saas-platform/frontend/saas-web/electron/main.js

const electron = require('electron');
const app = electron.app;
const BrowserWindow = electron.BrowserWindow;
const ipcMain = electron.ipcMain;
const globalShortcut = electron.globalShortcut;
const { autoUpdater } = require('electron-updater');
const path = require('path');
const url = require('url');
const profile = process.argv[process.argv.length - 1];
const extDir = profile == 'local' ? '../build/production/saas' : 'dist';
let updateWindow;
let loginWindow;
let mainWindow;

// 监听session变化
ipcMain.on('session.change', (event, arg) => {
    if (arg) {
        loginWindow && loginWindow.close();
        if (!mainWindow) {
			createMainWindow();
		}
		if (!mainWindow.isVisible()) {
			loadMainContents(arg);
		}
    } else {
        if (mainWindow) {
            mainWindow.hide();
            mainWindow.webContents.reload();
        }
        !loginWindow && createLoginWindow(true);
    }
});
function sendUpdateMessage(channel, message) {
    if (updateWindow.webContents.isLoading()) {
        updateWindow.webContents.on("did-finish-load", function() {
            updateWindow.webContents.send(channel, message);
        });
    } else {
        updateWindow.webContents.send(channel, message);
    }
}
autoUpdater.on('error', function (error) {
    loginWindow.show();
	// 预加载主页
    createMainWindow(false);
    updateWindow && updateWindow.close();
});
autoUpdater.on('update-available', function (info) {
    updateWindow && updateWindow.show();
    sendUpdateMessage('message', info);
});
autoUpdater.on('update-not-available', function (info) {
    loginWindow.show();
	// 预加载主页
    createMainWindow(false);
    updateWindow && updateWindow.close();
});
// 下载进度
autoUpdater.on('download-progress', function (progressObj) {
    sendUpdateMessage('downloadProgress', progressObj);
});
autoUpdater.on('update-downloaded', function () {
    // 下载完自动安装
    autoUpdater.quitAndInstall();
});
// 自动更新窗口
function createUpdateWindow() {
    updateWindow = new BrowserWindow({ width: 453, height: 538, frame: false, show: false });
    updateWindow.loadURL(url.format({
        pathname: path.join(__dirname, 'update.html'),
        protocol: 'file:',
        slashes: true
    }));
    updateWindow.on('closed', function () {
        updateWindow = null;
    });
    autoUpdater.checkForUpdates();
    // updateWindow.webContents.on("did-finish-load", function() {
    //     autoUpdater.checkForUpdates();
    // });
}
// 登录窗口
function createLoginWindow(show) {
    loginWindow = new BrowserWindow({ width: 453, height: 538, show: !!show, title: '账户登录 - U企云服', fullscreenable: false, maximizable: false, resizable: false });
    loginWindow.loadURL(url.format({
        pathname: path.join(__dirname, 'login.html'),
        protocol: 'file:',
        slashes: true
    }));

    loginWindow.on('closed', function () {
        loginWindow = null;
		if (mainWindow && !mainWindow.isVisible()) {
            mainWindow.close();
        }
    });
}
// 主窗口
function createMainWindow (show) {
    const electronScreen = electron.screen;
    const size = electronScreen.getPrimaryDisplay().workAreaSize;
    mainWindow = new BrowserWindow({ width: size.width, height: size.height, show: !!show });
	if (profile == 'dev') {
        mainWindow.loadURL('http://127.0.0.1:1841/');
    } else {
        mainWindow.loadURL(url.format({
            pathname: path.join(__dirname, extDir + '/index.html'),
            protocol: 'file:',
            slashes: true
        }));
    }
    
    mainWindow.on('closed', function () {
        mainWindow = null;
    });
}
function loadMainContents(session) {
    mainWindow.webContents.send("session", session);
    mainWindow.maximize();
    mainWindow.show();
}

function onReady() {
    globalShortcut.register('ctrl+shift+d', function() {
        const win = BrowserWindow.getFocusedWindow();
        win && win.webContents.openDevTools();
    });
    createUpdateWindow();
    // 预加载登录页
    createLoginWindow(false);
}

app.on('ready', onReady);

app.on('will-quit', function() {
    globalShortcut.unregisterAll();
});

// Quit when all windows are closed, except for Mac users
app.on('window-all-closed', function () {
    if (process.platform !== 'darwin') {
        app.quit();
    }
});

app.on('activate', function () {
    if (mainWindow === null) {
        onReady();
    }
});