Added ability to manually check for updates

menu.js

@@ -4,6 +4,7 @@ const electron = require('electron');
 const os = require('os');
 const fs = require('fs-extra');
 const config = require('./config');
+const update = require('./update');
 
 const join = path.join;
 const app = electron.app;
@@ -106,6 +107,11 @@ const helpSubmenu = [{
   click() {
     shell.openExternal(homepageURL);
   }
+}, {
+  label: `Check for Update`,
+  click() {
+    update.manualUpdateCheck();
+  }
 }, {
   type: 'separator'
 }, {

update.js

@@ -24,6 +24,18 @@ function displayAvailableUpdate(latestVersion) {
   return result;
 }
 
+function displayUnavailableUpdate(installedVersion) {
+  // Display unavailable update info-window
+  const result = dialog.showMessageBox({
+    icon: path.join(__dirname, 'static/Icon.png'),
+    title: 'No Update Available',
+    message: 'No update available',
+    detail: 'Version ' + installedVersion + ' is the latest version'
+  });
+  console.log('You are on the latest version', installedVersion);
+  return result;
+}
+
 function getLatestVersion(err, res, data) {
   if (err) {
     console.log('Update error.');
@@ -52,6 +64,19 @@ function response(result) {
   }
 }
 
+function manualUpdateCheck(err, res, data) {
+  // Manually check for updates
+  const latestVersion = getLatestVersion(err, res, data);
+  if (latestVersion === installedVersion) {
+    // No updates available
+    displayUnavailableUpdate(installedVersion);
+  } else {
+    // Set out update notification & get user response
+    const result = displayAvailableUpdate(latestVersion);
+    response(result);
+  }
+}
+
 function autoUpdateCheck(err, res, data) {
   // Automatically check for updates
   const latestVersion = getLatestVersion(err, res, data);
@@ -101,3 +126,8 @@ module.exports.autoUpdateCheck = () => {
     get.concat(updateURL, autoUpdateCheck);
   }
 };
+
+module.exports.manualUpdateCheck = () => {
+  // Check for updates manually
+  get.concat(updateURL, manualUpdateCheck);
+};