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<?php
include_once('swpm_handle_subsc_ipn.php');
class swpm_smart_checkout_ipn_handler {
var $last_error; // holds the last error encountered
var $ipn_log = false; // bool: log IPN results to text file?
var $ipn_log_file; // filename of the IPN log
var $ipn_response; // holds the IPN response from paypal
var $ipn_data = array(); // array contains the POST values for IPN
var $fields = array(); // array holds the fields to submit to paypal
var $sandbox_mode = false;
function __construct() {
$this->paypal_url = 'https://www.paypal.com/cgi-bin/webscr';
$this->last_error = '';
$this->ipn_log_file = 'ipn_handle_debug_swpm.log';
$this->ipn_response = '';
}
function swpm_validate_and_create_membership() {
// Check Product Name , Price , Currency , Receivers email ,
$error_msg = "";
// Read the IPN and validate
$gross_total = $this->ipn_data['mc_gross'];
$transaction_type = $this->ipn_data['txn_type'];
$txn_id = $this->ipn_data['txn_id'];
$payment_status = $this->ipn_data['payment_status'];
//Check payment status
if (!empty($payment_status)) {
if ($payment_status == "Denied") {
$this->debug_log("Payment status for this transaction is DENIED. You denied the transaction... most likely a cancellation of an eCheque. Nothing to do here.", false);
return false;
}
if ($payment_status == "Canceled_Reversal") {
$this->debug_log("This is a dispute closed notification in your favour. The plugin will not do anyting.", false);
return true;
}
if ($payment_status != "Completed" && $payment_status != "Processed" && $payment_status != "Refunded" && $payment_status != "Reversed") {
$error_msg .= 'Funds have not been cleared yet. Transaction will be processed when the funds clear!';
$this->debug_log($error_msg, false);
$this->debug_log(json_encode($this->ipn_data), false);
return false;
}
}
//Check txn type
if ($transaction_type == "new_case") {
$this->debug_log('This is a dispute case. Nothing to do here.', true);
return true;
}
$custom = urldecode($this->ipn_data['custom']);
$this->ipn_data['custom'] = $custom;
$customvariables = SwpmTransactions::parse_custom_var($custom);
//Handle refunds
if ($gross_total < 0) {
// This is a refund or reversal
$this->debug_log('This is a refund notification. Refund amount: ' . $gross_total, true);
swpm_handle_subsc_cancel_stand_alone($this->ipn_data, true);
return true;
}
if (isset($this->ipn_data['reason_code']) && $this->ipn_data['reason_code'] == 'refund') {
$this->debug_log('This is a refund notification. Refund amount: ' . $gross_total, true);
swpm_handle_subsc_cancel_stand_alone($this->ipn_data, true);
return true;
}
if (($transaction_type == "subscr_signup")) {
$this->debug_log('Subscription signup IPN received... (handled by the subscription IPN handler)', true);
// Code to handle the signup IPN for subscription
$subsc_ref = $customvariables['subsc_ref'];
if (!empty($subsc_ref)) {
$this->debug_log('Found a membership level ID. Creating member account...', true);
$swpm_id = $customvariables['swpm_id'];
swpm_handle_subsc_signup_stand_alone($this->ipn_data, $subsc_ref, $this->ipn_data['subscr_id'], $swpm_id);
//Handle customized subscription signup
}
return true;
} else if (($transaction_type == "subscr_cancel") || ($transaction_type == "subscr_eot") || ($transaction_type == "subscr_failed")) {
// Code to handle the IPN for subscription cancellation
$this->debug_log('Subscription cancellation IPN received... (handled by the subscription IPN handler)', true);
swpm_handle_subsc_cancel_stand_alone($this->ipn_data);
return true;
} else {
$cart_items = array();
$this->debug_log('Transaction Type: Buy Now/Subscribe', true);
$item_number = $this->ipn_data['item_number'];
$item_name = $this->ipn_data['item_name'];
$quantity = $this->ipn_data['quantity'];
$mc_gross = $this->ipn_data['mc_gross'];
$mc_currency = $this->ipn_data['mc_currency'];
$current_item = array(
'item_number' => $item_number,
'item_name' => $item_name,
'quantity' => $quantity,
'mc_gross' => $mc_gross,
'mc_currency' => $mc_currency,
);
array_push($cart_items, $current_item);
}
$counter = 0;
foreach ($cart_items as $current_cart_item) {
$cart_item_data_num = $current_cart_item['item_number'];
$cart_item_data_name = trim($current_cart_item['item_name']);
$cart_item_data_quantity = $current_cart_item['quantity'];
$cart_item_data_total = $current_cart_item['mc_gross'];
$cart_item_data_currency = $current_cart_item['mc_currency'];
if (empty($cart_item_data_quantity)) {
$cart_item_data_quantity = 1;
}
$this->debug_log('Item Number: ' . $cart_item_data_num, true);
$this->debug_log('Item Name: ' . $cart_item_data_name, true);
$this->debug_log('Item Quantity: ' . $cart_item_data_quantity, true);
$this->debug_log('Item Total: ' . $cart_item_data_total, true);
$this->debug_log('Item Currency: ' . $cart_item_data_currency, true);
//Get the button id
$pp_hosted_button = false;
$button_id = $cart_item_data_num; //Button id is the item number.
