feat(Core/SmartScripts): SMART_ACTION_SET_HEALTH_PCT

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

@@ -3311,6 +3311,25 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
                     }
                 }
 
+                delete targets;
+                break;
+            }
+        case SMART_ACTION_SET_HEALTH_PCT:
+            {
+                ObjectList* targets = GetTargets(e, unit);
+                if (!targets)
+                {
+                    break;
+                }
+
+                for (auto const& target : *targets)
+                {
+                    if (Unit* targetUnit = target->ToUnit())
+                    {
+                        targetUnit->SetHealth(targetUnit->CountPctFromMaxHealth(e.action.setHealthPct.percent));
+                    }
+                }
+
                 delete targets;
                 break;
             }

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

@@ -1172,6 +1172,16 @@ bool SmartAIMgr::IsEventValid(SmartScriptHolder& e)
                 }
                 break;
             }
+        case SMART_ACTION_SET_HEALTH_PCT:
+            {
+                if (e.action.setHealthPct.percent > 100 || !e.action.setHealthPct.percent)
+                {
+                    LOG_ERROR("sql.sql", "SmartAIMgr: Entry %d SourceType %u Event %u Action %u is trying to set invalid HP percent %u, skipped.",
+                                 e.entryOrGuid, e.GetScriptType(), e.event_id, e.GetActionType(), e.action.setHealthPct.percent);
+                    return false;
+                }
+                break;
+            }
         case SMART_ACTION_START_CLOSEST_WAYPOINT:
         case SMART_ACTION_FOLLOW:
         case SMART_ACTION_SET_ORIENTATION:

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

@@ -608,6 +608,8 @@ enum SMART_ACTION
 
     SMART_ACTION_TC_END                             = 135,    // placeholder
 
+    SMART_ACTION_SET_HEALTH_PCT                     = 142,    // percent
+
     // AC-only SmartActions:
 
     SMART_ACTION_AC_START                           = 200,    // placeholder
@@ -1286,6 +1288,11 @@ struct SmartAction
         {
             uint32 timer;
         } corpseDelay;
+
+        struct
+        {
+            uint32 percent;
+        } setHealthPct;
         //! Note for any new future actions
         //! All parameters must have type uint32