lib/client: fix typo

That one turned out to be surprisingly tricky to dig out.

.build.yml

@@ -1,4 +1,5 @@
-image: alpine/latest
+# TODO switch back to alpine/latest once the "npm install" deadlock is fixed
+image: alpine/edge
 packages:
 - npm
 - rsync

lib/client.js

@@ -74,8 +74,8 @@ class IRCError extends Error {
 class Backoff {
 	n = 0;
 
-	constructor(min, max) {
-		this.min = min;
+	constructor(base, max) {
+		this.base = base;
 		this.max = max;
 	}
 
@@ -86,10 +86,10 @@ class Backoff {
 	next() {
 		if (this.n === 0) {
 			this.n = 1;
-			return this.min;
+			return 0;
 		}
 
-		let dur = this.n * this.min;
+		let dur = this.n * this.base;
 		if (dur > this.max) {
 			dur = this.max;
 		} else {
@@ -134,6 +134,7 @@ export default class Client extends EventTarget {
 	autoReconnect = true;
 	reconnectTimeoutID = null;
 	reconnectBackoff = new Backoff(RECONNECT_MIN_DELAY_MSEC, RECONNECT_MAX_DELAY_MSEC);
+	lastReconnectDate = new Date(0);
 	pingIntervalID = null;
 	pendingCmds = {
 		WHO: Promise.resolve(null),
@@ -147,6 +148,8 @@ export default class Client extends EventTarget {
 	constructor(params) {
 		super();
 
+		this.handleOnline = this.handleOnline.bind(this);
+
 		this.params = { ...this.params, ...params };
 
 		this.reconnect();
@@ -159,6 +162,7 @@ export default class Client extends EventTarget {
 
 		console.log("Connecting to " + this.params.url);
 		this.setStatus(Client.Status.CONNECTING);
+		this.lastReconnectDate = new Date();
 
 		try {
 			this.ws = new WebSocket(this.params.url);
@@ -201,15 +205,16 @@ export default class Client extends EventTarget {
 			this.monitored = new irc.CaseMapMap(null, irc.CaseMapping.RFC1459);
 
 			if (this.autoReconnect) {
+				window.addEventListener("online", this.handleOnline);
+
 				if (!navigator.onLine) {
 					console.info("Waiting for network to go back online");
-					const handleOnline = () => {
-						window.removeEventListener("online", handleOnline);
-						this.reconnect();
-					};
-					window.addEventListener("online", handleOnline);
 				} else {
 					let delay = this.reconnectBackoff.next();
+					let sinceLastReconnect = new Date().getTime() - this.lastReconnectDate.getTime();
+					if (sinceLastReconnect < RECONNECT_MIN_DELAY_MSEC) {
+						delay = Math.max(delay, RECONNECT_MIN_DELAY_MSEC);
+					}
 					console.info("Reconnecting to server in " + (delay / 1000) + " seconds");
 					clearTimeout(this.reconnectTimeoutID);
 					this.reconnectTimeoutID = setTimeout(() => {
@@ -226,6 +231,8 @@ export default class Client extends EventTarget {
 		clearTimeout(this.reconnectTimeoutID);
 		this.reconnectTimeoutID = null;
 
+		window.removeEventListener("online", this.handleOnline);
+
 		this.setPingInterval(0);
 
 		if (this.ws) {
@@ -245,6 +252,13 @@ export default class Client extends EventTarget {
 		this.dispatchEvent(new CustomEvent("error", { detail: err }));
 	}
 
+	handleOnline() {
+		window.removeEventListener("online", this.handleOnline);
+		if (this.autoReconnect && this.status === Client.Status.DISCONNECTED) {
+			this.reconnect();
+		}
+	}
+
 	handleOpen() {
 		console.log("Connection opened");
 		this.setStatus(Client.Status.REGISTERING);