vendor/topthink/framework/src/think/filesystem/CacheStore.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\filesystem;

use League\Flysystem\Cached\Storage\AbstractCache;
use Psr\SimpleCache\CacheInterface;

class CacheStore extends AbstractCache
{
    protected $store;

    protected $key;

    protected $expire;

    public function __construct(CacheInterface $store, $key = 'flysystem', $expire = null)
    {
        $this->key    = $key;
        $this->store  = $store;
        $this->expire = $expire;
    }

    /**
     * Store the cache.
     */
    public function save()
    {
        $contents = $this->getForStorage();

        $this->store->set($this->key, $contents, $this->expire);
    }

    /**
     * Load the cache.
     */
    public function load()
    {
        $contents = $this->store->get($this->key);

        if (!is_null($contents)) {
            $this->setFromStorage($contents);
        }
    }
}