* @link http://www.pradosoft.com/ * @copyright Copyright © 2005 PradoSoft * @license http://www.pradosoft.com/license/ * @version $Revision: $ $Date: $ * @package System */ /** * The framework installation path. */ define('PRADO_DIR',dirname(__FILE__)); /** * Includes TComponent definition */ require_once(PRADO_DIR.'/TComponent.php'); /** * Includes exception definitions */ require_once(PRADO_DIR.'/Exceptions/TException.php'); /** * Includes TList definition */ require_once(PRADO_DIR.'/Collections/TList.php'); /** * Includes TMap definition */ require_once(PRADO_DIR.'/Collections/TMap.php'); /** * Includes TXmlDocument, TXmlElement definition */ require_once(PRADO_DIR.'/Data/TXmlDocument.php'); /** * IModule interface. * * This interface must be implemented by application modules. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface IModule { /** * Initializes the module. * @param TApplication the application object * @param TXmlElement the configuration for the module */ public function init($application,$configuration); /** * @return string ID of the module */ public function getID(); /** * @param string ID of the module */ public function setID($id); } /** * IService interface. * * This interface must be implemented by services. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface IService { /** * Initializes the service. * @param TApplication the application object * @param TXmlElement the configuration for the service */ public function init($application,$configuration); /** * @return string ID of the service */ public function getID(); /** * @param string ID of the service */ public function setID($id); /** * Runs the service. */ public function run(); } /** * ICache interface. * * This interface must be implemented by cache managers. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface ICache { /** * Retrieves a value from cache with a specified key. * @return mixed the value stored in cache, false if the value is not in the cache or expired. */ public function get($id); /** * Stores a value identified by a key into cache. * If the cache already contains such a key, the existing value and * expiration time will be replaced with the new ones. * * @param string the key identifying the value to be cached * @param mixed the value to be cached * @param integer the expiration time of the value, * 0 means never expire, * a number less or equal than 60*60*24*30 means the number of seconds that the value will remain valid. * a number greater than 60 means a UNIX timestamp after which the value will expire. * @return boolean true if the value is successfully stored into cache, false otherwise */ public function set($id,$value,$expire=0); /** * Stores a value identified by a key into cache if the cache does not contain this key. * Nothing will be done if the cache already contains the key. * @param string the key identifying the value to be cached * @param mixed the value to be cached * @param integer the expiration time of the value, * 0 means never expire, * a number less or equal than 60*60*24*30 means the number of seconds that the value will remain valid. * a number greater than 60 means a UNIX timestamp after which the value will expire. * @return boolean true if the value is successfully stored into cache, false otherwise */ public function add($id,$value,$expire=0); /** * Stores a value identified by a key into cache only if the cache contains this key. * The existing value and expiration time will be overwritten with the new ones. * @param string the key identifying the value to be cached * @param mixed the value to be cached * @param integer the expiration time of the value, * 0 means never expire, * a number less or equal than 60*60*24*30 means the number of seconds that the value will remain valid. * a number greater than 60 means a UNIX timestamp after which the value will expire. * @return boolean true if the value is successfully stored into cache, false otherwise */ public function replace($id,$value,$expire=0); /** * Deletes a value with the specified key from cache * @param string the key of the value to be deleted * @return boolean if no error happens during deletion */ public function delete($id); /** * Deletes all values from cache. * Be careful of performing this operation if the cache is shared by multiple applications. */ public function flush(); } /** * ITextWriter interface. * * This interface must be implemented by writers. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface ITextWriter { /** * Writes a string. * @param string string to be written */ public function write($str); /** * Flushes the content that has been written. */ public function flush(); } /** * ITheme interface. * * This interface must be implemented by theme. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface ITheme { /** * Applies this theme to the specified control. * @param TControl the control to be applied with this theme */ public function apply($control); } /** * ITemplate interface * * ITemplate specifies the interface for classes encapsulating * parsed template structures. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface ITemplate { /** * Instantiates the template. * Content in the template will be instantiated as components and text strings * and passed to the specified parent control. * @param TControl the parent control */ public function instantiateIn($parent); } /** * IUser interface. * * This interface must be implemented by user objects. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ interface IUser { /** * @return string username */ public function getName(); /** * @param string username */ public function setName($value); /** * @return boolean if the user is a guest */ public function getIsGuest(); /** * @param boolean if the user is a guest */ public function setIsGuest($value); /** * @return array list of roles that the user is of */ public function getRoles(); /** * @return array|string list of roles that the user is of. If it is a string, roles are assumed by separated by comma */ public function setRoles($value); /** * @param string role to be tested * @return boolean whether the user is of this role */ public function isInRole($role); /** * @return string user data that is serialized and will be stored in session */ public function saveToString(); /** * @param string user data that is serialized and restored from session * @return IUser the user object */ public function loadFromString($string); } /** * PradoBase class. * * PradoBase implements a few fundamental static methods. * * To use the static methods, Use Prado as the class name rather than PradoBase. * PradoBase is meant to serve as the base class of Prado. The latter might be * rewritten for customization. * * @author Qiang Xue * @version $Revision: $ $Date: $ * @package System * @since 3.0 */ class PradoBase { /** * File extension for Prado class files. */ const CLASS_FILE_EXT='.php'; /** * @var array list of path aliases */ private static $_aliases=array('System'=>PRADO_DIR); /** * @var array list of namespaces currently in use */ private static $_usings=array(); /** * @var TApplication the application instance */ private static $_application=null; /** * @return string the version of Prado framework */ public static function getVersion() { return '3.0a'; } /** * PHP error handler. * This method should be registered as PHP error handler using * {@link set_error_handler}. The method throws an exception that * contains the error information. * @param integer the level of the error raised * @param string the error message * @param string the filename that the error was raised in * @param integer the line number the error was raised at */ public static function phpErrorHandler($errno,$errstr,$errfile,$errline) { if(error_reporting()!