Leaderboards

The purpose of this feature is to allow players to see and participate in score-based Leaderboards.

Leaderboards provide competitive ranking systems that encourage player engagement and retention by displaying player performance relative to others.

Leaderboards API

Submiting Score

Here is a snippet from the sample LeaderboardFlowInterpolationExample.cs:

private async void SetupBeamable()
{
    _beamContext = BeamContext.Default;
    await _beamContext.OnReady;
    Debug.Log($"_beamContext.PlayerId = {_beamContext.PlayerId}");

    LeaderboardContent leaderboardContent = 
    await _leaderboardMainMenuCustom.LeaderboardBehavior.Leaderboard.Resolve();

    Debug.Log($"PopulateLeaderboard Starting. Wait < 30 seconds... ");
    int leaderboardRowCountMin = 10;
    int leaderboardScoreMin = 99;
    int leaderboardScoreMax = 99999;

    // Populate with custom values 
    Dictionary<string, object> leaderboardStats = new Dictionary<string, object>();
    leaderboardStats.Add("leaderboard_score_timestamp", new 
    DateTimeOffset(DateTime.UtcNow).ToUnixTimeMilliseconds());
    leaderboardStats.Add("leaderboard_score_velocity", 99); // 99 score delta per second

    // Populates mock "alias" and "score" for each leaderboard row
    string loggingResult = await MockDataCreator.PopulateLeaderboardWithMockData(
    _beamContext, 
    leaderboardContent,
    leaderboardRowCountMin,
    leaderboardScoreMin,
    leaderboardScoreMax,
    leaderboardStats);

    Debug.Log($"PopulateLeaderboard Finish. Result = {loggingResult}");
}

Rendering Score

Here is a snippet from the sample LeaderboardItemCustom.cs:

public void Update()
{
    // Prepare value
    long scoreTimestamp = long.Parse(_rankEntry.GetStat("leaderboard_score_timestamp"));
    long scoreVelocity = long.Parse(_rankEntry.GetStat("leaderboard_score_velocity"));
    long currentTimestamp = new DateTimeOffset(DateTime.UtcNow).ToUnixTimeMilliseconds();
    long millisecondsSinceSubmission = currentTimestamp - scoreTimestamp;
    long scoreSinceSubmission = (millisecondsSinceSubmission * scoreVelocity) / 1000;

    // Render value
    double score = _rankEntry.score + scoreSinceSubmission;
    TxtScore.text = $"{score:00000}";
}

Getting Board

When calling either GetBoard or GetAssignedBoard, the parameters share the following semantics:

Parameter	Description
leaderBoard/boardId	The board whose subset of rank entries you want to retrieve. • For the partitioned case (GetAssignedBoard), it'll always return you the partition containing the requesting/authenticated user.
from	Is the first "rank" you want to retrieve. This parameter is ignored if a focus is given. • If this value is greater than the lowest rank, you'll get no RankEntries back: if there are 10 entries in the board and you pass in from=15, you'll get an empty array of RankEntries in your LeaderBoardView.
max	Is the number of ranks, starting from from, and moving towards the lowest rank that you want to retrieve. • As in, if from=20 and max=10, you'll get ranks [20~30]. • If there are not enough entries to fill this amount, the search is truncated.
focus	is a User's PlayerId that'll be used as the middle RankEntry of the resulting LeaderBoardView. • Takes max/2 ranks above the focus and max/2 ranks from below the focus. • It is inclusive. As in, if focus is at rank 50 and you pass in max=10, you should see [40~61]. • If there are not enough entries in the leaderboard either above or below you, the corresponding max/2 will be truncated.
outlier	A GamerTag whose RankEntry is guaranteed to be included. When this is passed in, the resulting entry is stored in LeaderBoardView.rankgt.

Here is a snippet from LeaderboardServiceExample.cs:

private async Task<List<RankEntry>> LeaderboardServiceGetBoard(string id, long userId)
{
    LeaderBoardView leaderBoardView = await _beamContext.Api.LeaderboardService.GetBoard(id, 0, 100, 
    userId);

    foreach (RankEntry rankEntry in leaderBoardView.rankings)
    {
        // Get alias for userId of rankEntry
        long nextUserId = rankEntry.gt;
        var stats = 
                await _beamContext.Api.StatsService.GetStats("client", "public", "player", nextUserId );

        string alias = "";
        stats.TryGetValue(alias, out alias);
        if (string.IsNullOrEmpty(alias))
        {
            alias = "Unknown Alias";
        }

        // Log
        Debug.Log($"Rank = {rankEntry.rank}, Alias = {alias}, Score = {rankEntry.score}");
    }

    return leaderBoardView.rankings;
}

WebGL Sample

You can try out this feature in the interactive WebGL demo: Unity WebGL Player - Leaderboard Flow Example