Setup FastAPI user authentication service with JWT tokens and SQLite database

README.md

@@ -1,3 +1,135 @@
-# FastAPI Application
+# User Authentication Service
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A FastAPI-based user authentication service with JWT token authentication, SQLite database, and full user management capabilities.
+
+## Features
+
+- User registration and login
+- JWT token-based authentication
+- User profile management (read, update)
+- Role-based access control (normal users vs. superusers)
+- Email and username validation
+- Password hashing with bcrypt
+- SQLite database with SQLAlchemy ORM
+- Database migrations with Alembic
+- OpenAPI documentation
+
+## Project Structure
+
+```
+├── app/                     # Application package
+│   ├── api/                 # API endpoints
+│   │   ├── deps.py          # API dependencies
+│   │   └── v1/              # API v1 endpoints
+│   │       ├── endpoints/   # API endpoint modules
+│   │       │   ├── auth.py  # Authentication endpoints
+│   │       │   └── users.py # User endpoints
+│   │       └── api.py       # API router
+│   ├── core/                # Core modules
+│   │   ├── config.py        # Application settings
+│   │   └── security.py      # Security utilities
+│   ├── crud/                # CRUD operations
+│   │   ├── base.py          # Base CRUD class
+│   │   └── crud_user.py     # User CRUD operations
+│   ├── db/                  # Database setup
+│   │   ├── base.py          # Import all models
+│   │   ├── base_class.py    # Base model class
+│   │   └── session.py       # Database session
+│   ├── models/              # SQLAlchemy models
+│   │   └── user.py          # User model
+│   └── schemas/             # Pydantic schemas
+│       ├── token.py         # Token schemas
+│       └── user.py          # User schemas
+├── migrations/              # Alembic migrations
+│   ├── versions/            # Migration versions
+│   ├── env.py               # Alembic environment
+│   ├── README               # Migrations README
+│   └── script.py.mako       # Migration script template
+├── alembic.ini              # Alembic configuration
+├── main.py                  # Application entry point
+└── requirements.txt         # Project dependencies
+```
+
+## Requirements
+
+- Python 3.8+
+- Dependencies listed in requirements.txt
+
+## Installation
+
+1. Clone the repository
+2. Install dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+3. Set up environment variables (or create a .env file):
+   ```
+   SECRET_KEY=your-secret-key
+   ACCESS_TOKEN_EXPIRE_MINUTES=30
+   ```
+
+## Database Setup
+
+The application uses SQLite database. The database file will be created at `/app/storage/db/db.sqlite`.
+
+Initialize the database with Alembic:
+
+```bash
+alembic upgrade head
+```
+
+## Running the Application
+
+Start the application with Uvicorn:
+
+```bash
+uvicorn main:app --host 0.0.0.0 --port 8000 --reload
+```
+
+## API Documentation
+
+Once the application is running, you can access:
+
+- Swagger UI: http://localhost:8000/docs
+- ReDoc: http://localhost:8000/redoc
+- OpenAPI JSON: http://localhost:8000/openapi.json
+
+## API Endpoints
+
+### Authentication
+
+- `POST /api/v1/auth/register` - Register a new user
+- `POST /api/v1/auth/login` - Login and get access token
+
+### User Management
+
+- `GET /api/v1/users/me` - Get current user
+- `PUT /api/v1/users/me` - Update current user
+- `GET /api/v1/users/{user_id}` - Get user by ID (current user or superuser only)
+- `GET /api/v1/users/` - List users (superuser only)
+
+### Health Check
+
+- `GET /health` - Check application health
+
+## Environment Variables
+
+| Variable                  | Description                   | Default                   |
+|---------------------------|-------------------------------|---------------------------|
+| SECRET_KEY                | JWT secret key                | "YOUR_SECRET_KEY_CHANGE_THIS" |
+| ACCESS_TOKEN_EXPIRE_MINUTES | Token expiration in minutes  | 30                        |
+| ALGORITHM                 | JWT algorithm                 | "HS256"                   |
+| EMAILS_ENABLED            | Enable email features         | False                     |
+| EMAILS_FROM_NAME          | Sender name for emails        | "User Authentication Service" |
+| EMAILS_FROM_EMAIL         | Sender email                  | "info@example.com"        |
+| SMTP_HOST                 | SMTP host                     | ""                        |
+| SMTP_PORT                 | SMTP port                     | 587                       |
+| SMTP_USER                 | SMTP user                     | ""                        |
+| SMTP_PASSWORD             | SMTP password                 | ""                        |
+
+## Security Considerations
+
+- In production, change the default SECRET_KEY
+- Use HTTPS in production
+- Consider rate limiting for login endpoints
+- Implement additional security measures as needed

