src/Content/Text/BBCode.php

   1 <?php
   2
   3 /**
   4  * @file src/Content/Text/BBCode.php
   5  */
   6
   7 namespace Friendica\Content\Text;
   8
   9 use DOMDocument;
  10 use DOMXPath;
  11 use Exception;
  12 use Friendica\BaseObject;
  13 use Friendica\Content\OEmbed;
  14 use Friendica\Content\Smilies;
  15 use Friendica\Core\Addon;
  16 use Friendica\Core\Cache;
  17 use Friendica\Core\Config;
  18 use Friendica\Core\L10n;
  19 use Friendica\Core\PConfig;
  20 use Friendica\Core\Protocol;
  21 use Friendica\Core\System;
  22 use Friendica\Model\Contact;
  23 use Friendica\Model\Event;
  24 use Friendica\Network\Probe;
  25 use Friendica\Object\Image;
  26 use Friendica\Util\Map;
  27 use Friendica\Util\Network;
  28 use Friendica\Util\ParseUrl;
  29 use League\HTMLToMarkdown\HtmlConverter;
  30
  31 require_once "mod/proxy.php";
  32
  33 class BBCode extends BaseObject
  34 {
  35         /**
  36          * @brief Fetches attachment data that were generated the old way
  37          *
  38          * @param string $body Message body
  39          * @return array
  40          * 'type' -> Message type ("link", "video", "photo")
  41          * 'text' -> Text before the shared message
  42          * 'after' -> Text after the shared message
  43          * 'image' -> Preview image of the message
  44          * 'url' -> Url to the attached message
  45          * 'title' -> Title of the attachment
  46          * 'description' -> Description of the attachment
  47          */
  48         private static function getOldAttachmentData($body)
  49         {
  50                 $post = [];
  51
  52                 // Simplify image codes
  53                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
  54
  55                 if (preg_match_all("(\[class=(.*?)\](.*?)\[\/class\])ism", $body, $attached, PREG_SET_ORDER)) {
  56                         foreach ($attached as $data) {
  57                                 if (!in_array($data[1], ["type-link", "type-video", "type-photo"])) {
  58                                         continue;
  59                                 }
  60
  61                                 $post["type"] = substr($data[1], 5);
  62
  63                                 $pos = strpos($body, $data[0]);
  64                                 if ($pos > 0) {
  65                                         $post["text"] = trim(substr($body, 0, $pos));
  66                                         $post["after"] = trim(substr($body, $pos + strlen($data[0])));
  67                                 } else {
  68                                         $post["text"] = trim(str_replace($data[0], "", $body));
  69                                 }
  70
  71                                 $attacheddata = $data[2];
  72
  73                                 $URLSearchString = "^\[\]";
  74
  75                                 if (preg_match("/\[img\]([$URLSearchString]*)\[\/img\]/ism", $attacheddata, $matches)) {
  76
  77                                         $picturedata = Image::getInfoFromURL($matches[1]);
  78
  79                                         if ($picturedata) {
  80                                                 if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) {
  81                                                         $post["image"] = $matches[1];
  82                                                 } else {
  83                                                         $post["preview"] = $matches[1];
  84                                                 }
  85                                         }
  86                                 }
  87
  88                                 if (preg_match("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) {
  89                                         $post["url"] = $matches[1];
  90                                         $post["title"] = $matches[2];
  91                                 }
  92                                 if (($post["url"] == "") && (in_array($post["type"], ["link", "video"]))
  93                                         && preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
  94                                         $post["url"] = $matches[1];
  95                                 }
  96
  97                                 // Search for description
  98                                 if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) {
  99                                         $post["description"] = $matches[1];
 100                                 }
 101                         }
 102                 }
 103                 return $post;
 104         }
 105
 106         /**
 107          * @brief Fetches attachment data that were generated with the "attachment" element
 108          *
 109          * @param string $body Message body
 110          * @return array
 111          * 'type' -> Message type ("link", "video", "photo")
 112          * 'text' -> Text before the shared message
 113          * 'after' -> Text after the shared message
 114          * 'image' -> Preview image of the message
 115          * 'url' -> Url to the attached message
 116          * 'title' -> Title of the attachment
 117          * 'description' -> Description of the attachment
 118          */
 119         public static function getAttachmentData($body)
 120         {
 121                 $data = [];
 122
 123                 if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
 124                         return self::getOldAttachmentData($body);
 125                 }
 126
 127                 $attributes = $match[2];
 128
 129                 $data["text"] = trim($match[1]);
 130
 131                 $type = "";
 132                 preg_match("/type='(.*?)'/ism", $attributes, $matches);
 133                 if (x($matches, 1)) {
 134                         $type = strtolower($matches[1]);
 135                 }
 136
 137                 preg_match('/type="(.*?)"/ism', $attributes, $matches);
 138                 if (x($matches, 1)) {
 139                         $type = strtolower($matches[1]);
 140                 }
 141
 142                 if ($type == "") {
 143                         return [];
 144                 }
 145
 146                 if (!in_array($type, ["link", "audio", "photo", "video"])) {
 147                         return [];
 148                 }
 149
 150                 if ($type != "") {
 151                         $data["type"] = $type;
 152                 }
 153
 154                 $url = "";
 155                 preg_match("/url='(.*?)'/ism", $attributes, $matches);
 156                 if (x($matches, 1)) {
 157                         $url = $matches[1];
 158                 }
 159
 160                 preg_match('/url="(.*?)"/ism', $attributes, $matches);
 161                 if (x($matches, 1)) {
 162                         $url = $matches[1];
 163                 }
 164
 165                 if ($url != "") {
 166                         $data["url"] = html_entity_decode($url, ENT_QUOTES, 'UTF-8');
 167                 }
 168
 169                 $title = "";
 170                 preg_match("/title='(.*?)'/ism", $attributes, $matches);
 171                 if (x($matches, 1)) {
 172                         $title = $matches[1];
 173                 }
 174
