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

---
 apps/web/src/commands/preview-tracker.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 apps/web/src/commands/preview-tracker.ts

(limited to 'apps/web/src/commands/preview-tracker.ts')

diff --git a/apps/web/src/commands/preview-tracker.ts b/apps/web/src/commands/preview-tracker.ts
new file mode 100644
index 00000000..68c8dee3
--- /dev/null
+++ b/apps/web/src/commands/preview-tracker.ts
@@ -0,0 +1,23 @@
+export class PreviewTracker<T> {
+	private snapshot: T | null = null;
+
+	begin({ state }: { state: T }): void {
+		if (this.snapshot === null) {
+			this.snapshot = structuredClone(state);
+		}
+	}
+
+	isActive(): boolean {
+		return this.snapshot !== null;
+	}
+
+	getSnapshot(): T | null {
+		return this.snapshot;
+	}
+
+	end(): T | null {
+		const snapshot = this.snapshot;
+		this.snapshot = null;
+		return snapshot;
+	}
+}
-- 
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