RocketChat/Rocket.Chat

import { api } from '@rocket.chat/core-services';
import type { SlashCommandCallbackParams } from '@rocket.chat/core-typings';
import { Users } from '@rocket.chat/models';
import { Random } from '@rocket.chat/random';

import { i18n } from '../../../server/lib/i18n';
import { createDirectMessage } from '../../../server/methods/createDirectMessage';
import { executeSendMessage } from '../../lib/server/methods/sendMessage';
import { settings } from '../../settings/server';
import { slashCommands } from '../../utils/server/slashCommand';

/*
 * Msg is a named function that will replace /msg commands
 */

slashCommands.add({
    command: 'msg',
    callback: async function Msg({ params, message: item, userId }: SlashCommandCallbackParams<'msg'>): Promise<void> {
        const trimmedParams = params.trim();
        const separator = trimmedParams.indexOf(' ');
        if (separator === -1) {
            void api.broadcast('notify.ephemeralMessage', userId, item.rid, {
                msg: i18n.t('Username_and_message_must_not_be_empty', { lng: settings.get('Language') || 'en' }),
            });
            return;
        }
        const message = trimmedParams.slice(separator + 1);
        const targetUsernameOrig = trimmedParams.slice(0, separator);
        const targetUsername = targetUsernameOrig.replace('@', '');
        const targetUser = await Users.findOneByUsernameIgnoringCase(targetUsername);
        if (targetUser == null) {
            const user = await Users.findOneById(userId, { projection: { language: 1 } });
            void api.broadcast('notify.ephemeralMessage', userId, item.rid, {
                msg: i18n.t('Username_doesnt_exist', {
                    postProcess: 'sprintf',
                    sprintf: [targetUsernameOrig],
                    lng: user?.language || settings.get('Language') || 'en',
                }),
            });
            return;
        }
        const { rid } = await createDirectMessage([targetUsername], userId);
        const msgObject = {
            _id: Random.id(),
            rid,
            msg: message,
        };
        await executeSendMessage(userId, msgObject);
    },
    options: {
        description: 'Direct_message_someone',
        params: '@username <message>',
        permission: 'create-d',
    },
});