Big update.

src/strategy/actions/ReachTargetActions.cpp

@@ -0,0 +1,64 @@
+/*
+ * 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 "ReachTargetActions.h"
+#include "Event.h"
+#include "Playerbots.h"
+#include "ServerFacade.h"
+
+bool ReachTargetAction::Execute(Event event)
+{
+    Unit* target = AI_VALUE(Unit*, GetTargetName());
+    if (!target)
+        return false;
+
+    UpdateMovementState();
+
+    float combatReach = bot->GetCombatReach() + target->GetCombatReach() + 4.0f / 3.0f;
+    if (distance < std::max(5.0f, combatReach))
+    {
+        return ChaseTo(target, 0.0f, GetFollowAngle());
+    }
+    else
+    {
+        combatReach = bot->GetCombatReach() + target->GetCombatReach();
+        bool inLos = bot->IsWithinLOSInMap(target);
+        bool  isFriend  = bot->IsFriendlyTo(target);
+        float chaseDist = inLos ? distance : isFriend ? distance / 2 : distance;
+        return ChaseTo(target, chaseDist + combatReach, bot->GetAngle(target));
+    }
+}
+
+bool ReachTargetAction::isUseful()
+{
+    // do not move while casting
+    if (bot->IsNonMeleeSpellCast(true))
+        return false;
+
+    Unit* target = AI_VALUE(Unit*, GetTargetName());
+    return target && (!bot->IsWithinDistInMap(target, distance) || (bot->IsWithinDistInMap(target, distance) && !bot->IsWithinLOSInMap(target)));
+}
+
+std::string const ReachTargetAction::GetTargetName()
+{
+    return "current target";
+}
+
+bool CastReachTargetSpellAction::isUseful()
+{
+    return sServerFacade->IsDistanceGreaterThan(AI_VALUE2(float, "distance", "current target"), (distance + sPlayerbotAIConfig->contactDistance));
+}
+
+ReachSpellAction::ReachSpellAction(PlayerbotAI* botAI) : ReachTargetAction(botAI, "reach spell", botAI->GetRange("spell"))
+{
+}
+
+ReachPartyMemberToHealAction::ReachPartyMemberToHealAction(PlayerbotAI* botAI) : ReachTargetAction(botAI, "reach party member to heal", botAI->GetRange("heal"))
+{
+}
+
+std::string const ReachPartyMemberToHealAction::GetTargetName()
+{
+    return "party member to heal";
+}