release nouri 0.5.0 shopping rhythm pwa and reminders

nouri/push.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+import json
+from typing import Any
+
+from flask import current_app
+
+
+def push_is_configured() -> bool:
+    return bool(
+        current_app.config.get("VAPID_PUBLIC_KEY")
+        and current_app.config.get("VAPID_PRIVATE_KEY")
+        and current_app.config.get("VAPID_SUBJECT")
+    )
+
+
+def push_public_key() -> str | None:
+    return current_app.config.get("VAPID_PUBLIC_KEY") or None
+
+
+def send_push_message(subscription: dict[str, Any], *, title: str, body: str, url: str) -> tuple[bool, str | None]:
+    if not push_is_configured():
+        return False, "Push ist noch nicht konfiguriert."
+
+    try:
+        from pywebpush import WebPushException, webpush
+    except Exception:
+        return False, "Die Push-Bibliothek ist noch nicht installiert."
+
+    payload = json.dumps(
+        {
+            "title": title,
+            "body": body,
+            "url": url,
+            "icon": "/static/brand/pwa-192.png",
+            "badge": "/static/brand/pwa-badge.png",
+        }
+    )
+
+    try:
+        webpush(
+            subscription_info=subscription,
+            data=payload,
+            vapid_private_key=current_app.config["VAPID_PRIVATE_KEY"],
+            vapid_claims={"sub": current_app.config["VAPID_SUBJECT"]},
+        )
+    except WebPushException as exc:  # pragma: no cover - depends on live push endpoint
+        return False, str(exc)
+
+    return True, None