Fix Inventory Quantity Is Not Decremented When Job Card Is Created

Changes:

- Added retrieval of tracked service bookings and inventory items in
  ServiceManagementService::createJobCard().
- Validated service booking ID and inventory item indices before
  proceeding with job card creation.
- Decremented inventory item quantities when job cards are created and
  marked corresponding tracked inventory records as MODIFIED.
- Updated tracked service booking state to MODIFIED when technician is
  assigned and job status changes.
- Persisted changes by saving job cards, service bookings, and inventory
  items to the datastore.

Fixes #2075

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/ServiceManagementService.cpp

@@ -596,6 +596,14 @@ void ServiceManagementService::createJobCard(const std::string& bookingID, const
 	UserManagementService m_userManagementService;
 	ServiceBooking* currentBooking = getServiceBooking(bookingID);
 	auto& currentTrackedJobCards = m_dataStore.getJobCards();
+    auto& currentTrackedInventoryItems = m_dataStore.getInventoryItems();
+    auto& currentTrackedServiceBookings = m_dataStore.getServiceBookings();
+    int currentTrackedServiceBookingIndex = currentTrackedServiceBookings.find(bookingID);
+    if (currentTrackedServiceBookingIndex == -1)
+    {
+        throw std::runtime_error("Invalid service booking id.");
+    }
+    auto& currentTrackedServiceBooking = currentTrackedServiceBookings.getValueAt(currentTrackedServiceBookingIndex);
 	if (currentBooking == nullptr)
 	{
 		throw std::runtime_error("Service Booking not available");
@@ -624,10 +632,18 @@ void ServiceManagementService::createJobCard(const std::string& bookingID, const
 	for (int iterator = 0; iterator < inventoryItems.getSize(); iterator++)
 	{
 		InventoryItem* currentInventoryItem = inventoryItems.getValueAt(iterator);
+        const std::string& currentInventoryItemId = inventoryItems.getKeyAt(iterator);
 		if (currentInventoryItem)
 		{
+            int trackedCurrentInventoryItemIndex = currentTrackedInventoryItems.find(currentInventoryItemId);
+            if (trackedCurrentInventoryItemIndex == -1)
+            {
+                throw std::runtime_error("Invalid inventory item index.");
+            }
+            auto& trackedCurrentInventoryItem = currentTrackedInventoryItems.getValueAt(trackedCurrentInventoryItemIndex);
 			int currentStockQuantity = currentInventoryItem->getQuantity();
 			currentInventoryItem->setQuantity(currentStockQuantity - 1);
+            trackedCurrentInventoryItem.state = RecordState::MODIFIED;
 		}
 	}
 	currentBooking->setAssignedTechnician(selectedTechnician);
@@ -636,6 +652,7 @@ void ServiceManagementService::createJobCard(const std::string& bookingID, const
     {
         currentBooking->setStatus(util::ServiceJobStatus::STARTED);
     }
+    currentTrackedServiceBooking.state = RecordState::MODIFIED;
 	std::string title = "Job card created";
 	std::string message = "Job card created for the service and you are assigned for that.";
 	JobCard* jobCard = Factory::getObject<JobCard>(bookingID, currentBooking, currentService, serviceID, technicianID, selectedTechnician, util::Timestamp(), util::ServiceJobStatus::STARTED, util::Timestamp());
@@ -652,6 +669,8 @@ void ServiceManagementService::createJobCard(const std::string& bookingID, const
     message = "A technician has been assigned to your Service Booking with ID " + bookingID;
     sendNotification(currentBooking->getCustomer(), title, message);
     m_dataStore.saveJobCards();
+    m_dataStore.saveServiceBookings();
+    m_dataStore.saveInventoryItems();
 }
 
 /*