67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
/* eslint-disable react-refresh/only-export-components */
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import { createContext, useContext, useState, useEffect } from "react";
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const ThemeContext = createContext();
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export function ThemeProvider({ children }) {
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const [theme, setThemeState] = useState(() => {
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try {
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return localStorage.getItem("brew-theme") || "system";
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} catch {
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return "system";
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}
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});
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const [resolvedTheme, setResolvedTheme] = useState("light");
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const setTheme = (newTheme) => {
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try {
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localStorage.setItem("brew-theme", newTheme);
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} catch (e) {
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console.error("Failed to set theme in localStorage", e);
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}
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setThemeState(newTheme);
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};
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useEffect(() => {
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const root = window.document.documentElement;
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const mediaQuery = window.matchMedia("(prefers-color-scheme: dark)");
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const applyTheme = () => {
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const isDark = theme === "dark" || (theme === "system" && mediaQuery.matches);
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if (isDark) {
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root.classList.add("dark");
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setResolvedTheme("dark");
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} else {
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root.classList.remove("dark");
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setResolvedTheme("light");
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}
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};
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applyTheme();
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const handleChange = () => {
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if (theme === "system") {
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applyTheme();
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}
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};
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mediaQuery.addEventListener("change", handleChange);
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return () => mediaQuery.removeEventListener("change", handleChange);
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}, [theme]);
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return (
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<ThemeContext.Provider value={{ theme, setTheme, isDark: resolvedTheme === "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 context = useContext(ThemeContext);
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if (!context) {
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throw new Error("useTheme must be used within a ThemeProvider");
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}
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return context;
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}
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