Option to supress replies button below a post, when its reply is directly following.

app/assets/javascripts/discourse/models/post.js.coffee.erb

@@ -173,6 +173,27 @@ window.Discourse.Post = Ember.Object.extend Discourse.Presence,
   loadVersions: (callback) ->
     $.get "/posts/#{@get('id')}/versions.json", (result) -> callback(result)  
 
+
+  # Whether to show replies directly below 
+  showRepliesBelow: (->
+    reply_count = @get('reply_count')
+
+    # We don't show replies if there aren't any
+    return false if reply_count is 0
+
+    # Always show replies if the setting `supress_reply_directly_below` is false.
+    return true unless Discourse.SiteSettings.supress_reply_directly_below
+
+    # Always show replies if there's more than one
+    return true if reply_count > 1
+    
+    # If we have *exactly* one reply, we have to consider if it's directly below us
+    return false if @get('topic')?.isReplyDirectlyBelow(@)
+
+    true
+
+  ).property('reply_count')
+
 window.Discourse.Post.reopenClass
 
   REGULAR_TYPE: <%= Post::REGULAR %>

app/assets/javascripts/discourse/models/topic.js.coffee

@@ -243,6 +243,18 @@ Discourse.Topic = Discourse.Model.extend Discourse.Presence,
     newPosts.each (p)->
       posts.pushObject(p) unless map[p.get('post_number')]
 
+  # Is the reply to a post directly below it?
+  isReplyDirectlyBelow: (post) ->
+    posts = @get('posts')
+    return unless posts
+
+    postBelow = posts[posts.indexOf(post) + 1]
+
+    # If the post directly below's reply_to_post_number is our post number, it's
+    # considered directly below.
+    return postBelow?.get('reply_to_post_number') is post.get('post_number')
+
+
 window.Discourse.Topic.reopenClass
 
   NotificationLevel:

app/assets/javascripts/discourse/views/post_menu_view.js.coffee

@@ -26,15 +26,13 @@ window.Discourse.PostMenuView = Ember.View.extend Discourse.Presence,
   # Trigger re rendering
   needsToRender: (->
     @rerender()
-  ).observes('post.deleted_at', 'post.flagsAvailable.@each', 'post.url', 'post.bookmarked', 'post.reply_count', 'post.can_delete')
+  ).observes('post.deleted_at', 'post.flagsAvailable.@each', 'post.url', 'post.bookmarked', 'post.reply_count', 'post.showRepliesBelow', 'post.can_delete')
 
   # Replies Button
   renderReplies: (post, buffer) ->
 
-    return if @get('post.replyFollowing')
-
+    return unless post.get('showRepliesBelow')
     reply_count = post.get('reply_count')
-    return if reply_count == 0
 
     buffer.push("<button class='show-replies' data-action='replies'>")
     buffer.push("<span class='badge-posts'>#{reply_count}</span>")
@@ -97,7 +95,6 @@ window.Discourse.PostMenuView = Ember.View.extend Discourse.Presence,
 
   clickReply: -> @get('controller').replyToPost(@get('post'))
 
-
   # Bookmark button
   renderBookmark: (post, buffer) ->
     return unless Discourse.get('currentUser')

app/models/site_setting.rb

@@ -29,6 +29,7 @@ class SiteSetting < ActiveRecord::Base
   client_setting(:min_topic_title_length, 5)
   client_setting(:max_topic_title_length, 255)
   client_setting(:flush_timings_secs, 5)
+  client_setting(:supress_reply_directly_below, true)
 
   # settings only available server side
   setting(:auto_track_topics_after, 60000)
@@ -136,6 +137,8 @@ class SiteSetting < ActiveRecord::Base
   # Ways to catch griefers and other nasties
   setting(:email_blacklist_regexp, '')
 
+
+
   def self.call_mothership?
     self.enforce_global_nicknames? and self.discourse_org_access_key.present?
   end

config/locales/en.yml

@@ -259,7 +259,7 @@ en:
     posts_per_page: "How many posts are returned on a topic page"
     system_username: "Username that sends system messages"
     send_welcome_message: "Do new users get a welcome private message?"
-    
+    supress_reply_directly_below: "Don't show replies button below a post when the reply is directly below"
     allow_index_in_robots_txt: "Site should be indexed by search engines (update robots.txt)"
 
     port: "If you'd like to specify a port in the URL. Useful in development mode. Leave blank for none."