1: <?php
 2: 
 3: namespace GeoIp2\Record;
 4: 
 5: abstract class AbstractRecord implements \JsonSerializable
 6: {
 7:     private $record;
 8: 
 9:     /**
10:      * @ignore
11:      */
12:     public function __construct($record)
13:     {
14:         $this->record = isset($record) ? $record : array();
15:     }
16: 
17:     /**
18:      * @ignore
19:      */
20:     public function __get($attr)
21:     {
22:         // XXX - kind of ugly but greatly reduces boilerplate code
23:         $key = $this->attributeToKey($attr);
24: 
25:         if ($this->__isset($attr)) {
26:             return $this->record[$key];
27:         } elseif ($this->validAttribute($attr)) {
28:             if (preg_match('/^is_/', $key)) {
29:                 return false;
30:             } else {
31:                 return null;
32:             }
33:         } else {
34:             throw new \RuntimeException("Unknown attribute: $attr");
35:         }
36:     }
37: 
38:     public function __isset($attr)
39:     {
40:         return $this->validAttribute($attr) &&
41:              isset($this->record[$this->attributeToKey($attr)]);
42:     }
43: 
44:     private function attributeToKey($attr)
45:     {
46:         return strtolower(preg_replace('/([A-Z])/', '_\1', $attr));
47:     }
48: 
49:     private function validAttribute($attr)
50:     {
51:         return in_array($attr, $this->validAttributes);
52:     }
53: 
54:     public function jsonSerialize()
55:     {
56:         return $this->record;
57:     }
58: }
59: