ConfectionaryBusinessLogic/OrderLogic.cs

@@ -12,10 +12,14 @@ namespace ConfectioneryBusinessLogic.BusinessLogics
     {
         private readonly ILogger _logger;
         private readonly IOrderStorage _orderStorage;
+        private readonly IPastryStorage _pastryStorage;
+        private readonly IShopLogic _shopLogic;
 
-        public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage)
+        public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage, IPastryStorage pastryStorage, IShopLogic shopLogic)
         {
             _logger = logger;
+            _shopLogic = shopLogic;
+            _pastryStorage = pastryStorage;
             _orderStorage = orderStorage;
         }
 
@@ -96,6 +100,15 @@ namespace ConfectioneryBusinessLogic.BusinessLogics
                     $"Доступный статус: {(OrderStatus)((int)vmodel.Status + 1)}", 
                     nameof(vmodel));
             }
+            if (orderStatus == OrderStatus.Готов)
+            {
+                var vpastry = _pastryStorage.GetElement(new() { Id = vmodel.PastryId });
+
+                if (vpastry == null || !_shopLogic.AddPastriesInShops(vpastry, vmodel.Count)) 
+                {
+                    throw new Exception($"Не удалось заполнить магазины изделием '{vpastry?.PastryName ?? string.Empty}' из заказа {vmodel.Id}");
+                }
+            }
             model.Status = orderStatus;
             model.DateCreate = vmodel.DateCreate;
             if (model.DateImplement == null)

ConfectionaryBusinessLogic/ShopLogic.cs

@@ -101,6 +101,13 @@ namespace ConfectioneryBusinessLogic
                 throw new ArgumentNullException("Нет названия магазина",
                 nameof(model.Name));
             }
+            if (model.MaxCountPastries < 0)
+            {
+                throw new ArgumentException(
+                    "Максимальное количество изделий в магазине не должно быть отрицательным",
+                    nameof(model.MaxCountPastries));
+            }
+
             _logger.LogInformation("Shop. ShopName:{0}.Address:{1}. Id: {2}",
                 model.Name, model.Address, model.Id);
             var element = _shopStorage.GetElement(new ShopSearchModel
@@ -150,5 +157,55 @@ namespace ConfectioneryBusinessLogic
             });
             return true;
         }
+
+
+        public int GetFreePlacesWithPastriesInShops(int countPastries)
+        {
+            // Сумма разностей между максимальный кол-вом изделий и суммой всех изделий в магазине
+            return _shopStorage.GetFullList()
+                .Select(x => x.MaxCountPastries - x.Pastries
+                    .Select(p => p.Value.Item2).Sum())
+                .Sum() - countPastries;
+        }
+
+        public bool AddPastriesInShops(IPastryModel pastry, int count)
+        {
+            if (count <= 0)
+            {
+                _logger.LogWarning("AddPastriesInShops. Количество добавляемых изделий должно быть больше 0. Количество - {count}", count);
+                return false;
+            }
+            var freePlaces = GetFreePlacesWithPastriesInShops(count);
+            if (freePlaces < 0)
+            {
+                _logger.LogInformation("AddPastriesInShops. Не удалось добавить изделия в магазины, поскольку они переполнены." +
+                    "Освободите магазины на {places} изделий", -freePlaces);
+                return false;
+            }
+            foreach (var shop in _shopStorage.GetFullList())
+            {
+                var cnt = Math.Min(count, shop.MaxCountPastries - shop.Pastries.Select(x => x.Value.Item2).Sum());
+                if (cnt <= 0)
+                {
+                    continue;
+                }
+                if (!AddPastry(new() { Id = shop.Id }, pastry, cnt))
+                {
+                    _logger.LogWarning("При добавления изделий во все магазины произошла ошибка");
+                    return false;
+                }
+                count -= cnt;
+                if (count == 0)
+                {
+                    return true;
+                }
+            }
+            return true;
+        }
+
+        public bool SellPastries(IPastryModel pastry, int needCount)
+        {
+            return _shopStorage.SellPastries(pastry, needCount);
+        }
     }
 }

ConfectionaryFileImplement/Component.cs

@@ -0,0 +1,60 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels.Models;
+using System.Xml.Linq;
+
+
+namespace ConfectioneryFileImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        public string ComponentName { get; private set; } = string.Empty;
+        public double Cost { get; set; }
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public static Component? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ComponentName = element.Element("ComponentName")!.Value,
+                Cost = Convert.ToDouble(element.Element("Cost")!.Value)
+            };
+        }
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+        public XElement GetXElement => new("Component",
+            new XAttribute("Id", Id),
+            new XElement("ComponentName", ComponentName),
+            new XElement("Cost", Cost.ToString()));
+    }
+}

ConfectionaryFileImplement/ComponentStorage.cs

@@ -0,0 +1,79 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.SearchModels;
+using ConfectioneryContracts.StoragesContract;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryFileImplement.Models;
+
+namespace ConfectioneryFileImplement.Implements
+{
+    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;
+        }
+    }
+}

ConfectionaryFileImplement/ConfectioneryFileImplement.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ConfectioneryContracts\ConfectioneryContracts.csproj" />
+    <ProjectReference Include="..\ConfectioneryDataModels\ConfectioneryDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