alembic.ini

@@ -0,0 +1,102 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# template used to generate migration files
+file_template = %%(year)d%%(month).2d%%(day).2d_%%(hour).2d%%(minute).2d%%(second).2d_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to migrations/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL - Note: Using absolute path
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[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

app/api/deps.py

@@ -0,0 +1,70 @@
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import jwt
+from jose.exceptions import JWTError
+from pydantic import ValidationError
+from sqlalchemy.orm import Session
+
+from app.core.config import settings
+from app.core.security import ALGORITHM
+from app.db.session import get_db
+from app.models.user import User
+from app.schemas.token import TokenPayload
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl=f"{settings.API_V1_STR}/auth/login")
+
+
+def get_current_user(
+    db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)
+) -> User:
+    """
+    Validate and decode the JWT token to get the current user
+    """
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
+        token_data = TokenPayload(**payload)
+        if token_data.sub is None:
+            raise credentials_exception
+        user_id: int = token_data.sub
+    except (JWTError, ValidationError):
+        raise credentials_exception
+
+    user = db.query(User).filter(User.id == user_id).first()
+    if not user:
+        raise credentials_exception
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail="Inactive user"
+        )
+    return user
+
+
+def get_current_active_user(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    """
+    Get the current active user
+    """
+    if not current_user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail="Inactive user"
+        )
+    return current_user
+
+
+def get_current_active_superuser(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    """
+    Get the current active superuser
+    """
+    if not current_user.is_superuser:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail="Not enough permissions"
+        )
+    return current_user

app/api/v1/api.py

@@ -0,0 +1,8 @@
+from fastapi import APIRouter
+
+from app.api.v1.endpoints import auth, users
+
+api_router = APIRouter()
+
+api_router.include_router(auth.router, prefix="/auth", tags=["Authentication"])
+api_router.include_router(users.router, prefix="/users", tags=["Users"])

app/api/v1/endpoints/auth.py

@@ -0,0 +1,75 @@
+from datetime import timedelta
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.orm import Session
+
+from app.api import deps
+from app.core import security
+from app.core.config import settings
+from app.crud import crud_user
+from app.schemas.token import Token
+from app.schemas.user import User, UserCreate
+
+router = APIRouter()
+
+
+@router.post("/register", response_model=User)
+def register(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_in: UserCreate,
+) -> Any:
+    """
+    Register a new user.
+    """
+    # Check if user with this email already exists
+    user = crud_user.user.get_by_email(db, email=user_in.email)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this email already exists",
+        )
+
+    # Check if user with this username already exists
+    user = crud_user.user.get_by_username(db, username=user_in.username)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this username already exists",
+        )
+
+    # Create new user
+    user = crud_user.user.create(db, obj_in=user_in)
+    return user
+
+
+@router.post("/login", response_model=Token)
+def login_access_token(
+    db: Session = Depends(deps.get_db), form_data: OAuth2PasswordRequestForm = Depends()
+) -> Any:
+    """
+    OAuth2 compatible token login, get an access token for future requests.
+    """
+    user = crud_user.user.authenticate(
+        db, email=form_data.username, password=form_data.password
+    )
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password",
+        )
+    if not crud_user.user.is_active(user):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Inactive user",
+        )
+
+    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    return {
+        "access_token": security.create_access_token(
+            user.id, expires_delta=access_token_expires
+        ),
+        "token_type": "bearer",
+    }

