Add source code files

config_converter/converters/yaml_converter.py

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+"""YAML format converter."""
+
+from pathlib import Path
+from typing import Any, Dict
+
+import yaml
+
+from config_converter.converters.base import BaseConverter, ConversionError
+
+
+class YamlConverter(BaseConverter):
+    """Converter for YAML configuration files."""
+
+    FORMAT_NAME = "yaml"
+    FILE_EXTENSIONS = ["yaml", "yml"]
+
+    def read(self, source: str | Path) -> Dict[str, Any]:
+        """Read and parse a YAML configuration file."""
+        try:
+            with open(source, "r", encoding="utf-8") as f:
+                return yaml.safe_load(f) or {}
+        except yaml.YAMLError as e:
+            raise ConversionError(f"Invalid YAML 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 YAML file."""
+        try:
+            with open(target, "w", encoding="utf-8") as f:
+                yaml.dump(data, f, default_flow_style=False, allow_unicode=True, sort_keys=False)
+        except (OSError, TypeError) as e:
+            raise ConversionError(f"Failed to write YAML to {target}: {e}") from e
+
+    def parse(self, content: str) -> Dict[str, Any]:
+        """Parse YAML content from a string."""
+        try:
+            return yaml.safe_load(content) or {}
+        except yaml.YAMLError as e:
+            raise ConversionError(f"Invalid YAML content: {e}") from e
+
+    def format(self, data: Dict[str, Any]) -> str:
+        """Format configuration data to a YAML string."""
+        try:
+            return yaml.dump(data, default_flow_style=False, allow_unicode=True, sort_keys=False)
+        except (TypeError, ValueError) as e:
+            raise ConversionError(f"Failed to format data as YAML: {e}") from e