Voximplant platform - Transfer inbound phone call to mobile number on choice

Question

I've seen other question for the same problem, but answers are conflicting, and none works for me

I want to transfer incoming call to mobile phone, but not immediately: only IF AND WHEN user send a DTMF 3 on a select State, so I think using AppEvents.CallAlerting is not suitable for my case:

Then I tried the following solutions (fwdState is called from menuState select clicking 3)

function fwdCall(e)
{
    Call.removeEventListener(CallEvents.PlaybackFinished, fwdCall);
    const callerId=Call.callerid();
    const calledId='393333333333';
    call = VoxEngine.callPSTN(calledId, callerId);
    call.addEventListener(CallEvents.Connected, (e) => {
        VoxEngine.sendMediaBetween(e.call, Call);
    });
    
    call.addEventListener(CallEvents.Failed, VoxEngine.terminate);
    call.addEventListener(CallEvents.Disconnected, VoxEngine.terminate);        
}

function fwdCall2(e)
{
    Call.removeEventListener(CallEvents.PlaybackFinished, fwdCall2);
    const callerId=Call.callerid();
    const calledId='393333333333';
    call = VoxEngine.callPSTN(calledId, callerId,{ followDiversion: true });
    VoxEngine.easyProcess(e.call, call);
    
    call.addEventListener(CallEvents.Failed, VoxEngine.terminate);
    call.addEventListener(CallEvents.Disconnected, VoxEngine.terminate);        
}


const fwdState = new IVRState('callforward', {
        type: 'noinput',
        prompt: {
            play: 'please_wait_while_we_transfer.mp3'
        }
    }, 
    (data) => 
    {
        Call.addEventListener(CallEvents.PlaybackFinished, fwdCall);
    },
    (data) => 
    {
        fwdState.enter(Call);
    }
);

but both with fwdCall and fwdCall2 I get following error:

JS error: Call is not a constructor in /application.js:442:23

So I tested the example proposed on voximplant website HERE

but (after commenting let Call at line 3) I get same error as above.

Which is the right way to do it?

Thanks

Answer 1

Well...

seems both solutions are correct and works..

in fact error is not in these functions but at the beginning of the scenario: in all examples, voximplant uses Call as default variable to designate the call:

Call = e.call

but Call is internally used by their routine, and when need to manage more than 1 call it returns error.

the solution is quite simple, in the first listener, that usually is

VoxEngine.addEventListener(AppEvents.CallAlerting, (e) => {

use call = e.call; instead of Call = e.call;

That's it.