import json
from channels.generic.websocket import AsyncWebsocketConsumer


class ArriveeConsumer(AsyncWebsocketConsumer):
    async def connect(self):
        self.course_id = self.scope['url_route']['kwargs']['course_id']
        self.group_name = f'course_{self.course_id}'
        await self.channel_layer.group_add(
            self.group_name,
            self.channel_name
        )
        await self.accept()

    async def disconnect(self, close_code):
        await self.channel_layer.group_discard(
            self.group_name,
            self.channel_name
        )

    async def receive(self, text_data):
        # Optionnel : traiter les messages entrants
        pass

    async def send_arrivee(self, event):
        await self.send(text_data=json.dumps(event['data']))