Core/SAI: Implement new action to set movement speed

Port From (https://github.com/TrinityCore/TrinityCore/commit/5dd6d31c01dcc48f3d286196808ca0f6de9eaf04)

Source/Framework/Constants/SmartAIConst.cs

@@ -360,8 +360,9 @@ namespace Framework.Constants
         PlayAnimkit = 128,
         ScenePlay = 129,    // sceneId
         SceneCancel = 130,    // sceneId
-        // 131 - 135 : 3.3.5 reserved
+        // 131 - 134 : 3.3.5 reserved
         PlayCinematic = 135,    // reserved for future uses
+        SetMovementSpeed = 136,    // movementType, speedInteger, speedFraction
         End = 131
     }
 

Source/Game/AI/SmartScripts/SmartAIManager.cs

@@ -1245,6 +1245,22 @@ namespace Game.AI
                             Log.outError(LogFilter.Sql, $"Entry {e.entryOrGuid} SourceType {e.GetScriptType()} Event {e.event_id} Action {e.GetActionType()} uses invalid data type {e.Action.auraType.type} (value range 0-TOTAL_AURAS), skipped.");
                             return false;
                         }
+                        break;
+                    }
+                case SmartActions.SetMovementSpeed:
+                    {
+                        if (e.Action.movementSpeed.movementType >= (int)MovementGeneratorType.Max)
+                        {
+                            Log.outError(LogFilter.Sql, $"SmartAIMgr: Entry {e.entryOrGuid} SourceType {e.GetScriptType()} Event {e.event_id} Action {e.GetActionType()} uses invalid movementType {e.Action.movementSpeed.movementType}, skipped.");
+                            return false;
+                        }
+
+                        if (e.Action.movementSpeed.speedInteger == 0 && e.Action.movementSpeed.speedFraction == 0)
+                        {
+                            Log.outError(LogFilter.Sql, $"SmartAIMgr: Entry {e.entryOrGuid} SourceType {e.GetScriptType()} Event {e.event_id} Action {e.GetActionType()} uses speed 0, skipped.");
+                            return false;
+                        }
+
                         break;
                     }
                 case SmartActions.StartClosestWaypoint:
@@ -2325,6 +2341,9 @@ namespace Game.AI
         [FieldOffset(4)]
         public Scene scene;
 
+        [FieldOffset(4)]
+        public MovementSpeed movementSpeed;
+
         [FieldOffset(4)]
         public Raw raw;
 
@@ -2816,6 +2835,12 @@ namespace Game.AI
         {
             public uint sceneId;
         }
+        public struct MovementSpeed
+        {
+            public uint movementType;
+            public uint speedInteger;
+            public uint speedFraction;
+        }
         public struct Raw
         {
             public uint param1;

Source/Game/AI/SmartScripts/SmartScript.cs

@@ -2622,6 +2622,22 @@ namespace Game.AI
                                 playerTarget.GetSceneMgr().CancelSceneBySceneId(e.Action.scene.sceneId);
                         }
 
+                        break;
+                    }
+                case SmartActions.SetMovementSpeed:
+                    {
+                        var targets = GetTargets(e, unit);
+                        if (targets.Empty())
+                            break;
+
+                        uint speedInteger = e.Action.movementSpeed.speedInteger;
+                        uint speedFraction = e.Action.movementSpeed.speedFraction;
+                        float speed = (float)((float)speedInteger + (float)speedFraction / Math.Pow(10, Math.Floor(Math.Log10((float)(speedFraction != 0 ? speedFraction : 1)) + 1)));
+
+                        foreach (WorldObject target in targets)
+                            if (IsCreature(target))
+                                me.SetSpeed((UnitMoveType)e.Action.movementSpeed.movementType, speed);
+
                         break;
                     }
                 default: