<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');



/*

 * CI-Merchant Library

 *

 * Copyright (c) 2011-2012 Adrian Macneil

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */



/**

 * Merchant Paypal base class

 *

 * Base class for Paypal Pro and Paypal Express

 */



abstract class Merchant_paypal_base extends Merchant_driver

{

	const PROCESS_URL = 'https://api-3t.paypal.com/nvp';

	const PROCESS_URL_TEST = 'https://api-3t.sandbox.paypal.com/nvp';

	const CHECKOUT_URL = 'https://www.paypal.com/webscr';

	const CHECKOUT_URL_TEST = 'https://www.sandbox.paypal.com/webscr';



	public function capture()

	{

		$request = $this->_build_capture();

		$response = $this->_post_paypal_request($request);

		return new Merchant_paypal_api_response($response, Merchant_response::COMPLETE);

	}



	public function refund()

	{

		$request = $this->_build_refund();

		$response = $this->_post_paypal_request($request);

		return new Merchant_paypal_api_response($response, Merchant_response::REFUNDED);

	}



	protected function _build_capture()

	{

		$this->require_params('reference', 'amount');



		$request = $this->_new_request('DoCapture');

		$request['AMT'] = $this->amount_dollars();

		$request['CURRENCYCODE'] = $this->param('currency');

		$request['AUTHORIZATIONID'] = $this->param('reference');

		$request['COMPLETETYPE'] = 'Complete';



		return $request;

	}



	protected function _build_refund()

	{

		$this->require_params('reference');



		$request = $this->_new_request('RefundTransaction');

		$request['TRANSACTIONID'] = $this->param('reference');

		$request['REFUNDTYPE'] = 'Full';



		return $request;

	}



	protected function _new_request($method)

	{

		$request = array();

		$request['METHOD'] = $method;

		$request['VERSION'] = '85.0';

		$request['USER'] = $this->setting('username');

		$request['PWD'] = $this->setting('password');

		$request['SIGNATURE'] = $this->setting('signature');



		return $request;

	}



	protected function _add_request_details(&$request, $action, $prefix = '')

	{

		$request[$prefix.'PAYMENTACTION'] = $action;

		$request[$prefix.'AMT'] = $this->amount_dollars();

		$request[$prefix.'CURRENCYCODE'] = $this->param('currency');

		$request[$prefix.'DESC'] = $this->param('description');

	}



	/**

	 * Post a request to the PayPal API and decode the response

	 */

	protected function _post_paypal_request($request)

	{

		// post and decode response

		$response = $this->post_request($this->_process_url(), $request);

		$response_vars = array();

		parse_str($response, $response_vars);



		// check whether response was successful

		if (isset($response_vars['ACK']) AND

			($response_vars['ACK'] == 'Success' OR $response_vars['ACK'] == 'SuccessWithWarning'))

		{

			return $response_vars;

		}

		elseif (isset($response_vars['L_LONGMESSAGE0']))

		{

			throw new Merchant_exception($response_vars['L_LONGMESSAGE0']);

		}



		throw new Merchant_exception(lang('merchant_invalid_response'));

	}



	protected function _process_url()

	{

		return $this->setting('test_mode') ? self::PROCESS_URL_TEST : self::PROCESS_URL;

	}



	protected function _checkout_url()

	{

		return $this->setting('test_mode') ? self::CHECKOUT_URL_TEST : self::CHECKOUT_URL;

	}

}



class Merchant_paypal_api_response extends Merchant_response

{

	public function __construct($response, $success_status)

	{

		// because the paypal response doesn't specify the state of the transaction,

		// we need to specify the status in the constructor

		$this->_status = $success_status;



		// find the reference

		foreach (array('REFUNDTRANSACTIONID', 'TRANSACTIONID', 'PAYMENTINFO_0_TRANSACTIONID') as $key)

		{

			if (isset($response[$key]))

			{

				$this->_reference = $response[$key];

				return;

			}

		}

	}

}



/* End of file ./libraries/merchant/drivers/merchant_paypal_pro.php */