adding helper functions for kadi

cbutil/kadi_helper.py

+from dateutil import parser
+from datetime import datetime
+from cbutil.util import remove_none
+import logging
+import builtins
+logger = logging.getLogger(__file__)
+
+
+def create_metadatum(key: str, type_name: str, value, **kwargs) -> dict:
+    """ Create a dict so that it can be used for kadiapy is add_metadatum."""
+    if isinstance(type_name, type):
+        type_name = type_name.__name__
+    return {"key": key,
+            "type": type_name,
+            "value": value,
+            **kwargs}
+
+
+def get_type_name(value) -> str:
+    if not isinstance(value, str):
+        return type(value).__name__
+    for possible_type in [int, float]:
+        try:
+            possible_type(value)
+        except ValueError:
+            pass
+        else:
+            return possible_type.__name__
+
+    try:
+        parser.parse(value)
+    except ValueError:
+        logger.info(f"{value} could not be parse as date")
+        pass
+    else:
+        return "date"
+
+    return str.__name__
+
+
+def handle_dates(value) -> str:
+    try:
+        return str(datetime.fromtimestamp(int(value)))
+    except (ValueError, OverflowError, OSError):
+        pass
+    return value
+
+
+def transform_to_type(type_name, value: str):
+    try:
+        return getattr(builtins, type_name)(value)
+    except AttributeError as e:
+        raise ValueError(f"could not transform {value} to {type_name} {e}")
+
+
+def build_meta_data(tags: dict):
+    for key, value in remove_none(tags).items():
+        type_name = get_type_name(value)
+        if key == "time" or type_name == "date":
+            type_name = "date"
+            value = handle_dates(value)
+        else:
+            value = transform_to_type(type_name, value)
+        yield create_metadatum(key, type_name, value)