MugAlertCommand.php

MugAlertCommand.php

<?php

namespace App\Command;

use Psr\Log\LoggerInterface;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\DomCrawler\Crawler;
use Symfony\Component\Mailer\MailerInterface;
use Symfony\Component\Mime\Email;
use Symfony\Component\Notifier\Message\SmsMessage;
use Symfony\Component\Notifier\TexterInterface;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use function Symfony\Component\String\u;

class MugAlertCommand extends Command
{
    protected static $defaultName = 'app:mug-alert';
    private HttpClientInterface $httpClient;
    private TexterInterface $texter;
    private MailerInterface $mailer;
    private LoggerInterface $logger;

    public function __construct(HttpClientInterface $httpClient, TexterInterface $texter, MailerInterface $mailer, LoggerInterface $logger)
    {
        $this->httpClient = $httpClient;        
        $this->texter = $texter;
        $this->mailer = $mailer;
        $this->logger = $logger;
        parent::__construct();
    }

    protected function configure()
    {
        $this->setDescription('Mug alert');
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        if ($this->crawlIsMugInStock()) {
            // send alerts!
            $message = \sprintf('Mug Noel dispo ! (%s)', \date('Y-m-d H:i:s'));

            $this->sendSms($message); // to me
            $this->sendMail($message); // to her
        }

        return Command::SUCCESS;
    }

    // use first the HttpClient to get the HTML
    // then the DomCrawler to get the proper id element and its text content
    // finaly check the wording to decide if it is ok|ko
    private function crawlIsMugInStock(): bool
    {
        $response = $this->httpClient->request(
            'GET',
            'https://foobar.myshopify.com/products/product?variant=123'
        );

        if (200 !== $statusCode = $response->getStatusCode()) {
            // handle failure via log and alert
            $this->logger->error('Status code KO', ['status_code' => $statusCode]);
            $this->sendSms(\sprintf('Status code KO (%s)', $statusCode));

            return false;
        }

        $crawler = new Crawler($response->getContent());
        $selector = $crawler->filter('#ProductSelect-product-template'); // the element inside the page
        $soldOut = u($selector->text())->lower()->containsAny('épuisé'); // "épuisé" means sold out

        return !$soldOut;
    }

    // use the Texter Notifier configured with FreeMobile (SMS) to send an SMS
    private function sendSms(string $message): void
    {
        $this->texter->send(new SmsMessage('0102030405', $message));
    }

    // use the Mailer to send a raw mail
    private function sendMail(string $message): void
    {
        $email = (new Email())
            ->from('email@me.com')
            ->to('email@me.com')
            ->subject($message)
            ->text($message);

        $this->mailer->send($email);
    }
}