Notes

using System;
using System.Collections.Generic;
using System.Formats.Asn1;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.EntityFrameworkCore;
using CSharp.MVCAdminPanel.Data;
using CSharp.MVCAdminPanel.Models;

namespace CSharp.MVCAdminPanel.Areas.Admin.Controllers
{
[Area("Admin")]
public class PostsController : Controller
{
private readonly ApplicationDbContext _context;

public PostsController(ApplicationDbContext context)
{
_context = context;
}

// GET: Admin/Posts
public async Task<IActionResult> Index()
{
var AdminPanelContext = _context.Posts
.Include(p => p.Category)
.Include(p => p.PostPopularTags)
.ThenInclude(p => p.PopularTag)
.AsNoTracking()
.ToListAsync();
return View(await AdminPanelContext);
}

// GET: Admin/Posts/Details/5
public async Task<IActionResult> Details(int? id)
{
if (id == null)
{
return NotFound();
}

var post = await _context.Posts
.Include(p => p.Category)
.FirstOrDefaultAsync(m => m.Id == id);
if (post == null)
{
return NotFound();
}

return View(post);
}

// GET: Admin/Posts/Create
public IActionResult Create()
{
ViewData["CategoryId"] = new SelectList(_context.Categories, "Id", "Title");
ViewData["PostPopularTags"] = new SelectList(_context.PopularTags, "Id", "Title");

return View();
}

// POST: Admin/Posts/Create
// To protect from overposting attacks, enable the specific properties you want to bind to.
// For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("Title,Content,ImageUrl,PublishDate,CategoryId,Category,Id")] Post post, int[] PostPopularTags)
{
if (ModelState.IsValid)
{
if (PostPopularTags.Length > 0)
{
var tags = PostPopularTags.Select(t => new PopularTagPost() { PopularTagId = t }).ToList();
post.PostPopularTags = tags;
}

_context.Add(post);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));


}

ViewData["CategoryId"] = new SelectList(_context.Categories, "Id", "Title", post.CategoryId);
ViewData["PostPopularTags"] = new SelectList(_context.PopularTags, "Id", "Title");

return View(post);
}

// GET: Admin/Posts/Edit/5
public async Task<IActionResult> Edit(int? id)
{
if (id == null)
{
return NotFound();
}

var post = await _context.Posts
.Include(p => p.Category)
.Include(p => p.PostPopularTags)
.ThenInclude(pt => pt.PopularTag).FirstOrDefaultAsync(p => p.Id == id);
if (post == null)
{
return NotFound();
}
ViewData["CategoryId"] = new SelectList(_context.Categories, "Id", "Title", post.CategoryId);
ViewData["CategoryId"] = new SelectList(_context.Categories, "Id", "Title", post.PostPopularTags);

return View(post);
}

// POST: Admin/Posts/Edit/5
// To protect from overposting attacks, enable the specific properties you want to bind to.
// For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Edit(int id, [Bind("Title,Content,ImageUrl,PublishDate,CategoryId,Id")] Post post)
{
if (id != post.Id)
{
return NotFound();
}

if (ModelState.IsValid)
{
try
{
_context.Update(post);
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!PostExists(post.Id))
{
return NotFound();
}
else
{
throw;
}
}
return RedirectToAction(nameof(Index));
}
ViewData["CategoryId"] = new SelectList(_context.Categories, "Id", "Title", post.CategoryId);
return View(post);
}

// GET: Admin/Posts/Delete/5
public async Task<IActionResult> Delete(int? id)
{
if (id == null)
{
return NotFound();
}

var post = await _context.Posts
.Include(p => p.Category)
.FirstOrDefaultAsync(m => m.Id == id);
if (post == null)
{
return NotFound();
}

return View(post);
}

// POST: Admin/Posts/Delete/5
[HttpPost, ActionName("Delete")]
[ValidateAntiForgeryToken]
public async Task<IActionResult> DeleteConfirmed(int id)
{
var post = await _context.Posts.FindAsync(id);
if (post != null)
{
_context.Posts.Remove(post);
}

await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}

private bool PostExists(int id)
{
return _context.Posts.Any(e => e.Id == id);
}
}
}