1: <?php
 2: namespace NGS\Patterns;
 3: 
 4: require_once(__DIR__.'/AggregateRoot.php');
 5: require_once(__DIR__.'/../Timestamp.php');
 6: require_once(__DIR__.'/../Converter/PrimitiveConverter.php');
 7: 
 8: use NGS\Converter\PrimitiveConverter;
 9: use NGS\Timestamp;
10: 
11: class Snapshot
12: {
13:     protected $at;
14:     protected $action;
15:     protected $value;
16: 
17:     public function __construct($at, $action, AggregateRoot $value)
18:     {
19:         $this->at = new Timestamp($at);
20:         $this->action = PrimitiveConverter::toString($action);
21:         $this->value = $value;
22:     }
23: 
24:     public function getAt()
25:     {
26:         return $this->at;
27:     }
28: 
29:     public function getAction()
30:     {
31:         return $this->action;
32:     }
33: 
34:     public function getValue()
35:     {
36:         return $this->value;
37:     }
38: 
39:     public function __get($name)
40:     {
41:         if($name === 'at')
42:             return $this->at;
43:         if($name === 'action')
44:             return $this->action;
45:         if($name === 'value')
46:             return $this->value;
47:         throw new \InvalidArgumentException('Unknown property '.$name);
48:     }
49: }
50: