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1 <?php
2 /**
3  * @file src/Content/Text/HTML.php
4  */
5
6 namespace Friendica\Content\Text;
7
8 use DOMDocument;
9 use DOMXPath;
10 use Friendica\Content\Feature;
11 use Friendica\Core\Addon;
12 use Friendica\Core\L10n;
13 use Friendica\Core\Config;
14 use Friendica\Core\PConfig;
15 use Friendica\Core\Protocol;
16 use Friendica\Core\Renderer;
17 use Friendica\Database\DBA;
18 use Friendica\Model\Contact;
19 use Friendica\Util\Network;
20 use Friendica\Util\Proxy as ProxyUtils;
21 use Friendica\Util\Strings;
22 use Friendica\Util\XML;
23 use League\HTMLToMarkdown\HtmlConverter;
24
25 class HTML
26 {
27         public static function sanitizeCSS($input)
28         {
29                 $cleaned = "";
30
31                 $input = strtolower($input);
32
33                 for ($i = 0; $i < strlen($input); $i++) {
34                         $char = substr($input, $i, 1);
35
36                         if (($char >= "a") && ($char <= "z")) {
37                                 $cleaned .= $char;
38                         }
39
40                         if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
41                                 $cleaned .= $char;
42                         }
43                 }
44
45                 return $cleaned;
46         }
47
48         private static function tagToBBCode(DOMDocument $doc, $tag, $attributes, $startbb, $endbb)
49         {
50                 do {
51                         $done = self::tagToBBCodeSub($doc, $tag, $attributes, $startbb, $endbb);
52                 } while ($done);
53         }
54
55         private static function tagToBBCodeSub(DOMDocument $doc, $tag, $attributes, $startbb, $endbb)
56         {
57                 $savestart = str_replace('$', '\x01', $startbb);
58                 $replace = false;
59
60                 $xpath = new DOMXPath($doc);
61
62                 $list = $xpath->query("//" . $tag);
63                 foreach ($list as $node) {
64                         $attr = [];
65                         if ($node->attributes->length) {
66                                 foreach ($node->attributes as $attribute) {
67                                         $attr[$attribute->name] = $attribute->value;
68                                 }
69                         }
70
71                         $replace = true;
72
73                         $startbb = $savestart;
74
75                         $i = 0;
76
77                         foreach ($attributes as $attribute => $value) {
78                                 $startbb = str_replace('\x01' . ++$i, '$1', $startbb);
79                                 if (strpos('*' . $startbb, '$1') > 0) {
80                                         if ($replace && (@$attr[$attribute] != '')) {
81                                                 $startbb = preg_replace($value, $startbb, $attr[$attribute], -1, $count);
82
83                                                 // If nothing could be changed
84                                                 if ($count == 0) {
85                                                         $replace = false;
86                                                 }
87                                         } else {
88                                                 $replace = false;
89                                         }
90                                 } else {
91                                         if (@$attr[$attribute] != $value) {
92                                                 $replace = false;
93                                         }
94                                 }
95                         }
96
97                         if ($replace) {
98                                 $StartCode = $doc->createTextNode($startbb);
99                                 $EndCode = $doc->createTextNode($endbb);
100
101                                 $node->parentNode->insertBefore($StartCode, $node);
102
103                                 if ($node->hasChildNodes()) {
104                                         foreach ($node->childNodes as $child) {
105                                                 $newNode = $child->cloneNode(true);
106                                                 $node->parentNode->insertBefore($newNode, $node);
107                                         }
108                                 }
109
110                                 $node->parentNode->insertBefore($EndCode, $node);
111                                 $node->parentNode->removeChild($node);
112                         }
113                 }
114
115                 return $replace;
116         }
117
118         /**
119          * Made by: ike@piratenpartei.de
120          * Originally made for the syncom project: http://wiki.piratenpartei.de/Syncom
121          *                                      https://github.com/annando/Syncom
122          *
123          * @brief Converter for HTML to BBCode
124          * @param string $message
125          * @param string $basepath
126          * @return string
127          */
128         public static function toBBCode($message, $basepath = '')
129         {
130                 $message = str_replace("\r", "", $message);
131
132                 // Removing code blocks before the whitespace removal processing below
133                 $codeblocks = [];
134                 $message = preg_replace_callback(
135                         '#<pre><code(?: class="language-([^"]*)")?>(.*)</code></pre>#iUs',
136                         function ($matches) use (&$codeblocks) {
