1 files changed, 48 insertions, 0 deletions
diff --git a/lib/banzai/filter/references/commit_range_reference_filter.rb b/lib/banzai/filter/references/commit_range_reference_filter.rb
new file mode 100644
index 00000000000..ad79f8a173c
--- /dev/null
+++ b/lib/banzai/filter/references/commit_range_reference_filter.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+module Banzai
+  module Filter
+    module References
+      # HTML filter that replaces commit range references with links.
+      #
+      # This filter supports cross-project references.
+      class CommitRangeReferenceFilter < AbstractReferenceFilter
+        self.reference_type = :commit_range
+
+        def self.object_class
+          CommitRange
+        end
+
+        def self.references_in(text, pattern = CommitRange.reference_pattern)
+          text.gsub(pattern) do |match|
+            yield match, $~[:commit_range], $~[:project], $~[:namespace], $~
+          end
+        end
+
+        def initialize(*args)
+          super
+
+          @commit_map = {}
+        end
+
+        def find_object(project, id)
+          return unless project.is_a?(Project)
+
+          range = CommitRange.new(id, project)
+
+          range.valid_commits? ? range : nil
+        end
+
+        def url_for_object(range, project)
+          h = Gitlab::Routing.url_helpers
+          h.project_compare_url(project,
+                                          range.to_param.merge(only_path: context[:only_path]))
+        end
+
+        def object_link_title(range, matches)
+          nil
+        end
+      end
+    end
+  end
+end