Add module to write party to TOML document

CHANGELOG.md

@@ -3,6 +3,8 @@
 
 ## 0.6.0 (unreleased)
 
+- Added module to write a party to a TOML document.
+
 
 ## 0.5.0 (2024-06-30)
 

pyproject.toml

@@ -5,7 +5,9 @@ description = "Python library for the OrgaTalk LAN Party Database"
 authors = [
     { name = "Jochen Kupperschmidt", email = "[email protected]" }
 ]
-dependencies = []
+dependencies = [
+    "tomlkit>=0.12.5",
+]
 readme = "README.md"
 requires-python = ">= 3.11"
 license = { text = "MIT" }

src/lanpartydb/writing.py

@@ -0,0 +1,48 @@
+"""
+lanpartydb.writing
+~~~~~~~~~~~~~~~~~~
+
+Data writing
+
+:Copyright: 2024 Jochen Kupperschmidt
+:License: MIT
+"""
+
+import dataclasses
+from typing import Any
+
+from lanpartydb.models import Party
+import tomlkit
+
+
+# party
+
+
+def serialize_party(party: Party) -> str:
+    """Serialize party to TOML document."""
+    party_dict = _party_to_sparse_dict(party)
+    return _write_toml(party_dict)
+
+
+def _party_to_sparse_dict(party: Party) -> dict[str, Any]:
+    data = dataclasses.asdict(party)
+    _remove_default_values(data)
+    return data
+
+
+# util
+
+
+def _write_toml(d: dict[str, Any]) -> str:
+    return tomlkit.dumps(d)
+
+
+def _remove_default_values(d: dict[str, Any]) -> dict[str, Any]:
+    """Remove `None` and `False`, values from first level of dictionary."""
+    for k, v in list(d.items()):
+        if (v is None) or (v is False):
+            del d[k]
+        elif isinstance(v, dict):
+            _remove_default_values(v)
+
+    return d