Add Stripe donation flow

2026-07-19 22:26:33 -05:00
parent f12904bf73
commit dec5e74aa7
30 changed files with 1053 additions and 1 deletions
@@ -0,0 +1,57 @@
+using Stripe;
+using Stripe.Checkout;
+
+namespace QuestionsApi.Services;
+
+public sealed record StripeCheckoutResult(string SessionId, string CheckoutUrl);
+
+public interface IStripeDonationGateway
+{
+    Task<StripeCheckoutResult> CreateCheckoutAsync(string donationId, long amountCents, CancellationToken cancellationToken);
+}
+
+public sealed class StripeDonationGateway(IConfiguration configuration) : IStripeDonationGateway
+{
+    public async Task<StripeCheckoutResult> CreateCheckoutAsync(string donationId, long amountCents, CancellationToken cancellationToken)
+    {
+        var secretKey = configuration["Stripe:SecretKey"];
+        if (string.IsNullOrWhiteSpace(secretKey)) throw new InvalidOperationException("Stripe secret key is not configured.");
+        var successUrl = configuration["Stripe:SuccessUrl"]
+            ?? "https://doctor.ranaze.com/donation-complete.html?session_id={CHECKOUT_SESSION_ID}";
+        var cancelUrl = configuration["Stripe:CancelUrl"] ?? "https://doctor.ranaze.com/donation-canceled.html";
+        var client = new StripeClient(secretKey);
+        var service = new SessionService(client);
+        var metadata = new Dictionary<string, string> { ["donation_id"] = donationId };
+        var session = await service.CreateAsync(new SessionCreateOptions
+        {
+            Mode = "payment",
+            SuccessUrl = successUrl,
+            CancelUrl = cancelUrl,
+            ClientReferenceId = donationId,
+            CustomerCreation = "always",
+            BillingAddressCollection = "auto",
+            Metadata = metadata,
+            PaymentIntentData = new SessionPaymentIntentDataOptions { Metadata = metadata },
+            LineItems =
+            [
+                new SessionLineItemOptions
+                {
+                    Quantity = 1,
+                    PriceData = new SessionLineItemPriceDataOptions
+                    {
+                        Currency = "usd",
+                        UnitAmount = amountCents,
+                        ProductData = new SessionLineItemPriceDataProductDataOptions
+                        {
+                            Name = "Support MedMind",
+                            Description = "One-time contribution supporting MedMind development and medical education content."
+                        }
+                    }
+                }
+            ]
+        }, null, cancellationToken);
+        if (string.IsNullOrWhiteSpace(session.Id) || string.IsNullOrWhiteSpace(session.Url))
+            throw new InvalidOperationException("Stripe did not return a checkout URL.");
+        return new StripeCheckoutResult(session.Id, session.Url);
+    }
+}