- let the GalleryExtractor class inherit directly from Extractor
- make ChapterExtractor a subclass of GalleryExtractor
- change enumeration field names of GalleryExtractors to 'num'
These metadata fields will only be filled in when using a top-level
URL, because that's the only place this information is available. Using
a Foolslide URL (1) will leave these fields empty.
(1) https://hentai.cafe/manga/read/.../en/0/1/"
Instead of getting a complete 'filename' from an URL and splitting that
into 'name' and 'extension', the new approach gets rid of the complete
version and renames 'name' to 'filename'. (Using anything other than
{extension} for a filename extension doesn't really work anyway)
Example: "https://example.org/path/filename.ext"
before:
- filename : filename.ext
- name : filename
- extension: ext
now:
- filename : filename
- extension: ext