A full-featured task management REST API built with Next.js 16, Prisma ORM, and PostgreSQL. This API provides user authentication and CRUD operations for managing tasks with JWT-based authorization.

• User Authentication: Register and login with secure password hashing (bcrypt)
• JWT Authorization: Secure API endpoints with JSON Web Tokens
• Task Management: Create, read, update, and delete tasks
• Task Status Tracking: Track tasks with three statuses: PENDING, IN_PROGRESS, COMPLETED
• User Isolation: Users can only access and manage their own tasks
• Database: PostgreSQL with Prisma ORM

• Framework: Next.js 16 (App Router)
• Database: PostgreSQL
• ORM: Prisma
• Authentication: JWT (jsonwebtoken)
• Password Hashing: bcryptjs
• Language: TypeScript

• Node.js 18+ or Bun
• PostgreSQL database

1. Clone the repository:

git clone https://github.com/cypherab01/task-manager-api
cd task-manager-api

1. Install dependencies:

npm install
# or
bun install

1. Set up environment variables:

Create a .env file in the root directory:

DATABASE_URL="postgresql://username:password@localhost:5432/task_manager"
JWT_SECRET="your-secret-key-here"

1. Run database migrations:

npx prisma migrate deploy
# or generate the Prisma client
npx prisma generate

1. Start the development server:

npm run dev
# or
bun dev

The API will be available at http://localhost:3000

POST /api/auth/register
Content-Type: application/json

{
  "name": "John Doe",
  "email": "john@example.com",
  "password": "securepassword"
}

Response (201):

{
  "user": {
    "id": "clxxx...",
    "email": "john@example.com"
  }
}

POST /api/auth/login
Content-Type: application/json

{
  "email": "john@example.com",
  "password": "securepassword"
}

Response (200):

{
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "user": {
    "id": "clxxx...",
    "email": "john@example.com"
  }
}

All task endpoints require authentication. Include the JWT token in the Authorization header:

Authorization: Bearer <your-token>

GET /api/tasks
Authorization: Bearer <token>

Response (200):

[
  {
    "id": "clxxx...",
    "title": "Complete project",
    "description": "Finish the task manager API",
    "status": "IN_PROGRESS",
    "userId": "clxxx...",
    "createdAt": "2024-11-02T10:00:00.000Z",
    "updatedAt": "2024-11-02T11:00:00.000Z"
  }
]

POST /api/tasks
Authorization: Bearer <token>
Content-Type: application/json

{
  "title": "New Task",
  "description": "Task description"
}

Response (201):

{
  "message": "Task created successfully",
  "task": {
    "title": "New Task",
    "description": "Task description",
    "status": "PENDING"
  }
}

PATCH /api/tasks/[id]
Authorization: Bearer <token>
Content-Type: application/json

{
  "status": "COMPLETED"
}

Valid Status Values:

• PENDING
• IN_PROGRESS
• COMPLETED

Response (200):

{
  "id": "clxxx...",
  "title": "Task title",
  "description": "Task description",
  "status": "COMPLETED",
  "userId": "clxxx...",
  "createdAt": "2024-11-02T10:00:00.000Z",
  "updatedAt": "2024-11-02T12:00:00.000Z"
}

DELETE /api/tasks/[id]
Authorization: Bearer <token>

Response (200):

{
  "message": "Task deleted successfully"
}

model User {
  id        String    @id @default(cuid())
  name      String
  email     String    @unique
  password  String
  tasks     Task[]
  createdAt DateTime  @default(now())
  updatedAt DateTime  @updatedAt
}

model Task {
  id          String     @id @default(cuid())
  title       String
  description String?
  status      TaskStatus @default(PENDING)
  user        User       @relation(fields: [userId], references: [id])
  userId      String
  createdAt   DateTime   @default(now())
  updatedAt   DateTime   @updatedAt
}

enum TaskStatus {
  PENDING
  IN_PROGRESS
  COMPLETED
}

The API uses standard HTTP status codes:

• 200 - Success
• 201 - Created
• 400 - Bad Request (invalid input)
• 401 - Unauthorized (missing or invalid token)
• 404 - Not Found
• 500 - Internal Server Error

Error Response Format:

{
  "error": "Error message description"
}

• npm run dev - Start development server
• npm run build - Build for production
• npm run start - Start production server
• npm run lint - Run ESLint

• npx prisma migrate dev - Create and apply migrations
• npx prisma generate - Generate Prisma Client
• npx prisma studio - Open Prisma Studio (database GUI)

1. Push your code to GitHub
2. Import your repository on Vercel
3. Add environment variables in Vercel dashboard:
   • DATABASE_URL
   • JWT_SECRET
4. Deploy!

Make sure to set these environment variables in your production environment:

• DATABASE_URL - Your PostgreSQL connection string
• JWT_SECRET - A strong, random secret key for JWT signing

• Passwords are hashed using bcrypt with a salt factor of 10
• JWT tokens expire after 7 days
• All task operations verify user ownership
• SQL injection protection through Prisma ORM

MIT

Contributions are welcome! Please feel free to submit a Pull Request.