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osu-lazer/osu.Game/Screens/Select/Leaderboards/BeatmapLeaderboard.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
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#nullable disable
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
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using System.Threading;
using System.Threading.Tasks;
using osu.Framework.Allocation;
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using osu.Framework.Bindables;
using osu.Framework.Extensions;
using osu.Game.Beatmaps;
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using osu.Game.Database;
using osu.Game.Extensions;
using osu.Game.Online.API;
using osu.Game.Online.API.Requests;
using osu.Game.Online.Leaderboards;
using osu.Game.Rulesets;
using osu.Game.Rulesets.Mods;
using osu.Game.Scoring;
using Realms;
namespace osu.Game.Screens.Select.Leaderboards
{
public class BeatmapLeaderboard : Leaderboard<BeatmapLeaderboardScope, ScoreInfo>
{
public Action<ScoreInfo> ScoreSelected;
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private BeatmapInfo beatmapInfo;
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public BeatmapInfo BeatmapInfo
{
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get => beatmapInfo;
set
{
if (beatmapInfo == null && value == null)
return;
if (beatmapInfo?.Equals(value) == true)
return;
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beatmapInfo = value;
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RefetchScores();
}
}
private bool filterMods;
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/// <summary>
/// Whether to apply the game's currently selected mods as a filter when retrieving scores.
/// </summary>
public bool FilterMods
{
get => filterMods;
set
{
if (value == filterMods)
return;
filterMods = value;
RefetchScores();
}
}
[Resolved]
private ScoreManager scoreManager { get; set; }
[Resolved]
private IBindable<RulesetInfo> ruleset { get; set; }
[Resolved]
private IBindable<IReadOnlyList<Mod>> mods { get; set; }
[Resolved]
private IAPIProvider api { get; set; }
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[Resolved]
private RulesetStore rulesets { get; set; }
[Resolved]
private RealmAccess realm { get; set; }
private IDisposable scoreSubscription;
[BackgroundDependencyLoader]
private void load()
{
ruleset.ValueChanged += _ => RefetchScores();
mods.ValueChanged += _ =>
{
if (filterMods)
RefetchScores();
};
}
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protected override bool IsOnlineScope => Scope != BeatmapLeaderboardScope.Local;
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protected override APIRequest FetchScores(CancellationToken cancellationToken)
{
var fetchBeatmapInfo = BeatmapInfo;
var fetchRuleset = ruleset.Value ?? fetchBeatmapInfo.Ruleset;
if (fetchBeatmapInfo == null)
{
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SetErrorState(LeaderboardState.NoneSelected);
return null;
}
if (Scope == BeatmapLeaderboardScope.Local)
{
subscribeToLocalScores(fetchBeatmapInfo, cancellationToken);
return null;
}
if (api?.IsLoggedIn != true)
{
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SetErrorState(LeaderboardState.NotLoggedIn);
return null;
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}
if (!fetchRuleset.IsLegacyRuleset())
{
SetErrorState(LeaderboardState.RulesetUnavailable);
return null;
}
if (fetchBeatmapInfo.OnlineID <= 0 || fetchBeatmapInfo.Status <= BeatmapOnlineStatus.Pending)
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{
SetErrorState(LeaderboardState.BeatmapUnavailable);
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return null;
}
if (!api.LocalUser.Value.IsSupporter && (Scope != BeatmapLeaderboardScope.Global || filterMods))
{
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SetErrorState(LeaderboardState.NotSupporter);
return null;
}
IReadOnlyList<Mod> requestMods = null;
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if (filterMods && !mods.Value.Any())
// add nomod for the request
requestMods = new Mod[] { new ModNoMod() };
else if (filterMods)
requestMods = mods.Value;
var req = new GetScoresRequest(fetchBeatmapInfo, fetchRuleset, Scope, requestMods);
req.Success += r =>
{
scoreManager.OrderByTotalScoreAsync(r.Scores.Select(s => s.ToScoreInfo(rulesets, fetchBeatmapInfo)).ToArray(), cancellationToken)
.ContinueWith(task => Schedule(() =>
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{
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if (cancellationToken.IsCancellationRequested)
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return;
SetScores(task.GetResultSafely(), r.UserScore?.CreateScoreInfo(rulesets, fetchBeatmapInfo));
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}), TaskContinuationOptions.OnlyOnRanToCompletion);
};
return req;
}
protected override LeaderboardScore CreateDrawableScore(ScoreInfo model, int index) => new LeaderboardScore(model, index, IsOnlineScope)
{
Action = () => ScoreSelected?.Invoke(model)
};
protected override LeaderboardScore CreateDrawableTopScore(ScoreInfo model) => new LeaderboardScore(model, model.Position, false)
{
Action = () => ScoreSelected?.Invoke(model)
};
private void subscribeToLocalScores(BeatmapInfo beatmapInfo, CancellationToken cancellationToken)
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{
Debug.Assert(beatmapInfo != null);
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scoreSubscription?.Dispose();
scoreSubscription = null;
scoreSubscription = realm.RegisterForNotifications(r =>
r.All<ScoreInfo>().Filter($"{nameof(ScoreInfo.BeatmapInfo)}.{nameof(BeatmapInfo.ID)} == $0"
+ $" AND {nameof(ScoreInfo.Ruleset)}.{nameof(RulesetInfo.ShortName)} == $1"
+ $" AND {nameof(ScoreInfo.DeletePending)} == false"
, beatmapInfo.ID, ruleset.Value.ShortName), localScoresChanged);
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void localScoresChanged(IRealmCollection<ScoreInfo> sender, ChangeSet changes, Exception exception)
{
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if (cancellationToken.IsCancellationRequested)
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return;
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// This subscription may fire from changes to linked beatmaps, which we don't care about.
// It's currently not possible for a score to be modified after insertion, so we can safely ignore callbacks with only modifications.
if (changes?.HasCollectionChanges() == false)
return;
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var scores = sender.AsEnumerable();
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if (filterMods && !mods.Value.Any())
{
// we need to filter out all scores that have any mods to get all local nomod scores
scores = scores.Where(s => !s.Mods.Any());
}
else if (filterMods)
{
// otherwise find all the scores that have *any* of the currently selected mods (similar to how web applies mod filters)
// we're creating and using a string list representation of selected mods so that it can be translated into the DB query itself
var selectedMods = mods.Value.Select(m => m.Acronym);
scores = scores.Where(s => s.Mods.Any(m => selectedMods.Contains(m.Acronym)));
}
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scores = scores.Detach();
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scoreManager.OrderByTotalScoreAsync(scores.ToArray(), cancellationToken)
.ContinueWith(ordered => Schedule(() =>
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{
if (cancellationToken.IsCancellationRequested)
return;
SetScores(ordered.GetResultSafely());
}), TaskContinuationOptions.OnlyOnRanToCompletion);
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}
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}
protected override void Dispose(bool isDisposing)
{
base.Dispose(isDisposing);
scoreSubscription?.Dispose();
}
}
}