RocketChat/Rocket.Chat

import { Apps, AppEvents } from '@rocket.chat/apps';
import type { IUser } from '@rocket.chat/core-typings';
import { Users } from '@rocket.chat/models';
import type { ServerMethods } from '@rocket.chat/ui-contexts';
import { check } from 'meteor/check';
import { Meteor } from 'meteor/meteor';

import { hasPermissionAsync } from '../../app/authorization/server/functions/hasPermission';
import { deleteUser } from '../../app/lib/server/functions/deleteUser';

declare module '@rocket.chat/ui-contexts' {
    // eslint-disable-next-line @typescript-eslint/naming-convention
    interface ServerMethods {
        deleteUser(userId: IUser['_id'], confirmRelinquish?: boolean): boolean;
    }
}

Meteor.methods<ServerMethods>({
    async deleteUser(userId, confirmRelinquish = false) {
        check(userId, String);
        const uid = Meteor.userId();
        if (!uid || (await hasPermissionAsync(uid, 'delete-user')) !== true) {
            throw new Meteor.Error('error-not-allowed', 'Not allowed', {
                method: 'deleteUser',
            });
        }

        const user = await Users.findOneById(userId);
        if (!user) {
            throw new Meteor.Error('error-invalid-user', 'Invalid user to delete', {
                method: 'deleteUser',
            });
        }

        if (user.type === 'app') {
            throw new Meteor.Error('error-cannot-delete-app-user', 'Deleting app user is not allowed', {
                method: 'deleteUser',
            });
        }

        const adminCount = await Users.col.countDocuments({ roles: 'admin' });

        const userIsAdmin = user.roles?.indexOf('admin') > -1;

        if (adminCount === 1 && userIsAdmin) {
            throw new Meteor.Error('error-action-not-allowed', 'Leaving the app without admins is not allowed', {
                method: 'deleteUser',
                action: 'Remove_last_admin',
            });
        }

        await deleteUser(userId, confirmRelinquish, uid);

        // App IPostUserDeleted event hook
        await Apps.self?.triggerEvent(AppEvents.IPostUserDeleted, { user, performedBy: await Meteor.userAsync() });

        return true;
    },
});