Scan for Emails with Attachments and Save Attachments to Files

var success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

var imap = new CkImap();

// Connect to an IMAP server.
// Use TLS
imap.Ssl = true;
imap.Port = 993;
success = imap.Connect("imap.example.com");
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Login
success = imap.Login("myLogin","myPassword");
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Select an IMAP mailbox
success = imap.SelectMailbox("Inbox");
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

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

// Get the message IDs of all the emails in the mailbox
var messageSet = new CkMessageSet();
success = imap.QueryMbx("ALL",fetchUids,messageSet);
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Fetch the email headers into a bundle object:
var bundle = new CkEmailBundle();
var headersOnly = true;
success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
if (success == false) {
    console.log(imap.LastErrorText);
    return;
}

// Scan for emails with attachments, and save the attachments
// to a sub-directory.
var fullEmail = new CkEmail();
var emailHeader = new CkEmail();
var i = 0;
while (i < bundle.MessageCount) {
    // The bundle contains email headers..
    bundle.EmailAt(i,emailHeader);

    // Does this email have attachments?
    // Use GetMailNumAttach because the attachments
    // are not actually in the email object because
    // we only downloaded headers.
    var numAttach = imap.GetMailNumAttach(emailHeader);

    if (numAttach > 0) {
        // Download the entire email and save the
        // attachments. (Remember, we 
        // need to download the entire email because
        // only the headers were previously downloaded.

        // 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 = emailHeader.GetHeaderField("ckx-imap-uid");
        var uid = uidStr;

        success = imap.FetchEmail(false,uid,true,fullEmail);
        if (success == false) {
            console.log(imap.LastErrorText);
            return;
        }

        success = fullEmail.SaveAllAttachments("attachmentsDir");

        var j;
        for (j = 0; j <= numAttach - 1; j++) {
            var filename = imap.GetMailAttachFilename(emailHeader,j);
            console.log(filename);
        }

    }

    i = i+1;
}

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