53 lines
1.5 KiB
TypeScript
53 lines
1.5 KiB
TypeScript
// Copyright 2017-2022 @polkadot/app-preimages authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { Option } from '@polkadot/types';
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import type { AccountId32 } from '@polkadot/types/interfaces';
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import type { PalletRankedCollectiveMemberRecord } from '@polkadot/types/lookup';
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import type { Member, PalletColl } from './types';
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import { useMemo } from 'react';
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import { createNamedHook, useApi, useCall } from '@polkadot/react-hooks';
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import useMembersIds from './useMemberIds';
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interface Result {
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memberIds: string[];
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members: Member[];
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}
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const OPT_MEM = {
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transform: ([[ids], infos]: [[AccountId32[]], Option<PalletRankedCollectiveMemberRecord>[]]): Result => {
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const members = infos
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.map((info, i) => [info.unwrapOr(null), ids[i]])
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.filter((r): r is [PalletRankedCollectiveMemberRecord, AccountId32] => !!r[0])
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.map(([info, accountId]): Member => ({
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accountId: accountId.toString(),
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info
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}));
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const memberIds = members.map(({ accountId }) => accountId);
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return {
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memberIds,
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members
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};
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},
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withParamsTransform: true
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};
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function useMembersImpl (collective: PalletColl): Result | undefined {
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const { api } = useApi();
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const ids = useMembersIds(collective);
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const result = useCall(ids && ids.length !== 0 && api.query[collective].members.multi, [ids], OPT_MEM);
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return useMemo(
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() => ids && ids.length === 0
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? { memberIds: [], members: [] }
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: result,
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[ids, result]
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);
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}
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export default createNamedHook('useMembers', useMembersImpl);
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