31 lines
935 B
Ruby
31 lines
935 B
Ruby
module ScoreCalculator
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EPOC = Time.new(2015, 6, 15).in_time_zone
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COMMENT_WEIGHT = 1.0 / 5 # 1 positive vote / x comments
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TIME_UNIT = 24.hours.to_f
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def self.hot_score(date, votes_total, votes_up, comments_count)
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total = (votes_total + COMMENT_WEIGHT * comments_count).to_f
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ups = (votes_up + COMMENT_WEIGHT * comments_count).to_f
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downs = total - ups
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score = ups - downs
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offset = Math.log([score.abs, 1].max, 10) * (ups / [total, 1].max)
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sign = score <=> 0
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seconds = ((date || Time.current) - EPOC).to_f
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(((offset * sign) + (seconds / TIME_UNIT)) * 10000000).round
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end
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def self.confidence_score(votes_total, votes_up)
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return 1 unless votes_total > 0
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votes_total = votes_total.to_f
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votes_up = votes_up.to_f
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votes_down = votes_total - votes_up
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score = votes_up - votes_down
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score * (votes_up / votes_total) * 100
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end
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end
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