47 lines
1.5 KiB
TypeScript
47 lines
1.5 KiB
TypeScript
'use client';
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import type {Dispatch, SetStateAction, ReactNode} from 'react';
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import type {Theme} from '@/types/domain';
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import {createContext, useContext, useEffect, useState} from 'react';
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interface ThemeContextValue {
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theme: Theme;
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setTheme: Dispatch<SetStateAction<Theme>>;
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toggleTheme: () => void;
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mounted: boolean;
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}
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const ThemeContext = createContext<ThemeContextValue | null>(null);
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export function ThemeProvider({children}: {children: 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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const saved = window.localStorage.getItem('rm-theme');
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if (saved === 'light' || saved === 'dark') {
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setTheme(saved);
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} else if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
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setTheme('dark');
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}
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setMounted(true);
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}, []);
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useEffect(() => {
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const root = document.documentElement;
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root.classList.remove('light', 'dark');
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root.classList.add(theme);
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window.localStorage.setItem('rm-theme', theme);
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}, [theme]);
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const toggleTheme = () => setTheme(t => (t === 'dark' ? 'light' : 'dark'));
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return <ThemeContext.Provider value={{theme, setTheme, toggleTheme, mounted}}>{children}</ThemeContext.Provider>;
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}
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export function useTheme() {
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const ctx = useContext(ThemeContext);
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if (!ctx) throw new Error('useTheme must be used within ThemeProvider');
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return ctx;
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}
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