40 lines
1.2 KiB
TypeScript
40 lines
1.2 KiB
TypeScript
import { createContext, useContext, useState, useEffect, type ReactNode } from 'react';
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type ThemeMode = 'dark' | 'light';
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interface ThemeContextType {
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themeMode: ThemeMode;
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toggleTheme: () => void;
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isDark: boolean;
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}
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const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
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const STORAGE_KEY = 'paperless-theme-mode';
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export function ThemeProvider({ children }: { children: ReactNode }) {
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const [themeMode, setThemeMode] = useState<ThemeMode>(() => {
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const stored = localStorage.getItem(STORAGE_KEY);
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return (stored === 'light' || stored === 'dark') ? stored : 'dark';
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});
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useEffect(() => {
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localStorage.setItem(STORAGE_KEY, themeMode);
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document.documentElement.setAttribute('data-theme', themeMode);
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}, [themeMode]);
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const toggleTheme = () => setThemeMode((prev) => (prev === 'dark' ? 'light' : 'dark'));
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return (
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<ThemeContext.Provider value={{ themeMode, toggleTheme, isDark: themeMode === 'dark' }}>
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{children}
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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 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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