Core/SAI: Add new action SMART_ACTION_SET_HEALTH_PCT (#25932)

* Core/SAI: Add new action SMART_ACTION_SET_HEALTH_PCT

Add new action SMART_ACTION_SET_HEALTH_PCT (142) with one single parameter "percent" to set the Unit health.
Close #25317

* Do not allow 0%

3 files changed, 34 insertions, 2 deletions

diff --git a/src/server/game/AI/SmartScripts/SmartScript.cpp b/src/server/game/AI/SmartScripts/SmartScript.cpp
index 261a73d4bd9..c1420c09968 100644
--- a/src/server/game/AI/SmartScripts/SmartScript.cpp
+++ b/src/server/game/AI/SmartScripts/SmartScript.cpp
@@ -1621,15 +1621,19 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
             break;
         }
         case SMART_ACTION_TRIGGER_TIMED_EVENT:
+        {
             ProcessEventsFor((SMART_EVENT)SMART_EVENT_TIMED_EVENT_TRIGGERED, nullptr, e.action.timeEvent.id);
 
             // remove this event if not repeatable
             if (e.event.event_flags & SMART_EVENT_FLAG_NOT_REPEATABLE)
                 mRemIDs.push_back(e.action.timeEvent.id);
             break;
+        }
         case SMART_ACTION_REMOVE_TIMED_EVENT:
+        {
             mRemIDs.push_back(e.action.timeEvent.id);
             break;
+        }
         case SMART_ACTION_OVERRIDE_SCRIPT_BASE_OBJECT:
         {
             for (WorldObject* target : targets)
@@ -1658,12 +1662,16 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
             break;
         }
         case SMART_ACTION_RESET_SCRIPT_BASE_OBJECT:
+        {
             ResetBaseObject();
             break;
+        }
         case SMART_ACTION_CALL_SCRIPT_RESET:
+        {
             SetPhase(0);
             OnReset();
             break;
+        }
         case SMART_ACTION_SET_RANGED_MOVEMENT:
         {
             if (!IsSmart())
@@ -2303,7 +2311,6 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
             ProcessEventsFor((SMART_EVENT)SMART_EVENT_TIMED_EVENT_TRIGGERED, nullptr, eventId);
             break;
         }
-
         case SMART_ACTION_REMOVE_ALL_GAMEOBJECTS:
         {
             for (WorldObject* const target : targets)
@@ -2376,10 +2383,19 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
             break;
         }
         case SMART_ACTION_SET_HOVER:
+        {
             for (WorldObject* target : targets)
                 if (IsUnit(target))
                     target->ToUnit()->SetHover(e.action.setHover.enable != 0);
             break;
+        }
+        case SMART_ACTION_SET_HEALTH_PCT:
+        {
+            for (WorldObject* target : targets)
+                if (Unit* targetUnit = target->ToUnit())
+                    targetUnit->SetHealth(targetUnit->CountPctFromMaxHealth(e.action.setHealthPct.percent));
+            break;
+        }
         default:
             TC_LOG_ERROR("sql.sql", "SmartScript::ProcessAction: Entry %d SourceType %u, Event %u, Unhandled Action type %u", e.entryOrGuid, e.GetScriptType(), e.event_id, e.GetActionType());
             break;
diff --git a/src/server/game/AI/SmartScripts/SmartScriptMgr.cpp b/src/server/game/AI/SmartScripts/SmartScriptMgr.cpp
index 05e84332717..e50f8014ee1 100644
--- a/src/server/game/AI/SmartScripts/SmartScriptMgr.cpp
+++ b/src/server/game/AI/SmartScripts/SmartScriptMgr.cpp
@@ -1589,6 +1589,16 @@ bool SmartAIMgr::IsEventValid(SmartScriptHolder& e)
 
             break;
         }
+        case SMART_ACTION_SET_HEALTH_PCT:
+        {
+            if (e.action.setHealthPct.percent > 100 || !e.action.setHealthPct.percent)
+            {
+                TC_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_FOLLOW:
         case SMART_ACTION_SET_ORIENTATION:
         case SMART_ACTION_STORE_TARGET_LIST:
diff --git a/src/server/game/AI/SmartScripts/SmartScriptMgr.h b/src/server/game/AI/SmartScripts/SmartScriptMgr.h
index f2c387de5f2..c12e20db8b6 100644
--- a/src/server/game/AI/SmartScripts/SmartScriptMgr.h
+++ b/src/server/game/AI/SmartScripts/SmartScriptMgr.h
@@ -598,8 +598,9 @@ enum SMART_ACTION
     SMART_ACTION_OVERRIDE_WEATHER                   = 139,    // zoneId, weatherId, intensity
     SMART_ACTION_SET_AI_ANIM_KIT                    = 140,    // don't use on 3.3.5a
     SMART_ACTION_SET_HOVER                          = 141,    // 0/1
+    SMART_ACTION_SET_HEALTH_PCT                     = 142,    // percent
 
-    SMART_ACTION_END                                = 142
+    SMART_ACTION_END                                = 143
 };
 
 struct SmartAction
@@ -1190,6 +1191,11 @@ struct SmartAction
             uint32 toRespawnPosition;
         } evade;
 
+        struct
+        {
+            uint32 percent;
+        } setHealthPct;
+
         //! Note for any new future actions
         //! All parameters must have type uint32