сделал свою более сложную работу

CarCenter/CarCenter.sln

@@ -7,6 +7,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarCenter", "CarCenter.cspr
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarCenterDataModels", "..\CarCenterDataModels\CarCenterDataModels.csproj", "{5C83F791-9BDF-4EE7-A2F9-E163E9A26613}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarCenterContracts", "..\CarCenterContracts\CarCenterContracts.csproj", "{4A207999-1093-4596-B779-7366629753D3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -21,6 +23,10 @@ Global
 		{5C83F791-9BDF-4EE7-A2F9-E163E9A26613}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{5C83F791-9BDF-4EE7-A2F9-E163E9A26613}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{5C83F791-9BDF-4EE7-A2F9-E163E9A26613}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4A207999-1093-4596-B779-7366629753D3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4A207999-1093-4596-B779-7366629753D3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4A207999-1093-4596-B779-7366629753D3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4A207999-1093-4596-B779-7366629753D3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

CarCenterContracts/BindingModels/ClientBindingModel.cs

@@ -0,0 +1,17 @@
+using CarCenterDataModels;
+
+namespace CarCenterContracts.BindingModels
+{
+    public class  ClientBindingModel : IClientModel
+    {
+        public int DirectorId { get; set; }
+
+        public string Name { get; set; } = string.Empty;
+
+        public double Price { get; set; }
+
+        public int Course { get; set; }
+
+        public int Id { get; set; }
+    }
+}

CarCenterContracts/BindingModels/DirectorBindingModel.cs

@@ -0,0 +1,17 @@
+using CarCenterDataModels;
+
+namespace CarCenterContracts.BindingModels
+{
+    public class DirectorBindingModel : IDirectorModel
+    {
+        public string FirstName { get; set; } = string.Empty;
+
+        public string LastName { get; set; } = string.Empty;
+
+        public string Login { get; set; } = string.Empty;
+
+        public string Password { get; set; } = string.Empty;
+        public string PhoneNumber { get; set; } = string.Empty;
+        public int Id { get; set; }
+    }
+}

CarCenterContracts/BindingModels/RequirementBindingModel.cs

@@ -0,0 +1,17 @@
+using CarCenterDataModels;
+using CarCenterDataModels.ProxyModels;
+
+namespace CarCenterContracts.BindingModels
+{
+    public class RequirementBindingModel : IRequirementModel
+    {
+        public int DirectorId { get; set; }
+
+        public string NameOfRequirement { get; set; } = string.Empty;
+
+        public double Price { get; set; }
+        public Dictionary<int, RequirementByCarModel> CarsModels { get; set; } = new();
+
+        public int Id { get; set; }
+    }
+}

CarCenterContracts/BusinessLogicContracts/IClientLogic.cs

@@ -0,0 +1,15 @@
+using CarCenterContracts.BindingModels;
+using CarCenterContracts.SearchModels;
+using CarCenterContracts.ViewModels;
+
+namespace CarCenterContracts.BusinessLogicContracts
+{
+    public interface IClientLogic
+    {
+        List<ClientViewModel> ReadList(ClientSearchModel? model = null);
+        ClientViewModel ReadElement(ClientSearchModel model);
+        bool Create(ClientBindingModel model);
+        bool Update(ClientBindingModel model);
+        bool Delete(ClientBindingModel model);
+    }
+}

CarCenterContracts/BusinessLogicContracts/IDirectorLogic.cs

@@ -0,0 +1,12 @@
+using CarCenterContracts.BindingModels;
+using CarCenterContracts.SearchModels;
+using CarCenterContracts.ViewModels;
+
+namespace CarCenterContracts.BusinessLogicContracts
+{
+    public interface IDirectorLogic
+    {
+        DirectorViewModel ReadElement(DirectorSearchModel model);
+        bool Create(DirectorBindingModel model);
+    }
+}

CarCenterContracts/BusinessLogicContracts/IRequirementLogic.cs

@@ -0,0 +1,15 @@
+using CarCenterContracts.BindingModels;
+using CarCenterContracts.SearchModels;
+using CarCenterContracts.ViewModels;
+
+namespace CarCenterContracts.BusinessLogicContracts
+{
+    public interface IRequirementLogic
+    {
+        List<RequirementViewModel> ReadList(RequirementSearchModel? model = null);
+        RequirementViewModel ReadElement(RequirementSearchModel model);
+        bool Create(RequirementBindingModel model);
+        bool Update(RequirementBindingModel model);
+        bool Delete(RequirementBindingModel model);
+    }
+}

CarCenterContracts/CarCenterContracts.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\CarCenterDataModels\CarCenterDataModels.csproj" />
+  </ItemGroup>
+
+</Project>

CarCenterContracts/SearchModels/ClientSearchModel.cs

@@ -0,0 +1,11 @@
+namespace CarCenterContracts.SearchModels
+{
+    public class ClientSearchModel
+    {
+        public int? Id { get; set; }
+
+        public int? DirectorId { get; set; }
+
+        public List<int>? CarsIds { get; set; }
+    }
+}

