<?php
/**
 * patTemplate-function to display rendered datasource
 *
 * $Id$
 *
 * @package Wombat
 * @subpackage patTemplate
 * @author gERD Schaufelberger <gerd@php-tools.net>
 */

WBClass::load('WBCache');

/**
 * patTemplate-function to display rendered datasource
 * 
 * Simple template function to add datasource 
 *  
 * @version 0.3.1
 * @package Wombat
 * @subpackage patTemplate
 */
class patTemplate_Function_Datasource extends patTemplate_Function
{
    /**
     * name of the function
     * @access   private
     * @var      string
     */
    public $_name  =   'Datasource';

    /**
     * tell that this function has to be executed during runtime
     * @var string
     */
    public $_type = PATTEMPLATE_FUNCTION_RUNTIME;
    
    /**
     * template engine
     * @var patTemplate
     */
    protected $tmpl;
    
    /**
     * Call the function
     *
     * Parameter:
     * - ttl (7200) time in seconds to cache result, use 0 to disable cache
     *
     * @access public
     * @param array $params parameters of the function (= attributes of the tag)
     * @param string $content inside tag
     * @return string content to insert into the template
     */
    public function call($params, $content)
    {        
        // content must be the datasource
        $datasource =   trim($content);
        if (empty($datasource)) {
            return '';
        }

        $params =   array_merge(array(
                            'ttl'   =>  7200
                            ), $params);

        $cid    =   '';
        if (0 < $params['ttl']) {
            $cid    =   sprintf('%s-%s-%s', $content, patI18n::getLocale(), serialize($params));
            $html   =   WBCache::get($cid);
            if ($html) {
                return $html;
            }
        }

        $randy  =   WBClass::create('WBDatasource_Renderer_HTML');
        $randy->setConfig($params);

        $ds     =   WBClass::create('WBDatasource_View');
        $ds->addVars($params);

        $ds->setRenderer($randy);
        $ds->render($datasource);

        $html   =   $randy->GetHtml();
        if (empty($cid)) {
            return $html;
        }

        WBCache::set($cid, $html, array('ttl' => $params['ttl']));
        return $html;
    }    
}