137                                 $return = '[codeblock-' . count($codeblocks) . ']';
138
139                                 $prefix = '[code]';
140                                 if ($matches[1] != '') {
141                                         $prefix = '[code=' . $matches[1] . ']';
142                                 }
143
144                                 $codeblocks[] = $prefix . PHP_EOL . trim($matches[2]) . PHP_EOL . '[/code]';
145                                 return $return;
146                         },
147                         $message
148                 );
149
150                 $message = str_replace(
151                         [
152                                 "<li><p>",
153                                 "</p></li>",
154                         ],
155                         [
156                                 "<li>",
157                                 "</li>",
158                         ],
159                         $message
160                 );
161
162                 // remove namespaces
163                 $message = preg_replace('=<(\w+):(.+?)>=', '<removeme>', $message);
164                 $message = preg_replace('=</(\w+):(.+?)>=', '</removeme>', $message);
165
166                 $doc = new DOMDocument();
167                 $doc->preserveWhiteSpace = false;
168
169                 $message = mb_convert_encoding($message, 'HTML-ENTITIES', "UTF-8");
170
171                 @$doc->loadHTML($message);
172
173                 XML::deleteNode($doc, 'style');
174                 XML::deleteNode($doc, 'head');
175                 XML::deleteNode($doc, 'title');
176                 XML::deleteNode($doc, 'meta');
177                 XML::deleteNode($doc, 'xml');
178                 XML::deleteNode($doc, 'removeme');
179
180                 $xpath = new DomXPath($doc);
181                 $list = $xpath->query("//pre");
182                 foreach ($list as $node) {
183                         $node->nodeValue = str_replace("\n", "\r", $node->nodeValue);
184                 }
185
186                 $message = $doc->saveHTML();
187                 $message = str_replace(["\n<", ">\n", "\r", "\n", "\xC3\x82\xC2\xA0"], ["<", ">", "<br />", " ", ""], $message);
188                 $message = preg_replace('= [\s]*=i', " ", $message);
189                 @$doc->loadHTML($message);
190
191                 self::tagToBBCode($doc, 'html', [], "", "");
192                 self::tagToBBCode($doc, 'body', [], "", "");
193
194                 // Outlook-Quote - Variant 1
195                 self::tagToBBCode($doc, 'p', ['class' => 'MsoNormal', 'style' => 'margin-left:35.4pt'], '[quote]', '[/quote]');
196
197                 // Outlook-Quote - Variant 2
198                 self::tagToBBCode(
199                         $doc,
200                         'div',
201                         ['style' => 'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'],
202                         '[quote]',
203                         '[/quote]'
204                 );
205
206                 // MyBB-Stuff
207                 self::tagToBBCode($doc, 'span', ['style' => 'text-decoration: underline;'], '[u]', '[/u]');
208                 self::tagToBBCode($doc, 'span', ['style' => 'font-style: italic;'], '[i]', '[/i]');
209                 self::tagToBBCode($doc, 'span', ['style' => 'font-weight: bold;'], '[b]', '[/b]');
210
211                 /* self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/', 'size'=>'/(\d+)/', 'color'=>'/(.+)/'), '[font=$1][size=$2][color=$3]', '[/color][/size][/font]');
212                   self::node2BBCode($doc, 'font', array('size'=>'/(\d+)/', 'color'=>'/(.+)/'), '[size=$1][color=$2]', '[/color][/size]');
213                   self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/', 'size'=>'/(.+)/'), '[font=$1][size=$2]', '[/size][/font]');
214                   self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/', 'color'=>'/(.+)/'), '[font=$1][color=$3]', '[/color][/font]');
215                   self::node2BBCode($doc, 'font', array('face'=>'/([\w ]+)/'), '[font=$1]', '[/font]');
216                   self::node2BBCode($doc, 'font', array('size'=>'/(\d+)/'), '[size=$1]', '[/size]');
217                   self::node2BBCode($doc, 'font', array('color'=>'/(.+)/'), '[color=$1]', '[/color]');
218                  */
219                 // Untested
220                 //self::node2BBCode($doc, 'span', array('style'=>'/.*font-size:\s*(.+?)[,;].*font-family:\s*(.+?)[,;].*color:\s*(.+?)[,;].*/'), '[size=$1][font=$2][color=$3]', '[/color][/font][/size]');
221                 //self::node2BBCode($doc, 'span', array('style'=>'/.*font-size:\s*(\d+)[,;].*/'), '[size=$1]', '[/size]');
222                 //self::node2BBCode($doc, 'span', array('style'=>'/.*font-size:\s*(.+?)[,;].*/'), '[size=$1]', '[/size]');
223
224                 self::tagToBBCode($doc, 'span', ['style' => '/.*color:\s*(.+?)[,;].*/'], '[color="$1"]', '[/color]');
225
226                 //self::node2BBCode($doc, 'span', array('style'=>'/.*font-family:\s*(.+?)[,;].*/'), '[font=$1]', '[/font]');
227                 //self::node2BBCode($doc, 'div', array('style'=>'/.*font-family:\s*(.+?)[,;].*font-size:\s*(\d+?)pt.*/'), '[font=$1][size=$2]', '[/size][/font]');
228                 //self::node2BBCode($doc, 'div', array('style'=>'/.*font-family:\s*(.+?)[,;].*font-size:\s*(\d+?)px.*/'), '[font=$1][size=$2]', '[/size][/font]');
229                 //self::node2BBCode($doc, 'div', array('style'=>'/.*font-family:\s*(.+?)[,;].*/'), '[font=$1]', '[/font]');
