98 lines
2.8 KiB
Ruby
98 lines
2.8 KiB
Ruby
class TopTopic < ActiveRecord::Base
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belongs_to :topic
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def self.periods
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@periods ||= [:yearly, :monthly, :weekly, :daily]
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end
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def self.sort_orders
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@sort_orders ||= [:posts, :views, :likes]
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end
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def self.refresh!
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transaction do
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# clean up the table
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exec_sql("DELETE FROM top_topics")
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# insert the list of all the visible topics
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exec_sql("INSERT INTO top_topics (topic_id)
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SELECT id
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FROM topics
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WHERE deleted_at IS NULL
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AND visible
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AND archetype <> :private_message
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AND NOT archived",
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private_message: Archetype::private_message)
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TopTopic.periods.each do |period|
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# update all the counter caches
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TopTopic.sort_orders.each do |sort|
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TopTopic.send("update_#{sort}_count_for", period)
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end
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# compute top score
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TopTopic.compute_top_score_for(period)
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end
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end
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end
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def self.update_posts_count_for(period)
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sql = "SELECT topic_id, GREATEST(COUNT(*), 1) AS count
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FROM posts
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WHERE created_at >= :from
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AND deleted_at IS NULL
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AND NOT hidden
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AND post_type = #{Post.types[:regular]}
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AND user_id <> #{Discourse.system_user.id}
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GROUP BY topic_id"
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TopTopic.update_top_topics(period, "posts", sql)
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end
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def self.update_views_count_for(period)
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sql = "SELECT parent_id as topic_id, COUNT(*) AS count
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FROM views
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WHERE viewed_at >= :from
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GROUP BY topic_id"
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TopTopic.update_top_topics(period, "views", sql)
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end
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def self.update_likes_count_for(period)
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sql = "SELECT topic_id, GREATEST(SUM(like_count), 1) AS count
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FROM posts
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WHERE created_at >= :from
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AND deleted_at IS NULL
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AND NOT hidden
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GROUP BY topic_id"
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TopTopic.update_top_topics(period, "likes", sql)
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end
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def self.compute_top_score_for(period)
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# log(views) + (posts * likes)
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exec_sql("UPDATE top_topics
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SET #{period}_score = CASE
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WHEN #{period}_views_count = 0 THEN 0
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ELSE log(#{period}_views_count) + (#{period}_posts_count * #{period}_likes_count)
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END")
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end
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def self.start_of(period)
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case period
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when :yearly then 1.year.ago
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when :monthly then 1.month.ago
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when :weekly then 1.week.ago
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when :daily then 1.day.ago
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end
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end
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def self.update_top_topics(period, sort, inner_join)
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exec_sql("UPDATE top_topics
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SET #{period}_#{sort}_count = c.count
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FROM top_topics tt
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INNER JOIN (#{inner_join}) c ON tt.topic_id = c.topic_id
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WHERE tt.topic_id = top_topics.topic_id", from: start_of(period))
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end
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end
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