Implement User Authentication and Authorization Service

This commit includes:
- User registration and authentication API with JWT
- Password reset functionality
- Role-based access control system
- Database models and migrations with SQLAlchemy and Alembic
- API documentation in README

generated with BackendIM... (backend.im)

.env.example

@@ -0,0 +1,27 @@
+# API settings
+API_V1_STR=/api/v1
+PROJECT_NAME="User Authentication and Authorization Service"
+
+# JWT settings
+SECRET_KEY=YourSecretKeyHere
+ALGORITHM=HS256
+ACCESS_TOKEN_EXPIRE_MINUTES=30
+REFRESH_TOKEN_EXPIRE_MINUTES=10080
+
+# CORS settings
+BACKEND_CORS_ORIGINS=["*"]
+
+# Database settings
+# This is automatically configured in the app
+
+# Password reset settings
+PASSWORD_RESET_TOKEN_EXPIRE_HOURS=24
+
+# Email settings (if you plan to implement email sending)
+SMTP_TLS=True
+SMTP_PORT=587
+SMTP_HOST=smtp.example.com
+SMTP_USER=your_username
+SMTP_PASSWORD=your_password
+EMAILS_FROM_EMAIL=noreply@example.com
+EMAILS_FROM_NAME="User Auth Service"

README.md

@@ -1,3 +1,210 @@
-# FastAPI Application
+# User Authentication and Authorization Service
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A FastAPI service providing user authentication and authorization features including:
+
+- User registration and management
+- JWT authentication
+- Password reset functionality
+- Role-based access control
+
+## Features
+
+- **User Management:**
+  - User registration
+  - User profile management
+  - Email verification (implementation ready)
+
+- **Authentication:**
+  - JWT-based authentication with access and refresh tokens
+  - Secure password hashing with bcrypt
+  - Password reset functionality
+
+- **Authorization:**
+  - Role-based access control
+  - Admin functionality for user management
+  - Fine-grained permission control
+
+## Installation
+
+1. Clone the repository
+2. Install dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+3. Set up environment variables (or create a `.env` file)
+4. Run database migrations:
+   ```bash
+   alembic upgrade head
+   ```
+5. Start the server:
+   ```bash
+   uvicorn main:app --reload
+   ```
+
+## API Documentation
+
+### Authentication Endpoints
+
+#### Register a new user
+```
+POST /users
+```
+Request body:
+```json
+{
+  "email": "user@example.com",
+  "password": "StrongPassword123",
+  "first_name": "John",
+  "last_name": "Doe"
+}
+```
+
+#### Login
+```
+POST /auth/login
+```
+Request body:
+```json
+{
+  "email": "user@example.com",
+  "password": "StrongPassword123"
+}
+```
+Response:
+```json
+{
+  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
+  "refresh_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
+  "token_type": "bearer"
+}
+```
+
+#### Refresh token
+```
+POST /auth/refresh-token
+```
+Request body:
+```json
+{
+  "refresh_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
+}
+```
+
+#### Request password reset
+```
+POST /auth/password-reset
+```
+Request body:
+```json
+{
+  "email": "user@example.com"
+}
+```
+
+#### Reset password
+```
+POST /auth/password-reset/confirm
+```
+Request body:
+```json
+{
+  "token": "reset_token_here",
+  "password": "NewStrongPassword123",
+  "password_confirm": "NewStrongPassword123"
+}
+```
+
+#### Change password
+```
+POST /auth/password-change
+```
+Request body:
+```json
+{
+  "current_password": "StrongPassword123",
+  "new_password": "NewStrongPassword123"
+}
+```
+
+### User Management Endpoints
+
+#### Get current user
+```
+GET /users/me
+```
+
+#### Update current user
+```
+PUT /users/me
+```
+Request body:
+```json
+{
+  "first_name": "John",
+  "last_name": "Smith"
+}
+```
+
+#### Get all users (admin only)
+```
+GET /users
+```
+
+#### Get user by ID (admin only)
+```
+GET /users/{user_id}
+```
+
+#### Update user (admin only)
+```
+PUT /users/{user_id}
+```
+
+#### Delete user (admin only)
+```
+DELETE /users/{user_id}
+```
+
+#### Verify user (admin only)
+```
+POST /users/{user_id}/verify
+```
+
+### Role Management Endpoints
+
+#### Get user roles (admin only)
+```
+GET /users/{user_id}/roles
+```
+
+#### Add role to user (admin only)
+```
+POST /users/{user_id}/roles/{role_id}
+```
+
+#### Remove role from user (admin only)
+```
+DELETE /users/{user_id}/roles/{role_id}
+```
+
+## Security Considerations
+
+- Passwords are hashed using bcrypt
+- JWT tokens with appropriate expiration times
+- Role-based authorization for sensitive operations
+- Input validation using Pydantic models
+
+## Health Check
+
+The service provides a health check endpoint:
+```
+GET /health
+```
+
+## Development
+
+The project follows standard FastAPI practices and uses:
+- SQLAlchemy ORM for database operations
+- Alembic for database migrations
+- Pydantic for data validation
+- JWT for authentication tokens

alembic.ini

@@ -0,0 +1,73 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# timezone to use when rendering the date
+# within the migration file as well as the filename.
+# 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 alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path
+# version_locations = %(here)s/bar %(here)s/bat alembic/versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+# 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

alembic/env.py

@@ -0,0 +1,81 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+from app.core.config import settings
+from app.db.base import Base
+
+# 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 myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+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:
+        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/e2eb9a74d893_initial_migration.py

