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140 lines
4.5 KiB
Python
140 lines
4.5 KiB
Python
from datetime import datetime, timedelta, timezone
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from typing import Annotated
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from fastapi import Request
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from fastapi import Depends, HTTPException, status, Security
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from fastapi.security import OAuth2PasswordBearer
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from sqlalchemy.orm import Session
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from functools import wraps
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from apps.users.crud import get_user_by_email
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from apps.users.roles import Permission, role_permissions
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from apps.users.schemas import TokenData, User, UserInDB
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from middleware.db_connection import get_db
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from settings import config
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ALGORITHM = "HS256"
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fake_users_db = {
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"johndoe": {
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"username": "johndoe",
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"full_name": "John Doe",
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"email": "johndoe@example.com",
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"hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
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"disabled": False,
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}
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}
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
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def verify_password(plain_password, hashed_password):
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return pwd_context.hash(password)
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def get_user(db, username: str):
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if username in db:
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user_dict = db[username]
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return UserInDB(**user_dict)
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def authenticate_user(db, username: str, password: str):
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user = get_user_by_email(db, username)
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if not user:
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return False
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if not verify_password(password, user.hashed_password):
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return False
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return user
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def create_access_token(data: dict, expires_delta: timedelta | None = 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, config.SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)], db: Session = Depends(get_db)):
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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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print(token)
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payload = jwt.decode(token, config.SECRET_KEY, algorithms=[ALGORITHM])
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print("payload", payload)
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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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token_data = TokenData(username=username)
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except JWTError:
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raise credentials_exception
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print(token_data.username)
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user = get_user_by_email(db, email=token_data.username)
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print(user)
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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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async def get_current_active_user(
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current_user: Annotated[User, Depends(get_current_user)]
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):
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if not current_user.is_active:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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def permission_required(permission: Permission):
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def decorator(func):
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@wraps(func)
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async def decorated_function(*args, **kwargs):
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print("test", kwargs)
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request: Request = kwargs.get("request")
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db: Session = kwargs.get("db")
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if not request:
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail="Missing request object",
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)
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# Get the authorization header
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authorization_header = request.headers.get("Authorization")
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# Extract the token from the authorization header
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if not authorization_header:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Missing authorization header",
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)
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# Assuming the token is in the format "Bearer <token>"
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token = authorization_header.split(" ")[1]
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current_user = await get_current_user(token=token, db=db)
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# Check if the user has the required permission
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if permission not in role_permissions[current_user.role]:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="You do not have the required permission",
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)
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# Call the decorated function with the original arguments
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return await func(*args, **kwargs)
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return decorated_function
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return decorator
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