From 151a04909a4d894d498fbac586059e359c70dbd7 Mon Sep 17 00:00:00 2001
From: GenevensiS <66968533+G-e-n-e-v-e-n-s-i-S@users.noreply.github.com>
Date: Wed, 13 May 2026 18:09:56 +0200
Subject: [PATCH] Add update_cards_scripts

---
 src/data/action/set.cpp                      | 25 ++++++++
 src/data/action/set.hpp                      | 12 ++++
 src/data/action/value.cpp                    |  6 +-
 src/data/add_cards_script.cpp                | 14 +++--
 src/data/card.cpp                            | 40 +++++++++++-
 src/data/card.hpp                            |  6 +-
 src/data/game.cpp                            |  9 ++-
 src/data/game.hpp                            | 44 ++++++-------
 src/data/keyword.cpp                         |  1 -
 src/data/set.cpp                             | 65 +++++++++++++++++---
 src/data/set.hpp                             |  6 +-
 src/data/stylesheet.cpp                      |  8 ++-
 src/data/stylesheet.hpp                      | 14 +++--
 src/data/symbol_font.cpp                     |  1 -
 src/data/update_cards_script.cpp             | 57 +++++++++++++++++
 src/data/update_cards_script.hpp             | 39 ++++++++++++
 src/gui/control/card_list.cpp                |  6 +-
 src/script/functions/construction.cpp        | 14 +++--
 src/script/functions/construction_helper.hpp | 16 ++++-
 src/script/functions/json.cpp                |  3 +-
 src/util/delayed_index_maps.hpp              | 15 +++++
 src/util/index_map.hpp                       |  6 +-
 src/util/io/reader.cpp                       |  2 +-
 src/util/io/reader.hpp                       |  4 +-
 src/util/version.cpp                         | 49 +++++++--------
 src/util/version.hpp                         | 49 +++++++++++----
 26 files changed, 403 insertions(+), 108 deletions(-)
 create mode 100644 src/data/update_cards_script.cpp
 create mode 100644 src/data/update_cards_script.hpp

diff --git a/src/data/action/set.cpp b/src/data/action/set.cpp
index 07ab9bf0..28b06de3 100644
--- a/src/data/action/set.cpp
+++ b/src/data/action/set.cpp
@@ -87,6 +87,31 @@ void AddCardAction::perform(bool to_undo) {
   set.buildUIDMap();
 }
 
+UpdateCardAction::UpdateCardAction(Set& set, const vector<CardP>& cards_to_add, const vector<CardP>& cards_to_remove)
+  : CardListAction(set)
+  , action_add(ADD, set, cards_to_add)
+  , action_remove(REMOVE, set, cards_to_remove)
+{}
+
+String UpdateCardAction::getName(bool to_undo) const {
+  return _ACTION_("update card");
+}
+
+void UpdateCardAction::perform(bool to_undo) {
+  if (to_undo) {
+    action_remove.perform(to_undo);
+    set.actions.tellListeners(action_remove, to_undo);
+    action_add.perform(to_undo);
+    set.actions.tellListeners(action_add, to_undo);
+  }
+  else {
+    action_add.perform(to_undo);
+    set.actions.tellListeners(action_add, to_undo);
+    action_remove.perform(to_undo);
+    set.actions.tellListeners(action_remove, to_undo);
+  }
+}
+
 // ----------------------------------------------------------------------------- : Reorder cards
 
 ReorderCardsAction::ReorderCardsAction(Set& set, size_t card_id1, size_t card_id2)
diff --git a/src/data/action/set.hpp b/src/data/action/set.hpp
index 6d09e84e..88729bcb 100644
--- a/src/data/action/set.hpp
+++ b/src/data/action/set.hpp
@@ -50,6 +50,18 @@ public:
   vector<ActionP> card_link_actions;
 };
 
+/// Update one or more cards from a set by replacing them with other cards
+class UpdateCardAction : public CardListAction {
+public:
+  UpdateCardAction(Set& set, const vector<CardP>& cards_to_add, const vector<CardP>& cards_to_remove);
+
+  String getName(bool to_undo) const override;
+  void perform(bool to_undo) override;
+
+  AddCardAction action_add;
+  AddCardAction action_remove;
+};
+
 // ----------------------------------------------------------------------------- : Reorder cards
 
 /// Change the position of a card in the card list by swapping two cards
diff --git a/src/data/action/value.cpp b/src/data/action/value.cpp
index 8a3f3e08..d065f0d6 100644
--- a/src/data/action/value.cpp
+++ b/src/data/action/value.cpp
@@ -400,8 +400,10 @@ String BulkAction::getName(bool to_undo) const {
   return to_undo ? name_undo : name_do;
 }
 
-void BulkAction::perform(bool to_undo) {
-  FOR_EACH(action, actions) {
+void BulkAction::perform(bool to_undo) {
+  size_t size = actions.size();
+  for (size_t i = 0 ; i < size ; ++i) {
+    ActionP& action = actions[to_undo ? size - i - 1 : i];
     action->perform(to_undo);
     set->actions.tellListeners(*action, to_undo);
   }
diff --git a/src/data/add_cards_script.cpp b/src/data/add_cards_script.cpp
index 94301c9a..cfd51571 100644
--- a/src/data/add_cards_script.cpp
+++ b/src/data/add_cards_script.cpp
@@ -25,18 +25,22 @@ IMPLEMENT_REFLECTION_NO_SCRIPT(AddCardsScript) {
 
