/// <summary>
/// Adds the argument message as a local echo. When this local echo is resolved <see cref="PendingMessageResolved"/> will get called.
/// </summary>
/// <param name="message"></param>
public void AddLocalEcho(LocalEchoMessage message)
{
pendingMessages.Add(message);
Messages.Add(message);
NewMessagesArrived?.Invoke(new[] { message });
}
/// <summary>
/// Replace or remove a message from the channel.
/// </summary>
/// <param name="echo">The local echo message (client-side).</param>
/// <param name="final">The response message, or null if the message became invalid.</param>
public void ReplaceMessage(LocalEchoMessage echo, Message final)
{
if (!pendingMessages.Remove(echo))
{
throw new InvalidOperationException("Attempted to remove echo that wasn't present");
}
Messages.Remove(echo);
if (final == null)
{
MessageRemoved?.Invoke(echo);
return;
}
if (Messages.Contains(final))
{
// message already inserted, so let's throw away this update.
// we may want to handle this better in the future, but for the time being api requests are single-threaded so order is assumed.
MessageRemoved?.Invoke(echo);
return;
}
Messages.Add(final);
PendingMessageResolved?.Invoke(echo, final);
}
/// <summary>
/// Replace or remove a message from the channel.
/// </summary>
/// <param name="echo">The local echo message (client-side).</param>
/// <param name="final">The response message, or null if the message became invalid.</param>
public void ReplaceMessage(LocalEchoMessage echo, Message final)
{
if (!pendingMessages.Remove(echo))
{
throw new InvalidOperationException("Attempted to remove echo that wasn't present");
}
Messages.Remove(echo);
if (final == null)
{
MessageRemoved?.Invoke(echo);
return;
}
if (Messages.Contains(final))
{
throw new InvalidOperationException("Attempted to add the same message again");
}
Messages.Add(final);
PendingMessageResolved?.Invoke(echo, final);
}
/// <summary>
/// Posts a message to the currently opened channel.
/// </summary>
/// <param name="text">The message text that is going to be posted</param>
/// <param name="isAction">Is true if the message is an action, e.g.: user is currently eating </param>
/// <param name="target">An optional target channel. If null, <see cref="CurrentChannel"/> will be used.</param>
public void PostMessage(string text, bool isAction = false, Channel target = null)
{
if (target == null)
{
target = CurrentChannel.Value;
}
if (target == null)
{
return;
}
void dequeueAndRun()
{
if (postQueue.Count > 0)
{
postQueue.Dequeue().Invoke();
}
}
postQueue.Enqueue(() =>
{
if (!api.IsLoggedIn)
{
target.AddNewMessages(new ErrorMessage("Please sign in to participate in chat!"));
return;
}
var message = new LocalEchoMessage
{
Sender = api.LocalUser.Value,
Timestamp = DateTimeOffset.Now,
ChannelId = target.Id,
IsAction = isAction,
Content = text
};
target.AddLocalEcho(message);
// if this is a PM and the first message, we need to do a special request to create the PM channel
if (target.Type == ChannelType.PM && !target.Joined)
{
var createNewPrivateMessageRequest = new CreateNewPrivateMessageRequest(target.Users.First(), message);
createNewPrivateMessageRequest.Success += createRes =>
{
target.Id = createRes.ChannelID;
target.ReplaceMessage(message, createRes.Message);
dequeueAndRun();
};
createNewPrivateMessageRequest.Failure += exception =>
{
Logger.Error(exception, "Posting message failed.");
target.ReplaceMessage(message, null);
dequeueAndRun();
};
api.Queue(createNewPrivateMessageRequest);
return;
}
var req = new PostMessageRequest(message);
req.Success += m =>
{
target.ReplaceMessage(message, m);
dequeueAndRun();
};
req.Failure += exception =>
{
Logger.Error(exception, "Posting message failed.");
target.ReplaceMessage(message, null);
dequeueAndRun();
};
api.Queue(req);
});
// always run if the queue is empty
if (postQueue.Count == 1)
{
dequeueAndRun();
}
}