# frozen_string_literal: true

module Gitlab
  module Ci
    module Pipeline
      module Chain
        class Populate < Chain::Base
          include Chain::Helpers

          PopulateError = Class.new(StandardError)

          def perform!
            raise ArgumentError, 'missing stage seeds' unless @command.stage_seeds

            ##
            # Populate pipeline with all stages, and stages with builds.
            #
            pipeline.stages = @command.stage_seeds.map(&:to_resource)

            if pipeline.stages.none?
              return error('No stages / jobs for this pipeline.')
            end

            if pipeline.invalid?
              return error('Failed to build the pipeline!')
            end

            raise Populate::PopulateError if pipeline.persisted?
          end

          def break?
            pipeline.errors.any?
          end
        end
      end
    end
  end
end