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<?php
/**
 * PHPUnit
 *
 * Copyright (c) 2011-2012, Sebastian Bergmann <sebastian@phpunit.de>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *   * Neither the name of Sebastian Bergmann nor the names of his
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package    PHPUnit
 * @subpackage Extensions_TicketListener
 * @author     Jan Sorgalla <jsorgalla@googlemail.com>
 * @copyright  2011-2012 Sebastian Bergmann <sebastian@phpunit.de>
 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @link       http://www.phpunit.de/
 * @since      File available since Release 1.0.0
 */

/**
 * A ticket listener that interacts with the Google Code issue API.
 *
 * @package    PHPUnit
 * @subpackage Extensions_TicketListener
 * @author     Jan Sorgalla <jsorgalla@googlemail.com>
 * @copyright  2011-2012 Sebastian Bergmann <sebastian@phpunit.de>
 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version    Release: 1.0.0
 * @link       http://www.phpunit.de/
 * @since      Class available since Release 1.0.0
 */
class PHPUnit_Extensions_TicketListener_GoogleCode extends PHPUnit_Extensions_TicketListener
{
    private $email;
    private $password;
    private $project;

    private $statusClosed;
    private $statusReopened;

    private $printTicketStateChanges;

    private $authUrl    = 'https://www.google.com/accounts/ClientLogin';
    private $apiBaseUrl = 'http://code.google.com/feeds/issues/p/%s/issues';
    private $authToken;

    /**
     * @param string $email          The email associated with the Google account.
     * @param string $password       The password associated with the Google account.
     * @param string $project        The project name of the system under test (SUT) on Google Code.
     * @param string $printTicketChanges Boolean flag to print the ticket state changes in the test result.
     * @param string $statusClosed   The status name of the closed state.
     * @param string $statusReopened The status name of the reopened state.
     * @throws RuntimeException
     */
    public function __construct($email, $password, $project, $printTicketStateChanges = FALSE, $statusClosed = 'Fixed', $statusReopened = 'Started')
    {
        $this->email                   = $email;
        $this->password                = $password;
        $this->project                 = $project;
        $this->statusClosed            = $statusClosed;
        $this->statusReopened          = $statusReopened;
        $this->printTicketStateChanges = $printTicketStateChanges;
        $this->apiBaseUrl              = sprintf($this->apiBaseUrl, $project);
    }

    /**
     * @param  integer $ticketId
     * @return array
     * @throws RuntimeException
     */
    public function getTicketInfo($ticketId = NULL)
    {
        if (!is_numeric($ticketId)) {
            return array('status' => 'invalid_ticket_id');
        }

        $url    = $this->apiBaseUrl . '/full/' . $ticketId;
        $header = array(
          'Authorization: GoogleLogin auth=' . $this->getAuthToken()
        );

        list($status, $response) = $this->callGoogleCode($url, $header);

        if ($status != 200 || !$response) {
            return array('state' => 'unknown_ticket');
        }

        $ticket = new SimpleXMLElement(str_replace("xmlns=", "ns=", $response));
        $result = $ticket->xpath('//issues:state');
        $state  = (string)$result[0];

        if ($state === 'open') {
            return array('status' => 'new');
        }

        if ($state === 'closed') {
            return array('status' => 'closed');
        }

        return array('status' => $state);
    }

    /**
     * @param string $ticketId   The ticket number of the ticket under test (TUT).
     * @param string $statusToBe The status of the TUT after running the associated test.
     * @param string $message    The additional message for the TUT.
     * @param string $resolution The resolution for the TUT.
     * @throws RuntimeException
     */
    protected function updateTicket($ticketId, $statusToBe, $message, $resolution)
    {
        $url = $this->apiBaseUrl . '/' . $ticketId . '/comments/full';

        $header = array(
          'Authorization: GoogleLogin auth=' . $this->getAuthToken(),
          'Content-Type: application/atom+xml'
        );

        if ($statusToBe == 'closed') {
            $ticketStatus = $this->statusClosed;
        } else {
            $ticketStatus = $this->statusReopened;
        }

        list($author,) = explode('@', $this->email);

