Parse user agent header

src/utils/userAgent.ts

@@ -0,0 +1,13 @@
+export function parseUserAgent(userAgent: string): string {
+    const ua = userAgent.toLowerCase();
+
+    if (ua.includes("com.google.android.youtube/") || ua.includes("com.vanced.android.youtube/")) {
+        return `Vanced/${ua.match(/.android.youtube\/([^\s]+)/)[1]}`;
+    }
+
+    if (ua.includes("mpv_sponsorblock/")) {
+        return ua;
+    }
+
+    return "";
+}