WC_Shipping_Flat_Rate

Complexity

Total Complexity

27

Size/Duplication

Total Lines	225
Duplicated Lines	32 %

Coupling/Cohesion

Components	1
Dependencies	2

7 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	13	1
A	init()	0	10	1
B	evaluate_cost()	0	38	2
A	fee()	18	18	4
C	calculate_shipping()	28	76	11
A	get_package_item_qty()	9	9	4
A	find_shipping_classes()	17	17	4

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 14 and the first side effect is on line 3.

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Flat Rate Shipping Method.
 *
 * @class 		WC_Shipping_Flat_Rate
 * @version		2.6.0
 * @package		WooCommerce/Classes/Shipping
 * @author 		WooThemes
 */
class WC_Shipping_Flat_Rate extends WC_Shipping_Method {

	/** @var string cost passed to [fee] shortcode */
	protected $fee_cost = '';

	/**
	 * Constructor.
	 */
	public function __construct( $instance_id = 0 ) {
		$this->id                    = 'flat_rate';
		$this->instance_id 			 = absint( $instance_id );
		$this->method_title          = __( 'Flat Rate', 'woocommerce' );
		$this->method_description    = __( 'Lets you charge a fixed rate for shipping.', 'woocommerce' );
		$this->supports              = array(
			'shipping-zones',
			'instance-settings'
		);
		$this->init();

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

	/**
	 * init user set variables.
	 */
	public function init() {
		$this->instance_form_fields = include( 'includes/settings-flat-rate.php' );
		$this->enabled		        = $this->get_option( 'enabled' );
		$this->title                = $this->get_option( 'title' );
		$this->availability         = $this->get_option( 'availability' );

The property WC_Shipping_Method::$availability has been deprecated with message: 2.6.0

		$this->countries            = $this->get_option( 'countries' );

The property WC_Shipping_Method::$countries has been deprecated with message: 2.6.0

It seems like $this->get_option('countries') of type * is incompatible with the declared type array of property $countries.

		$this->tax_status           = $this->get_option( 'tax_status' );
		$this->cost                 = $this->get_option( 'cost' );
		$this->type                 = $this->get_option( 'type', 'class' );
	}

	/**
	 * Evaluate a cost from a sum/string.
	 * @param  string $sum
	 * @param  array  $args
	 * @return string
	 */
	protected function evaluate_cost( $sum, $args = array() ) {
		include_once( 'includes/class-wc-eval-math.php' );

		// Allow 3rd parties to process shipping cost arguments
		$args           = apply_filters( 'woocommerce_evaluate_shipping_cost_args', $args, $sum, $this );
		$locale         = localeconv();
		$decimals       = array( wc_get_price_decimal_separator(), $locale['decimal_point'], $locale['mon_decimal_point'] );
		$this->fee_cost = $args['cost'];

		// Expand shortcodes
		add_shortcode( 'fee', array( $this, 'fee' ) );

		$sum = do_shortcode( str_replace(
			array(
				'[qty]',
				'[cost]'
			),
			array(
				$args['qty'],
				$args['cost']
			),
			$sum
		) );

		remove_shortcode( 'fee', array( $this, 'fee' ) );

		// Remove whitespace from string
		$sum = preg_replace( '/\s+/', '', $sum );

		// Remove locale from string
		$sum = str_replace( $decimals, '.', $sum );

		// Trim invalid start/end characters
		$sum = rtrim( ltrim( $sum, "\t\n\r\0\x0B+*/" ), "\t\n\r\0\x0B+-*/" );

		// Do the math
		return $sum ? WC_Eval_Math::evaluate( $sum ) : 0;
	}

	/**
	 * Work out fee (shortcode).
	 * @param  array $atts
	 * @return string
	 */
	public function fee( $atts ) {

This method seems to be duplicated in your project.

