ANTOOZA-BACKEND/Admin/Pages/Config/Payment/Index.cshtml.cs

using Application.Abstractions.Messaging;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;

namespace Admin.Pages.Config.Payment;

public class IndexModel(IMediator mediator) : PageModel
{
    [BindProperty]
    public InputModel Input { get; set; } = new();

    /// <summary>저장된 키 존재 여부 — 화면에는 키 원문/암호문을 노출하지 않고 placeholder 로만 표시</summary>
    public GetConfig.Response.TossConfigDto KeyState { get; set; } = new();

    public async Task OnGetAsync(CancellationToken ct)
    {
        var config = await mediator.Send(new GetConfig.Query(), ct);
        if (config is not null)
        {
            Input = InputModel.From(config);
            KeyState = config.Toss;
        }
    }

    public async Task<IActionResult> OnPostAsync(CancellationToken ct)
    {
        if (!ModelState.IsValid)
        {
            var config = await mediator.Send(new GetConfig.Query(), ct);
            if (config is not null)
            {
                KeyState = config.Toss;
            }

            return Page();
        }

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

        TempData["SuccessMessage"] = "저장되었습니다.";
        return RedirectToPage();
    }

    public sealed class InputModel
    {
        public UpdateConfig.Request.TossConfigDto Toss { get; set; } = new();

        public static InputModel From(GetConfig.Response config)
        {
            var req = UpdateConfig.Request.From(config);

            return new()
            {
                Toss = req.Toss ?? new()
            };
        }

        public UpdateConfig.Command ToCommand()
        {
            return new(
                Toss: Toss
            );
        }
    }
}