Check when list is null and campaign details doesn't exist

Author: christian147

src/Web/WebMVC/Controllers/CampaignsController.cs

@@ -2,9 +2,9 @@ namespace Microsoft.eShopOnContainers.WebMVC.Controllers
 {
     using Microsoft.AspNetCore.Authorization;
     using Microsoft.AspNetCore.Mvc;
+    using Microsoft.eShopOnContainers.WebMVC.Models;
     using Microsoft.eShopOnContainers.WebMVC.Services;
     using Microsoft.eShopOnContainers.WebMVC.ViewModels;
-    using System;
     using System.Collections.Generic;
     using System.Threading.Tasks;
 
@@ -18,7 +18,14 @@ public CampaignsController(ICampaignService campaignService) =>
 
         public async Task<IActionResult> Index()
         {
-            var campaignList = await _campaignService.GetCampaigns();
+            var campaignDtoList = await _campaignService.GetCampaigns();
+
+            if(campaignDtoList is null)
+            {
+                return View();
+            }
+
+            var campaignList = MapCampaignModelListToDtoList(campaignDtoList);
 
             return View(campaignList);
         }
@@ -27,6 +34,11 @@ public async Task<IActionResult> Details(int id)
         {
             var campaignDto = await _campaignService.GetCampaignById(id);
 
+            if (campaignDto is null)
+            {
+                return NotFound();
+            }
+
             var campaign = new Campaign
             {
                 Id = campaignDto.Id,
@@ -39,5 +51,30 @@ public async Task<IActionResult> Details(int id)
 
             return View(campaign);
         }
+
+        private List<Campaign> MapCampaignModelListToDtoList(IEnumerable<CampaignDTO> campaignDtoList)
+        {
+            var campaignList = new List<Campaign>();
+
+            foreach(var campaignDto in campaignDtoList)
+            {
+                campaignList.Add(MapCampaignDtoToModel(campaignDto));
+            }
+
+            return campaignList;
+        }
+
+        private Campaign MapCampaignDtoToModel(CampaignDTO campaign)
+        {
+            return new Campaign
+            {
+                Id = campaign.Id,
+                Name = campaign.Name,
+                Description = campaign.Description,
+                From = campaign.From,
+                To = campaign.To,
+                PictureUri = campaign.PictureUri
+            };
+        }
     }
 }