def _generate_annotation_event(session, request, message, resource):
"""
Get message about annotation event `message` to be sent to `socket`.
Inspects the embedded annotation event and decides whether or not the
passed socket should receive notification of the event.
Returns None if the socket should not receive any message about this
annotation event, otherwise a dict containing information about the event.
"""
if message["action"] == "delete":
payload = {"id": message["annotation_id"]}
else:
user_service = request.find_service(name="user")
formatters = [AnnotationUserInfoFormatter(session, user_service)]
payload = presenters.AnnotationJSONPresenter(
resource, formatters=formatters).asdict()
return {
"type": "annotation-notification",
"options": {
"action": message["action"]
},
"payload": [payload],
}
def handle_annotation_event(message, sockets, settings, session):
id_ = message["annotation_id"]
annotation = storage.fetch_annotation(session, id_)
if annotation is None:
log.warning("received annotation event for missing annotation: %s",
id_)
return
# Find connected clients which are interested in this annotation.
matching_sockets = SocketFilter.matching(sockets, annotation)
try:
# Check to see if the generator has any items
first_socket = next(matching_sockets)
except StopIteration:
# Nothing matched
return
# Create a generator which has the first socket back again
matching_sockets = chain((first_socket, ), matching_sockets)
nipsa_service = NipsaService(session)
user_nipsad = nipsa_service.is_flagged(annotation.userid)
authority = settings.get("h.authority", "localhost")
group_service = GroupfinderService(session, authority)
user_service = UserService(authority, session)
formatters = [AnnotationUserInfoFormatter(session, user_service)]
for socket in matching_sockets:
reply = _generate_annotation_event(message, socket, annotation,
user_nipsad, group_service,
formatters)
if reply is None:
continue
socket.send_json(reply)
def handle_annotation_event(message, sockets, settings, session):
id_ = message["annotation_id"]
annotation = storage.fetch_annotation(session, id_)
if annotation is None:
log.warning("received annotation event for missing annotation: %s",
id_)
return
nipsa_service = NipsaService(session)
user_nipsad = nipsa_service.is_flagged(annotation.userid)
authority = text_type(settings.get("h.authority", "localhost"))
group_service = GroupfinderService(session, authority)
user_service = UserService(authority, session)
formatters = [AnnotationUserInfoFormatter(session, user_service)]
for socket in sockets:
reply = _generate_annotation_event(message, socket, annotation,
user_nipsad, group_service,
formatters)
if reply is None:
continue
socket.send_json(reply)