function _wpsc_filter_merchant_v2_payment_method_form_fields($fields)
{
    $selected_value = isset($_POST['wpsc_payment_method']) ? $_POST['wpsc_payment_method'] : '';
    if (empty($selected_value)) {
        $current_purchase_log_id = wpsc_get_customer_meta('current_purchase_log_id');
        $purchase_log = new WPSC_Purchase_Log($current_purchase_log_id);
        $selected_value = $purchase_log->get('gateway');
    }
    $gateways = _wpsc_merchant_v2_get_active_gateways();
    if (empty($gateways)) {
        return $fields;
    }
    foreach (_wpsc_merchant_v2_get_active_gateways() as $gateway) {
        $gateway = (object) $gateway;
        $title = $gateway->name;
        if (!empty($gateway->image)) {
            $title .= ' <img src="' . $gateway->image . '" alt="' . $gateway->name . '" />';
        }
        $field = array('title' => $title, 'type' => 'radio', 'value' => $gateway->internalname, 'name' => 'wpsc_payment_method', 'checked' => $selected_value == $gateway->internalname);
        $fields[] = $field;
    }
    // check the first payment gateway by default
    if (empty($selected_value)) {
        $fields[0]['checked'] = true;
    }
    return $fields;
}

 private function callback_login()
 {
     if (empty($_COOKIE[TEST_COOKIE])) {
         $this->message_collection->add(__("Cookies are blocked or not supported by your browser. You must <a href='http://www.google.com/cookies.html'>enable cookies</a> to log in to your account.", 'wp-e-commerce'), 'error');
     }
     $form_args = wpsc_get_login_form_args();
     $validation = wpsc_validate_form($form_args);
     if (is_wp_error($validation)) {
         wpsc_set_validation_errors($validation);
         return;
     }
     $user = wp_signon(array('user_login' => $_POST['username'], 'user_password' => $_POST['password'], 'rememberme' => !empty($_POST['rememberme'])));
     if (is_wp_error($user)) {
         $this->message_collection->add(__('We do not recognize the login information you entered. Please try again.', 'wp-e-commerce'), 'error');
         return;
     }
     $redirect_to = wp_get_referer();
     if (wpsc_get_customer_meta('checkout_after_login')) {
         $redirect_to = wpsc_get_checkout_url();
         wpsc_delete_customer_meta('checkout_after_login');
     }
     if (!$redirect_to || trim(str_replace(home_url(), '', $redirect_to), '/') == trim($_SERVER['REQUEST_URI'], '/')) {
         $redirect_to = wpsc_get_store_url();
     }
     wp_redirect($redirect_to);
     exit;
 }

function gateway_paystation($seperator, $sessionid)
{
    $price = number_format(nzshpcrt_overall_total_price(wpsc_get_customer_meta('billing_country')), 2, '', ',');
    $url = "https://www.paystation.co.nz/dart/darthttp.dll?paystation&pi=" . get_option('paystation_id') . "&ms=" . $sessionid . "&am=" . $price . "";
    header("Location: {$url}");
    exit;
}

 private function get_completed()
 {
     $this->completed = wpsc_get_customer_meta('checkout_wizard_completed_steps');
     if (!is_array($this->completed)) {
         $this->completed = array();
     }
 }

function gateway_dps($seperator, $sessionid)
{
    $PxAccess_Url = get_option('access_url');
    $PxAccess_Userid = get_option('access_userid');
    $PxAccess_Key = get_option('access_key');
    $Mac_Key = get_option('mac_key');
    $pxaccess = new PxAccess($PxAccess_Url, $PxAccess_Userid, $PxAccess_Key, $Mac_Key);
    $request = new PxPayRequest();
    $http_host = getenv("HTTP_HOST");
    $request_uri = getenv("SCRIPT_NAME");
    $server_url = get_option('siteurl');
    $script_url = get_option('transact_url');
    //Using this code after PHP version 4.3.4  ?page_id=$_GET['page_id']
    //echo $script_url . '<br />';
    //exit(get_option('checkout_url'));
    # the following variables are read from the form
    $Address1 = $_POST['address'];
    $Address2 = "";
    #Set up PxPayRequest Object
    $request->setAmountInput(nzshpcrt_overall_total_price(wpsc_get_customer_meta('shipping_country')));
    $request->setTxnData1(get_option('blogname'));
    # whatever you want to appear, original:   $request->setTxnData1("Widget order");
    $request->setTxnData2("n/a");
    # whatever you want to appear
    $request->setTxnData3("n/a");
    # whatever you want to appear
    $request->setTxnType("Purchase");
    if (get_option('dps_curcode') != '') {
        $request->setInputCurrency(get_option('dps_curcode'));
    } else {
        $request->setInputCurrency("USD");
    }
    $request->setMerchantReference($sessionid);
    # fill this with your order number
    $request->setEmailAddress(get_option('purch_log_email'));
    $request->setUrlFail($script_url);
    $request->setUrlSuccess($script_url);
    #Call makeResponse of PxAccess object to obtain the 3-DES encrypted payment request
    $request_string = $pxaccess->makeRequest($request);
    header("Location: {$request_string}");
    exit;
}

