[FEAT] Push notification integration into core (#1393)

* push notification integration into core

added missing component

fixed bell working on all pages
- made pubkey global template env var
- had to move `get_push_notification_pubkey` to `helpers.py` because of circular reference with `tasks.py`

formay

trying to fix mypy

added py-vapid to requirements

Trying to fix stub mypy issue

* removed key files

* webpush key pair is saved in db `webpush_settings`

* removed lnaddress extension changes

* support for multi user account subscriptions, subscriptions are stored user based

fixed syntax error

fixed syntax error

removed unused line

* fixed subscribed user storage with local storage, no get request required

* method is singular now

* cleanup unsubscribed or expired push subscriptions

fixed flake8 errors

fixed poetry errors

* updating to latest lnbits

formatting, rebase error

fix

* remove unused?

* revert

* relock

* remove

* do not create settings table use adminsettings

mypy

fix

* cleanup old code

* catch case when client tries to recreate existing webpush subscription e.g. on cleared local storage

* show notification bell on user related pages only

* use local storage with one key like array, some refactoring

* fixed crud import

* fixed too long line

* removed unused imports

* ruff

* make webpush editable

* fixed privkey encoding

* fix ruff

* fix migration

---------

Co-authored-by: schneimi <admin@schneimi.de>
Co-authored-by: schneimi <dev@schneimi.de>
Co-authored-by: dni ⚡ <office@dnilabs.com>

lnbits/core/tasks.py

@@ -10,10 +10,15 @@ from lnbits.tasks import (
     create_permanent_task,
     create_task,
     register_invoice_listener,
+    send_push_notification,
 )
 
 from . import db
-from .crud import get_balance_notify, get_wallet
+from .crud import (
+    get_balance_notify,
+    get_wallet,
+    get_webpush_subscriptions_for_user,
+)
 from .models import Payment
 from .services import get_balance_delta, send_payment_notification, switch_to_voidwallet
 
@@ -119,6 +124,8 @@ async def wait_for_paid_invoices(invoice_paid_queue: asyncio.Queue):
                 except (httpx.ConnectError, httpx.RequestError):
                     pass
 
+        await send_payment_push_notification(payment)
+
 
 async def dispatch_api_invoice_listeners(payment: Payment):
     """
@@ -159,3 +166,24 @@ async def mark_webhook_sent(payment: Payment, status: int) -> None:
         """,
         (status, payment.payment_hash),
     )
+
+
+async def send_payment_push_notification(payment: Payment):
+    wallet = await get_wallet(payment.wallet_id)
+
+    if wallet:
+        subscriptions = await get_webpush_subscriptions_for_user(wallet.user)
+
+        amount = int(payment.amount / 1000)
+
+        title = f"LNbits: {wallet.name}"
+        body = f"You just received {amount} sat{'s'[:amount^1]}!"
+
+        if payment.memo:
+            body += f"\r\n{payment.memo}"
+
+        for subscription in subscriptions:
+            url = (
+                f"https://{subscription.host}/wallet?usr={wallet.user}&wal={wallet.id}"
+            )
+            await send_push_notification(subscription, title, body, url)