=0) throw new TPhpErrorException($errno,$errstr,$errfile,$errline); } /** * Default exception handler. * This method should be registered as default exception handler using * {@link set_exception_handler}. The method tries to use the errorhandler * module of the Prado application to handle the exception. * If the application or the module does not exist, it simply echoes the * exception. * @param Exception exception that is not caught */ public static function exceptionHandler($exception) { if(self::$_application!==null && ($errorHandler=self::$_application->getErrorHandler())!==null) { $errorHandler->handleError($exception); } else { echo $exception; } exit(1); } /** * Stores the application instance in the class static member. * This method helps implement a singleton pattern for TApplication. * Repeated invocation of this method or the application constructor * will cause the throw of an exception. * This method should only be used by framework developers. * @param TApplication the application instance * @throws TInvalidOperationException if this method is invoked twice or more. */ public static function setApplication($application) { if(self::$_application!==null) throw new TInvalidOperationException('prado_application_singleton_required'); self::$_application=$application; } /** * @return TApplication the application singleton, null if the singleton has not be created yet. */ public static function getApplication() { return self::$_application; } /** * @return string the path of the framework */ public static function getFrameworkPath() { return PRADO_DIR; } /** * Serializes a data. * Original PHP serialize function has a bug that may not serialize * properly an object. * @param mixed data to be serialized * @return string the serialized data */ public static function serialize($data) { $arr[0]=$data; return serialize($arr); } /** * Unserializes a data. * Original PHP unserialize function has a bug that may not unserialize * properly an object. * @param string data to be unserialized * @return mixed unserialized data, null if unserialize failed */ public static function unserialize($str) { $arr=unserialize($str); return isset($arr[0])?$arr[0]:null; } /** * Creates a component with the specified type. * A component type can be either the component class name * or a namespace referring to the path of the component class file. * For example, 'TButton', 'System.Web.UI.WebControls.TButton' are both * valid component type. * @param string component type * @return TComponent component instance of the specified type * @throws TInvalidDataValueException if the component type is unknown */ public static function createComponent($type) { if(class_exists($type,false)) return new $type; if(($pos=strrpos($type,'.'))===false) { include_once($type.self::CLASS_FILE_EXT); if(class_exists($type,false)) return new $type; } else { $className=substr($type,$pos+1); if(class_exists($className,false)) return new $className; else if(($path=self::getPathOfNamespace($type))!==null) { include_once($path.self::CLASS_FILE_EXT); if(class_exists($className,false)) return new $className; } } throw new TInvalidDataValueException('prado_component_unknown',$type); } /** * Uses a namespace. * A namespace ending with an asterisk '*' refers to a directory, otherwise it represents a PHP file. * If the namespace corresponds to a directory, the directory will be appended * to the include path. If the namespace corresponds to a file, it will be included (require_once). * @param string namespace to be used * @throws TInvalidDataValueException if the namespace is invalid */ public static function using($namespace) { if(!isset(self::$_usings[$namespace])) { if(($path=self::getPathOfNamespace($namespace,self::CLASS_FILE_EXT))===null) throw new TInvalidDataValueException('prado_using_invalid',$namespace); else { if($namespace[strlen($namespace)-1]==='*') // a directory { if(is_dir($path)) { self::$_usings[$namespace]=$path; set_include_path(get_include_path().PATH_SEPARATOR.$path); } else throw new TInvalidDataValueException('prado_using_invalid',$namespace); } else // a file { if(is_file($path)) { self::$_usings[$namespace]=$path; require_once($path); } else throw new TInvalidDataValueException('prado_using_invalid',$namespace); } } } } /** * Translates a namespace into a file path. * The first segment of the namespace is considered as a path alias * which is replaced with the actual path. The rest segments are * subdirectory names appended to the aliased path. * If the namespace ends with an asterisk '*', it represents a directory; * Otherwise it represents a file whose extension name is specified by the second parameter (defaults to empty). * Note, this method does not ensure the existence of the resulting file path. * @param string namespace * @param string extension to be appended if the namespace refers to a file * @return string file path corresponding to the namespace, null if namespace is invalid */ public static function getPathOfNamespace($namespace,$ext='') { if(isset(self::$_usings[$namespace])) return self::$_usings[$namespace]; else if(isset(self::$_aliases[$namespace])) return self::$_aliases[$namespace]; else { $segs=explode('.',$namespace); $alias=array_shift($segs); if(($file=array_pop($segs))!==null && ($root=self::getPathOfAlias($alias))!==null) return rtrim($root.'/'.implode('/',$segs),'/').(($file==='*')?'':'/'.$file.$ext); else return null; } } /** * @param string alias to the path * @return string the path corresponding to the alias, null if alias not defined. */ public static function getPathOfAlias($alias) { if(isset(self::$_aliases[$alias])) return self::$_aliases[$alias]; else return null; } /** * @param string alias to the path * @param string the path corresponding to the alias * @throws TInvalidOperationException if the alias is already defined * @throws TInvalidDataValueException if the path is not a valid file path */ public static function setPathOfAlias($alias,$path) { if(isset(self::$_aliases[$alias])) throw new TInvalidOperationException('prado_alias_redefined',$alias); else if(($rp=realpath($path))!==false && is_dir($rp)) self::$_aliases[$alias]=$rp; else throw new TInvalidDataValueException('prado_alias_invalid',$alias,$path); } /** * Fatal error handler. * This method displays an error message together with the current call stack. * The application will exit after calling this method. * @param string error message */ public static function fatalError($msg) { echo '

