<?php

/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Composer\IO;

/**
* IOInterface that is not interactive and never writes the output
*
* @author Christophe Coevoet <stof@notk.org>
*/
class NullIO extends BaseIO
{
/**
* {@inheritDoc}
*/
public function isInteractive()
{
return false;
}

/**
* {@inheritDoc}
*/
public function isVerbose()
{
return false;
}

/**
* {@inheritDoc}
*/
public function isVeryVerbose()
{
return false;
}

/**
* {@inheritDoc}
*/
public function isDebug()
{
return false;
}

/**
* {@inheritDoc}
*/
public function isDecorated()
{
return false;
}

/**
* {@inheritDoc}
*/
public function write($messages, $newline = true, $verbosity = self::NORMAL)
{
}

/**
* {@inheritDoc}
*/
public function writeError($messages, $newline = true, $verbosity = self::NORMAL)
{
}

/**
* {@inheritDoc}
*/
public function overwrite($messages, $newline = true, $size = 80, $verbosity = self::NORMAL)
{
}

/**
* {@inheritDoc}
*/
public function overwriteError($messages, $newline = true, $size = 80, $verbosity = self::NORMAL)
{
}

/**
* {@inheritDoc}
*/
public function ask($question, $default = null)
{
return $default;
}

/**
* {@inheritDoc}
*/
public function askConfirmation($question, $default = true)
{
return $default;
}

/**
* {@inheritDoc}
*/
public function askAndValidate($question, $validator, $attempts = false, $default = null)
{
return $default;
}

/**
* {@inheritDoc}
*/
public function askAndHideAnswer($question)
{
return null;
}

/**
* {@inheritDoc}
*/
public function select($question, $choices, $default, $attempts = false, $errorMessage = 'Value "%s" is invalid', $multiselect = false)
{
return $default;
}
}