Возможно боян, но доставило

Код (Text):

1.  
2. ********************************************************************
3. Model-View-Controller implementation according to POSA
4. (Pattern-Oriented Software Architecture
5.   http://www.hillside.net/patterns/books/Siemens/book.html)
6. ********************************************************************/
7.  
8. class HelloWorldController {
9.     private $model;
10.     function __construct($model) {
11.         $this->model = $model;
12.     }
13.  
14.     function handleEvent($args) {
15.         $this->model->setStrategy($args[2]);
16.         $this->model->addText($args[1]);
17.     }
18. }
19.  
20.  
21. class HelloWorldModel {
22.     private $text;
23.     private $observers = array();
24.     private $strategy;
25.  
26.     function attach($observer) {
27.         $this->observers[] = $observer;
28.     }
29.  
30.     function getData() {
31.         $facade = new HelloWorldFacade($this->strategy);
32.         return $facade->getHelloWorld().$this->text."\n";
33.     }
34.  
35.     function addText($text='') {
36.         $this->text = $text;
37.         $this->notify();
38.     }
39.  
40.     function setStrategy($strategy) {
41.         $this->strategy = $strategy;
42.     }
43.  
44.     function notify() {
45.         foreach ($this->observers as $observer) {
46.             $observer->update();
47.         }
48.     }
49. }
50.  
51. class HelloWorldView {
52.     private $model;
53.  
54.     function initialize($model) {
55.         $this->model = $model;
56.         $model->attach($this);
57.         return $this->makeController();
58.     }
59.  
60.     function makeController() {
61.         return new HelloWorldController($this->model);
62.     }
63.  
64.     function update() {
65.         $this->display();
66.     }
67.  
68.     function display() {
69.         echo $this->model->getData();
70.     }
71. }
72.  
73.  
74. /*********************************************************************
75. "Business logic"
76. ********************************************************************/
77.  
78. class HelloWorld {
79.    function execute() {
80.        return "Hello world";
81.    }
82. }
83.  
84. class HelloWorldDecorator {
85.    private $helloworld;
86.    function __construct($helloworld) {
87.        $this->helloworld = $helloworld;
88.    }
89.  
90.    function execute() {
91.        return $this->helloworld->execute();
92.    }
93. }
94.  
95. abstract class HelloWorldEmphasisStrategy {
96.     abstract function emphasize($string);
97. }
98.  
99. class HelloWorldBangEmphasisStrategy extends HelloWorldEmphasisStrategy {
100.     function emphasize($string) {
101.        return $string."!";
102.     }
103. }
104.  
105. class HelloWorldRepetitionEmphasisStrategy extends HelloWorldEmphasisStrategy {
106.     function emphasize($string) {
107.        return $string." and ".$string." again";
108.     }
109. }
110.  
111. class HelloWorldEmphasizer extends HelloWorldDecorator {
112.    private $strategy;
113.    function HelloWorldEmphasizer($helloworld,$strategy) {
114.        $this->strategy = $strategy;
115.        parent::__construct($helloworld);
116.    }
117.  
118.    function execute() {
119.        $string = parent::execute();
120.        return $this->strategy->emphasize($string);
121.    }
122. }
123.  
124. class HelloWorldStrategyFactory {
125.     static function make($type) {
126.         if ($type == 'repetition') return self::makeRepetitionStrategy();
127.         return self::makeBangStrategy();
128.     }
129.  
130.     static function makeBangStrategy() {
131.         return new HelloWorldBangEmphasisStrategy;
132.     }
133.     static function makeRepetitionStrategy() {
134.         return new HelloWorldRepetitionEmphasisStrategy;
135.     }
136. }
137.  
138. class HelloWorldFormatter extends HelloWorldDecorator {
139.    function execute() {
140.        $string = parent::execute();
141.        return $string."\n";
142.    }
143. }
144.  
145. class HelloWorldFacade {
146.     private $strategy;
147.     function __construct($strategyType) {
148.         $this->strategy = HelloWorldStrategyFactory::make($strategyType);
149.     }
150.  
151.     function getHelloWorld() {
152.         $formatter = new HelloWorldFormatter(
153.                 new HelloWorldEmphasizer(
154.                     new HelloWorld,$this->strategy));
155.         return $formatter->execute();
156.     }
157. }
158.  
159. $model = new HelloWorldModel;
160. $view = new HelloWorldView;
161. $controller = $view->initialize($model);
162. $controller->handleEvent($_SERVER['argv']);