First commit

hooks/use-toast.ts

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+"use client"
+
+// Inspired by react-hot-toast library
+import * as React from "react"
+
+import type {
+  ToastActionElement,
+  ToastProps,
+} from "@/components/ui/toast"
+
+const TOAST_LIMIT = 1
+const TOAST_REMOVE_DELAY = 1000000
+
+type ToasterToast = ToastProps & {
+  id: string
+  title?: React.ReactNode
+  description?: React.ReactNode
+  action?: ToastActionElement
+}
+
+const actionTypes = {
+  ADD_TOAST: "ADD_TOAST",
+  UPDATE_TOAST: "UPDATE_TOAST",
+  DISMISS_TOAST: "DISMISS_TOAST",
+  REMOVE_TOAST: "REMOVE_TOAST",
+} as const
+
+let count = 0
+
+function genId() {
+  count = (count + 1) % Number.MAX_SAFE_INTEGER
+  return count.toString()
+}
+
+type ActionType = typeof actionTypes
+
+type Action =
+  | {
+      type: ActionType["ADD_TOAST"]
+      toast: ToasterToast
+    }
+  | {
+      type: ActionType["UPDATE_TOAST"]
+      toast: Partial<ToasterToast>
+    }
+  | {
+      type: ActionType["DISMISS_TOAST"]
+      toastId?: ToasterToast["id"]
+    }
+  | {
+      type: ActionType["REMOVE_TOAST"]
+      toastId?: ToasterToast["id"]
+    }
+
+interface State {
+  toasts: ToasterToast[]
+}
+
+const toastTimeouts = new Map<string, ReturnType<typeof setTimeout>>()
+
+const addToRemoveQueue = (toastId: string) => {
+  if (toastTimeouts.has(toastId)) {
+    return
+  }
+
+  const timeout = setTimeout(() => {
+    toastTimeouts.delete(toastId)
+    dispatch({
+      type: "REMOVE_TOAST",
+      toastId: toastId,
+    })
+  }, TOAST_REMOVE_DELAY)
+
+  toastTimeouts.set(toastId, timeout)
+}
+
+export const reducer = (state: State, action: Action): State => {
+  switch (action.type) {
+    case "ADD_TOAST":
+      return {
+        ...state,
+        toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
+      }
+
+    case "UPDATE_TOAST":
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === action.toast.id ? { ...t, ...action.toast } : t
+        ),
+      }
+
+    case "DISMISS_TOAST": {
+      const { toastId } = action
+
+      // ! Side effects ! - This could be extracted into a dismissToast() action,
+      // but I'll keep it here for simplicity
+      if (toastId) {
+        addToRemoveQueue(toastId)
+      } else {
+        state.toasts.forEach((toast) => {
+          addToRemoveQueue(toast.id)
+        })
+      }
+
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === toastId || toastId === undefined
+            ? {
+                ...t,
+                open: false,
+              }
+            : t
+        ),
+      }
+    }
+    case "REMOVE_TOAST":
+      if (action.toastId === undefined) {
+        return {
+          ...state,
+          toasts: [],
+        }
+      }
+      return {
+        ...state,
+        toasts: state.toasts.filter((t) => t.id !== action.toastId),
+      }
+  }
+}
+
+const listeners: Array<(state: State) => void> = []
+
+let memoryState: State = { toasts: [] }
+
+function dispatch(action: Action) {
+  memoryState = reducer(memoryState, action)
+  listeners.forEach((listener) => {
+    listener(memoryState)
+  })
+}
+
+type Toast = Omit<ToasterToast, "id">
+
+function toast({ ...props }: Toast) {
+  const id = genId()
+
+  const update = (props: ToasterToast) =>
+    dispatch({
+      type: "UPDATE_TOAST",
+      toast: { ...props, id },
+    })
+  const dismiss = () => dispatch({ type: "DISMISS_TOAST", toastId: id })
+
+  dispatch({
+    type: "ADD_TOAST",
+    toast: {
+      ...props,
+      id,
+      open: true,
+      onOpenChange: (open) => {
+        if (!open) dismiss()
+      },
+    },
+  })
+
+  return {
+    id: id,
+    dismiss,
+    update,
+  }
+}
+
+function useToast() {
+  const [state, setState] = React.useState<State>(memoryState)
+
+  React.useEffect(() => {
+    listeners.push(setState)
+    return () => {
+      const index = listeners.indexOf(setState)
+      if (index > -1) {
+        listeners.splice(index, 1)
+      }
+    }
+  }, [state])
+
+  return {
+    ...state,
+    toast,
+    dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId }),
+  }
+}
+
+export { useToast, toast }

