<?php

/**

 * Defines the root directory of the Drupal installation.

 */

define('DRUPAL_ROOT', getcwd());

/**

 * @file

 * Administrative page for handling updates from one Drupal version to another.

 *

 * Point your browser to "http://www.example.com/update.php" and follow the

 * instructions.

 *

 * If you are not logged in using either the site maintenance account or an

 * account with the "Administer software updates" permission, you will need to

 * modify the access check statement inside your settings.php file. After

 * finishing the upgrade, be sure to open settings.php again, and change it

 * back to its original state!

 */

/**

 * Global flag indicating that update.php is being run.

 *

 * When this flag is set, various operations do not take place, such as invoking

 * hook_init() and hook_exit(), css/js preprocessing, and translation.

 */

define('MAINTENANCE_MODE', 'update');

/**

 * Renders a form with a list of available database updates.

 */

function update_selection_page() {

  drupal_set_title('Drupal database update');

  $elements = drupal_get_form('update_script_selection_form');

  $output = drupal_render($elements);

  update_task_list('select');

  return $output;

}

/**

 * Form constructor for the list of available database module updates.

 */

function update_script_selection_form($form, &$form_state) {

  $count = 0;

  $incompatible_count = 0;

  $form['start'] = array(

    '#tree' => TRUE,

    '#type' => 'fieldset',

    '#collapsed' => TRUE,

    '#collapsible' => TRUE,

  );

  // Ensure system.module's updates appear first.

  $form['start']['system'] = array();

  $updates = update_get_update_list();

  $starting_updates = array();

  $incompatible_updates_exist = FALSE;

  foreach ($updates as $module => $update) {

    if (!isset($update['start'])) {

      $form['start'][$module] = array(

        '#type' => 'item',

        '#title' => $module . ' module',

        '#markup'  => $update['warning'],

        '#prefix' => '<div class="messages warning">',

        '#suffix' => '</div>',

      );

      $incompatible_updates_exist = TRUE;

      continue;

    }

    if (!empty($update['pending'])) {

      $starting_updates[$module] = $update['start'];

      $form['start'][$module] = array(

        '#type' => 'hidden',

        '#value' => $update['start'],

      );

      $form['start'][$module . '_updates'] = array(

        '#theme' => 'item_list',

        '#items' => $update['pending'],

        '#title' => $module . ' module',

      );

    }

    if (isset($update['pending'])) {

      $count = $count + count($update['pending']);

    }

  }

  // Find and label any incompatible updates.

  foreach (update_resolve_dependencies($starting_updates) as $function => $data) {

    if (!$data['allowed']) {

      $incompatible_updates_exist = TRUE;

      $incompatible_count++;

      $module_update_key = $data['module'] . '_updates';

      if (isset($form['start'][$module_update_key]['#items'][$data['number']])) {

        $text = $data['missing_dependencies'] ? 'This update will been skipped due to the following missing dependencies: <em>' . implode(', ', $data['missing_dependencies']) . '</em>' : "This update will be skipped due to an error in the module's code.";

        $form['start'][$module_update_key]['#items'][$data['number']] .= '<div class="warning">' . $text . '</div>';

      }

      // Move the module containing this update to the top of the list.

      $form['start'] = array($module_update_key => $form['start'][$module_update_key]) + $form['start'];

    }

  }

  // Warn the user if any updates were incompatible.

  if ($incompatible_updates_exist) {

    drupal_set_message('Some of the pending updates cannot be applied because their dependencies were not met.', 'warning');

  }

  if (empty($count)) {

    drupal_set_message(t('No pending updates.'));

    unset($form);

    $form['links'] = array(

      '#markup' => theme('item_list', array('items' => update_helpful_links())),

    );

    // No updates to run, so caches won't get flushed later.  Clear them now.

    drupal_flush_all_caches();

  }

  else {

    $form['help'] = array(

      '#markup' => '<p>The version of Drupal you are updating from has been automatically detected.</p>',

