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<?php
/**
 * @package         Regular Labs Library
 * @version         23.9.3039
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            https://regularlabs.com
 * @copyright       Copyright © 2023 Regular Labs All Rights Reserved
 * @license         GNU General Public License version 2 or later
 */

namespace RegularLabs\Library;

defined('_JEXEC') or die;

use Exception;
use Joomla\CMS\Cache\CacheController as JCacheController;
use Joomla\CMS\Factory as JFactory;

/**
 * Class CacheNew
 *
 * @package RegularLabs\Library
 */
class CacheNew
{
    static array $cache = [];
    /**
     * @var [JCacheController]
     */
    private array  $file_cache_controllers  = [];
    private bool   $force_caching           = true;
    private string $group;
    private string $id;
    private int    $time_to_life_in_seconds = 0;
    private bool   $use_files               = false;

    /**
     * @param $id
     */
    public function __construct($id, $group = 'regularlabs')
    {
        if ( ! is_string($id))
        {
            $id = json_encode($id);
        }

        $this->id    = md5($id);
        $this->group = $group;
    }

    /**
     * @return bool
     */
    public function exists()
    {
        if ( ! $this->use_files)
        {
            return $this->existsMemory();
        }

        return $this->existsMemory() || $this->existsFile();
    }

    /**
     * @return null|mixed
     */
    public function get()
    {
        return $this->use_files
            ? $this->getFile()
            : $this->getMemory();
    }

    /**
     * @param $data
     *
     * @return mixed
     */
    public function set($data)
    {
        return $this->use_files
            ? $this->setFile($data)
            : $this->setMemory($data);
    }

    /**
     * @param int  $time_to_life_in_minutes
     * @param bool $force_caching
     *
     * @return $this
     */
    public function useFiles($time_to_life_in_minutes = 0, $force_caching = true)
    {
        $this->use_files = true;

        // convert ttl to minutes
        $this->time_to_life_in_seconds = $time_to_life_in_minutes * 60;

        $this->force_caching = $force_caching;

        return $this;
    }

    /**
     * @return bool
     */
    private function existsFile()
    {
        if (JFactory::getConfig()->get('debug') || JFactory::getApplication()->input->get('debug'))
        {
            return false;
        }

        return $this->getFileCache()->contains($this->id);
    }

    /**
     * @return bool
     */
    private function existsMemory()
    {
        return isset(static::$cache[$this->id]);
    }

    /**
     * @return false|mixed
     * @throws Exception
     */
    private function getFile()
    {
        if ($this->existsMemory())
        {
            return $this->getMemory();
        }

        $data = $this->getFileCache()->get($this->id);

        $this->setMemory($data);

        return $data;
    }

    // Get the cached object from the Joomla cache

    /**
     * @return JCacheController
     */
    private function getFileCache()
    {
        $id = json_encode([$this->group, $this->time_to_life_in_seconds, $this->force_caching]);

        if (isset($this->file_cache_controllers[$id]))
        {
            return $this->file_cache_controllers[$id];
        }

        $cache = JFactory::getCache($this->group, 'output');

        if ($this->time_to_life_in_seconds)
        {
            // convert ttl to minutes
            $cache->setLifeTime($this->time_to_life_in_seconds * 60);
        }

        if ($this->force_caching)
        {
            $cache->setCaching(true);
        }

        $this->file_cache_controllers[$id] = $cache;

        return $this->file_cache_controllers[$id];
    }

    /**
     * @return null|mixed
     */
    private function getMemory()
    {
        if ( ! $this->existsMemory())
        {
            return null;
        }

        $data = static::$cache[$this->id];

        return is_object($data) ? clone $data : $data;
    }

    /**
     * @param mixed $data
     *
     * @return mixed
     * @throws Exception
     */
    private function setFile($data)
    {
        $this->setMemory($data);

        if (JFactory::getConfig()->get('debug') || JFactory::getApplication()->input->get('debug'))
        {
            return $data;
        }

        $this->getFileCache()->store($data, $this->id);

        return $data;
    }

    /**
     * @param mixed $data
     *
     * @return mixed
     */
    private function setMemory($data)
    {
        static::$cache[$this->id] = $data;

        return $data;
    }
}