bornhack-website/src/program/consumers.py

from channels.generic.websockets import JsonWebsocketConsumer

from camps.models import Camp
from .models import EventInstance, Favorite


class ScheduleConsumer(JsonWebsocketConsumer):
    http_user = True

    def connection_groups(self, **kwargs):
        return ['schedule_users']

    def connect(self, message, **kwargs):
        camp_slug = message.http_session['campslug']
        try:
            camp = Camp.objects.get(slug=camp_slug)
            days = list(map(
                lambda day:
                    { 'repr': day.lower.strftime('%A %Y-%m-%d')
                    , 'iso': day.lower.strftime('%Y-%m-%d')
                    , 'day_name': day.lower.strftime('%A')
                    },
                camp.get_days('camp')
            ))
            event_instances_query_set = EventInstance.objects.filter(event__camp=camp)
            event_instances = list(map(lambda x: x.to_json(user=message.user), event_instances_query_set))
            self.send({
                "accept": True,
                "event_instances": event_instances,
                "days": days,
                "action": "init"
            })
        except Camp.DoesNotExist:
            pass

    def raw_receive(self, message, **kwargs):
        content = self.decode_json(message['text'])
        action = content.get('action')
        data = {}

        if action == 'favorite':
            event_instance_id = content.get('event_instance_id')
            event_instance = EventInstance.objects.get(id=event_instance_id)
            Favorite.objects.create(
                user=message.user,
                event_instance=event_instance
            )

        if action == 'unfavorite':
            event_instance_id = content.get('event_instance_id')
            event_instance = EventInstance.objects.get(id=event_instance_id)
            favorite = Favorite.objects.get(event_instance=event_instance, user=message.user)
            favorite.delete()

        self.send(data)

    def disconnect(self, message, **kwargs):
        pass