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72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
"""Loader that loads email files."""
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import os
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from typing import List
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from langchain.docstore.document import Document
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from langchain.document_loaders.base import BaseLoader
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from langchain.document_loaders.unstructured import (
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UnstructuredFileLoader,
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satisfies_min_unstructured_version,
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)
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class UnstructuredEmailLoader(UnstructuredFileLoader):
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"""Loader that uses unstructured to load email files."""
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def _get_elements(self) -> List:
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from unstructured.file_utils.filetype import FileType, detect_filetype
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filetype = detect_filetype(self.file_path)
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if filetype == FileType.EML:
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from unstructured.partition.email import partition_email
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return partition_email(filename=self.file_path)
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elif satisfies_min_unstructured_version("0.5.8") and filetype == FileType.MSG:
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from unstructured.partition.msg import partition_msg
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return partition_msg(filename=self.file_path)
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else:
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raise ValueError(
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f"Filetype {filetype} is not supported in UnstructuredEmailLoader."
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)
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class OutlookMessageLoader(BaseLoader):
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"""
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Loader that loads Outlook Message files using extract_msg.
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https://github.com/TeamMsgExtractor/msg-extractor
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"""
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def __init__(self, file_path: str):
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"""Initialize with file path."""
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self.file_path = file_path
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if not os.path.isfile(self.file_path):
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raise ValueError("File path %s is not a valid file" % self.file_path)
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try:
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import extract_msg # noqa:F401
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except ImportError:
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raise ImportError(
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"extract_msg is not installed. Please install it with "
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"`pip install extract_msg`"
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)
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def load(self) -> List[Document]:
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"""Load data into document objects."""
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import extract_msg
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msg = extract_msg.Message(self.file_path)
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return [
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Document(
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page_content=msg.body,
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metadata={
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"subject": msg.subject,
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"sender": msg.sender,
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"date": msg.date,
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},
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)
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]
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