ConfectionaryFileImplement/DataFileSingleton.cs

@@ -0,0 +1,54 @@
+using ConfectioneryFileImplement.Models;
+using System.Xml.Linq;
+
+namespace ConfectioneryFileImplement
+{
+    public class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+        private readonly string ComponentFileName = "Component.xml";
+        private readonly string OrderFileName = "Order.xml";
+        private readonly string PastryFileName = "Pastry.xml";
+        private readonly string ShopFileName = "Shop.xml";
+        public List<Component> Components { get; private set; }
+        public List<Order> Orders { get; private set; }
+        public List<Pastry> Pastries { get; private set; }
+        public List<Shop> Shops { get; private set; }
+
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+            return instance;
+        }
+        public void SaveComponents() => SaveData(Components, ComponentFileName, "Components", x => x.GetXElement);
+        public void SavePastries() => SaveData(Pastries, PastryFileName, "Pastries", x => x.GetXElement);
+        public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
+        public void SaveShops() => SaveData(Shops, ShopFileName, "Shops", x => x.GetXElement);
+
+        private DataFileSingleton()
+        {
+            Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
+            Pastries = LoadData(PastryFileName, "Pastry", x => Pastry.Create(x)!)!;
+            Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
+            Shops = LoadData(ShopFileName, "Shop", x => Shop.Create(x)!)!;
+        }
+        private static List<T>? LoadData<T>(string filename, string xmlNodeName, Func<XElement, T> selectFunction)
+        {
+            if (File.Exists(filename))
+            {
+                return XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+            }
+            return new List<T>();
+        }
+        private static void SaveData<T>(List<T> data, string filename, string xmlNodeName, Func<T, XElement> selectFunction)
+        {
+            if (data != null)
+            {
+                new XDocument(new XElement(xmlNodeName, data.Select(selectFunction).ToArray())).Save(filename);
+            }
+        }
+    }
+}

ConfectionaryFileImplement/Order.cs

@@ -0,0 +1,96 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels.Enums;
+using ConfectioneryDataModels.Models;
+using System.Xml.Linq;
+
+namespace ConfectioneryFileImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+
+        public int PastryId { get; private set; }
+
+        public int Count { get; private set; }
+
+        public double Sum { get; private set; }
+
+        public OrderStatus Status { get; private set; }
+
+        public DateTime DateCreate { get; private set; }
+
+        public DateTime? DateImplement { get; private set; }
+
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                PastryId = model.PastryId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement,
+                Id = model.Id,
+            };
+        }
+        public static Order? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            var dateImplement = element.Element("DateImplement")!.Value;
+            return new()
+            {
+                Id            = Convert.ToInt32(element.Attribute("Id")!.Value),
+                Sum           = Convert.ToDouble(element.Element("Sum")!.Value),
+                Count         = Convert.ToInt32(element.Element("Count")!.Value),
+                Status        = (OrderStatus)Convert.ToInt32(element.Element("Status")!.Value),
+                PastryId      = Convert.ToInt32(element.Element("PastryId")!.Value),
+                DateCreate    = Convert.ToDateTime(element.Element("DateCreate")!.Value),
+                DateImplement = string.IsNullOrEmpty(dateImplement) ? null : Convert.ToDateTime(dateImplement),
+            };
+        }
+
+        public void Update(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            PastryId = model.PastryId;
+            Count = model.Count;
+            Sum = model.Sum;
+            Status = model.Status;
+            DateCreate = model.DateCreate;
+            DateImplement = model.DateImplement;
+            Id = model.Id;
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            PastryName = DataFileSingleton.GetInstance().Pastries.FirstOrDefault(x => x.Id == PastryId)?.PastryName ?? string.Empty,
+            PastryId = PastryId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+            Id = Id,
+        };
+        public XElement GetXElement => new("Order",
+            new XAttribute("Id", Id),
+            new XElement("PastryId", PastryId),
+            new XElement("Count", Count),
+            new XElement("Sum", Sum.ToString()),
+            new XElement("Status", (int)Status),
+            new XElement("DateCreate", DateCreate),
+            new XElement("DateImplement", DateImplement)
+        );
+    }
+}

ConfectionaryFileImplement/OrderStorage.cs

@@ -0,0 +1,76 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.SearchModels;
+using ConfectioneryContracts.StoragesContract;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryFileImplement.Models;
+
+namespace ConfectioneryFileImplement
+{
+    public class OrderStorage : IOrderStorage
+    {
+        private readonly DataFileSingleton _source;
+        public OrderStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            var element = _source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                _source.Orders.Remove(element);
+                _source.SaveOrders();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Orders.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
+        }
+
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            var result = GetElement(model);
+            return result != null ? new() { result } : new();
+        }
+
+        public List<OrderViewModel> GetFullList()
+        {
+            return _source.Orders
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            model.Id = _source.Orders.Count > 0 ? _source.Orders.Max(x => x.Id) + 1 : 1;
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            _source.Orders.Add(newOrder);
+            _source.SaveOrders();
+            return newOrder.GetViewModel;
+        }
+
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            var order = _source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            _source.SaveOrders();
+            return order.GetViewModel;
+        }
+    }
+}

