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<?php |
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|
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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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|
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namespace Symfony\Component\Console\Helper; |
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|
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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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/** |
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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 = []; |
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private $command; |
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|
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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 $helpers = []) |
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{ |
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foreach ($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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/** |
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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] = $helper; |
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} |
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|
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$helper->setHelperSet($this); |
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} |
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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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/** |
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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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|
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return $this->helpers[$name]; |
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} |
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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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/** |
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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 $this->command; |
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} |
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|
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/** |
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* @return Helper[] |
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*/ |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->helpers); |
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} |
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} |
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|
