From 606f5c9849db4ad6413fbaf3090db8d7ee41a8f1 Mon Sep 17 00:00:00 2001
From: joshua stein <jcs@jcs.org>
Date: Tue, 9 Dec 2014 10:07:36 -0600
Subject: [PATCH] experiment with factoring comment scores into story hotness

might keep an active story alive on the front page and bury a story
with a "comment graveyard"
---
 app/models/comment.rb | 2 ++
 app/models/story.rb   | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/app/models/comment.rb b/app/models/comment.rb
index b689f00..d59a4a4 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -250,6 +250,8 @@ class Comment < ActiveRecord::Base
       "downvotes = COALESCE(downvotes, 0) + #{downvote.to_i}, " <<
       "confidence = '#{self.calculated_confidence}' WHERE id = " <<
       "#{self.id.to_i}")
+
+    self.story.recalculate_hotness!
   end
 
   def gone_text
diff --git a/app/models/story.rb b/app/models/story.rb
index a2e2323..4d6e781 100644
--- a/app/models/story.rb
+++ b/app/models/story.rb
@@ -138,10 +138,12 @@ class Story < ActiveRecord::Base
     end
 
     # prevent the submitter's own comments from affecting the score
-    ccount = self.comments.where("user_id != ?", self.user_id).count
+    cpoints = self.comments.where("user_id <> ?",
+      self.user_id).select(:upvotes, :downvotes).map{|c|
+      c.upvotes - c.downvotes }.inject(&:+).to_i
 
     # don't immediately kill stories at 0 by bumping up score by one
-    order = Math.log([ (score + 1).abs + ccount, 1 ].max, base)
+    order = Math.log([ (score + 1).abs + cpoints, 1 ].max, base)
     if score > 0
       sign = 1
     elsif score < 0