private PlotModel _createChart(SlackChannel channel)
{
PlotModel chart = new PlotModel {
LegendPosition = LegendPosition.RightTop, LegendPlacement = LegendPlacement.Outside
};
chart.Axes.Add(new LinearAxis {
Position = AxisPosition.Left, Minimum = 40, Maximum = 110
});
foreach (KeyValuePair <SlackUser, List <bool> > pair in _data[channel])
{
LineSeries series = new LineSeries {
MarkerType = MarkerType.Circle
};
int numberOfTimesThere = 0;
for (int j = 0; j < pair.Value.Count; j++)
{
numberOfTimesThere += pair.Value[j] ? 1 : 0;
DataPoint nextPoint = new DataPoint(j + 1, (float)numberOfTimesThere * 100 / (j + 1));
series.Points.Add(nextPoint);
}
series.Title = pair.Key.Name + " (" + Math.Round(series.Points.Last().Y, 2) + "%)";
chart.Series.Add(series);
}
return(chart);
}
/// <summary>Sends a message to a given slack channel</summary>
/// <param name="channel">Slack channel to send the message to</param>
/// <param name="message">Message to send to the channel, this supports slack message formatting</param>
public void SendMessage(SlackChannel channel, string message)
{
JObject parameters = new JObject
{
{ "channel", channel.Id },
{ "text", message },
{ "username", "attendancebot" }
};
ApiCall("chat.postMessage", parameters);
}
private void helpCommand(SlackMessage message, SlackChannel channel)
{
string text = String.Format("The commands you need to know are:" +
"\n •`<@{0}|{1}> help` to show this message" +
"\n •`<@{0}|{1}> keep [users *not* attending]` to register attendance at a meeting" +
"\n •`<@{0}|{1}> reset` to reset all information about attendance in this channel. Be careful. This *can not* be undone" +
"\n •`<@{0}|{1}> revert` to remove the last registered meeting" +
"\n •`<@{0}|{1}> redo [meeting number]` to re-register a meeting (starts at 1!)" +
"\n •`<@{0}|{1}> image` to get a chart showing the latest attendance information", BotId, Name);
SendMessage(channel, text);
}
private void _trackUsers(SlackMessage message, SlackChannel channel)
{
if (!_isTracking(channel))
{
_data.Add(channel, new AttendanceData());
}
List <SlackUser> usersFromMessage = _getUsersFromMessage(message, 2);
int numberOfMeetings = _data[channel].Any() ? _data[channel].First().Value.Count : 0;
_data[channel].Add(numberOfMeetings, usersFromMessage.ToArray());
saveData();
}
private void _countAttendance(SlackMessage message, SlackChannel channel)
{
var c = _createChart(channel);
string fileName = Path.GetTempPath() + Guid.NewGuid() + ".png";
using (var stream = File.Create(fileName))
{
var svgExporter = new PngExporter {
Width = 600, Height = 400
};
svgExporter.Export(c, stream);
}
SlackSendFile(channel, fileName, "attendance");
}
private void _keepAttendance(SlackMessage message, SlackChannel channel)
{
List <SlackUser> usersNotThere = null;
try
{
usersNotThere = _getUsersFromMessage(message, 2);
}
catch (ArgumentException e)
{
SendMessage(channel, e.Message);
return;
}
_data[channel].Update(usersNotThere);
_countAttendance(message, channel);
saveData();
}
private void _parseMessage(object sender, MessageEventArgs e)
{
string jsonString = e.Data;
JObject message = JObject.Parse(jsonString);
if (_isMessage(message) && !_isFromSelf(message))
{
OnMessage?.Invoke(this, new SlackMessage((string)message["text"],
_getUserFromId((string)message["user"])),
_getChannelFromId((string)message["channel"]));
}
else if (_isChannelJoined(message))
{
SlackChannel channel = _getChannelFromId((string)message["channel"]["id"]);
OnChannelJoined?.Invoke(this, channel);
}
}
private void _redoAttendance(SlackMessage message, SlackChannel channel)
{
List <SlackUser> usersInMessage = _getUsersFromMessage(message, 3);
try
{
int meeting = int.Parse(message.Text.Split(' ')[2]) + 1;
foreach (KeyValuePair <SlackUser, List <bool> > pair in _data[channel])
{
pair.Value[meeting] = !usersInMessage.Contains(pair.Key);
}
_countAttendance(message, channel);
}
catch (InvalidOperationException)
{
SendMessage(channel, "That is not a meeting I know of");
}
catch (IndexOutOfRangeException)
{
SendMessage(channel, "You haven't had that meeting yet");
}
}
private void _parseMessage(object sender, SlackMessage message, SlackChannel channel)
{
if (!message.Text.StartsWith($"<@{BotId}>"))
{
return;
}
if (!_isTracking(channel))
{
_data.Add(channel, new AttendanceData());
}
Dictionary <string, Delegate> commands = new Dictionary <string, Delegate>()
{
{ "help", new Action <SlackMessage, SlackChannel>(helpCommand) },
{ "keep", new Action <SlackMessage, SlackChannel>(_keepAttendance) },
{ "track", new Action <SlackMessage, SlackChannel>(_trackUsers) },
{ "image", new Action <SlackMessage, SlackChannel>(_countAttendance) },
{ "reset", new Action <SlackMessage, SlackChannel>(_resetChannel) },
{ "revert", new Action <SlackMessage, SlackChannel>(_revertAttendance) },
{ "redo", new Action <SlackMessage, SlackChannel>(_redoAttendance) }
};
string[] msgParts = message.Text.Split(' ');
try
{
commands[msgParts[1]].Method.Invoke(this, new object[] { message, channel });
}
catch (KeyNotFoundException)
{
SendMessage(channel, "I do not understand that command.");
}
catch (IndexOutOfRangeException)
{
SendMessage(channel, "I do not understand that command.");
}
}
private bool _isTracking(SlackChannel channel)
{
return(_data.ContainsKey(channel));
}
private void _revertAttendance(SlackMessage message, SlackChannel channel)
{
_data[channel].RemoveMeeting(_data[channel].Count - 1);
}
private void _resetChannel(SlackMessage message, SlackChannel channel)
{
_data[channel] = new AttendanceData();
saveData();
}
public override bool Equals(object obj)
{
SlackChannel slackChannel = obj as SlackChannel;
return(slackChannel != null && Name.Equals(slackChannel.Name));
}
public List <SlackUser> GetUsersFromChannel(SlackChannel channel)
{
return(channel.Members.Select(_getUserFromId).ToList());
}
/// <summary>Uploads a file to a slack channel</summary><
/// <param name="channel">Channel to upload the file in</param>
/// <param name="path">Path to the file to upload</param>
/// <param name="filename">Filename for the uploaded file on slack</param>
public void SlackSendFile(SlackChannel channel, string path, string filename)
{
WebClient wc = new WebClient();
wc.UploadFile("https://slack.com/api/files.upload?token=" + _token + "&filename=" + filename + "&channels=" + channel.Id, path);
}