Initial commit

app/helpers/safe_js_object.rb

@@ -0,0 +1,14 @@
+module SafeJsObject
+  # Wraps a JSON object to be loaded as a JS object in a safe way.
+  #
+  # @example expected usage (my-template.erb), illustrated with a Visualization object
+  #   <script>
+  #     var vizdata = <%= safe_js_object vis.to_vizjson.to_json %>;
+  #   </script>
+  #
+  # @return string
+  def safe_js_object(obj)
+    # see http://api.rubyonrails.org/v3.2.21/classes/ERB/Util.html#method-c-j
+    raw "JSON.parse('#{ j(obj.html_safe) }')"
+  end
+end