fixes #390, #346 Cart: retain price when switching languages props mw…

…eimerskirch

src/Hyyan/WPI/Cart.php

@@ -11,6 +11,7 @@
 namespace Hyyan\WPI;
 
 use Hyyan\WPI\Product\Variation;
+use Hyyan\WPI\Product\Meta;
 use Hyyan\WPI\Utilities;
 
 /**
@@ -105,6 +106,25 @@ public function translateCartItemProduct($cart_item_data, $cart_item)
                 break;
         }
 
+
+        // If we are changing the product to the right language
+        if ( $cart_item_data_translation->get_id() != $cart_item_data->get_id() ) {
+          // Keep the price that's currently saved in the cart,
+          // because it might have been modified using the
+          // "woocommerce_before_calculate_totals" filter
+          // (unless the shop admin has explicitly turned off price synchronisation options)
+          $metas = Meta::getDisabledProductMetaToCopy();
+          if ( ! in_array( '_regular_price', $metas ) ) {
+            $cart_item_data_translation->set_regular_price( $cart_item_data->get_regular_price() );
+          }
+          if ( ! in_array( '_sale_price', $metas ) ) {
+            $cart_item_data_translation->set_sale_price( $cart_item_data->get_sale_price() );
+          }
+          if ( ! in_array( '_price', $metas ) ) {
+            $cart_item_data_translation->set_price( $cart_item_data->get_price() );
+          }
+        }
+
         return $cart_item_data_translation;
     }