 void AddCardsScript::perform(Set& set, vector<CardP>& out) {
   // Perform script
-  Context& ctx = set.getContext();
+  Context& ctx = set.getContext();
+  if (enabled.hasBeenRead()) {
+    enabled.update(ctx);
+    if (!enabled()) return;
+  }
   ScriptValueP result = script.invoke(ctx);
   // Add cards to out
   ScriptValueP it = result->makeIterator();
   while (ScriptValueP item = it->next()) {
-    CardP card = from_script<CardP>(item);
+    CardP new_card = from_script<CardP>(item);
     // is this a new card?
-    if (contains(set.cards,card) || contains(out,card)) {
+    if (contains(set.cards,new_card) || contains(out,new_card)) {
       // make copy
-      card = make_intrusive<Card>(*card);
+      new_card = make_intrusive<Card>(&set, new_card);
     }
-    out.push_back(card);
+    out.push_back(new_card);
   }
 }
 
diff --git a/src/data/card.cpp b/src/data/card.cpp
index 5ad204d1..ab51a4e2 100644
--- a/src/data/card.cpp
+++ b/src/data/card.cpp
@@ -42,7 +42,38 @@ Card::Card(Game& game)
   , has_styling(false)
 {
   data.init(game.card_fields);
-}
+}
+
+Card::Card(Set* set, const CardP& card)
+  : game(card->game)
+  , time_created (wxDateTime::Now())
+  , time_modified(wxDateTime::Now())
+  , notes(card->notes)
+  , uid(generate_uid())
+  , linked_card_1(card->linked_card_1)
+  , linked_card_2(card->linked_card_2)
+  , linked_card_3(card->linked_card_3)
+  , linked_card_4(card->linked_card_4)
+  , linked_relation_1(card->linked_relation_1)
+  , linked_relation_2(card->linked_relation_2)
+  , linked_relation_3(card->linked_relation_3)
+  , linked_relation_4(card->linked_relation_4)
+  , has_styling(card->has_styling)
+  , stylesheet_version(card->stylesheet_version)
+  , stylesheet(card->stylesheet)
+{
+  if (!stylesheet && set) {
+    stylesheet = set->stylesheetForP(card);
+  }
+  if (has_styling) {
+    styling_data.cloneFrom(card->styling_data);
+  }
+  else {
+    if (stylesheet && set) styling_data.cloneFrom(set->stylingDataFor(*stylesheet));
+  }
+  data.cloneFrom(card->data);
+  extra_data.cloneFrom(card->extra_data);
+}
 
 String Card::identification() const {
   // an identifying field
@@ -344,7 +375,12 @@ void reflect_version_check(GetDefaultMember& handler, const Char* key, intrusive
 
 IMPLEMENT_REFLECTION(Card) {
   REFLECT(stylesheet);
-  reflect_version_check(handler, _("stylesheet_version"), stylesheet);
+  if (Handler::isReading) {
+    REFLECT_NO_SCRIPT(stylesheet_version);
+  }
+  else {
+    reflect_version_check(handler, _("stylesheet_version"), stylesheet);
+  }
   REFLECT(has_styling);
   if (has_styling) {
     if (stylesheet) {
diff --git a/src/data/card.hpp b/src/data/card.hpp
index 9dde8cb6..19ab0af2 100644
--- a/src/data/card.hpp
+++ b/src/data/card.hpp
@@ -35,6 +35,8 @@ public:
   Card();
   /// Creates a card using the given game
   Card(Game& game);
+  /// Copy constructor, makes a deep copy
+  Card(Set* set, const CardP& card);
 
   /// The game this card is made for
   Game* game;
@@ -60,7 +62,9 @@ public:
   wxDateTime time_created, time_modified;
   /// Alternative style to use for this card
   /** Optional; if not set use the card style from the set */
-  StyleSheetP stylesheet;
+  StyleSheetP stylesheet;
+  /// What version of the stylesheet was this card using when it was last saved?
+  Version stylesheet_version;
   /// Alternative options to use for this card, for this card's stylesheet
   /** Optional; if not set use the styling data from the set.
   *  If stylesheet is set then contains data for the this->stylesheet, otherwise for set->stylesheet
diff --git a/src/data/game.cpp b/src/data/game.cpp
index d9bb6883..1c0be291 100644
--- a/src/data/game.cpp
+++ b/src/data/game.cpp
@@ -16,6 +16,7 @@
 #include <data/pack.hpp>
 #include <data/word_list.hpp>
 #include <data/add_cards_script.hpp>
+#include <data/update_cards_script.hpp>
 #include <util/io/package_manager.hpp>
 #include <script/script.hpp>
 
@@ -55,7 +56,6 @@ IMPLEMENT_REFLECTION(Game) {
   REFLECT_NO_SCRIPT(json_paths);
   REFLECT_NO_SCRIPT(statistics_dimensions);
   REFLECT_NO_SCRIPT(statistics_categories);
-  REFLECT_COMPAT(<308, "pack_item", pack_types);
   REFLECT_NO_SCRIPT(pack_types);
   REFLECT_NO_SCRIPT(keyword_match_script);
   REFLECT(has_keywords);
@@ -63,7 +63,8 @@ IMPLEMENT_REFLECTION(Game) {
   REFLECT(keyword_parameter_types);
   REFLECT_NO_SCRIPT(keywords);
   REFLECT_NO_SCRIPT(word_lists);
-  REFLECT_NO_SCRIPT(add_cards_scripts);
+  REFLECT_NO_SCRIPT(add_cards_scripts);
+  REFLECT_NO_SCRIPT(update_cards_scripts);
   REFLECT_NO_SCRIPT(auto_replaces);
 }
 
@@ -205,7 +206,9 @@ void Game::validate(Version v) {
       }
       card_links_alt_names.emplace(linked_tr, linked_default);
     }
-  }
+  }
+  // sort the update_cards_scripts from oldest to newest
+  std::sort(update_cards_scripts.begin(), update_cards_scripts.end());
 }
 
 void Game::initCardListColorScript() {
diff --git a/src/data/game.hpp b/src/data/game.hpp
index f2f051ca..e48448f8 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -26,6 +26,7 @@ DECLARE_POINTER_TYPE(KeywordMode);
 DECLARE_POINTER_TYPE(Keyword);
 DECLARE_POINTER_TYPE(WordList);
 DECLARE_POINTER_TYPE(AddCardsScript);
+DECLARE_POINTER_TYPE(UpdateCardsScript);
 DECLARE_POINTER_TYPE(AutoReplace);
 
