/**
* Override the default PayPal standard args in WooCommerce for subscription purchases when
* automatic payments are enabled and when the recurring order totals is over $0.00 (because
* PayPal doesn't support subscriptions with a $0 recurring total, we need to circumvent it and
* manage it entirely ourselves.)
*
* Based on the HTML Variables documented here: https://developer.paypal.com/webapps/developer/docs/classic/paypal-payments-standard/integration-guide/Appx_websitestandard_htmlvariables/#id08A6HI00JQU
*
* @since 1.0
*/
public static function paypal_standard_subscription_args($paypal_args)
{
extract(self::get_order_id_and_key($paypal_args));
$order = new WC_Order($order_id);
if ($cart_item = WC_Subscriptions_Cart::cart_contains_failed_renewal_order_payment() || false !== WC_Subscriptions_Renewal_Order::get_failed_order_replaced_by($order_id)) {
$renewal_order = $order;
$order = WC_Subscriptions_Renewal_Order::get_parent_order($renewal_order);
$order_contains_failed_renewal = true;
} else {
$order_contains_failed_renewal = false;
}
if ($order_contains_failed_renewal || WC_Subscriptions_Order::order_contains_subscription($order) && WC_Subscriptions_Order::get_recurring_total($order) > 0 && 'yes' !== get_option(WC_Subscriptions_Admin::$option_prefix . '_turn_off_automatic_payments', 'no')) {
// Only one subscription allowed in the cart when PayPal Standard is active
$product = $order->get_product_from_item(array_pop(WC_Subscriptions_Order::get_recurring_items($order)));
// It's a subscription
$paypal_args['cmd'] = '_xclick-subscriptions';
if (count($order->get_items()) > 1) {
foreach ($order->get_items() as $item) {
if ($item['qty'] > 1) {
$item_names[] = $item['qty'] . ' x ' . self::paypal_item_name($item['name']);
} elseif ($item['qty'] > 0) {
$item_names[] = self::paypal_item_name($item['name']);
}
}
$paypal_args['item_name'] = self::paypal_item_name(sprintf(__('Order %s', 'woocommerce-subscriptions'), $order->get_order_number() . " - " . implode(', ', $item_names)));
} else {
$paypal_args['item_name'] = self::paypal_item_name($product->get_title());
}
$unconverted_periods = array('billing_period' => WC_Subscriptions_Order::get_subscription_period($order), 'trial_period' => WC_Subscriptions_Order::get_subscription_trial_period($order));
$converted_periods = array();
// Convert period strings into PayPay's format
foreach ($unconverted_periods as $key => $period) {
switch (strtolower($period)) {
case 'day':
$converted_periods[$key] = 'D';
break;
case 'week':
$converted_periods[$key] = 'W';
break;
case 'year':
$converted_periods[$key] = 'Y';
break;
case 'month':
default:
$converted_periods[$key] = 'M';
break;
}
}
$price_per_period = WC_Subscriptions_Order::get_recurring_total($order);
$subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order);
$subscription_length = WC_Subscriptions_Order::get_subscription_length($order);
$subscription_installments = $subscription_length / $subscription_interval;
$is_payment_change = WC_Subscriptions_Change_Payment_Gateway::$is_request_to_change_payment;
$is_switch_order = WC_Subscriptions_Switcher::order_contains_subscription_switch($order->id);
$is_synced_subscription = WC_Subscriptions_Synchroniser::order_contains_synced_subscription($order->id);
$sign_up_fee = $is_payment_change ? 0 : WC_Subscriptions_Order::get_sign_up_fee($order);
$initial_payment = $is_payment_change ? 0 : WC_Subscriptions_Order::get_total_initial_payment($order);
if ($is_payment_change) {
// Add a nonce to the order ID to avoid "This invoice has already been paid" error when changing payment method to PayPal when it was previously PayPal
$paypal_args['invoice'] = $paypal_args['invoice'] . '-wcscpm-' . wp_create_nonce();
} elseif ($order_contains_failed_renewal) {
// Set the invoice details to the original order's invoice but also append a special string and this renewal orders ID so that we can match it up as a failed renewal order payment later
$paypal_args['invoice'] = self::$invoice_prefix . ltrim($order->get_order_number(), '#') . '-wcsfrp-' . $renewal_order->id;
$paypal_args['custom'] = serialize(array($order->id, $order->order_key));
}
if ($order_contains_failed_renewal) {
$sign_up_fee = 0;
$initial_payment = $renewal_order->get_total();
// Initial payment can be left in case the customer is purchased other products with the payment
