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Filename : keycloak_clienttemplate.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-

# Copyright (c) 2017, Eike Frost <ei@kefro.st>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type

ANSIBLE_METADATA = {
    'metadata_version': '1.1',
    'status': ['preview'],
    'supported_by': 'community'
}

DOCUMENTATION = '''
---
module: keycloak_clienttemplate

short_description: Allows administration of Keycloak client templates via Keycloak API

version_added: "2.5"

description:
    - This module allows the administration of Keycloak client templates via the Keycloak REST API. It
      requires access to the REST API via OpenID Connect; the user connecting and the client being
      used must have the requisite access rights. In a default Keycloak installation, admin-cli
      and an admin user would work, as would a separate client definition with the scope tailored
      to your needs and a user having the expected roles.

    - The names of module options are snake_cased versions of the camelCase ones found in the
      Keycloak API and its documentation at U(http://www.keycloak.org/docs-api/3.3/rest-api/)

    - The Keycloak API does not always enforce for only sensible settings to be used -- you can set
      SAML-specific settings on an OpenID Connect client for instance and vice versa. Be careful.
      If you do not specify a setting, usually a sensible default is chosen.

options:
    state:
        description:
            - State of the client template
            - On C(present), the client template will be created (or updated if it exists already).
            - On C(absent), the client template will be removed if it exists
        choices: ['present', 'absent']
        default: 'present'

    id:
        description:
            - Id of client template to be worked on. This is usually a UUID.

    realm:
        description:
            - Realm this client template is found in.

    name:
        description:
            - Name of the client template

    description:
        description:
            - Description of the client template in Keycloak

    protocol:
        description:
            - Type of client template (either C(openid-connect) or C(saml).
        choices: ['openid-connect', 'saml']

    full_scope_allowed:
        description:
            - Is the "Full Scope Allowed" feature set for this client template or not.
              This is 'fullScopeAllowed' in the Keycloak REST API.
        type: bool

    protocol_mappers:
        description:
            - a list of dicts defining protocol mappers for this client template.
              This is 'protocolMappers' in the Keycloak REST API.
        suboptions:
            consentRequired:
                description:
                    - Specifies whether a user needs to provide consent to a client for this mapper to be active.

            consentText:
                description:
                    - The human-readable name of the consent the user is presented to accept.

            id:
                description:
                    - Usually a UUID specifying the internal ID of this protocol mapper instance.

            name:
                description:
                    - The name of this protocol mapper.

            protocol:
                description:
                    - is either 'openid-connect' or 'saml', this specifies for which protocol this protocol mapper
                      is active.
                choices: ['openid-connect', 'saml']

            protocolMapper:
                description:
                    - The Keycloak-internal name of the type of this protocol-mapper. While an exhaustive list is
                      impossible to provide since this may be extended through SPIs by the user of Keycloak,
                      by default Keycloak as of 3.4 ships with at least
                    - C(docker-v2-allow-all-mapper)
                    - C(oidc-address-mapper)
                    - C(oidc-full-name-mapper)
                    - C(oidc-group-membership-mapper)
                    - C(oidc-hardcoded-claim-mapper)
                    - C(oidc-hardcoded-role-mapper)
                    - C(oidc-role-name-mapper)
                    - C(oidc-script-based-protocol-mapper)
                    - C(oidc-sha256-pairwise-sub-mapper)
                    - C(oidc-usermodel-attribute-mapper)
                    - C(oidc-usermodel-client-role-mapper)
                    - C(oidc-usermodel-property-mapper)
                    - C(oidc-usermodel-realm-role-mapper)
                    - C(oidc-usersessionmodel-note-mapper)
                    - C(saml-group-membership-mapper)
                    - C(saml-hardcode-attribute-mapper)
                    - C(saml-hardcode-role-mapper)
                    - C(saml-role-list-mapper)
                    - C(saml-role-name-mapper)
                    - C(saml-user-attribute-mapper)
                    - C(saml-user-property-mapper)
                    - C(saml-user-session-note-mapper)
                    - An exhaustive list of available mappers on your installation can be obtained on
                      the admin console by going to Server Info -> Providers and looking under
                      'protocol-mapper'.

            config:
                description:
                    - Dict specifying the configuration options for the protocol mapper; the
                      contents differ depending on the value of I(protocolMapper) and are not documented
                      other than by the source of the mappers and its parent class(es). An example is given
                      below. It is easiest to obtain valid config values by dumping an already-existing
                      protocol mapper configuration through check-mode in the "existing" field.