ConfectionaryFileImplement/Pastry.cs

@@ -0,0 +1,86 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels.Models;
+using System.Xml.Linq;
+
+namespace ConfectioneryFileImplement.Models
+{
+    public class Pastry : IPastryModel
+    {
+        public int Id { get; private set; }
+        public string PastryName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, int> Components { get; private set; } = new();
+        private Dictionary<int, (IComponentModel, int)>? _PastryComponents = null;
+        public Dictionary<int, (IComponentModel, int)> PastryComponents
+        {
+            get
+            {
+                if (_PastryComponents == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _PastryComponents = Components.ToDictionary(x => x.Key, y =>
+                    ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!,
+                    y.Value));
+                }
+                return _PastryComponents;
+            }
+        }
+        public static Pastry? Create(PastryBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Pastry()
+            {
+                Id = model.Id,
+                PastryName = model.PastryName,
+                Price = model.Price,
+                Components = model.PastryComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
+            };
+        }
+        public static Pastry? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Pastry()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                PastryName = element.Element("PastryName")!.Value,
+                Price = Convert.ToDouble(element.Element("Price")!.Value),
+                Components = element.Element("PastryComponents")!.Elements("PastryComponent").ToDictionary(x =>
+                            Convert.ToInt32(x.Element("Key")?.Value), x =>
+                            Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+        public void Update(PastryBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            PastryName = model.PastryName;
+            Price = model.Price;
+            Components = model.PastryComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
+            _PastryComponents = null;
+        }
+        public PastryViewModel GetViewModel => new()
+        {
+            Id = Id,
+            PastryName = PastryName,
+            Price = Price,
+            PastryComponents = PastryComponents
+        };
+        public XElement GetXElement => new("Pastry",
+            new XAttribute("Id", Id),
+            new XElement("PastryName", PastryName),
+            new XElement("Price", Price.ToString()),
+            new XElement("PastryComponents", Components.Select(x =>
+            new XElement("PastryComponent",
+            new XElement("Key", x.Key),
+            new XElement("Value", x.Value))).ToArray()));
+    }
+}

ConfectionaryFileImplement/PastryStorage.cs

@@ -0,0 +1,85 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.SearchModels;
+using ConfectioneryContracts.StoragesContract;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryFileImplement.Models;
+
+namespace ConfectioneryFileImplement
+{
+    public class PastryStorage : IPastryStorage
+    {
+        private readonly DataFileSingleton _source;
+        public PastryStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+
+        public PastryViewModel? Delete(PastryBindingModel model)
+        {
+            var element = _source.Pastries.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                _source.Pastries.Remove(element);
+                _source.SavePastries();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public PastryViewModel? GetElement(PastrySearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.PastryName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Pastries.FirstOrDefault
+                (x => (!string.IsNullOrEmpty(model.PastryName) && x.PastryName == model.PastryName) ||
+                      (model.Id.HasValue && x.Id == model.Id)
+                )?.GetViewModel;
+        }
+
+        public List<PastryViewModel> GetFilteredList(PastrySearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.PastryName))
+            {
+                return new();
+            }
+            return _source.Pastries
+                .Select(x => x.GetViewModel)
+                .Where(x => x.PastryName.Contains(model.PastryName))
+                .ToList();
+        }
+
+        public List<PastryViewModel> GetFullList()
+        {
+            return _source.Pastries
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public PastryViewModel? Insert(PastryBindingModel model)
+        {
+            model.Id = _source.Pastries.Count > 0 ? _source.Pastries.Max(x => x.Id) + 1 : 1;
+            var newPastry = Pastry.Create(model);
+            if (newPastry == null)
+            {
+                return null;
+            }
+            _source.Pastries.Add(newPastry);
+            _source.SavePastries();
+            return newPastry.GetViewModel;
+        }
+
+        public PastryViewModel? Update(PastryBindingModel model)
+        {
+            var pastry = _source.Pastries.FirstOrDefault(x => x.Id == model.Id);
+            if (pastry == null)
+            {
+                return null;
+            }
+            pastry.Update(model);
+            _source.SavePastries();
+            return pastry.GetViewModel;
+        }
+    }
+}

