src/Content/Text/BBCode.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Content\Text;
  23
  24 use DOMDocument;
  25 use DOMXPath;
  26 use Exception;
  27 use Friendica\Content\ContactSelector;
  28 use Friendica\Content\Item;
  29 use Friendica\Content\OEmbed;
  30 use Friendica\Content\PageInfo;
  31 use Friendica\Content\Smilies;
  32 use Friendica\Core\Hook;
  33 use Friendica\Core\Logger;
  34 use Friendica\Core\Protocol;
  35 use Friendica\Core\Renderer;
  36 use Friendica\DI;
  37 use Friendica\Model\Contact;
  38 use Friendica\Model\Event;
  39 use Friendica\Model\Photo;
  40 use Friendica\Model\Post;
  41 use Friendica\Model\Tag;
  42 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
  43 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
  44 use Friendica\Object\Image;
  45 use Friendica\Protocol\Activity;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Map;
  48 use Friendica\Util\ParseUrl;
  49 use Friendica\Util\Proxy;
  50 use Friendica\Util\Strings;
  51 use Friendica\Util\XML;
  52
  53 class BBCode
  54 {
  55         // Update this value to the current date whenever changes are made to BBCode::convert
  56         const VERSION = '2021-07-28';
  57
  58         const INTERNAL     = 0;
  59         const EXTERNAL     = 1;
  60         const MASTODON_API = 2;
  61         const DIASPORA     = 3;
  62         const CONNECTORS   = 4;
  63         const TWITTER_API  = 5;
  64         const OSTATUS      = 7;
  65         const TWITTER      = 8;
  66         const BACKLINK     = 8;
  67         const ACTIVITYPUB  = 9;
  68
  69         const TOP_ANCHOR = '<br class="top-anchor">';
  70         const BOTTOM_ANCHOR = '<br class="button-anchor">';
  71
  72         const PREVIEW_NONE     = 0;
  73         const PREVIEW_NO_IMAGE = 1;
  74         const PREVIEW_LARGE    = 2;
  75         const PREVIEW_SMALL    = 3;
  76
  77         /**
  78          * Fetches attachment data that were generated the old way
  79          *
  80          * @param string $body Message body
  81          * @return array
  82          *                     'type' -> Message type ('link', 'video', 'photo')
  83          *                     'text' -> Text before the shared message
  84          *                     'after' -> Text after the shared message
  85          *                     'image' -> Preview image of the message
  86          *                     'url' -> Url to the attached message
  87          *                     'title' -> Title of the attachment
  88          *                     'description' -> Description of the attachment
  89          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  90          */
  91         private static function getOldAttachmentData(string $body): array
  92         {
  93                 $post = [];
  94
  95                 // Simplify image codes
  96                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
  97
  98                 if (preg_match_all("(\[class=(.*?)\](.*?)\[\/class\])ism", $body, $attached, PREG_SET_ORDER)) {
  99                         foreach ($attached as $data) {
 100                                 if (!in_array($data[1], ['type-link', 'type-video', 'type-photo'])) {
 101                                         continue;
 102                                 }
 103
 104                                 $post['type'] = substr($data[1], 5);
 105
 106                                 $pos = strpos($body, $data[0]);
 107                                 if ($pos > 0) {
 108                                         $post['text'] = trim(substr($body, 0, $pos));
 109                                         $post['after'] = trim(substr($body, $pos + strlen($data[0])));
 110                                 } else {
 111                                         $post['text'] = trim(str_replace($data[0], '', $body));
 112                                         $post['after'] = '';
 113                                 }
 114
 115                                 $attacheddata = $data[2];
 116
 117                                 if (preg_match("/\[img\](.*?)\[\/img\]/ism", $attacheddata, $matches)) {
 118
 119                                         $picturedata = Images::getInfoFromURLCached($matches[1]);
 120
 121                                         if ($picturedata) {
 122                                                 if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) {
 123                                                         $post['image'] = $matches[1];
 124                                                 } else {
 125                                                         $post['preview'] = $matches[1];
 126                                                 }
 127                                         }
 128                                 }
 129
 130                                 if (preg_match("/\[bookmark\=(.*?)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) {
 131                                         $post['url'] = $matches[1];
 132                                         $post['title'] = $matches[2];
 133                                 }
 134                                 if (!empty($post['url']) && (in_array($post['type'], ['link', 'video']))
 135                                         && preg_match("/\[url\=(.*?)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
 136                                         $post['url'] = $matches[1];
 137                                 }
 138
 139                                 // Search for description
 140                                 if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) {
 141                                         $post['description'] = $matches[1];
 142                                 }
 143                         }
 144                 }
 145                 return $post;
 146         }
 147
 148         /**
 149          * Fetches attachment data that were generated with the "attachment" element
 150          *
 151          * @param string $body Message body
 152          * @return array
 153          *                     'type' -> Message type ('link', 'video', 'photo')
 154          *                     'text' -> Text before the shared message
 155          *                     'after' -> Text after the shared message
 156          *                     'image' -> Preview image of the message
 157          *                     'url' -> Url to the attached message
 158          *                     'title' -> Title of the attachment
 159          *                     'description' -> Description of the attachment
 160          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 161          */
 162         public static function getAttachmentData(string $body): array
 163         {
 164                 DI::profiler()->startRecording('rendering');
 165                 $data = [
 166                         'type'          => '',
 167                         'text'          => '',
 168                         'after'         => '',
 169                         'image'         => null,
 170                         'url'           => '',
 171                         'author_name'   => '',
 172                         'author_url'    => '',
 173                         'provider_name' => '',
 174                         'provider_url'  => '',
 175                         'title'         => '',
 176                         'description'   => '',
 177                 ];
 178
 179                 if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
 180                         DI::profiler()->stopRecording();
 181                         return self::getOldAttachmentData($body);
 182                 }
 183
 184                 $attributes = $match[2];
 185
 186                 $data['text'] = trim($match[1]);
 187
 188                 foreach (['type', 'url', 'title', 'image', 'preview', 'publisher_name', 'publisher_url', 'author_name', 'author_url'] as $field) {
 189                         preg_match('/' . preg_quote($field, '/') . '=("|\')(.*?)\1/ism', $attributes, $matches);
 190                         $value = $matches[2] ?? '';
 191
 192                         if ($value != '') {
 193                                 switch ($field) {
 194                                         case 'publisher_name':
 195                                                 $data['provider_name'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
 196                                                 break;
 197
 198                                         case 'publisher_url':
 199                                                 $data['provider_url'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
 200                                                 break;
 201
 202                                         case 'author_name':
 203                                                 $data['author_name'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
 204                                                 if ($data['provider_name'] == $data['author_name']) {
 205                                                         $data['author_name'] = '';
 206                                                 }
 207                                                 break;
 208
 209                                         case 'author_url':
 210                                                 $data['author_url'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
 211                                                 if ($data['provider_url'] == $data['author_url']) {
 212                                                         $data['author_url'] = '';
 213                                                 }
 214                                                 break;
 215
 216                                         case 'title':
 217                                                 $value = self::convert(html_entity_decode($value, ENT_QUOTES, 'UTF-8'), false, true);
 218                                                 $value = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
 219                                                 $value = str_replace(['[', ']'], ['&#91;', '&#93;'], $value);
 220                                                 $data['title'] = $value;
 221
 222                                         default:
 223                                                 $data[$field] = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
 224                                                 break;
 225                                 }
 226                         }
 227                 }
 228
 229                 if (!in_array($data['type'], ['link', 'audio', 'photo', 'video'])) {
 230                         DI::profiler()->stopRecording();
 231                         return [];
 232                 }
 233
 234                 $data['description'] = trim($match[3]);
 235
 236                 $data['after'] = trim($match[4]);
 237
 238                 $parts = parse_url($data['url']);
 239                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
 240                         if (empty($data['provider_name'])) {
 241                                 $data['provider_name'] = $parts['host'];
 242                         }
 243                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
 244                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
 245
 246                                 if (!empty($parts['port'])) {
 247                                         $data['provider_url'] .= ':' . $parts['port'];
 248                                 }
 249                         }
 250                 }
 251
 252                 DI::profiler()->stopRecording();
 253                 return $data;
 254         }
 255
 256         public static function getAttachedData(string $body, array $item = []): array
 257         {
 258                 /*
 259                 - text:
 260                 - type: link, video, photo
 261                 - title:
 262                 - url:
 263                 - image:
 264                 - description:
 265                 - (thumbnail)
 266                 */
 267
 268                 DI::profiler()->startRecording('rendering');
 269                 $has_title = !empty($item['title']);
 270                 $plink = $item['plink'] ?? '';
 271                 $post = self::getAttachmentData($body);
 272
 273                 // Get all linked images with alternative image description
 274                 if (preg_match_all("/\[img=(http[^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
 275                         foreach ($pictures as $picture) {
 276                                 if ($id = Photo::getIdForName($picture[1])) {
 277                                         $post['images'][] = ['url' => str_replace('-1.', '-0.', $picture[1]), 'description' => $picture[2], 'id' => $id];
 278                                 } else {
 279                                         $post['remote_images'][] = ['url' => $picture[1], 'description' => $picture[2]];
 280                                 }
 281                         }
 282                         if (!empty($post['images']) && !empty($post['images'][0]['description'])) {
 283                                 $post['image_description'] = $post['images'][0]['description'];
 284                         }
 285                 }
 286
 287                 if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
 288                         foreach ($pictures as $picture) {
 289                                 if ($id = Photo::getIdForName($picture[1])) {
 290                                         $post['images'][] = ['url' => str_replace('-1.', '-0.', $picture[1]), 'description' => '', 'id' => $id];
 291                                 } else {
 292                                         $post['remote_images'][] = ['url' => $picture[1], 'description' => ''];
 293                                 }
 294                         }
 295                 }
 296
 297                 if (!isset($post['type'])) {
 298                         $post['text'] = $body;
 299                 }
 300
 301                 // Simplify image codes
 302                 $post['text'] = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $post['text']);
 303                 $post['text'] = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $post['text']);
 304
 305                 // if nothing is found, it maybe having an image.
 306                 if (!isset($post['type'])) {
 307                         if (preg_match_all("#\[url=([^\]]+?)\]\s*\[img\]([^\[]+?)\[/img\]\s*\[/url\]#ism", $post['text'], $pictures, PREG_SET_ORDER)) {
 308                                 if ((count($pictures) == 1) && !$has_title && !Photo::isLocal($pictures[0][2])) {
 309                                         if (!empty($item['object-type']) && ($item['object-type'] == Activity\ObjectType::IMAGE)) {
 310                                                 // Replace the preview picture with the real picture
 311                                                 $url = str_replace('-1.', '-0.', $pictures[0][2]);
 312                                                 $data = ['url' => $url, 'type' => 'photo'];
 313                                         } else {
 314                                                 // Checking, if the link goes to a picture
 315                                                 $data = ParseUrl::getSiteinfoCached($pictures[0][1]);
 316                                         }
 317
 318                                         // Workaround:
 319                                         // Sometimes photo posts to the own album are not detected at the start.
 320                                         // So we seem to cannot use the cache for these cases. That's strange.
 321                                         if (($data['type'] != 'photo') && strstr($pictures[0][1], '/photos/')) {
 322                                                 $data = ParseUrl::getSiteinfo($pictures[0][1]);
 323                                         }
 324
 325                                         if ($data['type'] == 'photo') {
 326                                                 $post['type'] = 'photo';
 327                                                 if (isset($data['images'][0])) {
 328                                                         $post['image'] = $data['images'][0]['src'];
 329                                                         $post['url'] = $data['url'];
 330                                                 } else {
 331                                                         $post['image'] = $data['url'];
 332                                                 }
 333
 334                                                 $post['preview'] = $pictures[0][2];
 335                                                 $post['text'] = trim(str_replace($pictures[0][0], '', $post['text']));
 336                                         } else {
 337                                                 $imgdata = Images::getInfoFromURLCached($pictures[0][1]);
 338                                                 if (($imgdata) && substr($imgdata['mime'], 0, 6) == 'image/') {
 339                                                         $post['type'] = 'photo';
 340                                                         $post['image'] = $pictures[0][1];
 341                                                         $post['preview'] = $pictures[0][2];
 342                                                         $post['text'] = trim(str_replace($pictures[0][0], '', $post['text']));
 343                                                 }
 344                                         }
 345                                 } elseif (count($pictures) > 0) {
 346                                         if (count($pictures) > 4) {
 347                                                 $post['type'] = 'link';
 348                                                 $post['url'] = $plink;
 349                                         } else {
 350                                                 $post['type'] = 'photo';
 351                                         }
 352
 353                                         $post['image'] = $pictures[0][2];
 354
 355                                         foreach ($pictures as $picture) {
 356                                                 $post['text'] = trim(str_replace($picture[0], '', $post['text']));
 357                                         }
 358                                 }
 359                         } elseif (preg_match_all("(\[img\](.*?)\[\/img\])ism", $post['text'], $pictures, PREG_SET_ORDER)) {
 360                                 if ($has_title) {
 361                                         $post['type'] = 'link';
 362                                         $post['url'] = $plink;
 363                                 } else {
 364                                         $post['type'] = 'photo';
 365                                 }
 366
 367                                 $post['image'] = $pictures[0][1];
 368                                 foreach ($pictures as $picture) {
 369                                         $post['text'] = trim(str_replace($picture[0], '', $post['text']));
 370                                 }
 371                         }
 372
 373                         // Test for the external links
 374                         preg_match_all("(\[url\](.*?)\[\/url\])ism", $post['text'], $links1, PREG_SET_ORDER);
 375                         preg_match_all("(\[url\=(.*?)\].*?\[\/url\])ism", $post['text'], $links2, PREG_SET_ORDER);
 376
 377                         $links = array_merge($links1, $links2);
 378
 379                         // If there is only a single one, then use it.
