FoodOrders/AbstractFoodOrdersListImplement/AbstractFoodOrdersListImplement.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AbstractFoodOrdersContracts\AbstractFoodOrdersContracts.csproj" />
+    <ProjectReference Include="..\AbstractFoodOrdersDataModels\AbstractFoodOrdersDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

FoodOrders/AbstractFoodOrdersListImplement/DataListSingleton.cs

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+using AbstractFoodOrdersListImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement
+{
+    public class DataListSingleton
+    {
+        private static DataListSingleton? _instance;
+        public List<Component> Components { get; set; }
+        public List<Order> Orders { get; set; }
+        public List<Dish> Products { get; set; }
+        private DataListSingleton()
+        {
+            Components = new List<Component>();
+            Orders = new List<Order>();
+            Products = new List<Product>();
+        }
+        public static DataListSingleton GetInstance()
+        {
+            if (_instance == null)
+            {
+                _instance = new DataListSingleton();
+            }
+            return _instance;
+        }
+    }
+}

FoodOrders/AbstractFoodOrdersListImplement/Implements/ComponentStorage.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement.Implements
+{
+    internal class ComponentStorage
+    {
+    }
+}

FoodOrders/AbstractFoodOrdersListImplement/Implements/DishStorage.cs

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+using AbstractFoodOrdersContracts.BindingModels;
+using AbstractFoodOrdersContracts.SearchModels;
+using AbstractFoodOrdersContracts.StoragesContracts;
+using AbstractFoodOrdersContracts.ViewModels;
+using AbstractFoodOrdersListImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement.Implements
+{
+    public class DishStorage : IDishStorage
+    {
+        private readonly DataListSingleton _source;
+        public DishStorage()
+        {
+            _source = DataListSingleton.GetInstance();
+        }
+        public List<DishViewModel> GetFullList()
+        {
+            var result = new List<DishViewModel>();
+            foreach (var dish in _source.Dishes)
+            {
+                result.Add(dish.GetViewModel);
+            }
+            return result;
+        }
+        public List<DishViewModel> GetFilteredList(DishSearchModel model)
+        {
+            var result = new List<DishViewModel>();
+            if (string.IsNullOrEmpty(model.DishName))
+            {
+                return result;
+            }
+            foreach (var dish in _source.Dishes)
+            {
+                if (dish.DishName.Contains(model.DishName))
+                {
+                    result.Add(dish.GetViewModel);
+                }
+            }
+            return result;
+        }
+        public DishViewModel? GetElement(DishSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.DishName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            foreach (var dish in _source.Dishes)
+            {
+                if ((!string.IsNullOrEmpty(model.DishName) && dish.DishName == model.DishName) ||
+                    (model.Id.HasValue && dish.Id == model.Id))
+                {
+                    return dish.GetViewModel;
+                }
+            }
+            return null;
+        }
+        public DishViewModel? Insert(DishBindingModel model)
+        {
+            model.Id = 1;
+            foreach (var dish in _source.Dishes)
+            {
+                if (model.Id <= dish.Id)
+                {
+                    model.Id = dish.Id + 1;
+                }
+            }
+            var newDish = Dish.Create(model);
+            if (newDish == null)
+            {
+                return null;
+            }
+            _source.Dishes.Add(newDish);
+            return newDish.GetViewModel;
+        }
+        public DishViewModel? Update(DishBindingModel model)
+        {
+            foreach (var dish in _source.Dishes)
+            {
+                if (dish.Id == model.Id)
+                {
+                    dish.Update(model);
+                    return dish.GetViewModel;
+                }
+            }
+            return null;
+        }
+        public DishViewModel? Delete(DishBindingModel model)
+        {
+            for (int i = 0; i < _source.Dishes.Count; ++i)
+            {
+                if (_source.Dishes[i].Id == model.Id)
+                {
+                    var element = _source.Dishes[i];
+                    _source.Dishes.RemoveAt(i);
+                    return element.GetViewModel;
+                }
+            }
+            return null;
+        }
+    }
+}