app/api/v1/endpoints/users.py

@@ -0,0 +1,92 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Body, Depends, HTTPException, status
+from fastapi.encoders import jsonable_encoder
+from sqlalchemy.orm import Session
+
+from app.api import deps
+from app.crud import crud_user
+from app.models.user import User
+from app.schemas.user import User as UserSchema
+from app.schemas.user import UserUpdate
+
+router = APIRouter()
+
+
+@router.get("/me", response_model=UserSchema)
+def read_user_me(
+    current_user: User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get current user.
+    """
+    return current_user
+
+
+@router.put("/me", response_model=UserSchema)
+def update_user_me(
+    *,
+    db: Session = Depends(deps.get_db),
+    password: str = Body(None),
+    first_name: str = Body(None),
+    last_name: str = Body(None),
+    email: str = Body(None),
+    current_user: User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update current user.
+    """
+    current_user_data = jsonable_encoder(current_user)
+    user_in = UserUpdate(**current_user_data)
+    if password is not None:
+        user_in.password = password
+    if first_name is not None:
+        user_in.first_name = first_name
+    if last_name is not None:
+        user_in.last_name = last_name
+    if email is not None:
+        # Check if email already exists for another user
+        existing_user = crud_user.user.get_by_email(db, email=email)
+        if existing_user and existing_user.id != current_user.id:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Email already registered",
+            )
+        user_in.email = email
+
+    user = crud_user.user.update(db, db_obj=current_user, obj_in=user_in)
+    return user
+
+
+@router.get("/{user_id}", response_model=UserSchema)
+def read_user_by_id(
+    user_id: int,
+    current_user: User = Depends(deps.get_current_active_user),
+    db: Session = Depends(deps.get_db),
+) -> Any:
+    """
+    Get a specific user by id.
+    """
+    user = crud_user.user.get(db, id=user_id)
+    if user == current_user:
+        return user
+    if not crud_user.user.is_superuser(current_user):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Not enough permissions",
+        )
+    return user
+
+
+@router.get("/", response_model=List[UserSchema])
+def read_users(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: User = Depends(deps.get_current_active_superuser),
+) -> Any:
+    """
+    Retrieve users. Only for superusers.
+    """
+    users = crud_user.user.get_multi(db, skip=skip, limit=limit)
+    return users

app/core/config.py

@@ -0,0 +1,42 @@
+from pathlib import Path
+from typing import List
+
+from pydantic import AnyHttpUrl, EmailStr
+from pydantic_settings import BaseSettings
+
+# Get project base directory
+BASE_DIR = Path(__file__).resolve().parent.parent.parent
+
+
+class Settings(BaseSettings):
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "User Authentication Service"
+
+    # SECURITY
+    SECRET_KEY: str = "YOUR_SECRET_KEY_CHANGE_THIS"  # Change in production
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30  # 30 minutes
+    ALGORITHM: str = "HS256"
+
+    # CORS
+    BACKEND_CORS_ORIGINS: List[AnyHttpUrl] = []
+
+    # Database
+    DB_DIR = Path("/app") / "storage" / "db"
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+
+    # Email
+    EMAILS_ENABLED: bool = False
+    EMAILS_FROM_NAME: str = "User Authentication Service"
+    EMAILS_FROM_EMAIL: EmailStr = "info@example.com"
+    SMTP_HOST: str = ""
+    SMTP_PORT: int = 587
+    SMTP_USER: str = ""
+    SMTP_PASSWORD: str = ""
+
+    class Config:
+        case_sensitive = True
+        env_file = BASE_DIR / ".env"
+        env_file_encoding = "utf-8"
+
+
+settings = Settings()

app/core/security.py

@@ -0,0 +1,42 @@
+from datetime import datetime, timedelta
+from typing import Any, Optional, Union
+
+from jose import jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+ALGORITHM = settings.ALGORITHM
+
+
+def create_access_token(
+    subject: Union[str, Any], expires_delta: Optional[timedelta] = None
+) -> str:
+    """
+    Create a JWT access token
+    """
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode = {"exp": expire, "sub": str(subject)}
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """
+    Verify a password against a hash
+    """
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """
+    Hash a password
+    """
+    return pwd_context.hash(password)

app/crud/base.py

@@ -0,0 +1,66 @@
+from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
+
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+from sqlalchemy.orm import Session
+
+from app.db.base_class import Base
+
+ModelType = TypeVar("ModelType", bound=Base)
+CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
+UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
+
+
+class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
+    def __init__(self, model: Type[ModelType]):
+        """
+        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
+
+        **Parameters**
+
+        * `model`: A SQLAlchemy model class
+        * `schema`: A Pydantic model (schema) class
+        """
+        self.model = model
+
+    def get(self, db: Session, id: Any) -> Optional[ModelType]:
+        return db.query(self.model).filter(self.model.id == id).first()
+
+    def get_multi(
+        self, db: Session, *, skip: int = 0, limit: int = 100
+    ) -> List[ModelType]:
+        return db.query(self.model).offset(skip).limit(limit).all()
+
+    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
+        obj_in_data = jsonable_encoder(obj_in)
+        db_obj = self.model(**obj_in_data)
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self,
+        db: Session,
+        *,
+        db_obj: ModelType,
+        obj_in: Union[UpdateSchemaType, Dict[str, Any]],
+    ) -> ModelType:
+        obj_data = jsonable_encoder(db_obj)
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.dict(exclude_unset=True)
+        for field in obj_data:
+            if field in update_data:
+                setattr(db_obj, field, update_data[field])
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def remove(self, db: Session, *, id: int) -> ModelType:
+        obj = db.query(self.model).get(id)
+        db.delete(obj)
+        db.commit()
+        return obj

