Typing Indicators

All official SDKs support typing events out of the box and are handled on all channels with the typing_events featured enabled. Typing indicators allow you to show to users who is currently typing in the channel. This feature can be switched on/off on a channel-type basis using the CLI or directly from the Dashboard. If you are using one of the official SDK libraries, you will only need to ensure that typing indicators are enabled to get this working.

If you are building your UI on top of one of our Chat Clients instead, you will need to take care of four things:

1. Send an event typing.start when the user starts typing

2. Send an event typing.stop after the user stopped typing

3. Handle the two events and use them to toggle the typing indicator UI

4. Use parent_id field of the event to indicate that typing is happening in a thread

Sending start and stop typing events

// Send typing started event
await channel.SendTypingStartedEventAsync();

// Send typing stopped event
await channel.SendTypingStoppedEventAsync();

// The JS client keeps track of the typing state for you.
// Just call `channel.keystroke()` when the user types and 
// `channel.stopTyping()` when the user sends the message (or aborts)

// sends a typing.start event at most once every two seconds
await channel.keystroke();

// sends a typing.start event for a particular thread
await channel.keystroke(thread_id);

// sends the typing.stop event 
await channel.stopTyping();

// The Dart client keeps track of the typing state for you.
// Just call `channel.keystroke()` when the user types and 
// `channel.stopTyping()` when the user sends the message (or aborts)

// sends a typing.start event at most once every two seconds
await channel.keystroke();

// sends a typing.start event for a particular thread
await channel.keystroke(thread_id);

// sends the typing.stop event 
await channel.stopTyping();

// Sends a typing.start event at most once every two seconds
channelClient.keystroke().enqueue()

// Sends a typing.start event for a particular thread
channelClient.keystroke(parentId = "threadId").enqueue()

// Sends the typing.stop event
channelClient.stopTyping().enqueue()// Automatically

// The Swift client keeps track of the typing state for you.
// Just call `sendKeystrokeEvent()` when the user types and 

// sends a typing.start event at most once every two seconds
// automatically sends typingStop event after 15 seconds
let channelController = client.channelController(for: .init(type: .messaging, id: "general"))

// automatically
channelController.sendKeystrokeEvent()

// or manually
channelController.sendStartTypingEvent()
channelController.sendStopTypingEvent()

// The Unreal SDK keeps track of the typing state for you.
// Just call `Channel->Keystroke()` when the user types and
// `Channel->StopTyping()` when the user sends the message (or aborts)

// Sends a typing.start event at most once every two seconds,
// and a typing.stop event two seconds after the last keystroke
Channel->KeyStroke();

// Manually sends the typing.stop event, and cancels any pending
// typing.stop event queued by Keystroke()
Channel->StopTyping();

// Sends a typing.start event
channelClient.keystroke().enqueue();

// Sends a typing.start event for a particular thread
channelClient.keystroke("threadId").enqueue();

// Sends the typing.stop event
channelClient.stopTyping().enqueue();

When sending events on user input, you should make sure to follow some best-practices to avoid bugs.

1. Only send typing.start when the user starts typing

2. Send typing.stop after a few seconds since the last keystroke

Receiving typing indicator events

public async Task ReceivingTypingEvents()
{
  var channel = await Client.GetOrCreateChannelWithIdAsync(ChannelType.Messaging, "channel-id");
  channel.UserStartedTyping += OnUserStartedTyping;
  channel.UserStoppedTyping += OnUserStoppedTyping;
}

private void OnUserStartedTyping(IStreamChannel channel, IStreamUser user)
{
}

private void OnUserStoppedTyping(IStreamChannel channel, IStreamUser user)
{
}

// channels keep track of the users that are currently typing.
// `channel.state.typing` is an immutable object which gets regenerated
// every time a new user is added or removed to this list
console.log(channel.state.typing);

// start typing event handling
channel.on('typing.start', event => {
 if (event.parent_id) {
  console.log(`${event.user.name} started typing in thread ${event.parent_id}`);
 } else {
  console.log(`${event.user.name} started typing`);
 }
});

// stop typing event handling
channel.on('typing.stop', event => {
 if (event.parent_id) {
  console.log(`${event.user.name} stopped typing in thread ${event.parent_id}`);
 } else {
  console.log(`${event.user.name} stopped typing`);
 }
});

// channels keep track of the users that are currently typing
// the `channel.state.typingEvents` is an immutable object which gets regenerated
// every time a new user is added or removed to this list
print(channel.state.typingEvents);

// add typing start event handling
channel.on('typing.start', (event) => {
 print('${event.user.name} started typing');
});

// add typing stop event handling
channel.on('typing.stop', event => {
 print('${event.user.name} stopped typing');
});

// Add typing start event handling
channelClient.subscribeFor<TypingStartEvent> { typingStartEvent ->
  // Handle event
}

// Add typing stop event handling
channelClient.subscribeFor<TypingStopEvent> { typingStopEvent ->
  // Handle event
}

let channelController = client.channelController(for: .init(type: .messaging, id: "general"))

class ChannelDelegate: ChatChannelControllerDelegate {
  func channelController(_ channelController: ChatChannelController,
              didChangeTypingUsers typingUsers: Set<ChatUser>) {
    // handle new typing users
  }
}
  

channelController.delegate = ChannelDelegate()

channelController.synchronize()

// You can manually subscribe to the typing channel events
Channel->On<FTypingStartEvent>(this, &UMyWidget::OnTypingStart);
Channel->On<FTypingStopEvent>(this, &UMyWidget::OnTypingStop);

// Alternatively you can bind to the OnTypingIndicator delegate (also from Blueprints)
Channel->OnTypingIndicator.AddDynamic(this, &UMyWidget::OnTypingIndicator);

// Add typing start event handling
channelClient.subscribeFor(
   new Class[]{TypingStartEvent.class},
   event -> {
     // Handle change
   }
);

// Add typing stop event handling
channelClient.subscribeFor(
   new Class[]{TypingStopEvent.class},
   event -> {
     // Handle change
   }
);

Control typing events delivery by modifying user privacy settings

Please take into account that typing.start and typing.stop events delivery can be controlled by user privacy settings:

// user object with privacy settings where typing indicators are disabled
{
 // other user fields
 "privacy_settings": {
  "typing_indicators": {
   "enabled": false
  }
 }
}

If privacy_settings.typing_indicators.enabled is set to false, then typing.start and typing.stop events will be ignored for this user by Stream’s server and these events will not be sent to other users. In other words other users will not know that the current user was typing.