 function getQuote()
 {
     global $wpdb, $wpec_ash;
     if (!is_object($wpec_ash)) {
         $wpec_ash = new ASH();
     }
     // Arguments array for various functions to use
     $args = array();
     // Final rate table
     $rate_table = array();
     // Get the ups settings from the ups account info page (Shipping tab)
     $wpsc_ups_settings = get_option("wpsc_ups_settings", array());
     // Get the wordpress shopping cart options
     $wpsc_options = get_option("wpsc_options");
     // API Auth settings //
     $args['username'] = array_key_exists('upsaccount', $wpsc_ups_settings) ? $wpsc_ups_settings['upsusername'] : "";
     $args['password'] = array_key_exists('upspassword', $wpsc_ups_settings) ? $wpsc_ups_settings['upspassword'] : "";
     $args['api_id'] = array_key_exists('upsid', $wpsc_ups_settings) ? $wpsc_ups_settings['upsid'] : "";
     $args['account_number'] = array_key_exists('upsaccount', $wpsc_ups_settings) ? $wpsc_ups_settings['upsaccount'] : "";
     $args['negotiated_rates'] = array_key_exists('ups_negotiated_rates', $wpsc_ups_settings) ? $wpsc_ups_settings['ups_negotiated_rates'] : "";
     $args['residential'] = $wpsc_ups_settings['49_residential'];
     $args["singular_shipping"] = array_key_exists("singular_shipping", $wpsc_ups_settings) ? $wpsc_ups_settings["singular_shipping"] : "0";
     $args['insured_shipment'] = array_key_exists("insured_shipment", $wpsc_ups_settings) ? $wpsc_ups_settings["insured_shipment"] : "0";
     // What kind of pickup service do you use ?
     $args['DropoffType'] = $wpsc_ups_settings['DropoffType'];
     $args['packaging'] = $wpsc_ups_settings['48_container'];
     // Preferred Currency to display
     $currency_data = $wpdb->get_row($wpdb->prepare("SELECT `code`\n                                         FROM `" . WPSC_TABLE_CURRENCY_LIST . "`\n                                         WHERE `isocode`= %s\n                                         LIMIT 1", get_option('currency_type')), ARRAY_A);
     if ($currency_data) {
         $args['currency'] = $currency_data['code'];
     } else {
         $args['currency'] = "USD";
     }
     // Shipping billing / account address
     $origin_region_data = $wpdb->get_results($wpdb->prepare("SELECT `" . WPSC_TABLE_REGION_TAX . "`.* FROM `" . WPSC_TABLE_REGION_TAX . "`\n                                WHERE `" . WPSC_TABLE_REGION_TAX . "`.`id` = %d ", get_option('base_region')), ARRAY_A);
     $args['shipr_state'] = is_array($origin_region_data) ? $origin_region_data[0]['code'] : "";
     $args['shipr_city'] = get_option('base_city');
     $args['shipr_ccode'] = get_option('base_country');
     $args['shipr_pcode'] = get_option('base_zipcode');
     // Physical Shipping address being shipped from
     $args['shipf_state'] = $args['shipr_state'];
     $args['shipf_city'] = $args['shipr_city'];
     $args['shipf_ccode'] = $args['shipr_ccode'];
     $args['shipf_pcode'] = $args['shipr_pcode'];
     // Get the total weight from the shopping cart
     $args['units'] = "LBS";
     $args['weight'] = wpsc_cart_weight_total();
     // Destination zip code
     $args['dest_ccode'] = wpsc_get_customer_meta('shipping_country');
     if ($args['dest_ccode'] == "UK") {
         // So, UPS is a little off the times
         $args['dest_ccode'] = "GB";
     }
     // If ths zip code is provided via a form post use it!
     $args['dest_pcode'] = (string) wpsc_get_customer_meta('shipping_zip');
     if (isset($_POST['zipcode']) && ($_POST['zipcode'] != __("Your Zipcode", 'wpsc') && $_POST['zipcode'] != "YOURZIPCODE")) {
         $args['dest_pcode'] = esc_attr($_POST['zipcode']);
     }
     if (in_array($args['dest_pcode'], array(__('Your Zipcode', 'wpsc'), 'YOURZIPCODE'))) {
         $args['dest_pcode'] = '';
     }
     wpsc_update_customer_meta('shipping_zip', $args['dest_pcode']);
     if (empty($args['dest_pcode'])) {
         // We cannot get a quote without a zip code so might as well return!
         return array();
     }
     // If the region code is provided via a form post use it!
     if (isset($_POST['region']) && !empty($_POST['region'])) {
         $query = $wpdb->prepare("SELECT `" . WPSC_TABLE_REGION_TAX . "`.* FROM `" . WPSC_TABLE_REGION_TAX . "`\n                                WHERE `" . WPSC_TABLE_REGION_TAX . "`.`id` = %d", $_POST['region']);
         $dest_region_data = $wpdb->get_results($query, ARRAY_A);
         $args['dest_state'] = is_array($dest_region_data) ? $dest_region_data[0]['code'] : "";
         wpsc_update_customer_meta('ups_state', $args['dest_state']);
     } else {
         if ($dest_state = wpsc_get_customer_meta('ups_state')) {
             // Well, we have a zip code in the session and no new one provided
             $args['dest_state'] = $dest_state;
         } else {
             $args['dest_state'] = "";
         }
     }
     $shipping_cache_check['state'] = $args['dest_state'];
     $shipping_cache_check['zipcode'] = $args['dest_pcode'];
     $shipping_cache_check['weight'] = $args['weight'];
     $session_cache_check = wpsc_get_customer_meta('ups_shipping_cache_check');
     if (!is_array($session_cache_check)) {
         $session_cache_check = array();
     }
     $session_cache = wpsc_get_customer_meta('ups_shipping_cache');
     if (!is_array($session_cache)) {
         $session_cache = array();
     }
     if (!(bool) $args["singular_shipping"]) {
         // This is where shipping breaks out of UPS if weight is higher than 150 LBS
         if ($weight > 150) {
             wpsc_delete_customer_meta('quote_shipping_method');
             $shipping_quotes[TXT_WPSC_OVER_UPS_WEIGHT] = 0;
             $session_cache_check['weight'] = $args['weight'];
             $session_cache[$this->internal_name] = $shipping_quotes;
             wpsc_update_customer_meta('quote_shipping_method', $this->internal_name);
             wpsc_update_customer_meta('ups_shipping_cache_check', $session_cache_check);
//.........这里部分代码省略.........

