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 };
+  }
+}

features/booking/components/cancel-booking-button.tsx

@@ -0,0 +1,161 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import { cancelBookingWithRefundAction } from "@/features/booking/actions";
+import { formatRupiah } from "@/lib/utils";
+
+interface CancelBookingButtonProps {
+  tripId: string;
+  /** Hasil preview server-side (dihitung di trip detail page). */
+  preview: {
+    days: number;
+    refundAmount: number;
+    bookingAmount: number;
+    tierLabel: string;
+  };
+}
+
+type ServerResult =
+  | { kind: "REFUND_PENDING"; refundAmount: number; days: number }
+  | { kind: "CANCELLED_NO_REFUND"; days: number };
+
+export function CancelBookingButton({ tripId, preview }: CancelBookingButtonProps) {
+  const router = useRouter();
+  const [open, setOpen] = useState(false);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState("");
+  const [result, setResult] = useState<ServerResult | null>(null);
+
+  async function handleConfirm() {
+    setLoading(true);
+    setError("");
+    const res = await cancelBookingWithRefundAction(tripId);
+    setLoading(false);
+    if ("error" in res) {
+      setError(res.error ?? "Terjadi kesalahan");
+      return;
+    }
+    setResult({
+      kind: res.kind,
+      refundAmount: res.refundAmount,
+      days: res.days,
+    } as ServerResult);
+    router.refresh();
+  }
+
+  if (result?.kind === "REFUND_PENDING") {
+    return (
+      <div className="rounded-2xl border border-amber-200 bg-amber-50 p-4 text-sm text-amber-900">
+        <p className="font-semibold">Request refund dibuat.</p>
+        <p className="mt-1 text-xs">
+          Refund <span className="font-bold">{formatRupiah(result.refundAmount)}</span>{" "}
+          menunggu review admin. Setelah disetujui dan ditransfer manual, slot
+          kamu di trip akan otomatis dibebaskan.
+        </p>
+      </div>
+    );
+  }
+
+  if (result?.kind === "CANCELLED_NO_REFUND") {
+    return (
+      <div className="rounded-2xl border border-neutral-200 bg-neutral-50 p-4 text-sm text-neutral-700">
+        <p className="font-semibold">Booking dibatalkan.</p>
+        <p className="mt-1 text-xs">
+          Pembatalan di H-{result.days} berada di luar window refund — tidak
+          ada nominal yang dikembalikan.
+        </p>
+      </div>
+    );
+  }
+
+  if (!open) {
+    return (
+      <button
+        type="button"
+        onClick={() => setOpen(true)}
+        className="w-full rounded-xl border-2 border-red-200 py-3 text-sm font-bold text-red-600 transition-colors hover:bg-red-50"
+      >
+        Cancel & Request Refund
+      </button>
+    );
+  }
+
+  const percentage = preview.bookingAmount
+    ? Math.floor((preview.refundAmount * 100) / preview.bookingAmount)
+    : 0;
+  const noRefund = preview.refundAmount === 0;
+
+  return (
+    <div className="space-y-3 rounded-2xl border-2 border-red-200 bg-red-50 p-4 text-sm">
+      <div>
+        <p className="font-bold text-red-900">Cancel booking?</p>
+        <p className="mt-1 text-xs text-red-800/80">
+          Kamu cancel di <span className="font-semibold">H-{preview.days}</span>{" "}
+          dari tanggal berangkat.
+        </p>
+      </div>
+
+      <div className="rounded-xl border border-red-200 bg-white p-3">
+        <p className="text-xs font-semibold uppercase tracking-wide text-neutral-500">
+          Estimasi refund (sesuai policy)
+        </p>
+        <p className="mt-1 text-lg font-bold text-neutral-900">
+          {formatRupiah(preview.refundAmount)}
+          {!noRefund && (
+            <span className="ml-2 text-xs font-medium text-neutral-500">
+              ({percentage}% dari {formatRupiah(preview.bookingAmount)})
+            </span>
+          )}
+        </p>
+        <p className="mt-1 text-[11px] text-neutral-500">
+          Tier: {preview.tierLabel}
+        </p>
+        {noRefund ? (
+          <p className="mt-2 text-xs text-red-700">
+            ⚠️ Di luar window refund — uang tidak dikembalikan. Booking akan
+            di-cancel langsung.
+          </p>
+        ) : (
+          <p className="mt-2 text-xs text-neutral-600">
+            Refund akan masuk antrian review admin. Setelah disetujui & uang
+            ditransfer, booking otomatis ditandai{" "}
+            {percentage === 100 ? "REFUNDED" : "PARTIALLY_REFUNDED"}.
+          </p>
+        )}
+      </div>
+
+      {error && (
+        <div className="rounded-lg bg-white px-3 py-2 text-xs font-medium text-red-700">
+          {error}
+        </div>
+      )}
+
+      <div className="flex flex-wrap gap-2">
+        <button
+          type="button"
+          onClick={handleConfirm}
+          disabled={loading}
+          className="rounded-xl bg-red-600 px-4 py-2 text-sm font-bold text-white hover:bg-red-700 disabled:opacity-50"
+        >
+          {loading
+            ? "Memproses…"
+            : noRefund
+              ? "Konfirmasi Cancel"
+              : "Konfirmasi & Request Refund"}
+        </button>
+        <button
+          type="button"
+          onClick={() => {
+            setOpen(false);
+            setError("");
+          }}
+          disabled={loading}
+          className="rounded-xl border border-red-200 bg-white px-4 py-2 text-sm font-medium text-red-700 hover:bg-red-100 disabled:opacity-50"
+        >
+          Batal
+        </button>
+      </div>
+    </div>
+  );
+}