.-.-.-.-.-

<?php
/**
 * @package   ats
 * @copyright Copyright (c)2011-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
 * @license   GNU General Public License version 3, or later
 */

namespace Akeeba\TicketSystem\Site\Helper;

defined('_JEXEC') or die();

/**
 * HTML to plain text conversion helper
 *
 * This helper will convert an HTML formatted page / email into its plain text representation. We use this to
 * automatically convert HTML email into plaintext for mail clients which either prefer plain-text or cannot understand
 * HTML email at all.
 *
 * This class has been modified by Akeeba Ltd for use in Akeeba Ticket System and no longer accuratley represents the
 * original work. The copyright header of the original class follows:
 *
 * =====================================================================================================================
 * Copyright (c) 2005-2007 Jon Abernathy <jon@chuggnutt.com>
 *
 * This script is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The GNU General Public License can be found at
 * http://www.gnu.org/copyleft/gpl.html.
 *
 * This script is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * =====================================================================================================================
 *
 * @see https://github.com/mtibben/html2text/blob/master/src/Html2Text.php
 */
class Html2Text
{
	const ENCODING = 'UTF-8';

protected $htmlFuncFlags;

/**
	 * Contains the HTML content to convert.
	 *
	 * @var  string
	 */
	protected $html;

/**
	 * Contains the converted, formatted text.
	 *
	 * @var  string
	 */
	protected $text;

/**
	 * List of preg* regular expression patterns to search for,
	 * used in conjunction with $replace.
	 *
	 * @var  array
	 * @see  $replace
	 */
	protected $search = [
		"/\r/",                                           // Non-legal carriage return
		"/[\n\t]+/",                                      // Newlines and tabs
		'/<head\b[^>]*>.*?<\/head>/i',                    // <head>
		'/<script\b[^>]*>.*?<\/script>/i',                // <script>s -- which strip_tags supposedly has problems with
		'/<style\b[^>]*>.*?<\/style>/i',                  // <style>s -- which strip_tags supposedly has problems with
		'/<i\b[^>]*>(.*?)<\/i>/i',                        // <i>
		'/<em\b[^>]*>(.*?)<\/em>/i',                      // <em>
		'/(<ul\b[^>]*>|<\/ul>)/i',                        // <ul> and </ul>
		'/(<ol\b[^>]*>|<\/ol>)/i',                        // <ol> and </ol>
		'/(<dl\b[^>]*>|<\/dl>)/i',                        // <dl> and </dl>
		'/<li\b[^>]*>(.*?)<\/li>/i',                      // <li> and </li>
		'/<dd\b[^>]*>(.*?)<\/dd>/i',                      // <dd> and </dd>
		'/<dt\b[^>]*>(.*?)<\/dt>/i',                      // <dt> and </dt>
		'/<li\b[^>]*>/i',                                 // <li>
		'/<hr\b[^>]*>/i',                                 // <hr>
		'/<div\b[^>]*>/i',                                // <div>
		'/(<table\b[^>]*>|<\/table>)/i',                  // <table> and </table>
		'/(<tr\b[^>]*>|<\/tr>)/i',                        // <tr> and </tr>
		'/<td\b[^>]*>(.*?)<\/td>/i',                      // <td> and </td>
		'/<span class="_html2text_ignore">.+?<\/span>/i', // <span class="_html2text_ignore">...</span>
		'/<(img)\b[^>]*alt=\"([^>"]+)\"[^>]*>/i',         // <img> with alt tag
	];

/**
	 * List of pattern replacements corresponding to patterns searched.
	 *
	 * @var array
	 * @see $search
	 */
	protected $replace = [
		'',                              // Non-legal carriage return
		' ',                             // Newlines and tabs
		'',                              // <head>
		'',                              // <script>s -- which strip_tags supposedly has problems with
		'',                              // <style>s -- which strip_tags supposedly has problems with
		'_\\1_',                         // <i>
		'_\\1_',                         // <em>
		"\n\n",                          // <ul> and </ul>
		"\n\n",                          // <ol> and </ol>
		"\n\n",                          // <dl> and </dl>
		"\t* \\1\n",                     // <li> and </li>
		" \\1\n",                        // <dd> and </dd>
		"\t* \\1",                       // <dt> and </dt>
		"\n\t* ",                        // <li>
		"\n-------------------------\n", // <hr>
		"<div>\n",                       // <div>
		"\n\n",                          // <table> and </table>
		"\n",                            // <tr> and </tr>
		"\t\t\\1\n",                     // <td> and </td>
		"",                              // <span class="_html2text_ignore">...</span>
		'[\\2]',                         // <img> with alt tag
	];

