<?php
/**
* Application class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
use Yii;
use yii\base\InvalidCallException;
use yii\util\StringHelper;
/**
* Application is the base class for all application classes.
*
* An application serves as the global context that the user request
* is being processed. It manages a set of application components that
* provide specific functionalities to the whole application.
*
* The core application components provided by Application are the following:
* < ul >
* < li > {@link getErrorHandler errorHandler}: handles PHP errors and
* uncaught exceptions. This application component is dynamically loaded when needed.< / li >
* < li > {@link getSecurityManager securityManager}: provides security-related
* services, such as hashing, encryption. This application component is dynamically
* loaded when needed.< / li >
* < li > {@link getStatePersister statePersister}: provides global state
* persistence method. This application component is dynamically loaded when needed.< / li >
* < li > {@link getCache cache}: provides caching feature. This application component is
* disabled by default.< / li >
* < li > {@link getMessages messages}: provides the message source for translating
* application messages. This application component is dynamically loaded when needed.< / li >
* < li > {@link getCoreMessages coreMessages}: provides the message source for translating
* Yii framework messages. This application component is dynamically loaded when needed.< / li >
* < / ul >
*
* Application will undergo the following lifecycles when processing a user request:
* < ol >
* < li > load application configuration;< / li >
* < li > set up class autoloader and error handling;< / li >
* < li > load static application components;< / li >
* < li > {@link beforeRequest}: preprocess the user request; `beforeRequest` event raised.< / li >
* < li > {@link processRequest}: process the user request;< / li >
* < li > {@link afterRequest}: postprocess the user request; `afterRequest` event raised.< / li >
* < / ol >
*
* Starting from lifecycle 3, if a PHP error or an uncaught exception occurs,
* the application will switch to its error handling logic and jump to step 6 afterwards.
*
* @property string $basePath Returns the root path of the application.
* @property CCache $cache Returns the cache component.
* @property CPhpMessageSource $coreMessages Returns the core message translations.
* @property CDateFormatter $dateFormatter Returns the locale-dependent date formatter.
* @property \yii\db\Connection $db Returns the database connection component.
* @property CErrorHandler $errorHandler Returns the error handler component.
* @property string $extensionPath Returns the root directory that holds all third-party extensions.
* @property string $id Returns the unique identifier for the application.
* @property string $language Returns the language that the user is using and the application should be targeted to.
* @property CLocale $locale Returns the locale instance.
* @property string $localeDataPath Returns the directory that contains the locale data.
* @property CMessageSource $messages Returns the application message translations component.
* @property CNumberFormatter $numberFormatter The locale-dependent number formatter.
* @property CHttpRequest $request Returns the request component.
* @property string $runtimePath Returns the directory that stores runtime files.
* @property CSecurityManager $securityManager Returns the security manager component.
* @property CStatePersister $statePersister Returns the state persister component.
* @property string $timeZone Returns the time zone used by this application.
* @property UrlManager $urlManager Returns the URL manager component.
* @property string $baseUrl Returns the relative URL for the application
* @property string $homeUrl the homepage URL
*
* @author Qiang Xue < qiang.xue @ gmail . com >
* @since 2.0
*/
class Application extends Module
{
const EVENT_BEFORE_REQUEST = 'beforeRequest';
const EVENT_AFTER_REQUEST = 'afterRequest';
/**
* @var string the application name. Defaults to 'My Application'.
*/
public $name = 'My Application';
/**
* @var string the version of this application. Defaults to '1.0'.
*/
public $version = '1.0';
/**
* @var string the charset currently used for the application. Defaults to 'UTF-8'.
*/
public $charset = 'UTF-8';
/**
* @var string the language that the application is written in. This mainly refers to
* the language that the messages and view files are in. Defaults to 'en_us' (US English).
* @see language
*/
public $sourceLanguage = 'en_us';
/**
* @var array IDs of application components that need to be loaded when the application starts.
* The default value is `array('errorHandler')`, which loads the [[errorHandler]] component
* to ensure errors and exceptions can be handled nicely.
