68 lines
2.0 KiB
TypeScript
68 lines
2.0 KiB
TypeScript
// Copyright 2017-2022 @polkadot/react-hooks authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { TFunction } from 'i18next';
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import type { ApiPromise } from '@polkadot/api';
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import type { Time } from '@polkadot/util/types';
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import { useMemo } from 'react';
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import { BN, BN_MAX_INTEGER, BN_ONE, bnMin, bnToBn, extractTime } from '@polkadot/util';
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import { createNamedHook } from './createNamedHook';
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import { useTranslation } from './translate';
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import { useBlockInterval } from './useBlockInterval';
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type Result = [number, string, Time];
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function calcResult (blockTime: BN, blocks: BN, t: TFunction): Result {
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// in the case of excessively large locks, limit to the max JS integer value
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const value = bnMin(BN_MAX_INTEGER, blockTime.mul(blocks)).toNumber();
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// time calculations are using the absolute value (< 0 detection only on strings)
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const time = extractTime(Math.abs(value));
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const { days, hours, minutes, seconds } = time;
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return [
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blockTime.toNumber(),
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`${value < 0 ? '+' : ''}${[
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days
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? (days > 1)
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? t<string>('{{days}} days', { replace: { days } })
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: t<string>('1 day')
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: null,
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hours
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? (hours > 1)
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? t<string>('{{hours}} hrs', { replace: { hours } })
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: t<string>('1 hr')
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: null,
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minutes
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? (minutes > 1)
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? t<string>('{{minutes}} mins', { replace: { minutes } })
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: t<string>('1 min')
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: null,
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seconds
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? (seconds > 1)
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? t<string>('{{seconds}} s', { replace: { seconds } })
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: t<string>('1 s')
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: null
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]
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.filter((s): s is string => !!s)
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.slice(0, 2)
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.join(' ')}`,
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time
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];
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}
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function useBlockTimeImpl (blocks: number | BN = BN_ONE, apiOverride?: ApiPromise | null): Result {
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const { t } = useTranslation();
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const blockTime = useBlockInterval(apiOverride);
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return useMemo(
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() => calcResult(blockTime, bnToBn(blocks), t),
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[blockTime, blocks, t]
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);
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}
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export const useBlockTime = createNamedHook('useBlockTime', useBlockTimeImpl);
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