BusinessLogic/BusinessLogic/ProductLogic.cs

@@ -0,0 +1,125 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BusinessLogic.BusinessLogic
+{
+    public class ProductLogic : IProductLogic
+    {
+        private readonly IProductStorage _productStorage;
+        private readonly ILogger _logger;
+        public ProductLogic(IProductStorage productStorage, ILogger<ProductLogic> logger)
+        {
+            _productStorage = productStorage;
+            _logger = logger;
+        }
+        public bool Create(ProductBindingModel model)
+        {
+            CheckModel(model);
+            if (_productStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(ProductBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_productStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public ProductViewModel? ReadElement(ProductSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Name:{Name}.Id:{ Id}", model.Name, model.Id);
+            var element = _productStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public List<ProductViewModel>? ReadList(ProductSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Name:{Name}.Id:{ Id}", model?.Name, model?.Id);
+            var list = model == null ? _productStorage.GetFullList() : _productStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Update(ProductBindingModel model)
+        {
+            CheckModel(model);
+            if (_productStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(ProductBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет названия продукта", nameof(model.Name));
+            }
+            if (model.Price < 0)
+            {
+                throw new Exception("Цена продукта не может быть ниже нуля");
+            }
+            if (model.Amount < 0)
+            {
+                throw new Exception("Кол-во продуктов не может быть ниже нуля");
+            }
+            if (model.Rate < 0.0 || model.Rate > 5.0)
+            {
+                throw new Exception("Рейтинг продукта должен быть в пределах от 0.0 до 5.0");
+            }
+            _logger.LogInformation("Product. ProductName:{Name}.Price:{ Price}. Id: { Id}", model.Name, model.Price, model.Id);
+            var element = _productStorage.GetElement(new ProductSearchModel
+            {
+                Name = model.Name
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Продукт с таким названием уже есть");
+            }
+        }
+    }
+}

BusinessLogic/BusinessLogic/SupplierLogic.cs

@@ -0,0 +1,114 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BusinessLogic.BusinessLogic
+{
+    public class SupplierLogic : ISupplierLogic
+    {
+        private readonly ISupplierStorage _supplierStorage;
+        private readonly ILogger _logger;
+        public SupplierLogic(ISupplierStorage supplierStorage, ILogger<SupplierLogic> logger)
+        {
+            _supplierStorage = supplierStorage;
+            _logger = logger;
+        }
+        public bool Create(SupplierBindingModel model)
+        {
+            CheckModel(model);
+            if (_supplierStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(SupplierBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_supplierStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public SupplierViewModel? ReadElement(SupplierSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Name:{Name}.Id:{ Id}", model.Name, model.Id);
+            var element = _supplierStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public List<SupplierViewModel>? ReadList(SupplierSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Name:{Name}.Id:{ Id}", model?.Name, model?.Id);
+            var list = model == null ? _supplierStorage.GetFullList() : _supplierStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Update(SupplierBindingModel model)
+        {
+            CheckModel(model);
+            if (_supplierStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(SupplierBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет названия поставщика", nameof(model.Name));
+            }
+            if (model.Deals < 0)
+            {
+                throw new Exception("Кол-во сделок не может быть меньше нуля");
+            }
+            foreach(var item in model.AvailibleProducts.Values)
+            {
+                if (item.Item2 < 0)
+                {
+                    throw new Exception("Кол-во доступных продуктов не должно быть отрицательным");
+                }
+            }
+        }
+    }
+}

BusinessLogic/BusinessLogic/SupplyLogic.cs

@@ -0,0 +1,105 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BusinessLogic.BusinessLogic
+{
+    public class SupplyLogic : ISupplyLogic
+    {
+        private readonly ISupplyStorage _supplyStorage;
+        private readonly ILogger _logger;
+        public SupplyLogic(ISupplyStorage supplyStorage, ILogger<SupplyLogic> logger)
+        {
+            _supplyStorage = supplyStorage;
+            _logger = logger;
+        }
+
+        public bool Create(SupplyBindingModel model)
+        {
+            CheckModel(model);
+            if (_supplyStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(SupplyBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_supplyStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public SupplyViewModel? ReadElement(SupplySearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Name:{Name}.Id:{ Id}", model.Name, model.Id);
+            var element = _supplyStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public List<SupplyViewModel>? ReadList(SupplySearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Name:{Name}.Id:{ Id}", model?.Name, model?.Id);
+            var list = model == null ? _supplyStorage.GetFullList() : _supplyStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public bool Update(SupplyBindingModel model)
+        {
+            CheckModel(model);
+            if (_supplyStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(SupplyBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет названия поставки", nameof(model.Name));
+            }
+        }
+    }
+}

Contracts/BindingModels/MediaFileBindingModel.cs

@@ -0,0 +1,17 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+	public class MediaFileBindingModel : IMediaFile
+	{
+		public Guid Id { get; set; }
+		public Guid ProductId { get; set; }
+		public string Name { get; set; } = string.Empty;
+		public string Location { get; set; } = string.Empty;
+	}
+}

Contracts/BindingModels/ProductBindingModel.cs

@@ -0,0 +1,19 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+	public class ProductBindingModel : IProduct
+	{
+		public Guid Id { get; set; }
+		public string Name { get; set; } = string.Empty;
+		public double Price { get; set; }
+		public int Amount { get; set; }
+		public bool IsBeingSold { get; set; }
+		public double Rate {  get; set; }
+	}
+}

Contracts/BindingModels/PurchaseBindingModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+	public class PurchaseBindingModel
+	{
+		public Guid Id { get; set; }
+		public DateTime DatePurchase { get; set; }
+	}
+}

