# Walkthrough - Logout Functionality

I have implemented the logout functionality in the Employee Portal.

## Changes Made

### Authentication State
- Added a `logout()` function in [auth_state.dart](file:///home/itc43/Documents/HOKBEN_PROJECT/ESS%20PROJECT/Employee%20Portal%20Design/flutter-code/lib/auth_state.dart) to reset all global session variables:
  - `isLoggedIn` set to `false`
  - `loggedInNik`, `loggedInName`, `loggedInImage`, `loggedInPosition` set to `null`

### Layout
- Implemented a confirmation dialog in [root_layout.dart](file:///home/itc43/Documents/HOKBEN_PROJECT/ESS%20PROJECT/Employee%20Portal%20Design/flutter-code/lib/layout/root_layout.dart).
- Connected the logout button (using `LucideIcons.logOut`) to trigger the dialog.
- Clicking "OK" in the dialog will:
  1. Call the `logout()` function.
  2. Pop the dialog.
  3. Navigate the user back to the `/login` page.

### Router
- Enhanced the `redirect` logic in [main.dart](file:///home/itc43/Documents/HOKBEN_PROJECT/ESS%20PROJECT/Employee%20Portal%20Design/flutter-code/lib/main.dart) to enforce authentication:
  - If a user is not logged in (`isLoggedIn == false`), they are strictly redirected to `/login` for any protected route.
  - If a user is logged in, they are redirected away from `/login` to the dashboard.
  - This prevents users from using the browser's "back" button to return to the dashboard after logging out.

## Verification Results

### Code Quality
- Verified that all necessary imports are present (`go_router.dart`, `auth_state.dart`).
- Fixed class structure issues in `root_layout.dart`.

### Logic Verification
- The logout flow correctly handles session clearing before navigation.
- The use of `context.go('/login')` ensures that the user is redirected to the login page and cannot easily navigate back to protected routes (as the `redirect` logic in `main.dart` will catch them if `isLoggedIn` is false).

> [!NOTE]
> Since I cannot run the application in a live browser for this task, I have verified the implementation through code analysis.