Put it all together - Stat tracking and display - (Unreal Engine module)

Last updated on September 9, 2024

Connect the UI to display player statistics​

  1. Open the the StatsProfileWidget_Starter class CPP file. Replace the QueryLocalUserStats() function with the code below. This function collects the statistics codes for all game modes and the queries them to get a player's statistics value list. Once the query is complete, it will call the OnQueryLocalUserStatsComplete() function to display the statistics.

    void UStatsProfileWidget_Starter::QueryLocalUserStats()
    {
        UAccelByteWarsGameInstance* GameInstance = Cast<UAccelByteWarsGameInstance>(GetGameInstance());
        if (!GameInstance) 
        {
            UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to query local user stats. Game instance is invalid."));
            Ws_Loader->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Error);
            return;
        }

        TArray<FString> StatsCodes{};
        for (const TTuple<FName, UDynamicEntryBox*>& EntryList : StatsDataEntryList)
        {
            FGameStatsData StatsData{};
            if (GameInstance->GetGameStatsDataById(EntryList.Key, StatsData)) 
            {
                StatsCodes.Append(StatsData.GetStatsCodes());
            }
        }

        if (StatsCodes.IsEmpty())
        {
            UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to query local user stats. No statistics code to query."));
            Ws_Loader->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Empty);
            return;
        }

        const bool bStarted = StatsEssentialsSubsystem->QueryLocalUserStats(
            AccelByteWarsUtility::GetLocalUserNum(GetOwningPlayer()),
            StatsCodes,
            FOnlineStatsQueryUsersStatsComplete::CreateUObject(this, &ThisClass::OnQueryLocalUserStatsComplete));

        Ws_Loader->SetWidgetState(bStarted ? EAccelByteWarsWidgetSwitcherState::Loading : EAccelByteWarsWidgetSwitcherState::Error);
    }

  2. Still in the same file, replace the OnQueryLocalUserStatsComplete() function with the code below. This function display the statistics values to the respective Dynamic Entry Box based on game modes. If a specific statistic is not found, a 0 value will be displayed. If no statistics are found, an empty state will be displayed.

    void UStatsProfileWidget_Starter::OnQueryLocalUserStatsComplete(
        const FOnlineError& ResultState,
        const TArray<TSharedRef<const FOnlineStatsUserStats>>& UsersStatsResult)
    {
        if (!ResultState.bSucceeded)
        {
            UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to handle on-complete query local user stats. Error: %s"), *ResultState.ErrorMessage.ToString());
            Ws_Loader->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Error);
            return;
        }

        UAccelByteWarsGameInstance* GameInstance = Cast<UAccelByteWarsGameInstance>(GetGameInstance());
        if (!GameInstance)
        {
            UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to handle on-complete query local user stats. Game instance is invalid."));
            Ws_Loader->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Error);
            return;
        }

        FUniqueNetIdPtr UserId = AccelByteWarsUtility::GetUserId(GetOwningPlayer());
        if (!UserId.IsValid())
        {
            UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to handle on-complete query local user stats. User id is invalid."));
            Ws_Loader->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Error);
            return;
        }

        // Get stats for the target user.
        TSharedPtr<const FOnlineStatsUserStats> TargetUserStats = nullptr;
        for (TSharedRef<const FOnlineStatsUserStats> const& UserStats : UsersStatsResult)
        {
            if (UserStats.Get().Account.Get() == UserId.ToSharedRef().Get())
            {
                TargetUserStats = UserStats;
                break;
            }
        }
        if (!TargetUserStats) 
        {
            UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to handle on-complete query local user stats. Local user's statistics is not found."));
            Ws_Loader->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Empty);
            return;
        }

        // Generate stats entries.
        for (const TTuple<FName, UDynamicEntryBox*>& EntryList : StatsDataEntryList)
        {
            FGameStatsData StatsData{};
            TWeakObjectPtr<UDynamicEntryBox> TargetStatsList = EntryList.Value;
            if (!TargetStatsList.IsValid() || !GameInstance->GetGameStatsDataById(EntryList.Key, StatsData))
            {
                UE_LOG_STATSESSENTIALS(Warning, TEXT("Failed to handle on-complete query local user stats. Invalid properties to generate widget entry."));
                continue;
            }

            TargetStatsList->Reset(true);
            for (const FGameStatsModel& StatsModel : StatsData.GetStatsModels())
            {
                float StatsValue = 0;
                if (const FVariantData* Stats = TargetUserStats->Stats.Find(StatsModel.CodeName))
                {
                    Stats->GetValue(StatsValue);
                }

                const TWeakObjectPtr<UStatsProfileWidgetEntry> WidgetEntry = TargetStatsList->CreateEntry<UStatsProfileWidgetEntry>();
                WidgetEntry->Setup(StatsModel.DisplayName, FText::AsNumber(StatsValue));
            }
        }

        Ws_Loader->SetWidgetState(UsersStatsResult.IsEmpty() ? EAccelByteWarsWidgetSwitcherState::Empty : EAccelByteWarsWidgetSwitcherState::Not_Empty);
    }

  3. Now, compile your project and make sure there are no errors.

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