Code cleanup

Author: eric-forte-elastic

detection_rules/misc.py

@@ -489,3 +489,16 @@ def _wrapped(*args: Any, **kwargs: Any) -> Any:  # noqa: PLR0912
         return _wrapped
 
     return _wrapper
+
+
+def get_simulated_index_template_mappings(elastic_client: Elasticsearch, name: str) -> dict[str, Any]:
+    """
+    Return the mappings from the index configuration that would be applied
+    to the specified index from an existing index template
+
+    https://elasticsearch-py.readthedocs.io/en/stable/api/indices.html#elasticsearch.client.IndicesClient.simulate_index_template
+    """
+    template = elastic_client.indices.simulate_index_template(name=name)
+    if not template:
+        return {}
+    return template["template"]["mappings"]["properties"]