php__symfony__book/src/Command/AppCommand.php

<?php

namespace App\Command;


use Osinet\DemoBundle\Command\DemoCommand;
use Osinet\DemoBundle\Lucky;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\NullOutput;
use Symfony\Component\Console\Output\OutputInterface;

class AppCommand extends Command {
  const O_DELEGATE = 'delegate';

  /**
   * @var \Osinet\DemoBundle\Lucky
   */
  protected $lucky;

  public function __construct(Lucky $lucky, ?string $name = NULL) {
    $this->lucky = $lucky;
    parent::__construct($name);
  }

  /**
   * {@inheritdoc}
   *
   * Nothing in parent, so don't call it.
   */
  protected function configure() {
    $this->setName('app:lucky')
      ->setDescription('Draws a lucky number')
      ->setHelp('Draws a pseudo-random number, or returns the one you pass')
      ->addOption(static::O_DELEGATE, 'd', InputOption::VALUE_NONE, 'Delegate to demo bundle command');
  }

  protected function execute(InputInterface $input, OutputInterface $output) {
    // Delegate to bundle commande.
    if ($input->getOption(static::O_DELEGATE)) {
      $bundleCommand = $this->getApplication()->find(DemoCommand::NAME);
      $arguments = [];
      $commandInput = new ArrayInput($arguments);
      $commandOutput = new NullOutput();
      // Pass no options/arguments, mask commmand output.
      $value = $bundleCommand->run($commandInput, $commandOutput);
    }
    // Perform value selection directly.
    else {
      $value = $this->lucky->number();
    }

    $output->writeln($value);
  }
}