    attributes:
        description:
            - A dict of further attributes for this client template. This can contain various
              configuration settings, though in the default installation of Keycloak as of 3.4, none
              are documented or known, so this is usually empty.

notes:
- The Keycloak REST API defines further fields (namely I(bearerOnly), I(consentRequired), I(standardFlowEnabled),
  I(implicitFlowEnabled), I(directAccessGrantsEnabled), I(serviceAccountsEnabled), I(publicClient), and
  I(frontchannelLogout)) which, while available with keycloak_client, do not have any effect on
  Keycloak client-templates and are discarded if supplied with an API request changing client-templates. As such,
  they are not available through this module.

extends_documentation_fragment:
    - keycloak

author:
    - Eike Frost (@eikef)
'''

EXAMPLES = '''
- name: Create or update Keycloak client template (minimal)
  local_action:
    module: keycloak_clienttemplate
    auth_client_id: admin-cli
    auth_keycloak_url: https://auth.example.com/auth
    auth_realm: master
    auth_username: USERNAME
    auth_password: PASSWORD
    realm: master
    name: this_is_a_test

- name: delete Keycloak client template
  local_action:
    module: keycloak_clienttemplate
    auth_client_id: admin-cli
    auth_keycloak_url: https://auth.example.com/auth
    auth_realm: master
    auth_username: USERNAME
    auth_password: PASSWORD
    realm: master
    state: absent
    name: test01

- name: Create or update Keycloak client template (with a protocol mapper)
  local_action:
    module: keycloak_clienttemplate
    auth_client_id: admin-cli
    auth_keycloak_url: https://auth.example.com/auth
    auth_realm: master
    auth_username: USERNAME
    auth_password: PASSWORD
    realm: master
    name: this_is_a_test
    protocol_mappers:
      - config:
          access.token.claim: True
          claim.name: "family_name"
          id.token.claim: True
          jsonType.label: String
          user.attribute: lastName
          userinfo.token.claim: True
        consentRequired: True
        consentText: "${familyName}"
        name: family name
        protocol: openid-connect
        protocolMapper: oidc-usermodel-property-mapper
    full_scope_allowed: false
    id: bce6f5e9-d7d3-4955-817e-c5b7f8d65b3f
'''

RETURN = '''
msg:
  description: Message as to what action was taken
  returned: always
  type: str
  sample: "Client template testclient has been updated"

proposed:
    description: client template representation of proposed changes to client template
    returned: always
    type: dict
    sample: {
      name: "test01"
    }
existing:
    description: client template representation of existing client template (sample is truncated)
    returned: always
    type: dict
    sample: {
        "description": "test01",
        "fullScopeAllowed": false,
        "id": "9c3712ab-decd-481e-954f-76da7b006e5f",
        "name": "test01",
        "protocol": "saml"
    }
end_state:
    description: client template representation of client template after module execution (sample is truncated)
    returned: always
    type: dict
    sample: {
        "description": "test01",
        "fullScopeAllowed": false,
        "id": "9c3712ab-decd-481e-954f-76da7b006e5f",
        "name": "test01",
        "protocol": "saml"
    }
'''

from ansible.module_utils.identity.keycloak.keycloak import KeycloakAPI, camel, \
    keycloak_argument_spec, get_token, KeycloakError
from ansible.module_utils.basic import AnsibleModule


def main():
    """
    Module execution

    :return:
    """
    argument_spec = keycloak_argument_spec()

    protmapper_spec = dict(
        consentRequired=dict(type='bool'),
        consentText=dict(type='str'),
        id=dict(type='str'),
        name=dict(type='str'),
        protocol=dict(type='str', choices=['openid-connect', 'saml']),
        protocolMapper=dict(type='str'),
        config=dict(type='dict'),
    )

    meta_args = dict(
        realm=dict(type='str', default='master'),
        state=dict(default='present', choices=['present', 'absent']),

        id=dict(type='str'),
        name=dict(type='str'),
        description=dict(type='str'),
        protocol=dict(type='str', choices=['openid-connect', 'saml']),
        attributes=dict(type='dict'),
        full_scope_allowed=dict(type='bool'),
        protocol_mappers=dict(type='list', elements='dict', options=protmapper_spec),
    )
    argument_spec.update(meta_args)

    module = AnsibleModule(argument_spec=argument_spec,
                           supports_check_mode=True,
                           required_one_of=([['id', 'name']]))

    result = dict(changed=False, msg='', diff={}, proposed={}, existing={}, end_state={})