 380                         // This should cover link posts via API.
 381                         if ((count($links) == 1) && !isset($post['preview']) && !$has_title) {
 382                                 $post['type'] = 'link';
 383                                 $post['url'] = $links[0][1];
 384                         }
 385
 386                         // Simplify "video" element
 387                         $post['text'] = preg_replace('(\[video.*?\ssrc\s?=\s?([^\s\]]+).*?\].*?\[/video\])ism', '[video]$1[/video]', $post['text']);
 388
 389                         // Now count the number of external media links
 390                         preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $post['text'], $links1, PREG_SET_ORDER);
 391                         preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $post['text'], $links2, PREG_SET_ORDER);
 392                         preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $post['text'], $links3, PREG_SET_ORDER);
 393                         preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $post['text'], $links4, PREG_SET_ORDER);
 394
 395                         // Add them to the other external links
 396                         $links = array_merge($links, $links1, $links2, $links3, $links4);
 397
 398                         // Are there more than one?
 399                         if (count($links) > 1) {
 400                                 // The post will be the type "text", which means a blog post
 401                                 unset($post['type']);
 402                                 $post['url'] = $plink;
 403                         }
 404
 405                         if (!isset($post['type'])) {
 406                                 $post['type'] = 'text';
 407                         }
 408
 409                         if (($post['type'] == 'photo') && empty($post['images']) && !empty($post['remote_images'])) {
 410                                 $post['images'] = $post['remote_images'];
 411                                 $post['image'] = $post['images'][0]['url'];
 412                                 if (!empty($post['images']) && !empty($post['images'][0]['description'])) {
 413                                         $post['image_description'] = $post['images'][0]['description'];
 414                                 }
 415                         }
 416                         unset($post['remote_images']);
 417                 } elseif (isset($post['url']) && ($post['type'] == 'video')) {
 418                         $data = ParseUrl::getSiteinfoCached($post['url']);
 419
 420                         if (isset($data['images'][0])) {
 421                                 $post['image'] = $data['images'][0]['src'];
 422                         }
 423                 } elseif (preg_match_all("#\[url=([^\]]+?)\]\s*\[img\]([^\[]+?)\[/img\]\s*\[/url\]#ism", $post['text'], $pictures, PREG_SET_ORDER)) {
 424                         foreach ($pictures as $picture) {
 425                                 $post['text'] = trim(str_replace($picture[0], '', $post['text']));
 426                         }
 427                 }
 428
 429                 DI::profiler()->stopRecording();
 430                 return $post;
 431         }
 432
 433         /**
 434          * Remove [attachment] BBCode and replaces it with a regular [url]
 435          *
 436          * @param string  $body
 437          * @param boolean $no_link_desc No link description
 438          * @return string with replaced body
 439          */
 440         public static function removeAttachment(string $body, bool $no_link_desc = false): string
 441         {
 442                 return preg_replace_callback("/\s*\[attachment (.*?)\](.*?)\[\/attachment\]\s*/ism",
 443                         function ($match) use ($body, $no_link_desc) {
 444                                 $attach_data = self::getAttachmentData($match[0]);
 445                                 if (empty($attach_data['url'])) {
 446                                         return $match[0];
 447                                 } elseif (strpos(str_replace($match[0], '', $body), $attach_data['url']) !== false) {
 448                                         return '';
 449                                 } elseif (empty($attach_data['title']) || $no_link_desc) {
 450                                         return " \n[url]" . $attach_data['url'] . "[/url]\n";
 451                                 } else {
 452                                         return " \n[url=" . $attach_data['url'] . ']' . $attach_data['title'] . "[/url]\n";
 453                                 }
 454                 }, $body);
 455         }
 456
 457         /**
 458          * Converts a BBCode text into plaintext
 459          *
 460          * @param string $text
 461          * @param bool $keep_urls Whether to keep URLs in the resulting plaintext
 462          * @return string
 463          */
 464         public static function toPlaintext(string $text, bool $keep_urls = true): string
 465         {
 466                 DI::profiler()->startRecording('rendering');
 467                 // Remove pictures in advance to avoid unneeded proxy calls
 468                 $text = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", ' $2 ', $text);
 469                 $text = preg_replace("/\[img.*?\[\/img\]/ism", ' ', $text);
 470
 471                 // Remove attachment
 472                 $text = self::removeAttachment($text);
 473
 474                 $naked_text = HTML::toPlaintext(self::convert($text, false, 0, true), 0, !$keep_urls);
 475
 476                 DI::profiler()->stopRecording();
 477                 return $naked_text;
 478         }
 479
 480         private static function proxyUrl(string $image, int $simplehtml = self::INTERNAL, int $uriid = 0, string $size = ''): string
 481         {
 482                 // Only send proxied pictures to API and for internal display
 483                 if (!in_array($simplehtml, [self::INTERNAL, self::MASTODON_API, self::TWITTER_API])) {
 484                         return $image;
 485                 } elseif ($uriid > 0) {
 486                         return Post\Link::getByLink($uriid, $image, $size);
 487                 } else {
 488                         return Proxy::proxifyUrl($image, $size);
 489                 }
 490         }
 491
 492         /**
 493          * Truncates imported message body string length to max_import_size
 494          *
 495          * The purpose of this function is to apply system message length limits to
 496          * imported messages without including any embedded photos in the length
 497          *
 498          * @param string $body
 499          * @return string
 500          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 501          */
 502         public static function limitBodySize(string $body): string
 503         {
 504                 DI::profiler()->startRecording('rendering');
 505                 $maxlen = DI::config()->get('config', 'max_import_size', 0);
 506
 507                 // If the length of the body, including the embedded images, is smaller
 508                 // than the maximum, then don't waste time looking for the images
 509                 if ($maxlen && (strlen($body) > $maxlen)) {
 510
 511                         Logger::info('the total body length exceeds the limit', ['maxlen' => $maxlen, 'body_len' => strlen($body)]);
 512
 513                         $orig_body = $body;
 514                         $new_body = '';
 515                         $textlen = 0;
 516
 517                         $img_start = strpos($orig_body, '[img');
 518                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 519                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 520                         while (($img_st_close !== false) && ($img_end !== false)) {
 521
 522                                 $img_st_close++; // make it point to AFTER the closing bracket
 523                                 $img_end += $img_start;
 524                                 $img_end += strlen('[/img]');
 525
 526                                 if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 527                                         // This is an embedded image
 528
 529                                         if (($textlen + $img_start) > $maxlen) {
 530                                                 if ($textlen < $maxlen) {
 531                                                         Logger::debug('the limit happens before an embedded image');
 532                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 533                                                         $textlen = $maxlen;
 534                                                 }
 535                                         } else {
 536                                                 $new_body = $new_body . substr($orig_body, 0, $img_start);
 537                                                 $textlen += $img_start;
 538                                         }
 539
 540                                         $new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start);
 541                                 } else {
 542
 543                                         if (($textlen + $img_end) > $maxlen) {
 544                                                 if ($textlen < $maxlen) {
 545                                                         Logger::debug('the limit happens before the end of a non-embedded image');
 546                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 547                                                         $textlen = $maxlen;
 548                                                 }
 549                                         } else {
 550                                                 $new_body = $new_body . substr($orig_body, 0, $img_end);
 551                                                 $textlen += $img_end;
 552                                         }
 553                                 }
 554                                 $orig_body = substr($orig_body, $img_end);
 555
 556                                 if ($orig_body === false) {
 557                                         // in case the body ends on a closing image tag
 558                                         $orig_body = '';
 559                                 }
 560
 561                                 $img_start = strpos($orig_body, '[img');
 562                                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 563                                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 564                         }
 565
 566                         if (($textlen + strlen($orig_body)) > $maxlen) {
 567                                 if ($textlen < $maxlen) {
 568                                         Logger::debug('the limit happens after the end of the last image');
 569                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 570                                 }
 571                         } else {
 572                                 Logger::debug('the text size with embedded images extracted did not violate the limit');
 573                                 $new_body = $new_body . $orig_body;
 574                         }
 575
 576                         DI::profiler()->stopRecording();
 577                         return $new_body;
 578                 } else {
 579                         DI::profiler()->stopRecording();
 580                         return $body;
 581                 }
 582         }
 583
 584         /**
 585          * Processes [attachment] tags
 586          *
 587          * Note: Can produce a [bookmark] tag in the returned string
 588          *
 589          * @param string  $text
 590          * @param integer $simplehtml
 591          * @param bool    $tryoembed
 592          * @param array   $data
 593          * @param int     $uriid
 594          * @return string
 595          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 596          */
 597         public static function convertAttachment(string $text, int $simplehtml = self::INTERNAL, bool $tryoembed = true, array $data = [], int $uriid = 0, int $preview_mode = self::PREVIEW_LARGE): string
 598         {
 599                 DI::profiler()->startRecording('rendering');
 600                 $data = $data ?: self::getAttachmentData($text);
 601                 if (empty($data) || empty($data['url'])) {
 602                         DI::profiler()->stopRecording();
 603                         return $text;
 604                 }
 605
 606                 if (isset($data['title'])) {
 607                         $data['title'] = strip_tags($data['title']);
 608                         $data['title'] = str_replace(['http://', 'https://'], '', $data['title']);
 609                 } else {
 610                         $data['title'] = '';
 611                 }
 612
 613                 if (((strpos($data['text'], '[img=') !== false) || (strpos($data['text'], '[img]') !== false) || DI::config()->get('system', 'always_show_preview')) && !empty($data['image'])) {
 614                         $data['preview'] = $data['image'];
 615                         $data['image'] = '';
 616                 }
 617
 618                 $return = '';
 619                 try {
 620                         if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
 621                                 $return = OEmbed::getHTML($data['url'], $data['title']);
 622                         } else {
 623                                 throw new Exception('OEmbed is disabled for this attachment.');
 624                         }
 625                 } catch (Exception $e) {
 626                         $data['title'] = ($data['title'] ?? '') ?: $data['url'];
 627
 628                         if ($simplehtml != self::CONNECTORS) {
 629                                 $return = sprintf('<div class="type-%s">', $data['type']);
 630                         }
 631
 632                         if ($preview_mode == self::PREVIEW_NO_IMAGE) {
 633                                 unset($data['image']);
 634                                 unset($data['preview']);
 635                         }
 636
 637                         if (!empty($data['title']) && !empty($data['url'])) {
 638                                 $preview_class = $preview_mode == self::PREVIEW_LARGE ? 'attachment-image' : 'attachment-preview';
 639                                 if (!empty($data['image']) && empty($data['text']) && ($data['type'] == 'photo')) {
 640                                         $return .= sprintf('<a href="%s" target="_blank" rel="noopener noreferrer"><img src="%s" alt="" title="%s" class="' . $preview_class . '" /></a>', $data['url'], self::proxyUrl($data['image'], $simplehtml, $uriid), $data['title']);
 641                                 } else {
 642                                         if (!empty($data['image'])) {
 643                                                 $return .= sprintf('<a href="%s" target="_blank" rel="noopener noreferrer"><img src="%s" alt="" title="%s" class="' . $preview_class . '" /></a><br>', $data['url'], self::proxyUrl($data['image'], $simplehtml, $uriid), $data['title']);
 644                                         } elseif (!empty($data['preview'])) {
 645                                                 $return .= sprintf('<a href="%s" target="_blank" rel="noopener noreferrer"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br>', $data['url'], self::proxyUrl($data['preview'], $simplehtml, $uriid), $data['title']);
 646                                         }
 647                                         $return .= sprintf('<h4><a href="%s" target="_blank" rel="noopener noreferrer">%s</a></h4>', $data['url'], $data['title']);
 648                                 }
 649                         }
 650
 651                         if (!empty($data['description']) && $data['description'] != $data['title']) {
 652                                 // Sanitize the HTML
 653                                 $return .= sprintf('<blockquote>%s</blockquote>', trim(HTML::purify($data['description'])));
 654                         }
 655
 656                         if (!empty($data['provider_url']) && !empty($data['provider_name'])) {
 657                                 if (!empty($data['author_name'])) {
 658                                         $return .= sprintf('<sup><a href="%s" target="_blank" rel="noopener noreferrer">%s (%s)</a></sup>', $data['provider_url'], $data['author_name'], $data['provider_name']);
 659                                 } else {
 660                                         $return .= sprintf('<sup><a href="%s" target="_blank" rel="noopener noreferrer">%s</a></sup>', $data['provider_url'], $data['provider_name']);
 661                                 }
 662                         }
 663
 664                         if ($simplehtml != self::CONNECTORS) {
 665                                 $return .= '</div>';
 666                         }
 667                 }
 668
 669                 DI::profiler()->stopRecording();
 670                 return trim(($data['text'] ?? '') . ' ' . $return . ' ' . ($data['after'] ?? ''));
 671         }
 672
 673         public static function removeShareInformation(string $text, bool $plaintext = false, bool $nolink = false): string
 674         {
 675                 DI::profiler()->startRecording('rendering');
 676                 $data = self::getAttachmentData($text);
 677
 678                 if (!$data) {
 679                         DI::profiler()->stopRecording();
 680                         return $text;
 681                 } elseif ($nolink) {
 682                         DI::profiler()->stopRecording();
 683                         return $data['text'] . ($data['after'] ?? '');
 684                 }
 685
 686                 $title = htmlentities($data['title'] ?? '', ENT_QUOTES, 'UTF-8', false);
 687                 $text = htmlentities($data['text'], ENT_QUOTES, 'UTF-8', false);
 688                 if ($plaintext || (($title != '') && strstr($text, $title))) {
 689                         $data['title'] = $data['url'];
 690                 } elseif (($text != '') && strstr($title, $text)) {
 691                         $data['text'] = $data['title'];
 692                         $data['title'] = $data['url'];
 693                 }
 694
 695                 if (empty($data['text']) && !empty($data['title']) && empty($data['url'])) {
 696                         DI::profiler()->stopRecording();
 697                         return $data['title'] . $data['after'];
 698                 }
 699
 700                 // If the link already is included in the post, don't add it again
 701                 if (!empty($data['url']) && strpos($data['text'], $data['url'])) {
 702                         DI::profiler()->stopRecording();
 703                         return $data['text'] . $data['after'];
 704                 }
 705
 706                 $text = $data['text'];
 707
 708                 if (!empty($data['url']) && !empty($data['title'])) {
 709                         $text .= "\n[url=" . $data['url'] . ']' . $data['title'] . '[/url]';
 710                 } elseif (!empty($data['url'])) {
 711                         $text .= "\n[url]" . $data['url'] . '[/url]';
 712                 }
 713
 714                 DI::profiler()->stopRecording();
 715                 return $text . "\n" . $data['after'];
 716         }
 717
 718         /**
 719          * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 720          *
 721          * @param array $match Array with the matching values
 722          * @return string reformatted link including HTML codes
 723          */
 724         private static function convertUrlForActivityPubCallback(array $match): string
 725         {
 726                 $url = $match[1];
 727
 728                 if (isset($match[2]) && ($match[1] != $match[2])) {
 729                         return $match[0];
 730                 }
 731
 732                 $parts = parse_url($url);
 733                 if (!isset($parts['scheme'])) {
 734                         return $match[0];
 735                 }
 736
 737                 return self::convertUrlForActivityPub($url);
 738         }
 739
 740         /**
 741          * Converts [url] BBCodes in a format that looks fine on ActivityPub systems.
