revert confirmation email sending code

hiss/shared/admin_functions.py

@@ -1,46 +1,77 @@
-from django.core.mail import get_connection, EmailMultiAlternatives
-import threading
-
-#create separate Threading class for mass emails
-class MassEmailThread(threading.Thread):
-    def __init__(self, subject, text_content, html_content, from_email, recipient_list, connection):
-        threading.Thread.__init__(self)
-        self.subject = subject
-        self.text_content = text_content
-        self.html_content = html_content
-        self.from_email = from_email
-        self.recipient_list = recipient_list
-        self.connection = connection
-        self.result = 0  
-
-    def run(self):
-        email = EmailMultiAlternatives(self.subject, self.text_content, self.from_email, self.recipient_list)
-        email.attach_alternative(self.html_content, "text/html")
-        try:
-            self.result = email.send(fail_silently=False, connection=self.connection)
-        except Exception as e:
-            print("Error sending email: ", e)
-            self.result = 0
-
-def send_mass_html_mail(datatuple, fail_silently=False, user=None, password=None, connection=None):
+
+import json
+from io import BytesIO
+
+import pyqrcode
+from django.conf import settings
+from django.core import mail
+from django.template.loader import render_to_string
+from django.utils import html
+
+from application.models import Application
+from application.apple_wallet import get_apple_wallet_pass_url
+
+def send_creation_email(app: Application) -> None:
     """
-    Sends each message in datatuple (subject, text_content, html_content, from_email, recipient_list).
-    Returns the number of emails sent.
+    Sends an email to the user informing them of their newly-created app.
+    :param app: The user's newly-created application
+    :return: None
     """
-    connection = connection or get_connection(
-        username=user, password=password, fail_silently=fail_silently
-    )
+    subject = f"We've received your application for {settings.EVENT_NAME}!"
+    template_name = "application/emails/created.html"
+    context = {
+        "first_name": app.first_name,
+        "event_name": settings.EVENT_NAME,
+        "organizer_name": settings.ORGANIZER_NAME,
+        "event_year": settings.EVENT_YEAR,
+        "organizer_email": settings.ORGANIZER_EMAIL,
+    }
+    app.user.send_html_email(template_name, context, subject)
 
-    threads = []
+def send_confirmation_email(app: Application) -> None:
+    """
+    Sends a confirmation email to a user, which contains their QR code as well as additional event information.
+    :param app: The user's application
+    :type app: Application
+    :return: None
+    """
+    subject = f"HowdyHack: Important Day-of Information!"
+    email_template = "application/emails/confirmed.html"
 
-    for subject, text, html, from_email, recipient in datatuple:
-        email_thread = MassEmailThread(subject, text, html, from_email, recipient, connection)
-        email_thread.start()
-        threads.append(email_thread)
+    if app.status == "E":
+        subject = f"HowdyHack Waitlist: Important Day-of Information!"
+        email_template = "application/emails/confirmed-waitlist.html"
 
-    for thread in threads:
-        thread.join()
+    context = {
+        "first_name": app.first_name,
+        "event_name": settings.EVENT_NAME,
+        "organizer_name": settings.ORGANIZER_NAME,
+        "event_year": settings.EVENT_YEAR,
+        "organizer_email": settings.ORGANIZER_EMAIL,
+        "apple_wallet_url": get_apple_wallet_pass_url(app.user.email),
+        "meal_group": app.meal_group,
+    }
 
-    total_sent = sum(thread.result for thread in threads if thread.result)
+    html_msg = render_to_string(email_template, context)
+    msg = html.strip_tags(html_msg)
+    email = mail.EmailMultiAlternatives(
+        subject, msg, from_email=None, to=[app.user.email]
+    )
+
+    email.attach_alternative(html_msg, "text/html")
+    qr_content = json.dumps(
+        {
+            "first_name": app.first_name,
+            "last_name": app.last_name,
+            "email": app.user.email,
+            "university": app.school.name,
+        }
+    )
 
-    return total_sent
+    qr_code = pyqrcode.create(qr_content)
+    qr_stream = BytesIO()
+    qr_code.png(qr_stream, scale=5)
+    email.attach("code.png", qr_stream.getvalue(), "text/png")
+
+    print(f"sending confirmation email to {app.user.email}")
+    email.send()