hooks/useScrollAnimation.ts

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+"use client";
+
+import { useEffect, useRef, useState, useCallback } from "react";
+
+interface UseScrollAnimationOptions {
+  threshold?: number;
+  rootMargin?: string;
+  triggerOnce?: boolean;
+}
+
+export function useScrollAnimation<T extends HTMLElement = HTMLDivElement>(
+  options: UseScrollAnimationOptions = {},
+) {
+  const { threshold = 0.1, rootMargin = "0px", triggerOnce = true } = options;
+
+  const ref = useRef<T>(null);
+  const [isVisible, setIsVisible] = useState(false);
+  const [hasTriggered, setHasTriggered] = useState(false);
+
+  useEffect(() => {
+    if (typeof window === "undefined") return; // extra safety
+
+    const element = ref.current;
+    if (!element) return;
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) {
+          setIsVisible(true);
+
+          if (triggerOnce) {
+            setHasTriggered(true);
+            observer.unobserve(element);
+          }
+        } else if (!triggerOnce) {
+          setIsVisible(false);
+        }
+      },
+      { threshold, rootMargin },
+    );
+
+    observer.observe(element);
+
+    return () => observer.disconnect();
+  }, [threshold, rootMargin, triggerOnce]);
+
+  const reset = useCallback(() => {
+    setIsVisible(false);
+    setHasTriggered(false);
+  }, []);
+
+  return {
+    ref,
+    isVisible: triggerOnce ? isVisible || hasTriggered : isVisible,
+    reset,
+  };
+}
+
+export function useCountUp(
+  end: number,
+  duration: number = 2000,
+  start: number = 0,
+) {
+  const [count, setCount] = useState(start);
+  const [isAnimating, setIsAnimating] = useState(false);
+  const countRef = useRef(start);
+
+  const startAnimation = useCallback(() => {
+    if (isAnimating) return;
+
+    setIsAnimating(true);
+    const startTime = Date.now();
+    const range = end - start;
+
+    const animate = () => {
+      const elapsed = Date.now() - startTime;
+      const progress = Math.min(elapsed / duration, 1);
+
+      const easeOut = 1 - Math.pow(1 - progress, 3);
+      const currentCount = Math.floor(start + range * easeOut);
+
+      countRef.current = currentCount;
+      setCount(currentCount);
+
+      if (progress < 1) {
+        requestAnimationFrame(animate);
+      } else {
+        setCount(end);
+        setIsAnimating(false);
+      }
+    };
+
+    requestAnimationFrame(animate);
+  }, [end, duration, start, isAnimating]);
+
+  const reset = useCallback(() => {
+    setCount(start);
+    setIsAnimating(false);
+  }, [start]);
+
+  return { count, startAnimation, reset, isAnimating };
+}
+
+export function useParallax(speed: number = 0.5) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [offset, setOffset] = useState(0);
+
+  useEffect(() => {
+    if (typeof window === "undefined") return;
+
+    const handleScroll = () => {
+      if (!ref.current) return;
+
+      const rect = ref.current.getBoundingClientRect();
+      const scrolled = window.scrollY;
+      const elementTop = rect.top + scrolled;
+      const relativeScroll = scrolled - elementTop + window.innerHeight;
+
+      setOffset(relativeScroll * speed * 0.1);
+    };
+
+    window.addEventListener("scroll", handleScroll, { passive: true });
+    handleScroll();
+
+    return () => {
+      window.removeEventListener("scroll", handleScroll);
+    };
+  }, [speed]);
+
+  return { ref, offset };
+}

hooks/useTheme.ts

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+"use client";
+
+import { useState } from "react";
+import { useTheme as useNextTheme } from "next-themes";
+
+export function useTheme() {
+  const { theme, resolvedTheme, setTheme } = useNextTheme();
+  const [mounted] = useState(true);
+
+  const currentTheme = resolvedTheme ?? theme ?? "light";
+
+  const toggleTheme = () => {
+    setTheme(currentTheme === "dark" ? "light" : "dark");
+  };
+
+  return {
+    theme: currentTheme,
+    setTheme,
+    toggleTheme,
+    mounted,
+  };
+}