
import json
from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync

class chatconsumer(WebsocketConsumer):
    def connect(self):
        self.room_name=self.scope['url_route']['kwargs']['room_name']
        self.room_group_name='chat_%s' % self.room_name

        # Join room group
        async_to_sync(self.channel_layer.group_add)(  
            self.room_group_name,
            self.channel_name
        )

        self.accept()   #reject when not authorized

    def disconnect(self, close_code):
        async_to_sync(self.channel_layer.group_discard)(
            self.room_group_name,
            self.channel_name
        )
# Receive message from WebSocket
    def receive(self, text_data):
        text_data_json = json.loads(text_data)
        message = text_data_json['message']
        

        # Send message to room group
        async_to_sync(self.channel_layer.group_send)(        #send event to group  (special 'type' key)
            self.room_group_name,
            {
                'type': 'chat_message',
                'message': message

            }
        )

# Receive message from room group
    def chat_message(self, event):
        message=event['message']

        # Send message to WebSocket
        self.send(text_data=json.dumps({
            'message': message
        }))


