chromeextensions/skia-trooper/background.js

// Copyright (c) 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

function updateIcon() {
  var xmlHttp = new XMLHttpRequest();
  xmlHttp.open("GET", "https://promalerts.skia.org/api/v1/alerts/groups", true);
  xmlHttp.timeout = 5000;
  xmlHttp.onload = function(e) {
    if (xmlHttp.readyState === XMLHttpRequest.DONE && xmlHttp.status === 200) {
      var numActiveInfraAlerts = 0;

      var resp = JSON.parse(xmlHttp.responseText);
      var alertGroups = resp.data;
      alertGroups.forEach(function(alertGroup) {
        if (!alertGroup.blocks) {
          return;
        }
        alertGroup.blocks.forEach(function(block) {
          block.alerts.forEach(function(al) {
            if (al.labels.category != "infra") {
              return;
            }
            if (al.silenced) {
              return;
            }
            numActiveInfraAlerts++;
          });
        });
      });
      chrome.browserAction.setIcon({path:"bell.png"});
      chrome.browserAction.setTitle({title:"Alerts for Skia Troopers"});
      chrome.browserAction.setBadgeText({text: String(numActiveInfraAlerts)});
      if (numActiveInfraAlerts > 0) {
        chrome.browserAction.setBadgeBackgroundColor({color: "red"});
      } else {
        chrome.browserAction.setBadgeBackgroundColor({color: "green"});
      }
    } else {
      console.error("Error talking to alertserver.");
    }
  }
  xmlHttp.onreadystatechange = function() {
    if (xmlHttp.readyState == XMLHttpRequest.DONE) {
      setTimeout(updateIcon, 10000);
    }
  }
  xmlHttp.onerror = function(e) {
    console.error("Error talking to alertserver.");
  }
  xmlHttp.send(null);
}

updateIcon();