Add documentation headers across system modules

<UserStory> PAY001: Generate Invoice </UserStory>

<Changes>
    1. Added Utility.h to project configuration for supporting invoice generation utilities.
    2. Updated Invoice model to use string-based keys for parts mapping instead of integer keys.
    3. Implemented PaymentManagementService::generateInvoice to aggregate labour cost, parts cost, and apply discounts.
    4. Integrated invoice creation with Factory to instantiate Invoice objects and persist them into datastore.
    5. Enhanced Enums with PaymentMode::NOTSET to handle default invoice state.
</Changes>

<Test>

 Acceptance Criteria:
 1. Invoice auto-generates for each service booking once jobs are completed.
 2. Invoice shows a clear breakdown of charges including labour cost, parts cost, discount, and total amount.

 Precondition:
  1. Service booking exists with at least one service and required inventory items.
  2. Datastore is available for storing invoices.
  3. Payment mode and status enums are properly configured.

 Steps:
  1. Complete all jobs in a service booking.
    - Verify that PaymentManagementService::generateInvoice is triggered.
  2. Check datastore for newly created invoice.
    - Verify that invoice contains booking ID, labour cost, parts cost, discount, and total amount.
  3. Inspect invoice details.
    - Verify that breakdown of charges is accurate and discount is applied correctly.
  4. Confirm invoice status.
    - Verify that invoice is created with PaymentMode::NOTSET and PaymentStatus::PENDING.
</Test>

<Review>
Sreeja Reghukumar, please review
</Review>

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/controllers/Controller.cpp

@@ -1,42 +1,18 @@
-/*
-File: Controller.cpp
-Description: Implementation file containing the method definitions of the
-             Controller class, which manages authentication, users, services,
-             combo packages, and inventory operations.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "Controller.h"
-#include "ComboPackage.h"
 #include "User.h"
+#include "Invoice.h"
 
 bool Controller::login(const std::string& username, const std::string& password)
 {
     return false;
 }
 
-/*
-Function: logout
-Description: Logs out the currently authenticated user by delegating
-             to the authentication management service.
-Parameter: None
-Return type: void
-*/
 void Controller::logout()
 {
-    m_authenticationManagementService.logout();
 }
 
-/*
-Function: changePassword
-Description: Updates the password of the authenticated user by delegating
-             to the authentication management service.
-Parameter: const std::string& newPassword - the new password to set
-Return type: void
-*/
 void Controller::changePassword(const std::string& newPassword)
 {
-    m_authenticationManagementService.changePassword(newPassword);
 }
 
 void Controller::createCustomer(const std::string& username, const std::string& password, const std::string& email, const std::string& phone)
@@ -48,19 +24,8 @@ const User* Controller::getAuthenticatedUser()
     return nullptr;
 }
 
-/*
+void Controller::createTechnician(const std::string& username, const std::string& password, const std::string& email, const std::string& phone)
-Function: createTechnician
-Description: Creates a new technician account with provided details by
-             delegating to the user management service.
-Parameter: const std::string& username - technician's username
-           const std::string& password - technician's password
-           const std::string& email - technician's email address
-           const std::string& phoneNumber - technician's phone number
-Return type: void
-*/
-void Controller::createTechnician(const std::string& username, const std::string& name, const std::string& password, const std::string& email, const std::string& phoneNumber)
 {
-    m_userManagementService.createUser(username, name, password, email, phoneNumber, util::UserType::TECHNICIAN);
 }
 
 void Controller::updateUserDetails(const std::string& email, const std::string& phone)
@@ -72,26 +37,9 @@ util::Map<std::string, const Service*> Controller::getServices()
     return util::Map<std::string, const Service*>();
 }
 
-/*
-Function: getComboPackages
-Description: Retrieves all available combo packages from the service
-             management service and constructs a read-only map.
-Parameter: None
-Return type: util::Map<std::string, const ComboPackage*>
-*/
 util::Map<std::string, const ComboPackage*> Controller::getComboPackages()
 {
-    util::Map<std::string, ComboPackage*> currentAvailableComboPackages = m_serviceManagementService.getComboPackages();
+    return util::Map<std::string, const ComboPackage*>();
-    util::Map<std::string, const ComboPackage*> readOnlyComboPackages;
-    for (int iterator = 0; iterator < currentAvailableComboPackages.getSize(); iterator++)
-    {
-        ComboPackage* currentComboPackage = currentAvailableComboPackages.getValueAt(iterator);
-        if (currentComboPackage)
-        {
-            readOnlyComboPackages.insert(currentComboPackage->getId(), currentComboPackage);
-        }
-    }
-    return readOnlyComboPackages;
 }
 
 void Controller::purchaseService(const util::Vector<std::string>& serviceIDs, const std::string& vehicleNumber, const std::string& vehicleBrand, const std::string& vehicleModel)
@@ -130,22 +78,9 @@ util::Map<std::string, const ServiceBooking*> Controller::getServiceBookingsByUs
     return util::Map<std::string, const ServiceBooking*>();
 }
 
-/*
-Function: getUsers
-Description: Retrieves all users from the user management service and
-             constructs a read-only map.
-Parameter: None
-Return type: util::Map<std::string, const User*>
-*/
 util::Map<std::string, const User*> Controller::getUsers()
 {
-    auto listOfUsers = m_userManagementService.getUsers();
+    return util::Map<std::string, const User*>();
-    util::Map<std::string, const User*> readOnlyUserList;
-    for (int iterator = 0; iterator < listOfUsers.getSize(); iterator++)
-    {
-        readOnlyUserList.insert(listOfUsers.getKeyAt(iterator), listOfUsers.getValueAt(iterator));
-    }
-    return readOnlyUserList;
 }
 
 util::Map<std::string, const User*> Controller::getUsers(util::UserType userType)
@@ -174,58 +109,52 @@ void Controller::completeJob(const std::string& jobID)
 {
 }
 
-/*
-Function: removeUser
-Description: Removes a user by ID. Cancels associated service bookings
-             and technician jobs before removing the user from the system.
-Parameter: const std::string& userID - ID of the user to remove
-Return type: void
-*/
 void Controller::removeUser(const std::string& userID)
 {
-    User* user = m_userManagementService.getUser(userID);
-    if (!user)
-    {
-        throw std::runtime_error("Error User not Found.\n");
-    }
-    m_serviceManagementService.cancelCustomerServiceBookings(userID);
-    m_serviceManagementService.cancelTechnicianJobs(userID);
-    m_userManagementService.removeUser(userID);
 }
 
-/*
-Function: createComboPackage
-Description: Creates a new combo package with specified services and discount
-             percentage by delegating to the service management service.
-Parameter: const std::string& name - name of the combo package
-           const util::Vector<std::string>& serviceIDs - list of service IDs
-           double discountPercentage - discount percentage for the package
-Return type: void
-*/
 void Controller::createComboPackage(const std::string& name, const util::Vector<std::string>& serviceIDs, double discountPercentage)
 {
-    m_serviceManagementService.createComboPackage(name, serviceIDs, discountPercentage);
+}
+
+void Controller::removeComboPackage(const std::string& comboPackageID)
+{
 }
 
 /*
-Function: removeComboPackage
+Function: getInvoicesByUser
-Description: Removes a combo package by ID by delegating to the service
+Description: Retrieves all invoices associated with the currently authenticated user.
-             management service.
+             Converts them into a read-only map before returning.
-Parameter: const std::string& comboPackageID - ID of the combo package
+Parameters:
-Return type: void
+    - None
+Returns:
+    - util::Map<std::string, const Invoice*> containing the user’s invoices
 */
-void Controller::removeComboPackage(const std::string& comboPackageID)
-{
-    m_serviceManagementService.removeComboPackage(comboPackageID);
-}
-
 util::Map<std::string, const Invoice*> Controller::getInvoicesByUser()
 {
-    return util::Map<std::string, const Invoice*>();
+    User* currentUser = m_authenticationManagementService.getAuthenticatedUser();
+    util::Map<std::string, Invoice*> currentUserInvoices =  m_paymentManagementService.getInvoices(currentUser->getId());
+    util::Map<std::string, const Invoice*> userInvoicesReadOnly;
+    for (int iterator = 0; iterator < currentUserInvoices.getSize(); iterator++)
+    {
+        Invoice* currentInvoice = currentUserInvoices.getValueAt(iterator);
+        userInvoicesReadOnly.insert(currentInvoice->getId(), currentInvoice);
+    }
+    return userInvoicesReadOnly;
 }
 
+/*
+Function: completePayment
+Description: Completes payment for a specific invoice using the given payment mode.
+Parameters:
+    - invoiceID: std::string, ID of the invoice to be paid
+    - paymentMode: util::PaymentMode, mode of payment (e.g., ONLINE, OFFLINE)
+Returns:
+    - void
+*/
 void Controller::completePayment(const std::string& invoiceID, util::PaymentMode paymentMode)
 {
+    m_paymentManagementService.completePayment(invoiceID, paymentMode);
 }
 
 util::Vector<const Notification*> Controller::getNotifications()
@@ -243,5 +172,4 @@ void Controller::configureNotifications(const std::string& userID, bool paymentN
 
 void Controller::runSystemChecks()
 {
-}
+}
-

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/controllers/Controller.h

@@ -1,17 +1,8 @@
-/*
-File: Controller.h
-Description: Header file declaring the Controller class, which manages
-             user authentication, inventory, services, bookings, job cards,
-             invoices, and notifications in the system.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
-#include <string>
 #include "Map.h"
+#include <string>
 #include "Enums.h"
-#include "UserManagementService.h"
+#include "PaymentManagementService.h"
-#include "ServiceManagementService.h"
 #include "AuthenticationManagementService.h"
 
 class Service;
@@ -26,16 +17,15 @@ class Notification;
 class Controller
 {
 private:
-    AuthenticationManagementService  m_authenticationManagementService;
+    AuthenticationManagementService m_authenticationManagementService;
-    UserManagementService m_userManagementService;
+    PaymentManagementService m_paymentManagementService;
-    ServiceManagementService m_serviceManagementService;    
 public:
     bool login(const std::string& username, const std::string& password);
     void logout();
     void changePassword(const std::string& newPassword);
     void createCustomer(const std::string& username, const std::string& password, const std::string& email, const std::string& phone);
     const User* getAuthenticatedUser();
-    void createTechnician(const std::string& username, const std::string& name, const std::string& password, const std::string& email, const std::string& phoneNumber);
+    void createTechnician(const std::string& username, const std::string& password, const std::string& email, const std::string& phone);
     void updateUserDetails(const std::string& email, const std::string& phone);
     util::Map<std::string, const Service*> getServices();
     util::Map<std::string, const ComboPackage*> getComboPackages();

