cal.pub0.org/packages/lib/hooks/useTheme.tsx

43 lines
1.8 KiB
TypeScript

import { useTheme as useNextTheme } from "next-themes";
import { useEffect } from "react";
import { useEmbedTheme } from "@calcom/embed-core/embed-iframe";
import type { Maybe } from "@calcom/trpc/server";
/**
* It should be called once per route and only if you want to use app configured theme. System only theme works automatically by using ThemeProvider
* Calling it without a theme will just returns the current theme.
* It handles embed configured theme as well.
*/
export default function useTheme(themeToSet?: Maybe<string>) {
const { resolvedTheme, setTheme, forcedTheme, theme: activeTheme } = useNextTheme();
const embedTheme = useEmbedTheme();
useEffect(() => {
// If themeToSet is not provided the app intends to not apply a specific theme
if (!themeToSet) {
// But if embedTheme is set then the Embed API intends to apply that theme or it wants "system" theme which is the default
setTheme(embedTheme || "system");
return;
}
// Embed theme takes precedence over theme configured in app.
// If embedTheme isn't set i.e. it's not explicitly configured with a theme, then it would use the theme configured in appearance.
// If embedTheme is set to "auto" then we consider it as null which then uses system theme.
const finalThemeToSet = embedTheme ? (embedTheme === "auto" ? null : embedTheme) : themeToSet;
if (!finalThemeToSet || finalThemeToSet === activeTheme) return;
setTheme(finalThemeToSet);
// We must not add `activeTheme` to the dependency list as it can cause an infinite loop b/w dark and theme switches
// because there might be another booking page with conflicting theme.
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [themeToSet, setTheme, embedTheme]);
return {
resolvedTheme,
setTheme,
forcedTheme,
activeTheme,
};
}