    # Obtain access token, initialize API
    try:
        connection_header = get_token(
            base_url=module.params.get('auth_keycloak_url'),
            validate_certs=module.params.get('validate_certs'),
            auth_realm=module.params.get('auth_realm'),
            client_id=module.params.get('auth_client_id'),
            auth_username=module.params.get('auth_username'),
            auth_password=module.params.get('auth_password'),
            client_secret=module.params.get('auth_client_secret'),
        )
    except KeycloakError as e:
        module.fail_json(msg=str(e))
    kc = KeycloakAPI(module, connection_header)

    realm = module.params.get('realm')
    state = module.params.get('state')
    cid = module.params.get('id')

    # convert module parameters to client representation parameters (if they belong in there)
    clientt_params = [x for x in module.params
                      if x not in ['state', 'auth_keycloak_url', 'auth_client_id', 'auth_realm',
                                   'auth_client_secret', 'auth_username', 'auth_password',
                                   'validate_certs', 'realm'] and module.params.get(x) is not None]

    # See whether the client template already exists in Keycloak
    if cid is None:
        before_clientt = kc.get_client_template_by_name(module.params.get('name'), realm=realm)
        if before_clientt is not None:
            cid = before_clientt['id']
    else:
        before_clientt = kc.get_client_template_by_id(cid, realm=realm)

    if before_clientt is None:
        before_clientt = dict()

    result['existing'] = before_clientt

    # Build a proposed changeset from parameters given to this module
    changeset = dict()

    for clientt_param in clientt_params:
        # lists in the Keycloak API are sorted
        new_param_value = module.params.get(clientt_param)
        if isinstance(new_param_value, list):
            try:
                new_param_value = sorted(new_param_value)
            except TypeError:
                pass
        changeset[camel(clientt_param)] = new_param_value

    # Whether creating or updating a client, take the before-state and merge the changeset into it
    updated_clientt = before_clientt.copy()
    updated_clientt.update(changeset)

    result['proposed'] = changeset

    # If the client template does not exist yet, before_client is still empty
    if before_clientt == dict():
        if state == 'absent':
            # do nothing and exit
            if module._diff:
                result['diff'] = dict(before='', after='')
            result['msg'] = 'Client template does not exist, doing nothing.'
            module.exit_json(**result)

        # create new client template
        result['changed'] = True
        if 'name' not in updated_clientt:
            module.fail_json(msg='name needs to be specified when creating a new client')

        if module._diff:
            result['diff'] = dict(before='', after=updated_clientt)

        if module.check_mode:
            module.exit_json(**result)

        kc.create_client_template(updated_clientt, realm=realm)
        after_clientt = kc.get_client_template_by_name(updated_clientt['name'], realm=realm)

        result['end_state'] = after_clientt

        result['msg'] = 'Client template %s has been created.' % updated_clientt['name']
        module.exit_json(**result)
    else:
        if state == 'present':
            # update existing client template
            result['changed'] = True
            if module.check_mode:
                # We can only compare the current client template with the proposed updates we have
                if module._diff:
                    result['diff'] = dict(before=before_clientt,
                                          after=updated_clientt)

                module.exit_json(**result)

            kc.update_client_template(cid, updated_clientt, realm=realm)

            after_clientt = kc.get_client_template_by_id(cid, realm=realm)
            if before_clientt == after_clientt:
                result['changed'] = False
            if module._diff:
                result['diff'] = dict(before=before_clientt,
                                      after=after_clientt)
            result['end_state'] = after_clientt

            result['msg'] = 'Client template %s has been updated.' % updated_clientt['name']
            module.exit_json(**result)
        else:
            # Delete existing client
            result['changed'] = True
            if module._diff:
                result['diff']['before'] = before_clientt
                result['diff']['after'] = ''

            if module.check_mode:
                module.exit_json(**result)

            kc.delete_client_template(cid, realm=realm)
            result['proposed'] = dict()
            result['end_state'] = dict()
            result['msg'] = 'Client template %s has been deleted.' % before_clientt['name']
            module.exit_json(**result)

    module.exit_json(**result)


if __name__ == '__main__':
    main()