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# |
# └── get_user_with_permissions
# ├── get_database
# └── get_current_user
# └── HTTPBearer (security)
from fastapi import Depends, HTTPException, status
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from jwt import decode, InvalidTokenError
from ..core.config.config import settings
from datetime import datetime
async def get_database():
"""
A placeholder function to simulate database access.
In a real application, this would return a database session/connection.
"""
# For now, returns None - implement actual DB connection
try:
yield None
finally:
pass
security = HTTPBearer() ## we will get the header of the http request by using this method
async def get_current_user(credentials: HTTPAuthorizationCredentials = Depends(security)):
"""
A function to get the current user based on the provided token.
this dependency:
- extract the token from the request header
- validate it
- return the user information if valid.
"""
token = credentials.credentials # It returns the raw token value (without Bearer) from the request header.
# Validate token
try:
payload = decode(token, settings.SECRET_KEY, algorithms=[settings.JWT_ALGORITHM])
user_id: str = payload.get("sub")
if user_id is None:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Invalid token"
)
except InvalidTokenError:
raise HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Invalid or expired token"
)
return {"user_id": user_id}
async def get_user_with_permissions(
db = Depends(get_database),
user = Depends(get_current_user)
):
# permissions = await fetch_user_permissions(db, user.id)
# user.permissions = permissions
return user
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