# Copyright 2016 Cloudbase Solutions Srl
# 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 nova.policies import base


BASE_POLICY_NAME = 'os_compute_api:os-extended-server-attributes'


extended_server_attributes_policies = [
    policy.DocumentedRuleDefault(
        name=BASE_POLICY_NAME,
        check_str=base.ADMIN,
        description="""Return extended attributes for server.

This rule will control the visibility for a set of servers attributes:

- ``OS-EXT-SRV-ATTR:host``
- ``OS-EXT-SRV-ATTR:instance_name``
- ``OS-EXT-SRV-ATTR:reservation_id`` (since microversion 2.3)
- ``OS-EXT-SRV-ATTR:launch_index`` (since microversion 2.3)
- ``OS-EXT-SRV-ATTR:hostname`` (since microversion 2.3)
- ``OS-EXT-SRV-ATTR:kernel_id`` (since microversion 2.3)
- ``OS-EXT-SRV-ATTR:ramdisk_id`` (since microversion 2.3)
- ``OS-EXT-SRV-ATTR:root_device_name`` (since microversion 2.3)
- ``OS-EXT-SRV-ATTR:user_data`` (since microversion 2.3)

Microvision 2.75 added the above attributes in the ``PUT /servers/{server_id}``
and ``POST /servers/{server_id}/action (rebuild)`` API responses which are
also controlled by this policy rule, like the ``GET /servers*`` APIs.

Microversion 2.90 made the ``OS-EXT-SRV-ATTR:hostname`` attribute available to
all users, so this policy has no effect on that field for microversions 2.90
and greater. Controlling the visibility of this attribute for all microversions
is therefore deprecated and will be removed in a future release.
""",
        operations=[
            {
                'method': 'GET',
                'path': '/servers/{id}'
            },
            {
                'method': 'GET',
                'path': '/servers/detail'
            },
            {
                'method': 'PUT',
                'path': '/servers/{server_id}'
            },
            {
                'method': 'POST',
                'path': '/servers/{server_id}/action (rebuild)'
            }
        ],
        scope_types=['project']
    ),
]


def list_rules():
    return extended_server_attributes_policies
