persist state and reconnect automatically

1 files changed, 10 insertions, 0 deletions

diff --git a/extension/src/util/messenger.ts b/extension/src/util/messenger.ts
index b1df161b..7fd71ddd 100644
--- a/extension/src/util/messenger.ts
+++ b/extension/src/util/messenger.ts
@@ -15,6 +15,8 @@ export abstract class Messenger {
   abstract onOpen(callback: () => void): void;
 
   abstract onClose(callback: () => void): void;
+  
+  abstract onError(callback: () => void): void;
 
   abstract sendAndReceive(messageType: string, data: any): Promise<any>;
 }
@@ -26,6 +28,7 @@ export class WebsocketMessenger extends Messenger {
   } = {};
   private onOpenListeners: (() => void)[] = [];
   private onCloseListeners: (() => void)[] = [];
+  private onErrorListeners: (() => void)[] = [];
   private serverUrl: string;
 
   _newWebsocket(): WebSocket {
@@ -43,6 +46,9 @@ export class WebsocketMessenger extends Messenger {
     for (const listener of this.onCloseListeners) {
       this.onClose(listener);
     }
+    for (const listener of this.onErrorListeners) {
+      this.onError(listener);
+    }
     for (const messageType in this.onMessageListeners) {
       for (const listener of this.onMessageListeners[messageType]) {
         this.onMessageType(messageType, listener);
@@ -151,4 +157,8 @@ export class WebsocketMessenger extends Messenger {
   onClose(callback: () => void): void {
     this.websocket.addEventListener("close", callback);
   }
+
+  onError(callback: () => void): void {
+    this.websocket.addEventListener("error", callback);
+  }
 }