		$atts = shortcode_atts( array(
			'percent' => '',
			'min_fee' => ''
		), $atts );

		$calculated_fee = 0;

		if ( $atts['percent'] ) {
			$calculated_fee = $this->fee_cost * ( floatval( $atts['percent'] ) / 100 );
		}

		if ( $atts['min_fee'] && $calculated_fee < $atts['min_fee'] ) {
			$calculated_fee = $atts['min_fee'];
		}

		return $calculated_fee;
	}

	/**
	 * calculate_shipping function.
	 *
	 * @param array $package (default: array())
	 */
	public function calculate_shipping( $package = array() ) {
		$rate = array(
			'id'    => $this->id . $this->instance_id,
			'label' => $this->title,
			'cost'  => 0,
		);

		// Calculate the costs
		$has_costs = false; // True when a cost is set. False if all costs are blank strings.
		$cost      = $this->get_option( 'cost' );

		if ( $cost !== '' ) {

This code seems to be duplicated across your project.

			$has_costs    = true;
			$rate['cost'] = $this->evaluate_cost( $cost, array(
				'qty'  => $this->get_package_item_qty( $package ),
				'cost' => $package['contents_cost']
			) );
		}

		// Add shipping class costs
		$found_shipping_classes = $this->find_shipping_classes( $package );
		$highest_class_cost     = 0;

		foreach ( $found_shipping_classes as $shipping_class => $products ) {

This code seems to be duplicated across your project.

			// Also handles BW compatibility when slugs were used instead of ids
			$shipping_class_term = get_term_by( 'slug', $shipping_class, 'product_shipping_class' );
			$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', '' );

			if ( $class_cost_string === '' ) {
				continue;
			}

			$has_costs  = true;
			$class_cost = $this->evaluate_cost( $class_cost_string, array(
				'qty'  => array_sum( wp_list_pluck( $products, 'quantity' ) ),
				'cost' => array_sum( wp_list_pluck( $products, 'line_total' ) )
			) );

			if ( $this->type === 'class' ) {
				$rate['cost'] += $class_cost;
			} else {
				$highest_class_cost = $class_cost > $highest_class_cost ? $class_cost : $highest_class_cost;
			}
		}

		if ( $this->type === 'order' && $highest_class_cost ) {
			$rate['cost'] += $highest_class_cost;
		}

		// Add the rate
		if ( $has_costs ) {
			$this->add_rate( $rate );
		}

		/**
		 * Developers can add additional flat rates based on this one via this action since @version 2.4.
		 *
		 * Previously there were (overly complex) options to add additional rates however this was not user.
		 * friendly and goes against what Flat Rate Shipping was originally intended for.
		 *
		 * This example shows how you can add an extra rate based on this flat rate via custom function:
		 *
		 * 		add_action( 'woocommerce_flat_rate_shipping_add_rate', 'add_another_custom_flat_rate', 10, 2 );
		 *
		 * 		function add_another_custom_flat_rate( $method, $rate ) {
		 * 			$new_rate          = $rate;
		 * 			$new_rate['id']    .= ':' . 'custom_rate_name'; // Append a custom ID.
		 * 			$new_rate['label'] = 'Rushed Shipping'; // Rename to 'Rushed Shipping'.
		 * 			$new_rate['cost']  += 2; // Add $2 to the cost.
		 *
		 * 			// Add it to WC.
		 * 			$method->add_rate( $new_rate );
		 * 		}.
		 */
		do_action( 'woocommerce_' . $this->id . '_shipping_add_rate', $this, $rate, $package );
	}

	/**
	 * Get items in package.
	 * @param  array $package
	 * @return int
	 */
	public function get_package_item_qty( $package ) {

This method seems to be duplicated in your project.

		$total_quantity = 0;
		foreach ( $package['contents'] as $item_id => $values ) {
			if ( $values['quantity'] > 0 && $values['data']->needs_shipping() ) {
				$total_quantity += $values['quantity'];
			}
		}
		return $total_quantity;
	}

	/**
	 * Finds and returns shipping classes and the products with said class.
	 * @param mixed $package
	 * @return array
	 */
	public function find_shipping_classes( $package ) {

This method seems to be duplicated in your project.

		$found_shipping_classes = array();

		foreach ( $package['contents'] as $item_id => $values ) {
			if ( $values['data']->needs_shipping() ) {
				$found_class = $values['data']->get_shipping_class();

				if ( ! isset( $found_shipping_classes[ $found_class ] ) ) {
					$found_shipping_classes[ $found_class ] = array();
				}

				$found_shipping_classes[ $found_class ][ $item_id ] = $values;
			}
		}

		return $found_shipping_classes;
	}
}