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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\View\Asset\NotationResolver;
use Magento\Framework\View\Asset;
/**
* Variable resolver to allow specific placeholders in CSS files
*/
class Variable
{
/**
* Regex matching {{placeholders}}
*/
const VAR_REGEX = '/{{([_a-z]*)}}/si';
/**
* Provides the combined base url and base path from the asset context
*/
const VAR_BASE_URL_PATH = 'base_url_path';
/**
* @var \Magento\Framework\View\Asset\Repository
*/
private $assetRepo;
/**
* @param Asset\Repository $assetRepo
*/
public function __construct(Asset\Repository $assetRepo)
{
$this->assetRepo = $assetRepo;
}
/**
* Replaces the placeholder variables into the given path
*
* @param string $path
* @return string
*/
public function convertVariableNotation($path)
{
$matches = [];
if (preg_match_all(self::VAR_REGEX, $path, $matches, PREG_SET_ORDER)) {
$replacements = [];
foreach ($matches as $match) {
if (!isset($replacements[$match[0]])) {
$replacements[$match[0]] = $this->getPlaceholderValue($match[1]);
}
}
$path = str_replace(array_keys($replacements), $replacements, $path);
}
return $path;
}
/**
* Process placeholder
*
* @param string $placeholder
* @return string
*/
public function getPlaceholderValue($placeholder)
{
/** @var \Magento\Framework\View\Asset\File\FallbackContext $context */
$context = $this->assetRepo->getStaticViewFileContext();
switch ($placeholder) {
case self::VAR_BASE_URL_PATH:
return '{{' . self::VAR_BASE_URL_PATH . '}}' . $context->getAreaCode() .
($context->getThemePath() ? '/' . $context->getThemePath() . '/' : '') .
'{{locale}}';
default:
return '';
}
}
}