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# -*- coding: utf-8 -*-
'''
Management of OpenStack Keystone Groups
=======================================

.. versionadded:: 2018.3.0

:depends: shade
:configuration: see :py:mod:`salt.modules.keystoneng` for setup instructions

Example States

.. code-block:: yaml

    create group:
      keystone_group.present:
        - name: group1

    delete group:
      keystone_group.absent:
        - name: group1

    create group with optional params:
      keystone_group.present:
        - name: group1
        - domain: domain1
        - description: 'my group'
'''

from __future__ import absolute_import, unicode_literals, print_function

__virtualname__ = 'keystone_group'


def __virtual__():
    if 'keystoneng.group_get' in __salt__:
        return __virtualname__
    return (False, 'The keystoneng execution module failed to load: shade python module is not available')


def _common(kwargs):
    '''
    Returns: None if group wasn't found, otherwise a group object
    '''
    search_kwargs = {'name': kwargs['name']}
    if 'domain' in kwargs:
        domain = __salt__['keystoneng.get_entity'](
                          'domain', name=kwargs.pop('domain'))
        domain_id = domain.id if hasattr(domain, 'id') else domain
        search_kwargs['filters'] = {'domain_id': domain_id}
        kwargs['domain'] = domain

    return __salt__['keystoneng.group_get'](**search_kwargs)


def present(name, auth=None, **kwargs):
    '''
    Ensure an group exists and is up-to-date

    name
        Name of the group

    domain
        The name or id of the domain

    description
        An arbitrary description of the group
    '''
    ret = {'name': name,
           'changes': {},
           'result': True,
           'comment': ''}

    __salt__['keystoneng.setup_cloud'](auth)

    kwargs = __utils__['args.clean_kwargs'](**kwargs)

    kwargs['name'] = name
    group = _common(kwargs)

    if group is None:
        if __opts__['test'] is True:
            ret['result'] = None
            ret['changes'] = kwargs
            ret['comment'] = 'Group will be created.'
            return ret

        group = __salt__['keystoneng.group_create'](**kwargs)
        ret['changes'] = group
        ret['comment'] = 'Created group'
        return ret

    changes = __salt__['keystoneng.compare_changes'](group, **kwargs)
    if changes:
        if __opts__['test'] is True:
            ret['result'] = None
            ret['changes'] = changes
            ret['comment'] = 'Group will be updated.'
            return ret

        __salt__['keystoneng.group_update'](**kwargs)
        ret['changes'].update(changes)
        ret['comment'] = 'Updated group'

    return ret


def absent(name, auth=None, **kwargs):
    '''
    Ensure group does not exist

    name
        Name of the group

    domain
        The name or id of the domain
    '''
    ret = {'name': name,
           'changes': {},
           'result': True,
           'comment': ''}

    kwargs = __utils__['args.clean_kwargs'](**kwargs)

    __salt__['keystoneng.setup_cloud'](auth)

    kwargs['name'] = name
    group = _common(kwargs)

    if group:
        if __opts__['test'] is True:
            ret['result'] = None
            ret['changes'] = {'id': group.id}
            ret['comment'] = 'Group will be deleted.'
            return ret

        __salt__['keystoneng.group_delete'](name=group)
        ret['changes']['id'] = group.id
        ret['comment'] = 'Deleted group'

    return ret

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