signal-desktop/ts/components/BadgeCarouselIndex.tsx

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2021-11-02 23:01:13 +00:00
// Copyright 2021 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import React from 'react';
import classNames from 'classnames';
import { times } from 'lodash';
import { strictAssert } from '../util/assert';
export function BadgeCarouselIndex({
currentIndex,
totalCount,
}: Readonly<{
currentIndex: number;
totalCount: number;
}>): JSX.Element | null {
strictAssert(totalCount >= 1, 'Expected 1 or more items');
strictAssert(
currentIndex < totalCount,
'Expected current index to be in range'
);
if (totalCount < 2) {
return null;
}
return (
<div aria-hidden className="BadgeCarouselIndex">
{times(totalCount, index => (
<div
key={index}
className={classNames(
'BadgeCarouselIndex__dot',
currentIndex === index && 'BadgeCarouselIndex__dot--selected'
)}
/>
))}
</div>
);
}