Component Storage

JewelryStoreFileImplement/Implements/ComponentStorage .cs

@@ -11,8 +11,80 @@ using System.Threading.Tasks;
 
 namespace JewelryStoreFileImplement.Implements
 {
-    public class ComponentStorage : IComponentStorage   // TODO Lab_2
+    public class ComponentStorage : IComponentStorage
     {
+        private readonly DataFileSingleton _source;
+        public ComponentStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+        public List<ComponentViewModel> GetFullList()
+        {
+            return _source.Components.Select(x => x.GetViewModel).ToList();
+        }
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel
+       model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            return _source.Components
+            .Where(x => x.ComponentName.Contains(model.ComponentName))
+           .Select(x => x.GetViewModel)
+           .ToList();
+
+        }
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Components
+            .FirstOrDefault(x =>
+           (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName == model.ComponentName) ||
+            (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            model.Id = _source.Components.Count > 0 ? _source.Components.Max(x =>
+x.Id) + 1 : 1;
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            _source.Components.Add(newComponent);
+            _source.SaveComponents();
+            return newComponent.GetViewModel;
+        }
+       
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            var component = _source.Components.FirstOrDefault(x => x.Id ==
+model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            _source.SaveComponents();
+            return component.GetViewModel;
+
+
+        }
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            var element = _source.Components.FirstOrDefault(x => x.Id ==model.Id);
+            if (element != null)
+            {
+                _source.Components.Remove(element);
+                _source.SaveComponents();
+                return element.GetViewModel;
+            }
+            return null;
 
         }
     }
+}