@@ -0,0 +1,101 @@
+"""Initial migration
+
+Revision ID: e2eb9a74d893
+Revises: 
+Create Date: 2025-05-15
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'e2eb9a74d893'
+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('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(), default=True),
+        sa.Column('is_verified', sa.Boolean(), default=False),
+        sa.Column('created_at', sa.DateTime(), default=sa.func.current_timestamp()),
+        sa.Column('updated_at', sa.DateTime(), default=sa.func.current_timestamp(), onupdate=sa.func.current_timestamp()),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    op.create_index(op.f('ix_user_email'), 'user', ['email'], unique=True)
+    op.create_index(op.f('ix_user_id'), 'user', ['id'], unique=False)
+    
+    # Create role table
+    op.create_table(
+        'role',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(), nullable=False),
+        sa.Column('description', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), default=sa.func.current_timestamp()),
+        sa.Column('updated_at', sa.DateTime(), default=sa.func.current_timestamp(), onupdate=sa.func.current_timestamp()),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    op.create_index(op.f('ix_role_id'), 'role', ['id'], unique=False)
+    op.create_index(op.f('ix_role_name'), 'role', ['name'], unique=True)
+    
+    # Create user_role table
+    op.create_table(
+        'userrole',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('user_id', sa.Integer(), nullable=False),
+        sa.Column('role_id', sa.Integer(), nullable=False),
+        sa.Column('created_at', sa.DateTime(), default=sa.func.current_timestamp()),
+        sa.ForeignKeyConstraint(['role_id'], ['role.id'], ondelete='CASCADE'),
+        sa.ForeignKeyConstraint(['user_id'], ['user.id'], ondelete='CASCADE'),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    
+    # Create password_reset table
+    op.create_table(
+        'passwordreset',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('user_id', sa.Integer(), nullable=False),
+        sa.Column('token', sa.String(), nullable=False),
+        sa.Column('is_used', sa.Integer(), default=0, nullable=False),
+        sa.Column('expires_at', sa.DateTime(), nullable=False),
+        sa.Column('created_at', sa.DateTime(), default=sa.func.current_timestamp()),
+        sa.ForeignKeyConstraint(['user_id'], ['user.id'], ondelete='CASCADE'),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    op.create_index(op.f('ix_passwordreset_id'), 'passwordreset', ['id'], unique=False)
+    op.create_index(op.f('ix_passwordreset_token'), 'passwordreset', ['token'], unique=True)
+    
+    # Insert default roles
+    op.bulk_insert(
+        sa.table(
+            'role',
+            sa.Column('name', sa.String()),
+            sa.Column('description', sa.String())
+        ),
+        [
+            {'name': 'admin', 'description': 'Administrator with full access'},
+            {'name': 'user', 'description': 'Regular user with limited access'},
+        ]
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(op.f('ix_passwordreset_token'), table_name='passwordreset')
+    op.drop_index(op.f('ix_passwordreset_id'), table_name='passwordreset')
+    op.drop_table('passwordreset')
+    op.drop_table('userrole')
+    op.drop_index(op.f('ix_role_name'), table_name='role')
+    op.drop_index(op.f('ix_role_id'), table_name='role')
+    op.drop_table('role')
+    op.drop_index(op.f('ix_user_id'), table_name='user')
+    op.drop_index(op.f('ix_user_email'), table_name='user')
+    op.drop_table('user')

app/core/config.py

@@ -0,0 +1,45 @@
+import os
+from pathlib import Path
+from typing import List, Optional
+
+from pydantic_settings import BaseSettings
+
+class Settings(BaseSettings):
+    # API settings
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "User Authentication and Authorization Service"
+    
+    # JWT settings
+    SECRET_KEY: str = os.getenv("SECRET_KEY", "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7")
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    REFRESH_TOKEN_EXPIRE_MINUTES: int = 10080  # 7 days
+    
+    # CORS settings
+    BACKEND_CORS_ORIGINS: List[str] = ["*"]
+    
+    # Database settings
+    DB_DIR: Path = Path("/app") / "storage" / "db"
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+    
+    # Password reset settings
+    PASSWORD_RESET_TOKEN_EXPIRE_HOURS: int = 24
+    
+    # Email settings (if you plan to implement email sending)
+    SMTP_TLS: bool = True
+    SMTP_PORT: Optional[int] = None
+    SMTP_HOST: Optional[str] = None
+    SMTP_USER: Optional[str] = None
+    SMTP_PASSWORD: Optional[str] = None
+    EMAILS_FROM_EMAIL: Optional[str] = None
+    EMAILS_FROM_NAME: Optional[str] = None
+    
+    class Config:
+        env_file = ".env"
+        case_sensitive = True
+
+# Create the settings object
+settings = Settings()
+
+# Ensure the database directory exists
+settings.DB_DIR.mkdir(parents=True, exist_ok=True)

app/db/base.py

@@ -0,0 +1,7 @@
+# Import all the models, so that Base has them before being
+# imported by Alembic
+from app.db.base_class import Base  # noqa
+from app.models.user import User  # noqa
+from app.models.role import Role  # noqa
+from app.models.user_role import UserRole  # noqa
+from app.models.password_reset import PasswordReset  # 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 +1,21 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from app.core.config import settings
+
+# Create database engine
+engine = create_engine(
+    settings.SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}  # Needed for SQLite
+)
+
+# Create session factory
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Dependency to get DB session
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/dependencies/auth.py