230                 // Importing the classes - interesting for importing of posts from third party networks that were exported from friendica
231                 // Test
232                 //self::node2BBCode($doc, 'span', array('class'=>'/([\w ]+)/'), '[class=$1]', '[/class]');
233                 self::tagToBBCode($doc, 'span', ['class' => 'type-link'], '[class=type-link]', '[/class]');
234                 self::tagToBBCode($doc, 'span', ['class' => 'type-video'], '[class=type-video]', '[/class]');
235
236                 self::tagToBBCode($doc, 'strong', [], '[b]', '[/b]');
237                 self::tagToBBCode($doc, 'em', [], '[i]', '[/i]');
238                 self::tagToBBCode($doc, 'b', [], '[b]', '[/b]');
239                 self::tagToBBCode($doc, 'i', [], '[i]', '[/i]');
240                 self::tagToBBCode($doc, 'u', [], '[u]', '[/u]');
241                 self::tagToBBCode($doc, 's', [], '[s]', '[/s]');
242                 self::tagToBBCode($doc, 'del', [], '[s]', '[/s]');
243                 self::tagToBBCode($doc, 'strike', [], '[s]', '[/s]');
244
245                 self::tagToBBCode($doc, 'big', [], "[size=large]", "[/size]");
246                 self::tagToBBCode($doc, 'small', [], "[size=small]", "[/size]");
247
248                 self::tagToBBCode($doc, 'blockquote', [], '[quote]', '[/quote]');
249
250                 self::tagToBBCode($doc, 'br', [], "\n", '');
251
252                 self::tagToBBCode($doc, 'p', ['class' => 'MsoNormal'], "\n", "");
253                 self::tagToBBCode($doc, 'div', ['class' => 'MsoNormal'], "\r", "");
254
255                 self::tagToBBCode($doc, 'span', [], "", "");
256
257                 self::tagToBBCode($doc, 'span', [], "", "");
258                 self::tagToBBCode($doc, 'pre', [], "", "");
259
260                 self::tagToBBCode($doc, 'div', [], "\r", "\r");
261                 self::tagToBBCode($doc, 'p', [], "\n", "\n");
262
263                 self::tagToBBCode($doc, 'ul', [], "[list]", "[/list]");
264                 self::tagToBBCode($doc, 'ol', [], "[list=1]", "[/list]");
265                 self::tagToBBCode($doc, 'li', [], "[*]", "");
266
267                 self::tagToBBCode($doc, 'hr', [], "[hr]", "");
268
269                 self::tagToBBCode($doc, 'table', [], "", "");
270                 self::tagToBBCode($doc, 'tr', [], "\n", "");
271                 self::tagToBBCode($doc, 'td', [], "\t", "");
272                 //self::node2BBCode($doc, 'table', array(), "[table]", "[/table]");
273                 //self::node2BBCode($doc, 'th', array(), "[th]", "[/th]");
274                 //self::node2BBCode($doc, 'tr', array(), "[tr]", "[/tr]");
275                 //self::node2BBCode($doc, 'td', array(), "[td]", "[/td]");
276                 //self::node2BBCode($doc, 'h1', array(), "\n\n[size=xx-large][b]", "[/b][/size]\n");
277                 //self::node2BBCode($doc, 'h2', array(), "\n\n[size=x-large][b]", "[/b][/size]\n");
278                 //self::node2BBCode($doc, 'h3', array(), "\n\n[size=large][b]", "[/b][/size]\n");
279                 //self::node2BBCode($doc, 'h4', array(), "\n\n[size=medium][b]", "[/b][/size]\n");
280                 //self::node2BBCode($doc, 'h5', array(), "\n\n[size=small][b]", "[/b][/size]\n");
281                 //self::node2BBCode($doc, 'h6', array(), "\n\n[size=x-small][b]", "[/b][/size]\n");
282
283                 self::tagToBBCode($doc, 'h1', [], "[h1]", "[/h1]");
284                 self::tagToBBCode($doc, 'h2', [], "[h2]", "[/h2]");
285                 self::tagToBBCode($doc, 'h3', [], "[h3]", "[/h3]");
286                 self::tagToBBCode($doc, 'h4', [], "[h4]", "[/h4]");
287                 self::tagToBBCode($doc, 'h5', [], "[h5]", "[/h5]");
288                 self::tagToBBCode($doc, 'h6', [], "[h6]", "[/h6]");
289
290                 self::tagToBBCode($doc, 'a', ['href' => '/mailto:(.+)/'], '[mail=$1]', '[/mail]');
291                 self::tagToBBCode($doc, 'a', ['href' => '/(.+)/'], '[url=$1]', '[/url]');
292
293                 self::tagToBBCode($doc, 'img', ['src' => '/(.+)/', 'width' => '/(\d+)/', 'height' => '/(\d+)/'], '[img=$2x$3]$1', '[/img]');
294                 self::tagToBBCode($doc, 'img', ['src' => '/(.+)/'], '[img]$1', '[/img]');
295
296
297                 self::tagToBBCode($doc, 'video', ['src' => '/(.+)/'], '[video]$1', '[/video]');
298                 self::tagToBBCode($doc, 'audio', ['src' => '/(.+)/'], '[audio]$1', '[/audio]');
299                 self::tagToBBCode($doc, 'iframe', ['src' => '/(.+)/'], '[iframe]$1', '[/iframe]');
300
301                 self::tagToBBCode($doc, 'key', [], '[code]', '[/code]');
302                 self::tagToBBCode($doc, 'code', [], '[code]', '[/code]');
303
304                 $message = $doc->saveHTML();
305
306                 // I'm removing something really disturbing
307                 // Don't know exactly what it is
308                 $message = str_replace(chr(194) . chr(160), ' ', $message);
309
310                 $message = str_replace("&nbsp;", " ", $message);
311
312                 // removing multiple DIVs
313                 $message = preg_replace('=\r *\r=i', "\n", $message);
314                 $message = str_replace("\r", "\n", $message);
315
316                 Addon::callHooks('html2bbcode', $message);
317
318                 $message = strip_tags($message);
319
320                 $message = html_entity_decode($message, ENT_QUOTES, 'UTF-8');
321
322                 $message = str_replace(["<"], ["&lt;"], $message);
323