ConfectionaryFileImplement/Shop.cs

@@ -0,0 +1,109 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels;
+using ConfectioneryDataModels.Models;
+using System.Xml.Linq;
+
+namespace ConfectioneryFileImplement
+{
+    public class Shop : IShopModel
+    {
+        public string Name { get; private set; } = string.Empty;
+
+        public string Address { get; private set; } = string.Empty;
+
+        public int MaxCountPastries { get; private set; }
+
+        public DateTime DateOpening { get; private set; }
+
+        public Dictionary<int, int> CountPastries { get; private set; } = new();
+
+        private Dictionary<int, (IPastryModel, int)>? _cachedPastries = null;
+        public  Dictionary<int, (IPastryModel, int)> Pastries
+        {
+            get
+            {
+                if (_cachedPastries == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _cachedPastries = CountPastries
+                        .ToDictionary(x => x.Key, x => (source.Pastries
+                        .FirstOrDefault(y => y.Id == x.Key)! as IPastryModel, x.Value));
+                }
+                return _cachedPastries;
+            }
+        }
+
+        public int Id { get; private set; }
+
+        public static Shop? Create(ShopBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Shop()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Address = model.Address,
+                DateOpening = model.DateOpening,
+                MaxCountPastries = model.MaxCountPastries,
+                CountPastries = new()
+            };
+        }
+        public static Shop? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new()
+            {
+                Id               = Convert.ToInt32(element.Attribute("Id")!.Value),
+                Name             = element.Element("Name")!.Value,
+                Address          = element.Element("Address")!.Value,
+                DateOpening      = Convert.ToDateTime(element.Element("DateOpening")!.Value),
+                MaxCountPastries = Convert.ToInt32(element.Element("MaxCountPastries")!.Value),
+                CountPastries    = element.Element("CountPastries")!.Elements("CountPastry")
+                    .ToDictionary(
+                        x => Convert.ToInt32(x.Element("Key")?.Value),
+                        x => Convert.ToInt32(x.Element("Value")?.Value)
+                    )
+            };   
+        }
+        public void Update(ShopBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Name = model.Name;
+            Address = model.Address;
+            DateOpening = model.DateOpening;
+            CountPastries = model.Pastries.ToDictionary(x => x.Key, x => x.Value.Item2);
+            _cachedPastries = null;
+        }
+        public ShopViewModel GetViewModel => new()
+        {
+            Id = Id,
+            Name = Name,
+            Address = Address,
+            Pastries = Pastries,
+            DateOpening = DateOpening,
+            MaxCountPastries = MaxCountPastries,
+        };
+        public XElement GetXElement => new("Shop",
+             new XAttribute("Id", Id),
+             new XElement("Name", Name),
+             new XElement("Address", Address),
+             new XElement("DateOpening", DateOpening),
+             new XElement("MaxCountPastries", MaxCountPastries),
+             new XElement("CountPastries", CountPastries
+                 .Select(x => new XElement("CountPastry",
+                     new XElement("Key", x.Key),
+                     new XElement("Value", x.Value))
+                 ))
+         );
+    }
+}

ConfectionaryFileImplement/ShopStorage.cs

@@ -0,0 +1,114 @@
+using ConfectioneryContracts.BindingModels;
+using ConfectioneryContracts.SearchModels;
+using ConfectioneryContracts.StoragesContract;
+using ConfectioneryContracts.ViewModels;
+using ConfectioneryDataModels;
+using ConfectioneryDataModels.Models;
+
+namespace ConfectioneryFileImplement
+{
+    public class ShopStorage : IShopStorage
+    {
+        private readonly DataFileSingleton _source;
+        public ShopStorage()
+        {
+            _source = DataFileSingleton.GetInstance();
+        }
+
+        public ShopViewModel? Delete(ShopBindingModel model)
+        {
+            var element = _source.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                _source.Shops.Remove(element);
+                _source.SaveShops();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public ShopViewModel? GetElement(ShopSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            return _source.Shops.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
+        }
+
+        public List<ShopViewModel> GetFilteredList(ShopSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                return new();
+            }
+            return _source.Shops
+                .Select(x => x.GetViewModel)
+                .Where(x => x.Name.Contains(model.Name ?? string.Empty))
+                .ToList();
+        }
+
+        public List<ShopViewModel> GetFullList()
+        {
+            return _source.Shops
+                .Select(shop => shop.GetViewModel)
+                .ToList();
+        }
+
+        public ShopViewModel? Insert(ShopBindingModel model)
+        {
+            model.Id = _source.Shops.Count > 0 ? _source.Shops.Max(x => x.Id) + 1 : 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)
+        {
+            var shop = _source.Shops.FirstOrDefault(x => x.Id == model.Id);
+            if (shop == null)
+            {
+                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 shop in _source.Shops.Where(shop => shop.Pastries.ContainsKey(pastry.Id)))
+            {
+                var tuple = shop.Pastries[pastry.Id];
+                var diff = Math.Min(tuple.Item2, needCount);
+                shop.Pastries[pastry.Id] = (tuple.Item1, tuple.Item2 - diff);
+                
+                needCount -= diff;
+                if (needCount <= 0)
+                {
+                    return true;
+                }
+            }
+                
+            return true;
+        }
+    }
+}

ConfectionaryListImplement/Shop.cs

@@ -11,6 +11,8 @@ namespace ConfectioneryListImplement
 
         public string Address { get; private set; } = string.Empty;
 
+        public int MaxCountPastries { get; private set; }
+
         public DateTime DateOpening { get; private set; }
 
         public Dictionary<int, (IPastryModel, int)> Pastries
@@ -33,6 +35,7 @@ namespace ConfectioneryListImplement
                 Name = model.Name,
                 Address = model.Address,
                 DateOpening = model.DateOpening,
+                MaxCountPastries = model.MaxCountPastries,
                 Pastries = new()
             };
         }
@@ -45,6 +48,7 @@ namespace ConfectioneryListImplement
             Name = model.Name;
             Address = model.Address;
             DateOpening = model.DateOpening;
+            MaxCountPastries = model.MaxCountPastries;
             Pastries = model.Pastries;
         }
         public ShopViewModel GetViewModel => new()
@@ -54,6 +58,7 @@ namespace ConfectioneryListImplement
             Address = Address,
             Pastries = Pastries,
             DateOpening = DateOpening,
+            MaxCountPastries = MaxCountPastries,
         };
     }
 }

