3. Сырая бизнес-логика, добавлены классы Storage

2023-04-08 05:05:19 +04:00 · 2023-04-08 05:05:19 +04:00 · e10647bca8
commit e10647bca8
parent 13e4dddbbe
15 changed files with 680 additions and 1 deletions
--- a/LawFirm/LawFirm.sln
+++ b/LawFirm/LawFirm.sln
@ -7,6 +7,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LawFirmView", "LawFirm\LawF
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LawFirmContracts", "LawFirmContracts\LawFirmContracts.csproj", "{E2306BF5-FCE9-4195-85BF-22C35495A8D0}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LawFirmBusinessLogic", "LawFirmBusinessLogic\LawFirmBusinessLogic.csproj", "{08E0AB8D-1F53-4757-BA64-D76A2EB866C0}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@ -21,6 +23,10 @@ Global
 		{E2306BF5-FCE9-4195-85BF-22C35495A8D0}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E2306BF5-FCE9-4195-85BF-22C35495A8D0}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E2306BF5-FCE9-4195-85BF-22C35495A8D0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{08E0AB8D-1F53-4757-BA64-D76A2EB866C0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{08E0AB8D-1F53-4757-BA64-D76A2EB866C0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{08E0AB8D-1F53-4757-BA64-D76A2EB866C0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{08E0AB8D-1F53-4757-BA64-D76A2EB866C0}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
--- a/LawFirm/LawFirm/LawFirmView.csproj
+++ b/LawFirm/LawFirm/LawFirmView.csproj
@ -8,4 +8,19 @@
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
+    <PackageReference Include="NLog.Extensions.Logging" Version="5.2.3" />
+  </ItemGroup>
+
 </Project>
--- a/LawFirm/LawFirmBusinessLogic/BusinessLogics/CaseLogic.cs
+++ b/LawFirm/LawFirmBusinessLogic/BusinessLogics/CaseLogic.cs
@ -0,0 +1,107 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.BusinessLogicsContracts;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.StorageContracts;
+using LawFirmContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace LawFirmBusinessLogic.BusinessLogics
+{
+    public class CaseLogic : ICaseLogic
+    {
+        private readonly ILogger _logger;
+        private readonly ICaseStorage _caseStorage;
+
+        public CaseLogic(ILogger<CaseLogic> logger, ICaseStorage caseStorage)
+        {
+            _logger = logger;
+            _caseStorage = caseStorage;
+        }
+
+        public List<CaseViewModel>? ReadList(CaseSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Id:{Id}", model?.Id);
+            var list = model == null ? _caseStorage.GetFullList() : _caseStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public CaseViewModel? ReadElement(CaseSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id:{Id}", model.Id);
+            var element = _caseStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        public bool Create(CaseBindingModel model)
+        {
+            CheckModel(model);
+            if (_caseStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(CaseBindingModel model)
+        {
+            CheckModel(model);
+            if (_caseStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(CaseBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_caseStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(CaseBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (model.CustomerId < 0)
+            {
+                throw new InvalidOperationException("Неверный ID клиента");
+            }
+            _logger.LogInformation("Case. DateCreated:{DateCreated}. CustomerId:{CustomerId}. Id:{Id}", model.DateCreated, model.CustomerId, model.Id);
+        }
+    }
+}
+
--- a/LawFirm/LawFirmBusinessLogic/BusinessLogics/CustomerLogic.cs
+++ b/LawFirm/LawFirmBusinessLogic/BusinessLogics/CustomerLogic.cs
@ -0,0 +1,128 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.BusinessLogicsContracts;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.StorageContracts;
+using LawFirmContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace LawFirmBusinessLogic.BusinessLogics
+{
+    public class CustomerLogic : ICustomerLogic
+    {
+        private readonly ILogger _logger;
+        private readonly ICustomerStorage _customerStorage;
+        public CustomerLogic(ILogger<CustomerLogic> logger, ICustomerStorage customerStorage)
+        {
+            _logger = logger;
+            _customerStorage = customerStorage;
+        }
+        public bool Create(CustomerBindingModel model)
+        {
+            CheckModel(model);
+            if (_customerStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(CustomerBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id: {Id}", model.Id);
+            if (_customerStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public CustomerViewModel ReadElement(CustomerSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id: {Id}", model.Id);
+            var element = _customerStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement found. Id: {Id}", element.Id);
+            return element;
+        }
+
+        public bool Update(CustomerBindingModel model)
+        {
+            CheckModel(model);
+            if (_customerStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public List<CustomerViewModel>? ReadList(CustomerSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Id: {Id}", model?.Id);
+            var list = model == null ? _customerStorage.GetFullList() : _customerStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
+            return list;
+        }
+
+        private void CheckModel(CustomerBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Login))
+            {
+                _logger.LogWarning("Login is empty");
