Conversion support

[Casvt]

No description provided.

[Casvt]

The setting values can be found at GET /settings and then the keys convert (post-download convert; bool) and format_preference (format preference; List[str]).

The available formats can be acquired by fetching GET /settings/availableformats. The value of format_preference when doing POST /settings should be a list where all values are a string and should be found in the output of GET /settings/availableformats.

The conversion proposal can be fetched from GET /volumes/<int:id>/convert and GET /issues/<int:id>/convert. It is not implemented in the backend yet, so I have made the function return an example for now with which you can work. Both the example output (current) and the actual output in the future are in the following format:

[
    {
        'before': '/folder/file.zip'
        'after': '/folder/file.cbz'
    },
    {
        'before': '/folder/file_2.zip'
        'after': '/folder/file_2.cbz'
    }
]

Applying the conversion can be done via POST /volumes/<int:id>/convert and POST /issues/<int:id>/convert. The body should be a List[str] where each str is a filepath from the before key in the proposal. E.g. ['/folder/file.zip', '/folder/file_2.zip'].

As far as I know, this is all you need to build the frontend, but let me know if you're missing something or have a question :)

[Casvt]

All the backend is written now. Only thing left is the frontend and adding more conversion classes. The only conversion available currently is ZIP to CBZ (because it's purely renaming the extension, so easy to add and test with). But now we can start adding conversions like RAR to CBR, RAR to CBZ, RAR to ZIP, etc.

Maybe we should also add conversion methods for turning an archive file (CBZ, ZIP, RAR, CBR, EPUB, etc.) in to raw files on the disk? Something like: extract files in to sub-folder -> filter extracted files for relevance -> delete irrelevant files -> move and rename relevant files. That is exactly what the unzipping feature is doing currently.

Then we can merge unzipping with converting, because then unzipping is just the same as converting a ZIP to files. I think that, whatever way we do it, we should combine unzipping and conversion into one feature.

[Casvt]

Added UI for conversion, so only the only thing left is the conversion settings in the UI and merging unzipping with converting.