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)

Confectionery.sln

@@ -9,9 +9,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConfectioneryDataModels", "
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConfectioneryContracts", "ConfectioneryContracts\ConfectioneryContracts.csproj", "{28EC043D-88E8-48DA-B5E8-2DE5659EB1BD}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConfectioneryBusinessLogic", "ConfectionaryBusinessLogic\ConfectioneryBusinessLogic.csproj", "{82EF78A8-98EC-490A-8D66-66909E5431E2}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConfectioneryBusinessLogic", "ConfectionaryBusinessLogic\ConfectioneryBusinessLogic.csproj", "{82EF78A8-98EC-490A-8D66-66909E5431E2}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConfectioneryListImplement", "ConfectionaryListImplement\ConfectioneryListImplement.csproj", "{0A7B118B-9B7C-4796-9846-66026159723E}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConfectioneryListImplement", "ConfectionaryListImplement\ConfectioneryListImplement.csproj", "{0A7B118B-9B7C-4796-9846-66026159723E}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConfectioneryFileImplement", "ConfectionaryFileImplement\ConfectioneryFileImplement.csproj", "{47A2EA59-4443-487E-85F4-AC49C04B7211}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -39,6 +41,10 @@ Global
 		{0A7B118B-9B7C-4796-9846-66026159723E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0A7B118B-9B7C-4796-9846-66026159723E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0A7B118B-9B7C-4796-9846-66026159723E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{47A2EA59-4443-487E-85F4-AC49C04B7211}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{47A2EA59-4443-487E-85F4-AC49C04B7211}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{47A2EA59-4443-487E-85F4-AC49C04B7211}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{47A2EA59-4443-487E-85F4-AC49C04B7211}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Confectionery/ConfectioneryView.csproj

@@ -15,6 +15,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\ConfectionaryBusinessLogic\ConfectioneryBusinessLogic.csproj" />
+    <ProjectReference Include="..\ConfectionaryFileImplement\ConfectioneryFileImplement.csproj" />
     <ProjectReference Include="..\ConfectionaryListImplement\ConfectioneryListImplement.csproj" />
     <ProjectReference Include="..\ConfectioneryContracts\ConfectioneryContracts.csproj" />
   </ItemGroup>

Confectionery/FormMain.Designer.cs

@@ -40,6 +40,7 @@
             this.button3 = new System.Windows.Forms.Button();
             this.button4 = new System.Windows.Forms.Button();
             this.buttonAddPastryInShop = new System.Windows.Forms.Button();
+            this.buttonSellPastry = new System.Windows.Forms.Button();
             this.menuStrip1.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)(this.dataGridView)).BeginInit();
             this.SuspendLayout();
@@ -94,7 +95,7 @@
             this.dataGridView.Location = new System.Drawing.Point(12, 27);
             this.dataGridView.Name = "dataGridView";
             this.dataGridView.RowTemplate.Height = 25;
-            this.dataGridView.Size = new System.Drawing.Size(606, 341);
+            this.dataGridView.Size = new System.Drawing.Size(606, 399);
             this.dataGridView.TabIndex = 1;
             // 
             // buttonCreateOrder
@@ -155,7 +156,7 @@
             // buttonAddPastryInShop
             // 
             this.buttonAddPastryInShop.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
-            this.buttonAddPastryInShop.Location = new System.Drawing.Point(624, 326);
+            this.buttonAddPastryInShop.Location = new System.Drawing.Point(624, 384);
             this.buttonAddPastryInShop.Name = "buttonAddPastryInShop";
             this.buttonAddPastryInShop.Size = new System.Drawing.Size(147, 31);
             this.buttonAddPastryInShop.TabIndex = 7;
@@ -163,11 +164,23 @@
             this.buttonAddPastryInShop.UseVisualStyleBackColor = true;
             this.buttonAddPastryInShop.Click += new System.EventHandler(this.ButtonAddPastryInShop_Click);
             // 
+            // buttonSellPastry
+            // 
+            this.buttonSellPastry.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.buttonSellPastry.Location = new System.Drawing.Point(624, 331);
+            this.buttonSellPastry.Name = "buttonSellPastry";
+            this.buttonSellPastry.Size = new System.Drawing.Size(147, 31);
+            this.buttonSellPastry.TabIndex = 8;
+            this.buttonSellPastry.Text = "Продать изделие";
+            this.buttonSellPastry.UseVisualStyleBackColor = true;
+            this.buttonSellPastry.Click += new System.EventHandler(this.ButtonSellPastry_Click);
+            // 
             // FormMain
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(783, 380);
+            this.ClientSize = new System.Drawing.Size(783, 438);
+            this.Controls.Add(this.buttonSellPastry);
             this.Controls.Add(this.buttonAddPastryInShop);
             this.Controls.Add(this.button4);
             this.Controls.Add(this.button3);
@@ -202,5 +215,6 @@
         private ToolStripMenuItem componentToolStripMenuItem;
         private ToolStripMenuItem ShopsToolStripMenuItem;
         private Button buttonAddPastryInShop;
+        private Button buttonSellPastry;
     }
 }

