Add value diagram calculator saving

DataAccess/DTOs/Converters/Shapes/Point2DRangeFromDTOConvertStrategy.cs

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+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes;
+using StructureHelperCommon.Services;
+
+namespace DataAccess.DTOs
+{
+    public class Point2DRangeFromDTOConvertStrategy : ConvertStrategy<Point2DRange, Point2DRangeDTO>
+    {
+        private IConvertStrategy<Point2D, Point2DDTO> pointConvertStrategy;
+
+        public Point2DRangeFromDTOConvertStrategy(IBaseConvertStrategy baseConvertStrategy) : base(baseConvertStrategy)
+        {
+        }
+
+        public override Point2DRange GetNewItem(Point2DRangeDTO source)
+        {
+            ChildClass = this;
+            CheckSourceObject(source);
+            NewItem = new(source.Id);
+            InitializeStrategies();
+            if (source.StartPoint is not Point2DDTO startPoint)
+            {
+                throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknownObj(source.StartPoint) + ": start point");
+            }
+            if (source.EndPoint is not Point2DDTO endPoint)
+            {
+                throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknownObj(source.StartPoint) + ": end point");
+            }
+            NewItem.StartPoint = pointConvertStrategy.Convert(startPoint);
+            NewItem.EndPoint = pointConvertStrategy.Convert(endPoint);
+            return NewItem;
+        }
+
+        private static void CheckSourceObject(Point2DRangeDTO source)
+        {
+            CheckObject.IsNull(source, ": point range source object");
+            CheckObject.IsNull(source.StartPoint + ": point range start point");
+            CheckObject.IsNull(source.EndPoint + ": point range end point");
+        }
+
+        private void InitializeStrategies()
+        {
+            pointConvertStrategy ??= new Point2DFromDTOConvertStrategy(this);
+        }
+    }
+}

DataAccess/DTOs/Converters/Shapes/Point2DRangeToDTOConvertStrategy.cs

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+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes;
+
+namespace DataAccess.DTOs
+{
+    public class Point2DRangeToDTOConvertStrategy : ConvertStrategy<Point2DRangeDTO, IPoint2DRange>
+    {
+        private IConvertStrategy<Point2DDTO, IPoint2D> pointConvertStrategy = new Point2DToDTOConvertStrategy();
+
+        public Point2DRangeToDTOConvertStrategy(IBaseConvertStrategy baseConvertStrategy) : base(baseConvertStrategy)
+        {
+        }
+
+        public override Point2DRangeDTO GetNewItem(IPoint2DRange source)
+        {
+            ChildClass = this;
+            NewItem = new(source.Id)
+            {
+                StartPoint = pointConvertStrategy.Convert(source.StartPoint),
+                EndPoint = pointConvertStrategy.Convert(source.EndPoint)
+            };
+            return NewItem;
+        }
+    }
+}