33 lines
1.3 KiB
TypeScript
33 lines
1.3 KiB
TypeScript
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import { useEffect, useReducer } from 'react';
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import { MatrixEvent, Room, RoomMember, RoomMemberEvent } from 'matrix-js-sdk';
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import { Membership } from '../../types/matrix/room';
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import { useMatrixClient } from './useMatrixClient';
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import { readPowerLevel, usePowerLevelsContext } from './usePowerLevels';
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/**
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* Returns the list of members currently knocking on the room, reactively.
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* Returns an empty array if the current user lacks invite power level.
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*/
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export function usePendingKnocks(room: Room): RoomMember[] {
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const mx = useMatrixClient();
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const powerLevels = usePowerLevelsContext();
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const [, forceUpdate] = useReducer((n: number) => n + 1, 0);
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useEffect(() => {
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const handler = (_evt: MatrixEvent, member: RoomMember) => {
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if (member.roomId === room.roomId) forceUpdate();
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};
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mx.on(RoomMemberEvent.Membership, handler);
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return () => {
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mx.removeListener(RoomMemberEvent.Membership, handler);
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};
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}, [mx, room.roomId]);
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const myUserId = mx.getUserId();
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const myPowerLevel = readPowerLevel.user(powerLevels, myUserId ?? undefined);
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const invitePowerLevel = readPowerLevel.action(powerLevels, 'invite');
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const canApprove = myPowerLevel >= invitePowerLevel;
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return canApprove ? room.getMembersWithMembership(Membership.Knock) : [];
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}
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