<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\View\Asset;

use Magento\Framework\App\Filesystem\DirectoryList;
use Magento\Framework\Filesystem;
use Magento\Framework\View\DesignInterface;

/**
* Class RepositoryMap
*/
class RepositoryMap
{
/**
* Name of package map file
*
* Map file contains list of files which are missed in current package,
* so inherited from one of the ancestor packages
*
* @var string
*/
const MAP_NAME = 'map.json';

/**
* Name of package result map file
*
* Result map contains list of all package files (own and inherited from ancestors)
*
* @var string
*/
const RESULT_MAP_NAME = 'result_map.json';

/**
* Name of package result map file
*
* Result map contains list of all package files (own and inherited from ancestors)
*
* @var string
*/
const REQUIRE_JS_MAP_NAME = 'requirejs-map.js';

/**
* @var DesignInterface
*/
private $design;

/**
* @var Filesystem
*/
private $filesystem;

/**
* @var array
*/
private $maps = [];

/**
* RepositoryMap constructor.
* @param DesignInterface $design
* @param Filesystem $filesystem
*/
public function __construct(DesignInterface $design, Filesystem $filesystem)
{
$this->design = $design;
$this->filesystem = $filesystem;
}

/**
* @param string $fileId
* @param array $params
* @return array
*/
public function getMap($fileId, array $params)
{
$area = $params['area'];
$locale = $params['locale'];
$themePath = isset($params['theme']) ? $params['theme'] : $this->design->getThemePath($params['themeModel']);

$path = "$area/$themePath/$locale/" . self::MAP_NAME;
if (!isset($this->maps[$path])) {
$this->maps[$path] = [];
/** @var Filesystem $filesystem */
$staticDir = $this->filesystem->getDirectoryRead(DirectoryList::STATIC_VIEW);
if ($staticDir->isFile($path)) {
$map = $staticDir->readFile($path);
if ($map) {
$this->maps[$path] = json_decode($map, true);
}
}
}

if (isset($this->maps[$path][$fileId])) {
return $this->maps[$path][$fileId];
}
return [];
}
}