WooCommerce Shipping Method Skeleton Plugin

gistfile1.txt

<?php
/*
Plugin Name: Your Shipping plugin
Plugin URI: http://woothemes.com/woocommerce
Description: Your shipping method plugin
Version: 1.0.1
Author: WooThemes
Author URI: http://woothemes.com
*/

/**
 * Check if WooCommerce is active
 */
if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {

	class your_shipping_method_setup {

		public function __construct() {
			add_action( 'woocommerce_shipping_init', array($this, 'your_shipping_method_init') );
			add_filter( 'woocommerce_shipping_methods', array( $this, 'add_your_shipping_method') );
		}
		
		public function your_shipping_method_init() {
			include('your_shipping_plugin_class.php');
		}

		public function add_your_shipping_method( $methods ) {
			$methods['your_shipping_method'] = 'WC_Your_Shipping_Method';
			return $methods;
		}
	}
	new your_shipping_method_setup();
}

your_shipping_plugin_class.php

<?php
		if ( ! class_exists( 'WC_Your_Shipping_Method' ) ) {
			class WC_Your_Shipping_Method extends WC_Shipping_Method {
				/**
				 * Constructor for your shipping class
				 *
				 * @access public
				 * @return void
				 */
				public function __construct( $instance_id = 0 ) {
					$this->id                 = 'your_shipping_method'; // Id for your shipping method. Should be uunique.
					$this->instance_id        = absint( $instance_id );
					$this->method_title       = __( 'Your Shipping Method' );  // Title shown in admin
					$this->method_description = __( 'Description of your shipping method' ); // Description shown in admin

					$this->supports              = array(
						'shipping-zones',
						'instance-settings',
						'instance-settings-modal',
					);
					$this->enabled            = "yes"; // This can be added as an setting but for this example its forced enabled
					$this->init();
					add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
				}

				/**
				 * Init your settings
				 *
				 * @access public
				 * @return void
				 */
				public function init() {
					// Load the settings API
					$this->instance_form_fields = include( 'your_shipping_plugin_settings.php' );
					$this->title                = $this->get_option( 'title' );
					$this->tax_status           = $this->get_option( 'tax_status' );
					$this->type                 = $this->get_option( 'type', 'class' );

					// Save settings in admin if you have any defined
				}

				/**
				 * calculate_shipping function.
				 *
				 * @access public
				 * @param mixed $package
				 * @return void
				 */
				public function calculate_shipping( $package = array() ) {
					$rate = array(
						'id' => $this->get_rate_id(),
						'label' => $this->title,
						'cost' => 10.99,
						'taxes' => true,
						'package' => $package
					);

					// Register the rate
					$this->add_rate( $rate );
					do_action( 'woocommerce_' . $this->id . '_shipping_add_rate', $this, $rate );
				}
				public function get_package_item_qty( $package ) {
					$total_quantity = 0;
					foreach ( $package['contents'] as $item_id => $values ) {
						if ( $values['quantity'] > 0 && $values['data']->needs_shipping() ) {
							$total_quantity += $values['quantity'];
						}
					}
					return $total_quantity;
				}

				public function find_shipping_classes( $package ) {
					$found_shipping_classes = array();
					foreach ( $package['contents'] as $item_id => $values ) {
						if ( $values['data']->needs_shipping() ) {
							$found_class = $values['data']->get_shipping_class();
							if ( ! isset( $found_shipping_classes[ $found_class ] ) ) {
								$found_shipping_classes[ $found_class ] = array();
							}
							$found_shipping_classes[ $found_class ][ $item_id ] = $values;
						}
					}
					return $found_shipping_classes;
				}
			}
		}

your_shipping_plugin_settings.php

<?php

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

/**
 * Settings for Russian post shipping.
 */
$settings = array(
	'title' => array(
		'title' 		=> __( 'Method Title', 'woocommerce' ),
		'type' 			=> 'text',
		'description' 	=> __( 'This controls the title which the user sees during checkout.', 'woocommerce' ),
		'default'		=> __( 'Your Shipping Plugin', 'woocommerce' ),
		'desc_tip'		=> false
	),
	'tax_status' => array(
		'title' 		=> __( 'Tax Status', 'woocommerce' ),
		'type' 			=> 'select',
		'class'         => 'wc-enhanced-select',
		'default' 		=> 'taxable',
		'options'		=> array(
			'taxable' 	=> __( 'Taxable', 'woocommerce' ),
			'none' 		=> _x( 'None', 'Tax status', 'woocommerce' )
		)
	),
);

$shipping_classes = WC()->shipping->get_shipping_classes();

if ( ! empty( $shipping_classes ) ) {
	$settings[ 'class_costs' ] = array(
		'title'			 => __( 'Shipping Class Costs', 'woocommerce' ),
		'type'			 => 'title',
		'default'        => '',
		'description'    => sprintf( __( 'These costs can optionally be added based on the %sproduct shipping class%s.', 'woocommerce' ), '<a href="' . admin_url( 'edit-tags.php?taxonomy=product_shipping_class&post_type=product' ) . '">', '</a>' )
	);
	foreach ( $shipping_classes as $shipping_class ) {
		if ( ! isset( $shipping_class->term_id ) ) {
			continue;
		}
		$settings[ 'class_cost_' . $shipping_class->term_id ] = array(
			'title'       => sprintf( __( '"%s" Shipping Class Cost', 'woocommerce' ), esc_html( $shipping_class->name ) ),
			'type'        => 'text',
			'placeholder' => __( 'N/A', 'woocommerce' ),
			'description' => $cost_desc,
			'default'     => $this->get_option( 'class_cost_' . $shipping_class->slug ), // Before 2.5.0, we used slug here which caused issues with long setting names
			'desc_tip'    => true
		);
	}
	$settings[ 'no_class_cost' ] = array(
		'title'       => __( 'No Shipping Class Cost', 'woocommerce' ),
		'type'        => 'text',
		'placeholder' => __( 'N/A', 'woocommerce' ),
		'description' => $cost_desc,
		'default'     => '',
		'desc_tip'    => true
	);
	$settings[ 'type' ] = array(
		'title' 		=> __( 'Calculation Type', 'woocommerce' ),
		'type' 			=> 'select',
		'class'         => 'wc-enhanced-select',
		'default' 		=> 'class',
		'options' 		=> array(
			'class' 	=> __( 'Per Class: Charge shipping for each shipping class individually', 'woocommerce' ),
			'order' 	=> __( 'Per Order: Charge shipping for the most expensive shipping class', 'woocommerce' ),
		),
	);
}

return $settings;

Thanx for the template. I used it and now ran into problem due to not being good in php.
How can I call methods of class your_shipping_method_setup (first file) from class WC_Your_Shipping_Method (second file)?

I added following (in bold) to the first file:
global $my_var;
$my_var = new your_shipping_method_setup();

but still cannot call its methods in second file like:
$my_var->my_method();

Am I missing something?