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authorPierre Schmitz <pierre@archlinux.de>2012-05-03 13:01:35 +0200
committerPierre Schmitz <pierre@archlinux.de>2012-05-03 13:01:35 +0200
commitd9022f63880ce039446fba8364f68e656b7bf4cb (patch)
tree16b40fbf17bf7c9ee6f4ead25b16dd192378050a /includes/filerepo/file/File.php
parent27cf83d177256813e2e802241085fce5dd0f3fb9 (diff)
Update to MediaWiki 1.19.0
Diffstat (limited to 'includes/filerepo/file/File.php')
-rw-r--r--includes/filerepo/file/File.php1719
1 files changed, 1719 insertions, 0 deletions
diff --git a/includes/filerepo/file/File.php b/includes/filerepo/file/File.php
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+<?php
+/**
+ * @defgroup FileAbstraction File abstraction
+ * @ingroup FileRepo
+ *
+ * Represents files in a repository.
+ */
+
+/**
+ * Base code for files.
+ *
+ * @file
+ * @ingroup FileAbstraction
+ */
+
+/**
+ * Implements some public methods and some protected utility functions which
+ * are required by multiple child classes. Contains stub functionality for
+ * unimplemented public methods.
+ *
+ * Stub functions which should be overridden are marked with STUB. Some more
+ * concrete functions are also typically overridden by child classes.
+ *
+ * Note that only the repo object knows what its file class is called. You should
+ * never name a file class explictly outside of the repo class. Instead use the
+ * repo's factory functions to generate file objects, for example:
+ *
+ * RepoGroup::singleton()->getLocalRepo()->newFile($title);
+ *
+ * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
+ * in most cases.
+ *
+ * @ingroup FileAbstraction
+ */
+abstract class File {
+ const DELETED_FILE = 1;
+ const DELETED_COMMENT = 2;
+ const DELETED_USER = 4;
+ const DELETED_RESTRICTED = 8;
+
+ /** Force rendering in the current process */
+ const RENDER_NOW = 1;
+ /**
+ * Force rendering even if thumbnail already exist and using RENDER_NOW
+ * I.e. you have to pass both flags: File::RENDER_NOW | File::RENDER_FORCE
+ */
+ const RENDER_FORCE = 2;
+
+ const DELETE_SOURCE = 1;
+
+ /**
+ * Some member variables can be lazy-initialised using __get(). The
+ * initialisation function for these variables is always a function named
+ * like getVar(), where Var is the variable name with upper-case first
+ * letter.
+ *
+ * The following variables are initialised in this way in this base class:
+ * name, extension, handler, path, canRender, isSafeFile,
+ * transformScript, hashPath, pageCount, url
+ *
+ * Code within this class should generally use the accessor function
+ * directly, since __get() isn't re-entrant and therefore causes bugs that
+ * depend on initialisation order.
+ */
+
+ /**
+ * The following member variables are not lazy-initialised
+ */
+
+ /**
+ * @var FileRepo|false
+ */
+ var $repo;
+
+ /**
+ * @var Title|false
+ */
+ var $title;
+
+ var $lastError, $redirected, $redirectedTitle;
+
+ /**
+ * @var FSFile|false
+ */
+ protected $fsFile;
+
+ /**
+ * @var MediaHandler
+ */
+ protected $handler;
+
+ /**
+ * @var string
+ */
+ protected $url, $extension, $name, $path, $hashPath, $pageCount, $transformScript;
+
+ /**
+ * @var bool
+ */
+ protected $canRender, $isSafeFile;
+
+ /**
+ * @var string Required Repository class type
+ */
+ protected $repoClass = 'FileRepo';
+
+ /**
+ * Call this constructor from child classes.
+ *
+ * Both $title and $repo are optional, though some functions
+ * may return false or throw exceptions if they are not set.
+ * Most subclasses will want to call assertRepoDefined() here.
+ *
+ * @param $title Title|string|false
+ * @param $repo FileRepo|false
+ */
+ function __construct( $title, $repo ) {
+ if ( $title !== false ) { // subclasses may not use MW titles
+ $title = self::normalizeTitle( $title, 'exception' );
+ }
+ $this->title = $title;
+ $this->repo = $repo;
+ }
+
+ /**
+ * Given a string or Title object return either a
+ * valid Title object with namespace NS_FILE or null
+ *
+ * @param $title Title|string
+ * @param $exception string|false Use 'exception' to throw an error on bad titles
+ * @return Title|null
+ */
+ static function normalizeTitle( $title, $exception = false ) {
+ $ret = $title;
+ if ( $ret instanceof Title ) {
+ # Normalize NS_MEDIA -> NS_FILE
+ if ( $ret->getNamespace() == NS_MEDIA ) {
+ $ret = Title::makeTitleSafe( NS_FILE, $ret->getDBkey() );
+ # Sanity check the title namespace
+ } elseif ( $ret->getNamespace() !== NS_FILE ) {
+ $ret = null;
+ }
+ } else {
+ # Convert strings to Title objects
+ $ret = Title::makeTitleSafe( NS_FILE, (string)$ret );
+ }
+ if ( !$ret && $exception !== false ) {
+ throw new MWException( "`$title` is not a valid file title." );
+ }
+ return $ret;
+ }
+
+ function __get( $name ) {
+ $function = array( $this, 'get' . ucfirst( $name ) );
+ if ( !is_callable( $function ) ) {
+ return null;
+ } else {
+ $this->$name = call_user_func( $function );
+ return $this->$name;
+ }
+ }
+
+ /**
+ * Normalize a file extension to the common form, and ensure it's clean.
+ * Extensions with non-alphanumeric characters will be discarded.
+ *
+ * @param $ext string (without the .)
