Rename bfxapi.utils to _utils (and update references).

bfxapi/_utils/json_encoder.py

@@ -0,0 +1,32 @@
+import json
+
+from decimal import Decimal
+
+from typing import List, Dict, Union
+
+JSON = Union[Dict[str, "JSON"], List["JSON"], bool, int, float, str, None]
+
+_CustomJSON = Union[Dict[str, "_CustomJSON"], List["_CustomJSON"], \
+    bool, int, float, str, Decimal, None]
+
+def _strip(dictionary: Dict) -> Dict:
+    return { key: value for key, value in dictionary.items() if value is not None }
+
+def _convert_data_to_json(data: _CustomJSON) -> JSON:
+    if isinstance(data, bool):
+        return int(data)
+    if isinstance(data, float):
+        return format(Decimal(repr(data)), "f")
+    if isinstance(data, Decimal):
+        return format(data, "f")
+
+    if isinstance(data, list):
+        return [ _convert_data_to_json(sub_data) for sub_data in data ]
+    if isinstance(data, dict):
+        return _strip({ key: _convert_data_to_json(value) for key, value in data.items() })
+
+    return data
+
+class JSONEncoder(json.JSONEncoder):
+    def encode(self, o: _CustomJSON) -> str:
+        return json.JSONEncoder.encode(self, _convert_data_to_json(o))