from towhee.operator import PyOperator
from typing import List
from langchain.text_splitter import RecursiveCharacterTextSplitter


class TextSpliter(PyOperator):
    '''Split data into a list.'''
    def __init__(self, chunk_size: int = 300):
        self.splitter = RecursiveCharacterTextSplitter(chunk_size=chunk_size)

    def __call__(self, data: str) -> List[str]:
        texts = self.splitter.create_documents([data])
        docs = self.splitter.split_documents(texts)
        return [str(doc.page_content) for doc in docs]