BusinessLogic/BusinessLogic.csproj

@@ -7,7 +7,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Folder Include="BusinessLogic\" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Contracts\Contracts.csproj" />
   </ItemGroup>
 
 </Project>

BusinessLogic/BusinessLogic/RoleLogic.cs

@@ -0,0 +1,99 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.Converters;
+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 RoleLogic : IRoleLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IRoleStorage _roleStorage;
+
+		public RoleLogic(ILogger<RoleLogic> logger, IRoleStorage roleStorage)
+		{
+			_logger = logger;
+			_roleStorage = roleStorage;
+		}
+
+		public RoleViewModel? Create(RoleBindingModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			var role = _roleStorage.Insert(model);
+			if (role is null)
+			{
+				_logger.LogWarning("Insert operation failed.");
+				return null;
+			}
+
+			return RoleConverter.ToView(role);
+		}
+
+		public RoleViewModel? Delete(RoleSearchModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			_logger.LogInformation("Delete role. Id: {0}", model.Id);
+			var role = _roleStorage.Delete(model);
+			if (role is null)
+			{
+				_logger.LogWarning("Delete operation failed.");
+				return null;
+			}
+
+			return RoleConverter.ToView(role);
+		}
+
+		public RoleViewModel? ReadElement(RoleSearchModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			_logger.LogInformation("ReadElement. Id: {0}", model.Id);
+			var role = _roleStorage.GetElement(model);
+			if (role is null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id: {0}", role.Id);
+
+			return RoleConverter.ToView(role);
+		}
+
+		public IEnumerable<RoleViewModel> ReadElements(RoleSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Id: {Id}", model?.Id);
+			var list = _roleStorage.GetList(model);
+			if (list is null || list.Count() == 0)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return [];
+			}
+			_logger.LogInformation("ReadList. Count: {Count}", list.Count());
+
+			return list.Select(RoleConverter.ToView);
+		}
+
+		public RoleViewModel? Update(RoleBindingModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			var role = _roleStorage.Update(model);
+			if (role is null)
+			{
+				_logger.LogWarning("Update operation failed.");
+				return null;
+			}
+			return RoleConverter.ToView(role);
+		}
+	}
+}

BusinessLogic/BusinessLogic/UserLogic.cs

@@ -0,0 +1,99 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.Converters;
+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 UserLogic : IUserLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IUserStorage _userStorage;
+
+		public UserLogic(ILogger<UserLogic> logger, IUserStorage userStorage)
+		{
+			_logger = logger;
+			_userStorage = userStorage;
+		}
+
+		public UserViewModel? Create(UserBindingModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			var user = _userStorage.Insert(model);
+			if (user is null)
+			{
+				_logger.LogWarning("Insert operation failed.");
+				return null;
+			}
+
+			return UserConverter.ToView(user);
+		}
+
+		public UserViewModel? Delete(UserSearchModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			_logger.LogInformation("Delete user. Id: {0}", model.Id);
+			var user = _userStorage.Delete(model);
+			if (user is null)
+			{
+				_logger.LogWarning("Delete operation failed.");
+				return null;
+			}
+
+			return UserConverter.ToView(user);
+		}
+
+		public IEnumerable<UserViewModel> ReadElements(UserSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Id: {Id}", model?.Id);
+			var list = _userStorage.GetList(model);
+			if (list is null || list.Count() == 0)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return [];
+			}
+			_logger.LogInformation("ReadList. Count: {Count}", list.Count());
+
+			return list.Select(UserConverter.ToView);
+		}
+
+		public UserViewModel? ReadElement(UserSearchModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			_logger.LogInformation("ReadElement. Id: {0}", model.Id);
+			var user = _userStorage.GetElement(model);
+			if (user is null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id: {0}", user.Id);
+
+			return UserConverter.ToView(user);
+		}
+
+		public UserViewModel? Update(UserBindingModel model)
+		{
+			ArgumentNullException.ThrowIfNull(model);
+
+			var user = _userStorage.Update(model);
+			if (user is null)
+			{
+				_logger.LogWarning("Update operation failed.");
+				return null;
+			}
+			return UserConverter.ToView(user);
+		}
+	}
+}

Contracts/BusinessLogicContracts/IRoleLogic.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 IRoleLogic
+	{
+		RoleViewModel? Create(RoleBindingModel model);
+
+		RoleViewModel? Update(RoleBindingModel model);
+
+		RoleViewModel? ReadElement(RoleSearchModel model);
+
+		IEnumerable<RoleViewModel> ReadElements(RoleSearchModel? model);
+
+		RoleViewModel? Delete(RoleSearchModel model);
+	}
+}

Contracts/BusinessLogicContracts/IUserLogic.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 IUserLogic
+	{
+		UserViewModel? Create(UserBindingModel model);
+
+		UserViewModel? Update(UserBindingModel model);
+
+		UserViewModel? ReadElement(UserSearchModel model);
+
+		IEnumerable<UserViewModel> ReadElements(UserSearchModel? model);
+
+		UserViewModel? Delete(UserSearchModel model);
+	}
+}

Contracts/Contracts.csproj

@@ -6,8 +6,4 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Folder Include="BusinessLogicContracts\" />
-  </ItemGroup>
-
 </Project>