<?php

namespace Doctrine\Common\Cache;

use function time;
/**
 * Array cache driver.
 *
 * @link   www.doctrine-project.org
 */
class ArrayCache extends \Doctrine\Common\Cache\CacheProvider
{
    /** @var array[] $data each element being a tuple of [$data, $expiration], where the expiration is int|bool */
    private $data = [];
    /** @var int */
    private $hitsCount = 0;
    /** @var int */
    private $missesCount = 0;
    /** @var int */
    private $upTime;
    /**
     * {@inheritdoc}
     */
    public function __construct()
    {
        $this->upTime = time();
    }
    /**
     * {@inheritdoc}
     */
    protected function doFetch($id)
    {
        if (!$this->doContains($id)) {
            $this->missesCount += 1;
            return \false;
        }
        $this->hitsCount += 1;
        return $this->data[$id][0];
    }
    /**
     * {@inheritdoc}
     */
    protected function doContains($id)
    {
        if (!isset($this->data[$id])) {
            return \false;
        }
        $expiration = $this->data[$id][1];
        if ($expiration && $expiration < time()) {
            $this->doDelete($id);
            return \false;
        }
        return \true;
    }
    /**
     * {@inheritdoc}
     */
    protected function doSave($id, $data, $lifeTime = 0)
    {
        $this->data[$id] = [$data, $lifeTime ? time() + $lifeTime : \false];
        return \true;
    }
    /**
     * {@inheritdoc}
     */
    protected function doDelete($id)
    {
        unset($this->data[$id]);
        return \true;
    }
    /**
     * {@inheritdoc}
     */
    protected function doFlush()
    {
        $this->data = [];
        return \true;
    }
    /**
     * {@inheritdoc}
     */
    protected function doGetStats()
    {
        return [\Doctrine\Common\Cache\Cache::STATS_HITS => $this->hitsCount, \Doctrine\Common\Cache\Cache::STATS_MISSES => $this->missesCount, \Doctrine\Common\Cache\Cache::STATS_UPTIME => $this->upTime, \Doctrine\Common\Cache\Cache::STATS_MEMORY_USAGE => null, \Doctrine\Common\Cache\Cache::STATS_MEMORY_AVAILABLE => null];
    }
}
