(Swift 3,4,5...) Fetch Single Email by UID or Sequence Number

Assuming the UID is known, download a single email by UID from an IMAP mail server.

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

func chilkatTest() {
    // This example requires 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("***", password: "***")
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Select an IMAP mailbox
    success = imap.selectMailbox("Inbox")
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    var email: CkoEmail?

    var uid: Int = 2014
    var isUid: Bool = true

    email = imap.fetchSingle(uid, bUid: isUid)
    if imap.lastMethodSuccess == true {

        // Display the From and Subject
        print("\(email!.fromAddress!)")
        print("\(email!.subject!)")

        // Display the Body property, which is the default body.
        // If an email has an HTML body, the Body property contains
        // the HTML source.  Otherwise it contains the plain-text
        // body.
        print("---- EMAIL BODY ----")
        print("\(email!.body!)")
        print("--------------------")

        // Display the recipients:
        var j: Int
        for j = 0; j <= email!.numTo.intValue - 1; j++ {
            print("\(email!.getToName(j)!), \(email!.getToAddr(j)!)")
        }

        for j = 0; j <= email!.numCC.intValue - 1; j++ {
            print("\(email!.getCcName(j)!), \(email!.getCcAddr(j)!)")
        }

        // Show the total size of the email, including body and attachments:
        print("\(email!.size.intValue)")

        // When a full email is downloaded, we would use the
        // email.NumAttachments property in conjunction with the
        // email.GetMailAttach* methods.
        // However, when an email object contains only the header,
        // we need to access the attachment info differently:
        var numAttach: Int = imap.getMailNumAttach(email).intValue
        print("\(numAttach)")

        for j = 0; j <= numAttach - 1; j++ {
            print("\(imap.getMailAttachFilename(email, attachIndex: j)!)")
            var attachSize: Int = imap.getMailAttachSize(email, attachIndex: j).intValue
            print("    size = \(attachSize) bytes")
        }

        print("--")
        email = nil
    }

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

}