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240 lines
8.3 KiB
C#
240 lines
8.3 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Threading;
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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using osu.Game.Beatmaps;
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using osu.Game.Database;
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using osu.Game.Extensions;
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using osu.Game.Online.API;
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using osu.Game.Online.API.Requests;
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using osu.Game.Online.Leaderboards;
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using osu.Game.Rulesets;
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using osu.Game.Rulesets.Mods;
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using osu.Game.Scoring;
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using Realms;
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namespace osu.Game.Screens.Select.Leaderboards
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{
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public partial class BeatmapLeaderboard : Leaderboard<BeatmapLeaderboardScope, ScoreInfo>
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{
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public Action<ScoreInfo>? ScoreSelected;
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private BeatmapInfo? beatmapInfo;
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public BeatmapInfo? BeatmapInfo
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{
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get => beatmapInfo;
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set
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{
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if (beatmapInfo == null && value == null)
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return;
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if (beatmapInfo?.Equals(value) == true)
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return;
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beatmapInfo = value;
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// Refetch is scheduled, which can cause scores to be outdated if the leaderboard is not currently updating.
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// As scores are potentially used by other components, clear them eagerly to ensure a more correct state.
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SetScores(null);
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RefetchScores();
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}
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}
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private bool filterMods;
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/// <summary>
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/// Whether to apply the game's currently selected mods as a filter when retrieving scores.
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/// </summary>
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public bool FilterMods
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{
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get => filterMods;
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set
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{
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if (value == filterMods)
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return;
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filterMods = value;
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RefetchScores();
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}
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}
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[Resolved]
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private ScoreManager scoreManager { get; set; } = null!;
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[Resolved]
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private IBindable<RulesetInfo> ruleset { get; set; } = null!;
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[Resolved]
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private IBindable<IReadOnlyList<Mod>> mods { get; set; } = null!;
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[Resolved]
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private IAPIProvider api { get; set; } = null!;
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[Resolved]
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private RulesetStore rulesets { get; set; } = null!;
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[Resolved]
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private RealmAccess realm { get; set; } = null!;
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private IDisposable? scoreSubscription;
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private GetScoresRequest? scoreRetrievalRequest;
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[BackgroundDependencyLoader]
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private void load()
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{
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ruleset.ValueChanged += _ => RefetchScores();
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mods.ValueChanged += _ =>
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{
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if (filterMods)
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RefetchScores();
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};
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}
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protected override bool IsOnlineScope => Scope != BeatmapLeaderboardScope.Local;
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protected override APIRequest? FetchScores(CancellationToken cancellationToken)
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{
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scoreRetrievalRequest?.Cancel();
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scoreRetrievalRequest = null;
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var fetchBeatmapInfo = BeatmapInfo;
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if (fetchBeatmapInfo == null)
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{
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SetErrorState(LeaderboardState.NoneSelected);
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return null;
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}
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var fetchRuleset = ruleset.Value ?? fetchBeatmapInfo.Ruleset;
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if (Scope == BeatmapLeaderboardScope.Local)
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{
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subscribeToLocalScores(fetchBeatmapInfo, cancellationToken);
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return null;
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}
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if (!api.IsLoggedIn)
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{
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SetErrorState(LeaderboardState.NotLoggedIn);
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return null;
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}
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if (!fetchRuleset.IsLegacyRuleset())
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{
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SetErrorState(LeaderboardState.RulesetUnavailable);
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return null;
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}
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if (fetchBeatmapInfo.OnlineID <= 0 || fetchBeatmapInfo.Status <= BeatmapOnlineStatus.Pending)
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{
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SetErrorState(LeaderboardState.BeatmapUnavailable);
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return null;
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}
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if (!api.LocalUser.Value.IsSupporter && (Scope != BeatmapLeaderboardScope.Global || filterMods))
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{
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SetErrorState(LeaderboardState.NotSupporter);
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return null;
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}
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IReadOnlyList<Mod>? requestMods = null;
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if (filterMods && !mods.Value.Any())
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// add nomod for the request
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requestMods = new Mod[] { new ModNoMod() };
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else if (filterMods)
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requestMods = mods.Value;
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var newRequest = new GetScoresRequest(fetchBeatmapInfo, fetchRuleset, Scope, requestMods);
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newRequest.Success += response => Schedule(() =>
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{
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// Request may have changed since fetch request.
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// Can't rely on request cancellation due to Schedule inside SetScores so let's play it safe.
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if (!newRequest.Equals(scoreRetrievalRequest))
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return;
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SetScores(
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scoreManager.OrderByTotalScore(response.Scores.Select(s => s.ToScoreInfo(rulesets, fetchBeatmapInfo))),
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response.UserScore?.CreateScoreInfo(rulesets, fetchBeatmapInfo)
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);
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});
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return scoreRetrievalRequest = newRequest;
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}
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protected override LeaderboardScore CreateDrawableScore(ScoreInfo model, int index) => new LeaderboardScore(model, index, IsOnlineScope)
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{
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Action = () => ScoreSelected?.Invoke(model)
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};
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protected override LeaderboardScore CreateDrawableTopScore(ScoreInfo model) => new LeaderboardScore(model, model.Position, false)
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{
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Action = () => ScoreSelected?.Invoke(model)
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};
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private void subscribeToLocalScores(BeatmapInfo beatmapInfo, CancellationToken cancellationToken)
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{
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Debug.Assert(beatmapInfo != null);
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scoreSubscription?.Dispose();
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scoreSubscription = null;
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scoreSubscription = realm.RegisterForNotifications(r =>
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r.All<ScoreInfo>().Filter($"{nameof(ScoreInfo.BeatmapInfo)}.{nameof(BeatmapInfo.ID)} == $0"
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+ $" AND {nameof(ScoreInfo.BeatmapInfo)}.{nameof(BeatmapInfo.Hash)} == {nameof(ScoreInfo.BeatmapHash)}"
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+ $" AND {nameof(ScoreInfo.Ruleset)}.{nameof(RulesetInfo.ShortName)} == $1"
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+ $" AND {nameof(ScoreInfo.DeletePending)} == false"
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, beatmapInfo.ID, ruleset.Value.ShortName), localScoresChanged);
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void localScoresChanged(IRealmCollection<ScoreInfo> sender, ChangeSet? changes, Exception exception)
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{
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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.
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// It's currently not possible for a score to be modified after insertion, so we can safely ignore callbacks with only modifications.
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if (changes?.HasCollectionChanges() == false)
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return;
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var scores = sender.AsEnumerable();
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if (filterMods && !mods.Value.Any())
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{
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// we need to filter out all scores that have any mods to get all local nomod scores
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scores = scores.Where(s => !s.Mods.Any());
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}
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else if (filterMods)
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{
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// otherwise find all the scores that have all of the currently selected mods (similar to how web applies mod filters)
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// we're creating and using a string HashSet representation of selected mods so that it can be translated into the DB query itself
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var selectedMods = mods.Value.Select(m => m.Acronym).ToHashSet();
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scores = scores.Where(s => selectedMods.SetEquals(s.Mods.Select(m => m.Acronym)));
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}
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scores = scoreManager.OrderByTotalScore(scores.Detach());
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SetScores(scores);
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}
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}
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protected override void Dispose(bool isDisposing)
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{
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base.Dispose(isDisposing);
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scoreSubscription?.Dispose();
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scoreRetrievalRequest?.Cancel();
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}
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}
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}
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