silphius/app/context/client.js

import {createContext, useContext, useEffect} from 'react';

const context = createContext();

export default context;

export function useClient() {
  return useContext(context);
}

export function usePacket(type, fn, dependencies) {
  const client = useClient();
  useEffect(() => {
    if (!client) {
      return;
    }
    function listener(payload) {
      fn(payload, client);
    }
    client.addPacketListener(type, listener);
    return () => {
      client.removePacketListener(type, listener);
    };
  // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [client, ...dependencies]);
}