receive error when sending message on offline

src/app/module/chat/infra/socket/signalR.ts

@@ -25,7 +25,7 @@ export class SignalRConnection {
   private reconnect = true
 
   private sendDataSubject: BehaviorSubject<{method: string, data: any}> = new BehaviorSubject<{method: string, data: any}>(null);
-
+  private pendingRequests: Map<string, { resolve: Function; reject: Function }> = new Map();
   url: string
 
   constructor({url}) {
@@ -61,6 +61,13 @@ export class SignalRConnection {
         console.log('Connection closed');
         this.connectionStateSubject.next(false);
         this.disconnectSubject.next(true)
+
+        this.pendingRequests.forEach((_, requestId) => {
+          const { reject } = this.pendingRequests.get(requestId);
+          reject(err('Connection closed================!s'));
+          this.pendingRequests.delete(requestId);
+        });
+
         if(this.reconnect) {
           this.attempReconnect();
         }
@@ -98,12 +105,17 @@ export class SignalRConnection {
         console.log('sendMessage', data)
         this.hubConnection.invoke("SendMessage", data)
 
+        //
+        this.pendingRequests.set(data.requestId, { resolve, reject: (data) => resolve(data) });
+
         this.messageSubject.pipe(
           filter((message: any) => data.requestId == message?.requestId),
           first()
         ).subscribe(value => {
           resolve(ok(value))
           console.log('Received valid value:', value);
+          //
+          this.pendingRequests.delete(data.requestId);
         });
 
       } else {