libr-2/app/controllers/api/v1/posts_controller.rb

class Api::V1::PostsController < ApplicationController

  skip_before_action :verify_authenticity_token
  before_action :authenticate_user_from_token
  before_action :permit_params, only: [:create]

  after_action :process_post, only: :create

  POST_TYPE = {
    :ARTICLE => 'article',
    :WEB_PAGE => 'web_page'
  }

  def create
    @post = get_post
    if @current_user.share_instances.where(sharable: @post).empty?
      share_instance = @current_user.share_instances.create sharable: @post, description: params[:description]
      render json: share_instance.to_json(include: :sharable)
    else
      render json: {message: '请勿重复分享同一资源'}, status: 409
    end
  end

  def show
  end

  def index
    render json: @current_user.share_instances.page(params[:page]), each_serializer: ShareInstanceSerializer
  end

  private

  def permit_params
    params.permit(:url, :type, :description)
  end

  def get_post
    Post.find_or_create_by!(url: params[:url], type: params[:type])
  end

  def process_post
    unless @post.processed
      ProcessPostWorker.perform_async @post.url
    end

  end
end