From fa08d4a90fb619c304cee4079a8d63c583d6531b Mon Sep 17 00:00:00 2001
From: Avinash Rajesh <avinash.rajesh@trenser.com>
Date: Wed, 20 May 2026 19:42:45 +0530
Subject: [PATCH] Implement Login Functionality
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<UserStory> ADM003: Login </UserStory>

<Changes>
    1. Added credential input handling in UserInterface::login with username and password prompts.
    2. Integrated Controller::login to validate credentials and retrieve authenticated user.
    3. Implemented role-based menu navigation: Admin → AdminMenu, Technician → TechnicianMenu, Customer → CustomerMenu.
    4. Added error handling for invalid credentials and unknown user types with clear feedback messages.
    5. Included util::clear for screen refresh and structured output formatting during login.
</Changes>

<Test>

  Precondition:
  1. Valid user accounts exist in the system (Admin, Technician, Customer).
  2. Controller is connected to UserManagementService for authentication.
  3. UserInterface is initialized with role-specific menus.

  Steps:
  1. Launch UserInterface and select "Login".
  2. Enter incorrect username or password.
    - Verify that system displays "Error: Invalid Username or Password".
  3. Enter valid admin credentials.
    - Verify that AdminMenu is displayed successfully.
  4. Enter valid technician or customer credentials.
    - Verify that TechnicianMenu or CustomerMenu is displayed accordingly.
</Test>

<Review>
Sreeja Reghukumar
</Review>
---
 .../views/UserInterface.cpp                   | 34 ++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/UserInterface.cpp b/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/UserInterface.cpp
index 122f9a8..3fa0ea6 100644
--- a/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/UserInterface.cpp
+++ b/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/views/UserInterface.cpp
@@ -1,6 +1,7 @@
 #include "UserInterface.h"
 #include "InputHelper.h"
 #include "OutputHelper.h"
+#include "User.h"
 
 void UserInterface::run()
 {
@@ -48,7 +49,38 @@ bool UserInterface::handleOperation(int choice)
 
 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()