woocommerce/includes/shipping/local-pickup/class-wc-shipping-local-pickup.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Local Pickup Shipping Method.
 *
 * A simple shipping method allowing free pickup as a shipping method.
 *
 * @class 		WC_Shipping_Local_Pickup
 * @version		2.6.0
 * @package		WooCommerce/Classes/Shipping
 * @author 		WooThemes
 */
class WC_Shipping_Local_Pickup extends WC_Shipping_Method {

	/**
	 * Constructor.
	 *
	 * @param int $instance_id
	 */
	public function __construct( $instance_id = 0 ) {
		$this->id                    = 'local_pickup';
		$this->instance_id 			 = absint( $instance_id );
		$this->method_title          = __( 'Local pickup', 'woocommerce' );
		$this->method_description    = __( 'Allow customers to pick up orders themselves. By default, when using local pickup store base taxes will apply regardless of customer address.', 'woocommerce' );
		$this->supports              = array(
			'shipping-zones',
			'instance-settings',
			'instance-settings-modal',
		);
		$this->init();
	}

	/**
	 * Initialize local pickup.
	 */
	public function init() {

		// Load the settings.
		$this->init_form_fields();
		$this->init_settings();

		// Define user set variables
		$this->title		     = $this->get_option( 'title' );
		$this->tax_status	     = $this->get_option( 'tax_status' );
		$this->cost	             = $this->get_option( 'cost' );

		// Actions
		add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
	}

	/**
	 * calculate_shipping function.
	 * Calculate local pickup shipping.
	 *
	 * @param array $package
	 */
	public function calculate_shipping( $package = array() ) {
		$this->add_rate( array(
			'label' 	 => $this->title,
			'package'    => $package,
			'cost'       => $this->cost,
		) );
	}

	/**
	 * Init form fields.
	 */
	public function init_form_fields() {
		$this->instance_form_fields = array(
			'title' => array(
				'title'       => __( 'Title', 'woocommerce' ),
				'type'        => 'text',
				'description' => __( 'This controls the title which the user sees during checkout.', 'woocommerce' ),
				'default'     => __( 'Local pickup', 'woocommerce' ),
				'desc_tip'    => true,
			),
			'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' ),
				),
			),
			'cost' => array(
				'title' 		=> __( 'Cost', 'woocommerce' ),
				'type' 			=> 'text',
				'placeholder'	=> '0',
				'description'	=> __( 'Optional cost for local pickup.', 'woocommerce' ),
				'default'		=> '',
				'desc_tip'		=> true,
			),
		);
	}
}