 // ----------------------------------------------------------------------------- : Game
@@ -38,27 +39,28 @@ class Game : public Packaged {
 public:
   Game();
   
-  OptionalScript          init_script;            ///< Script of variables available to other scripts in this game
-  vector<FieldP>          set_fields;             ///< Fields for set information
-  IndexMap<FieldP,StyleP> default_set_style;      ///< Default style for the set fields, because it is often the same
-  vector<FieldP>          card_fields;            ///< Fields on each card
-  vector<CardLinkP>       card_links;             ///< Possible links between cards
-  OptionalScript          card_list_color_script; ///< Script that determines the color of items in the card list
-  OptionalScript          import_script;          ///< Script applied as the last step of the new_card function
-  vector<String>          json_paths;             ///< Paths inside JSON files to find the card array
-  vector<StatsDimensionP> statistics_dimensions;  ///< (Additional) statistics dimensions
-  vector<StatsCategoryP>  statistics_categories;  ///< (Additional) statistics categories
-  vector<PackTypeP>       pack_types;             ///< Types of random card packs to generate
-  vector<WordListP>       word_lists;             ///< Word lists for editing with a drop down list
-  vector<AddCardsScriptP> add_cards_scripts;      ///< Scripts for adding multiple cards to the set
-  vector<AutoReplaceP>    auto_replaces;          ///< Things to autoreplace in textboxes
-  map<String,String>      card_fields_alt_names;  ///< Other names that fields might go by, for example in CSV files
-  map<String,String>      card_links_alt_names;   ///< Localized names that card links go by
-  bool                    has_keywords;           ///< Does this game use keywords?
-  OptionalScript          keyword_match_script;   ///< For the keyword editor
-  vector<KeywordParamP>   keyword_parameter_types;///< Types of keyword parameters
-  vector<KeywordModeP>    keyword_modes;          ///< Modes of keywords
-  vector<KeywordP>        keywords;               ///< Keywords for use in text
+  OptionalScript             init_script;            ///< Script of variables available to other scripts in this game
+  vector<FieldP>             set_fields;             ///< Fields for set information
+  IndexMap<FieldP,StyleP>    default_set_style;      ///< Default style for the set fields, because it is often the same
+  vector<FieldP>             card_fields;            ///< Fields on each card
+  vector<CardLinkP>          card_links;             ///< Possible links between cards
+  OptionalScript             card_list_color_script; ///< Script that determines the color of items in the card list
+  OptionalScript             import_script;          ///< Script applied as the last step of the new_card function
+  vector<String>             json_paths;             ///< Paths inside JSON files to find the card array
+  vector<StatsDimensionP>    statistics_dimensions;  ///< (Additional) statistics dimensions
+  vector<StatsCategoryP>     statistics_categories;  ///< (Additional) statistics categories
+  vector<PackTypeP>          pack_types;             ///< Types of random card packs to generate
+  vector<WordListP>          word_lists;             ///< Word lists for editing with a drop down list
+  vector<AddCardsScriptP>    add_cards_scripts;      ///< Scripts for adding multiple cards to the set
+  vector<UpdateCardsScriptP> update_cards_scripts;   ///< Scripts for updating cards made with an earlier version of this game
+  vector<AutoReplaceP>       auto_replaces;          ///< Things to autoreplace in textboxes
+  map<String,String>         card_fields_alt_names;  ///< Other names that fields might go by, for example in CSV files
+  map<String,String>         card_links_alt_names;   ///< Localized names that card links go by
+  bool                       has_keywords;           ///< Does this game use keywords?
+  OptionalScript             keyword_match_script;   ///< For the keyword editor
+  vector<KeywordParamP>      keyword_parameter_types;///< Types of keyword parameters
+  vector<KeywordModeP>       keyword_modes;          ///< Modes of keywords
+  vector<KeywordP>           keywords;               ///< Keywords for use in text
   
   Dependencies dependent_scripts_cards;           ///< scripts that depend on the card list
   Dependencies dependent_scripts_keywords;        ///< scripts that depend on the keywords
diff --git a/src/data/keyword.cpp b/src/data/keyword.cpp
index 4b489682..113e783e 100644
--- a/src/data/keyword.cpp
+++ b/src/data/keyword.cpp
@@ -85,7 +85,6 @@ bool Keyword::contains(QuickFilterPart const& query) const {
 
 IMPLEMENT_REFLECTION(Keyword) {
   REFLECT(keyword);
-  if (handler.formatVersion() < 301) read_compat(handler, this);
   REFLECT(match);
   REFLECT(reminder);
   REFLECT(rules);
diff --git a/src/data/set.cpp b/src/data/set.cpp
index a28bf9d4..c6d18e08 100644
--- a/src/data/set.cpp
+++ b/src/data/set.cpp
@@ -14,6 +14,7 @@
 #include <data/keyword.hpp>
 #include <data/pack.hpp>
 #include <data/field.hpp>
+#include <data/update_cards_script.hpp>
 #include <data/field/text.hpp>    // for 0.2.7 fix
 #include <data/field/information.hpp>
 #include <data/field/image.hpp>
@@ -172,7 +173,7 @@ void fix_value_207(const ValueP& value) {
 
