";echo $attribute; die();
						$variation_ids[ $key ][ $id_type ] = $this->products->getAttributeValueByType( $variation, $attribute, $merchant_attribute );
					}
				}

				return $variation_ids;
			}
		}

		// For non variation products
		$attributeValue = "";
		if ( 'pattern' === $config['type'][ $attr_key ] ) {
			$attributeValue = $config['default'][ $attr_key ];
		} else {
			$attributeValue = $this->products->getAttributeValueByType( $product, $attribute, $merchant_attribute );
		}

		return [ $id_type => $attributeValue ];
	}

	/**
	 * Convert an array to XML
	 *
	 * @param array $array array to convert
	 * @param mixed $xml xml object
	 *
	 */
	function woo_feed_array_to_xml( $array, &$xml ) {
		foreach ( $array as $key => $value ) {
			if ( is_array( $value ) ) {
				if ( ! is_numeric( $key ) ) {
					$subnode = $xml->addChild( "$key" );
					$this->woo_feed_array_to_xml( $value, $subnode );
				} else {
					$this->woo_feed_array_to_xml( $value, $xml );
				}
			} else {
				if ( "overall" === $key ) {
					$rating = $xml->addChild( $key, "$value" );
					$rating->addAttribute( 'min', '1' );
					$rating->addAttribute( 'max', '5' );
				} elseif ( "review_url" === $key ) {
					$rating = $xml->addChild( $key, "$value" );
					$rating->addAttribute( 'type', 'group' );
				} else {
					$value = htmlspecialchars( $value );
					$xml->addChild( "$key", "$value" );
				}
			}
		}
	}

	/**
	 * Make XML Feed
	 *
	 * @return string
	 */
	public function make_review_xml_feed() {
		// create simpleXML object
		$xml = new SimpleXMLElement( "" );
		$this->woo_feed_array_to_xml( $this->data, $xml );
		$feedBody = $xml->asXML();

		$data                     = new DOMDocument();
		$data->preserveWhiteSpace = false;
		$data->formatOutput       = true;
		$data->loadXML( $feedBody );
		$feedBody = $data->saveXML();

		return $feedBody;
	}
}