324                 // remove quotes if they don't make sense
325                 $message = preg_replace('=\[/quote\][\s]*\[quote\]=i', "\n", $message);
326
327                 $message = preg_replace('=\[quote\]\s*=i', "[quote]", $message);
328                 $message = preg_replace('=\s*\[/quote\]=i', "[/quote]", $message);
329
330                 do {
331                         $oldmessage = $message;
332                         $message = str_replace("\n \n", "\n\n", $message);
333                 } while ($oldmessage != $message);
334
335                 do {
336                         $oldmessage = $message;
337                         $message = str_replace("\n\n\n", "\n\n", $message);
338                 } while ($oldmessage != $message);
339
340                 do {
341                         $oldmessage = $message;
342                         $message = str_replace(
343                                 [
344                                 "[/size]\n\n",
345                                 "\n[hr]",
346                                 "[hr]\n",
347                                 "\n[list",
348                                 "[/list]\n",
349                                 "\n[/",
350                                 "[list]\n",
351                                 "[list=1]\n",
352                                 "\n[*]"],
353                                 [
354                                 "[/size]\n",
355                                 "[hr]",
356                                 "[hr]",
357                                 "[list",
358                                 "[/list]",
359                                 "[/",
360                                 "[list]",
361                                 "[list=1]",
362                                 "[*]"],
363                                 $message
364                         );
365                 } while ($message != $oldmessage);
366
367                 $message = str_replace(
368                         ['[b][b]', '[/b][/b]', '[i][i]', '[/i][/i]'],
369                         ['[b]', '[/b]', '[i]', '[/i]'],
370                         $message
371                 );
372
373                 // Handling Yahoo style of mails
374                 $message = str_replace('[hr][b]From:[/b]', '[quote][b]From:[/b]', $message);
375
376                 // Restore code blocks
377                 $message = preg_replace_callback(
378                         '#\[codeblock-([0-9]+)\]#iU',
379                         function ($matches) use ($codeblocks) {
380                                 $return = '';
381                                 if (isset($codeblocks[intval($matches[1])])) {
382                                         $return = $codeblocks[$matches[1]];
383                                 }
384                                 return $return;
385                         },
386                         $message
387                 );
388
389                 $message = trim($message);
390
391                 if ($basepath != '') {
392                         $message = self::qualifyURLs($message, $basepath);
393                 }
394
395                 return $message;
396         }
397
398         /**
399          * @brief Sub function to complete incomplete URL
400          *
401          * @param array  $matches  Result of preg_replace_callback
402          * @param string $basepath Basepath that is used to complete the URL
403          *
404          * @return string The expanded URL
405          */
406         private static function qualifyURLsSub($matches, $basepath)
407         {
408                 $base = parse_url($basepath);
409                 unset($base['query']);
410                 unset($base['fragment']);
411
412                 $link = $matches[0];
413                 $url = $matches[1];
414
415                 $parts = array_merge($base, parse_url($url));
416                 $url2 = Network::unparseURL($parts);
417
418                 return str_replace($url, $url2, $link);
419         }
420
421         /**
422          * @brief Complete incomplete URLs in BBCode
423          *
424          * @param string $body     Body with URLs
425          * @param string $basepath Base path that is used to complete the URL
426          *
427          * @return string Body with expanded URLs
428          */
429         private static function qualifyURLs($body, $basepath)
430         {
431                 $URLSearchString = "^\[\]";
432
433                 $matches = ["/\[url\=([$URLSearchString]*)\].*?\[\/url\]/ism",
434                         "/\[url\]([$URLSearchString]*)\[\/url\]/ism",
435                         "/\[img\=[0-9]*x[0-9]*\](.*?)\[\/img\]/ism",
436                         "/\[img\](.*?)\[\/img\]/ism",
437                         "/\[zmg\=[0-9]*x[0-9]*\](.*?)\[\/img\]/ism",
438                         "/\[zmg\](.*?)\[\/zmg\]/ism",
439                         "/\[video\](.*?)\[\/video\]/ism",
440                         "/\[audio\](.*?)\[\/audio\]/ism",
441                 ];
442
443                 foreach ($matches as $match) {
444                         $body = preg_replace_callback(
445                                 $match,
446                                 function ($match) use ($basepath) {
447                                         return self::qualifyURLsSub($match, $basepath);
448                                 },
449                                 $body
450                         );
451                 }
452                 return $body;
453         }
454
