'use strict';

var utils = require('../utils');
var common = require('./common');
var DataModificationBase = require('../base-messages/DataModificationBase');

module.exports = DataModificationMessage;

function DataModificationMessage(content, transport) {
  DataModificationBase.call(this, content, transport);
}

require('util').inherits(DataModificationMessage, DataModificationBase);

DataModificationMessage.prototype.attribute = function (attribute) {
  utils.validate.object(attribute, 'attribute');
  utils.validate.notEmptyString(attribute.name, 'attribute name');
  utils.validate.attributeName(this._content.attributes, attribute.name);

  if (attribute.old !== undefined || attribute.new !== undefined) {
    utils.validate.string(attribute.old, 'attribute old value');
    utils.validate.string(attribute.new, 'attribute new value');
  }

  this._content.attributes.push(attribute);
  return this;
};

DataModificationMessage.prototype._validateContent = function () {
  DataModificationBase.prototype._validateContent.call(this);
  utils.validate.provided(this._content['data_subject'], 'data-subject');
};

DataModificationMessage.prototype.dataSubject = common.dataSubject;
DataModificationMessage.prototype.logPrepare = common.logPrepare;
DataModificationMessage.prototype.logSuccess = common.logSuccess;
DataModificationMessage.prototype.logFailure = common.logFailure;