Contracts/BindingModels/SellBindingModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+	public class SellBindingModel
+	{
+		public Guid Id { get; set; }
+		public DateTime DateSell { get; set; }
+	}
+}

Contracts/BindingModels/SupplierBindingModel.cs

@@ -0,0 +1,17 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+    public class SupplierBindingModel : ISupplier
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public Dictionary<Guid, (IProduct, int)> AvailibleProducts { get; set; } = new();
+        public int Deals { get; set; } = 0;
+    }
+}

Contracts/BindingModels/SupplyBindingModel.cs

@@ -0,0 +1,21 @@
+using DataModels.Enums;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+    public class SupplyBindingModel : ISupply
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public Guid SupplierId { get; set; }
+        public DateTime Date { get; set; }
+        public double Price { get; set; }
+        public SupplyStatus Status { get; set; }
+        public Dictionary<Guid, (IProduct, int)> SupplyProducts { get; set; } = new();
+    }
+}

Contracts/BindingModels/SupplyDocBindingModel.cs

@@ -0,0 +1,17 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BindingModels
+{
+    public class SupplyDocBindingModel : ISupplyDoc
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public Guid SupplyId {  get; set; } 
+
+    }
+}

Contracts/BusinessLogicContracts/IEmployeeProductLogic.cs

@@ -0,0 +1,24 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+	public  interface IEmployeeProductLogic
+	{
+		EmployeeProductViewModel Create(ProductBindingModel model);
+
+		EmployeeProductViewModel Update(ProductBindingModel model);
+
+		EmployeeProductViewModel ReadElement(ProductSearchModel model);
+
+		IEnumerable<EmployeeProductViewModel> ReadElements(ProductSearchModel? model);
+
+		EmployeeProductViewModel Delete(ProductSearchModel model);
+	}
+}

Contracts/BusinessLogicContracts/IProductLogic.cs

@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface IProductLogic
+    {
+        bool Create(ProductBindingModel model);
+        bool Update(ProductBindingModel model);
+        bool Delete(ProductBindingModel model);
+        List<ProductViewModel>? ReadList(ProductSearchModel? model);
+        ProductViewModel? ReadElement(ProductSearchModel model);
+    }
+}

Contracts/BusinessLogicContracts/IPurchaseLogic.cs

@@ -0,0 +1,24 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+	public interface IPurchaseLogic
+	{
+		PurchaseViewModel Create(PurchaseBindingModel model);
+
+		PurchaseViewModel Update(PurchaseBindingModel model);
+
+		PurchaseViewModel ReadElement(PurchaseSearchModel model);
+
+		IEnumerable<PurchaseViewModel> ReadElements(PurchaseSearchModel? model);
+
+		PurchaseViewModel Delete(PurchaseSearchModel model);
+	}
+}

Contracts/BusinessLogicContracts/ISellLogic.cs

@@ -0,0 +1,24 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+	public interface ISellLogic
+	{
+		SellViewModel Create(SellBindingModel model);
+
+		SellViewModel Update(SellBindingModel model);
+
+		SellViewModel ReadElement(SellSearchModel model);
+
+		IEnumerable<SellViewModel> ReadElements(SellSearchModel? model);
+
+		SellViewModel Delete(SellSearchModel model);
+	}
+}

Contracts/BusinessLogicContracts/ISupplierLogic.cs

@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface ISupplierLogic
+    {
+        List<SupplierViewModel>? ReadList(SupplierSearchModel? model);
+        SupplierViewModel? ReadElement(SupplierSearchModel model);
+        bool Create(SupplierBindingModel model);
+        bool Update(SupplierBindingModel model);
+        bool Delete(SupplierBindingModel model);
+    }
+}

Contracts/BusinessLogicContracts/ISupplyDocLogic.cs

@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface ISupplyDocLogic
+    {
+        List<SupplyDocViewModel>? ReadList(SupplyDocSearchModel? model);
+        SupplyDocViewModel? ReadElement(SupplyDocSearchModel model);
+        bool Create(SupplyDocBindingModel model);
+        bool Update(SupplyDocBindingModel model);
+        bool Delete(SupplyDocBindingModel model);
+    }
+}

Contracts/BusinessLogicContracts/ISupplyLogic.cs

@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface ISupplyLogic
+    {
+        List<SupplyViewModel>? ReadList(SupplySearchModel? model);
+        SupplyViewModel? ReadElement(SupplySearchModel model);
+        bool Create(SupplyBindingModel model);
+        bool Update(SupplyBindingModel model);
+        bool Delete(SupplyBindingModel model);
+    }
+}

Contracts/BusinessLogicContracts/IUserProductLogic.cs

@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+	public interface IUserProductLogic
+	{
+
+		UserProductViewModel ReadElement(ProductSearchModel model);
+
+		IEnumerable<UserProductViewModel> ReadElements(ProductSearchModel? model);
+
+		UserProductViewModel Delete(ProductSearchModel model);
+	}
+}

Contracts/Contracts.csproj

@@ -6,4 +6,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\DataModels\DataModels.csproj" />
+  </ItemGroup>
+
 </Project>

Contracts/SearchModels/MediaFileSearchModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+    public class MediaFileSearchModel
+    {
+        public Guid? Id { get; set; }
+        public Guid? ProductId { get; set; }
+    }
+}

Contracts/SearchModels/ProductSearchModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+	public class ProductSearchModel
+	{
+		public Guid? Id { get; set; }
+		public string? Name { get; set; }
+		public double? Price { get; set; }
+		public double? Rate { get; set; }
+		public int? Amount { get; set; }
+		public bool? IsBeingSold { get; set; }
+	}
+}

