linmihigo
c086f64363
- Add 7 core API endpoints: users, transactions, partners, products, inventory, payments, credit - Implement role-based authentication (admin/write/read-only access) - Add comprehensive database models with proper relationships - Include full test coverage for all endpoints and business logic - Set up Alembic migrations and Docker configuration - Configure FastAPI app with CORS and database integration
141 lines
4.7 KiB
Python
141 lines
4.7 KiB
Python
"""
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Authentication utilities for JWT-based session management with role-based expiration times.
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"""
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from datetime import datetime, timedelta, timezone
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from typing import Optional, Union
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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from sqlmodel import Session, select
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from app.core.config import settings
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from app.core.db import get_session
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from app.schemas.models import User
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from app.schemas.schemas import TokenData, UserResponse
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from app.schemas.base import UserRole
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# Password hashing
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# Security scheme
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security = HTTPBearer()
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a plain password against its hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""Generate password hash."""
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return pwd_context.hash(password)
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def authenticate_user(
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session: Session,
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username: str,
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password: str
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) -> Optional[User]:
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"""Authenticate user with username and password."""
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statement = select(User).where(User.username == username)
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user = session.exec(statement).first()
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if not user:
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return None
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if not verify_password(password, user.password_hash):
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return None
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return user
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def get_token_expiration_minutes(role: UserRole) -> int:
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"""Get token expiration time based on user role."""
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role_expiration_map = {
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UserRole.ADMIN: settings.admin_token_expire_minutes,
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UserRole.WRITE: settings.write_token_expire_minutes,
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UserRole.READ_ONLY: settings.read_only_token_expire_minutes,
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}
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return role_expiration_map.get(role, settings.read_only_token_expire_minutes)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
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"""Create JWT access token."""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.now(timezone.utc) + expires_delta
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else:
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expire = datetime.now(timezone.utc) + timedelta(minutes=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, settings.secret_key, algorithm=settings.algorithm)
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return encoded_jwt
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def verify_token(credentials: HTTPAuthorizationCredentials = Depends(security)) -> TokenData:
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"""Verify JWT token and extract token data."""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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token = credentials.credentials
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payload = jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
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username: Optional[str] = payload.get("sub")
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user_id: Optional[int] = payload.get("user_id")
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role: Optional[str] = payload.get("role")
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if username is None or user_id is None or role is None:
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raise credentials_exception
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token_data = TokenData(
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username=username,
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user_id=user_id,
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role=UserRole(role)
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)
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except JWTError:
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raise credentials_exception
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return token_data
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def get_current_user(
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token_data: TokenData = Depends(verify_token),
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session: Session = Depends(get_session)
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) -> User:
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"""Get current user from token."""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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user = session.get(User, token_data.user_id)
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if user is None:
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raise credentials_exception
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return user
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def get_current_active_user(
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current_user: UserResponse = Depends(get_current_user)
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) -> UserResponse:
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"""Get current active user (extend this if you add user activation status)."""
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return current_user
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def require_role(required_roles: list[UserRole]):
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"""Dependency factory for role-based access control."""
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def role_checker(current_user: User = Depends(get_current_active_user)) -> User:
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if current_user.role not in required_roles:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Operation not permitted for your role"
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)
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return current_user
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return role_checker
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# Common role dependencies
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require_admin = require_role([UserRole.ADMIN])
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require_write_access = require_role([UserRole.ADMIN, UserRole.WRITE])
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require_any_access = require_role([UserRole.ADMIN, UserRole.WRITE, UserRole.READ_ONLY])
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