feat: add single player mode

apps/marketing/src/providers/posthog.tsx

@@ -0,0 +1,39 @@
+'use client';
+
+import { useEffect } from 'react';
+
+import { usePathname, useSearchParams } from 'next/navigation';
+
+import posthog from 'posthog-js';
+
+import { extractPostHogConfig } from '@documenso/lib/constants/feature-flags';
+
+export function PostHogPageview() {
+  const postHogConfig = extractPostHogConfig();
+
+  const pathname = usePathname();
+  const searchParams = useSearchParams();
+
+  if (typeof window !== 'undefined' && postHogConfig) {
+    posthog.init(postHogConfig.key, {
+      api_host: postHogConfig.host,
+      disable_session_recording: true,
+    });
+  }
+
+  useEffect(() => {
+    if (!postHogConfig || !pathname) {
+      return;
+    }
+
+    let url = window.origin + pathname;
+    if (searchParams && searchParams.toString()) {
+      url = url + `?${searchParams.toString()}`;
+    }
+    posthog.capture('$pageview', {
+      $current_url: url,
+    });
+  }, [pathname, searchParams, postHogConfig]);
+
+  return null;
+}