mirror of
https://github.com/hwchase17/langchain
synced 2024-11-10 01:10:59 +00:00
25fbe356b4
This PR upgrades community to a recent version of mypy. It inserts type: ignore on all existing failures.
86 lines
3.1 KiB
Python
86 lines
3.1 KiB
Python
import json
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import logging
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import re
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import zipfile
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from pathlib import Path
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from typing import Dict, Iterator, List, Union
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from langchain_core.chat_loaders import BaseChatLoader
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from langchain_core.chat_sessions import ChatSession
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from langchain_core.messages import AIMessage, HumanMessage
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logger = logging.getLogger(__name__)
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class SlackChatLoader(BaseChatLoader):
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"""Load `Slack` conversations from a dump zip file."""
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def __init__(
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self,
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path: Union[str, Path],
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):
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"""
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Initialize the chat loader with the path to the exported Slack dump zip file.
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:param path: Path to the exported Slack dump zip file.
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"""
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self.zip_path = path if isinstance(path, Path) else Path(path)
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if not self.zip_path.exists():
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raise FileNotFoundError(f"File {self.zip_path} not found")
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def _load_single_chat_session(self, messages: List[Dict]) -> ChatSession:
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results: List[Union[AIMessage, HumanMessage]] = []
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previous_sender = None
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for message in messages:
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if not isinstance(message, dict):
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continue
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text = message.get("text", "")
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timestamp = message.get("ts", "")
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sender = message.get("user", "")
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if not sender:
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continue
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skip_pattern = re.compile(
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r"<@U\d+> has joined the channel", flags=re.IGNORECASE
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)
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if skip_pattern.match(text):
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continue
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if sender == previous_sender:
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results[-1].content += "\n\n" + text
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results[-1].additional_kwargs["events"].append(
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{"message_time": timestamp}
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)
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else:
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results.append(
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HumanMessage( # type: ignore[call-arg]
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role=sender,
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content=text,
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additional_kwargs={
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"sender": sender,
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"events": [{"message_time": timestamp}],
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},
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)
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)
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previous_sender = sender
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return ChatSession(messages=results)
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def _read_json(self, zip_file: zipfile.ZipFile, file_path: str) -> List[dict]:
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"""Read JSON data from a zip subfile."""
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with zip_file.open(file_path, "r") as f:
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data = json.load(f)
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if not isinstance(data, list):
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raise ValueError(f"Expected list of dictionaries, got {type(data)}")
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return data
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def lazy_load(self) -> Iterator[ChatSession]:
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"""
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Lazy load the chat sessions from the Slack dump file and yield them
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in the required format.
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:return: Iterator of chat sessions containing messages.
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"""
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with zipfile.ZipFile(str(self.zip_path), "r") as zip_file:
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for file_path in zip_file.namelist():
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if file_path.endswith(".json"):
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messages = self._read_json(zip_file, file_path)
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yield self._load_single_chat_session(messages)
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