492 lines
14 KiB
PHP
492 lines
14 KiB
PHP
<?php
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* WooCommerce Shipping Method Class.
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*
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* Extended by shipping methods to handle shipping calculations etc.
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*
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* @class WC_Shipping_Method
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* @version 2.6.0
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* @package WooCommerce/Abstracts
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* @category Abstract Class
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* @author WooThemes
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*/
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abstract class WC_Shipping_Method extends WC_Settings_API {
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/**
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* Features this method supports. Possible features used by core:
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* - shipping-zones Shipping zone functionality + instances
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* - instance-settings Instance settings screens.
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* - settings Non-instance settings screens. Enabled by default for BW compatibility with methods before instances existed.
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* - instance-settings-modal Allows the instance settings to be loaded within a modal in the zones UI.
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* @var array
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*/
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public $supports = array( 'settings' );
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/**
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* Unique ID for the shipping method - must be set.
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* @var string
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*/
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public $id = '';
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/**
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* Method title.
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* @var string
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*/
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public $method_title = '';
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/**
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* Method description.
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* @var string
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*/
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public $method_description = '';
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/**
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* yes or no based on whether the method is enabled.
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* @var string
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*/
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public $enabled = 'yes';
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/**
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* Shipping method title for the frontend.
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* @var string
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*/
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public $title;
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/**
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* This is an array of rates - methods must populate this array to register shipping costs.
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* @var array
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*/
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public $rates = array();
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/**
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* If 'taxable' tax will be charged for this method (if applicable).
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* @var string
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*/
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public $tax_status = 'taxable';
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/**
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* Fee for the method (if applicable).
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* @var string
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*/
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public $fee = null;
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/**
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* Minimum fee for the method (if applicable).
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* @var string
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*/
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public $minimum_fee = null;
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/**
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* Instance ID if used.
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* @var int
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*/
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public $instance_id = 0;
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/**
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* Instance form fields.
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* @var array
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*/
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public $instance_form_fields = array();
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/**
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* Instance settings.
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* @var array
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*/
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public $instance_settings = array();
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/**
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* Availability - legacy. Used for method Availability.
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* No longer useful for instance based shipping methods.
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* @deprecated 2.6.0
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* @var string
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*/
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public $availability;
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/**
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* Availability countries - legacy. Used for method Availability.
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* No longer useful for instance based shipping methods.
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* @deprecated 2.6.0
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* @var array
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*/
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public $countries = array();
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/**
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* Constructor.
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* @param int $instance_id
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*/
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public function __construct( $instance_id = 0 ) {
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$this->instance_id = absint( $instance_id );
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}
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/**
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* Check if a shipping method supports a given feature.
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*
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* Methods should override this to declare support (or lack of support) for a feature.
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*
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* @param $feature string The name of a feature to test support for.
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* @return bool True if the shipping method supports the feature, false otherwise.
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*/
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public function supports( $feature ) {
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return apply_filters( 'woocommerce_shipping_method_supports', in_array( $feature, $this->supports ), $feature, $this );
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}
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/**
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* Called to calculate shipping rates for this method. Rates can be added using the add_rate() method.
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*/
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public function calculate_shipping( $package = array() ) {}
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/**
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* Whether or not we need to calculate tax on top of the shipping rate.
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* @return boolean
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*/
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public function is_taxable() {
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return wc_tax_enabled() && 'taxable' === $this->tax_status && ! WC()->customer->is_vat_exempt();
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}
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/**
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* Whether or not this method is enabled in settings.
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* @since 2.6.0
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* @return boolean
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*/
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public function is_enabled() {
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return 'yes' === $this->enabled;
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}
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/**
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* Return the shipping method instance ID.
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* @since 2.6.0
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* @return int
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*/
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public function get_instance_id() {
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return $this->instance_id;
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}
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/**
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* Return the shipping method title.
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* @since 2.6.0
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* @return string
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*/
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public function get_method_title() {
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return apply_filters( 'woocommerce_shipping_method_title', $this->method_title, $this );
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}
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/**
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* Return the shipping method description.
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* @since 2.6.0
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* @return string
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*/
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public function get_method_description() {
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return apply_filters( 'woocommerce_shipping_method_description', $this->method_description, $this );
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}
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/**
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* Return the shipping title which is user set.
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*
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* @return string
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*/
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public function get_title() {
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return apply_filters( 'woocommerce_shipping_method_title', $this->title, $this->id );
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}
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/**
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* Return calculated rates for a package.
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* @since 2.6.0
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* @param object $package
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* @return array
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*/
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public function get_rates_for_package( $package ) {
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$this->rates = array();
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if ( $this->is_available( $package ) && ( empty( $package['ship_via'] ) || in_array( $this->id, $package['ship_via'] ) ) ) {
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$this->calculate_shipping( $package );
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}
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return $this->rates;
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}
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/**
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* Add a shipping rate. If taxes are not set they will be calculated based on cost.
