feat(Core/SmartScripts): SMART_ACTION_SET_MOVEMENT_SPEED (#10018)

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

@@ -3330,6 +3330,29 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
                     }
                 }
 
+                delete targets;
+                break;
+            }
+        case SMART_ACTION_SET_MOVEMENT_SPEED:
+            {
+                uint32 speedInteger = e.action.movementSpeed.speedInteger;
+                uint32 speedFraction = e.action.movementSpeed.speedFraction;
+                float speed = float(speedInteger) + float(speedFraction) / std::pow(10, std::floor(std::log10(float(speedFraction ? speedFraction : 1)) + 1));
+
+                ObjectList* targets = GetTargets(e, unit);
+                if (!targets)
+                {
+                    break;
+                }
+
+                for (auto const& target : *targets)
+                {
+                    if (IsCreature(target))
+                    {
+                        me->SetSpeed(UnitMoveType(e.action.movementSpeed.movementType), speed);
+                    }
+                }
+
                 delete targets;
                 break;
             }

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

@@ -1182,6 +1182,21 @@ bool SmartAIMgr::IsEventValid(SmartScriptHolder& e)
                 }
                 break;
             }
+        case SMART_ACTION_SET_MOVEMENT_SPEED:
+            {
+                if (e.action.movementSpeed.movementType >= MAX_MOVE_TYPE)
+                {
+                    LOG_ERROR("sql.sql", "SmartAIMgr: Entry %u SourceType %u Event %u Action %u uses invalid movementType %u, skipped.", e.entryOrGuid, e.GetScriptType(), e.event_id, e.GetActionType(), e.action.movementSpeed.movementType);
+                    return false;
+                }
+
+                if (!e.action.movementSpeed.speedInteger && !e.action.movementSpeed.speedFraction)
+                {
+                    LOG_ERROR("sql.sql", "SmartAIMgr: Entry %u SourceType %u Event %u Action %u uses speed 0, skipped.", e.entryOrGuid, e.GetScriptType(), e.event_id, e.GetActionType());
+                    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

@@ -607,6 +607,7 @@ enum SMART_ACTION
     // SMART_ACTION_INVOKER_CAST                    = 134,    // TODO: solve name conflicts
 
     SMART_ACTION_TC_END                             = 135,    // placeholder
+    SMART_ACTION_SET_MOVEMENT_SPEED                 = 136,    // movementType, speedInteger, speedFraction
 
     SMART_ACTION_SET_HEALTH_PCT                     = 142,    // percent
 
@@ -1289,6 +1290,13 @@ struct SmartAction
             uint32 timer;
         } corpseDelay;
 
+        struct
+        {
+            uint32 movementType;
+            uint32 speedInteger;
+            uint32 speedFraction;
+        } movementSpeed;
+
         struct
         {
             uint32 percent;