(Unicode C++) Copy Email from one IMAP Account to Another

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

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#include <CkImapW.h>
#include <CkMessageSetW.h>
#include <CkFileAccessW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    CkImapW imapSrc;

    // This example assumes Chilkat Imap to have been previously unlocked.
    // See Unlock Imap for sample code.

    // Connect to our source IMAP server.
    imapSrc.put_Ssl(true);
    imapSrc.put_Port(993);
    bool success = imapSrc.Connect(L"MY-IMAP-DOMAIN");
    if (success != true) {
        wprintf(L"%s\n",imapSrc.lastErrorText());
        return;
    }

    // Login to the source IMAP server
    success = imapSrc.Login(L"MY-IMAP-LOGIN",L"MY-IMAP-PASSWORD");
    if (success != true) {
        wprintf(L"%s\n",imapSrc.lastErrorText());
        return;
    }

    CkImapW imapDest;

    // Connect to our destination IMAP server.
    imapDest.put_Ssl(true);
    imapDest.put_Port(993);
    success = imapDest.Connect(L"MY-IMAP-DOMAIN2");
    if (success != true) {
        wprintf(L"%s\n",imapDest.lastErrorText());
        return;
    }

    // Login to the destination IMAP server
    success = imapDest.Login(L"MY-IMAP-LOGIN2",L"MY-IMAP-PASSWORD2");
    if (success != true) {
        wprintf(L"%s\n",imapDest.lastErrorText());
        return;
    }

    // Select a source IMAP mailbox on the source IMAP server
    success = imapSrc.SelectMailbox(L"Inbox");
    if (success != true) {
        wprintf(L"%s\n",imapSrc.lastErrorText());
        return;
    }

    bool fetchUids = true;

    // Get the set of UIDs for all emails on the source server.
    CkMessageSetW *mset = imapSrc.Search(L"ALL",fetchUids);
    if (imapSrc.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",imapSrc.lastErrorText());
        return;
    }

    // Load the complete set of UIDs that were previously copied.
    // We dont' want to copy any of these to the destination.
    CkFileAccessW fac;
    CkMessageSetW msetAlreadyCopied;
    const wchar_t *strMsgSet = fac.readEntireTextFile(L"qa_cache/saAlreadyLoaded.txt",L"utf-8");
    if (fac.get_LastMethodSuccess() == true) {
        msetAlreadyCopied.FromCompactString(strMsgSet);
    }

    int numUids = mset->get_Count();
    CkStringBuilderW sbFlags;

    int i = 0;
    while (i < numUids) {

        // If this UID was not already copied...
        int uid = mset->GetId(i);
        if (!msetAlreadyCopied.ContainsId(uid)) {

            wprintf(L"copying %d...\n",uid);

            // Get the flags.
            const wchar_t *flags = imapSrc.fetchFlags(uid,true);
            if (imapSrc.get_LastMethodSuccess() == false) {
                wprintf(L"%s\n",imapSrc.lastErrorText());
                return;
            }

            sbFlags.SetString(flags);

            // Get the MIME of this email from the source.
            const wchar_t *mimeStr = imapSrc.fetchSingleAsMime(uid,true);
            if (imapSrc.get_LastMethodSuccess() == false) {
                wprintf(L"%s\n",imapSrc.lastErrorText());
                return;
            }

            bool seen = sbFlags.Contains(L"\\Seen",false);
            bool flagged = sbFlags.Contains(L"\\Flagged",false);
            bool answered = sbFlags.Contains(L"\\Answered",false);
            bool draft = sbFlags.Contains(L"\\Draft",false);

            success = imapDest.AppendMimeWithFlags(L"Inbox",mimeStr,seen,flagged,answered,draft);
            if (success != true) {
                wprintf(L"%s\n",imapDest.lastErrorText());
                return;
            }

            // Update msetAlreadyCopied with the uid just copied.
            msetAlreadyCopied.InsertId(uid);

            // Save at every iteration just in case there's a failure..
            strMsgSet = msetAlreadyCopied.toCompactString();
            fac.WriteEntireTextFile(L"qa_cache/saAlreadyLoaded.txt",strMsgSet,L"utf-8",false);
        }

        i = i + 1;
    }

    delete mset;

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