marechai/Marechai/Areas/Admin/Controllers/ResolutionsByGpuController.cs

using System.Linq;
using System.Threading.Tasks;
using Marechai.Areas.Admin.Models;
using Marechai.Database.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Query;

namespace Marechai.Areas.Admin.Controllers
{
    [Area("Admin"), Authorize]
    public class ResolutionsByGpuController : Controller
    {
        readonly MarechaiContext _context;

        public ResolutionsByGpuController(MarechaiContext context) => _context = context;

        // GET: ResolutionsByGpu
        public async Task<IActionResult> Index()
        {
            IIncludableQueryable<ResolutionsByGpu, Resolution> marechaiContext =
                _context.ResolutionsByGpu.Include(r => r.Gpu).Include(r => r.Resolution);

            return View(await marechaiContext.OrderBy(r => r.Gpu.Company.Name).ThenBy(r => r.Gpu.Name).
                                              ThenBy(r => r.Resolution.Chars).ThenBy(r => r.Resolution.Width).
                                              ThenBy(r => r.Resolution.Height).ThenBy(r => r.Resolution.Colors).
                                              Select(r => new ResolutionsByGpuViewModel
                                              {
                                                  Gpu        = r.Gpu.Name, GpuCompany = r.Gpu.Company.Name, Id = r.Id,
                                                  Resolution = r.Resolution
                                              }).ToListAsync());
        }

        // GET: ResolutionsByGpu/Details/5
        public async Task<IActionResult> Details(long? id)
        {
            if(id == null)
                return NotFound();

            ResolutionsByGpu resolutionsByGpu = await _context.
                                                      ResolutionsByGpu.Include(r => r.Gpu).Include(r => r.Resolution).
                                                      FirstOrDefaultAsync(m => m.Id == id);

            if(resolutionsByGpu == null)
                return NotFound();

            return View(resolutionsByGpu);
        }

        // GET: ResolutionsByGpu/Create
        public IActionResult Create()
        {
            ViewData["GpuId"] = new SelectList(_context.Gpus.OrderBy(r => r.Company.Name).ThenBy(r => r.Name).
                                                        Select(g => new
                                                        {
                                                            g.Id, Name = $"{g.Company.Name} {g.Name}"
                                                        }), "Id", "Name");

            ViewData["ResolutionId"] = new SelectList(_context.Resolutions.OrderBy(r => r.Chars).ThenBy(r => r.Width).
                                                               ThenBy(r => r.Height).ThenBy(r => r.Colors).
                                                               Select(r => new
                                                               {
                                                                   r.Id, Name = r.ToString()
                                                               }), "Id", "Name");

            return View();
        }

        // POST: ResolutionsByGpu/Create
        // To protect from overposting attacks, please 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("GpuId,ResolutionId,Id")] ResolutionsByGpu resolutionsByGpu)
        {
            if(ModelState.IsValid)
            {
                _context.Add(resolutionsByGpu);
                await _context.SaveChangesAsync();

                return RedirectToAction(nameof(Index));
            }

            ViewData["GpuId"] = new SelectList(_context.Gpus.OrderBy(r => r.Company.Name).ThenBy(r => r.Name).
                                                        Select(g => new
                                                        {
                                                            g.Id, Name = $"{g.Company.Name} {g.Name}"
                                                        }), "Id", "Name", resolutionsByGpu.GpuId);

            ViewData["ResolutionId"] = new SelectList(_context.Resolutions.OrderBy(r => r.Chars).ThenBy(r => r.Width).
                                                               ThenBy(r => r.Height).ThenBy(r => r.Colors).
                                                               Select(r => new
                                                               {
                                                                   r.Id, Name = r.ToString()
                                                               }), "Id", "Name", resolutionsByGpu.ResolutionId);

            return View(resolutionsByGpu);
        }

        // GET: ResolutionsByGpu/Edit/5
        public async Task<IActionResult> Edit(long? id)
        {
            if(id == null)
                return NotFound();

