Add labels, update to Pubsub Subscription/Topic (#191)

Signed-off-by: Modular Magician <magic-modules@google.com>

plugins/modules/gcp_pubsub_topic.py

@@ -50,7 +50,12 @@ options:
   name:
     description:
     - Name of the topic.
+    required: true
+  labels:
+    description:
+    - A set of key/value label pairs to assign to this Topic.
     required: false
+    version_added: 2.8
 extends_documentation_fragment: gcp
 notes:
 - 'API Reference: U(https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics)'
@@ -73,6 +78,11 @@ name:
   - Name of the topic.
   returned: success
   type: str
+labels:
+  description:
+  - A set of key/value label pairs to assign to this Topic.
+  returned: success
+  type: dict
 '''
 
 ################################################################################
@@ -90,7 +100,11 @@ import json
 def main():
     """Main function"""
 
-    module = GcpModule(argument_spec=dict(state=dict(default='present', choices=['present', 'absent'], type='str'), name=dict(type='str')))
+    module = GcpModule(
+        argument_spec=dict(
+            state=dict(default='present', choices=['present', 'absent'], type='str'), name=dict(required=True, type='str'), labels=dict(type='dict')
+        )
+    )
 
     if not module.params['scopes']:
         module.params['scopes'] = ['https://www.googleapis.com/auth/pubsub']
@@ -128,8 +142,7 @@ def create(module, link):
 
 
 def update(module, link):
-    delete(module, self_link(module))
-    create(module, self_link(module))
+    module.fail_json(msg="Topic cannot be edited")
 
 
 def delete(module, link):
@@ -138,7 +151,7 @@ def delete(module, link):
 
 
 def resource_to_request(module):
-    request = {u'name': module.params.get('name')}
+    request = {u'name': module.params.get('name'), u'labels': module.params.get('labels')}
     request = encode_request(request, module)
     return_vals = {}
     for k, v in request.items():
@@ -206,7 +219,7 @@ def is_different(module, response):
 # Remove unnecessary properties from the response.
 # This is for doing comparisons with Ansible's current parameters.
 def response_to_hash(module, response):
-    return {u'name': response.get(u'name')}
+    return {u'name': response.get(u'name'), u'labels': response.get(u'labels')}
 
 
 def decode_request(response, module):