 void Set::validate(Version file_app_version) {
   Packaged::validate(file_app_version);
-  // are the
+  // are the game and stylesheet defined?
   if (!game) {
     throw Error(_ERROR_1_("no game specified",_TYPE_("set")));
   }
@@ -183,7 +184,9 @@ void Set::validate(Version file_app_version) {
   if (stylesheet->game != game) {
     throw Error(_ERROR_("stylesheet and set refer to different game"));
   }
-
+
+  // We can probably retire this
+  /*
   // This is our chance to fix version incompatabilities
   if (file_app_version < 207) {
     // Since 0.2.7 we use </tag> style close tags, in older versions it was </>
@@ -192,16 +195,52 @@ void Set::validate(Version file_app_version) {
       FOR_EACH(v, c->data) fix_value_207(v);
     }
     FOR_EACH(v, data) fix_value_207(v);
-/*    FOR_EACH(s, styleData) {
+    FOR_EACH(s, styleData) {
       FOR_EACH(v, s.second->data) fix_value_207(v);
     }
-*/  }
+  }
+  */
+
   // we want at least one card
   if (cards.empty()) cards.push_back(make_intrusive<Card>(*game));
   // update scripts
   script_manager->updateAll();
   // build uid map
-  buildUIDMap();
+  buildUIDMap();
+  // update cards with game update_cards_scripts
+  for (int j = 0; j < game->update_cards_scripts.size(); ++j) {
+    UpdateCardsScriptP& script = game->update_cards_scripts[j];
+    if (game_version >= script->before_version) continue;
+    size_t size = cards.size();
+    for (int i = 0; i < size; ++i) {
+      CardP& card = cards[i];
+      vector<CardP> new_cards = script->perform(*this, card);
+      if (!new_cards.empty()) {
+        --i;
+        --size;
+      }
+    }
+  }
+  // update cards with stylesheet update_cards_scripts
+  for (int i = 0; i < cards.size(); ++i) {
+    CardP& card = cards[i];
+    StyleSheetP stylesheet = stylesheetForP(card);
+    for (int j = 0; j < stylesheet->update_cards_scripts.size(); ++j) {
+      UpdateCardsScriptP& script = stylesheet->update_cards_scripts[j];
+      if (card->stylesheet_version >= script->before_version) continue;
+      vector<CardP> new_cards = script->perform(*this, card);
+      if (!new_cards.empty()) {
+        FOR_EACH(new_card, new_cards) {
+          // Initialize the stylesheet_version if it wasn't defined, to prevent this script from applying again
+          if (stylesheet == stylesheetForP(new_card) && new_card->stylesheet_version < script->before_version) {
+            new_card->stylesheet_version = script->before_version;
+          }
+        }
+        --i;
+        break;
+      }
+    }
+  }
 }
 
 void reflect_version_check(Reader& handler, const Char* key, intrusive_ptr<Packaged> const& package) {
@@ -225,15 +264,23 @@ IMPLEMENT_REFLECTION(Set) {
     REFLECT_IF_READING {
       data.init(game->set_fields);
     }
-    reflect_version_check(handler, _("game_version"), game);
+    if (Handler::isReading) {
+      REFLECT_NO_SCRIPT(game_version);
+    }
+    else {
+      reflect_version_check(handler, _("game_version"), game);
+    }
     WITH_DYNAMIC_ARG(game_for_reading, game.get());
     REFLECT(stylesheet);
-    REFLECT_COMPAT(<300, "style", stylesheet);
-    reflect_version_check(handler, _("stylesheet_version"), stylesheet);
+    if (Handler::isReading) {
+      REFLECT_NO_SCRIPT(stylesheet_version);
+    }
+    else {
+      reflect_version_check(handler, _("stylesheet_version"), stylesheet);
+    }
     WITH_DYNAMIC_ARG(stylesheet_for_reading, stylesheet.get());
     REFLECT_N("set_info", data);
     if (stylesheet) {
-      REFLECT_COMPAT(<300, "extra_set_info", styling_data);
       REFLECT_N("styling", styling_data);
     }
     // Experimental: save each card to a different file
diff --git a/src/data/set.hpp b/src/data/set.hpp
index 44c2d467..5bae5706 100644
--- a/src/data/set.hpp
+++ b/src/data/set.hpp
@@ -61,7 +61,11 @@ public:
   ActionStack                     actions;           ///< Actions performed on this set and the cards in it
   KeywordDatabase                 keyword_db;        ///< Database for matching keywords, must be cleared when keywords change
   VCSP                            vcs;               ///< The version control system to use
-  
+  /// What version of the game was this set using when it was last saved?
+  Version                         game_version;
+  /// What version of the default stylesheet was this set using when it was last saved?
+  Version                         stylesheet_version;
+
   /// A context for performing scripts
   /** Should only be used from the main thread! */
   Context& getContext();
diff --git a/src/data/stylesheet.cpp b/src/data/stylesheet.cpp
index ad57d428..a06a13c8 100644
--- a/src/data/stylesheet.cpp
+++ b/src/data/stylesheet.cpp
@@ -10,6 +10,7 @@
 #include <data/stylesheet.hpp>
 #include <data/game.hpp>
 #include <data/field.hpp>
+#include <data/update_cards_script.hpp>
 #include <util/io/package_manager.hpp>
 #include <gui/new_window.hpp> // for selecting stylesheets on load error
 
@@ -75,7 +76,11 @@ void StyleSheet::validate(Version ver) {
     throw Error(_ERROR_1_("no game specified",_TYPE_("stylesheet")));
   }
   // a stylesheet depends on the game it is made for
-  requireDependency(game.get());
+  requireDependency(game.get());
+  // sort the update_cards_scripts from oldest to newest
+  std::sort(update_cards_scripts.begin(), update_cards_scripts.end(), [](const auto& a, const auto& b) {
+    return *a < *b;
+  });
 }
 
 
@@ -125,6 +130,7 @@ IMPLEMENT_REFLECTION(StyleSheet) {
     extra_card_style.init(extra_card_fields);
   }
   REFLECT(extra_card_style);
+  REFLECT_NO_SCRIPT(update_cards_scripts);
 }
 
 
diff --git a/src/data/stylesheet.hpp b/src/data/stylesheet.hpp
index 638ec88b..30361131 100644
--- a/src/data/stylesheet.hpp
+++ b/src/data/stylesheet.hpp
@@ -22,6 +22,7 @@ DECLARE_POINTER_TYPE(StyleSheet);
 DECLARE_POINTER_TYPE(Field);
 DECLARE_POINTER_TYPE(Style);
 DECLARE_POINTER_TYPE(CardRegion);
+DECLARE_POINTER_TYPE(UpdateCardsScript);
 
