Allow to restrict measures by start and end timestamp

Author: haphan

src/Metric/v1/Gnocchi/Api.php

@@ -123,6 +123,8 @@ public function getResourceMetricMeasures(): array
                 'type'        => $this->params->resourceType(),
                 'granularity' => $this->params->granularity(),
                 'aggregation' => $this->params->aggregation(),
+                'start'       => $this->params->measureStart(),
+                'stop'        => $this->params->measureStop()
             ],
         ];
     }

src/Metric/v1/Gnocchi/Params.php

@@ -70,4 +70,24 @@ public function aggregation(): array
             'type'        => self::STRING_TYPE
         ];
     }
+
+    private function measureTimestamp(string $sentAs): array
+    {
+        return [
+            'location'  => self::QUERY,
+            'type'      => self::STRING_TYPE,
+            'sentAs'    => $sentAs,
+            'description' => 'Measure start timestamp which can be either a floating number (UNIX epoch) or an ISO8601 formatted timestamp'
+        ];
+    }
+
+    public function measureStart(): array
+    {
+        return $this->measureTimestamp('start');
+    }
+
+    public function measureStop(): array
+    {
+        return $this->measureTimestamp('stop');
+    }
 }