/// <summary>
/// Enqueue an email and store it into the database.
/// </summary>
/// <param name="mail">The mail to be enqueued.</param>
/// <returns>A <see cref="Task" /> representing the asynchronous operation, with the guid associated to the email.</returns>
public async Task <Guid> EnqueueAsync(Email mail)
{
var queuedEmail = new QueuedEmail();
queuedEmail.Id = Guid.NewGuid();
queuedEmail.Email = JsonConvert.SerializeObject(mail, Formatting.Indented);
using (var context = new QueuedEmailContext(this.ConnectionString))
{
await context.QueuedEmails.AddAsync(queuedEmail);
await context.SaveChangesAsync();
return(queuedEmail.Id);
}
}
/// <summary>
/// Send all mails in queue.
/// </summary>
/// <param name="client">Specify a custom smtp client to be used.</param>
/// <param name="waitTime">Wait time between emails, in milliseconds.</param>
public void SendQueuedMails(SmtpClient client = null, int waitTime = 0)
{
if (client == null)
{
client = new SmtpClient();
}
lock (LockSendMails)
{
using (var context = new QueuedEmailContext(this.ConnectionString))
{
var queuedEmails = context.QueuedEmails.Where(x => x.Sent == null).ToList();
foreach (var queuedEmail in queuedEmails)
{
var email = JsonConvert.DeserializeObject <Email>(queuedEmail.Email);
var message = new MailMessage();
message.From = new MailAddress(email.Sender);
message.Subject = email.Subject;
message.Body = email.Body;
message.IsBodyHtml = true;
if (email.ReplyTo != null)
{
message.ReplyToList.Add(new MailAddress(email.ReplyTo));
}
if (email.Recipients != null)
{
foreach (var recipient in email.Recipients)
{
message.To.Add(new MailAddress(recipient));
}
}
if (email.RecipientsCopy != null)
{
foreach (var recipientCopy in email.RecipientsCopy)
{
message.CC.Add(new MailAddress(recipientCopy));
}
}
if (email.RecipientsBlindCopy != null)
{
foreach (var recipientBlindCopy in email.RecipientsBlindCopy)
{
message.Bcc.Add(new MailAddress(recipientBlindCopy));
}
}
if (email.AdminCopy)
{
message.To.Add(new MailAddress(this.AdminEmail));
}
if (this.RedirectEmail)
{
var originalAddress = string.Join(", ", message.To.Select(x => x.Address));
message.Subject += " (" + originalAddress + ")";
message.To.Clear();
message.To.Add(new MailAddress(this.RedirectionAddress));
}
if (email.Attachments != null)
{
var attachments = JsonConvert.DeserializeObject <EmailAttachment[]>(email.Attachments);
foreach (var attachment in attachments)
{
var a = new Attachment(new MemoryStream(attachment.FileData), attachment.FileName);
message.Attachments.Add(a);
}
}
foreach (var customHeaderKey in this.CustomHeaders.AllKeys)
{
message.Headers.Add(customHeaderKey, this.CustomHeaders[customHeaderKey]);
}
try
{
client.Send(message);
queuedEmail.Sent = DateTime.Now;
queuedEmail.ResultMessage = null;
if (waitTime != 0)
{
Thread.Sleep(waitTime);
}
}
catch (SmtpException e)
{
queuedEmail.ResultMessage = e.ToString();
}
context.SaveChanges();
}
}
}
}
