core/services/auth.py

from functools import wraps
import httpx
import logging
from starlette.exceptions import HTTPException

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

trace_logger = logging.getLogger('_trace')
trace_logger.setLevel(logging.INFO)

httpx_logger = logging.getLogger('httpx')
httpx_logger.setLevel(logging.INFO)


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:
            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