Make iniChartModifiers optional

Author: Geomitron

readme.md

@@ -450,4 +450,14 @@ const noteFlags = {
 	accent: 1024,
 } as const
 
+interface IniChartModifiers {
+	song_length: number								// Default: 0
+	hopo_frequency: number						// Default: 0
+	eighthnote_hopo: boolean					// Default: false
+	multiplier_note: number						// Default: 0
+	sustain_cutoff_threshold: number	// Default: -1
+	chord_snap_threshold: number			// Default: 0
+	five_lane_drums: boolean					// Default: false
+	pro_drums: boolean								// Default: false
+}
 ```

src/chart/note-parsing-interfaces.ts

@@ -12,6 +12,17 @@ export interface IniChartModifiers {
 	pro_drums: boolean
 }
 
+export const defaultIniChartModifiers = {
+	song_length: 0,
+	hopo_frequency: 0,
+	eighthnote_hopo: false,
+	multiplier_note: 0,
+	sustain_cutoff_threshold: -1,
+	chord_snap_threshold: 0,
+	five_lane_drums: false,
+	pro_drums: false,
+}
+
 /**
  * This is the common format that both .mid and .chart parsers target, and is used by `parseChart()` to generate `ChartData`.
  *

src/chart/notes-parser.ts

@@ -3,7 +3,17 @@ import * as _ from 'lodash'
 import { DrumType, drumTypes, Instrument } from 'src/interfaces'
 import { parseNotesFromChart } from './chart-parser'
 import { parseNotesFromMidi } from './midi-parser'
-import { EventType, eventTypes, IniChartModifiers, NoteEvent, noteFlags, NoteType, noteTypes, RawChartData } from './note-parsing-interfaces'
+import {
+	defaultIniChartModifiers,
+	EventType,
+	eventTypes,
+	IniChartModifiers,
+	NoteEvent,
+	noteFlags,
+	NoteType,
+	noteTypes,
+	RawChartData,
+} from './note-parsing-interfaces'
 
 type TrackEvent = RawChartData['trackData'][number]['trackEvents'][number]
 type UntimedNoteEvent = Omit<NoteEvent, 'msTime' | 'msLength'>
@@ -15,7 +25,8 @@ export type ParsedChart = ReturnType<typeof parseChartFile>
  *
  * Throws an exception if `buffer` could not be parsed as a chart in the .chart or .mid format.
  */
-export function parseChartFile(data: Uint8Array, format: 'chart' | 'mid', iniChartModifiers: IniChartModifiers) {
+export function parseChartFile(data: Uint8Array, format: 'chart' | 'mid', partialIniChartModifiers: Partial<IniChartModifiers> = {}) {
+	const iniChartModifiers = Object.assign({}, defaultIniChartModifiers, partialIniChartModifiers) as IniChartModifiers
 	const rawChartData = format === 'mid' ? parseNotesFromMidi(data, iniChartModifiers) : parseNotesFromChart(data)
 	const timedTempos = getTimedTempos(rawChartData.tempos, rawChartData.chartTicksPerBeat)
 	const drumTracks = rawChartData.trackData.filter(track => track.instrument === 'drums')