How to close a notification window automatically - google-chrome-extension

Question

Hi I am displaying a notification based on the output of a server file.The output of the server file is being checked for a period of 5 min interval.Now what I need is that when the output changes at any instant, notification should be automatically be closed at that moment.What I am trying to convey that if the output of the server file is 0,the notification is being displayed in every 5 min. If the output is 1, then notification will not be shown anymore.The problem of my code is that unless I close the notification manually it won't be closed automatically even if the output is 1. Anyone please help me to close my notification automatically.
here is my background.js
var myNotificationID = null;
var oldChromeVersion = !chrome.runtime;
function getGmailUrl() {
return "http://calpinemate.com/";
}
function isGmailUrl(url) {
return url.indexOf(getGmailUrl()) == 0;
}
chrome.browserAction.onClicked.addListener(function(tab) {
if(!localStorage.username){
chrome.windows.create({url : "userinfo.html",type: "popup", height: 200, width:300 , top :400 , left : 800});
}
else{
chrome.tabs.query({
url: "http://calpinemate.com/*",
currentWindow: true
},
function(tabs) {
if (tabs.length > 0) {
var tab = tabs[0];
console.log("Found (at least one) Gmail tab: " + tab.url);
console.log("Focusing and refreshing count...");
chrome.tabs.update(tab.id, { active: true });
updateIcon();
}
else {
console.log("Could not find Gmail tab. Creating one...");
chrome.tabs.create({ url: getGmailUrl() });
updateIcon();
}
});
}
});
function onInit() {
console.log('onInit');
updateIcon();
if (!oldChromeVersion) {
chrome.alarms.create('watchdog', {periodInMinutes:5});
}
}
function onAlarm(alarm) {
console.log('Got alarm', alarm);
if (alarm && alarm.name == 'watchdog') {
onWatchdog();
}
else {
updateIcon();
}
}
function onWatchdog() {
chrome.alarms.get('refresh', function(alarm) {
if (alarm) {
console.log('Refresh alarm exists. Yay.');
}
else {
console.log('Refresh alarm doesn\'t exist!? ' +
'Refreshing now and rescheduling.');
updateIcon();
}
});
}
if (oldChromeVersion) {
updateIcon();
onInit();
}
else {
chrome.runtime.onInstalled.addListener(onInit);
chrome.alarms.onAlarm.addListener(onAlarm);
}
function updateIcon(){
var urlPrefix = 'http://www.calpinemate.com/employees/attendanceStatus/';
var urlSuffix = '/2';
var req = new XMLHttpRequest();
req.addEventListener("readystatechange", function() {
if (req.readyState == 4) {
if (req.status == 200) {
var item=req.responseText;
if(item==1){
chrome.browserAction.setIcon({path:"calpine_logged_in.png"});
chrome.browserAction.setBadgeBackgroundColor({color:[190, 190, 190, 230]});
chrome.browserAction.setBadgeText({text:""});
chrome.notifications.clear(id1);//this is not working
}
else{
chrome.browserAction.setIcon({path:"calpine_not_logged_in.png"});
chrome.browserAction.setBadgeBackgroundColor({color:[190, 190, 190, 230]});
chrome.browserAction.setBadgeText({text:""});
chrome.notifications.create(
'id1',{
type: 'basic',
iconUrl: '/calpine_not_logged_in.png',
title: 'Warning : Attendance',
message: 'Please mark your Attendance !',
buttons: [{ title: 'Mark',
iconUrl: '/tick.jpg'
},{ title: 'Ignore',
iconUrl: '/cross.jpg'}],
priority: 0},
function(id) { myNotificationID = id;}
);
chrome.notifications.onButtonClicked.addListener(function(notifId, btnIdx) {
if (notifId === myNotificationID) {
if (btnIdx === 0) {
window.open("http://www.calpinemate.com/");
} else if (btnIdx === 1) {
notification.close();
}
}
});
chrome.notifications.onClosed.addListener(function() {
notification.close();
});
}
}
else {
// Handle the error
alert("ERROR: status code " + req.status);
}
}
});
var url = urlPrefix + encodeURIComponent(localStorage.username) + urlSuffix;
req.open("GET", url);
req.send(null);
}

Answer 1

Two possible problems:
You pass an undefined variable named id1 in chrome.notifications.clear(), when you actually mean the string 'id1'.
According to the docs on chrome.notifications.clear() method, the second argument (callback function) is not optional, yet you fail to supply one.
One possible solution:
// Replace that line:
chrome.notifications.clear(id1);//this is not working
// With this line:
chrome.notifications.clear('id1', function(){});//this is working perfectly
// Or with this line:
chrome.notifications.clear(myNotificationID, function(){});//this is working perfectly
BTW, you don't need to provide a notification ID yourself.
You can replace: chrome.notifications.create('id1',...
with: chrome.notifications.create('',...
(and then, of course, use: chrome.notifications.clear(myNotificationID,...)