 175                 preg_match('/title="(.*?)"/ism', $attributes, $matches);
 176                 if (x($matches, 1)) {
 177                         $title = $matches[1];
 178                 }
 179
 180                 if ($title != "") {
 181                         $title = self::convert(html_entity_decode($title, ENT_QUOTES, 'UTF-8'), false, true);
 182                         $title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
 183                         $title = str_replace(["[", "]"], ["&#91;", "&#93;"], $title);
 184                         $data["title"] = $title;
 185                 }
 186
 187                 $image = "";
 188                 preg_match("/image='(.*?)'/ism", $attributes, $matches);
 189                 if (x($matches, 1)) {
 190                         $image = $matches[1];
 191                 }
 192
 193                 preg_match('/image="(.*?)"/ism', $attributes, $matches);
 194                 if (x($matches, 1)) {
 195                         $image = $matches[1];
 196                 }
 197
 198                 if ($image != "") {
 199                         $data["image"] = html_entity_decode($image, ENT_QUOTES, 'UTF-8');
 200                 }
 201
 202                 $preview = "";
 203                 preg_match("/preview='(.*?)'/ism", $attributes, $matches);
 204                 if (x($matches, 1)) {
 205                         $preview = $matches[1];
 206                 }
 207
 208                 preg_match('/preview="(.*?)"/ism', $attributes, $matches);
 209                 if (x($matches, 1)) {
 210                         $preview = $matches[1];
 211                 }
 212
 213                 if ($preview != "") {
 214                         $data["preview"] = html_entity_decode($preview, ENT_QUOTES, 'UTF-8');
 215                 }
 216
 217                 $data["description"] = trim($match[3]);
 218
 219                 $data["after"] = trim($match[4]);
 220
 221                 return $data;
 222         }
 223
 224         public static function getAttachedData($body, $item = [])
 225         {
 226                 /*
 227                 - text:
 228                 - type: link, video, photo
 229                 - title:
 230                 - url:
 231                 - image:
 232                 - description:
 233                 - (thumbnail)
 234                 */
 235
 236                 $has_title = !empty($item['title']);
 237                 $plink = (!empty($item['plink']) ? $item['plink'] : '');
 238                 $post = self::getAttachmentData($body);
 239
 240                 // if nothing is found, it maybe having an image.
 241                 if (!isset($post["type"])) {
 242                         // Simplify image codes
 243                         $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 244
 245                         $URLSearchString = "^\[\]";
 246
 247                         $body = preg_replace("/\[img\=([$URLSearchString]*)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $body);
 248
 249                         if (preg_match_all("(\[url=([$URLSearchString]*)\]\s*\[img\]([$URLSearchString]*)\[\/img\]\s*\[\/url\])ism", $body, $pictures, PREG_SET_ORDER)) {
 250                                 if ((count($pictures) == 1) && !$has_title) {
 251                                         // Checking, if the link goes to a picture
 252                                         $data = ParseUrl::getSiteinfoCached($pictures[0][1], true);
 253
 254                                         // Workaround:
 255                                         // Sometimes photo posts to the own album are not detected at the start.
 256                                         // So we seem to cannot use the cache for these cases. That's strange.
 257                                         if (($data["type"] != "photo") && strstr($pictures[0][1], "/photos/")) {
 258                                                 $data = ParseUrl::getSiteinfo($pictures[0][1], true);
 259                                         }
 260
 261                                         if ($data["type"] == "photo") {
 262                                                 $post["type"] = "photo";
 263                                                 if (isset($data["images"][0])) {
 264                                                         $post["image"] = $data["images"][0]["src"];
 265                                                         $post["url"] = $data["url"];
 266                                                 } else {
 267                                                         $post["image"] = $data["url"];
 268                                                 }
 269
 270                                                 $post["preview"] = $pictures[0][2];
 271                                                 $post["text"] = str_replace($pictures[0][0], "", $body);
 272                                         } else {
 273                                                 $imgdata = Image::getInfoFromURL($pictures[0][1]);
 274                                                 if ($imgdata && substr($imgdata["mime"], 0, 6) == "image/") {
 275                                                         $post["type"] = "photo";
 276                                                         $post["image"] = $pictures[0][1];
 277                                                         $post["preview"] = $pictures[0][2];
 278                                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 279                                                 }
 280                                         }
 281                                 } elseif (count($pictures) > 0) {
 282                                         $post["type"] = "link";
 283                                         $post["url"] = $plink;
 284                                         $post["image"] = $pictures[0][2];
 285                                         $post["text"] = $body;
 286                                 }
 287                         } elseif (preg_match_all("(\[img\]([$URLSearchString]*)\[\/img\])ism", $body, $pictures, PREG_SET_ORDER)) {
 288                                 if ((count($pictures) == 1) && !$has_title) {
 289                                         $post["type"] = "photo";
 290                                         $post["image"] = $pictures[0][1];
 291                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 292                                 } elseif (count($pictures) > 0) {
 293                                         $post["type"] = "link";
 294                                         $post["url"] = $plink;
 295                                         $post["image"] = $pictures[0][1];
 296                                         $post["text"] = $body;
 297                                 }
 298                         }
 299
 300                         // Test for the external links
 301                         preg_match_all("(\[url\]([$URLSearchString]*)\[\/url\])ism", $body, $links1, PREG_SET_ORDER);
 302                         preg_match_all("(\[url\=([$URLSearchString]*)\].*?\[\/url\])ism", $body, $links2, PREG_SET_ORDER);
 303
 304                         $links = array_merge($links1, $links2);
 305
 306                         // If there is only a single one, then use it.
