67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
# backend/app/core/auth.py
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from datetime import datetime, timedelta, timezone
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from typing import Optional
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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import jwt
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from jwt.exceptions import PyJWTError
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from .config import SECRET_KEY, ALGORITHM
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/token")
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oauth2_scheme_optional = OAuth2PasswordBearer(tokenUrl="auth/token", auto_error=False)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
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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, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_authenticated_user(token: str = Depends(oauth2_scheme)):
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"""Allows both Admins and Refs"""
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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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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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role = payload.get("role")
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if role not in ["admin", "ref"]:
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raise credentials_exception
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return payload
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except PyJWTError:
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raise credentials_exception
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async def get_admin_user(token: str = Depends(oauth2_scheme)):
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"""Strictly allows ONLY Admins"""
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user = await get_authenticated_user(token)
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if user.get("role") != "admin":
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN, detail="Admin privileges required"
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)
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return user
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async def get_optional_user(
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token: Optional[str] = Depends(oauth2_scheme_optional),
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) -> Optional[dict]:
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"""Returns user payload if valid token exists, else None"""
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if not token:
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return None
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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if payload.get("role") in ["admin", "ref"]:
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return payload
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except Exception:
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pass
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return None
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