PERF: move 3 more option columns out of the user table

app/models/user_option.rb

@@ -3,6 +3,8 @@ class UserOption < ActiveRecord::Base
   belongs_to :user
   before_create :set_defaults
 
+  after_save :update_tracked_topics
+
   def set_defaults
     self.email_always = SiteSetting.default_email_always
     self.mailing_list_mode = SiteSetting.default_email_mailing_list_mode
@@ -16,6 +18,9 @@ class UserOption < ActiveRecord::Base
     self.disable_jump_reply = SiteSetting.default_other_disable_jump_reply
     self.edit_history_public = SiteSetting.default_other_edit_history_public
 
+    self.new_topic_duration_minutes = SiteSetting.default_other_new_topic_duration_minutes
+    self.auto_track_topics_after_msecs = SiteSetting.default_other_auto_track_topics_after_msecs
+
 
     if SiteSetting.default_email_digest_frequency.to_i <= 0
       self.email_digests = false
@@ -26,4 +31,70 @@ class UserOption < ActiveRecord::Base
 
     true
   end
+
+  def update_tracked_topics
+    return unless auto_track_topics_after_msecs_changed?
+    TrackedTopicsUpdater.new(id, auto_track_topics_after_msecs).call
+  end
+
+  def redirected_to_top_yet?
+    last_redirected_to_top_at.present?
+  end
+
+  def update_last_redirected_to_top!
+    key = "user:#{id}:update_last_redirected_to_top"
+    delay = SiteSetting.active_user_rate_limit_secs
+
+    # only update last_redirected_to_top_at once every minute
+    return unless $redis.setnx(key, "1")
+    $redis.expire(key, delay)
+
+    # delay the update
+    Jobs.enqueue_in(delay / 2, :update_top_redirection, user_id: self.id, redirected_at: Time.zone.now)
+  end
+
+  def should_be_redirected_to_top
+    redirected_to_top.present?
+  end
+
+  def redirected_to_top
+    # redirect is enabled
+    return unless SiteSetting.redirect_users_to_top_page
+    # top must be in the top_menu
+    return unless SiteSetting.top_menu =~ /(^|\|)top(\||$)/i
+    # not enough topics
+    return unless period = SiteSetting.min_redirected_to_top_period
+
+    if !user.seen_before? || (user.trust_level == 0 && !redirected_to_top_yet?)
+      update_last_redirected_to_top!
+      return {
+        reason: I18n.t('redirected_to_top_reasons.new_user'),
+        period: period
+      }
+    elsif user.last_seen_at < 1.month.ago
+      update_last_redirected_to_top!
+      return {
+        reason: I18n.t('redirected_to_top_reasons.not_seen_in_a_month'),
+        period: period
+      }
+    end
+
+    # don't redirect to top
+    nil
+  end
+
+  def treat_as_new_topic_start_date
+    duration = new_topic_duration_minutes || SiteSetting.default_other_new_topic_duration_minutes.to_i
+    times = [case duration
+      when User::NewTopicDuration::ALWAYS
+        user.created_at
+      when User::NewTopicDuration::LAST_VISIT
+        user.previous_visit_at || user.user_stat.new_since
+      else
+        duration.minutes.ago
+    end, user.user_stat.new_since, Time.at(SiteSetting.min_new_topics_time).to_datetime]
+
+    times.max
+  end
+
 end