<?php

class Customcache
{
    public static function store($key, $data, $ttl = 86400)
    {
        $filename = self::getFileName($key);
        $content = gzdeflate(serialize([time() + $ttl, $data]));
        file_put_contents($filename, $content);
    }

    public static function fetch($key)
    {
        $filename = self::getFileName($key);

        if (!file_exists($filename) || !is_readable($filename)) {
            return false;
        }

        $data = gzinflate(file_get_contents($filename));
        $data = @unserialize($data);

        if (!$data) {
            unlink($filename);
            return false;
        }

        if (time() > $data[0]) {
            unlink($filename);
            return false;
        }

        return $data[1];
    }

    private static function getFileName($key)
    {
        $md5 = md5($key);
        $dir = _PS_CACHE_DIR_ . 'custom_cache/' . $md5[0] . '/' . $md5[1] . '/';

        if (!is_dir($dir)) {
            mkdir($dir, 0755, true);
        }

        return $dir . 'cache_' . $md5;
    }
}