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Simple IVR in JavaScript

About​

This is more or less based on the other examples but was slightly modified to "dial a users extension at any time".

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Example​

simpleivr.js

function on_dtmf(session, type, digits, arg)
{
  if ( saved_digits = session.getVariable("digits") ) {
    session.setVariable("digits", saved_digits + digits.digit);
  } else {
    session.setVariable("digits",digits.digit);
    dtmf = session.getDigits(10, "#", 4000);
    session.setVariable("digits", session.getVariable("digits") + dtmf);
  }
  console_log("in callback got digits: " + session.getVariable("digits") + "\n"); 
  return(false);
}

function startivr(session) {
  var dtmf_digits = "";
  var repeat = 0;
  while (session.ready() && dtmf_digits == "" && repeat < 3) {
    session.streamFile("/usr/local/freeswitch/sounds/ivr/default/mainivr.wav", on_dtmf);
    dtmf_digits = session.getVariable("digits");
    if (session.ready() && dtmf_digits == "") {
      dtmf_digits = session.getVariable("digits");
      if (dtmf_digits == "") {
        repeat++;
      }
    }
  }
  return(dtmf_digits);
}

   
var dtmf = "";
session.answer();
session.setVariable("digits","");
dtmf = startivr(session);
console_log("got total digits: " + dtmf + "\n");

if ( dtmf == "" ) {
  session.hangup();
} else if ( dtmf.length == 1 ) {
  session.execute("execute_extension", dtmf+" XML ivr") 
} else {
  session.execute("execute_extension", dtmf+" XML proxy");
}