feat: allow renaming a server (#619)

##### SUMMARY

Fixes #600

Allow renaming a server by passing its id and its new name.

##### ISSUE TYPE

- Feature Pull Request


##### COMPONENT NAME

server

changelogs/fragments/renaming-a-server.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - server - Allow renaming a server.

plugins/modules/server.py

@@ -564,10 +564,20 @@ class AnsibleHCloudServer(AnsibleHCloud):
         try:
             previous_server_status = self.hcloud_server.status
 
+            update_params = {}
+
+            name = self.module.params.get("name")
+            if name is not None and self.hcloud_server.name != name:
+                self.module.fail_on_missing_params(required_params=["id"])
+                update_params["name"] = name
+
             labels = self.module.params.get("labels")
             if labels is not None and labels != self.hcloud_server.labels:
+                update_params["labels"] = labels
+
+            if update_params:
                 if not self.module.check_mode:
-                    self.hcloud_server.update(labels=labels)
+                    self.hcloud_server.update(**update_params)
                 self._mark_as_changed()
 
             rescue_mode = self.module.params.get("rescue_mode")

tests/integration/targets/server/tasks/test_basic.yml

@@ -40,6 +40,28 @@
     that:
       - result is not changed
 
+- name: test rename server
+  hetzner.hcloud.server:
+    id: "{{ main_server.hcloud_server.id }}"
+    name: "{{ hcloud_server_name }}-new"
+  register: result
+- name: verify rename server
+  assert:
+    that:
+      - result is changed
+      - result.hcloud_server.name == hcloud_server_name + '-new'
+
+- name: reset server name
+  hetzner.hcloud.server:
+    id: "{{ main_server.hcloud_server.id }}"
+    name: "{{ hcloud_server_name }}"
+  register: result
+- name: verify reset server name
+  assert:
+    that:
+      - result is changed
+      - result.hcloud_server.name == hcloud_server_name
+
 - name: test stop server with check mode
   hetzner.hcloud.server:
     name: "{{ hcloud_server_name }}"