Push notifications

[poVoq]

I researched this a bit. It seems like the way to do this would be to pass the info back to the XMPP server with mod_push enabled.

ConverseJS does it this way: https://conversejs.org/docs/html/configuration.html#push-app-servers

Apparently the XMPP server then creates an S2S connection to another hosted service that contacts the Google/Apple/etc. push notification service. There are several possible implementations for it (the ones I found):
https://github.com/iNPUTmice/p2 (author willing to integrate Ubports notification service)
https://github.com/ChatSecure/RubDub (complicated setup)
https://github.com/esl/MongoosePush (Only with Mongoose XMPP server?)

Or directly as a Prosody module:
https://github.com/tmolitor-stud-tu/mod_push_appserver

Related documentation on how it works in the case of Ubuntu Touch can be found here:
http://docs.ubports.com/en/latest/appdev/guides/pushnotifications.html

[poVoq]

As an interim solution, HTML browser notifications would be nice. I have disabled them for now as I think they are not working, but maybe I just did something wrong.

[poVoq]

This explains what is being send by the user's XMPP server as a message to the specified JID:
https://xmpp.org/extensions/xep-0357.html#publishing

Could maybe also be used to bootstrap something with NodeRed (XMPP node in and a modified Push node out): this seems relevant:
https://github.com/Xzya/node-red-contrib-push
(apparently Google's Firebase and Ubports notifications work almost the same, just some variable name changes?)

[poVoq]

https://github.com/UWPX/UWPX-Push-Server

New python based push proxy. Might be easier to modify than P2.

[poVoq]

While there is some movement on webpush upstream, I doubt it will be supported by Morph (which behind the scenes is used here too) any time soon.

A possible workaround might be this:
https://gitlab.com/danielside/mod_offlinesms
It can send offline message notifications from the server to SMS, email and telegram. And I guess getting to to push to a Gotify server (there is a nice Gotify app for UT) could also be implemented without too much effort.

[poVoq]

Another hack would be to try to re-base this on the pesbuk app: https://github.com/kugiigi/pesbuk-app
Apparently if you remove background suspension via UT-tweaktool it can intercept the web notifications and push them to the UT notification bar.
(edit: uses special custom code to intercept Facebook specific stuff, so not really an option here it seems)

I have previously tried to run ConverseJS in a qtwebengine app similar to pesbuk and that worked relatively well, so I guess it would be worth a try.

[poVoq]

Experimental webpush support for ConverseJS upstream: conversejs/converse.js#2153
Maybe if embedded Morph would support Webpush?

[poVoq]

Seems like Morph is getting web-push in the near future (work in progress). Lets see if that can also be used with Morph based webapps like this one. But sadly it doesn't look like web-push support will be merged soon for ConverseJS upstream, and it would likely also require xmpp server side support (I think there might be something in progress for Prosody).

[poVoq]

Hmm: https://github.com/balcy/example-webcontainer-notifications
That might work with background suspension disabled...
Edit: Only works with an WIP branch of Morph. I'll try it again when that is merged upstream. Looks promising though.

[poVoq]

Pade (A ConverseJS fork as a browser plugin) has Webpush support. The relevant code seems to be this:
https://github.com/igniterealtime/openfire-pade-plugin/blob/master/pade/classes/public/inverse/webpush.js
Not sure if that can be backported or will ever reach upstream, but it might be a good starting point.