Allow prioritizing default file actions for a mime type (per user)

[nickvergessen]

Steps to reproduce

1. Enable richdocuments to have rich editing for odt files
2. Enable files_texteditor because you want txt files to be simple
3. Open an txt file: richdocuments starts

I think it would be nice to have something like a priority of the actions. Currently the last one wins, and since richdocuments is after files_texteditor in the alphabet, files_texteditor has no way to ever win this.

Proposal is to add something like priority to:

server/apps/files/js/fileactions.js

Line 144 in 2b79490

var actionSpec = {

and then:

			if (!!this.actions[mime][name] && this.actions[mime][name].priority < actionSpec.priority) {
				return;
			}

This would allow the files_texteditor to register for text files, while richdocuments can also, so in case files_texteditor is not there, you can still edit them.

Alternate approach would be hacking into richdocuments to only register, when files_texteditor is not there.

cc @MorrisJobke @LukasReschke

cc @RealKelsar for reporting it in IRC

[MorrisJobke]

This would allow the files_texteditor to register for text files, while richdocuments can also, so in case files_texteditor is not there, you can still edit them.

I like that approach more. The cleaner hack. But still feels like a hack.

[LukasReschke]

I'd rather prefer a "Open with" dialogue but yay, JavaScript 😉

[susnux]

There are priorities for file actions now, but we still have two problems:

1. Actions that register as default actions -> if there are multiple we use the most important one without letting the user choose.
2. multiple handlers on the viewer (e.g. richdocuments and text both use the viewer)

1 is a server issue (this on) and 2 is a viewer issue and handled here: nextcloud/viewer#2393