MPRIS OpenUri function not implemented

[Bettehem]

Describe the bug
MPRIS OpenUri function isn't implemented

To Reproduce
Steps to reproduce the behavior:

1. Try to open a track in Spot by calling the MPRIS OpenUri function, for example by running
   playerctl -p Spot open https://open.spotify.com/track/1Mv6RNqjUuX8ibX349Hgc6
2. Returns "Could not execute command: GDBus.Error:org.freedesktop.DBus.Error.NotSupported: Not implemented"

Expected behavior
Spot should start playing music based on the given link

General information:

• Distribution: tested on Arch Linux and Droidian
• Installation method [e. g. built from source, installed from Flathub...]: built from source
• Version [e.g. 0.1.0]: 0.3.3
• Device used [e. g. desktop, phone...]: Desktop PC and Mobile phone

Additional context
I have implemented MPRIS OpenUri support for ncspot too, so I'll probably try adding this myself here too.

[Diegovsky]

I would love to have this actually. Thanks for your report. Would you be willing to open a PR?

[Bettehem]

Hi, sorry for my absence. I have been quite busy with work lately, but I'll get it done at some point in the coming weeks when I get a bit of free time.

[Diegovsky]

Don't worry, any contributions are welcome, at any time :)

[rien333]

I probably should open a separate issue, but supplying links directly to spot currently also does not work:

$ spot https://open.spotify.com/track/6t8aRTXXIcx9JVRD8IRZKR

Actually, when doing so, spot shows the notification "Failed to open link!", indicating that it receives the link, but does not know what to do with it.

The same warning notification is shown when I open a spotify url (https://open.spotify.com/track/X) in firefox, while using the Open in Desktop Spotify Client extension.

My guess is that if one would teach spot to open URLs from the commandline, one would automatically gain the ability to open spot by clicking spotify links on the web — provided, of course, that one's browser is configured correctly.

Interestingly, both spot and the "native" spotify linux app register themselves as spotify URL handlers in firefox. This seems to imply that spot already has some kind of OS-level association with spotify-like URLs.