+ * @return string
+ */
+ static function normalizeExtension( $ext ) {
+ $lower = strtolower( $ext );
+ $squish = array(
+ 'htm' => 'html',
+ 'jpeg' => 'jpg',
+ 'mpeg' => 'mpg',
+ 'tiff' => 'tif',
+ 'ogv' => 'ogg' );
+ if( isset( $squish[$lower] ) ) {
+ return $squish[$lower];
+ } elseif( preg_match( '/^[0-9a-z]+$/', $lower ) ) {
+ return $lower;
+ } else {
+ return '';
+ }
+ }
+
+ /**
+ * Checks if file extensions are compatible
+ *
+ * @param $old File Old file
+ * @param $new string New name
+ *
+ * @return bool|null
+ */
+ static function checkExtensionCompatibility( File $old, $new ) {
+ $oldMime = $old->getMimeType();
+ $n = strrpos( $new, '.' );
+ $newExt = self::normalizeExtension( $n ? substr( $new, $n + 1 ) : '' );
+ $mimeMagic = MimeMagic::singleton();
+ return $mimeMagic->isMatchingExtension( $newExt, $oldMime );
+ }
+
+ /**
+ * Upgrade the database row if there is one
+ * Called by ImagePage
+ * STUB
+ */
+ function upgradeRow() {}
+
+ /**
+ * Split an internet media type into its two components; if not
+ * a two-part name, set the minor type to 'unknown'.
+ *
+ * @param string $mime "text/html" etc
+ * @return array ("text", "html") etc
+ */
+ public static function splitMime( $mime ) {
+ if( strpos( $mime, '/' ) !== false ) {
+ return explode( '/', $mime, 2 );
+ } else {
+ return array( $mime, 'unknown' );
+ }
+ }
+
+ /**
+ * Return the name of this file
+ *
+ * @return string
+ */
+ public function getName() {
+ if ( !isset( $this->name ) ) {
+ $this->assertRepoDefined();
+ $this->name = $this->repo->getNameFromTitle( $this->title );
+ }
+ return $this->name;
+ }
+
+ /**
+ * Get the file extension, e.g. "svg"
+ *
+ * @return string
+ */
+ function getExtension() {
+ if ( !isset( $this->extension ) ) {
+ $n = strrpos( $this->getName(), '.' );
+ $this->extension = self::normalizeExtension(
+ $n ? substr( $this->getName(), $n + 1 ) : '' );
+ }
+ return $this->extension;
+ }
+
+ /**
+ * Return the associated title object
+ *
+ * @return Title|false
+ */
+ public function getTitle() {
+ return $this->title;
+ }
+
+ /**
+ * Return the title used to find this file
+ *
+ * @return Title
+ */
+ public function getOriginalTitle() {
+ if ( $this->redirected ) {
+ return $this->getRedirectedTitle();
+ }
+ return $this->title;
+ }
+
+ /**
+ * Return the URL of the file
+ *
+ * @return string
+ */
+ public function getUrl() {
+ if ( !isset( $this->url ) ) {
+ $this->assertRepoDefined();
+ $this->url = $this->repo->getZoneUrl( 'public' ) . '/' . $this->getUrlRel();
+ }
+ return $this->url;
+ }
+
+ /**
+ * Return a fully-qualified URL to the file.
+ * Upload URL paths _may or may not_ be fully qualified, so
+ * we check. Local paths are assumed to belong on $wgServer.
+ *
+ * @return String
+ */
+ public function getFullUrl() {
+ return wfExpandUrl( $this->getUrl(), PROTO_RELATIVE );
+ }
+
+ /**
+ * @return string
+ */
+ public function getCanonicalUrl() {
+ return wfExpandUrl( $this->getUrl(), PROTO_CANONICAL );
+ }
+
+ /**
+ * @return string
+ */
+ function getViewURL() {
+ if ( $this->mustRender() ) {
+ if ( $this->canRender() ) {
+ return $this->createThumb( $this->getWidth() );
+ } else {
+ wfDebug( __METHOD__.': supposed to render ' . $this->getName() .
+ ' (' . $this->getMimeType() . "), but can't!\n" );
+ return $this->getURL(); #hm... return NULL?
+ }
+ } else {
+ return $this->getURL();
+ }
+ }
+
+ /**
+ * Return the storage path to the file. Note that this does
+ * not mean that a file actually exists under that location.
+ *
+ * This path depends on whether directory hashing is active or not,
+ * i.e. whether the files are all found in the same directory,
+ * or in hashed paths like /images/3/3c.
+ *
+ * Most callers don't check the return value, but ForeignAPIFile::getPath
+ * returns false.
+ *
+ * @return string|false
+ */
+ public function getPath() {
+ if ( !isset( $this->path ) ) {
+ $this->assertRepoDefined();
+ $this->path = $this->repo->getZonePath( 'public' ) . '/' . $this->getRel();
+ }
+ return $this->path;
+ }
+
+ /**
+ * Get an FS copy or original of this file and return the path.
+ * Returns false on failure. Callers must not alter the file.
+ * Temporary files are cleared automatically.
+ *
+ * @return string|false
+ */
+ public function getLocalRefPath() {
+ $this->assertRepoDefined();
+ if ( !isset( $this->fsFile ) ) {
+ $this->fsFile = $this->repo->getLocalReference( $this->getPath() );
+ if ( !$this->fsFile ) {
+ $this->fsFile = false; // null => false; cache negative hits
+ }
+ }
+ return ( $this->fsFile )
+ ? $this->fsFile->getPath()
+ : false;
+ }
+
+ /**
+ * Return the width of the image. Returns false if the width is unknown
+ * or undefined.
+ *
+ * STUB
+ * Overridden by LocalFile, UnregisteredLocalFile
+ *
+ * @param $page int
+ *
+ * @return number
+ */
+ public function getWidth( $page = 1 ) {
+ return false;
+ }
+
+ /**
+ * Return the height of the image. Returns false if the height is unknown
+ * or undefined
+ *
+ * STUB
+ * Overridden by LocalFile, UnregisteredLocalFile
+ *
+ * @param $page int
+ *
+ * @return false|number
+ */
+ public function getHeight( $page = 1 ) {
+ return false;
+ }
+
+ /**
+ * Returns ID or name of user who uploaded the file
+ * STUB
+ *
+ * @param $type string 'text' or 'id'
+ *
+ * @return string|int
+ */
+ public function getUser( $type = 'text' ) {
+ return null;
+ }
+
+ /**
+ * Get the duration of a media file in seconds
+ *
+ * @return number
+ */
+ public function getLength() {
+ $handler = $this->getHandler();
+ if ( $handler ) {
+ return $handler->getLength( $this );
+ } else {
+ return 0;
+ }
+ }
+
+ /**
+ * Return true if the file is vectorized
+ *
+ * @return bool
+ */
+ public function isVectorized() {
+ $handler = $this->getHandler();
+ if ( $handler ) {
+ return $handler->isVectorized( $this );
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Get handler-specific metadata
+ * Overridden by LocalFile, UnregisteredLocalFile
+ * STUB
+ */
+ public function getMetadata() {
+ return false;
+ }
+
+ /**
+ * get versioned metadata
+ *
+ * @param $metadata Mixed Array or String of (serialized) metadata
+ * @param $version integer version number.