app/crud/crud_user.py

@@ -0,0 +1,61 @@
+from typing import Any, Dict, Optional, Union
+
+from sqlalchemy.orm import Session
+
+from app.core.security import get_password_hash, verify_password
+from app.crud.base import CRUDBase
+from app.models.user import User
+from app.schemas.user import UserCreate, UserUpdate
+
+
+class CRUDUser(CRUDBase[User, UserCreate, UserUpdate]):
+    def get_by_email(self, db: Session, *, email: str) -> Optional[User]:
+        return db.query(User).filter(User.email == email).first()
+
+    def get_by_username(self, db: Session, *, username: str) -> Optional[User]:
+        return db.query(User).filter(User.username == username).first()
+
+    def create(self, db: Session, *, obj_in: UserCreate) -> User:
+        db_obj = User(
+            email=obj_in.email,
+            username=obj_in.username,
+            hashed_password=get_password_hash(obj_in.password),
+            first_name=obj_in.first_name,
+            last_name=obj_in.last_name,
+            is_active=obj_in.is_active,
+            is_superuser=obj_in.is_superuser,
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self, db: Session, *, db_obj: User, obj_in: Union[UserUpdate, Dict[str, Any]]
+    ) -> User:
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.dict(exclude_unset=True)
+        if update_data.get("password"):
+            hashed_password = get_password_hash(update_data["password"])
+            del update_data["password"]
+            update_data["hashed_password"] = hashed_password
+        return super().update(db, db_obj=db_obj, obj_in=update_data)
+
+    def authenticate(self, db: Session, *, email: str, password: str) -> Optional[User]:
+        user = self.get_by_email(db, email=email)
+        if not user:
+            return None
+        if not verify_password(password, user.hashed_password):
+            return None
+        return user
+
+    def is_active(self, user: User) -> bool:
+        return user.is_active
+
+    def is_superuser(self, user: User) -> bool:
+        return user.is_superuser
+
+
+user = CRUDUser(User)

app/db/base.py

@@ -0,0 +1,3 @@
+# Import all the models here to ensure they are registered with SQLAlchemy's metadata
+from app.db.base_class import Base  # noqa
+from app.models.user import User  # noqa

app/db/base_class.py

@@ -0,0 +1,14 @@
+from typing import Any
+
+from sqlalchemy.ext.declarative import as_declarative, declared_attr
+
+
+@as_declarative()
+class Base:
+    id: Any
+    __name__: str
+
+    # Generate __tablename__ automatically based on class name
+    @declared_attr
+    def __tablename__(cls) -> str:
+        return cls.__name__.lower()

app/db/session.py

@@ -0,0 +1,24 @@
+from pathlib import Path
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+
+# Ensure the database directory exists
+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()

app/models/user.py

@@ -0,0 +1,18 @@
+from datetime import datetime
+
+from sqlalchemy import Boolean, Column, DateTime, Integer, String
+
+from app.db.base_class import Base
+
+
+class User(Base):
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=True, index=True, nullable=False)
+    username = Column(String, unique=True, index=True, nullable=False)
+    hashed_password = Column(String, nullable=False)
+    first_name = Column(String, nullable=True)
+    last_name = Column(String, nullable=True)
+    is_active = Column(Boolean, default=True)
+    is_superuser = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

app/schemas/token.py

@@ -0,0 +1,13 @@
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenPayload(BaseModel):
+    sub: Optional[int] = None
+    exp: Optional[int] = None

