Swift

Copy Email from one IMAP Account to Another

See more IMAP Examples

Demonstrates how to copy the email in a mailbox from one account to another. Swift

func chilkatTest() {
    var success: Bool = false

    let imapSrc = CkoImap()!

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

    // Connect to our source IMAP server.
    imapSrc.ssl = true
    imapSrc.port = 993
    success = imapSrc.connect(hostname: "MY-IMAP-DOMAIN")
    if success != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    // Login to the source IMAP server
    success = imapSrc.login(login: "MY-IMAP-LOGIN", password: "MY-IMAP-PASSWORD")
    if success != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    let imapDest = CkoImap()!

    // Connect to our destination IMAP server.
    imapDest.ssl = true
    imapDest.port = 993
    success = imapDest.connect(hostname: "MY-IMAP-DOMAIN2")
    if success != true {
        print("\(imapDest.lastErrorText!)")
        return
    }

    // Login to the destination IMAP server
    success = imapDest.login(login: "MY-IMAP-LOGIN2", password: "MY-IMAP-PASSWORD2")
    if success != true {
        print("\(imapDest.lastErrorText!)")
        return
    }

    // Select a source IMAP mailbox on the source IMAP server
    success = imapSrc.selectMailbox(mailbox: "Inbox")
    if success != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    var fetchUids: Bool = true

    // Get the set of UIDs for all emails on the source server.
    var mset: CkoMessageSet? = imapSrc.search(criteria: "ALL", bUid: fetchUids)
    if imapSrc.lastMethodSuccess != true {
        print("\(imapSrc.lastErrorText!)")
        return
    }

    // Load the complete set of UIDs that were previously copied.
    // We dont' want to copy any of these to the destination.
    let fac = CkoFileAccess()!
    let msetAlreadyCopied = CkoMessageSet()!
    var strMsgSet: String? = fac.readEntireTextFile(path: "qa_cache/saAlreadyLoaded.txt", charset: "utf-8")
    if fac.lastMethodSuccess == true {
        msetAlreadyCopied.fromCompactString(str: strMsgSet)
    }

    var numUids: Int = mset!.count.intValue
    let sbFlags = CkoStringBuilder()!

    var i: Int = 0
    while i < numUids {

        // If this UID was not already copied...
        var uid: Int = mset!.getId(index: i)
        if !msetAlreadyCopied.containsId(id: uid) {

            print("copying \(uid)...")

            // Get the flags.
            var flags: String? = imapSrc.fetchFlags(msgId: uid, bUid: true)
            if imapSrc.lastMethodSuccess == false {
                print("\(imapSrc.lastErrorText!)")
                return
            }

            sbFlags.setString(value: flags)

            // Get the MIME of this email from the source.
            var mimeStr: String? = imapSrc.fetchSingle(asMime: uid, bUid: true)
            if imapSrc.lastMethodSuccess == false {
                print("\(imapSrc.lastErrorText!)")
                return
            }

            var seen: Bool = sbFlags.contains(str: "\\Seen", caseSensitive: false)
            var flagged: Bool = sbFlags.contains(str: "\\Flagged", caseSensitive: false)
            var answered: Bool = sbFlags.contains(str: "\\Answered", caseSensitive: false)
            var draft: Bool = sbFlags.contains(str: "\\Draft", caseSensitive: false)

            success = imapDest.appendMime(withFlags: "Inbox", mimeText: mimeStr, seen: seen, flagged: flagged, answered: answered, draft: draft)
            if success != true {
                print("\(imapDest.lastErrorText!)")
                return
            }

            // Update msetAlreadyCopied with the uid just copied.
            msetAlreadyCopied.insertId(id: uid)

            // Save at every iteration just in case there's a failure..
            strMsgSet = msetAlreadyCopied.toCompactString()
            fac.writeEntireTextFile(path: "qa_cache/saAlreadyLoaded.txt", fileData: strMsgSet, charset: "utf-8", includePreamble: false)
        }

        i = i + 1
    }

    mset = nil

    // Disconnect from the IMAP servers.
    success = imapSrc.disconnect()
    success = imapDest.disconnect()

}