class InstructorsController < ApplicationController
  before_action :set_instructor, only: [:show]

  def index
    @instructors = Instructor.all
  end

  def show
    sections = CourseSection.where instructor: @instructor
    sections = sections.select do |s|
      s.course.semester == @semester
    end

    # TODO: move this to a model somewhere
    @courses = [].to_set
    sections.each do |s|
      @courses.add s.course
    end
  end

  private

  def set_instructor
    @instructor = Instructor.find_by_id params[:id]
  end
end