 307                         // This should cover link posts via API.
 308                         if ((count($links) == 1) && !isset($post["preview"]) && !$has_title) {
 309                                 $post["type"] = "link";
 310                                 $post["text"] = trim($body);
 311                                 $post["url"] = $links[0][1];
 312                         }
 313
 314                         // Now count the number of external media links
 315                         preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $body, $links1, PREG_SET_ORDER);
 316                         preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $body, $links2, PREG_SET_ORDER);
 317                         preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $body, $links3, PREG_SET_ORDER);
 318                         preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $body, $links4, PREG_SET_ORDER);
 319
 320                         // Add them to the other external links
 321                         $links = array_merge($links, $links1, $links2, $links3, $links4);
 322
 323                         // Are there more than one?
 324                         if (count($links) > 1) {
 325                                 // The post will be the type "text", which means a blog post
 326                                 unset($post["type"]);
 327                                 $post["url"] = $plink;
 328                         }
 329
 330                         if (!isset($post["type"])) {
 331                                 $post["type"] = "text";
 332                                 $post["text"] = trim($body);
 333                         }
 334                 } elseif (isset($post["url"]) && ($post["type"] == "video")) {
 335                         $data = ParseUrl::getSiteinfoCached($post["url"], true);
 336
 337                         if (isset($data["images"][0])) {
 338                                 $post["image"] = $data["images"][0]["src"];
 339                         }
 340                 }
 341
 342                 return $post;
 343         }
 344
 345         /**
 346          * @brief Converts a BBCode text into plaintext
 347          *
 348          * @param bool $keep_urls Whether to keep URLs in the resulting plaintext
 349          *
 350          * @return string
 351          */
 352         public static function toPlaintext($text, $keep_urls = true)
 353         {
 354                 $naked_text = preg_replace('/\[(.+?)\]/','', $text);
 355                 if (!$keep_urls) {
 356                         $naked_text = preg_replace('#https?\://[^\s<]+[^\s\.\)]#i', '', $naked_text);
 357                 }
 358
 359                 return $naked_text;
 360         }
 361
 362         private static function proxyUrl($image, $simplehtml = false)
 363         {
 364                 // Only send proxied pictures to API and for internal display
 365                 if (in_array($simplehtml, [false, 2])) {
 366                         return proxy_url($image);
 367                 } else {
 368                         return $image;
 369                 }
 370         }
 371
 372         public static function scaleExternalImages($srctext, $include_link = true, $scale_replace = false)
 373         {
 374                 // Suppress "view full size"
 375                 if (intval(Config::get('system', 'no_view_full_size'))) {
 376                         $include_link = false;
 377                 }
 378
 379                 // Picture addresses can contain special characters
 380                 $s = htmlspecialchars_decode($srctext);
 381
 382                 $matches = null;
 383                 $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism', $s, $matches, PREG_SET_ORDER);
 384                 if ($c) {
 385                         foreach ($matches as $mtch) {
 386                                 logger('scale_external_image: ' . $mtch[1]);
 387
 388                                 $hostname = str_replace('www.', '', substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3));
 389                                 if (stristr($mtch[1], $hostname)) {
 390                                         continue;
 391                                 }
 392
 393                                 // $scale_replace, if passed, is an array of two elements. The
 394                                 // first is the name of the full-size image. The second is the
 395                                 // name of a remote, scaled-down version of the full size image.
 396                                 // This allows Friendica to display the smaller remote image if
 397                                 // one exists, while still linking to the full-size image
 398                                 if ($scale_replace) {
 399                                         $scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
 400                                 } else {
 401                                         $scaled = $mtch[1];
 402                                 }
 403                                 $i = Network::fetchUrl($scaled);
 404                                 if (!$i) {
 405                                         return $srctext;
 406                                 }
 407
 408                                 // guess mimetype from headers or filename
 409                                 $type = Image::guessType($mtch[1], true);
 410
 411                                 if ($i) {
 412                                         $Image = new Image($i, $type);
 413                                         if ($Image->isValid()) {
 414                                                 $orig_width = $Image->getWidth();
 415                                                 $orig_height = $Image->getHeight();
 416
 417                                                 if ($orig_width > 640 || $orig_height > 640) {
 418                                                         $Image->scaleDown(640);
 419                                                         $new_width = $Image->getWidth();
 420                                                         $new_height = $Image->getHeight();
 421                                                         logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
 422                                                         $s = str_replace(
 423                                                                 $mtch[0],
 424                                                                 '[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
 425                                                                 . "\n" . (($include_link)
 426                                                                         ? '[url=' . $mtch[1] . ']' . L10n::t('view full size') . '[/url]' . "\n"
 427                                                                         : ''),
 428                                                                 $s
 429                                                         );
 430                                                         logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
 431                                                 }
 432                                         }
 433                                 }
 434                         }
 435                 }
 436
 437                 // replace the special char encoding
 438                 $s = htmlspecialchars($s, ENT_NOQUOTES, 'UTF-8');
 439                 return $s;
 440         }
 441
 442         /**
 443          * The purpose of this function is to apply system message length limits to