 742          *
 743          * @param string $url URL that is about to be reformatted
 744          * @return string reformatted link including HTML codes
 745          */
 746         private static function convertUrlForActivityPub(string $url): string
 747         {
 748                 return sprintf('<a href="%s" target="_blank" rel="noopener noreferrer">%s</a>', $url, self::getStyledURL($url));
 749         }
 750
 751         /**
 752          * Converts an URL in a nicer format (without the scheme and possibly shortened)
 753          *
 754          * @param string $url URL that is about to be reformatted
 755          * @return string reformatted link
 756          */
 757         private static function getStyledURL(string $url): string
 758         {
 759                 $parts = parse_url($url);
 760                 $scheme = $parts['scheme'] . '://';
 761                 $styled_url = str_replace($scheme, '', $url);
 762
 763                 if (strlen($styled_url) > 30) {
 764                         $styled_url = substr($styled_url, 0, 30) . "…";
 765                 }
 766
 767                 return $styled_url;
 768         }
 769
 770         /*
 771          * [noparse][i]italic[/i][/noparse] turns into
 772          * [noparse][ i ]italic[ /i ][/noparse],
 773          * to hide them from parser.
 774          *
 775          * @param array $match
 776          * @return string
 777          */
 778         private static function escapeNoparseCallback(array $match): string
 779         {
 780                 $whole_match = $match[0];
 781                 $captured = $match[1];
 782                 $spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
 783                 $new_str = str_replace($captured, $spacefied, $whole_match);
 784                 return $new_str;
 785         }
 786
 787         /*
 788          * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
 789          * now turns back and the [noparse] tags are trimed
 790          * returning [i]italic[/i]
 791          *
 792          * @param array $match
 793          * @return string
 794          */
 795         private static function unescapeNoparseCallback(array $match): string
 796         {
 797                 $captured = $match[1];
 798                 $unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
 799                 return $unspacefied;
 800         }
 801
 802         /**
 803          * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first
 804          * occurrences
 805          *
 806          * @param string $text        Text to search
 807          * @param string $name        Tag name
 808          * @param int    $occurrences Number of first occurrences to skip
 809          * @return boolean|array
 810          */
 811         public static function getTagPosition(string $text, string $name, int $occurrences = 0)
 812         {
 813                 DI::profiler()->startRecording('rendering');
 814                 if ($occurrences < 0) {
 815                         $occurrences = 0;
 816                 }
 817
 818                 $start_open = -1;
 819                 for ($i = 0; $i <= $occurrences; $i++) {
 820                         if ($start_open !== false) {
 821                                 $start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags
 822                         }
 823                 }
 824
 825                 if ($start_open === false) {
 826                         DI::profiler()->stopRecording();
 827                         return false;
 828                 }
 829
 830                 $start_equal = strpos($text, '=', $start_open);
 831                 $start_close = strpos($text, ']', $start_open);
 832
 833                 if ($start_close === false) {
 834                         DI::profiler()->stopRecording();
 835                         return false;
 836                 }
 837
 838                 $start_close++;
 839
 840                 $end_open = strpos($text, '[/' . $name . ']', $start_close);
 841
 842                 if ($end_open === false) {
 843                         DI::profiler()->stopRecording();
 844                         return false;
 845                 }
 846
 847                 $res = [
 848                         'start' => [
 849                                 'open' => $start_open,
 850                                 'close' => $start_close
 851                         ],
 852                         'end' => [
 853                                 'open' => $end_open,
 854                                 'close' => $end_open + strlen('[/' . $name . ']')
 855                         ],
 856                 ];
 857
 858                 if ($start_equal !== false) {
 859                         $res['start']['equal'] = $start_equal + 1;
 860                 }
 861
 862                 DI::profiler()->stopRecording();
 863                 return $res;
 864         }
 865
 866         /**
 867          * Performs a preg_replace within the boundaries of all named BBCode tags in a text
 868          *
 869          * @param string $pattern Preg pattern string
 870          * @param string $replace Preg replace string
 871          * @param string $name    BBCode tag name
 872          * @param string $text    Text to search
 873          * @return string
 874          */
 875         public static function pregReplaceInTag(string $pattern, string $replace, string $name, string $text): string
 876         {
 877                 DI::profiler()->startRecording('rendering');
 878                 $occurrences = 0;
 879                 $pos = self::getTagPosition($text, $name, $occurrences);
 880                 while ($pos !== false && $occurrences++ < 1000) {
 881                         $start = substr($text, 0, $pos['start']['open']);
 882                         $subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
 883                         $end = substr($text, $pos['end']['close']);
 884                         if ($end === false) {
 885                                 $end = '';
 886                         }
 887
 888                         $subject = preg_replace($pattern, $replace, $subject);
 889                         $text = $start . $subject . $end;
 890
 891                         $pos = self::getTagPosition($text, $name, $occurrences);
 892                 }
 893
 894                 DI::profiler()->stopRecording();
 895                 return $text;
 896         }
 897
 898         private static function extractImagesFromItemBody(string $body): array
 899         {
 900                 $saved_image = [];
 901                 $orig_body = $body;
 902                 $new_body = '';
 903
 904                 $cnt = 0;
 905                 $img_start = strpos($orig_body, '[img');
 906                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 907                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 908                 while (($img_st_close !== false) && ($img_end !== false)) {
 909                         $img_st_close++; // make it point to AFTER the closing bracket
 910                         $img_end += $img_start;
 911
 912                         if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 913                                 // This is an embedded image
 914                                 $saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
 915                                 $new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
 916
 917                                 $cnt++;
 918                         } else {
 919                                 $new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
 920                         }
 921
 922                         $orig_body = substr($orig_body, $img_end + strlen('[/img]'));
 923
 924                         if ($orig_body === false) {
 925                                 // in case the body ends on a closing image tag
 926                                 $orig_body = '';
 927                         }
 928
 929                         $img_start = strpos($orig_body, '[img');
 930                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 931                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 932                 }
 933
 934                 $new_body = $new_body . $orig_body;
 935
 936                 return ['body' => $new_body, 'images' => $saved_image];
 937         }
 938
 939         private static function interpolateSavedImagesIntoItemBody(int $uriid, string $body, array $images): string
 940         {
 941                 $newbody = $body;
 942
 943                 $cnt = 0;
 944                 foreach ($images as $image) {
 945                         // We're depending on the property of 'foreach' (specified on the PHP website) that
 946                         // it loops over the array starting from the first element and going sequentially
 947                         // to the last element
 948                         $newbody = str_replace('[$#saved_image' . $cnt . '#$]',
 949                                 '<img src="' . self::proxyUrl($image, self::INTERNAL, $uriid) . '" alt="' . DI::l10n()->t('Image/photo') . '" />', $newbody);
 950                         $cnt++;
 951                 }
 952
 953                 return $newbody;
 954         }
 955
 956         /**
 957          * @param string $text A BBCode string
 958          * @return array Empty array if no share tag is present or the following array, missing attributes end up empty strings:
 959          *               - comment   : Text before the opening share tag
 960          *               - shared    : Text inside the share tags
 961          *               - author    : (Optional) Display name of the shared author
 962          *               - profile   : (Optional) Profile page URL of the shared author
 963          *               - avatar    : (Optional) Profile picture URL of the shared author
 964          *               - link      : (Optional) Canonical URL of the shared post
 965          *               - posted    : (Optional) Date the shared post was initially posted ("Y-m-d H:i:s" in GMT)
 966          *               - message_id: (Optional) Shared post URI if any
 967          *               - guid      : (Optional) Shared post GUID if any
 968          */
 969         public static function fetchShareAttributes(string $text): array
 970         {
 971                 DI::profiler()->startRecording('rendering');
 972                 if (preg_match('~(.*?)\[share](.*)\[/share]~ism', $text, $matches)) {
 973                         DI::profiler()->stopRecording();
 974                         return [
 975                                 'author'     => '',
 976                                 'profile'    => '',
 977                                 'avatar'     => '',
 978                                 'link'       => '',
 979                                 'posted'     => '',
 980                                 'guid'       => '',
 981                                 'message_id' => trim($matches[2]),
 982                                 'comment'    => trim($matches[1]),
 983                                 'shared'     => '',
 984                         ];
 985                 }
 986                 // See Issue https://github.com/friendica/friendica/issues/10454
 987                 // Hashtags in usernames are expanded to links. This here is a quick fix.
 988                 $text = preg_replace('~([@!#])\[url=.*?](.*?)\[/url]~ism', '$1$2', $text);
 989
 990                 if (!preg_match('~(.*?)\[share(.*?)](.*)\[/share]~ism', $text, $matches)) {
 991                         DI::profiler()->stopRecording();
 992                         return [];
 993                 }
 994
 995                 $attributes = self::extractShareAttributes($matches[2]);
 996
 997                 $attributes['comment'] = trim($matches[1]);
 998                 $attributes['shared'] = trim($matches[3]);
 999
1000                 DI::profiler()->stopRecording();
1001                 return $attributes;
1002         }
1003
1004         /**
1005          * @see BBCode::fetchShareAttributes()
1006          * @param string $shareString Internal opening share tag string matched by the regular expression
1007          * @return array A fixed attribute array where missing attribute are represented by empty strings
1008          */
1009         private static function extractShareAttributes(string $shareString): array
1010         {
1011                 $attributes = [];
1012                 foreach (['author', 'profile', 'avatar', 'link', 'posted', 'guid', 'message_id'] as $field) {
1013                         preg_match("/$field=(['\"])(.+?)\\1/ism", $shareString, $matches);
1014                         $attributes[$field] = html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8');
1015                 }
1016
1017                 return $attributes;
1018         }
1019
1020         /**
1021          * Remove the share block
1022          *
1023          * @param string $body
1024          * @return string
1025          */
1026         public static function removeSharedData(string $body): string
1027         {
1028                 return trim(preg_replace("/\s*\[share.*?\].*?\[\/share\]\s*/ism", '', $body));
1029         }
1030
1031         /**
1032          * This function converts a [share] block to text according to a provided callback function whose signature is:
1033          *
1034          * function(array $attributes, array $author_contact, string $content, boolean $is_quote_share): string
1035          *
1036          * Where:
1037          * - $attributes is an array of attributes of the [share] block itself. Missing keys will be completed by the contact
1038          * data lookup
1039          * - $author_contact is a contact record array
1040          * - $content is the inner content of the [share] block
1041          * - $is_quote_share indicates whether there's any content before the [share] block
1042          * - Return value is the string that should replace the [share] block in the provided text
1043          *
1044          * This function is intended to be used by addon connector to format a share block like the target network is expecting it.