@@ -0,0 +1,89 @@
+from datetime import datetime
+from typing import Generator, Optional
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import JWTError, jwt
+from pydantic import ValidationError
+from sqlalchemy.orm import Session
+
+from app.core.config import settings
+from app.db.session import get_db
+from app.models.user import User
+from app.schemas.token import TokenPayload
+
+oauth2_scheme = OAuth2PasswordBearer(
+    tokenUrl=f"/auth/login"
+)
+
+async def get_current_user(
+    db: Session = Depends(get_db),
+    token: str = Depends(oauth2_scheme)
+) -> User:
+    """
+    Decode JWT token to get 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=[settings.ALGORITHM]
+        )
+        token_data = TokenPayload(**payload)
+        
+        # Check if token is expired
+        if token_data.exp < datetime.utcnow().timestamp():
+            raise credentials_exception
+        
+        # Check if it's an access token
+        if hasattr(token_data, "type") and token_data.type != "refresh":
+            pass  # allow access tokens (no type) and non-refresh tokens
+        else:
+            raise credentials_exception
+            
+    except (JWTError, ValidationError):
+        raise credentials_exception
+    
+    user = db.query(User).filter(User.id == token_data.sub).first()
+    if user is None:
+        raise credentials_exception
+    
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Inactive user"
+        )
+    
+    return user
+
+async def get_current_active_user(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    """
+    Check if the user is active.
+    """
+    if not current_user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Inactive user"
+        )
+    return current_user
+
+def get_current_active_verified_user(
+    current_user: User = Depends(get_current_active_user),
+) -> User:
+    """
+    Check if the user is verified.
+    """
+    if not current_user.is_verified:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Email not verified"
+        )
+    return current_user

app/dependencies/role.py

@@ -0,0 +1,37 @@
+from typing import List
+
+from fastapi import Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app.db.session import get_db
+from app.dependencies.auth import get_current_active_user
+from app.models.user import User
+
+
+def check_user_role(required_roles: List[str]):
+    """
+    Dependency to check if a user has the required role(s).
+    """
+    async def _check_user_role(
+        current_user: User = Depends(get_current_active_user),
+        db: Session = Depends(get_db)
+    ) -> User:
+        # If no roles required, return user
+        if not required_roles:
+            return current_user
+            
+        # Get all user roles
+        user_roles = [role.name for role in current_user.roles]
+        
+        # Check if user has any of the required roles
+        for role in required_roles:
+            if role in user_roles:
+                return current_user
+        
+        # If user doesn't have any required role, raise exception
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="You don't have the required permissions to access this resource"
+        )
+    
+    return _check_user_role

app/models/password_reset.py

@@ -0,0 +1,23 @@
+from datetime import datetime
+from sqlalchemy import Column, DateTime, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from app.db.base_class import Base
+
+
+class PasswordReset(Base):
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("user.id", ondelete="CASCADE"), nullable=False)
+    token = Column(String, unique=True, index=True, nullable=False)
+    is_used = Column(Integer, default=0, nullable=False)  # 0 = not used, 1 = used
+    expires_at = Column(DateTime, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    
+    # Relationships
+    user = relationship("User", back_populates="password_resets")
+    
+    def is_expired(self) -> bool:
+        return datetime.utcnow() > self.expires_at
+    
+    def __repr__(self) -> str:
+        return f"<PasswordReset user_id={self.user_id}>"

app/models/role.py

@@ -0,0 +1,19 @@
+from datetime import datetime
+from sqlalchemy import Column, DateTime, Integer, String
+from sqlalchemy.orm import relationship
+
+from app.db.base_class import Base
+
+
+class Role(Base):
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, unique=True, index=True, nullable=False)
+    description = Column(String, nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    # Relationships
+    users = relationship("User", secondary="userrole", back_populates="roles")
+    
+    def __repr__(self) -> str:
+        return f"<Role {self.name}>"

app/models/user.py

@@ -0,0 +1,31 @@
+from datetime import datetime
+from sqlalchemy import Boolean, Column, DateTime, Integer, String
+from sqlalchemy.orm import relationship
+
+from app.db.base_class import Base
+from app.utils.security import get_password_hash, verify_password
+
+
+class User(Base):
+    id = Column(Integer, primary_key=True, index=True)
+    email = 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_verified = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    # Relationships
+    roles = relationship("Role", secondary="userrole", back_populates="users")
+    password_resets = relationship("PasswordReset", back_populates="user")
+
+    def set_password(self, password: str) -> None:
+        self.hashed_password = get_password_hash(password)
+    
+    def verify_password(self, password: str) -> bool:
+        return verify_password(password, self.hashed_password)
+    
+    def __repr__(self) -> str:
+        return f"<User {self.email}>"

app/models/user_role.py

@@ -0,0 +1,14 @@
+from datetime import datetime
+from sqlalchemy import Column, DateTime, ForeignKey, Integer, Table
+
+from app.db.base_class import Base
+
+# Association table for the many-to-many relationship between users and roles
+class UserRole(Base):
+    id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, ForeignKey("user.id", ondelete="CASCADE"), nullable=False)
+    role_id = Column(Integer, ForeignKey("role.id", ondelete="CASCADE"), nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    
+    def __repr__(self) -> str:
+        return f"<UserRole user_id={self.user_id} role_id={self.role_id}>"

