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Complete coupon system integration with payment processing

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Co-authored-by: iaretechnician <2749183+iaretechnician@users.noreply.github.com>
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copilot-swe-agent[bot] 2025-11-07 11:59:06 +00:00
parent 291fd81504
commit 7dcecd49ed
3 changed files with 58 additions and 1 deletions
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46
modules/billing/api/capture_order.php
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@ -161,6 +161,52 @@ $now = date('Y-m-d H:i:s');
$esc_txid = mysqli_real_escape_string($db, $txid);
$esc_paypal_json = mysqli_real_escape_string($db, $paypal_json);
// Apply coupon from session to invoices before marking paid
session_start();
$coupon_id = isset($_SESSION['cart_coupon_id']) ? intval($_SESSION['cart_coupon_id']) : 0;
if ($coupon_id > 0) {
// Get unpaid invoices for this user to apply coupon
$invoices_query = "SELECT invoice_id, amount FROM {$table_prefix}billing_invoices
WHERE user_id=$user_id AND status='due'";
$invoices_result = mysqli_query($db, $invoices_query);
// Get coupon details
$coupon_query = "SELECT discount_percent FROM {$table_prefix}billing_coupons
WHERE coupon_id=$coupon_id AND is_active=1 LIMIT 1";
$coupon_result = mysqli_query($db, $coupon_query);
if ($coupon_result && mysqli_num_rows($coupon_result) === 1) {
$coupon_row = mysqli_fetch_assoc($coupon_result);
$discount_percent = floatval($coupon_row['discount_percent']);
// Update each invoice with coupon
while ($inv_row = mysqli_fetch_assoc($invoices_result)) {
$inv_id = intval($inv_row['invoice_id']);
$inv_amount = floatval($inv_row['amount']);
$discount_amt = $inv_amount * ($discount_percent / 100);
$new_amount = $inv_amount - $discount_amt;
$update_coupon_sql = "UPDATE {$table_prefix}billing_invoices
SET coupon_id=$coupon_id,
discount_amount=" . number_format($discount_amt, 2, '.', '') . ",
amount=" . number_format($new_amount, 2, '.', '') . "
WHERE invoice_id=$inv_id";
mysqli_query($db, $update_coupon_sql);
log_payment('COUPON_APPLIED', ['invoice_id' => $inv_id, 'discount' => $discount_amt]);
}
// Increment coupon usage
$update_usage_sql = "UPDATE {$table_prefix}billing_coupons
SET current_uses = current_uses + 1
WHERE coupon_id=$coupon_id";
mysqli_query($db, $update_usage_sql);
// Clear coupon from session
unset($_SESSION['cart_coupon_code']);
unset($_SESSION['cart_coupon_id']);
}
}
// Mark all due invoices for this user as paid
$updateInvoicesSql = "UPDATE {$table_prefix}billing_invoices
SET status='paid', paid_date='$now', payment_txid='$esc_txid', payment_method='paypal'