(Swift) Process New Email by Scanning for Senders

Scan email and save application-selected emails to EML files with unique filenames.

Note: This example requires Chilkat v11.0.0 or greater.

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

func chilkatTest() {
    var success: Bool = false

    // 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
    success = imap.connect("imap.someMailServer.com")
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

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

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

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

    // Fetch messages from the mailbox using a search criteria.
    // This example finds NEW emails: these are emails that have the RECENT flag set, but not the SEEN flag:
    let messageSet = CkoMessageSet()!
    success = imap.queryMbx("NEW", bUid: fetchUids, msgSet: messageSet)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // This example will download headers, and then download
    // the full email for those emails sent from a contact
    // in our database.

    // When downloading headers, each email object contains
    // (obviously) the headers, but the body will be missing.
    // Also, attachments will not be included.  However, it is
    // possible to get information about the attachments
    // as well as the complete size of the email.
    let bundle = CkoEmailBundle()!
    var headersOnly: Bool = true
    success = imap.fetchMsgSet(headersOnly, msgSet: messageSet, bundle: bundle)
    if success == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Loop over the email objects...
    let emailHeader = CkoEmail()!
    let fullEmail = CkoEmail()!
    var i: Int = 0
    var numEmails: Int = bundle.messageCount.intValue
    while i < numEmails {
        bundle.email(at: i, email: emailHeader)

        // The sender's email address and name are available
        // in the From, FromAddress, and FromName properties.
        // If the sender is "Chilkat Support <support@chilkatsoft.com",
        // then the From property will hold the entire string.
        // the FromName property contains"Chilkat Support",
        // and the FromAddress property contains "support@chilkatsoft.com"
        print("\(emailHeader.from!)")
        print("\(emailHeader.fromAddress!)")
        print("\(emailHeader.fromName!)")

        // Assume at this point your code checks to see if the sender
        // is one in your contacts database.  If so, this is
        // the code you would write to download the entire
        // email and save it to a file.

        // 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? = emailHeader.getHeaderField("ckx-imap-uid")
        var uid: Int = [uidStr intValue]

        success = imap.fetchEmail(false, msgId: uid, bUid: true, email: fullEmail)
        if success == false {
            print("\(imap.lastErrorText!)")
            return
        }

        // You can use the GenerateFilename method to
        // generate a unique filename...
        var filename: String? = fullEmail.generateFilename()

        // SaveEml saves the entire email, including attachments.
        success = fullEmail.saveEml(filename)

        print("--")

        i = i + 1
    }

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

}