FoodOrders/AbstractFoodOrdersListImplement/Implements/OrderStorage.cs

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+using AbstractFoodOrdersContracts.BindingModels;
+using AbstractFoodOrdersContracts.SearchModels;
+using AbstractFoodOrdersContracts.StoragesContracts;
+using AbstractFoodOrdersContracts.ViewModels;
+using AbstractFoodOrdersListImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        private readonly DataListSingleton _source;
+        public OrderStorage()
+        {
+            _source = DataListSingleton.GetInstance();
+        }
+        public List<OrderViewModel> GetFullList()
+        {
+            var result = new List<OrderViewModel>();
+            foreach (var order in _source.Orders)
+            {
+                result.Add(AttachReinforcedName(order.GetViewModel));
+            }
+            return result;
+        }
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            //А, собственно, этт метод не имеет ценности, так как повторяет функционал следующего
+            var result = new List<OrderViewModel>();
+            if (model == null || !model.Id.HasValue)
+            {
+                return result;
+            }
+            foreach (var order in _source.Orders)
+            {
+                if (order.Id == model.Id)
+                {
+                    result.Add(AttachReinforcedName(order.GetViewModel));
+                }
+            }
+            return result;
+
+        }
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            foreach (var order in _source.Orders)
+            {
+                if (model.Id.HasValue && order.Id == model.Id)
+                {
+                    return AttachReinforcedName(order.GetViewModel);
+                }
+            }
+            return null;
+
+        }
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            model.Id = 1;
+            foreach (var order in _source.Orders)
+            {
+                if (model.Id <= order.Id)
+                {
+                    model.Id = order.Id + 1;
+                }
+            }
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            _source.Orders.Add(newOrder);
+            return AttachReinforcedName(newOrder.GetViewModel);
+        }
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            foreach (var order in _source.Orders)
+            {
+                if (order.Id == model.Id)
+                {
+                    order.Update(model);
+                    return AttachReinforcedName(order.GetViewModel);
+                }
+            }
+            return null;
+        }
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            for (int i = 0; i < _source.Orders.Count; ++i)
+            {
+                if (_source.Orders[i].Id == model.Id)
+                {
+                    var element = _source.Orders[i];
+                    _source.Orders.RemoveAt(i);
+                    return AttachReinforcedName(element.GetViewModel);
+                }
+            }
+            return null;
+        }
+        private OrderViewModel AttachReinforcedName(OrderViewModel model)
+        {
+            //Из всех мест, это выглядит наиболее подходящим, для данной манипуляции.
+            //При расположении ниже нарушится целостность данных
+            //При расположении выше будет нарушен принцип разделения уровней
+            foreach (var reinforced in _source.Dishes)
+            {
+                if (reinforced.Id == model.DishId)
+                {
+                    model.DishName = reinforced.DishName;
+                    return model;
+                }
+            }
+            return model;
+        }
+    }
+}

FoodOrders/AbstractFoodOrdersListImplement/Models/Component.cs

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+using AbstractFoodOrdersContracts.BindingModels;
+using AbstractFoodOrdersContracts.ViewModels;
+using AbstractFoodOrdersDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement.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 void Update(ComponentBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+    }
+
+}

FoodOrders/AbstractFoodOrdersListImplement/Models/Dish.cs

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+using AbstractFoodOrdersContracts.BindingModels;
+using AbstractFoodOrdersContracts.ViewModels;
+using AbstractFoodOrdersDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement.Models
+{
+    public class Dish : IDishModel
+    {
+        public int Id { get; private set; }
+        public string DishName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, (IComponentModel, int)> DishComponents
+        {
+            get;
+            private set;
+        } = new Dictionary<int, (IComponentModel, int)>();
+        public static Dish? Create(ProductBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Dish(){ Id = model.Id, DishName = model.DishName, Price = model.Price, DishComponents = model.DishComponents };
+        }
+        public void Update(ProductBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            DishName = model.DishName;
+            Price = model.Price;
+            DishComponents = model.DishComponents;
+        }
+        public DishViewModel GetViewModel => new()
+        {
+            Id = Id,
+            DishName = DishName,
+            Price = Price,
+            DishComponents = DishComponents
+        };
+    }
+
+}

FoodOrders/AbstractFoodOrdersListImplement/Models/Order.cs

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+using AbstractFoodOrdersContracts.BindingModels;
+using AbstractFoodOrdersContracts.ViewModels;
+using AbstractFoodOrdersDataModels.Enums;
+using AbstractFoodOrdersDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractFoodOrdersListImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+        public int DishId { get; private set; }
+        public int Count { get; private set; }
+        public double Sum { get; private set; }
+        public OrderStatus Status { get; private set; } = OrderStatus.Неизвестен;
+        public DateTime DateCreate { get; private set; } = DateTime.Now;
+        public DateTime? DateImplement { get; private set; }
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                DishId = model.DishId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement,
+            };
+        }
+        public void Update(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            DishId = model.DishId;
+            Count = model.Count;
+            Sum = model.Sum;
+            Status = model.Status;
+            DateCreate = model.DateCreate;
+            DateImplement = model.DateImplement;
+        }
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            DishId = DishId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+        };
+    }
+}