132 lines
3.9 KiB
Python
132 lines
3.9 KiB
Python
"""Authentication router - login, register, token refresh."""
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from datetime import datetime, timedelta, timezone
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from fastapi import APIRouter, Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordRequestForm
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from pydantic import BaseModel, EmailStr
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from jose import jwt
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from passlib.context import CryptContext
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from app.config import settings
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from app.database import get_db
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from app.dependencies import CurrentUser
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from app.models.user import User
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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router = APIRouter()
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# --- Pydantic schemas ---
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class TokenResponse(BaseModel):
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access_token: str
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token_type: str = "bearer"
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class RegisterRequest(BaseModel):
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username: str
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email: EmailStr
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password: str
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class UserResponse(BaseModel):
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id: int
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username: str
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email: str
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is_active: bool
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created_at: datetime | None = None
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model_config = {"from_attributes": True}
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# --- Helpers ---
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def _create_access_token(data: dict) -> str:
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to_encode = data.copy()
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expire = datetime.now(timezone.utc) + timedelta(
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minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
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)
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a plain password against a hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def hash_password(password: str) -> str:
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"""Hash a password."""
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return pwd_context.hash(password)
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# --- Endpoints ---
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@router.post("/register", response_model=TokenResponse, status_code=status.HTTP_201_CREATED)
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async def register(req: RegisterRequest, db: AsyncSession = Depends(get_db)):
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"""Register a new user and return an access token."""
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# Check if username already exists
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result = await db.execute(select(User).where(User.username == req.username))
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if result.scalar_one_or_none():
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail="Username already registered",
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)
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# Check if email already exists
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result = await db.execute(select(User).where(User.email == req.email))
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if result.scalar_one_or_none():
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raise HTTPException(
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status_code=status.HTTP_409_CONFLICT,
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detail="Email already registered",
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)
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user = User(
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username=req.username,
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email=req.email,
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hashed_password=hash_password(req.password),
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)
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db.add(user)
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await db.commit()
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await db.refresh(user)
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access_token = _create_access_token({"sub": str(user.id)})
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return TokenResponse(access_token=access_token)
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@router.post("/login", response_model=TokenResponse)
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async def login(form: OAuth2PasswordRequestForm = Depends(), db: AsyncSession = Depends(get_db)):
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"""Authenticate user and return an access token.
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Accepts form-encoded credentials (username/password) as expected by
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OAuth2PasswordBearer, so the Swagger UI "Authorize" flow works correctly.
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"""
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result = await db.execute(select(User).where(User.username == form.username))
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user = result.scalar_one_or_none()
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if not user or not verify_password(form.password, user.hashed_password):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or password",
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)
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if not user.is_active:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="User account is inactive",
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)
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access_token = _create_access_token({"sub": str(user.id)})
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return TokenResponse(access_token=access_token)
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@router.get("/me", response_model=UserResponse)
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async def get_current_user(current_user: CurrentUser):
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"""Get current user profile from the JWT token."""
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return current_user
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