/**
  *	post metadata, mint a new DOI
  *
  */
 public function actionMint()
 {
     $result['status'] = false;
     $status_array = array('Submitted', 'UserStartedIncomplete', 'Curation');

     $mds_metadata_url="https://mds.datacite.org/metadata";
     $mds_doi_url="https://mds.datacite.org/doi";

     $mds_username = Yii::app()->params['mds_username'];
     $mds_password = Yii::app()->params['mds_password'];
     $mds_prefix = Yii::app()->params['mds_prefix'];

     if (isset($_POST['doi'])) {
         $doi = $_POST['doi'];
         if (stristr($doi, "/")) {
             $temp = explode("/", $doi);
             $doi = $temp[1];
         }

         $doi = trim($doi);
         $dataset = Dataset::model()->find("identifier=?", array($doi));

         if ($dataset && ! in_array($dataset->upload_status, $status_array)) {
             $xml_data = $dataset->toXML();
             $ch= curl_init();
             curl_setopt($ch, CURLOPT_URL, $mds_metadata_url);
             curl_setopt($ch, CURLOPT_POST, 1);
             curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
             curl_setopt($ch, CURLOPT_POSTFIELDS, "$xml_data");
             curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:application/xml;charset=UTF-8'));
             curl_setopt($ch, CURLOPT_USERPWD, $mds_username . ":" . $mds_password);
             $curl_response = curl_exec($ch);
             $result['md_curl_response'] = $curl_response;
             $info1 = curl_getinfo($ch);
             $result['md_curl_status'] = $info1['http_code'];
             curl_close($ch) ;
         }

         if ($dataset && $result['md_curl_status'] == 201) {
             $doi_data = "doi=".$mds_prefix."/".$doi."\n"."url=http://gigadb.org/dataset/".$dataset->identifier ;
             $result['doi_data']  = $doi_data;
             $ch2= curl_init();
             curl_setopt($ch2, CURLOPT_URL, $mds_doi_url);
             curl_setopt($ch2, CURLOPT_POST, 1);
             curl_setopt($ch2, CURLOPT_RETURNTRANSFER, 1);
             curl_setopt($ch2, CURLOPT_POSTFIELDS, $doi_data);
             curl_setopt($ch2, CURLOPT_HTTPHEADER, array('Content-Type:application/xml;charset=UTF-8'));
             curl_setopt($ch2, CURLOPT_USERPWD, $mds_username . ":" . $mds_password);
             $curl_response = curl_exec($ch2);
             $result['doi_curl_response'] = $curl_response;
             $info2 = curl_getinfo($ch2);
             $result['doi_curl_status'] = $info2['http_code'];
             curl_close($ch2) ;
         }

         if (isset($result['doi_curl_status']) && $result['doi_curl_status'] == 201) {
             $result['status'] = true;
         }
     }

     echo json_encode($result);
     Yii::app()->end();
 }