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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;
using CoreWiki.Models;
using Htmx;
using Microsoft.AspNetCore.Http.HttpResults;
using NodaTime;
namespace CoreWiki.Pages
{
public class DetailsModel : PageModel
{
private readonly IClock _clock;
private readonly ApplicationDbContext _context;
public DetailsModel(ApplicationDbContext context, IClock clock)
{
_clock = clock;
_context = context;
}
private const int CommentsPerPage = 10;
public Article Article { get; set; } = default!;
[BindProperty] public Comment Comment { get; set; }
public async Task<IActionResult> OnGetAsync(string? slug, [FromQuery] int? pageNumber)
{
slug ??= "home-page";
var pagesToSkip = CommentsPerPage * ((pageNumber ?? 1) - 1);
var article = await _context.Articles
.Include(a => a.Comments
.OrderByDescending(c => c.SubmittedDateTime)
.Skip(pagesToSkip)
.Take(CommentsPerPage))
.FirstOrDefaultAsync(a => a.Slug == slug);
if (article == null)
{
return NotFound();
}
Article = article;
if (Request.Cookies[Article.Slug] == null)
{
Article.ViewCount++;
Response.Cookies.Append(Article.Slug, "viewed", new CookieOptions()
{
Expires = DateTime.UtcNow.AddMinutes(5)
});
await _context.SaveChangesAsync();
}
if (Request.IsHtmx() && !Request.IsHtmxBoosted())
{
return Partial("_commentsList", new ArticleCommentListViewModel
{
Comments = Article.Comments,
Slug = slug,
PageNumber = pageNumber ?? 1
});
}
return Page();
}
public async Task<IActionResult> OnPostAsync(string? slug)
{
slug ??= "home-page";
var article = await _context.Articles.FirstOrDefaultAsync(a => a.Slug == slug);
if (article == null)
{
return NotFound();
}
Article = article;
ModelState.Remove("Comment.Article");
if (!ModelState.IsValid)
{
if (Request.IsHtmx() && !Request.IsHtmxBoosted())
{
return Partial("_commentsForm", this);
}
return Page();
}
Comment.Submitted = _clock.GetCurrentInstant();
article.Comments.Add(Comment);
await _context.SaveChangesAsync();
if (Request.IsHtmx() && !Request.IsHtmxBoosted())
{
Response.Htmx(h => { h.WithTrigger("commentsChanged"); });
Comment.DisplayName = String.Empty;
Comment.EMail = String.Empty;
Comment.Content = String.Empty;
ModelState.Clear();
return Partial("_commentsForm", this);
}
return RedirectToPage("Details", new { slug = slug == "home-page" ? "" : slug });
}
}
}
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