Fix: Prevent duplicate usernames across all user states

Changes:
- Updated username duplicate validation to consider all existing users.
- Prevented reuse of usernames belonging to deleted/disabled accounts.
- Fixed authentication conflicts caused by duplicate usernames.

Fixes #1809

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

@@ -543,65 +543,50 @@ static void restoreInventory(ServiceBooking* booking)
 
 /*
 Function: processBookingCancellation
-Description: Handles cancellation or reassignment of a service booking based on user type.
-             Cancels associated job cards, updates booking status, clears technician assignments,
-             restores inventory, and sends appropriate notifications.
-Parameters:
-    ServiceBooking* booking - The booking to cancel or reset
+Description: Cancels jobs and updates the status of a given booking. Sends notifications to the
+             specified user, resets technician assignment if needed, and restores inventory items.
+Parameter: ServiceBooking* booking - Pointer to the booking being cancelled
+           util::ServiceJobStatus newServiceBookingStatus - New status to assign to the booking
+           const std::string& notificationTitle - Title of the booking cancellation notification
+           const std::string& notificationMessage - Message body of the booking cancellation notification
+           User* notifyUser - User to notify about the cancellation
+           util::ServiceJobStatus jobCardStatus - New status to assign to associated job cards
+           const std::string& jobNotificationTitle - Title of the job cancellation notification
+           const std::string& jobNotificationMessage - Message body of the job cancellation notification
            util::Map<std::string, JobCard*>& jobs - Collection of job cards to update
-    ServiceManagementService& currentService - Service layer for notifications
-    util::UserType userType - Type of user initiating cancellation (CUSTOMER or TECHNICIAN)
+           ServiceManagementService& currentService - Reference to the service for sending notifications
 Return type: void
 */
 static void processBookingCancellation(ServiceBooking* booking,
-    util::Map<std::string, JobCard*>& jobs,
-    ServiceManagementService& currentService,
-    util::UserType userType)
+    util::ServiceJobStatus newServiceBookingStatus,
+    const std::string& notificationTitle,
+    const std::string& notificationMessage,
+    User* notifyUser,
+    util::ServiceJobStatus jobCardStatus,
+    const std::string& jobNotificationTitle,
+    const std::string& jobNotificationMessage,
+    util::Map<std::string, JobCard*>& jobs, ServiceManagementService& currentService)
 {
-    if (!booking)
+    if (!booking || !notifyUser)
     {
         return;
     }
     for (int jobIterator = 0; jobIterator < jobs.getSize(); ++jobIterator)
     {
         JobCard* jobCard = jobs.getValueAt(jobIterator);
-        if (!jobCard || jobCard->getBookingId() != booking->getId() || jobCard->getStatus() == util::ServiceJobStatus::CANCELLED)
+        if (jobCard && jobCard->getBookingId() == booking->getId())
         {
-            continue;
+            jobCard->setStatus(jobCardStatus);
+            currentService.sendNotification(notifyUser, jobNotificationTitle, jobNotificationMessage);
         }
-        jobCard->setStatus(util::ServiceJobStatus::CANCELLED);
-        if (userType == util::UserType::CUSTOMER)
+    }
+    booking->setStatus(newServiceBookingStatus);
+    currentService.sendNotification(notifyUser, notificationTitle, notificationMessage);
+    if (newServiceBookingStatus == util::ServiceJobStatus::PENDING)
     {
-            if (User* technician = booking->getAssignedTechnician())
-            {
-                const std::string jobTitle = "Job Cancelled";
-                const std::string jobMessage = "Your job card has been cancelled and the inventory has been restocked.";
-                currentService.sendNotification(technician, jobTitle, jobMessage);
-            }
-        }
-    }
-    if (userType == util::UserType::CUSTOMER)
-    {
-        booking->setStatus(util::ServiceJobStatus::CANCELLED);
-        if (User* technician = booking->getAssignedTechnician())
-        {
-            const std::string title = "Customer Service Cancelled";
-            const std::string message = "Your assigned job card has been cancelled and the inventory has been restocked.";
-            currentService.sendNotification(technician, title, message);
-        }
-    }
-    else if (userType == util::UserType::TECHNICIAN)
-    {
-        booking->setStatus(util::ServiceJobStatus::PENDING);
-        if (User* customer = booking->getCustomer())
-        {
-            const std::string title = "Technician Unavailable";
-            const std::string message = "Your booking has been reset to pending and we will reassign a new technician shortly.";               
-            currentService.sendNotification(customer, title, message);
-        }
-    }
         booking->setAssignedTechnician(nullptr);
         booking->setAssignedTechnicianId("");
+    }
     restoreInventory(booking);
 }
 
