refund roadmap pr-1 and pr-2

features/booking/actions.ts

@@ -5,6 +5,7 @@ import { authOptions } from "@/lib/auth";
 import { tripService } from "@/server/services/trip.service";
 import { paymentService } from "@/server/services/payment.service";
 import { bookingService } from "@/server/services/booking.service";
+import { refundService } from "@/server/services/refund.service";
 import { revalidatePath } from "next/cache";
 
 export async function markParticipantPaidAction(tripId: string) {
@@ -94,3 +95,45 @@ export async function confirmParticipantPaymentAction(
     return { error: (err as Error).message };
   }
 }
+
+/**
+ * Peserta cancel booking PAID dengan refund request. Server menghitung
+ * nominal refund pakai policy default (lib/refund-policy.ts) — client
+ * cuma kirim bookingId untuk cegah tampering.
+ */
+export async function cancelBookingWithRefundAction(tripId: string) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user) {
+    return { error: "Kamu harus login terlebih dahulu" };
+  }
+
+  try {
+    const booking = await bookingService.getByTripAndUser(
+      tripId,
+      session.user.id
+    );
+    if (!booking) {
+      return { error: "Kamu tidak terdaftar di trip ini" };
+    }
+
+    const result = await refundService.requestUserCancellation({
+      bookingId: booking.id,
+      userId: session.user.id,
+    });
+
+    revalidatePath(`/trips/${tripId}`);
+    revalidatePath("/trips");
+    revalidatePath("/");
+    revalidatePath("/profile");
+    revalidatePath("/admin/refunds");
+
+    return {
+      success: true as const,
+      kind: result.kind,
+      refundAmount: result.refundAmount,
+      days: result.days,
+    };
+  } catch (err) {
+    return { error: (err as Error).message };
+  }
+}