added class to write mails to users

config.toml.example

@@ -17,6 +17,14 @@ shutdown_contact_screen_name = 'links_tech'
 access_token_key = "876046057721008128-J35moxFXUvLb24MnaMVbVpqiEtxBlcc" 
 access_token_secret = "I7PQZMHuJDS5WslgUhqEeZbEWGhwLhmOetvwFoTn8YDKW" 
 
+[mail]
+mailserver = "smtp.riseup.net"
+port = 587
+user = "ticketfrei"
+passphrase = "sup3rs3cur3"
+
+
+
 # [trigger]
 # goodlists are one regex per line.
 # badlists are one badword per line.

sendmail.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+import smtplib
+import pytoml as toml
+from email.mime.text import MIMEText
+
+
+class Mailer(object):
+    """
+    Maintains the connection to the mailserver and sends text to users.
+    """
+
+    def __init__(self, config):
+        """
+
+        :param config: The config file generated from config.toml
+        """
+        # This generates the From address by stripping the part until the first
+        # period from the mail server address and won't work always.
+        self.fromaddr = config["mail"]["user"] + "@" + \
+                        config["mail"]["mailserver"].partition(".")[2]
+
+        # starts a client session with the SMTP server
+        self.s = smtplib.SMTP(config["mail"]["mailserver"])
+        self.s.starttls()
+        self.s.login(config["mail"]["user"], config["mail"]["passphrase"])
+
+    def send(self, text, recipient, subject):
+        """
+
+        :param text: (string) the content of the mail
+        :param recipient: (string) the recipient of the mail
+        :param subject: (string) the subject of the mail
+        :return: string for logging purposes, contains recipient & subject
+        """
+        msg = MIMEText(text)
+
+        msg["From"] = self.fromaddr
+        msg["To"] = recipient
+        msg["Subject"] = subject
+
+        self.s.send_message(msg)
+
+        return "Sent mail to " + recipient + ": " + subject
+
+# For testing:
+if __name__ == '__main__':
+    # read config in TOML format (https://github.com/toml-lang/toml#toml)
+    with open('config.toml') as configfile:
+        config = toml.load(configfile)
+
+        m = Mailer(config)
+        print(m.send("This is a test mail.", m.fromaddr, "Test"))