app/schemas/user.py

@@ -0,0 +1,51 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, EmailStr, Field, validator
+
+
+# Shared properties
+class UserBase(BaseModel):
+    email: Optional[EmailStr] = None
+    username: Optional[str] = None
+    is_active: Optional[bool] = True
+    is_superuser: Optional[bool] = False
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+
+
+# Properties to receive via API on creation
+class UserCreate(UserBase):
+    email: EmailStr
+    username: str
+    password: str = Field(..., min_length=8)
+
+    @validator("username")
+    def username_alphanumeric(cls, v):
+        assert v.isalnum(), "Username must be alphanumeric"
+        return v
+
+
+# Properties to receive via API on update
+class UserUpdate(UserBase):
+    password: Optional[str] = Field(None, min_length=8)
+
+
+# Database model properties
+class UserInDBBase(UserBase):
+    id: Optional[int] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        orm_mode = True
+
+
+# Additional properties to return via API
+class User(UserInDBBase):
+    pass
+
+
+# Additional properties stored in DB but not returned by API
+class UserInDB(UserInDBBase):
+    hashed_password: str

main.py

@@ -0,0 +1,53 @@
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.openapi.utils import get_openapi
+
+from app.api.v1.api import api_router
+from app.core.config import settings
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    version="0.1.0",
+    description="User Authentication Service API",
+    docs_url="/docs",
+    redoc_url="/redoc",
+    openapi_url="/openapi.json",
+)
+
+# Add CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Include API router
+app.include_router(api_router, prefix=settings.API_V1_STR)
+
+
+# Health check endpoint
+@app.get("/health", tags=["Health"])
+async def health_check():
+    return {"status": "healthy"}
+
+
+def custom_openapi():
+    if app.openapi_schema:
+        return app.openapi_schema
+    openapi_schema = get_openapi(
+        title=app.title,
+        version=app.version,
+        description=app.description,
+        routes=app.routes,
+    )
+    app.openapi_schema = openapi_schema
+    return app.openapi_schema
+
+
+app.openapi = custom_openapi
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/README

@@ -0,0 +1,8 @@
+# Alembic Migrations
+
+This directory contains database migration scripts for the User Authentication Service.
+
+## Usage
+
+1. Run migrations: `alembic upgrade head`
+2. Create new migration: `alembic revision -m "description of changes"`

migrations/env.py

@@ -0,0 +1,81 @@
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+from app.db.base import Base  # noqa
+
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    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:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        # Determine if we're using SQLite and enable batch mode if so
+        is_sqlite = connection.dialect.name == "sqlite"
+
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            render_as_batch=is_sqlite,  # Enable batch mode for SQLite
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/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"}

migrations/versions/20230901_000001_create_user_table.py

@@ -0,0 +1,50 @@
+"""create user table
+
+Revision ID: 20230901_000001
+Revises:
+Create Date: 2023-09-01 00:00:01.000000
+
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "20230901_000001"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Create user table
+    op.create_table(
+        "user",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("email", sa.String(), nullable=False),
+        sa.Column("username", sa.String(), nullable=False),
+        sa.Column("hashed_password", sa.String(), nullable=False),
+        sa.Column("first_name", sa.String(), nullable=True),
+        sa.Column("last_name", sa.String(), nullable=True),
+        sa.Column("is_active", sa.Boolean(), nullable=True, default=True),
+        sa.Column("is_superuser", sa.Boolean(), nullable=True, default=False),
+        sa.Column("created_at", sa.DateTime(), nullable=True),
+        sa.Column("updated_at", sa.DateTime(), nullable=True),
+        sa.PrimaryKeyConstraint("id"),
+    )
+
+    # Create indices for faster lookups
+    op.create_index(op.f("ix_user_email"), "user", ["email"], unique=True)
+    op.create_index(op.f("ix_user_id"), "user", ["id"], unique=False)
+    op.create_index(op.f("ix_user_username"), "user", ["username"], unique=True)
+
+
+def downgrade() -> None:
+    # Drop indices
+    op.drop_index(op.f("ix_user_username"), table_name="user")
+    op.drop_index(op.f("ix_user_id"), table_name="user")
+    op.drop_index(op.f("ix_user_email"), table_name="user")
+
+    # Drop table
+    op.drop_table("user")

requirements.txt

@@ -0,0 +1,12 @@
+fastapi>=0.95.0
+uvicorn>=0.21.1
+sqlalchemy>=2.0.0
+pydantic>=2.0.0
+pydantic-settings>=2.0.0
+python-jose[cryptography]>=3.3.0
+passlib[bcrypt]>=1.7.4
+python-multipart>=0.0.6
+alembic>=1.11.0
+email-validator>=2.0.0
+ruff>=0.0.270
+pathlib>=1.0.1