Confectionery/FormMain.cs

@@ -170,5 +170,14 @@ namespace ConfectioneryView
                 form.ShowDialog();
             }
         }
+
+        private void ButtonSellPastry_Click(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(FormSellPastry));
+            if (service is FormSellPastry form)
+            {
+                form.ShowDialog();
+            }
+        }
     }
 }

Confectionery/FormSellPastry.Designer.cs

@@ -0,0 +1,133 @@
+namespace ConfectioneryView
+{
+    partial class FormSellPastry
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.comboBoxPastry = new System.Windows.Forms.ComboBox();
+            this.label1 = new System.Windows.Forms.Label();
+            this.label2 = new System.Windows.Forms.Label();
+            this.numericUpDownCount = new System.Windows.Forms.NumericUpDown();
+            this.buttonSell = new System.Windows.Forms.Button();
+            this.buttonCancel = new System.Windows.Forms.Button();
+            ((System.ComponentModel.ISupportInitialize)(this.numericUpDownCount)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // comboBoxPastry
+            // 
+            this.comboBoxPastry.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.comboBoxPastry.FormattingEnabled = true;
+            this.comboBoxPastry.Location = new System.Drawing.Point(141, 12);
+            this.comboBoxPastry.Name = "comboBoxPastry";
+            this.comboBoxPastry.Size = new System.Drawing.Size(121, 23);
+            this.comboBoxPastry.TabIndex = 0;
+            // 
+            // label1
+            // 
+            this.label1.AutoSize = true;
+            this.label1.Location = new System.Drawing.Point(12, 15);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(123, 15);
+            this.label1.TabIndex = 1;
+            this.label1.Text = "Изделие на продажу:";
+            // 
+            // label2
+            // 
+            this.label2.AutoSize = true;
+            this.label2.Location = new System.Drawing.Point(60, 46);
+            this.label2.Name = "label2";
+            this.label2.Size = new System.Drawing.Size(75, 15);
+            this.label2.TabIndex = 2;
+            this.label2.Text = "Количество:";
+            // 
+            // numericUpDownCount
+            // 
+            this.numericUpDownCount.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.numericUpDownCount.Location = new System.Drawing.Point(142, 46);
+            this.numericUpDownCount.Maximum = new decimal(new int[] {
+            10000000,
+            0,
+            0,
+            0});
+            this.numericUpDownCount.Name = "numericUpDownCount";
+            this.numericUpDownCount.RightToLeft = System.Windows.Forms.RightToLeft.No;
+            this.numericUpDownCount.Size = new System.Drawing.Size(120, 23);
+            this.numericUpDownCount.TabIndex = 3;
+            // 
+            // buttonSell
+            // 
+            this.buttonSell.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+            this.buttonSell.Location = new System.Drawing.Point(12, 90);
+            this.buttonSell.Name = "buttonSell";
+            this.buttonSell.Size = new System.Drawing.Size(123, 23);
+            this.buttonSell.TabIndex = 4;
+            this.buttonSell.Text = "Продать";
+            this.buttonSell.UseVisualStyleBackColor = true;
+            this.buttonSell.Click += new System.EventHandler(this.ButtonSell_Click);
+            // 
+            // buttonCancel
+            // 
+            this.buttonCancel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+            this.buttonCancel.Location = new System.Drawing.Point(142, 90);
+            this.buttonCancel.Name = "buttonCancel";
+            this.buttonCancel.Size = new System.Drawing.Size(123, 23);
+            this.buttonCancel.TabIndex = 5;
+            this.buttonCancel.Text = "Отмена";
+            this.buttonCancel.UseVisualStyleBackColor = true;
+            this.buttonCancel.Click += new System.EventHandler(this.ButtonCancel_Click);
+            // 
+            // FormSellPastry
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(277, 122);
+            this.Controls.Add(this.buttonCancel);
+            this.Controls.Add(this.buttonSell);
+            this.Controls.Add(this.numericUpDownCount);
+            this.Controls.Add(this.label2);
+            this.Controls.Add(this.label1);
+            this.Controls.Add(this.comboBoxPastry);
+            this.Name = "FormSellPastry";
+            this.Text = "Продажа изделия";
+            ((System.ComponentModel.ISupportInitialize)(this.numericUpDownCount)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private ComboBox comboBoxPastry;
+        private Label label1;
+        private Label label2;
+        private NumericUpDown numericUpDownCount;
+        private Button buttonSell;
+        private Button buttonCancel;
+    }
+}

