#!/usr/bin/env python

# https://websockets.readthedocs.io/en/stable/intro.html#browser-based-example

# simple slider example with socket server

import asyncio
import json
import websockets

async def receiver(websocket, path):
    try:
        message=await websocket.recv()
        async for message in websocket:
            data = json.loads(message)
            if data["action"] == "slider1":
                print('slider received')
                print(data)
                val=data['value']
                
                msg2browser = json.dumps({"type": "slider1", "value": val})
                await websocket.send(msg2browser)

            else:
                logging.error("unsupported event: %s", data)
    finally:
    	print("error: nothing received")


start_server = websockets.serve(receiver, "localhost", 6789)

asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()