simple-updates-bot.js

const { VK } = require('vk-io');
const { HearManager } = require('@vk-io/hear');

const vk = new VK({
    token: process.env.TOKEN,
});

const hearManager = new HearManager();

vk.updates.on('message_new', hearManager.middleware);

hearManager.hear('/start', async context => {
    await context.send(`
        My commands list

        /cat - Cat photo
        /purr - Cat purring
        /time - The current date
        /reverse - Reverse text
    `);
});

hearManager.hear('/cat', async context => {
    await Promise.all([
        context.send('Wait for the uploads awesome 😻'),

        context.sendPhotos({
            value: 'https://loremflickr.com/400/300/',
        }),
    ]);
});

hearManager.hear(['/time', '/date'], async context => {
    await context.send(String(new Date()));
});

hearManager.hear(/^\/reverse (.+)/i, async context => {
    await context.send(context.$match[1].split('').reverse().join(''));
});

const catsPurring = [
    'http://ronsen.org/purrfectsounds/purrs/trip.mp3',
    'http://ronsen.org/purrfectsounds/purrs/maja.mp3',
    'http://ronsen.org/purrfectsounds/purrs/chicken.mp3',
];

hearManager.hear('/purr', async context => {
    const link = catsPurring[Math.floor(Math.random() * catsPurring.length)];

    await Promise.all([
        context.send('Wait for the uploads purring 😻'),

        context.sendAudioMessage({
            value: link,
        }),
    ]);
});

vk.updates.start().catch(console.error);