 function getQuote()
 {
     global $wpdb, $wpec_ash, $wpsc_cart, $wpec_ash_tools;
     // Arguments array for various functions to use
     $args = array();
     $args['dest_ccode'] = wpsc_get_customer_meta('shippingcountry');
     // Get the ups settings from the ups account info page (Shipping tab)
     $wpsc_ups_settings = get_option('wpsc_ups_settings', array());
     //Disable International Shipping. Default: Enabled, as it currently is.
     $args['intl_rate'] = isset($wpsc_ups_settings['intl_rate']) && !empty($wpsc_ups_settings['intl_rate']) ? FALSE : TRUE;
     if (!$args['intl_rate'] && $args['dest_ccode'] != get_option('base_country')) {
         return array();
     }
     // Destination zip code
     $args['dest_pcode'] = (string) wpsc_get_customer_meta('shippingpostcode');
     if (!is_object($wpec_ash_tools)) {
         $wpec_ash_tools = new ASHTools();
     }
     if (empty($args['dest_pcode']) && $wpec_ash_tools->needs_post_code($args['dest_ccode'])) {
         // We cannot get a quote without a zip code so might as well return!
         return array();
     }
     // Get the total weight from the shopping cart
     $args['weight'] = wpsc_cart_weight_total();
     if (empty($args['weight'])) {
         return array();
     }
     $args['dest_state'] = '';
     $wpsc_country = new WPSC_Country(wpsc_get_customer_meta('shippingcountry'));
     if ($wpsc_country->has_regions()) {
         $wpsc_region = $wpsc_country->get_region(wpsc_get_customer_meta('shippingregion'));
         if (is_a($wpsc_region, 'WPSC_Region')) {
             $args['dest_state'] = $wpsc_region->get_code();
         }
     }
     if (empty($args['dest_state'])) {
         $args['dest_state'] = wpsc_get_customer_meta('shippingstate');
     }
     if (!is_object($wpec_ash)) {
         $wpec_ash = new ASH();
     }
     $shipping_cache_check['state'] = $args['dest_state'];
     //The destination is needed for cached shipment check.
     $shipping_cache_check['country'] = $args['dest_ccode'];
     $shipping_cache_check['zipcode'] = $args['dest_pcode'];
     $this->shipment = $wpec_ash->get_shipment();
     $this->shipment->set_destination($this->internal_name, $shipping_cache_check);
     //Set this shipment's destination.
     $this->shipment->rates_expire = date('Y-m-d');
     $args['shipper'] = $this->internal_name;
     $args['singular_shipping'] = array_key_exists('singular_shipping', $wpsc_ups_settings) ? $wpsc_ups_settings['singular_shipping'] : '0';
     if ($args['weight'] > 150 && !(bool) $args['singular_shipping']) {
         // This is where shipping breaks out of UPS if weight is higher than 150 LBS
         $over_weight_txt = apply_filters('wpsc_shipment_over_weight', __('Your order exceeds the standard shipping weight limit. Please contact us to quote other shipping alternatives.', 'wpsc'), $args);
         $shipping_quotes[$over_weight_txt] = 0;
         // yes, a constant.
         $wpec_ash->cache_results($this->internal_name, array($shipping_quotes), $this->shipment);
         //Update shipment cache.
         return array($shipping_quotes);
     }
     $cache = $wpec_ash->check_cache($this->internal_name, $this->shipment);
     //And now, we're ready to check cache.
     // We do not want to spam UPS (and slow down our process) if we already
     // have a shipping quote!
     if (count($cache['rate_table']) >= 1) {
         return $cache['rate_table'];
     }
     // Final rate table
     $rate_table = array();
     // API Auth settings //
     $args['username'] = array_key_exists('upsaccount', $wpsc_ups_settings) ? $wpsc_ups_settings['upsusername'] : '';
     $args['password'] = array_key_exists('upspassword', $wpsc_ups_settings) ? $wpsc_ups_settings['upspassword'] : '';
     $args['api_id'] = array_key_exists('upsid', $wpsc_ups_settings) ? $wpsc_ups_settings['upsid'] : '';
     $args['account_number'] = array_key_exists('upsaccount', $wpsc_ups_settings) ? $wpsc_ups_settings['upsaccount'] : '';
     $args['negotiated_rates'] = array_key_exists('ups_negotiated_rates', $wpsc_ups_settings) ? $wpsc_ups_settings['ups_negotiated_rates'] : '';
     $args['residential'] = $wpsc_ups_settings['49_residential'];
     $args['insured_shipment'] = array_key_exists('insured_shipment', $wpsc_ups_settings) ? $wpsc_ups_settings['insured_shipment'] : '0';
     // What kind of pickup service do you use ?
     $args['DropoffType'] = $wpsc_ups_settings['DropoffType'];
     $args['packaging'] = $wpsc_ups_settings['48_container'];
     // Preferred Currency to display
     $currency_data = WPSC_Countries::get_currency_code(get_option('currency_type'));
     if (!empty($currency_data)) {
         $args['currency'] = $currency_data;
     } else {
         $args['currency'] = 'USD';
     }
     // Shipping billing / account address
     $region = new WPSC_Region(get_option('base_country'), get_option('base_region'));
     $args['shipr_state'] = $region->get_code();
     $args['shipr_city'] = get_option('base_city');
     $args['shipr_ccode'] = get_option('base_country');
     $args['shipr_pcode'] = get_option('base_zipcode');
     // Physical Shipping address being shipped from
     $args['shipf_state'] = $args['shipr_state'];
     $args['shipf_city'] = $args['shipr_city'];
     $args['shipf_ccode'] = $args['shipr_ccode'];
     $args['shipf_pcode'] = $args['shipr_pcode'];
     $args['units'] = 'LBS';
     $args['cart_total'] = $wpsc_cart->calculate_subtotal(true);
//.........这里部分代码省略.........

