[okular] [Bug 449976] New: Can't open okular document archive saved from a directory of images

[dirtyice]

https://bugs.kde.org/show_bug.cgi?id=449976

            Bug ID: 449976
           Summary: Can't open okular document archive saved from a
                    directory of images
           Product: okular
           Version: 21.12.2
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: kdebugs at dirty-ice.org
  Target Milestone: ---

SUMMARY
After okular's only useful feature was removed a couple of years ago, I finally
gathered my courage and tried to save the annotations I made, but okular can't
read its own format back.

STEPS TO REPRODUCE
1. Open a directory with a buch of jpg images, make some annotations
2. When exiting, it will ask to save the chages. Click on save.
3. It will conplain that it can't save in the curent format, click on Save as
Okular document archive
4. "After saving, the current document format requires the file to be reloaded.
Your undo/redo history will be lost.
Do you want to continue?" Click on yes.

OBSERVED RESULT
Okular quits. In the console I see

kf.kio.slaves.file: copy() QUrl("file:///tmp/okular.CSKYyV") to
QUrl("file:///home/dirty_ice/test") mode= -1
kf.kio.slaves.file: the file doesn't have any xattr
org.kde.okular.core: No plugin for mimetype '"application/zip"'.
The document hasn't been reloaded/swapped correctly

Trying to open the file manually, it says "Can not find a plugin which is able
to handle the document being passed." Okay, it didn't include the .okular
extension automatically, fix it and try again:
"Could not open file:///home/dirty_ice/test.okular."
And that's all.
The only way I managed to get my annotations back was to open the metadata.xml
inside the .okular file, and copy the <pageList> to
~/.local/share/okular/docdata/<some_random_name>.xml, in this case when I open
the dir my annotations are back, along with a message that this is deprecated
and save to a file if I want to edit the document. Except the Save as button is
disabled (both on the message and in the file menu), and it's read only, so I
can't create new annotations or modify existing ones either.

EXPECTED RESULT
It should open the .okular file, hopefully without packing the hundreds of
megabytes of images into it.

SOFTWARE/OS VERSIONS
Windows: nope
macOS: no way
Linux/KDE Plasma: Gentoo linux ~amd64
(available in About System)
KDE Plasma Version: not installed (I'm using awesome as a WM)
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

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