///<summary>Used for creating encrypted Message Disposition Notification (MDN) ack messages for Direct.
///An ack must be sent when a message is received/processed, and other acks are supposed be sent when other events occur (but are not required).
///For example, when the user reads a decrypted message we must send an ack with notification type of Displayed (not required).</summary>
private static string SendAckDirect(Health.Direct.Agent.IncomingMessage inMsg,EmailAddress emailAddressFrom,long patNum) {
//No need to check RemotingRole; no call to db.
//The CreateAcks() function handles the case where the incoming message is an MDN, in which case we do not reply with anything.
//The CreateAcks() function also takes care of figuring out where to send the MDN, because the rules are complicated.
//According to http://wiki.directproject.org/Applicability+Statement+for+Secure+Health+Transport+Working+Version#x3.0%20Message%20Disposition%20Notification,
//The MDN must be sent to the first available of: Disposition-Notification-To header, MAIL FROM SMTP command, Sender header, From header.
Health.Direct.Common.Mail.Notifications.MDNStandard.NotificationType notificationType=Health.Direct.Common.Mail.Notifications.MDNStandard.NotificationType.Failed;
notificationType=Health.Direct.Common.Mail.Notifications.MDNStandard.NotificationType.Processed;
IEnumerable<Health.Direct.Common.Mail.Notifications.NotificationMessage> notificationMsgs=inMsg.CreateAcks("OpenDental "+Assembly.GetExecutingAssembly().GetName().Version,"",notificationType);
if(notificationMsgs==null) {
return "";
}
string strErrorsAll="";
foreach(Health.Direct.Common.Mail.Notifications.NotificationMessage notificationMsg in notificationMsgs) {
string strErrors="";
try {
//According to RFC3798, section 3 - Format of a Message Disposition Notification http://tools.ietf.org/html/rfc3798#page-3
//A message disposition notification is a MIME message with a top-level
//content-type of multipart/report (defined in [RFC-REPORT]). When
//multipart/report content is used to transmit an MDN:
//(a) The report-type parameter of the multipart/report content is "disposition-notification".
//(b) The first component of the multipart/report contains a human-readable explanation of the MDN, as described in [RFC-REPORT].
//(c) The second component of the multipart/report is of content-type message/disposition-notification, described in section 3.1 of this document.
//(d) If the original message or a portion of the message is to be returned to the sender, it appears as the third component of the multipart/report.
// The decision of whether or not to return the message or part of the message is up to the MUA generating the MDN. However, in the case of
// encrypted messages requesting MDNs, encrypted message text MUST be returned, if it is returned at all, only in its original encrypted form.
Health.Direct.Agent.OutgoingMessage outMsgDirect=new Health.Direct.Agent.OutgoingMessage(notificationMsg);
if(notificationMsg.ToValue.Trim().ToLower()==notificationMsg.FromValue.Trim().ToLower()) {
continue;//Do not send an ack to self.
}
EmailMessage emailMessage=ConvertMessageToEmailMessage(outMsgDirect.Message,false);
emailMessage.PatNum=patNum;
//First save the ack message to the database in case their is a failure sending the email. This way we can remember to try and send it again later, based on SentOrRecieved.
emailMessage.SentOrReceived=EmailSentOrReceived.AckDirectNotSent;
MemoryStream ms=new MemoryStream();
notificationMsg.Save(ms);
byte[] arrayMdnMessageBytes=ms.ToArray();
emailMessage.BodyText=Encoding.UTF8.GetString(arrayMdnMessageBytes);
ms.Dispose();
Insert(emailMessage);
}
catch(Exception ex) {
strErrors=ex.Message;
}
if(strErrorsAll!="") {
strErrorsAll+="\r\n";
}
strErrorsAll+=strErrors;
}
try {
SendOldestUnsentAck(emailAddressFrom);//Send the ack(s) we created above.
}
catch {
//Not critical to send the acks here, because they will be sent later if they failed now.
}
return strErrorsAll;
}