Big update.

src/strategy/values/AttackersValue.h

@@ -0,0 +1,39 @@
+/*
+ * 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.
+ */
+
+#ifndef _PLAYERBOT_ATTACKERSVALUE_H
+#define _PLAYERBOT_ATTACKERSVALUE_H
+
+#include "PlayerbotAIConfig.h"
+#include "Value.h"
+
+class Group;
+class Player;
+class PlayerbotAI;
+class Unit;
+
+class AttackersValue : public ObjectGuidListCalculatedValue
+{
+	public:
+        AttackersValue(PlayerbotAI* botAI) : ObjectGuidListCalculatedValue(botAI, "attackers", 2) { }
+
+        GuidVector Calculate();
+        static bool IsPossibleTarget(Unit* attacker, Player* bot, float range = sPlayerbotAIConfig->sightDistance);
+        static bool IsValidTarget(Unit* attacker, Player* bot);
+
+	private:
+        void AddAttackersOf(Group* group, std::set<Unit*>& targets);
+        void AddAttackersOf(Player* player, std::set<Unit*>& targets);
+		void RemoveNonThreating(std::set<Unit*>& targets);
+};
+
+class PossibleAddsValue : public BoolCalculatedValue
+{
+    public:
+        PossibleAddsValue(PlayerbotAI* botAI, std::string const name = "possible adds") : BoolCalculatedValue(botAI, name) { }
+
+        bool Calculate() override;
+};
+
+#endif