feat: introduced caching in the server + Added serilog

WotBlitzStatisticsPro.Blazor/graphql/schema.graphql

@@ -24,7 +24,7 @@ type Mutation {
   "Updates the necessary dictionaries in database.\n\n\n**Returns:**\nInformation about what was updated."
   updateDictionaries("Determines what dictionaries should be updated." updateDictionariesRequest: UpdateDictionariesRequestInput!): [UpdateDictionariesResponseItem!]!
   "Gathers all account information"
-  gatherAccountInformation("Account region" realmType: RealmType! "AccountId" accountId: Long! "Request language" requestLanguage: RequestLanguage!): AccountInfoResponse!
+  gatherAccountInformation("Account region" realmType: RealmType! "AccountId" accountId: Long! "Request language" requestLanguage: RequestLanguage!): DateTime!
   "This method accepts GitHub oauth code, and returns JWT token with GutHub user as claim"
   gitHubAuthenticate("OAuth code can be generated by this URL https:\/\/github.com\/login\/oauth\/authorize?client_id={yourClientId}" oauthCode: String!): String!
 }

WotBlitzStatisticsPro.GraphQl/Mutation/WotBlitzStatisticsMutation.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System;
+using System.Threading.Tasks;
 using HotChocolate;
 using HotChocolate.AspNetCore.Authorization;
 using HotChocolate.Types;
@@ -43,7 +44,7 @@ namespace WotBlitzStatisticsPro.GraphQl.Mutation
         /// <param name="requestLanguage">Request language</param>
         /// <param name="wgToken">Wargaming authentication token</param>
         /// <returns></returns>
-        public Task<AccountInfoResponse> GatherAccountInformation(
+        public Task<DateTime> GatherAccountInformation(
             RealmType realmType, 
             long accountId, 
             RequestLanguage requestLanguage,

WotBlitzStatisticsPro.GraphQl/Program.cs

@@ -1,5 +1,9 @@
+using System;
+using System.IO;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
+using Serilog;
 
 namespace WotBlitzStatisticsPro.GraphQl
 {
@@ -7,12 +11,36 @@ namespace WotBlitzStatisticsPro.GraphQl
 	{
 		public static void Main(string[] args)
 		{
-			CreateHostBuilder(args).Build().Run();
+            var configuration = new ConfigurationBuilder()
+                .SetBasePath(Directory.GetCurrentDirectory())
+                .AddJsonFile("appsettings.json")
+                .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", true)
+                .AddEnvironmentVariables()
+                .Build();
+
+            Log.Logger = new LoggerConfiguration()
+                .ReadFrom.Configuration(configuration)
+                .CreateLogger();
+
+            try
+            {
+                Log.Information("Starting web host");
+                CreateHostBuilder(args).Build().Run();
+            }
+            catch (Exception ex)
+            {
+                Log.Fatal(ex, "Host terminated unexpectedly");
+            }
+            finally
+            {
+                Log.CloseAndFlush();
+            }
 		}
 
-		public static IHostBuilder CreateHostBuilder(string[] args) =>
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
 			Host.CreateDefaultBuilder(args)
-				.ConfigureWebHostDefaults(webBuilder =>
+                .UseSerilog()
+                .ConfigureWebHostDefaults(webBuilder =>
 				{
 					webBuilder.UseStartup<Startup>();
 				});

WotBlitzStatisticsPro.GraphQl/Query/WotBlitzStatisticsQuery.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using HotChocolate.Types;
+using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.Logic;
 

WotBlitzStatisticsPro.GraphQl/Startup.cs

@@ -14,6 +14,7 @@ using Microsoft.Extensions.Diagnostics.HealthChecks;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.IdentityModel.Tokens;
+using Serilog;
 using WotBlitzStatisticsPro.Common;
 using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.GraphQl.GitHubOauth;
@@ -37,7 +38,10 @@ namespace WotBlitzStatisticsPro.GraphQl
 
 		public void ConfigureServices(IServiceCollection services)
 		{
-			var wgApiConfig = new WargamingApiSettings();
+            //services.AddLogging(loggingBuilder =>
+            //    loggingBuilder.AddSerilog(dispose: true));
+
+            var wgApiConfig = new WargamingApiSettings();
 			Configuration.GetSection("WargamingApi").Bind(wgApiConfig);
 
 			var mongoConfig = new MongoSettings();

