EFB/Controllers/ChartsController.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using EFB.Models;
using EFB.Controllers.Form;
using EFB.Sessions;

namespace EFB.Controllers
{
    //[Route("[controller]")]
    public class ChartsController : Controller
    {
        private readonly ILogger<ChartsController> _logger;

        public ChartsController(ILogger<ChartsController> logger)
        {
            _logger = logger;
        }

        public async Task<IActionResult> Index(string ICAO)
        {
            if(ICAO == null)
                return View();

            if (FormAuthenticator.ValidateICAOCode(ICAO))
            {
                var charts = await ChartModel.FetchAsync(ICAO);
                if (charts != null)
                {
                    ChartModel chartModel = new ChartModel(charts);
                    // return ViewCharts(chartModel);
                    HttpContext.Session.SetObject("Charts", chartModel);
                    return RedirectToAction("ViewCharts");
                }
            }else
            {
                TempData["Error"] = "Invalid ICAO";
            }
            return View();
        }

        public IActionResult ViewCharts(){
            ChartModel charts = HttpContext.Session.GetObject<ChartModel>("Charts");
            if (charts != null)
            {
                return View("ViewCharts", charts);
            }
            return RedirectToAction("Index");
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View("Error!");
        }
    }
}