ANTOOZA-BACKEND/Admin/Pages/Faq/List/Write.cshtml.cs

using SharedKernel.Extensions;
using Application.Abstractions.Messaging;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace Admin.Pages.Faq.List;

public class WriteModel(IMediator mediator) : PageModel
{
    public string? QueryString { get; set; }
    public List<SelectListItem> Categories { get; set; } = [];

    [BindProperty]
    public InputModel Input { get; set; } = new();

    public sealed class InputModel
    {
        [DisplayName("FAQ 분류")]
        [Required(ErrorMessage = "{0}는 필수입니다.")]
        public int CategoryID { get; set; }

        [DisplayName("질문")]
        [DataType(DataType.Text)]
        [Required(ErrorMessage = "{0}는 필수입니다.")]
        [StringLength(255, ErrorMessage = "{0}은 {1}자 이하로 입력하세요.")]
        public string Question { get; set; } = default!;

        [DisplayName("답변")]
        [DataType(DataType.Html)]
        public string? Answer { get; set; }

        [DisplayName("순서")]
        [Range(-9999, 9999, ErrorMessage = "{0}은 {1}에서 {2} 사이의 값이어야 합니다.")]
        public short Order { get; set; } = 0;

        [DisplayName("사용 여부")]
        public bool IsActive { get; set; } = false;
    }

    public async Task OnGetAsync(int? categoryID, CancellationToken ct)
    {
        QueryString = HttpContext.Request.QueryString.HasValue ? HttpContext.Request.QueryString.Value!.TrimStart('?') : "";

        Categories = (await mediator.Send(new GetFaqCategories.Query(), ct)).List
                    .Select(c => new SelectListItem
                    {
                        Value = c.ID.ToString(),
                        Text = $"[{c.Code}] {c.Subject}",
                        Selected = categoryID.HasValue && c.ID == categoryID.Value
                    })
                    .ToList();

        if (categoryID.HasValue)
        {
            Input.CategoryID = categoryID.Value;
        }
    }

    public async Task<IActionResult> OnPostAsync(CancellationToken ct)
    {
        try
        {
            if (!ModelState.IsValid)
            {
                throw new Exception(ModelState.GetErrorMessages());
            }

            var command = new CreateFaqItem.Command(
                Input.CategoryID,
                Input.Question,
                Input.Answer,
                Input.Order,
                Input.IsActive
            );

            await mediator.Send(command, ct);

            TempData["SuccessMessage"] = $"{Input.Question} FAQ가 등록되었습니다.";

            return RedirectToPage("/Faq/List/Index");
        }
        catch (Exception e)
        {
            TempData["ErrorMessages"] = e.Message;

            return Redirect($"/Faq/List/Write?{QueryString}");
        }
    }
}