from OFS.Folder import Folder
from Products.BTreeFolder2.BTreeFolder2 import BTreeFolder2
from Globals import Persistent, Acquisition

from zope.interface import implements
from interfaces import IUsersManager

from zope.component.factory import Factory
from AccessControl import getSecurityManager

_marker = object()

class UsersManager(Persistent, Folder, Acquisition.Implicit):

    implements(IUsersManager)
    meta_type = 'UsersManager'
    id = 'users'

    def _listUsers(self):
        """ list all users """
        user = getSecurityManager().getUser()
        user = str(user)
        uuid = user
        u = getattr(self, user, _marker)
        if u is _marker and user is not None and user != 'Anonymous User':
            if user.startswith('http'):
                # we have openid user
                uuid = 'openid_'+user.replace('/', '_slash_').replace(':', '_colon_').replace('.', '_dot_')
            from User import User
            uo = User(uuid, user)
            self._setObject(uuid, uo)
        return self.objectValues()

    def getUser(self, uname):
        """ return a user by uname """
        u = getattr(self, uname, _marker)
        if u is _marker:
            # create a userobject if uname == currently logged in user
            user = str(getSecurityManager().getUser())
            if user == uname:
                from User import User
                uo = User(uname)
                self._setObject(uname, uo)
                u = getattr(self, uname)
            else:
                return None
        return u

UsersManagerFactory = Factory(UsersManager)