khosb/plugins/checkout/PAYPAL_RECURRING.php

<?php
/**
 * AgileBill - Open Billing Software
 *
 * This body of work is free software; you can redistribute it and/or
 * modify it under the terms of the Open AgileBill License
 * License as published at http://www.agileco.com/agilebill/license1-4.txt
 *
 * Originally authored by Tony Landis, AgileBill LLC
 *
 * Recent modifications by Deon George
 *
 * @author Deon George <deonATleenooksDOTnet>
 * @copyright 2009 Deon George
 * @link http://osb.leenooks.net
 *
 * @link http://www.agileco.com/
 * @copyright 2004-2008 Agileco, LLC.
 * @license http://www.agileco.com/agilebill/license1-4.txt
 * @author Tony Landis <tony@agileco.com>
 * @package AgileBill
 * @subpackage Checkout:Paypal
 */

if (defined('PATH_MODULES'))
	include_once(PATH_PLUGINS.'checkout/PAYPAL/PAYPAL.php');
else
	include_once('PAYPAL/PAYPAL.php');

/**
 * The main AgileBill Paypal Payment Class
 *
 * @package AgileBill
 * @subpackage Checkout:Paypal
 */
class plg_chout_PAYPAL_RECURRING extends plg_chout_base_PAYPAL {
	public function __construct($checkout_id=false,$multi=false) {
		$this->name = 'PAYPAL_RECURRING';
		parent::__construct($checkout_id,$multi);

		$this->recurr_only = true;
	}

	# Perform the checkout transaction (new purchase):
	public function bill_checkout($amount,$invoice,$currency_iso,$acct_fields,$total_recurring=false,$recurr_bill_arr=array()) {
		global $C_debug;

		# Validate we have configured the account
		if (! $this->cfg['email']) {
			$C_debug->alert(_('Sorry, unable to use this payment method, it has not been configured properly.'));

			return false;
		}

		# Validate the currency:
		if (! $this->validate_currency($currency_iso))
			return false;

		# Special JPY formatting:
		if ($currency_iso == 'JPY')
			$amount = round($amount);

		# Get the regular period for this subscription:
		switch($recurr_bill_arr[0]['recurr_schedule']) {
			case 0: $p3 = '1'; $t3 = 'W'; break;
			case 1: $p3 = '1'; $t3 = 'M'; break;
			case 2: $p3 = '3'; $t3 = 'M'; break;
			case 3: $p3 = '6'; $t3 = 'M'; break;
			case 4: $p3 = '1'; $t3 = 'Y'; break;
			case 5: $p3 = '2'; $t3 = 'Y'; break;
			default:
				$C_debug->error(__FILE__,__METHOD__,sprintf('Unknown recurr_schedule %s',$recurr_bill_arr[0]['recurr_schedule']));
				return false;
		}


		# Calculate the payment fee to be adde
		$fee = $fee_recurring = 0;
		switch ($this->cfg['feetype']) {
			case '2':
				$fee = $fee_recurring = $this->cfg['fee'];
				printf('<script type="text/javascript">alert("%s")</script>',
					sprintf(_('Please note, a payment processing fee of %3.2f will automatically be added to this payment schedule.'),$this->cfg['fee']));
				break;

			case '1':
				$fee = round($amount*$this->cfg['fee'],2);
				$fee_recurring = round($total_recurring*$this->cfg['fee'],2);
				printf('<script type="text/javascript">alert("%s")</script>',
					sprintf(_('Please note, a payment processing fee of %3.2f%% will automatically be added to this payment schedule.'),$this->cfg['fee']*100));
				break;
		}
		$amount += $fee;
		$total_recurring += $fee_recurring;

		# Set the vars
		$vals = array(
			array('cmd','_xclick-subscriptions'),
			array('txn_type','subscr_signup'),
			array('bn','osb_BuyNow_WPS_AU'),
			array('no_shipping','1'),
			array('no_note','1'),
			array('rm','2'),
			array('business',$this->cfg['email']),
			array('tax_cart','0'),
			array('return',$this->success_url.$invoice),
			array('cancel_return',$this->decline_url.$invoice),
			array('notify_url',$this->return_url),
			array('currency_code',$currency_iso),
			array('invoice',$invoice),
			array('first_name',$acct_fields['first_name']),
			array('last_name',$acct_fields['last_name']),
			array('payer_business_name',$acct_fields['company']),
			array('address_street',$acct_fields['address1']),
			array('address_city',$acct_fields['city']),
			array('address_state',$acct_fields['state']),
			array('address_zip',$acct_fields['zip']),
			array('address_country',$acct_fields['country_id']),
			array('payer_email',$acct_fields['email']),
			array('payer_id',$acct_fields['id']),
			array('a1',$amount),
			array('a3',$total_recurring),
			array('p3',$p3),
			array('t3',$t3),
			array('sra',1),
			array('src',1),
			array('item_name','Automatic Payment'),
			array('usr_manage',0)
		);

		# Get the next bill date for this subscription:
		# @todo Dont we already know this next date?
		if ($recurr_bill_arr[0]['recurr_type'] == '1') {
			# Pro-rate billing:
			include_once(PATH_MODULES.'product/product.inc.php');
			$product = new product;

