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/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console\CommandLoader;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Exception\CommandNotFoundException;

/**
 * A simple command loader using factories to instantiate commands lazily.
 *
 * @author Maxime Steinhausser &lt;maxime.steinhausser@gmail.com&gt;
 */
class FactoryCommandLoader implements CommandLoaderInterface
{
    private array $factories;

    /**
     * @param callable[] $factories Indexed by command names
     */
    public function __construct(array $factories)
    {
        $this-&gt;factories = $factories;
    }

    public function has(string $name): bool
    {
        return isset($this-&gt;factories[$name]);
    }

    public function get(string $name): Command
    {
        if (!isset($this-&gt;factories[$name])) {
            throw new CommandNotFoundException(sprintf('Command &quot;%s&quot; does not exist.', $name));
        }

        $factory = $this-&gt;factories[$name];

        return $factory();
    }

    public function getNames(): array
    {
        return array_keys($this-&gt;factories);
    }
}
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