Add Stripe Customer creation to save payment methods

- Get user info (StripeCustomerId, email, name) when creating PaymentIntent
- Create Stripe Customer if user doesn't have one
- Add customer and setup_future_usage=off_session to PaymentIntent
- Cards are automatically saved after successful payment

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

api/stripe/createPaymentIntent.cfm

@@ -73,11 +73,14 @@ try {
         abort;
     }
 
-    // Get order's delivery fee, grant economics, and existing PaymentIntent
+    // Get order's delivery fee, grant economics, existing PaymentIntent, and user info
     qOrder = queryExecute("
-        SELECT DeliveryFee, OrderTypeID, GrantID, GrantOwnerBusinessID, GrantEconomicsType, GrantEconomicsValue, StripePaymentIntentID
+        SELECT o.DeliveryFee, o.OrderTypeID, o.GrantID, o.GrantOwnerBusinessID,
-        FROM Orders
+               o.GrantEconomicsType, o.GrantEconomicsValue, o.StripePaymentIntentID,
-        WHERE ID = :orderID
+               o.UserID, u.StripeCustomerId, u.EmailAddress, u.FirstName, u.LastName
+        FROM Orders o
+        LEFT JOIN Users u ON u.ID = o.UserID
+        WHERE o.ID = :orderID
     ", { orderID: orderID }, { datasource: "payfrit" });
 
     // Check if order already has a PaymentIntent (idempotency check)
@@ -137,6 +140,50 @@ try {
     totalAmountCents = round(totalCustomerPays * 100);
     totalPlatformFeeCents = round((payfritCustomerFee + payfritBusinessFee) * 100);
 
+    // ============================================================
+    // STRIPE CUSTOMER (for saving payment methods)
+    // ============================================================
+    stripeCustomerId = "";
+    orderUserID = val(qOrder.UserID ?: 0);
+
+    if (orderUserID > 0) {
+        stripeCustomerId = qOrder.StripeCustomerId ?: "";
+
+        // Create Stripe Customer if user doesn't have one
+        if (len(trim(stripeCustomerId)) == 0) {
+            customerService = new http();
+            customerService.setMethod("POST");
+            customerService.setUrl("https://api.stripe.com/v1/customers");
+            customerService.setUsername(stripeSecretKey);
+            customerService.setPassword("");
+
+            // Build customer name
+            customerName = trim((qOrder.FirstName ?: "") & " " & (qOrder.LastName ?: ""));
+            if (len(customerName) > 0) {
+                customerService.addParam(type="formfield", name="name", value=customerName);
+            }
+            if (len(trim(qOrder.EmailAddress ?: "")) > 0) {
+                customerService.addParam(type="formfield", name="email", value=qOrder.EmailAddress);
+            }
+            customerService.addParam(type="formfield", name="metadata[user_id]", value=orderUserID);
+
+            customerResult = customerService.send().getPrefix();
+            customerData = deserializeJSON(customerResult.fileContent);
+
+            if (!structKeyExists(customerData, "error") && structKeyExists(customerData, "id")) {
+                stripeCustomerId = customerData.id;
+                // Save to Users table
+                queryExecute("
+                    UPDATE Users SET StripeCustomerId = :custId WHERE ID = :userId
+                ", {
+                    custId: stripeCustomerId,
+                    userId: orderUserID
+                }, { datasource: "payfrit" });
+                writeLog(file="stripe_webhooks", text="Created Stripe Customer #stripeCustomerId# for user #orderUserID#");
+            }
+        }
+    }
+
     // Create PaymentIntent
     httpService = new http();
     httpService.setMethod("POST");
@@ -151,6 +198,12 @@ try {
     httpService.addParam(type="formfield", name="currency", value="usd");
     httpService.addParam(type="formfield", name="automatic_payment_methods[enabled]", value="true");
 
+    // Attach customer and save payment method for future use
+    if (len(trim(stripeCustomerId)) > 0) {
+        httpService.addParam(type="formfield", name="customer", value=stripeCustomerId);
+        httpService.addParam(type="formfield", name="setup_future_usage", value="off_session");
+    }
+
     if (hasStripeConnect) {
         // SP-SM: Add grant owner fee to platform fee (Payfrit collects, then transfers to owner)
         effectivePlatformFeeCents = totalPlatformFeeCents + grantOwnerFeeCents;