Add adhoc template variables

Change-Id: I884d9d54dedaaab586fa3c2e8228f40a2bd39d79

grafana_dashboards/schema/template/__init__.py

@@ -14,6 +14,7 @@
 
 import voluptuous as v
 
+from grafana_dashboards.schema.template.adhoc import Adhoc
 from grafana_dashboards.schema.template.base import Base
 from grafana_dashboards.schema.template.custom import Custom
 from grafana_dashboards.schema.template.datasource import Datasource
@@ -51,6 +52,8 @@ class Template(object):
                     schema = Custom().get_schema()
                 if template['type'] == 'datasource':
                     schema = Datasource().get_schema()
+                if template['type'] == 'adhoc':
+                    schema = Adhoc().get_schema()
 
                 res['list'].append(schema(template))
 

grafana_dashboards/schema/template/adhoc.py

@@ -0,0 +1,29 @@
+# Copyright 2018 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import voluptuous as v
+
+from grafana_dashboards.schema.template.base import Base
+
+
+class Adhoc(Base):
+
+    def get_schema(self):
+        query = {
+            v.Required('datasource'): v.All(str),
+            v.Optional('hide'): v.All(int, v.Range(min=0, max=2)),
+            v.Optional('label', default=''): v.All(str),
+        }
+        query.update(self.base)
+        return v.Schema(query)

grafana_dashboards/schema/template/base.py

@@ -66,7 +66,7 @@ class Base(object):
         self.base = {
             v.Required('name'): v.All(str, v.Length(min=1)),
             v.Required('type'): v.Any('query', 'interval', 'custom',
-                                      'datasource'),
+                                      'datasource', 'adhoc'),
         }
 
     def get_schema(self):

tests/schema/fixtures/dashboard-0032.json

@@ -0,0 +1,21 @@
+{
+    "dashboard": {
+        "new-dashboard": {
+            "rows": [],
+            "templating": {
+                "enabled": true,
+                "list": [
+                    {
+                        "datasource": "telegraf",
+                        "hide": 0,
+                        "label": "Influxdb filter",
+                        "name": "foobar",
+                        "type": "adhoc"
+                    }
+                ]
+            },
+            "timezone": "utc",
+            "title": "New dashboard"
+        }
+    }
+}

tests/schema/fixtures/dashboard-0032.yaml

@@ -0,0 +1,8 @@
+dashboard:
+  templating:
+    - name: foobar
+      datasource: telegraf
+      hide: 0
+      label: "Influxdb filter"
+      type: adhoc
+  title: New dashboard