vm: added has_ercentage and get_percentage to activities

circle/vm/models/activity.py

@@ -116,6 +116,17 @@ class InstanceActivity(ActivityModel):
         else:
             return 'failed'
 
+    def has_percentage(self):
+        op = self.instance.get_operation_from_activity_code(self.activity_code)
+        return (self.task_uuid and op and op.has_percentage
+                and not self.finished)
+
+    def get_percentage(self):
+        """Returns the percentage of the running operation if available.
+        """
+        if self.has_percentage():
+            celery.AsyncResult(id=self.task_uuid).info.get("percent")
+
     @property
     def is_abortable(self):
         """Can the activity be aborted?