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import logging
import itertools
from datetime import datetime, timedelta
import conf
from .abstract import AbstractController
from .icon import IconController
from web.models import User, Feed
from web.lib.utils import clear_string
logger = logging.getLogger(__name__)
DEFAULT_LIMIT = 5
DEFAULT_MAX_ERROR = conf.DEFAULT_MAX_ERROR
class FeedController(AbstractController):
_db_cls = Feed
def list_late(self, max_last, max_error=DEFAULT_MAX_ERROR,
limit=DEFAULT_LIMIT):
return [feed for feed in self.read(
error_count__lt=max_error, enabled=True,
last_retrieved__lt=max_last)
.join(User).filter(User.is_active == True)
.order_by('last_retrieved')
.limit(limit)]
def list_fetchable(self, max_error=DEFAULT_MAX_ERROR, limit=DEFAULT_LIMIT):
now = datetime.now()
max_last = now - timedelta(minutes=60)
feeds = self.list_late(max_last, max_error, limit)
if feeds:
self.update({'id__in': [feed.id for feed in feeds]},
{'last_retrieved': now})
return feeds
def get_duplicates(self, feed_id):
"""
Compare a list of documents by pair.
Pairs of duplicates are sorted by "retrieved date".
"""
feed = self.get(id=feed_id)
duplicates = []
for pair in itertools.combinations(feed.articles, 2):
date1, date2 = pair[0].date, pair[1].date
if clear_string(pair[0].title) == clear_string(pair[1].title) \
and (date1 - date2) < timedelta(days=1):
if pair[0].retrieved_date < pair[1].retrieved_date:
duplicates.append((pair[0], pair[1]))
else:
duplicates.append((pair[1], pair[0]))
return feed, duplicates
def get_inactives(self, nb_days):
today = datetime.now()
inactives = []
for feed in self.read():
try:
last_post = feed.articles[0].date
except IndexError:
continue
elapsed = today - last_post
if elapsed > timedelta(days=nb_days):
inactives.append((feed, elapsed))
inactives.sort(key=lambda tup: tup[1], reverse=True)
return inactives
def count_by_category(self, **filters):
return self._count_by(Feed.category_id, filters)
def count_by_link(self, **filters):
return self._count_by(Feed.link, filters)
def _ensure_icon(self, attrs):
if not attrs.get('icon_url'):
return
icon_contr = IconController()
if not icon_contr.read(url=attrs['icon_url']).count():
icon_contr.create(**{'url': attrs['icon_url']})
def create(self, **attrs):
self._ensure_icon(attrs)
return super().create(**attrs)
def update(self, filters, attrs):
from .article import ArticleController
self._ensure_icon(attrs)
if 'category_id' in attrs and attrs['category_id'] == 0:
del attrs['category_id']
elif 'category_id' in attrs:
art_contr = ArticleController(self.user_id)
for feed in self.read(**filters):
art_contr.update({'feed_id': feed.id},
{'category_id': attrs['category_id']})
return super().update(filters, attrs)
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