app/routers/auth.py

@@ -0,0 +1,180 @@
+from fastapi import APIRouter, Body, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from jose import JWTError, jwt
+from sqlalchemy.orm import Session
+
+from app.core.config import settings
+from app.db.session import get_db
+from app.dependencies.auth import get_current_active_user
+from app.models.user import User
+from app.schemas.auth import ChangePassword, Login
+from app.schemas.password import PasswordReset, PasswordResetConfirm
+from app.schemas.token import Token, TokenPayload, TokenRefresh
+from app.services.auth import (
+    authenticate_user, 
+    create_tokens_for_user, 
+    generate_password_reset_token, 
+    reset_password, 
+    verify_password_reset_token
+)
+from app.utils.security import verify_password
+
+router = APIRouter()
+
+
+@router.post("/login", response_model=Token)
+def login(
+    db: Session = Depends(get_db),
+    form_data: OAuth2PasswordRequestForm = Depends()
+):
+    """
+    OAuth2 compatible token login, get an access token for future requests.
+    """
+    user = authenticate_user(db, form_data.username, form_data.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password",
+            headers={"WWW-Authenticate": "Bearer"}
+        )
+    
+    tokens = create_tokens_for_user(user.id)
+    return tokens
+
+
+@router.post("/login/access-token", response_model=Token)
+def login_access_token(
+    login_data: Login,
+    db: Session = Depends(get_db)
+):
+    """
+    Get an access token for future requests.
+    """
+    user = authenticate_user(db, login_data.email, login_data.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password",
+            headers={"WWW-Authenticate": "Bearer"}
+        )
+    
+    tokens = create_tokens_for_user(user.id)
+    return tokens
+
+
+@router.post("/refresh-token", response_model=Token)
+def refresh_token(
+    refresh_token_data: TokenRefresh,
+    db: Session = Depends(get_db)
+):
+    """
+    Get a new access token using refresh token.
+    """
+    try:
+        payload = jwt.decode(
+            refresh_token_data.refresh_token, 
+            settings.SECRET_KEY, 
+            algorithms=[settings.ALGORITHM]
+        )
+        token_data = TokenPayload(**payload)
+        
+        # Check if it's a refresh token
+        if not hasattr(token_data, "type") or token_data.type != "refresh":
+            raise HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail="Invalid token type",
+                headers={"WWW-Authenticate": "Bearer"}
+            )
+        
+    except (JWTError, ValueError):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid token",
+            headers={"WWW-Authenticate": "Bearer"}
+        )
+    
+    user = db.query(User).filter(User.id == token_data.sub).first()
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found",
+            headers={"WWW-Authenticate": "Bearer"}
+        )
+    
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Inactive user"
+        )
+    
+    tokens = create_tokens_for_user(user.id)
+    return tokens
+
+
+@router.post("/password-reset", status_code=status.HTTP_200_OK)
+def request_password_reset(
+    password_reset: PasswordReset,
+    db: Session = Depends(get_db)
+):
+    """
+    Request a password reset token.
+    """
+    token = generate_password_reset_token(db, email=password_reset.email)
+    
+    # In a real application, you would send an email with the token
+    # For this example, we'll just return a success message
+    
+    return {
+        "message": "Password reset link has been sent to your email"
+    }
+
+
+@router.post("/password-reset/confirm", status_code=status.HTTP_200_OK)
+def confirm_password_reset(
+    password_reset_confirm: PasswordResetConfirm,
+    db: Session = Depends(get_db)
+):
+    """
+    Reset password using a token.
+    """
+    user = reset_password(
+        db, 
+        token=password_reset_confirm.token, 
+        new_password=password_reset_confirm.password
+    )
+    
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Invalid or expired token"
+        )
+    
+    return {
+        "message": "Password has been reset successfully"
+    }
+
+
+@router.post("/password-change", status_code=status.HTTP_200_OK)
+def change_password(
+    password_change: ChangePassword,
+    current_user: User = Depends(get_current_active_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Change password.
+    """
+    # Verify current password
+    if not verify_password(password_change.current_password, current_user.hashed_password):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Incorrect password"
+        )
+    
+    # Update password
+    current_user.hashed_password = get_password_hash(password_change.new_password)
+    db.add(current_user)
+    db.commit()
+    
+    return {
+        "message": "Password has been changed successfully"
+    }

app/routers/health.py

@@ -0,0 +1,25 @@
+from fastapi import APIRouter, Depends, status
+from sqlalchemy.orm import Session
+
+from app.db.session import get_db
+
+router = APIRouter()
+
+
+@router.get("/health", status_code=status.HTTP_200_OK)
+def health_check(db: Session = Depends(get_db)):
+    """
+    Health check endpoint.
+    """
+    try:
+        # Check database connection
+        db.execute("SELECT 1")
+        return {
+            "status": "ok",
+            "message": "Service is running"
+        }
+    except Exception as e:
+        return {
+            "status": "error",
+            "message": f"Service is experiencing issues: {str(e)}"
+        }