1045          *
1046          * @param  string   $text     A BBCode string
1047          * @param  callable $callback
1048          * @return string The BBCode string with all [share] blocks replaced
1049          */
1050         public static function convertShare(string $text, callable $callback, int $uriid = 0): string
1051         {
1052                 DI::profiler()->startRecording('rendering');
1053                 $return = preg_replace_callback(
1054                         '~(.*?)\[share(.*?)](.*)\[/share]~ism',
1055                         function ($match) use ($callback, $uriid) {
1056                                 $attributes = self::extractShareAttributes($match[2]);
1057
1058                                 $author_contact = Contact::getByURL($attributes['profile'], false, ['id', 'url', 'addr', 'name', 'micro']);
1059                                 $author_contact['url'] = ($author_contact['url'] ?? $attributes['profile']);
1060                                 $author_contact['addr'] = ($author_contact['addr'] ?? '');
1061
1062                                 $attributes['author']   = ($author_contact['name']  ?? '') ?: $attributes['author'];
1063                                 $attributes['avatar']   = ($author_contact['micro'] ?? '') ?: $attributes['avatar'];
1064                                 $attributes['profile']  = ($author_contact['url']   ?? '') ?: $attributes['profile'];
1065
1066                                 if (!empty($author_contact['id'])) {
1067                                         $attributes['avatar'] = Contact::getAvatarUrlForId($author_contact['id'], Proxy::SIZE_THUMB);
1068                                 } elseif ($attributes['avatar']) {
1069                                         $attributes['avatar'] = self::proxyUrl($attributes['avatar'], self::INTERNAL, $uriid, Proxy::SIZE_THUMB);
1070                                 }
1071
1072                                 $content = preg_replace(Strings::autoLinkRegEx(), '<a href="$1">$1</a>', $match[3]);
1073
1074                                 return $match[1] . $callback($attributes, $author_contact, $content, trim($match[1]) != '');
1075                         },
1076                         $text
1077                 );
1078
1079                 DI::profiler()->stopRecording();
1080                 return trim($return);
1081         }
1082
1083         /**
1084          * Convert complex IMG and ZMG elements
1085          *
1086          * @param [type] $text
1087          * @param integer $simplehtml
1088          * @param integer $uriid
1089          * @return string
1090          */
1091         private static function convertImages(string $text, int $simplehtml, int $uriid = 0): string
1092         {
1093                 DI::profiler()->startRecording('rendering');
1094                 $return = preg_replace_callback(
1095                         "/\[[zi]mg(.*?)\]([^\[\]]*)\[\/[zi]mg\]/ism",
1096                         function ($match) use ($simplehtml, $uriid) {
1097                                 $attribute_string = $match[1];
1098                                 $attributes = [];
1099                                 foreach (['alt', 'width', 'height'] as $field) {
1100                                         preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches);
1101                                         $attributes[$field] = html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8');
1102                                 }
1103
1104                                 $img_str = '<img src="' .
1105                                 self::proxyUrl($match[2], $simplehtml, $uriid) . '"';
1106                                 foreach ($attributes as $key => $value) {
1107                                         if (!empty($value)) {
1108                                                 $img_str .= ' ' . $key . '="' . htmlspecialchars($value, ENT_COMPAT) . '"';
1109                                         }
1110                                 }
1111                                 return $img_str . '>';
1112                         },
1113                         $text
1114                 );
1115
1116                 DI::profiler()->stopRecording();
1117                 return $return;
1118         }
1119
1120         /**
1121          * Default [share] tag conversion callback
1122          *
1123          * Note: Can produce a [bookmark] tag in the output
1124          *
1125          * @see BBCode::convertShare()
1126          * @param array   $attributes     [share] block attribute values
1127          * @param array   $author_contact Contact row of the shared author
1128          * @param string  $content        Inner content of the [share] block
1129          * @param boolean $is_quote_share Whether there is content before the [share] block
1130          * @param integer $simplehtml     Mysterious integer value depending on the target network/formatting style
1131          * @return string
1132          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1133          */
1134         private static function convertShareCallback(array $attributes, array $author_contact, string $content, bool $is_quote_share, int $simplehtml): string
1135         {
1136                 DI::profiler()->startRecording('rendering');
1137                 $mention = $attributes['author'] . ' (' . ($author_contact['addr'] ?? '') . ')';
1138
1139                 switch ($simplehtml) {
1140                         case self::MASTODON_API:
1141                         case self::TWITTER_API:
1142                                 $text = ($is_quote_share? '<br>' : '') .
1143                                 '<b><a href="' . $attributes['link'] . '">' . html_entity_decode('&#x2672;', ENT_QUOTES, 'UTF-8') . ' ' . $author_contact['addr'] . "</a>:</b><br>\n" .
1144                                 '<blockquote class="shared_content" dir="auto">' . $content . '</blockquote>';
1145                                 break;
1146                         case self::DIASPORA:
1147                                 if (stripos(Strings::normaliseLink($attributes['link']), 'http://twitter.com/') === 0) {
1148                                         $text = ($is_quote_share? '<hr />' : '') . '<p><a href="' . $attributes['link'] . '">' . $attributes['link'] . '</a></p>' . "\n";
1149                                 } else {
1150                                         $headline = '<p><b>♲ <a href="' . $attributes['profile'] . '">' . $attributes['author'] . '</a>:</b></p>' . "\n";
1151
1152                                         if (!empty($attributes['posted']) && !empty($attributes['link'])) {
1153                                                 $headline = '<p><b>♲ <a href="' . $attributes['profile'] . '">' . $attributes['author'] . '</a></b> - <a href="' . $attributes['link'] . '">' . $attributes['posted'] . ' GMT</a></p>' . "\n";
1154                                         }
1155
1156                                         $text = ($is_quote_share? '<hr />' : '') . $headline . '<blockquote>' . trim($content) . '</blockquote>' . "\n";
1157
1158                                         if (empty($attributes['posted']) && !empty($attributes['link'])) {
1159                                                 $text .= '<p><a href="' . $attributes['link'] . '">[Source]</a></p>' . "\n";
1160                                         }
1161                                 }
1162
1163                                 break;
1164                         case self::CONNECTORS:
1165                                 $headline = '<p><b>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8');
1166                                 $headline .= DI::l10n()->t('<a href="%1$s" target="_blank" rel="noopener noreferrer">%2$s</a> %3$s', $attributes['link'], $mention, $attributes['posted']);
1167                                 $headline .= ':</b></p>' . "\n";
1168
1169                                 $text = ($is_quote_share? '<hr />' : '') . $headline . '<blockquote class="shared_content" dir="auto">' . trim($content) . '</blockquote>' . "\n";
1170
1171                                 break;
1172                         case self::OSTATUS:
1173                                 $text = ($is_quote_share? '<br>' : '') . '<p>' . html_entity_decode('&#x2672; ', ENT_QUOTES, 'UTF-8') . ' @' . $author_contact['addr'] . ': ' . $content . '</p>' . "\n";
1174                                 break;
1175                         case self::ACTIVITYPUB:
1176                                 $author = '@<span class="vcard"><a href="' . $author_contact['url'] . '" class="url u-url mention" title="' . $author_contact['addr'] . '"><span class="fn nickname mention">' . $author_contact['addr'] . '</span></a>:</span>';
1177                                 $text = '<div><a href="' . $attributes['link'] . '">' . html_entity_decode('&#x2672;', ENT_QUOTES, 'UTF-8') . '</a> ' . $author . '<blockquote>' . $content . '</blockquote></div>' . "\n";
1178                                 break;
1179                         default:
1180                                 $text = ($is_quote_share? "\n" : '');
1181
1182                                 $contact = Contact::getByURL($attributes['profile'], false, ['network']);
1183                                 $network = $contact['network'] ?? Protocol::PHANTOM;
1184
1185                                 $tpl = Renderer::getMarkupTemplate('shared_content.tpl');
1186                                 $text .= Renderer::replaceMacros($tpl, [
1187                                         '$profile'      => $attributes['profile'],
1188                                         '$avatar'       => $attributes['avatar'],
1189                                         '$author'       => $attributes['author'],
1190                                         '$link'         => $attributes['link'],
1191                                         '$link_title'   => DI::l10n()->t('Link to source'),
1192                                         '$posted'       => $attributes['posted'],
1193                                         '$guid'         => $attributes['guid'],
1194                                         '$network_name' => ContactSelector::networkToName($network, $attributes['profile']),
1195                                         '$network_icon' => ContactSelector::networkToIcon($network, $attributes['profile']),
1196                                         '$content'      => self::TOP_ANCHOR . self::setMentions(trim($content), 0, $network) . self::BOTTOM_ANCHOR,
1197                                 ]);
1198                                 break;
1199                 }
1200
1201                 return $text;
1202         }
1203
1204         private static function removePictureLinksCallback(array $match): string
1205         {
1206                 $cache_key = 'remove:' . $match[1];
1207                 $text = DI::cache()->get($cache_key);
1208
1209                 if (is_null($text)) {
1210                         $curlResult = DI::httpClient()->head($match[1], [HttpClientOptions::TIMEOUT => DI::config()->get('system', 'xrd_timeout')]);
1211                         if ($curlResult->isSuccess()) {
1212                                 $mimetype = $curlResult->getHeader('Content-Type')[0] ?? '';
1213                         } else {
1214                                 $mimetype = '';
1215                         }
1216
1217                         if (substr($mimetype, 0, 6) == 'image/') {
1218                                 $text = '[url=' . $match[1] . ']' . $match[1] . '[/url]';
1219                         } else {
1220                                 $text = '[url=' . $match[2] . ']' . $match[2] . '[/url]';
1221
1222                                 // if its not a picture then look if its a page that contains a picture link
1223                                 $body = DI::httpClient()->fetch($match[1], HttpClientAccept::HTML, 0);
1224                                 if (empty($body)) {
1225                                         DI::cache()->set($cache_key, $text);
1226                                         return $text;
1227                                 }
1228
1229                                 $doc = new DOMDocument();
1230                                 @$doc->loadHTML($body);
1231                                 $xpath = new DOMXPath($doc);
1232                                 $list = $xpath->query('//meta[@name]');
1233                                 foreach ($list as $node) {
1234                                         $attr = [];
1235
1236                                         if ($node->attributes->length) {
1237                                                 foreach ($node->attributes as $attribute) {
1238                                                         $attr[$attribute->name] = $attribute->value;
1239                                                 }
1240                                         }
1241
1242                                         if (strtolower($attr['name']) == 'twitter:image') {
1243                                                 $text = '[url=' . $attr['content'] . ']' . $attr['content'] . '[/url]';
1244                                         }
1245                                 }
1246                         }
1247                         DI::cache()->set($cache_key, $text);
1248                 }
1249
1250                 return $text;
1251         }
1252
1253         /**
1254          * Callback: Expands links from given $match array
1255          *
1256          * @param array $match Array with link match
1257          * @return string BBCode
1258          */
1259         private static function expandLinksCallback(array $match): string
1260         {
1261                 if (($match[3] == '') || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
1262                         return ($match[1] . '[url]' . $match[2] . '[/url]');
1263                 } else {
1264                         return ($match[1] . $match[3] . ' [url]' . $match[2] . '[/url]');
1265                 }
1266         }
1267
1268         /**
1269          * Callback: Cleans picture links
1270          *
1271          * @param array $match Array with link match
1272          * @return string BBCode
1273          */
1274         private static function cleanPictureLinksCallback(array $match): string
1275         {
1276                 // When the picture link is the own photo path then we can avoid fetching the link
1277                 $own_photo_url = preg_quote(Strings::normaliseLink(DI::baseUrl()->get()) . '/photos/');
1278                 if (preg_match('|' . $own_photo_url . '.*?/image/|', Strings::normaliseLink($match[1]))) {
1279                         if (!empty($match[3])) {
1280                                 $text = '[img=' . str_replace('-1.', '-0.', $match[2]) . ']' . $match[3] . '[/img]';
1281                         } else {
1282                                 $text = '[img]' . str_replace('-1.', '-0.', $match[2]) . '[/img]';
1283                         }
1284                         return $text;
1285                 }
1286
1287                 $cache_key = 'clean:' . $match[1];
1288                 $text = DI::cache()->get($cache_key);
1289                 if (!is_null($text)) {
1290                         return $text;
1291                 }
1292
1293                 $curlResult = DI::httpClient()->head($match[1], [HttpClientOptions::TIMEOUT => DI::config()->get('system', 'xrd_timeout')]);
1294                 if ($curlResult->isSuccess()) {
1295                         $mimetype = $curlResult->getHeader('Content-Type')[0] ?? '';
1296                 } else {
1297                         $mimetype = '';
1298                 }
1299
1300                 // if its a link to a picture then embed this picture
1301                 if (substr($mimetype, 0, 6) == 'image/') {
1302                         $text = '[img]' . $match[1] . '[/img]';
1303                 } else {
1304                         if (!empty($match[3])) {
1305                                 $text = '[img=' . $match[2] . ']' . $match[3] . '[/img]';
1306                         } else {
1307                                 $text = '[img]' . $match[2] . '[/img]';
1308                         }
1309
1310                         // if its not a picture then look if its a page that contains a picture link
1311                         $body = DI::httpClient()->fetch($match[1], HttpClientAccept::HTML, 0);
1312                         if (empty($body)) {
1313                                 DI::cache()->set($cache_key, $text);
1314                                 return $text;
1315                         }
1316
1317                         $doc = new DOMDocument();
1318                         @$doc->loadHTML($body);
1319                         $xpath = new DOMXPath($doc);
1320                         $list = $xpath->query('//meta[@name]');
1321                         foreach ($list as $node) {
1322                                 $attr = [];
1323                                 if ($node->attributes->length) {
1324                                         foreach ($node->attributes as $attribute) {
1325                                                 $attr[$attribute->name] = $attribute->value;
1326                                         }
1327                                 }
1328
1329                                 if (strtolower($attr['name']) == "twitter:image") {
1330                                         if (!empty($match[3])) {
1331                                                 $text = "[img=" . $attr['content'] . "]" . $match[3] . "[/img]";
1332                                         } else {
1333                                                 $text = "[img]" . $attr['content'] . "[/img]";
1334                                         }
1335                                 }
1336                         }
1337                 }
1338                 DI::cache()->set($cache_key, $text);
1339
1340                 return $text;
1341         }
1342
1343         /**
1344          * Cleans picture links
1345          *
1346          * @param string $text HTML/BBCode string
1347          * @return string Cleaned HTML/BBCode
1348          */
1349         public static function cleanPictureLinks(string $text): string
1350         {
1351                 DI::profiler()->startRecording('rendering');
1352                 $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img=(.*)\](.*)\[\/img\]\[\/url\]&Usi", [self::class, 'cleanPictureLinksCallback'], $text);
