(C) Process Large POP3 Mailbox

Demonstrates how to read email from a mailbox that may contain a large number of emails.

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#include <C_CkMailMan.h>
#include <C_CkStringArray.h>
#include <C_CkEmailBundle.h>

void ChilkatSample(void)
    {
    HCkMailMan mailman;
    HCkStringArray sa;
    int i;
    int numEmails;
    int chunkSize;
    int chunkBeginIdx;
    int chunkEndIdx;
    HCkStringArray saChunk;
    const char *chunkStr;
    HCkEmailBundle bundle;

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

    mailman = CkMailMan_Create();

    CkMailMan_putMailHost(mailman,"pop.example.com");

    CkMailMan_putPopUsername(mailman,"myLogin");
    CkMailMan_putPopPassword(mailman,"myPassword");

    CkMailMan_putMailPort(mailman,995);
    CkMailMan_putPopSsl(mailman,TRUE);

    // Get the list of UIDLs for all emails in the mailbox.
    sa = CkMailMan_GetUidls(mailman);
    if (CkMailMan_getLastMethodSuccess(mailman) == FALSE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkMailMan_Dispose(mailman);
        return;
    }

    numEmails = CkStringArray_getCount(sa);
    if (numEmails == 0) {
        printf("Mailbox is empty\n");
        CkMailMan_Dispose(mailman);
        return;
    }

    chunkSize = 6;

    // Download the emails in chunks of 6 emails each.
    chunkBeginIdx = 0;
    chunkEndIdx = chunkSize - 1;
    if (chunkEndIdx >= numEmails) {
        chunkEndIdx = numEmails - 1;
    }

    saChunk = CkStringArray_Create();
    while ((chunkBeginIdx < numEmails)) {

        printf("%d to %d\n",chunkBeginIdx,chunkEndIdx);

        // Build a chunk of UIDLs.
        CkStringArray_Clear(saChunk);
        for (i = chunkBeginIdx; i <= chunkEndIdx; i++) {
            CkStringArray_Append(saChunk,CkStringArray_getString(sa,i));
        }

        // Log the UIDLs in this chunk...
        chunkStr = CkStringArray_saveToText(saChunk);
        printf("%s\n",chunkStr);

        // Download this chunk of email from the POP3 server.
        bundle = CkMailMan_FetchMultiple(mailman,saChunk);
        if (CkMailMan_getLastMethodSuccess(mailman) == FALSE) {
            printf("%s\n",CkMailMan_lastErrorText(mailman));
            CkMailMan_Dispose(mailman);
            CkStringArray_Dispose(saChunk);
            return;
        }

        printf("Downloaded %d emails.\n",CkEmailBundle_getMessageCount(bundle));
        printf("----\n");

        // Process the bundle...
        // (your application's processing code goes here...)

        CkEmailBundle_Dispose(bundle);

        // Get the next chunk...
        chunkBeginIdx = chunkBeginIdx + chunkSize;
        chunkEndIdx = chunkEndIdx + chunkSize;
        if (chunkEndIdx >= numEmails) {
            chunkEndIdx = numEmails - 1;
        }

    }

    CkStringArray_Dispose(sa);


    CkMailMan_Dispose(mailman);
    CkStringArray_Dispose(saChunk);

    }