]> git.mxchange.org Git - friendica.git/commitdiff
Create Content\Text\HTML class
authorHypolite Petovan <mrpetovan@gmail.com>
Wed, 7 Mar 2018 21:20:04 +0000 (16:20 -0500)
committerHypolite Petovan <mrpetovan@gmail.com>
Wed, 7 Mar 2018 21:20:04 +0000 (16:20 -0500)
- Move BBCode::cleanCss to HTML::sanitizeCSS

src/Content/Text/BBCode.php
src/Content/Text/HTML.php [new file with mode: 0644]

index 9c7dac26052fa7c302da98e89fd6e73d2684d88d..2e9af5a249efa16db7c397b529108e2ea1a20b64 100644 (file)
@@ -764,27 +764,6 @@ class BBCode extends BaseObject
                return $text . "\n" . $data["after"];
        }
 
-       private static function cleanCss($input)
-       {
-               $cleaned = "";
-
-               $input = strtolower($input);
-
-               for ($i = 0; $i < strlen($input); $i++) {
-                       $char = substr($input, $i, 1);
-
-                       if (($char >= "a") && ($char <= "z")) {
-                               $cleaned .= $char;
-                       }
-
-                       if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
-                               $cleaned .= $char;
-                       }
-               }
-
-               return $cleaned;
-       }
-
        /**
         * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
         *
@@ -1629,7 +1608,7 @@ class BBCode extends BaseObject
                $text = preg_replace_callback(
                        "(\[style=(.*?)\](.*?)\[\/style\])ism",
                        function ($match) {
-                               return "<span style=\"" . self::cleanCss($match[1]) . ";\">" . $match[2] . "</span>";
+                               return "<span style=\"" . HTML::sanitizeCSS($match[1]) . ";\">" . $match[2] . "</span>";
                        },
                        $text
                );
@@ -1638,7 +1617,7 @@ class BBCode extends BaseObject
                $text = preg_replace_callback(
                        "(\[class=(.*?)\](.*?)\[\/class\])ism",
                        function ($match) {
-                               return "<span class=\"" . self::cleanCss($match[1]) . "\">" . $match[2] . "</span>";
+                               return "<span class=\"" . HTML::sanitizeCSS($match[1]) . "\">" . $match[2] . "</span>";
                        },
                        $text
                );
diff --git a/src/Content/Text/HTML.php b/src/Content/Text/HTML.php
new file mode 100644 (file)
index 0000000..f82a254
--- /dev/null
@@ -0,0 +1,674 @@
+<?php
+
+/**
+ * @file src/Content/Text/HTML.php
+ */
+
+namespace Friendica\Content\Text;
+
+use DOMDocument;
+use DOMXPath;
+use Friendica\Core\Addon;
+use Friendica\Util\Network;
+use Friendica\Util\XML;
+
+class HTML
+{
+       public static function sanitizeCSS($input)
+       {
+               $cleaned = "";
+
+               $input = strtolower($input);
+
+               for ($i = 0; $i < strlen($input); $i++) {
+                       $char = substr($input, $i, 1);
+
+                       if (($char >= "a") && ($char <= "z")) {
+                               $cleaned .= $char;
+                       }
+
+                       if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
+                               $cleaned .= $char;
+                       }
+               }
+
+               return $cleaned;
+       }
+
+       private static function tagToBBCode(DOMDocument $doc, $tag, $attributes, $startbb, $endbb)
+       {
+               do {
+                       $done = self::tagToBBCodeSub($doc, $tag, $attributes, $startbb, $endbb);
+               } while ($done);
+       }
+
+       private static function tagToBBCodeSub(DOMDocument $doc, $tag, $attributes, $startbb, $endbb)
+       {
+               $savestart = str_replace('$', '\x01', $startbb);
+               $replace = false;
+
+               $xpath = new DOMXPath($doc);
+
+               $list = $xpath->query("//" . $tag);
+               foreach ($list as $node) {
+                       $attr = [];
+                       if ($node->attributes->length) {
