(Swift) Determine the Number of Unseen Email Messages

Demonstrates how to determine how many unseen messages exist in an email account 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()!

    // 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
    }

    // After selecting the mailbox. the total number of emails
    // is immediately available:
    var totalNum: Int = imap.numMessages.intValue
    print("Num messages = \(totalNum)")

    // To determine the number of unseen messages, a call
    // to Search is required, which returns the set of UIDs
    // of all unseen messages.

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

    var messageSet: CkoMessageSet? = imap.search("UNSEEN", bUid: fetchUids)
    if imap.lastMethodSuccess == false {
        print("\(imap.lastErrorText!)")
        return
    }

    var numUnseen: UInt32 = messageSet!.count.intValue
    print("\(numUnseen)")

    print("UIDs ----")

    // Display the UIDs
    var i: Int = 0
    while i < messageSet!.count.intValue {
        print("\(messageSet!.getId(i))")
        i = i + 1
    }

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

    messageSet = nil

}