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"""Methods for interacting with gn-proxy."""
import functools
import json
from urllib.parse import urljoin
from enum import Enum, unique
from typing import Dict, Union
from redis import Redis
import requests
@functools.total_ordering
class OrderedEnum(Enum):
"""A class that ordered Enums in order of position"""
@classmethod
@functools.lru_cache(None)
def _member_list(cls):
return list(cls)
def __lt__(self, other):
if self.__class__ is other.__class__:
member_list = self.__class__._member_list()
return member_list.index(self) < member_list.index(other)
return NotImplemented
@unique
class DataRole(OrderedEnum):
"""Enums for Data Access"""
NO_ACCESS = "no-access"
VIEW = "view"
EDIT = "edit"
@unique
class AdminRole(OrderedEnum):
"""Enums for Admin status"""
NOT_ADMIN = "not-admin"
EDIT_ACCESS = "edit-access"
EDIT_ADMINS = "edit-admins"
def get_user_membership(conn: Redis, user_id: str,
group_id: str) -> Dict:
"""Return a dictionary that indicates whether the `user_id` is a
member or admin of `group_id`.
Args:
- conn: a Redis Connection with the responses decoded.
- user_id: a user's unique id
e.g. '8ad942fe-490d-453e-bd37-56f252e41603'
- group_id: a group's unique id
e.g. '7fa95d07-0e2d-4bc5-b47c-448fdc1260b2'
Returns:
A dict indicating whether the user is an admin or a member of
the group: {"member": True, "admin": False}
"""
results = {"member": False, "admin": False}
for key, value in conn.hgetall('groups').items():
if key == group_id:
group_info = json.loads(value)
if user_id in group_info.get("admins"):
results["admin"] = True
if user_id in group_info.get("members"):
results["member"] = True
break
return results
def get_highest_user_access_role(
resource_id: str,
user_id: str,
gn_proxy_url: str = "http://localhost:8080") -> Dict:
"""Get the highest access roles for a given user
Args:
- resource_id: The unique id of a given resource.
- user_id: The unique id of a given user.
- gn_proxy_url: The URL where gn-proxy is running.
Returns:
A dict indicating the highest access role the user has.
"""
role_mapping: Dict[str, Union[DataRole, AdminRole]] = {}
for data_role, admin_role in zip(DataRole, AdminRole):
role_mapping.update({data_role.value: data_role, })
role_mapping.update({admin_role.value: admin_role, })
access_role = {}
response = requests.get(urljoin(gn_proxy_url,
("available?resource="
f"{resource_id}&user={user_id}")))
for key, value in json.loads(response.content).items():
access_role[key] = max(map(lambda role: role_mapping[role], value))
return access_role
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