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:             return null;
29:         } else {
30:             throw new \RuntimeException("Unknown attribute: $attr");
31:         }
32:     }
33: 
34:     public function __isset($attr)
35:     {
36:         return $this->validAttribute($attr) &&
37:              isset($this->record[$this->attributeToKey($attr)]);
38:     }
39: 
40:     private function attributeToKey($attr)
41:     {
42:         return strtolower(preg_replace('/([A-Z])/', '_\1', $attr));
43:     }
44: 
45:     private function validAttribute($attr)
46:     {
47:         return in_array($attr, $this->validAttributes);
48:     }
49: 
50:     public function jsonSerialize()
51:     {
52:         return $this->record;
53:     }
54: }
55: