285 lines
7.7 KiB
PHP
285 lines
7.7 KiB
PHP
<?php
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/**
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* Flat Rate Shipping Method.
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*
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* @version 2.6.0
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* @package WooCommerce\Classes\Shipping
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*/
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defined( 'ABSPATH' ) || exit;
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/**
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* WC_Shipping_Flat_Rate class.
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*/
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class WC_Shipping_Flat_Rate extends WC_Shipping_Method {
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/**
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* Cost passed to [fee] shortcode.
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*
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* @var string Cost.
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*/
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protected $fee_cost = '';
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/**
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* Constructor.
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*
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* @param int $instance_id Shipping method instance ID.
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*/
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public function __construct( $instance_id = 0 ) {
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$this->id = 'flat_rate';
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$this->instance_id = absint( $instance_id );
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$this->method_title = __( 'Flat rate', 'woocommerce' );
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$this->method_description = __( 'Lets you charge a fixed rate for shipping.', 'woocommerce' );
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$this->supports = array(
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'shipping-zones',
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'instance-settings',
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'instance-settings-modal',
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);
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$this->init();
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add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
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}
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/**
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* Init user set variables.
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*/
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public function init() {
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$this->instance_form_fields = include 'includes/settings-flat-rate.php';
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$this->title = $this->get_option( 'title' );
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$this->tax_status = $this->get_option( 'tax_status' );
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$this->cost = $this->get_option( 'cost' );
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$this->type = $this->get_option( 'type', 'class' );
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}
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/**
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* Evaluate a cost from a sum/string.
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*
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* @param string $sum Sum of shipping.
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* @param array $args Args, must contain `cost` and `qty` keys. Having `array()` as default is for back compat reasons.
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* @return string
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*/
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protected function evaluate_cost( $sum, $args = array() ) {
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// Add warning for subclasses.
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if ( ! is_array( $args ) || ! array_key_exists( 'qty', $args ) || ! array_key_exists( 'cost', $args ) ) {
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wc_doing_it_wrong( __FUNCTION__, '$args must contain `cost` and `qty` keys.', '4.0.1' );
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}
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include_once WC()->plugin_path() . '/includes/libraries/class-wc-eval-math.php';
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// Allow 3rd parties to process shipping cost arguments.
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$args = apply_filters( 'woocommerce_evaluate_shipping_cost_args', $args, $sum, $this );
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$locale = localeconv();
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$decimals = array( wc_get_price_decimal_separator(), $locale['decimal_point'], $locale['mon_decimal_point'], ',' );
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$this->fee_cost = $args['cost'];
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// Expand shortcodes.
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add_shortcode( 'fee', array( $this, 'fee' ) );
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$sum = do_shortcode(
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str_replace(
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array(
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'[qty]',
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'[cost]',
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),
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array(
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$args['qty'],
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$args['cost'],
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),
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$sum
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)
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);
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remove_shortcode( 'fee', array( $this, 'fee' ) );
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// Remove whitespace from string.
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$sum = preg_replace( '/\s+/', '', $sum );
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// Remove locale from string.
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$sum = str_replace( $decimals, '.', $sum );
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// Trim invalid start/end characters.
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$sum = rtrim( ltrim( $sum, "\t\n\r\0\x0B+*/" ), "\t\n\r\0\x0B+-*/" );
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// Do the math.
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return $sum ? WC_Eval_Math::evaluate( $sum ) : 0;
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}
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/**
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* Work out fee (shortcode).
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*
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* @param array $atts Attributes.
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* @return string
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*/
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public function fee( $atts ) {
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$atts = shortcode_atts(
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array(
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'percent' => '',
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'min_fee' => '',
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'max_fee' => '',
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),
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$atts,
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'fee'
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);
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$calculated_fee = 0;
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if ( $atts['percent'] ) {
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$calculated_fee = $this->fee_cost * ( floatval( $atts['percent'] ) / 100 );
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}
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if ( $atts['min_fee'] && $calculated_fee < $atts['min_fee'] ) {
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$calculated_fee = $atts['min_fee'];
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}
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if ( $atts['max_fee'] && $calculated_fee > $atts['max_fee'] ) {
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$calculated_fee = $atts['max_fee'];
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}
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return $calculated_fee;
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}
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/**
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* Calculate the shipping costs.
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*
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* @param array $package Package of items from cart.
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*/
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public function calculate_shipping( $package = array() ) {
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$rate = array(
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'id' => $this->get_rate_id(),
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'label' => $this->title,
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'cost' => 0,
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'package' => $package,
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);
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// Calculate the costs.
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$has_costs = false; // True when a cost is set. False if all costs are blank strings.
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$cost = $this->get_option( 'cost' );
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if ( '' !== $cost ) {
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$has_costs = true;
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$rate['cost'] = $this->evaluate_cost(
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$cost,
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array(
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'qty' => $this->get_package_item_qty( $package ),
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'cost' => $package['contents_cost'],
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)
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);
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}
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// Add shipping class costs.
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$shipping_classes = WC()->shipping()->get_shipping_classes();
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if ( ! empty( $shipping_classes ) ) {
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$found_shipping_classes = $this->find_shipping_classes( $package );
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$highest_class_cost = 0;
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foreach ( $found_shipping_classes as $shipping_class => $products ) {
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// Also handles BW compatibility when slugs were used instead of ids.
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$shipping_class_term = get_term_by( 'slug', $shipping_class, 'product_shipping_class' );
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$class_cost_string = $shipping_class_term && $shipping_class_term->term_id ? $this->get_option( 'class_cost_' . $shipping_class_term->term_id, $this->get_option( 'class_cost_' . $shipping_class, '' ) ) : $this->get_option( 'no_class_cost', '' );
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if ( '' === $class_cost_string ) {
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continue;
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}
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$has_costs = true;
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$class_cost = $this->evaluate_cost(
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$class_cost_string,
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array(
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'qty' => array_sum( wp_list_pluck( $products, 'quantity' ) ),
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'cost' => array_sum( wp_list_pluck( $products, 'line_total' ) ),
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)
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);
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if ( 'class' === $this->type ) {
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$rate['cost'] += $class_cost;
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} else {
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$highest_class_cost = $class_cost > $highest_class_cost ? $class_cost : $highest_class_cost;
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}
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}
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if ( 'order' === $this->type && $highest_class_cost ) {
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$rate['cost'] += $highest_class_cost;
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}
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}
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if ( $has_costs ) {
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$this->add_rate( $rate );
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}
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/**
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* Developers can add additional flat rates based on this one via this action since @version 2.4.
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*
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* Previously there were (overly complex) options to add additional rates however this was not user.
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* friendly and goes against what Flat Rate Shipping was originally intended for.
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*/
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do_action( 'woocommerce_' . $this->id . '_shipping_add_rate', $this, $rate );
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}
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/**
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* Get items in package.
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*
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* @param array $package Package of items from cart.
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* @return int
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*/
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public function get_package_item_qty( $package ) {
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$total_quantity = 0;
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foreach ( $package['contents'] as $item_id => $values ) {
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if ( $values['quantity'] > 0 && $values['data']->needs_shipping() ) {
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$total_quantity += $values['quantity'];
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}
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}
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return $total_quantity;
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}
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/**
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* Finds and returns shipping classes and the products with said class.
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*
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* @param mixed $package Package of items from cart.
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* @return array
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*/
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public function find_shipping_classes( $package ) {
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$found_shipping_classes = array();
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foreach ( $package['contents'] as $item_id => $values ) {
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if ( $values['data']->needs_shipping() ) {
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$found_class = $values['data']->get_shipping_class();
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if ( ! isset( $found_shipping_classes[ $found_class ] ) ) {
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$found_shipping_classes[ $found_class ] = array();
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}
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$found_shipping_classes[ $found_class ][ $item_id ] = $values;
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}
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}
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return $found_shipping_classes;
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}
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/**
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* Sanitize the cost field.
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*
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* @since 3.4.0
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* @param string $value Unsanitized value.
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* @throws Exception Last error triggered.
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* @return string
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*/
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public function sanitize_cost( $value ) {
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$value = is_null( $value ) ? '' : $value;
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$value = wp_kses_post( trim( wp_unslash( $value ) ) );
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$value = str_replace( array( get_woocommerce_currency_symbol(), html_entity_decode( get_woocommerce_currency_symbol() ) ), '', $value );
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// Thrown an error on the front end if the evaluate_cost will fail.
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$dummy_cost = $this->evaluate_cost(
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$value,
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array(
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'cost' => 1,
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'qty' => 1,
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)
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);
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if ( false === $dummy_cost ) {
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throw new Exception( WC_Eval_Math::$last_error );
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}
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return $value;
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}
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}
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