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import { useTheme } from 'next-themes';
import { FC } from 'react';
import { useIntl } from 'react-intl';
import { Moon, Sun } from '../../atoms';
import {
RadioGroup,
type RadioGroupCallback,
type RadioGroupCallbackProps,
type RadioGroupOption,
type RadioGroupProps,
} from './radio-group';
export type ThemeToggleProps = Pick<
RadioGroupProps,
'bodyClassName' | 'groupClassName' | 'legendClassName' | 'legendPosition'
>;
/**
* ThemeToggle component
*
* Render a Toggle component to set theme.
*/
export const ThemeToggle: FC<ThemeToggleProps> = (props) => {
const intl = useIntl();
const { resolvedTheme, setTheme } = useTheme();
const isDarkTheme = resolvedTheme === 'dark';
/**
* Update the theme.
*
* @param {string} theme - A theme name.
*/
const updateTheme = (theme: string) => {
setTheme(theme === 'light' ? 'light' : 'dark');
};
/**
* Handle change events.
*
* @param {RadioGroupCallbackProps} props - An object with choices.
*/
const handleChange: RadioGroupCallback = ({
choices,
updateChoice,
}: RadioGroupCallbackProps) => {
if (choices.new === choices.prev) {
const newTheme = choices.new === 'light' ? 'dark' : 'light';
updateChoice(newTheme);
updateTheme(newTheme);
} else {
updateTheme(choices.new);
}
};
const themeLabel = intl.formatMessage({
defaultMessage: 'Theme:',
description: 'ThemeToggle: theme label',
id: 'suXOBu',
});
const lightThemeLabel = intl.formatMessage({
defaultMessage: 'Light theme',
description: 'ThemeToggle: light theme label',
id: 'Ygea7s',
});
const darkThemeLabel = intl.formatMessage({
defaultMessage: 'Dark theme',
description: 'ThemeToggle: dark theme label',
id: '2QwvtS',
});
const options: RadioGroupOption[] = [
{
id: 'theme-light',
label: (
<>
<span className="screen-reader-text">{lightThemeLabel}</span>
<Sun />
</>
),
name: 'theme',
value: 'light',
},
{
id: 'theme-dark',
label: (
<>
<span className="screen-reader-text">{darkThemeLabel}</span>
<Moon />
</>
),
name: 'theme',
value: 'dark',
},
];
return (
<RadioGroup
{...props}
initialChoice={isDarkTheme ? 'dark' : 'light'}
kind="toggle"
legend={themeLabel}
onChange={handleChange}
options={options}
/>
);
};
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