Add user authentication system with TDD (registration, login, logout, password reset)

[Copilot]

Implements full authentication system using Test-Driven Development. Backend uses JWT tokens with bcrypt password hashing. Frontend provides unified login/registration/password-reset UI.

Backend API

Added 5 authentication endpoints at /api/auth/*:

• POST /register - Email/password registration with validation (min 8 chars)
• POST /login - Returns JWT token (24h expiration) + user data
• POST /logout - Client-side token invalidation endpoint
• POST /request-reset - Generates reset token (1h expiration)
• POST /reset-password - Validates token and updates password

Implementation details:

• User model with bcrypt hashed passwords (10 rounds)
• JWT secret from JWT_SECRET env var (warns if using default)
• In-memory storage with seed data (3 test users)
• Reset tokens only returned in non-production environments
• Full Swagger documentation at /api-docs

Test coverage: 18 tests covering success/failure paths for all endpoints

Frontend

Enhanced Login component with multi-mode state machine:

• Login form (email + password)
• Registration form (email + password + confirm)
• Password reset request (email only)
• Password reset with token (new password + confirm)

AuthContext now integrates with API:

• JWT tokens stored in localStorage
• Automatic token injection via axios interceptors
• Persistent login across page refreshes

Example Usage

// Backend - Login endpoint
router.post('/login', (req: Request, res: Response) => {
  const user = users.find(u => u.email === email);
  const isValid = bcrypt.compareSync(password, user.passwordHash);
  const token = jwt.sign({ userId, email, isAdmin }, JWT_SECRET, { expiresIn: '24h' });
  res.json({ token, user: { userId, email, isAdmin } });
});

// Frontend - AuthContext
const login = async (email: string, password: string) => {
  const response = await axios.post(`${API_BASE_URL}/api/auth/login`, { email, password });
  setStoredToken(response.data.token);
  axios.defaults.headers.common['Authorization'] = `Bearer ${token}`;
};

Screenshots

Login Page

Registration Page

Security

• Email format validation with regex
• Password strength validation (min 8 chars)
• Bcrypt hashing with salt rounds
• JWT token expiration
• No credentials in logs or responses
• CodeQL scan: 0 vulnerabilities

Original prompt

Now implement the plan outlined above using TDD principles.

The user has attached the following file paths as relevant context:

• .github\copilot-instructions.md
• PRODUCT.md
• ARCHITECTURE.md
• CONTRIBUTING.md

[Chronological Review: The conversation began with a user request to add user authentication features (registration, login, logout, and password reset) to the project. The user then requested to implement this plan using Test-Driven Development (TDD) principles. The conversation has focused on defining the requirements and the approach for implementing these features.]

[Intent Mapping:

1. "Add user authentication with email and password, including registration, login, logout, and password reset functionality." - User requested specific authentication features.
2. "Now implement the plan outlined above using TDD principles." - User requested the implementation of the authentication features using TDD.]

[Technical Inventory:

• Repository: GitHubCopilot_Customized
• Current branch: agent-handoff
• Default branch: main
• Technologies: TDD principles for implementing user authentication.]

[Code Archaeology: No specific files or code changes have been discussed yet, as the focus has been on planning the implementation.]

[Progress Assessment:

• Completed Tasks: None yet, as the conversation has focused on planning.
• Partially Complete Work: The plan for user authentication is outlined but not yet implemented.
• Validated Outcomes: None, as implementation has not started.]

[Context Validation: The user has requested user authentication features and specified the use of TDD for implementation. This context is crucial for continuing the work.]

[Recent Commands Analysis:

• Last Agent Commands: The user requested to implement user authentication features using TDD principles.
• Tool Results Summary: No tool results were generated as the conversation has been focused on user requests.
• Pre-Summary State: The agent was preparing to implement user authentication features using TDD principles when the token budget was exceeded.
• Operation Context: The commands executed were directly related to the user's goal of adding authentication functionality to the project.]

1. Conversation Overview: - Primary Objectives: - "Add user authentication with email and password, including registration, login, logout, and password reset functionality." - "Now implement the plan outlined above using TDD principles." - Session Context: The conversation has focused on defining and planning the implementation of user authentication features. - User Intent Evolution: The user has consistently aimed to enhance the project with authentication features and has specified a TDD approach for implementation.

2. Technical Foundation:

• Repository: GitHubCopilot_Customized
• Current branch: agent-handoff
• Default branch: main
• TDD Principles: The user intends to apply TDD for the implementation of the authentication features.

3. Codebase Status:

• No specific files or code changes have been discussed yet, as the focus has been on planning the implementation.

4. Problem Resolution:

• Issues Encountered: None yet, as implementation has not started.
• Solutions Implemented: None, as the conversation has been focused on planning.
• Debugging Context: No ongoing troubleshooting efforts have been discussed.
• Lessons Learned: No insights have been documented yet.

5. Progress Tracking:

• Completed Tasks: None, as the conversation has focused on planning.
• Partially Complete Work: The plan for user authentication is outlined but not yet implemented.
• Validated Outcomes: None, as implementation has not started.

6. Active Work State:

• Current Focus: The user is focused on implementing user authentication features using TDD principles.
• Recent Context: The last few exchanges have centered around the request for user authentication features and the implementation approach.
• Working Code: No code snippets have been modified or discussed recently.
• Immediate Context: The specific problem being addressed is the implementation of user authentication features.

7. Recent Operations:

• Last Agent Commands: The user requested to implement user authentication features using TDD principles.
• Tool Results Summary: No tool results were generated as the conversation has been focused on user requests.
• Pre-Summary State: The agent was preparing to implement user authentication features using TDD principles when the token budget was exceeded.
• Operation Context: The commands executed were directly related to the user's goal of adding authentication functionality to the project.

8. Continuation Plan:

• [Pending Task 1]: Implement user authentication features (registration, login, logout, password reset) using TDD principles.
• [Pending Task 2]: Define specific test cases and implementation steps for each authentication feature.
• [Priority Information]: The implementation of user authentication i...

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