+ * @return Array containing metadata, or what was passed to it on fail (unserializing if not array)
+ */
+ public function convertMetadataVersion($metadata, $version) {
+ $handler = $this->getHandler();
+ if ( !is_array( $metadata ) ) {
+ // Just to make the return type consistent
+ $metadata = unserialize( $metadata );
+ }
+ if ( $handler ) {
+ return $handler->convertMetadataVersion( $metadata, $version );
+ } else {
+ return $metadata;
+ }
+ }
+
+ /**
+ * Return the bit depth of the file
+ * Overridden by LocalFile
+ * STUB
+ */
+ public function getBitDepth() {
+ return 0;
+ }
+
+ /**
+ * Return the size of the image file, in bytes
+ * Overridden by LocalFile, UnregisteredLocalFile
+ * STUB
+ */
+ public function getSize() {
+ return false;
+ }
+
+ /**
+ * Returns the mime type of the file.
+ * Overridden by LocalFile, UnregisteredLocalFile
+ * STUB
+ *
+ * @return string
+ */
+ function getMimeType() {
+ return 'unknown/unknown';
+ }
+
+ /**
+ * Return the type of the media in the file.
+ * Use the value returned by this function with the MEDIATYPE_xxx constants.
+ * Overridden by LocalFile,
+ * STUB
+ */
+ function getMediaType() {
+ return MEDIATYPE_UNKNOWN;
+ }
+
+ /**
+ * Checks if the output of transform() for this file is likely
+ * to be valid. If this is false, various user elements will
+ * display a placeholder instead.
+ *
+ * Currently, this checks if the file is an image format
+ * that can be converted to a format
+ * supported by all browsers (namely GIF, PNG and JPEG),
+ * or if it is an SVG image and SVG conversion is enabled.
+ *
+ * @return bool
+ */
+ function canRender() {
+ if ( !isset( $this->canRender ) ) {
+ $this->canRender = $this->getHandler() && $this->handler->canRender( $this );
+ }
+ return $this->canRender;
+ }
+
+ /**
+ * Accessor for __get()
+ */
+ protected function getCanRender() {
+ return $this->canRender();
+ }
+
+ /**
+ * Return true if the file is of a type that can't be directly
+ * rendered by typical browsers and needs to be re-rasterized.
+ *
+ * This returns true for everything but the bitmap types
+ * supported by all browsers, i.e. JPEG; GIF and PNG. It will
+ * also return true for any non-image formats.
+ *
+ * @return bool
+ */
+ function mustRender() {
+ return $this->getHandler() && $this->handler->mustRender( $this );
+ }
+
+ /**
+ * Alias for canRender()
+ *
+ * @return bool
+ */
+ function allowInlineDisplay() {
+ return $this->canRender();
+ }
+
+ /**
+ * Determines if this media file is in a format that is unlikely to
+ * contain viruses or malicious content. It uses the global
+ * $wgTrustedMediaFormats list to determine if the file is safe.
+ *
+ * This is used to show a warning on the description page of non-safe files.
+ * It may also be used to disallow direct [[media:...]] links to such files.
+ *
+ * Note that this function will always return true if allowInlineDisplay()
+ * or isTrustedFile() is true for this file.
+ *
+ * @return bool
+ */
+ function isSafeFile() {
+ if ( !isset( $this->isSafeFile ) ) {
+ $this->isSafeFile = $this->_getIsSafeFile();
+ }
+ return $this->isSafeFile;
+ }
+
+ /**
+ * Accessor for __get()
+ *
+ * @return bool
+ */
+ protected function getIsSafeFile() {
+ return $this->isSafeFile();
+ }
+
+ /**
+ * Uncached accessor
+ *
+ * @return bool
+ */
+ protected function _getIsSafeFile() {
+ global $wgTrustedMediaFormats;
+
+ if ( $this->allowInlineDisplay() ) {
+ return true;
+ }
+ if ($this->isTrustedFile()) {
+ return true;
+ }
+
+ $type = $this->getMediaType();
+ $mime = $this->getMimeType();
+ #wfDebug("LocalFile::isSafeFile: type= $type, mime= $mime\n");
+
+ if ( !$type || $type === MEDIATYPE_UNKNOWN ) {
+ return false; #unknown type, not trusted
+ }
+ if ( in_array( $type, $wgTrustedMediaFormats ) ) {
+ return true;
+ }
+
+ if ( $mime === "unknown/unknown" ) {
+ return false; #unknown type, not trusted
+ }
+ if ( in_array( $mime, $wgTrustedMediaFormats) ) {
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * Returns true if the file is flagged as trusted. Files flagged that way
+ * can be linked to directly, even if that is not allowed for this type of
+ * file normally.
+ *
+ * This is a dummy function right now and always returns false. It could be
+ * implemented to extract a flag from the database. The trusted flag could be
+ * set on upload, if the user has sufficient privileges, to bypass script-
+ * and html-filters. It may even be coupled with cryptographics signatures
+ * or such.
+ *
+ * @return bool
+ */
+ function isTrustedFile() {
+ #this could be implemented to check a flag in the database,
+ #look for signatures, etc
+ return false;
+ }
+
+ /**
+ * Returns true if file exists in the repository.
+ *
+ * Overridden by LocalFile to avoid unnecessary stat calls.
+ *
+ * @return boolean Whether file exists in the repository.
+ */
+ public function exists() {
+ return $this->getPath() && $this->repo->fileExists( $this->path );
+ }
+
+ /**
+ * Returns true if file exists in the repository and can be included in a page.
+ * It would be unsafe to include private images, making public thumbnails inadvertently
+ *
+ * @return boolean Whether file exists in the repository and is includable.
