Add new strrrups DTOs

StructureHelperCommon/Services/IInterpolateValueLogic.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Services
+{
+    public interface IInterpolateValueLogic
+    {
+        double X1 { get; set; }
+        double Y1 { get; set; }
+        double X2 { get; set; }
+        double Y2 { get; set; }
+        double KnownValueX  { get; set; }
+        double GetValueY();
+    }
+}

StructureHelperCommon/Services/InterpolateValueLogic.cs

@@ -0,0 +1,34 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Services
+{
+    public class InterpolateValueLogic : IInterpolateValueLogic
+    {
+        public double X1 { get; set; }
+        public double Y1 { get; set; }
+        public double X2 { get; set; }
+        public double Y2 { get; set; }
+        public double KnownValueX { get; set; }
+
+        public double GetValueY()
+        {
+            Check();
+            double tangent = (Y2-Y1) / (X2-X1);
+            double value = Y1 + (tangent * (KnownValueX - X1));
+            return value;
+        }
+
+        private void Check()
+        {
+            if (X1 == X2)
+            {
+                throw new StructureHelperException(ErrorStrings.DataIsInCorrect + $": Value X1 = {X1} must be inequal to value X2, but it was");
+            }
+        }
+    }
+}