/// <summary>
/// Broadcasts a <see cref="ChatMessagePacket"/> to all currently logged-in users.
/// </summary>
/// <param name="senderUuid">Sender's UUID</param>
/// <param name="messageId">Message ID</param>
/// <param name="message">Message content</param>
/// <param name="timestamp">Timestamp</param>
/// <param name="excludedConnectionIds">Array of connection IDs to be excluded from the broadcast</param>
private void broadcastChatMessage(string senderUuid, string messageId, string message, DateTime timestamp, string[] excludedConnectionIds = null)
{
// Create and pack a ChatMessagePacket
ChatMessagePacket packet = new ChatMessagePacket
{
Uuid = senderUuid,
MessageId = messageId,
Message = message,
Timestamp = timestamp.ToTimestamp()
};
Any packedPacket = ProtobufPacketHelper.Pack(packet);
// Get an array of connection IDs for each logged in user
string[] connectionIds = userManager.GetConnections();
// Remove the connection IDs to be excluded from the broadcast (if any)
if (excludedConnectionIds != null)
{
connectionIds = connectionIds.Except(excludedConnectionIds).ToArray();
}
// Send it to each of the remaining connection IDs
foreach (string connectionId in connectionIds)
{
// Try send the chat message
if (!netServer.TrySend(connectionId, MODULE_NAME, packedPacket.ToByteArray()))
{
RaiseLogEntry(new LogEventArgs("Failed to send ChatMessagePacket to connection " + connectionId.Highlight(HighlightType.ConnectionID), LogLevel.ERROR));
}
}
}
/// <summary>
/// Handles incoming <see cref="ChatMessagePacket"/>s.
/// </summary>
/// <param name="connectionId">Original connection ID</param>
/// <param name="packet">Incoming packet</param>
private void chatMessagePacketHandler(string connectionId, ChatMessagePacket packet)
{
lock (messageHistoryLock)
{
// Store the message in chat history
messageHistory.Add(new ClientChatMessage(packet.MessageId, packet.Uuid, packet.Message, packet.Timestamp.ToDateTime(), ChatMessageStatus.CONFIRMED));
}
OnChatMessageReceived?.Invoke(this, new ChatMessageEventArgs(packet.Message, packet.Uuid, packet.Timestamp.ToDateTime()));
}
/// <summary>
/// Sends a message to the chat.
/// </summary>
/// <param name="message">Message</param>
/// <exception cref="ArgumentException">Message cannot be null or empty</exception>
public void Send(string message)
{
if (string.IsNullOrEmpty(message))
{
throw new ArgumentException("Message cannot be null or empty", nameof(message));
}
// Check if we aren't authenticated
if (!authenticator.Authenticated)
{
RaiseLogEntry(new LogEventArgs("Cannot send chat message: Not authenticated"));
return;
}
// Check if we aren't logged in
if (!userManager.LoggedIn)
{
RaiseLogEntry(new LogEventArgs("Cannot send chat message: Not logged in"));
return;
}
// Create a random message ID
string messageId = Guid.NewGuid().ToString();
// Create and store a chat message locally
ClientChatMessage localMessage = new ClientChatMessage(messageId, userManager.Uuid, message);
lock (messageHistoryLock)
{
messageHistory.Add(localMessage);
}
// Create and pack the chat message packet
ChatMessagePacket packet = new ChatMessagePacket
{
SessionId = authenticator.SessionId,
Uuid = userManager.Uuid,
MessageId = messageId,
Message = message
};
Any packedPacket = ProtobufPacketHelper.Pack(packet);
// Send it on its way
netClient.Send(MODULE_NAME, packedPacket.ToByteArray());
}
/// <summary>
/// Sends a <see cref="ChatMessagePacket"/> to the user.
/// </summary>
/// <param name="connectionId">Destination connection ID</param>
/// <param name="senderUuid">Sender's UUID</param>
/// <param name="messageId">Message ID</param>
/// <param name="message">Message content</param>
/// <param name="timestamp">Timestamp</param>
private void sendChatMessage(string connectionId, string senderUuid, string messageId, string message, DateTime timestamp)
{
// Create and pack our chat message packet
ChatMessagePacket packet = new ChatMessagePacket
{
MessageId = messageId,
Uuid = senderUuid,
Message = message,
Timestamp = timestamp.ToTimestamp()
};
Any packedPacket = ProtobufPacketHelper.Pack(packet);
// Send it on its way
if (!netServer.TrySend(connectionId, MODULE_NAME, packedPacket.ToByteArray()))
{
RaiseLogEntry(new LogEventArgs("Failed to send ChatMessagePacket to connection " + connectionId.Highlight(HighlightType.ConnectionID), LogLevel.ERROR));
}
}
/// <summary>
/// Handles incoming <see cref="ChatMessagePacket"/>s.
/// </summary>
/// <param name="connectionId">Original connection ID</param>
/// <param name="packet">Incoming <see cref="ChatMessagePacket"/></param>
private void chatMessagePacketHandler(string connectionId, ChatMessagePacket packet)
{
// Refuse packets from non-authenticated sessions
if (!authenticator.IsAuthenticated(connectionId, packet.SessionId))
{
sendFailedChatMessageResponse(connectionId, packet.MessageId);
// Stop here
return;
}
// Refuse packets from non-logged in users
if (!userManager.IsLoggedIn(connectionId, packet.Uuid))
{
sendFailedChatMessageResponse(connectionId, packet.MessageId);
// Stop here
return;
}
// Get a copy of the packet's original message ID
string originalMessageId = packet.MessageId;
// Generate a new, guaranteed-to-be-unique message ID since we can't trust clients
string newMessageId = Guid.NewGuid().ToString();
// Sanitise the message content
string sanitisedMessage = TextHelper.SanitiseRichText(packet.Message);
// Get the current time
DateTime timestamp = DateTime.UtcNow;
// Add the message to the message history
addMessageToHistory(new ChatMessage(newMessageId, packet.Uuid, sanitisedMessage, timestamp));
// Send a response to the sender
sendChatMessageResponse(connectionId, true, originalMessageId, newMessageId, sanitisedMessage);
// Broadcast the chat packet to everyone but the sender
broadcastChatMessage(packet.Uuid, newMessageId, sanitisedMessage, timestamp, new[] { connectionId });
}