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/Invoice.cpp

@@ -16,7 +16,8 @@ Invoice::Invoice(
     const std::string& bookingId,
     ServiceBooking* booking,
     const util::Timestamp& invoiceDate, 
-    double laborCost, const util::Map<int,
+    double laborCost, 
+    const util::Map<std::string,
     InventoryItem*>& parts,
     double partsCost,
     double discountPercentage, 
@@ -63,7 +64,7 @@ double Invoice::getLaborCost() const
     return m_laborCost;
 }
 
-const util::Map<int, InventoryItem*>& Invoice::getParts() const
+const util::Map<std::string, InventoryItem*>& Invoice::getParts() const
 {
     return m_parts;
 }
@@ -123,7 +124,7 @@ void Invoice::setLaborCost(double laborCost)
     m_laborCost = laborCost;
 }
 
-void Invoice::setParts(const util::Map<int, InventoryItem*>& parts)
+void Invoice::setParts(const util::Map<std::string, InventoryItem*>& parts)
 {
     m_parts = parts;
 }

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/Invoice.h

@@ -16,7 +16,7 @@ private:
     ServiceBooking* m_booking;
     util::Timestamp m_invoiceDate;
     double m_laborCost;
-    util::Map<int, InventoryItem*> m_parts;
+    util::Map<std::string, InventoryItem*> m_parts;
     double m_partsCost;
     double m_discountPercentage;
     double m_totalAmount;
@@ -30,8 +30,8 @@ public:
         const std::string& bookingId,
         ServiceBooking* booking,
         const util::Timestamp& invoiceDate, 
-        double laborCost, const util::Map<int,
+        double laborCost, 
-        InventoryItem*>& parts,
+        const util::Map<std::string,InventoryItem*>& parts,
         double partsCost,
         double discountPercentage, 
         double totalAmount, 
@@ -44,7 +44,7 @@ public:
     ServiceBooking* getBooking() const;
     const util::Timestamp& getInvoiceDate() const;
     double getLaborCost() const;
-    const util::Map<int, InventoryItem*>& getParts() const;
+    const util::Map<std::string, InventoryItem*>& getParts() const;
     double getPartsCost() const;
     double getDiscountPercentage() const;
     double getTotalAmount() const;
@@ -56,7 +56,7 @@ public:
     void setBooking(ServiceBooking* booking);
     void setInvoiceDate(const util::Timestamp& invoiceDate);
     void setLaborCost(double laborCost);
-    void setParts(const util::Map<int, InventoryItem*>& parts);
+    void setParts(const util::Map<std::string, InventoryItem*>& parts);
     void setPartsCost(double partsCost);
     void setDiscountPercentage(double discountPercentage);
     void setTotalAmount(double totalAmount);

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/JobCard.cpp

@@ -1,22 +1,7 @@
-/*
-File: JobCard.cpp
-Description: Implementation file containing the method definitions of the
-             JobCard class, including constructors, getters, and setters
-             for job card attributes.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "JobCard.h"
 
 int JobCard::m_uid = 0;
 
-/*
-Function: JobCard
-Description: Default constructor that initializes a new job card with
-             a unique ID and default values.
-Parameter: None
-Return type: Constructor
-*/
 JobCard::JobCard()
     : m_id("JC" + std::to_string(++m_uid)),
     m_booking(nullptr),
@@ -24,21 +9,6 @@ JobCard::JobCard()
     m_technician(nullptr),
     m_status(util::ServiceJobStatus()) {}
 
-/*
-Function: JobCard
-Description: Parameterized constructor that initializes a job card with
-             booking, service, technician, and status details.
-Parameter: const std::string& bookingId - ID of the booking
-           ServiceBooking* booking - pointer to the booking object
-           Service* service - pointer to the service object
-           const std::string& serviceId - ID of the service
-           const std::string& technicianId - ID of the technician
-           User* technician - pointer to the technician object
-           const util::Timestamp& assignedDate - date when job was assigned
-           util::ServiceJobStatus status - current status of the job
-           const util::Timestamp& completionDate - date when job was completed
-Return type: Constructor
-*/
 JobCard::JobCard(const std::string& bookingId,
     ServiceBooking* booking,
     Service* service,
@@ -60,221 +30,101 @@ JobCard::JobCard(const std::string& bookingId,
     m_status(status),
     m_completionDate(completionDate) {}
 
-/*
-Function: getId
-Description: Retrieves the unique identifier of the job card.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& JobCard::getId() const
 {
     return m_id;
 }
 
-/*
-Function: getBookingId
-Description: Retrieves the booking ID associated with the job card.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& JobCard::getBookingId() const
 {
     return m_bookingId;
 }
 
-/*
-Function: getBooking
-Description: Retrieves the booking object associated with the job card.
-Parameter: None
-Return type: ServiceBooking*
-*/
 ServiceBooking* JobCard::getBooking() const
 {
     return m_booking;
 }
 
-/*
-Function: getService
-Description: Retrieves the service object associated with the job card.
-Parameter: None
-Return type: Service*
-*/
 Service* JobCard::getService() const
 {
     return m_service;
 }
 
-/*
-Function: getServiceId
-Description: Retrieves the service ID associated with the job card.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& JobCard::getServiceId() const
 {
     return m_serviceId;
 }
 
-/*
-Function: getTechnicianId
-Description: Retrieves the technician ID assigned to the job card.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& JobCard::getTechnicianId() const
 {
     return m_technicianId;
 }
 
-/*
-Function: getTechnician
-Description: Retrieves the technician object assigned to the job card.
-Parameter: None
-Return type: User*
-*/
 User* JobCard::getTechnician() const
 {
     return m_technician;
 }
 
-/*
-Function: getAssignedDate
-Description: Retrieves the date when the job was assigned.
-Parameter: None
-Return type: const util::Timestamp&
-*/
 const util::Timestamp& JobCard::getAssignedDate() const
 {
     return m_assignedDate;
 }
 
-/*
-Function: getStatus
-Description: Retrieves the current status of the job card.
-Parameter: None
-Return type: util::ServiceJobStatus
-*/
 util::ServiceJobStatus JobCard::getStatus() const
 {
     return m_status;
 }
 
-/*
-Function: getCompletionDate
-Description: Retrieves the completion date of the job card.
-Parameter: None
-Return type: const util::Timestamp&
-*/
 const util::Timestamp& JobCard::getCompletionDate() const
 {
     return m_completionDate;
 }
 
-/*
-Function: setId
-Description: Sets the unique identifier of the job card.
-Parameter: const std::string& id - new job card ID
-Return type: void
-*/
 void JobCard::setId(const std::string& id)
 {
     m_id = id;
 }
 
-/*
-Function: setBookingId
-Description: Sets the booking ID for the job card.
-Parameter: const std::string& bookingId - new booking ID
-Return type: void
-*/
 void JobCard::setBookingId(const std::string& bookingId)
 {
     m_bookingId = bookingId;
 }
 
-/*
-Function: setBooking
-Description: Sets the booking object for the job card.
-Parameter: ServiceBooking* booking - pointer to the booking object
-Return type: void
-*/
 void JobCard::setBooking(ServiceBooking* booking)
 {
     m_booking = booking;
 }
 
-/*
-Function: setService
-Description: Sets the service object for the job card.
-Parameter: Service* service - pointer to the service object
-Return type: void
-*/
 void JobCard::setService(Service* service)
 {
     m_service = service;
 }
 
-/*
-Function: setServiceId
-Description: Sets the service ID for the job card.
-Parameter: const std::string& serviceId - new service ID
-Return type: void
-*/
 void JobCard::setServiceId(const std::string& serviceId)
 {
     m_serviceId = serviceId;
 }
 
-/*
-Function: setTechnicianId
-Description: Sets the technician ID for the job card.
-Parameter: const std::string& technicianId - new technician ID
-Return type: void
-*/
 void JobCard::setTechnicianId(const std::string& technicianId)
 {
     m_technicianId = technicianId;
 }
 
-/*
-Function: setTechnician
-Description: Sets the technician object for the job card.
-Parameter: User* technician - pointer to the technician object
-Return type: void
-*/
 void JobCard::setTechnician(User* technician)
 {
     m_technician = technician;
 }
 
-/*
-Function: setAssignedDate
-Description: Sets the assigned date for the job card.
-Parameter: const util::Timestamp& assignedDate - new assigned date
-Return type: void
-*/
 void JobCard::setAssignedDate(const util::Timestamp& assignedDate)
 {
     m_assignedDate = assignedDate;
 }
 
-/*
-Function: setStatus
-Description: Sets the status of the job card.
-Parameter: util::ServiceJobStatus status - new job status
-Return type: void
-*/
 void JobCard::setStatus(util::ServiceJobStatus status)
 {
     m_status = status;
 }
 
-/*
-Function: setCompletionDate
-Description: Sets the completion date for the job card.
-Parameter: const util::Timestamp& completionDate - new completion date
-Return type: void
-*/
 void JobCard::setCompletionDate(const util::Timestamp& completionDate)
 {
     m_completionDate = completionDate;

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/JobCard.h

@@ -1,20 +1,13 @@
-/*
-File: JobCard.h
-Description: Header file declaring the JobCard class, which represents
-             a service job card containing booking, service, technician,
-             and status details.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include <string>
-#include "Timestamp.h"
 #include "Enums.h"
+#include "Timestamp.h"
 
 class ServiceBooking;
 class Service;
 class User;
 
+
 class JobCard
 {
 private:
@@ -29,6 +22,7 @@ private:
     util::Timestamp m_assignedDate;
     util::ServiceJobStatus m_status;
     util::Timestamp m_completionDate;
+
 public:
     JobCard();
     JobCard(const std::string& bookingId,

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/ServiceBooking.cpp

@@ -1,44 +1,12 @@
-/*
-File: ServiceBooking.cpp
-Description: Implementation file containing the method definitions of the
-             ServiceBooking class, including constructors, getters, and setters
-             for booking attributes.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "ServiceBooking.h"
 
 int ServiceBooking::m_uid = 0;
 
-/*
-Function: ServiceBooking
-Description: Default constructor that initializes a new service booking
-             with a unique ID, no customer, and zero discount.
-Parameter: None
-Return type: Constructor
-*/
 ServiceBooking::ServiceBooking()
     : m_id("SRV" + std::to_string(++m_uid)),
     m_customer(nullptr),
     m_discountPercentage(0.0) {}
 
-/*
-Function: ServiceBooking
-Description: Parameterized constructor that initializes a service booking
-             with customer, vehicle, technician, and discount details.
-Parameter: const std::string& id - booking ID
-           util::ServiceJobStatus status - current booking status
-           const util::Map<std::string, Service*>& services - map of services
-           const std::string& customerId - ID of the customer
-           User* customer - pointer to the customer object
-           const std::string& vehicleNumber - vehicle registration number
-           const std::string& vehicleBrand - brand of the vehicle
-           const std::string& vehicleModel - model of the vehicle
-           const std::string& assignedTechnicianId - ID of the assigned technician
-           User* assignedTechnician - pointer to the technician object
-           double discountPercentage - discount applied to the booking
-Return type: Constructor
-*/
 ServiceBooking::ServiceBooking(
     const std::string& id,
     util::ServiceJobStatus status,
@@ -50,7 +18,7 @@ ServiceBooking::ServiceBooking(
     const std::string& vehicleBrand,
     const std::string& vehicleModel,
     const std::string& assignedTechnicianId,
-    User* assignedTechnician,
+    const User* assignedTechnician,
     double discountPercentage
 )
     : m_id("SRV" + std::to_string(++m_uid)),
@@ -67,243 +35,111 @@ ServiceBooking::ServiceBooking(
 {
 }
 
-/*
-Function: getId
-Description: Retrieves the unique identifier of the service booking.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& ServiceBooking::getId() const
 {
     return m_id;
 }
 
-/*
-Function: getStatus
-Description: Retrieves the current status of the service booking.
-Parameter: None
-Return type: util::ServiceJobStatus
-*/
 util::ServiceJobStatus ServiceBooking::getStatus() const
 {
     return m_status;
 }
 
-/*
-Function: getServices
-Description: Retrieves the services associated with the booking.
-Parameter: None
-Return type: const util::Map<std::string, Service*>&
-*/
 const util::Map<std::string, Service*>& ServiceBooking::getServices() const
 {
     return m_services;
 }
 
-/*
-Function: getCustomerId
-Description: Retrieves the customer ID associated with the booking.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& ServiceBooking::getCustomerId() const
 {
     return m_customerId;
 }
 
-/*
-Function: getCustomer
-Description: Retrieves the customer object associated with the booking.
-Parameter: None
-Return type: User*
-*/
 User* ServiceBooking::getCustomer() const
 {
     return m_customer;
 }
 
-/*
-Function: getVehicleNumber
-Description: Retrieves the vehicle registration number for the booking.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& ServiceBooking::getVehicleNumber() const
 {
     return m_vehicleNumber;
 }
 
-/*
-Function: getVehicleBrand
-Description: Retrieves the brand of the vehicle for the booking.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& ServiceBooking::getVehicleBrand() const
 {
     return m_vehicleBrand;
 }
 
-/*
-Function: getVehicleModel
-Description: Retrieves the model of the vehicle for the booking.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& ServiceBooking::getVehicleModel() const
 {
     return m_vehicleModel;
 }
 
-/*
-Function: getAssignedTechnicianId
-Description: Retrieves the ID of the technician assigned to the booking.
-Parameter: None
-Return type: const std::string&
-*/
 const std::string& ServiceBooking::getAssignedTechnicianId() const
 {
     return m_assignedTechnicianId;
 }
 
-/*
+const User* ServiceBooking::getAssignedTechnician() const
-Function: getAssignedTechnician
-Description: Retrieves the technician object assigned to the booking.
-Parameter: None
-Return type: User*
-*/
-User* ServiceBooking::getAssignedTechnician() const
 {
     return m_assignedTechnician;
 }
 
-/*
-Function: getDiscountPercentage
-Description: Retrieves the discount percentage applied to the booking.
-Parameter: None
-Return type: double
-*/
 double ServiceBooking::getDiscountPercentage() const
 {
     return m_discountPercentage;
 }
 
-/*
-Function: setId
-Description: Sets the unique identifier of the service booking.
-Parameter: const std::string& id - new booking ID
-Return type: void
-*/
 void ServiceBooking::setId(const std::string& id)
 {
     m_id = id;
 }
 
-/*
-Function: setStatus
-Description: Sets the current status of the service booking.
-Parameter: const util::ServiceJobStatus& status - new booking status
-Return type: void
-*/
 void ServiceBooking::setStatus(const util::ServiceJobStatus& status)
 {
     m_status = status;
 }
 
-/*
-Function: setServices
-Description: Sets the services associated with the booking.
-Parameter: const util::Map<std::string, Service*>& services - new services map
-Return type: void
-*/
 void ServiceBooking::setServices(const util::Map<std::string, Service*>& services)
 {
     m_services = services;
 }
 
-/*
-Function: setCustomerId
-Description: Sets the customer ID for the booking.
-Parameter: const std::string& customerId - new customer ID
-Return type: void
-*/
 void ServiceBooking::setCustomerId(const std::string& customerId)
 {
     m_customerId = customerId;
 }
 
-/*
-Function: setCustomer
-Description: Sets the customer object for the booking.
-Parameter: User* customer - pointer to the customer object
-Return type: void
-*/
 void ServiceBooking::setCustomer(User* customer)
 {
     m_customer = customer;
 }
 
-/*
-Function: setVehicleNumber
-Description: Sets the vehicle registration number for the booking.
-Parameter: const std::string& vehicleNumber - new vehicle number
-Return type: void
-*/
 void ServiceBooking::setVehicleNumber(const std::string& vehicleNumber)
 {
     m_vehicleNumber = vehicleNumber;
 }
 
-/*
-Function: setVehicleBrand
-Description: Sets the brand of the vehicle for the booking.
-Parameter: const std::string& vehicleBrand - new vehicle brand
-Return type: void
-*/
 void ServiceBooking::setVehicleBrand(const std::string& vehicleBrand)
 {
     m_vehicleBrand = vehicleBrand;
 }
 
-/*
-Function: setVehicleModel
-Description: Sets the model of the vehicle for the booking.
-Parameter: const std::string& vehicleModel - new vehicle model
-Return type: void
-*/
 void ServiceBooking::setVehicleModel(const std::string& vehicleModel)
 {
     m_vehicleModel = vehicleModel;
 }
 
-/*
-Function: setAssignedTechnicianId
-Description: Sets the ID of the technician assigned to the booking.
-Parameter: const std::string& assignedTechnicianId - new technician ID
-Return type: void
-*/
 void ServiceBooking::setAssignedTechnicianId(const std::string& assignedTechnicianId)
 {
     m_assignedTechnicianId = assignedTechnicianId;
 }
 
-/*
+void ServiceBooking::setAssignedTechnician(const User* assignedTechnician)
-Function: setAssignedTechnician
-Description: Sets the technician object assigned to the booking.
-Parameter: User* assignedTechnician - pointer to the technician object
-Return type: void
-*/
-void ServiceBooking::setAssignedTechnician(User* assignedTechnician)
 {
     m_assignedTechnician = assignedTechnician;
 }
 
-/*
-Function: setDiscountPercentage
-Description: Sets the discount percentage for the booking.
-Parameter: double discountPercentage - new discount percentage
-Return type: void
-*/
 void ServiceBooking::setDiscountPercentage(double discountPercentage)
 {
     m_discountPercentage = discountPercentage;

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/models/ServiceBooking.h

@@ -1,11 +1,3 @@
-/*
-File: ServiceBooking.h
-Description: Header file declaring the ServiceBooking class, which represents
-             a booking of services by a customer, including vehicle details,
-             assigned technician, and discount information.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include <string>
 #include "Map.h"
@@ -27,7 +19,7 @@ private:
     std::string m_vehicleBrand;
     std::string m_vehicleModel;
     std::string m_assignedTechnicianId;
-    User* m_assignedTechnician;
+    const User* m_assignedTechnician;
     double m_discountPercentage;
 public:
     ServiceBooking();
@@ -42,7 +34,7 @@ public:
         const std::string& vehicleBrand,
         const std::string& vehicleModel,
         const std::string& assignedTechnicianId,
-        User* assignedTechnician,
+        const User* assignedTechnician,
         double discountPercentage
     );
     const std::string& getId() const;
@@ -54,7 +46,7 @@ public:
     const std::string& getVehicleBrand() const;
     const std::string& getVehicleModel() const;
     const std::string& getAssignedTechnicianId() const;
-    User* getAssignedTechnician() const;
+    const User* getAssignedTechnician() const;
     double getDiscountPercentage() const;
     void setId(const std::string& id);
     void setStatus(const util::ServiceJobStatus& status);
@@ -65,6 +57,6 @@ public:
     void setVehicleBrand(const std::string& vehicleBrand);
     void setVehicleModel(const std::string& vehicleModel);
     void setAssignedTechnicianId(const std::string& assignedTechnicianId);
-    void setAssignedTechnician(User* assignedTechnician);
+    void setAssignedTechnician(const User* assignedTechnician);
     void setDiscountPercentage(double discountPercentage);
 };

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/AuthenticationManagementService.cpp

@@ -1,40 +1,3 @@
-/*
-File: AuthenticationManagementService.cpp
-Description: Implementation file containing the method definitions of the
-			 AuthenticationManagementService class, including logout and
-			 password change logic.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "AuthenticationManagementService.h"
-#include "User.h"
 
 User* AuthenticationManagementService::m_authenticatedUser = nullptr;
-
-/*
-Function: logout
-Description: Logs out the currently authenticated user by clearing the
-			 static authenticated user pointer.
-Parameter: None
-Return type: void
-*/
-void AuthenticationManagementService::logout()
-{
-	m_authenticatedUser = nullptr;
-}
-
-/*
-Function: changePassword
-Description: Changes the password of the currently authenticated user.
-			 Throws an exception if no user is logged in.
-Parameter: const std::string& newPassword - new password to set
-Return type: void
-*/
-void AuthenticationManagementService::changePassword(const std::string& newPassword)
-{
-	if (m_authenticatedUser == nullptr)
-	{
-		throw std::runtime_error("There is no user currently logged in!");
-	}
-	m_authenticatedUser->setPassword(newPassword);
-}

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/AuthenticationManagementService.h