WotBlitzStatisticsPro.GraphQl/WotBlitzStatisticsPro.GraphQl.csproj

@@ -17,6 +17,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="5.0.4" />
     <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="6.10.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="Serilog.AspNetCore" Version="4.1.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.10.0" />
   </ItemGroup>
 

WotBlitzStatisticsPro.GraphQl/appsettings.Development.json

@@ -1,9 +1,25 @@
 {
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft": "Warning",
-      "Microsoft.Hosting.Lifetime": "Information"
+    "Logging": {
+        "LogLevel": {
+            "Default": "Information",
+            "Microsoft": "Warning",
+            "Microsoft.Hosting.Lifetime": "Information"
+        }
+    },
+    "Serilog": {
+        "Using": [ "Serilog.Sinks.Console" ],
+        "MinimumLevel": {
+            "Default": "Debug",
+            "Override": {
+                "Microsoft": "Warning",
+                "Microsoft.Hosting.Lifetime": "Information",
+                "System": "Warning"
+            }
+
+        },
+        "WriteTo": [
+            { "Name": "Console" }
+        ],
+        "Enrich": [ "FromLogContext" ]
     }
-  }
 }

WotBlitzStatisticsPro.GraphQl/appsettings.Production.json

@@ -0,0 +1,17 @@
+{
+    "Serilog": {
+        "Using": [ "Serilog.Sinks.Console" ],
+        "MinimumLevel": {
+            "Default": "Information",
+            "Override": {
+                "Microsoft": "Warning",
+                "Microsoft.Hosting.Lifetime": "Information",
+                "System": "Warning"
+            }
+        },
+        "WriteTo": [
+            { "Name": "Console" }
+        ],
+        "Enrich": [ "FromLogContext" ]
+    }
+}

WotBlitzStatisticsPro.GraphQl/appsettings.json

@@ -14,9 +14,30 @@
 	"Mongo": {
 		"ConnectionString": "*",
 		"DatabaseName": "*"
-	}, 
+	},
 	"GitHubOAuth": {
 		"ClientId": "YourClientId",
-		"ClientSecret":  "YourSecret" 
-    }
-}
+		"ClientSecret": "YourSecret"
+	},
+	"Serilog": {
+		"Using": [ "Serilog.Sinks.Console" ],
+		"MinimumLevel": {
+			"Default": "Information",
+			"Override": {
+				"Microsoft": "Warning",
+				"Microsoft.Hosting.Lifetime": "Information",
+				"System": "Warning"
+			}
+		},
+		"WriteTo": [
+			{
+				"Name": "Console",
+				"Args": {
+					"theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console",
+					"outputTemplate": "{Timestamp:HH:mm:ss.fff} [{Level:u3}] {Message:lj} |{SourceContext}|{NewLine}{Exception}"
+				}
+			}
+		],
+		"Enrich": [ "FromLogContext" ]
+	}
+}

WotBlitzStatisticsPro.Logic/AccountInformationPipeline/Operations/GetAccountInfoOperation.cs

@@ -4,6 +4,7 @@ using AutoMapper;
 using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.DataAccess.Model.Accounts;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.OperationContext;
+using WotBlitzStatisticsPro.Logic.Model;
 using WotBlitzStatisticsPro.Logic.Pipeline;
 using WotBlitzStatisticsPro.WgApiClient;
 using WotBlitzStatisticsPro.WgApiClient.Model;
@@ -15,19 +16,36 @@ namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
         private readonly IWargamingApiClient _wargamingApi;
         private readonly IMapper _mapper;
         private readonly ILogger<GetAccountInfoOperation> _logger;
+        private readonly StatisticsCache _cache;
 