+                throw new ArgumentNullException("Не заполнен логин");
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                _logger.LogWarning("Name is empty");
+                throw new ArgumentNullException("Не заполнено имя");
+            }
+            if (string.IsNullOrEmpty(model.Surname))
+            {
+                _logger.LogWarning("Surname is empty");
+                throw new ArgumentNullException("Не заполнена фамилия");
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                _logger.LogWarning("Password is empty");
+                throw new ArgumentNullException("Не заполнен пароль");
+            }
+            var ExistingCustomer = _customerStorage.GetElement
+                (new CustomerSearchModel() { Login = model.Login });
+            if (ExistingCustomer != null)
+            {
+                _logger.LogWarning("There is already a user with this login");
+                throw new ArgumentException("Пользователь с таким логином уже есть");
+            }
+            _logger.LogInformation("Customer. Id: {Id}", model.Id);
+        }
+    }
+}
--- a/LawFirm/LawFirmBusinessLogic/BusinessLogics/ItemLogic.cs
+++ b/LawFirm/LawFirmBusinessLogic/BusinessLogics/ItemLogic.cs
@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.BusinessLogicsContracts;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.StorageContracts;
+using LawFirmContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace LawFirmBusinessLogic.BusinessLogics
+{
+    public class ItemLogic : IItemLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IItemStorage _paymentStorage;
+        public ItemLogic(ILogger<ItemLogic> logger, IItemStorage paymentStorage)
+        {
+            _logger = logger;
+            _paymentStorage = paymentStorage;
+        }
+        public List<ItemViewModel>? ReadList(ItemSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Id: {Id}", model?.Id);
+            var list = model == null ? _paymentStorage.GetFullList() : _paymentStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
+            return list;
+        }
+        public ItemViewModel? ReadElement(ItemSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id: {Id}", model.Id);
+            var element = _paymentStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement found. Id: {Id}", element.Id);
+            return element;
+        }
+        public bool Create(ItemBindingModel model)
+        {
+            CheckModel(model);
+            if (_paymentStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(ItemBindingModel model)
+        {
+            CheckModel(model);
+            if (_paymentStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(ItemBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_paymentStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(ItemBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            _logger.LogInformation("Item. Id: {Id}", model.Id);
+        }
+    }
+}
--- a/LawFirm/LawFirmBusinessLogic/BusinessLogics/PaymentLogic.cs
+++ b/LawFirm/LawFirmBusinessLogic/BusinessLogics/PaymentLogic.cs
@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.BusinessLogicsContracts;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.StorageContracts;
+using LawFirmContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace LawFirmBusinessLogic.BusinessLogics
+{
+    public class PaymentLogic : IPaymentLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IPaymentStorage paymentStorage;
+        public PaymentLogic(ILogger<PaymentLogic> logger, IPaymentStorage paymentStorage)
+        {
+            _logger = logger;
+            this.paymentStorage = paymentStorage;
+        }
+        public List<PaymentViewModel>? ReadList(PaymentSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Id: {Id}", model?.Id);
+            var list = model == null ? paymentStorage.GetFullList() : paymentStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
+            return list;
+        }
+        public PaymentViewModel? ReadElement(PaymentSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id: {Id}", model.Id);
+            var element = paymentStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement found. Id: {Id}", element.Id);
+            return element;
+        }
+        public bool Create(PaymentBindingModel model)
+        {
+            CheckModel(model);
+            if (paymentStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(PaymentBindingModel model)
+        {
+            CheckModel(model);
+            if (paymentStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(PaymentBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (paymentStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(PaymentBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            _logger.LogInformation("Payment. Id: {Id}", model.Id);
+        }
+    }
+}
--- a/LawFirm/LawFirmBusinessLogic/BusinessLogics/ServiceLogic.cs
+++ b/LawFirm/LawFirmBusinessLogic/BusinessLogics/ServiceLogic.cs
@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.BusinessLogicsContracts;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.StorageContracts;
+using LawFirmContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace LawFirmBusinessLogic.BusinessLogics
+{
+    public class ServiceLogic : IServiceLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IServiceStorage _serviceStorage;
+        public ServiceLogic(ILogger<ServiceLogic> logger, IServiceStorage serviceStorage)
+        {
+            _logger = logger;
+            _serviceStorage = serviceStorage;
+        }
+        public List<ServiceViewModel>? ReadList(ServiceSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Id: {Id}", model?.Id);
