initial public release.

src/core/region/KGMidiRegion.ts

@@ -0,0 +1,46 @@
+import { Expose, Type } from 'class-transformer';
+import { KGRegion } from './KGRegion';
+import { KGMidiNote } from '../midi/KGMidiNote';
+
+/**
+ * KGMidiRegion - Class representing a MIDI region in the DAW
+ * Contains MIDI notes and inherits position/length from KGRegion
+ */
+export class KGMidiRegion extends KGRegion {
+  @Expose()
+  protected override __type: string = 'KGMidiRegion';
+  
+  @Expose()
+  @Type(() => KGMidiNote)
+  protected notes: KGMidiNote[] = [];
+
+  constructor(id: string, trackId: string, trackIndex: number, name: string, startFromBeat: number = 0, length: number = 0) {
+    super(id, trackId, trackIndex, name, startFromBeat, length);
+    this.__type = 'KGMidiRegion';
+  }
+
+  // Getter
+  public getNotes(): KGMidiNote[] {
+    return this.notes;
+  }
+
+  // Setter
+  public setNotes(notes: KGMidiNote[]): void {
+    this.notes = notes;
+  }
+
+  // Add a single note
+  public addNote(note: KGMidiNote): void {
+    this.notes.push(note);
+  }
+
+  // Remove a note by ID
+  public removeNote(noteId: string): void {
+    this.notes = this.notes.filter(note => note.getId() !== noteId);
+  }
+
+  // Override getCurrentType to return specific subclass type
+  public override getCurrentType(): string {
+    return 'KGMidiRegion';
+  }
+}

src/core/region/KGRegion.ts

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+import { Expose } from 'class-transformer';
+import type { Selectable } from '../../components/interfaces';
+
+/**
+ * KGRegion - Base class for regions in the DAW
+ * Contains position and length information
+ */
+export class KGRegion implements Selectable {
+  @Expose()
+  protected __type: string = 'KGRegion';
+  
+  @Expose()
+  protected id: string = '';
+  
+  @Expose()
+  protected trackId: string = '';
+  
+  @Expose()
+  protected trackIndex: number = 0;
+  
+  @Expose()
+  protected name: string = '';
+  
+  @Expose()
+  protected startFromBeat: number = 0;
+  
+  @Expose()
+  protected length: number = 0;
+
+  @Expose()
+  protected selected: boolean = false;
+
+  constructor(id: string, trackId: string, trackIndex: number, name: string, startFromBeat: number = 0, length: number = 0) {
+    this.id = id;
+    this.trackId = trackId;
+    this.trackIndex = trackIndex;
+    this.name = name;
+    this.startFromBeat = startFromBeat;
+    this.length = length;
+
+    this.selected = false;
+  }
+
+  // Getters
+  public getId(): string {
+    return this.id;
+  }
+
+  public getTrackId(): string {
+    return this.trackId;
+  }
+
+  public getTrackIndex(): number {
+    return this.trackIndex;
+  }
+
+  public getName(): string {
+    return this.name;
+  }
+
+  public getStartFromBeat(): number {
+    return this.startFromBeat;
+  }
+
+  public getLength(): number {
+    return this.length;
+  }
+
+  // Setters
+  public setId(id: string): void {
+    this.id = id;
+  }
+
+  public setTrackId(trackId: string): void {
+    this.trackId = trackId;
+  }
+
+  public setTrackIndex(trackIndex: number): void {
+    this.trackIndex = trackIndex;
+  }
+
+  public setName(name: string): void {
+    this.name = name;
+  }
+
+  public setStartFromBeat(startFromBeat: number): void {
+    this.startFromBeat = startFromBeat;
+  }
+
+  public setLength(length: number): void {
+    this.length = length;
+  }
+
+  // interface methods
+  public select(): void {
+    this.selected = true;
+  }
+
+  public deselect(): void {
+    this.selected = false;
+  }
+
+  public isSelected(): boolean {
+    return this.selected;
+  }
+
+  // Type identification method for performance-optimized instanceof checks
+  public getRootType(): string {
+    return 'KGRegion';
+  }
+
+  // Current type identification for copy/paste operations
+  public getCurrentType(): string {
+    return 'KGRegion';
+  }
+}