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<?php
/**
* DokuWiki Action Plugin LoadSkin
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Michael Klier <chi@chimeric.de>
*/
// must be run within Dokuwiki
if(!defined('DOKU_INC')) die();

if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN', DOKU_INC.'lib/plugins/');
if(!defined('DOKU_LF')) define('DOKU_LF', "\n");

require_once(DOKU_PLUGIN.'action.php');

/**
* All DokuWiki plugins to interfere with the event system
* need to inherit from this class
*/
class action_plugin_loadskin extends DokuWiki_Action_Plugin {

    function getInfo() {
        return array(
                'author' => 'Michael Klier',
                'email' => 'chi@chimeric.de',
                'date' => @file_get_contents(DOKU_PLUGIN.'loadskin/VERSION'),
                'name' => 'loadskin',
             'desc' => 'Allows to change the used template for a namespace or certain pages',
                'url' => 'http://dokuwiki.org/plugin:loadskin'
            );
    }

    // register hook
    function register(&$controller) {
        $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'handleMeta');
$controller->register_hook('DOKUWIKI_STARTED', 'BEFORE', $this, 'handleConf');
    }

/**
* Overwrites the $conf['template'] setting
*
* Michael Klier <chi@chimeric.de>
*/
function handleConf(&$event, $param) {
global $ID;
global $conf;

$config = DOKU_INC.'conf/loadskin.conf';

if(@file_exists($config)) {
$data = unserialize(io_readFile($config, false));
$tpl = $this->getTpl($data, $ID);
if($tpl && $_REQUEST['do'] != 'admin') {
$conf['template'] = $tpl;
}
}
}

    /**
* Replaces the style headers with a different skin if specified in the
* configuration
*
* @author Michael Klier <chi@chimeric.de>
*/
    function handleMeta(&$event, $param) {
global $ID;

$config = DOKU_INC.'conf/loadskin.conf';

if(@file_exists($config)) {
$data = unserialize(io_readFile($config, false));
$tpl = $this->getTpl($data, $ID);

if($tpl && $_REQUEST['do'] != 'admin') {
$head =& $event->data;
for($i=0; $i<=count($head['link']); $i++) {
if($head['link'][$i]['rel'] == 'stylesheet') {
$head['link'][$i]['href'] = preg_replace('/t=([\w]+$)/', "t=$tpl", $head['link'][$i]['href']);
}
}
}
}
    }

/**
* Checks if a given page should use a different template then the default
*
* Michael Klier <chi@chimeric.de>
*/
function getTpl($data, $id) {
if($data[$id]) return $data[$id];

     $path = explode(':', $id);
     $found = false;

     while(count($path) > 0) {
         $id = implode(':', $path);
if($data[$id]) return $data[$id];
         array_pop($path);
     }
return false;
}
}

// vim:ts=4:sw=4:enc=utf-8:
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