email.py

from flask import current_app, render_template
from flask_mail import Message
from . import mail
from .decorators import background


def create_message(recipient, subject, template, **kwargs):
    msg = Message('{} {}'.format(current_app.config['NOPAQUE_MAIL_SUBJECT_PREFIX'], subject), recipients=[recipient])  # noqa
    msg.body = render_template('{}.txt.j2'.format(template), **kwargs)
    msg.html = render_template('{}.html.j2'.format(template), **kwargs)
    return msg


@background
def send(msg, *args, **kwargs):
    with kwargs['app'].app_context():
        mail.send(msg)