 444          * imported messages without including any embedded photos in the length
 445          *
 446          * @brief Truncates imported message body string length to max_import_size
 447          * @param string $body
 448          * @return string
 449          */
 450         public static function limitBodySize($body)
 451         {
 452                 $maxlen = get_max_import_size();
 453
 454                 // If the length of the body, including the embedded images, is smaller
 455                 // than the maximum, then don't waste time looking for the images
 456                 if ($maxlen && (strlen($body) > $maxlen)) {
 457
 458                         logger('the total body length exceeds the limit', LOGGER_DEBUG);
 459
 460                         $orig_body = $body;
 461                         $new_body = '';
 462                         $textlen = 0;
 463
 464                         $img_start = strpos($orig_body, '[img');
 465                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 466                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 467                         while (($img_st_close !== false) && ($img_end !== false)) {
 468
 469                                 $img_st_close++; // make it point to AFTER the closing bracket
 470                                 $img_end += $img_start;
 471                                 $img_end += strlen('[/img]');
 472
 473                                 if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 474                                         // This is an embedded image
 475
 476                                         if (($textlen + $img_start) > $maxlen) {
 477                                                 if ($textlen < $maxlen) {
 478                                                         logger('the limit happens before an embedded image', LOGGER_DEBUG);
 479                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 480                                                         $textlen = $maxlen;
 481                                                 }
 482                                         } else {
 483                                                 $new_body = $new_body . substr($orig_body, 0, $img_start);
 484                                                 $textlen += $img_start;
 485                                         }
 486
 487                                         $new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start);
 488                                 } else {
 489
 490                                         if (($textlen + $img_end) > $maxlen) {
 491                                                 if ($textlen < $maxlen) {
 492                                                         logger('the limit happens before the end of a non-embedded image', LOGGER_DEBUG);
 493                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 494                                                         $textlen = $maxlen;
 495                                                 }
 496                                         } else {
 497                                                 $new_body = $new_body . substr($orig_body, 0, $img_end);
 498                                                 $textlen += $img_end;
 499                                         }
 500                                 }
 501                                 $orig_body = substr($orig_body, $img_end);
 502
 503                                 if ($orig_body === false) {
 504                                         // in case the body ends on a closing image tag
 505                                         $orig_body = '';
 506                                 }
 507
 508                                 $img_start = strpos($orig_body, '[img');
 509                                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 510                                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 511                         }
 512
 513                         if (($textlen + strlen($orig_body)) > $maxlen) {
 514                                 if ($textlen < $maxlen) {
 515                                         logger('the limit happens after the end of the last image', LOGGER_DEBUG);
 516                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 517                                 }
 518                         } else {
 519                                 logger('the text size with embedded images extracted did not violate the limit', LOGGER_DEBUG);
 520                                 $new_body = $new_body . $orig_body;
 521                         }
 522
 523                         return $new_body;
 524                 } else {
 525                         return $body;
 526                 }
 527         }
 528
 529         /**
 530          * Processes [attachment] tags
 531          *
 532          * Note: Can produce a [bookmark] tag in the returned string
 533          *
 534          * @brief Processes [attachment] tags
 535          * @param string $return
 536          * @param bool|int $simplehtml
 537          * @param bool $tryoembed
 538          * @return string
 539          */
 540         private static function convertAttachment($return, $simplehtml = false, $tryoembed = true)
 541         {
 542                 $data = self::getAttachmentData($return);
 543                 if (!$data) {
 544                         return $return;
 545                 }
 546
 547                 if (isset($data["title"])) {
 548                         $data["title"] = strip_tags($data["title"]);
 549                         $data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
 550                 }
 551
 552                 if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && ($data["image"] != "")) {
 553                         $data["preview"] = $data["image"];
 554                         $data["image"] = "";
 555                 }
 556
 557                 $return = '';
 558                 if ($simplehtml == 7) {
 559                         $return = self::convertUrlForOStatus($data["url"]);
 560                 } elseif (($simplehtml != 4) && ($simplehtml != 0)) {
 561                         $return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
 562                 } else {
 563                         try {
 564                                 if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
 565                                         $return = OEmbed::getHTML($data['url'], $data['title']);
 566                                 } else {
 567                                         throw new Exception('OEmbed is disabled for this attachment.');
 568                                 }
 569                         } catch (Exception $e) {
 570                                 if ($simplehtml != 4) {
 571                                         $return = sprintf('<div class="type-%s">', $data["type"]);
 572                                 }
 573
 574                                 if ($data["image"] != "") {
 575                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], self::proxyUrl($data["image"], $simplehtml), $data["title"]);
 576                                 } elseif ($data["preview"] != "") {
 577                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], self::proxyUrl($data["preview"], $simplehtml), $data["title"]);
 578                                 }
 579
 580                                 if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