455         private static function breakLines($line, $level, $wraplength = 75)
456         {
457                 if ($wraplength == 0) {
458                         $wraplength = 2000000;
459                 }
460
461                 $wraplen = $wraplength - $level;
462
463                 $newlines = [];
464
465                 do {
466                         $oldline = $line;
467
468                         $subline = substr($line, 0, $wraplen);
469
470                         $pos = strrpos($subline, ' ');
471
472                         if ($pos == 0) {
473                                 $pos = strpos($line, ' ');
474                         }
475
476                         if (($pos > 0) && strlen($line) > $wraplen) {
477                                 $newline = trim(substr($line, 0, $pos));
478                                 if ($level > 0) {
479                                         $newline = str_repeat(">", $level) . ' ' . $newline;
480                                 }
481
482                                 $newlines[] = $newline . " ";
483                                 $line = substr($line, $pos + 1);
484                         }
485                 } while ((strlen($line) > $wraplen) && !($oldline == $line));
486
487                 if ($level > 0) {
488                         $line = str_repeat(">", $level) . ' ' . $line;
489                 }
490
491                 $newlines[] = $line;
492
493                 return implode($newlines, "\n");
494         }
495
496         private static function quoteLevel($message, $wraplength = 75)
497         {
498                 $lines = explode("\n", $message);
499
500                 $newlines = [];
501                 $level = 0;
502                 foreach ($lines as $line) {
503                         $line = trim($line);
504                         $startquote = false;
505                         while (strpos("*" . $line, '[quote]') > 0) {
506                                 $level++;
507                                 $pos = strpos($line, '[quote]');
508                                 $line = substr($line, 0, $pos) . substr($line, $pos + 7);
509                                 $startquote = true;
510                         }
511
512                         $currlevel = $level;
513
514                         while (strpos("*" . $line, '[/quote]') > 0) {
515                                 $level--;
516                                 if ($level < 0) {
517                                         $level = 0;
518                                 }
519
520                                 $pos = strpos($line, '[/quote]');
521                                 $line = substr($line, 0, $pos) . substr($line, $pos + 8);
522                         }
523
524                         if (!$startquote || ($line != '')) {
525                                 $newlines[] = self::breakLines($line, $currlevel, $wraplength);
526                         }
527                 }
528
529                 return implode($newlines, "\n");
530         }
531
532         private static function collectURLs($message)
533         {
534                 $pattern = '/<a.*?href="(.*?)".*?>(.*?)<\/a>/is';
535                 preg_match_all($pattern, $message, $result, PREG_SET_ORDER);
536
537                 $urls = [];
538                 foreach ($result as $treffer) {
539                         $ignore = false;
540
541                         // A list of some links that should be ignored
542                         $list = ["/user/", "/tag/", "/group/", "/profile/", "/search?search=", "/search?tag=", "mailto:", "/u/", "/node/",
543                                 "//plus.google.com/", "//twitter.com/"];
544                         foreach ($list as $listitem) {
545                                 if (strpos($treffer[1], $listitem) !== false) {
546                                         $ignore = true;
547                                 }
548                         }
549
550                         if ((strpos($treffer[1], "//twitter.com/") !== false) && (strpos($treffer[1], "/status/") !== false)) {
551                                 $ignore = false;
552                         }
553
554                         if ((strpos($treffer[1], "//plus.google.com/") !== false) && (strpos($treffer[1], "/posts") !== false)) {
555                                 $ignore = false;
556                         }
557
558                         if ((strpos($treffer[1], "//plus.google.com/") !== false) && (strpos($treffer[1], "/photos") !== false)) {
559                                 $ignore = false;
560                         }
561
562                         if (!$ignore) {
563                                 $urls[$treffer[1]] = $treffer[1];
564                         }
565                 }
566
567                 return $urls;
568         }
569
570         public static function toPlaintext($html, $wraplength = 75, $compact = false)
571         {
572                 $message = str_replace("\r", "", $html);
573
574                 $doc = new DOMDocument();
575                 $doc->preserveWhiteSpace = false;
576
577                 $message = mb_convert_encoding($message, 'HTML-ENTITIES', "UTF-8");
578
579                 @$doc->loadHTML($message);
580
581                 $xpath = new DOMXPath($doc);
582                 $list = $xpath->query("//pre");
583                 foreach ($list as $node) {
584                         $node->nodeValue = str_replace("\n", "\r", $node->nodeValue);
585                 }
586
587                 $message = $doc->saveHTML();
