components/LiteCharms.Features/Shop/Customers/Queries/Handlers/GetCustomerQueryHandler.cs

using LiteCharms.Extensions;
using LiteCharms.Features.Shop.Customers.Models;
using LiteCharms.Features.Shop.Postgres;

namespace LiteCharms.Features.Customers.Queries.Handlers;

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

            var customer = await context.Customers.FirstOrDefaultAsync(c => c.Id == request.CustomerId, cancellationToken);

            return customer is not null
                ? Result.Ok(customer.ToModel())
                : Result.Fail<Customer>($"Customer not found with id {request.CustomerId}");
        }
		catch (Exception ex)
		{
            return Result.Fail<Customer>(new Error(ex.Message).CausedBy(ex));
        }
    }
}