 // ----------------------------------------------------------------------------- : StyleSheet
 
@@ -33,12 +34,13 @@ class StyleSheet : public Packaged {
 public:
   StyleSheet();
   
-  GameP game;            ///< The game this stylesheet is made for
-  OptionalScript init_script;    ///< Script of variables available to other scripts in this stylesheet
-  double card_width;        ///< The width of a card in pixels
-  double card_height;        ///< The height of a card in pixels
-  double card_dpi;        ///< The resolution of a card in dots per inch
-  Color  card_background;      ///< The background color of cards
+  GameP game;                                      ///< The game this stylesheet is made for
+  OptionalScript init_script;                      ///< Script of variables available to other scripts in this stylesheet
+  vector<UpdateCardsScriptP> update_cards_scripts; ///< Scripts for updating cards made with an earlier version of this stylesheet
+  double card_width;                               ///< The width of a card in pixels
+  double card_height;                              ///< The height of a card in pixels
+  double card_dpi;                                 ///< The resolution of a card in dots per inch
+  Color  card_background;                          ///< The background color of cards
   vector<CardRegionP> card_regions;
   /// The styling for card fields
   /** The indices should correspond to the card_fields in the Game */
diff --git a/src/data/symbol_font.cpp b/src/data/symbol_font.cpp
index 676ab294..96400b06 100644
--- a/src/data/symbol_font.cpp
+++ b/src/data/symbol_font.cpp
@@ -178,7 +178,6 @@ IMPLEMENT_REFLECTION(SymbolInFont) {
   REFLECT(draw_text);
   REFLECT(text_font);
   REFLECT(text_alignment);
-  REFLECT_COMPAT(<300,"text_align",text_alignment);
   REFLECT(text_margin_left);
   REFLECT(text_margin_right);
   REFLECT(text_margin_top);
diff --git a/src/data/update_cards_script.cpp b/src/data/update_cards_script.cpp
new file mode 100644
index 00000000..83171ab1
--- /dev/null
+++ b/src/data/update_cards_script.cpp
@@ -0,0 +1,57 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make card games                |
+//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <data/update_cards_script.hpp>
+#include <data/action/set.hpp>
+#include <data/set.hpp>
+#include <data/card.hpp>
+#include <data/stylesheet.hpp>
+#include <data/action/value.hpp>
+
+// ----------------------------------------------------------------------------- : UpdateCardsScript
+
+IMPLEMENT_REFLECTION_NO_SCRIPT(UpdateCardsScript) {
+  REFLECT(before_version);
+  REFLECT(description);
+  REFLECT(enabled);
+  REFLECT(script);
+}
+
+
+void UpdateCardsScript::perform(Set& set, CardP& card, vector<CardP>& out) {
+  // Perform script
+  Context& ctx = set.getContext(card);
+  if (enabled.hasBeenRead()) {
+    enabled.update(ctx);
+    if (!enabled()) return;
+  }
+  ScriptValueP result = script.invoke(ctx);
+  // Add cards to out
+  ScriptValueP it = result->makeIterator();
+  while (ScriptValueP item = it->next()) {
+    CardP new_card = from_script<CardP>(item);
+    // is this a new card?
+    if (contains(set.cards,new_card) || contains(out,new_card)) {
+      // make copy
+      new_card = make_intrusive<Card>(&set, new_card);
+    }
+    out.push_back(new_card);
+  }
+}
+
+vector<CardP> UpdateCardsScript::perform(Set& set, CardP card) {
+  // Perform script
+  vector<CardP> cards;
+  perform(set, card, cards);
+  // Add to set
+  if (!cards.empty()) {
+    set.actions.addAction(make_unique<UpdateCardAction>(set, cards, vector<CardP>{card}), false);
+  }
+  return cards;
+}
diff --git a/src/data/update_cards_script.hpp b/src/data/update_cards_script.hpp
new file mode 100644
index 00000000..0abd0404
--- /dev/null
+++ b/src/data/update_cards_script.hpp
@@ -0,0 +1,39 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make card games                |
+//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#pragma once
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <script/scriptable.hpp>
+
+class Set;
+DECLARE_POINTER_TYPE(Card);
+
+// ----------------------------------------------------------------------------- : UpdateCardsScript
+
+/// A script to add one or more cards to a set
+class UpdateCardsScript : public IntrusivePtrBase<UpdateCardsScript> {
+public:
+  Version          before_version;
+  String           description;
+  Scriptable<bool> enabled;
+  OptionalScript   script;
+
+  bool operator < (const UpdateCardsScript& other) const {
+    return before_version < other.before_version;
+  }
+
+  /// Perform the script; return the cards (if any)
+  void perform(Set& set, CardP& card, vector<CardP>& out);
+  /// Perform the script; add cards to the set
+  vector<CardP> perform(Set& set, CardP card); // don't use CardP& here, because set.cards may get reallocated which would invalidate the ref
+  
+  DECLARE_REFLECTION();
+};
+
+
diff --git a/src/gui/control/card_list.cpp b/src/gui/control/card_list.cpp
index 82da0726..ec97b10e 100644
--- a/src/gui/control/card_list.cpp
+++ b/src/gui/control/card_list.cpp
@@ -376,12 +376,12 @@ bool CardListBase::parseText(String& text, vector<CardP>& out) {
       if (ScriptCustomCollection* custom = dynamic_cast<ScriptCustomCollection*>(sv.get())) {
         for (size_t i = 0; i < custom->value.size(); i++) {
           if (ScriptObject<CardP>* c = dynamic_cast<ScriptObject<CardP>*>(custom->value[i].get())) {
-            out.push_back(make_intrusive<Card>(*c->getValue()));
+            out.push_back(c->getValue());
           }
         }
       }
-    } else if (ScriptObject<CardP>* c = dynamic_cast<ScriptObject<CardP>*>(sv.get())) {
-      out.push_back(make_intrusive<Card>(*c->getValue()));
+    } else if (ScriptObject<CardP>* c = dynamic_cast<ScriptObject<CardP>*>(sv.get())) {
+      out.push_back(c->getValue());
     }
   } catch (...) {}
   