+                               foreach ($node->attributes as $attribute) {
+                                       $attr[$attribute->name] = $attribute->value;
+                               }
+                       }
+
+                       $replace = true;
+
+                       $startbb = $savestart;
+
+                       $i = 0;
+
+                       foreach ($attributes as $attribute => $value) {
+                               $startbb = str_replace('\x01' . ++$i, '$1', $startbb);
+                               if (strpos('*' . $startbb, '$1') > 0) {
+                                       if ($replace && (@$attr[$attribute] != '')) {
+                                               $startbb = preg_replace($value, $startbb, $attr[$attribute], -1, $count);
+
+                                               // If nothing could be changed
+                                               if ($count == 0) {
+                                                       $replace = false;
+                                               }
+                                       } else {
+                                               $replace = false;
+                                       }
+                               } else {
+                                       if (@$attr[$attribute] != $value) {
+                                               $replace = false;
+                                       }
+                               }
+                       }
+
+                       if ($replace) {
+                               $StartCode = $doc->createTextNode($startbb);
+                               $EndCode = $doc->createTextNode($endbb);
+
+                               $node->parentNode->insertBefore($StartCode, $node);
+
+                               if ($node->hasChildNodes()) {
+                                       foreach ($node->childNodes as $child) {
+                                               $newNode = $child->cloneNode(true);
+                                               $node->parentNode->insertBefore($newNode, $node);
+                                       }
+                               }
+
+                               $node->parentNode->insertBefore($EndCode, $node);
+                               $node->parentNode->removeChild($node);
+                       }
+               }
+
+               return $replace;
+       }
+
+       /**
+        * Made by: ike@piratenpartei.de
+        * Originally made for the syncom project: http://wiki.piratenpartei.de/Syncom
+        *                                      https://github.com/annando/Syncom
+        *
+        * @brief Converter for HTML to BBCode
+        * @param string $message
+        * @param string $basepath
+        * @return string
+        */
+       public static function toBBCode($message, $basepath = '')
+       {
+               $message = str_replace("\r", "", $message);
+
+               // Removing code blocks before the whitespace removal processing below
+               $codeblocks = [];
+               $message = preg_replace_callback(
+                       '#<pre><code(?: class="([^"]*)")?>(.*)</code></pre>#iUs',
+                       function ($matches) use (&$codeblocks) {
+                               $return = '[codeblock-' . count($codeblocks) . ']';
+
+                               $prefix = '[code]';
+                               if ($matches[1] != '') {
+                                       $prefix = '[code=' . $matches[1] . ']';
+                               }
+
+                               $codeblocks[] = $prefix . trim($matches[2]) . '[/code]';
+                               return $return;
+                       },
+                       $message
+               );
+
+               $message = str_replace(
+                       [
+                       "<li><p>",
+                       "</p></li>",
+                       ], [
+                       "<li>",
+                       "</li>",
+                       ], $message