$membership_level_id = get_post_meta($button_id, 'membership_level_id', true);
if (!SwpmUtils::membership_level_id_exists($membership_level_id)) {
$this->debug_log('This payment button was not created in the plugin. This is a paypal hosted button.', true);
$pp_hosted_button = true;
}
//Price check
$check_price = true;
$msg = "";
$msg = apply_filters('swpm_before_price_check_filter', $msg, $current_cart_item);
if (!empty($msg) && $msg == "price-check-override") {//This filter allows an extension to do a customized version of price check (if needed)
$check_price = false;
$this->debug_log('Price and currency check has been overridden by an addon/extension.', true);
}
if ($check_price && !$pp_hosted_button) {
//Check according to buy now payment or subscription payment.
$button_type = get_post_meta($button_id, 'button_type', true);
if ($button_type == 'pp_smart_checkout') {//This is a PayPal Smart Checkout type button
$expected_amount = (get_post_meta($button_id, 'payment_amount', true)) * $cart_item_data_quantity;
$expected_amount = round($expected_amount, 2);
$received_amount = $cart_item_data_total;
} else {
$this->debug_log('Error! Unexpected button type: ' . $button_type, false);
return false;
}
if ($received_amount < $expected_amount) {
//Error! amount received is less than expected. This is invalid.
$this->debug_log('Expected amount: ' . $expected_amount, true);
$this->debug_log('Received amount: ' . $received_amount, true);
$this->debug_log('Price check failed. Amount received is less than the amount expected. This payment will not be processed.', false);
return false;
}
}
//*** Handle Membership Payment ***
//--------------------------------------------------------------------------------------
// ========= Need to find the (level ID) in the custom variable ============
$subsc_ref = $customvariables['subsc_ref']; //Membership level ID
$this->debug_log('Membership payment paid for membership level ID: ' . $subsc_ref, true);
if (!empty($subsc_ref)) {
$swpm_id = "";
if (isset($customvariables['swpm_id'])) {
$swpm_id = $customvariables['swpm_id'];
}
if ($transaction_type == "smart_checkout") {
$this->debug_log('Transaction type: web_accept. Creating member account...', true);
swpm_handle_subsc_signup_stand_alone($this->ipn_data, $subsc_ref, $this->ipn_data['txn_id'], $swpm_id);
}
} else {
$this->debug_log('Membership level ID is missing in the payment notification! Cannot process this notification.', false);
}
//== End of Membership payment handling ==
$counter++;
}
/* * * Do Post payment operation and cleanup ** */
//Save the transaction data
$this->debug_log('Saving transaction data to the database table.', true);
$this->ipn_data['gateway'] = 'pp_smart_checkout';
$this->ipn_data['status'] = $this->ipn_data['payment_status'];
SwpmTransactions::save_txn_record($this->ipn_data, $cart_items);
$this->debug_log('Transaction data saved.', true);
//Trigger the PayPal IPN processed action hook (so other plugins can can listen for this event).
do_action('swpm_pp_smart_checkout_ipn_processed', $this->ipn_data);
do_action('swpm_payment_ipn_processed', $this->ipn_data);
return true;
}
function create_ipn_from_smart_checkout($data) {
$ipn['custom'] = $data['custom_field'];
$ipn['item_number'] = $data['button_id'];
$ipn['item_name'] = $data['item_name'];
$ipn['pay_id'] = $data['id'];
$ipn['create_time'] = $data['create_time'];
$ipn['txn_id'] = $data['transactions'][0]['related_resources'][0]['sale']['id'];
$ipn['reason_code'] = !empty($data['transactions'][0]['related_resources'][0]['sale']['reason_code']) ? $data['transactions'][0]['related_resources'][0]['sale']['reason_code'] : '';
$ipn['txn_type'] = 'smart_checkout';
$ipn['payment_status'] = ucfirst($data['transactions'][0]['related_resources'][0]['sale']['state']);
$ipn['transaction_subject'] = '';
$ipn['mc_currency'] = $data['transactions'][0]['amount']['currency'];
$ipn['mc_gross'] = $data['transactions'][0]['amount']['total'];
$ipn['quantity'] = 1;
$ipn['receiver_email'] = get_option('cart_paypal_email');
//customer info
$ipn['first_name'] = $data['payer']['payer_info']['first_name'];
$ipn['last_name'] = $data['payer']['payer_info']['last_name'];
$ipn['payer_email'] = $data['payer']['payer_info']['email'];
$ipn['address_street'] = $data['payer']['payer_info']['shipping_address']['line1'];
$ipn['address_city'] = $data['payer']['payer_info']['shipping_address']['city'];
$ipn['address_state'] = $data['payer']['payer_info']['shipping_address']['state'];
$ipn['address_zip'] = $data['payer']['payer_info']['shipping_address']['postal_code'];
$ipn['address_country'] = $data['payer']['payer_info']['shipping_address']['country_code'];
$this->ipn_data = $ipn;
return true;
}
function validate_ipn_smart_checkout() {
if ($this->sandbox_mode) {
$client_id = get_post_meta($this->ipn_data['item_number'], 'pp_smart_checkout_test_id', true);
$secret = get_post_meta($this->ipn_data['item_number'], 'pp_smart_checkout_test_sec', true);
$api_base = 'https://api.sandbox.paypal.com';
} else {
$client_id = get_post_meta($this->ipn_data['item_number'], 'pp_smart_checkout_live_id', true);
$secret = get_post_meta($this->ipn_data['item_number'], 'pp_smart_checkout_live_sec', true);
$api_base = 'https://api.paypal.com';
}
$wp_request_headers = array(
'Accept' => 'application/json',
'Authorization' => 'Basic ' . base64_encode($client_id . ':' . $secret),
);
$res = wp_remote_request(
$api_base . '/v1/oauth2/token', array(
'method' => 'POST',
'headers' => $wp_request_headers,
'body' => 'grant_type=client_credentials',
)
);
$code = wp_remote_retrieve_response_code($res);
if ($code !== 200) {
//Some error occured.
