Build complete Personal Task Management API with FastAPI

- Implemented user authentication with JWT tokens
- Created comprehensive task management with CRUD operations
- Added category system for task organization
- Set up SQLite database with SQLAlchemy ORM
- Configured Alembic for database migrations
- Added API documentation with OpenAPI/Swagger
- Implemented proper authorization and user scoping
- Created health check and root endpoints
- Updated README with complete documentation

README.md

@@ -1,3 +1,154 @@
-# FastAPI Application
+# Personal Task Management API
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A comprehensive FastAPI-based REST API for managing personal tasks, categories, and user authentication. Built with Python, FastAPI, SQLAlchemy, and SQLite.
+
+## Features
+
+- **User Authentication**: JWT-based authentication with registration and login
+- **Task Management**: Full CRUD operations for tasks with status and priority tracking
+- **Category Management**: Organize tasks with custom categories
+- **User Authorization**: All operations are user-scoped and protected
+- **Database Migrations**: Alembic for database schema management
+- **API Documentation**: Auto-generated OpenAPI/Swagger documentation
+
+## Quick Start
+
+### Prerequisites
+
+- Python 3.8+
+- pip
+
+### Installation
+
+1. Install dependencies:
+```bash
+pip install -r requirements.txt
+```
+
+2. Run database migrations:
+```bash
+alembic upgrade head
+```
+
+3. Start the application:
+```bash
+uvicorn main:app --reload
+```
+
+The API will be available at `http://localhost:8000`
+
+### API Documentation
+
+- Swagger UI: `http://localhost:8000/docs`
+- ReDoc: `http://localhost:8000/redoc`
+- OpenAPI JSON: `http://localhost:8000/openapi.json`
+
+## API Endpoints
+
+### Authentication
+- `POST /auth/register` - Register a new user
+- `POST /auth/login` - Login with email and password
+- `GET /auth/me` - Get current user information
+
+### Tasks
+- `GET /tasks/` - List all tasks (with filtering options)
+- `POST /tasks/` - Create a new task
+- `GET /tasks/{task_id}` - Get a specific task
+- `PUT /tasks/{task_id}` - Update a task
+- `DELETE /tasks/{task_id}` - Delete a task
+
+### Categories
+- `GET /categories/` - List all categories
+- `POST /categories/` - Create a new category
+- `GET /categories/{category_id}` - Get a specific category
+- `PUT /categories/{category_id}` - Update a category
+- `DELETE /categories/{category_id}` - Delete a category
+
+### System
+- `GET /` - API information and links
+- `GET /health` - Health check endpoint
+
+## Data Models
+
+### Task
+- `id`: Unique identifier
+- `title`: Task title (required)
+- `description`: Optional task description
+- `status`: pending, in_progress, completed, cancelled
+- `priority`: low, medium, high, urgent
+- `due_date`: Optional due date
+- `category_id`: Optional category association
+- `completed_at`: Timestamp when task was completed
+- `created_at/updated_at`: Timestamps
+
+### Category
+- `id`: Unique identifier
+- `name`: Category name (required)
+- `description`: Optional description
+- `color`: Optional color code
+- `created_at/updated_at`: Timestamps
+
+### User
+- `id`: Unique identifier
+- `email`: User email (unique, required)
+- `full_name`: Optional full name
+- `is_active`: Account status
+- `created_at/updated_at`: Timestamps
+
+## Environment Variables
+
+Set the following environment variables for production:
+
+- `SECRET_KEY`: JWT secret key for token signing (required for production)
+
+Example:
+```bash
+export SECRET_KEY="your-super-secret-key-here"
+```
+
+## Database
+
+The application uses SQLite by default with the database file stored at `/app/storage/db/db.sqlite`. The database is automatically created when the application starts.
+
+## Authentication
+
+The API uses JWT bearer tokens for authentication. To access protected endpoints:
+
+1. Register a new user or login with existing credentials
+2. Include the access token in the Authorization header: `Authorization: Bearer <token>`
+
+## Development
+
+### Code Quality
+
+The project uses Ruff for linting and code formatting:
+
+```bash
+ruff check .
+ruff format .
+```
+
+### Database Migrations
+
+Create new migrations after model changes:
+
+```bash
+alembic revision --autogenerate -m "Description of changes"
+alembic upgrade head
+```
+
+## Architecture
+
+- **FastAPI**: Modern, fast web framework for building APIs
+- **SQLAlchemy**: ORM for database operations
+- **Alembic**: Database migration tool
+- **Pydantic**: Data validation using Python type annotations
+- **JWT**: JSON Web Tokens for authentication
+- **SQLite**: Lightweight database for development and small deployments
+
+The application follows a clean architecture pattern with separate layers for:
+- API routes (`app/api/`)
+- Database models (`app/models/`)
+- Data schemas (`app/schemas/`)
+- Core utilities (`app/core/`)
+- Database configuration (`app/db/`)

