WebResourceProvider

//  CodeProjectTopPostersProvider.cpp
//
//  An object that retrieves the top CodeProject forum posters.
//

#include "stdafx.h"
#include "CodeProjectTopPostersProvider.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction

CodeProjectTopPostersProvider::CodeProjectTopPostersProvider
  (CStringArray&  topPosters,
   long           nTop)
  : CWebResourceProvider()
{
  m_pTopPosters = &topPosters;
  m_pTopPosters->RemoveAll();
  m_nTop = nTop;
  m_nPage = 1;

  // Don't allow user to get more than top 100 posters
  if (m_nTop > 100) {
      m_nTop = 100;
  }
}

CodeProjectTopPostersProvider::~CodeProjectTopPostersProvider()
{
}

/////////////////////////////////////////////////////////////////////////////
// Overridden methods

void CodeProjectTopPostersProvider::constructUrl
  (CString& strUrl)
{
  // Construct the CodeProject URL to be retrieved
  strUrl.Format ("http://www.codeproject.com/script/profile/whos_who.asp?VT=mess&PN=%d", m_nPage);
}

bool CodeProjectTopPostersProvider::moreAvailable()
{
  if ((m_nPage * 10) < m_nTop) {
    ::Sleep (500);  // insert delay so we don't overload www.codeproject.com
    m_nPage++;
    return (true);
  }
  return (false);
}

void CodeProjectTopPostersProvider::parseContent()
{
  // Reset the object
  m_dwFetchStatus = 1;
  m_strFetchError = "Error parsing content";

  // Get posters on this page
  do {
    // Get poster's name
    CString strName;
    if (!skipTo ("<h4>"))
       break;
    if (!skipTo (". "))
       break;
    if (!extractTo ("</h4>", strName))
       break;
    trim (strName);
    removeHtml (strName);

    // Get post count
    CString strCount;
    if (!skipTo ("(while logged in)"))
       break;
    if (!skipTo ("class=smalltext>"))
       break;
    if (!extractTo ("</td>", strCount))
       break;

    // Add poster to list
    CString strPoster;
    strPoster.Format ("[%s]      %s", strCount, strName);
    ASSERT (m_pTopPosters != NULL);
    m_pTopPosters->Add (strPoster);
  }
  while (m_pTopPosters->GetSize() < m_nTop);

  // Return successfully
  m_dwFetchStatus = 0;
  m_strFetchError.Empty();
}

// End CodeProjectTopPostersProvider.cpp