Let desktop and mobile clients know about web features

[michaelstingl]

Is your feature request related to a problem? Please describe.

ownCloud desktop and mobile apps have a limited feature set, but users could open the web UI for all the remaining features. For this, it would need capabilities or a new endpoint where clients could get information, which file actions are available for a resource (file/folder/space) in the web UI:

Related:

• Open Sidebar panels with parameter added to link web#7927
• Direct access new, roles-based oCIS sharing in ownCloud web client#10206

Describe the solution you'd like

1) Add capabilities with the string ?details=$tabId to extend the private link

Ugly, because clients would need to compose http://host/owncloud/f/$fileId + ?details=$tabId manually

2) New endpoint that lets clients know all available file actions for a resource (file/folder/space)

Benefit would be, it could in the future also include a short-living token that allows certain actions in the web UI, without the need for re-login. (irrelevant with SSO)

Describe alternatives you've considered

A while ago, I thought about using the AppProvider for this:

• Expose link to Versions web UI via AppProvider for clients #2792

@tbsbdr @micbar @kulmann this would be a high-prio item right after oCIS GA.

/cc @TheOneRing

[michaelstingl]

@fschade join forces with @TheOneRing to find the best solution? Happy to join too…