def send_messages(sender, instance, created, **kwargs):
"""When there is a message in a conversation we need to send it to any subscribed participants."""
message = instance
conversation = message.conversation
topic = 'conversations:message'
for subscription in ChannelSubscription.objects.recent().filter(
user__in=conversation.participants.all()).distinct():
payload = ConversationMessageSerializer(
message, context={
'request': MockRequest(user=subscription.user)
}).data
send_in_channel(subscription.reply_channel, topic, payload)
if created and message.is_thread_reply(
) and subscription.user != message.author:
payload = ConversationMessageSerializer(
message.thread,
context={
'request': MockRequest(user=subscription.user)
}).data
send_in_channel(subscription.reply_channel, topic, payload)
# Send push notification and conversation updates when a message is created, but not when it is modified
if not created:
return
tasks.notify_message_push_subscribers(message)
# Send conversations object to participants after sending a message
# (important for unread_message_count)
# Exclude the author because their seen_up_to status gets updated,
# so they will receive the `send_conversation_update` message
topic = 'conversations:conversation'
# Can be skipped for thread replies, as they don't alter the conversations object
if message.is_thread_reply():
return
for subscription in ChannelSubscription.objects.recent()\
.filter(user__in=conversation.participants.all())\
.exclude(user=message.author).distinct():
participant = conversation.conversationparticipant_set.get(
user=subscription.user)
payload = ConversationSerializer(
participant,
context={
'request': MockRequest(user=subscription.user)
}).data
send_in_channel(subscription.reply_channel, topic, payload)
def send_reaction_update(sender, instance, **kwargs):
reaction = instance
message = reaction.message
conversation = message.conversation
topic = 'conversations:message'
for subscription in ChannelSubscription.objects.recent() \
.filter(user__in=conversation.participants.all()).distinct():
payload = ConversationMessageSerializer(message, context={'request': MockRequest(user=subscription.user)}).data
send_in_channel(subscription.reply_channel, topic, payload)
def send_thread_update(sender, instance, created, **kwargs):
# Update thread object for user after updating their participation
# (important for seen_up_to and unread_message_count)
# Saves a few unnecessary messages if we only send on modify
if created:
return
thread = instance.thread
topic = 'conversations:message'
payload = ConversationMessageSerializer(thread, context={'request': MockRequest(user=instance.user)}).data
for subscription in ChannelSubscription.objects.recent().filter(user=instance.user):
send_in_channel(subscription.reply_channel, topic, payload)
def list(self, request, *args, **kwargs):
queryset = self.get_queryset() \
.exclude(conversation__latest_message_id=None) \
.annotate_unread_message_count() \
.annotate(conversation_latest_message_id=F('conversation__latest_message_id')) \
.select_related(
'conversation',
'conversation__latest_message',
'conversation__target_type',
) \
.prefetch_related(
'conversation__latest_message__reactions',
'conversation__participants',
) \
.order_by('-conversation__latest_message_id')
queryset = self.filter_queryset(queryset)
participations = self.paginate_queryset(queryset)
conversations = [p.conversation for p in participations]
messages = [
c.latest_message for c in conversations
if c.latest_message is not None
]
# Prefetch related objects per target type
pickup_ct = ContentType.objects.get_for_model(PickupDate)
pickup_conversations = [
item for item in conversations if item.target_type == pickup_ct
]
pickups = PickupDate.objects. \
filter(id__in=[c.target_id for c in pickup_conversations]). \
prefetch_related('pickupdatecollector_set', 'feedback_given_by')
applications_ct = ContentType.objects.get_for_model(Application)
application_conversations = [
item for item in conversations
if item.target_type == applications_ct
]
applications = Application.objects. \
filter(id__in=[c.target_id for c in application_conversations]). \
select_related('user')
issues_ct = ContentType.objects.get_for_model(Issue)
issue_conversations = [
item for item in conversations if item.target_type == issues_ct
]
issues = Issue.objects. \
filter(id__in=[c.target_id for c in issue_conversations]). \
prefetch_for_serializer(user=request.user)
# Applicant does not have access to group member profiles, so we attach reduced user profiles
my_applications = [a for a in applications if a.user == request.user]
def get_conversation(application):
return next(c for c in application_conversations
if c.target_id == application.id)
users = get_user_model().objects. \
filter(conversationparticipant__conversation__in=[get_conversation(a) for a in my_applications]). \
exclude(id=request.user.id)
context = self.get_serializer_context()
serializer = self.get_serializer(participations, many=True)
message_serializer = ConversationMessageSerializer(messages,
many=True,
context=context)
pickups_serializer = PickupDateSerializer(pickups,
many=True,
context=context)
application_serializer = ApplicationSerializer(applications,
many=True,
context=context)
issue_serializer = IssueSerializer(issues, many=True, context=context)
user_serializer = UserInfoSerializer(users, many=True, context=context)
meta, _ = ConversationMeta.objects.get_or_create(user=request.user)
meta_serializer = ConversationMetaSerializer(
meta, context=self.get_serializer_context())
return self.get_paginated_response({
'conversations':
serializer.data,
'messages':
message_serializer.data,
'pickups':
pickups_serializer.data,
'applications':
application_serializer.data,
'issues':
issue_serializer.data,
'users_info':
user_serializer.data,
'meta':
meta_serializer.data,
})