+               );
+
+               // remove namespaces
+               $message = preg_replace('=<(\w+):(.+?)>=', '<removeme>', $message);
+               $message = preg_replace('=</(\w+):(.+?)>=', '</removeme>', $message);
+
+               $doc = new DOMDocument();
+               $doc->preserveWhiteSpace = false;
+
+               $message = mb_convert_encoding($message, 'HTML-ENTITIES', "UTF-8");
+
+               @$doc->loadHTML($message);
+
+               XML::deleteNode($doc, 'style');
+               XML::deleteNode($doc, 'head');
+               XML::deleteNode($doc, 'title');
+               XML::deleteNode($doc, 'meta');
+               XML::deleteNode($doc, 'xml');
+               XML::deleteNode($doc, 'removeme');
+
+               $xpath = new DomXPath($doc);
+               $list = $xpath->query("//pre");
+               foreach ($list as $node) {
+                       $node->nodeValue = str_replace("\n", "\r", $node->nodeValue);
+               }
+
+               $message = $doc->saveHTML();
+               $message = str_replace(["\n<", ">\n", "\r", "\n", "\xC3\x82\xC2\xA0"], ["<", ">", "<br />", " ", ""], $message);
+               $message = preg_replace('= [\s]*=i', " ", $message);
+               @$doc->loadHTML($message);
+
+               self::tagToBBCode($doc, 'html', [], "", "");
+               self::tagToBBCode($doc, 'body', [], "", "");
+
+               // Outlook-Quote - Variant 1
+               self::tagToBBCode($doc, 'p', ['class' => 'MsoNormal', 'style' => 'margin-left:35.4pt'], '[quote]', '[/quote]');
+
+               // Outlook-Quote - Variant 2
+               self::tagToBBCode($doc, 'div', ['style' => 'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'],
+                       '[quote]', '[/quote]');
+
+               // MyBB-Stuff
+               self::tagToBBCode($doc, 'span', ['style' => 'text-decoration: underline;'], '[u]', '[/u]');
+               self::tagToBBCode($doc, 'span', ['style' => 'font-style: italic;'], '[i]', '[/i]');
+               self::tagToBBCode($doc, 'span', ['style' => 'font-weight: bold;'], '[b]', '[/b]');
+
+               /* self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/', 'size'=>'/(\d+)/', 'color'=>'/(.+)/'), '[font=$1][size=$2][color=$3]', '[/color][/size][/font]');
+                 self::node2BBCode($doc, 'font', array('size'=>'/(\d+)/', 'color'=>'/(.+)/'), '[size=$1][color=$2]', '[/color][/size]');
+                 self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/', 'size'=>'/(.+)/'), '[font=$1][size=$2]', '[/size][/font]');
+                 self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/', 'color'=>'/(.+)/'), '[font=$1][color=$3]', '[/color][/font]');
+                 self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/'), '[font=$1]', '[/font]');
+                 self::node2BBCode($doc, 'font', array('size'=>'/(\d+)/'), '[size=$1]', '[/size]');
+                 self::node2BBCode($doc, 'font', array('color'=>'/(.+)/'), '[color=$1]', '[/color]');
+                */
+               // Untested
+               //self::node2BBCode($doc, 'span', array('style'=>'/.*font-size:\s*(.+?)[,;].*font-family:\s*(.+?)[,;].*color:\s*(.+?)[,;].*/'), '[size=$1][font=$2][color=$3]', '[/color][/font][/size]');
+               //self::node2BBCode($doc, 'span', array('style'=>'/.*font-size:\s*(\d+)[,;].*/'), '[size=$1]', '[/size]');
+               //self::node2BBCode($doc, 'span', array('style'=>'/.*font-size:\s*(.+?)[,;].*/'), '[size=$1]', '[/size]');
+
+               self::tagToBBCode($doc, 'span', ['style' => '/.*color:\s*(.+?)[,;].*/'], '[color="$1"]', '[/color]');
+
+               //self::node2BBCode($doc, 'span', array('style'=>'/.*font-family:\s*(.+?)[,;].*/'), '[font=$1]', '[/font]');
+               //self::node2BBCode($doc, 'div', array('style'=>'/.*font-family:\s*(.+?)[,;].*font-size:\s*(\d+?)pt.*/'), '[font=$1][size=$2]', '[/size][/font]');
+               //self::node2BBCode($doc, 'div', array('style'=>'/.*font-family:\s*(.+?)[,;].*font-size:\s*(\d+?)px.*/'), '[font=$1][size=$2]', '[/size][/font]');