            ResolutionsByGpu resolutionsByGpu = await _context.ResolutionsByGpu.FindAsync(id);

            if(resolutionsByGpu == null)
                return NotFound();

            ViewData["GpuId"] = new SelectList(_context.Gpus.OrderBy(r => r.Company.Name).ThenBy(r => r.Name).
                                                        Select(g => new
                                                        {
                                                            g.Id, Name = $"{g.Company.Name} {g.Name}"
                                                        }), "Id", "Name", resolutionsByGpu.GpuId);

            ViewData["ResolutionId"] = new SelectList(_context.Resolutions.OrderBy(r => r.Chars).ThenBy(r => r.Width).
                                                               ThenBy(r => r.Height).ThenBy(r => r.Colors).
                                                               Select(r => new
                                                               {
                                                                   r.Id, Name = r.ToString()
                                                               }), "Id", "Name", resolutionsByGpu.ResolutionId);

            return View(resolutionsByGpu);
        }

        // POST: ResolutionsByGpu/Edit/5
        // To protect from overposting attacks, please 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(
            long id, [Bind("GpuId,ResolutionId,Id")] ResolutionsByGpu resolutionsByGpu)
        {
            if(id != resolutionsByGpu.Id)
                return NotFound();

            if(ModelState.IsValid)
            {
                try
                {
                    _context.Update(resolutionsByGpu);
                    await _context.SaveChangesAsync();
                }
                catch(DbUpdateConcurrencyException)
                {
                    if(!ResolutionsByGpuExists(resolutionsByGpu.Id))
                        return NotFound();

                    throw;
                }

                return RedirectToAction(nameof(Index));
            }

            ViewData["GpuId"] = new SelectList(_context.Gpus.OrderBy(r => r.Company.Name).ThenBy(r => r.Name).
                                                        Select(g => new
                                                        {
                                                            g.Id, Name = $"{g.Company.Name} {g.Name}"
                                                        }), "Id", "Name", resolutionsByGpu.GpuId);

            ViewData["ResolutionId"] = new SelectList(_context.Resolutions.OrderBy(r => r.Chars).ThenBy(r => r.Width).
                                                               ThenBy(r => r.Height).ThenBy(r => r.Colors).
                                                               Select(r => new
                                                               {
                                                                   r.Id, Name = r.ToString()
                                                               }), "Id", "Name", resolutionsByGpu.ResolutionId);

            return View(resolutionsByGpu);
        }

        // GET: ResolutionsByGpu/Delete/5
        public async Task<IActionResult> Delete(long? id)
        {
            if(id == null)
                return NotFound();

            ResolutionsByGpu resolutionsByGpu = await _context.
                                                      ResolutionsByGpu.Include(r => r.Gpu).Include(r => r.Resolution).
                                                      FirstOrDefaultAsync(m => m.Id == id);

            if(resolutionsByGpu == null)
                return NotFound();

            return View(resolutionsByGpu);
        }

        // POST: ResolutionsByGpu/Delete/5
        [HttpPost, ActionName("Delete"), ValidateAntiForgeryToken]
        public async Task<IActionResult> DeleteConfirmed(long id)
        {
            ResolutionsByGpu resolutionsByGpu = await _context.ResolutionsByGpu.FindAsync(id);
            _context.ResolutionsByGpu.Remove(resolutionsByGpu);
            await _context.SaveChangesAsync();

            return RedirectToAction(nameof(Index));
        }

        bool ResolutionsByGpuExists(long id) => _context.ResolutionsByGpu.Any(e => e.Id == id);

        [AcceptVerbs("Get", "Post")]
        public async Task<IActionResult> VerifyUnique(int gpuId, int resolutionId) =>
            await _context.ResolutionsByGpu.FirstOrDefaultAsync(i => i.GpuId == gpuId && i.ResolutionId == resolutionId)
                is null ? Json(true) : Json("The selected GPU already has the selected resolution.");
    }
}