        ?>
 colspan='2'>
                     <h4><?php 
        echo wpsc_checkout_form_name();
        ?>
</h4>
                  </td>
               </tr>
               <?php 
        if (wpsc_is_shipping_details()) {
            ?>
               <tr class='same_as_shipping_row'>
                  <td colspan ='2'>
                  <?php 
            $checked = '';
            $shipping_same_as_billing = wpsc_get_customer_meta('shippingSameBilling');
            if (isset($_POST['shippingSameBilling']) && $_POST['shippingSameBilling']) {
                $shipping_same_as_billing = true;
            } elseif (isset($_POST['submit']) && !isset($_POST['shippingSameBilling'])) {
                $shipping_same_as_billing = false;
            }
            wpsc_update_customer_meta('shippingSameBilling', $shipping_same_as_billing);
            if ($shipping_same_as_billing) {
                $checked = 'checked="checked"';
            }
            ?>
					<label for='shippingSameBilling'><input type='checkbox' value='true'  data-wpsc-meta-key="shippingSameBilling" class= "wpsc-visitor-meta"  name='shippingSameBilling' id='shippingSameBilling' <?php 
            echo $checked;
            ?>
 /><?php 
            _e('Same as billing address:', 'wp-e-commerce');

/**
 * output shipping error messages
 *
 * @since 3.8.14.1
 *
 * @access private
 */
function _wpsc_shipping_error_messages()
{
    $shipping_error_messages = wpsc_get_customer_meta('shipping_error_messages');
    if (!empty($shipping_error_messages)) {
        ?>
	<div class="wpsc-shipping-error_messages error">
	<?php 
        foreach ($shipping_error_messages as $id => $message) {
            ?>
			<div class="wpsc-shipping-error_message error" id="<?php 
            echo esc_attr($id);
            ?>
">
			<?php 
            echo esc_html($message);
            ?>
			</div>
			<?php 
        }
        ?>
	</div>
	<?php 
    }
}

function wpsc_shipping_country_list($shippingdetails = false)
{
    global $wpsc_shipping_modules;
    $wpsc_checkout = new wpsc_checkout();
    $wpsc_checkout->checkout_item = $shipping_country_checkout_item = $wpsc_checkout->get_checkout_item('shippingcountry');
    $output = '';
    if ($shipping_country_checkout_item && $shipping_country_checkout_item->active) {
        if (!$shippingdetails) {
            $output = "<input type='hidden' name='wpsc_ajax_action' value='update_location' />";
        }
        $acceptable_countries = wpsc_get_acceptable_countries();
        // if there is only one country to choose from we are going to set that as the shipping country,
        // later in the UI generation the same thing will happen to make the single country the current
        // selection
        $countries = WPSC_Countries::get_countries(false);
        if (count($countries) == 1) {
            reset($countries);
            $id_of_only_country_available = key($countries);
            $wpsc_country = new WPSC_Country($id_of_only_country_available);
            wpsc_update_customer_meta('shippingcountry', $wpsc_country->get_isocode());
        }
        $selected_country = wpsc_get_customer_meta('shippingcountry');
        $additional_attributes = 'data-wpsc-meta-key="shippingcountry" ';
        $output .= wpsc_get_country_dropdown(array('id' => 'current_country', 'name' => 'country', 'class' => 'current_country wpsc-visitor-meta', 'acceptable_ids' => $acceptable_countries, 'selected' => $selected_country, 'additional_attributes' => $additional_attributes, 'placeholder' => __('Please select a country', 'wp-e-commerce')));
    }
    $output .= wpsc_checkout_shipping_state_and_region();
    $zipvalue = (string) wpsc_get_customer_meta('shippingpostcode');
    $zip_code_text = __('Your Zipcode', 'wp-e-commerce');
    if ($zipvalue != '' && $zipvalue != $zip_code_text) {
        $color = '#000';
        wpsc_update_customer_meta('shipping_zip', $zipvalue);
    } else {
        $zipvalue = $zip_code_text;
        $color = '#999';
    }
    $uses_zipcode = false;
    $custom_shipping = get_option('custom_shipping_options');
    foreach ((array) $custom_shipping as $shipping) {
        if (isset($wpsc_shipping_modules[$shipping]->needs_zipcode) && $wpsc_shipping_modules[$shipping]->needs_zipcode == true) {
            $uses_zipcode = true;
        }
    }
    if ($uses_zipcode) {
        $output .= " <input data-wpsc-meta-key='shippingpostcode' class='wpsc-visitor-meta' type='text' style='color:" . $color . ";' onclick='if (this.value==\"" . esc_js($zip_code_text) . "\") {this.value=\"\";this.style.color=\"#000\";}' onblur='if (this.value==\"\") {this.style.color=\"#999\"; this.value=\"" . esc_js($zip_code_text) . "\"; }' value='" . esc_attr($zipvalue) . "' size='10' name='zipcode' id='zipcode'>";
    }
    return $output;
}

