Add simple row status breakdown when viewing batch

tailbone/views/batch/core.py

@@ -159,8 +159,29 @@ class BatchMasterView(MasterView):
             kwargs['execute_form'] = self.make_execute_form(batch, action_url=url)
         else:
             kwargs['why_not_execute'] = self.handler.why_not_execute(batch)
+        kwargs['status_breakdown'] = self.make_status_breakdown(batch)
         return kwargs
 
+    def make_status_breakdown(self, batch):
+        """
+        Returns a simple list of 2-tuples, each of which has the status display
+        title as first member, and number of rows with that status as second
+        member.
+        """
+        breakdown = {}
+        for row in batch.active_rows():
+            if row.status_code not in breakdown:
+                breakdown[row.status_code] = {
+                    'code': row.status_code,
+                    'title': row.STATUS[row.status_code],
+                    'count': 0,
+                }
+            breakdown[row.status_code]['count'] += 1
+        breakdown = [
+            (status['title'], status['count'])
+            for code, status in six.iteritems(breakdown)]
+        return breakdown
+
     def allow_worksheet(self, batch):
         return not batch.executed and not batch.complete