comments: use server-side quote-stripping instead of reimplementing in js.

app/assets/javascripts/comments.js

@@ -18,22 +18,6 @@
     }
   }
 
-  Danbooru.Comment.quote_message = function(data) {
-    var blocks = data["body"].match(/\[\/?quote\]|.|\n|\r/gm);
-    var n = 0;
-    var stripped_body = "";
-    $.each(blocks, function(i, block) {
-      if (block === "[quote]") {
-        n += 1;
-      } else if (block == "[/quote]") {
-        n -= 1;
-      } else if (n === 0) {
-        stripped_body += block;
-      }
-    });
-    return "[quote]\n" + data["creator_name"] + " said:\n\n" + stripped_body + "\n[/quote]\n\n";
-  }
-
   Danbooru.Comment.quote = function(e) {
     $.get(
       "/comments/" + $(e.target).data('comment-id') + ".json",
@@ -41,7 +25,7 @@
         var $link = $(e.target);
         var $div = $link.closest("div.comments-for-post").find(".new-comment");
         var $textarea = $div.find("textarea");
-        var msg = Danbooru.Comment.quote_message(data);
+        var msg = data["quoted_response"];
         if ($textarea.val().length > 0) {
           msg = $textarea.val() + "\n\n" + msg;
         }

app/controllers/comments_controller.rb

@@ -48,7 +48,7 @@ class CommentsController < ApplicationController
 
   def show
     @comment = Comment.find(params[:id])
-    respond_with(@comment)
+    respond_with(@comment, methods: [:quoted_response])
   end
 
   def destroy

app/logical/d_text.rb

@@ -12,6 +12,11 @@ class DText
     CGI.escapeHTML(string)
   end
 
+  def self.quote(message, creator_name)
+    stripped_body = DText.strip_blocks(message, "quote")
+    "[quote]\n#{creator_name} said:\n\n#{stripped_body}\n[/quote]\n\n"
+  end
+
   def self.strip_blocks(string, tag)
     n = 0
     stripped = ""

app/models/comment.rb

@@ -249,6 +249,10 @@ class Comment < ActiveRecord::Base
   def undelete!
     update({ :is_deleted => false }, :as => CurrentUser.role)
   end
+
+  def quoted_response
+    DText.quote(body, creator_name)
+  end
 end
 
 Comment.connection.extend(PostgresExtensions)

app/models/forum_post.rb

@@ -234,8 +234,7 @@ class ForumPost < ActiveRecord::Base
   end
 
   def quoted_response
-    stripped_body = DText.strip_blocks(body, "quote")
-    "[quote]\n#{creator_name} said:\n\n#{stripped_body}\n[/quote]\n\n"
+    DText.quote(body, creator_name)
   end
 
   def forum_topic_page