app/routers/users.py

@@ -0,0 +1,225 @@
+from typing import List
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app.db.session import get_db
+from app.dependencies.auth import get_current_active_user
+from app.dependencies.role import check_user_role
+from app.models.user import User
+from app.schemas.role import Role
+from app.schemas.user import User as UserSchema
+from app.schemas.user import UserCreate, UserUpdate
+from app.services.role import assign_role_to_user, remove_role_from_user
+from app.services.user import (
+    create_user, 
+    delete_user, 
+    get_user_by_email, 
+    get_user_by_id, 
+    get_users, 
+    update_user,
+    verify_user
+)
+
+router = APIRouter()
+
+
+@router.post("", response_model=UserSchema, status_code=status.HTTP_201_CREATED)
+def register_user(
+    user_in: UserCreate,
+    db: Session = Depends(get_db)
+):
+    """
+    Register a new user.
+    """
+    # Check if user already exists
+    user = get_user_by_email(db, email=user_in.email)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="User with this email already exists"
+        )
+    
+    # Create user
+    user = create_user(db, user_in=user_in)
+    return user
+
+
+@router.get("", response_model=List[UserSchema])
+def read_users(
+    skip: int = 0,
+    limit: int = 100,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Retrieve users. Only for admins.
+    """
+    users = get_users(db, skip=skip, limit=limit)
+    return users
+
+
+@router.get("/me", response_model=UserSchema)
+def read_user_me(
+    current_user: User = Depends(get_current_active_user)
+):
+    """
+    Get current user.
+    """
+    return current_user
+
+
+@router.put("/me", response_model=UserSchema)
+def update_user_me(
+    user_in: UserUpdate,
+    current_user: User = Depends(get_current_active_user),
+    db: Session = Depends(get_db)
+):
+    """
+    Update current user.
+    """
+    user = update_user(db, user_id=current_user.id, user_in=user_in)
+    return user
+
+
+@router.get("/{user_id}", response_model=UserSchema)
+def read_user(
+    user_id: int,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Get a specific user by ID. Only for admins.
+    """
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    return user
+
+
+@router.put("/{user_id}", response_model=UserSchema)
+def update_user_by_id(
+    user_id: int,
+    user_in: UserUpdate,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Update a user. Only for admins.
+    """
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    
+    user = update_user(db, user_id=user_id, user_in=user_in)
+    return user
+
+
+@router.delete("/{user_id}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_user_by_id(
+    user_id: int,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Delete a user. Only for admins.
+    """
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    
+    result = delete_user(db, user_id=user_id)
+    if not result:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail="Failed to delete user"
+        )
+    
+    return None
+
+
+@router.post("/{user_id}/verify", response_model=UserSchema)
+def verify_user_by_id(
+    user_id: int,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Verify a user. Only for admins.
+    """
+    user = verify_user(db, user_id=user_id)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    
+    return user
+
+
+@router.get("/{user_id}/roles", response_model=List[Role])
+def read_user_roles(
+    user_id: int,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Get a user's roles. Only for admins.
+    """
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    
+    return user.roles
+
+
+@router.post("/{user_id}/roles/{role_id}", status_code=status.HTTP_200_OK)
+def add_role_to_user(
+    user_id: int,
+    role_id: int,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Add a role to a user. Only for admins.
+    """
+    user_role = assign_role_to_user(db, user_id=user_id, role_id=role_id)
+    if not user_role:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Failed to assign role to user"
+        )
+    
+    return {"message": "Role assigned to user successfully"}
+
+
+@router.delete("/{user_id}/roles/{role_id}", status_code=status.HTTP_200_OK)
+def remove_role_from_user_endpoint(
+    user_id: int,
+    role_id: int,
+    current_user: User = Depends(check_user_role(["admin"])),
+    db: Session = Depends(get_db)
+):
+    """
+    Remove a role from a user. Only for admins.
+    """
+    result = remove_role_from_user(db, user_id=user_id, role_id=role_id)
+    if not result:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Failed to remove role from user"
+        )
+    
+    return {"message": "Role removed from user successfully"}

app/schemas/auth.py

@@ -0,0 +1,11 @@
+from pydantic import BaseModel, EmailStr
+
+
+class Login(BaseModel):
+    email: EmailStr
+    password: str
+
+
+class ChangePassword(BaseModel):
+    current_password: str
+    new_password: str

app/schemas/password.py

@@ -0,0 +1,31 @@
+from pydantic import BaseModel, EmailStr, Field, validator
+
+
+class PasswordReset(BaseModel):
+    email: EmailStr
+
+
+class PasswordResetConfirm(BaseModel):
+    token: str
+    password: str = Field(..., min_length=8)
+    password_confirm: str
+    
+    @validator("password")
+    def password_strength(cls, v):
+        """Validate password strength."""
+        if len(v) < 8:
+            raise ValueError("Password must be at least 8 characters long")
+        if not any(char.isdigit() for char in v):
+            raise ValueError("Password must contain at least one digit")
+        if not any(char.isupper() for char in v):
+            raise ValueError("Password must contain at least one uppercase letter")
+        if not any(char.islower() for char in v):
+            raise ValueError("Password must contain at least one lowercase letter")
+        return v
+    
+    @validator("password_confirm")
+    def passwords_match(cls, v, values, **kwargs):
+        """Check that passwords match."""
+        if "password" in values and v != values["password"]:
+            raise ValueError("Passwords do not match")
+        return v

