(Swift 3,4,5...) Upload (Append) Email to an IMAP Mailbox and get the UID of the Appended Email

Upload / append an email to an IMAP mailbox and get the UID of the appended email.

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

func chilkatTest() {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let imap = CkoImap()!

    // Connect to an IMAP server.
    // Use TLS
    imap.ssl = true
    imap.port = 993
    var success: Bool = imap.connect("imap.someMailServer.com")
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Login
    success = imap.login("myLogin", password: "myPassword")
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Check the capabilities of the IMAP server.
    var cap: String? = imap.capability()
    print("IMAP capabilities: \(cap!)")

    // If the capabilities string contains the substring "UIDPLUS", then 
    // the UID of the appended email will be available in the AppendUid property (see below).

    // For example, the GMail IMAP server has these capabilities (at this current time)
    // * CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN 
    // X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT 
    // APPENDLIMIT=35882577 LIST-EXTENDED LIST-STATUS

    let email = CkoEmail()!

    // Load the email from a .eml file.
    success = email.loadEml("myEmail.eml")
    if success != true {
        print("\(email.lastErrorText!)")
        return
    }

    success = imap.appendMail("Inbox", email: email)
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // If the IMAP server supports the UIDPLUS extension, then the 
    // imap.AppendUid will contain the UID of the appended email.
    // Otherwise AppendUid will be 0.
    print("UID of appended email: \(imap.appendUid.intValue)")

    // If the IMAP server does NOT have UIDPLUS, then a program can 
    // first select the mailbox, get the value of the UidNext property,
    // and then append.  The appended email SHOULD have a UID equal to 
    // the UidNext that was obtained just prior to appending (assuming no other
    // program is simultaneously appending an email to the same mailbox).

    // Note: It is not required to select a mailbox to append.  The select is only
    // done for the purpose of obtaining the UIDNEXT value.
    success = imap.selectMailbox("Inbox")
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    var uidNext: Int = imap.uidNext.intValue

    success = imap.appendMail("Inbox", email: email)
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    print("The UID of the appended email SHOULD be \(uidNext)")

    print("Email uploaded to Inbox!")

    // Disconnect from the IMAP server.
    success = imap.disconnect()

}