1 files changed, 31 insertions, 0 deletions
diff --git a/lib/gitlab/gfm/reference_unfolder.rb b/lib/gitlab/gfm/reference_unfolder.rb
new file mode 100644
index 00000000000..4969e8ebe85
--- /dev/null
+++ b/lib/gitlab/gfm/reference_unfolder.rb
@@ -0,0 +1,31 @@
+module Gitlab
+  module Gfm
+    ##
+    # Class than unfolds local references in text.
+    #
+    #
+    class ReferenceUnfolder
+      def initialize(text, project)
+        @text = text
+        @project = project
+      end
+
+      def unfold(from_project)
+        referables.each_with_object(@text.dup) do |referable, text|
+          next unless referable.respond_to?(:to_reference)
+
+          pattern = /#{Regexp.escape(referable.to_reference)}/
+          text.gsub!(pattern, referable.to_reference(from_project))
+        end
+      end
+
+      private
+
+      def referables
+        extractor = Gitlab::ReferenceExtractor.new(@project)
+        extractor.analyze(@text)
+        extractor.all
+      end
+    end
+  end
+end