/**
 * Shared idempotent start/stop wrapper over setInterval, extracted once TaskOverlay and
 * NoteOverlay both needed the identical "fallback refresh for a mutation no event announces"
 * behavior -- a second start() is a no-op rather than a competing timer, and stop() is safe
 * to call even if never started.
 */
export class BoundedPoll {
	private timer: ReturnType<typeof setInterval> | undefined;

	start(intervalMs: number, tick: () => void): void {
		if (this.timer) return;
		this.timer = setInterval(tick, intervalMs);
	}

	stop(): void {
		if (!this.timer) return;
		clearInterval(this.timer);
		this.timer = undefined;
	}
}