🔐 [Task #2] Design and Implement Authentication System

[Wanko-IT]

📋 Task Overview

Priority: High
Status: Pending
Dependencies: Task #1 (Setup Project Repository)

🎯 Description

Implement user authentication using Firebase Authentication or Auth0 with comprehensive user management features.

🏗️ Implementation Details

Authentication Provider Options

1. Firebase Authentication (Recommended)

   • Google, GitHub, email/password login
   • Built-in user management
   • Easy integration with React/Next.js

2. Auth0 Alternative

   • Enterprise-grade authentication
   • Social login providers
   • Advanced security features

Core Features

• User Registration/Login

  • Email/password authentication
  • Social login (Google, GitHub, Discord)
  • Email verification
  • Password reset functionality

• Session Management

  • JWT token handling
  • Refresh token rotation
  • Automatic logout on expiration

• User Profile

  • Profile information management
  • Avatar upload functionality
  • Account settings

Frontend Implementation

// components/auth/AuthProvider.tsx
import { createContext, useContext, useEffect, useState } from 'react'
import { auth } from '@/lib/firebase'
import { User } from 'firebase/auth'

interface AuthContext {
  user: User | null
  loading: boolean
  login: (email: string, password: string) => Promise<void>
  logout: () => Promise<void>
  register: (email: string, password: string) => Promise<void>
}

// pages/auth/login.tsx
import { useAuth } from '@/hooks/useAuth'
import { LoginForm } from '@/components/auth/LoginForm'

export default function LoginPage() {
  return <LoginForm />
}

Backend API Endpoints

POST /api/auth/register
POST /api/auth/login  
POST /api/auth/logout
POST /api/auth/refresh
GET  /api/auth/profile
PUT  /api/auth/profile
POST /api/auth/forgot-password
POST /api/auth/reset-password

Database Schema

-- Users table
CREATE TABLE users (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  firebase_uid VARCHAR UNIQUE NOT NULL,
  email VARCHAR UNIQUE NOT NULL,
  display_name VARCHAR,
  avatar_url VARCHAR,
  subscription_tier VARCHAR DEFAULT 'free',
  created_at TIMESTAMP DEFAULT NOW(),
  updated_at TIMESTAMP DEFAULT NOW()
);

-- User sessions
CREATE TABLE user_sessions (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID REFERENCES users(id),
  refresh_token VARCHAR NOT NULL,
  expires_at TIMESTAMP NOT NULL,
  created_at TIMESTAMP DEFAULT NOW()
);

🧪 Test Strategy

1. Unit Tests

   • Authentication flow functions
   • Token validation logic
   • User profile operations

2. Integration Tests

   • Full login/logout flow
   • Token refresh mechanism
   • Password reset process

3. E2E Tests

   • User registration workflow
   • Social login integration
   • Protected route access

📚 Acceptance Criteria

• Firebase/Auth0 integration configured
• User registration with email verification
• Login/logout functionality
• Social login providers (Google, GitHub)
• Password reset functionality
• JWT token management
• Protected routes implementation
• User profile management
• Session persistence
• Comprehensive error handling
• Security best practices implemented

🔗 Related Tasks

Enables:

• Task 🎨 [Task #3] Develop Core Dashboard UI Framework #4: File Storage and Management System
• Task #11: Usage Tracking and Billing System
• Task #15: Team and Enterprise Features

📝 Security Considerations

• HTTPS enforcement
• CSRF protection
• Rate limiting for auth endpoints
• Secure token storage
• Input validation and sanitization
• Account lockout after failed attempts