add json view of story, including comments

for issue #42

app/controllers/stories_controller.rb

@@ -114,10 +114,20 @@ class StoriesController < ApplicationController
     @short_url = @story.short_id_url
 
     @comments = Comment.ordered_for_story_or_thread_for_user(@story.id, nil,
-      @user ? @user : nil)
-    @comment = Comment.new
+      @user)
 
-    load_user_votes
+    respond_to do |format|
+      format.html {
+        @comment = Comment.new
+
+        load_user_votes
+
+        render :action => "show"
+      }
+      format.json {
+        render :json => @story.as_json(:with_comments => @comments)
+      }
+    end
   end
 
   def show_comment

app/models/comment.rb

@@ -59,6 +59,28 @@ class Comment < ActiveRecord::Base
 
     nil
   end
+  
+  def as_json(options = {})
+    h = super(:only => [
+      :short_id,
+      :created_at,
+      :updated_at,
+      :is_deleted,
+      :is_moderated,
+    ])
+    h[:score] = score
+
+    if self.is_gone?
+      h[:comment] = "<em>#{self.gone_text}</em>"
+    else
+      h[:comment] = markeddown_comment
+    end
+
+    h[:url] = url
+    h[:indent_level] = indent_level
+    h[:commenting_user] = user
+    h
+  end
 
   def assign_short_id_and_upvote
     10.times do |try|

app/models/story.rb

@@ -113,12 +113,17 @@ class Story < ActiveRecord::Base
       :created_at,
       :title,
       :url,
-      :comments_url,
     ])
     h[:score] = score
     h[:comment_count] = comment_count
     h[:description] = markeddown_description
+    h[:comments_url] = comments_url
     h[:submitter_user] = user
+
+    if options && options[:with_comments]
+      h[:comments] = options[:with_comments]
+    end
+
     h
   end