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<?
/**
* Bitrix Framework
* @package bitrix
* @subpackage sender
* @copyright 2001-2012 Bitrix
*/
namespace Bitrix\Fileman\Block\Content;
use Bitrix\Main\SystemException;
use Bitrix\Main\Web\DOM\Document;
use Bitrix\Main\Localization\Loc;
use Bitrix\Main\Web\DOM\CssParser;
Loc::loadMessages(__FILE__);
/**
* Class Engine
* @package Bitrix\Fileman\Block
*/
class Engine
{
const BLOCK_PLACE_ATTR = 'data-bx-block-editor-place';
const STYLIST_TAG_ATTR = 'data-bx-stylist-container';
const BLOCK_PLACE_ATTR_DEF_VALUE = 'body';
const CONTENT_SLICE = 0;
const CONTENT_JSON = 1;
/** @var BlockContent $content Block content. */
protected $content;
/** @var Document $document Document. */
protected $document;
/** @var string|null $encoding Encoding. */
protected $encoding = null;
/**
* Check string for the presence of slices.
*
* @param string $string String.
* @return bool
*/
public static function isSupported($string)
{
foreach (self::getConverters() as $converter)
{
if ($converter::isValid($string))
{
return true;
}
}
return false;
}
/**
* Create instance.
* @param Document|null $document Template document.
* @return static
*/
public static function create(Document $document = null)
{
return new static($document);
}
/**
* Engine constructor.
* @param Document|null $document Template document.
*/
public function __construct(Document $document = null)
{
$this->setDocument($document ?: new Document);
}
/**
* Set html.
*
* @param string $html Html.
* @return $this
*/
public function setHtml($html)
{
$this->document->loadHTML($html);
return $this;
}
/**
* Set document.
*
* @param Document $document Template document.
* @return $this
*/
public function setDocument(Document $document)
{
$this->document = $document;
return $this;
}
/**
* Set content string.
*
* @param string $string Content string.
* @return Engine
*/
public function setContent($string)
{
return $this->setBlockContent(static::createBlockContent($string));
}
/**
* Set block content.
*
* @param BlockContent $blockContent Block content.
* @return $this
*/
public function setBlockContent(BlockContent $blockContent)
{
$this->content = $blockContent;
$this->fill();
return $this;
}
/**
* Set encoding.
*
* @param string|null $encoding Encoding.
* @return $this
*/
public function setEncoding($encoding = null)
{
$this->encoding = $encoding;
return $this;
}
public function getDocument()
{
return $this->document;
}
public function getHtml()
{
$html = $this->document->saveHTML();
return $html ? $html : '';
}
/**
* Fill HTML template by content.
*
* @param string $htmlTemplate Html template.
* @param string $content Content.
* @param string $encoding Encoding.
* @return string
*/
public static function fillHtmlTemplate($htmlTemplate, $content, $encoding = null)
{
$instance = static::create()->setEncoding($encoding)->setHtml($htmlTemplate)->setContent($content);
if($instance->fill())
{
return $instance->getHtml() ?: $htmlTemplate;
}
else
{
return $htmlTemplate;
}
}
/**
* Fill document by content.