588                 $message = str_replace(["\n<", ">\n", "\r", "\n", "\xC3\x82\xC2\xA0"], ["<", ">", "<br>", " ", ""], $message);
589                 $message = preg_replace('= [\s]*=i', " ", $message);
590
591                 // Collecting all links
592                 $urls = self::collectURLs($message);
593
594                 @$doc->loadHTML($message);
595
596                 self::tagToBBCode($doc, 'html', [], '', '');
597                 self::tagToBBCode($doc, 'body', [], '', '');
598
599                 // MyBB-Auszeichnungen
600                 /*
601                   self::node2BBCode($doc, 'span', array('style'=>'text-decoration: underline;'), '_', '_');
602                   self::node2BBCode($doc, 'span', array('style'=>'font-style: italic;'), '/', '/');
603                   self::node2BBCode($doc, 'span', array('style'=>'font-weight: bold;'), '*', '*');
604
605                   self::node2BBCode($doc, 'strong', array(), '*', '*');
606                   self::node2BBCode($doc, 'b', array(), '*', '*');
607                   self::node2BBCode($doc, 'i', array(), '/', '/');
608                   self::node2BBCode($doc, 'u', array(), '_', '_');
609                  */
610
611                 if ($compact) {
612                         self::tagToBBCode($doc, 'blockquote', [], "»", "«");
613                 } else {
614                         self::tagToBBCode($doc, 'blockquote', [], '[quote]', "[/quote]\n");
615                 }
616
617                 self::tagToBBCode($doc, 'br', [], "\n", '');
618
619                 self::tagToBBCode($doc, 'span', [], "", "");
620                 self::tagToBBCode($doc, 'pre', [], "", "");
621                 self::tagToBBCode($doc, 'div', [], "\r", "\r");
622                 self::tagToBBCode($doc, 'p', [], "\n", "\n");
623
624                 //self::node2BBCode($doc, 'ul', array(), "\n[list]", "[/list]\n");
625                 //self::node2BBCode($doc, 'ol', array(), "\n[list=1]", "[/list]\n");
626                 self::tagToBBCode($doc, 'li', [], "\n* ", "\n");
627
628                 self::tagToBBCode($doc, 'hr', [], "\n" . str_repeat("-", 70) . "\n", "");
629
630                 self::tagToBBCode($doc, 'tr', [], "\n", "");
631                 self::tagToBBCode($doc, 'td', [], "\t", "");
632
633                 self::tagToBBCode($doc, 'h1', [], "\n\n*", "*\n");
634                 self::tagToBBCode($doc, 'h2', [], "\n\n*", "*\n");
635                 self::tagToBBCode($doc, 'h3', [], "\n\n*", "*\n");
636                 self::tagToBBCode($doc, 'h4', [], "\n\n*", "*\n");
637                 self::tagToBBCode($doc, 'h5', [], "\n\n*", "*\n");
638                 self::tagToBBCode($doc, 'h6', [], "\n\n*", "*\n");
639
640                 // Problem: there is no reliable way to detect if it is a link to a tag or profile
641                 //self::node2BBCode($doc, 'a', array('href'=>'/(.+)/'), ' $1 ', ' ', true);
642                 //self::node2BBCode($doc, 'a', array('href'=>'/(.+)/', 'rel'=>'oembed'), ' $1 ', '', true);
643                 //self::node2BBCode($doc, 'img', array('alt'=>'/(.+)/'), '$1', '');
644                 //self::node2BBCode($doc, 'img', array('title'=>'/(.+)/'), '$1', '');
645                 //self::node2BBCode($doc, 'img', array(), '', '');
646                 if (!$compact) {
647                         self::tagToBBCode($doc, 'img', ['src' => '/(.+)/'], ' [img]$1', '[/img] ');
648                 } else {
649                         self::tagToBBCode($doc, 'img', ['src' => '/(.+)/'], ' ', ' ');
650                 }
651
652                 self::tagToBBCode($doc, 'iframe', ['src' => '/(.+)/'], ' $1 ', '');
653
654                 $message = $doc->saveHTML();
655
656                 if (!$compact) {
657                         $message = str_replace("[img]", "", $message);
658                         $message = str_replace("[/img]", "", $message);
659                 }
660
661                 // was ersetze ich da?
662                 // Irgendein stoerrisches UTF-Zeug
663                 $message = str_replace(chr(194) . chr(160), ' ', $message);
664
665                 $message = str_replace("&nbsp;", " ", $message);
666
667                 // Aufeinanderfolgende DIVs
668                 $message = preg_replace('=\r *\r=i', "\n", $message);
669                 $message = str_replace("\r", "\n", $message);
670
671                 $message = strip_tags($message);
672
673                 $message = html_entity_decode($message, ENT_QUOTES, 'UTF-8');
674
675                 if (!$compact && ($message != '')) {
676                         foreach ($urls as $id => $url) {
677                                 if ($url != '' && strpos($message, $url) === false) {
678                                         $message .= "\n" . $url . ' ';
679                                 }
680                         }
681                 }
682
683                 $message = str_replace("\n«", "«\n", $message);
684                 $message = str_replace("»\n", "\n»", $message);
685
686                 do {
687                         $oldmessage = $message;
688                         $message = str_replace("\n\n\n", "\n\n", $message);
689                 } while ($oldmessage != $message);
690
691                 $message = self::quoteLevel(trim($message), $wraplength);
692
693                 return trim($message);
694         }
695
696         /**
697          * Converts provided HTML code to Markdown. The hardwrap parameter maximizes
698          * compatibility with Diaspora in spite of the Markdown standards.
