blazor-hrm/Features/Leave/LeaveRequest/Cqrs/CreateLeaveRequestHandler.cs

using Indotalent.ConfigBackEnd.Extensions;
using Indotalent.Infrastructure.Database;
using MediatR;

namespace Indotalent.Features.Leave.LeaveRequest.Cqrs;

public class CreateLeaveRequestRequest
{
    public string EmployeeId { get; set; } = string.Empty;
    public string LeaveCategoryId { get; set; } = string.Empty;
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public double Days { get; set; }
    public string Reason { get; set; } = string.Empty;
    public string Status { get; set; } = "Pending";
    public string? AttachmentPath { get; set; }
}

public class CreateLeaveRequestResponse
{
    public string? Id { get; set; }
    public string? AutoNumber { get; set; }
}

public record CreateLeaveRequestCommand(CreateLeaveRequestRequest Data) : IRequest<CreateLeaveRequestResponse>;

public class CreateLeaveRequestHandler : IRequestHandler<CreateLeaveRequestCommand, CreateLeaveRequestResponse>
{
    private readonly AppDbContext _context;

    public CreateLeaveRequestHandler(AppDbContext context) => _context = context;

    public async Task<CreateLeaveRequestResponse> Handle(CreateLeaveRequestCommand request, CancellationToken cancellationToken)
    {
        var entityName = nameof(Data.Entities.LeaveRequest);

        var autoNo = await _context.GenerateAutoNumberAsync(
            entityName: entityName,
            prefixTemplate: $"{entityName.ToShortNameConsonant(3)}/{{Year}}/",
            ct: cancellationToken
        );

        var entity = new Data.Entities.LeaveRequest
        {
            AutoNumber = autoNo,
            EmployeeId = request.Data.EmployeeId,
            LeaveCategoryId = request.Data.LeaveCategoryId,
            StartDate = request.Data.StartDate,
            EndDate = request.Data.EndDate,
            Days = request.Data.Days,
            Reason = request.Data.Reason,
            Status = request.Data.Status,
            AttachmentPath = request.Data.AttachmentPath
        };

        _context.LeaveRequest.Add(entity);
        await _context.SaveChangesAsync(cancellationToken);

        return new CreateLeaveRequestResponse
        {
            Id = entity.Id,
            AutoNumber = entity.AutoNumber
        };
    }
}