fix error in gitignore

2026-09-24 12:32:59 +03:30
commit 86c117ee2a
165 changed files with 5963 additions and 0 deletions
@@ -0,0 +1,91 @@
+from django.db import transaction
+from django.utils import timezone
+
+from apps.core.errors import ApiError
+from apps.reservations.models import Reservation, Slot
+
+
+class ReservationService:
+    """Booking with backend-enforced availability, double-booking prevention,
+    and admin approval (which triggers a customer SMS)."""
+
+    @transaction.atomic
+    def book(self, customer, slot, title: str = "", notes: str = "") -> Reservation:
+        slot = Slot.objects.select_for_update().get(pk=slot.pk)
+        if slot.blocked:
+            raise ApiError("SLOT_BLOCKED", "This slot is blocked.")
+        if slot.date < timezone.localdate():
+            raise ApiError("SLOT_PAST", "Cannot book a slot in the past.")
+        if slot.booked_count >= slot.capacity:
+            raise ApiError("SLOT_FULL", "This slot is fully booked.")
+        slot.booked_count += 1
+        slot.save(update_fields=["booked_count"])
+        return Reservation.objects.create(
+            customer=customer,
+            slot=slot,
+            title=title,
+            status=Reservation.Status.PENDING,
+            notes=notes,
+        )
+
+    @transaction.atomic
+    def approve(self, reservation, user) -> Reservation:
+        reservation = Reservation.objects.select_for_update().select_related("slot", "customer").get(pk=reservation.pk)
+        if reservation.status != Reservation.Status.PENDING:
+            raise ApiError("INVALID_STATUS", "Only pending reservations can be approved.")
+        reservation.status = Reservation.Status.CONFIRMED
+        reservation.approved_by = user
+        reservation.approved_at = timezone.now()
+        reservation.save(update_fields=["status", "approved_by", "approved_at"])
+
+        from apps.notifications.services import NotificationService
+
+        customer = reservation.customer
+        NotificationService().send_event(
+            "reservation.approved",
+            {
+                "customer_name": customer.company_name or customer.user.get_full_name() or customer.user.username,
+                "reservation_title": reservation.title,
+                "slot_date": str(reservation.slot.date),
+                "slot_time": str(reservation.slot.start_time),
+            },
+            recipient=customer.user.phone or customer.user.username,
+        )
+        return reservation
+
+    @transaction.atomic
+    def reject(self, reservation, user) -> Reservation:
+        reservation = Reservation.objects.select_for_update().select_related("slot").get(pk=reservation.pk)
+        if reservation.status not in (Reservation.Status.PENDING, Reservation.Status.CONFIRMED):
+            raise ApiError("INVALID_STATUS", "This reservation cannot be rejected.")
+        reservation.status = Reservation.Status.REJECTED
+        reservation.approved_by = user
+        reservation.approved_at = timezone.now()
+        reservation.save(update_fields=["status", "approved_by", "approved_at"])
+        slot = reservation.slot
+        slot.booked_count = max(0, slot.booked_count - 1)
+        slot.save(update_fields=["booked_count"])
+        return reservation
+
+    @transaction.atomic
+    def cancel(self, reservation) -> Reservation:
+        reservation = (
+            Reservation.objects.select_for_update()
+            .select_related("slot")
+            .get(pk=reservation.pk)
+        )
+        if reservation.status == Reservation.Status.CANCELLED:
+            return reservation
+        if reservation.status == Reservation.Status.WEIGHED:
+            raise ApiError("RESERVATION_LOCKED", "Cannot cancel a reservation that has been weighed.")
+        reservation.status = Reservation.Status.CANCELLED
+        reservation.save(update_fields=["status"])
+        slot = reservation.slot
+        slot.booked_count = max(0, slot.booked_count - 1)
+        slot.save(update_fields=["booked_count"])
+        return reservation
+
+    @transaction.atomic
+    def reschedule(self, reservation, new_slot) -> Reservation:
+        self.cancel(reservation)
+        return self.book(reservation.customer, new_slot, title=reservation.title)