Introduce vendor names along with standard labels across shipping packages

functions.php

	define("PV_ATTRIBUTE", "vendor");
	if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
	/**
	 * Check if WooCommerce is active
	 */
	if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {
		if ( ! class_exists( 'TH_Shipping_Options' ) ) {
			class TH_Shipping_Options {
				/**
				 * Constructor for your shipping class
				 *
				 * @access public
				 * @return void
				 */
				public function __construct() {
					// take care of anything else that needs to be done immediately upon plugin instantiation, here in the constructor.
					add_filter( 'woocommerce_cart_shipping_packages', array( &$this, 'th_woocommerce_cart_shipping_packages') );
					// Overriding template to introduce vendor names along with standard labels across shipping packages.
					//add_filter( 'woocommerce_locate_template', array( $this, 'th_woocommerce_locate_template' ), 10, 3 );
				}
				
				function th_woocommerce_locate_template( $template, $template_name, $template_path ) { 
					if('cart/cart-shipping.php' == $template_name)
					{
							$path = plugin_dir_path( __FILE__ ) . '/woocommerce/templates/' . $template_name;  
							return file_exists( $path ) ? $path : $template;
					}
					return $template;
				}
		
				function th_woocommerce_cart_shipping_packages( $packages ) {
					// Reset the packages
					$packages = array();
					$vendor_items_map = array();
					foreach ( WC()->cart->get_cart() as $item ) {
						$product_id = $item['product_id'];
						$vendors = get_product_vendors( $product_id  );
						if ( $item['data']->needs_shipping() ) {
							if($vendors) {
								foreach( $vendors as $vendor ) {
									// Expecting/assuming there is only one Vendor assigned per product. Hm.
									$vendor_items_map[$vendor->ID][] = $item;
									break;
								}
							}
							// No product vendor associated with item.
							else {
								$vendor_items_map['0'][] = $item;
							}
						}
					}
					
					foreach($vendor_items_map as $key => $vendor_items) {
						$packages[] = array(
							//'ship_via' => array( 'flat_rate' ),
							'contents' => $vendor_items,
							'contents_cost' => array_sum( wp_list_pluck( $vendor_items, 'line_total' ) ),
							'applied_coupons' => WC()->cart->applied_coupons,
							'destination' => array(
								'country' => WC()->customer->get_shipping_country(),
								'state' => WC()->customer->get_shipping_state(),
								'postcode' => WC()->customer->get_shipping_postcode(),
								'city' => WC()->customer->get_shipping_city(),
								'address' => WC()->customer->get_shipping_address(),
								'address_2' => WC()->customer->get_shipping_address_2()
							)
						);	
					}
					
					return $packages;
				}
			}
			
			// finally instantiate our plugin class and add it to the set of globals
			$GLOBALS['th_shipping_options_init'] = new TH_Shipping_Options();
		}
		// Start up this plugin
		add_action( 'init', 'TH_Shipping_Options' );
		function TH_Shipping_Options() {
			global $TH_Shipping_Options;
			$TH_Shipping_Options = new TH_Shipping_Options();
		}
	}