1 files changed, 76 insertions, 0 deletions
diff --git a/apps/web/src/commands/timeline/element/masks/toggle-mask-inverted.ts b/apps/web/src/commands/timeline/element/masks/toggle-mask-inverted.ts
new file mode 100644
index 00000000..fec9b923
--- /dev/null
+++ b/apps/web/src/commands/timeline/element/masks/toggle-mask-inverted.ts
@@ -0,0 +1,76 @@
+import { EditorCore } from "@/core";
+import { Command, type CommandResult } from "@/commands/base-command";
+import { isMaskableElement, updateElementInSceneTracks } from "@/timeline";
+import type { Mask } from "@/masks/types";
+import type { SceneTracks, MaskableElement } from "@/timeline";
+
+export function toggleMaskInvertedOnElement({
+	element,
+	maskId,
+}: {
+	element: MaskableElement;
+	maskId: string;
+}): MaskableElement {
+	const currentMasks = element.masks ?? [];
+	const toggleMask = <TMask extends Mask>(mask: TMask): TMask => ({
+		...mask,
+		params: {
+			...mask.params,
+			inverted: !mask.params.inverted,
+		},
+	});
+	const updatedMasks = currentMasks.map((mask) =>
+		mask.id !== maskId ? mask : toggleMask(mask),
+	);
+
+	return { ...element, masks: updatedMasks };
+}
+
+export class ToggleMaskInvertedCommand extends Command {
+	private savedState: SceneTracks | null = null;
+	private readonly trackId: string;
+	private readonly elementId: string;
+	private readonly maskId: string;
+
+	constructor({
+		trackId,
+		elementId,
+		maskId,
+	}: {
+		trackId: string;
+		elementId: string;
+		maskId: string;
+	}) {
+		super();
+		this.trackId = trackId;
+		this.elementId = elementId;
+		this.maskId = maskId;
+	}
+
+	execute(): CommandResult | undefined {
+		const editor = EditorCore.getInstance();
+		this.savedState = editor.scenes.getActiveScene().tracks;
+
+		const updatedTracks = updateElementInSceneTracks({
+			tracks: this.savedState,
+			trackId: this.trackId,
+			elementId: this.elementId,
+			elementPredicate: isMaskableElement,
+			update: (element) =>
+				toggleMaskInvertedOnElement({
+					element: element as MaskableElement,
+					maskId: this.maskId,
+				}),
+		});
+
+		editor.timeline.updateTracks(updatedTracks);
+		return undefined;
+	}
+
+	undo(): void {
+		if (this.savedState) {
+			const editor = EditorCore.getInstance();
+			editor.timeline.updateTracks(this.savedState);
+		}
+	}
+}