$subscription_trial_length = 0;
$subscription_installments = max($subscription_installments - WC_Subscriptions_Manager::get_subscriptions_completed_payment_count(WC_Subscriptions_Manager::get_subscription_key($order_id, $product->id)), 0);
// If we're changing the payment date or switching subs, we need to set the trial period to the next payment date & installments to be the number of installments left
} elseif ($is_payment_change || $is_switch_order || $is_synced_subscription) {
$subscription_key = WC_Subscriptions_Manager::get_subscription_key($order_id, $product->id);
// Give a free trial until the next payment date
if ($is_switch_order) {
$next_payment_timestamp = get_post_meta($order->id, '_switched_subscription_first_payment_timestamp', true);
} elseif ($is_synced_subscription) {
$next_payment_timestamp = WC_Subscriptions_Synchroniser::calculate_first_payment_date($product, 'timestamp');
} else {
$next_payment_timestamp = WC_Subscriptions_Manager::get_next_payment_date($subscription_key, $order->user_id, 'timestamp');
}
// When the subscription is on hold
if ($next_payment_timestamp != false && !empty($next_payment_timestamp)) {
$trial_until = self::calculate_trial_periods_until($next_payment_timestamp);
$subscription_trial_length = $trial_until['first_trial_length'];
$converted_periods['trial_period'] = $trial_until['first_trial_period'];
$second_trial_length = $trial_until['second_trial_length'];
$second_trial_period = $trial_until['second_trial_period'];
} else {
$subscription_trial_length = 0;
}
// If is a payment change, we need to account for completed payments on the number of installments owing
if ($is_payment_change && $subscription_length > 0) {
$subscription_installments -= WC_Subscriptions_Manager::get_subscriptions_completed_payment_count($subscription_key);
}
} else {
$subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order);
}
if ($subscription_trial_length > 0) {
// Specify a free trial period
if ($is_switch_order || $is_synced_subscription || $initial_payment != $sign_up_fee) {
$paypal_args['a1'] = $initial_payment > 0 ? $initial_payment : 0;
} else {
$paypal_args['a1'] = $sign_up_fee > 0 ? $sign_up_fee : 0;
// Maybe add the sign up fee to the free trial period
}
// Trial period length
$paypal_args['p1'] = $subscription_trial_length;
// Trial period
$paypal_args['t1'] = $converted_periods['trial_period'];
// We need to use a second trial period before we have more than 90 days until the next payment
if (isset($second_trial_length) && $second_trial_length > 0) {
$paypal_args['a2'] = 0.01;
// Alas, although it's undocumented, PayPal appears to require a non-zero value in order to allow a second trial period
$paypal_args['p2'] = $second_trial_length;
$paypal_args['t2'] = $second_trial_period;
}
} elseif ($sign_up_fee > 0 || $initial_payment != $price_per_period) {
// No trial period, so charge sign up fee and per period price for the first period
if ($subscription_installments == 1) {
$param_number = 3;
} else {
$param_number = 1;
}
$paypal_args['a' . $param_number] = $initial_payment;
// Sign Up interval
$paypal_args['p' . $param_number] = $subscription_interval;
// Sign Up unit of duration
$paypal_args['t' . $param_number] = $converted_periods['billing_period'];
}
// We have a recurring payment
if (!isset($param_number) || $param_number == 1) {
// Subscription price
$paypal_args['a3'] = $price_per_period;
// Subscription duration
$paypal_args['p3'] = $subscription_interval;
// Subscription period
$paypal_args['t3'] = $converted_periods['billing_period'];
}
// Recurring payments
if ($subscription_installments == 1 || $sign_up_fee > 0 && $subscription_trial_length == 0 && $subscription_installments == 2) {
// Non-recurring payments
$paypal_args['src'] = 0;
} else {
$paypal_args['src'] = 1;
if ($subscription_installments > 0) {
if ($sign_up_fee > 0 && $subscription_trial_length == 0) {
// An initial period is being used to charge a sign-up fee
$subscription_installments--;
}
$paypal_args['srt'] = $subscription_installments;
}
}
// Don't reattempt failed payments, instead let Subscriptions handle the failed payment
$paypal_args['sra'] = 0;
// Force return URL so that order description & instructions display
$paypal_args['rm'] = 2;
}
return $paypal_args;
}