1353                 $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", [self::class, 'cleanPictureLinksCallback'], $return);
1354                 DI::profiler()->stopRecording();
1355                 return $return;
1356         }
1357
1358         /**
1359          * Removes links
1360          *
1361          * @param string $text HTML/BBCode string
1362          * @return string Cleaned HTML/BBCode
1363          */
1364         public static function removeLinks(string $bbcode): string
1365         {
1366                 DI::profiler()->startRecording('rendering');
1367                 $bbcode = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", ' $1 ', $bbcode);
1368                 $bbcode = preg_replace("/\[img.*?\[\/img\]/ism", ' ', $bbcode);
1369
1370                 $bbcode = preg_replace('/[@!#]\[url\=.*?\].*?\[\/url\]/ism', '', $bbcode);
1371                 $bbcode = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $bbcode);
1372                 $bbcode = preg_replace('/[@!#]?\[url.*?\[\/url\]/ism', '', $bbcode);
1373                 DI::profiler()->stopRecording();
1374                 return $bbcode;
1375         }
1376
1377         /**
1378          * Replace names in mentions with nicknames
1379          *
1380          * @param string $body HTML/BBCode
1381          * @return string Body with replaced mentions
1382          */
1383         public static function setMentionsToNicknames(string $body): string
1384         {
1385                 DI::profiler()->startRecording('rendering');
1386                 $regexp = "/([@!])\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1387                 $body = preg_replace_callback($regexp, [self::class, 'mentionCallback'], $body);
1388                 DI::profiler()->stopRecording();
1389                 return $body;
1390         }
1391
1392         /**
1393          * Callback function to replace a Friendica style mention in a mention with the nickname
1394          *
1395          * @param array $match Matching values for the callback
1396          * @return string Replaced mention or empty string
1397          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1398          */
1399         private static function mentionCallback(array $match): string
1400         {
1401                 if (empty($match[2])) {
1402                         return '';
1403                 }
1404
1405                 $data = Contact::getByURL($match[2], false, ['url', 'nick']);
1406                 if (empty($data['nick'])) {
1407                         return $match[0];
1408                 }
1409
1410                 return $match[1] . '[url=' . $data['url'] . ']' . $data['nick'] . '[/url]';
1411         }
1412
1413         /**
1414          * Converts a BBCode message for a given URI-ID to a HTML message
1415          *
1416          * BBcode 2 HTML was written by WAY2WEB.net
1417          * extended to work with Mistpark/Friendica - Mike Macgirvin
1418          *
1419          * Simple HTML values meaning:
1420          * - 0: Friendica display
1421          * - 1: Unused
1422          * - 2: Used for Windows Phone push, Friendica API
1423          * - 3: Used before converting to Markdown in bb2diaspora.php
1424          * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
1425          * - 5: Unused
1426          * - 6: Unused
1427          * - 7: Used for dfrn, OStatus
1428          * - 8: Used for Twitter, WP backlink text setting
1429          * - 9: ActivityPub
1430          *
1431          * @param int    $uriid
1432          * @param string $text
1433          * @param int    $simple_html
1434          * @return string
1435          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1436          */
1437         public static function convertForUriId(int $uriid = null, string $text = null, int $simple_html = self::INTERNAL): string
1438         {
1439                 $try_oembed = ($simple_html == self::INTERNAL);
1440
1441                 return self::convert($text ?? '', $try_oembed, $simple_html, false, $uriid ?? 0);
1442         }
1443
1444         /**
1445          * Converts a BBCode message to HTML message
1446          *
1447          * BBcode 2 HTML was written by WAY2WEB.net
1448          * extended to work with Mistpark/Friendica - Mike Macgirvin
1449          *
1450          * Simple HTML values meaning:
1451          * - 0: Friendica display
1452          * - 1: Unused
1453          * - 2: Used for Windows Phone push, Friendica API
1454          * - 3: Used before converting to Markdown in bb2diaspora.php
1455          * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
1456          * - 5: Unused
1457          * - 6: Unused
1458          * - 7: Used for dfrn, OStatus
1459          * - 8: Used for Twitter, WP backlink text setting
1460          * - 9: ActivityPub
1461          *
1462          * @param string $text
1463          * @param bool   $try_oembed
1464          * @param int    $simple_html
1465          * @param bool   $for_plaintext
1466          * @param int    $uriid
1467          * @return string Converted code or empty string
1468          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1469          */
1470         public static function convert(string $text = null, bool $try_oembed = true, int $simple_html = self::INTERNAL, bool $for_plaintext = false, int $uriid = 0): string
1471         {
1472                 // Accounting for null default column values
1473                 if (is_null($text) || $text === '') {
1474                         return '';
1475                 }
1476
1477                 DI::profiler()->startRecording('rendering');
1478
1479                 Hook::callAll('bbcode', $text);
1480
1481                 $a = DI::app();
1482
1483                 $text = self::performWithEscapedTags($text, ['code'], function ($text) use ($try_oembed, $simple_html, $for_plaintext, $a, $uriid) {
1484                         $text = self::performWithEscapedTags($text, ['noparse', 'nobb', 'pre'], function ($text) use ($try_oembed, $simple_html, $for_plaintext, $a, $uriid) {
1485                                 /*
1486                                  * preg_match_callback function to replace potential Oembed tags with Oembed content
1487                                  *
1488                                  * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
1489                                  * $match[1] = $url
1490                                  * $match[2] = $title or absent
1491                                  */
1492                                 $try_oembed_callback = function (array $match)
1493                                 {
1494                                         $url = $match[1];
1495                                         $title = $match[2] ?? '';
1496
1497                                         try {
1498                                                 $return = OEmbed::getHTML($url, $title);
1499                                         } catch (Exception $ex) {
1500                                                 $return = $match[0];
1501                                         }
1502
1503                                         return $return;
1504                                 };
1505
1506                                 // Remove the abstract element. It is a non visible element.
1507                                 $text = self::stripAbstract($text);
1508
1509                                 // Line ending normalisation
1510                                 $text = str_replace("\r\n", "\n", $text);
1511
1512                                 // Move new lines outside of tags
1513                                 $text = preg_replace("#\[(\w*)](\n*)#ism", '$2[$1]', $text);
1514                                 $text = preg_replace("#(\n*)\[/(\w*)]#ism", '[/$2]$1', $text);
1515
1516                                 // Extract the private images which use data urls since preg has issues with
1517                                 // large data sizes. Stash them away while we do bbcode conversion, and then put them back
1518                                 // in after we've done all the regex matching. We cannot use any preg functions to do this.
1519
1520                                 $extracted = self::extractImagesFromItemBody($text);
1521                                 $text = $extracted['body'];
1522                                 $saved_image = $extracted['images'];
1523
1524                                 // If we find any event code, turn it into an event.
1525                                 // After we're finished processing the bbcode we'll
1526                                 // replace all of the event code with a reformatted version.
1527
1528                                 $ev = Event::fromBBCode($text);
1529
1530                                 // Replace any html brackets with HTML Entities to prevent executing HTML or script
1531                                 // Don't use strip_tags here because it breaks [url] search by replacing & with amp
1532
1533                                 $text = str_replace("<", "&lt;", $text);
1534                                 $text = str_replace(">", "&gt;", $text);
1535
1536                                 // remove some newlines before the general conversion
1537                                 $text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1]$2[/share]\n", $text);
1538                                 $text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "\n[quote$1]$2[/quote]\n", $text);
1539
1540                                 // when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
1541                                 if (!$try_oembed) {
1542                                         $text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text);
1543                                 }
1544
1545                                 // Remove linefeeds inside of the table elements. See issue #6799
1546                                 $search = ["\n[th]", "[th]\n", " [th]", "\n[/th]", "[/th]\n", "[/th] ",
1547                                         "\n[td]", "[td]\n", " [td]", "\n[/td]", "[/td]\n", "[/td] ",
1548                                         "\n[tr]", "[tr]\n", " [tr]", "[tr] ", "\n[/tr]", "[/tr]\n", " [/tr]", "[/tr] ",
1549                                         "\n[hr]", "[hr]\n", " [hr]", "[hr] ",
1550                                         "\n[attachment ", " [attachment ", "\n[/attachment]", "[/attachment]\n", " [/attachment]", "[/attachment] ",
1551                                         "[table]\n", "[table] ", " [table]", "\n[/table]", " [/table]", "[/table] "];
1552                                 $replace = ["[th]", "[th]", "[th]", "[/th]", "[/th]", "[/th]",
1553                                         "[td]", "[td]", "[td]", "[/td]", "[/td]", "[/td]",
1554                                         "[tr]", "[tr]", "[tr]", "[tr]", "[/tr]", "[/tr]", "[/tr]", "[/tr]",
1555                                         "[hr]", "[hr]", "[hr]", "[hr]",
1556                                         "[attachment ", "[attachment ", "[/attachment]", "[/attachment]", "[/attachment]", "[/attachment]",
1557                                         "[table]", "[table]", "[table]", "[/table]", "[/table]", "[/table]"];
1558                                 do {
1559                                         $oldtext = $text;
1560                                         $text = str_replace($search, $replace, $text);
1561                                 } while ($oldtext != $text);
1562
1563                                 // Replace these here only once
1564                                 $search = ["\n[table]", "[/table]\n"];
1565                                 $replace = ["[table]", "[/table]"];
1566                                 $text = str_replace($search, $replace, $text);
1567
1568                                 // Trim new lines regardless of the system.remove_multiplicated_lines config value
1569                                 $text = trim($text, "\n");
1570
1571                                 // removing multiplicated newlines
1572                                 if (DI::config()->get('system', 'remove_multiplicated_lines')) {
1573                                         $search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[*]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
1574                                                         "\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
1575                                         $replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[*]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
1576                                                         "[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
1577                                         do {
1578                                                 $oldtext = $text;
1579                                                 $text = str_replace($search, $replace, $text);
1580                                         } while ($oldtext != $text);
1581                                 }
1582
1583                                 /// @todo Have a closer look at the different html modes
1584                                 // Handle attached links or videos
1585                                 if (in_array($simple_html, [self::MASTODON_API, self::TWITTER_API, self::ACTIVITYPUB])) {
1586                                         $text = self::removeAttachment($text);
1587                                 } elseif (!in_array($simple_html, [self::INTERNAL, self::EXTERNAL, self::CONNECTORS])) {
1588                                         $text = self::removeAttachment($text, true);
1589                                 } else {
1590                                         $text = self::convertAttachment($text, $simple_html, $try_oembed, [], $uriid);
1591                                 }
1592
1593                                 $nosmile = strpos($text, '[nosmile]') !== false;
1594                                 $text = str_replace('[nosmile]', '', $text);
1595
1596                                 // Replace non graphical smilies for external posts
1597                                 if (!$nosmile) {
1598                                         $text = self::performWithEscapedTags($text, ['img'], function ($text) use ($simple_html, $for_plaintext) {
1599                                                 return Smilies::replace($text, ($simple_html != self::INTERNAL) || $for_plaintext);
1600                                         });
1601                                 }
1602
1603                                 // leave open the posibility of [map=something]
1604                                 // this is replaced in Item::prepareBody() which has knowledge of the item location
1605                                 if (strpos($text, '[/map]') !== false) {
1606                                         $text = preg_replace_callback(
1607                                                 "/\[map\](.*?)\[\/map\]/ism",
1608                                                 function ($match) use ($simple_html) {
1609                                                         return str_replace($match[0], '<p class="map">' . Map::byLocation($match[1], $simple_html) . '</p>', $match[0]);
1610                                                 },
1611                                                 $text
1612                                         );
1613                                 }
1614
1615                                 if (strpos($text, '[map=') !== false) {
1616                                         $text = preg_replace_callback(
1617                                                 "/\[map=(.*?)\]/ism",
1618                                                 function ($match) use ($simple_html) {
1619                                                         return str_replace($match[0], '<p class="map">' . Map::byCoordinates(str_replace('/', ' ', $match[1]), $simple_html) . '</p>', $match[0]);
1620                                                 },
1621                                                 $text
1622                                         );
1623                                 }
1624
1625                                 if (strpos($text, '[map]') !== false) {
1626                                         $text = preg_replace("/\[map\]/", '<p class="map"></p>', $text);
1627                                 }
1628
1629                                 // Check for headers
1630                                 $text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $text);
1631                                 $text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $text);
1632                                 $text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $text);
1633                                 $text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $text);
1634                                 $text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $text);
1635                                 $text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $text);
1636
1637                                 // Check for paragraph
1638                                 $text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $text);
1639
1640                                 // Check for bold text
1641                                 $text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $text);
1642
1643                                 // Check for Italics text
1644                                 $text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $text);
1645
1646                                 // Check for Underline text
1647                                 $text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $text);
1648
1649                                 // Check for strike-through text
1650                                 $text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<s>$1</s>', $text);
1651
1652                                 // Check for over-line text
1653                                 $text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $text);
1654
1655                                 // Check for colored text
1656                                 $text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $text);
1657
1658                                 // Check for sized text
1659                                 // [size=50] --> font-size: 50px (with the unit).