    /**
     * Error Page Template
     *
     * @since 3.9
     */
    public function filter_paypal_error_page()
    {
        $errors = wpsc_get_customer_meta('paypal_express_checkout_errors');
        ob_start();
        ?>
	<p>
	<?php 
        _e('Sorry, your transaction could not be processed by PayPal. Please contact the site administrator. The following errors are returned:', 'wp-e-commerce');
        ?>
		</p>
			<ul>
			<?php 
        foreach ($errors as $error) {
            ?>
			<li><?php 
            echo esc_html($error['details']);
            ?>
 (<?php 
            echo esc_html($error['code']);
            ?>
)</li>
			<?php 
        }
        ?>
		</ul>
			<p><a href="<?php 
        echo esc_url($this->get_shopping_cart_payment_url());
        ?>
"><?php 
        'Click here to go back to the checkout page.';
        ?>
</a></p>
<?php 
        $output = apply_filters('wpsc_paypal_express_checkout_gateway_error_message', ob_get_clean(), $errors);
        return $output;
    }

 /**
  * Creates cache key for current cart and ZIP code for shipping rates.
  * @since 3.8.9
  * @return string
  */
 public function get_cache_key()
 {
     global $wpsc_cart;
     if (!is_object($wpsc_cart) || empty($wpsc_cart->cart_items)) {
         return false;
     }
     $cached_object = array();
     $products = $wpsc_cart->cart_items;
     $zip = wpsc_get_customer_meta('shipping_zip');
     $num = 0;
     foreach ($products as $product) {
         if (!$product->uses_shipping) {
             continue;
         }
         $cached_object['products'][$num]['sku'] = $product->sku;
         $cached_object['products'][$num]['qty'] = $product->quantity;
         $num++;
     }
     $cached_object['zip'] = $zip;
     return 'rates_' . hash('md5', json_encode($cached_object));
 }

 /**
  * Common routine to put the current customer meta values into an jax
  * response in a format to be consumed by the wp-e-commerce.js ajax processings
  *
  * @since 3.8.14
  * @access private
  *
  * @param array values being readied to send back to javascript in the json encoded AJAX response
  * @param string|array|null meta keys to retrieve, if not specified all meta keys are retrieved
  * @return JSON encoded array with results, results include original request parameters
  */
 function _wpsc_add_customer_meta_to_response($response, $meta_keys = null, $meta_key = 'customer_meta')
 {
     if (!empty($meta_keys)) {
         if (!is_array($meta_keys)) {
             $meta_keys = array($meta_keys);
         }
     } else {
         $meta_keys = wpsc_checkout_unique_names();
     }
     $customer_meta = array();
     foreach ($meta_keys as $a_meta_key) {
         $customer_meta[$a_meta_key] = wpsc_get_customer_meta($a_meta_key);
     }
     $response[$meta_key] = $customer_meta;
     $response = apply_filters('wpsc_ajax_response_customer_meta', $response);
     return $response;
 }

 /**
  * @description: wpec_taxes_calculate_total - takes into account all tax logic
  *                   settings and returns the calculated total tax.
  *                   Expects wpsc_cart to be set.
  *
  * @param: void
  * @return: array containing total tax and rate if applicable
  * */
 function wpec_taxes_calculate_total()
 {
     //get the cart - NOTE: billing country is selected_country and shipping country is delivery_country
     global $wpsc_cart;
     //initialize return variable
     $returnable = array('total' => 0, 'rate' => 0);
     //check if tax is enabled
     if ($this->wpec_taxes->wpec_taxes_get_enabled()) {
         //run tax logic and calculate tax
         if ($this->wpec_taxes_run_logic()) {
             //get selected country code
             $wpec_selected_country = $this->wpec_taxes_retrieve_selected_country();
             //set tax region
             $region = $this->wpec_taxes_retrieve_region();
             //get the rate for the country and region if set
             $tax_rate = $this->wpec_taxes->wpec_taxes_get_rate($wpec_selected_country, $region);
             //start the total_tax off at 0
             $total_tax = 0;
             foreach ($wpsc_cart->cart_items as $cart_item) {
                 //if the tax is inclusive calculate vat
                 if ($this->wpec_taxes_isincluded()) {
                     //run wpec_taxes_calculate_included_tax
                     $taxes = $this->wpec_taxes_calculate_included_tax($cart_item);
                     $total_tax += $taxes['tax'];
                 } else {
                     //run wpec_taxes_calculate_excluded_tax
                     $taxes = $this->wpec_taxes_calculate_excluded_tax($cart_item, $tax_rate);
                     $total_tax += $taxes['tax'];
                 }
                 // if
             }
             // foreach
             $free_shipping = false;
             $coupon_num = wpsc_get_customer_meta('coupon');
             if ($coupon_num) {
                 $coupon = new wpsc_coupons($coupon_num);
                 $free_shipping = $coupon->is_percentage == '2';
             }
             // minus coupon tax if we are using coupons, but make sure the coupon is not a free shipping coupon
             /* Iterative note: In a future implementation, we'll allow for coupons to either apply to taxes, or not */
             /* The default logic to date has been that they do, which is generally improper, and there's a logic bug here as well */
             /* @link: https://github.com/wp-e-commerce/WP-e-Commerce/issues/170 */
             if ($wpsc_cart->coupons_amount > 0 && !$free_shipping) {
                 if ($this->wpec_taxes_isincluded()) {
                     $coupon_tax = $this->wpec_taxes_calculate_tax($wpsc_cart->coupons_amount, $tax_rate['rate'], false);
                 } else {
                     $coupon_tax = $this->wpec_taxes_calculate_tax($wpsc_cart->coupons_amount, $tax_rate['rate']);
                 }
                 /* Only subtract if coupons apply to tax.  Likely in 4.0 */
                 /* $total_tax -= $coupon_tax; */
             }
             //add shipping tax if set
             if ($tax_rate['shipping'] && !$free_shipping) {
                 if ($this->wpec_taxes_isincluded()) {
                     $total_tax += $this->wpec_taxes_calculate_tax($wpsc_cart->calculate_total_shipping(), $tax_rate['rate'], false);
                 } else {