      '#weight' => -5,

    );

    if ($incompatible_count) {

      $form['start']['#title'] = format_plural(

        $count,

        '1 pending update (@number_applied to be applied, @number_incompatible skipped)',

        '@count pending updates (@number_applied to be applied, @number_incompatible skipped)',

        array('@number_applied' => $count - $incompatible_count, '@number_incompatible' => $incompatible_count)

      );

    }

    else {

      $form['start']['#title'] = format_plural($count, '1 pending update', '@count pending updates');

    }

    $form['has_js'] = array(

      '#type' => 'hidden',

      '#default_value' => FALSE,

    );

    $form['actions'] = array('#type' => 'actions');

    $form['actions']['submit'] = array(

      '#type' => 'submit',

      '#value' => 'Apply pending updates',

    );

  }

  return $form;

}

/**

 * Provides links to the homepage and administration pages.

 */

function update_helpful_links() {

  $links[] = '<a href="' . base_path() . '">Front page</a>';

  if (user_access('access administration pages')) {

    $links[] = '<a href="' . base_path() . '?q=admin">Administration pages</a>';

  }

  return $links;

}

/**

 * Displays results of the update script with any accompanying errors.

 */

function update_results_page() {

  drupal_set_title('Drupal database update');

  $links = update_helpful_links();

  update_task_list();

  // Report end result.

  if (module_exists('dblog') && user_access('access site reports')) {

    $log_message = ' All errors have been <a href="' . base_path() . '?q=admin/reports/dblog">logged</a>.';

  }

  else {

    $log_message = ' All errors have been logged.';

  }

  if ($_SESSION['update_success']) {

    $output = '<p>Updates were attempted. If you see no failures below, you may proceed happily back to your <a href="' . base_path() . '">site</a>. Otherwise, you may need to update your database manually.' . $log_message . '</p>';

  }

  else {

    $updates_remaining = reset($_SESSION['updates_remaining']);

    list($module, $version) = array_pop($updates_remaining);

    $output = '<p class="error">The update process was aborted prematurely while running <strong>update #' . $version . ' in ' . $module . '.module</strong>.' . $log_message;

    if (module_exists('dblog')) {

      $output .= ' You may need to check the <code>watchdog</code> database table manually.';

    }

    $output .= '</p>';

  }

  if (!empty($GLOBALS['update_free_access'])) {

    $output .= "<p><strong>Reminder: don't forget to set the <code>\$update_free_access</code> value in your <code>settings.php</code> file back to <code>FALSE</code>.</strong></p>";

  }

  $output .= theme('item_list', array('items' => $links));

  // Output a list of queries executed.

  if (!empty($_SESSION['update_results'])) {

    $all_messages = '';

    foreach ($_SESSION['update_results'] as $module => $updates) {

      if ($module != '#abort') {

        $module_has_message = FALSE;

        $query_messages = '';

        foreach ($updates as $number => $queries) {

          $messages = array();

          foreach ($queries as $query) {

            // If there is no message for this update, don't show anything.

            if (empty($query['query'])) {

              continue;

            }

            if ($query['success']) {

              $messages[] = '<li class="success">' . $query['query'] . '</li>';

            }

            else {

              $messages[] = '<li class="failure"><strong>Failed:</strong> ' . $query['query'] . '</li>';

            }

          }

          if ($messages) {

            $module_has_message = TRUE;

            $query_messages .= '<h4>Update #' . $number . "</h4>\n";

            $query_messages .= '<ul>' . implode("\n", $messages) . "</ul>\n";

          }

        }

        // If there were any messages in the queries then prefix them with the

        // module name and add it to the global message list.

        if ($module_has_message) {

          $all_messages .= '<h3>' . $module . " module</h3>\n" . $query_messages;

        }

      }

    }

    if ($all_messages) {

      $output .= '<div id="update-results"><h2>The following updates returned messages</h2>';

      $output .= $all_messages;

      $output .= '</div>';

    }

  }

  unset($_SESSION['update_results']);

  unset($_SESSION['update_success']);

  return $output;

}

/**

 * Provides an overview of the Drupal database update.

