116 lines
2.6 KiB
PHP
116 lines
2.6 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\Command\Command;
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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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class HelperSet implements \IteratorAggregate
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{
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/**
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* @var Helper[]
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*/
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private $helpers = array();
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private $command;
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/**
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* Constructor.
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*
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* @param Helper[] $helpers An array of helper
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*/
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public function __construct(array $helpers = array())
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{
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foreach ($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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/**
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* Sets a helper.
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*
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* @param HelperInterface $helper The helper instance
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* @param string $alias An alias
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*/
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public function set(HelperInterface $helper, $alias = null)
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{
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$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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* @param string $name The helper name
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*
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* @return bool true if the helper is defined, false otherwise
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*/
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public function has($name)
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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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* @param string $name The helper name
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*
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* @return HelperInterface The helper instance
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*
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* @throws InvalidArgumentException if the helper is not defined
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*/
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public function get($name)
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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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/**
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* Sets the command associated with this helper set.
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*
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* @param Command $command A Command instance
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*/
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public function setCommand(Command $command = null)
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{
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$this->command = $command;
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}
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/**
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* Gets the command associated with this helper set.
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*
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* @return Command A Command instance
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*/
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public function getCommand()
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{
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return $this->command;
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}
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/**
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* @return Helper[]
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*/
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public function getIterator()
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{
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return new \ArrayIterator($this->helpers);
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}
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}
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