Guarantor: Shifted from user model to guarantor model + all implementations.

ComputerStoreBusinessLogic/BusinessLogic/EmployeeLogic.cs

@@ -0,0 +1,122 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.BusinessLogicContracts;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.StorageContracts;
+using ComputerStoreContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreBusinessLogic.BusinessLogic
+{
+    public class EmployeeLogic : IEmployeeLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IEmployeeStorage _employeeStorage;
+        public EmployeeLogic(ILogger<EmployeeLogic> logger, IEmployeeStorage employeeStorage)
+        {
+            _logger = logger;
+            _employeeStorage = employeeStorage;
+        }
+        public bool Create(EmployeeBindingModel model)
+        {
+            CheckUser(model);
+            if (_employeeStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Update(EmployeeBindingModel model)
+        {
+            CheckUser(model);
+            if (_employeeStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public bool Delete(EmployeeBindingModel model)
+        {
+            CheckUser(model, false);
+            _logger.LogInformation("Delete. ID:{ID}", model.ID);
+            if (_employeeStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        public EmployeeViewModel? ReadElement(EmployeeSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Username:{Username}.ID:{ ID}", model.Username, model.ID);
+            var element = _employeeStorage.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<EmployeeViewModel>? ReadList(EmployeeSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Username:{Username}. ID:{ ID}", model?.Username, model?.ID);
+
+            var list = model == null ? _employeeStorage.GetFullList() : _employeeStorage.GetFilteredList(model);
+
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public void CheckUser(EmployeeBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Username))
+            {
+                throw new ArgumentNullException("Invalid username of user", nameof(model.Username));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Invalid password of user", nameof(model.Password));
+            }
+
+            _logger.LogInformation("Client. Email:{ Email}. ID: { ID} ", model.Username, model.ID);
+
+            var element = _employeeStorage.GetElement(new EmployeeSearchModel
+            {
+                Username = model.Username
+            });
+
+            if (element != null && element.ID != model.ID)
+            {
+                throw new InvalidOperationException("Employee with such username already exists.");
+            }
+        }
+    }
+}

ComputerStoreContracts/BindingModels/EmployeeBindingModel.cs

@@ -1,5 +1,4 @@
-using ComputerStoreDataModels.Enums;
-using ComputerStoreDataModels.Models;
+using ComputerStoreDataModels.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -8,7 +7,7 @@ using System.Threading.Tasks;
 
 namespace ComputerStoreContracts.BindingModels
 {
-    public class UserBindingModel : IUserModel
+    public class EmployeeBindingModel : IEmployeeModel
     {
         public int ID { get; set; }
         public string Username { get; set; } = string.Empty;
@@ -16,6 +15,5 @@ namespace ComputerStoreContracts.BindingModels
         public string FirstName { get; set; } = string.Empty;
         public string LastName { get; set; } = string.Empty;
         public string MiddleName { get; set; } = string.Empty;
-        public Role Role { get; set; } = Role.Unknown;
     }
 }

ComputerStoreContracts/BusinessLogicContracts/IEmployeeLogic.cs

@@ -0,0 +1,20 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.BusinessLogicContracts
+{
+    public interface IEmployeeLogic
+    {
+        List<EmployeeViewModel>? ReadList(EmployeeSearchModel? model);
+        EmployeeViewModel? ReadElement(EmployeeSearchModel model);
+        bool Create(EmployeeBindingModel model);
+        bool Update(EmployeeBindingModel model);
+        bool Delete(EmployeeBindingModel model);
+    }
+}

ComputerStoreContracts/SearchModels/EmployeeSearchModel.cs

@@ -1,5 +1,4 @@
-using ComputerStoreDataModels.Enums;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -7,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace ComputerStoreContracts.SearchModels
 {
-    public class UserSearchModel
+    public class EmployeeSearchModel
     {
         public int? ID { get; set; }
         public string? Username { get; set; }

ComputerStoreContracts/StorageContracts/IEmployeeStorage.cs

@@ -0,0 +1,21 @@
+using ComputerStoreContracts.BindingModels;
+using ComputerStoreContracts.SearchModels;
+using ComputerStoreContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.StorageContracts
+{
+    public interface IEmployeeStorage
+    {
+        List<EmployeeViewModel> GetFullList();
+        List<EmployeeViewModel> GetFilteredList(EmployeeSearchModel model);
+        EmployeeViewModel? GetElement(EmployeeSearchModel model);
+        EmployeeViewModel? Insert(EmployeeBindingModel model);
+        EmployeeViewModel? Update(EmployeeBindingModel model);
+        EmployeeViewModel? Delete(EmployeeBindingModel model);
+    }
+}

ComputerStoreContracts/ViewModels/EmployeeViewModel.cs

@@ -0,0 +1,31 @@
+using ComputerStoreDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreContracts.ViewModels
+{
+    public class EmployeeViewModel : IEmployeeModel
+    {
+        public int ID { get; set; }
+
+        [DisplayName("Employee's login")]
+        public string Username { get; set; } = string.Empty;
+
+        public string Password { get; set; } = string.Empty;
+
+        [DisplayName("Employee's first name")]
+        public string FirstName { get; set; } = string.Empty;
+
+        [DisplayName("Employee's last name")]
+        public string LastName { get; set; } = string.Empty;
+
+        [DisplayName("Employee's middle name")]
+        public string MiddleName { get; set; } = string.Empty;
+
+
+    }
+}

ComputerStoreContracts/ViewModels/UserViewModel.cs

@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace ComputerStoreContracts.ViewModels
-{
-    internal class UserViewModel
-    {
-    }
-}

ComputerStoreDataModels/Enums/Role.cs

@@ -1,15 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace ComputerStoreDataModels.Enums
-{
-    public enum Role
-    {
-        Unknown = -1,
-        Guarantor = 0,
-        Cotnractor = 1
-    }
-}

ComputerStoreDataModels/Models/IEmployeeModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ComputerStoreDataModels.Models
+{
+    public interface IEmployeeModel : IID
+    {
+        string Username { get; } 
+        string Password { get; } 
+        string FirstName { get; } 
+        string LastName { get; } 
+        string MiddleName { get; } 
+    }
+}

ComputerStoreDataModels/Models/IUserModel.cs

@@ -1,20 +0,0 @@
-using ComputerStoreDataModels.Enums;
-using System;
-using System.Collections.Generic;
-using System.ComponentModel.DataAnnotations;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace ComputerStoreDataModels.Models
-{
-    public interface IUserModel : IID
-    {
-        string Username { get; }
-        string Password { get; }
-        string FirstName { get; }
-        string LastName { get; }
-        string MiddleName { get; }   
-        Role Role { get; } 
-    }
-}