cloned Nullkiller into Nullkiller2

AI/Nullkiller2/Behaviors/StayAtTownBehavior.cpp

@@ -0,0 +1,66 @@
+/*
+* StartupBehavior.cpp, 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
+*
+*/
+#include "StdInc.h"
+#include "StayAtTownBehavior.h"
+#include "../AIGateway.h"
+#include "../AIUtility.h"
+#include "../Goals/StayAtTown.h"
+#include "../Goals/Composition.h"
+#include "../Goals/ExecuteHeroChain.h"
+#include "lib/mapObjects/MapObjects.h" //for victory conditions
+#include "../Engine/Nullkiller2.h"
+
+namespace NKAI
+{
+
+using namespace Goals;
+
+std::string StayAtTownBehavior::toString() const
+{
+	return "StayAtTownBehavior";
+}
+
+Goals::TGoalVec StayAtTownBehavior::decompose(const Nullkiller2 * ai) const
+{
+	Goals::TGoalVec tasks;
+	auto towns = ai->cb->getTownsInfo();
+
+	if(!towns.size())
+		return tasks;
+
+	std::vector<AIPath> paths;
+
+	for(auto town : towns)
+	{
+		ai->pathfinder->calculatePathInfo(paths, town->visitablePos());
+
+		for(auto & path : paths)
+		{
+			if(town->getVisitingHero() && town->getVisitingHero() != path.targetHero)
+				continue;
+
+			if(!path.getFirstBlockedAction() && path.exchangeCount <= 1)
+			{
+				Composition stayAtTown;
+
+				stayAtTown.addNextSequence({
+						sptr(ExecuteHeroChain(path)),
+						sptr(StayAtTown(town, path))
+					});
+
+				tasks.push_back(sptr(stayAtTown));
+			}
+		}
+	}
+
+	return tasks;
+}
+
+}