86 lines
2.0 KiB
TypeScript
86 lines
2.0 KiB
TypeScript
'use client'
|
|
|
|
import React, { createContext, useContext, useEffect, useState } from 'react'
|
|
|
|
type Theme = 'dark' | 'light' | 'system'
|
|
|
|
type ThemeProviderProps = {
|
|
children: React.ReactNode
|
|
defaultTheme?: Theme
|
|
storageKey?: string
|
|
}
|
|
|
|
type ThemeProviderState = {
|
|
theme: Theme
|
|
setTheme: (theme: Theme) => void
|
|
}
|
|
|
|
const initialState: ThemeProviderState = {
|
|
theme: 'dark',
|
|
setTheme: () => null,
|
|
}
|
|
|
|
const ThemeProviderContext = createContext<ThemeProviderState>(initialState)
|
|
|
|
export function ThemeProvider({
|
|
children,
|
|
defaultTheme = 'dark',
|
|
storageKey = 'ui-theme',
|
|
...props
|
|
}: ThemeProviderProps) {
|
|
const [theme, setTheme] = useState<Theme>(defaultTheme)
|
|
const [mounted, setMounted] = useState(false)
|
|
|
|
useEffect(() => {
|
|
setMounted(true)
|
|
const savedTheme = localStorage?.getItem(storageKey) as Theme
|
|
if (savedTheme) {
|
|
setTheme(savedTheme)
|
|
}
|
|
}, [storageKey])
|
|
|
|
useEffect(() => {
|
|
if (!mounted) return
|
|
|
|
const root = window.document.documentElement
|
|
|
|
root.classList.remove('light', 'dark')
|
|
|
|
if (theme === 'system') {
|
|
const systemTheme = window.matchMedia('(prefers-color-scheme: dark)')
|
|
.matches
|
|
? 'dark'
|
|
: 'light'
|
|
|
|
root.classList.add(systemTheme)
|
|
return
|
|
}
|
|
|
|
root.classList.add(theme)
|
|
}, [theme, mounted])
|
|
|
|
const value = {
|
|
theme,
|
|
setTheme: (theme: Theme) => {
|
|
if (mounted) {
|
|
localStorage?.setItem(storageKey, theme)
|
|
}
|
|
setTheme(theme)
|
|
},
|
|
}
|
|
|
|
return (
|
|
<ThemeProviderContext.Provider {...props} value={value}>
|
|
{children}
|
|
</ThemeProviderContext.Provider>
|
|
)
|
|
}
|
|
|
|
export const useTheme = () => {
|
|
const context = useContext(ThemeProviderContext)
|
|
|
|
if (context === undefined)
|
|
throw new Error('useTheme must be used within a ThemeProvider')
|
|
|
|
return context
|
|
}
|