1 files changed, 35 insertions, 0 deletions
diff --git a/lib/banzai/filter/issuable_state_filter.rb b/lib/banzai/filter/issuable_state_filter.rb
new file mode 100644
index 00000000000..6b78aa795b4
--- /dev/null
+++ b/lib/banzai/filter/issuable_state_filter.rb
@@ -0,0 +1,35 @@
+module Banzai
+  module Filter
+    # HTML filter that appends state information to issuable links.
+    # Runs as a post-process filter as issuable state might change whilst
+    # Markdown is in the cache.
+    #
+    # This filter supports cross-project references.
+    class IssuableStateFilter < HTML::Pipeline::Filter
+      VISIBLE_STATES = %w(closed merged).freeze
+
+      def call
+        extractor = Banzai::IssuableExtractor.new(project, current_user)
+        issuables = extractor.extract([doc])
+
+        issuables.each do |node, issuable|
+          if VISIBLE_STATES.include?(issuable.state)
+            node.children.last.content += " [#{issuable.state}]"
+          end
+        end
+
+        doc
+      end
+
+      private
+
+      def current_user
+        context[:current_user]
+      end
+
+      def project
+        context[:project]
+      end
+    end
+  end
+end