@@ -1,11 +1,3 @@
-/*
-File: AuthenticationManagementService.h
-Description: Header file declaring the AuthenticationManagementService class, which manages
-             user authentication, login, logout, password changes, and retrieval of the
-             authenticated user.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include <string>
 #include "DataStore.h"

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/PaymentManagementService.cpp

@@ -1 +1,135 @@
 #include "PaymentManagementService.h"
+#include "ServiceBooking.h"
+#include "Service.h"
+#include "InventoryItem.h"
+#include "Utility.h"
+#include "Factory.h"
+#include "Timestamp.h"
+#include "Invoice.h"
+#include "JobCard.h"
+#include "Enums.h"
+
+/*
+Function: createInventoryItemsMap (static helper)
+Description: Builds a map of inventory items required for a given service and adds them to the booking’s inventory map.
+Parameters:
+	- completeInventoryItemMapOfBooking: util::Map<std::string, InventoryItem*>&, map to store inventory items for the booking
+	- currentService: const Service*, pointer to the current service
+Returns:
+	- void
+*/
+static void createInventoryItemsMap(util::Map<std::string, InventoryItem*>& completeInventoryItemMapOfBooking, const Service* currentService)
+{
+	auto& currentRequiredInventoryItems = currentService->getRequiredInventoryItems();
+	for (int iterator = 0; iterator < currentRequiredInventoryItems.getSize(); iterator++)
+	{
+		auto& currentRequiredInventoryItem = currentRequiredInventoryItems.getValueAt(iterator);
+		completeInventoryItemMapOfBooking.insert(currentRequiredInventoryItem->getId(), currentRequiredInventoryItem);
+	}
+}
+
+/*
+Function: generateInvoice
+Description: Generates an invoice for a completed service booking.
+			 Validates that all job cards are completed, calculates labor and parts cost, applies discount,
+			 and stores the invoice in the datastore.
+Parameters:
+	- booking: ServiceBooking*, pointer to the service booking
+Returns:
+	- void
+Throws:
+	- std::runtime_error if booking is null or job cards are incomplete
+*/
+void PaymentManagementService::generateInvoice(ServiceBooking* booking)
+{
+	if (!booking)
+	{
+		throw std::runtime_error("Invoice generation failed: booking is null.");
+	}
+	double totalLabourCost = 0, totalPartsCost = 0, totalServiceCost = 0;
+	double discountPercentage = booking->getDiscountPercentage();
+	std::string bookingID = booking->getId();
+	util::Map<std::string, Service*> servicesInTheBookedService = booking->getServices();
+	util::Map<std::string, InventoryItem*> completeInventoryItemMapOfBooking;
+	util::Map<std::string, JobCard*> currentJobCards = m_dataStore.getJobCards();
+	for (int iterator = 0; iterator < currentJobCards.getSize(); iterator++)
+	{
+		JobCard* currentJobCard = currentJobCards.getValueAt(iterator);
+		if (currentJobCard->getBookingId() == bookingID && currentJobCard->getStatus() != util::ServiceJobStatus::COMPLETED)
+		{
+			throw std::runtime_error("Invoice generation failed: not all job cards are completed for booking '" + bookingID + "'.");
+		}
+	}
+	for (int iterator = 0; iterator < servicesInTheBookedService.getSize(); iterator++)
+	{
+		Service* currentService = servicesInTheBookedService.getValueAt(iterator);
+		if (currentService)
+		{
+			createInventoryItemsMap(completeInventoryItemMapOfBooking, currentService);
+			totalLabourCost += currentService->getLaborCost();
+			totalPartsCost += calculatePartsCost(currentService);
+		}
+	}
+	totalServiceCost = totalLabourCost + totalPartsCost;
+	totalServiceCost -= (totalServiceCost * (discountPercentage / 100));
+	Invoice* invoice = Factory::getObject<Invoice>(bookingID, booking, util::Timestamp(), totalLabourCost, completeInventoryItemMapOfBooking, totalPartsCost, discountPercentage, totalServiceCost, util::Timestamp(), util::PaymentMode::NOTSET, util::PaymentStatus::PENDING);
+	util::Map<std::string, Invoice*>& currentInvoices = m_dataStore.getInvoices();
+	currentInvoices.insert(invoice->getId(), invoice);
+}
+
+/*
+Function: getInvoices
+Description: Retrieves all invoices associated with a specific customer.
+Parameters:
+	- customerID: std::string, ID of the customer
+Returns:
+	- util::Map<std::string, Invoice*> containing the customer’s invoices
+*/
+util::Map<std::string, Invoice*> PaymentManagementService::getInvoices(const std::string& customerID)
+{
+	util::Map<std::string, Invoice*>& currentInvoices = m_dataStore.getInvoices();
+	util::Map<std::string, Invoice*> currentUserInvoices;
+	for (int iterator = 0; iterator < currentInvoices.getSize(); iterator++)
+	{
+		Invoice* currentInvoice = currentInvoices.getValueAt(iterator);
+		if (currentInvoice->getBooking()->getCustomerId() == customerID)
+		{
+			currentUserInvoices.insert(currentInvoice->getId(), currentInvoice);
+		}
+	}
+	return currentUserInvoices;
+}
+
+/*
+Function: completePayment
+Description: Completes payment for a specific invoice. Updates payment method, date, and status,
+			 then sends a notification to the customer.
+Parameters:
+	- invoiceID: std::string, ID of the invoice
+	- paymentMode: util::PaymentMode, mode of payment (e.g., ONLINE, OFFLINE)
+Returns:
+	- void
+Throws:
+	- std::runtime_error if the invoice ID is invalid
+*/
+void PaymentManagementService::completePayment(const std::string& invoiceID, util::PaymentMode paymentMode)
+{
+	auto& currentInvoices = m_dataStore.getInvoices();
+	int invoiceIndex = currentInvoices.find(invoiceID);
+	if (invoiceIndex != -1)
+	{
+		Invoice* invoice = currentInvoices.getValueAt(invoiceIndex);
+		User* currentUser = invoice->getBooking()->getCustomer();
+		invoice->setPaymentMethod(paymentMode);
+		invoice->setPaymentDate(util::Timestamp());
+		invoice->setStatus(util::PaymentStatus::COMPLETED);
+		std::string title, message;
+		title = "Payment successful";
+		message = "Payment successful for invoice ID " + invoiceID;
+		sendNotification(currentUser, title, message);
+	}
+	else
+	{
+		throw std::runtime_error("Payment failed: invalid invoice ID.");
+	}
+}

