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candidate.py
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candidate.py
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# -*- coding: utf-8 -*-
# standard libs
from enum import Enum
# project libs
from retry import RetryOnFailure
class SortingStrategy(Enum):
VIEWS_PER_SECOND = "VIEWS_PER_SECOND"
BOOKMARKS_PER_SECOND = "BOOKMARKS_PER_SECOND"
BOOKMARKS_PER_VIEW = "BOOKMARKS_PER_VIEW"
def __str__(self):
return self.value
class Candidate(object):
# how to prioritize candidates
strategy = SortingStrategy.BOOKMARKS_PER_VIEW
def __init__(self, id, title, imgurl, views, bookmarks, timedelta):
self.id = id
self.title = title
self.imgurl = imgurl
self.views = views
self.bookmarks = bookmarks
self.timedelta = timedelta
def __lt_vps(self, other):
return (self.views / self.timedelta.total_seconds()) > (other.views / other.timedelta.total_seconds())
def __lt_bps(self, other):
return (self.bookmarks / self.timedelta.total_seconds()) > (other.bookmarks / other.timedelta.total_seconds())
def __lt_bpv(self, other):
return (self.bookmarks / self.views) > (other.bookmarks / other.views)
def __lt__(self, other):
if not self.valid():
return False
if not other.valid():
return True
dispatch = {
SortingStrategy.VIEWS_PER_SECOND: self.__lt_vps,
SortingStrategy.BOOKMARKS_PER_SECOND: self.__lt_bps,
SortingStrategy.BOOKMARKS_PER_VIEW: self.__lt_bpv
}
return dispatch[Candidate.strategy](other)
def valid(self):
return (self.timedelta.total_seconds() > 0) and (self.views > 0)
def imgpath(self):
return ("./Images/%s.jpg" % self.id)
@RetryOnFailure()
def download(self, api):
api.download(self.imgurl, path = "./Images", fname = ("%s.jpg" % self.id))