Big update.

src/strategy/values/TankTargetValue.cpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
+ */
+
+#include "AttackersValue.h"
+#include "TankTargetValue.h"
+#include "Playerbots.h"
+
+class FindTargetForTankStrategy : public FindNonCcTargetStrategy
+{
+    public:
+        FindTargetForTankStrategy(PlayerbotAI* botAI) : FindNonCcTargetStrategy(botAI), minThreat(0) { }
+
+        void CheckAttacker(Unit* creature, ThreatMgr* threatMgr) override
+        {
+            Player* bot = botAI->GetBot();
+            if (IsCcTarget(creature))
+                return;
+
+            float threat = threatMgr->getThreat(bot);
+            if (!result || (minThreat - threat) > 0.1f)
+            {
+                minThreat = threat;
+                result = creature;
+            }
+        }
+
+    protected:
+        float minThreat;
+};
+
+Unit* TankTargetValue::Calculate()
+{
+    FindTargetForTankStrategy strategy(botAI);
+    return FindTarget(&strategy);
+}