Nullable refernce types refactoring

WotBlitzStatisticsPro.Logic/AccountInformationPipeline/Operations/GetTanksInfoOperation.cs

@@ -1,12 +1,13 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using AutoMapper;
+using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.DataAccess.Model.Accounts;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.OperationContext;
 using WotBlitzStatisticsPro.Logic.Pipeline;
 using WotBlitzStatisticsPro.WgApiClient;
-using WotBlitzStatisticsPro.WgApiClient.Model;
 
 namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
 {
@@ -14,26 +15,36 @@ namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
     {
         private readonly IWargamingTanksApiClient _wargamingApi;
         private readonly IMapper _mapper;
+        private readonly ILogger<GetTanksInfoOperation> _logger;
 
         public GetTanksInfoOperation(
             IWargamingTanksApiClient wargamingApi,
-            IMapper mapper)
+            IMapper mapper,
+            ILogger<GetTanksInfoOperation> logger)
         {
             _wargamingApi = wargamingApi;
             _mapper = mapper;
+            _logger = logger;
         }
 
-        public async Task Invoke(IOperationContext context, Func<IOperationContext, Task> next)
+        public async Task Invoke(IOperationContext context, Func<IOperationContext, Task>? next)
         {
             var contextData = context.Get<AccountInformationPipelineContextData>();
 
             var tanksInfo = await
                 _wargamingApi.GetPlayerAccountTanksInfo(context.Request.AccountId, context.Request.RealmType, context.Request.RequestLanguage);
 
+            if (tanksInfo == null)
+            {
+                _logger.LogInformation(
+                    $"Tanks not found for AccountId {context.Request.AccountId} and {context.Request.RealmType} realm");
+                return;
+            }
+
             contextData.Tanks = new List<TankInfo>();
             contextData.TanksHistory = new Dictionary<long, TankInfoHistory>();
 
-            tanksInfo.ForEach(tank =>
+            tanksInfo.OrderByDescending(t => t.LastBattleTime).ToList().ForEach(tank =>
             {
                 var tankInfo = new TankInfo(tank.AccountId, tank.TankId);
                 _mapper.Map(tank, tankInfo);
@@ -43,7 +54,7 @@ namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
                 contextData.TanksHistory[stat.TankId] = stat;
             });
 
-            await next.Invoke(context);
+            if (next != null) await next.Invoke(context);
         }
     }
 }