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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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/*
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 * This file is part of the Symfony package.
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 *
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 * (c) Fabien Potencier <fabien@symfony.com>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Symfony\Component\Console\Helper;
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use Symfony\Component\Console\Exception\InvalidArgumentException;
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/**
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 * HelperSet represents a set of helpers to be used with a command.
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 *
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 * @author Fabien Potencier <fabien@symfony.com>
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 *
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 * @implements \IteratorAggregate<string, HelperInterface>
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 */
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class HelperSet implements \IteratorAggregate
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{
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    /** @var array<string, HelperInterface> */
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    private array $helpers = [];
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    /**
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     * @param HelperInterface[] $helpers
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     */
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    public function __construct(array $helpers = [])
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    {
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        foreach ($helpers as $alias => $helper) {
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            $this->set($helper, \is_int($alias) ? null : $alias);
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        }
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    }
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    public function set(HelperInterface $helper, string $alias = null)
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    {
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        $this->helpers[$helper->getName()] = $helper;
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        if (null !== $alias) {
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            $this->helpers[$alias] = $helper;
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        }
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        $helper->setHelperSet($this);
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    }
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    /**
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     * Returns true if the helper if defined.
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     */
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    public function has(string $name): bool
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    {
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        return isset($this->helpers[$name]);
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    }
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    /**
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     * Gets a helper value.
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     *
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     * @throws InvalidArgumentException if the helper is not defined
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     */
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    public function get(string $name): HelperInterface
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    {
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        if (!$this->has($name)) {
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            throw new InvalidArgumentException(sprintf('The helper "%s" is not defined.', $name));
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        }
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        return $this->helpers[$name];
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    }
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    public function getIterator(): \Traversable
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    {
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        return new \ArrayIterator($this->helpers);
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    }
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}