ANTOOZA-BACKEND/Admin/Pages/Forum/Posts/List/Edit.cshtml.cs

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

namespace Admin.Pages.Forum.Posts.List;

public class EditModel(IMediator mediator) : PageModel
{
    [BindProperty]
    public string? QueryString { get; set; }

    public string? ReturnUrl { get; set; }

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

    public string? CurrentThumbnail { get; private set; }
    public bool IsQnA { get; set; }
    public List<(int ID, string FileName, string Url, string? Extension, long? Size, int Downloads)> ExistingFiles { get; set; } = [];
    public List<(int TagID, string Name)> ExistingTags { get; set; } = [];

    public sealed class InputModel
    {
        [DisplayName("ID")]
        [Required(ErrorMessage = "{0}은 필수입니다.")]
        public int ID { get; set; }

        public int BoardID { get; set; }

        [DisplayName("말머리")]
        public int? BoardPrefixID { get; set; }

        [DisplayName("제목")]
        [Required(ErrorMessage = "{0}은 필수입니다.")]
        [StringLength(255, ErrorMessage = "{0}은 {1}자 이내로 입력하세요.")]
        public string Subject { get; set; } = null!;

        [DisplayName("내용")]
        public string? Content { get; set; }

        [DisplayName("대표 이미지")]
        [AllowedExtensions("jpg,jpeg,png,gif,webp,bmp", ErrorMessage = "이미지 파일은 jpg, jpeg, png, gif, webp, bmp 형식이어야 합니다.")]
        public IFormFile? ThumbnailFile { get; set; }

        [DisplayName("첨부파일")]
        [AllowedExtensions("jpg,jpeg,png,gif,webp,bmp,pdf,doc,docx,xls,xlsx,ppt,pptx,txt,zip,rar,7z,hwp,hwpx,csv", ErrorMessage = "첨부 파일은 허용된 형식이어야 합니다.")]
        public List<IFormFile>? Files { get; set; }

        [DisplayName("태그")]
        public string? TagsInput { get; set; }

        [DisplayName("공지")]
        public bool IsNotice { get; set; } = false;

        [DisplayName("비밀")]
        public bool IsSecret { get; set; } = false;

        [DisplayName("익명")]
        public bool IsAnonymous { get; set; } = false;

        public string? ReturnUrl { get; set; }
    }

    public async Task OnGetAsync(int id, CancellationToken ct)
    {
        var postResult = await mediator.Send(new GetPost.Query(id), ct);
        if (postResult.IsFailure)
        {
            TempData["ErrorMessages"] = postResult.Error.Description;
            QueryString = Request.QueryString.ToString();
            return;
        }

        var result = postResult.Value;

        CurrentThumbnail = result.Thumbnail;
        IsQnA = result.IsQnA;
        var referer = Request.Headers.Referer.ToString();
        ReturnUrl = string.IsNullOrWhiteSpace(referer) ? null : referer;

        Input = new InputModel
        {
            ID = result.ID,
            BoardID = result.BoardID,
            BoardPrefixID = result.BoardPrefixID,
            Subject = result.Subject,
            Content = result.Content,
            IsNotice = result.IsNotice,
            IsSecret = result.IsSecret,
            IsAnonymous = result.IsAnonymous,
            TagsInput = result.Tags.Count > 0 ? string.Join(", ", result.Tags.Select(t => t.Name)) : null,
            ReturnUrl = ReturnUrl
        };

        ExistingFiles = [..result.Files.Where(f => !f.IsDisabled).Select(f => (f.ID, f.FileName, f.Url, f.Extension, f.Size, f.Downloads))];
        ExistingTags = [..result.Tags.Select(t => (t.TagID, t.Name))];

        QueryString = Request.QueryString.ToString();
    }

    public async Task<IActionResult> OnGetPrefixesAsync(int id, int boardID, CancellationToken ct)
    {
        var result = await mediator.Send(new GetBoardPrefixes.Query(boardID), ct);
        var items = result.List.Where(c => c.IsActive).Select(c => new { id = c.ID, name = c.Name });
        return new JsonResult(items);
    }

    public async Task<IActionResult> OnPostAsync(CancellationToken ct)
    {
        if (!ModelState.IsValid)
        {
            TempData["ErrorMessages"] = ModelState.GetErrorMessages();
            return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{GetCleanQueryString()}");
        }

        var tags = string.IsNullOrWhiteSpace(Input.TagsInput)
            ? null
            : Input.TagsInput.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries).ToList();

        var result = await mediator.Send(new UpdatePost.Command(
            Input.ID,
            Input.BoardPrefixID,
            Input.Subject,
            Input.Content,
            Input.ThumbnailFile,
            Input.Files,
            tags,
            Input.IsNotice,
            Input.IsSecret,
            Input.IsAnonymous
        ), ct);

        if (result.IsFailure)
        {
            TempData["ErrorMessages"] = result.Error.Description;
        }
        else
        {
            TempData["SuccessMessage"] = "게시글이 수정되었습니다.";
        }

        return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{GetCleanQueryString()}");
    }

    public async Task<IActionResult> OnPostDeleteThumbnailAsync(CancellationToken ct)
    {
        var result = await mediator.Send(new DeletePostThumbnail.Command(Input.ID), ct);
        if (result.IsFailure)
        {
            TempData["ErrorMessages"] = result.Error.Description;
        }
        else
        {
            TempData["SuccessMessage"] = "대표 이미지가 삭제되었습니다.";
        }

        return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{GetCleanQueryString()}");
    }

    public async Task<IActionResult> OnPostDeleteFileAsync(int fileID, CancellationToken ct)
    {
        try
        {
            await mediator.Send(new DeletePostFile.Command([fileID]), ct);
            TempData["SuccessMessage"] = "첨부파일이 삭제되었습니다.";
        }
        catch (Exception e)
        {
            TempData["ErrorMessages"] = e.Message;
        }

        return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{GetCleanQueryString()}");
    }

    public async Task<IActionResult> OnPostDeleteAsync(CancellationToken ct)
    {
        try
        {
            await mediator.Send(new DeletePost.Command([Input.ID]), ct);

            TempData["SuccessMessage"] = "게시글이 삭제되었습니다.";

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

            return Redirect($"/Forum/Posts/List/Edit/{Input.ID}{GetCleanQueryString()}");
        }
    }

    private string GetCleanQueryString()
    {
        var query = QueryHelpers.ParseQuery(Request.QueryString.ToString());
        query.Remove("handler");
        query.Remove("fileID");

        if (query.Count == 0)
        {
            return string.Empty;
        }

        var pairs = query.SelectMany(kvp => kvp.Value, (kvp, v) => $"{Uri.EscapeDataString(kvp.Key)}={Uri.EscapeDataString(v ?? "")}");
        return "?" + string.Join("&", pairs);
    }
}