Fatal Error

'; echo '

'.$msg.'

'; if(!function_exists('debug_backtrace')) return; echo '

Debug Backtrace

'; echo '
';
		$index=-1;
		foreach(debug_backtrace() as $t)
		{
			$index++;
			if($index==0)  // hide the backtrace of this function
				continue;
			echo '#'.$index.' ';
			if(isset($t['file']))
				echo basename($t['file']) . ':' . $t['line'];
			else
			   echo '';
			echo ' -- ';
			if(isset($t['class']))
				echo $t['class'] . $t['type'];
			echo $t['function'];
			if(isset($t['args']) && sizeof($t['args']) > 0)
				echo '(...)';
			else
				echo '()';
			echo "\n";
		}
		echo '
'; exit(1); } /** * Returns a list of user preferred languages. * The languages are returned as an array. Each array element * represents a single language preference. The languages are ordered * according to user preferences. The first language is the most preferred. * @return array list of user preferred languages. */ public static function getUserLanguages() { static $languages=null; if($languages===null) { $languages=array(); foreach(explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']) as $language) { $array=split(';q=',trim($language)); $languages[trim($array[0])]=isset($array[1])?(float)$array[1]:1.0; } arsort($languages); $languages=array_keys($languages); if(empty($languages)) $languages[0]='en'; } return $languages; } /** * Returns the most preferred language by the client user. * @return string the most preferred language by the client user, defaults to English. */ public static function getPreferredLanguage() { static $language=null; if($language===null) { $langs=Prado::getUserLanguages(); $lang=explode('-',$langs[0]); if(empty($lang[0]) || !ctype_alpha($lang[0])) $language='en'; else $language=$lang[0]; } return $language; } } ?>