C#•9mo ago

✅ How to get confirmation from user about reading the notification?

Notifications work easy in my case. I just send notification message to all clients using broker. UI (it is vue.js in my case) subscribes to topic and receives message than send it to clients. Let's see some code:

public async Task<Task> OnNotify(
   IDeliveryHandlerContext context,
   ClientNotifyRequestArguments request)
{
    var clientConnectionSummaries = _connectedClients.Values?
        .Where(connection => connection.Principal != null
              && connection.Principal.Name == request.Login)
        .EmptyIfNull();

    if(clientConnectionSummaries == null)
        return Task.CompletedTask;

    foreach(var clientSummary in clientConnectionSummaries)
       Task.Run(async () => await SendAsync(context,request,clientSummary), Lifetime.Finalizing)
            .NoWait(Logger);

    return Task.CompletedTask;
}

public async Task<Task> OnNotify(
   IDeliveryHandlerContext context,
   ClientNotifyRequestArguments request)
{
    var clientConnectionSummaries = _connectedClients.Values?
        .Where(connection => connection.Principal != null
              && connection.Principal.Name == request.Login)
        .EmptyIfNull();

    if(clientConnectionSummaries == null)
        return Task.CompletedTask;

    foreach(var clientSummary in clientConnectionSummaries)
       Task.Run(async () => await SendAsync(context,request,clientSummary), Lifetime.Finalizing)
            .NoWait(Logger);

    return Task.CompletedTask;
}

private async Task SendAsync(
  IDeliveryHandlerContext context,
  ClientNotifyRequestArguments request,
  MqttClientConnectionDto clientConnectionSummary)
{
    var signature = new EndpointSignature()
       .WithNamespace("client")
       .WithName(clientConnectionSummary.ID);

    await using var clientEndpoint = new RemoteEndpoint(Context, signature, default, Logger);

    var result = await clientEndpoint.Command(
         new NotifySendData
         {
             Message = request.Message,
             Theme = request.Theme,
             Event = request.Event
         },
         context.ToRequestParameters() );
}

private async Task SendAsync(
  IDeliveryHandlerContext context,
  ClientNotifyRequestArguments request,
  MqttClientConnectionDto clientConnectionSummary)
{
    var signature = new EndpointSignature()
       .WithNamespace("client")
       .WithName(clientConnectionSummary.ID);

    await using var clientEndpoint = new RemoteEndpoint(Context, signature, default, Logger);

    var result = await clientEndpoint.Command(
         new NotifySendData
         {
             Message = request.Message,
             Theme = request.Theme,
             Event = request.Event
         },
         context.ToRequestParameters() );
}

But I don't understand how I can add confirmation for messages. For example, I want to send a notification and see if a person has viewed it. Can someone give me an idea, how to make this?

9 Replies

JakenVeina•9mo ago

that's a very... broad question you obviously know how to send messages back and forth between your clients and server what part of "confirming that a notification was read" is your sticking point?

TOKYODRIFT!•9mo ago

hmmm maybe I just asked weird question you asked right questions! I can just send message to special topic in broker and wait for response on this topic but what if I need to constantly send messages until I get a signal that the message has been read? now I just run Task and don't await it ah! the main problem is I don't understand when I should read response it looks like long polling problem

JakenVeina•9mo ago

why would you use long polling? it's 2023, what browser do you need to support that doesn't support websockets?

TOKYODRIFT!•9mo ago

i mean "long polling" harold

I can send notification to message broker and vue.js will catch notification with websockets But I need to get response from client that notification has been read and I don't understand how to do it correctly All I can do rn is ask message broker about a new response on the right topic ah maybe I get the idea

JakenVeina•9mo ago

yes, I know you mean long-polling, that's why I asked why you would use it what is the "message broker" here? is that something running client-side?

TOKYODRIFT!•9mo ago

rabbitmq

JakenVeina•9mo ago

which means what?

TOKYODRIFT!•9mo ago

https://www.rabbitmq.com/ you can check this is a message broker which we use

JakenVeina•9mo ago

which does what?

Gaming

Programming

✅ How to get confirmation from user about reading the notification?