         public GetAccountInfoOperation(
             IWargamingApiClient wargamingApi,
             IMapper mapper,
-            ILogger<GetAccountInfoOperation> logger)
+            ILogger<GetAccountInfoOperation> logger,
+            StatisticsCache cache)
         {
             _wargamingApi = wargamingApi;
             _mapper = mapper;
             _logger = logger;
+            _cache = cache;
         }
 
         public async Task Invoke(IOperationContext context, Func<IOperationContext, Task>? next)
         {
+            // Store info to AccountInfo and in AccountInfoHistory
+            var contextData = context.Get<AccountInformationPipelineContextData>();
+
+            var cache = _cache.GetAccountData(context.Request.AccountId);
+            if (cache != null)
+            {
+                contextData.AccountInfo = cache.AccountInfo;
+                contextData.AccountInfoHistory = cache.AccountInfoHistory;
+                _logger.LogInformation($"Account data for account {context.Request.AccountId} got from cache");
+
+                if (next != null) await next.Invoke(context);
+                return;
+            }
+
             var accountInfo = await 
                 _wargamingApi.GetPlayerAccountInfo(context.Request.AccountId, context.Request.RealmType, context.Request.RequestLanguage, context.Request.AuthenticationToken);
 
@@ -38,14 +56,14 @@ namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
                 return;
             }
 
-            // Store info to AccountInfo and in AccountInfoHistory
-            var contextData = context.Get<AccountInformationPipelineContextData>();
             contextData.AccountInfo = _mapper.Map<WotAccountInfo, AccountInfo>(accountInfo);
             contextData.AccountInfo.Realm = context.Request.RealmType;
 
             contextData.AccountInfoHistory = new AccountInfoHistory(context.Request.AccountId, contextData.AccountInfo.LastBattleTime);
             _mapper.Map(accountInfo.Statistics?.All, contextData.AccountInfoHistory);
 
+            _cache.SetAccountData(context.Request.AccountId, new AccountDataCache(contextData.AccountInfo, contextData.AccountInfoHistory));
+
             if (next != null) await next.Invoke(context);
         }
     }

WotBlitzStatisticsPro.Logic/AccountInformationPipeline/Operations/GetTanksInfoOperation.cs

@@ -6,6 +6,7 @@ using AutoMapper;
 using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.DataAccess.Model.Accounts;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.OperationContext;
+using WotBlitzStatisticsPro.Logic.Model;
 using WotBlitzStatisticsPro.Logic.Pipeline;
 using WotBlitzStatisticsPro.WgApiClient;
 
@@ -16,21 +17,36 @@ namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
         private readonly IWargamingTanksApiClient _wargamingApi;
         private readonly IMapper _mapper;
         private readonly ILogger<GetTanksInfoOperation> _logger;
+        private readonly StatisticsCache _cache;
 
         public GetTanksInfoOperation(
             IWargamingTanksApiClient wargamingApi,
             IMapper mapper,
-            ILogger<GetTanksInfoOperation> logger)
+            ILogger<GetTanksInfoOperation> logger,
+            StatisticsCache cache)
         {
             _wargamingApi = wargamingApi;
             _mapper = mapper;
             _logger = logger;
+            _cache = cache;
         }
 
         public async Task Invoke(IOperationContext context, Func<IOperationContext, Task>? next)
         {
             var contextData = context.Get<AccountInformationPipelineContextData>();
 
+            var cache = _cache.GetTanksData(context.Request.AccountId);
+            if (cache != null)
+            {
+                contextData.Tanks = cache.TankInfo;
+                contextData.TanksHistory = cache.TankInfoHistory;
+                _logger.LogInformation($"Account tanks data for account {context.Request.AccountId} got from cache");
+
+                if (next != null) await next.Invoke(context);
+                return;
+            }
+
+
             var tanksInfo = await
                 _wargamingApi.GetPlayerAccountTanksInfo(context.Request.AccountId, context.Request.RealmType, context.Request.RequestLanguage);
 
@@ -54,6 +70,8 @@ namespace WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations
                 contextData.TanksHistory[stat.TankId] = stat;
             });
 