1660                                 if ($simple_html != self::DIASPORA) {
1661                                         $text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", '<span style="font-size:$1px;line-height:normal;">$2</span>', $text);
1662                                         $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", '<span style="font-size:$1;line-height:normal;">$2</span>', $text);
1663                                 } else {
1664                                         // Issue 2199: Diaspora doesn't interpret the construct above, nor the <small> or <big> element
1665                                         $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "$2", $text);
1666                                 }
1667
1668
1669                                 // Check for centered text
1670                                 $text = preg_replace("(\[center\](.*?)\[\/center\])ism", '<div style="text-align:center;">$1</div>', $text);
1671
1672                                 // Check for list text
1673                                 $text = str_replace("[*]", "<li>", $text);
1674
1675                                 // Check for block-level custom CSS
1676                                 $text = preg_replace('#(?<=^|\n)\[style=(.*?)](.*?)\[/style](?:\n|$)#ism', '<div style="$1">$2</div>', $text);
1677
1678                                 // Check for inline custom CSS
1679                                 $text = preg_replace("(\[style=(.*?)\](.*?)\[\/style\])ism", '<span style="$1">$2</span>', $text);
1680
1681                                 // Mastodon Emoji (internal tag, do not document for users)
1682                                 $text = preg_replace("(\[emoji=(.*?)](.*?)\[/emoji])ism", '<span class="mastodon emoji"><img src="$1" alt="$2" title="$2"/></span>', $text);
1683
1684                                 // Check for CSS classes
1685                                 // @deprecated since 2021.12, left for backward-compatibility reasons
1686                                 $text = preg_replace("(\[class=(.*?)\](.*?)\[\/class\])ism", '<span class="$1">$2</span>', $text);
1687                                 // Add HTML new lines
1688                                 $text = str_replace("\n", '<br>', $text);
1689
1690                                 // handle nested lists
1691                                 $endlessloop = 0;
1692
1693                                 while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) ||
1694                                                 ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) ||
1695                                                 ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) ||
1696                                                 ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) {
1697                                         $text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1698                                         $text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $text);
1699                                         $text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1700                                         $text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $text);
1701                                         $text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $text);
1702                                         $text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $text);
1703                                         $text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $text);
1704                                         $text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1705                                         $text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1706                                         $text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $text);
1707                                 }
1708
1709                                 $text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $text);
1710                                 $text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $text);
1711                                 $text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $text);
1712                                 $text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $text);
1713
1714                                 $text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $text);
1715                                 $text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $text);
1716
1717                                 $text = str_replace('[hr]', '<hr />', $text);
1718
1719                                 if (!$for_plaintext) {
1720                                         $text = self::performWithEscapedTags($text, ['url', 'img', 'audio', 'video', 'youtube', 'vimeo', 'share', 'attachment', 'iframe', 'bookmark'], function ($text) {
1721                                                 return preg_replace(Strings::autoLinkRegEx(), '[url]$1[/url]', $text);
1722                                         });
1723                                 }
1724
1725                                 // Check for font change text
1726                                 $text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $text);
1727
1728                                 // Declare the format for [spoiler] layout
1729                                 $SpoilerLayout = '<details class="spoiler"><summary>' . DI::l10n()->t('Click to open/close') . '</summary>$1</details>';
1730
1731                                 // Check for [spoiler] text
1732                                 // handle nested quotes
1733                                 $endlessloop = 0;
1734                                 while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
1735                                         $text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", $SpoilerLayout, $text);
1736                                 }
1737
1738                                 // Check for [spoiler=Title] text
1739
1740                                 // handle nested quotes
1741                                 $endlessloop = 0;
1742                                 while ((strpos($text, "[/spoiler]")!== false)  && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
1743                                         $text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
1744                                                 '<details class="spoiler"><summary>$1</summary>$2</details>',
1745                                                 $text);
1746                                 }
1747
1748                                 // Declare the format for [quote] layout
1749                                 $QuoteLayout = '<blockquote>$1</blockquote>';
1750
1751                                 // Check for [quote] text
1752                                 // handle nested quotes
1753                                 $endlessloop = 0;
1754                                 while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) {
1755                                         $text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text);
1756                                 }
1757
1758                                 // Check for [quote=Author] text
1759
1760                                 $t_wrote = DI::l10n()->t('$1 wrote:');
1761
1762                                 // handle nested quotes
1763                                 $endlessloop = 0;
1764                                 while ((strpos($text, "[/quote]")!== false)  && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) {
1765                                         $text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
1766                                                 "<p><strong class=".'"author"'.">" . $t_wrote . "</strong></p><blockquote>$2</blockquote>",
1767                                                 $text);
1768                                 }
1769
1770
1771                                 // [img=widthxheight]image source[/img]
1772                                 $text = preg_replace_callback(
1773                                         "/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism",
1774                                         function ($matches) use ($simple_html, $uriid) {
1775                                                 if (strpos($matches[3], "data:image/") === 0) {
1776                                                         return $matches[0];
1777                                                 }
1778
1779                                                 $matches[3] = self::proxyUrl($matches[3], $simple_html, $uriid);
1780                                                 return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
1781                                         },
1782                                         $text
1783                                 );
1784
1785                                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $text);
1786                                 $text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $text);
1787
1788                                 $text = preg_replace_callback("/\[img\=(.*?)\](.*?)\[\/img\]/ism",
1789                                         function ($matches) use ($simple_html, $uriid) {
1790                                                 $matches[1] = self::proxyUrl($matches[1], $simple_html, $uriid);
1791                                                 $matches[2] = htmlspecialchars($matches[2], ENT_COMPAT);
1792                                                 return '<img src="' . $matches[1] . '" alt="' . $matches[2] . '" title="' . $matches[2] . '">';
1793                                         },
1794                                         $text);
1795
1796                                 // Images
1797                                 // [img]pathtoimage[/img]
1798                                 $text = preg_replace_callback(
1799                                         "/\[img\](.*?)\[\/img\]/ism",
1800                                         function ($matches) use ($simple_html, $uriid) {
1801                                                 if (strpos($matches[1], "data:image/") === 0) {
1802                                                         return $matches[0];
1803                                                 }
1804
1805                                                 $matches[1] = self::proxyUrl($matches[1], $simple_html, $uriid);
1806                                                 return "[img]" . $matches[1] . "[/img]";
1807                                         },
1808                                         $text
1809                                 );
1810
1811                                 $text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . DI::l10n()->t('Image/photo') . '" />', $text);
1812                                 $text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . DI::l10n()->t('Image/photo') . '" />', $text);
1813
1814                                 $text = self::convertImages($text, $simple_html, $uriid);
1815
1816                                 $text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '<br><img src="' .DI::baseUrl() . '/images/lock_icon.gif" alt="' . DI::l10n()->t('Encrypted content') . '" title="' . DI::l10n()->t('Encrypted content') . '" /><br>', $text);
1817                                 $text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '<br><img src="' .DI::baseUrl() . '/images/lock_icon.gif" alt="' . DI::l10n()->t('Encrypted content') . '" title="' . '$1' . ' ' . DI::l10n()->t('Encrypted content') . '" /><br>', $text);
1818                                 //$text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '<br><img src="' .DI::baseUrl() . '/images/lock_icon.gif" alt="' . DI::l10n()->t('Encrypted content') . '" title="' . '$1' . ' ' . DI::l10n()->t('Encrypted content') . '" /><br>', $text);
1819
1820                                 // Simplify "video" element
1821                                 $text = preg_replace('(\[video[^\]]*?\ssrc\s?=\s?([^\s\]]+)[^\]]*?\].*?\[/video\])ism', '[video]$1[/video]', $text);
1822
1823                                 if ($try_oembed) {
1824                                         // html5 video and audio
1825                                         $text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4).*?)\[\/video\]/ism",
1826                                                 '<video src="$1" controls width="100%" height="auto"><a href="$1">$1</a></video>', $text);
1827
1828                                         $text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text);
1829                                         $text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text);
1830
1831                                         $text = preg_replace("/\[video\](.*?)\[\/video\]/ism",
1832                                                 '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>', $text);
1833                                         $text = preg_replace("/\[audio\](.*?)\[\/audio\]/ism", '<audio src="$1" controls><a href="$1">$1</a></audio>', $text);
1834                                 } else {
1835                                         $text = preg_replace("/\[video\](.*?)\[\/video\]/ism",
1836                                                 '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>', $text);
1837                                         $text = preg_replace("/\[audio\](.*?)\[\/audio\]/ism",
1838                                                 '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>', $text);
1839                                 }
1840
1841                                 // Backward compatibility, [iframe] support has been removed in version 2020.12
1842                                 $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $text);
1843
1844                                 // Youtube extensions
1845                                 if ($try_oembed) {
1846                                         $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1847                                         $text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1848                                         $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/shorts\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1849                                         $text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1850                                 }
1851
1852                                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1853                                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1854                                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/shorts\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1855                                 $text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1856
1857                                 if ($try_oembed) {
1858                                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '<iframe width="' . $a->getThemeInfoValue('videowidth') . '" height="' . $a->getThemeInfoValue('videoheight') . '" src="https://www.youtube.com/embed/$1" frameborder="0" ></iframe>', $text);
1859                                 } else {
1860                                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
1861                                                 '<a href="https://www.youtube.com/watch?v=$1" target="_blank" rel="noopener noreferrer">https://www.youtube.com/watch?v=$1</a>', $text);
1862                                 }
1863
1864                                 if ($try_oembed) {
1865                                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1866                                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1867                                 }
1868
1869                                 $text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1870                                 $text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1871
1872                                 if ($try_oembed) {
1873                                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '<iframe width="' . $a->getThemeInfoValue('videowidth') . '" height="' . $a->getThemeInfoValue('videoheight') . '" src="https://player.vimeo.com/video/$1" frameborder="0" ></iframe>', $text);
1874                                 } else {
1875                                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
1876                                                 '<a href="https://vimeo.com/$1" target="_blank" rel="noopener noreferrer">https://vimeo.com/$1</a>', $text);
1877                                 }
1878
1879                                 // oembed tag
1880                                 $text = OEmbed::BBCode2HTML($text);
1881
1882                                 // Avoid triple linefeeds through oembed
1883                                 $text = str_replace("<br style='clear:left'></span><br><br>", "<br style='clear:left'></span><br>", $text);
1884
1885                                 // If we found an event earlier, strip out all the event code and replace with a reformatted version.
1886                                 // Replace the event-start section with the entire formatted event. The other bbcode is stripped.
1887                                 // Summary (e.g. title) is required, earlier revisions only required description (in addition to
1888                                 // start which is always required). Allow desc with a missing summary for compatibility.
