<?php
/** 
*   @file getGranulesSize.php
*   @brief
*   @version $Id:  $ 
*/

       if (!$_GET['id']) exit('INPUT ERROR');
       require_once './DDserverWeb_ini.php';

       $alias = array(baseDir => webAlias);
       $replace = array("-" => "_");

      $dataSet = strtr($_GET['id'], $replace); 
 
       if (file_exists("GRANULES/$dataSet.json")) {
           echo file_get_contents("GRANULES/$dataSet.json");
           exit();
       }
       $ddSys = new DOMDocument('1.0');
       $ddSys->load(baseDir."/DDsys.xml");
       $xp = new DOMXpath($ddSys);

       $VI = $xp->query("//NAME[.='".$dataSet."']"); 
       if ( $VI->item(0)->nodeValue == NULL ) exit('NO SUCH DATASET');
     
       $main = array();
       $index = array();  

        $location = $VI->item(0)->parentNode->getElementsByTagName("LOCATION")->item(0)->nodeValue;
        
        if (file_exists($location."RestrictedAccess")) exit(); // PrivateAccess 
        
        foreach (glob($location."*.nc.gz") as $granule) {                  
            $cmd = 'stat --printf="%s" '. $granule; 
            $file = basename($granule,".nc.gz");            
            $index[$file] = exec($cmd);
        }
        $main[substr($location,strlen(baseDir))] = $index;
        
        $json =  json_encode($main);        
        file_put_contents("GRANULES/$dataSet.json", $json);       
        exit($json);
?>