sqm-dashboards/app/presenters/subcategory_presenter.rb

class SubcategoryPresenter
  def initialize(subcategory:, academic_year:, school:)
    @subcategory = subcategory
    @academic_year = academic_year
    @school = school
  end

  def name
    @subcategory.name
  end

  def gauge_presenter
    average_score = SurveyItemResponse.for_measures(measures)
      .where(academic_year: @academic_year, school: @school)
      .average(:likert_score)

    GaugePresenter.new(scale: scale, score: average_score)
  end

  private

  def scale
    Scale.new(
      watch_low_benchmark: measures.map(&:watch_low_benchmark).average,
      growth_low_benchmark: measures.map(&:growth_low_benchmark).average,
      approval_low_benchmark: measures.map(&:approval_low_benchmark).average,
      ideal_low_benchmark: measures.map(&:ideal_low_benchmark).average,
    )
  end

  def measures
    @measures ||= @subcategory.measures
  end
end