Contracts/SearchModels/PurchaseSearchModel.cs

@@ -0,0 +1,20 @@
+using DataModels.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+namespace Contracts.SearchModels
+{
+	public class PurchaseSearchModel
+	{
+		public Guid? Id { get; set; }
+		public DateTime? DateFrom { get; set; }
+		public DateTime? DateTo { get; set; }
+		public double? PriceFrom { get; set; }
+		public double? PriceTo { get; set; }
+		public PurchaseStatus? Status { get; set; }
+	}
+}

Contracts/SearchModels/SellSearchModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+	public class SellSearchModel
+	{
+		public Guid? Id { get; set; }
+		public DateTime? DateFrom { get; set; }
+		public DateTime? DateTo { get; set; }
+		public Guid? SupplyDocId { get; set; }
+	}
+}

Contracts/SearchModels/SupplierSearchModel.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+    public class SupplierSearchModel
+    {
+        public Guid? Id { get; set; }
+        public string? Name { get; set; }
+        //public List<ProductSearchModel>? AvailibleProducts { get; set; }
+        public int? Deals { get; set; }
+    }
+}

Contracts/SearchModels/SupplyDocSearchModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+    public class SupplyDocSearchModel
+    {
+        public Guid? Id { get; set; }
+        public string? Name { get; set; }
+        public Guid? SupplyId { get; set; }
+    }
+}

Contracts/SearchModels/SupplySearchModel.cs

@@ -0,0 +1,18 @@
+using DataModels.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.SearchModels
+{
+    public class SupplySearchModel
+    {
+        public Guid? Id {  get; set; }
+        public string Name { get; set; } = string.Empty;
+        public SupplyStatus? Status { get; set; }
+        public DateTime? DateStart { get; set; }
+        public DateTime? DateEnd { get; set; }
+    }
+}

Contracts/StorageContracts/IProductStorage.cs

@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+	public interface IProductStorage
+	{
+        List<ProductViewModel> GetFullList();
+        List<ProductViewModel> GetFilteredList(ProductSearchModel model);
+        ProductViewModel? GetElement(ProductSearchModel model);
+        ProductViewModel? Insert(ProductBindingModel model);
+        ProductViewModel? Update(ProductBindingModel model);
+        ProductViewModel? Delete(ProductBindingModel model);
+    }
+}

Contracts/StorageContracts/IPurchaseStorage.cs

@@ -0,0 +1,23 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+	public interface IPurchaseStorage
+	{
+		PurchaseBindingModel? Insert(PurchaseBindingModel model);
+
+		IEnumerable<PurchaseBindingModel> GetList(PurchaseSearchModel? model);
+
+		PurchaseBindingModel? GetElement(PurchaseSearchModel model);
+
+		PurchaseBindingModel? Update(PurchaseBindingModel model);
+
+		PurchaseBindingModel? Delete(PurchaseSearchModel model);
+	}
+}

Contracts/StorageContracts/ISellStorage.cs

@@ -0,0 +1,23 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+	public interface ISellStorage
+	{
+		SellBindingModel? Insert(SellBindingModel model);
+
+		IEnumerable<SellBindingModel> GetList(SellSearchModel? model);
+
+		SellBindingModel? GetElement(SellSearchModel model);
+
+		SellBindingModel? Update(SellBindingModel model);
+
+		SellBindingModel? Delete(SellSearchModel model);
+	}
+}

Contracts/StorageContracts/ISupplierStorage.cs

@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ISupplierStorage
+    {
+        List<SupplierViewModel> GetFullList();
+        List<SupplierViewModel> GetFilteredList(SupplierSearchModel model);
+        SupplierViewModel? GetElement(SupplierSearchModel model);
+        SupplierViewModel? Insert(SupplierBindingModel model);
+        SupplierViewModel? Update(SupplierBindingModel model);
+        SupplierViewModel? Delete(SupplierBindingModel model);
+    }
+}

Contracts/StorageContracts/ISupplyDocStorage.cs

@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ISupplyDocStorage
+    {
+        List<SupplyDocViewModel> GetFullList();
+        List<SupplyDocViewModel> GetFilteredList(SupplyDocSearchModel model);
+        SupplyDocViewModel? GetElement(SupplyDocSearchModel model);
+        SupplyDocViewModel? Insert(SupplyDocBindingModel model);
+        SupplyDocViewModel? Update(SupplyDocBindingModel model);
+        SupplyDocViewModel? Delete(SupplyDocBindingModel model);
+    }
+}

Contracts/StorageContracts/ISupplyStorage.cs

@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ISupplyStorage
+    {
+        List<SupplyViewModel> GetFullList();
+        List<SupplyViewModel> GetFilteredList(SupplySearchModel model);
+        SupplyViewModel? GetElement(SupplySearchModel model);
+        SupplyViewModel? Insert(SupplyBindingModel model);
+        SupplyViewModel? Update(SupplyBindingModel model);
+        SupplyViewModel? Delete(SupplyBindingModel model);
+    }
+}

Contracts/ViewModels/EmployeeProductViewModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+	public class EmployeeProductViewModel
+	{
+		public Guid Guid { get; set; }
+		public string Name { get; set; } = string.Empty;
+		public double Price { get; set; }
+	}
+}

Contracts/ViewModels/MediaFileViewModel.cs

@@ -0,0 +1,29 @@
+using Contracts.BindingModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class MediaFileViewModel
+    {
+        public Guid Id { get; set; }
+        public string Location { get; set; } = string.Empty;
+        public string Name { get; set; } = string.Empty;
+        public Guid ProductId { get; set; }
+		public MediaFileBindingModel GetBindingModel()
+		{
+			return new MediaFileBindingModel
+			{
+				Id = Id,
+				Name = Name,
+				Location = Location,
+				ProductId = ProductId
+			};
+		}
+
+	}
+}