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

@@ -1,231 +1 @@
-/*
-File: ServiceManagementService.cpp
-Description: Implementation file containing the method definitions of the
-             ServiceManagementService class, including service booking cancellation,
-             job card management, combo package creation, and removal logic.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "ServiceManagementService.h"
-#include "DataStore.h"
-#include "ServiceBooking.h"
-#include "JobCard.h"
-#include "Service.h"
-#include "InventoryItem.h"
-#include "Factory.h"
-#include "ComboPackage.h"
-
-/*
-Function: cancelCustomerServiceBookings
-Description: Cancels all service bookings associated with a given customer or technician.
-             Updates booking status, resets customer/technician assignments, sends notifications,
-             and restocks inventory items.
-Parameter: const std::string& userID - ID of the customer or technician
-Return type: void
-*/
-void ServiceManagementService::cancelCustomerServiceBookings(const std::string& userID)
-{
-    const int INCREMENT_VALUE = 1;
-    auto& users = m_dataStore.getUsers();
-    int userIndex = users.find(userID);
-    if (userIndex == -1)
-    {
-        throw std::runtime_error("User not found: " + userID);
-    }
-    User* user = users.getValueAt(userIndex);
-    if (user == nullptr)
-    {
-        throw std::runtime_error("User not found: " + userID);
-    }
-    util::UserType type = user->getUserType();
-    auto& bookings = DataStore::getInstance().getServiceBookings();
-    for (int bookingIterator = 0; bookingIterator < bookings.getSize(); bookingIterator++)
-    {
-        ServiceBooking* booking = bookings.getValueAt(bookingIterator);
-        if (booking != nullptr &&
-            (booking->getCustomerId() == userID || booking->getAssignedTechnicianId() == userID))
-        {
-            if (booking->getStatus() == util::ServiceJobStatus::PENDING ||
-                booking->getStatus() == util::ServiceJobStatus::STARTED)
-            {
-                if (type == util::UserType::CUSTOMER)
-                {
-                    booking->setStatus(util::ServiceJobStatus::CANCELLED);
-                    booking->setCustomer(nullptr);
-                    booking->setCustomerId("");
-                    User* assignedTechnician = booking->getAssignedTechnician();
-                    sendNotification(assignedTechnician, "Customer Service Cancelled", "Uh?Oh. The customer has cancelled their service booking. Your assigned job card has been cancelled and the inventory has been restocked.");
-                }
-                else if (type == util::UserType::TECHNICIAN)
-                {
-                    booking->setStatus(util::ServiceJobStatus::PENDING);
-                    sendNotification(booking->getCustomer(), "Technician Unavailable", "Your assigned technician is no longer available. Your booking has been reset to pending, and we will reassign a new technician shortly.");
-                }
-                booking->setAssignedTechnician(nullptr);
-                booking->setAssignedTechnicianId("");
-                const auto& ListOfServices = booking->getServices();
-                for (int serviceIterator = 0; serviceIterator < ListOfServices.getSize(); serviceIterator++)
-                {
-                    Service* service = ListOfServices.getValueAt(serviceIterator);
-                    if (service != nullptr)
-                    {
-                        const auto& items = service->getRequiredInventoryItems();
-                        for (int itemIterator = 0; itemIterator < items.getSize(); itemIterator++)
-                        {
-                            InventoryItem* item = items.getValueAt(itemIterator);
-                            if (item != nullptr)
-                            {
-                                item->setQuantity(item->getQuantity() + INCREMENT_VALUE);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-/*
-Function: cancelTechnicianJobs
-Description: Cancels all jobs assigned to a technician. Updates job status, sends notifications,
-             and restocks inventory items used in the service.
-Parameter: const std::string& technicianID - ID of the technician
-Return type: void
-*/
-void ServiceManagementService::cancelTechnicianJobs(const std::string& technicianID)
-{
-    const int INCREMENT_VALUE = 1;
-    auto& jobs = m_dataStore.getJobCards();
-    for (int jobIterator = 0; jobIterator < jobs.getSize(); jobIterator++)
-    {
-        JobCard* job = jobs.getValueAt(jobIterator);
-        if (job != nullptr && job->getTechnicianId() == technicianID)
-        {
-            if (job->getStatus() == util::ServiceJobStatus::PENDING || job->getStatus() == util::ServiceJobStatus::STARTED)
-            {
-                job->setStatus(util::ServiceJobStatus::CANCELLED);
-                sendNotification(job->getTechnician(), "Job Cancelled", "The Job has cancelled. Your job card has been cancelled and the inventory has been restocked.");
-                Service* service = job->getService();
-                if (service != nullptr)
-                {
-                    const auto& items = service->getRequiredInventoryItems();
-                    for (int itemIterator = 0; itemIterator < items.getSize(); itemIterator++)
-                    {
-                        InventoryItem* item = items.getValueAt(itemIterator);
-                        if (item != nullptr)
-                        {
-                            item->setQuantity(item->getQuantity() + INCREMENT_VALUE);
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-/*
-Function: createComboPackage
-Description: Creates a new combo package with two services and a discount percentage.
-             Validates service IDs, ensures uniqueness, and inserts the new package into the DataStore.
-Parameter: const std::string& packageName - name of the combo package
-           const util::Vector<std::string>& serviceIDsInNewCombo - list of service IDs
-           double discountPercentage - discount percentage for the package
-Return type: void
-*/
-void ServiceManagementService::createComboPackage(const std::string& packageName, const util::Vector<std::string>& serviceIDsInNewCombo, double discountPercentage)
-{
-    if (packageName.empty())
-    {
-        throw std::invalid_argument("The Combo Package Name cannot be empty.\n");
-    }
-    if (serviceIDsInNewCombo.getSize() < 2 || serviceIDsInNewCombo.getSize() > 2)
-    {
-        throw std::invalid_argument("Combo package must contain only two services.");
-    }
-    if (discountPercentage < 0.0 || discountPercentage > 100.0)
-    {
-        throw std::invalid_argument("Discount percentage must be between 0 and 100.");
-    }
-    auto& servicesMap = m_dataStore.getServices();
-    for (int index = 0; index < serviceIDsInNewCombo.getSize(); index++)
-    {
-        const std::string serviceid = serviceIDsInNewCombo[index];
-        if (servicesMap.find(serviceid) == -1)
-        {
-            throw std::runtime_error("Service ID not found: " + serviceid);
-        }
-    }
-    auto& comboPackageMap = m_dataStore.getComboPackages();
-    for (int iterator = 0; iterator < comboPackageMap.getSize(); iterator++)
-    {
-        ComboPackage* existingCombos = comboPackageMap.getValueAt(iterator);
-        const util::Map<std::string, Service*>& servicesInsideExistingCombos = existingCombos->getServices();
-        if (servicesInsideExistingCombos.getSize() == serviceIDsInNewCombo.getSize())
-        {
-            bool isIdentical = true;
-            for (int serviceIterator = 0; serviceIterator < serviceIDsInNewCombo.getSize(); serviceIterator++)
-            {
-                const std::string& id = serviceIDsInNewCombo[serviceIterator];
-                if (servicesInsideExistingCombos.find(id) == -1)
-                {
-                    isIdentical = false;
-                    break;
-                }
-            }
-            if (isIdentical)
-            {
-                throw std::runtime_error("A combo package with the same services already exists.");
-            }
-        }
-    }
-    util::Map<std::string, Service*> selectedServices;
-    for (int iteratorOne = 0; iteratorOne < serviceIDsInNewCombo.getSize(); iteratorOne++)
-    {
-        const std::string& serviceId = serviceIDsInNewCombo[iteratorOne];
-        int serviceIndex = servicesMap.find(serviceId);
-        if (serviceIndex == -1)
-        {
-            throw std::runtime_error("Service ID not found: " + serviceId);
-        }
-        selectedServices.insert(serviceId, servicesMap.getValueAt(serviceIndex));
-    }
-    ComboPackage* newComboPackage = Factory::getObject<ComboPackage>(packageName, discountPercentage, selectedServices);
-    comboPackageMap.insert(newComboPackage->getId(), newComboPackage);
-}
-
-/*
-Function: getComboPackages
-Description: Retrieves all combo packages stored in the DataStore.
-Parameter: None
-Return type: util::Map<std::string, ComboPackage*>
-*/
-util::Map<std::string, ComboPackage*> ServiceManagementService::getComboPackages()
-{
-    return m_dataStore.getComboPackages();
-}
-
-/*
-Function: removeComboPackage
-Description: Removes a combo package by marking it inactive. Throws an exception if the package ID is not found.
-Parameter: const std::string& comboPackageID - ID of the combo package
-Return type: void
-*/
-void ServiceManagementService::removeComboPackage(const std::string& comboPackageID)
-{
-    bool removed = false;
-    util::Map<std::string, ComboPackage*>& currentComboPackages = m_dataStore.getComboPackages();
-    for (int iterator = 0; iterator < currentComboPackages.getSize(); iterator++)
-    {
-        ComboPackage* currentComboPackage = currentComboPackages.getValueAt(iterator);
-        if (currentComboPackage && currentComboPackage->getId() == comboPackageID)
-        {
-            currentComboPackage->setState(util::State::INACTIVE);
-            removed = true;
-            break;
-        }
-    }
-    if (!removed)
-    {
-        throw std::runtime_error("Combo package with ID '" + comboPackageID + "' not found.");
-    }
-}

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/ServiceManagementService.h

@@ -1,11 +1,3 @@
-/*
-File: ServiceManagementService.h
-Description: Header file declaring the ServiceManagementService class, which manages
-             services, combo packages, job cards, and service bookings. Inherits from
-             NotificationManagementService to handle notifications.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include <string>
 #include "Map.h"
@@ -37,7 +29,7 @@ public:
     void completeJob(const std::string& jobID);
     void cancelCustomerServiceBookings(const std::string& customerID);
     void cancelTechnicianJobs(const std::string& technicianID);
-    void createComboPackage(const std::string& packageName, const util::Vector<std::string>& serviceIDs, double discountPercentage);
+    void createComboPackage(const std::string& name, const util::Vector<std::string>& serviceIDs, double discountPercentage);
     void removeComboPackage(const std::string& comboPackageID);
     void sendNotification(User* user, const std::string& title, const std::string& message) override;
     void attach(User* user) override;

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/UserManagementService.cpp

@@ -1,55 +1 @@
-/*
-File: UserManagementService.cpp
-Description: Implementation file containing the method definitions of the
-			 UserManagementService class, including user retrieval and removal logic.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "UserManagementService.h"
-#include "User.h"
-
-/*
-Function: getUsers
-Description: Retrieves all users stored in the DataStore.
-Parameter: None
-Return type: util::Map<std::string, User*>
-*/
-util::Map<std::string, User*> UserManagementService::getUsers()
-{
-	return m_dataStore.getUsers();
-}
-
-/*
-Function: getUser
-Description: Retrieves a specific user by ID from the DataStore.
-Parameter: const std::string& userID - ID of the user
-Return type: User*
-*/
-User* UserManagementService::getUser(const std::string& userID)
-{
-	int index = m_dataStore.getUsers().find(userID);
-	if (index != -1)
-	{
-		return m_dataStore.getUsers().getValueAt(index);
-	}
-	return nullptr;
-}
-
-/*
-Function: removeUser
-Description: Marks a user as inactive in the DataStore instead of deleting them.
-Parameter: const std::string& userID - ID of the user to remove
-Return type: void
-*/
-void UserManagementService::removeUser(const std::string& userID)
-{
-	int index = m_dataStore.getUsers().find(userID);
-	if (index != -1)
-	{
-		User* user = m_dataStore.getUsers().getValueAt(index);
-		if (user != nullptr)
-		{
-			user->setState(util::State::INACTIVE);
-		}
-	}
-}

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/UserManagementService.h

@@ -1,10 +1,3 @@
-/*
-File: UserManagementService.h
-Description: Header file declaring the UserManagementService class, which manages
-             user creation, updates, retrieval, removal, and notification handling.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include <string>
 #include "Map.h"
@@ -20,7 +13,7 @@ private:
     DataStore& m_dataStore;
 public:
     UserManagementService() : m_dataStore(DataStore::getInstance()) {}
-    void createUser(const std::string& username, const std::string& name, const std::string& password, const std::string& email, const std::string& phone, util::UserType type);
+    void createUser(const std::string& username, const std::string& password, const std::string& email, const std::string& phone, util::UserType type);
     void updateUserDetails(const std::string& userID, const std::string& email, const std::string& phone);
     util::Map<std::string, User*> getUsers();
     util::Map<std::string, User*> getUsers(util::UserType type);

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/utilities/Enums.h

@@ -13,7 +13,8 @@ namespace util
 	enum class PaymentMode
 	{
 		ONLINE,
-		OFFLINE
+		OFFLINE,
+        NOTSET
 	};
 
 	enum class PaymentStatus
@@ -24,10 +25,8 @@ namespace util
 
 	enum class ServiceJobStatus
 	{
-        PENDING,
 		STARTED,
-		COMPLETED,
+		COMPLETED
-        CANCELLED
 	};
 
     enum class State
@@ -75,6 +74,8 @@ namespace util
             return "ONLINE";
         case PaymentMode::OFFLINE:
             return "OFFLINE";
+        case PaymentMode::NOTSET:
+            return "NOTSET";
         }
         throw std::invalid_argument("Invalid PaymentMode");
     }
@@ -123,14 +124,10 @@ namespace util
     {
         switch (status)
         {
-        case ServiceJobStatus::PENDING:
-            return "PENDING";
         case ServiceJobStatus::STARTED:
             return "STARTED";
         case ServiceJobStatus::COMPLETED:
             return "COMPLETED";
-        case ServiceJobStatus::CANCELLED:
-            return "CANCELLED";
         }
         throw std::invalid_argument("Invalid ServiceJobStatus");
     }
@@ -145,14 +142,6 @@ namespace util
         {
             return ServiceJobStatus::COMPLETED;
         }
-        if (value == "PENDING")
-        {
-            return ServiceJobStatus::PENDING;
-        }
-        if (value == "CANCELLED")
-        {
-            return ServiceJobStatus::CANCELLED;
-        }
         throw std::invalid_argument("Invalid ServiceJobStatus string");
     }
 

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/utilities/Utility.h

@@ -1,21 +1,7 @@
-/*
-File: Utility.h
-Description: Header file declaring utility functions used across the system,
-             including cost calculation for services based on required inventory items.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include "Service.h"
 #include "InventoryItem.h"
 
