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HelperSet.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Console\Helper;
013
014 use Symfony\Component\Console\Command\Command;
015 use Symfony\Component\Console\Exception\InvalidArgumentException;
016
017 /**
018 * HelperSet represents a set of helpers to be used with a command.
019 *
020 * @author Fabien Potencier <fabien@symfony.com>
021 */
022 class HelperSet implements \IteratorAggregate
023 {
024 /**
025 * @var Helper[]
026 */
027 private $helpers = array();
028 private $command;
029
030 /**
031 * Constructor.
032 *
033 * @param Helper[] $helpers An array of helper
034 */
035 public function __construct(array $helpers = array())
036 {
037 foreach ($helpers as $alias => $helper) {
038 $this->set($helper, is_int($alias) ? null : $alias);
039 }
040 }
041
042 /**
043 * Sets a helper.
044 *
045 * @param HelperInterface $helper The helper instance
046 * @param string $alias An alias
047 */
048 public function set(HelperInterface $helper, $alias = null)
049 {
050 $this->helpers[$helper->getName()] = $helper;
051 if (null !== $alias) {
052 $this->helpers[$alias] = $helper;
053 }
054
055 $helper->setHelperSet($this);
056 }
057
058 /**
059 * Returns true if the helper if defined.
060 *
061 * @param string $name The helper name
062 *
063 * @return bool true if the helper is defined, false otherwise
064 */
065 public function has($name)
066 {
067 return isset($this->helpers[$name]);
068 }
069
070 /**
071 * Gets a helper value.
072 *
073 * @param string $name The helper name
074 *
075 * @return HelperInterface The helper instance
076 *
077 * @throws InvalidArgumentException if the helper is not defined
078 */
079 public function get($name)
080 {
081 if (!$this->has($name)) {
082 throw new InvalidArgumentException(sprintf('The helper "%s" is not defined.', $name));
083 }
084
085 if ('dialog' === $name && $this->helpers[$name] instanceof DialogHelper) {
086 @trigger_error('"Symfony\Component\Console\Helper\DialogHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\QuestionHelper" instead.', E_USER_DEPRECATED);
087 } elseif ('progress' === $name && $this->helpers[$name] instanceof ProgressHelper) {
088 @trigger_error('"Symfony\Component\Console\Helper\ProgressHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\ProgressBar" instead.', E_USER_DEPRECATED);
089 } elseif ('table' === $name && $this->helpers[$name] instanceof TableHelper) {
090 @trigger_error('"Symfony\Component\Console\Helper\TableHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\Table" instead.', E_USER_DEPRECATED);
091 }
092
093 return $this->helpers[$name];
094 }
095
096 /**
097 * Sets the command associated with this helper set.
098 *
099 * @param Command $command A Command instance
100 */
101 public function setCommand(Command $command = null)
102 {
103 $this->command = $command;
104 }
105
106 /**
107 * Gets the command associated with this helper set.
108 *
109 * @return Command A Command instance
110 */
111 public function getCommand()
112 {
113 return $this->command;
114 }
115
116 /**
117 * @return Helper[]
118 */
119 public function getIterator()
120 {
121 return new \ArrayIterator($this->helpers);
122 }
123 }
124