marechai/Marechai/Areas/Admin/Controllers/DocumentCompaniesController.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;

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

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

        // GET: DocumentCompanies
        public async Task<IActionResult> Index() => View(await _context.
                                                               DocumentCompanies.OrderBy(c => c.Name).
                                                               Select(d => new DocumentCompanyViewModel
                                                               {
                                                                   Id        = d.Id, Name = d.Name,
                                                                   Company   = d.Company.Name,
                                                                   CompanyId = d.CompanyId
                                                               }).ToListAsync());

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

            DocumentCompanyViewModel documentCompany =
                await _context.DocumentCompanies.Select(d => new DocumentCompanyViewModel
                {
                    Id = d.Id, Name = d.Name, Company = d.Company.Name, CompanyId = d.CompanyId
                }).FirstOrDefaultAsync(m => m.Id == id);

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

            return View(documentCompany);
        }

        // GET: DocumentCompanies/Create
        public IActionResult Create()
        {
            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name).Select(c => new
            {
                c.Id, c.Name
            }), "Id", "Name");

            return View();
        }

        // POST: DocumentCompanies/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("Name,CompanyId,Id")] DocumentCompany documentCompany)
        {
            if(!ModelState.IsValid)
                return View(documentCompany);

            _context.Add(documentCompany);
            await _context.SaveChangesAsync();

            return RedirectToAction(nameof(Index));
        }

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

            DocumentCompany documentCompany = await _context.DocumentCompanies.FindAsync(id);

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

            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name).Select(c => new
            {
                c.Id, c.Name
            }), "Id", "Name", documentCompany.CompanyId);

            return View(documentCompany);
        }

        // POST: DocumentCompanies/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(int id, [Bind("Name,CompanyId,Id")] DocumentCompany documentCompany)
        {
            if(id != documentCompany.Id)
                return NotFound();

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

                    throw;
                }

                return RedirectToAction(nameof(Index));
            }

            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name).Select(c => new
            {
                c.Id, c.Name
            }), "Id", "Name", documentCompany.CompanyId);

            return View(documentCompany);
        }

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

            DocumentCompanyViewModel documentCompany =
                await _context.DocumentCompanies.Select(d => new DocumentCompanyViewModel
                {
                    Id = d.Id, Name = d.Name, Company = d.Company.Name, CompanyId = d.CompanyId
                }).FirstOrDefaultAsync(m => m.Id == id);

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

            return View(documentCompany);
        }

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

            return RedirectToAction(nameof(Index));
        }

        bool DocumentCompanyExists(int id) => _context.DocumentCompanies.Any(e => e.Id == id);
    }
}