1889
1890                                 if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1891                                         $sub = Event::getHTML($ev, $simple_html, $uriid);
1892
1893                                         $text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
1894                                         $text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
1895                                         $text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text);
1896                                         $text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text);
1897                                         $text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text);
1898                                         $text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text);
1899                                 }
1900
1901                                 if (!$for_plaintext && DI::config()->get('system', 'big_emojis') && ($simple_html != self::DIASPORA)) {
1902                                         $conv = html_entity_decode(str_replace([' ', "\n", "\r"], '', $text));
1903                                         // Emojis are always 4 byte Unicode characters
1904                                         if (!empty($conv) && (strlen($conv) / mb_strlen($conv) == 4)) {
1905                                                 $text = '<span style="font-size: xx-large; line-height: normal;">' . $text . '</span>';
1906                                         }
1907                                 }
1908
1909                                 // Handle mentions and hashtag links
1910                                 if ($simple_html == self::DIASPORA) {
1911                                         // The ! is converted to @ since Diaspora only understands the @
1912                                         $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism",
1913                                                 '@<a href="$2">$3</a>',
1914                                                 $text);
1915                                 } elseif (in_array($simple_html, [self::OSTATUS, self::ACTIVITYPUB])) {
1916                                         $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism",
1917                                                 '<span class="h-card"><a href="$2" class="u-url mention">$1<span>$3</span></a></span>',
1918                                                 $text);
1919                                         $text = preg_replace("/([#])\[url\=(.*?)\](.*?)\[\/url\]/ism",
1920                                                 '<a href="$2" class="mention hashtag" rel="tag">$1<span>$3</span></a>',
1921                                                 $text);
1922                                 } elseif (in_array($simple_html, [self::INTERNAL, self::EXTERNAL, self::TWITTER_API])) {
1923                                         $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism",
1924                                                 '<bdi>$1<a href="$2" class="userinfo mention" title="$3">$3</a></bdi>',
1925                                                 $text);
1926                                 } elseif ($simple_html == self::MASTODON_API) {
1927                                         $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism",
1928                                                 '<a class="u-url mention status-link" href="$2" rel="nofollow noopener noreferrer" target="_blank" title="$3">$1<span>$3</span></a>',
1929                                                 $text);
1930                                         $text = preg_replace("/([#])\[url\=(.*?)\](.*?)\[\/url\]/ism",
1931                                                 '<a class="mention hashtag status-link" href="$2" rel="tag">$1<span>$3</span></a>',
1932                                                 $text);
1933                                 } else {
1934                                         $text = preg_replace("/([#@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '$1$3', $text);
1935                                 }
1936
1937                                 if (!$for_plaintext) {
1938                                         if (in_array($simple_html, [self::OSTATUS, self::MASTODON_API, self::TWITTER_API, self::ACTIVITYPUB])) {
1939                                                 $text = preg_replace_callback("/\[url\](.*?)\[\/url\]/ism", [self::class, 'convertUrlForActivityPubCallback'], $text);
1940                                                 $text = preg_replace_callback("/\[url\=(.*?)\](.*?)\[\/url\]/ism", [self::class, 'convertUrlForActivityPubCallback'], $text);
1941                                         }
1942                                 } else {
1943                                         $text = preg_replace("(\[url\](.*?)\[\/url\])ism", " $1 ", $text);
1944                                         $text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", [self::class, 'removePictureLinksCallback'], $text);
1945                                 }
1946
1947                                 // Bookmarks in red - will be converted to bookmarks in friendica
1948                                 $text = preg_replace("/#\^\[url\](.*?)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text);
1949                                 $text = preg_replace("/#\^\[url\=(.*?)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text);
1950                                 $text = preg_replace("/#\[url\=.*?\]\^\[\/url\]\[url\=(.*?)\](.*?)\[\/url\]/i",
1951                                                         "[bookmark=$1]$2[/bookmark]", $text);
1952
1953                                 if (in_array($simple_html, [self::OSTATUS, self::TWITTER])) {
1954                                         $text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", [self::class, 'expandLinksCallback'], $text);
1955                                         //$text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $text);
1956                                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]', $text);
1957                                 }
1958
1959                                 // Perform URL Search
1960                                 if ($try_oembed) {
1961                                         $text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text);
1962                                 }
1963
1964                                 $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text);
1965
1966                                 // Handle Diaspora posts
1967                                 $text = preg_replace_callback(
1968                                         "&\[url=/?posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
1969                                         function ($match) {
1970                                                 return "[url=" . DI::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]";
1971                                         }, $text
1972                                 );
1973
1974                                 $text = preg_replace_callback(
1975                                         "&\[url=/people\?q\=(.*)\](.*)\[\/url\]&Usi",
1976                                         function ($match) {
1977                                                 return "[url=" . DI::baseUrl() . "/search?search=%40" . $match[1] . "]" . $match[2] . "[/url]";
1978                                         }, $text
1979                                 );
1980
1981                                 // Server independent link to posts and comments
1982                                 // See issue: https://github.com/diaspora/diaspora_federation/issues/75
1983                                 $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
1984                                 $text = preg_replace($expression, DI::baseUrl()."/display/$1", $text);
1985
1986                                 /* Tag conversion
1987                                  * Supports:
1988                                  * - #[url=<anything>]<term>[/url]
1989                                  * - [url=<anything>]#<term>[/url]
1990                                  */
1991                                 self::performWithEscapedTags($text, ['url', 'share'], function ($text) use ($simple_html) {
1992                                         $text = preg_replace_callback("/(?:#\[url\=[^\[\]]*\]|\[url\=[^\[\]]*\]#)(.*?)\[\/url\]/ism", function($matches) use ($simple_html) {
1993                                                 if ($simple_html == self::ACTIVITYPUB) {
1994                                                         return '<a href="' . DI::baseUrl() . '/search?tag=' . rawurlencode($matches[1])
1995                                                                 . '" data-tag="' . XML::escape($matches[1]) . '" rel="tag ugc">#'
1996                                                                 . XML::escape($matches[1]) . '</a>';
1997                                                 } else {
1998                                                         return '#<a href="' . DI::baseUrl() . '/search?tag=' . rawurlencode($matches[1])
1999                                                                 . '" class="tag" rel="tag" title="' . XML::escape($matches[1]) . '">'
2000                                                                 . XML::escape($matches[1]) . '</a>';
2001                                                 }
2002                                         }, $text);
2003                                         return $text;
2004                                 });
2005
2006                                 // We need no target="_blank" rel="noopener noreferrer" for local links
2007                                 // convert links start with DI::baseUrl() as local link without the target="_blank" rel="noopener noreferrer" attribute
2008                                 $escapedBaseUrl = preg_quote(DI::baseUrl(), '/');
2009                                 $text = preg_replace("/\[url\](".$escapedBaseUrl.".*?)\[\/url\]/ism", '<a href="$1">$1</a>', $text);
2010                                 $text = preg_replace("/\[url\=(".$escapedBaseUrl.".*?)\](.*?)\[\/url\]/ism", '<a href="$1">$2</a>', $text);
2011
2012                                 $text = preg_replace("/\[url\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>', $text);
2013                                 $text = preg_replace("/\[url\=(.*?)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank" rel="noopener noreferrer">$2</a>', $text);
2014
2015                                 // Red compatibility, though the link can't be authenticated on Friendica
2016                                 $text = preg_replace("/\[zrl\=(.*?)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank" rel="noopener noreferrer">$2</a>', $text);
2017
2018
2019                                 // we may need to restrict this further if it picks up too many strays
2020                                 // link acct:user@host to a webfinger profile redirector
2021
2022                                 $text = preg_replace('/acct:([^@]+)@((?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63})/', '<a href="' . DI::baseUrl() . '/acctlink?addr=$1@$2" target="extlink">acct:$1@$2</a>', $text);
2023
2024                                 // Perform MAIL Search
2025                                 $text = preg_replace("/\[mail\](.*?)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $text);
2026                                 $text = preg_replace("/\[mail\=(.*?)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $text);
2027
2028                                 /// @todo What is the meaning of these lines?
2029                                 $text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $text);
2030                                 $text = preg_replace('/\&\#039\;/', '\'', $text);
2031
2032                                 // Currently deactivated, it made problems with " inside of alt texts.
2033                                 //$text = preg_replace('/\&quot\;/', '"', $text);
2034
2035                                 // fix any escaped ampersands that may have been converted into links
2036                                 $text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
2037
2038                                 // sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
2039                                 $allowed_src_protocols = ['//', 'http://', 'https://', 'contact/redir/', 'cid:'];
2040
2041                                 array_walk($allowed_src_protocols, function(&$value) { $value = preg_quote($value, '#');});
2042
2043                                 $text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
2044                                                          '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . DI::l10n()->t('Invalid source protocol') . '">', $text);
2045
2046                                 // sanitize href attributes (only allowlisted protocols URLs)
2047                                 // default value for backward compatibility
2048                                 $allowed_link_protocols = DI::config()->get('system', 'allowed_link_protocols', []);
2049
2050                                 // Always allowed protocol even if config isn't set or not including it
2051                                 $allowed_link_protocols[] = '//';
2052                                 $allowed_link_protocols[] = 'http://';
2053                                 $allowed_link_protocols[] = 'https://';
2054                                 $allowed_link_protocols[] = 'contact/redir/';
2055
2056                                 array_walk($allowed_link_protocols, function(&$value) { $value = preg_quote($value, '#');});
2057
2058                                 $regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
2059                                 $text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . DI::l10n()->t('Invalid link protocol') . '">', $text);
2060
2061                                 // Shared content
2062                                 $text = self::convertShare(
2063                                         $text,
2064                                         function (array $attributes, array $author_contact, $content, $is_quote_share) use ($simple_html) {
2065                                                 return self::convertShareCallback($attributes, $author_contact, $content, $is_quote_share, $simple_html);
2066                                         }, $uriid
2067                                 );
2068
2069                                 $text = self::interpolateSavedImagesIntoItemBody($uriid, $text, $saved_image);
2070
2071                                 return $text;
2072                         }); // Escaped noparse, nobb, pre
2073
2074                         // Remove escaping tags and replace new lines that remain
2075                         $text = preg_replace_callback('/\[(noparse|nobb)](.*?)\[\/\1]/ism', function ($match) {
2076                                 return str_replace("\n", "<br>", $match[2]);
2077                         }, $text);
2078
2079                         // Additionally, [pre] tags preserve spaces
2080                         $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", function ($match) {
2081                                 return str_replace([' ', "\n"], ['&nbsp;', "<br>"], htmlentities($match[1], ENT_NOQUOTES,'UTF-8'));
2082                         }, $text);
2083
2084                         return $text;
2085                 }); // Escaped code
2086
2087                 $text = preg_replace_callback("#\[code(?:=([^\]]*))?\](.*?)\[\/code\]#ism",
2088                         function ($matches) {
2089                                 if (strpos($matches[2], "\n") !== false) {
2090                                         $return = '<pre><code class="language-' . trim($matches[1]) . '">' . htmlentities(trim($matches[2], "\n\r"), ENT_NOQUOTES, 'UTF-8') . '</code></pre>';
2091                                 } else {
2092                                         $return = '<code>' . htmlentities($matches[2], ENT_NOQUOTES, 'UTF-8') . '</code>';
2093                                 }
2094
2095                                 return $return;
2096                         },
2097                         $text
2098                 );
2099
2100                 // Default iframe allowed domains/path
2101                 $allowedIframeDomains = [
2102                         DI::baseUrl()->getHostname()
2103                         . (DI::baseUrl()->getUrlPath() ? '/' . DI::baseUrl()->getUrlPath() : '')
2104                         . '/oembed/', # The path part has to change with the source in Content\Oembed::iframe
2105                         'www.youtube.com/embed/',
2106                         'player.vimeo.com/video/',
2107                 ];
2108
2109                 $allowedIframeDomains = array_merge(
2110                         $allowedIframeDomains,
2111                         DI::config()->get('system', 'allowed_oembed') ?
2112                                 explode(',', DI::config()->get('system', 'allowed_oembed'))
2113                                 : []
2114                 );
2115
2116                 $text = HTML::purify($text, $allowedIframeDomains);
2117                 DI::profiler()->stopRecording();
2118
2119                 return trim($text);
2120         }
2121
2122         /**
2123          * Strips the "abstract" tag from the provided text
2124          *
2125          * @param string $text The text with BBCode
2126          * @return string The same text - but without "abstract" element
2127          */
2128         public static function stripAbstract(string $text): string
2129         {
2130                 DI::profiler()->startRecording('rendering');
2131
2132                 $text = BBCode::performWithEscapedTags($text, ['code', 'noparse', 'nobb', 'pre'], function ($text) {
2133                         $text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", ' ', $text);
2134                         $text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", ' ', $text);
2135                         return $text;
2136                 });
2137
2138                 DI::profiler()->stopRecording();
2139                 return $text;
2140         }
2141
2142         /**
2143          * Returns the value of the "abstract" element
2144          *
2145          * @param string $text  The text that maybe contains the element
2146          * @param string $addon The addon for which the abstract is meant for
2147          * @return string The abstract
2148          */
2149         public static function getAbstract(string $text, string $addon = ''): string
2150         {
2151                 DI::profiler()->startRecording('rendering');
2152                 $addon = strtolower($addon);
2153
2154                 $abstract = BBCode::performWithEscapedTags($text, ['code', 'noparse', 'nobb', 'pre'], function ($text) use ($addon) {
2155                         if ($addon && preg_match('#\[abstract=' . preg_quote($addon, '#') . '](.*?)\[/abstract]#ism', $text, $matches)) {
2156                                 return $matches[1];
2157                         }
2158
2159                         if (preg_match("#\[abstract](.*?)\[/abstract]#ism", $text, $matches)) {
2160                                 return $matches[1];
2161                         }
2162
2163                         return '';
2164                 });
2165
2166                 DI::profiler()->stopRecording();
2167                 return $abstract;
2168         }
2169
2170         /**
2171          * Callback function to replace a Friendica style mention in a mention for Diaspora
2172          *
2173          * @param array $match Matching values for the callback
2174          *                     [1] = Mention type (! or @)
2175          *                     [2] = Name
2176          *                     [3] = Address
2177          * @return string Replaced mention
2178          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2179          * @throws \ImagickException
2180          */
2181         private static function bbCodeMention2DiasporaCallback(array $match): string
2182         {
2183                 $contact = Contact::getByURL($match[3], false, ['addr']);
2184                 if (empty($contact['addr'])) {
2185                         return $match[0];
2186                 }
2187
2188                 $mention = $match[1] . '{' . $match[2] . '; ' . $contact['addr'] . '}';
2189                 return $mention;
2190         }
2191
2192         /**
2193          * Converts a BBCode text into Markdown
2194          *
2195          * This function converts a BBCode item body to be sent to Markdown-enabled
2196          * systems like Diaspora and Libertree
2197          *
2198          * @param string $text
2199          * @param bool   $for_diaspora Diaspora requires more changes than Libertree
2200          * @return string
2201          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2202          */
2203         public static function toMarkdown(string $text, bool $for_diaspora = true): string
2204         {
2205                 DI::profiler()->startRecording('rendering');
2206                 $original_text = $text;
2207
2208                 // Since Diaspora is creating a summary for links, this function removes them before posting
2209                 if ($for_diaspora) {
2210                         $text = self::removeShareInformation($text);
2211                 }
2212
2213                 /**
2214                  * Transform #tags, strip off the [url] and replace spaces with underscore
2215                  */
2216                 $url_search_string = "^\[\]";
2217                 $text = preg_replace_callback("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/i",
2218                         function ($matches) {
2219                                 return '#' . str_replace(' ', '_', $matches[2]);
2220                         },
2221                         $text
2222                 );
2223
2224                 // Converting images with size parameters to simple images. Markdown doesn't know it.
