ReadMarkable

readmarkable.rb

module ReadMarkable
  extend ActiveSupport::Concern

  included do

    has_many :read_marks

    def touch_read_at
      update_column(:read_at, Time.now)
    end

    def mark_as_unread_except current_user
      ReadMark.delete_all(inquiry_id: id)
      ReadMark.create(inquiry_id: id, user_id: current_user.id)
      touch_read_at
    end

    def mark_as_unread_for current_user
      ReadMark.delete_all(inquiry_id: id)
      touch_read_at
    end

    def mark_as_unread_for_priveleged current_user
      priveleged_users = User.select(:id).privileged
      ReadMark.delete_all(inquiry_id: id, user_id: priveleged_users.pluck(:id))
      ReadMark.create(inquiry_id: id, user_id: current_user.id)
      touch_read_at
    end

    def mark_as_read_for current_user
      ReadMark.delete_all(inquiry_id: id, user_id: current_user.id)
      ReadMark.create(inquiry_id: id, user_id: current_user.id)
      touch_read_at
    end

    def unread? current_user
      ReadMark.where(inquiry_id: id, user_id: current_user.id).count.zero?
    end

    def self.count_unread_by current_user
      count - includes(:read_marks).where(read_marks: { user_id: current_user.id }).count
    end

    def self.ordered_by_unread_for current_user
      joins(
        "LEFT JOIN read_marks ON read_marks.inquiry_id    = inquiries.id
                             AND read_marks.user_id        = #{current_user.id}"
      ).
      order('IF(read_marks.inquiry_id IS NULL, 1, 0) DESC').
      readonly(false)
    end

  end

end