$body = wp_remote_retrieve_body($res);
return sprintf(__('Error occured during payment verification. Error code: %d. Message: %s', "simple-membership"), $code, $body);
}
$body = wp_remote_retrieve_body($res);
$body = json_decode($body);
$token = $body->access_token;
$wp_request_headers = array(
'Accept' => 'application/json',
'Authorization' => 'Bearer ' . $token,
);
$res = wp_remote_request(
$api_base . '/v1/payments/payment/' . $this->ipn_data['pay_id'], array(
'method' => 'GET',
'headers' => $wp_request_headers,
)
);
$code = wp_remote_retrieve_response_code($res);
if ($code !== 200) {
//Some error occured.
$body = wp_remote_retrieve_body($res);
return sprintf(__('Error occured during payment verification. Error code: %d. Message: %s', "simple-membership"), $code, $body);
}
$body = wp_remote_retrieve_body($res);
$body = json_decode($body);
//check payment details
if ($body->transactions[0]->amount->total === $this->ipn_data['mc_gross'] &&
$body->transactions[0]->amount->currency === $this->ipn_data['mc_currency']) {
//payment is valid
return true;
} else {
//payment is invalid
return sprintf(__("Payment check failed: invalid amount received. Expected %s %s, got %s %s.", "simple-membership"), $this->ipn_data['mc_gross'], $this->ipn_data['mc_currency'], $body->transactions[0]->amount->total, $body->transactions[0]->amount->currency);
}
}
function debug_log($message, $success, $end = false) {
SwpmLog::log_simple_debug($message, $success, $end);
}
}
function swpm_pp_smart_checkout_ajax_hanlder() {
// Start of IPN handling (script execution)
if (isset($_POST['swpm_pp_smart_checkout_payment_data'])) {
$data = $_POST['swpm_pp_smart_checkout_payment_data'];
}
if (empty($data)) {
wp_send_json(array('success' => false, 'errMsg' => __('Empty payment data received.', "simple-membership")));
}
$ipn_handler_instance = new swpm_smart_checkout_ipn_handler();
$ipn_data_success = $ipn_handler_instance->create_ipn_from_smart_checkout($data);
if ($ipn_data_success !== true) {
//error occured during IPN array creation
wp_send_json(array('success' => false, 'errMsg' => $ipn_data_success));
}
$settings = SwpmSettings::get_instance();
$debug_enabled = $settings->get_value('enable-debug');
if (!empty($debug_enabled)) {//debug is enabled in the system
$debug_log = "log.txt"; // Debug log file name
$ipn_handler_instance->ipn_log = true;
$ipn_handler_instance->ipn_log_file = $debug_log;
}
$sandbox_enabled = $settings->get_value('enable-sandbox-testing');
if (!empty($sandbox_enabled)) { // Sandbox testing enabled
$ipn_handler_instance->paypal_url = 'https://www.sandbox.paypal.com/cgi-bin/webscr';
$ipn_handler_instance->sandbox_mode = true;
}
$ipn_handler_instance->debug_log('Paypal Smart Checkout Class Initiated by ' . $_SERVER['REMOTE_ADDR'], true);
// Validate the IPN
$res = $ipn_handler_instance->validate_ipn_smart_checkout();
if ($res !== true) {
wp_send_json(array('success' => false, 'errMsg' => $res));
}
$ipn_handler_instance->debug_log('Creating product Information to send.', true);
if (!$ipn_handler_instance->swpm_validate_and_create_membership()) {
$ipn_handler_instance->debug_log('IPN product validation failed.', false);
wp_send_json(array('success' => false, 'errMsg' => __('IPN product validation failed. Check debug log for more details.', "simple-membership")));
}
$ipn_handler_instance->debug_log('Paypal class finished.', true, true);
wp_send_json(array('success' => true));
}
|