 581                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], self::proxyUrl($data["image"], $simplehtml), $data["title"]);
 582                                 } else {
 583                                         $return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
 584                                 }
 585
 586                                 if ($data["description"] != "" && $data["description"] != $data["title"]) {
 587                                         // Sanitize the HTML by converting it to BBCode
 588                                         $bbcode = HTML::toBBCode($data["description"]);
 589                                         $return .= sprintf('<blockquote>%s</blockquote>', trim(self::convert($bbcode)));
 590                                 }
 591                                 if ($data["type"] == "link") {
 592                                         $return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
 593                                 }
 594
 595                                 if ($simplehtml != 4) {
 596                                         $return .= '</div>';
 597                                 }
 598                         }
 599                 }
 600
 601                 return trim($data["text"] . ' ' . $return . ' ' . $data["after"]);
 602         }
 603
 604         public static function removeShareInformation($Text, $plaintext = false, $nolink = false)
 605         {
 606                 $data = self::getAttachmentData($Text);
 607
 608                 if (!$data) {
 609                         return $Text;
 610                 } elseif ($nolink) {
 611                         return $data["text"] . $data["after"];
 612                 }
 613
 614                 $title = htmlentities($data["title"], ENT_QUOTES, 'UTF-8', false);
 615                 $text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
 616                 if ($plaintext || (($title != "") && strstr($text, $title))) {
 617                         $data["title"] = $data["url"];
 618                 } elseif (($text != "") && strstr($title, $text)) {
 619                         $data["text"] = $data["title"];
 620                         $data["title"] = $data["url"];
 621                 }
 622
 623                 if (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
 624                         return $data["title"] . $data["after"];
 625                 }
 626
 627                 // If the link already is included in the post, don't add it again
 628                 if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
 629                         return $data["text"] . $data["after"];
 630                 }
 631
 632                 $text = $data["text"];
 633
 634                 if (($data["url"] != "") && ($data["title"] != "")) {
 635                         $text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
 636                 } elseif (($data["url"] != "")) {
 637                         $text .= "\n[url]" . $data["url"] . "[/url]";
 638                 }
 639
 640                 return $text . "\n" . $data["after"];
 641         }
 642
 643         /**
 644          * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 645          *
 646          * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 647          * @param array $match Array with the matching values
 648          * @return string reformatted link including HTML codes
 649          */
 650         private static function convertUrlForOStatusCallback($match)
 651         {
 652                 $url = $match[1];
 653
 654                 if (isset($match[2]) && ($match[1] != $match[2])) {
 655                         return $match[0];
 656                 }
 657
 658                 $parts = parse_url($url);
 659                 if (!isset($parts['scheme'])) {
 660                         return $match[0];
 661                 }
 662
 663                 return self::convertUrlForOStatus($url);
 664         }
 665
 666         /**
 667          * @brief Converts [url] BBCodes in a format that looks fine on OStatus systems.
 668          * @param string $url URL that is about to be reformatted
 669          * @return string reformatted link including HTML codes
 670          */
 671         private static function convertUrlForOStatus($url)
 672         {
 673                 $parts = parse_url($url);
 674                 $scheme = $parts['scheme'] . '://';
 675                 $styled_url = str_replace($scheme, '', $url);
 676
 677                 if (strlen($styled_url) > 30) {
 678                         $styled_url = substr($styled_url, 0, 30) . "…";
 679                 }
 680
 681                 $html = '<a href="%s" target="_blank">%s</a>';
 682
 683                 return sprintf($html, $url, $styled_url);
 684         }
 685
 686         /*
 687          * [noparse][i]italic[/i][/noparse] turns into
 688          * [noparse][ i ]italic[ /i ][/noparse],
 689          * to hide them from parser.
 690          */
 691         private static function escapeNoparseCallback($match)
 692         {
 693                 $whole_match = $match[0];
 694                 $captured = $match[1];
 695                 $spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
 696                 $new_str = str_replace($captured, $spacefied, $whole_match);
 697                 return $new_str;
 698         }
 699
 700         /*
 701          * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
 702          * now turns back and the [noparse] tags are trimed
 703          * returning [i]italic[/i]
 704          */
 705         private static function unescapeNoparseCallback($match)
 706         {
 707                 $captured = $match[1];
 708                 $unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
 709                 return $unspacefied;
 710         }
 711
 712         /**
 713          * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first
 714          * occurrences
 715          *
 716          * @param string $text        Text to search
 717          * @param string $name        Tag name
 718          * @param int    $occurrences Number of first occurrences to skip
 719          * @return boolean|array
 720          */
 721         public static function getTagPosition($text, $name, $occurrences = 0)
 722         {
 723                 if ($occurrences < 0) {
 724                         $occurrences = 0;
 725                 }
 726
 727                 $start_open = -1;
 728                 for ($i = 0; $i <= $occurrences; $i++) {
 729                         if ($start_open !== false) {
 730                                 $start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags
 731                         }
 732                 }
 733
 734                 if ($start_open === false) {
 735                         return false;
 736                 }
 737
 738                 $start_equal = strpos($text, '=', $start_open);
 739                 $start_close = strpos($text, ']', $start_open);
 740
 741                 if ($start_close === false) {
 742                         return false;
 743                 }
 744
 745                 $start_close++;
 746
 747                 $end_open = strpos($text, '[/' . $name . ']', $start_close);
 748
 749                 if ($end_open === false) {
 750                         return false;
 751                 }
 752
 753                 $res = [
 754                         'start' => [
 755                                 'open' => $start_open,
 756                                 'close' => $start_close
 757                         ],
