blazor-scm/Features/Purchase/PurchaseOrder/Cqrs/DeletePurchaseOrderItemHandler.cs

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

namespace Indotalent.Features.Purchase.PurchaseOrder.Cqrs;

public record DeletePurchaseOrderItemCommand(string Id) : IRequest<bool>;

public class DeletePurchaseOrderItemHandler : IRequestHandler<DeletePurchaseOrderItemCommand, bool>
{
    private readonly AppDbContext _context;
    public DeletePurchaseOrderItemHandler(AppDbContext context) => _context = context;

    public async Task<bool> Handle(DeletePurchaseOrderItemCommand request, CancellationToken cancellationToken)
    {
        var entity = await _context.PurchaseOrderItem
            .FirstOrDefaultAsync(x => x.Id == request.Id, cancellationToken);

        if (entity == null) return false;

        var orderId = entity.PurchaseOrderId;

        _context.PurchaseOrderItem.Remove(entity);
        await _context.SaveChangesAsync(cancellationToken);

        if (!string.IsNullOrEmpty(orderId))
        {
            PurchaseOrderHelper.Recalculate(_context, orderId);
        }

        return true;
    }
}