Fetch a Range of POP3 Messages

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Demonstrates the Chilkat MailMan.FetchRange method, which retrieves a range of messages from the POP3 mailbox and appends them to an EmailBundle. The arguments are keepOnServer, headersOnly, numBodyLines, a zero-based inclusive startIndex and endIndex, and the EmailBundle. This example fetches the first five messages.

func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the MailMan.FetchRange method, which retrieves a range of messages from the
    //  POP3 mailbox and appends them to an EmailBundle.  The arguments are keepOnServer,
    //  headersOnly, numBodyLines, startIndex, endIndex, and the EmailBundle.  The indexes are
    //  zero-based and inclusive.

    let mailman = CkoMailMan()!

    //  Configure the POP3 server connection.
    mailman.mailHost = "pop.example.com"
    mailman.mailPort = 995
    mailman.popSsl = true
    mailman.popUsername = "user@example.com"
    mailman.popPassword = "myPassword"

    //  Fetch the first 5 messages (indexes 0 through 4), full bodies, leaving them on the server.
    //  keepOnServer=true, headersOnly=false (fetch the entire message).
    //  Note: numBodyLines only applies when headersOnly is true (it sets how many lines of the
    //  body to include along with the headers).  When headersOnly is false, the entire message
    //  is fetched and numBodyLines is ignored.
    let bundle = CkoEmailBundle()!

    success = mailman.fetchRange(keepOnServer: true, headersOnly: false, numBodyLines: 0, startIndex: 0, endIndex: 4, bundle: bundle)
    if success == false {
        print("\(mailman.lastErrorText!)")
        return
    }

    var n: Int = bundle.messageCount.intValue
    print("Fetched \(n) messages.")

    let email = CkoEmail()!
    var i: Int
    for i = 0; i <= n - 1; i++ {
        success = bundle.email(at: i, email: email)
        print("\(email.subject!)")
    }

    //  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
    //  connects and authenticates -- using the property settings above -- whenever a server
    //  operation requires it.  Calling the explicit connect/authenticate methods can still be
    //  helpful to determine whether a failure occurs while connecting or while authenticating.

}