Contracts/ViewModels/ProductViewModel.cs

@@ -0,0 +1,20 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class ProductViewModel
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public double Price {  get; set; }
+        public double Rating { get; set; }
+        public bool IsBeingSold { get; set; }
+        public int Amount { get; set; }
+        public List<MediaFileViewModel> MediaFiles { get; set; } = new();
+    }
+}

Contracts/ViewModels/PurchaseViewModel.cs

@@ -0,0 +1,19 @@
+using DataModels.Enums;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+	public class PurchaseViewModel
+	{
+		public Guid Id { get; set; }
+		public DateTime DatePurchase { get; set; }
+		public required IUser User { get; set; }
+		public required List<IProduct> Products { get; set; }
+		public PurchaseStatus Status { get; set; }
+	}
+}

Contracts/ViewModels/SellViewModel.cs

@@ -0,0 +1,16 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+	public class SellViewModel
+	{
+		public Guid Id { get; set; }
+		public DateTime DateSell { get; set; }
+		public ISupplyDoc? SupplyDoc { get; set; }
+	}
+}

Contracts/ViewModels/SupplierViewModel.cs

@@ -0,0 +1,16 @@
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class SupplierViewModel
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public Dictionary<Guid, (IProduct, int)> AvailibleProducts = new();
+    }
+}

Contracts/ViewModels/SupplyDocViewModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class SupplyDocViewModel
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+    }
+}

Contracts/ViewModels/SupplyViewModel.cs

@@ -0,0 +1,23 @@
+using DataModels.Enums;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+    public class SupplyViewModel
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; } = string.Empty;
+        public Guid SupplierId { get; set; }
+        public string SupplierName { get; set; } = string.Empty;
+        public double Price { get; set; }
+        public Dictionary<Guid, (IProduct, int)> Products { get; set; } = new();
+        public DateTime Date { get; set; }
+        public SupplyStatus Status { get; set; }
+    }
+}

Contracts/ViewModels/UserProductViewModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.ViewModels
+{
+	public class UserProductViewModel
+	{
+		public string Name { get; set; } = string.Empty;
+		public double Price { get; set; }
+		public double Rate { get; set; }
+	}
+}

DataModels/Enums/PurchaseStatus.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Enums
+{
+	public enum PurchaseStatus
+	{
+		Unknown = -1,
+		Processing = 0,
+		Complited = 1
+	}
+}

DataModels/Enums/SupplyStatus.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Enums
+{
+    public enum SupplyStatus
+    {
+        Pending = -1,
+        Arriving = 0,
+        Completed = 1
+    }
+}

DataModels/Models/IMediaFile.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+	public interface IMediaFile : IId
+	{
+		string Name { get; }
+		string Location { get; }
+		Guid ProductId { get; }
+	}
+}

DataModels/Models/IProduct.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+	public interface IProduct : IId
+	{
+		string Name { get; }
+		double Price { get; }
+		bool IsBeingSold { get; }
+		public double Rate { get; }
+		int Amount { get; }
+		// будут браться через mediafilestorage так что скорее всего это тут не надо
+		// List<IMediaFile> MediaFiles { get; }
+	}
+}

DataModels/Models/IPurchase.cs

@@ -0,0 +1,15 @@
+using DataModels.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+	public interface IPurchase : IId
+	{
+		DateTime DatePurchase { get; }
+		PurchaseStatus Status { get; }
+	}
+}

DataModels/Models/ISell.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+	public interface ISell : IId
+	{
+		DateTime DateSell { get; }
+	}
+}

DataModels/Models/ISupplier.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+    public interface ISupplier : IId
+    {
+        string Name { get; }
+        Dictionary<Guid, (IProduct, int)> AvailibleProducts { get; }
+        int Deals { get; }
+    }
+}

DataModels/Models/ISupply.cs

@@ -0,0 +1,19 @@
+using DataModels.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+    public interface ISupply: IId
+    {
+        string Name { get; }
+        double Price { get; }
+        Guid SupplierId { get; }
+        DateTime Date { get; }
+        SupplyStatus Status { get; }
+        Dictionary<Guid, (IProduct, int)> SupplyProducts { get; }
+    }
+}

DataModels/Models/ISupplyDoc.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataModels.Models
+{
+	public interface ISupplyDoc : IId
+	{
+		string Name { get; }
+
+        Guid SupplyId { get; }
+    }
+}

DatabaseImplement/Database.cs

@@ -21,5 +21,14 @@ namespace DatabaseImplement
 
 		public virtual DbSet<Role> Roles { get; set; } = null!;
 		public virtual DbSet<User> Users { get; set; } = null!;
+		public virtual DbSet<Sell> Sells { get; set; } = null!;
+		public virtual DbSet<Purchase> Purchases { get; set; } = null!;
+		public virtual DbSet<Product> Products { get; set; } = null!;
+		public virtual DbSet<Supply> Supplies { get; set; } = null!;
+		public virtual DbSet<SupplyProduct> SupplyProducts { get; set; } = null!;
+		public virtual DbSet<Supplier> Suppliers { get; set; } = null!;
+        public virtual DbSet<SupplierProduct> SupplierProducts { get; set; } = null!;
+
+        public virtual DbSet<MediaFile> MediaFiles { get; set; } = null!;
 	}
 }

