1 files changed, 58 insertions, 0 deletions
diff --git a/lib/banzai/filter/commit_range_reference_filter.rb b/lib/banzai/filter/commit_range_reference_filter.rb
new file mode 100644
index 00000000000..e67cd45ab9b
--- /dev/null
+++ b/lib/banzai/filter/commit_range_reference_filter.rb
@@ -0,0 +1,58 @@
+require 'banzai'
+
+module Banzai
+  module Filter
+    # HTML filter that replaces commit range references with links.
+    #
+    # This filter supports cross-project references.
+    class CommitRangeReferenceFilter < AbstractReferenceFilter
+      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], $~
+        end
+      end
+
+      def self.referenced_by(node)
+        project = Project.find(node.attr("data-project")) rescue nil
+        return unless project
+
+        id = node.attr("data-commit-range")
+        range = find_object(project, id)
+
+        return unless range
+
+        { commit_range: range }
+      end
+
+      def initialize(*args)
+        super
+
+        @commit_map = {}
+      end
+
+      def self.find_object(project, id)
+        range = CommitRange.new(id, project)
+
+        range.valid_commits? ? range : nil
+      end
+
+      def find_object(*args)
+        self.class.find_object(*args)
+      end
+
+      def url_for_object(range, project)
+        h = Gitlab::Application.routes.url_helpers
+        h.namespace_project_compare_url(project.namespace, project,
+                                        range.to_param.merge(only_path: context[:only_path]))
+      end
+
+      def object_link_title(range)
+        range.reference_title
+      end
+    end
+  end
+end