Change shear calculator add crack export to excel

StructureHelperLogics/Models/BeamShears/Logics/CheckStrategies/CheckBeamShearSectionLogic.cs

@@ -35,7 +35,7 @@ namespace StructureHelperLogics.Models.BeamShears.Logics
             }
             else
             {
-                if (Entity.Material is null)
+                if (Entity.ConcreteMaterial is null)
                 {
                     result = false;
                     TraceMessage($"\nMaterial of cross-section is not assigned");

StructureHelperLogics/Models/BeamShears/Logics/CheckStrategies/CheckSectionLogicInputDataLogic.cs

@@ -0,0 +1,50 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models;
+
+namespace StructureHelperLogics.Models.BeamShears
+{
+    internal class CheckSectionLogicInputDataLogic : ICheckInputDataLogic<IBeamShearSectionLogicInputData>
+    {
+        private bool result;
+        private string checkResult;
+        public CheckSectionLogicInputDataLogic(IShiftTraceLogger? traceLogger)
+        {
+            TraceLogger = traceLogger;
+        }
+
+        public IBeamShearSectionLogicInputData InputData { get; set; }
+
+        public string CheckResult => checkResult;
+
+        public IShiftTraceLogger? TraceLogger { get; set; }
+
+        public bool Check()
+        {
+            result = true;
+            checkResult = string.Empty;
+            if (InputData is null)
+            {
+                result = false;
+                string errorString = ErrorStrings.ParameterIsNull + ": Input data";
+                throw new StructureHelperException(errorString);
+            }
+            if (InputData.ForceTuple is null)
+            {
+                result = false;
+                TraceMessage("Force tuple is null");
+            }
+            if (InputData.ForceTuple.Qy < 0)
+            {
+                result = false;
+                TraceMessage($"Shear force Qy = {InputData.ForceTuple.Qy} must be positive");
+            }
+            return result;
+        }
+        private void TraceMessage(string errorString)
+        {
+            checkResult += errorString;
+            TraceLogger?.AddMessage(errorString);
+        }
+    }
+}