 758                         'end' => [
 759                                 'open' => $end_open,
 760                                 'close' => $end_open + strlen('[/' . $name . ']')
 761                         ],
 762                 ];
 763
 764                 if ($start_equal !== false) {
 765                         $res['start']['equal'] = $start_equal + 1;
 766                 }
 767
 768                 return $res;
 769         }
 770
 771         /**
 772          * Performs a preg_replace within the boundaries of all named BBCode tags in a text
 773          *
 774          * @param type $pattern Preg pattern string
 775          * @param type $replace Preg replace string
 776          * @param type $name    BBCode tag name
 777          * @param type $text    Text to search
 778          * @return string
 779          */
 780         public static function pregReplaceInTag($pattern, $replace, $name, $text)
 781         {
 782                 $occurrences = 0;
 783                 $pos = self::getTagPosition($text, $name, $occurrences);
 784                 while ($pos !== false && $occurrences++ < 1000) {
 785                         $start = substr($text, 0, $pos['start']['open']);
 786                         $subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
 787                         $end = substr($text, $pos['end']['close']);
 788                         if ($end === false) {
 789                                 $end = '';
 790                         }
 791
 792                         $subject = preg_replace($pattern, $replace, $subject);
 793                         $text = $start . $subject . $end;
 794
 795                         $pos = self::getTagPosition($text, $name, $occurrences);
 796                 }
 797
 798                 return $text;
 799         }
 800
 801         private static function extractImagesFromItemBody($body)
 802         {
 803                 $saved_image = [];
 804                 $orig_body = $body;
 805                 $new_body = '';
 806
 807                 $cnt = 0;
 808                 $img_start = strpos($orig_body, '[img');
 809                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 810                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 811                 while (($img_st_close !== false) && ($img_end !== false)) {
 812                         $img_st_close++; // make it point to AFTER the closing bracket
 813                         $img_end += $img_start;
 814
 815                         if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 816                                 // This is an embedded image
 817                                 $saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
 818                                 $new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
 819
 820                                 $cnt++;
 821                         } else {
 822                                 $new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
 823                         }
 824
 825                         $orig_body = substr($orig_body, $img_end + strlen('[/img]'));
 826
 827                         if ($orig_body === false) {
 828                                 // in case the body ends on a closing image tag
 829                                 $orig_body = '';
 830                         }
 831
 832                         $img_start = strpos($orig_body, '[img');
 833                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 834                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 835                 }
 836
 837                 $new_body = $new_body . $orig_body;
 838
 839                 return ['body' => $new_body, 'images' => $saved_image];
 840         }
 841
 842         private static function interpolateSavedImagesIntoItemBody($body, array $images)
 843         {
 844                 $newbody = $body;
 845
 846                 $cnt = 0;
 847                 foreach ($images as $image) {
 848                         // We're depending on the property of 'foreach' (specified on the PHP website) that
 849                         // it loops over the array starting from the first element and going sequentially
 850                         // to the last element
 851                         $newbody = str_replace('[$#saved_image' . $cnt . '#$]',
 852                                 '<img src="' . self::proxyUrl($image) . '" alt="' . L10n::t('Image/photo') . '" />', $newbody);
 853                         $cnt++;
 854                 }
 855
 856                 return $newbody;
 857         }
 858
 859         /**
 860          * Processes [share] tags
 861          *
 862          * Note: Can produce a [bookmark] tag in the output
 863          *
 864          * @brief Processes [share] tags
 865          * @param array    $share      preg_match_callback result array
 866          * @param bool|int $simplehtml
 867          * @return string
 868          */
 869         private static function convertShare($share, $simplehtml)
 870         {
 871                 $attributes = $share[2];
 872
 873                 $author = "";
 874                 preg_match("/author='(.*?)'/ism", $attributes, $matches);
 875                 if (x($matches, 1)) {
 876                         $author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
 877                 }
 878
 879                 preg_match('/author="(.*?)"/ism', $attributes, $matches);
 880                 if (x($matches, 1)) {
 881                         $author = $matches[1];
 882                 }
 883
 884                 $profile = "";
 885                 preg_match("/profile='(.*?)'/ism", $attributes, $matches);
 886                 if (x($matches, 1)) {
 887                         $profile = $matches[1];
 888                 }
 889
 890                 preg_match('/profile="(.*?)"/ism', $attributes, $matches);
 891                 if (x($matches, 1)) {
 892                         $profile = $matches[1];
 893                 }
 894
 895                 $avatar = "";
 896                 preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
 897                 if (x($matches, 1)) {
 898                         $avatar = $matches[1];
 899                 }
 900
 901                 preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
 902                 if (x($matches, 1)) {
 903                         $avatar = $matches[1];
 904                 }
 905
 906                 $link = "";
 907                 preg_match("/link='(.*?)'/ism", $attributes, $matches);
 908                 if (x($matches, 1)) {
 909                         $link = $matches[1];
 910                 }
 911
 912                 preg_match('/link="(.*?)"/ism', $attributes, $matches);
 913                 if (x($matches, 1)) {
 914                         $link = $matches[1];
 915                 }
 916
 917                 $posted = "";
 918
 919                 preg_match("/posted='(.*?)'/ism", $attributes, $matches);
 920                 if (x($matches, 1)) {
 921                         $posted = $matches[1];
 922                 }
 923
 924                 preg_match('/posted="(.*?)"/ism', $attributes, $matches);
 925                 if (x($matches, 1)) {
 926                         $posted = $matches[1];
 927                 }
 928
 929                 // We only call this so that a previously unknown contact can be added.
 930                 // This is important for the function "Model\Contact::getDetailsByURL()".
 931                 // This function then can fetch an entry from the contact table.