app/schemas/role.py

@@ -0,0 +1,41 @@
+from datetime import datetime
+from typing import List, Optional
+
+from pydantic import BaseModel
+
+
+# Shared properties
+class RoleBase(BaseModel):
+    name: Optional[str] = None
+    description: Optional[str] = None
+
+
+# Properties to receive via API on creation
+class RoleCreate(RoleBase):
+    name: str
+
+
+# Properties to receive via API on update
+class RoleUpdate(RoleBase):
+    pass
+
+
+# Properties shared by models stored in DB
+class RoleInDBBase(RoleBase):
+    id: int
+    name: str
+    created_at: datetime
+    updated_at: datetime
+    
+    class Config:
+        orm_mode = True
+
+
+# Properties to return via API
+class Role(RoleInDBBase):
+    pass
+
+
+# Properties stored in DB
+class RoleInDB(RoleInDBBase):
+    pass

app/schemas/token.py

@@ -0,0 +1,19 @@
+from typing import List, Optional
+
+from pydantic import BaseModel
+
+
+class Token(BaseModel):
+    access_token: str
+    refresh_token: str
+    token_type: str = "bearer"
+
+
+class TokenPayload(BaseModel):
+    sub: Optional[str] = None
+    exp: Optional[int] = None
+    type: Optional[str] = None
+
+
+class TokenRefresh(BaseModel):
+    refresh_token: str

app/schemas/user.py

@@ -0,0 +1,76 @@
+from datetime import datetime
+from typing import List, Optional
+
+from pydantic import BaseModel, EmailStr, Field, validator
+
+
+# Shared properties
+class UserBase(BaseModel):
+    email: Optional[EmailStr] = None
+    is_active: Optional[bool] = True
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+
+
+# Properties to receive via API on creation
+class UserCreate(BaseModel):
+    email: EmailStr
+    password: str = Field(..., min_length=8)
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+    
+    @validator("password")
+    def password_strength(cls, v):
+        """Validate password strength."""
+        if len(v) < 8:
+            raise ValueError("Password must be at least 8 characters long")
+        if not any(char.isdigit() for char in v):
+            raise ValueError("Password must contain at least one digit")
+        if not any(char.isupper() for char in v):
+            raise ValueError("Password must contain at least one uppercase letter")
+        if not any(char.islower() for char in v):
+            raise ValueError("Password must contain at least one lowercase letter")
+        return v
+
+
+# Properties to receive via API on update
+class UserUpdate(UserBase):
+    password: Optional[str] = None
+    
+    @validator("password")
+    def password_strength(cls, v):
+        """Validate password strength if provided."""
+        if v is None:
+            return v
+        if len(v) < 8:
+            raise ValueError("Password must be at least 8 characters long")
+        if not any(char.isdigit() for char in v):
+            raise ValueError("Password must contain at least one digit")
+        if not any(char.isupper() for char in v):
+            raise ValueError("Password must contain at least one uppercase letter")
+        if not any(char.islower() for char in v):
+            raise ValueError("Password must contain at least one lowercase letter")
+        return v
+
+
+# Properties shared by models stored in DB
+class UserInDBBase(UserBase):
+    id: int
+    email: EmailStr
+    is_active: bool
+    is_verified: bool
+    created_at: datetime
+    updated_at: datetime
+    
+    class Config:
+        orm_mode = True
+
+
+# Properties to return via API
+class User(UserInDBBase):
+    pass
+
+
+# Properties stored in DB
+class UserInDB(UserInDBBase):
+    hashed_password: str

app/services/auth.py

@@ -0,0 +1,116 @@
+from datetime import datetime, timedelta
+import secrets
+from typing import Optional
+
+from sqlalchemy.orm import Session
+
+from app.core.config import settings
+from app.models.password_reset import PasswordReset
+from app.models.user import User
+from app.services.user import get_user_by_email, get_user_by_id
+from app.utils.security import create_access_token, create_refresh_token, get_password_hash, verify_password
+
+
+def generate_password_reset_token(db: Session, email: str) -> Optional[str]:
+    """Generate a password reset token for a user."""
+    user = get_user_by_email(db, email=email)
+    if not user:
+        return None
+    
+    # Generate token
+    token = secrets.token_urlsafe(32)
+    expires_at = datetime.utcnow() + timedelta(hours=settings.PASSWORD_RESET_TOKEN_EXPIRE_HOURS)
+    
+    # Create password reset record
+    password_reset = PasswordReset(
+        user_id=user.id,
+        token=token,
+        expires_at=expires_at,
+    )
+    db.add(password_reset)
+    db.commit()
+    
+    return token
+
+
+def verify_password_reset_token(db: Session, token: str) -> Optional[User]:
+    """Verify a password reset token."""
+    password_reset = db.query(PasswordReset).filter(
+        PasswordReset.token == token,
+        PasswordReset.is_used == 0
+    ).first()
+    
+    if not password_reset:
+        return None
+    
+    # Check if token is expired
+    if password_reset.is_expired():
+        return None
+    
+    # Get user
+    user = get_user_by_id(db, user_id=password_reset.user_id)
+    if not user:
+        return None
+    
+    return user
+
+
+def reset_password(db: Session, token: str, new_password: str) -> Optional[User]:
+    """Reset a user's password."""
+    password_reset = db.query(PasswordReset).filter(
+        PasswordReset.token == token,
+        PasswordReset.is_used == 0
+    ).first()
+    
+    if not password_reset:
+        return None
+    
+    # Check if token is expired
+    if password_reset.is_expired():
+        return None
+    
+    # Get user
+    user = get_user_by_id(db, user_id=password_reset.user_id)
+    if not user:
+        return None
+    
+    # Update password
+    user.hashed_password = get_password_hash(new_password)
+    user.updated_at = datetime.utcnow()
+    
+    # Mark token as used
+    password_reset.is_used = 1
+    
+    db.add(user)
+    db.add(password_reset)
+    db.commit()
+    db.refresh(user)
+    
+    return user
+
+
+def authenticate_user(db: Session, email: str, password: str) -> Optional[User]:
+    """Authenticate a user."""
+    user = get_user_by_email(db, email=email)
+    if not user:
+        return None
+    
+    if not user.is_active:
+        return None
+    
+    if not verify_password(password, user.hashed_password):
+        return None
+    
+    return user
+
+
+def create_tokens_for_user(user_id: int) -> dict:
+    """Create JWT tokens for a user."""
+    access_token = create_access_token(subject=user_id)
+    refresh_token = create_refresh_token(subject=user_id)
+    
+    return {
+        "access_token": access_token,
+        "refresh_token": refresh_token,
+        "token_type": "bearer"
+    }

