Jewel Storage full

JewelryStoreFileImplement/Implements/JewelStorage.cs

@@ -13,6 +13,76 @@ namespace JewelryStoreFileImplement.Implements
 {
     public class JewelStorage : IJewelStorage // TODO Lab_2
     {
+        private readonly DataFileSingleton _source;
+        public JewelStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+        public List<JewelViewModel> GetFullList()
+        {
+            return _source.Jewels.Select(x => x.GetViewModel).ToList();
+        }
+        public List<JewelViewModel> GetFilteredList(JewelSearchModel
+       model)
+        {
+            if (string.IsNullOrEmpty(model.JewelName))
+            {
+                return new();
+            }
+            return _source.Jewels
+            .Where(x => x.JewelName.Contains(model.JewelName))
+           .Select(x => x.GetViewModel)
+           .ToList();
+
+        }
+        public JewelViewModel? GetElement(JewelSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.JewelName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Jewels
+            .FirstOrDefault(x =>
+           (!string.IsNullOrEmpty(model.JewelName) && x.JewelName == model.JewelName) ||
+            (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public JewelViewModel? Insert(JewelBindingModel model)
+        {
+            model.Id = _source.Jewels.Count > 0 ? _source.Jewels.Max(x => x.Id) + 1 : 1;
+            var newJewel = Jewel.Create(model);
+            if (newJewel == null)
+            {
+                return null;
+            }
+            _source.Jewels.Add(newJewel);
+            _source.SaveJewels();
+            return newJewel.GetViewModel;
+        }
+
+        public JewelViewModel? Update(JewelBindingModel model)
+        {
+            var component = _source.Jewels.FirstOrDefault(x => x.Id == model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            _source.SaveJewels();
+            return component.GetViewModel;
+
+
+        }
+        public JewelViewModel? Delete(JewelBindingModel model)
+        {
+            var element = _source.Jewels.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                _source.Jewels.Remove(element);
+                _source.SaveJewels();
+                return element.GetViewModel;
+            }
+            return null;
 
         }
     }
+}