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101 lines
3.2 KiB
Python
101 lines
3.2 KiB
Python
"""Send Gmail messages."""
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import base64
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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from typing import Any, Dict, List, Optional, Union
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from pydantic import BaseModel, Field
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from langchain.callbacks.manager import (
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AsyncCallbackManagerForToolRun,
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CallbackManagerForToolRun,
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)
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from langchain.tools.gmail.base import GmailBaseTool
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class SendMessageSchema(BaseModel):
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message: str = Field(
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...,
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description="The message to send.",
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)
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to: Union[str, List[str]] = Field(
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...,
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description="The list of recipients.",
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)
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subject: str = Field(
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...,
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description="The subject of the message.",
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)
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cc: Optional[Union[str, List[str]]] = Field(
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None,
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description="The list of CC recipients.",
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)
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bcc: Optional[Union[str, List[str]]] = Field(
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None,
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description="The list of BCC recipients.",
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)
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class GmailSendMessage(GmailBaseTool):
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name: str = "send_gmail_message"
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description: str = (
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"Use this tool to send email messages." " The input is the message, recipents"
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)
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def _prepare_message(
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self,
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message: str,
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to: Union[str, List[str]],
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subject: str,
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cc: Optional[Union[str, List[str]]] = None,
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bcc: Optional[Union[str, List[str]]] = None,
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) -> Dict[str, Any]:
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"""Create a message for an email."""
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mime_message = MIMEMultipart()
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mime_message.attach(MIMEText(message, "html"))
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mime_message["To"] = ", ".join(to if isinstance(to, list) else [to])
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mime_message["Subject"] = subject
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if cc is not None:
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mime_message["Cc"] = ", ".join(cc if isinstance(cc, list) else [cc])
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if bcc is not None:
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mime_message["Bcc"] = ", ".join(bcc if isinstance(bcc, list) else [bcc])
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encoded_message = base64.urlsafe_b64encode(mime_message.as_bytes()).decode()
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return {"raw": encoded_message}
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def _run(
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self,
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message: str,
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to: Union[str, List[str]],
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subject: str,
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cc: Optional[Union[str, List[str]]] = None,
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bcc: Optional[Union[str, List[str]]] = None,
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run_manager: Optional[CallbackManagerForToolRun] = None,
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) -> str:
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"""Run the tool."""
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try:
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create_message = self._prepare_message(message, to, subject, cc=cc, bcc=bcc)
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send_message = (
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self.api_resource.users()
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.messages()
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.send(userId="me", body=create_message)
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)
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sent_message = send_message.execute()
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return f'Message sent. Message Id: {sent_message["id"]}'
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except Exception as error:
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raise Exception(f"An error occurred: {error}")
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async def _arun(
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self,
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message: str,
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to: Union[str, List[str]],
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subject: str,
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cc: Optional[Union[str, List[str]]] = None,
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bcc: Optional[Union[str, List[str]]] = None,
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run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
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) -> str:
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"""Run the tool asynchronously."""
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raise NotImplementedError(f"The tool {self.name} does not support async yet.")
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