bitforum-backend/Admin/Pages/Config/Meta.cshtml.cs

using Application.Features.Config;
using Application.Features.Config.Commands;
using Application.Features.Config.Queries;
using MediatR;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;

namespace Admin.Pages.Config
{
    public class MetaModel(IMediator mediator) : PageModel
    {
        [BindProperty]
        public InputModel Input { get; set; } = new();

        public async Task OnGetAsync(CancellationToken cancellationToken)
        {
            var config = await mediator.Send(new GetConfigQuery(), cancellationToken);
            if (config is not null)
            {
                Input = InputModel.From(config);
            }
        }

        public async Task<IActionResult> OnPostAsync(CancellationToken cancellationToken)
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }

            await mediator.Send(Input.ToCommand(), cancellationToken);

            return RedirectToPage();
        }

        public sealed class InputModel
        {
            public ConfigDto.MetaConfigDto Meta { get; set; } = new();

            public static InputModel From(ConfigDto config)
            {
                return new()
                {
                    Meta = config.Meta
                };
            }

            public UpdateConfigCommand ToCommand()
            {
                return new(
                    null,
                    null,
                    Meta
                );
            }
        }
    }
}