Update to MediaWiki 1.19.0

1 files changed, 156 insertions, 0 deletions

diff --git a/includes/filerepo/backend/FileBackendGroup.php b/includes/filerepo/backend/FileBackendGroup.php
new file mode 100644
index 00000000..73815cfb
--- /dev/null
+++ b/includes/filerepo/backend/FileBackendGroup.php
@@ -0,0 +1,156 @@
+<?php
+/**
+ * @file
+ * @ingroup FileBackend
+ * @author Aaron Schulz
+ */
+
+/**
+ * Class to handle file backend registration
+ *
+ * @ingroup FileBackend
+ * @since 1.19
+ */
+class FileBackendGroup {
+	/**
+	 * @var FileBackendGroup
+	 */
+	protected static $instance = null;
+
+	/** @var Array (name => ('class' => string, 'config' => array, 'instance' => object)) */
+	protected $backends = array();
+
+	protected function __construct() {}
+	protected function __clone() {}
+
+	/**
+	 * @return FileBackendGroup
+	 */
+	public static function singleton() {
+		if ( self::$instance == null ) {
+			self::$instance = new self();
+			self::$instance->initFromGlobals();
+		}
+		return self::$instance;
+	}
+
+	/**
+	 * Destroy the singleton instance
+	 * 
+	 * @return void
+	 */
+	public static function destroySingleton() {
+		self::$instance = null;
+	}
+
+	/**
+	 * Register file backends from the global variables
+	 * 
+	 * @return void
+	 */
+	protected function initFromGlobals() {
+		global $wgLocalFileRepo, $wgForeignFileRepos, $wgFileBackends;
+
+		// Register explicitly defined backends
+		$this->register( $wgFileBackends );
+
+		$autoBackends = array();
+		// Automatically create b/c backends for file repos...
+		$repos = array_merge( $wgForeignFileRepos, array( $wgLocalFileRepo ) );
+		foreach ( $repos as $info ) {
+			$backendName = $info['backend'];
+			if ( is_object( $backendName ) || isset( $this->backends[$backendName] ) ) {
+				continue; // already defined (or set to the object for some reason)
+			}
+			$repoName = $info['name'];
+			// Local vars that used to be FSRepo members...
+			$directory = $info['directory'];
+			$deletedDir = isset( $info['deletedDir'] )
+				? $info['deletedDir']
+				: false; // deletion disabled
+			$thumbDir = isset( $info['thumbDir'] )
+				? $info['thumbDir']
+				: "{$directory}/thumb";
+			$fileMode = isset( $info['fileMode'] )
+				? $info['fileMode']
+				: 0644;
+			// Get the FS backend configuration
+			$autoBackends[] = array(
+				'name'           => $backendName,
+				'class'          => 'FSFileBackend',
+				'lockManager'    => 'fsLockManager',
+				'containerPaths' => array(
+					"{$repoName}-public"  => "{$directory}",
+					"{$repoName}-thumb"   => $thumbDir,
+					"{$repoName}-deleted" => $deletedDir,
+					"{$repoName}-temp"    => "{$directory}/temp"
+				),
+				'fileMode'       => $fileMode,
+			);
+		}
+
+		// Register implicitly defined backends
+		$this->register( $autoBackends );
+	}
+
+	/**
+	 * Register an array of file backend configurations
+	 *
+	 * @param $configs Array
+	 * @return void
+	 * @throws MWException
+	 */
+	protected function register( array $configs ) {
+		foreach ( $configs as $config ) {
+			if ( !isset( $config['name'] ) ) {
+				throw new MWException( "Cannot register a backend with no name." );
+			}
+			$name = $config['name'];
+			if ( !isset( $config['class'] ) ) {
+				throw new MWException( "Cannot register backend `{$name}` with no class." );
+			}
+			$class = $config['class'];
+
+			unset( $config['class'] ); // backend won't need this
+			$this->backends[$name] = array(
+				'class'    => $class,
+				'config'   => $config,
+				'instance' => null
+			);
+		}
+	}
+
+	/**
+	 * Get the backend object with a given name
+	 *
+	 * @param $name string
+	 * @return FileBackend
+	 * @throws MWException
+	 */
+	public function get( $name ) {
+		if ( !isset( $this->backends[$name] ) ) {
+			throw new MWException( "No backend defined with the name `$name`." );
+		}
+		// Lazy-load the actual backend instance
+		if ( !isset( $this->backends[$name]['instance'] ) ) {
+			$class = $this->backends[$name]['class'];
+			$config = $this->backends[$name]['config'];
+			$this->backends[$name]['instance'] = new $class( $config );
+		}
+		return $this->backends[$name]['instance'];
+	}
+
+	/**
+	 * Get an appropriate backend object from a storage path
+	 *
+	 * @param $storagePath string
+	 * @return FileBackend|null Backend or null on failure
+	 */
+	public function backendFromPath( $storagePath ) {
+		list( $backend, $c, $p ) = FileBackend::splitStoragePath( $storagePath );
+		if ( $backend !== null && isset( $this->backends[$backend] ) ) {
+			return $this->get( $backend );
+		}
+		return null;
+	}
+}