Assembler Layer

UserAssembler.php

<?php
/**
 *
 */
App::uses('UserEDM', 'Entity');

use Facebook\GraphObject;

class UserAssembler implements EntityAssembler {
  const FB_FIRST_NAME = 'first_name';
  const FB_LAST_NAME = 'last_name';
  const FB_EMAIL = 'email';

  /**
   * Assemble a new entity given an arbitrary object.
   *
   * @param $object The arbitrary object to attempt to assemble.
   * @return UserEDM
   * @throws CannotAssembleEntityException if $object is not one of [GraphObject, Array]
   */
  public static function toEntity($object) {
    $result = new UserEDM();

    if($object instanceof GraphObject) {
      self::toEntityFromGraphObject($object, $result);
    }
    elseif(is_array($object)) {
      self::toEntityFromArray($object, $result);
    }
    else {
      throw new CannotAssembleEntityException('UserAssembler expects one of GraphObject, Array');
    }

    return $result;
  }

  /**
   * Convert a GraphObject from Facebook into a User entity.
   *
   * @param GraphObject $graphObject The return object of a Facebook session.
   * @param UserEDM     $result      The resulting entity to set attributes to.
   */
  private static function toEntityFromGraphObject(GraphObject $graphObject, UserEDM $result) {
    $result->setFirstName($graphObject->getProperty(self::FB_FIRST_NAME));
    $result->setLastName($graphObject->getProperty(self::FB_LAST_NAME));
    $result->setEmail($graphObject->getProperty(self::FB_EMAIL));
  }

  /**
   * Convert an Array from the repository layer into a User entity.
   *
   * @param array   $user   The array that contains user data.
   * @param UserEDM $result The resulting user entity object.
   */
  private static function toEntityFromArray(Array $user, UserEDM $result) {
    $result->setFirstName($user['mbfirstname']);
    $result->setLastName($user['mblastname']);
    $result->setEmail($user['mbemail']);
  }
}