Genshin/GAKUEngine

module Gaku
  class ClassGroup < ActiveRecord::Base
    include StudentReviewable
    include Semesterable
    include Enrollable
    include Pagination
    include Notes

    validates :name, presence: true

    def self.for_select
      %w[active upcomming].map do |state|
        [state.humanize, send(state).map { |cg| [cg.to_s, cg.id] }]
      end
    end

    def self.active
      @active = joins(:semesters).merge(Gaku::Semester.active).uniq
    end

    def self.upcomming
      @upcomming = joins(:semesters).merge(Gaku::Semester.upcomming).uniq - active
    end

    def to_s
      "#{grade} - #{name}"
    end
  end
end