Added conditional auto answer example

Conditional Autoanswer with Prompt/Conditional Autoanswer.js

@@ -0,0 +1,49 @@
+const xapi = require('xapi');
+
+/*
+
+This macro demonstrates how to have a conditional autoanswer on a system. The macro, upon incoming call, checks whether the remote site is listed in the list of numbers to be auto answered.
+If it finds it, it prompts for a few seconds to allow for either an immediate answer OR to reject the 
+*/
+
+const AUTOANSWER_NUMBERS = ['mynumber@example.com', 'myothernumber@example.com'];
+const AUTOANSWER_DELAY_SECONDS = 10;
+var autoanswerhandler;
+
+
+function normaliseRemoteURI(number){
+  var regex = /^(sip:|h323:|spark:|h320:|webex:|locus:)/gi;
+  number = number.replace(regex, '');
+//  console.log('Normalised Remote URI to ' + number);
+  return number;
+}
+
+function answerCall(){
+  xapi.command('Call Accept').catch(
+      (error) =>{
+        console.error(error);
+      });
+}
+
+xapi.event.on('IncomingCallIndication', (event) => {
+  console.log(event);
+    if(AUTOANSWER_NUMBERS.includes(normaliseRemoteURI(event.RemoteURI))){
+        xapi.command("UserInterface Message Alert Display", {Title: 'Incoming Autoanswer-number', Text: 'This call will automatically be answered after ' + AUTOANSWER_DELAY_SECONDS + ' seconds', Duration: AUTOANSWER_DELAY_SECONDS});
+        autoanswerhandler = setTimeout(() => answerCall(), AUTOANSWER_DELAY_SECONDS * 1000);
+    }
+});
+
+
+xapi.status.on('Call Status', (status) => {
+  if(status === 'Connected'){
+      clearTimeout(autoanswerhandler);
+//      console.log('Call was accepted before auto-answer was performed');
+      xapi.command("UserInterface Message Alert Clear");
+  }
+});
+
+xapi.event.on('CallDisconnect', (event) => {
+      clearTimeout(autoanswerhandler);
+//      console.log('Call was disconnected before auto-answer was performed');
+      xapi.command("UserInterface Message Alert Clear");
+});