<?php

namespace Psalm\Internal\LanguageServer\Provider;

use Psalm\Internal\Provider\FileStorageCacheProvider as InternalFileStorageCacheProvider;
use Psalm\Storage\FileStorage;

use function strtolower;

/**
 * @internal
 */
final class FileStorageCacheProvider extends InternalFileStorageCacheProvider
{
    /** @var array<lowercase-string, FileStorage> */
    private array $cache = [];

    public function __construct()
    {
    }

    /**
     * @param lowercase-string $file_path
     */
    protected function storeInCache(string $file_path, FileStorage $storage): void
    {
        $this->cache[$file_path] = $storage;
    }

    public function removeCacheForFile(string $file_path): void
    {
        unset($this->cache[strtolower($file_path)]);
    }

    /**
     * @param lowercase-string $file_path
     */
    protected function loadFromCache(string $file_path): ?FileStorage
    {
        return $this->cache[$file_path] ?? null;
    }
}