alembic.ini

@@ -0,0 +1,41 @@
+[alembic]
+script_location = alembic
+prepend_sys_path = .
+version_path_separator = os
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+[post_write_hooks]
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

alembic/env.py

@@ -0,0 +1,51 @@
+from logging.config import fileConfig
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from alembic import context
+import sys
+import os
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
+
+from app.db.base import Base
+
+config = context.config
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+def run_migrations_offline() -> None:
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

alembic/versions/001_initial_migration.py

@@ -0,0 +1,77 @@
+"""Initial migration
+
+Revision ID: 001
+Revises: 
+Create Date: 2024-12-20 12:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '001'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Create users table
+    op.create_table('users',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('email', sa.String(), nullable=False),
+    sa.Column('hashed_password', sa.String(), nullable=False),
+    sa.Column('full_name', sa.String(), nullable=True),
+    sa.Column('is_active', sa.Boolean(), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
+    op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=False)
+    
+    # Create categories table
+    op.create_table('categories',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('name', sa.String(), nullable=False),
+    sa.Column('description', sa.String(), nullable=True),
+    sa.Column('color', sa.String(), nullable=True),
+    sa.Column('owner_id', sa.Integer(), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+    sa.ForeignKeyConstraint(['owner_id'], ['users.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_categories_id'), 'categories', ['id'], unique=False)
+    
+    # Create tasks table
+    op.create_table('tasks',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('title', sa.String(), nullable=False),
+    sa.Column('description', sa.Text(), nullable=True),
+    sa.Column('status', sa.Enum('PENDING', 'IN_PROGRESS', 'COMPLETED', 'CANCELLED', name='taskstatus'), nullable=True),
+    sa.Column('priority', sa.Enum('LOW', 'MEDIUM', 'HIGH', 'URGENT', name='taskpriority'), nullable=True),
+    sa.Column('due_date', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('completed_at', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('owner_id', sa.Integer(), nullable=True),
+    sa.Column('category_id', sa.Integer(), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+    sa.ForeignKeyConstraint(['category_id'], ['categories.id'], ),
+    sa.ForeignKeyConstraint(['owner_id'], ['users.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_tasks_id'), 'tasks', ['id'], unique=False)
+    op.create_index(op.f('ix_tasks_title'), 'tasks', ['title'], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f('ix_tasks_title'), table_name='tasks')
+    op.drop_index(op.f('ix_tasks_id'), table_name='tasks')
+    op.drop_table('tasks')
+    op.drop_index(op.f('ix_categories_id'), table_name='categories')
+    op.drop_table('categories')
+    op.drop_index(op.f('ix_users_id'), table_name='users')
+    op.drop_index(op.f('ix_users_email'), table_name='users')
+    op.drop_table('users')

app/__init__.py

@@ -0,0 +1 @@
+# App package

app/api/__init__.py

@@ -0,0 +1 @@
+# API modules

app/api/auth.py

@@ -0,0 +1,60 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import HTTPBearer
+from sqlalchemy.orm import Session
+from app.db.session import get_db
+from app.core.security import verify_password, get_password_hash, create_access_token
+from app.core.deps import get_current_active_user
+from app.models.user import User as UserModel
+from app.schemas.user import User, UserCreate, Token
+
+router = APIRouter()
+security = HTTPBearer()
+
+@router.post("/register", response_model=User)
+def register(
+    user: UserCreate,
+    db: Session = Depends(get_db)
+):
+    # Check if user already exists
+    db_user = db.query(UserModel).filter(UserModel.email == user.email).first()
+    if db_user:
+        raise HTTPException(
+            status_code=400,
+            detail="Email already registered"
+        )
+    
+    # Create new user
+    hashed_password = get_password_hash(user.password)
+    db_user = UserModel(
+        email=user.email,
+        hashed_password=hashed_password,
+        full_name=user.full_name,
+        is_active=user.is_active
+    )
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+@router.post("/login", response_model=Token)
+def login(
+    email: str,
+    password: str,
+    db: Session = Depends(get_db)
+):
+    user = db.query(UserModel).filter(UserModel.email == email).first()
+    if not user or not verify_password(password, user.hashed_password):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    if not user.is_active:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    
+    access_token = create_access_token(subject=user.id)
+    return {"access_token": access_token, "token_type": "bearer"}
+
+@router.get("/me", response_model=User)
+def read_users_me(current_user: UserModel = Depends(get_current_active_user)):
+    return current_user

