First part of implementation of some type-specific handlers.

TODO:
- merge dwellings.json into object configs
- proper implementation of overrides for towns
- fully connect new API to RMG/H3M

lib/mapObjects/CommonConstructors.h

@@ -0,0 +1,104 @@
+#pragma once
+
+#include "CObjectClassesHandler.h"
+#include "../CTownHandler.h" // for building ID-based filters
+
+/*
+ * CommonConstructors.h, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+
+class CGTownInstance;
+class CGHeroInstance;
+class CGDwelling;
+//class CGArtifact;
+//class CGCreature;
+class CHeroClass;
+
+/// Class that is used for objects that do not have dedicated handler
+template<class ObjectType>
+class CDefaultObjectTypeHandler : public AObjectTypeHandler
+{
+protected:
+	ObjectType * createTyped(ObjectTemplate tmpl) const
+	{
+		auto obj = new ObjectType();
+		obj->ID = tmpl.id;
+		obj->subID = tmpl.subid;
+		obj->appearance = tmpl;
+		return obj;
+	}
+public:
+	CDefaultObjectTypeHandler(){}
+
+	CGObjectInstance * create(ObjectTemplate tmpl) const
+	{
+		return createTyped(tmpl);
+	}
+
+	virtual void configureObject(CGObjectInstance * object, CRandomGenerator & rng) const
+	{
+	}
+
+	virtual const IObjectInfo * getObjectInfo(ObjectTemplate tmpl) const
+	{
+		return nullptr;
+	}
+};
+
+class CObstacleConstructor : public CDefaultObjectTypeHandler<CGObjectInstance>
+{
+public:
+	CObstacleConstructor();
+	bool isStaticObject();
+};
+
+class CTownInstanceConstructor : public CDefaultObjectTypeHandler<CGTownInstance>
+{
+	JsonNode filtersJson;
+protected:
+	bool objectFilter(const CGObjectInstance *, const ObjectTemplate &) const;
+
+public:
+	CFaction * faction;
+	std::map<std::string, LogicalExpression<BuildingID>> filters;
+
+	CTownInstanceConstructor();
+	CGObjectInstance * create(ObjectTemplate tmpl) const;
+	void initTypeData(const JsonNode & input);
+	void configureObject(CGObjectInstance * object, CRandomGenerator & rng) const;
+	void afterLoadFinalization();
+};
+
+class CHeroInstanceConstructor : public CDefaultObjectTypeHandler<CGHeroInstance>
+{
+protected:
+	bool objectFilter(const CGObjectInstance *, const ObjectTemplate &) const;
+
+public:
+	CHeroClass * heroClass;
+
+	CHeroInstanceConstructor();
+	CGObjectInstance * create(ObjectTemplate tmpl) const;
+	void initTypeData(const JsonNode & input);
+	void configureObject(CGObjectInstance * object, CRandomGenerator & rng) const;
+};
+
+class CDwellingInstanceConstructor : public CDefaultObjectTypeHandler<CGDwelling>
+{
+protected:
+	bool objectFilter(const CGObjectInstance *, const ObjectTemplate &) const;
+
+public:
+	std::vector<std::vector<CCreature *>> availableCreatures;
+
+	CDwellingInstanceConstructor();
+	CGObjectInstance * create(ObjectTemplate tmpl) const;
+	void initTypeData(const JsonNode & input);
+	void configureObject(CGObjectInstance * object, CRandomGenerator & rng) const;
+};