fluxer/fluxer_app/pkgs/livekit-client/src/room/DefaultReconnectPolicy.ts

// SPDX-FileCopyrightText: 2024 LiveKit, Inc.
//
// SPDX-License-Identifier: Apache-2.0
import type {ReconnectContext, ReconnectPolicy} from './ReconnectPolicy.ts';

const maxRetryDelay = 7000;

const DEFAULT_RETRY_DELAYS_IN_MS = [
	0,
	300,
	2 * 2 * 300,
	3 * 3 * 300,
	4 * 4 * 300,
	maxRetryDelay,
	maxRetryDelay,
	maxRetryDelay,
	maxRetryDelay,
	maxRetryDelay,
];

class DefaultReconnectPolicy implements ReconnectPolicy {
	private readonly _retryDelays: Array<number>;

	constructor(retryDelays?: Array<number>) {
		this._retryDelays = retryDelays !== undefined ? [...retryDelays] : DEFAULT_RETRY_DELAYS_IN_MS;
	}

	public nextRetryDelayInMs(context: ReconnectContext): number | null {
		if (context.retryCount >= this._retryDelays.length) return null;

		const retryDelay = this._retryDelays[context.retryCount];
		if (context.retryCount <= 1) return retryDelay;

		return retryDelay + Math.random() * 1_000;
	}
}

export default DefaultReconnectPolicy;