+               //self::node2BBCode($doc, 'div', array('style'=>'/.*font-family:\s*(.+?)[,;].*/'), '[font=$1]', '[/font]');
+               // Importing the classes - interesting for importing of posts from third party networks that were exported from friendica
+               // Test
+               //self::node2BBCode($doc, 'span', array('class'=>'/([\w ]+)/'), '[class=$1]', '[/class]');
+               self::tagToBBCode($doc, 'span', ['class' => 'type-link'], '[class=type-link]', '[/class]');
+               self::tagToBBCode($doc, 'span', ['class' => 'type-video'], '[class=type-video]', '[/class]');
+
+               self::tagToBBCode($doc, 'strong', [], '[b]', '[/b]');
+               self::tagToBBCode($doc, 'em', [], '[i]', '[/i]');
+               self::tagToBBCode($doc, 'b', [], '[b]', '[/b]');
+               self::tagToBBCode($doc, 'i', [], '[i]', '[/i]');
+               self::tagToBBCode($doc, 'u', [], '[u]', '[/u]');
+
+               self::tagToBBCode($doc, 'big', [], "[size=large]", "[/size]");
+               self::tagToBBCode($doc, 'small', [], "[size=small]", "[/size]");
+
+               self::tagToBBCode($doc, 'blockquote', [], '[quote]', '[/quote]');
+
+               self::tagToBBCode($doc, 'br', [], "\n", '');
+
+               self::tagToBBCode($doc, 'p', ['class' => 'MsoNormal'], "\n", "");
+               self::tagToBBCode($doc, 'div', ['class' => 'MsoNormal'], "\r", "");
+
+               self::tagToBBCode($doc, 'span', [], "", "");
+
+               self::tagToBBCode($doc, 'span', [], "", "");
+               self::tagToBBCode($doc, 'pre', [], "", "");
+
+               self::tagToBBCode($doc, 'div', [], "\r", "\r");
+               self::tagToBBCode($doc, 'p', [], "\n", "\n");
+
+               self::tagToBBCode($doc, 'ul', [], "[list]", "[/list]");
+               self::tagToBBCode($doc, 'ol', [], "[list=1]", "[/list]");
+               self::tagToBBCode($doc, 'li', [], "[*]", "");
+
+               self::tagToBBCode($doc, 'hr', [], "[hr]", "");
+
+               self::tagToBBCode($doc, 'table', [], "", "");
+               self::tagToBBCode($doc, 'tr', [], "\n", "");
+               self::tagToBBCode($doc, 'td', [], "\t", "");
+               //self::node2BBCode($doc, 'table', array(), "[table]", "[/table]");
+               //self::node2BBCode($doc, 'th', array(), "[th]", "[/th]");
+               //self::node2BBCode($doc, 'tr', array(), "[tr]", "[/tr]");
+               //self::node2BBCode($doc, 'td', array(), "[td]", "[/td]");
+               //self::node2BBCode($doc, 'h1', array(), "\n\n[size=xx-large][b]", "[/b][/size]\n");
+               //self::node2BBCode($doc, 'h2', array(), "\n\n[size=x-large][b]", "[/b][/size]\n");
+               //self::node2BBCode($doc, 'h3', array(), "\n\n[size=large][b]", "[/b][/size]\n");
+               //self::node2BBCode($doc, 'h4', array(), "\n\n[size=medium][b]", "[/b][/size]\n");
+               //self::node2BBCode($doc, 'h5', array(), "\n\n[size=small][b]", "[/b][/size]\n");
+               //self::node2BBCode($doc, 'h6', array(), "\n\n[size=x-small][b]", "[/b][/size]\n");
+
+               self::tagToBBCode($doc, 'h1', [], "[h1]", "[/h1]");
+               self::tagToBBCode($doc, 'h2', [], "[h2]", "[/h2]");
+               self::tagToBBCode($doc, 'h3', [], "[h3]", "[/h3]");
+               self::tagToBBCode($doc, 'h4', [], "[h4]", "[/h4]");
+               self::tagToBBCode($doc, 'h5', [], "[h5]", "[/h5]");
+               self::tagToBBCode($doc, 'h6', [], "[h6]", "[/h6]");
+
+               self::tagToBBCode($doc, 'a', ['href' => '/mailto:(.+)/'], '[mail=$1]', '[/mail]');
+               self::tagToBBCode($doc, 'a', ['href' => '/(.+)/'], '[url=$1]', '[/url]');
+
+               self::tagToBBCode($doc, 'img', ['src' => '/(.+)/', 'width' => '/(\d+)/', 'height' => '/(\d+)/'], '[img=$2x$3]$1',
+                       '[/img]');
+               self::tagToBBCode($doc, 'img', ['src' => '/(.+)/'], '[img]$1', '[/img]');
+
+
+               self::tagToBBCode($doc, 'video', ['src' => '/(.+)/'], '[video]$1', '[/video]');
