Unicode C++

List and Inspect IMAP Mailboxes

Demonstrates the Chilkat Mailboxes class, a read-only result collection populated by Imap.MbxList. This example connects to an IMAP server, lists all mailboxes into a Mailboxes object, then loops from 0 to Count - 1 and inspects each mailbox: its name (GetName), whether it is selectable (IsSelectable) or marked (IsMarked), whether it may have child mailboxes (HasInferiors), a specific flag (HasFlag), and all of its flags both as a string (GetFlags) and individually (GetNumFlags with GetNthFlag). Finally it looks up a mailbox by name with GetMailboxIndex.

Background: Mailboxes is how an application renders an IMAP folder tree. Because it is read-only, you never construct it directly — you receive it from MbxList and read its entries by index. Mailbox names come back as normal Unicode text (Chilkat handles the modified UTF-7 / IMAP UTF-8 encoding at the protocol level), so a name from GetName can be passed straight to methods like SelectMailbox. Note that HasInferiors is often true: it means children exist or may be created, which is not the same as \HasChildren.

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#include <CkImapW.h>
#include <CkMailboxesW.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates using Chilkat.Imap to populate a Mailboxes object (via MbxList), then looping
    //  over the collection to inspect each mailbox's name and attributes.  Mailboxes is a read-only
    //  result collection -- applications inspect the entries but do not add, remove, or modify them.

    CkImapW imap;

    imap.put_Ssl(true);
    imap.put_Port(993);

    success = imap.Connect(L"imap.example.com");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    success = imap.Login(L"user@example.com",L"myPassword");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    //  Populate a Mailboxes object with the full list of mailboxes.  The first argument requests
    //  all mailboxes (not subscribed-only) and "*" matches any name.
    bool subscribedOnly = false;
    CkMailboxesW mailboxes;
    success = imap.MbxList(subscribedOnly,L"",L"*",mailboxes);
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    //  Loop over each mailbox in the returned collection.
    int n = mailboxes.get_Count();
    wprintf(L"Number of mailboxes: %d\n",n);

    int i;
    for (i = 0; i <= n - 1; i++) {
        const wchar_t *name = mailboxes.getName(i);
        wprintf(L"Mailbox: %s\n",name);

        //  Whether the mailbox can be selected or examined for message access.
        if (mailboxes.IsSelectable(i)) {
            wprintf(L"  Selectable: yes\n");
        }
        else {
            wprintf(L"  Selectable: no\n");
        }

        //  Whether the server marked the mailbox as possibly having new messages.
        if (mailboxes.IsMarked(i)) {
            wprintf(L"  Marked: yes\n");
        }

        //  Whether the mailbox has, or may contain, child mailboxes.
        if (mailboxes.HasInferiors(i)) {
            wprintf(L"  May have child mailboxes\n");
        }

        //  Check for a specific flag by name.  Include the leading backslash for a system flag;
        //  in CkScript a literal backslash in a string is written as "\\".
        if (mailboxes.HasFlag(i,L"\\HasChildren")) {
            wprintf(L"  Has child mailboxes\n");
        }

        //  Get all of the mailbox's flags as a comma-separated string.
        const wchar_t *flags = mailboxes.getFlags(i);
        wprintf(L"  Flags: %s\n",flags);

        //  Iterate the flags individually.
        int numFlags = mailboxes.GetNumFlags(i);
        int j;
        for (j = 0; j <= numFlags - 1; j++) {
            const wchar_t *flag = mailboxes.getNthFlag(i,j);
            wprintf(L"    Flag %d: %s\n",j,flag);
        }

    }

    //  Look up a mailbox by name.  Returns -1 if no mailbox with that name is present.
    int sentIndex = mailboxes.GetMailboxIndex(L"Sent");
    if (sentIndex >= 0) {
        wprintf(L"The Sent mailbox is at index %d\n",sentIndex);
    }

    success = imap.Disconnect();
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }
    }