a method to know if a joystick is plugged

[SuperUserNameMan]

Operating system or device - Godot version:
Official 2.0.3stable and custom 2.1alpha

Issue description (what happened, and what was expected):

I've found no method to know if a joystick is already plugged.

The workarounds are :

• scan device from 0 to 15 using Input.is_joy_known() ; but, if I understood correctly, it will only return true if the joystick has a mapping.
• ask the player to press a button and capture the device number in event.

I would like to know in advance how many joysticks are already connected without asking to the players to press buttons.

Steps to reproduce:

Link to minimal example project (optional but very welcome):

[27thLiz]

Good catch.
Should we have a method that returns an array of connected device IDs or do you want to query the connection status of individual devices? Or maybe both ;)

[SuperUserNameMan]

I think i'd be happy with any one of these two methods, so I guess that having both would be a bliss ^^

[27thLiz]

On a second thought, I think the first one will be enough.
With that, one can easily replicate the other one:

if device_id in Input.get_connected_joysticks():

[kakoeimon]

I used this method to find out if a joystick is plugged.
if Input.get_joy_name(0):

Without joystick Input.get_joy_name() returns an empty string which can be used in as false.

[SuperUserNameMan]

@kakoeimon : oh thanks for the idea. I did not think of it !