[Zope-PTK] Some methods for the PortalMembership kit

[Morten W. Petersen]

Hi guys,

just thought I'd share some functions I've made for the PortalMembership kit.
These methods lets us use a tree structure like so:

/a/a/a/a/Members
/a/c/d/a/Members

and authenticate from the root, /a, and redirected to their respective home
folders.

Any thoughts or comments?

def get_all_login_managers(self):
	"""Gets all login managers from the sub-tree."""

	splitter = lambda x: x[-1]

	return map(splitter, self.ZopeFind(self,
				obj_metatypes=['Login Manager'],
				search_sub=1))


def get_all_user_objects(self):
	"""Gets all user object from the sub-tree."""

	users = []

	for match in self.ZopeFind(self,
				obj_metatypes=['Login Manager'],
				search_sub=1):

		login_manager_name, login_manager = match[:]

		users.extend(login_manager.getMembers())

	return users


def global_get_user(self, username):
	"""Traverses the entire sub-tree and returns the first user
	with the given username."""

	# This method assumes that there is in fact only one user
	# with the given username.

	filter_function = eval("lambda x: x.getUserName() == '%s'" % username)

	try:

		return filter(filter_function, get_all_user_objects(self))[0]

	except IndexError:

		return None


def global_authenticate_user(self, username, password, REQUEST):
	"""Returns a user object if we can match a username & password."""

	user = global_get_user(self, username)

	if not user:

		return user

	login_manager = user.getParentNode()

	if user and login_manager.UserSource.authenticateUser(
						user, password,
						REQUEST):

		return user

	else:

		return None


def authenticate_and_return_url(self, username, password, REQUEST):
	"""Returns a URL if we can match username and password."""

	user = global_authenticate_user(self, username, password, REQUEST)

	if user:

		return user.getHomeUrl()

	else:

		'login_form?authentication_failed:int=1'

-Morten