finfollow/src/Command/FetchEmailsCommand.php

<?php

namespace App\Command;

use App\Service\MailFetcher;
use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

#[AsCommand(
    name: 'app:fetch-emails',
    description: 'Fetch emails and process them',
)]
class FetchEmailsCommand extends Command
{
    private MailFetcher $mailFetcher;

    public function __construct(MailFetcher $mailFetcher)
    {
        parent::__construct();
        $this->mailFetcher = $mailFetcher;
    }

    protected function configure(): void
    {
        $this
            ->addArgument('arg1', InputArgument::OPTIONAL, 'Argument description')
            ->addOption('option1', null, InputOption::VALUE_NONE, 'Option description');
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);
        $arg1 = $input->getArgument('arg1');

        if ($arg1) {
            $io->note(sprintf('You passed an argument: %s', $arg1));
        }

        if ($input->getOption('option1')) {
            // ...
        }

        $this->mailFetcher->fetchNewEmails();


        $io->success('You have a new command! Now make it your own! Pass --help to see your options.');

        return Command::SUCCESS;
    }
}