Added experimental cache support

src/libbot/cache/utils/_objects.py

@@ -0,0 +1,42 @@
+import logging
+from copy import deepcopy
+from logging import Logger
+from typing import Any
+
+try:
+    from ujson import dumps, loads
+except ImportError:
+    from json import dumps, loads
+
+logger: Logger = logging.getLogger(__name__)
+
+try:
+    from bson import ObjectId
+except ImportError:
+    logger.warning(
+        "Could not import bson.ObjectId. PyMongo conversions will not be supported by the cache. It's safe to ignore this message if you do not use MongoDB."
+    )
+
+
+def _json_to_string(json_object: Any) -> str:
+    json_object_copy: Any = deepcopy(json_object)
+
+    if isinstance(json_object_copy, dict) and "_id" in json_object_copy:
+        json_object_copy["_id"] = str(json_object_copy["_id"])
+
+    return dumps(json_object_copy, ensure_ascii=False, indent=0, escape_forward_slashes=False)
+
+
+def _string_to_json(json_string: str) -> Any:
+    json_object: Any = loads(json_string)
+
+    if "_id" in json_object:
+        try:
+            json_object["_id"] = ObjectId(json_object["_id"])
+        except NameError:
+            logger.debug(
+                "Tried to convert attribute '_id' with value '%s' but bson.ObjectId is not present, skipping the conversion.",
+                json_object["_id"],
+            )
+
+    return json_object