Add source code files

config_converter/converters/toml_converter.py

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+"""TOML format converter."""
+
+from pathlib import Path
+from typing import Any, Dict
+
+import tomlkit
+from tomlkit import TOMLDocument
+
+from config_converter.converters.base import BaseConverter, ConversionError
+
+
+class TomlConverter(BaseConverter):
+    """Converter for TOML configuration files."""
+
+    FORMAT_NAME = "toml"
+    FILE_EXTENSIONS = ["toml"]
+
+    def read(self, source: str | Path) -> Dict[str, Any]:
+        """Read and parse a TOML configuration file."""
+        try:
+            with open(source, "r", encoding="utf-8") as f:
+                return tomlkit.parse(f.read())
+        except tomlkit.exceptions.ParseError as e:
+            raise ConversionError(f"Invalid TOML in {source}: {e}") from e
+        except FileNotFoundError as e:
+            raise ConversionError(f"File not found: {source}") from e
+        except PermissionError as e:
+            raise ConversionError(f"Permission denied: {source}") from e
+
+    def write(self, data: Dict[str, Any], target: str | Path) -> None:
+        """Write configuration data to a TOML file."""
+        try:
+            doc: TOMLDocument = tomlkit.document()
+            for key, value in data.items():
+                doc[key] = value
+            with open(target, "w", encoding="utf-8") as f:
+                f.write(tomlkit.dumps(doc))
+        except (OSError, TypeError, tomlkit.exceptions.TypeError) as e:
+            raise ConversionError(f"Failed to write TOML to {target}: {e}") from e
+
+    def parse(self, content: str) -> Dict[str, Any]:
+        """Parse TOML content from a string."""
+        try:
+            return tomlkit.parse(content)
+        except tomlkit.exceptions.ParseError as e:
+            raise ConversionError(f"Invalid TOML content: {e}") from e
+
+    def format(self, data: Dict[str, Any]) -> str:
+        """Format configuration data to a TOML string."""
+        try:
+            doc: TOMLDocument = tomlkit.document()
+            for key, value in data.items():
+                doc[key] = value
+            return tomlkit.dumps(doc)
+        except (TypeError, ValueError, tomlkit.exceptions.TypeError) as e:
+            raise ConversionError(f"Failed to format data as TOML: {e}") from e