subscriptions/tasks.py

@@ -8,6 +8,7 @@ from django.conf import settings
 from django.template import loader
 import django.core.mail
 
+from looper.pdf import PDFResponse
 from looper.stripe_utils import (
     create_active_subscription_from_payment_intent,
     upsert_subscription_payment_method_from_setup_intent,
@@ -27,6 +28,33 @@ logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
 
 
+def attach_invoice_pdf(msg: django.core.mail.EmailMultiAlternatives, order: looper.models.Order):
+    """Attach the PDF receipt file to a given email message."""
+    assert order.status == 'paid'
+    file_name = f'blender-studio-invoice-{order.display_number}.pdf'
+    pdf_context = {'order': order}
+    pdf_response = PDFResponse(None, 'looper/settings/receipt_pdf.html', context=pdf_context)
+    file_data = pdf_response.rendered_content
+    msg.attach(file_name, file_data, 'application/pdf')
+    logger.info('Attached invoice PDF of order pk=%s to email', order.pk)
+
+
+def _attach_latest_invoice_pdf(
+    msg: django.core.mail.EmailMultiAlternatives,
+    subscription: looper.models.Subscription,
+) -> None:
+    if subscription.status != 'active':
+        return
+    order = subscription.latest_order()
+    if not order:
+        logger.warning("Subscription pk=%s has no order, won't attach receipt", subscription.pk)
+        return
+    if order.status != 'paid':
+        logger.warning("Latest order pk=%s has is not paid, won't attach receipt", order.pk)
+        return
+    attach_invoice_pdf(msg, order)
+
+
 def _construct_subscription_mail(mail_name: str, context: Dict[str, Any]) -> Tuple[str, str, str]:
     """Construct a mail about a subscription.
 
@@ -116,6 +144,7 @@ def send_mail_subscription_status_changed(subscription_id: int):
         verb = 'activated'
     else:
         verb = 'deactivated'
+    logger.info('Sending subscription-%s notification to %s', verb, email)
 
     context = {
         'user': user,
@@ -126,15 +155,20 @@ def send_mail_subscription_status_changed(subscription_id: int):
     mail_name = f'subscription_{verb}'
     email_body_html, email_body_txt, subject = _construct_subscription_mail(mail_name, context)
 
-    django.core.mail.send_mail(
+    msg = django.core.mail.EmailMultiAlternatives(
-        subject,
+        subject=subject,
-        message=email_body_txt,
+        body=email_body_txt,
-        html_message=email_body_html,
         from_email=None,  # just use the configured default From-address.
-        recipient_list=[email],
+        to=[email],
-        fail_silently=False,
     )
-    logger.info('Sent subscription-changed notification to %s', email)
+    msg.attach_alternative(email_body_html, 'text/html')
+
+    # If subscription was activated, include invoice PDF of the latest paid order
+    if verb == 'activated':
+        _attach_latest_invoice_pdf(msg, subscription)
+
+    msg.send(fail_silently=False)
+    logger.info('Sent subscription-%s notification to %s', verb, email)
 
 
 @background()
@@ -172,14 +206,18 @@ def send_mail_automatic_payment_performed(order_id: int, transaction_id: int):
     mail_name = f'payment_{order.status}'
     email_body_html, email_body_txt, subject = _construct_subscription_mail(mail_name, context)
 
-    django.core.mail.send_mail(
+    msg = django.core.mail.EmailMultiAlternatives(
-        subject,
+        subject=subject,
-        message=email_body_txt,
+        body=email_body_txt,
-        html_message=email_body_html,
         from_email=None,  # just use the configured default From-address.
-        recipient_list=[email],
+        to=[email],
-        fail_silently=False,
     )
+    msg.attach_alternative(email_body_html, 'text/html')
+
+    if order.status == 'paid':
+        attach_invoice_pdf(msg, order)
+
+    msg.send(fail_silently=False)
     logger.info('Sent %r notification to %s', order.status, email)