educoder/app/controllers/live_links_controller.rb

class LiveLinksController < ApplicationController
  before_action :require_login
  before_action :find_course, only: [:index, :create]
  before_action :user_course_identity, :teacher_allowed, only: [:create]

  def index
    lives = @course.live_links.order("id desc")
    @total_count = lives.size
    @lives = paginate lives.includes(user: :user_extension)
  end

  def create
    @course.live_links.create!( create_params.merge(user_id: current_user.id))
    render_ok
  end

  def update
    tip_exception(403, "无权限操作") unless current_user.id == current_live.user_id || current_user.admin?
    tip_exception("请勿重复开启") if current_live.on_status && params[:on_status].to_i == 1

    ActiveRecord::Base.transaction do
      current_live.update!(on_status: params[:on_status])

      # 开启时发送消息，关闭直播时删除对应的消息
      if params[:on_status].to_i == 1
        LivePublishJob.perform_later(current_live.id)
      else
        current_live.tidings.destroy_all
      end
    end
    render_ok
  end

  private

  def create_params
    params.permit(:url, :description)
  end

  def current_live
    @_current_live = LiveLink.find params[:id]
  end
end