Add custom scrubber for QuillJs

app/utilities/protocols_importer.rb

@@ -1,4 +1,5 @@
 module ProtocolsImporter
+  require 'scrubbers/quill_js_scrubber'
   include RenamingUtil
 
   def import_new_protocol(protocol_json, organization, type, user)
@@ -54,7 +55,10 @@ module ProtocolsImporter
       step = Step.create!(
         name: step_json["name"],
         description: # Sanitize description HTML
-          ActionController::Base.helpers.sanitize(step_json['description']),
+          ActionController::Base.helpers.sanitize(
+            step_json['description'],
+            scrubber: QuillJsScrubber.new
+          ),
         position: step_pos,
         completed: false,
         user: user,

app/utilities/scrubbers/quill_js_scrubber.rb

@@ -0,0 +1,11 @@
+class QuillJsScrubber < Rails::Html::PermitScrubber
+  def initialize
+    super
+    self.tags = %w(h1 span p br pre ul li strong em u sub sup s a blockquote ol)
+    self.attributes = %w(style class spellcheck href target)
+  end
+
+  def skip_node?(node)
+    node.text?
+  end
+end