56 lines
1.4 KiB
TypeScript
56 lines
1.4 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 ThemeContextValue {
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theme: Theme
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toggle: () => void
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}
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const ThemeContext = createContext<ThemeContextValue>({
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theme: "dark",
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toggle: () => {},
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})
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export function useTheme() {
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return useContext(ThemeContext)
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}
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export default function ThemeProvider({ children }: { children: React.ReactNode }) {
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const [theme, setTheme] = useState<Theme>("dark")
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const [mounted, setMounted] = useState(false)
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useEffect(() => {
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// Read from localStorage, fall back to system preference
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const stored = localStorage.getItem("food-theme") as Theme | null
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if (stored === "light" || stored === "dark") {
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setTheme(stored)
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} else {
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const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches
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setTheme(prefersDark ? "dark" : "light")
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}
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setMounted(true)
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}, [])
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useEffect(() => {
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if (!mounted) return
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const root = document.documentElement
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if (theme === "dark") {
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root.classList.add("dark")
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} else {
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root.classList.remove("dark")
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}
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localStorage.setItem("food-theme", theme)
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}, [theme, mounted])
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const toggle = () => setTheme((t) => (t === "dark" ? "light" : "dark"))
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return (
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<ThemeContext.Provider value={{ theme, toggle }}>
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{children}
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</ThemeContext.Provider>
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)
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}
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