699          *
700          * @param string $html
701          * @return string
702          */
703         public static function toMarkdown($html)
704         {
705                 $converter = new HtmlConverter(['hard_break' => true]);
706                 $markdown = $converter->convert($html);
707
708                 return $markdown;
709         }
710
711         /**
712          * @brief Convert video HTML to BBCode tags
713          *
714          * @param string $s
715          */
716         public static function toBBCodeVideo($s)
717         {
718                 $s = preg_replace(
719                         '#<object[^>]+>(.*?)https?://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+)(.*?)</object>#ism',
720                         '[youtube]$2[/youtube]',
721                         $s
722                 );
723         
724                 $s = preg_replace(
725                         '#<iframe[^>](.*?)https?://www.youtube.com/embed/([A-Za-z0-9\-_=]+)(.*?)</iframe>#ism',
726                         '[youtube]$2[/youtube]',
727                         $s
728                 );
729         
730                 $s = preg_replace(
731                         '#<iframe[^>](.*?)https?://player.vimeo.com/video/([0-9]+)(.*?)</iframe>#ism',
732                         '[vimeo]$2[/vimeo]',
733                         $s
734                 );
735         
736                 return $s;
737         }
738         
739         /**
740          * transform link href and img src from relative to absolute
741          *
742          * @param string $text
743          * @param string $base base url
744          * @return string
745          */
746         public static function relToAbs($text, $base)
747         {
748                 if (empty($base)) {
749                         return $text;
750                 }
751         
752                 $base = rtrim($base, '/');
753         
754                 $base2 = $base . "/";
755         
756                 // Replace links
757                 $pattern = "/<a([^>]*) href=\"(?!http|https|\/)([^\"]*)\"/";
758                 $replace = "<a\${1} href=\"" . $base2 . "\${2}\"";
759                 $text = preg_replace($pattern, $replace, $text);
760         
761                 $pattern = "/<a([^>]*) href=\"(?!http|https)([^\"]*)\"/";
762                 $replace = "<a\${1} href=\"" . $base . "\${2}\"";
763                 $text = preg_replace($pattern, $replace, $text);
764         
765                 // Replace images
766                 $pattern = "/<img([^>]*) src=\"(?!http|https|\/)([^\"]*)\"/";
767                 $replace = "<img\${1} src=\"" . $base2 . "\${2}\"";
768                 $text = preg_replace($pattern, $replace, $text);
769         
770                 $pattern = "/<img([^>]*) src=\"(?!http|https)([^\"]*)\"/";
771                 $replace = "<img\${1} src=\"" . $base . "\${2}\"";
772                 $text = preg_replace($pattern, $replace, $text);
773         
774         
775                 // Done
776                 return $text;
777         }
778
779         /**
780          * return div element with class 'clear'
781          * @return string
782          * @deprecated
783          */
784         public static function clearDiv()
785         {
786                 return '<div class="clear"></div>';
787         }
788
789         /**
790          * Loader for infinite scrolling
791          * @return string html for loader
792          */
793         public static function scrollLoader()
794         {
795                 $tpl = Renderer::getMarkupTemplate("scroll_loader.tpl");
796                 return Renderer::replaceMacros($tpl, [
797                         'wait' => L10n::t('Loading more entries...'),
798                         'end' => L10n::t('The end')
799                 ]);
800         }
801
802         /**
803          * Get html for contact block.
804          *
805          * @template contact_block.tpl
806          * @hook contact_block_end (contacts=>array, output=>string)
807          * @return string
808          */
809         public static function contactBlock()
810         {
811                 $o = '';
812                 $a = get_app();
813
814                 $shown = PConfig::get($a->profile['uid'], 'system', 'display_friend_count', 24);
815                 if ($shown == 0) {
816                         return;
817                 }
818
819                 if (!is_array($a->profile) || $a->profile['hide-friends']) {
820                         return $o;
821                 }
822
823                 $r = q("SELECT COUNT(*) AS `total` FROM `contact`
824                                 WHERE `uid` = %d AND NOT `self` AND NOT `blocked`
825                                         AND NOT `pending` AND NOT `hidden` AND NOT `archive`
826                                         AND `network` IN ('%s', '%s', '%s')",
827                         intval($a->profile['uid']),
828                         DBA::escape(Protocol::DFRN),
829                         DBA::escape(Protocol::OSTATUS),
830                         DBA::escape(Protocol::DIASPORA)
831                 );
832
833                 if (DBA::isResult($r)) {
834                         $total = intval($r[0]['total']);
835                 }
836
837                 if (!$total) {
838                         $contacts = L10n::t('No contacts');
839                         $micropro = null;
840                 } else {
841                         // Splitting the query in two parts makes it much faster
842                         $r = q("SELECT `id` FROM `contact`
843                                         WHERE `uid` = %d AND NOT `self` AND NOT `blocked`
844                                                 AND NOT `pending` AND NOT `hidden` AND NOT `archive`
845                                                 AND `network` IN ('%s', '%s', '%s')
846                                         ORDER BY RAND() LIMIT %d",
847                                 intval($a->profile['uid']),
848                                 DBA::escape(Protocol::DFRN),
849                                 DBA::escape(Protocol::OSTATUS),
850                                 DBA::escape(Protocol::DIASPORA),
851                                 intval($shown)
852                         );
853
854                         if (DBA::isResult($r)) {
855                                 $contacts = [];
856                                 foreach ($r as $contact) {
857                                         $contacts[] = $contact["id"];
858                                 }
859
860                                 $r = q("SELECT `id`, `uid`, `addr`, `url`, `name`, `thumb`, `network` FROM `contact` WHERE `id` IN (%s)",
861                                         DBA::escape(implode(",", $contacts))
862                                 );
863
864                                 if (DBA::isResult($r)) {
865                                         $contacts = L10n::tt('%d Contact', '%d Contacts', $total);
866                                         $micropro = [];
867                                         foreach ($r as $rr) {
868                                                 $micropro[] = self::micropro($rr, true, 'mpfriend');
869                                         }
870                                 }