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* @param array $args (default: array())
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* @param array $package option to store information about the package in meta.
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*/
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public function add_rate( $args = array(), $package = false ) {
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$args = wp_parse_args( $args, array(
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'id' => '', // ID for the rate
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'label' => '', // Label for the rate
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'cost' => '0', // Amount or array of costs (per item shipping)
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'taxes' => '', // Pass taxes, or leave empty to have it calculated for you, or 'false' to disable calculations
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'calc_tax' => 'per_order', // Calc tax per_order or per_item. Per item needs an array of costs
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'meta_data' => array() // Array of misc meta data to store along with this rate - key value pairs.
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) );
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// ID and label are required
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if ( ! $args['id'] || ! $args['label'] ) {
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return;
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}
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// Total up the cost
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$total_cost = is_array( $args['cost'] ) ? array_sum( $args['cost'] ) : $args['cost'];
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$taxes = $args['taxes'];
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// Taxes - if not an array and not set to false, calc tax based on cost and passed calc_tax variable. This saves shipping methods having to do complex tax calculations.
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if ( ! is_array( $taxes ) && $taxes !== false && $total_cost > 0 && $this->is_taxable() ) {
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$taxes = 'per_item' === $args['calc_tax'] ? $this->get_taxes_per_item( $args['cost'] ) : WC_Tax::calc_shipping_tax( $total_cost, WC_Tax::get_shipping_tax_rates() );
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}
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// Round the total cost after taxes have been calculated.
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$total_cost = wc_format_decimal( $total_cost, wc_get_price_decimals() );
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// Create rate object
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$rate = new WC_Shipping_Rate( $args['id'], $args['label'], $total_cost, $taxes, $this->id );
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if ( ! empty( $args['meta_data'] ) ) {
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foreach ( $args['meta_data'] as $key => $value ) {
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$rate->add_meta_data( $key, $value );
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}
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}
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// Store package data
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if ( $package ) {
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$items_in_package = array();
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foreach ( $package['contents'] as $item ) {
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$product = $item['data'];
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$items_in_package[] = $product->get_title() . ' × ' . $item['quantity'];
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}
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$rate->add_meta_data( __( 'Items', 'woocommerce' ), implode( ', ', $items_in_package ) );
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}
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$this->rates[ $args['id'] ] = $rate;
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}
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/**
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* Calc taxes per item being shipping in costs array.
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* @since 2.6.0
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* @access protected
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* @param array $costs
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* @return array of taxes
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*/
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protected function get_taxes_per_item( $costs ) {
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$taxes = array();
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// If we have an array of costs we can look up each items tax class and add tax accordingly
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if ( is_array( $costs ) ) {
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$cart = WC()->cart->get_cart();
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foreach ( $costs as $cost_key => $amount ) {
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if ( ! isset( $cart[ $cost_key ] ) ) {
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continue;
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}
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$item_taxes = WC_Tax::calc_shipping_tax( $amount, WC_Tax::get_shipping_tax_rates( $cart[ $cost_key ]['data']->get_tax_class() ) );
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// Sum the item taxes
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foreach ( array_keys( $taxes + $item_taxes ) as $key ) {
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$taxes[ $key ] = ( isset( $item_taxes[ $key ] ) ? $item_taxes[ $key ] : 0 ) + ( isset( $taxes[ $key ] ) ? $taxes[ $key ] : 0 );
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}
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}
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// Add any cost for the order - order costs are in the key 'order'
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if ( isset( $costs['order'] ) ) {
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$item_taxes = WC_Tax::calc_shipping_tax( $costs['order'], WC_Tax::get_shipping_tax_rates() );
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// Sum the item taxes
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foreach ( array_keys( $taxes + $item_taxes ) as $key ) {
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$taxes[ $key ] = ( isset( $item_taxes[ $key ] ) ? $item_taxes[ $key ] : 0 ) + ( isset( $taxes[ $key ] ) ? $taxes[ $key ] : 0 );
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}
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}
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}
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return $taxes;
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}
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/**
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* Is this method available?
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* @param array $package
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* @return bool
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*/
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public function is_available( $package ) {
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$available = $this->is_enabled();
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// Country availability (legacy, for non-zone based methods)
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if ( ! $this->instance_id ) {
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$countries = is_array( $this->countries ) ? $this->countries : array();
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switch ( $this->availability ) {
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case 'specific' :
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case 'including' :
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$available = in_array( $package['destination']['country'], array_intersect( $countries, array_keys( WC()->countries->get_shipping_countries() ) ) );
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break;
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case 'excluding' :
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$available = in_array( $package['destination']['country'], array_diff( array_keys( WC()->countries->get_shipping_countries() ), $countries ) );
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break;
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default :
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$available = in_array( $package['destination']['country'], array_keys( WC()->countries->get_shipping_countries() ) );
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break;
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}
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}
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return apply_filters( 'woocommerce_shipping_' . $this->id . '_is_available', $available, $package );
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}
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/**
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* Get fee to add to shipping cost.
