未読バッジ表示用のコードを整理

index.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var ipc = require('ipc');
+var remote = require('remote');
 
 var webView = document.getElementById('mainWebview');
 
@@ -14,11 +14,26 @@ var timer = setInterval(function() {
   webView.send('retrieveUnreadCount');
 }, 1000);
 
+var showUnreadBadge = function(unreadCount){
+  switch (process.platform) {
+    case 'win32':
+      var window = remote.getCurrentWindow();
+      if(unreadCount > 0){
+        window.setOverlayIcon(__dirname + '/badge.png', 'You have unread channels.');
+      }
+      else{
+        window.setOverlayIcon(null, '');
+      }
+      break;
+    default:
+  }
+}
+
 webView.addEventListener('ipc-message', function(event){
   switch (event.channel) {
     case 'retrieveUnreadCount':
       var unreadCount = event.args[0];
-      ipc.send('retrieveUnreadCount', unreadCount);
+      showUnreadBadge(unreadCount);
       break;
   }
 });