871                         }
872                 }
873
874                 $tpl = Renderer::getMarkupTemplate('contact_block.tpl');
875                 $o = Renderer::replaceMacros($tpl, [
876                         '$contacts' => $contacts,
877                         '$nickname' => $a->profile['nickname'],
878                         '$viewcontacts' => L10n::t('View Contacts'),
879                         '$micropro' => $micropro,
880                 ]);
881
882                 $arr = ['contacts' => $r, 'output' => $o];
883
884                 Addon::callHooks('contact_block_end', $arr);
885
886                 return $o;
887         }
888
889         /**
890          * @brief Format contacts as picture links or as texxt links
891          *
892          * @param array $contact Array with contacts which contains an array with
893          *      int 'id' => The ID of the contact
894         *       int 'uid' => The user ID of the user who owns this data
895         *       string 'name' => The name of the contact
896         *       string 'url' => The url to the profile page of the contact
897         *       string 'addr' => The webbie of the contact (e.g.) username@friendica.com
898         *       string 'network' => The network to which the contact belongs to
899         *       string 'thumb' => The contact picture
900         *       string 'click' => js code which is performed when clicking on the contact
901         * @param boolean $redirect If true try to use the redir url if it's possible
902         * @param string $class CSS class for the
903         * @param boolean $textmode If true display the contacts as text links
904         *       if false display the contacts as picture links
905
906         * @return string Formatted html
907         */
908         public static function micropro($contact, $redirect = false, $class = '', $textmode = false)
909         {
910                 // Use the contact URL if no address is available
911                 if (empty($contact['addr'])) {
912                         $contact["addr"] = $contact["url"];
913                 }
914
915                 $url = $contact['url'];
916                 $sparkle = '';
917                 $redir = false;
918
919                 if ($redirect) {
920                         $url = Contact::magicLink($contact['url']);
921                         if (strpos($url, 'redir/') === 0) {
922                                 $sparkle = ' sparkle';
923                         }
924                 }
925
926                 // If there is some js available we don't need the url
927                 if (!empty($contact['click'])) {
928                         $url = '';
929                 }
930
931                 return Renderer::replaceMacros(Renderer::getMarkupTemplate(($textmode)?'micropro_txt.tpl':'micropro_img.tpl'), [
932                         '$click' => defaults($contact, 'click', ''),
933                         '$class' => $class,
934                         '$url' => $url,
935                         '$photo' => ProxyUtils::proxifyUrl($contact['thumb'], false, ProxyUtils::SIZE_THUMB),
936                         '$name' => $contact['name'],
937                         'title' => $contact['name'] . ' [' . $contact['addr'] . ']',
938                         '$parkle' => $sparkle,
939                         '$redir' => $redir
940                 ]);
941         }
942
943         /**
944          * Search box.
945          *
946          * @param string $s     Search query.
947          * @param string $id    HTML id
948          * @param string $url   Search url.
949          * @param bool   $save  Show save search button.
950          * @param bool   $aside Display the search widgit aside.
951          *
952          * @return string Formatted HTML.
953          */
954         public static function search($s, $id = 'search-box', $url = 'search', $aside = true)
955         {
956                 $mode = 'text';
957
958                 if (strpos($s, '#') === 0) {
959                         $mode = 'tag';
960                 }
961                 $save_label = $mode === 'text' ? L10n::t('Save') : L10n::t('Follow');
962
963                 $values = [
964                                 '$s' => htmlspecialchars($s),
965                                 '$id' => $id,
966                                 '$action_url' => $url,
967                                 '$search_label' => L10n::t('Search'),
968                                 '$save_label' => $save_label,
969                                 '$savedsearch' => 'savedsearch',
970                                 '$search_hint' => L10n::t('@name, !forum, #tags, content'),
971                                 '$mode' => $mode
972                         ];
973
974                 if (!$aside) {
975                         $values['$searchoption'] = [
976                                                 L10n::t("Full Text"),
977                                                 L10n::t("Tags"),
978                                                 L10n::t("Contacts")];
979
980                         if (Config::get('system', 'poco_local_search')) {
981                                 $values['$searchoption'][] = L10n::t("Forums");
982                         }
983                 }
984
985                 return Renderer::replaceMacros(Renderer::getMarkupTemplate('searchbox.tpl'), $values);
986         }
987
988         /**
989          * Replace naked text hyperlink with HTML formatted hyperlink
990          *
991          * @param string $s
992          */
993         public static function toLink($s)
994         {
995                 $s = preg_replace("/(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\'\%\$\!\+]*)/", ' <a href="$1" target="_blank">$1</a>', $s);
996                 $s = preg_replace("/\<(.*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism", '<$1$2=$3&$4>', $s);
997                 return $s;
998         }
999
1000         /**
1001          * Given a HTML text and a set of filtering reasons, adds a content hiding header with the provided reasons
1002          *
1003          * Reasons are expected to have been translated already.
1004          *
1005          * @param string $html
1006          * @param array  $reasons
1007          * @return string
1008          */
1009         public static function applyContentFilter($html, array $reasons)
1010         {
1011                 if (count($reasons)) {
1012                         $tpl = Renderer::getMarkupTemplate('wall/content_filter.tpl');
1013                         $html = Renderer::replaceMacros($tpl, [
1014                                 '$reasons'   => $reasons,
1015                                 '$rnd'       => Strings::getRandomHex(8),
1016                                 '$openclose' => L10n::t('Click to open/close'),
1017                                 '$html'      => $html
1018                         ]);
1019                 }
1020
1021                 return $html;
1022         }
1023
1024         /**
1025          * replace html amp entity with amp char
1026          * @param string $s
1027          * @return string
1028          */
1029         public static function unamp($s)
1030         {
1031                 return str_replace('&amp;', '&', $s);
1032         }
1033 }