woocommerce/includes/admin/class-wc-admin-importers.php

<?php
/**
 * Setup importers for WC data
 *
 * @author      WooThemes
 * @category    Admin
 * @package     WooCommerce/Admin
 * @version     2.5.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'WC_Admin_Importers', false ) ) :

/**
 * WC_Admin_Importers Class.
 */
class WC_Admin_Importers {

	/**
	 * Hook in tabs.
	 */
	public function __construct() {
		add_action( 'admin_init', array( $this, 'register_importers' ) );
		add_action( 'import_start', array( $this, 'post_importer_compatibility' ) );
	}

	/**
	 * Add menu items.
	 */
	public function register_importers() {
		register_importer( 'woocommerce_tax_rate_csv', __( 'WooCommerce tax rates (CSV)', 'woocommerce' ), __( 'Import <strong>tax rates</strong> to your store via a csv file.', 'woocommerce' ), array( $this, 'tax_rates_importer' ) );
	}

	/**
	 * Add menu item.
	 */
	public function tax_rates_importer() {
		// Load Importer API
		require_once ABSPATH . 'wp-admin/includes/import.php';

		if ( ! class_exists( 'WP_Importer' ) ) {
			$class_wp_importer = ABSPATH . 'wp-admin/includes/class-wp-importer.php';

			if ( file_exists( $class_wp_importer ) ) {
				require $class_wp_importer;
			}
		}

		// includes
		require( dirname( __FILE__ ) . '/importers/class-wc-tax-rate-importer.php' );

		// Dispatch
		$importer = new WC_Tax_Rate_Importer();
		$importer->dispatch();
	}

	/**
	 * When running the WP importer, ensure attributes exist.
	 *
	 * WordPress import should work - however, it fails to import custom product attribute taxonomies.
	 * This code grabs the file before it is imported and ensures the taxonomies are created.
	 */
	public function post_importer_compatibility() {
		global $wpdb;

		if ( empty( $_POST['import_id'] ) || ! class_exists( 'WXR_Parser' ) ) {
			return;
		}

		$id          = absint( $_POST['import_id'] );
		$file        = get_attached_file( $id );
		$parser      = new WXR_Parser();
		$import_data = $parser->parse( $file );

		if ( isset( $import_data['posts'] ) ) {
			$posts = $import_data['posts'];

			if ( $posts && sizeof( $posts ) > 0 ) {
				foreach ( $posts as $post ) {
					if ( 'product' === $post['post_type'] ) {
						if ( ! empty( $post['terms'] ) ) {
							foreach ( $post['terms'] as $term ) {
								if ( strstr( $term['domain'], 'pa_' ) ) {
									if ( ! taxonomy_exists( $term['domain'] ) ) {
										$attribute_name = wc_sanitize_taxonomy_name( str_replace( 'pa_', '', $term['domain'] ) );

										// Create the taxonomy
										if ( ! in_array( $attribute_name, wc_get_attribute_taxonomies() ) ) {
											$attribute = array(
												'attribute_label'   => $attribute_name,
												'attribute_name'    => $attribute_name,
												'attribute_type'    => 'select',
												'attribute_orderby' => 'menu_order',
												'attribute_public'  => 0,
											);
											$wpdb->insert( $wpdb->prefix . 'woocommerce_attribute_taxonomies', $attribute );
											delete_transient( 'wc_attribute_taxonomies' );
										}

										// Register the taxonomy now so that the import works!
										register_taxonomy(
											$term['domain'],
											apply_filters( 'woocommerce_taxonomy_objects_' . $term['domain'], array( 'product' ) ),
											apply_filters( 'woocommerce_taxonomy_args_' . $term['domain'], array(
												'hierarchical' => true,
												'show_ui'      => false,
												'query_var'    => true,
												'rewrite'      => false,
											) )
										);
									}
								}
							}
						}
					}
				}
			}
		}
	}
}

endif;

return new WC_Admin_Importers();