File io/filesystem/stream/BufferedFileWriter.class.php

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<?php
/**
 * @package     IO
 * @subpackage  Filesystem\stream
 * @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 28
 * @since       PHPBoost 3.0 - 2010 05 29
 * @contributor Julien BRISWALTER <j1.seth@phpboost.com>
 * @contributor Arnaud GENET <elenwii@phpboost.com>
*/

class BufferedFileWriter implements FileWriter
{
    const DEFAULT_BUFFER_SIZE = 100000;

    /**
     * @var File
     */
    private $file;
    private $buffer = '';
    private $buffer_max_size;

    public function __construct(File $file, $buffer_size = self::DEFAULT_BUFFER_SIZE)
    {
        $this->file = $file;
        $this->buffer_max_size = $buffer_size;
    }

    public function append($content)
    {
        if ($this->will_exceed_buffer_size($content))
        {
            $this->flush();
            $this->buffer = $content;
        }
        else
        {
            $this->append_to_buffer($content);
        }
    }

    private function will_exceed_buffer_size($content)
    {
        return TextHelper::strlen($this->buffer) + TextHelper::strlen($content) > $this->buffer_max_size;
    }

    public function flush()
    {
        $this->file->append($this->buffer);

    }

    private function append_to_buffer($content)
    {
        $this->buffer .= $content;
    }
}
?>