diff --git a/src/script/functions/construction.cpp b/src/script/functions/construction.cpp
index c65d5dab..a451a147 100644
--- a/src/script/functions/construction.cpp
+++ b/src/script/functions/construction.cpp
@@ -26,11 +26,13 @@
 
 SCRIPT_FUNCTION(new_card) {
   SCRIPT_PARAM(GameP, game);
+  ScriptValueP set_ = ctx.getVariableOpt(BOOST_PP_CAT(L, "set")); // this is just SCRIPT_OPTIONAL_PARAM_(Set*, set) but the macro fails
+  Set* set = set_ && set_ != script_nil ? from_script<Set*>(set_, BOOST_PP_CAT(L, "set")) : nullptr;
   SCRIPT_OPTIONAL_PARAM_(bool, ignore_field_not_found);
-  // create a new card object
-  CardP new_card = make_intrusive<Card>(*game);
-  // iterate on the given key/value pairs
+  SCRIPT_OPTIONAL_PARAM_(CardP, copy_from);
   SCRIPT_PARAM(ScriptValueP, input);
+  // create a new card object, or a copy
+  CardP new_card = copy_from ?  make_intrusive<Card>(set, copy_from) : make_intrusive<Card>(*game);
   // check for a stylesheet first, since other things depend on it
   ScriptValueP it = input->makeIterator();
   ScriptValueP key;
@@ -39,7 +41,7 @@ SCRIPT_FUNCTION(new_card) {
     if (key == script_nil || value == script_nil) continue;
     String key_name = key->toString();
     if (set_stylesheet_container(*game, new_card, value, key_name, ignore_field_not_found)) break;
-  }
+  }
   // set the rest of the key/value pairs
   it = input->makeIterator();
   while (ScriptValueP value = it->next(&key)) {
@@ -98,7 +100,7 @@ SCRIPT_FUNCTION(new_card) {
     else {
       set_container(container, value, key_name);
     }
-  }
+  }
   // if the game has a construction script, set the card context variable to be this card, run script
   if (game->import_script) {
     ScriptValueP ctx_card = ctx.getVariableOpt(SCRIPT_VAR_card);
@@ -134,7 +136,7 @@ SCRIPT_FUNCTION(new_card) {
     }
     // restore old context card
     if (ctx_card) ctx.setVariable(SCRIPT_VAR_card, ctx_card);
-  }
+  }
   SCRIPT_RETURN(new_card);
 }
 
diff --git a/src/script/functions/construction_helper.hpp b/src/script/functions/construction_helper.hpp
index 9df34f87..3b7d39b0 100644
--- a/src/script/functions/construction_helper.hpp
+++ b/src/script/functions/construction_helper.hpp
@@ -94,7 +94,10 @@ inline static bool set_stylesheet_container(const Game& game, CardP& card, Scrip
   if (key_name == _("style") || key_name == _("stylesheet") || key_name == _("template")) {
     if (!trim(value->toString()).empty()) {
       card->stylesheet = StyleSheet::byGameAndName(game, value->toString());
-      if (card->stylesheet) card->styling_data.init(card->stylesheet->styling_fields);
+      if (card->stylesheet) {
+        card->styling_data.init(card->stylesheet->styling_fields);
+        card->extraDataFor(*card->stylesheet).init(card->stylesheet->extra_card_fields);
+      }
     }
     return true;
   }
@@ -104,7 +107,14 @@ inline static bool set_stylesheet_container(const Game& game, CardP& card, Scrip
 inline static bool set_builtin_container(const Game& game, CardP& card, ScriptValueP& value, String key_name, bool ignore_field_not_found) {
   // check if the given value is for a built-in field, if found set it and return true
   key_name = unified_form(key_name);
-  if (key_name == _("card_notes") || key_name == _("notes") || key_name == _("note")) {
+  if (key_name == _("style") || key_name == _("stylesheet") || key_name == _("template")) {
+    return true; // we already took care of this
+  }
+  else if (key_name == _("style_version") || key_name == _("stylesheet_version") || key_name == _("template_version")) {
+    card->stylesheet_version = Version::fromString(value->toString());
+    return true;
+  }
+  else if (key_name == _("card_notes") || key_name == _("notes") || key_name == _("note")) {
     card->notes = value->toString();
     return true;
   }
@@ -237,7 +247,7 @@ inline static bool cards_from_table(SetP& set, vector<String>& headers, std::vec
     // is this a new card?
     if (contains(set->cards, card) || contains(cards_out, card)) {
       // make copy
-      card = make_intrusive<Card>(*card);
+      card = make_intrusive<Card>(set.get(), card);
     }
     cards_out.push_back(card);
   }
diff --git a/src/script/functions/json.cpp b/src/script/functions/json.cpp
index 45d4cd20..e215531e 100644
--- a/src/script/functions/json.cpp
+++ b/src/script/functions/json.cpp
@@ -256,6 +256,7 @@ CardP json_to_mse_card(boost::json::object& jv, Set* set) {
         StyleSheetP stylesheet = StyleSheet::byGameAndName(*set->game, String::FromUTF8(stylesheet_view.data(), stylesheet_view.size()));
         if (!stylesheet) continue;
         IndexMap<FieldP, ValueP>& stylesheet_data = card->extraDataFor(*stylesheet);
+        stylesheet_data.init(stylesheet->extra_card_fields);
         boost::json::object stylesheet_datav = it->value().as_object();
         for (auto stylesheet_it = stylesheet_datav.begin(); stylesheet_it != stylesheet_datav.end(); ++stylesheet_it) {
           boost::json::string_view key_view = stylesheet_it->key();
@@ -404,7 +405,7 @@ ScriptValueP json_to_mse(const String& string, Set* set) {
     options.allow_invalid_utf8 = true;
     wxScopedCharBuffer buffer = string.ToUTF8();
     boost::json::value jv = boost::json::parse(boost::json::string_view(buffer.data(), buffer.length()), ec, {}, options);
-    if(ec && buffer.length() > 0) queue_message(MESSAGE_ERROR, _ERROR_("json cant parse") + _("\n\n") + ec.message());
+    //if(ec && buffer.length() > 0) queue_message(MESSAGE_ERROR, _ERROR_("json cant parse") + _("\n\n") + ec.message());
     if(ec) return script_nil;
     return json_to_mse(jv, set);
   }
diff --git a/src/util/delayed_index_maps.hpp b/src/util/delayed_index_maps.hpp
index 236ed806..bdc30925 100644
--- a/src/util/delayed_index_maps.hpp
+++ b/src/util/delayed_index_maps.hpp
@@ -32,6 +32,21 @@ IndexMap<Key,Value>& DelayedIndexMaps<Key,Value>::get(const String& name, const
   return item->read_data;
 }
 
