fix(Core/Movement): followers match their target's motion speed (#25085)

Co-authored-by: killerwife <killerwife@gmail.com>

src/server/game/Entities/Object/Object.cpp

@@ -995,6 +995,30 @@ std::string Object::GetDebugInfo() const
     return sstr.str();
 }
 
+UnitMoveType MovementInfo::GetSpeedType(uint32 moveFlags)
+{
+    if (moveFlags & MOVEMENTFLAG_FLYING)
+    {
+        if (moveFlags & MOVEMENTFLAG_BACKWARD)
+            return MOVE_FLIGHT_BACK;
+
+        return MOVE_FLIGHT;
+    }
+    else if (moveFlags & MOVEMENTFLAG_SWIMMING)
+    {
+        if (moveFlags & MOVEMENTFLAG_BACKWARD)
+            return MOVE_SWIM_BACK;
+
+        return MOVE_SWIM;
+    }
+    else if (moveFlags & MOVEMENTFLAG_WALKING)
+        return MOVE_WALK;
+    else if (moveFlags & MOVEMENTFLAG_BACKWARD)
+        return MOVE_RUN_BACK;
+
+    return MOVE_RUN;
+}
+
 void MovementInfo::OutDebug()
 {
     LOG_INFO("movement", "MOVEMENT INFO");

src/server/game/Entities/Object/Object.h

@@ -31,6 +31,7 @@
 #include "ObjectGuid.h"
 #include "Optional.h"
 #include "Position.h"
+#include "UnitDefines.h"
 #include "UpdateData.h"
 #include "UpdateMask.h"
 #include "ObjectVisibilityContainer.h"
@@ -344,6 +345,9 @@ struct MovementInfo
     void RemoveMovementFlag(uint32 flag) { flags &= ~flag; }
     [[nodiscard]] bool HasMovementFlag(uint32 flag) const { return flags & flag; }
 
+    [[nodiscard]] UnitMoveType GetSpeedType() const { return GetSpeedType(flags); }
+    [[nodiscard]] static UnitMoveType GetSpeedType(uint32 moveFlags);
+
     [[nodiscard]] uint16 GetExtraMovementFlags() const { return flags2; }
     void AddExtraMovementFlag(uint16 flag) { flags2 |= flag; }
     [[nodiscard]] bool HasExtraMovementFlag(uint16 flag) const { return flags2 & flag; }

src/server/game/Entities/Unit/UnitDefines.h

@@ -15,6 +15,9 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifndef ACORE_UNITDEFINES_H
+#define ACORE_UNITDEFINES_H
+
 #include "Define.h"
 #include "EnumFlag.h"
 
@@ -487,3 +490,5 @@ enum SplineType
     SPLINETYPE_FACING_TARGET    = 3,
     SPLINETYPE_FACING_ANGLE     = 4
 };
+
+#endif // ACORE_UNITDEFINES_H