                     $total_tax += $this->wpec_taxes_calculate_tax($wpsc_cart->calculate_total_shipping(), $tax_rate['rate']);
                 }
             }
             // if
             $returnable = array('total' => $total_tax);
             if (!$this->wpec_taxes_isincluded() && isset($tax_rate['rate'])) {
                 $returnable['rate'] = $tax_rate['rate'];
             }
             // if
         }
         // if
     }
     //if
     return $returnable;
 }

/**
 * Merge cart from anonymous user with cart from logged in user
 *
 * @since 3.8.13
 * @access private
 */
function _wpsc_merge_cart()
{
    $id_from_wp_user = get_user_meta(get_current_user_id(), _wpsc_get_visitor_meta_key('visitor_id'), true);
    if (empty($id_from_wp_user)) {
        return;
    }
    do_action('_wpsc_merge_cart', $id_from_wp_user);
    $id_from_customer_meta = wpsc_get_customer_meta('merge_cart_vistor_id');
    wpsc_delete_customer_meta('merge_cart_vistor_id');
    $old_cart = wpsc_get_customer_cart($id_from_customer_meta);
    $items = $old_cart->get_items();
    $new_cart = wpsc_get_customer_cart($id_from_wp_user);
    // first of all empty the old cart so that the claimed stock and related
    // hooks are released
    $old_cart->empty_cart();
    // add each item to the new cart
    foreach ($items as $item) {
        $new_cart->set_item($item->product_id, array('quantity' => $item->quantity, 'variation_values' => $item->variation_values, 'custom_message' => $item->custom_message, 'provided_price' => $item->provided_price, 'time_requested' => $item->time_requested, 'custom_file' => $item->custom_file, 'is_customisable' => $item->is_customisable, 'meta' => $item->meta, 'item_meta' => $item->get_meta()));
    }
    wpsc_update_customer_cart($new_cart);
    // The old profile is no longer needed
    _wpsc_abandon_temporary_customer_profile($id_from_customer_meta);
}

 /**
  * returns shipping quotes using this shipping module.
  *
  * @return array collection of rates applicable.
  */
 function getQuote()
 {
     global $wpdb, $wpsc_cart;
     if (wpsc_get_customer_meta('nzshpcart')) {
         $shopping_cart = wpsc_get_customer_meta('nzshpcart');
     }
     if (is_object($wpsc_cart)) {
         $price = $wpsc_cart->calculate_subtotal(true);
     }
     $layers = get_option('table_rate_layers');
     if ($layers != '') {
         // At some point we should probably remove this as the sorting should be
         // done when we save the data to the database. But need to leave it here
         // for people who have non-sorted settings in their database
         krsort($layers);
         foreach ($layers as $key => $shipping) {
             if ($price >= (double) $key) {
                 if (stristr($shipping, '%')) {
                     // Shipping should be a % of the cart total
                     $shipping = str_replace('%', '', $shipping);
                     $shipping_amount = $price * ($shipping / 100);
                 } else {
                     // Shipping is an absolute value
                     $shipping_amount = $shipping;
                 }
                 return array(__("Table Rate", 'wpsc') => $shipping_amount);
             }
         }
         $shipping = array_shift($layers);
         if (stristr($shipping, '%')) {
             $shipping = str_replace('%', '', $shipping);
             $shipping_amount = $price * ($shipping / 100);
         } else {
             $shipping_amount = $shipping;
         }
         return array(__("Table Rate", 'wpsc') => $shipping_amount);
     }
 }