DatabaseImplement/Implements/ProductStorage.cs

@@ -0,0 +1,161 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using DatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Implements
+{
+    public class ProductStorage : IProductStorage
+    {
+        public ProductViewModel? Delete(ProductBindingModel model)
+        {
+            using var context = new Database();
+            var element = context.Products
+            .Include(x => x.Name)
+            .Include(x => x.Price)
+            .Include(x => x.IsBeingSold)
+            .Include(x => x.Rate)
+            .Include(x => x.Amount)
+            .FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Products.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public ProductViewModel? GetElement(ProductSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new Database();
+            return context.Products
+            .Include(x => x.Name)
+            .Include(x => x.Price)
+            .Include(x => x.IsBeingSold)
+            .Include(x => x.Rate)
+            .Include(x => x.Amount)
+            .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+
+        public List<ProductViewModel> GetFilteredList(ProductSearchModel model)
+        {
+            if (!model.IsBeingSold.HasValue && !model.Price.HasValue && !model.Rate.HasValue && !model.Amount.HasValue && string.IsNullOrEmpty(model.Name))
+            {
+                return new();
+            }
+            using var context = new Database();
+            if (model.Price.HasValue)
+            {
+                return context.Products
+                .Include(x => x.Name)
+                .Include(x => x.Price)
+                .Include(x => x.IsBeingSold)
+                .Include(x => x.Rate)
+                .Include(x => x.Amount)
+                .Where(x => x.Price <= model.Price)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            if (model.Rate.HasValue)
+            {
+                return context.Products
+                .Include(x => x.Name)
+                .Include(x => x.Price)
+                .Include(x => x.IsBeingSold)
+                .Include(x => x.Rate)
+                .Include(x => x.Amount)
+                .Where(x => x.Rate <= model.Rate)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            if (model.Amount.HasValue && model.IsBeingSold.HasValue)
+            {
+                return context.Products
+                .Include(x => x.Name)
+                .Include(x => x.Price)
+                .Include(x => x.IsBeingSold)
+                .Include(x => x.Rate)
+                .Include(x => x.Amount)
+                .Where(x => x.IsBeingSold == model.IsBeingSold && x.Amount >= model.Amount)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            return context.Products
+                .Include(x => x.Name)
+                .Include(x => x.Price)
+                .Include(x => x.IsBeingSold)
+                .Include(x => x.Rate)
+                .Include(x => x.Amount)
+                .Where(x => x.Name == model.Name)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<ProductViewModel> GetFullList()
+        {
+            using var context = new Database();
+            return context.Products
+            .Include(x => x.Name)
+            .Include(x => x.Price)
+            .Include(x => x.IsBeingSold)
+            .Include(x => x.Rate)
+            .Include(x => x.Amount)
+            .ToList()
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+
+        public ProductViewModel? Insert(ProductBindingModel model)
+        {
+            using var context = new Database();
+            var newProduct = Product.Create(context, model);
+            if (newProduct == null)
+            {
+                return null;
+            }
+            context.Products.Add(newProduct);
+            context.SaveChanges();
+            return newProduct.GetViewModel;
+        }
+
+        public ProductViewModel? Update(ProductBindingModel model)
+        {
+            using var context = new Database();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var product = context.Products.FirstOrDefault(rec =>
+                rec.Id == model.Id);
+                if (product == null)
+                {
+                    return null;
+                }
+                product.Update(model);
+                context.SaveChanges();
+                transaction.Commit();
+                return product.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+    }
+}

DatabaseImplement/Implements/SupplierStorage.cs

@@ -0,0 +1,121 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using DatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Implements
+{
+    public class SupplierStorage : ISupplierStorage
+    {
+        public SupplierViewModel? Delete(SupplierBindingModel model)
+        {
+            using var context = new Database();
+            var element = context.Suppliers
+            .Include(x => x.Products)
+            .FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Suppliers.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public SupplierViewModel? GetElement(SupplierSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new Database();
+            return context.Suppliers
+            .Include(x => x.Name)
+            .Include(x => x.Products)
+            .ThenInclude(x => x.Product)
+            .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+
+        public List<SupplierViewModel> GetFilteredList(SupplierSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.Name) && !model.Deals.HasValue)
+            {
+                return new();
+            }
+            using var context = new Database();
+            if (!string.IsNullOrEmpty(model.Name))
+            {
+                return context.Suppliers
+                .Include(x => x.Products)
+                .ThenInclude(x => x.Product)
+                .Where(x => model.Name == x.Name)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            return context.Suppliers
+                .Include(x => x.Products)
+                .ThenInclude(x => x.Product)
+                .Where(x => model.Deals <= x.Deals)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<SupplierViewModel> GetFullList()
+        {
+            using var context = new Database();
+            return context.Suppliers
+            .Include(x => x.Products)
+            .ThenInclude(x => x.Product)
+            .ToList()
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+
+        public SupplierViewModel? Insert(SupplierBindingModel model)
+        {
+            using var context = new Database();
+            var newProduct = Supplier.Create(context, model);
+            if (newProduct == null)
+            {
+                return null;
+            }
+            context.Suppliers.Add(newProduct);
+            context.SaveChanges();
+            return newProduct.GetViewModel;
+        }
+
+        public SupplierViewModel? Update(SupplierBindingModel model)
+        {
+            using var context = new Database();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var product = context.Suppliers.FirstOrDefault(rec =>
+                rec.Id == model.Id);
+                if (product == null)
+                {
+                    return null;
+                }
+                product.Update(context, model);
+                context.SaveChanges();
+                product.UpdateProducts(context, model);
+                transaction.Commit();
+                return product.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+    }
+}

