updater.js

const { dialog, BrowserWindow } = require("electron");
const { autoUpdater } = require("electron-updater");

const path = require("path");
const url = require("url");

autoUpdater.logger = require("electron-log");
autoUpdater.logger.transports.file.level = "info";

autoUpdater.autoDownload = false;

exports.check = () => {
  autoUpdater.checkForUpdates();

  autoUpdater.on("update-available", () => {
    dialog
      .showMessageBox({
        type: "info",
        title: "Update Available",
        message:
          "A new version of PIA is available. Do you want to update now?",
        buttons: ["Update", "No"]
      })
      .then(result => {
        console.log(result.response);
        if (result.response !== 0) return;

        autoUpdater.downloadUpdate();
        let progressWin = new BrowserWindow({
          width: 350,
          height: 35,
          useContentSize: true,
          autoHideMenuBar: true,
          maximizable: false,
          fullscreen: false,
          fullscreenable: false,
          resizable: false
        });

        progressWin.loadURL(
          url.format({
            pathname: path.join(__dirname, "renderer", "progress.html"),
            protocol: "file:",
            slashes: true
          })
        );

        progressWin.on("closed", () => {
          progressWin = null;
        });
        autoUpdater.on("update-downloaded", () => {
          if (progressWin) progressWin.close();
          dialog
            .showMessageBox({
              type: "info",
              title: "Update ready",
              message: "A new version of PIA is ready. Quit and install now?",
              buttons: ["Yes", "Later"]
            })
            .then(result => {
              if (result.response === 0) autoUpdater.quitAndInstall();
            })
            .catch(err => {
              console.log(err);
            });
        });
      })
      .catch(err => {
        console.log(err);
      });
  });
};