43 lines
1004 B
TypeScript
43 lines
1004 B
TypeScript
// Copyright 2017-2021 @polkadot/react-query authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type BN from 'bn.js';
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import type { Moment } from '@polkadot/types/interfaces';
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import React, { useEffect, useState } from 'react';
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import { useApi, useCall } from '@polkadot/react-hooks';
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import Elapsed from './Elapsed';
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interface Props {
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children?: React.ReactNode;
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className?: string;
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label?: React.ReactNode;
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value?: Moment;
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}
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function TimeNow ({ children, className = '', label, value }: Props): React.ReactElement<Props> | null {
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const { api } = useApi();
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const timestamp = useCall<Moment>(!value && api.query.timestamp?.now);
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const [now, setNow] = useState<BN | undefined>();
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useEffect((): void => {
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setNow(value || timestamp);
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}, [timestamp, value]);
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if (!now) {
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return null;
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}
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return (
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<div className={className}>
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{label || ''}
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<Elapsed value={now} />
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{children}
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</div>
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);
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}
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export default React.memo(TimeNow);
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