fix(Core/SmartScripts): Added new parameter onlyInCombat to `SMART_… (#13947)

* fix(Core/SmartScripts): Added new parameter `onlyInCombat` to `SMART_EVENT_FRIENDLY_MISSING_BUFF` event.

Coilfang Scale-Healer should cast Power Word: Shield only in combat.
Fixes #13838

* missing sql.

data/sql/updates/pending_db_world/rev_1669456032833719200.sql

@@ -0,0 +1,2 @@
+--
+UPDATE `smart_scripts` SET `event_param5`=1 WHERE `entryorguid`=21126 AND `source_type`=0 AND `id` IN (5,6);

src/server/game/AI/SmartScripts/SmartScript.cpp

@@ -3511,16 +3511,21 @@ void SmartScript::ProcessEvent(SmartScriptHolder& e, Unit* unit, uint32 var0, ui
                 break;
             }
         case SMART_EVENT_FRIENDLY_MISSING_BUFF:
+        {
+            if (e.event.missingBuff.onlyInCombat && !me->IsEngaged())
             {
-                std::vector<Creature*> creatures;
+                return;
-                DoFindFriendlyMissingBuff(creatures, float(e.event.missingBuff.radius), e.event.missingBuff.spell);
-
-                if (creatures.empty())
-                    return;
-
-                ProcessTimedAction(e, e.event.missingBuff.repeatMin, e.event.missingBuff.repeatMax, Acore::Containers::SelectRandomContainerElement(creatures));
-                break;
             }
+
+            std::vector<Creature*> creatures;
+            DoFindFriendlyMissingBuff(creatures, float(e.event.missingBuff.radius), e.event.missingBuff.spell);
+
+            if (creatures.empty())
+                return;
+
+            ProcessTimedAction(e, e.event.missingBuff.repeatMin, e.event.missingBuff.repeatMax, Acore::Containers::SelectRandomContainerElement(creatures));
+            break;
+        }
         case SMART_EVENT_HAS_AURA:
             {
                 if (!me)

src/server/game/AI/SmartScripts/SmartScriptMgr.h

@@ -131,7 +131,7 @@ enum SMART_EVENT
     SMART_EVENT_VICTIM_CASTING           = 13,      // RepeatMin, RepeatMax, spellid
     SMART_EVENT_FRIENDLY_HEALTH          = 14,      // HPDeficit, Radius, RepeatMin, RepeatMax
     SMART_EVENT_FRIENDLY_IS_CC           = 15,      // Radius, RepeatMin, RepeatMax
-    SMART_EVENT_FRIENDLY_MISSING_BUFF    = 16,      // SpellId, Radius, RepeatMin, RepeatMax
+    SMART_EVENT_FRIENDLY_MISSING_BUFF    = 16,      // SpellId, Radius, RepeatMin, RepeatMax, onlyInCombat
     SMART_EVENT_SUMMONED_UNIT            = 17,      // CreatureId(0 all), CooldownMin, CooldownMax
     SMART_EVENT_TARGET_MANA_PCT          = 18,      // ManaMin%, ManaMax%, RepeatMin, RepeatMax
     SMART_EVENT_ACCEPTED_QUEST           = 19,      // QuestID (0 = any), CooldownMin, CooldownMax
@@ -301,6 +301,7 @@ struct SmartEvent
             uint32 radius;
             uint32 repeatMin;
             uint32 repeatMax;
+            uint32 onlyInCombat;
         } missingBuff;
 
         struct