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import React, { createContext, useCallback, useContext, useEffect, useState } from "react";
import { Theme, ThemeProvider } from "@mui/material";
import { LocalStorageThemeName } from "@constants/LocalStorage";
import { localStorageAvailable } from "@services/LocalStorage";
import * as themes from "@themes/index";
import { getTheme } from "@utils/Configuration";
const MediaQueryDarkMode = "(prefers-color-scheme: dark)";
export const ThemeContext = createContext<ValueProps | null>(null);
export interface Props {
children: React.ReactNode;
}
export interface ValueProps {
theme: Theme;
themeName: string;
setThemeName: (value: string) => void;
}
export default function ThemeContextProvider(props: Props) {
const [theme, setTheme] = useState(GetCurrentTheme());
const [themeName, setThemeName] = useState(GetCurrentThemeName());
const isLocalStorageAvailable = localStorageAvailable();
useEffect(() => {
if (themeName === themes.ThemeNameAuto) {
const query = window.matchMedia(MediaQueryDarkMode);
if (query.addEventListener) {
query.addEventListener("change", mediaQueryListener);
return () => {
query.removeEventListener("change", mediaQueryListener);
};
}
}
setTheme(ThemeFromName(themeName));
}, [themeName]);
useEffect(() => {
window.addEventListener("storage", storageListener);
return () => {
window.removeEventListener("storage", storageListener);
};
}, []);
const storageListener = (ev: StorageEvent): any => {
if (ev.key !== LocalStorageThemeName) {
return;
}
if (ev.newValue && ev.newValue !== "") {
setThemeName(ev.newValue);
} else {
setThemeName(getUserThemeName());
}
};
const mediaQueryListener = (ev: MediaQueryListEvent) => {
setTheme(ev.matches ? themes.Dark : themes.Light);
};
const callback = useCallback(
(name: string) => {
setThemeName(name);
if (isLocalStorageAvailable) {
window.localStorage.setItem(LocalStorageThemeName, name);
}
},
[isLocalStorageAvailable],
);
return (
<ThemeContext.Provider
value={{
theme,
themeName,
setThemeName: callback,
}}
>
<ThemeWrapper>{props.children}</ThemeWrapper>
</ThemeContext.Provider>
);
}
export function useThemeContext() {
const context = useContext(ThemeContext);
if (!context) {
throw new Error("useThemeContext must be used within a ThemeContextProvider");
}
return context;
}
function ThemeWrapper(props: Props) {
const { theme } = useThemeContext();
return <ThemeProvider theme={theme}>{props.children}</ThemeProvider>;
}
function GetCurrentThemeName() {
if (localStorageAvailable()) {
const local = window.localStorage.getItem(LocalStorageThemeName);
if (local) {
return local;
}
}
return getTheme();
}
function GetCurrentTheme() {
return ThemeFromName(GetCurrentThemeName());
}
function ThemeFromName(name: string) {
switch (name) {
case themes.ThemeNameLight:
return themes.Light;
case themes.ThemeNameDark:
return themes.Dark;
case themes.ThemeNameGrey:
return themes.Grey;
case themes.ThemeNameAuto:
return window.matchMedia(MediaQueryDarkMode).matches ? themes.Dark : themes.Light;
default:
return window.matchMedia(MediaQueryDarkMode).matches ? themes.Dark : themes.Light;
}
}
const getUserThemeName = () => {
if (localStorageAvailable()) {
const value = window.localStorage.getItem(LocalStorageThemeName);
if (value) {
return value;
}
}
return getTheme();
};
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