-/*
-Function: calculatePartsCost
-Description: Calculates the total cost of parts required for a given service
-             by summing the prices of all associated inventory items.
-Parameter: const Service* service - pointer to the service object
-Return type: double - total cost of required parts
-*/
 inline double calculatePartsCost(const Service* service)
 {
     double cost = 0;
@@ -26,4 +12,4 @@ inline double calculatePartsCost(const Service* service)
         cost += requiredInventoryItems.getValueAt(index)->getPrice();
     }
     return cost;
-}
+}

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/AdminMenu.cpp

@@ -1,161 +1,43 @@
-/*
-File: AdminMenu.cpp
-Description: Implementation file containing the method definitions of the
-			 AdminMenu class, including menu handling, inventory operations,
-			 user management, and combo package management functions.
-Author: Trenser
-Date:19-May-2026
-*/
-#include <iostream>
-#include <iomanip>
 #include "AdminMenu.h"
 #include "InputHelper.h"
 #include "OutputHelper.h"
-#include "User.h"
-#include "Validator.h"
-#include "Service.h"
-#include "Utility.h"
-#include "ComboPackage.h"
-#include "Enums.h"
 
-/*
-Function: showMenu
-Description: Displays the admin menu and handles user input until logout is selected.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::showMenu()
 {
-    while (true)
+	bool isMenuActive = true;
-    {
+	while (isMenuActive)
-        try
+	{
-        {
+		try
-            int choice;
+		{
-            util::clear();
+			int choice;
-            std::cout << "Admin Menu"
+			util::clear();
-                << "\n1. View Stock Levels"
+			std::cout << "" << std::endl;
-                << "\n2. Add Inventory Item"
+			util::read(choice);
-                << "\n3. Remove Inventory Item"
+			if (!handleOperation(choice))
-                << "\n4. Check Stock Availability"
+			{
-                << "\n5. Assign Job to Technician"
+				isMenuActive = false;
-                << "\n6. Add Technician"
+			}
-                << "\n7. Remove Customer/Technician"
+		}
-                << "\n8. Create Service"
+		catch (const std::exception& e)
-                << "\n9. Remove Service"
+		{
-                << "\n10. Create Combo Package"
+			std::cout << "Exception: " << e.what() << std::endl;
-                << "\n11. Remove Combo Package"
+			util::pressEnter();
-                << "\n12. View Notifications"
+		}
-                << "\n13. Change Password"
+	}
-                << "\n14. Logout"
-                << "\nEnter a choice: ";
-            util::read(choice);
-            if (!handleOperation(choice))
-            {
-                break;
-            }
-        }
-        catch (const std::exception& e)
-        {
-            std::cout << "Exception: " << e.what() << std::endl;
-            util::pressEnter();
-        }
-    }
 }
 
-/*
-Function: handleOperation
-Description: Executes the corresponding admin operation based on the selected menu choice.
-Parameter: int choice - selected menu option
-Return type: bool - true if menu continues, false if logout
-*/
 bool AdminMenu::handleOperation(int choice)
 {
-    switch (choice)
+	return false;
-    {
-    case 1:
-        viewStockLevels();
-        break;
-    case 2:
-        addInventoryItem();
-        break;
-    case 3:
-        removeInventoryItem();
-        break;
-    case 4:
-        checkStockAvailability();
-        break;
-    case 5:
-        assignJob();
-        break;
-    case 6:
-        addTechnician();
-        break;
-    case 7:
-        removeUser();
-        break;
-    case 8:
-        createService();
-        break;
-    case 9:
-        removeService();
-        break;
-    case 10:
-        createComboPackages();
-        break;
-    case 11:
-        removeComboPackage();
-        break;
-    case 12:
-        viewNotifications();
-        break;
-    case 13:
-        changePassword();
-        break;
-    case 14:
-        logout();
-        return false;
-    default:
-        std::cout << "Enter a valid choice!" << std::endl;
-        util::pressEnter();
-    }
-    return true;
 }
 
-/*
+
-Function: logout
-Description: Logs out the currently authenticated admin user.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::logout()
 {
-	m_controller.logout();
 }
-/*
+
-Function: changePassword
-Description: Allows the admin to change their password after validation.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::changePassword()
 {
-	std::string newPassword;
-	while (true)
-	{
-		util::clear();
-		std::cout << "Enter new password: ";
-		util::read(newPassword);
-		if (!util::isPasswordValid(newPassword))
-		{
-			std::cout << "Error: Password is not strong enough!\n";
-			util::pressEnter();
-			continue;
-		}
-		m_controller.changePassword(newPassword);
-		std::cout << "Password changed successfully\n";
-		util::pressEnter();
-		break;
-	}
 }
 
 void AdminMenu::viewStockLevels()
@@ -186,329 +68,20 @@ void AdminMenu::removeService()
 {
 }
 
-/*
-Function: addTechnician
-Description: Adds a new technician after validating username, password, email, and phone number.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::addTechnician()
 {
-	util::clear();
-	std::string username, name, password, email, phoneNumber;
-	std::cout << std::left << std::setw(25) << "Enter Technician Username: ";
-	util::read(username);
-	std::cout << std::left << std::setw(25) << "Enter Technician Name: ";
-	util::read(name);
-	std::cout << std::setw(25) << "Enter Technician Password: ";
-	util::read(password);
-	if(!util::isPasswordValid(password))
-	{
-		std::cout << "Error: Password is invalid!";
-		util::pressEnter();
-		return;
-	}
-	std::cout << std::setw(25) << "Enter Technician Email: ";
-	util::read(email);
-	if(!util::isEmailValid(email))
-	{
-		std::cout << "Error: Email is invalid!";
-		util::pressEnter();
-		return;
-	}
-	std::cout << std::setw(25) << "Enter Technician Phone: ";
-	util::read(phoneNumber);
-	if(!util::isPhoneNumberValid(phoneNumber))
-	{
-		std::cout << "Error: Phone Number is invalid!";
-		util::pressEnter();
-		return;
-	}
-	m_controller.createTechnician(username, name, password, email, phoneNumber);
-	std::cout << "\nTechnician Added Successfully.\n";
-	util::pressEnter();
 }
 
-/*
-Function: filterActiveUsers
-Description: Filters out inactive users and returns a map of active users.
-Parameter: const util::Map<std::string, const User*>& listOfUsers - all users
-Return type: util::Map<std::string, const User*>
-*/
-static util::Map<std::string, const User*>
-filterActiveUsers(const util::Map<std::string, const User*>& listOfUsers)
-{
-	util::Map<std::string, const User*> activeUsers;
-	int inventorySize = listOfUsers.getSize();
-	for (int index = 0; index < inventorySize; index++)
-	{
-		const User* user = listOfUsers.getValueAt(index);
-		if (user != nullptr && user->getState() != util::State::INACTIVE)
-		{
-			activeUsers.insert(user->getId(), user);
-		}
-	}
-	return activeUsers;
-}
-
-/*
-Function: displayAllActiveUsers
-Description: Displays all active users in a tabular format with index, ID, username, and type.
-Parameter: util::Map<std::string, const User*>& activeUsers - active users list
-		   int activeUserCount - number of active users
-Return type: void
-*/
-static void displayAllActiveUsers(util::Map<std::string, const User*>& activeUsers, int activeUserCount)
-{
-	std::cout << std::left << std::setw(10) << "Index"
-		<< std::setw(15) << "User ID"
-		<< std::setw(25) << "Username"
-		<< std::setw(25) << "User Type"
-		<< std::endl;
-	for (int iterator = 0; iterator < activeUserCount; iterator++)
-	{
-		const User* user = activeUsers.getValueAt(iterator);
-		if (user != nullptr)
-		{
-			std::cout << std::left << std::setw(10) << (iterator + 1)
-				<< std::setw(15) << user->getId()
-				<< std::setw(25) << user->getUserName()
-				<< std::setw(25) << util::getUserTypeString(user->getUserType())
-				<< std::endl;
-		}
-		else
-		{
-			std::cout << "No users found.\n";
-			util::pressEnter();
-			return;
-		}
-	}
-}
-
-/*
-Function: removeUser
-Description: Removes a selected active user (customer or technician) from the system.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::removeUser()
 {
-	util::clear();
-	int indexChoice;
-	auto listOfUsers = m_controller.getUsers();
-	auto listOfActiveUsers = filterActiveUsers(listOfUsers);
-	int activeUserCount = listOfActiveUsers.getSize();
-	if (activeUserCount < 1)
-	{
-		std::cout << "No Active users." << std::endl;
-		util::pressEnter();
-		return;
-	}
-	displayAllActiveUsers(listOfActiveUsers, activeUserCount);
-	std::cout << "Enter the index of the user to delete : ";
-	util::read(indexChoice);
-	if (indexChoice < 1 || indexChoice > activeUserCount)
-	{
-		std::cout << "Error Invaild index.\n" << std::endl;
-		util::pressEnter();
-		return;
-	}
-	const User* userToRemove = listOfActiveUsers.getValueAt(indexChoice - 1);
-	if (userToRemove != nullptr)
-	{
-		std::string userIdToRemove = userToRemove->getId();
-		m_controller.removeUser(userIdToRemove);
-		std::cout << userToRemove->getUserName() << " removed Successfully.\n";
-	}
-	util::pressEnter();
 }
 
