<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/

namespace Magento\Framework\View\Asset\PreProcessor;

use Magento\Framework\View\Asset\LocalInterface;

/**
* An object that's passed to preprocessors to carry current and original information for processing
* Encapsulates complexity of all necessary context and parameters
*
* @api
* @since 100.0.2
*/
class Chain
{
/**
* @var array
*/
private $compatibleTypes;

/**
* @var LocalInterface
*/
private $asset;

/**
* @var string
*/
private $origContent;

/**
* @var string
*/
protected $origContentType;

/**
* @var string
*/
private $content;

/**
* @var string
*/
private $contentType;

/**
* @var string
*/
protected $targetContentType;

/**
* @var null|string
*/
protected $targetAssetPath;

/**
* @var string
*/
protected $origAssetPath;

/**
* @param LocalInterface $asset
* @param string $origContent
* @param string $origContentType
* @param string $origAssetPath
* @param array $compatibleTypes
*/
public function __construct(
LocalInterface $asset,
$origContent,
$origContentType,
$origAssetPath,
array $compatibleTypes = []
) {
$this->asset = $asset;
$this->origContent = $origContent;
$this->content = $origContent;
$this->origContentType = $origContentType;
$this->contentType = $origContentType;
$this->targetContentType = $asset->getContentType();
$this->targetAssetPath = $asset->getPath();
$this->origAssetPath = $origAssetPath;
$this->compatibleTypes = $compatibleTypes;
}

/**
* Get asset object
*
* @return LocalInterface
*/
public function getAsset()
{
return $this->asset;
}

/**
* Get original content
*
* @return string
*/
public function getOrigContent()
{
return $this->origContent;
}

/**
* Get current content
*
* @return string
*/
public function getContent()
{
return $this->content;
}

/**
* Set current content
*
* @param string $content
* @return void
*/
public function setContent($content)
{
$this->content = $content;
}

/**
* Get original content type
*
* @return string
*/
public function getOrigContentType()
{
return $this->origContentType;
}

/**
* Get current content type
*
* @return string
*/
public function getContentType()
{
return $this->contentType;
}

/**
* Set current content type
*
* @param string $contentType
* @return void
*/
public function setContentType($contentType)
{
$this->contentType = $contentType;
}

/**
* Get the intended content type
*
* @return string
*/
public function getTargetContentType()
{
return $this->targetContentType;
}

/**
* Get the target asset path
*
* @return string
*/
public function getTargetAssetPath()
{
return $this->targetAssetPath;
}

/**
* Assert invariants
*
* Impose an integrity check to avoid generating mismatching content type and not leaving transient data behind
*
* @return void
* @throws \LogicException
*/
public function assertValid()
{
if ($this->contentType !== $this->targetContentType
&& empty($this->compatibleTypes[$this->targetContentType][$this->contentType])) {
throw new \LogicException(
"The requested asset type was '{$this->targetContentType}', but ended up with '{$this->contentType}'"
);
}
}

/**
* Whether the contents or type have changed during the lifetime of the object
*
* @return bool
*/
public function isChanged()
{
return $this->origContentType != $this->contentType || $this->origContent != $this->content;
}

/**
* @return string
* @codeCoverageIgnore
*/
public function getOrigAssetPath()
{
return $this->origAssetPath;
}
}