woocommerce/classes/shipping/shipping.class.php

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<?php
/**
* WooCommerce Shipping Class
*
* Handles shipping and loads shipping methods via hooks.
*
* @class woocommerce_shipping
* @package WooCommerce
* @category Shipping
* @author WooThemes
*/
class woocommerce_shipping {
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private static $_instance;
public static $enabled = false;
public static $shipping_methods = array();
public static $chosen_method = null;
public static $shipping_total = 0;
public static $shipping_tax = 0;
public static $shipping_label = null;
public static function init() {
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if (get_option('woocommerce_calc_shipping')!='no') self::$enabled = true;
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do_action('woocommerce_shipping_init');
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$load_methods = apply_filters('woocommerce_shipping_methods', array());
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foreach ($load_methods as $method) :
self::$shipping_methods[] = &new $method();
endforeach;
}
public static function get() {
if (!isset(self::$_instance)) {
$c = __CLASS__;
self::$_instance = new $c;
}
return self::$_instance;
}
function get_available_shipping_methods() {
if (self::$enabled=='yes') :
$_available_methods = array();
foreach ( self::$shipping_methods as $shipping_method ) :
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if ($shipping_method->is_available()) :
$shipping_method->calculate_shipping();
// If available, put available methods/rates in the array
if ($shipping_method->multiple_rates) :
foreach ($shipping_method->rates as $rate) :
$method = $rate;
$_available_methods[$method->id] = $method;
endforeach;
else :
$method = $shipping_method;
$_available_methods[$method->id] = $method;
endif;
endif;
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endforeach;
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return $_available_methods;
endif;
}
function reset_shipping_methods() {
foreach ( self::$shipping_methods as $shipping_method ) :
$shipping_method->shipping_total = 0;
$shipping_method->shipping_tax = 0;
$shipping_method->rates = array();
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endforeach;
}
function calculate_shipping() {
if (self::$enabled=='yes') :
self::$shipping_total = 0;
self::$shipping_tax = 0;
self::$shipping_label = null;
$_cheapest_fee = '';
$_cheapest_method = '';
if (isset($_SESSION['_chosen_shipping_method'])) $chosen_method = $_SESSION['_chosen_shipping_method']; else $chosen_method = '';
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$calc_cheapest = false;
if (!$chosen_method || empty($chosen_method)) $calc_cheapest = true;
self::reset_shipping_methods();
$_available_methods = self::get_available_shipping_methods();
if (sizeof($_available_methods)>0) :
foreach ($_available_methods as $method_id => $method) :
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$fee = $method->shipping_total;
if ($fee < $_cheapest_fee || !is_numeric($_cheapest_fee)) :
$_cheapest_fee = $fee;
$_cheapest_method = $method_id;
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endif;
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endforeach;
// Default to cheapest
if ($calc_cheapest || !isset($_available_methods[$chosen_method])) :
$chosen_method = $_cheapest_method;
endif;
if ($chosen_method) :
$_SESSION['_chosen_shipping_method'] = $chosen_method;
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self::$shipping_total = $_available_methods[$chosen_method]->shipping_total;
self::$shipping_tax = $_available_methods[$chosen_method]->shipping_tax;
self::$shipping_label = $_available_methods[$chosen_method]->title;
endif;
endif;
endif;
}
function reset_shipping() {
unset($_SESSION['_chosen_shipping_method']);
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self::$shipping_total = 0;
self::$shipping_tax = 0;
self::$shipping_label = null;
}
}