blazor-crm/Features/Purchase/PurchaseOrder/Cqrs/GetPurchaseOrderByIdHandler.cs

using Indotalent.Infrastructure.Database;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace Indotalent.Features.Purchase.PurchaseOrder.Cqrs;

public class PurchaseOrderItemResponse
{
    public string? Id { get; set; }
    public string? ProductId { get; set; }
    public string? ProductName { get; set; }
    public string? Summary { get; set; }
    public decimal? UnitPrice { get; set; }
    public double? Quantity { get; set; }
    public decimal? Total { get; set; }
}

public class GetPurchaseOrderByIdResponse
{
    public string? Id { get; set; }
    public string? AutoNumber { get; set; }
    public DateTime? OrderDate { get; set; }
    public Data.Enums.PurchaseOrderStatus OrderStatus { get; set; }
    public string? Description { get; set; }
    public string? VendorId { get; set; }
    public string? VendorName { get; set; }
    public string? VendorStreet { get; set; }
    public string? VendorCity { get; set; }
    public string? VendorState { get; set; }
    public string? VendorZipCode { get; set; }
    public string? VendorPhone { get; set; }
    public string? VendorEmail { get; set; }
    public string? VendorFax { get; set; }
    public string? CompanyName { get; set; }
    public string? CompanyStreet { get; set; }
    public string? CompanyCity { get; set; }
    public string? CompanyState { get; set; }
    public string? CompanyZipCode { get; set; }
    public string? CompanyPhone { get; set; }
    public string? CompanyEmail { get; set; }
    public string? CurrencySymbol { get; set; }
    public string? TaxId { get; set; }
    public decimal? BeforeTaxAmount { get; set; }
    public decimal? TaxAmount { get; set; }
    public decimal? AfterTaxAmount { get; set; }
    public DateTimeOffset? CreatedAt { get; set; }
    public string? CreatedBy { get; set; }
    public DateTimeOffset? UpdatedAt { get; set; }
    public string? UpdatedBy { get; set; }
    public List<PurchaseOrderItemResponse> Items { get; set; } = new();
}

public record GetPurchaseOrderByIdQuery(string Id) : IRequest<GetPurchaseOrderByIdResponse?>;

public class GetPurchaseOrderByIdHandler : IRequestHandler<GetPurchaseOrderByIdQuery, GetPurchaseOrderByIdResponse?>
{
    private readonly AppDbContext _context;
    public GetPurchaseOrderByIdHandler(AppDbContext context) => _context = context;

    public async Task<GetPurchaseOrderByIdResponse?> Handle(GetPurchaseOrderByIdQuery request, CancellationToken cancellationToken)
    {
        var company = await _context.Company
            .AsNoTracking()
            .Include(x => x.Currency)
            .OrderByDescending(x => x.IsDefault)
            .FirstOrDefaultAsync(cancellationToken);

        return await _context.PurchaseOrder
            .AsNoTracking()
            .Include(x => x.Vendor)
            .Include(x => x.PurchaseOrderItemList)
            .ThenInclude(x => x.Product)
            .Where(x => x.Id == request.Id)
            .Select(x => new GetPurchaseOrderByIdResponse
            {
                Id = x.Id,
                AutoNumber = x.AutoNumber,
                OrderDate = x.OrderDate,
                OrderStatus = x.OrderStatus,
                Description = x.Description,
                VendorId = x.VendorId,
                VendorName = x.Vendor!.Name,
                VendorStreet = x.Vendor!.Street,
                VendorCity = x.Vendor!.City,
                VendorState = x.Vendor!.State,
                VendorZipCode = x.Vendor!.ZipCode,
                VendorPhone = x.Vendor!.PhoneNumber,
                VendorEmail = x.Vendor!.EmailAddress,
                VendorFax = x.Vendor!.FaxNumber,
                CompanyName = company != null ? company.Name : string.Empty,
                CompanyStreet = company != null ? company.StreetAddress : string.Empty,
                CompanyCity = company != null ? company.City : string.Empty,
                CompanyState = company != null ? company.StateProvince : string.Empty,
                CompanyZipCode = company != null ? company.ZipCode : string.Empty,
                CompanyPhone = company != null ? company.Phone : string.Empty,
                CompanyEmail = company != null ? company.Email : string.Empty,
                CurrencySymbol = company != null && company.Currency != null ? company.Currency.Symbol : "IDR",
                TaxId = x.TaxId,
                BeforeTaxAmount = x.BeforeTaxAmount,
                TaxAmount = x.TaxAmount,
                AfterTaxAmount = x.AfterTaxAmount,
                CreatedAt = x.CreatedAt,
                CreatedBy = x.CreatedBy,
                UpdatedAt = x.UpdatedAt,
                UpdatedBy = x.UpdatedBy,
                Items = x.PurchaseOrderItemList.Select(i => new PurchaseOrderItemResponse
                {
                    Id = i.Id,
                    ProductId = i.ProductId,
                    ProductName = i.Product!.Name,
                    Summary = i.Summary,
                    UnitPrice = i.UnitPrice,
                    Quantity = i.Quantity,
                    Total = i.Total
                }).ToList()
            }).FirstOrDefaultAsync(cancellationToken);
    }
}