d759ac4627
* Fix menu dropdown disable issue * Initial base work * Add real algorithm * Add working object and test * Fix schema * Fix schema * Fix schema * Finalize * Add update script and explict_points * Proper implicit/explicit points * Fix tests * Add docs * Fix tests * Fix data update script test * Fix data update script test * Fix typo * Improve efficiency and add more logic * Changed to find_each * Change to bulk insert * Update tests and refactor logic * Various improvements * Fix typo * Fix tests * Remove extra line * Fix tests * Fix test typo * Cache site-wide tag names
72 lines
2.9 KiB
Ruby
72 lines
2.9 KiB
Ruby
module Follows
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class UpdatePointsWorker
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include Sidekiq::Worker
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sidekiq_options queue: :low_priority, retry: 10
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def perform(article_id, user_id)
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article = Article.find_by(id: article_id)
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user = User.find_by(id: user_id)
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return unless article && user
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adjust_other_tag_follows_of_user(user.id)
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followed_tag_names = user.cached_followed_tag_names
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article.decorate.cached_tag_list_array.each do |tag_name|
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if followed_tag_names.include?(tag_name)
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recalculate_tag_follow_points(tag_name, user)
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end
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end
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end
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def recalculate_tag_follow_points(tag_name, user)
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tag = Tag.find_by(name: tag_name)
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follow = Follow.follower_tag(user.id).where(followable_id: tag.id).last
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follow.implicit_points = calculate_implicit_points(tag, user)
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follow.save
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end
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def calculate_implicit_points(tag, user)
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last_100_reactable_ids = user.reactions.where(reactable_type: "Article", points: 0..)
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.pluck(:reactable_id).last(100)
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last_100_long_page_view_article_ids = user.page_views.where(time_tracked_in_seconds: 45..)
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.pluck(:article_id).last(100)
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articles = Article.where(id: last_100_reactable_ids + last_100_long_page_view_article_ids)
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tags = articles.pluck(:cached_tag_list).flat_map { |list| list.split(", ") }
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occurrences = tags.count(tag.name)
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bonus = inverse_popularity_bonus(tag)
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Math.log(occurrences + bonus + 1) # +1 is purelt to avoid log(0) => -infinity
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end
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def adjust_other_tag_follows_of_user(user_id)
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# As we bump one follow up, we should also give a slight penalty
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# to other follows to ensure re-balancing of overall points
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# This will help stale tags fade after a temporary interest bump
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# 0.98 is used to ensure this is "a very small amount"
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# And percentage seems to makes sense, as it will be relative to
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# size of current points.
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# That number could be adjusted at any point if we have reason to
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# believe it is too much or too little.
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Follow.follower_tag(user_id).order(Arel.sql("RANDOM()")).limit(5).each do |follow|
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follow.update_column(:points, (follow.points * 0.98))
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end
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end
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def inverse_popularity_bonus(tag)
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# Let's give a bonus to "less popular" tags on the platform
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# To help balance the weight of popular topic.
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# On DEV, javascript has way more taggings than rust, for example, so we can
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# help rust outweigh JS in this calculation slightly.
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# The bonus will be applied to the logarithmic scale, as to blunt any outsized impact.
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top_100_tag_names = cached_app_wide_top_tag_names
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top_100_tag_names.index(tag.name) || (top_100_tag_names.size * 1.5)
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end
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def cached_app_wide_top_tag_names
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Rails.cache.fetch("top-100-tags") do
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Tag.order(hotness_score: :desc).limit(100).pluck(:name)
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end
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end
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end
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end
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