jwt.py

import os

from datetime import datetime, timedelta
from typing import Optional

from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from jose import JWTError, jwt
from schemas import TokenData

# JWT settings
SECRET_KEY = os.environ.get('SECRET_KEY', 'bf7234b66257ea32f286db2d64de00761b89667a126f25e509a180237aaa54cf')
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="login")


def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
    to_encode = data.copy()
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=10080)
    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
    return encoded_jwt


def verify_token(token: str) -> TokenData:
    credentials_exception = HTTPException(
        status_code=status.HTTP_401_UNAUTHORIZED,
        detail="Could not validate credentials",
        headers={"WWW-Authenticate": "Bearer"},
    )

    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        id: int = payload.get("id")
        name: str = payload.get("name")
        if name is None:
            raise credentials_exception
        token_data = TokenData(name=name, id=id)
    except JWTError:
        raise credentials_exception

    return token_data


async def get_current_user(token: str = Depends(oauth2_scheme)) -> TokenData:
    token_data = verify_token(token=token)
    return token_data