<?php
/**
 * Magento
 *
 * 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@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_ImportExport
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Export adapter csv.
 *
 * @category    Mage
 * @package     Mage_ImportExport
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_ImportExport_Model_Export_Adapter_Csv extends Mage_ImportExport_Model_Export_Adapter_Abstract
{
    /**
     * Field delimiter.
     *
     * @var string
     */
    protected $_delimiter = ',';

    /**
     * Field enclosure character.
     *
     * @var string
     */
    protected $_enclosure = '"';

    /**
     * Source file handler.
     *
     * @var resource
     */
    protected $_fileHandler;

    /**
     * Object destructor.
     *
     * @return void
     */
    public function __destruct()
    {
        if (is_resource($this->_fileHandler)) {
            fclose($this->_fileHandler);
        }
    }

    /**
     * Method called as last step of object instance creation. Can be overrided in child classes.
     *
     * @return Mage_ImportExport_Model_Export_Adapter_Abstract
     */
    protected function _init()
    {
        $this->_fileHandler = fopen($this->_destination, 'w');
        return $this;
    }

    /**
     * MIME-type for 'Content-Type' header.
     *
     * @return string
     */
    public function getContentType()
    {
        return 'text/csv';
    }

    /**
     * Return file extension for downloading.
     *
     * @return string
     */
    public function getFileExtension()
    {
        return 'csv';
    }

    /**
     * Write row data to source file.
     *
     * @param array $rowData
     * @throws Exception
     * @return Mage_ImportExport_Model_Export_Adapter_Abstract
     */
    public function writeRow(array $rowData)
    {
        if (null === $this->_headerCols) {
            $this->setHeaderCols(array_keys($rowData));
        }
        fputcsv(
            $this->_fileHandler,
            array_merge($this->_headerCols, array_intersect_key($rowData, $this->_headerCols)),
            $this->_delimiter,
            $this->_enclosure
        );

        return $this;
    }
}