59 lines
1.6 KiB
TypeScript
59 lines
1.6 KiB
TypeScript
"use client";
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import { createContext, useContext, useEffect, useState } from "react";
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type Theme = "light" | "dark";
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interface ThemeContextType {
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theme: Theme;
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toggleTheme: () => void;
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}
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const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
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export function ThemeProvider({ children }: { children: React.ReactNode }) {
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const [theme, setTheme] = useState<Theme>("light");
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const [mounted, setMounted] = useState(false);
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useEffect(() => {
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setMounted(true);
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const savedTheme = localStorage.getItem("theme") as Theme | null;
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if (savedTheme) {
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setTheme(savedTheme);
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if (savedTheme === "dark") {
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document.documentElement.classList.add("dark");
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}
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} else if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
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setTheme("dark");
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document.documentElement.classList.add("dark");
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}
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}, []);
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const toggleTheme = () => {
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setTheme((prev) => {
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const newTheme = prev === "light" ? "dark" : "light";
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localStorage.setItem("theme", newTheme);
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if (newTheme === "dark") {
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document.documentElement.classList.add("dark");
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} else {
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document.documentElement.classList.remove("dark");
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}
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return newTheme;
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});
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};
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return (
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<ThemeContext.Provider value={{ theme, toggleTheme }}>
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{mounted ? children : <div>{children}</div>}
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</ThemeContext.Provider>
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);
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}
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export function useTheme() {
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const context = useContext(ThemeContext);
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if (!context) {
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throw new Error("useTheme must be used within a ThemeProvider");
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}
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return context;
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}
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