[world] added booster feature, is automatically enabled when a booster is created, for future booster setting for block

server/src/hardware/booster/list/boosterlist.cpp

@@ -2,7 +2,7 @@
  * This file is part of Traintastic,
  * see <https://github.com/traintastic/traintastic>.
  *
- * Copyright (C) 2025 Reinder Feenstra
+ * Copyright (C) 2025-2026 Reinder Feenstra
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -69,3 +69,19 @@ bool BoosterList::isListedProperty(std::string_view name)
 {
   return BoosterListTableModel::isListedProperty(name);
 }
+
+void BoosterList::objectAdded(const std::shared_ptr<Booster>& /*object*/)
+{
+  if(m_items.size() == 1)
+  {
+    getWorld(parent()).enableFeature(WorldFeature::Boosters);
+  }
+}
+
+void BoosterList::objectRemoved(const std::shared_ptr<Booster>& /*object*/)
+{
+  if(m_items.empty())
+  {
+    getWorld(parent()).disableFeature(WorldFeature::Boosters);
+  }
+}

server/src/hardware/booster/list/boosterlist.hpp

@@ -2,7 +2,7 @@
  * This file is part of Traintastic,
  * see <https://github.com/traintastic/traintastic>.
  *
- * Copyright (C) 2025 Reinder Feenstra
+ * Copyright (C) 2025-2026 Reinder Feenstra
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -30,10 +30,6 @@ class BoosterList final : public ObjectList<Booster>
 {
   CLASS_ID("list.booster")
 
-protected:
-  void worldEvent(WorldState state, WorldEvent event) final;
-  bool isListedProperty(std::string_view name) final;
-
 public:
   Method<std::shared_ptr<Booster>()> create;
   Method<void(const std::shared_ptr<Booster>&)> delete_;
@@ -42,6 +38,13 @@ public:
   ~BoosterList() final = default;
 
   TableModelPtr getModel() final;
+
+protected:
+  void worldEvent(WorldState state, WorldEvent event) final;
+  bool isListedProperty(std::string_view name) final;
+
+  void objectAdded(const std::shared_ptr<Booster>& object) final;
+  void objectRemoved(const std::shared_ptr<Booster>& object) final;
 };
 
 #endif

server/src/world/world.hpp

@@ -188,6 +188,18 @@ class World : public Object
       return m_features;
     }
 
+    void enableFeature(WorldFeature feature)
+    {
+      assert(isAutomaticFeature(feature));
+      setFeature(feature, true);
+    }
+
+    void disableFeature(WorldFeature feature)
+    {
+      assert(isAutomaticFeature(feature));
+      setFeature(feature, false);
+    }
+
     std::string getObjectId() const final { return std::string(classId); }
 
     std::string getUniqueId(std::string_view prefix) const;

server/src/world/worldfeatures.hpp

@@ -28,6 +28,7 @@
 enum class WorldFeature
 {
   Scripting = 0,
+  Boosters = 1,
 };
 
 class WorldFeatures
@@ -81,4 +82,19 @@ private:
   }
 };
 
+constexpr bool isAutomaticFeature(WorldFeature feature)
+{
+  switch(feature)
+  {
+    // features controlled by world properties:
+    case WorldFeature::Scripting:
+      return false;
+
+    // features controlled by other objects:
+    case WorldFeature::Boosters:
+      return true;
+  }
+  return false;
+}
+
 #endif