        $post = '<?xml version="1.0" encoding="UTF-8"?>' .
                '<entry xmlns="http://www.w3.org/2005/Atom" ' .
                '       xmlns:issues="http://schemas.google.com/projecthosting/issues/2009">' .
                '  <content type="html">' . htmlspecialchars($message, ENT_COMPAT, 'UTF-8') . '</content>' .
                '  <author>' .
                '    <name>' . htmlspecialchars($author, ENT_COMPAT, 'UTF-8') . '</name>' .
                '  </author>' .
                '  <issues:updates>' .
                '    <issues:status>' . htmlspecialchars($ticketStatus, ENT_COMPAT, 'UTF-8') . '</issues:status>' .
                '  </issues:updates>' .
                '</entry>';

        list($status, $response) = $this->callGoogleCode($url, $header, $post);

        if ($status != 201) {
            throw new RuntimeException('Updating GoogleCode issue failed with status code ' . $status);
        }

        if ($this->printTicketStateChanges) {
            printf(
                "\nUpdating GoogleCode issue #%d, status: %s\n",
                $ticketId,
                $statusToBe
            );
        }
    }

    /**
     * @return string The auth token
     * @throws RuntimeException
     */
    private function getAuthToken()
    {
        if (NULL !== $this->authToken) {
            return $this->authToken;
        }

        $header = array(
            'Content-Type: application/x-www-form-urlencoded',
        );

        $post = array(
            'accountType' => 'GOOGLE',
            'Email'       => $this->email,
            'Passwd'      => $this->password,
            'service'     => 'code',
            'source'      => 'PHPUnit-TicketListener_GoogleCode-' . PHPUnit_Runner_Version::id(),
        );

        list($status, $response) = $this->callGoogleCode(
            $this->authUrl,
            $header,
            http_build_query($post, NULL, '&')
        );

        if ($status != 200) {
            throw new RuntimeException('Google account authentication failed');
        }

        foreach (explode("\n", $response) as $line) {
            if (strpos(trim($line), 'Auth') === 0) {
                list($name, $token) = explode('=', $line);
                $this->authToken    = trim($token);
                break;
            }
        }

        if (NULL === $this->authToken) {
            throw new RuntimeException('Could not detect auth token in response');
        }

        return $this->authToken;
    }

    /**
     * @param string  $url URL to call
     * @param array   $header Header
     * @param string  $post Post data
     * @return array
     */
    private function callGoogleCode($url, array $header = NULL, $post = NULL)
    {
        $curlHandle = curl_init();

        curl_setopt($curlHandle, CURLOPT_URL, $url);
        curl_setopt($curlHandle, CURLOPT_FOLLOWLOCATION, TRUE);
        curl_setopt($curlHandle, CURLOPT_FAILONERROR, TRUE);
        curl_setopt($curlHandle, CURLOPT_FRESH_CONNECT, TRUE);
        curl_setopt($curlHandle, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($curlHandle, CURLOPT_HTTPPROXYTUNNEL, TRUE);
        curl_setopt($curlHandle, CURLOPT_USERAGENT, __CLASS__);
        curl_setopt($curlHandle, CURLOPT_SSL_VERIFYPEER, FALSE);

        if (NULL !== $header) {
            curl_setopt($curlHandle, CURLOPT_HTTPHEADER, $header);
        }

        if (NULL !== $post) {
            curl_setopt($curlHandle, CURLOPT_POST, TRUE);
            curl_setopt($curlHandle, CURLOPT_POSTFIELDS, $post);
        }

        $response = curl_exec($curlHandle);
        $status   = curl_getinfo($curlHandle, CURLINFO_HTTP_CODE);

        if (!$response) {
            throw new RuntimeException(curl_error($curlHandle));
        }

        curl_close($curlHandle);

        return array($status, $response);
    }
}