app/lib/score_calculator.rb
module ScoreCalculator
def self.hot_score(resource)
return 0 unless resource.created_at
period = [1, [max_period, resource_age(resource)].min].max
votes_total = resource.votes_for.where(created_at: period.days.ago..).count
votes_up = resource.get_upvotes.where(created_at: period.days.ago..).count
votes_down = votes_total - votes_up
votes_score = votes_up - votes_down
(votes_score.to_f / period).round
end
def self.confidence_score(votes_total, votes_up)
return 1 if votes_total.zero?
votes_total = votes_total.to_f
votes_up = votes_up.to_f
votes_down = votes_total - votes_up
score = votes_up - votes_down
score * (votes_up / votes_total) * 100
end
def self.max_period
Setting["hot_score_period_in_days"].to_i
end
def self.resource_age(resource)
((Time.current - resource.created_at) / 1.day).ceil
end
end