everything/EveryThing/Pages/Invoices/Create.cshtml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using EveryThing.Data;
using EveryThing.Models;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Authorization;

namespace EveryThing.Pages.Invoices
{
    [Authorize(Roles = "Administrator,InvoicingUser,ProjecThingUser")]
    public class CreateModel : PageModel
    {
        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityApplicationUser> _userManager;
        private readonly SignInManager<IdentityApplicationUser> _loginManager;
        private readonly RoleManager<IdentityApplicationRole> _roleManager;

        public CreateModel(ApplicationDbContext context, UserManager<IdentityApplicationUser> userManager, SignInManager<IdentityApplicationUser> loginManager, RoleManager<IdentityApplicationRole> roleManager)
        {
            _context = context;
            _userManager = userManager;
            _loginManager = loginManager;
            _roleManager = roleManager;
        }

        public IActionResult OnGet(int type)
        {
            var user = _userManager.GetUserAsync(User).Result;

            ViewData["Type"] = type;
            ViewData["IdPartnerFk"] = new SelectList(_context.CodeTablePartners.Where(x => x.IdCompanyFk == user.IdCompanyFk && x.Active), "IdPartner", "Title");

            Invoice = new Models.Invoice.Invoice
            {
                PreText = "",
                PostText = ""
            };

            return Page();
        }

        [BindProperty]
        public Models.Invoice.Invoice Invoice { get; set; }

        // To protect from overposting attacks, please enable the specific properties you want to bind to, for
        // more details see https://aka.ms/RazorPagesCRUD.
        public async Task<IActionResult> OnPostAsync(int type)
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }

            var user = _userManager.GetUserAsync(User).Result;
            var invoice = Invoice;

            SetNewInvoice(user.IdCompanyFk, (Models.Invoice.Invoice.InvoiceType)type, ref invoice, _context);
            invoice.PostText = invoice.PostText.Replace("<div><br></div>", "");
            invoice.PreText = invoice.PreText.Replace("<div><br></div>", "");

            _context.Invoices.Add(invoice);
            await _context.SaveChangesAsync();

            return RedirectToPage("./Edit", new { id = invoice.IdInvoice });
        }

        public static void SetNewInvoice(int idCompany, Models.Invoice.Invoice.InvoiceType type, ref Models.Invoice.Invoice invoice, ApplicationDbContext context)
        {
            var year = DateTime.Now.Year;
            invoice.InvoiceYear = year;
            invoice.State = Models.Invoice.Invoice.InvoiceState.New;
            invoice.Type = type;

            var items = context.Invoices
                .Where(x => x.IdCompanyFk == idCompany
                        && x.InvoiceYear == year
                        && x.Type == type).ToList();


            invoice.InvoiceNumber = items == null || items.Count <= 0 ? 1 : items.Max(x => x.InvoiceNumber) + 1;
            invoice.IdCompanyFk = idCompany;
        }
    }
}