Add ios_banner module (#22687)

With unit and integration tests.

lib/ansible/modules/network/ios/ios_banner.py

@@ -0,0 +1,163 @@
+#!/usr/bin/python
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+ANSIBLE_METADATA = {'metadata_version': '1.0',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+
+DOCUMENTATION = """
+---
+module: ios_banner
+version_added: "2.3"
+author: "Ricardo Carrillo Cruz (@rcarrillocruz)"
+short_description: Manage multiline banners on Cisco IOS devices
+description:
+  - This will configure both login and motd banners on remote devices
+    running Cisco IOS.  It allows playbooks to add or remote
+    banner text from the active running configuration.
+extends_documentation_fragment: ios
+options:
+  banner:
+    description:
+      - Specifies which banner that should be
+        configured on the remote device.
+    required: true
+    default: null
+    choices: ['login', 'banner']
+  text:
+    description:
+      - The banner text that should be
+        present in the remote device running configuration.  This argument
+        accepts a multiline string. Requires I(state=present).
+    default: null
+  state:
+    description:
+      - Specifies whether or not the configuration is
+        present in the current devices active running configuration.
+    default: present
+    choices: ['present', 'absent']
+"""
+
+EXAMPLES = """
+- name: configure the login banner
+  ios_banner:
+    banner: login
+    text: |
+      this is my login banner
+      that contains a multiline
+      string
+    state: present
+
+- name: remove the motd banner
+  ios_banner:
+    banner: motd
+    state: absent
+"""
+
+RETURN = """
+commands:
+  description: The list of configuration mode commands to send to the device
+  returned: always
+  type: list
+  sample:
+    - banner login
+    - this is my login banner
+    - that contains a multiline
+    - string
+"""
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.ios import load_config, run_commands
+from ansible.module_utils.ios import ios_argument_spec, check_args
+
+def map_obj_to_commands(updates, module):
+    commands = list()
+    want, have = updates
+    state = module.params['state']
+
+    if state == 'absent' and have['text']:
+        commands.append('no banner %s' % module.params['banner'])
+
+    elif state == 'present':
+        if want['text'] and (want['text'] != have.get('text')):
+            banner_cmd = 'banner %s' % module.params['banner']
+            banner_cmd += ' @\n'
+            banner_cmd += want['text'].strip()
+            banner_cmd += '\n@'
+            commands.append(banner_cmd)
+
+    return commands
+
+def map_config_to_obj(module):
+    output = run_commands(module, ['show banner %s' % module.params['banner']])
+    obj = {'banner': module.params['banner'], 'state': 'absent'}
+    if output:
+        obj['text'] = output[0]
+        obj['state'] = 'present'
+    return obj
+
+def map_params_to_obj(module):
+    text = module.params['text']
+    if text:
+        text = str(text).strip()
+
+    return {
+        'banner': module.params['banner'],
+        'text': text,
+        'state': module.params['state']
+    }
+
+def main():
+    """ main entry point for module execution
+    """
+    argument_spec = dict(
+        banner=dict(required=True, choices=['login', 'motd']),
+        text=dict(),
+        state=dict(default='present', choices=['present', 'absent'])
+    )
+
+    argument_spec.update(ios_argument_spec)
+
+    required_if = [('state', 'present', ('text',))]
+
+    module = AnsibleModule(argument_spec=argument_spec,
+                           required_if=required_if,
+                           supports_check_mode=True)
+
+    warnings = list()
+    check_args(module, warnings)
+
+    result = {'changed': False}
+    if warnings:
+        result['warnings'] = warnings
+    want = map_params_to_obj(module)
+    have = map_config_to_obj(module)
+
+    commands = map_obj_to_commands((want, have), module)
+    result['commands'] = commands
+
+    if commands:
+        if not module.check_mode:
+            response = load_config(module, commands)
+
+        result['changed'] = True
+
+    module.exit_json(**result)
+
+if __name__ == '__main__':
+    main()