Big update.

src/strategy/values/ThreatValues.cpp

@@ -0,0 +1,80 @@
+/*
+ * 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 "ThreatValues.h"
+#include "ThreatMgr.h"
+#include "Playerbots.h"
+
+uint8 ThreatValue::Calculate()
+{
+    if (qualifier == "aoe")
+    {
+        uint8 maxThreat = 0;
+        GuidVector attackers = context->GetValue<GuidVector >("attackers")->Get();
+        for (ObjectGuid const guid : attackers)
+        {
+            Unit* unit = botAI->GetUnit(guid);
+            if (!unit || !unit->IsAlive())
+                continue;
+
+            uint8 threat = Calculate(unit);
+            if (!maxThreat || threat > maxThreat)
+                maxThreat = threat;
+        }
+
+        return maxThreat;
+    }
+
+    Unit* target = AI_VALUE(Unit*, qualifier);
+    return Calculate(target);
+}
+
+uint8 ThreatValue::Calculate(Unit* target)
+{
+    if (!target)
+        return 0;
+
+    if (target->GetGUID().IsPlayer())
+        return 0;
+
+    Group* group = bot->GetGroup();
+    if (!group)
+        return 0;
+
+    float botThreat = target->getThreatMgr().getThreat(bot);
+    float maxThreat = -1.0f;
+    bool hasTank = false;
+
+    for (GroupReference* gref = group->GetFirstMember(); gref; gref = gref->next())
+    {
+        Player* player = gref->GetSource();
+        if (!player || !player->IsAlive() || player == bot)
+            continue;
+
+        if (botAI->IsTank(player))
+        {
+            hasTank = true;
+            float threat = target->getThreatMgr().getThreat(player);
+            if (maxThreat < threat)
+                maxThreat = threat;
+        }
+    }
+
+    if (maxThreat <= 0 && !hasTank)
+        return 0;
+
+    // calculate normal threat for fleeing targets
+    bool fleeing = target->GetMotionMaster()->GetCurrentMovementGeneratorType() == FLEEING_MOTION_TYPE ||
+        target->GetMotionMaster()->GetCurrentMovementGeneratorType() == TIMED_FLEEING_MOTION_TYPE;
+
+    // return high threat if tank has no threat
+    if (target->IsInCombat() && maxThreat <= 0 && botThreat <= 0 && hasTank && !fleeing)
+        return 100;
+
+    // return low threat if mob if fleeing
+    if (hasTank && fleeing)
+        return 0;
+
+    return botThreat * 100 / maxThreat;
+}