+            _cache.SetTanksData(context.Request.AccountId, new TanksDataCache(contextData.Tanks, contextData.TanksHistory));
+
             if (next != null) await next.Invoke(context);
         }
     }

WotBlitzStatisticsPro.Logic/IWargamingAccounts.cs

@@ -8,7 +8,7 @@ namespace WotBlitzStatisticsPro.Logic
     {
         Task<AccountInfoResponse> GatherAccountInformation(RealmType realm, long accountId, RequestLanguage requestLanguage);
 
-        Task<AccountInfoResponse> GatherAndSaveAccountInformation(RealmType realm, long accountId, RequestLanguage requestLanguage, string wargamingToken);
+        Task<DateTime> GatherAndSaveAccountInformation(RealmType realm, long accountId, RequestLanguage requestLanguage, string wargamingToken);
 
         Task<AccountInfoHistoryResponse> GetAccountInfoHistory(RealmType realm, long accountId, DateTime startDate,
             RequestLanguage requestLanguage);

WotBlitzStatisticsPro.Logic/Model/AccountDataCache.cs

@@ -0,0 +1,17 @@
+using WotBlitzStatisticsPro.DataAccess.Model.Accounts;
+
+namespace WotBlitzStatisticsPro.Logic.Model
+{
+    public class AccountDataCache
+    {
+        public AccountDataCache(AccountInfo accountInfo, AccountInfoHistory accountInfoHistory)
+        {
+            AccountInfo = accountInfo;
+            AccountInfoHistory = accountInfoHistory;
+        }
+
+        public AccountInfo AccountInfo { get; }
+
+        public AccountInfoHistory AccountInfoHistory { get; }
+    }
+}

WotBlitzStatisticsPro.Logic/Model/CacheItem.cs

@@ -0,0 +1,28 @@
+using System;
+
+namespace WotBlitzStatisticsPro.Logic.Model
+{
+    public class CacheItem<T>
+    {
+        private const int ExpirationTimeoutInMinutes = 60;
+        private DateTime? _lastRefreshed = null;
+
+        private T? _itemData = default(T);
+
+        public long AccountId { get; set; }
+
+        public bool IsExpired => _lastRefreshed != null &&
+                                 (DateTime.Now - _lastRefreshed.Value).TotalMinutes > ExpirationTimeoutInMinutes;
+
+        public T? Data
+        {
+            get => _itemData;
+            set
+            {
+                _itemData = value;
+                _lastRefreshed = DateTime.Now;
+
+            }
+        }
+    }
+}

WotBlitzStatisticsPro.Logic/Model/StatisticsCache.cs

@@ -0,0 +1,84 @@
+using System.Collections.Generic;
+
+namespace WotBlitzStatisticsPro.Logic.Model
+{
+    public class StatisticsCache
+    {
+        private readonly Dictionary<long, CacheItem<AccountDataCache>> _accountsCache = new();
+        private readonly Dictionary<long, CacheItem<TanksDataCache>> _tanksCache = new();
+
+        public AccountDataCache? GetAccountData(long accountId)
+        {
+            if (!_accountsCache.ContainsKey(accountId) || _accountsCache[accountId].IsExpired)
+            {
+                return null;
+            }
+
+            return _accountsCache[accountId].Data;
+        }
+
+        public TanksDataCache? GetTanksData(long accountId)
+        {
+            if (!_tanksCache.ContainsKey(accountId) || _tanksCache[accountId].IsExpired)
+            {
+                return null;
+            }
+
+            return _tanksCache[accountId].Data;
+        }
+
+        public void SetAccountData(long accountId, AccountDataCache data)
+        {
+            if (!_accountsCache.ContainsKey(accountId))
+            {
+                _accountsCache.Add(accountId, new CacheItem<AccountDataCache>());
+                ClearExpiredAccounts();
+            }
+            _accountsCache[accountId].Data = data;
+        }
+
+        public void SetTanksData(long accountId, TanksDataCache data)
+        {
+            if (!_tanksCache.ContainsKey(accountId))
+            {
+                _tanksCache.Add(accountId, new CacheItem<TanksDataCache>());
+                ClearExpiredTanks();
+            }
+            _tanksCache[accountId].Data = data;
+        }
+
+        private void ClearExpiredAccounts()
+        {
+            var expired = new List<long>();
+            foreach (var cacheItem in _accountsCache)
+            {
+                if (cacheItem.Value.IsExpired)
+                {
+                    expired.Add(cacheItem.Key);
+                }
+            }
+
+            foreach (var expiredKey in expired)
+            {
+                _accountsCache.Remove(expiredKey);
+            }
+        }
+
+        private void ClearExpiredTanks()
+        {
+            var expired = new List<long>();
+            foreach (var cacheItem in _tanksCache)
+            {
+                if (cacheItem.Value.IsExpired)
+                {
+                    expired.Add(cacheItem.Key);
+                }
+            }
+
+            foreach (var expiredKey in expired)
+            {
+                _accountsCache.Remove(expiredKey);
+            }
+        }
+    }
+}

