main.js

'use strict';

const path = require("path");

// Modules to control application life and create native browser window
const {app, BrowserWindow, screen} = require("electron");
require('@electron/remote/main').initialize()

// Check if Electron is running in development 
const isDev = require("electron-is-dev");
if (isDev) {
    console.log("Running in development");
    // Refresh WebContents of all BrowserWindow
    // require('electron-reload')(__dirname);
    require('electron-reload')(__dirname, {
        electron: path.join(__dirname, 'node_modules', '.bin', 'electron'),
        hardResetMethod: 'exit'
    });
}

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;

function createWindow() {

    const display = screen.getPrimaryDisplay()
    const maxiSize = display.workAreaSize
    // Create the browser window.
    mainWindow = new BrowserWindow({
        width: maxiSize.width,
        height: maxiSize.height,
        icon: path.join(__dirname, 'build-res/icon.png'),
        webPreferences: {
            nodeIntegration: true,
            contextIsolation: false,
            devTools: true,
            webviewTag: true,
            resizable: true,
            enableRemoteModule: true
        }
    });

    // and load the index.html of the app.
    mainWindow.loadURL('file://' + path.join(__dirname, 'dist/index.html'));

    // Open the DevTools.
    if (isDev) {
        mainWindow.webContents.openDevTools()
    }

    // Emitted when the window is closed.
    mainWindow.on("closed", function () {
        // Dereference the window object, usually you would store windows
        // in an array if your app supports multi windows, this is the time
        // when you should delete the corresponding element.
        mainWindow = null;
    });

    const {session: {webRequest}} = mainWindow.webContents;

    require("@electron/remote/main").enable(mainWindow.webContents)

    const filter = {
        urls: [
            'http://localhost/keycloak-redirect*',
            'http://localhost/keycloak-logout*'
        ]
    };
    webRequest.onBeforeRequest(filter, async ({url}) => {

        if (url.indexOf('keycloak-logout') !== -1) {

            console.log('onBeforeRequest.user logged out')

            mainWindow.loadURL('file://' + path.join(__dirname, 'dist/index.html'));
        } else {

            const params = url.slice(url.indexOf('#'));

            console.log('onBeforeRequest.catch http://localhost/keycloak-redirect')
            console.log('onBeforeRequest.params', params)
            console.log('onBeforeRequest.loading URL')

            // see keycloak adaptaion
            mainWindow.loadURL('file://' + path.join(__dirname, 'dist/index.html') + '#/piece-to-remove' + params);

        }
    });
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on("ready", createWindow);

// Quit when all windows are closed.
app.on("window-all-closed", function () {
    // On OS X 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", function () {
    // On OS X 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 (mainWindow === null) {
        createWindow();
    }
});