 932                 Contact::getIdForURL($profile, 0, true);
 933
 934                 $data = Contact::getDetailsByURL($profile);
 935
 936                 if (x($data, "name") && x($data, "addr")) {
 937                         $userid_compact = $data["name"] . " (" . $data["addr"] . ")";
 938                 } else {
 939                         $userid_compact = Protocol::getAddrFromProfileUrl($profile, $author);
 940                 }
 941
 942                 if (x($data, "addr")) {
 943                         $userid = $data["addr"];
 944                 } else {
 945                         $userid = Protocol::formatMention($profile, $author);
 946                 }
 947
 948                 if (x($data, "name")) {
 949                         $author = $data["name"];
 950                 }
 951
 952                 if (x($data, "micro")) {
 953                         $avatar = $data["micro"];
 954                 }
 955
 956                 $preshare = trim($share[1]);
 957                 if ($preshare != "") {
 958                         $preshare .= "<br />";
 959                 }
 960
 961                 switch ($simplehtml) {
 962                         case 1:
 963                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' <a href="' . $profile . '">' . $userid . "</a>: <br />»" . $share[3] . "«";
 964                                 break;
 965                         case 2:
 966                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
 967                                 break;
 968                         case 3: // Diaspora
 969                                 $headline = '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';
 970
 971                                 $text = trim($share[1]);
 972
 973                                 if ($text != "") {
 974                                         $text .= "<hr />";
 975                                 }
 976
 977                                 if (stripos(normalise_link($link), 'http://twitter.com/') === 0) {
 978                                         $text .= '<br /><a href="' . $link . '">' . $link . '</a>';
 979                                 } else {
 980                                         $text .= $headline . '<blockquote>' . trim($share[3]) . "</blockquote><br />";
 981
 982                                         if ($link != "") {
 983                                                 $text .= '<br /><a href="' . $link . '">[l]</a>';
 984                                         }
 985                                 }
 986
 987                                 break;
 988                         case 4:
 989                                 $headline = '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
 990                                 $headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
 991                                 $headline .= ":</b><br />";
 992
 993                                 $text = trim($share[1]);
 994
 995                                 if ($text != "") {
 996                                         $text .= "<hr />";
 997                                 }
 998
 999                                 $text .= $headline . '<blockquote class="shared_content">' . trim($share[3]) . "</blockquote><br />";
1000
1001                                 break;
1002                         case 5:
1003                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1004                                 break;
1005                         case 6: // app.net
1006                                 $text = $preshare . "&gt;&gt; @" . $userid_compact . ": <br />" . $share[3];
1007                                 break;
1008                         case 7: // statusnet/GNU Social
1009                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . " @" . $userid_compact . ": " . $share[3];
1010                                 break;
1011                         case 8: // twitter
1012                                 $text = $preshare . "RT @" . $userid_compact . ": " . $share[3];
1013                                 break;
1014                         case 9: // Google+/Facebook
1015                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1016
1017                                 if ($link != "") {
1018                                         $text .= "<br /><br />" . $link;
1019                                 }
1020                                 break;
1021                         default:
1022                                 // Transforms quoted tweets in rich attachments to avoid nested tweets
1023                                 if (stripos(normalise_link($link), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($link)) {
1024                                         try {
1025                                                 $oembed = OEmbed::getHTML($link, $preshare);
1026                                         } catch (Exception $e) {
1027                                                 $oembed = sprintf('[bookmark=%s]%s[/bookmark]', $link, $preshare);
1028                                         }
1029
1030                                         $text = $preshare . $oembed;
1031                                 } else {
1032                                         $text = trim($share[1]) . "\n";
1033
1034                                         $avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);
1035
1036                                         $tpl = get_markup_template('shared_content.tpl');
1037                                         $text .= replace_macros($tpl, [
1038                                                 '$profile' => $profile,
1039                                                 '$avatar' => $avatar,
1040                                                 '$author' => $author,
1041                                                 '$link' => $link,
1042                                                 '$posted' => $posted,
1043                                                 '$content' => trim($share[3])
1044                                         ]);
1045                                 }
1046                                 break;
1047                 }
1048
1049                 return $text;
1050         }
1051
1052         private static function removePictureLinksCallback($match)
1053         {
1054                 $text = Cache::get($match[1]);
1055
1056                 if (is_null($text)) {
1057                         $a = self::getApp();
1058
1059                         $stamp1 = microtime(true);
1060
1061                         $ch = @curl_init($match[1]);
1062                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1063                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1064                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
1065                         @curl_exec($ch);
1066                         $curl_info = @curl_getinfo($ch);
1067
1068                         $a->save_timestamp($stamp1, "network");
1069
1070                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1071                                 $text = "[url=" . $match[1] . "]" . $match[1] . "[/url]";
1072                         } else {
1073                                 $text = "[url=" . $match[2] . "]" . $match[2] . "[/url]";
1074
1075                                 // if its not a picture then look if its a page that contains a picture link
1076                                 $body = Network::fetchUrl($match[1]);
1077
1078                                 $doc = new DOMDocument();
1079                                 @$doc->loadHTML($body);
1080                                 $xpath = new DOMXPath($doc);
1081                                 $list = $xpath->query("//meta[@name]");
1082                                 foreach ($list as $node) {
1083                                         $attr = [];
1084
1085                                         if ($node->attributes->length) {
1086                                                 foreach ($node->attributes as $attribute) {
1087                                                         $attr[$attribute->name] = $attribute->value;
1088                                                 }
1089                                         }
1090
1091                                         if (strtolower($attr["name"]) == "twitter:image") {
1092                                                 $text = "[url=" . $attr["content"] . "]" . $attr["content"] . "[/url]";
1093                                         }
1094                                 }
1095                         }
1096                         Cache::set($match[1], $text);
1097                 }
1098
1099                 return $text;
1100         }
1101
1102         private static function expandLinksCallback($match)
1103         {
1104                 if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
1105                         return ($match[1] . "[url]" . $match[2] . "[/url]");
