from typing import Dict, List

from zope.interface import Interface

from .IUser import IUser


class IMailService(Interface):
    """An interface to send email messages."""

    def send(_from: str, to: str, headers: Dict[str, str], content: str):
        """Send a message with the given headers and content."""

    def send_welcome_message_to(user: IUser, password: str):
        """
        Send a welcome message to the new member, including their temporary
        password.
        """

    def announce_new_user(user: IUser, operations: List[str]):
        """
        Announce to the ceo mailing list that the new user was created.
        `operations` is a list of the operations which were performed
        during the transaction.
        """