classes/core/Handler.inc.php

<?php

// $Id: Handler.inc.php,v 1.22 2008/07/01 01:16:09 asmecher Exp $


class Handler {

   function index() {
      header('HTTP/1.0 404 Not Found');
      fatalError('404 Not Found');
   }

   function validate($requiresJournal = false) {
      if (Config::getVar('security', 'force_ssl') && Request::getProtocol() != 'https') {
         // Force SSL connections site-wide
         Request::redirectSSL();
      }

      $journal = Request::getJournal();

      if ($requiresJournal && $journal == null) {
         // Requested page is only allowed for journals
         Request::redirect(null, 'about');
      }

      $page = Request::getRequestedPage();
      if (  $journal != null &&
         !Validation::isLoggedIn() &&
         !in_array($page, Handler::getLoginExemptions()) &&
         $journal->getSetting('restrictSiteAccess')
      ) {
         Request::redirect(null, 'login');
      }
   }

   function getLoginExemptions() {
      return array('user', 'login', 'help');
   }

   function hashPageContext($contextData = array()) {
      return md5(
         Request::getRequestedJournalPath() . ',' .
         Request::getRequestedPage() . ',' .
         Request::getRequestedOp() . ',' .
         serialize($contextData)
      );
   }

   function &getRangeInfo($rangeName, $contextData = null) {
      $journal =& Request::getJournal();
      $journalSettingsDao =& DAORegistry::getDAO('JournalSettingsDAO');

      $pageNum = Request::getUserVar($rangeName . 'Page');
      if (empty($pageNum)) {
         $session =& Request::getSession();
         $pageNum = 1; // Default to page 1
         if ($session && $contextData !== null) {
            // See if we can get a page number from a prior request
            $context = Handler::hashPageContext($contextData);

            if (Request::getUserVar('clearPageContext')) {
               // Explicitly clear the old page context
               $session->unsetSessionVar("page-$context");
            } else {
               $oldPage = $session->getSessionVar("page-$context");
               if (is_numeric($oldPage)) $pageNum = $oldPage;
            }
         }
      } else {
         $session =& Request::getSession();
         if ($session && $contextData !== null) {
            // Store the page number
            $context = Handler::hashPageContext($contextData);
            $session->setSessionVar("page-$context", $pageNum);
         }
      }

      if ($journal) $count = $journalSettingsDao->getSetting($journal->getJournalId(), 'itemsPerPage');
      if (!isset($count)) $count = Config::getVar('interface', 'items_per_page');

      import('db.DBResultRange');

      if (isset($count)) $returner = &new DBResultRange($count, $pageNum);
      else $returner = &new DBResultRange(-1, -1);

      return $returner;
   }
}

?>

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