socialforge/app/api/mobile/apis/activities.rb

#coding=utf-8

module Mobile
  module Apis
    class Activities< Grape::API
      resources :activities do

        desc "get user activities"

        params do
          requires :page, type: Integer
          requires :openid, type: String
        end
        post do
          authenticate!

          user = current_user

          shield_project_ids = ShieldActivity.select("shield_id").where("container_type='User' and container_id=#{user.id} and shield_type='Project'").map(&:shield_id)
          shield_course_ids = ShieldActivity.select("shield_id").where("container_type='User' and container_id=#{user.id} and shield_type='Course'").map(&:shield_id)
          page = params[:page] ? params[:page] : 0
          user_project_ids = (user.projects.where("status = 1").map{|project| project.id}-shield_project_ids).empty? ? "(-1)" : "(" + (user.projects.where("status = 1").map{|project| project.id}-shield_project_ids).join(",") + ")"
          user_course_ids = (user.courses.where("is_delete = 0").map{|course| course.id}-shield_course_ids).empty? ? "(-1)" : "(" + (user.courses.where("is_delete = 0").map{|course| course.id}-shield_course_ids).join(",") + ")"
          course_types = "('Message','News','HomeworkCommon','Poll','Course')"
          project_types = "('Message','Issue','Project')"
          principal_types = "JournalsForMessage"
          watched_user_ids = User.watched_by(user.id).count == 0 ? " " : ("," + User.watched_by(user.id).map{|u| u.id.to_s }.join(','))
          user_ids = "(" + user.id.to_s + watched_user_ids + ")"
          watched_user_blog_ids = Blog.select("id").where("author_id in #{user_ids}").count == 0 ? " " :Blog.select("id").where("author_id in #{user_ids}").map { |blog| blog.id}.join(",")
          blog_ids = "(" + watched_user_blog_ids + ")"

          activities = UserActivity.where("(container_type = 'Project' and container_id in #{user_project_ids} and act_type in #{project_types})" +
                                                    "or (container_type = 'Course' and container_id in #{user_course_ids} and act_type in #{course_types}) "+
                                                    "or (container_type = 'Principal' and act_type= '#{principal_types}' and container_id = #{user.id}) " +
                                                    "or (container_type = 'Blog' and act_type= 'BlogComment' and container_id in #{blog_ids})").order('updated_at desc')

          all_count = activities.count
          activities = activities.limit(10).offset(page * 10)
          count = activities.count
          present :data, activities, with: Mobile::Entities::Activity,user: user
          present :all_count, all_count
          present :count, count
          present :page, page
          present :status, 0
        end
      end
    end
  end
end