Refactor legacy finder to find verified registries

These changes use the new finder when FDW is enabled without selective
sync to avoid code duplication.

ee/app/finders/geo/legacy_project_registry_verified_finder.rb

 # frozen_string_literal: true
 
 # Finder for retrieving project registries that have been verified
-# scoped to a type (repository or wiki) using cross-database joins
-# for selective sync.
+# scoped to a type (repository or wiki) using cross-database joins.
 #
 # Basic usage:
 #
@@ -22,30 +21,16 @@ module Geo
     end
 
     def execute
-      if selective_sync?
-        verified_registries_for_selective_sync
-      else
-        verified_registries
-      end
-    end
-
-    private
-
-    attr_reader :type
-
-    def verified_registries
-      Geo::ProjectRegistry.verified(type)
-    end
-
-    # rubocop: disable CodeReuse/ActiveRecord
-    def verified_registries_for_selective_sync
       legacy_inner_join_registry_ids(
-        verified_registries,
-        current_node.projects.pluck(:id),
+        Geo::ProjectRegistry.verified(type),
+        current_node.projects.pluck_primary_key,
         Geo::ProjectRegistry,
         foreign_key: :project_id
       )
     end
-    # rubocop: enable CodeReuse/ActiveRecord
+
+    private
+
+    attr_reader :type
   end
 end

ee/app/finders/geo/project_registry_finder.rb

@@ -196,10 +196,10 @@ module Geo
     end
 
     def finder_klass_for_verified_registries
-      if Gitlab::Geo::Fdw.enabled_for_selective_sync?
-        Geo::ProjectRegistryVerifiedFinder
-      else
+      if !Gitlab::Geo::Fdw.enabled? || use_legacy_queries_for_selective_sync?
         Geo::LegacyProjectRegistryVerifiedFinder
+      else
+        Geo::ProjectRegistryVerifiedFinder
       end
     end
 

ee/spec/finders/geo/legacy_project_registry_verified_finder_spec.rb

@@ -22,7 +22,10 @@ describe Geo::LegacyProjectRegistryVerifiedFinder, :geo do
     let!(:registry_wiki_verification_failed_broken_shard) { create(:geo_project_registry, :repository_verified, :wiki_verification_failed, project: project_4) }
     let!(:registry_verification_failed) { create(:geo_project_registry, :repository_verification_failed, :wiki_verification_failed) }
 
-    shared_examples 'finds verified registries' do
+    before do
+      stub_fdw_disabled
+    end
+
     context 'with repository type' do
       subject { described_class.new(current_node: node, type: :repository) }
 
@@ -83,23 +86,4 @@ describe Geo::LegacyProjectRegistryVerifiedFinder, :geo do
       end
     end
   end
-
-    # Disable transactions via :delete method because a foreign table
-    # can't see changes inside a transaction of a different connection.
-    context 'FDW', :delete do
-      before do
-        skip('FDW is not configured') unless Gitlab::Geo::Fdw.enabled?
-      end
-
-      include_examples 'finds verified registries'
-    end
-
-    context 'Legacy' do
-      before do
-        stub_fdw_disabled
-      end
-
-      include_examples 'finds verified registries'
-    end
-  end
 end

ee/spec/finders/geo/project_registry_finder_spec.rb

@@ -148,22 +148,72 @@ describe Geo::ProjectRegistryFinder, :geo do
     end
 
     describe '#count_verified_repositories' do
-      it 'counts projects that verified' do
-        create(:geo_project_registry, :repository_verified, project: project_repository_verified)
-        create(:geo_project_registry, :repository_verified, project: build(:project))
-        create(:geo_project_registry, :repository_verification_failed, project: project_repository_verification_failed)
+      before do
+        project_1_in_synced_group = create(:project, group: synced_group)
+        project_2_in_synced_group = create(:project, group: synced_group)
+        project_3_in_synced_group = create(:project, group: synced_group)
+        project_4_broken_storage = create(:project, :broken_storage)
+
+        create(:geo_project_registry, :repository_verified, :wiki_verified, project: project_synced)
+        create(:geo_project_registry, :repository_verified, project: project_1_in_synced_group)
+        create(:geo_project_registry, :repository_verification_failed, project: project_3_in_synced_group)
+        create(:geo_project_registry, :repository_verified, project: project_4_broken_storage)
+        create(:geo_project_registry, :wiki_verified, project: project_2_in_synced_group)
+      end
 
-        expect(subject.count_verified_repositories).to eq 2
+      it 'counts registries that repository have beend verified' do
+        expect(subject.count_verified_repositories).to eq 3
+      end
+
+      context 'with selective sync by namespace' do
+        it 'counts registries that repository have beend verified where projects belongs to the namespaces' do
+          secondary.update!(selective_sync_type: 'namespaces', namespaces: [synced_group])
+
+          expect(subject.count_verified_repositories).to eq 1
+        end
+      end
+
+      context 'with selective sync by shard' do
+        it 'counts registries that repository have beend verified where projects belongs to the shards' do
+          secondary.update!(selective_sync_type: 'shards', selective_sync_shards: ['broken'])
+
+          expect(subject.count_verified_repositories).to eq 1
+        end
       end
     end
 
     describe '#count_verified_wikis' do
-      it 'counts wikis that verified' do
-        create(:geo_project_registry, :wiki_verified, project: project_wiki_verified)
-        create(:geo_project_registry, :wiki_verified, project: build(:project))
-        create(:geo_project_registry, :wiki_verification_failed, project: project_wiki_verification_failed)
+      before do
+        project_1_in_synced_group = create(:project, group: synced_group)
+        project_2_in_synced_group = create(:project, group: synced_group)
+        project_3_in_synced_group = create(:project, group: synced_group)
+        project_4_broken_storage = create(:project, :broken_storage)
+
+        create(:geo_project_registry, :wiki_verified, :wiki_verified, project: project_synced)
+        create(:geo_project_registry, :wiki_verified, project: project_1_in_synced_group)
+        create(:geo_project_registry, :wiki_verification_failed, project: project_3_in_synced_group)
+        create(:geo_project_registry, :wiki_verified, project: project_4_broken_storage)
+        create(:geo_project_registry, :repository_verified, project: project_2_in_synced_group)
+      end
 
-        expect(subject.count_verified_wikis).to eq 2
+      it 'counts registries that wiki have beend verified' do
+        expect(subject.count_verified_wikis).to eq 3
+      end
+
+      context 'with selective sync by namespace' do
+        it 'counts registries that wiki have beend verified where projects belongs to the namespaces' do
+          secondary.update!(selective_sync_type: 'namespaces', namespaces: [synced_group])
+
+          expect(subject.count_verified_wikis).to eq 1
+        end
+      end
+
+      context 'with selective sync by shard' do
+        it 'counts registries that wiki have beend verified where projects belongs to the shards' do
+          secondary.update!(selective_sync_type: 'shards', selective_sync_shards: ['broken'])
+
+          expect(subject.count_verified_wikis).to eq 1
+        end
       end
     end