module Mobile
  module Entities
    class CourseDynamic < Grape::Entity
      include Redmine::I18n
      def self.course_dynamic_expose(field)
        expose field do |c,opt|
          if field == :update_time
            (format_time(c[field]) if (c.is_a?(Hash) && c.key?(field)))
          elsif field == :news_count
            obj  =  nil
            c[:dynamics].each do |d|
              if d[:type] == 1
                obj =  d[:count]
              end
            end
            obj
          elsif field == :document_count
            obj = nil
            c[:dynamics].each do |d|
              if d[:type] == 3
                obj = d[:count]
              end
            end
            obj
          elsif field == :topic_count
            obj  =  nil
            c[:dynamics].each do |d|
              if d[:type] == 2
                obj =  d[:count]
              end
            end
            obj
          elsif field == :homework_count
            obj  =  nil
            c[:dynamics].each do |d|
              if d[:type] == 4
                obj =  d[:count]
              end
            end
            obj
          else
            c[field] if (c.is_a?(Hash) && c.key?(field))
          end

        end
      end
      course_dynamic_expose :type
      course_dynamic_expose :count
      course_dynamic_expose :course_name
      course_dynamic_expose :course_term
      course_dynamic_expose :course_time
      course_dynamic_expose :course_id
      course_dynamic_expose :course_img_url
      course_dynamic_expose :message
      course_dynamic_expose :update_time
      course_dynamic_expose :count
      course_dynamic_expose :news_count
      course_dynamic_expose :document_count
      course_dynamic_expose :topic_count
      course_dynamic_expose :homework_count
      #在dynamics里解析出四种动态
      expose :documents,using:Mobile::Entities::Attachment do |f,opt|
        obj = nil
        f[:dynamics].each do |d|
          if d[:type] == 3
            obj = d[:documents]
          end
        end
        obj
      end
      expose :topics,using:Mobile::Entities::Message do |f,opt|
        obj  =  nil
        f[:dynamics].each do |d|
          if d[:type] == 2
           obj =  d[:topics]
          end
        end
        obj
      end
      expose :homeworks,using:Mobile::Entities::Homework do |f,opt|
        obj  =  nil
        f[:dynamics].each do |d|
          if d[:type] == 4
            obj =  d[:homeworks]
          end
        end
        obj
      end

      expose :news,using:Mobile::Entities::News do |f,opt|
        obj  =  nil
        f[:dynamics].each do |d|
          if d[:type] == 1
            obj =  d[:news]
          end
        end
        obj
      end

      expose :better_students,using:Mobile::Entities::User do |f,opt|
        obj = nil
        f[:dynamics].each do |d|
          if d[:type] == 6
            obj =  d[:better_students]
          end
        end
        obj
      end

    end
  end
end