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from enum import IntEnum
import json
from json import JSONDecodeError
from random import randint
import sys
import asyncio
from random import randint
from websockets import connect
from os import environ
from argparse import ArgumentParser
# IPADDR = '127.0.0.1'
# PORT = '30000'
# TOKEN = 'HELLO'
# UUID = 'magic'
# URL = f'ws://{IPADDR}:{PORT}/api?token={TOKEN}&uuid={UUID}'
class AFBT(IntEnum):
REQUEST = 2,
RESPONSE = 3,
ERROR = 4,
EVENT = 5
msgq = {}
def addrequest(msgid, msg):
msgq[msgid] = {'request': msg, 'response': None}
def addresponse(msgid, msg):
if msgid in msgq.keys():
msgq[msgid]['response'] = msg
class AGLBaseService:
api = None
url = None
ip = None
port = None
token = None
uuid = None
def __init__(self, api, ip, port, url=None, token='HELLO', uuid='magic'):
self.api = api
self.url = url
self.ip = ip
self.port = port
self.token = token
self.uuid = uuid
def __await__(self):
return self._async_init().__await__()
async def __aenter__(self):
return self._async_init()
async def _async_init(self):
# setting ping_interval to None because AFB does not support websocket ping
# if set to !None, the library will close the socket after the default timeout
URL = f'ws://{self.ip}:{self.port}/api?token={self.token}&uuid={self.uuid}'
self._conn = connect(close_timeout=0, uri=URL, subprotocols=['x-afb-ws-json1'], ping_interval=None)
self.websocket = await self._conn.__aenter__()
return self
async def __aexit__(self, *args, **kwargs):
await self._conn.__aexit__(*args, **kwargs)
async def close(self):
await self._conn.__aexit__(*sys.exc_info())
async def send(self, message):
await self.websocket.send(message)
async def receive(self):
return await self.websocket.recv()
async def listener(self):
try:
while True:
msg = await self.receive()
print(f"Received {msg}")
try:
data = json.loads(msg)
if isinstance(data, list):
if data[0] == AFBT.RESPONSE and str.isnumeric(data[1]):
msgid = int(data[1])
if msgid in msgq:
addresponse(msgid, data)
except JSONDecodeError:
print("Not decoding a non-json message")
except KeyboardInterrupt:
print("Received keyboard interrupt, exiting")
except asyncio.CancelledError:
print("Websocket listener coroutine stopped")
async def subscribe(self, event):
msgid = randint(0, 999999)
msg = f'["{AFBT.REQUEST}","{msgid}","{self.api}/subscribe",{{"value": "{event}"}}]'
await self.send(msg)
async def unsubscribe(self, event):
verb = 'unsubscribe'
msgid = randint(0, 999999)
msg = f'[2,"{msgid}","{self.api}/{verb}",{{"value": "{event}"}}]'
addrequest(msgid, msg)
await self.send(msg)
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