Unable to instantiate LightstreamerClient using .new

[arvindavoudi]

Hi,

I encountered an issue while attempting to use the lightstreamer-client JavaScript library in Python via JSPyBridge. In JavaScript, the library can be imported and used as follows:

const { LightstreamerClient } = require('lightstreamer-client'); 
var lsc = new LightstreamerClient("https://push.example.com", "DEFAULT");

To replicate this functionality in Python, I tried the following code using JSPyBridge:

import javascript as js

ls = js.require("lightstreamer-client")

lsc = ls.LightstreamerClient("push.example.com", "DEFAULT") # This won't work
lsc = ls.LightstreamerClient.new("push.example.com", "DEFAULT") # This won't work as well

However, both attempts result in errors.

1. The first attempt ls.LightstreamerClient("push.example.com", "DEFAULT") produces the following error:

☕  JavaScript Error  Call to 'LightstreamerClient' failed:
> lsc = ls.LightstreamerClient("push.example.com", "DEFAULT")
  at <module> (.../testjs.py:4)
> 

... across the bridge ...

  at Pipe.onStreamRead (node:internal/stream_base_commons:190:23)
  at Readable.push (node:internal/streams/readable:390:5)
  at readableAddChunkPushByteMode (node:internal/streams/readable:510:3)
  at addChunk (node:internal/streams/readable:559:12)
  at Socket.emit (node:events:518:28)
  at Socket.<anonymous> (/opt/homebrew/lib/python3.11/site-packages/javascript/js/bridge.js:292:18)
  at Bridge.onMessage (/opt/homebrew/lib/python3.11/site-packages/javascript/js/bridge.js:231:25)
  at Bridge.call (/opt/homebrew/lib/python3.11/site-packages/javascript/js/bridge.js:136:42)
  at Object.z (/opt/homebrew/lib/python3.11/site-packages/javascript/js/node_modules/lightstreamer-client/lightstreamer.js:313:375)
> define("LightstreamerClient","Helpers Global Executor lscC lscE lscD lscAP lscAI lscAO lscAc Inheritance Setter EventDispatcher lscAe EnvironmentStatus IllegalArgumentException Environment LoggerManager IllegalStateException ASSERT lsco lsck ls_sbc BrowserDetection lscAK".split(" "),function(d,f,b,a,c,g,e,p,k,h,l,m,r,n,t,u,q,x,v,A,C,w,H,D,L){function z(b,e){this.C=z;this._callSuperConstructor(z);
🌉 TypeError: this._callSuperConstructor is not a function

2. The second attempt ls.LightstreamerClient.new("push.example.com", "DEFAULT") leads to this error:

☕  JavaScript Error  Call to '' failed:
> lsc = ls.LightstreamerClient.new("push.example.com", "DEFAULT")
  at <module> (.../testjs.py:5)
> 

... across the bridge ...

  at Pipe.onStreamRead (node:internal/stream_base_commons:190:23)
  at Readable.push (node:internal/streams/readable:390:5)
  at readableAddChunkPushByteMode (node:internal/streams/readable:510:3)
  at addChunk (node:internal/streams/readable:559:12)
  at Socket.emit (node:events:518:28)
  at Socket.<anonymous> (/opt/homebrew/lib/python3.11/site-packages/javascript/js/bridge.js:292:18)
  at Bridge.onMessage (/opt/homebrew/lib/python3.11/site-packages/javascript/js/bridge.js:231:25)
  at Bridge.init (/opt/homebrew/lib/python3.11/site-packages/javascript/js/bridge.js:128:68)
  TypeError: this.m[ffid] is not a constructor
> ^
🌉 TypeError: this.m[ffid] is not a constructor

It appears that the bridge is unable to handle the instantiation of LightstreamerClient. Could you please provide guidance or any suggestions on how to correctly instantiate this class in Python?

Thanks.