Initial open-source self-hosted Songs2YT edition

hooks/useInView.ts

@@ -0,0 +1,40 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+
+type Options = {
+  threshold?: number;
+  rootMargin?: string;
+  once?: boolean;
+};
+
+export function useInView<T extends HTMLElement = HTMLDivElement>({
+  threshold = 0.15,
+  rootMargin = "0px 0px -40px 0px",
+  once = true,
+}: Options = {}) {
+  const ref = useRef<T>(null);
+  const [inView, setInView] = useState(false);
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) {
+          setInView(true);
+          if (once) observer.unobserve(el);
+        } else if (!once) {
+          setInView(false);
+        }
+      },
+      { threshold, rootMargin },
+    );
+
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [threshold, rootMargin, once]);
+
+  return { ref, inView };
+}