Реализована логика хранилища магазинов

ConfectionaryFileImplement/ShopStorage.cs

@@ -2,6 +2,7 @@
 using ConfectioneryContracts.SearchModels;
 using ConfectioneryContracts.StoragesContract;
 using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels.Models;
 
 namespace ConfectioneryFileImplement
 {
@@ -15,93 +16,97 @@ namespace ConfectioneryFileImplement
 
         public ShopViewModel? Delete(ShopBindingModel model)
         {
-            for (int i = 0; i < _source.Shops.Count; ++i)
+            var element = _source.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
             {
-                if (_source.Shops[i].Id == model.Id)
+                _source.Shops.Remove(element);
-                {
+                _source.SaveShops();
-                    var element = _source.Shops[i];
-                    _source.Shops.RemoveAt(i);
                 return element.GetViewModel;
             }
-            }
             return null;
         }
 
         public ShopViewModel? GetElement(ShopSearchModel model)
         {
-            if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue)
+            if (!model.Id.HasValue)
             {
                 return null;
             }
-            foreach (var shop in _source.Shops)
+            return _source.Shops.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
-            {
-                if ((!string.IsNullOrEmpty(model.Name) &&
-                shop.Name == model.Name) ||
-                (model.Id.HasValue && shop.Id == model.Id))
-                {
-                    return shop.GetViewModel;
-                }
-            }
-            return null;
         }
 
         public List<ShopViewModel> GetFilteredList(ShopSearchModel model)
         {
-            var result = new List<ShopViewModel>();
             if (string.IsNullOrEmpty(model.Name))
             {
-                return result;
+                return new();
             }
-            foreach (var shop in _source.Shops)
+            return _source.Shops
-            {
+                .Select(x => x.GetViewModel)
-                if (shop.Name.Contains(model.Name ?? string.Empty))
+                .Where(x => x.Name.Contains(model.Name ?? string.Empty))
-                {
+                .ToList();
-                    result.Add(shop.GetViewModel);
-                }
-            }
-            return result;
         }
 
         public List<ShopViewModel> GetFullList()
         {
-            var result = new List<ShopViewModel>();
+            return _source.Shops
-            foreach (var shop in _source.Shops)
+                .Select(shop => shop.GetViewModel)
-            {
+                .ToList();
-                result.Add(shop.GetViewModel);
-            }
-            return result;
         }
 
         public ShopViewModel? Insert(ShopBindingModel model)
         {
-            model.Id = 1;
+            model.Id = _source.Shops.Count > 0 ? _source.Shops.Max(x => x.Id) + 1 : 1;
-            foreach (var shop in _source.Shops)
-            {
-                if (model.Id <= shop.Id)
-                {
-                    model.Id = shop.Id + 1;
-                }
-            }
             var newShop = Shop.Create(model);
             if (newShop == null)
             {
                 return null;
             }
             _source.Shops.Add(newShop);
+            _source.SaveShops();
             return newShop.GetViewModel;
         }
 
         public ShopViewModel? Update(ShopBindingModel model)
         {
-            foreach (var shop in _source.Shops)
+            var shop = _source.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (shop == null)
             {
-                if (shop.Id == model.Id)
-                {
-                    shop.Update(model);
-                    return shop.GetViewModel;
-                }
-            }
                 return null;
             }
+            shop.Update(model);
+            _source.SaveShops();
+            return shop.GetViewModel;
+        }
+
+        public bool HasNeedPastries(IPastryModel pastry, int needCount)
+        {
+            var resultCount = _source.Shops
+                .Select(shop => shop.Pastries
+                    .FirstOrDefault(x => x.Key == pastry.Id).Value.Item2)
+                .Sum();
+            return resultCount >= needCount;
+        }
+
+        public bool SellPastries(IPastryModel pastry, int needCount)
+        {
+            if (!HasNeedPastries(pastry, needCount))
+            {
+                return false;
+            }
+            foreach (var pair in _source.Shops.Where(shop => shop.Pastries.ContainsKey(pastry.Id)))
+            {
+                var tuple = pair.Pastries[pastry.Id];
+                var diff = Math.Min(tuple.Item2, needCount);
+                pair.Pastries[pastry.Id] = (tuple.Item1, tuple.Item2 - diff);
+                needCount -= diff;
+                if (needCount <= 0)
+                {
+                    return true;
+                }
+            }
+                
+            return true;
+        }
     }
 }

ConfectionaryListImplement/ShopStorage.cs

@@ -2,6 +2,7 @@
 using ConfectioneryContracts.SearchModels;
 using ConfectioneryContracts.StoragesContract;
 using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels.Models;
 
 namespace ConfectioneryListImplement
 {
@@ -72,6 +73,11 @@ namespace ConfectioneryListImplement
             return result;
         }
 
+        public bool HasNeedPastries(IPastryModel pastry, int needCount)
+        {
+            throw new NotImplementedException();
+        }
+
         public ShopViewModel? Insert(ShopBindingModel model)
         {
             model.Id = 1;
@@ -91,6 +97,11 @@ namespace ConfectioneryListImplement
             return newShop.GetViewModel;
         }
 
+        public bool SellPastries(IPastryModel pastry, int needCount)
+        {
+            throw new NotImplementedException();
+        }
+
         public ShopViewModel? Update(ShopBindingModel model)
         {
             foreach (var shop in _source.Shops)

ConfectioneryContracts/StoragesContract/IShopStorage.cs

@@ -1,6 +1,7 @@
 using ConfectioneryContracts.BindingModels;
 using ConfectioneryContracts.SearchModels;
 using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels.Models;
 
 namespace ConfectioneryContracts.StoragesContract
 {
@@ -12,5 +13,8 @@ namespace ConfectioneryContracts.StoragesContract
         ShopViewModel? Insert(ShopBindingModel model);
         ShopViewModel? Update(ShopBindingModel model);
         ShopViewModel? Delete(ShopBindingModel model);
+
+        bool HasNeedPastries(IPastryModel pastry, int needCount);
+        public bool SellPastries(IPastryModel pastry, int needCount);
     }
 }