1 files changed, 41 insertions, 0 deletions
diff --git a/lib/banzai/filter/service_desk_upload_link_filter.rb b/lib/banzai/filter/service_desk_upload_link_filter.rb
new file mode 100644
index 00000000000..9f26dfb8ae5
--- /dev/null
+++ b/lib/banzai/filter/service_desk_upload_link_filter.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+module Banzai
+  module Filter
+    # HTML filter for service desk emails.
+    # Context options:
+    #   :replace_upload_links
+    class ServiceDeskUploadLinkFilter < BaseRelativeLinkFilter
+      def call
+        return doc unless context[:uploads_as_attachments].present?
+
+        linkable_attributes.reject! do |attr|
+          replace_upload_link(attr)
+        end
+
+        doc
+      end
+
+      protected
+
+      def replace_upload_link(html_attr)
+        return unless html_attr.name == 'href'
+        return unless html_attr.value.start_with?('/uploads/')
+
+        secret, filename_in_link = html_attr.value.scan(FileUploader::DYNAMIC_PATH_PATTERN).first
+        return unless context[:uploads_as_attachments].include?("#{secret}/#{filename_in_link}")
+
+        parent = html_attr.parent
+        filename_in_text = parent.text
+        final_filename = if filename_in_link != filename_in_text
+                           "#{filename_in_text} (#{filename_in_link})"
+                         else
+                           filename_in_text
+                         end
+
+        final_element = Nokogiri::HTML::DocumentFragment.parse("<strong>#{final_filename}</strong>")
+        parent.replace(final_element)
+      end
+    end
+  end
+end