BlacksmithWorkshop/BlacksmithWorkshopFileImplement/Implements/WorkPieceStorage.cs

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+using BlacksmithWorkshopContracts.BindingModels;
+using BlacksmithWorkshopContracts.SearchModels;
+using BlacksmithWorkshopContracts.StoragesContracts;
+using BlacksmithWorkshopContracts.ViewModels;
+using BlacksmithWorkshopFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BlacksmithWorkshopFileImplement.Implements
+{
+    //реализация интерфейса хранилища заготовок
+    public class WorkPieceStorage : IWorkPieceStorage
+    {
+        private readonly DataFileSingleton source;
+
+        public WorkPieceStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+
+        public List<WorkPieceViewModel> GetFullList()
+        {
+            return source.WorkPieces.Select(x => x.GetViewModel).ToList();
+        }
+
+        public List<WorkPieceViewModel> GetFilteredList(WorkPieceSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.WorkPieceName))
+            {
+                return new();
+            }
+
+            return source.WorkPieces.Where(x => x.WorkPieceName.Contains(model.WorkPieceName)).Select(x => x.GetViewModel).ToList();
+        }
+
+        public WorkPieceViewModel? GetElement(WorkPieceSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.WorkPieceName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+
+            return source.WorkPieces.FirstOrDefault(x => (!string.IsNullOrEmpty(model.WorkPieceName) && x.WorkPieceName == model.WorkPieceName)
+                || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+
+        public WorkPieceViewModel? Insert(WorkPieceBindingModel model)
+        {
+            model.Id = source.WorkPieces.Count > 0 ? source.WorkPieces.Max(x => x.Id) + 1 : 1;
+
+            var newWorkPiece = WorkPiece.Create(model);
+            
+            if (newWorkPiece == null)
+            {
+                return null;
+            }
+
+            source.WorkPieces.Add(newWorkPiece);
+            source.SaveWorkPieces();
+
+            return newWorkPiece.GetViewModel;
+        }
+
+        public WorkPieceViewModel? Update(WorkPieceBindingModel model)
+        {
+            var workPiece = source.WorkPieces.FirstOrDefault(x => x.Id == model.Id);
+            
+            if (workPiece == null)
+            {
+                return null;
+            }
+
+            workPiece.Update(model);
+            source.SaveWorkPieces();
+            return workPiece.GetViewModel;
+        }
+
+        public WorkPieceViewModel? Delete(WorkPieceBindingModel model)
+        {
+            var element = source.WorkPieces.FirstOrDefault(x => x.Id == model.Id);
+            
+            if (element != null)
+            {
+                source.WorkPieces.Remove(element);
+                source.SaveWorkPieces();
+                return element.GetViewModel;
+            }
+
+            return null;
+
+        }
+    }
+}