app/api/categories.py

@@ -0,0 +1,87 @@
+from typing import List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+from app.db.session import get_db
+from app.core.deps import get_current_active_user
+from app.models.user import User
+from app.models.category import Category as CategoryModel
+from app.schemas.category import Category, CategoryCreate, CategoryUpdate
+
+router = APIRouter()
+
+@router.post("/", response_model=Category)
+def create_category(
+    category: CategoryCreate,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    db_category = CategoryModel(**category.dict(), owner_id=current_user.id)
+    db.add(db_category)
+    db.commit()
+    db.refresh(db_category)
+    return db_category
+
+@router.get("/", response_model=List[Category])
+def read_categories(
+    skip: int = 0,
+    limit: int = 100,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    categories = db.query(CategoryModel).filter(
+        CategoryModel.owner_id == current_user.id
+    ).offset(skip).limit(limit).all()
+    return categories
+
+@router.get("/{category_id}", response_model=Category)
+def read_category(
+    category_id: int,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    category = db.query(CategoryModel).filter(
+        CategoryModel.id == category_id,
+        CategoryModel.owner_id == current_user.id
+    ).first()
+    if category is None:
+        raise HTTPException(status_code=404, detail="Category not found")
+    return category
+
+@router.put("/{category_id}", response_model=Category)
+def update_category(
+    category_id: int,
+    category_update: CategoryUpdate,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    category = db.query(CategoryModel).filter(
+        CategoryModel.id == category_id,
+        CategoryModel.owner_id == current_user.id
+    ).first()
+    if category is None:
+        raise HTTPException(status_code=404, detail="Category not found")
+    
+    update_data = category_update.dict(exclude_unset=True)
+    for field, value in update_data.items():
+        setattr(category, field, value)
+    
+    db.commit()
+    db.refresh(category)
+    return category
+
+@router.delete("/{category_id}")
+def delete_category(
+    category_id: int,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    category = db.query(CategoryModel).filter(
+        CategoryModel.id == category_id,
+        CategoryModel.owner_id == current_user.id
+    ).first()
+    if category is None:
+        raise HTTPException(status_code=404, detail="Category not found")
+    
+    db.delete(category)
+    db.commit()
+    return {"message": "Category deleted successfully"}

app/api/tasks.py

@@ -0,0 +1,102 @@
+from typing import List, Optional
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from datetime import datetime
+from app.db.session import get_db
+from app.core.deps import get_current_active_user
+from app.models.user import User
+from app.models.task import Task as TaskModel, TaskStatus
+from app.schemas.task import Task, TaskCreate, TaskUpdate
+
+router = APIRouter()
+
+@router.post("/", response_model=Task)
+def create_task(
+    task: TaskCreate,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    db_task = TaskModel(**task.dict(), owner_id=current_user.id)
+    db.add(db_task)
+    db.commit()
+    db.refresh(db_task)
+    return db_task
+
+@router.get("/", response_model=List[Task])
+def read_tasks(
+    skip: int = 0,
+    limit: int = 100,
+    status: Optional[TaskStatus] = Query(None),
+    category_id: Optional[int] = Query(None),
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    query = db.query(TaskModel).filter(TaskModel.owner_id == current_user.id)
+    
+    if status:
+        query = query.filter(TaskModel.status == status)
+    if category_id:
+        query = query.filter(TaskModel.category_id == category_id)
+    
+    tasks = query.offset(skip).limit(limit).all()
+    return tasks
+
+@router.get("/{task_id}", response_model=Task)
+def read_task(
+    task_id: int,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    task = db.query(TaskModel).filter(
+        TaskModel.id == task_id,
+        TaskModel.owner_id == current_user.id
+    ).first()
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    return task
+
+@router.put("/{task_id}", response_model=Task)
+def update_task(
+    task_id: int,
+    task_update: TaskUpdate,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    task = db.query(TaskModel).filter(
+        TaskModel.id == task_id,
+        TaskModel.owner_id == current_user.id
+    ).first()
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    
+    update_data = task_update.dict(exclude_unset=True)
+    
+    # Set completed_at when task is marked as completed
+    if update_data.get("status") == TaskStatus.COMPLETED and task.status != TaskStatus.COMPLETED:
+        update_data["completed_at"] = datetime.utcnow()
+    elif update_data.get("status") != TaskStatus.COMPLETED:
+        update_data["completed_at"] = None
+    
+    for field, value in update_data.items():
+        setattr(task, field, value)
+    
+    db.commit()
+    db.refresh(task)
+    return task
+
+@router.delete("/{task_id}")
+def delete_task(
+    task_id: int,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_active_user)
+):
+    task = db.query(TaskModel).filter(
+        TaskModel.id == task_id,
+        TaskModel.owner_id == current_user.id
+    ).first()
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    
+    db.delete(task)
+    db.commit()
+    return {"message": "Task deleted successfully"}

