<?php
/**
 * Tag converter
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package wb
 * @subpackage Markup
 */

WBClass::load('WBMarkup_Converter');

/**
 * Tag converter
 *
 * Embed
 *
 * @version 0.2.0
 * @package wb
 * @subpackage Markup
 */
class WBMarkup_Converter_Wb_Embed extends WBMarkup_Converter
{
    const CSS_CLASS_WXML    =   'wb-wxml-dialog wb-wxml-dialog-embed';
    const CSS_CLASS_HTML    =   'wb-wxml wb-wxml-embed';

    /**
     * URL dictionary
     * @var WBDictionary_Url
     */
    protected $dict;

   /**
    * transform Xinha Tags to XML
    *
    * @todo solve problem with internal but SSL links
    * @todo implement VFSFile links
    * @param array $node to be modified document node
    * @return bool true on success
    */
    public function toXml(&$node)
    {
        $cData  =   trim(strip_tags(implode('', $node['cData'])));
        $xml    =   array(
                            'ns'            =>  'wb',
                            'tag'           =>  'embed',
                            'attributes'    =>  array(),
                            'isEmpty'       =>  $node['isEmpty'],
                            'cData'         =>  array($cData)
                        );

        $atts   =   array(
                    'title'     =>  $node['attributes']['wb:value'],
                    'urlid'     =>  $node['attributes']['urlid'],
                    'class'     =>  $node['attributes']['class']
                    );

        // strip internal classes
        if (0 == strncmp($this::CSS_CLASS_WXML, $atts['class'], strlen($this::CSS_CLASS_WXML))) {
            $atts['class']    =   trim(substr($atts['class'], strlen($this::CSS_CLASS_WXML)));
        }
        $xml['attributes']  =   $atts;
        $node               =   $xml;

        return true;
    }

   /**
    * transform Xml to Wxml (html) tags
    *
    * @param array $node to be modified document node
    * @return bool true on success
    */
    public function toWxml(&$node)
    {
        $wxml  =   array(
                            'ns'            =>  '',
                            'tag'           =>  'div',
                            'attributes'    =>  array(),
                            'isEmpty'       =>  $node['isEmpty'],
                            'cData'         =>  $node['cData']
                        );

        $atts   =   array(
                    'wb:dialog' =>  'embed',
                    'wb:value'  =>  $node['attributes']['title'],
                    'class'     =>  self::CSS_CLASS_WXML . ' ' . $node['attributes']['class'],
                    'urlid'     =>  $node['attributes']['urlid']
                    );
        $atts   =   array_merge($this->getDefaultAttributes(WBMarkup_Converter::TARGET_WXML), $atts);

        $node               =   $wxml;
        $node['attributes'] =   $atts;
        return true;
    }

   /**
    * transform XML to Html
    *
    * @param array $node to be modified document node
    * @return bool true on success
    */
    public function toHtml(&$node)
    {
        if (empty($this->dict)) {
            $this->dict =   WBClass::create('WBDictionary_URL');
        }

        try {
            $this->dict->load($node['attributes']['urlid']);
        } catch(WBException $e) {
            $node['ns']     =   '';
            $node['tag']    =   'div';
            $atts           =   array(
                                    'title' =>  $node['attributes']['title'],
                                );
            $node['attributes'] =   $atts;
            $node['cData']  =   array('invalid emded URL');

            return $node;
        }


        if (!$this->loadTemplates('default')) {

            $node['ns']     =   '';
            $node['tag']    =   'iframe';
            $atts           =   array(
                                    'title' =>  $node['attributes']['title'],
                                    'src'   =>  $this->dict->getWord(),
                                );
            if (isset($node['attributes']['class']) && strlen($node['attributes']['class'])) {
                $atts['class']  =   self::CSS_CLASS_HTML . ' ' . $node['attributes']['class'];
            }

            $atts['allow']          =   'accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture';
            $atts['frameborder']    =   0;

            $node['attributes'] =   $atts;
            return true;
        }

        $data           =   $this->dict->get();
        $data['title']  =   $node['attributes']['title'];
        $data['class']  =   $node['attributes']['class'];
        $data['href']   =   $this->dict->getWord();
        $data['cdata']  =   implode(' ', $node['cData']);
        $data['href']   =   WBString::replaceSuperPlaceholders($data['href']);

        $this->template2HtmlNode($node, $data);
        return true;
    }
}