+ */
+ public function isVisible() {
+ return $this->exists();
+ }
+
+ /**
+ * @return string
+ */
+ function getTransformScript() {
+ if ( !isset( $this->transformScript ) ) {
+ $this->transformScript = false;
+ if ( $this->repo ) {
+ $script = $this->repo->getThumbScriptUrl();
+ if ( $script ) {
+ $this->transformScript = "$script?f=" . urlencode( $this->getName() );
+ }
+ }
+ }
+ return $this->transformScript;
+ }
+
+ /**
+ * Get a ThumbnailImage which is the same size as the source
+ *
+ * @param $handlerParams array
+ *
+ * @return string
+ */
+ function getUnscaledThumb( $handlerParams = array() ) {
+ $hp =& $handlerParams;
+ $page = isset( $hp['page'] ) ? $hp['page'] : false;
+ $width = $this->getWidth( $page );
+ if ( !$width ) {
+ return $this->iconThumb();
+ }
+ $hp['width'] = $width;
+ return $this->transform( $hp );
+ }
+
+ /**
+ * Return the file name of a thumbnail with the specified parameters
+ *
+ * @param $params Array: handler-specific parameters
+ * @private -ish
+ *
+ * @return string
+ */
+ function thumbName( $params ) {
+ return $this->generateThumbName( $this->getName(), $params );
+ }
+
+ /**
+ * Generate a thumbnail file name from a name and specified parameters
+ *
+ * @param string $name
+ * @param array $params Parameters which will be passed to MediaHandler::makeParamString
+ *
+ * @return string
+ */
+ function generateThumbName( $name, $params ) {
+ if ( !$this->getHandler() ) {
+ return null;
+ }
+ $extension = $this->getExtension();
+ list( $thumbExt, $thumbMime ) = $this->handler->getThumbType(
+ $extension, $this->getMimeType(), $params );
+ $thumbName = $this->handler->makeParamString( $params ) . '-' . $name;
+ if ( $thumbExt != $extension ) {
+ $thumbName .= ".$thumbExt";
+ }
+ return $thumbName;
+ }
+
+ /**
+ * Create a thumbnail of the image having the specified width/height.
+ * The thumbnail will not be created if the width is larger than the
+ * image's width. Let the browser do the scaling in this case.
+ * The thumbnail is stored on disk and is only computed if the thumbnail
+ * file does not exist OR if it is older than the image.
+ * Returns the URL.
+ *
+ * Keeps aspect ratio of original image. If both width and height are
+ * specified, the generated image will be no bigger than width x height,
+ * and will also have correct aspect ratio.
+ *
+ * @param $width Integer: maximum width of the generated thumbnail
+ * @param $height Integer: maximum height of the image (optional)
+ *
+ * @return string
+ */
+ public function createThumb( $width, $height = -1 ) {
+ $params = array( 'width' => $width );
+ if ( $height != -1 ) {
+ $params['height'] = $height;
+ }
+ $thumb = $this->transform( $params );
+ if ( is_null( $thumb ) || $thumb->isError() ) {
+ return '';
+ }
+ return $thumb->getUrl();
+ }
+
+ /**
+ * Return either a MediaTransformError or placeholder thumbnail (if $wgIgnoreImageErrors)
+ *
+ * @param $thumbPath string Thumbnail storage path
+ * @param $thumbUrl string Thumbnail URL
+ * @param $params Array
+ * @param $flags integer
+ * @return MediaTransformOutput
+ */
+ protected function transformErrorOutput( $thumbPath, $thumbUrl, $params, $flags ) {
+ global $wgIgnoreImageErrors;
+
+ if ( $wgIgnoreImageErrors && !( $flags & self::RENDER_NOW ) ) {
+ return $this->handler->getTransform( $this, $thumbPath, $thumbUrl, $params );
+ } else {
+ return new MediaTransformError( 'thumbnail_error',
+ $params['width'], 0, wfMsg( 'thumbnail-dest-create' ) );
+ }
+ }
+
+ /**
+ * Transform a media file
+ *
+ * @param $params Array: an associative array of handler-specific parameters.
+ * Typical keys are width, height and page.
+ * @param $flags Integer: a bitfield, may contain self::RENDER_NOW to force rendering
+ * @return MediaTransformOutput|false
+ */
+ function transform( $params, $flags = 0 ) {
+ global $wgUseSquid, $wgIgnoreImageErrors, $wgThumbnailEpoch;
+
+ wfProfileIn( __METHOD__ );
+ do {
+ if ( !$this->canRender() ) {
+ $thumb = $this->iconThumb();
+ break; // not a bitmap or renderable image, don't try
+ }
+
+ // Get the descriptionUrl to embed it as comment into the thumbnail. Bug 19791.
+ $descriptionUrl = $this->getDescriptionUrl();
+ if ( $descriptionUrl ) {
+ $params['descriptionUrl'] = wfExpandUrl( $descriptionUrl, PROTO_CANONICAL );
+ }
+
+ $script = $this->getTransformScript();
+ if ( $script && !( $flags & self::RENDER_NOW ) ) {
+ // Use a script to transform on client request, if possible
+ $thumb = $this->handler->getScriptedTransform( $this, $script, $params );
+ if ( $thumb ) {
+ break;
+ }
+ }
+
+ $normalisedParams = $params;
+ $this->handler->normaliseParams( $this, $normalisedParams );
+
+ $thumbName = $this->thumbName( $normalisedParams );
+ $thumbUrl = $this->getThumbUrl( $thumbName );
+ $thumbPath = $this->getThumbPath( $thumbName ); // final thumb path
+
+ if ( $this->repo ) {
+ // Defer rendering if a 404 handler is set up...
+ if ( $this->repo->canTransformVia404() && !( $flags & self::RENDER_NOW ) ) {
+ wfDebug( __METHOD__ . " transformation deferred." );
+ // XXX: Pass in the storage path even though we are not rendering anything
+ // and the path is supposed to be an FS path. This is due to getScalerType()
+ // getting called on the path and clobbering $thumb->getUrl() if it's false.
+ $thumb = $this->handler->getTransform( $this, $thumbPath, $thumbUrl, $params );
+ break;
+ }
+ // Clean up broken thumbnails as needed
+ $this->migrateThumbFile( $thumbName );
+ // Check if an up-to-date thumbnail already exists...
+ wfDebug( __METHOD__.": Doing stat for $thumbPath\n" );
+ if ( $this->repo->fileExists( $thumbPath ) && !( $flags & self::RENDER_FORCE ) ) {
+ $timestamp = $this->repo->getFileTimestamp( $thumbPath );
+ if ( $timestamp !== false && $timestamp >= $wgThumbnailEpoch ) {
+ // XXX: Pass in the storage path even though we are not rendering anything
+ // and the path is supposed to be an FS path. This is due to getScalerType()
+ // getting called on the path and clobbering $thumb->getUrl() if it's false.