+               self::tagToBBCode($doc, 'audio', ['src' => '/(.+)/'], '[audio]$1', '[/audio]');
+               self::tagToBBCode($doc, 'iframe', ['src' => '/(.+)/'], '[iframe]$1', '[/iframe]');
+
+               self::tagToBBCode($doc, 'key', [], '[code]', '[/code]');
+               self::tagToBBCode($doc, 'code', [], '[code]', '[/code]');
+
+               $message = $doc->saveHTML();
+
+               // I'm removing something really disturbing
+               // Don't know exactly what it is
+               $message = str_replace(chr(194) . chr(160), ' ', $message);
+
+               $message = str_replace("&nbsp;", " ", $message);
+
+               // removing multiple DIVs
+               $message = preg_replace('=\r *\r=i', "\n", $message);
+               $message = str_replace("\r", "\n", $message);
+
+               Addon::callHooks('html2bbcode', $message);
+
+               $message = strip_tags($message);
+
+               $message = html_entity_decode($message, ENT_QUOTES, 'UTF-8');
+
+               $message = str_replace(["<"], ["&lt;"], $message);
+
+               // remove quotes if they don't make sense
+               $message = preg_replace('=\[/quote\][\s]*\[quote\]=i', "\n", $message);
+
+               $message = preg_replace('=\[quote\]\s*=i', "[quote]", $message);
+               $message = preg_replace('=\s*\[/quote\]=i', "[/quote]", $message);
+
+               do {
+                       $oldmessage = $message;
+                       $message = str_replace("\n \n", "\n\n", $message);
+               } while ($oldmessage != $message);
+
+               do {
+                       $oldmessage = $message;
+                       $message = str_replace("\n\n\n", "\n\n", $message);
+               } while ($oldmessage != $message);
+
+               do {
+                       $oldmessage = $message;
+                       $message = str_replace(
+                               [
+                               "[/size]\n\n",
+                               "\n[hr]",
+                               "[hr]\n",
+                               "\n[list",
+                               "[/list]\n",
+                               "\n[/",
+                               "[list]\n",
+                               "[list=1]\n",
+                               "\n[*]"],
+                               [
+                               "[/size]\n",
+                               "[hr]",
+                               "[hr]",
+                               "[list",
+                               "[/list]",
+                               "[/",
+                               "[list]",
+                               "[list=1]",
+                               "[*]"], $message
+                       );
+               } while ($message != $oldmessage);
+
+               $message = str_replace(
+                       ['[b][b]', '[/b][/b]', '[i][i]', '[/i][/i]'], ['[b]', '[/b]', '[i]', '[/i]'], $message
+               );
+
+               // Handling Yahoo style of mails
+               $message = str_replace('[hr][b]From:[/b]', '[quote][b]From:[/b]', $message);
+
+               // Restore code blocks
+               $message = preg_replace_callback(
+                       '#\[codeblock-([0-9]+)\]#iU',
+                       function ($matches) use ($codeblocks) {
+                               $return = '';
+                               if (isset($codeblocks[intval($matches[1])])) {
+                                       $return = $codeblocks[$matches[1]];
+                               }
+                               return $return;
+                       },
+                       $message
+               );
+
+               $message = trim($message);
+
+               if ($basepath != '') {
+                       $message = self::qualifyURLs($message, $basepath);
+               }
+
+               return $message;
+       }
+
+       /**
+        * @brief Sub function to complete incomplete URL
+        *
