from typing import List


class LanguageDetector:
    SUPPORTED_EXTENSIONS = {
        "py": "python",
        "js": "javascript",
        "ts": "typescript",
        "rs": "rust",
        "go": "go",
        "java": "java",
        "cpp": "cpp",
        "c": "c",
        "rb": "ruby",
        "php": "php",
    }

    def is_supported(self, extension: str) -> bool:
        return extension in self.SUPPORTED_EXTENSIONS

    def get_language(self, extension: str) -> Optional[str]:
        return self.SUPPORTED_EXTENSIONS.get(extension)

    def get_supported_extensions(self) -> List[str]:
        return list(self.SUPPORTED_EXTENSIONS.keys())