/**
	 * List of preg* regular expression patterns to search for,
	 * used in conjunction with $entReplace.
	 *
	 * @var  array
	 * @see  $entReplace
	 */
	protected $entSearch = [
		'/&#153;/i',                                     // TM symbol in win-1252
		'/&#151;/i',                                     // m-dash in win-1252
		'/&(amp|#38);/i',                                // Ampersand: see converter()
		'/[ ]{2,}/',                                     // Runs of spaces, post-handling
	];

/**
	 * List of pattern replacements corresponding to patterns searched.
	 *
	 * @var  array
	 * @see  $entSearch
	 */
	protected $entReplace = [
		'™',         // TM symbol
		'—',         // m-dash
		'|+|amp|+|', // Ampersand: see converter()
		' ',         // Runs of spaces, post-handling
	];

/**
	 * List of preg* regular expression patterns to search for
	 * and replace using callback function.
	 *
	 * @var  array
	 */
	protected $callbackSearch = [
		'/<(h)[123456]( [^>]*)?>(.*?)<\/h[123456]>/i',           // h1 - h6
		'/[ ]*<(p)( [^>]*)?>(.*?)<\/p>[ ]*/si',                  // <p> with surrounding whitespace.
		'/<(br)[^>]*>[ ]*/i',                                    // <br> with leading whitespace after the newline.
		'/<(b)( [^>]*)?>(.*?)<\/b>/i',                           // <b>
		'/<(strong)( [^>]*)?>(.*?)<\/strong>/i',                 // <strong>
		'/<(th)( [^>]*)?>(.*?)<\/th>/i',                         // <th> and </th>
		'/<(a) [^>]*href=("|\')([^"\']+)\2([^>]*)>(.*?)<\/a>/i'  // <a href="">
	];

/**
	 * List of preg* regular expression patterns to search for in PRE body,
	 * used in conjunction with $preReplace.
	 *
	 * @var  array
	 * @see  $preReplace
	 */
	protected $preSearch = [
		"/\n/",
		"/\t/",
		'/ /',
		'/<pre[^>]*>/',
		'/<\/pre>/',
	];

/**
	 * List of pattern replacements corresponding to patterns searched for PRE body.
	 *
	 * @var  array
	 * @see  $preSearch
	 */
	protected $preReplace = [
		'<br>',
		'&nbsp;&nbsp;&nbsp;&nbsp;',
		'&nbsp;',
		'',
		'',
	];

/**
	 * Temporary workspace used during PRE processing.
	 *
	 * @var  string
	 */
	protected $preContent = '';

/**
	 * Contains the base URL that relative links should resolve to.
	 *
	 * @var  string
	 */
	protected $baseurl = '';

/**
	 * Indicates whether content in the $html variable has been converted yet.
	 *
	 * @var bool
	 * @see $html, $text
	 */
	protected $converted = false;

/**
	 * Contains URL addresses from links to be rendered in plain text.
	 *
	 * @var  array
	 * @see  buildlinkList()
	 */
	protected $linkList = [];

/**
	 * Various configuration options (able to be set in the constructor)
	 *
	 * @var  array
	 */
	protected $options = [
		'do_links' => 'inline', // 'none'
		// 'inline' (show links inline)
		// 'nextline' (show links on the next line)
		// 'table' (if a table of link URLs should be listed after the text.
		// 'bbcode' (show links as bbcode)

'width' => 70,          //  Maximum width of the formatted text, in columns.
		//  Set this value to 0 (or less) to ignore word wrapping
		//  and not constrain text to a fixed-width column.
	];

/**
	 * @param   string  $html     Source HTML
	 * @param   array   $options  Set configuration options
	 */
	public function __construct($html = '', $options = [])
	{
		$this->html          = $html;
		$this->options       = array_merge($this->options, $options);
		$this->htmlFuncFlags = (PHP_VERSION_ID < 50400)
			? ENT_COMPAT
			: ENT_COMPAT | ENT_HTML5;
	}

/**
	 * Get the source HTML
	 *
	 * @return string
	 */
	public function getHtml()
	{
		return $this->html;
	}

/**
	 * Returns the text, converted from HTML.
	 *
	 * @return string
	 */
	public function getText()
	{
		if (!$this->converted)
		{
			$this->convert();
		}

return $this->text;
	}

protected function convert()
	{
		$origEncoding = mb_internal_encoding();
		mb_internal_encoding(self::ENCODING);

$this->doConvert();

mb_internal_encoding($origEncoding);
	}

protected function doConvert()
	{
		$this->linkList = [];

