From e394cd298bd051102deec4ee6dae37c0de213fd2 Mon Sep 17 00:00:00 2001
From: treeston <treeston.mmoc@gmail.com>
Date: Wed, 24 Feb 2016 19:35:19 +0100
Subject: Core/PlayerAI: Some more helper methods added. Also, charmed players
 no longer break crowd control.

(cherry picked from commit a8f760b69213514f16f24f7af85449c5929f2032)
---
 src/server/game/AI/PlayerAI/PlayerAI.cpp | 25 ++++++++++++++++++++-----
 src/server/game/AI/PlayerAI/PlayerAI.h   |  2 ++
 2 files changed, 22 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/server/game/AI/PlayerAI/PlayerAI.cpp b/src/server/game/AI/PlayerAI/PlayerAI.cpp
index 5f15994b32c..38db081e5e5 100644
--- a/src/server/game/AI/PlayerAI/PlayerAI.cpp
+++ b/src/server/game/AI/PlayerAI/PlayerAI.cpp
@@ -150,9 +150,23 @@ void PlayerAI::DoAutoAttackIfReady()
         DoMeleeAttackIfReady();
 }
 
+struct UncontrolledTargetSelectPredicate : public std::unary_function<Unit*, bool>
+{
+    bool operator()(Unit const* target) const
+    {
+        return !target->HasBreakableByDamageCrowdControlAura();
+    }
+};
+Unit* SimpleCharmedPlayerAI::SelectAttackTarget() const
+{
+    if (Unit* charmer = me->GetCharmer())
+        return charmer->IsAIEnabled ? charmer->GetAI()->SelectTarget(SELECT_TARGET_RANDOM, 0, UncontrolledTargetSelectPredicate()) : charmer->GetVictim();
+    return nullptr;
+}
+
 void SimpleCharmedPlayerAI::UpdateAI(const uint32 /*diff*/)
 {
-    Creature* charmer = me->GetCharmer()->ToCreature();
+    Creature* charmer = me->GetCharmer() ? me->GetCharmer()->ToCreature() : nullptr;
 
     //kill self if charm aura has infinite duration
     if (charmer->IsInEvadeMode())
@@ -169,9 +183,9 @@ void SimpleCharmedPlayerAI::UpdateAI(const uint32 /*diff*/)
     if (charmer->IsInCombat())
     {
         Unit* target = me->GetVictim();
-        if (!target || !charmer->IsValidAttackTarget(target))
+        if (!target || !charmer->IsValidAttackTarget(target) || target->HasBreakableByDamageCrowdControlAura())
         {
-            target = charmer->SelectNearestTarget();
+            target = SelectAttackTarget();
             if (!target)
                 return;
 
@@ -180,15 +194,16 @@ void SimpleCharmedPlayerAI::UpdateAI(const uint32 /*diff*/)
             else
                 AttackStart(target);
         }
+        DoAutoAttackIfReady();
     }
     else
     {
         me->AttackStop();
         me->CastStop();
+        me->StopMoving();
+        me->GetMotionMaster()->Clear();
         me->GetMotionMaster()->MoveFollow(charmer, PET_FOLLOW_DIST, PET_FOLLOW_ANGLE);
     }
-
-    DoAutoAttackIfReady();
 }
 
 void SimpleCharmedPlayerAI::OnCharmed(bool apply)
diff --git a/src/server/game/AI/PlayerAI/PlayerAI.h b/src/server/game/AI/PlayerAI/PlayerAI.h
index 226789cc277..467c1dfd51a 100644
--- a/src/server/game/AI/PlayerAI/PlayerAI.h
+++ b/src/server/game/AI/PlayerAI/PlayerAI.h
@@ -39,6 +39,7 @@ class TC_GAME_API PlayerAI : public UnitAI
         Player* const me;
         void SetIsRangedAttacker(bool state) { _isSelfRangedAttacker = state; } // this allows overriding of the default ranged attacker detection
 
+        virtual Unit* SelectAttackTarget() const { return me->GetCharmer() ? me->GetCharmer()->GetVictim() : nullptr; }
         void DoRangedAttackIfReady();
         void DoAutoAttackIfReady();
 
@@ -53,6 +54,7 @@ class TC_GAME_API SimpleCharmedPlayerAI : public PlayerAI
         SimpleCharmedPlayerAI(Player* player) : PlayerAI(player) { }
         void UpdateAI(uint32 diff) override;
         void OnCharmed(bool apply) override;
+        Unit* SelectAttackTarget() const;
 };
 
 #endif
-- 
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