Initial open-source self-hosted Songs2YT edition

hooks/useInView.ts

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+"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 };
+}

hooks/useMockupProgress.ts

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+"use client";
+
+import { useEffect, useState } from "react";
+
+export function useMockupProgress(
+  active: boolean,
+  phaseOneMs = 3000,
+  phaseTwoMs = 2000,
+) {
+  const [phase, setPhase] = useState<0 | 1 | 2>(0);
+  const [processed, setProcessed] = useState(false);
+
+  useEffect(() => {
+    if (!active) return;
+
+    const startFrame = requestAnimationFrame(() => setPhase(1));
+    const midTimer = setTimeout(() => setPhase(2), phaseOneMs);
+    const doneTimer = setTimeout(() => setProcessed(true), phaseOneMs + phaseTwoMs);
+
+    return () => {
+      cancelAnimationFrame(startFrame);
+      clearTimeout(midTimer);
+      clearTimeout(doneTimer);
+    };
+  }, [active, phaseOneMs, phaseTwoMs]);
+
+  const transitionMs = phase === 1 ? phaseOneMs : phase === 2 ? phaseTwoMs : 0;
+
+  return { phase, processed, transitionMs };
+}