app/services/role.py

@@ -0,0 +1,113 @@
+from typing import List, Optional
+
+from sqlalchemy.orm import Session
+
+from app.models.role import Role
+from app.models.user import User
+from app.models.user_role import UserRole
+from app.schemas.role import RoleCreate, RoleUpdate
+
+
+def get_role_by_id(db: Session, role_id: int) -> Optional[Role]:
+    """Get a role by ID."""
+    return db.query(Role).filter(Role.id == role_id).first()
+
+
+def get_role_by_name(db: Session, name: str) -> Optional[Role]:
+    """Get a role by name."""
+    return db.query(Role).filter(Role.name == name).first()
+
+
+def get_roles(db: Session, skip: int = 0, limit: int = 100) -> List[Role]:
+    """Get all roles."""
+    return db.query(Role).offset(skip).limit(limit).all()
+
+
+def create_role(db: Session, role_in: RoleCreate) -> Role:
+    """Create a new role."""
+    # Check if role already exists
+    role = get_role_by_name(db, name=role_in.name)
+    if role:
+        return None
+    
+    # Create role object
+    db_role = Role(
+        name=role_in.name,
+        description=role_in.description,
+    )
+    db.add(db_role)
+    db.commit()
+    db.refresh(db_role)
+    return db_role
+
+
+def update_role(db: Session, role_id: int, role_in: RoleUpdate) -> Optional[Role]:
+    """Update a role."""
+    role = get_role_by_id(db, role_id=role_id)
+    if not role:
+        return None
+    
+    # Update role fields
+    update_data = role_in.dict(exclude_unset=True)
+    
+    # Update fields
+    for field, value in update_data.items():
+        setattr(role, field, value)
+    
+    db.add(role)
+    db.commit()
+    db.refresh(role)
+    return role
+
+
+def delete_role(db: Session, role_id: int) -> bool:
+    """Delete a role."""
+    role = get_role_by_id(db, role_id=role_id)
+    if not role:
+        return False
+    
+    db.delete(role)
+    db.commit()
+    return True
+
+
+def assign_role_to_user(db: Session, user_id: int, role_id: int) -> Optional[UserRole]:
+    """Assign a role to a user."""
+    # Check if user and role exist
+    user = db.query(User).filter(User.id == user_id).first()
+    role = db.query(Role).filter(Role.id == role_id).first()
+    
+    if not user or not role:
+        return None
+    
+    # Check if user already has the role
+    user_role = db.query(UserRole).filter(
+        UserRole.user_id == user_id,
+        UserRole.role_id == role_id
+    ).first()
+    
+    if user_role:
+        return user_role
+    
+    # Assign role to user
+    db_user_role = UserRole(user_id=user_id, role_id=role_id)
+    db.add(db_user_role)
+    db.commit()
+    db.refresh(db_user_role)
+    return db_user_role
+
+
+def remove_role_from_user(db: Session, user_id: int, role_id: int) -> bool:
+    """Remove a role from a user."""
+    # Check if user has the role
+    user_role = db.query(UserRole).filter(
+        UserRole.user_id == user_id,
+        UserRole.role_id == role_id
+    ).first()
+    
+    if not user_role:
+        return False
+    
+    db.delete(user_role)
+    db.commit()
+    return True

