1 files changed, 90 insertions, 0 deletions
diff --git a/app/services/ci/queue/build_queue_service.rb b/app/services/ci/queue/build_queue_service.rb
new file mode 100644
index 00000000000..99408d529b2
--- /dev/null
+++ b/app/services/ci/queue/build_queue_service.rb
@@ -0,0 +1,90 @@
+# frozen_string_literal: true
+
+module Ci
+  module Queue
+    class BuildQueueService
+      include ::Gitlab::Utils::StrongMemoize
+
+      attr_reader :runner
+
+      def initialize(runner)
+        @runner = runner
+      end
+
+      def new_builds
+        strategy.new_builds
+      end
+
+      ##
+      # This is overridden in EE
+      #
+      def builds_for_shared_runner
+        strategy.builds_for_shared_runner
+      end
+
+      # rubocop:disable CodeReuse/ActiveRecord
+      def builds_for_group_runner
+        # Workaround for weird Rails bug, that makes `runner.groups.to_sql` to return `runner_id = NULL`
+        groups = ::Group.joins(:runner_namespaces).merge(runner.runner_namespaces)
+
+        hierarchy_groups = Gitlab::ObjectHierarchy
+          .new(groups)
+          .base_and_descendants
+
+        projects = Project.where(namespace_id: hierarchy_groups)
+          .with_group_runners_enabled
+          .with_builds_enabled
+          .without_deleted
+
+        relation = new_builds.where(project: projects)
+
+        order(relation)
+      end
+
+      def builds_for_project_runner
+        relation = new_builds
+          .where(project: runner.projects.without_deleted.with_builds_enabled)
+
+        order(relation)
+      end
+
+      def builds_queued_before(relation, time)
+        relation.queued_before(time)
+      end
+
+      def builds_for_protected_runner(relation)
+        relation.ref_protected
+      end
+
+      def builds_matching_tag_ids(relation, ids)
+        strategy.builds_matching_tag_ids(relation, ids)
+      end
+
+      def builds_with_any_tags(relation)
+        strategy.builds_with_any_tags(relation)
+      end
+
+      def order(relation)
+        strategy.order(relation)
+      end
+
+      def execute(relation)
+        strategy.build_ids(relation)
+      end
+
+      private
+
+      def strategy
+        strong_memoize(:strategy) do
+          if ::Feature.enabled?(:ci_pending_builds_queue_source, runner, default_enabled: :yaml)
+            Queue::PendingBuildsStrategy.new(runner)
+          else
+            Queue::BuildsTableStrategy.new(runner)
+          end
+        end
+      end
+    end
+  end
+end
+
+Ci::Queue::BuildQueueService.prepend_mod_with('Ci::Queue::BuildQueueService')