Rocket.Chat/apps/meteor/app/lib/server/methods/getUserRoles.ts

import { Meteor } from 'meteor/meteor';
import { Authorization } from '@rocket.chat/core-services';
import type { ServerMethods } from '@rocket.chat/ui-contexts';
import type { IUser, IRocketChatRecord } from '@rocket.chat/core-typings';

declare module '@rocket.chat/ui-contexts' {
	// eslint-disable-next-line @typescript-eslint/naming-convention
	interface ServerMethods {
		getUserRoles(): (IRocketChatRecord & Pick<IUser, '_id' | 'roles' | 'username'>)[];
	}
}

Meteor.methods<ServerMethods>({
	async getUserRoles() {
		if (!Meteor.userId()) {
			throw new Meteor.Error('error-invalid-user', 'Invalid user', { method: 'getUserRoles' });
		}

		return Authorization.getUsersFromPublicRoles();
	},
});