PHP webpush library (Minishlink\WebPush) no event.data - php

Question

I have configured webpush and all is going well... I have registered the service-worker.js, can request permission, save the subscription to my db and send a push notification from the server using the library which is installed.
When I send the push notification
[
'subscription' => Subscription::create($subs_arr),
'payload' => '{"title":"test title","msg":"Hello World!", "icon":"https://www.newhomesforsale.co.uk/media/chevron.png","url":"https://www.newhomesforsale.co.uk/"}'
]
];
I get a success message:
[v] Message sent successfully for subscription https://fcm.googleapis.com/fcm/send/e2JHJ2YcIfM:APA91bHwU7CruFTDkpAH-zbnJRNhvJEK-mCze2hFNa48mdK8pk-oWuXJUn57Ai9Nw0d-skviCfJ40g1yX7qWKucGHPF3jeNyhkJfZ-8kpxYJNQowrAR561b0dQZJAseL_eBsJRMrxnDP.
and a push message appears in the browser - great.
The problem I have is that the service-worker file doesn't seem to see the payload information because the message displays even as simply
Oh No - no data {"isTrusted": true}
Service-worker file:
self.addEventListener('push', function(event) {
if (!(self.Notification && self.Notification.permission === 'granted')) {
return;
}
const sendNotification = body => {
// you could refresh a notification badge here with postMessage API
const title = "Web Push example";
return self.registration.showNotification(title, {
body,
});
};
if (event.data) {
const message = event.data.text();
event.waitUntil(sendNotification(message));
} else {
do_serverlog('Push event but no data');
sendNotification("Oh No - no data" + JSON.stringify(event));
}
});
Would be great to get the last piece of the puzzle to figure out how to correctly send/read the payload.

Answer 1

I have found that I made a mistake passing throught the keys into the subscription ($subs_arr).
It seems that if you have provide the endpoint, but not the keys, the push notification still works, but with the data stripped out. This sidetracked me as I had assumed that it wouldn't work at all if the keys were missing.
I thought maybe this might help someone at some point.