shlink-web-client/src/settings/UserInterface.tsx

import { FC } from 'react';
import { SimpleCard } from '../utils/SimpleCard';
import ToggleSwitch from '../utils/ToggleSwitch';
import { changeThemeInMarkup, Theme } from '../utils/theme';
import { Settings, UiSettings } from './reducers/settings';

interface UserInterfaceProps {
  settings: Settings;
  setUiSettings: (settings: UiSettings) => void;
}

export const UserInterface: FC<UserInterfaceProps> = ({ settings: { ui }, setUiSettings }) => (
  <SimpleCard title="User interface">
    <ToggleSwitch
      checked={ui?.theme === 'dark'}
      onChange={(useDarkTheme) => {
        const theme: Theme = useDarkTheme ? 'dark' : 'light';

        setUiSettings({ theme });
        changeThemeInMarkup(theme);
      }}
    >
      Use dark theme
    </ToggleSwitch>
  </SimpleCard>
);