1.0.1

static/node_modules/udn-frontend/index.ts

@@ -1,4 +1,6 @@
 export interface Message {
+  uuid?: string; // to be assigned by
+
   // connecting to server
   requestingServerConnection?: boolean;
 
@@ -15,21 +17,24 @@ export interface Message {
   unsubscribeChannel?: string;
   subscribed?: boolean; // sent by server
 
-  //sending message
+  // sending message
   messageChannel?: string;
   messageBody?: string;
+
+  // confirming message
+  confirmingMessageReceived?: boolean;
 }
 
 export default class UDNFrontend {
   ws: WebSocket | undefined;
 
   // HANDLERS
-  private connectionHandler = () => {};
-  private disconnectionHandler = () => {};
-  private messageHandler = (data: Message) => {};
-  private mailboxHandler = (mailboxId: string) => {};
-  private mailboxConnectionHandler = (mailboxId: string) => {};
-  private mailboxDeleteHandler = (mailboxId: string) => {};
+  private connectionHandler = () => { };
+  private disconnectionHandler = () => { };
+  private messageHandler = (data: Message) => { };
+  private mailboxHandler = (mailboxId: string) => { };
+  private mailboxConnectionHandler = (mailboxId: string) => { };
+  private mailboxDeleteHandler = (mailboxId: string) => { };
 
   // INIT
   set onconnect(handler: () => void) {
@@ -54,6 +59,7 @@ export default class UDNFrontend {
   // UTILITY METHODS
   private send(messageObject: Message): boolean {
     if (this.ws == undefined) return false;
+    if (this.ws.readyState != 1) return false;
 
     const messageString = JSON.stringify(messageObject);
     this.ws.send(messageString);
@@ -80,6 +86,7 @@ export default class UDNFrontend {
         } else if (data.deletedMailbox) {
           return this.mailboxDeleteHandler(data.deletedMailbox);
         } else {
+          this.send({ uuid: data.uuid, confirmingMessageReceived: true });
           this.messageHandler(data);
         }
       });