*/
public $preload = array('errorHandler');
/**
* @var Controller the currently active controller instance
*/
public $controller;
/**
* @var mixed the layout that should be applied for views in this application. Defaults to 'main'.
* If this is false, layout will be disabled.
*/
public $layout = 'main';
// todo
public $localeDataPath = '@yii/i18n/data';
private $_runtimePath;
private $_ended = false;
private $_language;
/**
* Constructor.
* @param string $id the ID of this application. The ID should uniquely identify the application from others.
* @param string $basePath the base path of this application. This should point to
* the directory containing all application logic, template and data.
* @param array $config name-value pairs that will be used to initialize the object properties
*/
public function __construct($id, $basePath, $config = array())
{
Yii::$application = $this;
$this->id = $id;
$this->setBasePath($basePath);
$this->registerDefaultAliases();
$this->registerCoreComponents();
parent::__construct($id, $this, $config);
}
/**
* Initializes the application by loading components declared in [[preload]].
* If you override this method, make sure the parent implementation is invoked.
*/
public function init()
{
$this->preloadComponents();
}
/**
* Terminates the application.
* This method replaces PHP's exit() function by calling [[afterRequest()]] before exiting.
* @param integer $status exit status (value 0 means normal exit while other values mean abnormal exit).
* @param boolean $exit whether to exit the current request.
* It defaults to true, meaning the PHP's exit() function will be called at the end of this method.
*/
public function end($status = 0, $exit = true)
{
if (!$this->_ended) {
$this->_ended = true;
$this->afterRequest();
}
if ($exit) {
exit($status);
}
}
/**
* Runs the application.
* This is the main entrance of an application.
* @return integer the exit status (0 means normal, non-zero values mean abnormal)
*/
public function run()
{
$this->beforeRequest();
$status = $this->processRequest();
$this->afterRequest();
return $status;
}
/**
* Raises the [[EVENT_BEFORE_REQUEST]] event right BEFORE the application processes the request.
*/
public function beforeRequest()
{
$this->trigger(self::EVENT_BEFORE_REQUEST);
}
/**
* Raises the [[EVENT_AFTER_REQUEST]] event right AFTER the application processes the request.
*/
public function afterRequest()
{
$this->trigger(self::EVENT_AFTER_REQUEST);
}
/**
* Processes the request.
* Child classes should override this method with actual request processing logic.
* @return integer the exit status of the controller action (0 means normal, non-zero values mean abnormal)
*/
public function processRequest()
{
return 0;
}
/**
* Runs a controller with the given route and parameters.
* @param string $route the route (e.g. `post/create`)
* @param array $params the parameters to be passed to the controller action
* @return integer the exit status (0 means normal, non-zero values mean abnormal)
* @throws InvalidRequestException if the route cannot be resolved into a controller
*/
public function runController($route, $params = array())
{
$result = $this->createController($route);
if ($result === false) {
throw new InvalidRequestException(Yii::t('yii', 'Unable to resolve the request.'));
}
$priorController = $this->controller;
$this->controller = $controllerObject;
$status = $controllerObject->run($action, $params);
$this->controller = $priorController;
return $status;
}
/**
* Returns the directory that stores runtime files.
* @return string the directory that stores runtime files. Defaults to 'protected/runtime'.
*/
public function getRuntimePath()
{
if ($this->_runtimePath !== null) {
$this->setRuntimePath($this->getBasePath() . DIRECTORY_SEPARATOR . 'runtime');
}
return $this->_runtimePath;
}
/**
* Sets the directory that stores runtime files.
* @param string $path the directory that stores runtime files.
* @throws InvalidCallException if the directory does not exist or is not writable
*/
public function setRuntimePath($path)
{
$p = Yii::getAlias($path);
if ($p === false || !is_dir($p) || !is_writable($path)) {
throw new InvalidCallException("Application runtime path \"$path\" is invalid. Please make sure it is a directory writable by the Web server process.");
} else {
$this->_runtimePath = $p;
}
}
/**
* Returns the language that the end user is using.
