Classes

File io/data/store/FileSystemDataStore.class.php

File io/data/store/FileSystemDataStore.class.php

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<?php
/**
 * This data store is not very efficient but is the only one which has an infinite life span
 * when APC is not available.
 * It stores data in the /cache folder.
 * @package     IO
 * @subpackage  Data\store
 * @copyright   &copy; 2005-2019 PHPBoost
 * @license     https://www.gnu.org/licenses/gpl-3.0.html GNU/GPL-3.0
 * @author      Benoit SAUTEL <ben.popeye@phpboost.com>
 * @version     PHPBoost 5.2 - last update: 2016 10 30
 * @since       PHPBoost 3.0 - 2011 01 11
 * @contributor Julien BRISWALTER <j1.seth@phpboost.com>
*/

class FileSystemDataStore implements DataStore
{
    private $prefix;
    /**
     * @var RAMDataStore
     */
    private $files_cache;

    public function __construct($id)
    {
        $this->prefix = $id;
        $this->files_cache = new RAMDataStore();
    }

    /**
     * {@inheritdoc}
     */
    public function get($id)
    {
        if ($this->contains($id))
        {
            return $this->get_data($id);
        }
        throw new RAMCacheException($id);
    }

    private function get_data($name)
    {
        $file = $this->get_file($name);
        $content = $file->read();
        $data = TextHelper::unserialize($content);
        return $data;
    }

    /**
     * {@inheritdoc}
     */
    public function contains($id)
    {
        return $this->get_file($id)->exists();
    }

    /**
     * {@inheritdoc}
     */
    public function store($id, $data)
    {
        $file = $this->get_file($id);
        $data_to_write = TextHelper::serialize($data);
        $file->open(File::WRITE);
        $file->lock();
        $file->write($data_to_write);
        $file->unlock();
        $file->close();
        $file->change_chmod(0666);
    }

    /**
     * {@inheritdoc}
     */
    public function delete($id)
    {
        try
        {
            $this->get_file($id)->delete();
        }
        catch(IOException $ex)
        {
        }
    }

    /**
     * {@inheritdoc}
     */
    public function clear()
    {
        $cache_dir = new Folder(PATH_TO_ROOT . '/cache');
        $files = $cache_dir->get_files('`^' . $this->prefix . '-.*`');
        foreach ($files as $file)
        {
            $file->delete();
        }
    }

    private function get_file($id)
    {
        if ($this->files_cache->contains($id))
        {
            return $this->files_cache->get($id);
        }
        else
        {
            $file = new File(PATH_TO_ROOT . '/cache/' . $this->prefix . '-' . $id);
            $this->files_cache->store($id, $file);
            return $file;
        }
    }
}
?>