 /**
  * submit method, sends the received data to the payment gateway
  * @access public
  */
 function submit()
 {
     $paymentAmount = $this->cart_data['total_price'];
     wpsc_update_customer_meta('paypal_express_converted_amount', $this->convert($paymentAmount));
     wpsc_update_customer_meta('paypal_express_original_amount', $paymentAmount);
     wpsc_update_customer_meta('paypal_express_sessionid', $this->cart_data['session_id']);
     $currencyCodeType = $this->get_paypal_currency_code();
     $paymentType = "Sale";
     if (get_option('permalink_structure') != '') {
         $separator = "?";
     } else {
         $separator = "&";
     }
     $transact_url = get_option('transact_url');
     $returnURL = $transact_url . $separator . "sessionid=" . $this->cart_data['session_id'] . "&gateway=paypal";
     $cancelURL = get_option('shopping_cart_url');
     $resArray = $this->CallShortcutExpressCheckout(wpsc_get_customer_meta('paypal_express_converted_amount'), $currencyCodeType, $paymentType, $returnURL, $cancelURL);
     $ack = strtoupper($resArray["ACK"]);
     if ($ack == "SUCCESS") {
         $this->RedirectToPayPal($resArray["TOKEN"]);
     } else {
         //Display a user friendly Error on the page using any of the following error information returned by PayPal
         $ErrorCode = urldecode($resArray["L_ERRORCODE0"]);
         $ErrorShortMsg = urldecode($resArray["L_SHORTMESSAGE0"]);
         $ErrorLongMsg = urldecode($resArray["L_LONGMESSAGE0"]);
         $ErrorSeverityCode = urldecode($resArray["L_SEVERITYCODE0"]);
         echo "SetExpressCheckout API call failed. ";
         echo "<br />Detailed Error Message: " . $ErrorLongMsg;
         echo "<br />Short Error Message: " . $ErrorShortMsg;
         echo "<br />Error Code: " . $ErrorCode;
         echo "<br />Error Severity Code: " . $ErrorSeverityCode;
     }
     exit;
 }

/**
 * Get the current values for checkout meta
 *
 * @since 3.8.14
 * @access private
 *
 * @param array values being readied to send back to javascript in the json encoded AJAX response
 * @param string|array|null meta keys to retrieve, if not specified all meta keys are retrieved
 * @return JSON encoded array with results, results include original request parameters
 */
function _wpsc_get_checkout_meta($meta_keys = null)
{
    if (!empty($meta_keys)) {
        if (!is_array($meta_keys)) {
            $meta_keys = array($meta_keys);
        }
    } else {
        $meta_keys = wpsc_checkout_unique_names();
    }
    $checkout_meta = array();
    foreach ($meta_keys as $a_meta_key) {
        $checkout_meta[$a_meta_key] = wpsc_get_customer_meta($a_meta_key);
    }
    return $checkout_meta;
}

/**
 * function to provide deprecated variables to older shipping modules
 *
 * @since 3.8.14
 */
function wpsc_deprecated_vars_for_shipping($wpsc_cart)
{
    // extracted from the Instinct fedex module
    $_POST['country'] = wpsc_get_customer_meta('shippingcountry');
    $_POST['region'] = wpsc_get_customer_meta('shippingregion');
    $_POST['zipcode'] = wpsc_get_customer_meta('shippingpostcode');
}

    /**
     * General entry point for WPEC external shipping calculator
     * This function expects no arguments but requires POST data
     * and configuration from the plugin settings
     * @return array $rate_table List of rates in "Service"=>"Rate" format
     */
    function getQuote()
    {
        global $wpdb, $wpec_ash, $wpec_ash_tools, $wpsc_cart;
        $data = array();
        //************** These values are common to all entry points **************
        //*** User/Customer Entered Values ***\\
        //*** Set up the destination country ***\
        $data["dest_country"] = wpsc_get_customer_meta('shi