initial commit

.gitignore

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+node_modules/
+dist/

fallback.html

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+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>RVV – Offline</title>
+  <style>
+    * { margin: 0; padding: 0; box-sizing: border-box; }
+    body {
+      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      min-height: 100vh;
+      background: #f5f5f5;
+      color: #333;
+      text-align: center;
+      padding: 2rem;
+    }
+    .container { max-width: 480px; }
+    h1 { font-size: 1.5rem; margin-bottom: 1rem; }
+    p { margin-bottom: 1.5rem; line-height: 1.6; }
+    button {
+      padding: 0.75rem 1.5rem;
+      font-size: 1rem;
+      background: #0066cc;
+      color: #fff;
+      border: none;
+      border-radius: 4px;
+      cursor: pointer;
+    }
+    button:hover { background: #0052a3; }
+  </style>
+</head>
+<body>
+  <div class="container">
+    <h1>Keine Verbindung</h1>
+    <p>Die Website rvv.de konnte nicht geladen werden. Bitte überprüfen Sie Ihre Internetverbindung und versuchen Sie es erneut.</p>
+    <button onclick="window.location.href='https://www.rvv.de'">Erneut versuchen</button>
+  </div>
+</body>
+</html>

main.js

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+const { app, BrowserWindow, Tray, Menu, shell } = require('electron');
+const path = require('path');
+
+const TARGET_URL = 'https://www.rvv.de';
+
+let mainWindow = null;
+let tray = null;
+
+function createWindow() {
+  mainWindow = new BrowserWindow({
+    width: 414,
+    height: 896,
+    title: 'RVV',
+    webPreferences: {
+      preload: path.join(__dirname, 'preload.js'),
+      contextIsolation: true,
+      nodeIntegration: false,
+    },
+  });
+
+  mainWindow.loadURL(TARGET_URL);
+
+  // Minimize to tray instead of closing
+  mainWindow.on('close', (event) => {
+    if (!app.isQuitting) {
+      event.preventDefault();
+      mainWindow.hide();
+    }
+  });
+
+  // Open external links in the system browser
+  mainWindow.webContents.setWindowOpenHandler(({ url }) => {
+    const targetHost = new URL(TARGET_URL).host;
+    const linkHost = new URL(url).host;
+    if (!linkHost.endsWith(targetHost)) {
+      shell.openExternal(url);
+      return { action: 'deny' };
+    }
+    return { action: 'allow' };
+  });
+
+  // Handle navigation to external sites
+  mainWindow.webContents.on('will-navigate', (event, url) => {
+    const targetHost = new URL(TARGET_URL).host;
+    try {
+      const linkHost = new URL(url).host;
+      if (!linkHost.endsWith(targetHost)) {
+        event.preventDefault();
+        shell.openExternal(url);
+      }
+    } catch {
+      // allow navigation if URL parsing fails
+    }
+  });
+
+  // Show fallback page if the site fails to load
+  mainWindow.webContents.on('did-fail-load', (_event, _code, _desc, url) => {
+    if (url.startsWith(TARGET_URL)) {
+      mainWindow.loadFile('fallback.html');
+    }
+  });
+}
+
+function createTray() {
+  tray = new Tray(path.join(__dirname, 'rvv-icon.png'));
+
+  const contextMenu = Menu.buildFromTemplate([
+    {
+      label: 'Show RVV',
+      click: () => {
+        mainWindow.show();
+      },
+    },
+    { type: 'separator' },
+    {
+      label: 'Quit',
+      click: () => {
+        app.isQuitting = true;
+        app.quit();
+      },
+    },
+  ]);
+
+  tray.setToolTip('RVV');
+  tray.setContextMenu(contextMenu);
+
+  // Click on tray icon shows the window
+  tray.on('click', () => {
+    mainWindow.show();
+  });
+}
+
+app.whenReady().then(() => {
+  createWindow();
+  createTray();
+
+  app.on('activate', () => {
+    if (BrowserWindow.getAllWindows().length === 0) {
+      createWindow();
+    } else {
+      mainWindow.show();
+    }
+  });
+});
+
+app.on('window-all-closed', () => {
+  // Don't quit on window close — we live in the tray
+});

package.json

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+{
+  "name": "rvv-app",
+  "version": "1.0.0",
+  "description": "Electron wrapper for rvv.de",
+  "main": "main.js",
+  "scripts": {
+    "start": "electron .",
+    "build": "electron-builder"
+  },
+  "author": "",
+  "license": "MIT",
+  "build": {
+    "icon": "rvv-icon.png",
+    "linux": {
+      "category": "Utility;Maps"
+    }
+  },
+  "devDependencies": {
+    "electron": "35.1.5",
+    "electron-builder": "26.0.12"
+  }
+}

preload.js

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+// Preload script — runs in a sandboxed context before the page loads.
+// Add any contextBridge or ipcRenderer bindings here if needed in the future.
+
+window.addEventListener('DOMContentLoaded', () => {
+  // App is ready
+});