117 lines
3.7 KiB
Ruby
117 lines
3.7 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Trends::Links < Trends::Base
|
|
PREFIX = 'trending_links'
|
|
|
|
self.default_options = {
|
|
threshold: 15,
|
|
review_threshold: 10,
|
|
max_score_cooldown: 2.days.freeze,
|
|
max_score_halflife: 8.hours.freeze,
|
|
}
|
|
|
|
def register(status, at_time = Time.now.utc)
|
|
original_status = status.reblog? ? status.reblog : status
|
|
|
|
return unless original_status.public_visibility? && status.public_visibility? &&
|
|
!original_status.account.silenced? && !status.account.silenced? &&
|
|
!original_status.spoiler_text?
|
|
|
|
original_status.preview_cards.each do |preview_card|
|
|
add(preview_card, status.account_id, at_time) if preview_card.appropriate_for_trends?
|
|
end
|
|
end
|
|
|
|
def add(preview_card, account_id, at_time = Time.now.utc)
|
|
preview_card.history.add(account_id, at_time)
|
|
record_used_id(preview_card.id, at_time)
|
|
end
|
|
|
|
def get(allowed, limit)
|
|
preview_card_ids = currently_trending_ids(allowed, limit)
|
|
preview_cards = PreviewCard.where(id: preview_card_ids).index_by(&:id)
|
|
preview_card_ids.map { |id| preview_cards[id] }.compact
|
|
end
|
|
|
|
def refresh(at_time = Time.now.utc)
|
|
preview_cards = PreviewCard.where(id: (recently_used_ids(at_time) + currently_trending_ids(false, -1)).uniq)
|
|
calculate_scores(preview_cards, at_time)
|
|
trim_older_items
|
|
end
|
|
|
|
def request_review
|
|
preview_cards = PreviewCard.where(id: currently_trending_ids(false, -1))
|
|
|
|
preview_cards_requiring_review = preview_cards.filter_map do |preview_card|
|
|
next unless would_be_trending?(preview_card.id) && !preview_card.trendable? && preview_card.requires_review_notification?
|
|
|
|
if preview_card.provider.nil?
|
|
preview_card.provider = PreviewCardProvider.create(domain: preview_card.domain, requested_review_at: Time.now.utc)
|
|
else
|
|
preview_card.provider.touch(:requested_review_at)
|
|
end
|
|
|
|
preview_card
|
|
end
|
|
|
|
return if preview_cards_requiring_review.empty?
|
|
|
|
User.staff.includes(:account).find_each do |user|
|
|
AdminMailer.new_trending_links(user.account, preview_cards_requiring_review).deliver_later! if user.allows_trending_tag_emails?
|
|
end
|
|
end
|
|
|
|
protected
|
|
|
|
def key_prefix
|
|
PREFIX
|
|
end
|
|
|
|
private
|
|
|
|
def calculate_scores(preview_cards, at_time)
|
|
preview_cards.each do |preview_card|
|
|
expected = preview_card.history.get(at_time - 1.day).accounts.to_f
|
|
expected = 1.0 if expected.zero?
|
|
observed = preview_card.history.get(at_time).accounts.to_f
|
|
max_time = preview_card.max_score_at
|
|
max_score = preview_card.max_score
|
|
max_score = 0 if max_time.nil? || max_time < (at_time - options[:max_score_cooldown])
|
|
|
|
score = begin
|
|
if expected > observed || observed < options[:threshold]
|
|
0
|
|
else
|
|
((observed - expected)**2) / expected
|
|
end
|
|
end
|
|
|
|
if score > max_score
|
|
max_score = score
|
|
max_time = at_time
|
|
|
|
# Not interested in triggering any callbacks for this
|
|
preview_card.update_columns(max_score: max_score, max_score_at: max_time)
|
|
end
|
|
|
|
decaying_score = max_score * (0.5**((at_time.to_f - max_time.to_f) / options[:max_score_halflife].to_f))
|
|
|
|
if decaying_score.zero?
|
|
redis.zrem("#{PREFIX}:all", preview_card.id)
|
|
redis.zrem("#{PREFIX}:allowed", preview_card.id)
|
|
else
|
|
redis.zadd("#{PREFIX}:all", decaying_score, preview_card.id)
|
|
|
|
if preview_card.trendable?
|
|
redis.zadd("#{PREFIX}:allowed", decaying_score, preview_card.id)
|
|
else
|
|
redis.zrem("#{PREFIX}:allowed", preview_card.id)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def would_be_trending?(id)
|
|
score(id) > score_at_rank(options[:review_threshold] - 1)
|
|
end
|
|
end
|