release: publish saldo 0.1.0

app/services/push_service.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from pywebpush import WebPushException, webpush
+
+from app.models import PushSubscription
+
+
+class PushService:
+    def __init__(self, public_key: str, private_key: str, claims: dict):
+        self.public_key = public_key
+        self.private_key = private_key
+        self.claims = claims
+
+    def send_to_user(self, user, title: str, body: str, url: str = "/") -> int:
+        if not self.public_key or not self.private_key:
+            return 0
+        sent = 0
+        for sub in user.push_subscriptions:
+            try:
+                webpush(
+                    subscription_info={
+                        "endpoint": sub.endpoint,
+                        "keys": {"p256dh": sub.p256dh_key, "auth": sub.auth_key},
+                    },
+                    data=f'{{"title":"{title}","body":"{body}","url":"{url}"}}',
+                    vapid_private_key=self.private_key,
+                    vapid_claims=self.claims,
+                )
+                sent += 1
+            except WebPushException:
+                continue
+        return sent