project-work/worker-toolkit-stocks-in-the-future/repo/app/policies/grade_book_policy.rb

# frozen_string_literal: true

class GradeBookPolicy < ApplicationPolicy
  def update?
    user_is_teacher_of_classroom? || user.admin?
  end

  def show?
    user_is_teacher_of_classroom? || user.admin?
  end

  def finalize?
    user.admin?
  end

  private

  def user_is_teacher_of_classroom?
    user.teacher? && record.classroom.teachers.include?(user)
  end
end