Add converting beam shear analysis from DTOs

DataAccess/DTOs/Converters/ShapeFromDTOConvertStrategy.cs

@@ -0,0 +1,30 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes;
+
+namespace DataAccess.DTOs
+{
+    internal class ShapeFromDTOConvertStrategy : ConvertStrategy<IShape, IShape>
+    {
+        private IConvertStrategy<RectangleShape, RectangleShapeDTO> rectangleConvertStrategy;
+
+        public ShapeFromDTOConvertStrategy(IBaseConvertStrategy baseConvertStrategy) : base(baseConvertStrategy)
+        {
+        }
+
+        public override IShape GetNewItem(IShape source)
+        {
+            if (source is RectangleShapeDTO rectangleShapeDTO)
+            {
+                rectangleConvertStrategy ??= new DictionaryConvertStrategy<RectangleShape, RectangleShapeDTO>
+                    (this, new RectangleShapeFromDTOConvertStrategy(this));
+                NewItem = rectangleConvertStrategy.Convert(rectangleShapeDTO);
+            }
+            else
+            {
+                throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknownObj(source) + ": shape is unknown");
+            }
+            return NewItem;
+        }
+    }
+}