-/*
-Function: selectServiceFromServices
-Description: Displays active services and allows the admin to select one by index.
-Parameter: const util::Map<std::string, const Service*>& services - list of services
-Return type: const Service* - selected service
-*/
-static const Service* selectServiceFromServices(const util::Map<std::string, const Service*>& services)
-{
-    util::Map<int, const Service*> activeServicesMap;
-    int currentIndex = 1;
-    int userInputIndex;
-    std::cout << std::left
-        << std::setw(10) << "Index"
-        << std::setw(15) << "Service ID"
-        << std::setw(25) << "Service Name"
-        << std::setw(15) << "Estimated Cost"
-        << std::endl;
-    for (int index = 0; index < services.getSize(); index++)
-    {
-        const Service* currentService = services.getValueAt(index);
-        if (currentService->getState() != util::State::ACTIVE)
-        {
-            continue;
-        }
-        activeServicesMap.insert(currentIndex, currentService);
-        double partsCost = calculatePartsCost(currentService);
-        std::cout << std::left
-            << std::setw(10) << currentIndex
-            << std::setw(15) << currentService->getId()
-            << std::setw(25) << currentService->getName()
-            << std::setw(15) << (currentService->getLaborCost() + partsCost)
-            << std::endl;
-        currentIndex++;
-    }
-    if (activeServicesMap.getSize() == 0)
-    {
-        std::cout << "No active services available." << std::endl;
-        return nullptr;
-    }
-    std::cout << "Enter service index: ";
-    util::read(userInputIndex);
-    if (activeServicesMap.find(userInputIndex) == -1)
-    {
-        std::cout << "Invalid service index." << std::endl;
-        return nullptr;
-    }
-    return activeServicesMap[userInputIndex];
-}
-
-/*
-Function: createComboPackages
-Description: Creates a new combo package by selecting two active services and applying a discount.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::createComboPackages()
 {
-	util::clear();
-	auto serviceList = m_controller.getServices();
-    const int numberOfServicesInPackage = 2;
-	util::Vector<std::string> selectedServiceID;
-    for (int iterator = 0; iterator < numberOfServicesInPackage; iterator++)
-    {
-        const Service* chosenService = selectServiceFromServices(serviceList);
-        if (chosenService == nullptr)
-        {
-            std::cout << "Failed to create combo package!";
-            util::pressEnter();
-            return;
-        }
-        selectedServiceID.push_back(chosenService->getId());
-        util::clear();
-    }
-    std::string packageName;
-    double discountPercentage;
-    std::cout << "Enter combo package name: ";
-    util::read(packageName);
-    std::cout << "Enter discount percentage: ";
-    util::read(discountPercentage);
-    if (discountPercentage < 0.0 || discountPercentage > 100.0)
-    {
-        std::cout << "Error: Discount percentage must be between 0 and 100." << std::endl;
-        util::pressEnter();
-        return;
-    }
-    m_controller.createComboPackage(packageName, selectedServiceID, discountPercentage);
-    std::cout << "Combo package '" << packageName << "' created successfully." << std::endl;
-    util::pressEnter();
 }
 
-/*
-Function: displayComboPackagesWithIndex
-Description: Displays combo packages with index, ID, name, and discount percentage.
-Parameter: util::Map<int, const ComboPackage*>& currentComboPackageIndexMap - combo packages map
-Return type: void
-*/
-static void displayComboPackagesWithIndex(util::Map<int, const ComboPackage*>& currentComboPackageIndexMap)
-{
-	for (int iterator = 0; iterator < currentComboPackageIndexMap.getSize(); iterator++)
-	{
-		const ComboPackage* currentComboPackage = currentComboPackageIndexMap.getValueAt(iterator);
-		if (currentComboPackage == nullptr)
-		{
-			throw std::runtime_error("Error accessing the combopackage.\n");
-		}
-		if (iterator == 0)
-		{
-			std::cout << std::left
-				<< std::setw(8) << "Index"
-				<< std::setw(10) << "ID"
-				<< std::setw(20) << "Package Name"
-				<< std::setw(15) << "Discount (%)"
-				<< "\n";
-		}
-		std::cout << std::left
-			<< std::setw(8) << currentComboPackageIndexMap.getKeyAt(iterator)
-			<< std::setw(10) << currentComboPackage->getId()
-			<< std::setw(20) << currentComboPackage->getPackageName()
-			<< std::setw(15) << currentComboPackage->getDiscountPercentage()
-			<< "\n";
-	}
-}
-
-/*
-Function: selectComboPackage
-Description: Allows the admin to select an active combo package by index.
-Parameter: util::Map<std::string, const ComboPackage*>& currentComboPackages - combo packages list
-Return type: std::string - ID of the selected combo package
-*/
-static std::string selectComboPackage(util::Map<std::string, const ComboPackage*>& currentComboPackages)
-{
-	util::Map<int, const ComboPackage*> currentComboPackageIndexMap;
-	if (currentComboPackages.getSize() == 0)
-	{
-		throw std::runtime_error("No combo packages are available.\n");
-	}
-	int currentIndex = 1, choice, selectedIndex;
-	for (int iterator = 0; iterator < currentComboPackages.getSize(); iterator++)
-	{
-		if (currentComboPackages.getValueAt(iterator)->getState() == util::State::INACTIVE)
-		{
-			continue;
-		}
-		currentComboPackageIndexMap.insert(currentIndex++, currentComboPackages.getValueAt(iterator));
-	}
-	if (currentComboPackageIndexMap.getSize() == 0)
-	{
-		throw std::runtime_error("No combo packages currently active.");
-	}
-	displayComboPackagesWithIndex(currentComboPackageIndexMap);
-	std::cout << "Enter your choice(Index): ";
-	util::read(choice);
-	selectedIndex = currentComboPackageIndexMap.find(choice);
-	if (selectedIndex != -1)
-	{
-		std::string selectedComboPackageID = currentComboPackageIndexMap.getValueAt(selectedIndex)->getId();
-		return selectedComboPackageID;
-	}
-	else
-	{
-		std::cout << "Enter a valid choice.\n";
-		return "";
-	}
-}
-
-/*
-Function: removeComboPackage
-Description: Removes a selected combo package from the system.
-Parameter: None
-Return type: void
-*/
 void AdminMenu::removeComboPackage()
 {
-	util::clear();
-	util::Map<std::string, const ComboPackage*> currentComboPackages = m_controller.getComboPackages();
-	std::string selectedComboPackageID = selectComboPackage(currentComboPackages);
-	if (selectedComboPackageID != "")
-	{
-		m_controller.removeComboPackage(selectedComboPackageID);
-		std::cout << "Combo Package removed successfully.\n";
-	}
-	else
-	{
-		std::cout << "Combo package removal failed.\n";
-	}
-	util::pressEnter();
 }
 
 void AdminMenu::viewNotifications()

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/AdminMenu.h

@@ -1,11 +1,3 @@
-/*
-File: AdminMenu.h
-Description: Header file declaring the AdminMenu class, which provides
-             administrative operations such as inventory management,
-             user management, service configuration, and notifications.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include "Controller.h"
 

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/CustomerMenu.cpp

@@ -1,6 +1,15 @@
+#include <iomanip>
+#include <iostream>
 #include "CustomerMenu.h"
 #include "InputHelper.h"
 #include "OutputHelper.h"
+#include "Invoice.h"
+#include "Enums.h"
+#include "ServiceBooking.h"
+#include "User.h"
+#include "Timestamp.h"
+#include "Service.h"
+#include "InventoryItem.h"
 
 void CustomerMenu::showMenu()
 {
@@ -55,12 +64,197 @@ void CustomerMenu::viewServiceHistory()
 {
 }
 
-void CustomerMenu::completePayments()
+/*
+Function: selectInvoiceFromUserForPayment (static helper)
+Description: Lists all pending invoices for the customer and allows selection by index.
+Parameters:
+    - currentInvoices: util::Map<std::string, const Invoice*>&, map of customer invoices
+Returns:
+    - std::string: ID of the selected invoice, or empty string if none selected
+*/
+static std::string selectInvoiceFromUserForPayment(const util::Map<std::string, const Invoice*>& currentInvoices)
 {
+    int currentIndex = 1, choice;
+    util::Map<int, const Invoice*> pendingInvoicesForPayment;
+    std::cout << std::left
+        << std::setw(6) << "Index"
+        << std::setw(12) << "BookingID"
+        << std::setw(15) << "VehicleBrand"
+        << std::setw(15) << "VehicleNumber"
+        << std::setw(12) << "TechID"
+        << std::setw(20) << "TechnicianName"
+        << std::setw(10) << "Discount(%)"
+        << std::setw(12) << "TotalAmount"
+        << std::setw(20) << "InvoiceDate"
+        << std::endl;
+    for (int iterator = 0; iterator < currentInvoices.getSize(); iterator++)
+    {
+        const Invoice* currentInvoice = currentInvoices.getValueAt(iterator);
+        if (currentInvoice && currentInvoice->getStatus() == util::PaymentStatus::PENDING)
+        {
+            std::cout << std::left
+                << std::setw(6) << currentIndex
+                << std::setw(12) << currentInvoice->getBookingId()
+                << std::setw(15) << currentInvoice->getBooking()->getVehicleBrand()
+                << std::setw(15) << currentInvoice->getBooking()->getVehicleNumber()
+                << std::setw(12) << currentInvoice->getBooking()->getAssignedTechnician()->getId()
+                << std::setw(20) << currentInvoice->getBooking()->getAssignedTechnician()->getName()
+                << std::setw(10) << currentInvoice->getDiscountPercentage()
+                << std::setw(12) << currentInvoice->getTotalAmount()
+                << std::setw(20) << currentInvoice->getInvoiceDate().toString()
+                << std::endl;
+            pendingInvoicesForPayment.insert(currentIndex++, currentInvoice);
+        }
+    }
+    if (pendingInvoicesForPayment.getSize() == 0)
+    {
+        std::cout << "No pending invoices available for payment.\n";
+        return "";
+    }
+    std::cout << "Select the Invoice to pay (Index): ";
+    util::read(choice);
+    int selectedIndex = pendingInvoicesForPayment.find(choice);
+    if (selectedIndex != -1)
+    {
+        const Invoice* selectedInvoice = pendingInvoicesForPayment.getValueAt(selectedIndex);
+        return selectedInvoice->getId();
+    }
+    else
+    {
+        std::cout << "Invalid choice.\n";
+        return "";
+    }
 }
 
