75 lines
1.8 KiB
PHP
75 lines
1.8 KiB
PHP
<?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 $alias = null): void
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{
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$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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}
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