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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * 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 <fabien@symfony.com>
 */
abstract class Input implements InputInterface, StreamableInputInterface
{
    protected
$definition;
    protected
$stream;
    protected
$options = [];
    protected
$arguments = [];
    protected
$interactive = true;

    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 = [];
       
$this->options = [];
       
$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(bool $interactive)
    {
       
$this->interactive = $interactive;
    }

   
/**
     * {@inheritdoc}
     */
   
public function getArguments()
    {
        return
array_merge($this->definition->getArgumentDefaults(), $this->arguments);
    }

   
/**
     * {@inheritdoc}
     */
   
public function getArgument(string $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(string $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(string $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(string $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(string $name)
    {
        return
$this->definition->hasOption($name);
    }

   
/**
     * Escapes a token through escapeshellarg if it contains unsafe chars.
     *
     * @return string
     */
   
public function escapeToken(string $token)
    {
        return
preg_match('{^[\w-]+$}', $token) ? $token : escapeshellarg($token);
    }

   
/**
     * {@inheritdoc}
     */
   
public function setStream($stream)
    {
       
$this->stream = $stream;
    }

   
/**
     * {@inheritdoc}
     */
   
public function getStream()
    {
        return
$this->stream;
    }
}