(B) Add attach family member to employee feature

Clinics.Backend/Application/Application.csproj

@@ -16,7 +16,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Folder Include="Employees\Commands\AttachFamilyMemberToEmployee\" />
     <Folder Include="Employees\Queries\" />
   </ItemGroup>
 </Project>

Clinics.Backend/Application/Employees/Commands/AttachFamilyMemberToEmployee/AttachFamilyMemberToEmployeeCommand.cs

+using Application.Abstractions.CQRS.Commands;
+
+namespace Application.Employees.Commands.AttachFamilyMemberToEmployee;
+
+public class AttachFamilyMemberToEmployeeCommand : ICommand
+{
+    public string EmployeeSerialNumber { get; set; } = null!;
+
+    public string FirstName { get; set; } = null!;
+    public string MiddleName { get; set; } = null!;
+    public string LastName { get; set; } = null!;
+    public DateOnly DateOfBirth { get; set; }
+    public string Gender { get; set; } = null!;
+
+    public string FamilyRole { get; set; } = null!;
+
+}

Clinics.Backend/Application/Employees/Commands/AttachFamilyMemberToEmployee/AttachFamilyMemberToEmployeeCommandHandler.cs

+using Application.Abstractions.CQRS.Commands;
+using Domain.Entities.People.Employees;
+using Domain.Entities.People.FamilyMembers;
+using Domain.Errors;
+using Domain.Repositories;
+using Domain.Shared;
+using Domain.UnitOfWork;
+
+namespace Application.Employees.Commands.AttachFamilyMemberToEmployee;
+
+public class AttachFamilyMemberToEmployeeCommandHandler : ICommandHandler<AttachFamilyMemberToEmployeeCommand>
+{
+    #region CTOR DI
+    private readonly IEmployeesRepository _employeesRepository;
+    private readonly IUnitOfWork _unitOfWork;
+
+    public AttachFamilyMemberToEmployeeCommandHandler(IEmployeesRepository employeesRepository, IUnitOfWork unitOfWork)
+    {
+        _employeesRepository = employeesRepository;
+        _unitOfWork = unitOfWork;
+    }
+    #endregion
+    public async Task<Result> Handle(AttachFamilyMemberToEmployeeCommand request, CancellationToken cancellationToken)
+    {
+        #region 1. Create family member
+        Result<FamilyMember> familyMemberResult
+            = FamilyMember
+            .Create(request.FirstName, request.MiddleName, request.LastName, request.DateOfBirth, request.Gender);
+        if (familyMemberResult.IsFailure)
+            return Result.Failure(familyMemberResult.Error);
+        #endregion
+
+        #region 2. Get employee by serial number
+        Result<Employee> employeeResult = await _employeesRepository
+            .GetEmployeeBySerialNumberAsync(request.EmployeeSerialNumber);
+        if (employeeResult.IsFailure)
+            return Result.Failure(employeeResult.Error);
+        #endregion
+
+        #region 3. Attach family member to employee
+        Result attachFamilyMemberResult = employeeResult
+            .Value
+            .AddFamilyMember(familyMemberResult.Value, request.FamilyRole);
+        if (attachFamilyMemberResult.IsFailure)
+            return Result.Failure(attachFamilyMemberResult.Error);
+        #endregion
+
+        #region 4. Confirm update
+        try
+        {
+            _employeesRepository.Update(employeeResult.Value);
+            await _unitOfWork.SaveChangesAsync();
+        }
+        catch (Exception)
+        {
+            return Result.Failure(PersistenceErrors.UnableToCompleteTransaction);
+        }
+
+        return Result.Success();
+        #endregion
+
+
+    }
+}

Clinics.Backend/Presentation/Controllers/EmployeesController.cs

-using Application.Employees.Commands.CreateEmployee;
+using Application.Employees.Commands.AttachFamilyMemberToEmployee;
+using Application.Employees.Commands.CreateEmployee;
 using MediatR;
 using Microsoft.AspNetCore.Mvc;
 using Presentation.Controllers.Base;
@@ -17,11 +18,20 @@ public class EmployeesController : ApiController
 
 
     [HttpPost]
-    public async Task<IActionResult> Create(CreateEmployeeCommand command)
+    public async Task<IActionResult> Create([FromBody] CreateEmployeeCommand command)
     {
         var result = await _sender.Send(command);
         if (result.IsFailure)
             return HandleFailure(result);
         return Created();
     }
+
+    [HttpPut("FamilyMembers")]
+    public async Task<IActionResult> AttachFamilyMember([FromBody] AttachFamilyMemberToEmployeeCommand command)
+    {
+        var result = await _sender.Send(command);
+        if (result.IsFailure)
+            return HandleFailure(result);
+        return Ok();
+    }
 }