WotBlitzStatisticsPro.Logic/Model/TanksDataCache.cs

@@ -0,0 +1,18 @@
+using System.Collections.Generic;
+using WotBlitzStatisticsPro.DataAccess.Model.Accounts;
+
+namespace WotBlitzStatisticsPro.Logic.Model
+{
+    public class TanksDataCache
+    {
+        public TanksDataCache(List<TankInfo> tankInfo, Dictionary<long, TankInfoHistory> tankInfoHistory)
+        {
+            TankInfo = tankInfo;
+            TankInfoHistory = tankInfoHistory;
+        }
+
+        public List<TankInfo> TankInfo { get; }
+
+        public Dictionary<long, TankInfoHistory> TankInfoHistory { get; }
+    }
+}

WotBlitzStatisticsPro.Logic/WargamingAccounts.cs

@@ -5,6 +5,7 @@ using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.OperationContext;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations;
+using WotBlitzStatisticsPro.Logic.Calculations;
 using WotBlitzStatisticsPro.Logic.Pipeline;
 
 namespace WotBlitzStatisticsPro.Logic
@@ -58,7 +59,7 @@ namespace WotBlitzStatisticsPro.Logic
             return contextData?.Response ?? new AccountInfoResponse();
         }
 
-        public async Task<AccountInfoResponse> GatherAndSaveAccountInformation(
+        public async Task<DateTime> GatherAndSaveAccountInformation(
             RealmType realm, 
             long accountId, 
             RequestLanguage requestLanguage,
@@ -78,7 +79,6 @@ namespace WotBlitzStatisticsPro.Logic
                     .AddOperation<GetTanksInfoOperation>()
                     .AddOperation<CalculateStatisticsOperation>()
                     .AddOperation<SaveAccountAndTanksOperation>()
-                    .AddOperation<BuildAccountInfoResponseOperation>()
                     ;
 
                 var firstOperation = pipeline.Build();
@@ -95,7 +95,7 @@ namespace WotBlitzStatisticsPro.Logic
 
                 throw;
             }
-            return contextData?.Response ?? new AccountInfoResponse();
+            return contextData?.AccountInfo?.LastBattleTime.ToDateTime() ?? new DateTime(1970,1,1);
         }
 
         public async Task<AccountInfoHistoryResponse> GetAccountInfoHistory(RealmType realm, long accountId, DateTime startDate, RequestLanguage requestLanguage)

WotBlitzStatisticsPro.Logic/WotBlitzStatisticsLogicInstaller.cs

@@ -7,6 +7,7 @@ using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.DataAccess;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations;
 using WotBlitzStatisticsPro.Logic.Dictionaries;
+using WotBlitzStatisticsPro.Logic.Model;
 using WotBlitzStatisticsPro.Logic.Pipeline;
 using WotBlitzStatisticsPro.WgApiClient;
 
@@ -19,6 +20,7 @@ namespace WotBlitzStatisticsPro.Logic
 
         public static void ConfigureServices(IServiceCollection services)
         {
+            services.AddSingleton<StatisticsCache>();
             ConfigureDictionariesFactory(services);
             ConfigureOperationsFactory(services);
             WotBlitzStatisticsDataAccessInstaller.ConfigureServices(services);