* @return string the language that the user is using (e.g. 'en_US', 'zh_CN').
* Defaults to the value of [[sourceLanguage]].
*/
public function getLanguage()
{
return $this->_language === null ? $this->sourceLanguage : $this->_language;
}
/**
* Specifies which language the end user is using.
* This is the language that the application should use to display to end users.
* By default, [[language]] and [[sourceLanguage]] are the same.
* Do not set this property unless your application needs to support multiple languages.
* @param string $language the user language (e.g. 'en_US', 'zh_CN').
* If it is null, the [[sourceLanguage]] will be used.
*/
public function setLanguage($language)
{
$this->_language = $language;
}
/**
* Returns the time zone used by this application.
* This is a simple wrapper of PHP function date_default_timezone_get().
* @return string the time zone used by this application.
* @see http://php.net/manual/en/function.date-default-timezone-get.php
*/
public function getTimeZone()
{
return date_default_timezone_get();
}
/**
* Sets the time zone used by this application.
* This is a simple wrapper of PHP function date_default_timezone_set().
* @param string $value the time zone used by this application.
* @see http://php.net/manual/en/function.date-default-timezone-set.php
*/
public function setTimeZone($value)
{
date_default_timezone_set($value);
}
/**
* Returns the locale instance.
* @param string $localeID the locale ID (e.g. en_US). If null, the {@link getLanguage application language ID} will be used.
* @return CLocale the locale instance
*/
public function getLocale($localeID = null)
{
return CLocale::getInstance($localeID === null ? $this->getLanguage() : $localeID);
}
/**
* @return CNumberFormatter the locale-dependent number formatter.
* The current {@link getLocale application locale} will be used.
*/
public function getNumberFormatter()
{
return $this->getLocale()->getNumberFormatter();
}
/**
* Returns the locale-dependent date formatter.
* @return CDateFormatter the locale-dependent date formatter.
* The current {@link getLocale application locale} will be used.
*/
public function getDateFormatter()
{
return $this->getLocale()->getDateFormatter();
}
/**
* Returns the database connection component.
* @return \yii\db\Connection the database connection
*/
public function getDb()
{
return $this->getComponent('db');
}
/**
* Returns the error handler component.
* @return ErrorHandler the error handler application component.
*/
public function getErrorHandler()
{
return $this->getComponent('errorHandler');
}
/**
* Returns the application theme.
* @return Theme the theme that this application is currently using.
*/
public function getTheme()
{
return $this->getComponent('theme');
}
/**
* Returns the security manager component.
* @return SecurityManager the security manager application component.
*/
public function getSecurityManager()
{
return $this->getComponent('securityManager');
}
/**
* Returns the cache component.
* @return \yii\caching\Cache the cache application component. Null if the component is not enabled.
*/
public function getCache()
{
return $this->getComponent('cache');
}
/**
* Returns the core message translations component.
* @return \yii\i18n\MessageSource the core message translations
*/
public function getCoreMessages()
{
return $this->getComponent('coreMessages');
}
/**
* Returns the application message translations component.
* @return \yii\i18n\MessageSource the application message translations
*/
public function getMessages()
{
return $this->getComponent('messages');
}
/**
* Returns the request component.
* @return Request the request component
*/
public function getRequest()
{
return $this->getComponent('request');
}
/**
* Sets default path aliases.
*/
public function registerDefaultAliases()
{
Yii::$aliases['@application'] = $this->getBasePath();
Yii::$aliases['@entry'] = dirname($_SERVER['SCRIPT_FILENAME']);
Yii::$aliases['@www'] = '';
}
/**
* Registers the core application components.