app/core/__init__.py

@@ -0,0 +1 @@
+# Core modules

app/core/deps.py

@@ -0,0 +1,39 @@
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from jose import jwt, JWTError
+from sqlalchemy.orm import Session
+from app.db.session import get_db
+from app.core.security import SECRET_KEY, ALGORITHM
+from app.models.user import User
+
+security = HTTPBearer()
+
+def get_current_user(
+    db: Session = Depends(get_db),
+    credentials: HTTPAuthorizationCredentials = Depends(security)
+) -> User:
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    
+    try:
+        payload = jwt.decode(credentials.credentials, SECRET_KEY, algorithms=[ALGORITHM])
+        user_id: str = payload.get("sub")
+        if user_id is None:
+            raise credentials_exception
+    except JWTError:
+        raise credentials_exception
+    
+    user = db.query(User).filter(User.id == int(user_id)).first()
+    if user is None:
+        raise credentials_exception
+    return user
+
+def get_current_active_user(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    if not current_user.is_active:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user

app/core/security.py

@@ -0,0 +1,30 @@
+import os
+from datetime import datetime, timedelta
+from typing import Any, Union
+from jose import jwt
+from passlib.context import CryptContext
+
+SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-change-in-production")
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 30
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+def create_access_token(
+    subject: Union[str, Any], expires_delta: timedelta = None
+) -> str:
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode = {"exp": expire, "sub": str(subject)}
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return pwd_context.verify(plain_password, hashed_password)
+
+def get_password_hash(password: str) -> str:
+    return pwd_context.hash(password)

app/db/__init__.py

@@ -0,0 +1 @@
+# Database modules

app/db/base.py

@@ -0,0 +1,3 @@
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()

app/db/session.py

@@ -0,0 +1,26 @@
+from pathlib import Path
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from app.db.base import Base
+
+DB_DIR = Path("/app/storage/db")
+DB_DIR.mkdir(parents=True, exist_ok=True)
+
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
+
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+def create_tables():
+    Base.metadata.create_all(bind=engine)

app/models/__init__.py

@@ -0,0 +1,5 @@
+from .user import User
+from .task import Task, TaskStatus, TaskPriority
+from .category import Category
+
+__all__ = ["User", "Task", "TaskStatus", "TaskPriority", "Category"]

app/models/category.py

@@ -0,0 +1,18 @@
+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.db.base import Base
+
+class Category(Base):
+    __tablename__ = "categories"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, nullable=False)
+    description = Column(String, nullable=True)
+    color = Column(String, nullable=True)
+    owner_id = Column(Integer, ForeignKey("users.id"))
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    owner = relationship("User", back_populates="categories")
+    tasks = relationship("Task", back_populates="category")

app/models/task.py

@@ -0,0 +1,35 @@
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, Enum
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from enum import Enum as PyEnum
+from app.db.base import Base
+
+class TaskStatus(PyEnum):
+    PENDING = "pending"
+    IN_PROGRESS = "in_progress"
+    COMPLETED = "completed"
+    CANCELLED = "cancelled"
+
+class TaskPriority(PyEnum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+    URGENT = "urgent"
+
+class Task(Base):
+    __tablename__ = "tasks"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, nullable=False, index=True)
+    description = Column(Text, nullable=True)
+    status = Column(Enum(TaskStatus), default=TaskStatus.PENDING)
+    priority = Column(Enum(TaskPriority), default=TaskPriority.MEDIUM)
+    due_date = Column(DateTime(timezone=True), nullable=True)
+    completed_at = Column(DateTime(timezone=True), nullable=True)
+    owner_id = Column(Integer, ForeignKey("users.id"))
+    category_id = Column(Integer, ForeignKey("categories.id"), nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    owner = relationship("User", back_populates="tasks")
+    category = relationship("Category", back_populates="tasks")

