def render_tag(self, context, obj, signal, notice_type, kwa, varname):
observer = context['request'].user
content_type = ContentType.objects.get_for_model(obj)
observed = False
if is_observing(observed=obj, observer=observer, signal=signal):
observed = True
result = ''
perm = permission_by_label(obj, 'view')
allowed = observer.is_authenticated() and (
observer.has_perm(perm, obj) or observed # Can stop oserving for closed observed object
)
if allowed:
local_context = copy.copy(context)
local_context.update(kwa)
local_context.update({
"object": obj,
"object_id": obj.pk,
"content_type_id": content_type.pk,
'observer': observer,
"signal": signal,
"notice_type": notice_type,
"observed": observed,
})
result = render_to_string('notification/observe_link.html',
local_context)
if varname:
context[varname] = result
return ''
return result
def observe(observed, observer, notice_type_label, signal="post_save"):
"""
Create a new ObservedItem.
To be used by applications to register a user as an observer for some object.
"""
perm = permission_by_label(observed, 'view')
if not (observer.is_authenticated() and observer.has_perm(perm, observed)):
raise PermissionDenied()
notice_type = NoticeType.objects.get(label=notice_type_label)
observed_item = ObservedItem(
user=observer, observed_object=observed,
notice_type=notice_type, signal=signal
)
observed_item.save()
return observed_item
def send_now(users, label, extra_context=None, on_site=True, sender=None):
"""
Creates a new notice.
This is intended to be how other apps create new notices.
notification.send(user, "friends_invite_sent", {
"spam": "eggs",
"foo": "bar",
)
You can pass in on_site=False to prevent the notice emitted from being
displayed on the site.
"""
sent = {}
if extra_context is None:
extra_context = {}
notice_type = NoticeType.objects.get(label=label)
notice_uid = extra_context.get('notice_uid', None)
current_language = translation.get_language()
current_timezone = timezone.get_current_timezone()
for user in users:
obj = extra_context.get('context_object',
extra_context.get('observed', None))
if obj and not user.has_perm(permission_by_label(obj, 'view'), obj):
continue
if notice_uid:
try:
NoticeUid.objects.get(notice_uid=notice_uid, recipient=user)
continue
except NoticeUid.DoesNotExist:
NoticeUid.objects.create(notice_uid=notice_uid, recipient=user)
# Deprecated
# get user language for user from language store defined in
# NOTIFICATION_LANGUAGE_MODULE setting
try:
language = get_notification_language(user)
except LanguageStoreNotAvailable:
language = None
# Deprecated
result = {'pass': True}
results = should_deliver.send(
sender=Notice,
result=result,
recipient=user,
label=label,
notice_type=notice_type,
extra_context=extra_context,
sender_user=sender
)
if not result['pass']:
continue
if False in [i[1] for i in results]:
continue
results = configure.send(
sender=Notice,
recipient=user,
label=label,
notice_type=notice_type,
extra_context=extra_context,
sender_user=sender
)
configs = [i[1] for i in results if i[1]]
configs.sort(key=lambda x: x.get('order', 0))
# TODO: Let pass config as argument of function, or as item of extra_context???
config = {
'language': language or current_language,
'timezone': current_timezone,
'send': True,
}
for i in configs:
config.update(i)
if not config['send']:
continue
with translation.override(config['language']), timezone.override(config['timezone']):
for (medium_id, backend_label), backend in list(NOTIFICATION_BACKENDS.items()):
if backend.can_send(user, notice_type):
backend.deliver(user, sender, notice_type, extra_context)
delivered.send(
sender=Notice,
recipient=user,
notice_type=notice_type,
extra_context=extra_context,
sender_user=sender,
medium_id=medium_id,
backend_label=backend_label,
backend=backend
)
sent.setdefault(backend_label, 0)
sent[backend_label] += 1
return sent