+        * @param array  $matches  Result of preg_replace_callback
+        * @param string $basepath Basepath that is used to complete the URL
+        *
+        * @return string The expanded URL
+        */
+       private static function qualifyURLsSub($matches, $basepath)
+       {
+               $base = parse_url($basepath);
+               unset($base['query']);
+               unset($base['fragment']);
+
+               $link = $matches[0];
+               $url = $matches[1];
+
+               $parts = array_merge($base, parse_url($url));
+               $url2 = Network::unparseURL($parts);
+
+               return str_replace($url, $url2, $link);
+       }
+
+       /**
+        * @brief Complete incomplete URLs in BBCode
+        *
+        * @param string $body     Body with URLs
+        * @param string $basepath Base path that is used to complete the URL
+        *
+        * @return string Body with expanded URLs
+        */
+       private static function qualifyURLs($body, $basepath)
+       {
+               $URLSearchString = "^\[\]";
+
+               $matches = ["/\[url\=([$URLSearchString]*)\].*?\[\/url\]/ism",
+                       "/\[url\]([$URLSearchString]*)\[\/url\]/ism",
+                       "/\[img\=[0-9]*x[0-9]*\](.*?)\[\/img\]/ism",
+                       "/\[img\](.*?)\[\/img\]/ism",
+                       "/\[zmg\=[0-9]*x[0-9]*\](.*?)\[\/img\]/ism",
+                       "/\[zmg\](.*?)\[\/zmg\]/ism",
+                       "/\[video\](.*?)\[\/video\]/ism",
+                       "/\[audio\](.*?)\[\/audio\]/ism",
+               ];
+
+               foreach ($matches as $match) {
+                       $body = preg_replace_callback(
+                               $match, function ($match) use ($basepath) {
+                                       return self::qualifyURLsSub($match, $basepath);
+                               },
+                               $body
+                       );
+               }
+               return $body;
+       }
+
+       private static function breakLines($line, $level, $wraplength = 75)
+       {
+               if ($wraplength == 0) {
+                       $wraplength = 2000000;
+               }
+
+               $wraplen = $wraplength - $level;
+
+               $newlines = [];
+
+               do {
+                       $oldline = $line;
+
+                       $subline = substr($line, 0, $wraplen);
+
+                       $pos = strrpos($subline, ' ');
+
+                       if ($pos == 0) {
+                               $pos = strpos($line, ' ');
+                       }
+
+                       if (($pos > 0) && strlen($line) > $wraplen) {
+                               $newline = trim(substr($line, 0, $pos));
+                               if ($level > 0) {
+                                       $newline = str_repeat(">", $level) . ' ' . $newline;
+                               }
+
+                               $newlines[] = $newline . " ";
+                               $line = substr($line, $pos + 1);
+                       }
+               } while ((strlen($line) > $wraplen) && !($oldline == $line));
+
+               if ($level > 0) {
+                       $line = str_repeat(">", $level) . ' ' . $line;
+               }
+
+               $newlines[] = $line;
+
+               return implode($newlines, "\n");
+       }
+
+       private static function quoteLevel($message, $wraplength = 75)
+       {
+               $lines = explode("\n", $message);
+
+               $newlines = [];
+               $level = 0;
+               foreach ($lines as $line) {
+                       $line = trim($line);
+                       $startquote = false;
+                       while (strpos("*" . $line, '[quote]') > 0) {
+                               $level++;
+                               $pos = strpos($line, '[quote]');
+                               $line = substr($line, 0, $pos) . substr($line, $pos + 7);
+                               $startquote = true;
+                       }
+
+                       $currlevel = $level;