Confectionery/FormSellPastry.cs

@@ -0,0 +1,67 @@
+using ConfectioneryContracts.BusinessLogicsContracts;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace ConfectioneryView
+{
+    public partial class FormSellPastry : Form
+    {
+        private readonly IShopLogic _shopLogic; 
+        private readonly IPastryLogic _pastryLogic; 
+
+        public FormSellPastry(IPastryLogic logic, IShopLogic shopLogic)
+        {
+            InitializeComponent();
+            _pastryLogic = logic;
+            _shopLogic = shopLogic;
+            var list = logic.ReadList(null);
+            if (list != null)
+            {
+                comboBoxPastry.DisplayMember = "PastryName";
+                comboBoxPastry.ValueMember = "Id";
+                comboBoxPastry.DataSource = list;
+                comboBoxPastry.SelectedItem = null;
+            }
+        }
+
+        private void ButtonSell_Click(object sender, EventArgs e)
+        {
+            if (comboBoxPastry.SelectedValue == null)
+            {
+                MessageBox.Show("Выберите изделие", "Ошибка",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (numericUpDownCount.Value <= 0)
+            {
+                MessageBox.Show("Количество должно быть больше нуля", "Ошибка",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            var count = (int)numericUpDownCount.Value;
+            var pastry = _pastryLogic.ReadElement(new() { Id = (int)comboBoxPastry.SelectedValue });
+            if (pastry == null || !_shopLogic.SellPastries(pastry, count))
+            {
+                MessageBox.Show("Не удалось продать изделия. Информацию смотрите в логах", "Ошибка",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            DialogResult = DialogResult.OK;
+            Close();
+        }
+
+        private void ButtonCancel_Click(object sender, EventArgs e)
+        {
+            DialogResult = DialogResult.Cancel;
+            Close();
+        }
+    }
+}

Confectionery/FormSellPastry.resx

@@ -0,0 +1,60 @@
+<root>
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

Confectionery/FormShop.Designer.cs

@@ -40,7 +40,10 @@
             this.textBoxDateOpening = new System.Windows.Forms.TextBox();
             this.buttonCancel = new System.Windows.Forms.Button();
             this.buttonSave = new System.Windows.Forms.Button();
+            this.label4 = new System.Windows.Forms.Label();
+            this.numericUpDownMaxPastry = new System.Windows.Forms.NumericUpDown();
             ((System.ComponentModel.ISupportInitialize)(this.dataGridView)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.numericUpDownMaxPastry)).BeginInit();
             this.SuspendLayout();
             // 
             // label1
@@ -74,7 +77,7 @@
             this.dataGridView.Location = new System.Drawing.Point(12, 64);
             this.dataGridView.Name = "dataGridView";
             this.dataGridView.RowTemplate.Height = 25;
-            this.dataGridView.Size = new System.Drawing.Size(583, 213);
+            this.dataGridView.Size = new System.Drawing.Size(640, 213);
             this.dataGridView.TabIndex = 2;
             // 
             // PastryName
@@ -105,7 +108,7 @@
             // label3
             // 
             this.label3.AutoSize = true;
-            this.label3.Location = new System.Drawing.Point(386, 9);
+            this.label3.Location = new System.Drawing.Point(366, 9);
             this.label3.Name = "label3";
             this.label3.Size = new System.Drawing.Size(100, 15);
             this.label3.TabIndex = 4;
@@ -115,20 +118,20 @@
             // 
             this.textBoxAddress.Location = new System.Drawing.Point(159, 27);
             this.textBoxAddress.Name = "textBoxAddress";
-            this.textBoxAddress.Size = new System.Drawing.Size(221, 23);
+            this.textBoxAddress.Size = new System.Drawing.Size(201, 23);
             this.textBoxAddress.TabIndex = 5;
             // 
             // textBoxDateOpening
             // 
-            this.textBoxDateOpening.Location = new System.Drawing.Point(386, 27);
+            this.textBoxDateOpening.Location = new System.Drawing.Point(366, 27);
             this.textBoxDateOpening.Name = "textBoxDateOpening";
-            this.textBoxDateOpening.Size = new System.Drawing.Size(209, 23);
+            this.textBoxDateOpening.Size = new System.Drawing.Size(160, 23);
             this.textBoxDateOpening.TabIndex = 6;
             // 
             // buttonCancel
             // 
             this.buttonCancel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
-            this.buttonCancel.Location = new System.Drawing.Point(492, 283);
+            this.buttonCancel.Location = new System.Drawing.Point(549, 283);
             this.buttonCancel.Name = "buttonCancel";
             this.buttonCancel.Size = new System.Drawing.Size(103, 23);
             this.buttonCancel.TabIndex = 7;
@@ -139,7 +142,7 @@
             // buttonSave
             // 
             this.buttonSave.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
-            this.buttonSave.Location = new System.Drawing.Point(366, 284);
+            this.buttonSave.Location = new System.Drawing.Point(423, 284);
             this.buttonSave.Name = "buttonSave";
             this.buttonSave.Size = new System.Drawing.Size(120, 22);
             this.buttonSave.TabIndex = 8;
@@ -147,11 +150,34 @@
             this.buttonSave.UseVisualStyleBackColor = true;
             this.buttonSave.Click += new System.EventHandler(this.ButtonSave_Click);
             // 
+            // label4
+            // 
+            this.label4.AutoSize = true;
+            this.label4.Location = new System.Drawing.Point(530, 9);
+            this.label4.Name = "label4";
+            this.label4.Size = new System.Drawing.Size(118, 15);
+            this.label4.TabIndex = 9;
+            this.label4.Text = "Максимум изделий:";
+            // 
+            // numericUpDownMaxPastry
+            // 
+            this.numericUpDownMaxPastry.Location = new System.Drawing.Point(532, 27);
+            this.numericUpDownMaxPastry.Maximum = new decimal(new int[] {
+            10000000,
+            0,
+            0,
+            0});
+            this.numericUpDownMaxPastry.Name = "numericUpDownMaxPastry";
+            this.numericUpDownMaxPastry.Size = new System.Drawing.Size(120, 23);
+            this.numericUpDownMaxPastry.TabIndex = 10;
+            // 
             // FormShop
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(607, 317);
+            this.ClientSize = new System.Drawing.Size(664, 317);
+            this.Controls.Add(this.numericUpDownMaxPastry);
+            this.Controls.Add(this.label4);
             this.Controls.Add(this.buttonSave);
             this.Controls.Add(this.buttonCancel);
             this.Controls.Add(this.textBoxDateOpening);
@@ -165,6 +191,7 @@
             this.Text = "Просмотр изделий магазина";
             this.Load += new System.EventHandler(this.FormShop_Load);
             ((System.ComponentModel.ISupportInitialize)(this.dataGridView)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.numericUpDownMaxPastry)).EndInit();
             this.ResumeLayout(false);
             this.PerformLayout();
 
