class PostTiming < ActiveRecord::Base belongs_to :topic belongs_to :user validates_presence_of :post_number validates_presence_of :msecs def self.pretend_read(topic_id, actual_read_post_number, pretend_read_post_number) # This is done in SQL cause the logic is quite tricky and we want to do this in one db hit # exec_sql("INSERT INTO post_timings(topic_id, user_id, post_number, msecs) SELECT :topic_id, user_id, :pretend_read_post_number, 1 FROM post_timings pt WHERE topic_id = :topic_id AND post_number = :actual_read_post_number AND NOT EXISTS ( SELECT 1 FROM post_timings pt1 WHERE pt1.topic_id = pt.topic_id AND pt1.post_number = :pretend_read_post_number AND pt1.user_id = pt.user_id ) ", pretend_read_post_number: pretend_read_post_number, topic_id: topic_id, actual_read_post_number: actual_read_post_number ) TopicUser.ensure_consistency!(topic_id) end # Increases a timer if a row exists, otherwise create it def self.record_timing(args) rows = exec_sql_row_count("UPDATE post_timings SET msecs = msecs + :msecs WHERE topic_id = :topic_id AND user_id = :user_id AND post_number = :post_number", args) if rows == 0 Post.where(['topic_id = :topic_id and post_number = :post_number', args]).update_all 'reads = reads + 1' exec_sql("INSERT INTO post_timings (topic_id, user_id, post_number, msecs) SELECT :topic_id, :user_id, :post_number, :msecs WHERE NOT EXISTS(SELECT 1 FROM post_timings WHERE topic_id = :topic_id AND user_id = :user_id AND post_number = :post_number)", args) end end def self.destroy_for(user_id, topic_id) PostTiming.transaction do PostTiming.delete_all(['user_id = ? and topic_id = ?', user_id, topic_id]) TopicUser.delete_all(['user_id = ? and topic_id = ?', user_id, topic_id]) end end def self.process_timings(current_user, topic_id, topic_time, timings) current_user.user_stat.update_time_read! highest_seen = 1 timings.each do |post_number, time| if post_number >= 0 PostTiming.record_timing(topic_id: topic_id, post_number: post_number, user_id: current_user.id, msecs: time) highest_seen = post_number.to_i > highest_seen ? post_number.to_i : highest_seen end end total_changed = 0 if timings.length > 0 total_changed = Notification.mark_posts_read(current_user, topic_id, timings.map{|t| t[0]}) end TopicUser.update_last_read(current_user, topic_id, highest_seen, topic_time) if total_changed > 0 current_user.reload current_user.publish_notifications_state end end end # == Schema Information # # Table name: post_timings # # topic_id :integer not null # post_number :integer not null # user_id :integer not null # msecs :integer not null # # Indexes # # post_timings_summary (topic_id,post_number) # post_timings_unique (topic_id,post_number,user_id) UNIQUE #