DatabaseImplement/Implements/SupplyStorage.cs

@@ -0,0 +1,147 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.StorageContracts;
+using Contracts.ViewModels;
+using DatabaseImplement.Models;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Implements
+{
+    public class SupplyStorage : ISupplyStorage
+    {
+        public SupplyViewModel? Delete(SupplyBindingModel model)
+        {
+            using var context = new Database();
+            var element = context.Supplies
+            .Include(x => x.Products)
+            .FirstOrDefault(rec => rec.Id == model.Id);
+            if (element != null)
+            {
+                context.Supplies.Remove(element);
+                context.SaveChanges();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+
+        public SupplyViewModel? GetElement(SupplySearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return null;
+            }
+            using var context = new Database();
+            return context.Supplies
+            .Include(x => x.Supplier)
+            .Include(x => x.Products)
+            .ThenInclude(x => x.Product)
+            .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
+        }
+
+        public List<SupplyViewModel> GetFilteredList(SupplySearchModel model)
+        {
+            if (!model.DateStart.HasValue && !model.DateEnd.HasValue && model.Status == null) 
+            {
+                return new();
+            }
+            using var context = new Database();
+            if (model.DateStart.HasValue && model.DateEnd.HasValue)
+            {
+                return context.Supplies
+                .Include(x => x.Supplier)
+                .Include(x => x.Products)
+                .ThenInclude(x => x.Product)
+                .Where(x => x.Id == model.Id || model.DateStart <= x.Date && x.Date <= model.DateEnd)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            if (model.DateEnd.HasValue)
+            {
+                return context.Supplies
+                .Include(x => x.Supplier)
+                .Include(x => x.Products)
+                .ThenInclude(x => x.Product)
+                .Where(x => x.Id == model.Id || x.Date <= model.DateEnd)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            if (model.DateStart.HasValue)
+            {
+                return context.Supplies
+                .Include(x => x.Supplier)
+                .Include(x => x.Products)
+                .ThenInclude(x => x.Product)
+                .Where(x => x.Id == model.Id || model.DateStart <= x.Date)
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+            }
+            return context.Supplies
+                .Include(x => x.Supplier)
+                .Include(x => x.Products)
+                .ThenInclude(x => x.Product)
+                .Where(x => model.Status.Equals(x.Status))
+                .ToList()
+                .Select(x => x.GetViewModel)
+                .ToList();
+        }
+
+        public List<SupplyViewModel> GetFullList()
+        {
+            using var context = new Database();
+            return context.Supplies
+            .Include(x => x.Supplier)
+            .Include(x => x.Products)
+            .ThenInclude(x => x.Product)
+            .ToList()
+            .Select(x => x.GetViewModel)
+            .ToList();
+        }
+
+        public SupplyViewModel? Insert(SupplyBindingModel model)
+        {
+            using var context = new Database();
+            var newProduct = Supply.Create(context, model);
+            if (newProduct == null)
+            {
+                return null;
+            }
+            context.Supplies.Add(newProduct);
+            context.SaveChanges();
+            return newProduct.GetViewModel;
+        }
+
+        public SupplyViewModel? Update(SupplyBindingModel model)
+        {
+            using var context = new Database();
+            using var transaction = context.Database.BeginTransaction();
+            try
+            {
+                var product = context.Supplies.FirstOrDefault(rec =>
+                rec.Id == model.Id);
+                if (product == null)
+                {
+                    return null;
+                }
+                product.Update(model);
+                context.SaveChanges();
+                product.UpdateProducts(context, model);
+                transaction.Commit();
+                return product.GetViewModel;
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+    }
+}

DatabaseImplement/Models/MediaFile.cs

@@ -0,0 +1,70 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Models
+{
+	public class MediaFile : IMediaFile
+	{
+		[Required]
+		public Guid Id { get; set; }
+		[Required]
+		public string Name { get; set; } = string.Empty;
+		[Required]
+		public string Location { get; set; } = string.Empty;
+		[Required]
+		public Guid ProductId { get; set; }
+
+		public MediaFileBindingModel GetBindingModel()
+		{
+			return new MediaFileBindingModel
+			{
+				Id = Id,
+				Name = Name,
+				Location = Location,
+				ProductId = ProductId
+			};
+		}
+
+		public static MediaFile ToMediaFileFromView(MediaFileViewModel model, MediaFile mediaFile)
+		{
+			return new MediaFile
+			{
+				Id = model.Id,
+				Name = model.Name,
+				Location = model.Location,
+				ProductId = model.ProductId
+			};
+		}
+
+		public static MediaFile ToMediaFileFromBinding(MediaFileBindingModel model, MediaFile mediaFile)
+		{
+			return new MediaFile
+			{
+				Id = model.Id,
+				Name = model.Name,
+				Location = model.Location,
+				ProductId = model.ProductId
+			};
+		}
+
+		public void Update(MediaFileBindingModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			// Обновление свойств на основе модели привязки
+			Name = model.Name;
+			Location = model.Location;
+			ProductId = model.ProductId;
+		}
+	}
+}