*
* @return bool
*/
public function fill()
{
// prepare blocks
$blocks = array();
$grouped = array();
foreach($this->content->getBlocks() as $item)
{
$grouped[$item['place']][] = $item['value'];
}
foreach($grouped as $place => $values)
{
$blocks[$place] = "\n" . implode("\n", $values) . "\n";
}
unset($grouped);
// unite styles to one string
$styles = '';
foreach($this->content->getStyles() as $item)
{
$styles .= "\n" . $item['value'];
}
if($styles && preg_match_all("#<style[\\s\\S]*?>([\\s\\S]*?)</style>#i", $styles, $matchesStyles))
{
$styles = '';
$matchesStylesCount = count($matchesStyles);
for($i = 0; $i < $matchesStylesCount; $i++)
{
$styles .= "\n" . $matchesStyles[1][$i];
}
}
// if nothing to replace, return content
if(!$styles && count($blocks) === 0)
{
return false;
}
// add styles block to head of document
if($styles)
{
$this->addStylesToDocumentHead($styles);
}
// fill places by blocks
if($blocks)
{
$this->addBlocksToDocument($blocks);
}
return true;
}
protected function addBlocksToDocument($blocks)
{
$placeList = $this->document->querySelectorAll('[' . static::BLOCK_PLACE_ATTR . ']');
if(empty($placeList))
{
return;
}
// find available places
$firstPlaceCode = null;
$bodyPlaceCode = null;
$placeListByCode = array();
foreach($placeList as $place)
{
/* @var $place \Bitrix\Main\Web\DOM\Element */
if (!$place || !$place->getAttributeNode(static::BLOCK_PLACE_ATTR))
{
continue;
}
/*
// remove child nodes
foreach($place->getChildNodesArray() as $child)
{
$place->removeChild($child);
}
*/
$placeCode = $place->getAttribute(static::BLOCK_PLACE_ATTR);
$placeListByCode[$placeCode] = $place;
if(!$firstPlaceCode)
{
$firstPlaceCode = $placeCode;
}
if(!$bodyPlaceCode && $placeCode == static::BLOCK_PLACE_ATTR_DEF_VALUE)
{
$bodyPlaceCode = $placeCode;
}
}
// group block list by existed places
$blocksByExistType = array();
foreach($blocks as $placeCode => $blockHtml)
{
// if there is no place, find body-place or first place or skip filling place
if(!array_key_exists($placeCode, $placeListByCode))
{
if($bodyPlaceCode)
{
$placeCode = $bodyPlaceCode;
}
elseif($firstPlaceCode)
{
$placeCode = $firstPlaceCode;
}
else
{
continue;
}
}
$blocksByExistType[$placeCode][] = $blockHtml;
}
//fill existed places by blocks
foreach($blocksByExistType as $placeCode => $blockHtmlList)
{
if(!array_key_exists($placeCode, $placeListByCode))
{
continue;
}
$place = $placeListByCode[$placeCode];
$place->setInnerHTML(implode("\n", $blockHtmlList));
}
}
protected function addStylesToDocumentHead($styleString)
{
$headDomElement = $this->document->getHead();
if(!$headDomElement)
{
return;
}
$styleNode = end($headDomElement->querySelectorAll('style[' . self::STYLIST_TAG_ATTR . ']'));
if(!$styleNode)
{
$styleNode = $this->document->createElement('style');
$styleNode->setAttribute('type', 'text/css');
$styleNode->setAttribute(self::STYLIST_TAG_ATTR, 'item');
$headDomElement->appendChild($styleNode);
$styleNode->appendChild($this->document->createTextNode($styleString));
}
else
{
$styleList1 = CssParser::parseCss($styleNode->getTextContent());
$styleList2 = CssParser::parseCss($styleString);
$styleList = array_merge($styleList1, $styleList2);
$styleListByKey = array();
foreach($styleList as $styleItem)
{
if(!is_array($styleListByKey[$styleItem['SELECTOR']]))
{
$styleListByKey[$styleItem['SELECTOR']] = array();
}
$styleListByKey[$styleItem['SELECTOR']] = array_merge(
$styleListByKey[$styleItem['SELECTOR']],
$styleItem['STYLE']
);
}
$stylesString = '';
foreach($styleListByKey as $selector => $declarationList)
{
$stylesString .= $selector . '{' . CssParser::getDeclarationString($declarationList) . "}\n";
}
if($stylesString)
{
$styleNode->setInnerHTML('');
$styleNode->appendChild($this->document->createTextNode($stylesString));
}
}
}
/**
* Parse string to array of block content.
*
* @param string $string String.
* @return BlockContent
* @throws SystemException
*/
protected static function createBlockContent($string)
{
foreach (self::getConverters() as $converter)
{
if ($converter::isValid($string))
{
return $converter::toArray($string);
}
}
throw new SystemException('Wrong content type.');
}
protected static function getConverters()
{
return array(
__NAMESPACE__ . '\JsonConverter',
__NAMESPACE__ . '\SliceConverter',
);
}
}