(Swift 3,4,5...) Get the Email Received Date/Time

Get's the date/time from the topmost Received header. The date/time of when you received an email may be different than the date/time stored in the Date header field, which if truthful, is the date when the email was sent.

The Received header field will look something like this:

Received: from mail.example.com (mail.example.com [99.255.255.99])
 by inbound-smtp.us-west-2.amazonaws.com with SMTP id 72ma443vs1g0o6vqd8erojkpss35s0dt32h323o1
 for admin@chilkatsoft.com;
 Wed, 25 Jul 2018 08:04:23 +0000 (UTC)

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    let email = CkoEmail()!

    var success: Bool = email.loadEml("qa_data/eml/p.eml")
    if success != true {
        print("\(email.lastErrorText!)")
        return
    }

    let sb = CkoStringBuilder()!
    sb.append(email.getHeaderField("Received"))

    // Replace semicolons with CRLF's
    var numReplaced: Int = sb.replace(";", replacement: "\r\n").intValue

    let st = CkoStringTable()!
    st.append(fromSb: sb)

    if st.count.intValue == 0 {
        print("Should have at least one line..")
        return
    }

    // The date/time string is the last line in the string table.
    sb.setString(st.string(at: st.count.intValue - 1))
    sb.trim()

    print("Received date/time = \(sb.getAsString()!)")

}