+/*
+Function: selectPaymentMode (static helper)
+Description: Allows the customer to select a payment mode (ONLINE or OFFLINE).
+Parameters:
+    - None
+Returns:
+    - util::PaymentMode: Selected payment mode
+*/
+static util::PaymentMode selectPaymentMode()
+{
+    int choice;
+    std::cout << "Enter the payment Mode\n1.OFFLINE\n2.ONLINE\nChoice: ";
+    util::read(choice);
+    if (choice == 1)
+    {
+        std::cout << "Offline mode selected.\n";
+        return util::PaymentMode::OFFLINE;
+    }
+    else if (choice == 2)
+    {
+        std::cout << "Online mode selected.\n";
+        return util::PaymentMode::ONLINE;
+    }
+    else
+    {
+        std::cout << "Invalid choice, Offline mode selected.\n";
+        return util::PaymentMode::OFFLINE;
+    }
+}
+
+/*
+Function: completePayments
+Description: Allows the customer to complete pending payments for invoices.
+             Validates invoice selection and payment mode before completing payment.
+Parameters:
+    - None
+Returns:
+    - void
+*/
+void CustomerMenu::completePayments()
+{
+	util::clear();
+	util::Map<std::string, const Invoice*> currentInvoices = m_controller.getInvoicesByUser();
+	std::string selectedID = selectInvoiceFromUserForPayment(currentInvoices);
+    if (selectedID == "")
+    {
+        std::cout << "Payment failed.\n";
+        return;
+    }
+    util::PaymentMode paymentMode = selectPaymentMode();
+    m_controller.completePayment(selectedID, paymentMode);
+    std::cout << "Payment completed successfully.\n";
+}
+
+/*
+Function: displayInvoices (static helper)
+Description: Displays detailed information for all invoices associated with the customer,
+             including booking details, technician, discount, total amount, payment status, and items used.
+Parameters:
+    - currentUserInvoices: util::Map<std::string, const Invoice*>, customer’s invoices
+Returns:
+    - void
+Throws:
+    - std::runtime_error if a null invoice is encountered
+*/
+static void displayInvoices(util::Map<std::string, const Invoice*> currentUserInvoices)
+{
+	if (currentUserInvoices.getSize() == 0)
+	{
+		std::cout << "No invoices found for this account." << std::endl;
+		util::pressEnter();
+		return;
+	}
+	else
+	{
+        for (int index = 0; index < currentUserInvoices.getSize(); index++)
+        {
+            const Invoice* currentInvoice = currentUserInvoices.getValueAt(index);
+            if (currentInvoice)
+            {
+                std::cout << "\nInvoice Details\n";
+                std::cout << "Booking ID: " << currentInvoice->getBookingId() << std::endl;
+                std::cout << "Vehicle Brand: " << currentInvoice->getBooking()->getVehicleBrand() << std::endl;
+                std::cout << "Vehicle Number: " << currentInvoice->getBooking()->getVehicleNumber() << std::endl;
+                std::cout << "Technician ID: " << currentInvoice->getBooking()->getAssignedTechnician()->getId() << std::endl;
+                std::cout << "Technician Name: " << currentInvoice->getBooking()->getAssignedTechnician()->getName() << std::endl;
+                std::cout << "Discount(%): " << currentInvoice->getDiscountPercentage() << std::endl;
+                std::cout << "Total Amount: " << currentInvoice->getTotalAmount() << std::endl;
+                std::cout << "Invoice Date: " << currentInvoice->getInvoiceDate().toString() << std::endl;
+                std::cout << "Payment Status: " << util::getPaymentStatusString(currentInvoice->getStatus()) << std::endl;
+                auto inventoryItemsInInvoice = currentInvoice->getParts();
+                std::cout << "\nItems Used:\n";
+                std::cout << std::left
+                    << std::setw(20) << "ItemName"
+                    << std::setw(10) << "Quantity"
+                    << std::setw(10) << "Price"
+                    << std::endl;
+                std::cout << std::string(40, '-') << std::endl;
+                for (int iterator = 0; iterator < inventoryItemsInInvoice.getSize(); iterator++)
+                {
+                    InventoryItem* currentItem = inventoryItemsInInvoice.getValueAt(iterator);
+                    std::cout << std::left
+                        << std::setw(20) << currentItem->getPartName()
+                        << std::setw(10) << currentItem->getQuantity()
+                        << std::setw(10) << currentItem->getPrice()
+                        << std::endl;
+                }
+            }
+            else
+            {
+                throw std::runtime_error("Null invoice encountered while displaying invoices.");
+            }
+        }
+	}
+}
+
+/*
+Function: viewInvoices
+Description: Displays invoices associated with the customer by calling displayInvoices.
+Parameters:
+    - None
+Returns:
+    - void
+*/
 void CustomerMenu::viewInvoices()
 {
+	util::clear();
+	util::Map<std::string, const Invoice*> currentUserInvoices = m_controller.getInvoicesByUser();
+	displayInvoices(currentUserInvoices);
 }
 
 void CustomerMenu::viewNotifications()

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/TechnicianMenu.cpp

@@ -1,80 +1,36 @@
-/*
-File: TechnicianMenu.cpp
-Description: Implementation file containing the method definitions of the
-             TechnicianMenu class, including menu handling, job completion,
-             notification viewing, password management, and logout logic.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "TechnicianMenu.h"
 #include "InputHelper.h"
 #include "OutputHelper.h"
-#include "Validator.h"
 
-/*
-Function: showMenu
-Description: Displays the technician menu and handles user input until logout is selected.
-Parameter: None
-Return type: void
-*/
 void TechnicianMenu::showMenu()
 {
-    while (true)
+	bool isMenuActive = true;
-    {
+	while (isMenuActive)
-        try
+	{
-        {
+		try
-            int choice;
+		{
-            util::clear();
+			int choice;
-            std::cout << "Technician Menu"
+			util::clear();
-                << "\n1. Mark Job as Completed"
+			std::cout << "" << std::endl;
-                << "\n2. View Notifications"
+			util::read(choice);
-                << "\n3. Change Password"
+			if (!handleOperation(choice))
-                << "\n4. Logout"
+			{
-                << "\nEnter a choice: ";
+				isMenuActive = false;
-            util::read(choice);
+			}
-            if (!handleOperation(choice))
+		}
-            {
+		catch (const std::exception& e)
-                break;
+		{
-            }
+			std::cout << "Exception: " << e.what() << std::endl;
-        }
+			util::pressEnter();
-        catch (const std::exception& e)
+		}
-        {
+	}
-            std::cout << "Exception: " << e.what() << std::endl;
-            util::pressEnter();
-        }
-    }
 }
 
-/*
-Function: handleOperation
-Description: Executes the corresponding technician operation based on the selected menu choice.
-Parameter: int choice - selected menu option
-Return type: bool - true if menu continues, false if logout
-*/
 bool TechnicianMenu::handleOperation(int choice)
 {
-    switch (choice)
+	return false;
-    {
-    case 1:
-        completeJob();
-        break;
-    case 2:
-        viewNotifications();
-        break;
-    case 3:
-        changePassword();
-        break;
-    case 4:
-        logout();
-        return false;
-    default:
-        std::cout << "Enter a valid choice!" << std::endl;
-        util::pressEnter();
-    }
-    return true;
 }
 
-
 void TechnicianMenu::completeJob()
 {
 }
@@ -82,41 +38,3 @@ void TechnicianMenu::completeJob()
 void TechnicianMenu::viewNotifications()
 {
 }
-
-/*
-Function: logout
-Description: Logs out the currently authenticated technician user.
-Parameter: None
-Return type: void
-*/
-void TechnicianMenu::logout()
-{
-	m_controller.logout();
-}
-
-/*
-Function: changePassword
-Description: Allows the technician to change their password after validation.
-Parameter: None
-Return type: void
-*/
-void TechnicianMenu::changePassword()
-{
-	std::string newPassword;
-	while (true)
-	{
-		util::clear();
-		std::cout << "Enter new password: ";
-		util::read(newPassword);
-		if (!util::isPasswordValid(newPassword))
-		{
-			std::cout << "Error: Password is not strong enough!\n";
-			util::pressEnter();
-			continue;
-		}
-		m_controller.changePassword(newPassword);
-		std::cout << "Password changed successfully\n";
-		util::pressEnter();
-		break;
-	}
-}

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/TechnicianMenu.h

@@ -1,11 +1,3 @@
-/*
-File: TechnicianMenu.h
-Description: Header file declaring the TechnicianMenu class, which provides
-             technician operations such as job completion, notification viewing,
-             password management, and logout functionality.
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include "Controller.h"
 
@@ -18,6 +10,4 @@ public:
     void showMenu();
     void completeJob();
     void viewNotifications();
-    void logout();
-    void changePassword();
 };

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/UserInterface.cpp

@@ -1,23 +1,7 @@
-/*
-File: UserInterface.cpp
-Description: Implementation file containing the method definitions of the
-			 UserInterface class, including system run loop, login handling,
-			 and customer registration logic.
-Author: Trenser
-Date:19-May-2026
-*/
 #include "UserInterface.h"
 #include "InputHelper.h"
 #include "OutputHelper.h"
-#include "User.h"
 
-/*
-Function: run
-Description: Runs the main system loop, displaying the initial menu for login,
-			 customer registration, or exit. Handles exceptions gracefully.
-Parameter: None
-Return type: void
-*/
 void UserInterface::run()
 {
 	bool isMenuActive = true;
@@ -42,12 +26,6 @@ void UserInterface::run()
 	}
 }
 
-/*
-Function: handleOperation
-Description: Executes the corresponding system operation based on the selected menu choice.
-Parameter: int choice - selected menu option
-Return type: bool - true if menu continues, false if exit
-*/
 bool UserInterface::handleOperation(int choice)
 {
 	switch (choice)
@@ -68,47 +46,9 @@ bool UserInterface::handleOperation(int choice)
 	return true;
 }
 
-/*
-Function: login
-Description: Handles user login by validating credentials. Based on the authenticated
-			 user type, navigates to the appropriate menu (Admin, Technician, Customer).
-Parameter: None
-Return type: void
-*/
 void UserInterface::login()
 {
-	std::string username, password;
+
-	util::clear();
-	std::cout << "Enter username: ";
-	util::read(username);
-	std::cout << "Enter password: ";
-	util::read(password);
-	if (m_controller.login(username, password))
-	{
-		const User* authenticatedUser = m_controller.getAuthenticatedUser();
-		if (authenticatedUser != nullptr)
-		{
-			switch (authenticatedUser->getUserType())
-			{
-			case util::UserType::ADMIN:
-				m_adminMenu.showMenu();
-				break;
-			case util::UserType::TECHNICIAN:
-				m_technicianMenu.showMenu();
-				break;
-			case util::UserType::CUSTOMER:
-				m_customerMenu.showMenu();
-				break;
-			default:
-				std::cout << "\nError: Unknown user type";
-				break;
-			}
-		}
-	}
-	else
-	{
-		std::cout << "\nError: Invalid Username or Password";
-	}
 }
 
 void UserInterface::registerCustomer()

Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/UserInterface.h

@@ -1,12 +1,3 @@
-/*
-File: UserInterface.h
-Description: Header file declaring the UserInterface class, which provides
-             the main entry point for the Vehicle Service System. Handles
-             login, customer registration, and menu navigation for different
-             user roles (Admin, Technician, Customer).
-Author: Trenser
-Date:19-May-2026
-*/
 #pragma once
 #include "Controller.h"
 #include "AdminMenu.h"