57 lines
1.3 KiB
TypeScript
57 lines
1.3 KiB
TypeScript
// Copyright 2017-2022 @polkadot/react-components authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Stats } from './types';
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import { useCallback, useEffect, useRef, useState } from 'react';
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import { createNamedHook, useApi } from '@polkadot/react-hooks';
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const MAX_NUM = 60; // 5 minutes
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const INTERVAL = 5_000;
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function useApiStatsImpl (): Stats[] {
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const { api, getStats } = useApi();
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const [stats, setStats] = useState<Stats[]>([]);
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const timerId = useRef<NodeJS.Timeout | null>(null);
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const fireTimer = useCallback(
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(): void => {
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timerId.current = null;
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const [stats, when] = getStats(api);
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setStats((prev): Stats[] => {
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const curr = {
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stats,
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when
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};
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if (prev.length === 0) {
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return [curr];
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}
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return prev.length === MAX_NUM
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? prev.concat(curr).slice(-MAX_NUM)
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: prev.concat(curr);
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});
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timerId.current = setTimeout(() => fireTimer(), INTERVAL);
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},
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[api, getStats, timerId]
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);
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useEffect((): () => void => {
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fireTimer();
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return (): void => {
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timerId.current && clearTimeout(timerId.current);
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};
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, []);
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return stats;
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}
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export default createNamedHook('useApiStats', useApiStatsImpl);
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