From 3e89d2998588f8e35c524e523ba2ee853f0f6475 Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Mon, 20 Apr 2026 11:31:17 +0200
Subject: refactor: restructure files to their domains,  new preview overlay
 system, and dep graph

---
 .../timeline/element/keyframes/upsert-keyframe.ts  | 96 ++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 apps/web/src/commands/timeline/element/keyframes/upsert-keyframe.ts

(limited to 'apps/web/src/commands/timeline/element/keyframes/upsert-keyframe.ts')

diff --git a/apps/web/src/commands/timeline/element/keyframes/upsert-keyframe.ts b/apps/web/src/commands/timeline/element/keyframes/upsert-keyframe.ts
new file mode 100644
index 00000000..30514146
--- /dev/null
+++ b/apps/web/src/commands/timeline/element/keyframes/upsert-keyframe.ts
@@ -0,0 +1,96 @@
+import { EditorCore } from "@/core";
+import { Command, type CommandResult } from "@/commands/base-command";
+import { resolveAnimationTarget, upsertPathKeyframe } from "@/animation";
+import { updateElementInSceneTracks } from "@/timeline";
+import type { SceneTracks } from "@/timeline";
+import type {
+	AnimationPath,
+	AnimationInterpolation,
+	AnimationValue,
+} from "@/animation/types";
+
+export class UpsertKeyframeCommand extends Command {
+	private savedState: SceneTracks | null = null;
+	private readonly trackId: string;
+	private readonly elementId: string;
+	private readonly propertyPath: AnimationPath;
+	private readonly time: number;
+	private readonly value: AnimationValue;
+	private readonly interpolation: AnimationInterpolation | undefined;
+	private readonly keyframeId: string | undefined;
+
+	constructor({
+		trackId,
+		elementId,
+		propertyPath,
+		time,
+		value,
+		interpolation,
+		keyframeId,
+	}: {
+		trackId: string;
+		elementId: string;
+		propertyPath: AnimationPath;
+		time: number;
+		value: AnimationValue;
+		interpolation?: AnimationInterpolation;
+		keyframeId?: string;
+	}) {
+		super();
+		this.trackId = trackId;
+		this.elementId = elementId;
+		this.propertyPath = propertyPath;
+		this.time = time;
+		this.value = value;
+		this.interpolation = interpolation;
+		this.keyframeId = keyframeId;
+	}
+
+	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,
+			update: (element) => {
+				const target = resolveAnimationTarget({
+					element,
+					path: this.propertyPath,
+				});
+				if (!target) {
+					return element;
+				}
+
+				const boundedTime = Math.max(0, Math.min(this.time, element.duration));
+				return {
+					...element,
+					animations: upsertPathKeyframe({
+						animations: element.animations,
+						propertyPath: this.propertyPath,
+						time: boundedTime,
+						value: this.value,
+						interpolation: this.interpolation,
+						keyframeId: this.keyframeId,
+						kind: target.kind,
+						defaultInterpolation: target.defaultInterpolation,
+						coerceValue: target.coerceValue,
+					}),
+				};
+			},
+		});
+
+		editor.timeline.updateTracks(updatedTracks);
+		return undefined;
+	}
+
+	undo(): void {
+		if (!this.savedState) {
+			return;
+		}
+
+		const editor = EditorCore.getInstance();
+		editor.timeline.updateTracks(this.savedState);
+	}
+}
-- 
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