feat: added pitch bend support

src/core/commands/note/UpdatePitchBendPropertiesCommand.ts

@@ -0,0 +1,82 @@
+import { KGCommand } from '../KGCommand';
+import { KGCore } from '../../KGCore';
+import { KGMidiPitchBend } from '../../midi/KGMidiPitchBend';
+import { KGMidiRegion } from '../../region/KGMidiRegion';
+import { KGTrack } from '../../track/KGTrack';
+
+interface PitchBendSnapshot {
+  pitchBendId: string;
+  beat: number;
+  value: number;
+}
+
+interface PitchBendUpdate {
+  pitchBendId: string;
+  beat?: number;
+  value?: number;
+}
+
+export class UpdatePitchBendPropertiesCommand extends KGCommand {
+  private regionId: string;
+  private snapshots: PitchBendSnapshot[];
+  private updates: PitchBendUpdate[];
+  private targetRegion: KGMidiRegion | null = null;
+  private parentTrack: KGTrack | null = null;
+
+  constructor(regionId: string, snapshots: PitchBendSnapshot[], updates: PitchBendUpdate[]) {
+    super();
+    this.regionId = regionId;
+    this.snapshots = [...snapshots];
+    this.updates = [...updates];
+  }
+
+  execute(): void {
+    const tracks = KGCore.instance().getCurrentProject().getTracks();
+
+    for (const track of tracks) {
+      const region = track.getRegions().find(r => r.getId() === this.regionId) as KGMidiRegion | undefined;
+      if (region) {
+        this.targetRegion = region;
+        this.parentTrack = track;
+        break;
+      }
+    }
+
+    if (!this.targetRegion) {
+      throw new Error(`Region with ID ${this.regionId} not found`);
+    }
+
+    const pitchBends = this.targetRegion.getPitchBends();
+    for (const update of this.updates) {
+      const pitchBend = pitchBends.find(candidate => candidate.getId() === update.pitchBendId);
+      if (pitchBend) {
+        if (update.beat !== undefined) pitchBend.setBeat(update.beat);
+        if (update.value !== undefined) pitchBend.setValue(update.value);
+      }
+    }
+  }
+
+  undo(): void {
+    if (!this.targetRegion) {
+      throw new Error('Cannot undo: command was not executed');
+    }
+
+    const pitchBends = this.targetRegion.getPitchBends();
+    this.snapshots.forEach(snapshot => {
+      const pitchBend = pitchBends.find(candidate => candidate.getId() === snapshot.pitchBendId);
+      if (pitchBend) {
+        pitchBend.setBeat(snapshot.beat);
+        pitchBend.setValue(snapshot.value);
+      }
+    });
+  }
+
+  getDescription(): string {
+    const count = this.snapshots.length;
+    return count === 1 ? 'Update pitch bend properties' : `Update ${count} pitch bends' properties`;
+  }
+
+  public getParentTrack(): KGTrack | null {
+    return this.parentTrack;
+  }
+}