083732e2f3
* Improve performance of follow recs * Finish and simplify * Update tests * Update tests * Update tests * Change onboardings_controller * Adjust tests * Change fallback to use score * Adjust join
54 lines
2.1 KiB
Ruby
54 lines
2.1 KiB
Ruby
class BlackBox
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OUR_EPOCH_NUMBER = "2010-01-01 00:00:01".to_time.to_i # Arbitrary date, but the one we went with.
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class << self
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def article_hotness_score(article)
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usable_date = article.crossposted_at || article.published_at
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reaction_points = article.score
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super_super_recent_bonus = usable_date > 1.hour.ago ? 28 : 0
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super_recent_bonus = usable_date > 8.hours.ago ? 81 : 0
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recency_bonus = usable_date > 12.hours.ago ? 280 : 0
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today_bonus = usable_date > 26.hours.ago ? 795 : 0
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two_day_bonus = usable_date > 48.hours.ago ? 830 : 0
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four_day_bonus = usable_date > 96.hours.ago ? 930 : 0
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featured_bonus = article.featured ? 200 : 0
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if usable_date < 4.days.ago
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reaction_points /= 2 # Older posts should fade
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end
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if usable_date < 7.days.ago
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reaction_points /= 4 # Older posts should fade
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end
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if article.decorate.cached_tag_list_array.include?("watercooler")
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reaction_points = (reaction_points * 0.8).to_i # watercooler posts shouldn't get as much love in feed
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end
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article_hotness = last_mile_hotness_calc(article)
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(
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article_hotness + reaction_points + recency_bonus + super_recent_bonus +
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super_super_recent_bonus + today_bonus + two_day_bonus + four_day_bonus + featured_bonus
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)
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end
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def comment_quality_score(comment)
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descendants_points = (comment.descendants.size / 2)
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rep_points = comment.reactions.sum(:points)
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bonus_points = calculate_bonus_score(comment.body_markdown)
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(rep_points + descendants_points + bonus_points).to_i
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end
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private
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def calculate_bonus_score(body_markdown)
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size_bonus = body_markdown.size > 200 ? 2 : 0
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code_bonus = body_markdown.include?("`") ? 1 : 0
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size_bonus + code_bonus
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end
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def last_mile_hotness_calc(article)
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score_from_epoch = article.published_at.to_i - OUR_EPOCH_NUMBER # Approximate time of publish - epoch time
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(score_from_epoch / 1000) +
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([article.score, 650].min * 2) +
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([article.comment_score, 650].min * 2)
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end
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end
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end
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