Return the proper consumer class for design repositories

ee/app/models/geo/repository_updated_event.rb

@@ -24,5 +24,16 @@ module Geo
     def self.source_for(repository)
       REPOSITORY_TYPE_MAP[repository.repo_type]
     end
+
+    def consumer_klass_name
+      klass =
+        if design?
+          ::Gitlab::Geo::LogCursor::Events::DesignRepositoryUpdatedEvent
+        else
+          self.class
+        end
+
+      klass.name.demodulize
+    end
   end
 end

ee/spec/models/geo/repository_updated_event_spec.rb

@@ -11,7 +11,25 @@ RSpec.describe Geo::RepositoryUpdatedEvent, type: :model do
     it { is_expected.to validate_presence_of(:project) }
   end
 
+  describe '#consumer_klass_name' do
+    using RSpec::Parameterized::TableSyntax
+
+    where(:source, :consumer_klass_name) do
+      :design | 'DesignRepositoryUpdatedEvent'
+      :repository | 'RepositoryUpdatedEvent'
+      :wiki | 'RepositoryUpdatedEvent'
+    end
+
+    with_them do
+      it 'returns the proper consumer class name' do
+        subject.source = source
+
+        expect(subject.consumer_klass_name).to eq consumer_klass_name
+      end
+    end
+  end
+
   describe '#source' do
-    it { is_expected.to define_enum_for(:source).with([:repository, :wiki, :design]) }
+    it { is_expected.to define_enum_for(:source).with_values([:repository, :wiki, :design]) }
   end
 end