RocketChat/Rocket.Chat

import type { IRoom, IUser } from '@rocket.chat/core-typings';
import { useCallback } from 'react';

import { RoomRoles, UserRoles, Roles } from '../../../../../app/models/client';
import { useReactiveValue } from '../../../../hooks/useReactiveValue';

export const useMessageRoles = (userId: IUser['_id'] | undefined, roomId: IRoom['_id'], shouldLoadRoles: boolean): Array<string> =>
    useReactiveValue(
        useCallback(() => {
            if (!shouldLoadRoles || !userId) {
                return [];
            }

            const userRoles = UserRoles.findOne(userId);
            const roomRoles = RoomRoles.findOne({
                'u._id': userId,
                'rid': roomId,
            });

            const roles = [...(userRoles?.roles || []), ...(roomRoles?.roles || [])];

            const result = Roles.find(
                {
                    _id: {
                        $in: roles,
                    },
                    description: {
                        $exists: true,
                        $ne: '',
                    },
                },
                {
                    fields: {
                        description: 1,
                    },
                },
            ).fetch();
            return result.map(({ description }) => description);
        }, [userId, roomId, shouldLoadRoles]),
    );