+
+                       while (strpos("*" . $line, '[/quote]') > 0) {
+                               $level--;
+                               if ($level < 0) {
+                                       $level = 0;
+                               }
+
+                               $pos = strpos($line, '[/quote]');
+                               $line = substr($line, 0, $pos) . substr($line, $pos + 8);
+                       }
+
+                       if (!$startquote || ($line != '')) {
+                               $newlines[] = self::breakLines($line, $currlevel, $wraplength);
+                       }
+               }
+
+               return implode($newlines, "\n");
+       }
+
+       private static function collectURLs($message)
+       {
+               $pattern = '/<a.*?href="(.*?)".*?>(.*?)<\/a>/is';
+               preg_match_all($pattern, $message, $result, PREG_SET_ORDER);
+
+               $urls = [];
+               foreach ($result as $treffer) {
+                       $ignore = false;
+
+                       // A list of some links that should be ignored
+                       $list = ["/user/", "/tag/", "/group/", "/profile/", "/search?search=", "/search?tag=", "mailto:", "/u/", "/node/",
+                               "//facebook.com/profile.php?id=", "//plus.google.com/", "//twitter.com/"];
+                       foreach ($list as $listitem) {
+                               if (strpos($treffer[1], $listitem) !== false) {
+                                       $ignore = true;
+                               }
+                       }
+
+                       if ((strpos($treffer[1], "//twitter.com/") !== false) && (strpos($treffer[1], "/status/") !== false)) {
+                               $ignore = false;
+                       }
+
+                       if ((strpos($treffer[1], "//plus.google.com/") !== false) && (strpos($treffer[1], "/posts") !== false)) {
+                               $ignore = false;
+                       }
+
+                       if ((strpos($treffer[1], "//plus.google.com/") !== false) && (strpos($treffer[1], "/photos") !== false)) {
+                               $ignore = false;
+                       }
+
+                       if (!$ignore) {
+                               $urls[$treffer[1]] = $treffer[1];
+                       }
+               }
+
+               return $urls;
+       }
+
+       public static function toPlaintext($html, $wraplength = 75, $compact = false)
+       {
+               global $lang;
+
+               $message = str_replace("\r", "", $html);
+
+               $doc = new DOMDocument();
+               $doc->preserveWhiteSpace = false;
+
+               $message = mb_convert_encoding($message, 'HTML-ENTITIES', "UTF-8");
+
+               @$doc->loadHTML($message);
+
+               $xpath = new DOMXPath($doc);
+               $list = $xpath->query("//pre");
+               foreach ($list as $node) {
+                       $node->nodeValue = str_replace("\n", "\r", $node->nodeValue);
+               }
+
+               $message = $doc->saveHTML();
+               $message = str_replace(["\n<", ">\n", "\r", "\n", "\xC3\x82\xC2\xA0"], ["<", ">", "<br>", " ", ""], $message);
+               $message = preg_replace('= [\s]*=i', " ", $message);
+
+               // Collecting all links
+               $urls = self::collectURLs($message);
+
+               @$doc->loadHTML($message);
+
+               self::tagToBBCode($doc, 'html', [], '', '');
+               self::tagToBBCode($doc, 'body', [], '', '');
+
+               // MyBB-Auszeichnungen
+               /*
+                 self::node2BBCode($doc, 'span', array('style'=>'text-decoration: underline;'), '_', '_');
+                 self::node2BBCode($doc, 'span', array('style'=>'font-style: italic;'), '/', '/');
+                 self::node2BBCode($doc, 'span', array('style'=>'font-weight: bold;'), '*', '*');
+
+                 self::node2BBCode($doc, 'strong', array(), '*', '*');
+                 self::node2BBCode($doc, 'b', array(), '*', '*');