 *

 * This page provides cautionary suggestions that should happen before

 * proceeding with the update to ensure data integrity.

 *

 * @return

 *   Rendered HTML form.

 */

function update_info_page() {

  // Change query-strings on css/js files to enforce reload for all users.

  _drupal_flush_css_js();

  // Flush the cache of all data for the update status module.

  if (db_table_exists('cache_update')) {

    cache_clear_all('*', 'cache_update', TRUE);

  }

  update_task_list('info');

  drupal_set_title('Drupal database update');

  $token = drupal_get_token('update');

  $output = '<p>Use this utility to update your database whenever a new release of Drupal or a module is installed.</p><p>For more detailed information, see the <a href="http://drupal.org/upgrade">upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.</p>';

  $output .= "<ol>\n";

  $output .= "<li><strong>Back up your database</strong>. This process will change your database values and in case of emergency you may need to revert to a backup.</li>\n";

  $output .= "<li><strong>Back up your code</strong>. Hint: when backing up module code, do not leave that backup in the 'modules' or 'sites/*/modules' directories as this may confuse Drupal's auto-discovery mechanism.</li>\n";

  $output .= '<li>Put your site into <a href="' . base_path() . '?q=admin/config/development/maintenance">maintenance mode</a>.</li>' . "\n";

  $output .= "<li>Install your new files in the appropriate location, as described in the handbook.</li>\n";

  $output .= "</ol>\n";

  $output .= "<p>When you have performed the steps above, you may proceed.</p>\n";

  $form_action = check_url(drupal_current_script_url(array('op' => 'selection', 'token' => $token)));

  $output .= '<form method="post" action="' . $form_action . '"><p><input type="submit" value="Continue" class="form-submit" /></p></form>';

  $output .= "\n";

  return $output;

}

/**

 * Renders a 403 access denied page for update.php.

 *

 * @return

 *   Rendered HTML warning with 403 status.

 */

function update_access_denied_page() {

  drupal_add_http_header('Status', '403 Forbidden');

  watchdog('access denied', 'update.php', NULL, WATCHDOG_WARNING);

  drupal_set_title('Access denied');

  return '<p>Access denied. You are not authorized to access this page. Log in using either an account with the <em>administer software updates</em> permission or the site maintenance account (the account you created during installation). If you cannot log in, you will have to edit <code>settings.php</code> to bypass this access check. To do this:</p>

<ol>

 <li>With a text editor find the settings.php file on your system. From the main Drupal directory that you installed all the files into, go to <code>sites/your_site_name</code> if such directory exists, or else to <code>sites/default</code> which applies otherwise.</li>

 <li>There is a line inside your settings.php file that says <code>$update_free_access = FALSE;</code>. Change it to <code>$update_free_access = TRUE;</code>.</li>

 <li>As soon as the update.php script is done, you must change the settings.php file back to its original form with <code>$update_free_access = FALSE;</code>.</li>

 <li>To avoid having this problem in the future, remember to log in to your website using either an account with the <em>administer software updates</em> permission or the site maintenance account (the account you created during installation) before you backup your database at the beginning of the update process.</li>

</ol>';

}

/**

 * Determines if the current user is allowed to run update.php.

 *

 * @return

 *   TRUE if the current user should be granted access, or FALSE otherwise.

 */

function update_access_allowed() {

  global $update_free_access, $user;

  // Allow the global variable in settings.php to override the access check.

  if (!empty($update_free_access)) {

    return TRUE;

  }

  // Calls to user_access() might fail during the Drupal 6 to 7 update process,

  // so we fall back on requiring that the user be logged in as user #1.

  try {

    require_once DRUPAL_ROOT . '/' . drupal_get_path('module', 'user') . '/user.module';

    return user_access('administer software updates');

  }

  catch (Exception $e) {

    return ($user->uid == 1);

  }

}

/**

 * Adds the update task list to the current page.

