recordingable.rb

module Recordingable

  extend ActiveSupport::Concern

  included do
    has_many :recordings, as: :recordingable
    after_commit :record_item
  end

  module ClassMethods
    attr_reader :fields

    private

    def record(opts = [])
      @fields = opts
    end
  end

  def current_version?(recording)
    true if recording == self.recordings.order("created_at asc").last
  end

  # Creates old "fake" record for display
  # purposes only. Do record.throwback_to(recording)
  def throwback_to(recording)
    obj = self
    details = JSON.parse(recording.details)
    details.each do |k,v|
      if obj.has_attribute?(k)
        obj[k.to_sym] = v
      elsif obj.respond_to?("#{k}=")
        obj.send("#{k}=", v)
      else
        puts "no attribute found"
      end
    end
    obj
  end

  private

  def record_item
    return false unless item_changed?

    Recording.create({
      details:        serialize_attributes,
      user:           Current.user,
      account:        Current.user.account,
      ip_address:     Current.ip,
      action:         action,
      recordingable:  self
    })
  end

  def action
    transaction_include_any_action?([:create]) ? "created" : "updated"
  end

  def item_changed?
    last_details = self.recordings.order("created_at asc").last.try(:details)
    last_details == serialize_attributes ? false : true
  end

  def serialize_attributes
    output = {}
    self.class.fields.each do |k,v|
      output[k] = self.try(k)
    end
    output.to_json
  end
end