start implementing ES transform helpers

1 files changed, 34 insertions, 0 deletions

diff --git a/fatcat_scholar/api_entities.py b/fatcat_scholar/api_entities.py
new file mode 100644
index 0000000..53455e8
--- /dev/null
+++ b/fatcat_scholar/api_entities.py
@@ -0,0 +1,34 @@
+
+import json
+import collections
+from fatcat_openapi_client import ApiClient
+
+def entity_to_dict(entity, api_client=None):
+    """
+    Hack to take advantage of the code-generated serialization code.
+
+    Initializing/destroying ApiClient objects is surprisingly expensive
+    (because it involves a threadpool), so we allow passing an existing
+    instance. If you already have a full-on API connection `api`, you can
+    access the ApiClient object as `api.api_client`. This is such a speed-up
+    that this argument may become mandatory.
+    """
+    if not api_client:
+        api_client = ApiClient()
+    return api_client.sanitize_for_serialization(entity)
+
+def entity_from_json(json_str, entity_type, api_client=None):
+    """
+    Hack to take advantage of the code-generated deserialization code
+
+    See note on `entity_to_dict()` about api_client argument.
+    """
+    if not api_client:
+        api_client = ApiClient()
+    thing = collections.namedtuple('Thing', ['data'])
+    thing.data = json_str
+    return api_client.deserialize(thing, entity_type)
+
+def entity_from_dict(obj, entity_type, api_client=None):
+    json_str = json.dumps(obj)
+    return entity_from_json(json_str, entity_type, api_client=api_client)