====== Permission Styles Plugin ======

---- plugin ----
description: Include different stylesheets depending on the groups a user is in.
author     : Gabriel Birke
email      : birke@d-scribe.de
type       : action
lastupdate : 2008-01-30
securitywarning: partlyhidden
tags       : acl, users, groups, style
----

If you want to hide some elements from users which are not in the admin group, if you want different backgrounds for different company departments---this plugin is for you. Just install it and put CSS files into the lib/styles/ folder that follow the convention of ''group_groupname.css'', for example ''group_admin.css'' .

===== To Do =====
   * Cache the available style files to avoid too many file_exist calls.
   * User-Specific stylesheets?


===== Plugin Code =====

<code php>
<?php
/**
 * Permission Styles: Include different stylesheets depending on the groups a user is in.
 * 
 * @author     Gabriel Birke <birke@d-scribe.de>
 */
 
if(!defined('DOKU_INC')) die();
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'action.php');
 
class action_plugin_permissionstyles extends DokuWiki_Action_Plugin {
 
  /**
   * return some info
   */
  function getInfo(){
    return array(
     'author' => 'Gabriel Birke',
     'email'  => '<birke@d-scribe.de',
     'date'   => '2008-01-30',
     'name'   => 'Action Plugin Permission Styles',
     'desc'   => 'Include different stylesheets depending on the groups a user is in.',
     'url'    => 'http://www.d-scribe.de',
     );
  }
 
  /**
   * Register its handlers with the DokuWiki's event controller
   */
  function register(Doku_Event_Handler $controller) {
    $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE',  $this, '_includeStylesheets');
  }
 
  /**
   * Look for group_*.css files in lib/styles/. 
   * Include the stylesheets for the group where the user is a member.
   */
  function _includeStylesheets(&$event, $param) {
    global $conf;
    $auth_class = 'auth_'.$conf['authtype'];
    $auth = new $auth_class();
    $userdata = $auth->getUserData($_SERVER['REMOTE_USER']);
    if(empty($userdata) || empty($userdata['grps']))
      return;
    foreach($userdata['grps'] as $group)
    {
      $file = 'lib/styles/group_'.$group.'.css';
      if(file_exists(DOKU_INC.$file))
      {
        $event->data['link'][] = array (
            'rel' => 'stylesheet',
            'type' => 'text/css',
            'href' => DOKU_BASE.$file
        );
      }
    }
  }
}
</code>