Enabled transient notifications on Linux

[olumidesan]

Hello!

Transient notifications (notifications that don't persist in the notifications list) are not programmable on Linux, even though they can be. The reason or this is because the hint[s] parameter required by notify-send and dbus cannot be passed to the base Notification.notify() method.

I've implemented a simple solution that allows the other keyword arguments to be passed to the notify() method, allowing the underlying _notify() implementation to use hint[s] and other notification arguments as required.

Currently, trying to use hints with the notify() call fails:

>>> from plyer import notification
>>> print(notification)
<plyer.platforms.linux.notification.NotifyDbus object at 0x7f72cb4d4040>
>>> notification.notify(title="Hello", message="World", hints={'transient':1})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: notify() got an unexpected keyword argument 'hints'

...even though the underlying NotifyDBus implementation clearly supports it:

plyer/plyer/platforms/linux/notification.py

Line 35 in 0c226e1

hints = kwargs.get('hints', [])

With these changes, the transient notifications work as expected.

>>> from plyer import notification
>>> print(notification)
<plyer.platforms.linux.notification.NotifyDbus object at 0x7f39fd5ed520>
>>> notification.notify(title="Hello", message="World", hints={'transient':1})
>>> 

The notify-send implementation also did not support other arguments other than the title and the message. I've added support for hint, urgency, etc., as supported by the notify-send binary itself:

❯ notify-send --help
Usage:
  notify-send [OPTION…] <SUMMARY> [BODY] - create a notification

Help Options:
  -?, --help                        Show help options

Application Options:
  -u, --urgency=LEVEL               Specifies the urgency level (low, normal, critical).
  -t, --expire-time=TIME            Specifies the timeout in milliseconds at which to expire the notification.
  -a, --app-name=APP_NAME           Specifies the app name for the icon
  -i, --icon=ICON[,ICON...]         Specifies an icon filename or stock icon to display.
  -c, --category=TYPE[,TYPE...]     Specifies the notification category.
  -h, --hint=TYPE:NAME:VALUE        Specifies basic extra data to pass. Valid types are int, double, string and byte.
  -v, --version                     Version of the package.

[akshayaurora]

@olumidesan Apologies for the delay. 👍