server: Send customer email on subscription.revoked

server/polar/subscription/email_templates/revoked.html

@@ -0,0 +1,31 @@
+{% extends "base.html" %}
+
+{% block body %}
+<h1>Your subscription has now ended</h1>
+<p>Thank you being a subscriber of <strong>{{ product.name }}</strong>.</p>
+<p>We hope to see you again in the future - you're always welcome back.</p>
+
+<table class="body-action" align="center" width="100%" cellpadding="0" cellspacing="0" role="presentation">
+    <tr>
+        <td align="center">
+            <table width="100%" border="0" cellspacing="0" cellpadding="0" role="presentation">
+                <tr>
+                    <td align="center">
+                        <a href="{{ url | safe }}" class="f-fallback button">View subscription</a>
+                    </td>
+                </tr>
+            </table>
+        </td>
+    </tr>
+</table>
+
+<!-- Sub copy -->
+<table class="body-sub" role="presentation">
+    <tr>
+        <td>
+            <p class="f-fallback sub">If you're having trouble with the button above, copy and paste the URL below into your web browser:</p>
+            <p class="f-fallback sub"><a href="{{ url | safe }}">{{ url | safe }}</a></p>
+        </td>
+    </tr>
+</table>
+{% endblock %}

server/polar/subscription/service.py

@@ -715,6 +715,7 @@ async def _after_subscription_revoked(
         await self._send_webhook(
             session, subscription, WebhookEventType.subscription_revoked
         )
+        await self.send_revoked_email(session, subscription)
         await eventstream.publish_subscription_revoked_event(subscription)
 
     async def _send_new_subscription_notification(
@@ -814,6 +815,14 @@ async def send_cancellation_email(
             template_path="subscription/cancellation.html",
         )
 
+    async def send_revoked_email(
+        self, session: AsyncSession, subscription: Subscription
+    ) -> None:
+        return await self._send_customer_email(
+            session,
+            subscription,
+            subject_template="Your {{ product.name }} subscription has ended",
+            template_path="subscription/revoked.html",
         )
 
     async def _send_customer_email(