, $to );
        }

        public function isRedirect() {
                $this->loadFile();
                if ( $this->mFile->isLocal() ) {
                        return parent::isRedirect();
                }

                return (bool)$this->mFile->getRedirected();
        }

        public function isLocal() {
                $this->loadFile();
                return $this->mFile->isLocal();
        }

        public function getFile() {
                $this->loadFile();
                return $this->mFile;
        }

        public function getDuplicates() {
                $this->loadFile();
                if ( !is_null( $this->mDupes ) ) {
                        return $this->mDupes;
                }
                $hash = $this->mFile->getSha1();
                if ( !( $hash ) ) {
                        return $this->mDupes = array();
                }
                $dupes = RepoGroup::singleton()->findBySha1( $hash );
                // Remove duplicates with self and non matching file sizes
                $self = $this->mFile->getRepoName() . ':' . $this->mFile->getName();
                $size = $this->mFile->getSize();

                foreach ( $dupes as $index => $file ) {
                        $key = $file->getRepoName() . ':' . $file->getName();
                        if ( $key == $self ) {
                                unset( $dupes[$index] );
                        }
                        if ( $file->getSize() != $size ) {
                                unset( $dupes[$index] );
                        }
                }
                $this->mDupes = $dupes;
                return $this->mDupes;
        }

        public function doPurge() {
                $this->loadFile();
                if ( $this->mFile->exists() ) {
                        wfDebug( 'ImagePage::doPurge purging ' . $this->mFile->getName() . "\n" );
                        $update = new HTMLCacheUpdate( $this->mTitle, 'imagelinks' );
                        $update->doUpdate();
                        $this->mFile->upgradeRow();
                        $this->mFile->purgeCache( array( 'forThumbRefresh' => true ) );
                } else {
                        wfDebug( 'ImagePage::doPurge no image for ' . $this->mFile->getName() . "; limiting purge to cache only\n" );
                        // even if the file supposedly doesn't exist, force any cached information
                        // to be updated (in case the cached information is wrong)
                        $this->mFile->purgeCache( array( 'forThumbRefresh' => true ) );
                }
                return parent::doPurge();
        }
}