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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
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using System ;
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using osu.Game.Beatmaps.Timing ;
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using osu.Game.Rulesets.Objects ;
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using System.Collections.Generic ;
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using System.Linq ;
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using osu.Game.Beatmaps.ControlPoints ;
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using Newtonsoft.Json ;
using osu.Game.IO.Serialization.Converters ;
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namespace osu.Game.Beatmaps
{
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public class Beatmap < T > : IBeatmap < T >
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where T : HitObject
{
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private BeatmapDifficulty difficulty = new BeatmapDifficulty ( ) ;
public BeatmapDifficulty Difficulty
{
get = > difficulty ;
set
{
difficulty = value ;
if ( beatmapInfo ! = null )
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beatmapInfo . Difficulty = difficulty . Clone ( ) ;
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}
}
private BeatmapInfo beatmapInfo ;
public BeatmapInfo BeatmapInfo
{
get = > beatmapInfo ;
set
{
beatmapInfo = value ;
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if ( beatmapInfo ? . Difficulty ! = null )
Difficulty = beatmapInfo . Difficulty . Clone ( ) ;
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}
}
public Beatmap ( )
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{
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beatmapInfo = new BeatmapInfo
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{
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Metadata = new BeatmapMetadata
{
Artist = @"Unknown" ,
Title = @"Unknown" ,
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Author = { Username = @"Unknown Creator" } ,
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} ,
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DifficultyName = @"Normal" ,
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Difficulty = Difficulty ,
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} ;
}
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[JsonIgnore]
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public BeatmapMetadata Metadata = > BeatmapInfo . Metadata ;
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public ControlPointInfo ControlPointInfo { get ; set ; } = new ControlPointInfo ( ) ;
public List < BreakPeriod > Breaks { get ; set ; } = new List < BreakPeriod > ( ) ;
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[JsonIgnore]
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public double TotalBreakTime = > Breaks . Sum ( b = > b . Duration ) ;
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[JsonConverter(typeof(TypedListConverter<HitObject>))]
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public List < T > HitObjects { get ; set ; } = new List < T > ( ) ;
IReadOnlyList < T > IBeatmap < T > . HitObjects = > HitObjects ;
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IReadOnlyList < HitObject > IBeatmap . HitObjects = > HitObjects ;
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public virtual IEnumerable < BeatmapStatistic > GetStatistics ( ) = > Enumerable . Empty < BeatmapStatistic > ( ) ;
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public double GetMostCommonBeatLength ( )
{
// The last playable time in the beatmap - the last timing point extends to this time.
// Note: This is more accurate and may present different results because osu-stable didn't have the ability to calculate slider durations in this context.
double lastTime = HitObjects . LastOrDefault ( ) ? . GetEndTime ( ) ? ? ControlPointInfo . TimingPoints . LastOrDefault ( ) ? . Time ? ? 0 ;
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var mostCommon =
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// Construct a set of (beatLength, duration) tuples for each individual timing point.
ControlPointInfo . TimingPoints . Select ( ( t , i ) = >
{
if ( t . Time > lastTime )
return ( beatLength : t . BeatLength , 0 ) ;
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// osu-stable forced the first control point to start at 0.
// This is reproduced here to maintain compatibility around osu!mania scroll speed and song select display.
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double currentTime = i = = 0 ? 0 : t . Time ;
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double nextTime = i = = ControlPointInfo . TimingPoints . Count - 1 ? lastTime : ControlPointInfo . TimingPoints [ i + 1 ] . Time ;
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return ( beatLength : t . BeatLength , duration : nextTime - currentTime ) ;
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} )
// Aggregate durations into a set of (beatLength, duration) tuples for each beat length
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. GroupBy ( t = > Math . Round ( t . beatLength * 1000 ) / 1000 )
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. Select ( g = > ( beatLength : g . Key , duration : g . Sum ( t = > t . duration ) ) )
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// Get the most common one, or 0 as a suitable default
. OrderByDescending ( i = > i . duration ) . FirstOrDefault ( ) ;
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return mostCommon . beatLength ;
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}
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IBeatmap IBeatmap . Clone ( ) = > Clone ( ) ;
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public Beatmap < T > Clone ( ) = > ( Beatmap < T > ) MemberwiseClone ( ) ;
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}
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public class Beatmap : Beatmap < HitObject >
{
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public new Beatmap Clone ( ) = > ( Beatmap ) base . Clone ( ) ;
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public override string ToString ( ) = > BeatmapInfo ? . ToString ( ) ? ? base . ToString ( ) ;
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}
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}