Get rid of ajax/getstoragestats.php

[PVince81]

Description

See #26067.
Retrieve the necessary information from the file list's current directory element which is fetched from Webdav.

Related Issue

#26067

Motivation and Context

Less code path and get the info from where it's already available.
Kill ajax endpoints.

How Has This Been Tested?

Open folder, check FileList.dirInfo in the console.
Try uploading a file when there is not enough space left, no Webdav call made, warning appears.
Check that every 5 minutes a PROPFIND is made on the current folder and FileList.dirInfo contains the updated info.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Tech debt

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[mention-bot]

@PVince81, thanks for your PR! By analyzing the annotation information on this pull request, we identified @MorrisJobke, @DeepDiver1975 and @LukasReschke to be potential reviewers

[PVince81]

TODOS:

• adjust storage warnings
• debounce refresh function

[PVince81]

Hmmm, getting the storage quota from PROPFIND is trickier than I thought.

For the current user "quota-used-bytes" only contains the wanted value when doing a PROPFIND on the "/" path. But for received shares, one would need to do a PROPFIND on the share root instead to get the quota value from there. But even then, that value is actually the same (apparently?) like the "oc:size" which is mostly "how much bytes used by the contents of this share". But what we want is the actual used bytes of the sharing user's whole storage.

All this is only to be able to detect whether more than 98% storage is used to display a warnings. This was achieved by "usedSpacePercent".

[PVince81]

I'd be tempted to get rid of this notification and implement it differently as a notification, which is basically a quota notification that the user would receive not only in the web UI but also on other clients.
See https://github.com/owncloud/core/issues/6878

[PVince81]

• try and get rid of storage stats polling altogether
  • make the free space check be only on the server side at upload time, no need for pre-check

[PVince81]

I have now removed the polling of the storage stats.
Now it will only be called in moments where it makes sense: after an upload.
Of course also after switching folders the dirInfo is updated as well, which is the new base for the storage stats.

I'd like to get rid of the message about "your storage is almost full" and replace it with a notification in the future.

[PVince81]

moving to backlog, no time for this and there are blockers

[PVince81]

still waiting for the notification when close to quota

[PVince81]

files app will eventually be replaced by Phoenix

not much point cleaning up the old code