+ $thumb = $this->handler->getTransform( $this, $thumbPath, $thumbUrl, $params );
+ $thumb->setStoragePath( $thumbPath );
+ break;
+ }
+ } elseif ( $flags & self::RENDER_FORCE ) {
+ wfDebug( __METHOD__ . " forcing rendering per flag File::RENDER_FORCE\n" );
+ }
+ }
+
+ // Create a temp FS file with the same extension and the thumbnail
+ $thumbExt = FileBackend::extensionFromPath( $thumbPath );
+ $tmpFile = TempFSFile::factory( 'transform_', $thumbExt );
+ if ( !$tmpFile ) {
+ $thumb = $this->transformErrorOutput( $thumbPath, $thumbUrl, $params, $flags );
+ break;
+ }
+ $tmpThumbPath = $tmpFile->getPath(); // path of 0-byte temp file
+
+ // Actually render the thumbnail...
+ $thumb = $this->handler->doTransform( $this, $tmpThumbPath, $thumbUrl, $params );
+ $tmpFile->bind( $thumb ); // keep alive with $thumb
+
+ if ( !$thumb ) { // bad params?
+ $thumb = null;
+ } elseif ( $thumb->isError() ) { // transform error
+ $this->lastError = $thumb->toText();
+ // Ignore errors if requested
+ if ( $wgIgnoreImageErrors && !( $flags & self::RENDER_NOW ) ) {
+ $thumb = $this->handler->getTransform( $this, $tmpThumbPath, $thumbUrl, $params );
+ }
+ } elseif ( $this->repo && $thumb->hasFile() && !$thumb->fileIsSource() ) {
+ $backend = $this->repo->getBackend();
+ // Copy the thumbnail from the file system into storage. This avoids using
+ // FileRepo::store(); getThumbPath() uses a different zone in some subclasses.
+ $backend->prepare( array( 'dir' => dirname( $thumbPath ) ) );
+ $status = $backend->store(
+ array( 'src' => $tmpThumbPath, 'dst' => $thumbPath, 'overwrite' => 1 ),
+ array( 'force' => 1, 'nonLocking' => 1, 'allowStale' => 1 )
+ );
+ if ( $status->isOK() ) {
+ $thumb->setStoragePath( $thumbPath );
+ } else {
+ $thumb = $this->transformErrorOutput( $thumbPath, $thumbUrl, $params, $flags );
+ }
+ }
+
+ // Purge. Useful in the event of Core -> Squid connection failure or squid
+ // purge collisions from elsewhere during failure. Don't keep triggering for
+ // "thumbs" which have the main image URL though (bug 13776)
+ if ( $wgUseSquid ) {
+ if ( !$thumb || $thumb->isError() || $thumb->getUrl() != $this->getURL() ) {
+ SquidUpdate::purge( array( $thumbUrl ) );
+ }
+ }
+ } while ( false );
+
+ wfProfileOut( __METHOD__ );
+ return is_object( $thumb ) ? $thumb : false;
+ }
+
+ /**
+ * Hook into transform() to allow migration of thumbnail files
+ * STUB
+ * Overridden by LocalFile
+ */
+ function migrateThumbFile( $thumbName ) {}
+
+ /**
+ * Get a MediaHandler instance for this file
+ *
+ * @return MediaHandler
+ */
+ function getHandler() {
+ if ( !isset( $this->handler ) ) {
+ $this->handler = MediaHandler::getHandler( $this->getMimeType() );
+ }
+ return $this->handler;
+ }
+
+ /**
+ * Get a ThumbnailImage representing a file type icon
+ *
+ * @return ThumbnailImage
+ */
+ function iconThumb() {
+ global $wgStylePath, $wgStyleDirectory;
+
+ $try = array( 'fileicon-' . $this->getExtension() . '.png', 'fileicon.png' );
+ foreach ( $try as $icon ) {
+ $path = '/common/images/icons/' . $icon;
+ $filepath = $wgStyleDirectory . $path;
+ if ( file_exists( $filepath ) ) { // always FS
+ return new ThumbnailImage( $this, $wgStylePath . $path, 120, 120 );
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Get last thumbnailing error.
+ * Largely obsolete.
+ */
+ function getLastError() {
+ return $this->lastError;
+ }
+
+ /**
+ * Get all thumbnail names previously generated for this file
+ * STUB
+ * Overridden by LocalFile
+ */
+ function getThumbnails() {
+ return array();
+ }
+
+ /**
+ * Purge shared caches such as thumbnails and DB data caching
+ * STUB
+ * Overridden by LocalFile
+ * @param $options Array Options, which include:
+ * 'forThumbRefresh' : The purging is only to refresh thumbnails
+ */
+ function purgeCache( $options = array() ) {}
+
+ /**
+ * Purge the file description page, but don't go after
+ * pages using the file. Use when modifying file history
+ * but not the current data.
+ */
+ function purgeDescription() {
+ $title = $this->getTitle();
+ if ( $title ) {
+ $title->invalidateCache();
+ $title->purgeSquid();
+ }
+ }
+
+ /**
+ * Purge metadata and all affected pages when the file is created,
+ * deleted, or majorly updated.
+ */
+ function purgeEverything() {
+ // Delete thumbnails and refresh file metadata cache
+ $this->purgeCache();
+ $this->purgeDescription();
+
+ // Purge cache of all pages using this file
+ $title = $this->getTitle();
+ if ( $title ) {
+ $update = new HTMLCacheUpdate( $title, 'imagelinks' );
+ $update->doUpdate();
+ }
+ }
+
+ /**
+ * Return a fragment of the history of file.
+ *
+ * STUB
+ * @param $limit integer Limit of rows to return
+ * @param $start timestamp Only revisions older than $start will be returned
+ * @param $end timestamp Only revisions newer than $end will be returned
+ * @param $inc bool Include the endpoints of the time range
+ *
+ * @return array
+ */
+ function getHistory($limit = null, $start = null, $end = null, $inc=true) {
+ return array();
+ }
+
+ /**
+ * Return the history of this file, line by line. Starts with current version,
+ * then old versions. Should return an object similar to an image/oldimage
+ * database row.