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* @param string|float $fee
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* @param float $total
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* @return float
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*/
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public function get_fee( $fee, $total ) {
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if ( strstr( $fee, '%' ) ) {
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$fee = ( $total / 100 ) * str_replace( '%', '', $fee );
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}
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if ( ! empty( $this->minimum_fee ) && $this->minimum_fee > $fee ) {
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$fee = $this->minimum_fee;
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}
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return $fee;
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}
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/**
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* Does this method have a settings page?
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* @return bool
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*/
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public function has_settings() {
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return $this->instance_id ? $this->supports( 'instance-settings' ) : $this->supports( 'settings' );
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}
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/**
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* Return admin options as a html string.
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* @return string
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*/
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public function get_admin_options_html() {
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if ( $this->instance_id ) {
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$settings_html = $this->generate_settings_html( $this->get_instance_form_fields(), false );
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} else {
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$settings_html = $this->generate_settings_html( $this->get_form_fields(), false );
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}
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return '<table class="form-table">' . $settings_html . '</table>';
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}
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/**
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* Output the shipping settings screen.
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*/
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public function admin_options() {
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if ( ! $this->instance_id ) {
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echo '<h2>' . esc_html( $this->get_method_title() ) . '</h2>';
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}
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echo wp_kses_post( wpautop( $this->get_method_description() ) );
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echo $this->get_admin_options_html();
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}
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/**
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* get_option function.
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*
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* Gets and option from the settings API, using defaults if necessary to prevent undefined notices.
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*
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* @param string $key
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* @param mixed $empty_value
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* @return mixed The value specified for the option or a default value for the option.
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*/
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public function get_option( $key, $empty_value = null ) {
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// Instance options take priority over global options
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if ( array_key_exists( $key, $this->get_instance_form_fields() ) ) {
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return $this->get_instance_option( $key, $empty_value );
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}
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// Return global option
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return parent::get_option( $key, $empty_value );
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}
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/**
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* Gets an option from the settings API, using defaults if necessary to prevent undefined notices.
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*
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* @param string $key
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* @param mixed $empty_value
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* @return mixed The value specified for the option or a default value for the option.
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*/
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public function get_instance_option( $key, $empty_value = null ) {
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if ( empty( $this->instance_settings ) ) {
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$this->init_instance_settings();
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}
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// Get option default if unset.
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if ( ! isset( $this->instance_settings[ $key ] ) ) {
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$form_fields = $this->get_instance_form_fields();
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$this->instance_settings[ $key ] = $this->get_field_default( $form_fields[ $key ] );
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}
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if ( ! is_null( $empty_value ) && '' === $this->instance_settings[ $key ] ) {
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$this->instance_settings[ $key ] = $empty_value;
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}
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return $this->instance_settings[ $key ];
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}
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/**
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* Get settings fields for instances of this shipping method (within zones).
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* Should be overridden by shipping methods to add options.
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* @since 2.6.0
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* @return array
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*/
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public function get_instance_form_fields() {
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return apply_filters( 'woocommerce_shipping_instance_form_fields_' . $this->id, $this->instance_form_fields );
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}
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/**
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* Return the name of the option in the WP DB.
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* @since 2.6.0
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* @return string
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*/
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public function get_instance_option_key() {
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return $this->instance_id ? $this->plugin_id . $this->id . '_' . $this->instance_id . '_settings' : '';
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}
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/**
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* Initialise Settings for instances.
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* @since 2.6.0
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*/
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public function init_instance_settings() {
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$this->instance_settings = get_option( $this->get_instance_option_key(), null );
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// If there are no settings defined, use defaults.
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if ( ! is_array( $this->instance_settings ) ) {
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$form_fields = $this->get_instance_form_fields();
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$this->instance_settings = array_merge( array_fill_keys( array_keys( $form_fields ), '' ), wp_list_pluck( $form_fields, 'default' ) );
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}
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}
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/**
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* Processes and saves options.
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* If there is an error thrown, will continue to save and validate fields, but will leave the erroring field out.
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* @since 2.6.0
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* @param array $post_data Defaults to $_POST but can be passed in.
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* @return bool was anything saved?
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*/
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public function process_admin_options( $post_data = array() ) {
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if ( $this->instance_id ) {
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$this->init_instance_settings();
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if ( empty( $post_data ) ) {
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$post_data = $_POST;
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}
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foreach ( $this->get_instance_form_fields() as $key => $field ) {
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if ( 'title' !== $this->get_field_type( $field ) ) {
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try {
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$this->instance_settings[ $key ] = $this->get_field_value( $key, $field, $post_data );
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} catch ( Exception $e ) {
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$this->add_error( $e->getMessage() );
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}
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}
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}
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return update_option( $this->get_instance_option_key(), apply_filters( 'woocommerce_shipping_' . $this->id . '_instance_settings_values', $this->instance_settings, $this ) );
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} else {
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return parent::process_admin_options();
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}
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}
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}
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