From 559257e48360267b60bcbe39d78affb1125fff20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs=20Espino?= <jesus.espino@kaleidos.net>
Date: Thu, 14 Nov 2013 17:42:42 +0100
Subject: [PATCH] Adding projects tags api action

---
 greenmine/projects/aggregates/tags.py | 32 +++++++++++++++++++++++++++
 greenmine/projects/api.py             |  6 +++++
 2 files changed, 38 insertions(+)
 create mode 100644 greenmine/projects/aggregates/tags.py

diff --git a/greenmine/projects/aggregates/tags.py b/greenmine/projects/aggregates/tags.py
new file mode 100644
index 00000000..be7478a5
--- /dev/null
+++ b/greenmine/projects/aggregates/tags.py
@@ -0,0 +1,32 @@
+from contextlib import closing
+from django.db import connection
+
+def _get_issues_tags(project):
+    extra_sql = ("select unnest(unpickle(tags)) as tagname "
+                 "from issues_issue where project_id = %s "
+                 "group by unnest(unpickle(tags)) "
+                 "order by tagname asc")
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return set([x[0] for x in rows])
+
+def _get_stories_tags(project):
+    extra_sql = ("select unnest(unpickle(tags)) as tagname, count(unnest(unpickle(tags))) "
+                 "from userstories_userstory where project_id = %s "
+                 "group by unnest(unpickle(tags)) "
+                 "order by tagname asc")
+
+    with closing(connection.cursor()) as cursor:
+        cursor.execute(extra_sql, [project.id])
+        rows = cursor.fetchall()
+
+    return set([x[0] for x in rows])
+
+def get_all_tags(project):
+    result = set()
+    result.update(_get_issues_tags(project))
+    result.update(_get_stories_tags(project))
+    return sorted(result)
diff --git a/greenmine/projects/api.py b/greenmine/projects/api.py
index 2b1544a9..e4c8653f 100644
--- a/greenmine/projects/api.py
+++ b/greenmine/projects/api.py
@@ -9,6 +9,7 @@ from rest_framework.decorators import detail_route
 from greenmine.base import filters
 from greenmine.base.api import ModelCrudViewSet, ModelListViewSet
 from greenmine.base.notifications.api import NotificationSenderMixin
+from greenmine.projects.aggregates.tags import get_all_tags
 
 from . import serializers
 from . import models
@@ -39,6 +40,11 @@ class ProjectViewSet(ModelCrudViewSet):
         project = self.get_object()
         return Response(filters_aggr.get_issues_filters_data(project))
 
+    @detail_route(methods=['get'])
+    def tags(self, request, pk=None):
+        project = self.get_object()
+        return Response(get_all_tags(project))
+
     def get_queryset(self):
         qs = super(ProjectViewSet, self).get_queryset()
         qs = qs.filter(Q(owner=self.request.user) |