app/services/user.py

@@ -0,0 +1,121 @@
+from datetime import datetime, timedelta
+from typing import List, Optional
+
+from sqlalchemy.orm import Session
+
+from app.core.config import settings
+from app.models.role import Role
+from app.models.user import User
+from app.models.user_role import UserRole
+from app.schemas.user import UserCreate, UserUpdate
+from app.utils.security import get_password_hash, verify_password
+
+
+def get_user_by_id(db: Session, user_id: int) -> Optional[User]:
+    """Get a user by ID."""
+    return db.query(User).filter(User.id == user_id).first()
+
+
+def get_user_by_email(db: Session, email: str) -> Optional[User]:
+    """Get a user by email."""
+    return db.query(User).filter(User.email == email).first()
+
+
+def get_users(db: Session, skip: int = 0, limit: int = 100) -> List[User]:
+    """Get all users."""
+    return db.query(User).offset(skip).limit(limit).all()
+
+
+def create_user(db: Session, user_in: UserCreate) -> User:
+    """Create a new user."""
+    # Check if user already exists
+    user = get_user_by_email(db, email=user_in.email)
+    if user:
+        return None
+
+    # Create user object
+    db_user = User(
+        email=user_in.email,
+        hashed_password=get_password_hash(user_in.password),
+        first_name=user_in.first_name,
+        last_name=user_in.last_name,
+        is_active=True,
+        is_verified=False,  # Default to not verified
+    )
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    
+    # Add default user role
+    default_role = db.query(Role).filter(Role.name == "user").first()
+    if default_role:
+        db_user_role = UserRole(user_id=db_user.id, role_id=default_role.id)
+        db.add(db_user_role)
+        db.commit()
+    
+    return db_user
+
+
+def update_user(db: Session, user_id: int, user_in: UserUpdate) -> Optional[User]:
+    """Update a user."""
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        return None
+    
+    # Update user fields
+    update_data = user_in.dict(exclude_unset=True)
+    
+    # Handle password update separately
+    if "password" in update_data:
+        password = update_data.pop("password")
+        user.hashed_password = get_password_hash(password)
+    
+    # Update other fields
+    for field, value in update_data.items():
+        setattr(user, field, value)
+    
+    user.updated_at = datetime.utcnow()
+    db.add(user)
+    db.commit()
+    db.refresh(user)
+    return user
+
+
+def delete_user(db: Session, user_id: int) -> bool:
+    """Delete a user."""
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        return False
+    
+    db.delete(user)
+    db.commit()
+    return True
+
+
+def verify_user(db: Session, user_id: int) -> Optional[User]:
+    """Mark a user as verified."""
+    user = get_user_by_id(db, user_id=user_id)
+    if not user:
+        return None
+    
+    user.is_verified = True
+    user.updated_at = datetime.utcnow()
+    db.add(user)
+    db.commit()
+    db.refresh(user)
+    return user
+
+
+def authenticate_user(db: Session, email: str, password: str) -> Optional[User]:
+    """Authenticate a user."""
+    user = get_user_by_email(db, email=email)
+    if not user:
+        return None
+    
+    if not user.is_active:
+        return None
+    
+    if not verify_password(password, user.hashed_password):
+        return None
+    
+    return user

app/utils/security.py

@@ -0,0 +1,54 @@
+from datetime import datetime, timedelta
+from typing import Any, Dict, Optional, Union
+
+from jose import jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+# Password hashing
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+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:
+    """Generate password hash."""
+    return pwd_context.hash(password)
+
+# JWT token functions
+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=settings.ALGORITHM)
+    return encoded_jwt
+
+def create_refresh_token(subject: Union[str, Any], expires_delta: Optional[timedelta] = None) -> str:
+    """
+    Create a JWT refresh token.
+    """
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=settings.REFRESH_TOKEN_EXPIRE_MINUTES)
+    
+    to_encode = {"exp": expire, "sub": str(subject), "type": "refresh"}
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
+    return encoded_jwt
+
+def create_password_reset_token(subject: Union[str, Any]) -> str:
+    """
+    Create a password reset token.
+    """
+    expire = datetime.utcnow() + timedelta(hours=settings.PASSWORD_RESET_TOKEN_EXPIRE_HOURS)
+    to_encode = {"exp": expire, "sub": str(subject), "type": "password_reset"}
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
+    return encoded_jwt

main.py

@@ -0,0 +1,28 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.routers import auth, users, health
+
+app = FastAPI(
+    title="User Authentication and Authorization Service",
+    description="API for user registration, login, password reset, and role management with JWT authentication",
+    version="0.1.0",
+)
+
+# CORS Configuration
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # Update this with appropriate origins in production
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Include routers
+app.include_router(auth.router, prefix="/auth", tags=["Authentication"])
+app.include_router(users.router, prefix="/users", tags=["Users"])
+app.include_router(health.router, tags=["Health"])
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

pyproject.toml

@@ -0,0 +1,34 @@
+[tool.ruff]
+# Enable flake8-bugbear (`B`) rules.
+select = ["E", "F", "B", "I", "W"]
+
+# Exclude a variety of commonly ignored directories.
+exclude = [
+    ".git",
+    ".ruff_cache",
+    ".venv",
+    ".env",
+    "venv",
+    "env",
+    "__pypackages__",
+    "dist",
+    "build",
+    "alembic",
+]
+
+# Same as Black.
+line-length = 88
+
+# Allow autofix for all enabled rules (when `--fix`) is provided.
+fixable = ["ALL"]
+unfixable = []
+
+# Allow unused variables when underscore-prefixed.
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+[tool.ruff.mccabe]
+# Unlike Flake8, default to a complexity level of 10.
+max-complexity = 10
+
+[tool.ruff.isort]
+known-third-party = ["fastapi", "pydantic", "sqlalchemy"]

requirements.txt

@@ -0,0 +1,13 @@
+fastapi>=0.104.0
+uvicorn>=0.23.2
+sqlalchemy>=2.0.23
+pydantic>=2.4.2
+pydantic-settings>=2.0.3
+python-jose>=3.3.0
+passlib>=1.7.4
+python-multipart>=0.0.6
+email-validator>=2.0.0
+alembic>=1.12.1
+bcrypt>=4.0.1
+python-dotenv>=1.0.0
+ruff>=0.1.1