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<?php
/*
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

if (!class_exists('Google_Client')) {
  require_once dirname(__FILE__) . '/../autoload.php';
}

/**
 * Class to hold information about an authenticated login.
 *
 * @author Brian Eaton <beaton@google.com>
 */
class Google_Auth_LoginTicket
{
  const USER_ATTR = "sub";

// Information from id token envelope.
  private $envelope;

// Information from id token payload.
  private $payload;

/**
   * Creates a user based on the supplied token.
   *
   * @param string $envelope Header from a verified authentication token.
   * @param string $payload Information from a verified authentication token.
   */
  public function __construct($envelope, $payload)
  {
    $this->envelope = $envelope;
    $this->payload = $payload;
  }

/**
   * Returns the numeric identifier for the user.
   * @throws Google_Auth_Exception
   * @return
   */
  public function getUserId()
  {
    if (array_key_exists(self::USER_ATTR, $this->payload)) {
      return $this->payload[self::USER_ATTR];
    }
    throw new Google_Auth_Exception("No user_id in token");
  }

/**
   * Returns attributes from the login ticket.  This can contain
   * various information about the user session.
   * @return array
   */
  public function getAttributes()
  {
    return array("envelope" => $this->envelope, "payload" => $this->payload);
  }
}