refactor: use the new NotificationFramework for pushing notifications

[nicholaswmin]

Fixes #52

Replace NSUserNotification API with UserNotifications.frameworks API.

• Import UserNotifications/UserNotifications.h in alerter/AppDelegate.h and alerter/AppDelegate.m.
• Conform to UNUserNotificationCenterDelegate instead of NSUserNotificationCenterDelegate in alerter/AppDelegate.h.
• Replace NSUserNotification with UNNotificationRequest for creating notifications in alerter/AppDelegate.m.
• Replace NSUserNotificationCenter delegate methods with UNUserNotificationCenter delegate methods in alerter/AppDelegate.m.
• Update methods to use UNUserNotificationCenter for managing notifications in alerter/AppDelegate.m.
• Remove references to NSUserNotification in alerter/main.m.

[Tobbe]

What's the status of this PR? Is it ready to be merged? If I pull this down, can I build it and use it with the new MacOS notification API? What about code signing? Is that something I need to read up on? I've never have to deal with that before.

[nicholaswmin]

@Tobbe Hi Tobbe; sorry for the late reply - should be good. No code-signing.
But should be buildable, have you tried doing so?

[Tobbe]

No worries at all about the reply. Thanks for getting back to me 🙏
I haven't tried building yet, but next time I have time for the side-project I need this for I'll give it a go.
About code signing – it was more about being able/allowed to show the alerts. Maybe it was specifically for having a custom icon? But don't worry about it. I'll just try it and see what happens :D

[quarkw]

@nicholaswmin this doesn't seem to build for me:

Macos Sequoia 15.4.1 (24E263)
Xcode Version 16.3 (16E140)

       > /private/tmp/nix-build-alerter-1.0.1.drv-0/source/alerter/AppDelegate.m:414:5: error: statement requires expression of integer type ('NSString *' invalid)
       >   414 |     switch (notification.request.content.categoryIdentifier) {
       >       |     ^       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       > /private/tmp/nix-build-alerter-1.0.1.drv-0/source/alerter/AppDelegate.m:415:14: error: integer constant expression must have integer type, not 'NSString *'
       >   415 |         case @"actionsCategory": {
       >       |              ^~~~~~~~~~~~~~~~~~
       > /private/tmp/nix-build-alerter-1.0.1.drv-0/source/alerter/AppDelegate.m:423:14: error: integer constant expression must have integer type, not 'NSString *'
       >   423 |         case @"replyCategory": {
       >       |              ^~~~~~~~~~~~~~~~
       > /private/tmp/nix-build-alerter-1.0.1.drv-0/source/alerter/AppDelegate.m:429:14: error: integer constant expression must have integer type, not 'NSString *'
       >   429 |         case @"closeCategory": {
       >       |              ^~~~~~~~~~~~~~~~
       > 4 errors generated.

[vjeantet]

Hello, I've been investigating the use of this new API over the past few months.

The biggest issue is the loss of features (sender, ignoresDoNotDisturb, dynamic buttons, dynamic image...) and the need to restructure the app as a .app bundle rather than a simple CLI executable to make the new framework work.

😢