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#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#  
#    http://www.apache.org/licenses/LICENSE-2.0
#    
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# User authenticator implementation
from time import strftime
from util import *

# Convert a particular user id to an authentication id
def authnid(id):
    return append(append(('authn',), id), ('user.authn',))

# Get a user's authentication
def get(id, cache):
    authn = cache.get(authnid(id))
    if isNil(authn) or authn is None:
        return None
    return authn

# Update a user's authentication
def put(id, authn, cache):
    return cache.put(authnid(id), authn)

# Delete a user's authentication
def delete(id, cache):
    return cache.delete(authnid(id))