+/// Initialize this map with cloned values from another map
+template <typename Key, typename Value>
+void DelayedIndexMaps<Key,Value>::cloneFrom(const DelayedIndexMaps<Key,Value>& values) {
+  clear();
+  for (const auto& [name, src_ptr] : values.data) {
+    if (!src_ptr) continue;
+    auto dst_ptr = make_intrusive<DelayedIndexMapsData<Key,Value>>();
+    dst_ptr->unread_data = src_ptr->unread_data;
+    if (src_ptr->unread_data.empty()) {
+      dst_ptr->read_data.cloneFrom(src_ptr->read_data);
+    }
+    data[name] = dst_ptr;
+  }
+}
+
 template <typename Key, typename Value>
 void DelayedIndexMaps<Key,Value>::clear() {
   data.clear();
diff --git a/src/util/index_map.hpp b/src/util/index_map.hpp
index a08f1899..751e02fb 100644
--- a/src/util/index_map.hpp
+++ b/src/util/index_map.hpp
@@ -60,8 +60,8 @@ public:
     }
     return true;
   }
-  /// Initialize this map with cloned values from another list
-  void cloneFrom(const IndexMap<Key,Value>& values) {
+  /// Initialize this map with cloned values from another map
+  void cloneFrom(const IndexMap<Key,Value>& values) {
     if (this->size() == values.size()) return;
     this->reserve(values.size());
     for(size_t index = size() ; index < values.size() ; ++index) {
@@ -147,6 +147,8 @@ class DelayedIndexMaps {
 public:
   /// Get the data for a specific name. Initialize the map with init_with (if it is not alread initialized)
   IndexMap<Key,Value>& get(const String& name, const vector<Key>& init_with);
+  /// Initialize this map with cloned values from another map
+  void cloneFrom(const DelayedIndexMaps<Key,Value>& values);
   /// Clear the delayed index map
   void clear();
   map<String, intrusive_ptr<DelayedIndexMapsData<Key,Value>>> data;
diff --git a/src/util/io/reader.cpp b/src/util/io/reader.cpp
index 26dcd202..b3592a48 100644
--- a/src/util/io/reader.cpp
+++ b/src/util/io/reader.cpp
@@ -30,7 +30,7 @@ Reader::Reader(wxInputStream& input, Packaged* package, const String& filename,
   handleAppVersion();
 }
 
-void Reader::handleIgnore(int end_version, const Char* a) {
+void Reader::handleIgnore(Version end_version, const Char* a) {
   if (file_app_version < end_version) {
     if (enterBlock(a)) exitBlock();
   }
diff --git a/src/util/io/reader.hpp b/src/util/io/reader.hpp
index 0412f851..3763ce51 100644
--- a/src/util/io/reader.hpp
+++ b/src/util/io/reader.hpp
@@ -49,7 +49,7 @@ public:
   /// Is the thing currently being read 'complex', i.e. does it have children
   inline bool isCompound() const { return indent != expected_indent - 1 || value.empty(); }
   /// Ignore old keys
-  void handleIgnore(int, const Char*);
+  void handleIgnore(Version, const Char*);
   /// Get the version of the format we are reading
   inline Version formatVersion() const { return file_app_version; }
   
@@ -189,7 +189,7 @@ private:
       value = key == _("include_localized_file") ? addLocale(value) : key == _("include_dark_file") ? addDark(value) : value;
       auto [stream, include_package] = openFileFromPackage(package, value);
       Reader sub_reader(*stream, include_package, value, ignore_invalid);
-      if (sub_reader.file_app_version == 0) {
+      if (sub_reader.file_app_version.isZero()) {
         // in an included file, use the app version of the parent if there is none
         sub_reader.file_app_version = file_app_version;
       }
diff --git a/src/util/version.cpp b/src/util/version.cpp
index 222a7c74..10dde3ab 100644
--- a/src/util/version.cpp
+++ b/src/util/version.cpp
@@ -13,30 +13,31 @@
 
 // ----------------------------------------------------------------------------- : Version
 
-UInt Version::toNumber() const { return version; }
+UInt Version::toNumber() const { return major * 10000 + minor * 100 + revision; }
 
