(C++) Get IMAP UID from Email Header

Demonstrates how to get the IMAP UID from an email header. After fetching an email or header using IMAP, the UID is contained in the ckx-imap-uid header field.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkImap.h>
#include <CkMessageSet.h>
#include <CkEmailBundle.h>
#include <CkEmail.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkImap imap;

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    success = imap.Connect("imap.someMailServer.com");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // Login
    success = imap.Login("login","password");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    bool fetchUids = true;
    // Get the message UIDs of all the emails in the mailbox

    CkMessageSet messageSet;
    success = imap.QueryMbx("ALL",fetchUids,messageSet);
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    CkEmailBundle bundle;
    bool headersOnly = true;
    success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // The UID of each fetched email header is available 
    // in the ckx-imap-uid header field.
    CkEmail email;
    CkMessageSet msgSet1;
    int i = 0;
    int szBundle = bundle.get_MessageCount();
    while (i < szBundle) {
        bundle.EmailAt(i,email);

        // Build a message set containing one UID
        const char *uidStr = email.getHeaderField("ckx-imap-uid");
        msgSet1.FromCompactString(uidStr);

        // Move this message to some other folder.
        success = imap.MoveMessages(msgSet1,"someOtherFolder");
        if (success != true) {
            std::cout << imap.lastErrorText() << "\r\n";
            // Exit the loop...
            i = szBundle;
        }

        i = i + 1;
    }

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