93 lines
2.2 KiB
TypeScript
93 lines
2.2 KiB
TypeScript
import { createContext, useContext, useEffect, useState, ReactNode } from 'react'
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type Theme = 'dark' | 'light' | 'system'
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type ThemeProviderProps = {
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children: ReactNode
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defaultTheme?: Theme
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storageKey?: string
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}
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type ThemeProviderState = {
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theme: Theme
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setTheme: (theme: Theme) => void
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}
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const initialState: ThemeProviderState = {
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theme: 'system',
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setTheme: () => null,
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}
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const ThemeProviderContext = createContext<ThemeProviderState>(initialState)
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export function ThemeProvider({
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children,
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defaultTheme = 'system',
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storageKey = 'vite-ui-theme',
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...props
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}: ThemeProviderProps) {
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const [theme, setTheme] = useState<Theme>(() => {
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// Try localStorage first, fall back to sessionStorage, then default
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try {
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return (localStorage.getItem(storageKey) as Theme) ||
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(sessionStorage.getItem(storageKey) as Theme) ||
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defaultTheme
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} catch (e) {
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// Storage unavailable (incognito/privacy mode) - use default
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return defaultTheme
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}
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})
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useEffect(() => {
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const root = window.document.documentElement
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root.classList.remove('light', 'dark')
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if (theme === 'system') {
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const systemTheme = window.matchMedia('(prefers-color-scheme: dark)')
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.matches
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? 'dark'
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: 'light'
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root.classList.add(systemTheme)
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return
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}
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root.classList.add(theme)
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}, [theme])
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const value = {
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theme,
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setTheme: (theme: Theme) => {
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// Try to persist to localStorage, fall back to sessionStorage
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try {
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localStorage.setItem(storageKey, theme)
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} catch (e) {
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// localStorage unavailable (incognito) - use sessionStorage
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try {
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sessionStorage.setItem(storageKey, theme)
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} catch (err) {
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// Both unavailable - just update state without persistence
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console.warn('Storage unavailable, theme preference will not persist')
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}
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}
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setTheme(theme)
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},
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}
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return (
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<ThemeProviderContext.Provider {...props} value={value}>
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{children}
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</ThemeProviderContext.Provider>
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)
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}
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export const useTheme = () => {
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const context = useContext(ThemeProviderContext)
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if (context === undefined)
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throw new Error('useTheme must be used within a ThemeProvider')
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return context
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}
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