(Swift 3,4,5...) Delete All IMAP Email

Demonstrates two ways to delete all email in a mailbox on an IMAP 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()!

    // Turn on session logging:
    imap.keepSessionLog = true

    // 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.RubyMail")
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    var messageSet: CkoMessageSet?

    // Get the complete set of Uids for email in the selected mailbox.
    messageSet = imap.getAllUids()
    if imap.lastMethodSuccess != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Set the Deleted flag for each message.
    // (ExpungeAndClose must be called to finalize the delete.)
    success = imap.setFlags(messageSet, flagName: "Deleted", value: 1)
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Alternatively, the Deleted flag may be set for each UID
    // individiually, but this is less efficient:
    var i: Int
    var n: Int = messageSet!.count.intValue
    for i = 0; i <= n - 1; i++ {
        success = imap.setFlag(messageSet!.getId(i).intValue, bUid: messageSet!.hasUids, flagName: "Deleted", value: 1)
        if success != true {
            print("\(imap.lastErrorText!)")
            return
        }

    }

    // Expunge and close the mailbox.
    success = imap.expungeAndClose()
    if success != true {
        print("\(imap.lastErrorText!)")
        return
    }

    // Display the session log.
    print("\(imap.sessionLog!)")

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

    messageSet = nil

}