components/LiteCharms.Features/ShoppingCarts/Queries/Handlers/GetShoppingCartQueryHandler.cs

using LiteCharms.Extensions;
using LiteCharms.Infrastructure.Database;
using LiteCharms.Models;

namespace LiteCharms.Features.ShoppingCarts.Queries.Handlers;

public class GetShoppingCartQueryHandler(IDbContextFactory<ShopDbContext> contextFactory) : IRequestHandler<GetShoppingCartQuery, Result<ShoppingCart>>
{
    public async ValueTask<Result<ShoppingCart>> Handle(GetShoppingCartQuery request, CancellationToken cancellationToken)
    {
		try
		{
            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);

            var cart = await context.ShoppingCarts.AsNoTracking().FirstOrDefaultAsync(c => c.Id == request.ShoppingCartId, cancellationToken);

            return cart is not null
                ? Result.Ok(cart.ToModel())
                : Result.Fail<ShoppingCart>($"Failed to find shopping cart with id {request.ShoppingCartId}");
        }
		catch (Exception ex)
		{
            return Result.Fail<ShoppingCart>(new Error(ex.Message).CausedBy(ex));
        }
    }
}