initial public release.

src/core/midi/KGMidiNote.ts

@@ -0,0 +1,99 @@
+import { Expose } from 'class-transformer';
+import type { Selectable } from '../../components/interfaces';
+
+/**
+ * KGMidiNote - Class representing a MIDI note in the DAW
+ * Contains note timing, pitch and volume information
+ */
+export class KGMidiNote implements Selectable {
+  @Expose()
+  private id: string = '';
+  
+  @Expose()
+  private startBeat: number = 0;
+  
+  @Expose()
+  private endBeat: number = 0;
+  
+  @Expose()
+  private pitch: number = 0;
+  
+  @Expose()
+  private velocity: number = 127;
+  
+  @Expose()
+  private selected: boolean = false;
+
+  constructor(id: string, startBeat: number = 0, endBeat: number = 0, pitch: number = 0, velocity: number = 127) {
+    this.id = id;
+    this.startBeat = startBeat;
+    this.endBeat = endBeat;
+    this.pitch = pitch;
+    this.velocity = velocity;
+  }
+
+  // Getters
+  public getId(): string {
+    return this.id;
+  }
+
+  public getStartBeat(): number {
+    return this.startBeat;
+  }
+
+  public getEndBeat(): number {
+    return this.endBeat;
+  }
+
+  public getPitch(): number {
+    return this.pitch;
+  }
+
+  public getVelocity(): number {
+    return this.velocity;
+  }
+
+  // Setters
+  public setId(id: string): void {
+    this.id = id;
+  }
+
+  public setStartBeat(startBeat: number): void {
+    this.startBeat = startBeat;
+  }
+
+  public setEndBeat(endBeat: number): void {
+    this.endBeat = endBeat;
+  }
+
+  public setPitch(pitch: number): void {
+    this.pitch = pitch;
+  }
+
+  public setVelocity(velocity: number): void {
+    this.velocity = velocity;
+  }
+  
+  // Selectable 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 'KGMidiNote';
+  }
+
+  // Current type identification for copy/paste operations
+  public getCurrentType(): string {
+    return 'KGMidiNote';
+  }
+}