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   1  <?php
   2  
   3  /**
   4   * @file
   5   * Alerts other sites that your site has been updated.
   6   */
   7  
   8  /**
   9   * Implementation of hook_help().
  10   */
  11  function ping_help($path, $arg) {
  12    switch ($path) {
  13      case 'admin/help#ping':
  14        $output = '<p>'. t('The ping module is useful for notifying interested sites that your site has changed. It automatically sends notifications, or "pings", to the <a href="@external-http-pingomatic-com">pingomatic</a> service about new or updated content. In turn, <a href="@external-http-pingomatic-com">pingomatic</a> notifies other popular services, including weblogs.com, Technorati, blo.gs, BlogRolling, Feedster.com, and Moreover.', array('@external-http-pingomatic-com' => 'http://pingomatic.com/')) .'</p>';
  15        $output .= '<p>'. t('The ping module requires a correctly configured <a href="@cron">cron maintenance task</a>.', array('@cron' => url('admin/reports/status'))) .'</p>';
  16        $output .= '<p>'. t('For more information, see the online handbook entry for <a href="@ping">Ping module</a>.', array('@ping' => 'http://drupal.org/handbook/modules/ping/')) .'</p>';
  17        return $output;
  18    }
  19  }
  20  
  21  /**
  22   * Implementation of hook_cron().
  23   *
  24   * Fire off notifications of updates to remote sites.
  25   */
  26  function ping_cron() {
  27    global $base_url;
  28  
  29    if (variable_get('site_name', 0)) {
  30      $cron_last = variable_get('cron_last', time());
  31      // Query changed first since usually changed >= created.
  32      if (db_result(db_query('SELECT COUNT(*) FROM {node} WHERE status = 1 AND changed > %d', $cron_last)) || db_result(db_query('SELECT COUNT(*) FROM {node} WHERE status = 1 AND created > %d', $cron_last))) {
  33        _ping_notify(variable_get('site_name', ''), $base_url);
  34      }
  35    }
  36  }
  37  
  38  /**
  39   * Call hook_ping() in all modules to notify remote sites that there is
  40   * new content at this one.
  41   */
  42  function _ping_notify($name, $url) {
  43    module_invoke_all('ping', $name, $url);
  44  }
  45  
  46  /**
  47   * Implementation of hook_ping().
  48   *
  49   * Notifies pingomatic.com, blo.gs, and technorati.com of changes at this site.
  50   */
  51  function ping_ping($name = '', $url = '') {
  52  
  53    $result = xmlrpc('http://rpc.pingomatic.com', 'weblogUpdates.ping', $name, $url);
  54  
  55    if ($result === FALSE) {
  56      watchdog('directory ping', 'Failed to notify pingomatic.com (site).', array(), WATCHDOG_WARNING);
  57    }
  58  }
  59  
  60