HelperSet.php

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<?php
 
namespace Symfony\Component\Console\Helper;
 
use Symfony\Component\Console\Command\Command;
 
/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */
 
class HelperSet
{
    protected $helpers;
    protected $command;
 
    public function __construct(array $helpers = array())
    {
        $this->helpers = array();
        foreach ($helpers as $alias => $helper) {
            $this->set($helper, is_int($alias) ? null : $alias);
        }
    }
 
    public function set(HelperInterface $helper, $alias = null)
    {
        $this->helpers[$helper->getName()] = $helper;
        if (null !== $alias) {
            $this->helpers[$alias] = $helper;
        }
 
        $helper->setHelperSet($this);
    }
 
    public function has($name)
    {
        return isset($this->helpers[$name]);
    }
 
    public function get($name)
    {
        if (!$this->has($name)) {
            throw new \InvalidArgumentException(sprintf('The helper "%s" is not defined.', $name));
        }
 
        return $this->helpers[$name];
    }
 
    public function setCommand(Command $command = null)
    {
        $this->command = $command;
    }
 
    public function getCommand()
    {
        return $this->command;
    }
}