private async void FindAndReportLurkersAsync(string channel)
{
// TODO: Is there a better way to do or report performance data with Serilog?
var start = DateTime.Now;
var allUsers = await _client.GetUsersInChannelAsync(channel);
_logger.LogInformation("Time to get all users: {TimeInSeconds}", DateTime.Now - start);
var dbStart = DateTime.Now;
// TODO: Check the performance of this. May want to add a different call to GthxData
// that takes a list of users so this can be optimized to search the DB more efficiently
var lurkers = allUsers.Where(user => user != _botNick.BotNick &&
_data.GetLastSeen(user) == null);
_logger.LogInformation("Time to find lurkers: {TimeInSeconds}", DateTime.Now - start);
// Note: It doesn't matter that this doesn't limit the search to a single channel.
// If this instance of the bot shares a DB with other channels, it's because they want all
// the same info, so it's just okay that this counts people as saying something even
// if it's in a different channel.
_client.SendMessage(channel,
$"{lurkers.Count()} of the {allUsers.Count} users in {channel} right now have never said anything.");
}
