[dolphin] [Bug 502419] New: More robust duplicate detection when overwriting file

https://bugs.kde.org/show_bug.cgi?id=502419

            Bug ID: 502419
           Summary: More robust duplicate detection when overwriting file
    Classification: Applications
           Product: dolphin
           Version: 24.12.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: general
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: ---

SUMMARY
When copying/moving a file to a path where a file with the same name exists, a
dialog is shown stating that the files seem identical with the following
tooltip:

"The files are likely to be identical: They have the same size and their
contents are the same at the beginning, middle and end"

Perhaps this could be more robust.

STEPS TO REPRODUCE
1. Copy a file to a path where another copy already exists.

OBSERVED RESULT
A dialog stating the following:
"The files are likely to be identical: They have the same size and their
contents are the same at the beginning, middle and end"

EXPECTED RESULT
I'd expect that a robust method is used to ensure one doesn't accidentally
overwrite a file if it is different. I don't know how big the portions are
which are being compared, but maybe a SHA checksum would reduce the likelihood
of collisions.
The "Checksums" tab of the properties dialog already integrates various
checksums, so that could be adapted.

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20250329
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.13.8-1-default (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION

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