DatabaseImplement/Models/Product.cs

@@ -0,0 +1,104 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace DatabaseImplement.Models
+{
+	public class Product : IProduct
+	{
+		[Required]
+		public Guid Id {  get; set; }
+		[Required]
+		public string Name { get; set; } = string.Empty;
+		[Required]
+		public double Price {  get; set; }
+		[Required]
+		public double Rate { get; set; }
+		[Required]
+		public bool IsBeingSold { get; set; }
+		[Required]
+		public int Amount { get; set; }
+
+		public ProductBindingModel GetBindingModel() => new()
+		{
+			Id = Id,
+			Name = Name,
+			Price = Price,
+			Rate = Rate,
+			IsBeingSold = IsBeingSold,
+			Amount = Amount
+		};
+
+		public static Product ToProductFromView(ProductViewModel model, Product product) => new()
+		{
+			Id = model.Id,
+			Name = model.Name,
+			Price = model.Price,
+			Rate = model.Rating,
+			IsBeingSold = model.IsBeingSold,
+			Amount = model.Amount
+		};
+
+		public static Product ToProductFromBinding(ProductBindingModel model, Product product) => new()
+		{
+			Id = model.Id,
+			Name = model.Name,
+			Price = model.Price,
+			Rate = model.Rate,
+			IsBeingSold = model.IsBeingSold,
+			Amount = model.Amount
+		};
+
+        public static Product Create(Database context, ProductBindingModel model)
+		{
+			return new Product()
+			{
+				Id = model.Id,
+				Name = model.Name,
+				Price = model.Price,
+				Rate = model.Rate,
+				IsBeingSold = model.IsBeingSold,
+				Amount = model.Amount
+			};
+		}
+
+
+        public void Update(ProductBindingModel model)
+		{
+			if (model is null)
+			{
+				throw new ArgumentNullException("Update product: binding model is null");
+			}
+
+			Name = model.Name;
+			Price = model.Price;
+			Rate = model.Rate;
+			IsBeingSold = model.IsBeingSold;
+			Amount = model.Amount;
+		}
+
+        public ProductViewModel GetViewModel
+        {
+            get
+            {
+                var context = new Database();
+                return new()
+                {
+                    Id = Id,
+                    Name = Name,
+                    Price = Price,
+                    IsBeingSold = IsBeingSold,
+                    Rating = Rate,
+					Amount = Amount
+                };
+            }
+        }
+    }
+}

DatabaseImplement/Models/Purchase.cs

@@ -0,0 +1,49 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Enums;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Models
+{
+	public class Purchase : IPurchase
+	{
+		public Guid Id { get; set; }
+		[Required]
+		public DateTime DatePurchase { get; set; }
+		[Required]
+		public PurchaseStatus  Status { get; private set; } = PurchaseStatus.Unknown;
+		public PurchaseBindingModel GetBindingModel() => new()
+		{
+			Id = Id,
+			DatePurchase = DatePurchase
+		};
+
+		public static Purchase ToPurchaseFromView(PurchaseViewModel model, Purchase purchase) => new()
+		{
+			Id = model.Id,
+			DatePurchase = model.DatePurchase
+		};
+
+		public static Purchase ToPurchaseFromBinding(PurchaseBindingModel model, Purchase purchase) => new()
+		{
+			Id = model.Id,
+			DatePurchase = model.DatePurchase,
+		};
+
+		public void Update(PurchaseBindingModel model, Purchase purchase)
+		{
+			if (model is null)
+			{
+				throw new ArgumentNullException("Update purchase: binding model is null");
+			}
+
+			DatePurchase = purchase.DatePurchase;
+		}
+	}
+}

DatabaseImplement/Models/Sell.cs

@@ -0,0 +1,44 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Models
+{
+	public class Sell : ISell
+	{
+		public Guid Id { get; set; }
+		public DateTime DateSell { get; set; }
+
+		public SellBindingModel GetBindingModel() => new()
+		{
+			Id = Id,
+			DateSell = DateSell
+		};
+		public static Sell ToSellFromView(SellViewModel model, Sell sell) => new()
+		{
+			Id = model.Id,
+			DateSell = model.DateSell
+		};
+
+		public static Sell ToSellFromBinding(SellBindingModel model, Sell sell) => new()
+		{
+			Id = model.Id,
+			DateSell = model.DateSell,
+		};
+
+		public void Update(SellBindingModel model, Sell sell)
+		{
+			if (model is null)
+			{
+				throw new ArgumentNullException("Update user: binding model is null");
+			}
+
+			DateSell = sell.DateSell;
+		}
+	}
+}

DatabaseImplement/Models/Supplier.cs

@@ -0,0 +1,109 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace DatabaseImplement.Models
+{
+    public class Supplier : ISupplier
+    {
+        public Guid Id { get; set; }
+        [Required]
+        public string Name { get; set; } = string.Empty;
+        [Required]
+        public int Deals { get; set; }
+        private Dictionary<Guid, (IProduct, int)>? _availibleProducts = null;
+        [NotMapped]
+        public Dictionary<Guid, (IProduct, int)> AvailibleProducts
+        {
+            get
+            {
+                if (_availibleProducts == null)
+                {
+                    _availibleProducts = Products
+                    .ToDictionary(recPC => recPC.Id, recPC =>
+                    (recPC.Product as IProduct, recPC.Count));
+                }
+                return _availibleProducts;
+            }
+        }
+        [ForeignKey("SupplierId")]
+        public virtual List<SupplierProduct> Products { get; set; } = new();
+
+        public static Supplier Create(Database context, SupplierBindingModel model)
+        {
+            return new Supplier()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Products = model.AvailibleProducts.Select(x => new
+                SupplierProduct
+                {
+                    Product = context.Products.First(y => y.Id == x.Key),
+                    Count = x.Value.Item2
+                }).ToList()
+            };
+        }
+        public void Update(Database context, SupplierBindingModel model)
+        {
+            Name = model.Name;
+            Products = model.AvailibleProducts.Select(x => new
+                SupplierProduct
+            {
+                Product = context.Products.First(y => y.Id == x.Key),
+                Count = x.Value.Item2
+            }).ToList();
+        }
+        public SupplierViewModel GetViewModel
+        {
+            get
+            {
+                var context = new Database();
+                return new()
+                {
+                    Id = Id,
+                    Name = Name,
+                    AvailibleProducts = AvailibleProducts
+                };
+            }
+        }
+        public void UpdateProducts(Database context, SupplierBindingModel model)
+        {
+            var supplierProducts = context.SupplierProducts.Where(rec =>
+            rec.Id == model.Id).ToList();
+            if (supplierProducts != null && supplierProducts.Count > 0)
+            { // удалили те, которых нет в модели
+                context.SupplierProducts.RemoveRange(supplierProducts.Where(rec
+                => !model.AvailibleProducts.ContainsKey(rec.ProductId)));
+                context.SaveChanges();
+                // обновили количество у существующих записей
+                foreach (var updateProduct in supplierProducts)
+                {
+                    updateProduct.Count = model.AvailibleProducts[updateProduct.ProductId].Item2;
+                    model.AvailibleProducts.Remove(updateProduct.ProductId);
+                }
+                context.SaveChanges();
+            }
+            var supplier = context.Suppliers.First(x => x.Id == Id);
+            foreach (var pc in model.AvailibleProducts)
+            {
+                context.SupplierProducts.Add(new SupplierProduct
+                {
+                    Supplier = supplier,
+                    Product = context.Products.First(x => x.Id == pc.Key),
+                    Count = pc.Value.Item2
+                });
+                context.SaveChanges();
+            }
+            _availibleProducts = null;
+        }
+    }
+}

