ClientCache.php

<?php
declare(strict_types=1);

namespace LanguageServer\Cache;

use LanguageServer\LanguageClient;
use Sabre\Event\Promise;

/**
 * Caches content through a xcache/* requests
 */
class ClientCache implements Cache
{
    /**
     * @var LanguageClient
     */
    public $client;

    /**
     * @param LanguageClient $client
     */
    public function __construct(LanguageClient $client)
    {
        $this->client = $client;
    }

    /**
     * Gets a value from the cache
     *
     * @param string $key
     * @return Promise <mixed>
     */
    public function get(string $key): \Generator
    {
        $cached = yield from $this->client->xcache->get($key);
        $obj = unserialize($cached);
        return $obj;
    }

    /**
     * Sets a value in the cache
     *
     * @param string $key
     * @param mixed $value
     * @return Promise
     */
    public function set(string $key, $value): \Generator
    {
        return yield from $this->client->xcache->set($key, serialize($value));
    }
}