<?php
/**
 * Datasource renderer CSV
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage db
 */

WBClass::load('WBDatasource_Renderer');

/**
 * Datasource renderer CSV 
 *
 * @version 1.0.1
 * @package WB
 * @subpackage db
 */
class WBDatasource_Renderer_HTML extends WBDatasource_Renderer
{
    /**
     * Configuration parameters
     */
    protected $config   =   array(
                                    'tmpl'  =>  ''
                                    );

    /**
     * template engine
     * @var patTemplate
     */
    protected $tmpl;
    
    /**
     * simple meta data
     * @var array
     */
    protected $meta =   array(
                                'count'         =>  0,
                                'datasource'    =>  ''  
                                );

    /**
     * Buffer List for all Items
     * @var array
     */
    protected $list =   array();
    
    /**
     * Start Rendering
     *
     * Start and configure template engine. Read templates from input.
     * Add date of current user (USER_CURRENT_*) and Configuration as
     * global config vars (CONFIG_*)
     * 
     * @param string $ds datasource name
     */
    public function start($ds)
    {
        $this->list =   array();
        $this->meta['datasource']       =   $ds;
        $this->meta['count']            =   0;
        $this->meta['list_entry_count'] =   0;

        $this->tmpl     =   WBClass::create('patTemplate');
        
        // allow to transport placeholder to surrounding templates
        $this->tmpl->setDefaultAttribute('unusedvars', 'ignore');
                
        // add user data
        WBClass::load('WBUser');
        $user   =   WBUser::getCurrent();
        if ($user->isAuthenticated()) {
            $this->tmpl->addGlobalVars($user->getData(), 'user_current_');
        }

        $tmpl   =   $ds;
        if (!empty($this->config['tmpl'])) {
            $tmpl   =   $this->config['tmpl'];
        }
        
        // load template
        $this->tmpl->readTemplatesFromInput(sprintf('Datasource/%s.tmpl', $tmpl));

        // add config as global vars
        $this->tmpl->addGlobalVars($this->config, 'config_');
        $this->tmpl->addGlobalVars($this->vars, 'att_');
    }

    /**
     * Render Single Item
     *
     * Well simply collect rows in member variable
     * @see $list
     * @param array $item
     */
    public function renderItem($item)
    {
        $this->list[]   =   $item;
    }
    
    /**
     * End of Iteration
     *
     * Add rows to template engine.
     * 
     * Count number of rows, add rows to default template "list_entry".
     * In case there are additional templates named "list_entry_*", add rows to them as well.
     * Finally flush current list of rows.
     */
    public function end()
    {
        $this->meta['list_entry_count'] =   count($this->list);
        $this->meta['count']            =   $this->meta['list_entry_count'];
        $this->tmpl->addRows('list_entry', $this->list);        
        $this->tmpl->addGlobalVars($this->meta);

        $tmpl   =   $this->tmpl->getList();
        $prefix =   'list_entry_';
        foreach ($tmpl as $t) {
            if (0 == strncmp($prefix, $t, strlen($prefix))) {
                $this->tmpl->addRows($t, $this->list);
            }
        }
        $this->list =   array();
    }
    
    /**
     * Get Actual HTML
     *
     * Get parsed template
     * @return string
     */
    public function getHtml()
    {
        return $this->tmpl->getParsedTemplate('snippet');
    }
}