add a smtp function

apps/pushnotification/constants.py

@@ -0,0 +1,7 @@
+from ...secret import MAILER_PW
+
+port = 465  # For starttls
+smtp_server = "smtp.gmail.com"
+sender_email = "[email protected]"
+subject = "Message from Ticketmaster Ticket Tracker"
+app_password = MAILER_PW

apps/pushnotification/smtp.py

@@ -0,0 +1,41 @@
+from smtplib import SMTP_SSL
+from ssl import create_default_context
+from email.message import EmailMessage
+from . import constants
+
+
+def init_server():
+    context = create_default_context()
+    server = SMTP_SSL(constants.smtp_server, constants.port, context=context)
+    return server
+
+
+def server_login(server: SMTP_SSL, password: str):
+    return server.login(constants.sender_email, password)
+
+
+def auth_server(server: SMTP_SSL):
+    server_login(server, constants.app_password)
+
+
+server = init_server()
+# auth_server(server)
+
+
+def server_send_email(server: SMTP_SSL, receiver_emails: list[str], message: str):
+    em = EmailMessage()
+    em['From'] = constants.sender_email
+    em['To'] = receiver_emails
+    em['subject'] = constants.subject
+
+    em.set_content(message)
+    return server.sendmail(constants.sender_email, receiver_emails, em.as_string())
+
+
+def send_email(receiver_emails: list[str], message: str):
+    try:
+        err = server_send_email(server, receiver_emails, message)
+        if err is not None:
+            raise Exception('could not send email to the receiver')
+    except Exception as ex:
+        print(ex)

secret.py

@@ -1,3 +1,4 @@
 import os
 
-CONN_SRV = os.environ.get('CONN_SRV')
+CONN_SRV = os.environ.get('CONN_SRV')
+MAILER_PW = os.environ.get('MAILER_PW', '')