Added support for attachments.

#!/usr/bin/env python

import mimetypes

import smtplib

from config import Config

from email.message import EmailMessage

from email.policy import SMTP

from smtplib import SMTPException

class Mailer(object):

        self.smtpServer = params["smtp_server"]

        self.smtpPort = params.getint("smtp_port")

        self.sender = params["no_reply_email"]

        self.receivers = []

        self.recipients = []

        self.message = None

    def sender(self, sender):

        """Set mail sender."""

        self.sender = sender

    def addReceiver(self, receiver):

        self.receivers.append(receiver)

    def addRecipient(self, recipient):

        """Add recipient to recipients list."""

        self.recipients.append(recipient)

    def setMessage(self, msg):

        self.message = msg

    def setMessage(self, subject, msg):

        """Set a basic message."""

        self.message = EmailMessage()

        self.message["From"] = self.sender

        self.message["Subject"] = subject

        self.message["To"] = ", ".join(self.recipients)

        self.message.set_content(msg)

    def setMessageWithAttachment(self, subject, msg, filePath):

        """Set a message with attachment."""

        self.setMessage(subject, msg)

        ctype, encoding = mimetypes.guess_type(filePath)

        if ctype is None or encoding is not None:

            ctype = "application/octet-stream"

        maintype, subtype = ctype.split('/', 1)

        with open(filePath, "rb") as fp:

            self.message.add_attachment(fp.read(),

                                        maintype = maintype,

                                        subtype = subtype,

                                        filename = filePath)

    def send(self):

        """Send email message."""

        try:

            smtpObj = smtplib.SMTP(self.smtpServer, self.smtpPort)

            smtpObj.sendmail(self.sender, self.receivers, self.message)

            smtpObj.send_message(self.message)

            print("Message sent!")

        except SMTPException:

            print("Error: cannot send email message.")

# Test

#m = Mailer()

#m.setMessage("Hello world!")

#m.addReceiver("cristiano.urban@inaf.it")

#m.send()

# Test 1

#m1 = Mailer()

#m1.addRecipient("cristiano.urban@inaf.it")

#m1.setMessage("Hello", "Hello world!")

#m1.send()

# Test 2

#m2 = Mailer()

#m2.addRecipient("cristiano.urban@inaf.it")

#m2.addRecipient("cristiano.urban.slack@gmail.com")

#m2.setMessageWithAttachment("Hello", "Hello world!", "config.py")

#m2.send()