Extend seat hold time if booking created

apps/edr-passenger-api/src/common/utils/payment-deadline.utils.ts

@@ -0,0 +1,22 @@
+/**
+ * Single source of truth for how long a PENDING_PAYMENT booking has to be paid for,
+ * shared by TasksService (which auto-cancels bookings past this deadline) and
+ * SeatsService (which extends the seat hold to cover exactly this window when a
+ * booking/PNR is created — without this, the seat hold reverted to its original
+ * short seat-selection TTL and could expire mid-payment, letting a second customer
+ * grab the same seat).
+ */
+
+/** Maximum time (hours) a passenger has to pay after booking. */
+export const MAX_PAYMENT_HOURS = 2;
+/** Minutes before departure: cutoff for new bookings and payment deadline. */
+export const CUTOFF_MINUTES = 30;
+
+/**
+ * payment_deadline = MIN(booking_time + 2h, departure_time - 30min)
+ */
+export function computePaymentDeadline(createdAt: Date, departureAt: Date): Date {
+  const maxDeadline    = new Date(createdAt.getTime() + MAX_PAYMENT_HOURS * 60 * 60 * 1000);
+  const cutoffDeadline = new Date(departureAt.getTime() - CUTOFF_MINUTES * 60 * 1000);
+  return maxDeadline < cutoffDeadline ? maxDeadline : cutoffDeadline;
+}