WotBlitzStatisticsPro.Tests/OperationStepsTests/GetAccountInfoOperationTest.cs

@@ -9,6 +9,7 @@ using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.OperationContext;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations;
+using WotBlitzStatisticsPro.Logic.Model;
 
 namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
 {
@@ -17,16 +18,19 @@ namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
     {
         private GetAccountInfoOperation _operation;
         private AccountInformationPipelineContextData _contextData;
+        private StatisticsCache _cache;
 
         [SetUp]
         public void Init()
         {
             InitAutoMapper();
             InitWgApiClient();
+            _cache = new StatisticsCache();
             _operation = new GetAccountInfoOperation(
                 WargamingApiClient,
                 Mapper,
-                (new Mock<ILogger<GetAccountInfoOperation>>()).Object);
+                (new Mock<ILogger<GetAccountInfoOperation>>()).Object,
+                _cache);
 
             _contextData = new AccountInformationPipelineContextData();
         }
@@ -51,6 +55,21 @@ namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
             var expectedAccountInfoHistory =
                 await File.ReadAllTextAsync(GetFixturePath("MappedAccountHistory.json"));
             accountInfoHistorySerialized.Should().Be(expectedAccountInfoHistory);
+
+            // ToDo: Check cache
+            Assert.Fail("Implement test");
+        }
+
+        [Test]
+        public async Task ShouldGetAndSaveAccountInfoInformationIfCacheExpired()
+        {
+            Assert.Fail("Implement test");
+        }
+
+        [Test]
+        public async Task ShouldReadDataFromCacheIfItIsNotEmpty()
+        {
+            Assert.Fail("Implement test");
         }
     }
 }

WotBlitzStatisticsPro.Tests/OperationStepsTests/GetTanksInfoOperationTest.cs

@@ -8,6 +8,7 @@ using NUnit.Framework;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.OperationContext;
 using WotBlitzStatisticsPro.Logic.AccountInformationPipeline.Operations;
+using WotBlitzStatisticsPro.Logic.Model;
 
 namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
 {
@@ -16,16 +17,21 @@ namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
     {
         private GetTanksInfoOperation _operation;
         private AccountInformationPipelineContextData _contextData;
+        private StatisticsCache _cache;
+
 
         [SetUp]
         public void Init()
         {
             InitAutoMapper();
             InitWgApiClient();
+            _cache = new StatisticsCache();
+
             _operation = new GetTanksInfoOperation(
                 WargamingTanksApiClient,
                 Mapper,
-                (new Mock<ILogger<GetTanksInfoOperation>>()).Object);
+                (new Mock<ILogger<GetTanksInfoOperation>>()).Object,
+                _cache);
 
             _contextData = new AccountInformationPipelineContextData();
         }
@@ -50,6 +56,21 @@ namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
             var expectedTanksHistory =
                 await File.ReadAllTextAsync(GetFixturePath("MappedTanksHistory.json"));
             tanksHistorySerialized.Should().Be(expectedTanksHistory);
+
+            // ToDo: Check cache
+            Assert.Fail("Implement test");
+        }
+
+        [Test]
+        public async Task ShouldGetAndSaveTankInfoInformationIfCacheExpired()
+        {
+            Assert.Fail("Implement test");
+        }
+
+        [Test]
+        public async Task ShouldReadDataFromCacheIfItIsNotEmpty()
+        {
+            Assert.Fail("Implement test");
         }
 
     }

WotBlitzStatisticsPro.Tests/OperationStepsTests/OperationsStepsTestBase.cs

@@ -7,6 +7,7 @@ using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
 using AutoMapper;
+using Microsoft.Extensions.Logging;
 using Moq;
 using Moq.Protected;
 using Newtonsoft.Json;
@@ -97,7 +98,10 @@ namespace WotBlitzStatisticsPro.Tests.OperationStepsTests
                     ItExpr.IsAny<CancellationToken>())
                 .ReturnsAsync(tanksInfoResponse);
 
