[Imagefap] Add "folder" metadata when downloading a folder or user profile.
No additional request is made to the server.
Use for example with the following configuration :
"parent-metadata": true
"directory":["{category}", "{uploader}", "{folder}", "{gallery_id} {title}"]
Introduce an 'initialize()' function that does the actual init
(session, cookies, config options) and can called separately from
the constructor __init__().
This allows, for example, to adjust config access inside a Job
before most of it already happened when calling 'extractor.find()'.
'/?&#' -> '/?#' and '?&#' -> '?#'
According to https://www.ietf.org/rfc/rfc3986.txt, URLs are
"organized hierarchically" by using "the slash ("/"), question
mark ("?"), and number sign ("#") characters to delimit components"
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
Child extractors are now directly constructed with Extractor.from_url()
if the extractor class is known beforehand, instead of using
extractor.find() and searching through all possible extractor classes.
ImageFap- and all Manga-Extractors will transfer their (sub)category
values to other extractors instantiated by them, which will in turn
allow those to use options set for their parents.
Example:
ImagefapGalleryExtractors will use options set under
extractor.imagefap.user, if (and only if) they have been instantiated by
a ImagefapUserExtractor; and options from extractor.imagefap.gallery
otherwise.
The same filter infrastructure that can be applied to image URLS now
also works for manga chapters and other delegated URLs.
TODO: actually provide any metadata (currently supported is only
deviantart and imagefap).
This commit mostly replaces all minus-signs ('-') in keyword names with
underscores ('_') to allow them to be used in filter-expressions. For
example 'gallery-id' got renamed to 'gallery_id'.
(It is theoretically possible to access any variable, regardless of its
name, with 'locals()["NAME"]', but that seems a bit too convoluted if
just 'NAME' could be enough)
