def _get_subscriber(self, store, subscriber, role):
"""Get some information about a user/address.
Returns a 2-tuple of (member, email) for the given subscriber. If the
subscriber is is not an ``IAddress`` or ``IUser``, then a 2-tuple of
(None, None) is returned. If the subscriber is not already
subscribed, then (None, email) is returned. If the subscriber is an
``IUser`` and does not have a preferred address, (member, None) is
returned.
"""
member = None
email = None
if IAddress.providedBy(subscriber):
member = store.query(Member).filter(
Member.role == role,
Member.list_id == self._list_id,
Member._address == subscriber).first()
email = subscriber.email
elif IUser.providedBy(subscriber):
if subscriber.preferred_address is None:
raise MissingPreferredAddressError(subscriber)
email = subscriber.preferred_address.email
member = store.query(Member).filter(
Member.role == role,
Member.list_id == self._list_id,
Member._user == subscriber).first()
return member, email
def subscribe(self, store, subscriber, role=MemberRole.member):
"""See `IMailingList`."""
if IAddress.providedBy(subscriber):
member = store.query(Member).filter(
Member.role == role, Member.list_id == self._list_id,
Member._address == subscriber).first()
if member:
raise AlreadySubscribedError(self.fqdn_listname,
subscriber.email, role)
elif IUser.providedBy(subscriber):
if subscriber.preferred_address is None:
raise MissingPreferredAddressError(subscriber)
member = store.query(Member).filter(
Member.role == role, Member.list_id == self._list_id,
Member._user == subscriber).first()
if member:
raise AlreadySubscribedError(
self.fqdn_listname, subscriber.preferred_address.email,
role)
else:
raise ValueError('subscriber must be an address or user')
member = Member(role=role,
list_id=self._list_id,
subscriber=subscriber)
member.preferences = Preferences()
store.add(member)
notify(SubscriptionEvent(self, member))
return member