app/models/user.py

@@ -0,0 +1,18 @@
+from sqlalchemy import Column, Integer, String, DateTime, Boolean
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.db.base import Base
+
+class User(Base):
+    __tablename__ = "users"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=True, index=True, nullable=False)
+    hashed_password = Column(String, nullable=False)
+    full_name = Column(String, nullable=True)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    tasks = relationship("Task", back_populates="owner")
+    categories = relationship("Category", back_populates="owner")

app/schemas/__init__.py

@@ -0,0 +1,9 @@
+from .user import User, UserCreate, UserUpdate, Token
+from .task import Task, TaskCreate, TaskUpdate
+from .category import Category, CategoryCreate, CategoryUpdate
+
+__all__ = [
+    "User", "UserCreate", "UserUpdate", "Token",
+    "Task", "TaskCreate", "TaskUpdate",
+    "Category", "CategoryCreate", "CategoryUpdate"
+]

app/schemas/category.py

@@ -0,0 +1,28 @@
+from typing import Optional
+from pydantic import BaseModel
+from datetime import datetime
+
+class CategoryBase(BaseModel):
+    name: str
+    description: Optional[str] = None
+    color: Optional[str] = None
+
+class CategoryCreate(CategoryBase):
+    pass
+
+class CategoryUpdate(BaseModel):
+    name: Optional[str] = None
+    description: Optional[str] = None
+    color: Optional[str] = None
+
+class CategoryInDBBase(CategoryBase):
+    id: int
+    owner_id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+class Category(CategoryInDBBase):
+    pass

app/schemas/task.py

@@ -0,0 +1,36 @@
+from typing import Optional
+from pydantic import BaseModel
+from datetime import datetime
+from app.models.task import TaskStatus, TaskPriority
+
+class TaskBase(BaseModel):
+    title: str
+    description: Optional[str] = None
+    status: TaskStatus = TaskStatus.PENDING
+    priority: TaskPriority = TaskPriority.MEDIUM
+    due_date: Optional[datetime] = None
+    category_id: Optional[int] = None
+
+class TaskCreate(TaskBase):
+    pass
+
+class TaskUpdate(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    status: Optional[TaskStatus] = None
+    priority: Optional[TaskPriority] = None
+    due_date: Optional[datetime] = None
+    category_id: Optional[int] = None
+
+class TaskInDBBase(TaskBase):
+    id: int
+    owner_id: int
+    completed_at: Optional[datetime] = None
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+class Task(TaskInDBBase):
+    pass

app/schemas/user.py

@@ -0,0 +1,38 @@
+from typing import Optional
+from pydantic import BaseModel, EmailStr
+from datetime import datetime
+
+class UserBase(BaseModel):
+    email: EmailStr
+    full_name: Optional[str] = None
+    is_active: bool = True
+
+class UserCreate(UserBase):
+    password: str
+
+class UserUpdate(BaseModel):
+    email: Optional[EmailStr] = None
+    full_name: Optional[str] = None
+    is_active: Optional[bool] = None
+    password: Optional[str] = None
+
+class UserInDBBase(UserBase):
+    id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+class User(UserInDBBase):
+    pass
+
+class UserInDB(UserInDBBase):
+    hashed_password: str
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+class TokenData(BaseModel):
+    user_id: Optional[int] = None

main.py

@@ -0,0 +1,46 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from app.api import auth, tasks, categories
+from app.db.session import create_tables
+
+app = FastAPI(
+    title="Personal Task Management API",
+    description="A comprehensive API for managing personal tasks, categories, and user authentication",
+    version="1.0.0",
+    openapi_url="/openapi.json"
+)
+
+# CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Create database tables
+create_tables()
+
+# Include routers
+app.include_router(auth.router, prefix="/auth", tags=["authentication"])
+app.include_router(tasks.router, prefix="/tasks", tags=["tasks"])
+app.include_router(categories.router, prefix="/categories", tags=["categories"])
+
+@app.get("/")
+def read_root():
+    return {
+        "title": "Personal Task Management API",
+        "description": "A comprehensive API for managing personal tasks and categories",
+        "version": "1.0.0",
+        "documentation": "/docs",
+        "health_check": "/health"
+    }
+
+@app.get("/health")
+def health_check():
+    return {
+        "status": "healthy",
+        "service": "Personal Task Management API",
+        "version": "1.0.0"
+    }

requirements.txt

@@ -0,0 +1,10 @@
+fastapi==0.104.1
+uvicorn[standard]==0.24.0
+sqlalchemy==2.0.23
+alembic==1.13.1
+pydantic==2.5.0
+python-multipart==0.0.6
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+python-decouple==3.8
+ruff==0.1.6