on{X} rule for POSTing to a url while connected to a specific wifi access point

onx_wifi_post.js

// Initializing variables 

// url to post to. If using ninjablocks this is a webhook you created in the dashboard
var url = "https://api.ninja.is/rest/v0/device/WEBHOOK_0_0_108/subdevice/fIOAY/tickle/xxxxxxxxxxx";
// the wifi SSID
var ssid = "myhomewifi";
// how often to trigger the POST
var seconds = 5*60;
var method = "POST";

// End of variables initializing 

var msg = "Welcome home!";
var timerName = "timer_ws";


function webServiceCall() {
  device.ajax(
    {
      url: url,
      type: method,
      data: ""
    },
    function onSuccess(body, textStatus, response) {
      console.log("Sending " + method + " to " + url + ': DONE');
    },
    function onError(textStatus, response) {
      statusCode = ((typeof response != 'undefined') && (response !== null)) ? response.status : 0;
      device.notifications.createNotification('Error calling url : ', textStatus + ' [' + statusCode + ']').show();
      console.error('Error calling url : ', textStatus, error.statusCode);
    });
}


device.network.on("wifiOn", function (ns) {    
  var now = new Date();
  var hour = now.getHours();
  
  var lastStarted = device.localStorage.getItem('lastStarted') || 0;
  
  var lastStartedDate = new Date(0);
  lastStartedDate.setTime(lastStarted)
  
  var lastStartedSince = (now.valueOf() - lastStarted) / 1000;
  console.log("now", now.toUTCString());
  console.log("lastStartedDate", lastStartedDate.toUTCString());
  console.log("lastStartedSince", lastStartedSince);

  // ns.ssid is quoted
  if (ns.ssid.replace(/"/g,"") != ssid) {
    console.log("won't try to start since not on home network", ns.ssid);
    return;
  }
  
  device.notifications.createNotification(msg).show();
  console.log('invoking wifiOn: ' + msg);
  device.localStorage.setItem('lastStarted', now.valueOf());
  scheduleCalls();
});


function scheduleCalls() {
  device.scheduler.setTimer({
    name: timerName,
    time: 0,
    interval: seconds*1000,
    exact: false },
    function () { webServiceCall(); });
}

device.network.on("wifiOff", function (ns) {    
  if (ns.ssid === null) {
    console.log("out-of-wifi event, null network ");
    device.scheduler.removeTimer(timerName);
    return;
  }
  if (ns.ssid.replace(/"/g,"") != ssid) {
    console.log("out-of-wifi event, not in the home network " + ns.ssid, ns.ssid);
    device.scheduler.removeTimer(timerName);
    return;
  }
  device.notifications.createNotification('triggering out-of-wifi event, leaving the home network').show();
  console.log("leaving the home network " + ns.ssid, ns.ssid);
  device.scheduler.removeTimer(timerName);
});