Club Drupal

<?php

/**

 * @file

 * Contains the Flag Bookmark view argument validator.

 */

/**

 * Validates whether an argument is a valid UID.

 *

 * @ingroup views

 */

class flag_bookmark_plugin_validate_user extends views_plugin_argument_validate_user {

  /**

   * Define the options for the plugin, including the default permission.

   * @return multitype:string

   */

  function option_definition() {

    // Initialize the base class.

    $options = parent::option_definition();

    // Set the default permission.

    $options['bypass_perm'] = array('default' => 'administer users');

    return $options;

  }

  /**

   * Returns a option form for the plugin.

   */

  function options_form(&$form, &$form_state) {

    // Get the options form from the base class.

    parent::options_form($form, $form_state);

    $perms = array();

    $module_info = system_get_info('module');

    $perms[] = t(' - None - ');

    // Produce an array of permissions keyed by module name.

    foreach (module_implements('permission') as $module) {

      $permissions = module_invoke($module, 'permission');

      foreach ($permissions as $name => $perm) {

        $perms[$module_info[$module]['name']][$name] = strip_tags($perm['title']);

      }

    }

    asort($perms);

    // Create the form field for the validator. Returned by reference.

    $form['bypass_perm'] = array(

      '#type' => 'select',

      '#options' => $perms,

      '#title' => t('Override permission'),

      '#default_value' => $this->options['bypass_perm'],

      '#description' => t('Users with this permission bypass the argument check and are granted access.'),

    );

  }

  /**

   * Validates the argument to be a proper UID.

   * @param mixed $argument

   * @return boolean

   */

  function validate_argument($argument) {

    // The parent class takes care of all its options, returning TRUE if the

    // argument value validates to a user account, and an account that has the

    // required role.

    $argument_validates = parent::validate_argument($argument);

    // If the parent didn't validate the argument, then we certainly can't

    // either.

    if ($argument_validates == FALSE) {

      return $argument_validates;

    }

    // If the current user has the bypass permission, then we're done: return

    // the validation status we got from the parent.

    if (!empty($this->options['bypass_perm']) && user_access($this->options['bypass_perm'])) {

      return $argument_validates;

    }

    // Otherwise, perform our additional check to enforce that the argument

    // user ID is the current user.

    // The parent method has stored the uid from the argument.

    return ($this->argument->argument == $GLOBALS['user']->uid);

  }

}