+ *
+ * STUB
+ * Overridden in LocalFile
+ */
+ public function nextHistoryLine() {
+ return false;
+ }
+
+ /**
+ * Reset the history pointer to the first element of the history.
+ * Always call this function after using nextHistoryLine() to free db resources
+ * STUB
+ * Overridden in LocalFile.
+ */
+ public function resetHistory() {}
+
+ /**
+ * Get the filename hash component of the directory including trailing slash,
+ * e.g. f/fa/
+ * If the repository is not hashed, returns an empty string.
+ *
+ * @return string
+ */
+ function getHashPath() {
+ if ( !isset( $this->hashPath ) ) {
+ $this->assertRepoDefined();
+ $this->hashPath = $this->repo->getHashPath( $this->getName() );
+ }
+ return $this->hashPath;
+ }
+
+ /**
+ * Get the path of the file relative to the public zone root.
+ * This function is overriden in OldLocalFile to be like getArchiveRel().
+ *
+ * @return string
+ */
+ function getRel() {
+ return $this->getHashPath() . $this->getName();
+ }
+
+ /**
+ * Get the path of an archived file relative to the public zone root
+ *
+ * @param $suffix bool|string if not false, the name of an archived thumbnail file
+ *
+ * @return string
+ */
+ function getArchiveRel( $suffix = false ) {
+ $path = 'archive/' . $this->getHashPath();
+ if ( $suffix === false ) {
+ $path = substr( $path, 0, -1 );
+ } else {
+ $path .= $suffix;
+ }
+ return $path;
+ }
+
+ /**
+ * Get the path, relative to the thumbnail zone root, of the
+ * thumbnail directory or a particular file if $suffix is specified
+ *
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getThumbRel( $suffix = false ) {
+ $path = $this->getRel();
+ if ( $suffix !== false ) {
+ $path .= '/' . $suffix;
+ }
+ return $path;
+ }
+
+ /**
+ * Get urlencoded path of the file relative to the public zone root.
+ * This function is overriden in OldLocalFile to be like getArchiveUrl().
+ *
+ * @return string
+ */
+ function getUrlRel() {
+ return $this->getHashPath() . rawurlencode( $this->getName() );
+ }
+
+ /**
+ * Get the path, relative to the thumbnail zone root, for an archived file's thumbs directory
+ * or a specific thumb if the $suffix is given.
+ *
+ * @param $archiveName string the timestamped name of an archived image
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getArchiveThumbRel( $archiveName, $suffix = false ) {
+ $path = 'archive/' . $this->getHashPath() . $archiveName . "/";
+ if ( $suffix === false ) {
+ $path = substr( $path, 0, -1 );
+ } else {
+ $path .= $suffix;
+ }
+ return $path;
+ }
+
+ /**
+ * Get the path of the archived file.
+ *
+ * @param $suffix bool|string if not false, the name of an archived file.
+ *
+ * @return string
+ */
+ function getArchivePath( $suffix = false ) {
+ $this->assertRepoDefined();
+ return $this->repo->getZonePath( 'public' ) . '/' . $this->getArchiveRel( $suffix );
+ }
+
+ /**
+ * Get the path of an archived file's thumbs, or a particular thumb if $suffix is specified
+ *
+ * @param $archiveName string the timestamped name of an archived image
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getArchiveThumbPath( $archiveName, $suffix = false ) {
+ $this->assertRepoDefined();
+ return $this->repo->getZonePath( 'thumb' ) . '/' .
+ $this->getArchiveThumbRel( $archiveName, $suffix );
+ }
+
+ /**
+ * Get the path of the thumbnail directory, or a particular file if $suffix is specified
+ *
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getThumbPath( $suffix = false ) {
+ $this->assertRepoDefined();
+ return $this->repo->getZonePath( 'thumb' ) . '/' . $this->getThumbRel( $suffix );
+ }
+
+ /**
+ * Get the URL of the archive directory, or a particular file if $suffix is specified
+ *
+ * @param $suffix bool|string if not false, the name of an archived file
+ *
+ * @return string
+ */
+ function getArchiveUrl( $suffix = false ) {
+ $this->assertRepoDefined();
+ $path = $this->repo->getZoneUrl( 'public' ) . '/archive/' . $this->getHashPath();
+ if ( $suffix === false ) {
+ $path = substr( $path, 0, -1 );
+ } else {
+ $path .= rawurlencode( $suffix );
+ }
+ return $path;
+ }
+
+ /**
+ * Get the URL of the archived file's thumbs, or a particular thumb if $suffix is specified
+ *
+ * @param $archiveName string the timestamped name of an archived image
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getArchiveThumbUrl( $archiveName, $suffix = false ) {
+ $this->assertRepoDefined();
+ $path = $this->repo->getZoneUrl( 'thumb' ) . '/archive/' .
+ $this->getHashPath() . rawurlencode( $archiveName ) . "/";
+ if ( $suffix === false ) {
+ $path = substr( $path, 0, -1 );
+ } else {
+ $path .= rawurlencode( $suffix );
+ }
+ return $path;
+ }
+
+ /**
+ * Get the URL of the thumbnail directory, or a particular file if $suffix is specified
+ *
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return path
+ */
+ function getThumbUrl( $suffix = false ) {
+ $this->assertRepoDefined();
+ $path = $this->repo->getZoneUrl( 'thumb' ) . '/' . $this->getUrlRel();
+ if ( $suffix !== false ) {
+ $path .= '/' . rawurlencode( $suffix );
+ }
+ return $path;
+ }
+
+ /**
+ * Get the public zone virtual URL for a current version source file
+ *
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getVirtualUrl( $suffix = false ) {
+ $this->assertRepoDefined();
+ $path = $this->repo->getVirtualUrl() . '/public/' . $this->getUrlRel();
+ if ( $suffix !== false ) {
+ $path .= '/' . rawurlencode( $suffix );
+ }
+ return $path;
+ }
+
+ /**
+ * Get the public zone virtual URL for an archived version source file
+ *
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getArchiveVirtualUrl( $suffix = false ) {
+ $this->assertRepoDefined();
+ $path = $this->repo->getVirtualUrl() . '/public/archive/' . $this->getHashPath();
+ if ( $suffix === false ) {
+ $path = substr( $path, 0, -1 );
+ } else {
+ $path .= rawurlencode( $suffix );
+ }
+ return $path;
+ }
+
+ /**
+ * Get the virtual URL for a thumbnail file or directory
+ *
+ * @param $suffix bool|string if not false, the name of a thumbnail file
+ *
+ * @return string
+ */
+ function getThumbVirtualUrl( $suffix = false ) {
+ $this->assertRepoDefined();
+ $path = $this->repo->getVirtualUrl() . '/thumb/' . $this->getUrlRel();
+ if ( $suffix !== false ) {
+ $path .= '/' . rawurlencode( $suffix );
+ }
+ return $path;
+ }
+
+ /**
+ * @return bool
+ */
+ function isHashed() {
+ $this->assertRepoDefined();
+ return $this->repo->isHashed();
+ }
+
+ /**
+ * @throws MWException
+ */
+ function readOnlyError() {
+ throw new MWException( get_class($this) . ': write operations are not supported' );
+ }
+
+ /**
+ * Record a file upload in the upload log and the image table
+ * STUB
+ * Overridden by LocalFile
+ * @param $oldver
+ * @param $desc
+ * @param $license string
+ * @param $copyStatus string
+ * @param $source string
+ * @param $watch bool
+ */
+ function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '', $watch = false ) {
+ $this->readOnlyError();
+ }
+
+ /**
+ * Move or copy a file to its public location. If a file exists at the
+ * destination, move it to an archive. Returns a FileRepoStatus object with
+ * the archive name in the "value" member on success.
