configurable websocket keepalive ping

src/connector/websocket.connector.ts

@@ -31,10 +31,16 @@ export class IRCWebSocketConnector
     return new Promise((resolve, reject) => {
       const onConnect = () => {
         this.connected = true;
+
+        // Allow using a custom pinger, otherwise, ping every minute
+        // to keep socket alive
+        if (!this.connOpts?.skipPings) {
           this.pingInterval = setInterval(() => {
             this.lastPingName = Date.now().toString();
             this.write('PING :%s', this.lastPingName);
-        }, 60000);
+          }, (this.connOpts?.wsPingInterval as number) || 60000);
+        }
+
         resolve();
       };
 
@@ -64,17 +70,17 @@ export class IRCWebSocketConnector
     this.socket?.addEventListener('message', (event) => {
       const line = event.data.toString();
 
-      if (line.indexOf('PING') === 0 && !this.connOpts?.skipPings) {
+      // Allow using a custom pinger
+      if (!this.connOpts?.skipPings) {
+        if (line.indexOf('PING') === 0) {
           this.socket?.send('PONG' + line.substring(4));
           return;
         }
 
-      if (
-        line.indexOf('PONG') === 0 &&
-        line.includes(' :' + this.lastPingName)
-      ) {
+        if (line.includes('PONG') && line.includes(' :' + this.lastPingName)) {
           return;
         }
+      }
 
       this.emit('data', line);
     });

src/types/irc.interfaces.ts

@@ -144,6 +144,10 @@ export interface IIRCOptions {
    * Special cases for included connections:
    * - `path` - `IRCWebSocketConnector` will append this to the WebSocket URL.
    * - `skipPings` - Included connectors will not respond to PINGs if set.
+   * - `wsPingInterval` - `IRCWebSocketConnector` pings the server instead of the server pinging it.
+   * Here, you can set the ping interval in milliseconds. Defaults to `60000`, 1 minute. This setting
+   * is ignored if you have specified `skipPings`, in which case, you will need to use a custom pinger
+   * for the WebSocket.
    */
   connOpts?: Record<string, unknown>;
 }