mirror of
https://github.com/hwchase17/langchain
synced 2024-11-10 01:10:59 +00:00
46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
import datetime
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import json
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from pathlib import Path
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from typing import Iterator
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from langchain_core.documents import Document
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from langchain_community.document_loaders.base import BaseLoader
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def concatenate_rows(row: dict) -> str:
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"""Combine message information in a readable format ready to be used.
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Args:
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row: dictionary containing message information.
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"""
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sender = row["sender_name"]
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text = row["content"]
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date = datetime.datetime.fromtimestamp(row["timestamp_ms"] / 1000).strftime(
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"%Y-%m-%d %H:%M:%S"
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)
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return f"{sender} on {date}: {text}\n\n"
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class FacebookChatLoader(BaseLoader):
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"""Load `Facebook Chat` messages directory dump."""
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def __init__(self, path: str):
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"""Initialize with a path."""
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self.file_path = path
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def lazy_load(self) -> Iterator[Document]:
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p = Path(self.file_path)
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with open(p, encoding="utf8") as f:
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d = json.load(f)
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text = "".join(
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concatenate_rows(message)
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for message in d["messages"]
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if message.get("content") and isinstance(message["content"], str)
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)
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metadata = {"source": str(p)}
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yield Document(page_content=text, metadata=metadata)
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