parser.php

<?php
namespace Bitrix\Landing\Note\Source;
 
use \Bitrix\Main\Web\DOM;
use \Bitrix\Landing\Manager;
use \Bitrix\Landing\File;
 
class Parser
{
    const ACTION_DOWNLOAD_FILE = '/bitrix/tools/disk/uf.php?attachedId=#attachedId#&amp;action=download&amp;ncc=1';
 
    protected static function convertText(string $text): string
    {
        static $parser = null;
 
        if ($parser === null)
        {
            $parser = new \CTextParser;
            $parser->allow['SMILES'] = 'N';
        }
 
        // prepare before parsing
        $text = preg_replace('#\[P\]\s*\[VIDEO#s', '[VIDEO', $text);
        $text = preg_replace('#\[/VIDEO\]\s*\[/P\]#s', '[/VIDEO]', $text);
 
        $text = $parser->convertText($text);
 
        // prepare after parsing
        $text = preg_replace('#<p>\s*</p>#s', '<br/>', $text);
 
        return $text;
    }
 
    protected static function getVideoContent(string $videoSrc): ?array
    {
        if (preg_match('#^//www.youtube.com/embed/([^?]+)#i', $videoSrc, $matches))
        {
            $ytCode = $matches[1];
 
            return [
                'src' => $videoSrc,
                'source' => 'https://www.youtube.com/watch?v=' . $ytCode,
                'preview' => '//img.youtube.com/vi/' .$ytCode . '/sddefault.jpg'
            ];
        }
 
        return null;
    }
 
    protected static function getImgContent($attacheId, array $files = []): ?array
    {
        if (isset($files[$attacheId]))
        {
            $fileItem = $files[$attacheId];
            $file = \CFile::getFileArray($fileItem['file_id']);
            if (strpos($file['CONTENT_TYPE'], 'image/') === 0)
            {
                $fileIO = new \Bitrix\Main\IO\File(
                    Manager::getDocRoot() . $file['SRC']
                );
                if ($fileIO->isExists())
                {
                    $newFile = Manager::savePicture([
                        $fileItem['file_name'],
                        base64_encode($fileIO->getContents())
                    ]);
                    if ($newFile)
                    {
                        return [
                            'id' => $newFile['ID'],
                            'src' => File::getFilePath($newFile['ID'])
                        ];
                    }
                }
            }
        }
 
        return null;
    }
 
    protected static function replaceFilesInContent(string $text, array $files = []): string
    {
        $replace = [];
 
        foreach ($files as $fId => $item)
        {
            if ($item['prefix'])
            {
                $actionUrl = str_replace(
                    '#attachedId#',
                    $item['id'],
                    self::ACTION_DOWNLOAD_FILE
                );
                $replace['[DISK FILE ID=' . $fId . ']'] =
                    '<a href="' . $actionUrl . '" target="_blank">' .
                        $item['file_name'] .
                    '</a>';
            }
        }
 
        if ($replace)
        {
            $text = str_replace(
                array_keys($replace),
                array_values($replace),
                $text
            );
        }
 
        return $text;
    }
 
    protected static function getBlockFromNode(\Bitrix\Main\Web\DOM\Node $node, array $params = []): ?array
    {
        $type = 'text';
        $content = $node->getOuterHTML();
        $attrs = $node->getAttributes();
 
        // quote / code
        if (isset($attrs['class']) && in_array($attrs['class']->getValue(), ['quote', 'code']))
        {
            $type = $attrs['class']->getValue();
            $regExp = '#^<div class="' . $type . '">\s*<table class="' . $type . '"><tr><td>' .
                      '(.*?)</td></tr></table></div>$#is';
            if (preg_match($regExp, $content, $matches))
            {
                $content = $matches[1];
            }
            if ($type == 'code' && preg_match('#^<pre>(.*?)</pre>$#is', $content, $matches))
            {
                $content = $matches[1];
            }
        }
        // table
        else if (isset($attrs['class']) && $attrs['class']->getValue() == 'data-table')
        {
            $type = 'table';
        }
        // video
        else if (($node->getNodeName() == 'IFRAME') && isset($attrs['src']))
        {
            $type = 'video';
            $content = self::getVideoContent(
                $attrs['src']->getValue()
            );
        }
        // picture / file on a single line
        else if (preg_match('/^\[DISK FILE ID=([^\]]+)\]/is', trim($content), $matches))
        {
            $type = 'img';
            $content = self::getImgContent($matches[1], $params['files']);;
        }
 
        // replace files in content
        if (
            $type == 'text' &&
            isset($params['files']) &&
            is_array($params['files'])
        )
        {
            $content = self::replaceFilesInContent($content, $params['files']);
        }
 
        if ($content)
        {
            return [
                'type' => $type,
                'content' => $content
            ];
        }
 
        return null;
    }
 
    public static function textToBlocks(string $text, array $params = []): array
    {
        $count = -1;
        $blocks = [];
 
        $dom = new DOM\Document;
        $text = self::convertText($text);
        $dom->loadHTML($text);
 
        foreach ($dom->getChildNodesArray() as $child)
        {
            $bewBlock = self::getBlockFromNode($child, $params);
            if ($bewBlock)
            {
                if (
                    $blocks &&
                    $bewBlock['type'] == 'text' &&
                    $blocks[$count]['type'] == 'text'
                )
                {
                    $blocks[$count]['content'] .= $bewBlock['content'];
                }
                else
                {
                    $count++;
                    $blocks[] = $bewBlock;
                }
            }
        }
 
        // trim block content
        foreach ($blocks as $key => $item)
        {
            if ($item['type'] == 'text')
            {
                if (!trim(str_replace(['<br />', '<br/>'], '', $item['content'])))
                {
                    unset($blocks[$key]);
                }
            }
        }
 
        return array_values($blocks);
    }
}