+ *
+ * The archive name should be passed through to recordUpload for database
+ * registration.
+ *
+ * @param $srcPath String: local filesystem path to the source image
+ * @param $flags Integer: a bitwise combination of:
+ * File::DELETE_SOURCE Delete the source file, i.e. move
+ * rather than copy
+ * @return FileRepoStatus object. On success, the value member contains the
+ * archive name, or an empty string if it was a new file.
+ *
+ * STUB
+ * Overridden by LocalFile
+ */
+ function publish( $srcPath, $flags = 0 ) {
+ $this->readOnlyError();
+ }
+
+ /**
+ * @return bool
+ */
+ function formatMetadata() {
+ if ( !$this->getHandler() ) {
+ return false;
+ }
+ return $this->getHandler()->formatMetadata( $this, $this->getMetadata() );
+ }
+
+ /**
+ * Returns true if the file comes from the local file repository.
+ *
+ * @return bool
+ */
+ function isLocal() {
+ return $this->repo && $this->repo->isLocal();
+ }
+
+ /**
+ * Returns the name of the repository.
+ *
+ * @return string
+ */
+ function getRepoName() {
+ return $this->repo ? $this->repo->getName() : 'unknown';
+ }
+
+ /**
+ * Returns the repository
+ *
+ * @return FileRepo|false
+ */
+ function getRepo() {
+ return $this->repo;
+ }
+
+ /**
+ * Returns true if the image is an old version
+ * STUB
+ *
+ * @return bool
+ */
+ function isOld() {
+ return false;
+ }
+
+ /**
+ * Is this file a "deleted" file in a private archive?
+ * STUB
+ *
+ * @param $field
+ *
+ * @return bool
+ */
+ function isDeleted( $field ) {
+ return false;
+ }
+
+ /**
+ * Return the deletion bitfield
+ * STUB
+ */
+ function getVisibility() {
+ return 0;
+ }
+
+ /**
+ * Was this file ever deleted from the wiki?
+ *
+ * @return bool
+ */
+ function wasDeleted() {
+ $title = $this->getTitle();
+ return $title && $title->isDeletedQuick();
+ }
+
+ /**
+ * Move file to the new title
+ *
+ * Move current, old version and all thumbnails
+ * to the new filename. Old file is deleted.
+ *
+ * Cache purging is done; checks for validity
+ * and logging are caller's responsibility
+ *
+ * @param $target Title New file name
+ * @return FileRepoStatus object.
+ */
+ function move( $target ) {
+ $this->readOnlyError();
+ }
+
+ /**
+ * Delete all versions of the file.
+ *
+ * Moves the files into an archive directory (or deletes them)
+ * and removes the database rows.
+ *
+ * Cache purging is done; logging is caller's responsibility.
+ *
+ * @param $reason String
+ * @param $suppress Boolean: hide content from sysops?
+ * @return true on success, false on some kind of failure
+ * STUB
+ * Overridden by LocalFile
+ */
+ function delete( $reason, $suppress = false ) {
+ $this->readOnlyError();
+ }
+
+ /**
+ * Restore all or specified deleted revisions to the given file.
+ * Permissions and logging are left to the caller.
+ *
+ * May throw database exceptions on error.
+ *
+ * @param $versions array set of record ids of deleted items to restore,
+ * or empty to restore all revisions.
+ * @param $unsuppress bool remove restrictions on content upon restoration?
+ * @return int|false the number of file revisions restored if successful,
+ * or false on failure
+ * STUB
+ * Overridden by LocalFile
+ */
+ function restore( $versions = array(), $unsuppress = false ) {
+ $this->readOnlyError();
+ }
+
+ /**
+ * Returns 'true' if this file is a type which supports multiple pages,
+ * e.g. DJVU or PDF. Note that this may be true even if the file in
+ * question only has a single page.
+ *
+ * @return Bool
+ */
+ function isMultipage() {
+ return $this->getHandler() && $this->handler->isMultiPage( $this );
+ }
+
+ /**
+ * Returns the number of pages of a multipage document, or false for
+ * documents which aren't multipage documents
+ *
+ * @return false|int
+ */
+ function pageCount() {
+ if ( !isset( $this->pageCount ) ) {
+ if ( $this->getHandler() && $this->handler->isMultiPage( $this ) ) {
+ $this->pageCount = $this->handler->pageCount( $this );
+ } else {
+ $this->pageCount = false;
+ }
+ }
+ return $this->pageCount;
+ }
+
+ /**
+ * Calculate the height of a thumbnail using the source and destination width
+ *
+ * @param $srcWidth
+ * @param $srcHeight
+ * @param $dstWidth
+ *
+ * @return int
+ */
+ static function scaleHeight( $srcWidth, $srcHeight, $dstWidth ) {
+ // Exact integer multiply followed by division
+ if ( $srcWidth == 0 ) {
+ return 0;
+ } else {
+ return round( $srcHeight * $dstWidth / $srcWidth );
+ }
+ }
+
+ /**
+ * Get an image size array like that returned by getImageSize(), or false if it
+ * can't be determined.
