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<?php
 /*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
 
 namespace Symfony\Component\Console\Input;
 
 use Symfony\Component\Console\Exception\InvalidArgumentException;
 use Symfony\Component\Console\Exception\RuntimeException;
 
 /**
 * Input is the base class for all concrete Input classes.
 *
 * Three concrete classes are provided by default:
 *
 *  * `ArgvInput`: The input comes from the CLI arguments (argv)
 *  * `StringInput`: The input is provided as a string
 *  * `ArrayInput`: The input is provided as an array
 *
 * @author Fabien Potencier <[email protected]>
 */
 abstract class Input implements InputInterface, StreamableInputInterface
 {
 /**
 * @var InputDefinition
 */
 protected $definition;
 protected $stream;
 protected $options = array();
 protected $arguments = array();
 protected $interactive = true;
 
 /**
 * Constructor.
 *
 * @param InputDefinition|null $definition A InputDefinition instance
 */
 public function __construct(InputDefinition $definition = null)
 {
 if (null === $definition) {
 $this->definition = new InputDefinition();
 } else {
 $this->bind($definition);
 $this->validate();
 }
 }
 
 /**
 * {@inheritdoc}
 */
 public function bind(InputDefinition $definition)
 {
 $this->arguments = array();
 $this->options = array();
 $this->definition = $definition;
 
 $this->parse();
 }
 
 /**
 * Processes command line arguments.
 */
 abstract protected function parse();
 
 /**
 * {@inheritdoc}
 */
 public function validate()
 {
 $definition = $this->definition;
 $givenArguments = $this->arguments;
 
 $missingArguments = array_filter(array_keys($definition->getArguments()), function ($argument) use ($definition, $givenArguments) {
 return !array_key_exists($argument, $givenArguments) && $definition->getArgument($argument)->isRequired();
 });
 
 if (count($missingArguments) > 0) {
 throw new RuntimeException(sprintf('Not enough arguments (missing: "%s").', implode(', ', $missingArguments)));
 }
 }
 
 /**
 * {@inheritdoc}
 */
 public function isInteractive()
 {
 return $this->interactive;
 }
 
 /**
 * {@inheritdoc}
 */
 public function setInteractive($interactive)
 {
 $this->interactive = (bool) $interactive;
 }
 
 /**
 * {@inheritdoc}
 */
 public function getArguments()
 {
 return array_merge($this->definition->getArgumentDefaults(), $this->arguments);
 }
 
 /**
 * {@inheritdoc}
 */
 public function getArgument($name)
 {
 if (!$this->definition->hasArgument($name)) {
 throw new InvalidArgumentException(sprintf('The "%s" argument does not exist.', $name));
 }
 
 return isset($this->arguments[$name]) ? $this->arguments[$name] : $this->definition->getArgument($name)->getDefault();
 }
 
 /**
 * {@inheritdoc}
 */
 public function setArgument($name, $value)
 {
 if (!$this->definition->hasArgument($name)) {
 throw new InvalidArgumentException(sprintf('The "%s" argument does not exist.', $name));
 }
 
 $this->arguments[$name] = $value;
 }
 
 /**
 * {@inheritdoc}
 */
 public function hasArgument($name)
 {
 return $this->definition->hasArgument($name);
 }
 
 /**
 * {@inheritdoc}
 */
 public function getOptions()
 {
 return array_merge($this->definition->getOptionDefaults(), $this->options);
 }
 
 /**
 * {@inheritdoc}
 */
 public function getOption($name)
 {
 if (!$this->definition->hasOption($name)) {
 throw new InvalidArgumentException(sprintf('The "%s" option does not exist.', $name));
 }
 
 return array_key_exists($name, $this->options) ? $this->options[$name] : $this->definition->getOption($name)->getDefault();
 }
 
 /**
 * {@inheritdoc}
 */
 public function setOption($name, $value)
 {
 if (!$this->definition->hasOption($name)) {
 throw new InvalidArgumentException(sprintf('The "%s" option does not exist.', $name));
 }
 
 $this->options[$name] = $value;
 }
 
 /**
 * {@inheritdoc}
 */
 public function hasOption($name)
 {
 return $this->definition->hasOption($name);
 }
 
 /**
 * Escapes a token through escapeshellarg if it contains unsafe chars.
 *
 * @param string $token
 *
 * @return string
 */
 public function escapeToken($token)
 {
 return preg_match('{^[\w-]+$}', $token) ? $token : escapeshellarg($token);
 }
 
 /**
 * {@inheritdoc}
 */
 public function setStream($stream)
 {
 $this->stream = $stream;
 }
 
 /**
 * {@inheritdoc}
 */
 public function getStream()
 {
 return $this->stream;
 }
 }
 
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