Core/SAI: Implement new action to set movement speed

(cherry picked from commit 5dd6d31c01dcc48f3d286196808ca0f6de9eaf04)

# Conflicts:
#	src/server/game/AI/SmartScripts/SmartScriptMgr.cpp
#	src/server/game/AI/SmartScripts/SmartScriptMgr.h

3 files changed, 36 insertions, 1 deletions

diff --git a/src/server/game/AI/SmartScripts/SmartScript.cpp b/src/server/game/AI/SmartScripts/SmartScript.cpp
index a2cc849865f..751abd33c09 100644
--- a/src/server/game/AI/SmartScripts/SmartScript.cpp
+++ b/src/server/game/AI/SmartScripts/SmartScript.cpp
@@ -2304,6 +2304,18 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
             }
             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));
+
+            for (WorldObject* target : targets)
+                if (IsCreature(target))
+                    me->SetSpeed(UnitMoveType(e.action.movementSpeed.movementType), speed);
+
+            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 7735991ca45..119dce548cf 100644
--- a/src/server/game/AI/SmartScripts/SmartScriptMgr.cpp
+++ b/src/server/game/AI/SmartScripts/SmartScriptMgr.cpp
@@ -1503,6 +1503,22 @@ bool SmartAIMgr::IsEventValid(SmartScriptHolder& e)
                 TC_LOG_ERROR("sql.sql", "Entry %u SourceType %u Event %u Action %u does not specify duration", e.entryOrGuid, e.GetScriptType(), e.event_id, e.GetActionType());
                 return false;
             }
+        case SMART_ACTION_SET_MOVEMENT_SPEED:
+        {
+            if (e.action.movementSpeed.movementType >= MAX_MOVE_TYPE)
+            {
+                TC_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)
+            {
+                TC_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_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 c2ab701cb51..a9f819750b7 100644
--- a/src/server/game/AI/SmartScripts/SmartScriptMgr.h
+++ b/src/server/game/AI/SmartScripts/SmartScriptMgr.h
@@ -585,7 +585,7 @@ enum SMART_ACTION
     SMART_ACTION_RESPAWN_BY_SPAWNID                 = 133,    // spawnType, spawnId
     SMART_ACTION_INVOKER_CAST                       = 134,    // spellID, castFlags
     SMART_ACTION_PLAY_CINEMATIC                     = 135,    // entry, cinematic
-    SMART_ACTION_SET_MOVEMENT_SPEED                 = 136,    // movementType, speedInteger, speedFraction (RESERVED, PENDING CHERRYPICK)
+    SMART_ACTION_SET_MOVEMENT_SPEED                 = 136,    // movementType, speedInteger, speedFraction
     SMART_ACTION_PLAY_SPELL_VISUAL_KIT              = 137,    // spellVisualKitId (RESERVED, PENDING CHERRYPICK)
 
     SMART_ACTION_END                                = 138
@@ -1145,6 +1145,13 @@ struct SmartAction
             uint32 entry;
         } cinematic;
 
+        struct
+        {
+            uint32 movementType;
+            uint32 speedInteger;
+            uint32 speedFraction;
+        } movementSpeed;
+
         //! Note for any new future actions
         //! All parameters must have type uint32