<?php
/**
 * Simple AJAX stub: Comment
 *
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBAjax');

/**
 * Simple AJAX stub: Comment
 *
 * Allow to call method via AJAX request
 *
 * @version 0.2.0
 * @package WB
 * @subpackage base
 */
class WBAjax_Comment extends WBAjax
{
    
    /**
     * comment 
     * @var WBDatasource_Comment
     */
    protected $comment;
    
    /**
     * second construcotr
     * 
     * Called by constructer of super class.
     * 
     * @see include/WB/WBAjax#init()
     */
    protected function init()
    {
        $this->comment  =   WBClass::create('WBDatasource_Comment');
    }
    
    /**
     * browse comments
     * 
     * The actual AJAX frontend. 
     * 
     * @uses doBrowse()
     * @return string comment list HTML
     */
    protected function browse()
    {
        $namespace  =   $this->req->get('namespace', '');
        $xid        =   $this->req->get('xid', 0);
        $goto       =   $this->req->get('commentgoto', 0);
        $limit      =   $this->req->get('limit', 0);

        return $this->doBrowse($namespace, $xid, $goto, $limit);
    }
    
    /**
     * add comments
     * 
     * @todo consider where to call htmlspecialchars: on save or on display
     * @todo solve problem of auto-approve when adding comments 
     * @uses doBrowse()
     * @return string comment list HTML
     */
    protected function add()
    {
        $namespace  =   $this->req->get('namespace', '');
        $xid        =   $this->req->get('xid', 0);
        $limit      =   $this->req->get('limit', 0);

        $this->comment->setNamespace($namespace)->setXId($xid);

        $comment    =   $this->req->get('comment', '');
        if (empty($comment)) {
            return $this->doBrowse($namespace, $xid);
        }
        
        $id =   $this->comment->add($comment);
        if (!empty($id)) {
            $this->tmpl->addGlobalVar('comment_approved', intval($this->comment->isApproved()));
        }
        return $this->doBrowse($namespace, $xid, 0, $limit);
    }
    
    /**
     * approve comment
     * 
     * @uses doBrowse()
     * @return string comment list HTML
     */
    protected function approve()
    {
        $id         =   $this->req->get('id');
        $this->comment->approve($id);
        
        $namespace  =   $this->comment->getNamespace();
        $xid        =   $this->comment->getXid();
        $goto       =   $this->req->get('commentgoto', 0);
        $limit      =   $this->req->get('limit', 0);
        return $this->doBrowse($namespace, $xid, $goto, $limit);
    }
    
    /**
     * delete comment
     * 
     * @uses doBrowse()
     * @return string comment list HTML
     */
    protected function remove()
    {
        $id         =   $this->req->get('id');
        $this->comment->delete($id);
        
        $namespace  =   $this->comment->getNamespace();
        $xid        =   $this->comment->getXid();   
        return $this->doBrowse($namespace, $xid);
    }
    
    /**
     * browse comment
     * 
     * Load comments and fill template wich comments and pager. The actual
     * template is loaded from file named as the given namespace. 
     * 
     * @param string $namespace
     * @param string $xid
     * @param int $goto
     * @param int $limit
     * @return string comment list HTML
     */
    protected function doBrowse($namespace = '', $xid = 0, $goto = 0, $limit = 0)
    {
        $this->comment->setNamespace($namespace)->setXId($xid);
        $this->comment->useForm(intval($this->req->get('showform', 1)));
        
        if (empty($limit)) {
            $limit  =   null;
        }

        $info   =   array();
        $list   =   $this->comment->browse($info, $goto, $limit);
        $info['xid_js'] =   str_replace('-', '_', $info['xid']);

        $this->loadTemplates($namespace);
        
        $this->tmpl->addGlobalVars($info, 'pager_');
        $this->tmpl->addRows('list_entry', $list);
        
        return $this->tmpl->getParsedTemplate('snippet');
    }
}