+ *
+ * @param $fileName String: The filename
+ * @return Array
+ */
+ function getImageSize( $fileName ) {
+ if ( !$this->getHandler() ) {
+ return false;
+ }
+ return $this->handler->getImageSize( $this, $fileName );
+ }
+
+ /**
+ * Get the URL of the image description page. May return false if it is
+ * unknown or not applicable.
+ *
+ * @return string
+ */
+ function getDescriptionUrl() {
+ if ( $this->repo ) {
+ return $this->repo->getDescriptionUrl( $this->getName() );
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Get the HTML text of the description page, if available
+ *
+ * @return string
+ */
+ function getDescriptionText() {
+ global $wgMemc, $wgLang;
+ if ( !$this->repo || !$this->repo->fetchDescription ) {
+ return false;
+ }
+ $renderUrl = $this->repo->getDescriptionRenderUrl( $this->getName(), $wgLang->getCode() );
+ if ( $renderUrl ) {
+ if ( $this->repo->descriptionCacheExpiry > 0 ) {
+ wfDebug("Attempting to get the description from cache...");
+ $key = $this->repo->getLocalCacheKey( 'RemoteFileDescription', 'url', $wgLang->getCode(),
+ $this->getName() );
+ $obj = $wgMemc->get($key);
+ if ($obj) {
+ wfDebug("success!\n");
+ return $obj;
+ }
+ wfDebug("miss\n");
+ }
+ wfDebug( "Fetching shared description from $renderUrl\n" );
+ $res = Http::get( $renderUrl );
+ if ( $res && $this->repo->descriptionCacheExpiry > 0 ) {
+ $wgMemc->set( $key, $res, $this->repo->descriptionCacheExpiry );
+ }
+ return $res;
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Get discription of file revision
+ * STUB
+ *
+ * @return string
+ */
+ function getDescription() {
+ return null;
+ }
+
+ /**
+ * Get the 14-character timestamp of the file upload
+ *
+ * @return string|false TS_MW timestamp or false on failure
+ */
+ function getTimestamp() {
+ $this->assertRepoDefined();
+ return $this->repo->getFileTimestamp( $this->getPath() );
+ }
+
+ /**
+ * Get the SHA-1 base 36 hash of the file
+ *
+ * @return string
+ */
+ function getSha1() {
+ $this->assertRepoDefined();
+ return $this->repo->getFileSha1( $this->getPath() );
+ }
+
+ /**
+ * Get the deletion archive key, <sha1>.<ext>
+ *
+ * @return string
+ */
+ function getStorageKey() {
+ $hash = $this->getSha1();
+ if ( !$hash ) {
+ return false;
+ }
+ $ext = $this->getExtension();
+ $dotExt = $ext === '' ? '' : ".$ext";
+ return $hash . $dotExt;
+ }
+
+ /**
+ * Determine if the current user is allowed to view a particular
+ * field of this file, if it's marked as deleted.
+ * STUB
+ * @param $field Integer
+ * @param $user User object to check, or null to use $wgUser
+ * @return Boolean
+ */
+ function userCan( $field, User $user = null ) {
+ return true;
+ }
+
+ /**
+ * Get an associative array containing information about a file in the local filesystem.
+ *
+ * @param $path String: absolute local filesystem path
+ * @param $ext Mixed: the file extension, or true to extract it from the filename.
+ * Set it to false to ignore the extension.
+ *
+ * @return array
+ */
+ static function getPropsFromPath( $path, $ext = true ) {
+ wfDebug( __METHOD__.": Getting file info for $path\n" );
+ wfDeprecated( __METHOD__, '1.19' );
+
+ $fsFile = new FSFile( $path );
+ return $fsFile->getProps();
+ }
+
+ /**
+ * Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case
+ * encoding, zero padded to 31 digits.
+ *
+ * 160 log 2 / log 36 = 30.95, so the 160-bit hash fills 31 digits in base 36
+ * fairly neatly.
+ *
+ * @param $path string
+ *
+ * @return false|string False on failure
+ */
+ static function sha1Base36( $path ) {
+ wfDeprecated( __METHOD__, '1.19' );
+
+ $fsFile = new FSFile( $path );
+ return $fsFile->getSha1Base36();
+ }
+
+ /**
+ * @return string
+ */
+ function getLongDesc() {
+ $handler = $this->getHandler();
+ if ( $handler ) {
+ return $handler->getLongDesc( $this );
+ } else {
+ return MediaHandler::getGeneralLongDesc( $this );
+ }
+ }
+
+ /**
+ * @return string
+ */
+ function getShortDesc() {
+ $handler = $this->getHandler();
+ if ( $handler ) {
+ return $handler->getShortDesc( $this );
+ } else {
+ return MediaHandler::getGeneralShortDesc( $this );
+ }
+ }
+
+ /**
+ * @return string
+ */
+ function getDimensionsString() {
+ $handler = $this->getHandler();
+ if ( $handler ) {
+ return $handler->getDimensionsString( $this );
+ } else {
+ return '';
+ }
+ }
+
+ /**
+ * @return
+ */
+ function getRedirected() {
+ return $this->redirected;
+ }
+
+ /**
+ * @return Title
+ */
+ function getRedirectedTitle() {
+ if ( $this->redirected ) {
+ if ( !$this->redirectTitle ) {
+ $this->redirectTitle = Title::makeTitle( NS_FILE, $this->redirected );
+ }
+ return $this->redirectTitle;
+ }
+ }
+
+ /**
+ * @param $from
+ * @return void
+ */
+ function redirectedFrom( $from ) {
+ $this->redirected = $from;
+ }
+
+ /**
+ * @return bool
+ */
+ function isMissing() {
+ return false;
+ }
+
+ /**
+ * Assert that $this->repo is set to a valid FileRepo instance
+ * @throws MWException
+ */
+ protected function assertRepoDefined() {
+ if ( !( $this->repo instanceof $this->repoClass ) ) {
+ throw new MWException( "A {$this->repoClass} object is not set for this File.\n" );
+ }
+ }
+
+ /**
+ * Assert that $this->title is set to a Title
+ * @throws MWException
+ */
+ protected function assertTitleDefined() {
+ if ( !( $this->title instanceof Title ) ) {
+ throw new MWException( "A Title object is not set for this File.\n" );
+ }
+ }
+}