sinmai-mods/MoreChartFormats/MaiSxt/SxtReader.cs

using System;
using System.Runtime.CompilerServices;
using Manager;
using MoreChartFormats.MaiSxt.Structures;

namespace MoreChartFormats.MaiSxt;

public class SxtReader(NotesReferences refs) : SxtReaderBase(refs)
{
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    protected override void LoadRow(int rowIdx, in SxtRow row)
    {
        if (row.NoteType == 0)
        {
            if (row.SlideId == 0)
            {
                throw new Exception($"Slide head at row {rowIdx} does not declare a valid slide ID");
            }
            
            SlideHeads[row.SlideId] = row;
            return;
        }

        var rowTime = row.NotesTime(Refs.Reader);
        var note = new NoteData
        {
            type = row.NoteType switch
            {
                1 => NotesTypeID.Def.Tap,
                2 => NotesTypeID.Def.Hold,
                3 => NotesTypeID.Def.Break,
                4 => NotesTypeID.Def.Star,
                5 => NotesTypeID.Def.BreakStar,
                128 => NotesTypeID.Def.Slide,
                _ => throw new Exception($"Unknown note type ID {row.NoteType} at row {rowIdx}, expected 1/2/3/4/5/128")
            },
            startButtonPos = row.Position,
            time = rowTime,
            end = rowTime,
            beatType = ParserUtilities.GetBeatType(rowTime.grid),
            index = rowIdx,
            indexNote = NoteIndex
        };
        
        if (note.type.isHold())
        {
            note.end += ParserUtilities.NotesTimeFromBars(Refs, row.HoldDuration);
            note.end.calcMsec(Refs.Reader);
        }
        
        if (note.type.isSlide())
        {
            if (!SlideHeads.TryGetValue(row.SlideId, out var slideHeadRow))
            {
                throw new Exception($"Slide body (ID {row.SlideId}) declared without or before its head");
            }

            note.startButtonPos = slideHeadRow.Position;
            note.slideData = new SlideData
            {
                type = (SlideType)row.SlidePattern,
                index = row.SlideId,
                targetNote = row.Position,
                shoot = new TimingBase { index = rowIdx },
                arrive = new TimingBase { index = rowIdx },
            };

            note.time = slideHeadRow.NotesTime(Refs.Reader);
            note.beatType = ParserUtilities.GetBeatType(note.time.grid);
            note.slideData.shoot.time = note.time + slideHeadRow.SlideDelayNotesTime(Refs);
            note.slideData.shoot.time.calcMsec(Refs.Reader);
            note.slideData.arrive.time.copy(rowTime);
            note.end.copy(rowTime);
        }
        
        Refs.Notes._noteData.Add(note);
        NoteIndex++;
    }
}