Начало бизнес логики

University/University.sln

@@ -3,13 +3,15 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.9.34728.123
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "University", "University\University.csproj", "{300EBC23-D9F1-49E6-A1B0-A7A9D9AAABB3}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "University", "University\University.csproj", "{300EBC23-D9F1-49E6-A1B0-A7A9D9AAABB3}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UniversityDataModels", "UniversityDataModels\UniversityDataModels.csproj", "{48B8AA21-264D-457C-81E0-C7412970FD37}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UniversityDataModels", "UniversityDataModels\UniversityDataModels.csproj", "{48B8AA21-264D-457C-81E0-C7412970FD37}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UniversityContracts", "UniversityContracts\UniversityContracts.csproj", "{9510FE77-96E8-4ED9-B8D7-18FE309B98C9}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UniversityContracts", "UniversityContracts\UniversityContracts.csproj", "{9510FE77-96E8-4ED9-B8D7-18FE309B98C9}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UniversityDatabaseImplement", "UniversityDatabaseImplement\UniversityDatabaseImplement.csproj", "{A8D828DA-DC23-4D25-9B71-4169F5A55FC1}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UniversityDatabaseImplement", "UniversityDatabaseImplement\UniversityDatabaseImplement.csproj", "{A8D828DA-DC23-4D25-9B71-4169F5A55FC1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UniversityBusinessLogic", "UniversityBusinessLogic\UniversityBusinessLogic.csproj", "{C21D4CE2-0B08-40A5-BD7B-56F1C05FA109}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -33,6 +35,10 @@ Global
 		{A8D828DA-DC23-4D25-9B71-4169F5A55FC1}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A8D828DA-DC23-4D25-9B71-4169F5A55FC1}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A8D828DA-DC23-4D25-9B71-4169F5A55FC1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C21D4CE2-0B08-40A5-BD7B-56F1C05FA109}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C21D4CE2-0B08-40A5-BD7B-56F1C05FA109}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C21D4CE2-0B08-40A5-BD7B-56F1C05FA109}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C21D4CE2-0B08-40A5-BD7B-56F1C05FA109}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

University/UniversityBusinessLogic/BusinessLogics/StudentLogic.cs

@@ -0,0 +1,114 @@
+using Microsoft.Extensions.Logging;
+using UniversityContracts.BindingModels;
+using UniversityContracts.BusinessLogicsContracts;
+using UniversityContracts.SearchModels;
+using UniversityContracts.StorageContracts;
+using UniversityContracts.ViewModels;
+
+
+namespace UniversityBusinessLogic.BusinessLogics
+{
+    public class StudentLogic : IStudentLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IStudentStorage _studentStorage;
+        public StudentLogic(ILogger<StudentLogic> logger, IStudentStorage
+       studentStorage)
+        {
+            _logger = logger;
+            _studentStorage = studentStorage;
+        }
+        public List<StudentViewModel>? ReadList(StudentSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Name: {Name}.Id:{Id} ",
+                model?.Name, model?.Id);
+            var list = model == null ? _studentStorage.GetFullList() :
+                _studentStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+        public StudentViewModel? ReadElement(StudentSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Name:{Name}.Id:{Id}",
+                model.Name, model.Id);
+            var element = _studentStorage.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(StudentBindingModel model)
+        {
+            CheckModel(model);
+            if (_studentStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(StudentBindingModel model)
+        {
+            CheckModel(model);
+            if (_studentStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(StudentBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_studentStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(StudentBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет имени студента",
+               nameof(model.Name));
+            }
+            if (string.IsNullOrEmpty(model.PhoneNumber))
+            {
+                throw new ArgumentNullException("Должен быть номер телефона", nameof(model.PhoneNumber));
+            }
+            _logger.LogInformation("Student. Name:{Name}.PhoneNumber:{PhoneNumber}. Id: {Id}",
+                model.Name, model.PhoneNumber, model.Id);
+            var element = _studentStorage.GetElement(new StudentSearchModel
+            {
+                Name = model.Name
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Student с таким названием уже есть");
+            }
+        }
+    }
+}

University/UniversityBusinessLogic/UniversityBusinessLogic.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\UniversityContracts\UniversityContracts.csproj" />
+  </ItemGroup>
+
+</Project>