Flutter permission_handler check if permission was asked before

I am using the permission_handler which is working fine, but now I need to know if a certain Permission has been requested before.

So I am looking for something like PermissionStatus.notDetermined. Does this package offer something like this? I couldn't find it, but it is at least for me quite an important thing to know.

I know there is something similar in the firebase_messaging package.

I only want to display a pop up, if the the systemPermissionStatus has NOT been requested before.

This can of course also be done with saving some values like "wasRequested" in SharedPreferences for example, but I thought there must be an existing function for this usecase?

Let me know if you need any more information.

Update

I also noticed that status and the returned status from .request is different.

That doesn't make any sense for me, it's super confusing.

final stat = await Permission.notification.status; // -> denied
final req = await Permission.notification.request(); // -> permanentlyDenied

Solution

as @gopelkujo already pointed out:

denied can be used as notDetermined

The wording "denied" is a bit confusing I think..

To my issue: It was always giving me back denied instead of permanentlyDenied, because I didn't do the configuration correctly. After adding the setup in the Podfile, everything is working as expected.

    # You can remove unused permissions here
    # for more information: https://github.com/BaseflowIT/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
    # e.g. when you don't need camera permission, just add 'PERMISSION_CAMERA=0'
    config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
      '$(inherited)',

      ## dart: PermissionGroup.camera
      'PERMISSION_CAMERA=1',

      ## dart: PermissionGroup.photos
      'PERMISSION_PHOTOS=1',

      ## dart: PermissionGroup.notification
      'PERMISSION_NOTIFICATIONS=1',

      ## dart: PermissionGroup.appTrackingTransparency
      'PERMISSION_APP_TRACKING_TRANSPARENCY=1',