def getSubscription(self, principal=None):
if principal is None:
principal = getPrincipal().id
try:
return getUtility(ISubscriptions).search(
object = self.context, principal={'any_of': (principal,)},
visibility = None, type = {'any_of': (self.type,)})[0]
except IndexError:
return None
def isSubscribedInParents(self, context=None, principal=None):
if principal is None:
principal = getPrincipal().id
ids = getUtility(IIntIds)
if context is None:
context = self.context
contexts = INotificationsContexts(context).getContexts()
if getUtility(ISubscriptions).search(
object = {'any_of': contexts}, principal={'any_of': (principal,)},
visibility = None, type = {'any_of': (self.type,)}):
return True
return False
def unsubscribe(self, principal=None):
if principal is None:
principal = getPrincipal().id
getUtility(ISubscriptions).removeSubscription(
self.context, principal, self.type)
def subscribe(self, principal=None):
if principal is None:
principal = getPrincipal().id
if not self.isSubscribed(principal):
getUtility(ISubscriptions).add(self.context, self.create(principal))
