<?php
 
 namespace Phaxio;
 
 class PhaxCode extends AbstractResource
 {
     public static function create($phaxio, $params) {
         $phax_code = new self($phaxio);
         return $phax_code->_create($params);
     }
 
     public static function init($phaxio, $identifier = null) {
         return new self($phaxio, array('identifier' => $identifier));
     }
 
     private function _create($params) {
         if (isset($this->identifier)) throw new Exception("PhaxCode #{$this->identifier} already created");
 
         $result = $this->phaxio->doRequest('POST', 'phax_codes', $params);
         $this->identifier = $result->getData()['identifier'];
 
         return $this;
     }
 
     public function retrieve($getMetadata = false) {
         $format = ($getMetadata ? ".json" : ".png");
 
         if ($this->identifier === null) {
             $result = $this->phaxio->doRequest("GET", 'phax_code' . $format, array(), $getMetadata);
         } else {
             $result = $this->phaxio->doRequest("GET", 'phax_codes/' . urlencode($this->identifier) . $format, array(), $getMetadata);
         }
 
         if ($getMetadata) {
             $this->exchangeArray(array_merge($this->getArrayCopy(), $result->getData()));
         } else {
             $this->exchangeArray(array_merge($this->getArrayCopy(), $result));
         }
 
         return $this;
     }
 }