<?php
/*
* 2007-2011 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2011 PrestaShop SA
*  @version  Release: $Revision$
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

/**
 * Simple class to output CSV data
 * @since 1.5
 */
class CSVCore
{
	public $filename;
    public $objects;
    public $delimiter;

    /**
     * Loads objects, filename and optionnaly a delimiter.
     * @param Array|object $objects : Assumed to be an Array of objects or an object
     * @param string $filename : used later to save the file
     * @param string $delimiter Optional : delimiter used
     */
	public function __construct(&$objects, $filename, $delimiter = ';')
	{
		$this->filename = $filename;
		$this->delimiter = $delimiter;

		$this->objects = $objects;
		if (!is_array($objects))
			$this->objects = array($objects);
	}

	/**
	 * Main function
	 * Adds headers
	 * Outputs
	 */
	public function export()
	{
		$this->headers();

		$current_object_name = '';
		foreach ($this->objects as $object)
		{
			$vars = get_object_vars($object);

			// ouputs keys if needed
			if (get_class($object) != $current_object_name)
			{
				$this->output(array_keys($vars));
				$current_object_name = get_class($object);
			}

			// outputs values
			$this->output($vars);
			unset($vars);
		}
	}

	/**
	 * Wraps data and echoes
	 * Uses defined delimiter
	 */
	public function output($data)
	{
    	$wraped_data = array_map(array('CSVCore', 'wrap'), $data);
        echo sprintf("%s\n", implode($this->delimiter, $wraped_data));
	}

	/**
	 * Escapes data
	 * @param string $data
	 * @return string $data
	 */
    public function wrap($data)
    {
        $data = preg_replace('/"(.+)"/', '""$1""', $data);
        return sprintf('"%s"', $data);
    }

    /**
     * Adds headers
     */
    public function headers()
    {
        header('Content-Type: application/csv');
        header("Content-disposition: attachment; filename={$this->filename}.csv");
    }
}