From 265a4f576fc2733104317eabe8144a735a566fb6 Mon Sep 17 00:00:00 2001
From: flexykrn <knpawar6000@gmail.com>
Date: Wed, 17 Jun 2026 17:54:30 +0530
Subject: [PATCH] Docusaurus migration - website-src-hooks

Part 69 of the Docusaurus migration split.
---
 website/src/hooks/useCountUp.ts | 156 ++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 website/src/hooks/useCountUp.ts

diff --git a/website/src/hooks/useCountUp.ts b/website/src/hooks/useCountUp.ts
new file mode 100644
index 00000000..f9722ee0
--- /dev/null
+++ b/website/src/hooks/useCountUp.ts
@@ -0,0 +1,156 @@
+import { useState, useEffect, useRef, useCallback } from 'react';
+
+function parseValue(value: string): { num: number; suffix: string; prefix: string } {
+  const cleaned = value.replace(/,/g, '').trim();
+  const match = cleaned.match(/^([^\d.-]*)([\d.]+)([^\d.]*)$/);
+  if (match) {
+    return { prefix: match[1], num: parseFloat(match[2]), suffix: match[3] };
+  }
+  const numMatch = cleaned.match(/[\d.]+/);
+  return { prefix: '', num: numMatch ? parseFloat(numMatch[0]) : 0, suffix: '' };
+}
+
+export function useCountUp(targetValue: string, duration = 1500) {
+  const [displayValue, setDisplayValue] = useState(targetValue);
+  const [hasStarted, setHasStarted] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el || typeof IntersectionObserver === 'undefined') {
+      setHasStarted(true);
+      return;
+    }
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting && !hasStarted) {
+          setHasStarted(true);
+        }
+      },
+      { threshold: 0.3 }
+    );
+
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [hasStarted, targetValue]);
+
+  useEffect(() => {
+    if (!hasStarted) return;
+
+    const { prefix, num, suffix } = parseValue(targetValue);
+    const startTime = performance.now();
+    let raf = 0;
+
+    const tick = (now: number) => {
+      const elapsed = now - startTime;
+      const progress = Math.min(elapsed / duration, 1);
+      const eased = 1 - Math.pow(1 - progress, 3);
+      const current = num * eased;
+
+      if (num >= 1000) {
+        setDisplayValue(`${prefix}${Math.floor(current).toLocaleString()}${suffix}`);
+      } else if (Number.isInteger(num)) {
+        setDisplayValue(`${prefix}${Math.floor(current)}${suffix}`);
+      } else {
+        setDisplayValue(`${prefix}${current.toFixed(num < 1 ? 4 : 2)}${suffix}`);
+      }
+
+      if (progress < 1) {
+        raf = requestAnimationFrame(tick);
+      } else {
+        setDisplayValue(targetValue);
+      }
+    };
+
+    raf = requestAnimationFrame(tick);
+    return () => cancelAnimationFrame(raf);
+  }, [hasStarted, targetValue, duration]);
+
+  return { ref, displayValue };
+}
+
+export function useInView(threshold = 0.3) {
+  const [inView, setInView] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el || typeof IntersectionObserver === 'undefined') {
+      setInView(true);
+      return;
+    }
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) setInView(true);
+      },
+      { threshold }
+    );
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [threshold]);
+
+  return { ref, inView };
+}
+
+export function useTypingEffect(words: string[], typingSpeed = 100, deletingSpeed = 50, pause = 2000) {
+  const [text, setText] = useState('');
+  const [wordIndex, setWordIndex] = useState(0);
+  const [isDeleting, setIsDeleting] = useState(false);
+  const [showCursor, setShowCursor] = useState(true);
+
+  useEffect(() => {
+    const currentWord = words[wordIndex];
+    let timer: ReturnType<typeof setTimeout>;
+
+    if (isDeleting) {
+      if (text === '') {
+        setIsDeleting(false);
+        setWordIndex((prev) => (prev + 1) % words.length);
+      } else {
+        timer = setTimeout(() => setText(text.slice(0, -1)), deletingSpeed);
+      }
+    } else {
+      if (text === currentWord) {
+        timer = setTimeout(() => setIsDeleting(true), pause);
+      } else {
+        timer = setTimeout(() => setText(currentWord.slice(0, text.length + 1)), typingSpeed);
+      }
+    }
+
+    return () => clearTimeout(timer);
+  }, [text, isDeleting, wordIndex, words, typingSpeed, deletingSpeed, pause]);
+
+  useEffect(() => {
+    const blink = setInterval(() => setShowCursor((s) => !s), 530);
+    return () => clearInterval(blink);
+  }, []);
+
+  return { text, showCursor };
+}
+
+export function useScrollProgress() {
+  const [progress, setProgress] = useState(0);
+
+  useEffect(() => {
+    let raf = 0;
+    const onScroll = () => {
+      if (raf) return;
+      raf = requestAnimationFrame(() => {
+        const top = window.scrollY;
+        const height = document.documentElement.scrollHeight - window.innerHeight;
+        setProgress(height > 0 ? top / height : 0);
+        raf = 0;
+      });
+    };
+
+    window.addEventListener('scroll', onScroll, { passive: true });
+    onScroll();
+    return () => {
+      window.removeEventListener('scroll', onScroll);
+      if (raf) cancelAnimationFrame(raf);
+    };
+  }, []);
+
+  return progress;
+}