Made the shopping cart support dynamic item plugins

docs/changelog/7.x.x.txt

@@ -9,6 +9,8 @@
  - fix: Media Folder (perlDreamer Consulting, LLC)
  - fix: Cannot save new content filters.
  - fix: Cannot delete content filter.
+ - change: adapted WebGUI::Commerce::ShoppingCart to make it capable of 
+        handling dynamic item plugins. (Martin Kamerbeek / Oqapi)
 
 7.3.4
  - fix: SQLForm - cannot add new asset (Martin Kamerbeek / Oqapi)

lib/WebGUI/Commerce/ShoppingCart.pm

@@ -80,6 +80,10 @@ sub add {
 
 	$item = WebGUI::Commerce::Item->new($self->session,$itemId, $itemType);
 	return "" unless ($item->available);
+
+	# Fetch the itemId from the item plugin in stead of the given parameter.
+	# This allows item plugins to dynamically create new items.
+	$itemId = $item->id;
 	
 	$self->{_items}{$itemId."_".$itemType} = {
 		itemId		=> $itemId,