Add basic support for cloning batches

For now only label batches support this by default

tailbone/templates/newbatch/view.mako

@@ -33,6 +33,9 @@
   % if master.rows_downloadable and request.has_perm('{}.csv'.format(permission_prefix)):
       <li>${h.link_to("Download row data as CSV", url('{}.csv'.format(route_prefix), uuid=batch.uuid))}</li>
   % endif
+  % if master.cloneable and request.has_perm('{}.clone'.format(permission_prefix)):
+      <li>${h.link_to("Clone as new batch", url('{}.clone'.format(route_prefix), uuid=batch.uuid))}</li>
+  % endif
 </%def>
 
 <%def name="buttons()">

tailbone/views/batch/core.py

@@ -70,6 +70,7 @@ class BatchMasterView(MasterView):
     refreshable = True
     refresh_after_create = False
     edit_with_rows = False
+    cloneable = False
 
     def __init__(self, request):
         super(BatchMasterView, self).__init__(request)
@@ -825,6 +826,14 @@ class BatchMasterView(MasterView):
             csvrow[field] = '' if value is None else unicode(value)
         return csvrow
 
+    def clone(self):
+        """
+        Clone current batch as new batch
+        """
+        batch = self.get_instance()
+        batch = self.handler.clone(batch, created_by=self.request.user)
+        return self.redirect(self.get_action_url('view', batch))
+
     @classmethod
     def defaults(cls, config):
         cls._batch_defaults(config)
@@ -876,6 +885,14 @@ class BatchMasterView(MasterView):
             config.add_tailbone_permission(permission_prefix, '{}.csv'.format(permission_prefix),
                                            "Download {} rows as CSV".format(model_title))
 
+        # clone as new batch
+        if cls.cloneable:
+            config.add_route('{}.clone'.format(route_prefix), '{}/{{uuid}}/clone'.format(url_prefix))
+            config.add_view(cls, attr='clone', route_name='{}.clone'.format(route_prefix),
+                            permission='{}.clone'.format(permission_prefix))
+            config.add_tailbone_permission(permission_prefix, '{}.clone'.format(permission_prefix),
+                                           "Clone {} as new batch".format(model_title))
+
 
 class FileBatchMasterView(BatchMasterView):
     """

tailbone/views/labels/batch.py

@@ -45,6 +45,7 @@ class LabelBatchView(BatchMasterView):
     creatable = False
     editable = False
     rows_editable = True
+    cloneable = True
 
     def _preconfigure_fieldset(self, fs):
         super(LabelBatchView, self)._preconfigure_fieldset(fs)