 */

function update_task_list($active = NULL) {

  // Default list of tasks.

  $tasks = array(

    'requirements' => 'Verify requirements',

    'info' => 'Overview',

    'select' => 'Review updates',

    'run' => 'Run updates',

    'finished' => 'Review log',

  );

  drupal_add_region_content('sidebar_first', theme('task_list', array('items' => $tasks, 'active' => $active)));

}

/**

 * Returns and stores extra requirements that apply during the update process.

 */

function update_extra_requirements($requirements = NULL) {

  static $extra_requirements = array();

  if (isset($requirements)) {

    $extra_requirements += $requirements;

  }

  return $extra_requirements;

}

/**

 * Checks update requirements and reports errors and (optionally) warnings.

 *

 * @param $skip_warnings

 *   (optional) If set to TRUE, requirement warnings will be ignored, and a

 *   report will only be issued if there are requirement errors. Defaults to

 *   FALSE.

 */

function update_check_requirements($skip_warnings = FALSE) {

  // Check requirements of all loaded modules.

  $requirements = module_invoke_all('requirements', 'update');

  $requirements += update_extra_requirements();

  $severity = drupal_requirements_severity($requirements);

  // If there are errors, always display them. If there are only warnings, skip

  // them if the caller has indicated they should be skipped.

  if ($severity == REQUIREMENT_ERROR || ($severity == REQUIREMENT_WARNING && !$skip_warnings)) {

    update_task_list('requirements');

    drupal_set_title('Requirements problem');

    $status_report = theme('status_report', array('requirements' => $requirements));

    $status_report .= 'Check the error messages and <a href="' . check_url(drupal_requirements_url($severity)) . '">try again</a>.';

    print theme('update_page', array('content' => $status_report));

    exit();

  }

}

// Some unavoidable errors happen because the database is not yet up-to-date.

// Our custom error handler is not yet installed, so we just suppress them.

ini_set('display_errors', FALSE);

// We prepare a minimal bootstrap for the update requirements check to avoid

// reaching the PHP memory limit.

require_once DRUPAL_ROOT . '/includes/bootstrap.inc';

require_once DRUPAL_ROOT . '/includes/update.inc';

require_once DRUPAL_ROOT . '/includes/common.inc';

require_once DRUPAL_ROOT . '/includes/file.inc';

require_once DRUPAL_ROOT . '/includes/entity.inc';

require_once DRUPAL_ROOT . '/includes/unicode.inc';

update_prepare_d7_bootstrap();

// Temporarily disable configurable timezones so the upgrade process uses the

// site-wide timezone. This prevents a PHP notice during session initlization

// and before offsets have been converted in user_update_7002().

$configurable_timezones = variable_get('configurable_timezones', 1);

$conf['configurable_timezones'] = 0;

// Determine if the current user has access to run update.php.

drupal_bootstrap(DRUPAL_BOOTSTRAP_SESSION);

// Reset configurable timezones.

$conf['configurable_timezones'] = $configurable_timezones;

// Only allow the requirements check to proceed if the current user has access

// to run updates (since it may expose sensitive information about the site's

// configuration).

$op = isset($_REQUEST['op']) ? $_REQUEST['op'] : '';

if (empty($op) && update_access_allowed()) {

  require_once DRUPAL_ROOT . '/includes/install.inc';

  require_once DRUPAL_ROOT . '/modules/system/system.install';

  // Load module basics.

  include_once DRUPAL_ROOT . '/includes/module.inc';

  $module_list['system']['filename'] = 'modules/system/system.module';

  module_list(TRUE, FALSE, FALSE, $module_list);

  drupal_load('module', 'system');

  // Reset the module_implements() cache so that any new hook implementations

  // in updated code are picked up.

  module_implements('', FALSE, TRUE);

  // Set up $language, since the installer components require it.

  drupal_language_initialize();

  // Set up theme system for the maintenance page.

  drupal_maintenance_theme();

  // Check the update requirements for Drupal. Only report on errors at this