Stirling-PDF/frontend/src/index.tsx

import '@mantine/core/styles.css';
import '../vite-env.d.ts';
import './index.css'; // Import Tailwind CSS
import React from 'react';
import ReactDOM from 'react-dom/client';
import { ColorSchemeScript } from '@mantine/core';
import { BrowserRouter } from 'react-router-dom';
import App from './App';
import './i18n'; // Initialize i18next
import posthog from 'posthog-js';
import { PostHogProvider } from 'posthog-js/react';

// Compute initial color scheme
function getInitialScheme(): 'light' | 'dark' {
  const stored = localStorage.getItem('stirling-theme');
  if (stored === 'light' || stored === 'dark') return stored;
  try {
    const prefersDark = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
    return prefersDark ? 'dark' : 'light';
  } catch {
    return 'light';
  }
}

posthog.init(import.meta.env.VITE_PUBLIC_POSTHOG_KEY, {
  api_host: import.meta.env.VITE_PUBLIC_POSTHOG_HOST,
  defaults: '2025-05-24',
  capture_exceptions: true, // This enables capturing exceptions using Error Tracking, set to false if you don't want this
  debug: false,
  opt_out_capturing_by_default: false, // We handle opt-out via cookie consent
});

function updatePosthogConsent(){
    if(typeof(posthog) == "undefined") {
      return;
    }
    const optIn = (window.CookieConsent as any).acceptedCategory('analytics');
    optIn?
      posthog.opt_in_capturing() : posthog.opt_out_capturing();

    console.log("Updated analytics consent: ", optIn? "opted in" : "opted out");
  }

window.addEventListener("cc:onConsent", updatePosthogConsent);
window.addEventListener("cc:onChange", updatePosthogConsent);

const container = document.getElementById('root');
if (!container) {
  throw new Error("Root container missing in index.html");
}

const root = ReactDOM.createRoot(container); // Finds the root DOM element
root.render(
  <React.StrictMode>
    <ColorSchemeScript defaultColorScheme={getInitialScheme()} />
    <PostHogProvider
      client={posthog}
    >
      <BrowserRouter>
        <App />
      </BrowserRouter>
    </PostHogProvider>
  </React.StrictMode>
);