budibase/packages/server/src/electron.js

const { app, BrowserWindow, shell } = require("electron")
const { join } = require("path")
const isDev = require("electron-is-dev")
const { autoUpdater } = require("electron-updater")
const unhandled = require("electron-unhandled")
const { existsSync } = require("fs-extra")
const initialiseBudibase = require("./utilities/initialiseBudibase")
const { budibaseAppsDir } = require("./utilities/budibaseDir")

const budibaseDir = budibaseAppsDir()
const envFile = join(budibaseDir, ".env")

if (!existsSync(envFile)) {
  // assume not initialised
  initialiseBudibase({ dir: budibaseDir }).then(() => {
    startApp()
  })
} else {
  startApp()
}

function startApp() {
  // evict environment from cache, so it reloads when next asked
  delete require.cache[require.resolve("./environment")]
  require("dotenv").config({ path: envFile })

  if (isDev) {
    unhandled({
      showDialog: true,
    })
  }

  const APP_URL = "http://localhost:4001/_builder"
  const APP_TITLE = "Budibase Builder"

  let win

  function handleRedirect(e, url) {
    e.preventDefault()
    shell.openExternal(url)
  }

  async function createWindow() {
    app.server = await require("./app")()
    win = new BrowserWindow({ width: 1920, height: 1080 })
    win.setTitle(APP_TITLE)
    win.loadURL(APP_URL)
    if (isDev) {
      win.webContents.openDevTools()
    } else {
      autoUpdater.checkForUpdatesAndNotify()
    }

    // open _blank in default browser
    win.webContents.on("new-window", handleRedirect)
    win.webContents.on("will-navigate", handleRedirect)
  }

  app.whenReady().then(createWindow)

  // Quit when all windows are closed.
  app.on("window-all-closed", () => {
    // On macOS it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== "darwin") app.quit()
  })

  app.on("activate", () => {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (win === null) createWindow()
  })
}