helper.py

from jose import JWTError, jwt
from datetime import datetime, timedelta, timezone

from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer


from dotenv import load_dotenv
import os


load_dotenv()
SECRET_KEY = os.getenv("SECRET_KEY")
ALGORITHM = os.getenv("ALGORITHM")
ACCESS_TOKEN_EXPIRE_MINUTES = os.getenv("ACCESS_TOKEN_EXPIRE_MINUTES")

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/login")


token_blacklist = set()





def create_access_token(data: dict, expires_delta: timedelta = timedelta(minutes=30)):
    to_encode = data.copy()
    expire = datetime.now(tz=timezone.utc) + expires_delta
    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
    return encoded_jwt




def get_current_user(token: str = Depends(oauth2_scheme)):
    if token in token_blacklist:
        raise HTTPException(status_code=401, detail="Token has been revoked")
    try:
        # Token doğrula
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        user_id: int = payload.get("user_id")
        username: str = payload.get("username")
        role: str = payload.get("role")
        if user_id is None or username is None:
            raise HTTPException(status_code=401, detail="Invalid token payload")
        return {"user_id": user_id, "username": username, "role": role}
    except JWTError:
        raise HTTPException(status_code=401, detail="Invalid or expired token")
    

def admin_required(current_user: dict = Depends(get_current_user)):
    if current_user["role"] != 1:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="You do not have permission to perform this action"
        )
    return current_user