Библиотека для cis, online, cms1

PHPTAL/TalesRegistry.php

@@ -0,0 +1,109 @@
+<?php
+/* vim: set expandtab tabstop=4 shiftwidth=4: */
+//
+//  Copyright (c) 2004-2005 Laurent Bedubourg
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  Authors: Moritz Bechler <mbechler@eenterphace.org>
+//
+
+require_once PHPTAL_DIR.'PHPTAL/Tales.php';
+
+/**
+ * Global registry of TALES expression modifiers
+ *
+ */
+class PHPTAL_TalesRegistry {
+
+	static $instance;
+
+	static public function initialize() {
+		self::$instance = new PHPTAL_TalesRegistry();
+	}
+
+	/**
+	 * Enter description here...
+	 *
+	 * @return PHPTAL_TalesRegistry
+	 */
+	static public function getInstance() {
+		if(!(self::$instance instanceof PHPTAL_TalesRegistry)) {
+			self::initialize();
+		}
+
+		return self::$instance;
+	}
+
+	protected function __construct() {
+
+	}
+
+	/**
+	 *
+	 * Expects an either a function name or an array of class and method as
+	 * callback.
+	 *
+	 * @param unknown_type $prefix
+	 * @param unknown_type $callback
+	 */
+	public function registerPrefix($prefix, $callback) {
+		if($this->isRegistered($prefix)) {
+			throw new PHPTAL_Exception(sprintf('Expression modifier "%s" is already registered.',$prefix));
+		}
+
+		// Check if valid callback
+
+		if(is_array($callback)) {
+
+			$class = new ReflectionClass($callback[0]);
+
+			if(!$class->isSubclassOf('PHPTAL_Tales')) {
+				throw new PHPTAL_Exception('The class you want to register does not implement "PHPTAL_Tales".');
+			}
+
+			$method = new ReflectionMethod($callback[0], $callback[1]);
+
+			if(!$method->isStatic()) {
+				throw new PHPTAL_Exception('The method you want to register is not static.');
+			}
+
+			// maybe we want to check the parameters the method takes
+
+		} else {
+			if(!function_exists($callback)) {
+				throw new PHPTAL_Exception('The function you are trying to register does not exist.');
+			}
+		}
+
+
+		$this->_callbacks[$prefix] = $callback;
+	}
+
+	public function isRegistered($prefix) {
+		return (array_key_exists($prefix, $this->_callbacks));
+	}
+
+	public function getCallback($prefix) {
+		if(!$this->isRegistered($prefix)) {
+			throw new PHPTAL_Exception(sprintf('Expression modifier "%s" is not registered.', $prefix));
+		}
+		return $this->_callbacks[$prefix];
+	}
+
+	private $_callbacks = array();
+}
+
+?>