Source code for langchain.document_loaders.parsers.language.javascript
from typing import Any, List
from langchain.document_loaders.parsers.language.code_segmenter import CodeSegmenter
[docs]class JavaScriptSegmenter(CodeSegmenter):
    """Code segmenter for JavaScript."""
[docs]    def __init__(self, code: str):
        super().__init__(code)
        self.source_lines = self.code.splitlines()
        try:
            import esprima  # noqa: F401
        except ImportError:
            raise ImportError(
                "Could not import esprima Python package. "
                "Please install it with `pip install esprima`."
            )
[docs]    def is_valid(self) -> bool:
        import esprima
        try:
            esprima.parseScript(self.code)
            return True
        except esprima.Error:
            return False
    def _extract_code(self, node: Any) -> str:
        start = node.loc.start.line - 1
        end = node.loc.end.line
        return "\n".join(self.source_lines[start:end])
[docs]    def extract_functions_classes(self) -> List[str]:
        import esprima
        tree = esprima.parseScript(self.code, loc=True)
        functions_classes = []
        for node in tree.body:
            if isinstance(
                node,
                (esprima.nodes.FunctionDeclaration, esprima.nodes.ClassDeclaration),
            ):
                functions_classes.append(self._extract_code(node))
        return functions_classes
[docs]    def simplify_code(self) -> str:
        import esprima
        tree = esprima.parseScript(self.code, loc=True)
        simplified_lines = self.source_lines[:]
        for node in tree.body:
            if isinstance(
                node,