1 files changed, 14 insertions, 0 deletions
diff --git a/app/validators/html_validator.rb b/app/validators/html_validator.rb
new file mode 100644
index 000000000..882c35d41
--- /dev/null
+++ b/app/validators/html_validator.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class HtmlValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    return if value.blank?
+    record.errors.add(attribute, I18n.t('html_validator.invalid_markup')) unless valid_html?(value)
+  end
+
+  private
+
+  def valid_html?(str)
+    Nokogiri::HTML.fragment(str).to_s == str
+  end
+end