/// <summary>
/// Gets valid gift candidates for this participant
/// </summary>
private static IList <Participant> GetCandidatesForParticipant(Participant from)
{
var candidates = new List <Participant>(_participants);
candidates.Remove(from);
var alreadyReceiving = _matches.Select(m => m.To).ToArray();
var gifter = _matches.Where(f => f.To == from).Select(t => t.From).FirstOrDefault();
foreach (var p in _participants.Where(p => alreadyReceiving.Contains(p) || p == gifter))
{
candidates.Remove(p);
}
if (_settings.BadMatchGroups != null)
{
foreach (var group in _settings.BadMatchGroups)
{
if (group.Contains(from.Email))
{
foreach (var exclusion in group)
{
candidates.Remove(_participants.GetParticipantByEmail(exclusion));
}
}
}
}
return(candidates);
}
private static void Main(string[] args)
{
if (args == null || !args.Any())
{
Console.Error.WriteLine("Specify a .json settings file path as the first argument.");
return;
}
string smtpHost = Environment.GetEnvironmentVariable("SMTP_HOST")?.Trim();
string smtpUser = Environment.GetEnvironmentVariable("SMTP_USER")?.Trim();
string smtpPass = Environment.GetEnvironmentVariable("SMTP_PASS")?.Trim();
string wishListLink = Environment.GetEnvironmentVariable("WISHLIST_LINK")?.Trim();
if (string.IsNullOrEmpty(smtpHost) ||
string.IsNullOrEmpty(smtpUser) ||
string.IsNullOrEmpty(smtpPass) ||
string.IsNullOrEmpty(wishListLink))
{
Console.Error.WriteLine("Please specify the following environment variables: SMTP_HOST, SMTP_USER, SMTP_PASS, WISHLIST_LINK");
return;
}
try
{
_settings = Settings.Load(args[0]);
_participants = _settings.Participants;
// Main selection loop
while (true)
{
// Pre-matches
var preSelectedGivers = new List <Participant>();
if (_settings.PreMatches != null)
{
foreach (var match in _settings.PreMatches)
{
var from = _participants.GetParticipantByEmail(match.FromEmail);
var to = _participants.GetParticipantByEmail(match.ToEmail);
_matches.Add(new Match(from, to));
preSelectedGivers.Add(from);
}
}
// Random matches
var r = new Random();
bool reset = false;
foreach (var from in _participants.Except(preSelectedGivers))
{
var candidates = GetCandidatesForParticipant(from);
if (!candidates.Any())
{
// Bad run, reset and try again
reset = true;
break;
}
var to = candidates[r.Next(0, candidates.Count)]; // Choose a receiver at random
_matches.Add(new Match(from, to));
}
if (reset)
{
Console.WriteLine("Bad run, trying again...");
_matches.Clear();
continue;
}
// Sanity check
if (_matches.Count != _participants.Count)
{
Console.Error.WriteLine("Something really weird happened, trying again...");
_matches.Clear();
continue;
}
break;
}
Console.WriteLine("Matches selected! Sending emails...");
Console.WriteLine();
// Send mail
var smtpClient = new SmtpClient(smtpHost)
{
Credentials = new NetworkCredential(smtpUser, smtpPass),
EnableSsl = true
};
Email.DefaultSender = new SmtpSender(smtpClient);
foreach (var match in _matches)
{
Console.WriteLine($"Sending email to {match.From.Email}...");
var email = Email.From(smtpUser)
.To(match.From.Email)
.Subject($"Hey {match.From.Name}! Your secret santa has been chosen.")
.Body($"Your secret santa recipient this year is <b>{match.To.Name}</b>!<br><br><img src=\"{match.To.ImageUrl}\" alt=\"{match.To.Name}\"/><br><br>To see their wishlist and to fill out your own, go here!: <a href=\"{wishListLink}\" _target=\"blank\">{wishListLink}</a>", isHtml: true)
.Send();
if (email.Successful)
{
Console.WriteLine($"Sent email to {match.From.Email}.");
}
else
{
Console.Error.WriteLine($"Failed to send to {match.From.Email}. Errors: {string.Join(", ", email.ErrorMessages)}");
}
}
Console.WriteLine();
Console.WriteLine("Done!");
}
catch (Exception e)
{
Console.Error.WriteLine($"{e.GetType().Name}: {e.Message}");
}
}
