core/services/auth.py

from functools import wraps

import httpx
from starlette.exceptions import HTTPException

from services.logger import root_logger as logger
from settings import ADMIN_SECRET, AUTH_URL


async def request_data(gql, headers=None):
    if headers is None:
        headers = {"Content-Type": "application/json"}
    try:
        async with httpx.AsyncClient() as client:
            response = await client.post(AUTH_URL, json=gql, headers=headers)
            if response.status_code == 200:
                data = response.json()
                errors = data.get("errors")
                if errors:
                    logger.error(f"HTTP Errors: {errors}")
                else:
                    return data
    except Exception as e:
        # Handling and logging exceptions during authentication check
        logger.error(f"request_data error: {e}")
    return None


async def check_auth(req):
    token = req.headers.get("Authorization")
    user_id = ""
    user_roles = []
    if token:
        # Logging the authentication token
        logger.debug(f"{token}")
        query_name = "validate_jwt_token"
        operation = "ValidateToken"
        variables = {"params": {"token_type": "access_token", "token": token}}

        gql = {
            "query": f"query {operation}($params: ValidateJWTTokenInput!)  {{"
            + f"{query_name}(params: $params) {{ is_valid claims }} "
            + "}",
            "variables": variables,
            "operationName": operation,
        }
        data = await request_data(gql)
        if data:
            logger.debug(data)
            user_data = data.get("data", {}).get(query_name, {}).get("claims", {})
            user_id = user_data.get("sub", "")
            user_roles = user_data.get("allowed_roles", [])
    return user_id, user_roles


async def add_user_role(user_id):
    logger.info(f"add author role for user_id: {user_id}")
    query_name = "_update_user"
    operation = "UpdateUserRoles"
    headers = {
        "Content-Type": "application/json",
        "x-authorizer-admin-secret": ADMIN_SECRET,
    }
    variables = {"params": {"roles": "author, reader", "id": user_id}}
    gql = {
        "query": f"mutation {operation}($params: UpdateUserInput!) {{ {query_name}(params: $params) {{ id roles }} }}",
        "variables": variables,
        "operationName": operation,
    }
    data = await request_data(gql, headers)
    if data:
        user_id = data.get("data", {}).get(query_name, {}).get("id")
        return user_id


def login_required(f):
    @wraps(f)
    async def decorated_function(*args, **kwargs):
        info = args[1]
        req = info.context.get("request")
        authorized = await check_auth(req)
        if authorized:
            logger.info(authorized)
            user_id, user_roles = authorized
            if user_id and user_roles:
                logger.info(f" got {user_id} roles: {user_roles}")
                info.context["user_id"] = user_id.strip()
                info.context["roles"] = user_roles
        return await f(*args, **kwargs)

    return decorated_function


def auth_request(f):
    @wraps(f)
    async def decorated_function(*args, **kwargs):
        req = args[0]
        authorized = await check_auth(req)
        if authorized:
            user_id, user_roles = authorized
            if user_id and user_roles:
                logger.info(f" got {user_id} roles: {user_roles}")
                req["user_id"] = user_id.strip()
                req["roles"] = user_roles
            return await f(*args, **kwargs)
        else:
            raise HTTPException(status_code=401, detail="Unauthorized")

    return decorated_function