Implement policy in code - workflow (10)

This commit migrate all workflow policies into code [1].

Like oslo.config, with oslo.policy, we can define all of
default rules in code base and only change some rules
via policy file. Another thing that we should use yaml
format instead of json format.

[1] https://governance.openstack.org/tc/goals/queens/policy-in-code.html
Co-authored-By: Dai Dang-Van <daidv@vn.fujitsu.com>

Change-Id: I8ab332abb5ebd4c67f8baf62c43ac3e9a10d7ee1

etc/policy.json

@@ -1,13 +1,6 @@
 {
     "default": "rule:admin_or_owner",
 
-    "workflows:create": "rule:admin_or_owner",
-    "workflows:delete": "rule:admin_or_owner",
-    "workflows:get": "rule:admin_or_owner",
-    "workflows:list": "rule:admin_or_owner",
-    "workflows:list:all_projects": "rule:admin_only",
-    "workflows:update": "rule:admin_or_owner",
-
     "event_triggers:create": "rule:admin_or_owner",
     "event_triggers:create:public": "rule:admin_only",
     "event_triggers:delete": "rule:admin_or_owner",

mistral/policies/__init__.py

@@ -24,6 +24,7 @@ from mistral.policies import member
 from mistral.policies import service
 from mistral.policies import task
 from mistral.policies import workbook
+from mistral.policies import workflow
 
 
 def list_rules():
@@ -37,5 +38,6 @@ def list_rules():
         member.list_rules(),
         service.list_rules(),
         task.list_rules(),
-        workbook.list_rules()
+        workbook.list_rules(),
+        workflow.list_rules()
     )

mistral/policies/workflow.py

@@ -0,0 +1,91 @@
+# All Rights Reserved.
+#
+#    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.
+from oslo_policy import policy
+
+from mistral.policies import base
+
+WORKFLOWS = 'workflows:%s'
+
+rules = [
+    policy.DocumentedRuleDefault(
+        name=WORKFLOWS % 'create',
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Create a new workflow.',
+        operations=[
+            {
+                'path': '/v2/workflows',
+                'method': 'POST'
+            }
+        ]
+    ),
+    policy.DocumentedRuleDefault(
+        name=WORKFLOWS % 'delete',
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Delete a workflow.',
+        operations=[
+            {
+                'path': '/v2/workflows',
+                'method': 'DELETE'
+            }
+        ]
+    ),
+    policy.DocumentedRuleDefault(
+        name=WORKFLOWS % 'get',
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Return the named workflow.',
+        operations=[
+            {
+                'path': '/v2/workflows/{workflow_id}',
+                'method': 'GET'
+            }
+        ]
+    ),
+    policy.DocumentedRuleDefault(
+        name=WORKFLOWS % 'list',
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Return a list of workflows.',
+        operations=[
+            {
+                'path': '/v2/workflows',
+                'method': 'GET'
+            }
+        ]
+    ),
+    policy.DocumentedRuleDefault(
+        name=WORKFLOWS % 'list:all_projects',
+        check_str=base.RULE_ADMIN_ONLY,
+        description='Return a list of workflows from all projects.',
+        operations=[
+            {
+                'path': '/v2/workflows',
+                'method': 'GET'
+            }
+        ]
+    ),
+    policy.DocumentedRuleDefault(
+        name=WORKFLOWS % 'update',
+        check_str=base.RULE_ADMIN_OR_OWNER,
+        description='Update one or more workflows.',
+        operations=[
+            {
+                'path': '/v2/workflows',
+                'method': 'PUT'
+            }
+        ]
+    )
+]
+
+
+def list_rules():
+    return rules

mistral/tests/unit/fake_policy.py

@@ -14,11 +14,4 @@
 
 policy_data = """{
     "default": "rule:admin_or_owner",
-
-    "workflows:create": "rule:admin_or_owner",
-    "workflows:delete": "rule:admin_or_owner",
-    "workflows:get": "rule:admin_or_owner",
-    "workflows:list": "rule:admin_or_owner",
-    "workflows:list:all_projects": "rule:admin_only",
-    "workflows:update": "rule:admin_or_owner",
 }"""