feat(realm_info): add plugin for retrieving realms

plugins/module_utils/proxmox_api.py

@@ -0,0 +1,34 @@
+from dataclasses import dataclass
+from typing import List
+
+import requests
+
+API_BASE_PATH: str = "/api2/json"
+
+@dataclass()
+class ProxmoxAuthInfo:
+    instance_url: str
+    token_id: str
+    secret: str
+    verify_cert: bool = True
+
+@dataclass(frozen=True)
+class ProxmoxRealm:
+    type: str
+    realm: str
+    comment: str = None
+    default: bool = False
+
+def get_realms(auth_info: ProxmoxAuthInfo) -> List['ProxmoxRealm']:
+    realm_answer = requests.get(
+        f"{auth_info.instance_url}{API_BASE_PATH}/access/domains",
+        headers={"Authorization": _get_token_from_authinfo(auth_info)},
+        verify=auth_info.verify_cert
+    ).json()
+    return list(map(
+        lambda r: ProxmoxRealm(r['type'], r['realm'], r.get('comment', None), r.get('default', False)),
+        realm_answer['data']
+    ))
+
+def _get_token_from_authinfo(auth_info: ProxmoxAuthInfo) -> str:
+    return f"PVEAPIToken={auth_info.token_id}={auth_info.secret}"