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.
	 */
	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'
		);
		$this->init();
	}

	/**
	 * init function.
	 */
	public function init() {

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

		// Define user set variables
		$this->enabled		= $this->get_option( 'enabled' );
		$this->title		= $this->get_option( 'title' );
		$this->codes		= $this->get_option( 'codes' );
		$this->availability	= $this->get_option( 'availability' );
		$this->countries	= $this->get_option( 'countries' );

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

	/**
	 * calculate_shipping function.
	 */
	public function calculate_shipping() {
		$this->add_rate( array(
			'id' 		=> $this->id . $this->instance_id,
			'label' 	=> $this->title,
		) );
	}

	/**
	 * init_form_fields function.
	 */
	public function init_form_fields() {
		$this->instance_form_fields = array(
			'enabled' => array(
				'title'   => __( 'Enable', 'woocommerce' ),
				'type'    => 'checkbox',
				'label'   => __( 'Enable local pickup', 'woocommerce' ),
				'default' => 'no'
			),
			'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,
			)
		);
	}

	/**
	 * Get postcodes for this method.
	 * @return array
	 */
	public function get_valid_postcodes() {
		$codes = array();

		if ( $this->codes != '' ) {
			foreach( explode( ',', $this->codes ) as $code ) {
				$codes[] = strtoupper( trim( $code ) );
			}
		}

		return $codes;
	}

	/**
	 * See if a given postcode matches valid postcodes.
	 * @param  string postcode
	 * @param  string country code
	 * @return boolean
	 */
	public function is_valid_postcode( $postcode, $country ) {
		$codes              = $this->get_valid_postcodes();
		$postcode           = $this->clean( $postcode );
		$formatted_postcode = wc_format_postcode( $postcode, $country );

		if ( in_array( $postcode, $codes ) || in_array( $formatted_postcode, $codes ) ) {
			return true;
		}

		// Pattern matching
		foreach ( $codes as $c ) {
			$pattern = '/^' . str_replace( '_', '[0-9a-zA-Z]', preg_quote( $c ) ) . '$/i';
			if ( preg_match( $pattern, $postcode ) ) {
				return true;
			}
		}

		// Wildcard search
		$wildcard_postcode = $formatted_postcode . '*';
		$postcode_length   = strlen( $formatted_postcode );

		for ( $i = 0; $i < $postcode_length; $i++ ) {
			if ( in_array( $wildcard_postcode, $codes ) ) {
				return true;
			}
			$wildcard_postcode = substr( $wildcard_postcode, 0, -2 ) . '*';
		}

		return false;
	}

	/**
	 * See if the method is available.
	 *
	 * @param array $package
	 * @return bool
	 */
	public function is_available( $package ) {
		$is_available = "yes" === $this->enabled;

		if ( $is_available && $this->get_valid_postcodes() ) {
			$is_available = $this->is_valid_postcode( $package['destination']['postcode'], $package['destination']['country'] );
		}

		if ( $is_available ) {
			if ( $this->availability === 'specific' ) {
				$ship_to_countries = $this->countries;
			} else {
				$ship_to_countries = array_keys( WC()->countries->get_shipping_countries() );
			}
			if ( is_array( $ship_to_countries ) && ! in_array( $package['destination']['country'], $ship_to_countries ) ) {
				$is_available = false;
			}
		}

		return apply_filters( 'woocommerce_shipping_' . $this->id . '_is_available', $is_available, $package );
	}

	/**
	 * clean function.
	 *
	 * @access public
	 * @param mixed $code
	 * @return string
	 */
	public function clean( $code ) {
		return str_replace( '-', '', sanitize_title( $code ) ) . ( strstr( $code, '*' ) ? '*' : '' );
	}
}