<?php

class Frwd_Authorize_AIM
{
    protected static $_instance;
    protected $_version = '3.1';
    protected $_testRequest;
    protected $_url;
    protected $_login;
    protected $_transactionKey;
    
    public static function getInstance()
    {
        if (null === Frwd_Authorize_AIM::$_instance) {
            Frwd_Authorize_AIM::$_instance = new self();
        }
        return Frwd_Authorize_AIM::$_instance;
    }
    
    public function setOptions($options)
    {
        if (isset($options['options'])) {
            unset($options['options']);
        }
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (method_exists($this, $method)) {
                $this->$method($value);
            } else {
                $this->_options[$key] = $value;
            }
        }
        return $this;
    }
    
    public function setLogin($login)
    {
        $this->_login = $login;
    }
    
    public function setTransactionKey($transactionKey)
    {
        $this->_transactionKey = $transactionKey;
    }
    
    public function setTestRequest($testRequest)
    {
        $this->_testRequest = ($testRequest) ? 'TRUE' : 'FALSE';
    }
    
    protected function _getUrl()
    {
        if ($this->_testRequest === 'FALSE') {
            $this->_url = 'https://secure.authorize.net/gateway/transact.dll';
        } else {
            $this->_url = 'https://test.authorize.net/gateway/transact.dll';
        }
        return $this->_url;
    }
    
    public function captureCreditCard($request)
    {
        $request['x_type'] = 'AUTH_CAPTURE';
        $request['x_method'] = 'CC';
        return $this->_sendRequest($request);
    }
    
    protected function _sendRequest(array $request)
    {
        $request['x_login'] = $this->_login;
        $request['x_tran_key'] = $this->_transactionKey;
        $request['x_version'] = $this->_version;
        $request['x_delim_data'] = 'TRUE';
        $request['x_delim_char'] = '|';
        $request['x_relay_response'] = 'FALSE';
        $postString = "";
        foreach ($request as $name => $value) {
            $postString .= $name . '=' . urlencode($value) . '&'; 
        }
        $postString = rtrim($postString, '& ');
        
        $ch = curl_init($this->_getUrl());
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postString);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        $response = curl_exec($ch);
        curl_close($ch);
        $responseData = explode($request['x_delim_char'], $response);
        return $responseData;
    }
}