1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Application;
  9: 
 10: use Nette;
 11: 
 12: 
 13: /**
 14:  * Front Controller.
 15:  *
 16:  * @author     David Grudl
 17:  */
 18: class Application extends Nette\Object
 19: {
 20:     /** @var int */
 21:     public static $maxLoop = 20;
 22: 
 23:     /** @var bool enable fault barrier? */
 24:     public $catchExceptions;
 25: 
 26:     /** @var string */
 27:     public $errorPresenter;
 28: 
 29:     /** @var callable[]  function (Application $sender); Occurs before the application loads presenter */
 30:     public $onStartup;
 31: 
 32:     /** @var callable[]  function (Application $sender, \Exception $e = NULL); Occurs before the application shuts down */
 33:     public $onShutdown;
 34: 
 35:     /** @var callable[]  function (Application $sender, Request $request); Occurs when a new request is received */
 36:     public $onRequest;
 37: 
 38:     /** @var callable[]  function (Application $sender, Presenter $presenter); Occurs when a presenter is created */
 39:     public $onPresenter;
 40: 
 41:     /** @var callable[]  function (Application $sender, IResponse $response); Occurs when a new response is ready for dispatch */
 42:     public $onResponse;
 43: 
 44:     /** @var callable[]  function (Application $sender, \Exception $e); Occurs when an unhandled exception occurs in the application */
 45:     public $onError;
 46: 
 47:     /** @var Request[] */
 48:     private $requests = array();
 49: 
 50:     /** @var IPresenter */
 51:     private $presenter;
 52: 
 53:     /** @var Nette\Http\IRequest */
 54:     private $httpRequest;
 55: 
 56:     /** @var Nette\Http\IResponse */
 57:     private $httpResponse;
 58: 
 59:     /** @var IPresenterFactory */
 60:     private $presenterFactory;
 61: 
 62:     /** @var IRouter */
 63:     private $router;
 64: 
 65: 
 66:     public function __construct(IPresenterFactory $presenterFactory, IRouter $router, Nette\Http\IRequest $httpRequest, Nette\Http\IResponse $httpResponse)
 67:     {
 68:         $this->httpRequest = $httpRequest;
 69:         $this->httpResponse = $httpResponse;
 70:         $this->presenterFactory = $presenterFactory;
 71:         $this->router = $router;
 72:     }
 73: 
 74: 
 75:     /**
 76:      * Dispatch a HTTP request to a front controller.
 77:      * @return void
 78:      */
 79:     public function run()
 80:     {
 81:         try {
 82:             $this->onStartup($this);
 83:             $this->processRequest($this->createInitialRequest());
 84:             $this->onShutdown($this);
 85: 
 86:         } catch (\Exception $e) {
 87:             $this->onError($this, $e);
 88:             if ($this->catchExceptions && $this->errorPresenter) {
 89:                 try {
 90:                     $this->processException($e);
 91:                     $this->onShutdown($this, $e);
 92:                     return;
 93: 
 94:                 } catch (\Exception $e) {
 95:                     $this->onError($this, $e);
 96:                 }
 97:             }
 98:             $this->onShutdown($this, $e);
 99:             throw $e;
100:         }
101:     }
102: 
103: 
104:     /**
105:      * @return Request
106:      */
107:     public function createInitialRequest()
108:     {
109:         $request = $this->router->match($this->httpRequest);
110: 
111:         if (!$request instanceof Request) {
112:             throw new BadRequestException('No route for HTTP request.');
113: 
114:         } elseif (strcasecmp($request->getPresenterName(), $this->errorPresenter) === 0) {
115:             throw new BadRequestException('Invalid request. Presenter is not achievable.');
116:         }
117: 
118:         try {
119:             $name = $request->getPresenterName();
120:             $this->presenterFactory->getPresenterClass($name);
121:             $request->setPresenterName($name);
122:         } catch (InvalidPresenterException $e) {
123:             throw new BadRequestException($e->getMessage(), 0, $e);
124:         }
125: 
126:         return $request;
127:     }
128: 
129: 
130:     /**
131:      * @return void
132:      */
133:     public function processRequest(Request $request)
134:     {
135:         if (count($this->requests) > self::$maxLoop) {
136:             throw new ApplicationException('Too many loops detected in application life cycle.');
137:         }
138: 
139:         $this->requests[] = $request;
140:         $this->onRequest($this, $request);
141: 
142:         $this->presenter = $this->presenterFactory->createPresenter($request->getPresenterName());
143:         $this->onPresenter($this, $this->presenter);
144:         $response = $this->presenter->run($request);
145: 
146:         if ($response instanceof Responses\ForwardResponse) {
147:             $this->processRequest($response->getRequest());
148: 
149:         } elseif ($response) {
150:             $this->onResponse($this, $response);
151:             $response->send($this->httpRequest, $this->httpResponse);
152:         }
153:     }
154: 
155: 
156:     /**
157:      * @return void
158:      */
159:     public function processException(\Exception $e)
160:     {
161:         if (!$e instanceof BadRequestException && $this->httpResponse instanceof Nette\Http\Response) {
162:             $this->httpResponse->warnOnBuffer = FALSE;
163:         }
164:         if (!$this->httpResponse->isSent()) {
165:             $this->httpResponse->setCode($e instanceof BadRequestException ? ($e->getCode() ?: 404) : 500);
166:         }
167: 
168:         $args = array('exception' => $e, 'request' => end($this->requests) ?: NULL);
169:         if ($this->presenter instanceof UI\Presenter) {
170:             try {
171:                 $this->presenter->forward(":$this->errorPresenter:", $args);
172:             } catch (AbortException $foo) {
173:                 $this->processRequest($this->presenter->getLastCreatedRequest());
174:             }
175:         } else {
176:             $this->processRequest(new Request($this->errorPresenter, Request::FORWARD, $args));
177:         }
178:     }
179: 
180: 
181:     /**
182:      * Returns all processed requests.
183:      * @return Request[]
184:      */
185:     public function getRequests()
186:     {
187:         return $this->requests;
188:     }
189: 
190: 
191:     /**
192:      * Returns current presenter.
193:      * @return IPresenter
194:      */
195:     public function getPresenter()
196:     {
197:         return $this->presenter;
198:     }
199: 
200: 
201:     /********************* services ****************d*g**/
202: 
203: 
204:     /**
205:      * Returns router.
206:      * @return IRouter
207:      */
208:     public function getRouter()
209:     {
210:         return $this->router;
211:     }
212: 
213: 
214:     /**
215:      * Returns presenter factory.
216:      * @return IPresenterFactory
217:      */
218:     public function getPresenterFactory()
219:     {
220:         return $this->presenterFactory;
221:     }
222: 
223: 
224:     /********************* request serialization ****************d*g**/
225: 
226: 
227:     /** @deprecated */
228:     function storeRequest($expiration = '+ 10 minutes')
229:     {
230:         trigger_error(__METHOD__ . '() is deprecated; use $presenter->storeRequest() instead.', E_USER_DEPRECATED);
231:         return $this->presenter->storeRequest($expiration);
232:     }
233: 
234:     /** @deprecated */
235:     function restoreRequest($key)
236:     {
237:         trigger_error(__METHOD__ . '() is deprecated; use $presenter->restoreRequest() instead.', E_USER_DEPRECATED);
238:         return $this->presenter->restoreRequest($key);
239:     }
240: 
241: }
242: