"""Extractors for *booru sites"""
from .common import BaseExtractor, Message
from .. import text
import operator
class BooruExtractor(BaseExtractor):
"""Base class for *booru extractors"""
basecategory = "booru"
filename_fmt = "{category}_{id}_{md5}.{extension}"
page_start = 0
per_page = 100
def items(self):
self.login()
data = self.metadata()
tags = self.config("tags", False)
notes = self.config("notes", False)
fetch_html = tags or notes
if url_key := self.config("url"):
if isinstance(url_key, (list, tuple)):
self._file_url = self._file_url_list
self._file_url_keys = url_key
else:
self._file_url = operator.itemgetter(url_key)
for post in self.posts():
try:
url = self._file_url(post)
if url[0] == "/":
url = self.root + url
except Exception as exc:
self.log.debug("%s: %s", exc.__class__.__name__, exc)
self.log.warning("Unable to fetch download URL for post %s "
"(md5: %s)", post.get("id"), post.get("md5"))
continue
if fetch_html:
html = self._html(post)
if tags:
self._tags(post, html)
if notes:
self._notes(post, html)
if "extension" not in post:
text.nameext_from_url(url, post)
post.update(data)
self._prepare(post)
yield Message.Directory, post
yield Message.Url, url, post
def skip(self, num):
pages = num // self.per_page
self.page_start += pages
return pages * self.per_page
def login(self):
"""Login and set necessary cookies"""
def metadata(self):
"""Return a dict with general metadata"""
return ()
def posts(self):
"""Return an iterable with post objects"""
return ()
_file_url = operator.itemgetter("file_url")
def _file_url_list(self, post):
urls = (post[key] for key in self._file_url_keys if post.get(key))
post["_fallback"] = it = iter(urls)
return next(it)
def _prepare(self, post):
"""Prepare a 'post's metadata"""
def _html(self, post):
"""Return HTML content of a post"""
def _tags(self, post, page):
"""Extract extended tag metadata"""
def _notes(self, post, page):
"""Extract notes metadata"""
