Refactor v3 API to support filtering

Fixes: bug #1175356

Future implementations of keystone API v3 will support server-side
filtering using key/value attributes. See additional details:
https://github.com/openstack/identity-api/blob/master/openstack-identity-api/src/markdown/identity-api-v3.md#list-entities-filtered-by-attribute

To support this functionality **kwargs need to be passed from the
v3 API classes to keystoneclient.base.CrudManager.list.

This is not fully implemented server-side for all attributes so it's difficult to
document exactly which attributes will work. An example of a working attribute is:
keystone.users.list(name="someone")

Change-Id: I148093fbe37700f890ed44148aa3f63f34ee5ff5

keystoneclient/v3/endpoints.py

@@ -61,14 +61,20 @@ class EndpointManager(base.CrudManager):
         return super(EndpointManager, self).get(
             endpoint_id=base.getid(endpoint))
 
-    def list(self, service=None, name=None, interface=None, region=None,
-             enabled=None):
+    def list(self, service=None, interface=None, region=None,
+             enabled=None, **kwargs):
+        """List endpoints.
+
+        If ``**kwargs`` are provided, then filter endpoints with
+        attributes matching ``**kwargs``.
+        """
         self._validate_interface(interface)
         return super(EndpointManager, self).list(
             service_id=base.getid(service),
             interface=interface,
             region=region,
-            enabled=enabled)
+            enabled=enabled,
+            **kwargs)
 
     def update(self, endpoint, service=None, url=None, name=None,
                interface=None, region=None, enabled=None):

keystoneclient/v3/groups.py

@@ -55,13 +55,22 @@ class GroupManager(base.CrudManager):
             domain_id=base.getid(domain),
             description=description)
 
-    def list(self, user=None):
+    def list(self, user=None, **kwargs):
+        """List groups.
+
+        If user is provided, then filter groups with
+        that attribute.
+
+        If ``**kwargs`` are provided, then filter groups with
+        attributes matching ``**kwargs``.
+        """
         if user:
             base_url = '/users/%s' % base.getid(user)
         else:
             base_url = None
         return super(GroupManager, self).list(
-            base_url=base_url)
+            base_url=base_url,
+            **kwargs)
 
     def get(self, group):
         return super(GroupManager, self).get(

keystoneclient/v3/projects.py

@@ -58,11 +58,20 @@ class ProjectManager(base.CrudManager):
             description=description,
             enabled=enabled)
 
-    def list(self, domain=None, user=None):
+    def list(self, domain=None, user=None, **kwargs):
+        """List projects.
+
+        If domain or user are provided, then filter projects with
+        those attributes.
+
+        If ``**kwargs`` are provided, then filter projects with
+        attributes matching ``**kwargs``.
+        """
         base_url = '/users/%s' % base.getid(user) if user else None
         return super(ProjectManager, self).list(
             base_url=base_url,
-            domain_id=base.getid(domain))
+            domain_id=base.getid(domain),
+            **kwargs)
 
     def get(self, project):
         return super(ProjectManager, self).get(

keystoneclient/v3/roles.py

@@ -74,13 +74,16 @@ class RoleManager(base.CrudManager):
         return super(RoleManager, self).get(
             role_id=base.getid(role))
 
-    def list(self, user=None, group=None, domain=None, project=None):
+    def list(self, user=None, group=None, domain=None, project=None, **kwargs):
         """Lists roles and role grants.
 
-        If no arguments are provided, all roles in the system will be listed.
+        If no arguments are provided, all roles in the system will be
+        listed.
 
         If a user or group is specified, you must also specify either a
-        domain or project to list role grants on that pair.
+        domain or project to list role grants on that pair. And if
+        ``**kwargs`` are provided, then also filter roles with
+        attributes matching ``**kwargs``.
         """
 
         if user or group:
@@ -89,7 +92,8 @@ class RoleManager(base.CrudManager):
 
             return super(RoleManager, self).list(
                 base_url=self._role_grants_base_url(user, group,
-                                                    domain, project))
+                                                    domain, project),
+                **kwargs)
 
         return super(RoleManager, self).list()
 

keystoneclient/v3/users.py

@@ -49,7 +49,15 @@ class UserManager(base.CrudManager):
             description=description,
             enabled=enabled)
 
-    def list(self, project=None, domain=None, group=None):
+    def list(self, project=None, domain=None, group=None, **kwargs):
+        """List users.
+
+        If project, domain or group are provided, then filter
+        users with those attributes.
+
+        If ``**kwargs`` are provided, then filter users with
+        attributes matching ``**kwargs``.
+        """
         if group:
             base_url = '/groups/%s' % base.getid(group)
         else:
@@ -58,7 +66,8 @@ class UserManager(base.CrudManager):
         return super(UserManager, self).list(
             base_url=base_url,
             domain_id=base.getid(domain),
-            project_id=base.getid(project))
+            project_id=base.getid(project),
+            **kwargs)
 
     def get(self, user):
         return super(UserManager, self).get(