Added update ipc handler

src/electron/ipc/UpdateHandler.ipc.ts

@@ -0,0 +1,99 @@
+import { IPCEmitHandler, IPCInvokeHandler } from '../shared/IPCHandler'
+import { autoUpdater, UpdateInfo } from 'electron-updater'
+import { emitIPCEvent } from '../main'
+
+export interface UpdateProgress {
+  bytesPerSecond: number
+  percent: number
+  transferred: number
+  total: number
+}
+
+/**
+ * Checks for updates when the program is launched.
+ */
+class UpdateChecker {
+
+  constructor() {
+    autoUpdater.autoDownload = false
+    autoUpdater.logger = null
+    this.registerUpdaterListeners()
+    autoUpdater.checkForUpdates()
+  }
+
+  private registerUpdaterListeners() {
+    autoUpdater.on('error', (err: Error) => {
+      console.log('token:', process.env.GH_TOKEN)
+      console.log('error callback', err)
+      emitIPCEvent('update-error', err)
+    })
+
+    autoUpdater.on('update-available', (info: UpdateInfo) => {
+      console.log('update available callback', info)
+      emitIPCEvent('update-available', info)
+    })
+  }
+}
+
+new UpdateChecker()
+
+/**
+ * Handles the 'get-current-version' event.
+ */
+class GetCurrentVersionHandler implements IPCInvokeHandler<'get-current-version'> {
+  event: 'get-current-version' = 'get-current-version'
+
+  /**
+   * @returns the current version of Bridge.
+   */
+  handler() {
+    console.log('Printing version:', autoUpdater.currentVersion.raw)
+    return autoUpdater.currentVersion.raw // TODO: display this on the about page
+  }
+}
+
+export const getCurrentVersionHandler = new GetCurrentVersionHandler()
+
+/**
+ * Handles the 'download-update' event.
+ */
+class DownloadUpdateHandler implements IPCEmitHandler<'download-update'> {
+  event: 'download-update' = 'download-update'
+  downloading = false
+
+  /**
+   * Begins the process of downloading the latest update.
+   */
+  handler() {
+    if (this.downloading) { return }
+    this.downloading = true
+
+    autoUpdater.on('download-progress', (updateProgress: UpdateProgress) => {
+      emitIPCEvent('update-progress', updateProgress)
+    })
+
+    autoUpdater.on('update-downloaded', () => {
+      emitIPCEvent('update-downloaded', undefined)
+    })
+
+    autoUpdater.downloadUpdate()
+  }
+}
+
+export const downloadUpdateHandler = new DownloadUpdateHandler()
+
+/**
+ * Handles the 'quit-and-install' event.
+ */
+class QuitAndInstallHandler implements IPCEmitHandler<'quit-and-install'> {
+  event: 'quit-and-install' = 'quit-and-install'
+
+  /**
+   * Immediately closes the application and installs the update.
+   */
+  handler() {
+    autoUpdater.quitAndInstall() // autoUpdater installs a downloaded update on the next program restart by default
+  }
+}
+
+export const quitAndInstallHandler = new QuitAndInstallHandler()