/// <summary>
///
/// </summary>
/// <param name="course"></param>
/// <param name="user"></param>
/// <returns>a lookup true = successfully emailed, false = email failed</returns>
public static async Task<ILookup<bool, CourseParticipant>> SendEmail(Course course, IPrincipal user)
{
using (var cal = Appointment.CreateCourseAppointment(course, user.Identity))
{
using (var appt = new AppointmentStream(cal))
{
var map = ((Expression<Func<CourseParticipant, CourseParticipantDto>>)new CourseParticipantMaps().MapToDto).Compile();
var faculty = course.CourseParticipants.Where(cp => !map(cp).IsEmailed)
.ToLookup(cp => cp.IsFaculty);
IEnumerable<Attachment> attachments = new Attachment[0];
using (var client = new SmtpClient())
{
var mailMessages = new List<ParticipantMail>();
var sendMail = new Action<CourseParticipant>(cp =>
{
var mail = new MailMessage();
mail.To.AddParticipants(cp.Participant);
var confirmEmail = new CourseInvite { CourseParticipant = cp };
mail.CreateHtmlBody(confirmEmail);
appt.AddAppointmentsTo(mail);
foreach (var a in attachments)
{
a.ContentStream.Position = 0;
mail.Attachments.Add(a);
}
mailMessages.Add(new ParticipantMail { Message = mail, SendTask = client.SendMailAsync(mail), CourseParticipant = cp });
});
foreach (var cp in faculty[false])
{
sendMail(cp);
}
if (faculty[true].Any())
{
if (course.FacultyMeetingUtc.HasValue)
{
using (var fm = Appointment.CreateFacultyCalendar(course))
{
appt.Add(fm);
}
}
attachments = GetFilePaths(course).Select(fp => new Attachment(fp.Value, System.Net.Mime.MediaTypeNames.Application.Zip) { Name = fp.Key })
.Concat(new[] { new Attachment(CreateDocxTimetable.CreateTimetableDocx(course, WebApiConfig.DefaultTimetableTemplatePath), OpenXmlDocxExtensions.DocxMimeType) { Name = CreateDocxTimetable.TimetableName(course)} });
foreach (var cp in faculty[true])
{
sendMail(cp);
}
}
await Task.WhenAll(mailMessages.Select(mm => mm.SendTask));
mailMessages.ForEach(mm => mm.Message.Dispose());
return mailMessages.ToLookup(k => k.SendTask.Status == TaskStatus.RanToCompletion, v => v.CourseParticipant);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="course"></param>
/// <returns>a lookup true = successfully emailed, false = email failed</returns>
public static async Task <EmailResult <CourseParticipant> > SendCourseEmail(Course course, ApplicationUserManager userManager, DateTime?originalDate = null)
{
var map = ((Expression <Func <CourseParticipant, CourseParticipantDto> >) new CourseParticipantMaps().MapToDto).Compile();
var faculty = course.CourseParticipants.Where(cp => map(cp).IsEmailed == originalDate.HasValue)
.ToLookup(cp => cp.IsFaculty);
var attachments = new List <Attachment>();
string timetableName = CreateDocxTimetable.TimetableName(course);
var participantTimetable = CreateDocxTimetable.CreateTimetableDocx(course, WebApiConfig.DefaultTimetableTemplatePath, false);
if (course.CourseFormat.CourseType.SendCandidateTimetable)
{
attachments.Add(new Attachment(Stream.Synchronized(participantTimetable), OpenXmlDocxExtensions.DocxMimeType)
{
Name = timetableName
});
}
attachments.AddRange(GetInviteReadings(course));
var success = new ConcurrentBag <CourseParticipant>();
var fail = new ConcurrentBag <CourseParticipant>();
using (var parallelEmails = new ParallelSmtpEmails(disposeMsgOnComplete: false))
{
List <MailMessage> messages = new List <MailMessage>(course.CourseParticipants.Count);
var sendMail = new Func <CourseParticipant, Task>(async cp =>
{
var mail = new MailMessage();
messages.Add(mail);
mail.To.AddParticipants(cp.Participant);
string token = await userManager.GenerateUserTokenAsync(InvitePurpose(cp.CourseId), cp.ParticipantId);
var confirmEmail = new CourseInvite {
CourseParticipant = cp, OldStart = originalDate, Token = token
};
mail.CreateHtmlBody(confirmEmail);
foreach (var a in attachments)
{
//a.ContentStream.Position = 0;
mail.Attachments.Add(a);
}
parallelEmails.Send(mail, s =>
{
if (s == null)
{
success.Add(cp);
}
else
{
fail.Add(cp);
}
});
});
foreach (var f in faculty[false])
{
await sendMail(f);
}
MemoryStream facultyTimetable = null;
if (faculty[true].Any())
{
attachments = new List <Attachment>();
facultyTimetable = CreateDocxTimetable.CreateTimetableDocx(course, WebApiConfig.DefaultTimetableTemplatePath, true);
attachments.Add(new Attachment(Stream.Synchronized(facultyTimetable), OpenXmlDocxExtensions.DocxMimeType)
{
Name = timetableName
});
attachments.AddRange(GetFilePaths(course)
.Select(fp => new Attachment(Stream.Synchronized(fp.Value.ToStream()), System.Net.Mime.MediaTypeNames.Application.Zip)
{
Name = fp.Key
}));
foreach (var f in faculty[true])
{
await sendMail(f);
}
}
await parallelEmails.SendingComplete();
messages.ForEach(m => m.Dispose());
participantTimetable.Dispose();
facultyTimetable?.Dispose();
}
return(new EmailResult <CourseParticipant> {
SuccessRecipients = success.ToArray(),
FailRecipients = fail.ToArray()
});
}
