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# Interface to external user info resources
import copy
class UserInfo(object):
"""Read only interface to a user info store"""
def __init__(self):
pass
def __call__(self, **kwargs):
pass
class UserInfoDB(UserInfo):
"""Read only interface to a user info store"""
def __init__(self, db=None):
self.db = db
@staticmethod
def filter(userinfo, user_info_claims=None):
"""
Return only those claims that are asked for.
It's a best effort task; if essential claims are not present
no error is flagged.
:param userinfo: A dictionary containing the available user info.
:param user_info_claims: A dictionary specifying the asked for claims
:return: A dictionary of filtered claims.
"""
if user_info_claims is None:
return copy.copy(userinfo)
else:
result = {}
missing = []
optional = []
for key, restr in user_info_claims.items():
try:
result[key] = userinfo[key]
except KeyError:
if restr == {"essential": True}:
missing.append(key)
else:
optional.append(key)
return result
def __call__(self, userid, user_info_claims=None, **kwargs):
try:
return self.filter(self.db[userid], user_info_claims)
except KeyError:
return {}
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