Source code for langchain_community.document_loaders.whatsapp_chat

import re
from pathlib import Path
from typing import Iterator

from langchain_core.documents import Document

from langchain_community.document_loaders.base import BaseLoader

[docs]def concatenate_rows(date: str, sender: str, text: str) -> str: """Combine message information in a readable format ready to be used.""" return f"{sender} on {date}: {text}\n\n"
[docs]class WhatsAppChatLoader(BaseLoader): """Load `WhatsApp` messages text file."""
[docs] def __init__(self, path: str): """Initialize with path.""" self.file_path = path
[docs] def lazy_load(self) -> Iterator[Document]: p = Path(self.file_path) text_content = "" with open(p, encoding="utf8") as f: lines = f.readlines() message_line_regex = r""" \[? ( \d{1,4} [\/.] \d{1,2} [\/.] \d{1,4} ,\s \d{1,2} :\d{2} (?: :\d{2} )? (?:[\s_](?:AM|PM))? ) \]? [\s-]* ([~\w\s]+) [:]+ \s (.+) """ ignore_lines = ["This message was deleted", "<Media omitted>"] for line in lines: result = re.match( message_line_regex, line.strip(), flags=re.VERBOSE | re.IGNORECASE ) if result: date, sender, text = result.groups() if text not in ignore_lines: text_content += concatenate_rows(date, sender, text) metadata = {"source": str(p)} yield Document(page_content=text_content, metadata=metadata)