Client.handleInteropMessage C# (CSharp) Method

    protected void handleInteropMessage(KLFCommon.PluginInteropMessageID id, byte[] data)
    {
        switch (id)
        {

            case KLFCommon.PluginInteropMessageID.CHAT_SEND:

                if (data != null)
                {
                    String line = encoder.GetString(data);

                    InTextMessage message = new InTextMessage();
                    message.fromServer = false;
                    message.message = "[" + clientSettings.username + "] " + line;
                    enqueueTextMessage(message, false);

                    handleChatInput(line);
                }

                break;

            case KLFCommon.PluginInteropMessageID.PLUGIN_DATA:

                String new_watch_player_name = String.Empty;

                if (data != null && data.Length >= 9)
                {
                    UnicodeEncoding encoder = new UnicodeEncoding();
                    int index = 0;

                    //Read current activity status
                    bool in_flight = data[index] != 0;
                    index++;

                    //Read current game title
                    int current_game_title_length = KLFCommon.intFromBytes(data, index);
                    index += 4;

                    currentGameTitle = encoder.GetString(data, index, current_game_title_length);
                    index += current_game_title_length;

                    //Send the activity status to the server
                    if (in_flight)
                        sendMessageTCP(KLFCommon.ClientMessageID.ACTIVITY_UPDATE_IN_FLIGHT, null);
                    else
                        sendMessageTCP(KLFCommon.ClientMessageID.ACTIVITY_UPDATE_IN_GAME, null);
                }
                break;

            case KLFCommon.PluginInteropMessageID.PRIMARY_PLUGIN_UPDATE:
                sendPluginUpdate(data, true);
                break;

            case KLFCommon.PluginInteropMessageID.SECONDARY_PLUGIN_UPDATE:
                sendPluginUpdate(data, false);
                break;

            case KLFCommon.PluginInteropMessageID.SCREENSHOT_SHARE:

                if (data != null)
                {
                    lock (screenshotOutLock)
                    {
                        queuedOutScreenshot = data;
                    }
                }

                break;

            case KLFCommon.PluginInteropMessageID.SCREENSHOT_WATCH_UPDATE:
                if (data != null && data.Length >= 8)
                {
                    int index = KLFCommon.intFromBytes(data, 0);
                    int current_index = KLFCommon.intFromBytes(data, 4);
                    String name = encoder.GetString(data, 8, data.Length - 8);

                    if (watchPlayerName != name || watchPlayerIndex != index)
                    {
                        watchPlayerName = name;
                        watchPlayerIndex = index;

                        //Look in the screenshot cache for the requested screenshot
                        Screenshot cached = getCachedScreenshot(watchPlayerIndex, watchPlayerName);
                        if (cached != null)
                            sendClientInteropMessage(KLFCommon.ClientInteropMessageID.SCREENSHOT_RECEIVE, cached.toByteArray());

                        sendScreenshotWatchPlayerMessage((cached == null), current_index, watchPlayerIndex, watchPlayerName);
                    }
                }
                break;

        }
    }