+                 self::node2BBCode($doc, 'i', array(), '/', '/');
+                 self::node2BBCode($doc, 'u', array(), '_', '_');
+                */
+
+               if ($compact) {
+                       self::tagToBBCode($doc, 'blockquote', [], "»", "«");
+               } else {
+                       self::tagToBBCode($doc, 'blockquote', [], '[quote]', "[/quote]\n");
+               }
+
+               self::tagToBBCode($doc, 'br', [], "\n", '');
+
+               self::tagToBBCode($doc, 'span', [], "", "");
+               self::tagToBBCode($doc, 'pre', [], "", "");
+               self::tagToBBCode($doc, 'div', [], "\r", "\r");
+               self::tagToBBCode($doc, 'p', [], "\n", "\n");
+
+               //self::node2BBCode($doc, 'ul', array(), "\n[list]", "[/list]\n");
+               //self::node2BBCode($doc, 'ol', array(), "\n[list=1]", "[/list]\n");
+               self::tagToBBCode($doc, 'li', [], "\n* ", "\n");
+
+               self::tagToBBCode($doc, 'hr', [], "\n" . str_repeat("-", 70) . "\n", "");
+
+               self::tagToBBCode($doc, 'tr', [], "\n", "");
+               self::tagToBBCode($doc, 'td', [], "\t", "");
+
+               self::tagToBBCode($doc, 'h1', [], "\n\n*", "*\n");
+               self::tagToBBCode($doc, 'h2', [], "\n\n*", "*\n");
+               self::tagToBBCode($doc, 'h3', [], "\n\n*", "*\n");
+               self::tagToBBCode($doc, 'h4', [], "\n\n*", "*\n");
+               self::tagToBBCode($doc, 'h5', [], "\n\n*", "*\n");
+               self::tagToBBCode($doc, 'h6', [], "\n\n*", "*\n");
+
+               // Problem: there is no reliable way to detect if it is a link to a tag or profile
+               //self::node2BBCode($doc, 'a', array('href'=>'/(.+)/'), ' $1 ', ' ', true);
+               //self::node2BBCode($doc, 'a', array('href'=>'/(.+)/', 'rel'=>'oembed'), ' $1 ', '', true);
+               //self::node2BBCode($doc, 'img', array('alt'=>'/(.+)/'), '$1', '');
+               //self::node2BBCode($doc, 'img', array('title'=>'/(.+)/'), '$1', '');
+               //self::node2BBCode($doc, 'img', array(), '', '');
+               if (!$compact) {
+                       self::tagToBBCode($doc, 'img', ['src' => '/(.+)/'], ' [img]$1', '[/img] ');
+               } else {
+                       self::tagToBBCode($doc, 'img', ['src' => '/(.+)/'], ' ', ' ');
+               }
+
+               self::tagToBBCode($doc, 'iframe', ['src' => '/(.+)/'], ' $1 ', '');
+
+               $message = $doc->saveHTML();
+
+               if (!$compact) {
+                       $message = str_replace("[img]", "", $message);
+                       $message = str_replace("[/img]", "", $message);
+               }
+
+               // was ersetze ich da?
+               // Irgendein stoerrisches UTF-Zeug
+               $message = str_replace(chr(194) . chr(160), ' ', $message);
+
+               $message = str_replace("&nbsp;", " ", $message);
+
+               // Aufeinanderfolgende DIVs
+               $message = preg_replace('=\r *\r=i', "\n", $message);
+               $message = str_replace("\r", "\n", $message);
+
+               $message = strip_tags($message);
+
+               $message = html_entity_decode($message, ENT_QUOTES, 'UTF-8');
+
+               if (!$compact && ($message != '')) {
+                       foreach ($urls as $id => $url) {
+                               if ($url != '' && strpos($message, $url) === false) {
+                                       $message .= "\n" . $url . ' ';
+                               }
+                       }
+               }
+
+               $message = str_replace("\n«", "«\n", $message);
+               $message = str_replace("»\n", "\n»", $message);
+
+               do {
+                       $oldmessage = $message;
+                       $message = str_replace("\n\n\n", "\n\n", $message);
+               } while ($oldmessage != $message);
+
+               $message = self::quoteLevel(trim($message), $wraplength);
+
+               return trim($message);
+       }
+}