CarCenterContracts/SearchModels/DirectorSearchModel.cs

@@ -0,0 +1,9 @@
+namespace CarCenterContracts.SearchModels
+{
+    public class DirectorSearchModel
+    {
+        public int? Id { get; set; }
+        public string? Login { get; set; }
+        public string? Password { get; set; }
+    }
+}

CarCenterContracts/SearchModels/RequirementSearchModel.cs

@@ -0,0 +1,9 @@
+namespace CarCenterContracts.SearchModels
+{
+    public class RequirementSearchModel
+    {
+        public int? Id { get; set; }
+
+        public int? DirectorId { get; set; }
+    }
+}

CarCenterContracts/StoragesContracts/IClientStorage.cs

@@ -0,0 +1,16 @@
+using CarCenterContracts.BindingModels;
+using CarCenterContracts.SearchModels;
+using CarCenterContracts.ViewModels;
+
+namespace CarCenterContracts.StoragesContracts
+{
+    public interface IClientStorage
+    {
+        List<ClientViewModel> GetFullList();
+        List<ClientViewModel> GetFilteredList(ClientSearchModel model);
+        ClientViewModel? GetElement(ClientSearchModel model);
+        ClientViewModel? Insert(ClientBindingModel model);
+        ClientViewModel? Update(ClientBindingModel model);
+        ClientViewModel? Delete(ClientBindingModel model);
+    }
+}

CarCenterContracts/StoragesContracts/IDirectorStorage.cs

@@ -0,0 +1,12 @@
+using CarCenterContracts.BindingModels;
+using CarCenterContracts.SearchModels;
+using CarCenterContracts.ViewModels;
+
+namespace CarCenterContracts.StoragesContracts
+{
+    public interface IDirectorStorage
+    {
+        DirectorViewModel? GetElement(DirectorSearchModel model);
+        DirectorViewModel? Insert(DirectorBindingModel model);
+    }
+}

CarCenterContracts/StoragesContracts/IRequirementStorage.cs

@@ -0,0 +1,16 @@
+using CarCenterContracts.BindingModels;
+using CarCenterContracts.SearchModels;
+using CarCenterContracts.ViewModels;
+
+namespace CarCenterContracts.StoragesContracts
+{
+    public interface IRequirementStorage
+    {
+        List<RequirementViewModel> GetFullList();
+        List<RequirementViewModel> GetFilteredList(RequirementSearchModel model);
+        RequirementViewModel? GetElement(RequirementSearchModel model);
+        RequirementViewModel? Insert(RequirementBindingModel model);
+        RequirementViewModel? Update(RequirementBindingModel model);
+        RequirementViewModel? Delete(RequirementBindingModel model);
+    }
+}

CarCenterContracts/ViewModels/ClientViewModel.cs

@@ -0,0 +1,28 @@
+using CarCenterDataModels;
+using System.ComponentModel;
+using System.Text;
+using System.Text.Json.Serialization;
+
+namespace CarCenterContracts.ViewModels
+{
+    public class ClientViewModel : IClientModel
+    {
+        public int Id { get; set; }
+        public int DirectorId { get; set; }
+        public string DirectorLogin { get; set; } = string.Empty;
+        public string Name { get; set; } = string.Empty;
+
+        [JsonIgnore]
+        public List<CarViewModel> Cars { get; set; } = new();
+        public override string ToString()
+        {
+            var result = new StringBuilder();
+            foreach (var Car in Cars)
+            {
+                result.Append($"Клиентом {Name} была приобретена марка {Car.ClientsModel[Id].DateOfClient.ToShortDateString()}, " +
+                              $"модель{Car.Name}.\n");
+            }
+            return result.ToString();
+        }
+    }
+}

CarCenterContracts/ViewModels/DirectorViewModel.cs

@@ -0,0 +1,19 @@
+using CarCenterDataModels;
+using System.ComponentModel;
+
+namespace CarCenterContracts.ViewModels
+{
+    public class DirectorViewModel : IDirectorModel
+    {
+        public int Id { get; set; }
+        [DisplayName("Фамилия")]
+        public string LastName { get; set; } = string.Empty;
+        [DisplayName("Имя")]
+        public string FirstName { get; set; } = string.Empty;
+        public string Login { get; set; } = string.Empty;
+        [DisplayName("Пароль")]
+        public string Password { get; set; } = string.Empty;
+
+        public string PhoneNumber { get; set; } = string.Empty;
+    }
+}

CarCenterContracts/ViewModels/RequirementViewModel.cs

@@ -0,0 +1,21 @@
+using CarCenterDataModels;
+using System.ComponentModel;
+using CarCenterDataModels.ProxyModels;
+
+namespace CarCenterContracts.ViewModels
+{
+    public class RequirementViewModel : IRequirementModel
+    {
+        public int Id { get; set; }
+        public int DirectorId { get; set; }
+        [DisplayName("Логин сотрудника")]
+        public string DirectorLogin { get; set; } = string.Empty;
+        [DisplayName("Наименование")]
+        public string NameOfRequirement { get; set; } = string.Empty;
+        [DisplayName("Стоимость")]
+        public double Price { get; set; }
+
+        // Дата счета дисциплины для отчета
+        public Dictionary<int, RequirementByCarModel> CarsModels { get; set; } = new();
+    }
+}