+            var list = model == null ? _serviceStorage.GetFullList() : _serviceStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
+            return list;
+        }
+        public ServiceViewModel? ReadElement(ServiceSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id: {Id}", model.Id);
+            var element = _serviceStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement found. Id: {Id}", element.Id);
+            return element;
+        }
+        public bool Create(ServiceBindingModel model)
+        {
+            CheckModel(model);
+            if (_serviceStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(ServiceBindingModel model)
+        {
+            CheckModel(model);
+            if (_serviceStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(ServiceBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id: {Id}", model.Id);
+            if (_serviceStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(ServiceBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                _logger.LogWarning("Service name is empty");
+                throw new ArgumentException("Укажите название услуги");
+            }
+            _logger.LogInformation("Service. Id: {Id}", model.Id);
+        }
+    }
+}
--- a/LawFirm/LawFirmBusinessLogic/LawFirmBusinessLogic.csproj
+++ b/LawFirm/LawFirmBusinessLogic/LawFirmBusinessLogic.csproj
@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\LawFirmContracts\LawFirmContracts.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/LawFirm/LawFirmContracts/LawFirmContracts.csproj
+++ b/LawFirm/LawFirmContracts/LawFirmContracts.csproj
@ -7,7 +7,18 @@
  </PropertyGroup>

  <ItemGroup>
-    <Folder Include="StorageContracts\" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
+    <PackageReference Include="NLog.Extensions.Logging" Version="5.2.3" />
  </ItemGroup>

 </Project>
--- a/LawFirm/LawFirmContracts/SearchModels/CustomerSearchModel.cs
+++ b/LawFirm/LawFirmContracts/SearchModels/CustomerSearchModel.cs
@ -9,5 +9,6 @@ namespace LawFirmContracts.SearchModels
    public class CustomerSearchModel
    {
        public int? Id { get; set; }
+        public string? Login { get; set; }
    }
 }
--- a/LawFirm/LawFirmContracts/StorageContracts/ICaseStorage.cs
+++ b/LawFirm/LawFirmContracts/StorageContracts/ICaseStorage.cs
@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.ViewModels;
+
+namespace LawFirmContracts.StorageContracts
+{
+    public interface ICaseStorage
+    {
+        List<CaseViewModel> GetFullList();
+        List<CaseViewModel> GetFilteredList(CaseSearchModel model);
+        CaseViewModel? GetElement(CaseSearchModel model);
+        CaseViewModel? Insert(CaseBindingModel model);
+        CaseViewModel? Update(CaseBindingModel model);
+        CaseViewModel? Delete(CaseBindingModel model);
+    }
+}
--- a/LawFirm/LawFirmContracts/StorageContracts/ICustomerStorage.cs
+++ b/LawFirm/LawFirmContracts/StorageContracts/ICustomerStorage.cs
@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.ViewModels;
+
+namespace LawFirmContracts.StorageContracts
+{
+    public interface ICustomerStorage
+    {
+        List<CustomerViewModel> GetFullList();
+        List<CustomerViewModel> GetFilteredList(CustomerSearchModel model);
+        CustomerViewModel? GetElement(CustomerSearchModel model);
+        CustomerViewModel? Insert(CustomerBindingModel model);
+        CustomerViewModel? Update(CustomerBindingModel model);
+        CustomerViewModel? Delete(CustomerBindingModel model);
+    }
+}
--- a/LawFirm/LawFirmContracts/StorageContracts/IItemStorage.cs
+++ b/LawFirm/LawFirmContracts/StorageContracts/IItemStorage.cs
@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.ViewModels;
+
+namespace LawFirmContracts.StorageContracts
+{
+    public interface IItemStorage
+    {
+        List<ItemViewModel> GetFullList();
+        List<ItemViewModel> GetFilteredList(ItemSearchModel model);
+        ItemViewModel? GetElement(ItemSearchModel model);
+        ItemViewModel? Insert(ItemBindingModel model);
+        ItemViewModel? Update(ItemBindingModel model);
+        ItemViewModel? Delete(ItemBindingModel model);
+    }
+}
--- a/LawFirm/LawFirmContracts/StorageContracts/IPaymentStorage.cs
+++ b/LawFirm/LawFirmContracts/StorageContracts/IPaymentStorage.cs
@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.ViewModels;
+
+namespace LawFirmContracts.StorageContracts
+{
+    public interface IPaymentStorage
+    {
+        List<PaymentViewModel> GetFullList();
+        List<PaymentViewModel> GetFilteredList(PaymentSearchModel model);
+        PaymentViewModel? GetElement(PaymentSearchModel model);
+        PaymentViewModel? Insert(PaymentBindingModel model);
+        PaymentViewModel? Update(PaymentBindingModel model);
+        PaymentViewModel? Delete(PaymentBindingModel model);
+    }
+}
--- a/LawFirm/LawFirmContracts/StorageContracts/IServiceStorage.cs
+++ b/LawFirm/LawFirmContracts/StorageContracts/IServiceStorage.cs
@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using LawFirmContracts.BindingModels;
+using LawFirmContracts.SearchModels;
+using LawFirmContracts.ViewModels;
+
+namespace LawFirmContracts.StorageContracts
+{
+    public interface IServiceStorage
+    {
+        List<ServiceViewModel> GetFullList();
+        List<ServiceViewModel> GetFilteredList(ServiceSearchModel model);
+        ServiceViewModel? GetElement(ServiceSearchModel model);
+        ServiceViewModel? Insert(ServiceBindingModel model);
+        ServiceViewModel? Update(ServiceBindingModel model);
+        ServiceViewModel? Delete(ServiceBindingModel model);
+    }
+}