🎉 First commit!

matrix_bot_invitation_mailer/__main__.py

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+import simplematrixbotlib as botlib
+import requests
+import os
+import logging
+import smtplib
+import datetime
+from email.mime.text import MIMEText
+from dotenv import load_dotenv
+
+
+load_dotenv()
+
+creds = botlib.Creds(
+    os.getenv("BOT_HOMESERVER"),
+    os.getenv("BOT_USERNAME"),
+    os.getenv("BOT_PASSWORD"),
+    session_stored_file="data/session.txt"
+)
+
+bot = botlib.Bot(creds)
+PREFIX = '!'
+
+
+logging.basicConfig(level=logging.INFO)
+
+
+@bot.listener.on_message_event
+async def echo(room, message) -> None:
+    match = botlib.MessageMatch(room, message, bot, PREFIX)
+
+    if match.is_not_from_this_bot() and match.prefix() and match.command("echo"):
+
+        await bot.api.send_text_message(
+            room.room_id, " ".join(arg for arg in match.args())
+        )
+
+
+@bot.listener.on_message_event
+async def usage(room, message) -> None:
+    match = botlib.MessageMatch(room, message, bot, PREFIX)
+
+    response = """usage:
+- **!invite** <johndoe@example.org> - sends e-mail with invitation link to given mail address
+- **everything else** - prints this help
+    """
+
+    if match.is_not_from_this_bot() and not match.prefix() and room.room_id:
+        await bot.api.send_markdown_message(room.room_id, response)
+
+
+@bot.listener.on_message_event
+async def invite(room, message) -> None:
+    match = botlib.MessageMatch(room, message, bot, PREFIX)
+
+    if match.is_not_from_this_bot() and match.prefix() and match.command("invite"):
+        logging.info("preparing invite")
+        # TODO: add validation
+        mail_address = " ".join(arg for arg in match.args())
+
+        send_invitation_mail(mail_address)
+        response = "mail sent"
+        await bot.api.send_text_message(room.room_id, response)
+
+
+def send_invitation_mail(receiver_email):
+    logging.info("sending email...")
+
+    # make reqest to obtain registration token
+    headers = {
+        'Content-Type': "application/json",
+        'Authorization': "SharedSecret {}".format(os.getenv("REGISTRATION_API_SHARED_SECRET"))
+    }
+    payload = {
+        "max-usage": "1",
+        "expiration_date": (datetime.date.today() + datetime.timedelta(days=7)).strftime("%Y-%m-%d")
+    }
+    response = requests.post(os.getenv("REGISTRATION_API_URL"), headers=headers, json=payload)
+    logging.info(response.text)
+    logging.info(response.json())
+    sender_email = os.getenv("MAIL_FROM_ADDRESS")
+
+    body = """Hello,
+
+you have been invited to the f2n.me matrix homeserver!
+
+Click the following link and create your account:
+
+{}
+
+The link will be valid for 7 days.""".format(os.getenv("REGISTRATION_URL") + response.json()["name"])
+    msg = MIMEText(body, 'plain')
+    msg['From'] = sender_email
+    msg['To'] = receiver_email
+    msg['Subject'] = "Your matrix homeserver invitation link"
+
+    try:
+        # Connect to the SMTP server
+        server = smtplib.SMTP(os.getenv("SMTP_HOSTNAME"), os.getenv("SMTP_PORT"))
+        server.starttls()  # Secure the connection
+        server.login(os.getenv("SMTP_USERNAME"), os.getenv("SMTP_PASSWORD"))  # Login to the server
+
+        # Send the email
+        server.sendmail(sender_email, receiver_email, msg.as_string())
+
+        print("Email sent successfully")
+    except Exception as e:
+        print(f"Error: {e}")
+    finally:
+        # Close the connection
+        server.quit()    
+
+
+bot.run()