$text = trim($this->html);

$this->converter($text);

if ($this->linkList)
		{
			$text .= "\n\nLinks:\n------\n";
			foreach ($this->linkList as $i => $url)
			{
				$text .= '[' . ($i + 1) . '] ' . $url . "\n";
			}
		}

$this->text = $text;

$this->converted = true;
	}

protected function converter(&$text)
	{
		$this->convertBlockquotes($text);
		$this->convertPre($text);
		$text = preg_replace($this->search, $this->replace, $text);
		$text = preg_replace_callback($this->callbackSearch, [$this, 'pregCallback'], $text);
		$text = strip_tags($text);
		$text = preg_replace($this->entSearch, $this->entReplace, $text);
		$text = html_entity_decode($text, $this->htmlFuncFlags, self::ENCODING);

// Remove unknown/unhandled entities (this cannot be done in search-and-replace block)
		$text = preg_replace('/&([a-zA-Z0-9]{2,6}|#[0-9]{2,4});/', '', $text);

// Convert "|+|amp|+|" into "&", need to be done after handling of unknown entities
		// This properly handles situation of "&amp;quot;" in input string
		$text = str_replace('|+|amp|+|', '&', $text);

// Normalise empty lines
		$text = preg_replace("/\n\s+\n/", "\n\n", $text);
		$text = preg_replace("/[\n]{3,}/", "\n\n", $text);

// remove leading empty lines (can be produced by eg. P tag on the beginning)
		$text = ltrim($text, "\n");

if ($this->options['width'] > 0)
		{
			$text = wordwrap($text, $this->options['width']);
		}
	}

/**
	 * Helper function called by preg_replace() on link replacement.
	 *
	 * Maintains an internal list of links to be displayed at the end of the
	 * text, with numeric indices to the original point in the text they
	 * appeared. Also makes an effort at identifying and handling absolute
	 * and relative links.
	 *
	 * @param   string  $link     URL of the link
	 * @param   string  $display  Part of the text to associate number with
	 * @param   null    $linkOverride
	 *
	 * @return string
	 */
	protected function buildlinkList($link, $display, $linkOverride = null)
	{
		$linkMethod = ($linkOverride) ? $linkOverride : $this->options['do_links'];
		if ($linkMethod == 'none')
		{
			return $display;
		}

// Ignored link types
		if (preg_match('!^(javascript:|mailto:|#)!i', $link))
		{
			return $display;
		}

if (preg_match('!^([a-z][a-z0-9.+-]+:)!i', $link))
		{
			$url = $link;
		}
		else
		{
			$url = $this->baseurl;
			if (mb_substr($link, 0, 1) != '/')
			{
				$url .= '/';
			}
			$url .= $link;
		}

if ($linkMethod == 'table')
		{
			if (($index = array_search($url, $this->linkList)) === false)
			{
				$index            = count($this->linkList);
				$this->linkList[] = $url;
			}

return $display . ' [' . ($index + 1) . ']';
		}
		elseif ($linkMethod == 'nextline')
		{
			if ($url === $display)
			{
				return $display;
			}

return $display . "\n[" . $url . ']';
		}
		elseif ($linkMethod == 'bbcode')
		{
			return sprintf('[url=%s]%s[/url]', $url, $display);
		}
		else
		{ // link_method defaults to inline
			if ($url === $display)
			{
				return $display;
			}

return $display . ' [' . $url . ']';
		}
	}

protected function convertPre(&$text)
	{
		// get the content of PRE element
		while (preg_match('/<pre[^>]*>(.*)<\/pre>/ismU', $text, $matches))
		{
			// Replace br tags with newlines to prevent the search-and-replace callback from killing whitespace
			$this->preContent = preg_replace('/(<br\b[^>]*>)/i', "\n", $matches[1]);

// Run our defined tags search-and-replace with callback
			$this->preContent = preg_replace_callback(
				$this->callbackSearch,
				[$this, 'pregCallback'],
				$this->preContent
			);

// convert the content
			$this->preContent = sprintf(
				'<div><br>%s<br></div>',
				preg_replace($this->preSearch, $this->preReplace, $this->preContent)
			);

// replace the content (use callback because content can contain $0 variable)
			$text = preg_replace_callback(
				'/<pre[^>]*>.*<\/pre>/ismU',
				[$this, 'pregPreCallback'],
				$text,
				1
			);

