css-javascript-toolbox / framework / events / observers / observer.observer.php

observer.observer.php in CSS & JavaScript Toolbox 6.0.9, at framework/events/observers/observer.observer.php

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1	<?php
2	/**
3	*
4	*/
5
6	//Import dependencies.
7	require_once 'observer.interface.php';
8
9	/**
10	*
11	*/
12	abstract class CJTObserver implements CJTIObserver {
13
14	/**
15	*
16	*/
17	const CALLBACK_CLASS = 0;
18
19	/**
20	*
21	*/
22	const CALLBACK_METHOD = 1;
23
24	/**
25	*
26	*/
27	const REDIRECT_MODE_PERMANENT = 0;
28
29	/**
30	* put your comment there...
31	*
32	* @var mixed
33	*/
34	protected $callback;
35
36	/**
37	* put your comment there...
38	*
39	* @var mixed
40	*/
41	protected $filter;
42
43	/**
44	* put your comment there...
45	*
46	* @var mixed
47	*/
48	protected $key;
49
50	/**
51	* put your comment there...
52	*
53	* @var mixed
54	*/
55	protected $name;
56
57	/**
58	* put your comment there...
59	*
60	* @var mixed
61	*/
62	protected $param;
63
64	/**
65	* put your comment there...
66	*
67	* @var mixed
68	*/
69	protected $params;
70
71	/**
72	* put your comment there...
73	*
74	* @var mixed
75	*/
76	protected $subject;
77
78	/**
79	* put your comment there...
80	*
81	* @param mixed $name
82	* @return CJTObserver
83	*/
84	public function __construct($name, $filter = null) {
85	$this->name = $name;
86	$this->filter = $filter;
87	}
88
89	/**
90	* put your comment there...
91	*
92	*/
93	public function getCallback($component = self::CALLBACK_CLASS) {
94	$component = ($component !== null) ? $this->callback[$component] : $this->callback;
95	return $component;
96	}
97
98	/**
99	* put your comment there...
100	*
101	* @param mixed $name
102	*/
103	public function getFilter($name) {
104	return $this->filter[$name];
105	}
106
107	/**
108	* put your comment there...
109	*
110	* @param mixed $observer
111	*/
112	public static function getInstance($subject, $callback) {
113	if (is_object($callback)) {
114	if (!in_array('CJTIObserver', class_implements($callback))) {
115	throw new Exception('Invalid observer callback object! Please provide a native PHP callback or observable object!!');
116	}
117	// callback is actually the observer!
118	$observer = $callback;
119	}
120	else {
121	// Define vars (E_ALL complain)!.
122	$name = null;
123	$filter = null;
124	$param = null;
125	// Short-hand array structure!
126	if (is_array($callback) && isset($callback['callback'])) {
127	// Get all params without callback
128	if (isset($callback['name'])) {
129	$name = $callback['name'];
130	}
131	if (isset($callback['filter'])) {
132	$filter = $callback['filter'];
133	}
134	$param = $callback['params'];
135	// Get PHP native CALLBACK!
136	$callback = $callback['callback'];
137	}
138	// Instantiate Observer!
139	$observerClass = $subject->getDefinition('observerClass');
140	$observer = new $observerClass($name, $filter);
141	$observer->init($subject, $callback, $param);
142	}
143	return $observer;
144	}
145
146	/**
147	* put your comment there...
148	*
149	*/
150	public function getKey() {
151	return $this->key;
152	}
153
154	/**
155	* put your comment there...
156	*
157	*/
158	public function getName() {
159	return $this->name;
160	}
161
162	/**
163	* put your comment there...
164	*
165	*/
166	public function getParam() {
167	return $this->param;
168	}
169
170	/**
171	* put your comment there...
172	*
173	*/
174	public function getSubject() {
175	return $this->subject;
176	}
177
178	/**
179	* put your comment there...
180	*
181	*/
182	public function getTarget() {
183	return $this->getSubject()->getTarget();
184	}
185
186	/**
187	* put your comment there...
188	*
189	* @param mixed $subject
190	* @param mixed $callback
191	*/
192	protected function init($subject, $callback, $param) {
193	// Initialize internals!
194	$this->subject = $subject;
195	$this->callback = $callback;
196	$this->param = $param;
197	// Chain!
198	return $this;
199	}
200
201	/**
202	* put your comment there...
203	*
204	* @param mixed $callback
205	* @param mixed $mode
206	*/
207	public function redirect($callback, $mode = self::REDIRECT_MODE_PERMANENT) {
208	// If callback is a class method and only the calss is passed
209	// use event name as the method name (DIRECT-NAMING-MAP)! DNM
210	if (is_array($callback) && !isset($callback[1])) {
211	// @TODO Don't use HJARD-CODED 'on PREFIX!
212	$callback[1] = "on{$this->subject->getName()}";
213	}
214	// Redirect based on the mode!
215	switch ($mode) {
216	// Remove current observer and add another one to be called
217	// next and forever!
218	case self::REDIRECT_MODE_PERMANENT :
219	// Create a redirect observer and tell it to deattach me!
220	$this->subject[] = $callback;
221	break;
222	}
223	return $this->redirectReturn();
224	}
225
226	/**
227	* put your comment there...
228	*
229	*/
230	protected abstract function redirectReturn();
231
232	/**
233	* put your comment there...
234	*
235	*/
236	public function trigger() {
237	$this->params = func_get_args();
238	// Callback!
239	$return = call_user_func_array($this->callback, $this->params);
240	return $return;
241	}
242
243	} // End class