Rename conflicted not published folder/file on creating/uploading

[yurabakhtin]

Issue: humhub/humhub#6433 (comment)

In the case of the File module you are right.
Probably we should change the handling here. So if a file is in status Pending/Soft Deletion and in the meantime a new file with the same filename is uploaded, we could also rename the deleted file e.g. from "test.doc" to "conflict[fileid]-test.doc". (Same for other modules)
This would also solves some other problems (e.g. OnlyOffice module ONLYOFFICE/onlyoffice-humhub#100)

Ok, as I understood we should modify core code, (not CFiles module):

• If we new File is uploaded with same name and its ContentActiveRecord is soft deleted then we should rename to conflict[fileid]-test.doc, (fileid - is ID of the soft deleted File, right?)
• otherwise do as now.

Should I create a separate issue for this or can I start to implement it here?

No. as I understood, the CFiles module has implemented a special handling here.
Specifically, when a file is marked as Deleted it get the status Published again if they have the same filename (CFiles.Title).

e.g. https://github.com/humhub/cfiles/blob/master/controllers/EditController.php#L52

Instead of restoring the file/folder here. We should rename the soft deleted file/folder and create a fresh record as normal.