* @see setComponents
*/
public function registerCoreComponents()
{
$this->setComponents(array(
'errorHandler' => array(
'class' => 'yii\base\ErrorHandler',
),
'request' => array(
'class' => 'yii\base\Request',
),
'response' => array(
'class' => 'yii\base\Response',
),
'format' => array(
'class' => 'yii\base\Formatter',
),
'coreMessages' => array(
'class' => 'yii\i18n\PhpMessageSource',
'language' => 'en_us',
'basePath' => '@yii/messages',
),
'messages' => array(
'class' => 'yii\i18n\PhpMessageSource',
),
'securityManager' => array(
'class' => 'yii\base\SecurityManager',
),
'urlManager' => array(
'class' => 'yii\web\UrlManager',
),
));
}
/**
* Performs a controller action specified by a route.
* This method parses the specified route and creates the corresponding controller and action
* instances under the context of the specified module. It then runs the created action
* with the given parameters.
* @param string $route the route that specifies the action.
* @param array $params the parameters to be passed to the action
* @param Module $module the module which serves as the context of the route
* @return integer the action
* @throws InvalidConfigException if the module's defaultRoute is empty or the controller's defaultAction is empty
* @throws InvalidRequestException if the requested route cannot be resolved into an action successfully
*/
public function runAction($route, $params = array(), $module = null)
{
if ($module === null) {
$module = $this;
}
$route = trim($route, '/');
if ($route === '') {
$route = trim($module->defaultRoute, '/');
if ($route == '') {
throw new InvalidConfigException(get_class($module) . '::defaultRoute cannot be empty.');
}
}
if (($pos = strpos($route, '/')) !== false) {
$id = substr($route, 0, $pos);
$route = substr($route, $pos + 1);
} else {
$id = $route;
$route = '';
}
$childModule = $module->getModule($id);
if ($childModule !== null) {
return $this->runAction($route, $params, $childModule);
}
$controller = $this->createController($id, $module);
if ($controller !== null) {
if ($route === '') {
$route = $controller->defaultAction;
if ($route == '') {
throw new InvalidConfigException(get_class($controller) . '::defaultAction cannot be empty.');
}
}
$action = $this->createAction($route, $controller);
if ($action !== null) {
return $action->runWithParams($params);
}
}
throw new InvalidRequestException("Unable to resolve the request: $route");
}
/**
* Creates a controller instance based on the controller ID.
*
* The controller is created within the given module. The method first attempts to
* create the controller based on the [[controllerMap]] of the module. If not available,
* it will look for the controller class under the [[controllerPath]] and create an
* instance of it.
*
* @param string $id the controller ID
* @param Module $module the module that owns the controller
* @return Controller the newly created controller instance
*/
public function createController($id, $module)
{
if (isset($module->controllerMap[$id])) {
return Yii::createObject($module->controllerMap[$id], $id, $module);
} elseif (preg_match('/^[a-z0-9\\-_]+$/', $id)) {
$className = StringHelper::id2camel($id) . 'Controller';
$classFile = $module->controllerPath . DIRECTORY_SEPARATOR . $className . '.php';
if (is_file($classFile)) {
$className = $module->controllerNamespace . '\\' . $className;
if (!class_exists($className, false)) {
require($classFile);
}
if (class_exists($className, false) & & is_subclass_of($className, '\yii\base\Controller')) {
return new $className($id, $module);
}
}
}
return null;
}
/**
* Creates an action based on the given action ID.
* The action is created within the given controller. The method first attempts to
* create the action based on [[Controller::actions()]]. If not available,
* it will look for the inline action method within the controller.
* @param string $id the action ID
* @param Controller $controller the controller that owns the action
* @return Action the newly created action instance
*/
public function createAction($id, $controller)
{
if (isset($controller->actionMap[$id])) {
return Yii::createObject($controller->actionMap[$id], $id, $controller);
} elseif (preg_match('/^[a-z0-9\\-_]+$/', $id)) {
$methodName = 'action' . StringHelper::id2camel($id);
if (method_exists($controller, $methodName)) {
$method = new \ReflectionMethod($controller, $methodName);
if ($method->getName() === $methodName) {
return new InlineAction($id, $controller);
}
}
}
return null;
}
}
