(Swift 2) Scan for Emails with Attachments and Save Attachments to Files

Scan for emails with attachments and save attachments.

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

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

    var messageSet: CkoMessageSet?
    // We can choose to fetch UIDs or sequence numbers.
    var fetchUids: Bool = true

    // Get the message IDs of all the emails in the mailbox
    messageSet = imap.Search("ALL", bUid: fetchUids)
    if imap.LastMethodSuccess != true {
        print("\(imap.LastErrorText)")
        return
    }

    // Fetch the email headers into a bundle object:
    var bundle: CkoEmailBundle?
    bundle = imap.FetchHeaders(messageSet)
    if imap.LastMethodSuccess != true {
        messageSet = nil
        print("\(imap.LastErrorText)")
        return
    }

    // Scan for emails with attachments, and save the attachments
    // to a sub-directory.
    var i: Int
    for i = 0; i <= bundle!.MessageCount.intValue - 1; i++ {
        var email: CkoEmail?
        email = bundle!.GetEmail(i)

        // Does this email have attachments?
        // Use GetMailNumAttach because the attachments
        // are not actually in the email object because
        // we only downloaded headers.
        // (Had we downloaded the full emails by
        // calling mailman.FetchBundle, we could look
        // at the email object's NumAttachments property.)
        var numAttach: Int = imap.GetMailNumAttach(email).intValue

        if numAttach > 0 {
            // Download the entire email and save the
            // attachments. (Remember, we 
            // need to download the entire email because
            // only the headers were previously downloaded.
            // If the entire emails were downloaded by
            // calling FetchBundle instead of FetchHeaders,
            // this would not be necessary.

            // The ckx-imap-uid header field is added when
            // headers are downloaded.  This makes it possible
            // to get the UID from the email object.
            var uidStr: String? = email!.GetHeaderField("ckx-imap-uid")
            var uid: Int = [uidStr intValue]

            var fullEmail: CkoEmail?
            fullEmail = imap.FetchSingle(uid, bUid: true)
            if imap.LastMethodSuccess == true {
                success = fullEmail!.SaveAllAttachments("attachmentsDir")
                fullEmail = nil
            }

            var j: Int
            for j = 0; j <= numAttach - 1; j++ {
                var filename: String? = imap.GetMailAttachFilename(email, attachIndex: j)
                print("\(filename!)")
            }

        }

        email = nil
    }

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

    messageSet = nil
    bundle = nil

}