notify admin when user cancels

app/models.py

@@ -1207,6 +1207,8 @@ class EmailLog(db.Model, ModelMixin):
 
 
 class Subscription(db.Model, ModelMixin):
+    """Paddle subscription"""
+
     # Come from Paddle
     cancel_url = db.Column(db.String(1024), nullable=False)
     update_url = db.Column(db.String(1024), nullable=False)
@@ -1230,6 +1232,9 @@ class Subscription(db.Model, ModelMixin):
         else:
             return "Yearly ($29.99/year)"
 
+    def __repr__(self):
+        return f"<Subscription {self.plan} {self.next_bill_date}>"
+
 
 class ManualSubscription(db.Model, ModelMixin):
     """

server.py

@@ -41,10 +41,12 @@ from app.config import (
     SENTRY_FRONT_END_DSN,
     FIRST_ALIAS_DOMAIN,
     SESSION_COOKIE_NAME,
+    ADMIN_EMAIL,
 )
 from app.dashboard.base import dashboard_bp
 from app.developer.base import developer_bp
 from app.discover.base import discover_bp
+from app.email_utils import send_email
 from app.extensions import db, login_manager, migrate, limiter
 from app.jose_utils import get_jwk_key
 from app.log import LOG
@@ -545,6 +547,12 @@ def setup_paddle_callback(app: Flask):
 
                 sub.cancelled = True
                 db.session.commit()
+
+                send_email(
+                    ADMIN_EMAIL,
+                    subject=f"{sub.user} cancels",
+                    plaintext=f"{sub} {request.form.get('cancellation_effective_date')}",
+                )
             else:
                 return "No such subscription", 400
         elif request.form.get("alert_name") == "subscription_updated":