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path: root/app/services/clusters/applications/check_upgrade_progress_service.rb
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# frozen_string_literal: true

module Clusters
  module Applications
    class CheckUpgradeProgressService < BaseHelmService
      def execute
        return unless app.updating?

        case phase
        when ::Gitlab::Kubernetes::Pod::SUCCEEDED
          on_success
        when ::Gitlab::Kubernetes::Pod::FAILED
          on_failed
        else
          check_timeout
        end
      rescue ::Kubeclient::HttpError => e
        app.make_update_errored!("Kubernetes error: #{e.message}") unless app.update_errored?
      end

      private

      def on_success
        app.make_installed!
      ensure
        remove_pod
      end

      def on_failed
        app.make_update_errored!(errors || 'Update silently failed')
      ensure
        remove_pod
      end

      def check_timeout
        if timed_out?
          begin
            app.make_update_errored!('Update timed out')
          ensure
            remove_pod
          end
        else
          ::ClusterWaitForAppUpdateWorker.perform_in(
            ::ClusterWaitForAppUpdateWorker::INTERVAL, app.name, app.id)
        end
      end

      def timed_out?
        Time.now.utc - app.updated_at.to_time.utc > ::ClusterWaitForAppUpdateWorker::TIMEOUT
      end

      def remove_pod
        helm_api.delete_pod!(pod_name)
      rescue
        # no-op
      end

      def phase
        helm_api.status(pod_name)
      end

      def errors
        helm_api.log(pod_name)
      end

      def pod_name
        @pod_name ||= patch_command.pod_name
      end
    end
  end
end