-            var client  = new WargamingApiClient(new HttpClient(handlerMock.Object), settingsMock.Object);
+            var client  = new WargamingApiClient(
+                new HttpClient(handlerMock.Object), 
+                settingsMock.Object,
+                (new Mock<ILogger<WagramingApiClientBase>>()).Object);
             WargamingApiClient = client;
             WargamingTanksApiClient = client;
         }

WotBlitzStatisticsPro.WgApiClient/WagramingApiClientBase.cs

@@ -6,6 +6,7 @@ using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Text;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.Common;
 using WotBlitzStatisticsPro.Common.Model;
 
@@ -19,14 +20,17 @@ namespace WotBlitzStatisticsPro.WgApiClient
 
 		private readonly HttpClient _httpClient;
 		private readonly IWargamingApiSettings _wargamingApiSettings;
+        private readonly ILogger<WagramingApiClientBase> _logger;
 
-		public WagramingApiClientBase(
+        public WagramingApiClientBase(
 			HttpClient httpClient,
-			IWargamingApiSettings wargamingApiSettings)
+			IWargamingApiSettings wargamingApiSettings,
+            ILogger<WagramingApiClientBase> logger)
 		{
 			_httpClient = httpClient;
 			_wargamingApiSettings = wargamingApiSettings;
-			_blitzApiUrls[RealmType.Eu] = "https://api.wotblitz.eu/wotb/";
+            _logger = logger;
+            _blitzApiUrls[RealmType.Eu] = "https://api.wotblitz.eu/wotb/";
 			_blitzApiUrls[RealmType.Ru] = "https://api.wotblitz.ru/wotb/";
 			_blitzApiUrls[RealmType.Na] = "https://api.wotblitz.com/wotb/";
 			_blitzApiUrls[RealmType.Asia] = "https://api.wotblitz.asia/wotb/";
@@ -53,6 +57,9 @@ namespace WotBlitzStatisticsPro.WgApiClient
 			var responseString = await response.Content.ReadAsStringAsync();
 
 			var responseBody = JsonConvert.DeserializeObject<ResponseBody<T>>(responseString);
+
+			_logger.LogInformation($"HTTP GET {uri} - {responseBody.Status}");
+
 			switch (responseBody.Status)
             {
                 case "ok":

WotBlitzStatisticsPro.WgApiClient/WargamingAchievementsApiClient.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Net.Http;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.Common;
 using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.WgApiClient.Model;
@@ -10,7 +11,10 @@ namespace WotBlitzStatisticsPro.WgApiClient
     public class WargamingAchievementsApiClient: WagramingApiClientBase,
         IWargamingAchievementsApiClient
     {
-        public WargamingAchievementsApiClient(HttpClient httpClient, IWargamingApiSettings wargamingApiSettings) : base(httpClient, wargamingApiSettings)
+        public WargamingAchievementsApiClient(
+            HttpClient httpClient, 
+            IWargamingApiSettings wargamingApiSettings, 
+            ILogger<WagramingApiClientBase> logger) : base(httpClient, wargamingApiSettings, logger)
         {
         }
 

WotBlitzStatisticsPro.WgApiClient/WargamingApiClient.cs

@@ -2,6 +2,7 @@
 using System.Linq;
 using System.Net.Http;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
 using WotBlitzStatisticsPro.Common;
 using WotBlitzStatisticsPro.Common.Model;
 using WotBlitzStatisticsPro.WgApiClient.Model;
@@ -15,7 +16,8 @@ namespace WotBlitzStatisticsPro.WgApiClient
     {
 		public WargamingApiClient(
 			HttpClient httpClient,
-			IWargamingApiSettings wargamingApiSettings) : base(httpClient, wargamingApiSettings)
+			IWargamingApiSettings wargamingApiSettings,
+            ILogger<WagramingApiClientBase> logger) : base(httpClient, wargamingApiSettings, logger)
 		{
 		}
 

WotBlitzStatisticsPro.WgApiClient/WotBlitzStatisticsPro.WgApiClient.csproj

@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="5.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
   </ItemGroup>