Merge pull request #136 from frgithubaccount/timestamp_added_to_csv_e…

…xport

address behaviour of rrdtool1.5+ to not export timestamp by default

share/pnp/application/models/data.php

@@ -1019,13 +1019,23 @@ public function xml2csv($string){
         foreach($xml->meta->legend->entry as $key=>$value){
             $csv .= ";" . $value ;
         }
+
+        /*
+        * from rrdtool 1.5 on, timestamp ( value->t ) is not set anymore
+        * from 1.6 on it can be reactivated by -- showrime option to rrdtool xport
+        * here we take care of the timestamp ourselves regardless which 
+        * rrdtool version is used
+        */
+        $timestamp2 = $xml->meta->start;
+        $step = $xml->meta->step;
         $csv .= "\n";
         foreach($xml->data->row as $key=>$value){
-            $csv .= (string) $value->t ;
+            $csv .= $timestamp2;
             foreach($value->v as $item){
                 $csv .= ";".floatval((string) $item);
             }
             $csv .= "\n";
+            $timestamp2 = $timestamp2 + $step;
         }
         return $csv;    
     }