DatabaseImplement/Models/SupplierProduct.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Models
+{
+    public class SupplierProduct
+    {
+        public Guid Id { get; set; }
+        [Required]
+        public Guid SupplierId { get; set; }
+        [Required]
+        public Guid ProductId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Supplier Supplier { get; set; } = new();
+        public virtual Product Product { get; set; } = new();
+    }
+}

DatabaseImplement/Models/Supply.cs

@@ -0,0 +1,118 @@
+using Contracts.BindingModels;
+using Contracts.ViewModels;
+using DataModels.Enums;
+using DataModels.Models;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Models
+{
+    public class Supply : ISupply
+    {
+        public Guid Id { get; set; }
+        [Required]
+        public string Name { get; set; } = string.Empty;
+        [Required]
+        public double Price { get; set; }
+        [Required]
+        public Guid SupplierId { get; set; }
+        [Required]
+        public DateTime Date { get; set; }
+        [Required]
+        public SupplyStatus Status { get; set; } = SupplyStatus.Pending;
+        private Dictionary<Guid, (IProduct, int)>? _supplyProducts = null;
+        [NotMapped]
+        public Dictionary<Guid, (IProduct, int)> SupplyProducts
+        {
+            get
+            {
+                if (_supplyProducts == null)
+                {
+                    _supplyProducts = Products
+                    .ToDictionary(recPC => recPC.Id, recPC =>
+                    (recPC.Product as IProduct, recPC.Count));
+                }
+                return _supplyProducts;
+            }
+        }
+        [ForeignKey("SupplyId")]
+        public virtual List<SupplyProduct> Products { get; set; } = new();
+        public virtual Supplier Supplier { get; set; }
+        public static Supply Create(Database context, SupplyBindingModel model)
+        {
+            return new Supply()
+            {
+                Id = model.Id,
+                Name = model.Name,
+                Price = model.Price,
+                Date = model.Date,
+                SupplierId = model.SupplierId,
+                Products = model.SupplyProducts.Select(x => new
+                SupplyProduct
+                {
+                    Product = context.Products.First(y => y.Id == x.Key),
+                    Count = x.Value.Item2
+                }).ToList()
+            };
+        }
+        public void Update(SupplyBindingModel model)
+        {
+            Name = model.Name;
+            Price = model.Price;
+        }
+        public SupplyViewModel GetViewModel
+        {
+            get
+            {
+                var context = new Database();
+                return new()
+                {
+                    Id = Id,
+                    Name = Name,
+                    Price = Price,
+                    Products = SupplyProducts,
+                    Date = Date,
+                    Status = Status,
+                    SupplierName = context.Suppliers.FirstOrDefault(x => x.Id == Id)?.Name ?? string.Empty,
+                };
+            }
+        }
+        public void UpdateProducts(Database context, SupplyBindingModel model)
+        {
+            var supplyProducts = context.SupplyProducts.Where(rec =>
+            rec.Id == model.Id).ToList();
+            if (supplyProducts != null && supplyProducts.Count > 0)
+            { // удалили те, которых нет в модели
+                context.SupplyProducts.RemoveRange(supplyProducts.Where(rec
+                => !model.SupplyProducts.ContainsKey(rec.ProductId)));
+                context.SaveChanges();
+                // обновили количество у существующих записей
+                foreach (var updateProduct in supplyProducts)
+                {
+                    updateProduct.Count = model.SupplyProducts[updateProduct.ProductId].Item2;
+                    model.SupplyProducts.Remove(updateProduct.ProductId);
+                }
+                context.SaveChanges();
+            }
+            var supply = context.Supplies.First(x => x.Id == Id);
+            foreach (var pc in model.SupplyProducts)
+            {
+                context.SupplyProducts.Add(new SupplyProduct
+                {
+                    Supply = supply,
+                    Product = context.Products.First(x => x.Id == pc.Key),
+                    Count = pc.Value.Item2
+                });
+                context.SaveChanges();
+            }
+            _supplyProducts = null;
+        }
+    }
+}

DatabaseImplement/Models/SupplyProduct.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseImplement.Models
+{
+    public class SupplyProduct
+    {
+        public Guid Id { get; set; }
+        [Required]
+        public Guid SupplyId { get; set; }
+        [Required]
+        public Guid ProductId { get; set; }
+        [Required]
+        public int Count { get; set; }
+        public virtual Supply Supply { get; set; } = new();
+        public virtual Product Product { get; set; } = new();
+    }
+}