72 lines
2.7 KiB
Ruby
72 lines
2.7 KiB
Ruby
class BlackBox
|
|
OUR_EPOCH_NUMBER = "2010-01-01 00:00:01".to_time.to_i # Arbitrary date, but the one we went with.
|
|
class << self
|
|
def article_hotness_score(article)
|
|
usable_date = article.crossposted_at || article.published_at
|
|
reaction_points = article.score
|
|
super_super_recent_bonus = usable_date > 1.hour.ago ? 28 : 0
|
|
super_recent_bonus = usable_date > 8.hours.ago ? 81 : 0
|
|
recency_bonus = usable_date > 12.hours.ago ? 280 : 0
|
|
today_bonus = usable_date > 26.hours.ago ? 795 : 0
|
|
two_day_bonus = usable_date > 48.hours.ago ? 830 : 0
|
|
four_day_bonus = usable_date > 96.hours.ago ? 930 : 0
|
|
if usable_date < 4.days.ago
|
|
reaction_points /= 2 # Older posts should fade
|
|
end
|
|
if usable_date < 7.days.ago
|
|
reaction_points /= 4 # Older posts should fade
|
|
end
|
|
if article.decorate.cached_tag_list_array.include?("watercooler")
|
|
reaction_points = (reaction_points * 0.8).to_i # watercooler posts shouldn't get as much love in feed
|
|
end
|
|
|
|
article_hotness = last_mile_hotness_calc(article)
|
|
|
|
(
|
|
article_hotness + reaction_points + recency_bonus + super_recent_bonus +
|
|
super_super_recent_bonus + today_bonus + two_day_bonus + four_day_bonus
|
|
)
|
|
end
|
|
|
|
def comment_quality_score(comment)
|
|
descendants_points = (comment.descendants.size / 2)
|
|
rep_points = comment.reactions.sum(:points)
|
|
bonus_points = calculate_bonus_score(comment.body_markdown)
|
|
spaminess_rating = calculate_spaminess(comment)
|
|
(rep_points + descendants_points + bonus_points - spaminess_rating).to_i
|
|
end
|
|
|
|
def calculate_spaminess(story)
|
|
user = story.user
|
|
return 100 unless user
|
|
return 0 if user.trusted
|
|
return 0 if user.badge_achievements_count.positive?
|
|
|
|
base_spaminess = 0
|
|
base_spaminess += 25 if social_auth_registration_recent?(user) && user.registered_at > 25.days.ago
|
|
base_spaminess
|
|
end
|
|
|
|
private
|
|
|
|
def calculate_bonus_score(body_markdown)
|
|
size_bonus = body_markdown.size > 200 ? 2 : 0
|
|
code_bonus = body_markdown.include?("`") ? 1 : 0
|
|
size_bonus + code_bonus
|
|
end
|
|
|
|
def last_mile_hotness_calc(article)
|
|
score_from_epoch = article.featured_number.to_i - OUR_EPOCH_NUMBER # Approximate time of publish - epoch time
|
|
score_from_epoch / 1000 +
|
|
([article.score, 650].min * 2) +
|
|
([article.comment_score, 650].min * 2) -
|
|
(article.spaminess_rating * 5)
|
|
end
|
|
|
|
def social_auth_registration_recent?(user)
|
|
# was the social auth account created very recently?
|
|
social_auth_date_plus_two_days = ((user.github_created_at || user.twitter_created_at || 3.days.ago) + 2.days)
|
|
user.registered_at < social_auth_date_plus_two_days
|
|
end
|
|
end
|
|
end
|