Bug fixes and callbacks

* Added parcel callback support for the outfit store
* Added execute_callback wrapper function
* Fixed ball quest item never unlocking after receiving the outfit, soft-locking the game

game/scripts/shops/dress/chitchats.rpy

@@ -34,6 +34,8 @@ label purchase_outfit(item):
         maf "As you wish sweetie... It should be ready shortly."
         gen "Thank you." ("base", xpos="far_left", ypos="head")
     elif item == her_outfit_ball:
+        $ parcel_callbacks.append(renpy.curry(setattr)(ball_outfit_ITEM, "owned", 1))
+
         if not states.her.ev.yule_ball.e4_complete:
             gen "Could you make a dress for me?" ("base", xpos="far_left", ypos="head")
             maf "A dress? Do you mean something like a ball dress, or more burlesque?"

game/scripts/shops/dress/menu.rpy

@@ -27,6 +27,7 @@ label shop_dress_menu:
         store_cart = set()
         menu_items = shop_dress_sortfilter([x for x in category_items.get(current_category, []) if bool(x.unlocked == False and x.price > 0 and not x in store_cart)], current_sorting)
         current_item = next(iter(menu_items), None)
+        parcel_callbacks = []
 
     show screen shop_dress()
 
@@ -107,14 +108,17 @@ label shop_dress_menu:
             $ _tmp = "tomorrow" if transit_time == 1 else "in about {} days".format(str(transit_time))
             maf "You can expect a parcel [_tmp]."
 
-            $ Parcel(contents=[(k, 1) for k in store_cart], wait=transit_time).send()
+            # Executes callbacks upon receival of the parcel.
+            $ curry = renpy.curry(execute_callbacks)(parcel_callbacks) if parcel_callbacks else None
+            $ parcel_callbacks = []
+            $ Parcel(contents=[(k, 1) for k in store_cart], wait=transit_time, func=curry).send()
+            
             return
         else:
              gen "Nothing has caught my eye I'm afraid." ("base", xpos="far_left", ypos="head")
              maf "Maybe next time."
              return
 
-
     jump .after_init
 
 screen shop_dress():

game/scripts/utility/common_functions.rpy

@@ -222,3 +222,6 @@ init python early:
 
         def __len__(self):
             return len(self._callable())
+
+    def execute_callbacks(callbacks):
+        [callback() for callback in callbacks]