Refs #22047; added async branch which will improve the workflow of as…

…ync creation, in first try we will not allow the user to attempt another creation until the previous creation is completed or errored

eea/versions/versions.py

@@ -309,6 +309,7 @@ class CreateVersionAjax(object):
     def __init__(self, context, request):
         self.context = context
         self.request = request
+        self.annotations = self.context.__annotations__
 
     def __call__(self):
         # We use the view instead of calling create_version to allow for
@@ -318,12 +319,39 @@ def __call__(self):
 
         view = getMultiAdapter((self.context, self.request),
                                name="createVersion")
+        self.check_versioning_status()
         if getattr(view, 'has_custom_behaviour', False):
+            self.remove_versioning_status()
             return "SEEURL: %s/@@createVersion" % self.context.absolute_url()
         else:
+            self.set_versioning_status()
             view.create()
             return "OK"
 
+    def check_versioning_status(self):
+        """
+        :return:
+        :rtype:
+        """
+        if self.annotations.get('versioningInProgress'):
+            return "IN PROGRESS"
+        else:
+            return self.set_versioning_status()
+
+    def set_versioning_status(self):
+        """
+        :return:
+        :rtype:
+        """
+        self.annotations['versioningInProgress'] = True
+
+    def remove_versioning_status(self):
+        """
+        :return:
+        :rtype:
+        """
+        del(self.annotations['versioningInProgress'])
+
 
 def create_version(context, reindex=True):
     """ Create a new version of an object