<?php
/**
 * ShipStation
 *
 * 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@auctane.com so we can send you a copy immediately.
 *
 * @category   Shipping
 * @package    Auctane_Api
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

class Auctane_Api_Helper_Data extends Mage_Core_Helper_Data
{

	/**
	 * Write a source object to an XML stream, mapping fields via a fieldset.
	 * Fieldsets are nodes in config.xml
	 * 
	 * @param string $fieldset
	 * @param array|Varien_Object $source
	 * @param XMLWriter $xml
	 */
	public function fieldsetToXml($fieldset, $source, XMLWriter $xml)
	{
		$fields = (array) Mage::getConfig()->getFieldset($fieldset);
		foreach ($fields as $field => $dest) {
			if (!$dest->auctaneapi) continue;

			$name = $dest->auctaneapi == '*' ? $field : $dest->auctaneapi;
			$value = $source instanceof Varien_Object
				? $source->getDataUsingMethod($field)
				: @$source[$field];
			$xml->writeElement((string) $name, (string) $value);
		}
	}

	/**
	 * @return array of string names
	 * @see "auctane_exclude" nodes in config.xml
	 */
	public function getIncludedProductTypes()
	{
		static $types;
		if (!isset($types)) {
			$types = Mage::getModel('catalog/product_type')->getTypes();
			$types = array_filter($types, create_function('$type', 'return !@$type["auctane_exclude"];'));
		}
		return array_keys($types);
	}

	/**
	 * Indicate if a {$type} is specifically excluded by config
	 * 
	 * @param string $type
	 * @return bool
	 */
	public function isExcludedProductType($type)
	{
		static $types;
		if (!isset($types)) {
			$types = Mage::getModel('catalog/product_type')->getTypes();
			$types = array_filter($types, create_function('$type', 'return (bool) @$type["auctane_exclude"];'));
		}
		return isset($types[$type]);
	}

}