// free memory
			$this->preContent = '';
		}
	}

/**
	 * Helper function for BLOCKQUOTE body conversion.
	 *
	 * @param   string  $text  HTML content
	 */
	protected function convertBlockquotes(&$text)
	{
		$foundBlockQuote = preg_match_all('/<\/*blockquote[^>]*>/i', $text, $matches, PREG_OFFSET_CAPTURE);

if (!$foundBlockQuote)
		{
			return;
		}

$originalText = $text;
		$start        = 0;
		$taglen       = 0;
		$level        = 0;
		$diff         = 0;

foreach ($matches[0] as $m)
		{
			$m[1] = mb_strlen(substr($originalText, 0, $m[1]));

if ($m[0][0] == '<' && $m[0][1] == '/')
			{
				$level--;

if ($level < 0)
				{
					// Malformed HTML: go to next blockquote
					$level = 0;

continue;
				}

if ($level > 0)
				{
					continue;
				}

$end = $m[1];
				$len = $end - $taglen - $start;
				// Get blockquote content
				$body = mb_substr($text, $start + $taglen - $diff, $len);

// Set text width
				$pWidth = $this->options['width'];

if ($this->options['width'] > 0)
				{
					$this->options['width'] -= 2;
				}

// Convert blockquote content
				$body = trim($body);
				$this->converter($body);

// Add citation markers and create PRE block
				$body = preg_replace('/((^|\n)>*)/', '\\1> ', trim($body));
				$body = '<pre>' . htmlspecialchars($body, $this->htmlFuncFlags, self::ENCODING) . '</pre>';

// Re-set text width
				$this->options['width'] = $pWidth;

// Replace content
				$text = mb_substr($text, 0, $start - $diff)
					. $body
					. mb_substr($text, $end + mb_strlen($m[0]) - $diff);

$diff += $len + $taglen + mb_strlen($m[0]) - mb_strlen($body);

unset($body);

continue;
			}

if ($level == 0)
			{
				$start  = $m[1];
				$taglen = mb_strlen($m[0]);
			}
			$level++;
		}
	}

/**
	 * Callback function for preg_replace_callback use.
	 *
	 * @param   array  $matches  PREG matches
	 *
	 * @return string
	 */
	protected function pregCallback($matches)
	{
		switch (mb_strtolower($matches[1]))
		{
			case 'p':
				// Replace newlines with spaces.
				$para = str_replace("\n", " ", $matches[3]);

// Trim trailing and leading whitespace within the tag.
				$para = trim($para);

// Add trailing newlines for this para.
				return "\n" . $para . "\n";
				break;

case 'br':
				return "\n";
				break;

case 'b':
			case 'strong':
				return $this->toUpper($matches[3]);
				break;

case 'th':
				return $this->toUpper("\t\t" . $matches[3] . "\n");
				break;

case 'h':
				return $this->toUpper("\n\n" . $matches[3] . "\n\n");
				break;

case 'a':
				// override the link method
				$linkOverride = null;
				if (preg_match('/_html2text_link_(\w+)/', $matches[4], $linkOverrideMatch))
				{
					$linkOverride = $linkOverrideMatch[1];
				}
				// Remove spaces in URL (#1487805)
				$url = str_replace(' ', '', $matches[3]);

return $this->buildlinkList($url, $matches[5], $linkOverride);
				break;

default:
				return '';
				break;
		}
	}

/**
	 * Callback function for preg_replace_callback use in PRE content handler.
	 *
	 * @param   array  $matches  PREG matches
	 *
	 * @return string
	 */
	protected function pregPreCallback(/** @noinspection PhpUnusedParameterInspection */ $matches)
	{
		return $this->preContent;
	}

/**
	 * Strtoupper function with HTML tags and entities handling.
	 *
	 * @param   string  $str  Text to convert
	 *
	 * @return string Converted text
	 */
	protected function toUpper($str)
	{
		// string can contain HTML tags
		$chunks = preg_split('/(<[^>]*>)/', $str, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);

// convert toupper only the text between HTML tags
		foreach ($chunks as $i => $chunk)
		{
			if ($chunk[0] != '<')
			{
				$chunks[$i] = $this->strToUpper($chunk);
			}
		}

return implode($chunks);
	}

/**
	 * Strtoupper multibyte wrapper function with HTML entities handling.
	 *
	 * @param   string  $str  Text to convert
	 *
	 * @return string Converted text
	 */
	protected function strToUpper($str)
	{
		$str = html_entity_decode($str, $this->htmlFuncFlags, self::ENCODING);
		$str = mb_strtoupper($str);
		$str = htmlspecialchars($str, $this->htmlFuncFlags, self::ENCODING);

return $str;
	}
}

/var/www/consult-e-syn/public_html/643de/../components/com_ats/tmpl/../Helper/Html2Text.php