@@ -184,5 +211,7 @@
         private DataGridViewTextBoxColumn PastryName;
         private DataGridViewTextBoxColumn Price;
         private DataGridViewTextBoxColumn Count;
+        private Label label4;
+        private NumericUpDown numericUpDownMaxPastry;
     }
 }

Confectionery/FormShop.cs

@@ -66,7 +66,8 @@ namespace ConfectioneryView
             {
                 var model = GetShop(extendDate ? Id : Convert.ToInt32(comboBoxShop.SelectedValue));
                 if (model != null)
-                { 
+                {
+                    numericUpDownMaxPastry.Value = model.MaxCountPastries;
                     comboBoxShop.Text = model.Name;
                     textBoxAddress.Text = model.Address;
                     textBoxDateOpening.Text = Convert.ToString(model.DateOpening);
@@ -113,7 +114,8 @@ namespace ConfectioneryView
                 {
                     Name = comboBoxShop.Text,
                     Address = textBoxAddress.Text,
-                    DateOpening = dateTime
+                    DateOpening = dateTime,
+                    MaxCountPastries = (int)numericUpDownMaxPastry.Value,
                 };
                 var vmodel = GetShop(Id);
                 bool operationResult = false;

Confectionery/FormShop.resx

@@ -66,4 +66,13 @@
   <metadata name="Count.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>True</value>
   </metadata>
+  <metadata name="PastryName.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="Price.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="Count.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
 </root>

Confectionery/Program.cs

@@ -1,13 +1,12 @@
-using ConfectioneryListImplement.Implements;
-using ConfectioneryBusinessLogic;
+using ConfectioneryFileImplement.Implements;
 using ConfectioneryBusinessLogic.BusinessLogics;
 using ConfectioneryContracts.BusinessLogicsContracts;
 using ConfectioneryContracts.StoragesContract;
-using ConfectioneryListImplement;
+using ConfectioneryFileImplement;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;
-
+using ConfectioneryBusinessLogic;
 
 namespace ConfectioneryView
 {
@@ -54,6 +53,7 @@ namespace ConfectioneryView
             services.AddTransient<FormAddPastryInShop>();
             services.AddTransient<FormViewShops>();
             services.AddTransient<FormShop>();
+            services.AddTransient<FormSellPastry>();
         }
     }
 }

ConfectioneryContracts/BindingModels/ShopBindingModel.cs

@@ -9,6 +9,8 @@ namespace ConfectioneryContracts.BindingModels
 
         public string Address { get; set; } = string.Empty;
 
+        public int MaxCountPastries { get; set; }
+
         public DateTime DateOpening { get; set; } = DateTime.Now;
 
         public Dictionary<int, (IPastryModel, int)> Pastries

ConfectioneryContracts/BusinessLogicsContracts/IShopLogic.cs

@@ -13,5 +13,8 @@ namespace ConfectioneryContracts.BusinessLogicsContracts
         bool Update(ShopBindingModel model);
         bool Delete(ShopBindingModel model);
         bool AddPastry(ShopSearchModel model, IPastryModel pastry, int count);
+        int GetFreePlacesWithPastriesInShops(int countPastries);
+        bool AddPastriesInShops(IPastryModel pastry, int count);
+        public bool SellPastries(IPastryModel pastry, int needCount);
     }
 }

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);
     }
 }

ConfectioneryContracts/ViewModels/ShopViewModel.cs

@@ -12,6 +12,9 @@ namespace ConfectioneryContracts.ViewModels
         [DisplayName("Адрес магазина")]
         public string Address { get; set; } = string.Empty;
 
+        [DisplayName("Максимальное количество изделий в магазине")]
+        public int MaxCountPastries { get; set; }
+
         [DisplayName("Время открытия")]
         public DateTime DateOpening { get; set; } = DateTime.Now;
 
@@ -22,5 +25,6 @@ namespace ConfectioneryContracts.ViewModels
         } = new();
 
         public int Id { get; set; }
+
     }
 }

ConfectioneryDataModels/IShopModel.cs

@@ -6,6 +6,7 @@ namespace ConfectioneryDataModels
     {
         string Name { get; }
         string Address { get; }
+        int MaxCountPastries { get; }
         DateTime DateOpening { get; }
         Dictionary<int, (IPastryModel, int)> Pastries { get; }
     }