(Swift 3,4,5...) Delete Email Individually (One at a time) from an IMAP Mailbox

Downloads email from an IMAP mailbox and deletes emails individually (one by one).

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
    }

    // 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 == false {
        print("\(imap.lastErrorText!)")
        return
    }

    // Fetch the emails into a bundle object:
    var bundle: CkoEmailBundle?
    bundle = imap.fetchBundle(messageSet)
    if imap.lastMethodSuccess == false {
        messageSet = nil
        print("\(imap.lastErrorText!)")
        return
    }

    // To mark a complete set of emails for deletion, call SetFlags:
    success = imap.setFlags(messageSet, flagName: "Deleted", value: 1)
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Messages can also be marked for deletion individually:
    // Loop over the bundle and mark each message for deletion.
    var i: Int = 0
    var numEmails: Int = bundle!.messageCount.intValue
    while i < numEmails {
        var email: CkoEmail? = bundle!.getEmail(i)
        print("\(email!.from!)")
        print("\(email!.subject!)")

        // To delete this email, set the "Deleted" flag to 1.
        // The email is not actually deleted until Expunge or
        // ExpungeAndClose is called.
        success = imap.setMailFlag(email, flagName: "Deleted", value: 1)
        if success != true {
            print("\(imap.lastErrorText!)")
            return
        }

        print("--")
        email = nil

        i = i + 1
    }

    success = imap.expungeAndClose()
    if success != true {
        print("\(imap.lastErrorText!)")
        messageSet = nil
        bundle = nil
        return
    }

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

    messageSet = nil
    bundle = nil

}