static function calendar($params = false, $nodeID = 0)
 {
     if (!is_numeric($nodeID) and !is_array($nodeID)) {
         return array();
     }
     if ($params === false) {
         $params = array('Depth' => false, 'Offset' => false, 'Limit' => false, 'AttributeFilter' => false, 'ExtendedAttributeFilter' => false, 'ClassFilterType' => false, 'ClassFilterArray' => false, 'GroupBy' => false);
     }
     $offset = isset($params['Offset']) && is_numeric($params['Offset']) ? $params['Offset'] : false;
     $limit = isset($params['Limit']) && is_numeric($params['Limit']) ? $params['Limit'] : false;
     $depth = isset($params['Depth']) && is_numeric($params['Depth']) ? $params['Depth'] : false;
     $depthOperator = isset($params['DepthOperator']) ? $params['DepthOperator'] : false;
     $groupBy = isset($params['GroupBy']) ? $params['GroupBy'] : false;
     $mainNodeOnly = isset($params['MainNodeOnly']) ? $params['MainNodeOnly'] : false;
     $ignoreVisibility = isset($params['IgnoreVisibility']) ? $params['IgnoreVisibility'] : false;
     if (!isset($params['ClassFilterType'])) {
         $params['ClassFilterType'] = false;
     }
     $classCondition = eZContentObjectTreeNode::createClassFilteringSQLString($params['ClassFilterType'], $params['ClassFilterArray']);
     $attributeFilter = eZContentObjectTreeNode::createAttributeFilterSQLStrings($params['AttributeFilter'], $sortingInfo);
     $extendedAttributeFilter = eZContentObjectTreeNode::createExtendedAttributeFilterSQLStrings($params['ExtendedAttributeFilter']);
     $mainNodeOnlyCond = eZContentObjectTreeNode::createMainNodeConditionSQLString($mainNodeOnly);
     $pathStringCond = '';
     $notEqParentString = '';
     eZContentObjectTreeNode::createPathConditionAndNotEqParentSQLStrings($pathStringCond, $notEqParentString, $nodeID, $depth, $depthOperator);
     $groupBySelectText = '';
     $groupBySQL = $extendedAttributeFilter['group_by'];
     if (!$groupBySQL) {
         eZContentObjectTreeNode::createGroupBySQLStrings($groupBySelectText, $groupBySQL, $groupBy);
     } else {
         if ($groupBy) {
             eZDebug::writeError("Cannot use group_by parameter together with extended attribute filter which sets group_by!", __METHOD__);
         }
     }
     $limitation = isset($params['Limitation']) && is_array($params['Limitation']) ? $params['Limitation'] : false;
     $limitationList = eZContentObjectTreeNode::getLimitationList($limitation);
     $sqlPermissionChecking = eZContentObjectTreeNode::createPermissionCheckingSQL($limitationList);
     // Determine whether we should show invisible nodes.
     $showInvisibleNodesCond = eZContentObjectTreeNode::createShowInvisibleSQLString(!$ignoreVisibility);
     $query = "SELECT DISTINCT\n                         ezcontentobject.published as published\n                         {$groupBySelectText}\n                   FROM\n                      ezcontentobject_tree\n                      INNER JOIN ezcontentobject ON (ezcontentobject.id = ezcontentobject_tree.contentobject_id)\n                      INNER JOIN ezcontentclass ON (ezcontentclass.id = ezcontentobject.contentclass_id)\n                      INNER JOIN ezcontentobject_name ON (\n                          ezcontentobject_name.contentobject_id = ezcontentobject_tree.contentobject_id AND\n                          ezcontentobject_name.content_version = ezcontentobject_tree.contentobject_version\n                      )\n\n                      {$attributeFilter['from']}\n                      {$extendedAttributeFilter['tables']}\n                      {$sqlPermissionChecking['from']}\n                   WHERE\n                      {$pathStringCond}\n                      {$extendedAttributeFilter['joins']}\n                      {$attributeFilter['where']}\n                      ezcontentclass.version = 0 AND\n                      {$notEqParentString}\n                      {$mainNodeOnlyCond}\n                      {$classCondition}\n                      " . eZContentLanguage::sqlFilter('ezcontentobject_name', 'ezcontentobject') . "\n                      {$showInvisibleNodesCond}\n                      {$sqlPermissionChecking['where']}\n                {$groupBySQL}";
     $db = eZDB::instance();
     $server = count($sqlPermissionChecking['temp_tables']) > 0 ? eZDBInterface::SERVER_SLAVE : false;
     if (!$offset && !$limit) {
         $nodeListArray = $db->arrayQuery($query, array(), $server);
     } else {
         $nodeListArray = $db->arrayQuery($query, array('offset' => $offset, 'limit' => $limit), $server);
     }
     // cleanup temp tables
     $db->dropTempTableList($sqlPermissionChecking['temp_tables']);
     return $nodeListArray;
 }
    static function calendar( $params = false, $nodeID = 0 )
    {
        if ( !is_numeric( $nodeID ) and !is_array( $nodeID ) )
        {
            return array();
        }

        if ( $params === false )
        {
            $params = array( 'Depth'                    => false,
                             'Offset'                   => false,
                             'Limit'                    => false,
                             'AttributeFilter'          => false,
                             'ExtendedAttributeFilter'  => false,
                             'ClassFilterType'          => false,
                             'ClassFilterArray'         => false,
                             'GroupBy'                  => false );
        }

