public IActionResult Chat(ChatModel model)
{
var outModel = new ChatModel();
// Check if we have the ChatEntries queue initialized
var chatEntriesQueue = HttpContext.Session.Get <Queue <ChatEntry> >("ChatEntriesQueue");
if (chatEntriesQueue == null)
{
// Initialize the queue
chatEntriesQueue = new Queue <ChatEntry>();
}
if (ModelState.IsValid)
{
// Add the entry to the queue
var newChat = new ChatEntry {
DatePosted = DateTime.UtcNow, Text = model.ChatText, WhoPosted = User.Identity.Name
};
_model.BasicPublish(ExchangeName, "chat", null, newChat.Serialize());
}
// Connect to our rabbit queue and retrieve messages
_model.BasicQos(prefetchSize: 0, prefetchCount: 10, global: false);
var queueName = $"Chat_{User.Identity.Name}_Queue";
var _consumer = new QueueingBasicConsumer(_model);
_model.BasicConsume(queue: queueName, autoAck: false, _consumer);
while (true)
{
if (!_consumer.Queue.Dequeue(millisecondsTimeout: 100, out var result))
{
break;
}
var message = (ChatEntry)result.Body.DeSerialize(typeof(ChatEntry));
// Check for stock commands
if (!message.Text.StartsWith("/stock=", StringComparison.InvariantCultureIgnoreCase))
{
chatEntriesQueue.Enqueue(new ChatEntry {
DatePosted = message.DatePosted, Text = message.Text, WhoPosted = message.WhoPosted
});
}
// Acknowledge
_model.BasicAck(result.DeliveryTag, false);
}
// Take the last 50 entries of the local queue
outModel.ChatEntries = chatEntriesQueue.TakeLast(50).ToList();
// Remove old ones
while (chatEntriesQueue.Count > 50)
{
chatEntriesQueue.Dequeue();
}
// Add the local queue back to the session
HttpContext.Session.Set <Queue <ChatEntry> >("ChatEntriesQueue", chatEntriesQueue);
return(View(outModel));
}
/// <summary>
/// Send a message to the exchange with a stock quote
/// </summary>
/// <param name="channel">Channel</param>
/// <param name="symbol">Stock symbol</param>
/// <param name="quote">Stock Quote value</param>
private static void PostStockQuoteAsBot(IModel channel, string symbol, string quote)
{
try
{
var message = new ChatEntry {
DatePosted = DateTime.UtcNow, Text = $"{symbol} quote is ${quote} per share", WhoPosted = BotName
};
channel.BasicPublish(ExchangeName, "bot", null, message.Serialize());
Console.WriteLine($"Bot Sent {message.Text}");
}
catch (Exception ex)
{
// Nothing to do here
Console.WriteLine($"The bot had an issue posting to the queue: {ex.Message}");
}
}
private static void SendMessage(ChatEntry message)
{
_model.BasicPublish(ExchangeName, "chat", null, message.Serialize());
Console.WriteLine($"Message Sent by {message.WhoPosted}: {message.Text}");
}