Implement update checking

.node-version

@@ -1 +1 @@
-7.9.0
+12.0.0

app/config.js

@@ -11,6 +11,7 @@ const VIEWS_BASE_URI = `file://${__dirname}/static`
 module.exports = {
   REPO: {
     URL: 'https://github.com/HR/Crypter/',
+    RELEASES_API_URL: 'https://api.github.com/repos/HR/Crypter/releases/latest',
     FORK: 'https://github.com/HR/Crypter/fork',
     DOCS: 'https://github.com/HR/Crypter/blob/master/readme.md',
     REPORT_ISSUE: 'https://github.com/HR/Crypter/issues/new'

app/index.js

@@ -5,7 +5,7 @@
  ******************************/
 // Electron
 
-const {app, dialog} = require('electron')
+const { app, dialog } = require('electron')
 // declare global constants
 // MasterPass credentials global
 global.creds = {}
@@ -20,19 +20,20 @@ global.paths = {
 }
 
 const logger = require('./script/logger')
-
+const { checkUpdate } = require('./script/utils')
 // Core
 const Db = require('./core/Db')
 // Windows
 const crypter = require('./src/crypter')
 const masterPassPrompt = require('./src/masterPassPrompt')
 const setup = require('./src/setup')
 const settings = require('./src/settings')
-const {ERRORS} = require('./config')
+const { ERRORS } = require('./config')
 // adds debug features like hotkeys for triggering dev tools and reload
 require('electron-debug')()
 
 // change exec path
+logger.info(`Crypter v${app.getVersion()}`)
 logger.info(`AppPath: ${app.getAppPath()}`)
 logger.info(`UseData Path: ${app.getPath('userData')}`)
 process.chdir(app.getAppPath())
@@ -68,6 +69,9 @@ const initMain = function () {
 
 // Main event handler
 app.on('ready', function () {
+  // Check for updates
+  checkUpdate()
+    .catch((err) => { logger.warn(err) })
   // Check synchronously whether paths exist
   init()
     .then((mainRun) => {
@@ -179,9 +183,23 @@ app.on('app:open-settings', () => {
   }
 })
 
-app.on('app:check-updates', () => {
+app.on('app:check-update', () => {
   logger.verbose('APP: app:check-updates event emitted')
   // Check for updates
+  checkUpdate()
+    .then((updateAvailable) => {
+      if (!updateAvailable) {
+        dialog.showMessageBox({
+          type: 'info',
+          message: 'No update available.',
+          detail: `You have the latest version Crypter ${app.getVersion()} :)`
+        })
+      }
+    })
+    .catch((err) => {
+      dialog.showErrorBox('Failed to check for update',
+        `An error occured while checking for update:\n ${err.message}`)
+    })
 })
 
 app.on('app:relaunch', () => {

app/script/utils.js

@@ -1,3 +1,14 @@
+const https = require('https')
+const { app, dialog, shell } = require('electron')
+const { REPO } = require('../config')
+const USER_AGENT = 'Crypter/x Wubba Lubba Dub Dub'
+const VERSION_REGEX = /[\.v]+/g
+const VERSION = parseV(app.getVersion())
+
+function parseV(str) {
+  return parseInt(str.replace(VERSION_REGEX, ''))
+}
+
 module.exports = {
   isRenderer: function () {
     // running in a web browser
@@ -10,5 +21,48 @@ module.exports = {
     if (!process.type) return false
 
     return process.type === 'renderer'
+  },
+  checkUpdate: function () {
+    return new Promise((resolve, reject) => {
+      https.get(REPO.RELEASES_API_URL, {
+          headers: { 'User-Agent': USER_AGENT }
+        }, (res) => {
+          let data = ''
+
+          res.on('data', (chunk) => {
+            data += chunk
+          })
+
+          res.on('end', () => {
+            try {
+              release = JSON.parse(data.toString('utf8'))
+              const LATEST_VERSION = parseV(release.tag_name)
+              if (VERSION < LATEST_VERSION) {
+                dialog.showMessageBox({
+                  type: 'info',
+                  message: `Update is available.`,
+                  detail: `A new version Crypter ${release.tag_name} is available.\nDo you want to get it?`,
+                  buttons: ['Get update', 'Later'],
+                  defaultId: 0,
+                  cancelId: 1,
+                  icon: null
+                }, (response) => {
+                  if (response === 0) {
+                    // Update button pressed
+                    shell.openExternal(release.html_url)
+                  }
+                })
+                resolve(true)
+              } else {
+                resolve(false)
+              }
+            } catch (err) {
+              reject(err)
+            }
+          })
+        })
+        .on('error', (err) => reject(err))
+    })
   }
+
 }

app/src/menu.js

@@ -51,9 +51,9 @@ if (process.platform === 'darwin') {
   menu.unshift({
     label: 'Crypter',
     submenu: [
-      // { label: 'About Crypter', click() { app.emit('app:about') } },
       { label: 'About Crypter', role: 'about' },
       { label: `Version ${app.getVersion()}`, enabled: false },
+      { label: 'Check for Update', click() { app.emit('app:check-update') } },
       { type: 'separator' },
       { label: 'Preferences…', click() { app.emit('app:open-settings') } },
       { type: 'separator' },