        $offset           = ( isset( $params['Offset'] ) && is_numeric( $params['Offset'] ) ) ? $params['Offset']             : false;
        $limit            = ( isset( $params['Limit']  ) && is_numeric( $params['Limit']  ) ) ? $params['Limit']              : false;
        $depth            = ( isset( $params['Depth']  ) && is_numeric( $params['Depth']  ) ) ? $params['Depth']              : false;
        $depthOperator    = ( isset( $params['DepthOperator']     ) )                         ? $params['DepthOperator']      : false;
        $groupBy          = ( isset( $params['GroupBy']           ) )                         ? $params['GroupBy']            : false;
        $mainNodeOnly     = ( isset( $params['MainNodeOnly']      ) )                         ? $params['MainNodeOnly']       : false;
        $ignoreVisibility = ( isset( $params['IgnoreVisibility']  ) )                         ? $params['IgnoreVisibility']   : false;
        if ( !isset( $params['ClassFilterType'] ) )
            $params['ClassFilterType'] = false;

        $classCondition          = eZContentObjectTreeNode::createClassFilteringSQLString( $params['ClassFilterType'], $params['ClassFilterArray'] );
        $attributeFilter         = eZContentObjectTreeNode::createAttributeFilterSQLStrings( $params['AttributeFilter'], $sortingInfo );
        $extendedAttributeFilter = eZContentObjectTreeNode::createExtendedAttributeFilterSQLStrings( $params['ExtendedAttributeFilter'] );
        $mainNodeOnlyCond        = eZContentObjectTreeNode::createMainNodeConditionSQLString( $mainNodeOnly );

        $pathStringCond     = '';
        $notEqParentString  = '';
        eZContentObjectTreeNode::createPathConditionAndNotEqParentSQLStrings( $pathStringCond, $notEqParentString, $nodeID, $depth, $depthOperator );

        $groupBySelectText  = '';
        $groupBySQL         = $extendedAttributeFilter['group_by'];
        if ( !$groupBySQL )
        {
            eZContentObjectTreeNode::createGroupBySQLStrings( $groupBySelectText, $groupBySQL, $groupBy );
        }
        else if ( $groupBy )
        {
            eZDebug::writeError( "Cannot use group_by parameter together with extended attribute filter which sets group_by!", __METHOD__ );
        }

        $useVersionName     = true;
        $versionNameTables  = eZContentObjectTreeNode::createVersionNameTablesSQLString( $useVersionName );
        $versionNameJoins   = eZContentObjectTreeNode::createVersionNameJoinsSQLString( $useVersionName, false );

        $limitation = ( isset( $params['Limitation']  ) && is_array( $params['Limitation']  ) ) ? $params['Limitation']: false;
        $limitationList = eZContentObjectTreeNode::getLimitationList( $limitation );
        $sqlPermissionChecking = eZContentObjectTreeNode::createPermissionCheckingSQL( $limitationList );

        // Determine whether we should show invisible nodes.
        $showInvisibleNodesCond = eZContentObjectTreeNode::createShowInvisibleSQLString( !$ignoreVisibility );

        $query = "SELECT DISTINCT
                         ezcontentobject.published as published
                         $groupBySelectText
                   FROM
                      ezcontentobject_tree,
                      ezcontentobject,ezcontentclass
                      $versionNameTables
                      $attributeFilter[from]
                      $extendedAttributeFilter[tables]
                      $sqlPermissionChecking[from]
                   WHERE
                      $pathStringCond
                      $extendedAttributeFilter[joins]
                      $attributeFilter[where]
                      ezcontentclass.version=0
                      AND
                      $notEqParentString
                      $mainNodeOnlyCond
                      ezcontentobject_tree.contentobject_id = ezcontentobject.id AND
                      ezcontentclass.id = ezcontentobject.contentclass_id AND
                      $classCondition
                      $versionNameJoins
                      $showInvisibleNodesCond
                      $sqlPermissionChecking[where]
                $groupBySQL";


        $db = eZDB::instance();

        $server = count( $sqlPermissionChecking['temp_tables'] ) > 0 ? eZDBInterface::SERVER_SLAVE : false;

        if ( !$offset && !$limit )
        {
            $nodeListArray = $db->arrayQuery( $query, array(), $server );
        }
        else
        {
            $nodeListArray = $db->arrayQuery( $query, array( 'offset' => $offset,
                                                              'limit'  => $limit ),
                                                      $server );
        }

        // cleanup temp tables
        $db->dropTempTableList( $sqlPermissionChecking['temp_tables'] );

        return $nodeListArray;
    }