			$arr = $product->recurrDates($recurr_bill_arr[0]['recurr_schedule'],$recurr_bill_arr[0]['recurr_weekday'],$recurr_bill_arr[0]['recurr_week']);
			$remain_time = $arr['end']-$arr['date'];
			$period1 = round($remain_time/86400);

			switch($recurr_bill_arr[0]['recurr_schedule']) {
				case 0:
					array_push($vals,array('p1',round($period1/7)));
					array_push($vals,array('t1','W'));
					break;

				case 1:
				case 2:
				case 3:
					array_push($vals,array('p1',round($period1/365*12)));
					array_push($vals,array('t1','M'));
					break;

				case 4:
				case 5:
					array_push($vals,array('p1',round($period1/365)));
					array_push($vals,array('t1','Y'));
					break;

				default:
					$C_debug->error(__FILE__,__METHOD__,sprintf('Unknown recurr_schedule %s',$recurr_bill_arr[0]['recurr_schedule']));
					return false;
			}

		# Bill on anniversary:
		} else {
			array_push($vals,array('p1',$p3));
			array_push($vals,array('t1',$t3));
		}

		$this->post_vars(sprintf('%s/cgi-bin/webscr',$this->getLocation()),$vals);

		return true;
	}

	# Postback Validation
	public function postback() {
		# Read the post from PayPal system and add 'cmd'
		global $_POST,$C_debug;

		$req = 'cmd=_notify-validate';

		foreach ($_POST as $key => $value) {
			$value = urlencode(stripslashes($value));
			$req .= sprintf('&%s=%s',$key,$value);
		}

		$C_debug->error(__FILE__,__METHOD__,sprintf("%s: %s - Invoice: %s\r\n%s",$this->name,$_POST['txn_type'],$_POST['invoice'],$req));

		# Post back to PayPal system to validate
		$header = "POST /cgi-bin/webscr HTTP/1.0\r\n";
		$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
		$header .= sprintf("Content-Length: %s\r\n\r\n",strlen($req));

		$fp = fsockopen($this->getLocation(false,true),80,$errno,$errstr,30);

		# Needed for validation
		$ret['invoice_id'] = $_POST['invoice'];
		$ret['transaction_id'] = $_POST['txn_id'];
		$ret['currency'] = $_POST['mc_currency'];

		if (! empty($_POST['mc_gross']))
			$ret['amount'] = $_POST['mc_gross'];
		else
			$ret['amount'] = $_POST['payment_gross'];

		$ret['subscription_id']	= $_POST['subscr_id'];

		# Validate
		if (! $fp) {
			$C_debug->error(__FILE__,__METHOD__,sprintf('Unable to connect to %s',$this->getLocation(false,true)));

		} else {
			fputs($fp,$header.$req);

			while (! feof($fp)) {
				$res = trim(strtoupper(fgets($fp,1024)));

				# HTTP traffic
				if (! $res
					|| preg_match('/^HTTP/',$res)
					|| preg_match('/^DATE/',$res)
					|| preg_match('/^SERVER/',$res)
					|| preg_match('/^SET-COOKIE/',$res)
					|| preg_match('/^CONNECTION/',$res)
					|| preg_match('/^CONTENT-TYPE/',$res))
					continue;

				switch ($res) {
					case 'VERIFIED':
						# Get the payment status
						$ret['status'] = true;
						switch($_POST['txn_type']) {
							case 'subscr_cancel': 	$ret['status'] = false; break;
							case 'subscr_failed': 	$ret['status'] = false; break;
							case 'subscr_eot':		$ret['status'] = false; break;
						}

						if ($ret['status'] != false) {
							switch($_POST['payment_status']) {
								case 'Canceled_Reversal':	$ret['status'] = true; break;
								case 'Completed': 			$ret['status'] = true; break;
								default:			 		$ret['status'] = false; break;
							}
						}

						# Get the processor details
						$this->getDetailsName($this->name);
						$cfg = unserialize($this->flds['plugin_data']);
						if ($_POST['receiver_email'] == $cfg['email']) {
							include_once(PATH_MODULES.'checkout/checkout.inc.php');
							$checkout = new checkout;
							$checkout->postback($ret);
						}

						fclose($fp);

						header('HTTP/1.1 200 OK');
						header('Status: 200 OK');
						return;

						break;

					default:
						# Log for manual investigation
						$C_debug->error(__FILE__,__METHOD__,sprintf('Postback for Invoice %s is %s, PayPal subscription id %s',$ret['invoice_id'],$res,$ret['subscription_id']));

						fclose($fp);

						header('HTTP/1.0 404 Not Found');
						return false;
				}
			}
		}

		header('HTTP/1.0 500 Temporary Failure');
	}
}

# Postback Function
if (empty($VAR) && empty($VAR['do'])) {
	include_once('../../config.inc.php');
	require_once(PATH_ADODB.'adodb.inc.php');
	require_once(PATH_CORE.'database.inc.php');
	require_once(PATH_CORE.'setup.inc.php');
	$C_debug = new CORE_debugger;
	$C_db = &DB();
	$C_setup = new CORE_setup;
	$plg = new plg_chout_PAYPAL_RECURRING;
	$plg->postback();
}
?>