2225                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text);
2226
2227                 // Convert it to HTML - don't try oembed
2228                 if ($for_diaspora) {
2229                         $text = self::convert($text, false, self::DIASPORA);
2230
2231                         // Add all tags that maybe were removed
2232                         if (preg_match_all("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/ism", $original_text, $tags)) {
2233                                 $tagline = '';
2234                                 foreach ($tags[2] as $tag) {
2235                                         $tag = html_entity_decode($tag, ENT_QUOTES, 'UTF-8');
2236                                         if (!strpos(html_entity_decode($text, ENT_QUOTES, 'UTF-8'), '#' . $tag)) {
2237                                                 $tagline .= '#' . $tag . ' ';
2238                                         }
2239                                 }
2240                                 $text = $text . ' ' . $tagline;
2241                         }
2242                 } else {
2243                         $text = self::convert($text, false, self::CONNECTORS);
2244                 }
2245
2246                 // If a link is followed by a quote then there should be a newline before it
2247                 // Maybe we should make this newline at every time before a quote.
2248                 $text = str_replace(['</a><blockquote>'], ['</a><br><blockquote>'], $text);
2249
2250                 // Now convert HTML to Markdown
2251                 $text = HTML::toMarkdown($text);
2252
2253                 // Libertree has a problem with escaped hashtags.
2254                 $text = str_replace(['\#'], ['#'], $text);
2255
2256                 // Remove any leading or trailing whitespace, as this will mess up
2257                 // the Diaspora signature verification and cause the item to disappear
2258                 $text = trim($text);
2259
2260                 if ($for_diaspora) {
2261                         $url_search_string = "^\[\]";
2262                         $text = preg_replace_callback(
2263                                 "/([@!])\[(.*?)\]\(([$url_search_string]*?)\)/ism",
2264                                 [self::class, 'bbCodeMention2DiasporaCallback'],
2265                                 $text
2266                         );
2267                 }
2268
2269                 Hook::callAll('bb2diaspora', $text);
2270
2271                 DI::profiler()->stopRecording();
2272                 return $text;
2273         }
2274
2275         /**
2276          * Pull out all #hashtags and @person tags from $string.
2277          *
2278          * We also get @person@domain.com - which would make
2279          * the regex quite complicated as tags can also
2280          * end a sentence. So we'll run through our results
2281          * and strip the period from any tags which end with one.
2282          * Returns array of tags found, or empty array.
2283          *
2284          * @param string $string Post content
2285          * @return array List of tag and person names
2286          */
2287         public static function getTags(string $string): array
2288         {
2289                 DI::profiler()->startRecording('rendering');
2290                 $ret = [];
2291
2292                 self::performWithEscapedTags($string, ['noparse', 'pre', 'code', 'img', 'attachment'], function ($string) use (&$ret) {
2293                         // Convert hashtag links to hashtags
2294                         $string = preg_replace('/#\[url\=([^\[\]]*)\](.*?)\[\/url\]/ism', '#$2 ', $string);
2295
2296                         // Force line feeds at bbtags
2297                         $string = str_replace(['[', ']'], ["\n[", "]\n"], $string);
2298
2299                         // ignore anything in a bbtag
2300                         $string = preg_replace('/\[(.*?)\]/sm', '', $string);
2301
2302                         // Match full names against @tags including the space between first and last
2303                         // We will look these up afterward to see if they are full names or not recognisable.
2304
2305                         if (preg_match_all('/(@[^ \x0D\x0A,:?]+ [^ \x0D\x0A@,:?]+)([ \x0D\x0A@,:?]|$)/', $string, $matches)) {
2306                                 foreach ($matches[1] as $match) {
2307                                         if (strstr($match, ']')) {
2308                                                 // we might be inside a bbcode color tag - leave it alone
2309                                                 continue;
2310                                         }
2311
2312                                         if (substr($match, -1, 1) === '.') {
2313                                                 $ret[] = substr($match, 0, -1);
2314                                         } else {
2315                                                 $ret[] = $match;
2316                                         }
2317                                 }
2318                         }
2319
2320                         // Otherwise pull out single word tags. These can be @nickname, @first_last
2321                         // and #hash tags.
2322
2323                         if (preg_match_all('/([!#@][^\^ \x0D\x0A,;:?\']*[^\^ \x0D\x0A,;:?!\'.])/', $string, $matches)) {
2324                                 foreach ($matches[1] as $match) {
2325                                         if (strstr($match, ']')) {
2326                                                 // we might be inside a bbcode color tag - leave it alone
2327                                                 continue;
2328                                         }
2329
2330                                         // try not to catch url fragments
2331                                         if (strpos($string, $match) && preg_match('/[a-zA-z0-9\/]/', substr($string, strpos($string, $match) - 1, 1))) {
2332                                                 continue;
2333                                         }
2334
2335                                         $ret[] = $match;
2336                                 }
2337                         }
2338                 });
2339
2340                 DI::profiler()->stopRecording();
2341                 return array_unique($ret);
2342         }
2343
2344         /**
2345          * Expand tags to URLs, checks the tag is at the start of a line or preceded by a non-word character
2346          *
2347          * @param string $body HTML/BBCode
2348          * @return string body with expanded tags
2349          */
2350         public static function expandTags(string $body): string
2351         {
2352                 return preg_replace_callback("/(?<=\W|^)([!#@])([^\^ \x0D\x0A,;:?'\"]*[^\^ \x0D\x0A,;:?!'\".])/",
2353                         function (array $match) {
2354                                 switch ($match[1]) {
2355                                         case '!':
2356                                         case '@':
2357                                                 $contact = Contact::getByURL($match[2]);
2358                                                 if (!empty($contact)) {
2359                                                         return $match[1] . '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
2360                                                 } else {
2361                                                         return $match[1] . $match[2];
2362                                                 }
2363                                                 break;
2364
2365                                         case '#':
2366                                         default:
2367                                                 return $match[1] . '[url=' . DI::baseUrl() . '/search?tag=' . $match[2] . ']' . $match[2] . '[/url]';
2368                                 }
2369                         }, $body);
2370         }
2371
2372         /**
2373          * Perform a custom function on a text after having escaped blocks enclosed in the provided tag list.
2374          *
2375          * @param string   $text HTML/BBCode
2376          * @param array    $tagList A list of tag names, e.g ['noparse', 'nobb', 'pre']
2377          * @param callable $callback
2378          * @return string
2379          * @see Strings::performWithEscapedBlocks
2380          */
2381         public static function performWithEscapedTags(string $text, array $tagList, callable $callback): string
2382         {
2383                 $tagList = array_map('preg_quote', $tagList);
2384
2385                 return Strings::performWithEscapedBlocks($text, '#\[(?:' . implode('|', $tagList) . ').*?\[/(?:' . implode('|', $tagList) . ')]#ism', $callback);
2386         }
2387
2388         /**
2389          * Replaces mentions in the provided message body in BBCode links for the provided user and network if any
2390          *
2391          * @param string $body HTML/BBCode
2392          * @param int $profile_uid Profile user id
2393          * @param string $network Network name
2394          * @return string HTML/BBCode with inserted images
2395          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2396          * @throws \ImagickException
2397          */
2398         public static function setMentions(string $body, $profile_uid = 0, $network = '')
2399         {
2400                 DI::profiler()->startRecording('rendering');
2401                 $body = self::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) use ($profile_uid, $network) {
2402                         $tags = self::getTags($body);
2403
2404                         $tagged = [];
2405
2406                         foreach ($tags as $tag) {
2407                                 $tag_type = substr($tag, 0, 1);
2408
2409                                 if ($tag_type == Tag::TAG_CHARACTER[Tag::HASHTAG]) {
2410                                         continue;
2411                                 }
2412
2413                                 /*
2414                                  * If we already tagged 'Robert Johnson', don't try and tag 'Robert'.
2415                                  * Robert Johnson should be first in the $tags array
2416                                  */
2417                                 foreach ($tagged as $nextTag) {
2418                                         if (stristr($nextTag, $tag . ' ')) {
2419                                                 continue 2;
2420                                         }
2421                                 }
2422
2423                                 if (($success = Item::replaceTag($body, $profile_uid, $tag, $network)) && $success['replaced']) {
2424                                         $tagged[] = $tag;
2425                                 }
2426                         }
2427
2428                         return $body;
2429                 });
2430
2431                 DI::profiler()->stopRecording();
2432                 return $body;
2433         }
2434
2435         /**
2436          * @param string      $author  Author display name
2437          * @param string      $profile Author profile URL
2438          * @param string      $avatar  Author profile picture URL
2439          * @param string      $link    Post source URL
2440          * @param string      $posted  Post created date
2441          * @param string|null $guid    Post guid (if any)
2442          * @param string|null $uri     Post uri (if any)
2443          * @return string
2444          * @TODO Rewrite to handle over whole record array
2445          */
2446         public static function getShareOpeningTag(string $author, string $profile, string $avatar, string $link, string $posted, string $guid = null, string $uri = null): string
2447         {
2448                 DI::profiler()->startRecording('rendering');
2449                 $header = "[share author='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $author) .
2450                         "' profile='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $profile) .
2451                         "' avatar='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $avatar) .
2452                         "' link='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $link) .
2453                         "' posted='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $posted);
2454
2455                 if ($guid) {
2456                         $header .= "' guid='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $guid);
2457                 }
2458
2459                 if ($uri) {
2460                         $header .= "' message_id='" . str_replace(["'", "[", "]"], ["&#x27;", "&#x5B;", "&#x5D;"], $uri);
2461                 }
2462
2463                 $header  .= "']";
2464
2465                 DI::profiler()->stopRecording();
2466                 return $header;
2467         }
2468
2469         /**
2470          * Returns the BBCode relevant to embed the provided URL in a post body.
2471          * For media type, it will return [img], [video] and [audio] tags.
2472          * For regular web pages, it will either output a [bookmark] tag if title and description were provided,
2473          * an [attachment] tag or a simple [url] tag depending on $tryAttachment.
2474          *
2475          * @param string      $url
2476          * @param bool        $tryAttachment
2477          * @param string|null $title
2478          * @param string|null $description
2479          * @param string|null $tags
2480          * @return string
2481          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2482          * @see ParseUrl::getSiteinfoCached
2483          */
2484         public static function embedURL(string $url, bool $tryAttachment = true, string $title = null, string $description = null, string $tags = null): string
2485         {
2486                 DI::profiler()->startRecording('rendering');
2487                 DI::logger()->info($url);
2488
2489                 // If there is already some content information submitted we don't
2490                 // need to parse the url for content.
2491                 if (!empty($title) && !empty($description)) {
2492                         $title = str_replace(["\r", "\n"], ['', ''], $title);
2493
2494                         $description = '[quote]' . trim($description) . '[/quote]' . "\n";
2495
2496                         $str_tags = '';
2497                         if (!empty($tags)) {
2498                                 $arr_tags = ParseUrl::convertTagsToArray($tags);
2499                                 if (count($arr_tags)) {
2500                                         $str_tags = "\n" . implode(' ', $arr_tags) . "\n";
2501                                 }
2502                         }
2503
2504                         $result = sprintf('[bookmark=%s]%s[/bookmark]%s', $url, ($title) ? $title : $url, $description) . $str_tags;
2505
2506                         DI::logger()->info('(unparsed): returns: ' . $result);
2507
2508                         DI::profiler()->stopRecording();
2509                         return $result;
2510                 }
2511
2512                 $siteinfo = ParseUrl::getSiteinfoCached($url);
2513
2514                 if (in_array($siteinfo['type'], ['image', 'video', 'audio'])) {
2515                         switch ($siteinfo['type']) {
2516                                 case 'video':
2517                                         $bbcode = "\n" . '[video]' . $url . '[/video]' . "\n";
2518                                         break;
2519                                 case 'audio':
2520                                         $bbcode = "\n" . '[audio]' . $url . '[/audio]' . "\n";
2521                                         break;
2522                                 default:
2523                                         $bbcode = "\n" . '[img]' . $url . '[/img]' . "\n";
2524                                         break;
2525                         }
2526
2527                         DI::profiler()->stopRecording();
2528                         return $bbcode;
2529                 }
2530
2531                 unset($siteinfo['keywords']);
2532
2533                 // Bypass attachment if parse url for a comment
2534                 if (!$tryAttachment) {
2535                         DI::profiler()->stopRecording();
2536                         return "\n" . '[url=' . $url . ']' . ($siteinfo['title'] ?? $url) . '[/url]';
2537                 }
2538
2539                 // Format it as BBCode attachment
2540                 $bbcode = "\n" . PageInfo::getFooterFromData($siteinfo);
2541                 DI::profiler()->stopRecording();
2542                 return $bbcode;
2543         }
2544 }