changes export flow

apps/edr-freight-api/src/modules/train-scheduling/booking-notifier.service.ts

@@ -137,6 +137,25 @@ export class BookingNotifierService {
     });
   }
 
+  /** One warning shortly before the pay window closes (sent once per hold). */
+  async payDeadlineApproaching(b: Booking, deadline: Date): Promise<void> {
+    const minutesLeft = Math.max(
+      1,
+      Math.round((deadline.getTime() - Date.now()) / 60_000),
+    );
+    const eat = deadline.toLocaleString('en-GB', { timeZone: 'Africa/Addis_Ababa' });
+    const msg =
+      `Payment reminder: about ${minutesLeft} minute${minutesLeft === 1 ? '' : 's'} left ` +
+      `to pay for booking ${b.reference ?? b.id}. Deadline: ${eat} EAT — ` +
+      `unpaid reservations are released and the wagons go back on sale.`;
+    await this.notifyContact(b, msg, 'PAY REMINDER');
+    // HIGH: minutes from losing the reserved wagons — must reach SMS/email.
+    this.inApp(b, 'Payment deadline approaching', msg, {
+      type: NotificationType.INVOICE_ISSUED,
+      priority: NotificationPriority.HIGH,
+    });
+  }
+
   /**
    * Partial-capacity offer: only `offeredWagons` of the booking's `totalWagons` fit
    * this train. Paying accepts the split; letting the deadline pass keeps the