Determine the Number of Unseen Email Messages

Demonstrates how to determine how many unseen messages exist in an email account on an IMAP server.

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

void ChilkatSample(void)
    {
    CkImap imap;

    bool success;

    //  Anything unlocks the component and begins a fully-functional 30-day trial.
    success = imap.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        printf("%s\n",imap.lastErrorText());
        return;
    }

    //  Connect to an IMAP server.
    success = imap.Connect("mail.chilkatsoft.com");
    if (success != true) {
        printf("%s\n",imap.lastErrorText());
        return;
    }

    //  Login
    success = imap.Login("***","***");
    if (success != true) {
        printf("%s\n",imap.lastErrorText());
        return;
    }

    //  Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success != true) {
        printf("%s\n",imap.lastErrorText());
        return;
    }

    //  After selecting the mailbox. the total number of emails
    //  is immediately available:
    int totalNum;
    totalNum = imap.get_NumMessages();
    printf("%d\n",totalNum);

    //  To determine the number of unseen messages, a call
    //  to Search is required, which returns the set of UIDs
    //  of all unseen messages.
    CkMessageSet *messageSet = 0;
    //  We can choose to fetch UIDs or sequence numbers.
    bool fetchUids;
    fetchUids = true;

    messageSet = imap.Search("UNSEEN",fetchUids);
    if (messageSet == 0 ) {
        printf("%s\n",imap.lastErrorText());
        return;
    }

    int numUnseen;
    numUnseen = messageSet->get_Count();
    printf("%d\n",numUnseen);

    printf("UIDs ----\n");

    //  Display the UIDs
    int i;
    int msgId;
    for (i = 0; i <= messageSet->get_Count() - 1; i++) {
        msgId = messageSet->GetId(i);
        printf("%d\n",msgId);
    }

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

    delete messageSet;

    }