 String Version::toString() const {
-  if (version > 20000000) {
-    // major > 2000, the version is a date, use ISO notation
+  if (major >= 2000) {
+    // the version is a date, use ISO notation
     return String::Format(_("%04d-%02d-%02d"),
-          (version / 10000)      ,
-          (version / 100)   % 100,
-          (version / 1)     % 100);
+      major,
+      minor,
+      revision);
   } else {
     return String::Format(_("%d.%d.%d"),
-          (version / 10000)      ,
-          (version / 100)   % 100,
-          (version / 1)     % 100);
+      major,
+      minor,
+      revision);
   }
 }
 
 Version Version::fromString(const String& version) {
-  UInt major = 0, minor = 0, build = 0;
-  if (wxSscanf(version, _("%u.%u.%u"), &major, &minor, &build)<=1)  // a.b.c style
-      wxSscanf(version, _("%u-%u-%u"), &major, &minor, &build);  // date style
-  return Version(major * 10000 + minor * 100 + build);
+  UInt major = 0, minor = 0, revision = 0;
+  if (wxSscanf(version, _("%u.%u.%u"), &major, &minor, &revision)<=1)  // a.b.c style
+      wxSscanf(version, _("%u-%u-%u"), &major, &minor, &revision);  // date style
+  return Version(major, minor, revision);
 }
 
+bool Version::isZero() const { return revision == 0u && minor == 0u && major == 0u; }
 
 template <> void Reader::handle(Version& v) {
   v = Version::fromString(getValue());
@@ -51,7 +52,7 @@ template <> void GetDefaultMember::handle(const Version& v) {
 // ----------------------------------------------------------------------------- : Versions
 
 // NOTE: Don't use leading zeroes, they mean octal
-const Version app_version  = 10000 * MSE_VERSION_MAJOR + 100 * MSE_VERSION_MINOR + MSE_VERSION_PATCH;
+const Version app_version  = Version(MSE_VERSION_MAJOR, MSE_VERSION_MINOR, MSE_VERSION_PATCH);
 
 #if defined UNOFFICIAL_BUILD
 const Char* version_suffix = _(" (Unofficial)");
@@ -88,13 +89,13 @@ const Char* version_suffix = _(" (ascii build)");
  *     2.0.0 : bugfix release mostly, added error console
  *     2.0.2 : store game and stylesheet version numbers
  */
-const Version file_version_locale          = 20002; // 2.0.2
-const Version file_version_set             = 20002; // 2.0.2
-const Version file_version_game            =   308; // 0.3.8
-const Version file_version_stylesheet      =   308; // 0.3.8
-const Version file_version_symbol_font     =   306; // 0.3.6
-const Version file_version_export_template =   307; // 0.3.7
-const Version file_version_installer       =   307; // 0.3.7
-const Version file_version_symbol          =   305; // 0.3.5
-const Version file_version_clipboard       = 20002; // 2.0.2
-const Version file_version_script          =   307; // 0.3.7
+const Version file_version_locale          = Version(2u, 0u, 2u);
+const Version file_version_set             = Version(2u, 0u, 2u);
+const Version file_version_game            = Version(0u, 3u, 8u);
+const Version file_version_stylesheet      = Version(0u, 3u, 8u);
+const Version file_version_symbol_font     = Version(0u, 3u, 6u);
+const Version file_version_export_template = Version(0u, 3u, 7u);
+const Version file_version_installer       = Version(0u, 3u, 7u);
+const Version file_version_symbol          = Version(0u, 3u, 5u);
+const Version file_version_clipboard       = Version(2u, 6u, 0u);
+const Version file_version_script          = Version(0u, 3u, 7u);
diff --git a/src/util/version.hpp b/src/util/version.hpp
index f14ded87..5686dc8c 100644
--- a/src/util/version.hpp
+++ b/src/util/version.hpp
@@ -21,16 +21,34 @@
 /// A version number
 struct Version {
 public:
-  Version()             : version(0)       {}
-  Version(UInt version) : version(version) {}
-  
-  inline bool operator == (Version v) const { return version == v.version; }
-  inline bool operator != (Version v) const { return version != v.version; }
-  inline bool operator <  (Version v) const { return version <  v.version; }
-  inline bool operator <= (Version v) const { return version <= v.version; }
-  inline bool operator >  (Version v) const { return version >  v.version; }
-  inline bool operator >= (Version v) const { return version >= v.version; }
-  
+  Version()                                      : major(0u),    minor(0u),    revision(0u)       {}
+  Version(UInt major, UInt minor, UInt revision) : major(major), minor(minor), revision(revision) {}
+  
+  bool operator==(const Version& v) const {
+    return std::tie(major, minor, revision)
+      == std::tie(v.major, v.minor, v.revision);
+  }
+  bool operator!=(const Version& v) const {
+    return std::tie(major, minor, revision)
+      != std::tie(v.major, v.minor, v.revision);
+  }
+  bool operator<(const Version& v) const {
+    return std::tie(major, minor, revision)
+      < std::tie(v.major, v.minor, v.revision);
+  }
+  bool operator>(const Version& v) const {
+    return std::tie(major, minor, revision)
+      > std::tie(v.major, v.minor, v.revision);
+  }
+  bool operator<=(const Version& v) const {
+    return std::tie(major, minor, revision)
+      <= std::tie(v.major, v.minor, v.revision);
+  }
+  bool operator>=(const Version& v) const {
+    return std::tie(major, minor, revision)
+      >= std::tie(v.major, v.minor, v.revision);
+  }
+
   /// Convert a version number to a string
   String toString() const;
   /// Get the version number as an integer number
@@ -38,9 +56,14 @@ public:
   
   /// Convert a string to a version number
   static Version fromString(const String& version);
-  
-private:
-  UInt version; ///< Version number encoded as aabbcc, where a=major, b=minor, c=revision
+
+  /// Did this version get properly initialized?
+  bool   isZero() const;
+
+private:
+  UInt major = 0;
+  UInt minor = 0;
+  UInt revision = 0;
 };
 
 // ----------------------------------------------------------------------------- : Versions