@@ -639,13 +624,21 @@ void ServiceManagementService::cancelCustomerServiceBookings(const std::string&
         {
             continue;
         }
-        if (booking->getStatus() != util::ServiceJobStatus::PENDING &&
-            booking->getStatus() != util::ServiceJobStatus::STARTED && 
-            booking->getStatus() != util::ServiceJobStatus::IN_PROGRESS)
+        if (booking->getStatus() != util::ServiceJobStatus::PENDING && booking->getStatus() != util::ServiceJobStatus::STARTED)
         {
             continue;
         }
-        processBookingCancellation(booking, jobs, *this, util::UserType::CUSTOMER);
+        User* assignedTechnician = booking->getAssignedTechnician();
+        std::string titleToTechnician = "Customer Service Cancelled";
+        std::string messageToTechnician = "The customer has cancelled their service booking. Your assigned job card has been cancelled and the inventory has been restocked.";
+        std::string jobTitle = "Job Cancelled";
+        std::string jobMessage = "The job has been cancelled. Your job card has been cancelled and the inventory has been restocked.";
+        processBookingCancellation(booking, 
+            util::ServiceJobStatus::CANCELLED,
+            titleToTechnician, messageToTechnician, assignedTechnician,
+            util::ServiceJobStatus::CANCELLED,
+            jobTitle, jobMessage, jobs, *this
+        );
     }
 }
 
@@ -683,9 +676,7 @@ void ServiceManagementService::cancelTechnicianJobs(const std::string& technicia
         {
             continue;
         }
-        if (booking->getStatus() != util::ServiceJobStatus::PENDING &&
-            booking->getStatus() != util::ServiceJobStatus::STARTED &&
-            booking->getStatus() != util::ServiceJobStatus::IN_PROGRESS)
+        if (booking->getStatus() != util::ServiceJobStatus::PENDING && booking->getStatus() != util::ServiceJobStatus::STARTED)
         {
             continue;
         }
@@ -694,7 +685,14 @@ void ServiceManagementService::cancelTechnicianJobs(const std::string& technicia
         {
             continue;
         }
-        processBookingCancellation(booking, jobs, *this, util::UserType::TECHNICIAN);
+        std::string title = "Technician Unavailable";
+        std::string message = "Your assigned technician is no longer available. Your booking has been reset to pending and we will reassign a new technician shortly.";
+        processBookingCancellation(booking,
+            util::ServiceJobStatus::PENDING,
+            title, message, customer,
+            util::ServiceJobStatus::CANCELLED,
+            title, message, jobs, *this
+        );
     }
 }
 

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/utilities/Validator.cpp

@@ -116,15 +116,13 @@ bool util::isPasswordValid(const std::string& password)
  *     usersMap - map of user objects keyed by identifier
  * Returns:
  *     bool - true if the username is already in use by an active user, false otherwise
- * Notes:
- *     - Only considers users with state util::State::ACTIVE
  */
 bool util::isUsernameDuplicate(const std::string& username, const util::Map<std::string, User*>& usersMap)
 {
     int index = usersMap.findIf(
         [&](const std::string&, User* user)
         {
-            return (user->getUserName() == username && user->getState() == util::State::ACTIVE);
+            return (user->getUserName() == username);
         }
     );
     return index != -1;