/**
  * Render the price calculator on the product page
  *
  * @since 3.0
  */
 public function render_price_calculator()
 {
     global $product, $wc_measurement_price_calculator;
     // is the calculator enabled for this product?
     if (!$product || !WC_Price_Calculator_Product::calculator_enabled($product)) {
         return;
     }
     $settings = new WC_Price_Calculator_Settings($product);
     if (WC_Price_Calculator_Product::pricing_calculator_enabled($product)) {
         // Pricing calculator with custom dimensions and a price "per unit"
         // get the product total measurement (ie Area or Volume, etc)
         $product_measurement = WC_Price_Calculator_Product::get_product_measurement($product, $settings);
         $product_measurement->set_unit($settings->get_pricing_unit());
         // get the product measurements, get a measurement, and set the product total measurement common unit based on the measurements common unit
         $measurements = $settings->get_calculator_measurements();
         list($measurement) = $measurements;
         $product_measurement->set_common_unit($measurement->get_unit_common());
         // pricing calculator enabled, get the template
         wc_get_template('single-product/price-calculator.php', array('product_measurement' => $product_measurement, 'settings' => $settings, 'measurements' => $measurements), '', $wc_measurement_price_calculator->get_plugin_path() . '/templates/');
         // need an element to contain the price for simple pricing rule products
         if ($product->is_type('simple') && $settings->pricing_rules_enabled()) {
             echo '<div class="single_variation"></div>';
         }
     } else {
         // quantity calculator.  where the quantity of product needed is based on the configured product dimensions.  This is a actually bit more complex
         // get the starting quantity, max quantity, and total product measurement in product units
         $quantity_range = WC_Price_Calculator_Product::get_quantity_range($product);
         // set the product measurement based on the minimum quantity value, and set the unit to the frontend calculator unit
         $measurements = $settings->get_calculator_measurements();
         // The product measurement will be used to create the 'amount actual' field.
         $product_measurement = WC_Price_Calculator_Product::get_product_measurement($product, $settings);
         // see whether all calculator measurements are defined in the same units (ie 'in', 'sq. in.' are considered the same)
         $measurements_unit = null;
         foreach ($measurements as $measurement) {
             if (!$measurements_unit) {
                 $measurements_unit = $measurement->get_unit();
             } else {
                 if (!WC_Price_Calculator_Measurement::compare_units($measurements_unit, $measurement->get_unit())) {
                     $measurements_unit = false;
                     break;
                 }
             }
         }
         // All calculator measurements use the same base units, so lets use those for the 'amount actual' field
         //  area/volume product measurement can have a calculator measurement defined in units of length, so it
         //  will need to be converted to units of area or volume respectively
         if ($measurements_unit) {
             switch ($product_measurement->get_type()) {
                 case 'area':
                     $measurements_unit = WC_Price_Calculator_Measurement::to_area_unit($measurements_unit);
                     break;
                 case 'volume':
                     $measurements_unit = WC_Price_Calculator_Measurement::to_volume_unit($measurements_unit);
                     break;
             }
         }
         // if the price per unit is displayed for this product, default to the pricing units for the 'amount actual' field
         if (WC_Price_Calculator_Product::pricing_per_unit_enabled($product)) {
             $measurements_unit = $settings->get_pricing_unit();
         }
         // if a measurement unit other than the default was determined, set it
         if ($measurements_unit) {
             $product_measurement->set_unit($measurements_unit);
         }
         $total_price = '';
         if ($product->is_type('simple')) {
             // If the product type is simple we can set an initial 'Amount Actual' and 'total price'
             //  we can't do this for variable products because we don't know which will be configured
             //  initially (actually I guess a default product can be configured, so maybe we can do something here)
             // not enough product physical attributes defined to get our measurement, so bail
             if (!$product_measurement->get_value()) {
                 return;
             }
             // figure out the starting measurement amount
             // multiply the starting quantity by the measurement value
             $product_measurement->set_value(round($quantity_range['min_value'] * $product_measurement->get_value(), 2));
             $total_price = wc_price($quantity_range['min_value'] * $product->get_price(), 2);
         } elseif ($product->is_type('variable')) {
             // clear the product measurement value for variable products, since we can't really know what it is ahead of time (except for when a default is set)
             $product_measurement->set_value('');
         }
         // pricing calculator enabled, get the template
         wc_get_template('single-product/quantity-calculator.php', array('calculator_type' => $settings->get_calculator_type(), 'product_measurement' => $product_measurement, 'measurements' => $measurements, 'total_price' => $total_price), '', $wc_measurement_price_calculator->get_plugin_path() . '/templates/');
     }
 }
 /**
  * Turn the cart item data into human-readable key/value pairs for
  * display in the cart
  *
  * @since 3.0
  * @param array $item cart item
  * @param array $cart_item_data the cart item data
  * @return array human-readable cart item data
  */
 private function humanize_cart_item_data($item, $cart_item_data)
 {
     $new_cart_item_data = array();
     // always need the actual parent product, not the useless variation product
     $product = isset($item['variation_id']) && $item['variation_id'] ? wc_get_product($item['product_id']) : $item['data'];
     $settings = new WC_Price_Calculator_Settings($product);
     foreach ($settings->get_calculator_measurements() as $measurement) {
         if (isset($cart_item_data[$measurement->get_name()])) {
             // if the measurement has a set of available options, get the option label for display, if we can determine it
             //  (this way we display "1/8" rather than "0.125", etc)
             if (count($measurement->get_options()) > 0) {
                 foreach ($measurement->get_options() as $value => $label) {
                     if ($cart_item_data[$measurement->get_name()] === $value) {
                         $cart_item_data[$measurement->get_name()] = $label;
                     }
                 }
             }
             $label = $measurement->get_unit_label() ? sprintf("%s (%s)", $measurement->get_label(), __($measurement->get_unit_label(), WC_Measurement_Price_Calculator::TEXT_DOMAIN)) : __($measurement->get_label(), WC_Measurement_Price_Calculator::TEXT_DOMAIN);
             $new_cart_item_data[$label] = $cart_item_data[$measurement->get_name()];
         }
     }
     // render the total measurement if this is a derived calculator (ie "Area (sq. ft.): 10" if the calculator is Area (LxW))
     if ($settings->is_calculator_type_derived() && isset($cart_item_data['_measurement_needed'])) {
         // get the product total measurement (ie area or volume)
         $product_measurement = WC_Price_Calculator_Product::get_product_measurement($product, $settings);
         $product_measurement->set_unit($cart_item_data['_measurement_needed_unit']);
         $product_measurement->set_value($cart_item_data['_measurement_needed']);
         $total_amount_text = apply_filters('wc_measurement_price_calculator_total_amount_text', $product_measurement->get_unit_label() ? sprintf(__('Total %s (%s)', WC_Measurement_Price_Calculator::TEXT_DOMAIN), $product_measurement->get_label(), __($product_measurement->get_unit_label(), WC_Measurement_Price_Calculator::TEXT_DOMAIN)) : sprintf(__('Total %s', WC_Measurement_Price_Calculator::TEXT_DOMAIN), $product_measurement->get_label()), $item);
         $new_cart_item_data[$total_amount_text] = $product_measurement->get_value();
     }
     return $new_cart_item_data;
 }