1106                 } else {
1107                         return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
1108                 }
1109         }
1110
1111         private static function cleanPictureLinksCallback($match)
1112         {
1113                 $text = Cache::get($match[1]);
1114
1115                 if (is_null($text)) {
1116                         $a = self::getApp();
1117
1118                         $stamp1 = microtime(true);
1119
1120                         $ch = @curl_init($match[1]);
1121                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1122                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1123                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
1124                         @curl_exec($ch);
1125                         $curl_info = @curl_getinfo($ch);
1126
1127                         $a->save_timestamp($stamp1, "network");
1128
1129                         // if its a link to a picture then embed this picture
1130                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1131                                 $text = "[img]" . $match[1] . "[/img]";
1132                         } else {
1133                                 $text = "[img]" . $match[2] . "[/img]";
1134
1135                                 // if its not a picture then look if its a page that contains a picture link
1136                                 $body = Network::fetchUrl($match[1]);
1137
1138                                 $doc = new DOMDocument();
1139                                 @$doc->loadHTML($body);
1140                                 $xpath = new DOMXPath($doc);
1141                                 $list = $xpath->query("//meta[@name]");
1142                                 foreach ($list as $node) {
1143                                         $attr = [];
1144                                         if ($node->attributes->length) {
1145                                                 foreach ($node->attributes as $attribute) {
1146                                                         $attr[$attribute->name] = $attribute->value;
1147                                                 }
1148                                         }
1149
1150                                         if (strtolower($attr["name"]) == "twitter:image") {
1151                                                 $text = "[img]" . $attr["content"] . "[/img]";
1152                                         }
1153                                 }
1154                         }
1155                         Cache::set($match[1], $text);
1156                 }
1157
1158                 return $text;
1159         }
1160
1161         public static function cleanPictureLinks($text)
1162         {
1163                 $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
1164                 return $return;
1165         }
1166
1167         private static function textHighlightCallback($match)
1168         {
1169                 // Fallback in case the language doesn't exist
1170                 $return = '[code]' . $match[2] . '[/code]';
1171
1172                 if (in_array(strtolower($match[1]),
1173                                 ['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
1174                                 'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh', 'bash'])
1175                 ) {
1176                         $return = text_highlight($match[2], strtolower($match[1]));
1177                 }
1178
1179                 return $return;
1180         }
1181
1182         /**
1183          * @brief Converts a BBCode message to HTML message
1184          *
1185          * BBcode 2 HTML was written by WAY2WEB.net
1186          * extended to work with Mistpark/Friendica - Mike Macgirvin
1187          *
1188          * Simple HTML values meaning:
1189          * - 0: Friendica display
1190          * - 1: Unused
1191          * - 2: Used for Facebook, Google+, Windows Phone push, Friendica API
1192          * - 3: Used before converting to Markdown in bb2diaspora.php
1193          * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
1194          * - 5: Unused
1195          * - 6: Used for Appnet
1196          * - 7: Used for dfrn, OStatus
1197          * - 8: Used for WP backlink text setting
1198          *
1199          * @param string $text
1200          * @param bool   $try_oembed
1201          * @param int    $simple_html
1202          * @param bool   $for_plaintext
1203          * @return string
1204          */
1205         public static function convert($text, $try_oembed = true, $simple_html = false, $for_plaintext = false)
1206         {
1207                 $a = self::getApp();
1208
1209                 /*
1210                  * preg_match_callback function to replace potential Oembed tags with Oembed content
1211                  *
1212                  * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
1213                  * $match[1] = $url
1214                  * $match[2] = $title or absent
1215                  */
1216                 $try_oembed_callback = function ($match)
1217                 {
1218                         $url = $match[1];
1219                         $title = defaults($match, 2, null);
1220
1221                         try {
1222                                 $return = OEmbed::getHTML($url, $title);
1223                         } catch (Exception $ex) {
1224                                 $return = $match[0];
1225                         }
1226
1227                         return $return;
1228                 };
1229
1230                 // Hide all [noparse] contained bbtags by spacefying them
1231                 // POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?
1232
1233                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::escapeNoparseCallback', $text);
1234                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::escapeNoparseCallback', $text);
1235                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::escapeNoparseCallback', $text);
1236
1237                 // Remove the abstract element. It is a non visible element.
1238                 $text = self::stripAbstract($text);
1239
1240                 // Move all spaces out of the tags
1241                 $text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $text);
1242                 $text = preg_replace("/(\s*)\[\/(\w*)\]/ism", '[/$2]$1', $text);
1243
1244                 // Extract the private images which use data urls since preg has issues with
1245                 // large data sizes. Stash them away while we do bbcode conversion, and then put them back
1246                 // in after we've done all the regex matching. We cannot use any preg functions to do this.
1247
1248                 $extracted = self::extractImagesFromItemBody($text);
1249                 $text = $extracted['body'];
1250                 $saved_image = $extracted['images'];
1251
1252                 // If we find any event code, turn it into an event.
1253                 // After we're finished processing the bbcode we'll
1254                 // replace all of the event code with a reformatted version.
1255
1256                 $ev = Event::fromBBCode($text);
1257
1258                 // Replace any html brackets with HTML Entities to prevent executing HTML or script
1259                 // Don't use strip_tags here because it breaks [url] search by replacing & with amp
1260
1261                 $text = str_replace("<", "&lt;", $text);
1262                 $text = str_replace(">", "&gt;", $text);
1263
1264                 // remove some newlines before the general conversion
1265                 $text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $text);
1266                 $text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $text);
1267
1268                 $text = preg_replace("/\n\[code\]/ism", "[code]", $text);
1269                 $text = preg_replace("/\[\/code\]\n/ism", "[/code]", $text);
1270
1271                 // when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
1272                 if (!$try_oembed) {
1273                         $text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text);
1274                 }
1275
1276                 // Check for [code] text here, before the linefeeds are messed with.
1277                 // The highlighter will unescape and re-escape the content.
1278                 if (strpos($text, '[code=') !== false) {
1279                         $text = preg_replace_callback("/\[code=(.*?)\](.*?)\[\/code\]/ism", 'self::textHighlightCallback', $text);
1280                 }
1281                 // Convert new line chars to html <br /> tags
1282
1283                 // nlbr seems to be hopelessly messed up
1284                 //      $Text = nl2br($Text);
1285
1286                 // We'll emulate it.
1287
1288                 $text = trim($text);
1289                 $text = str_replace("\r\n", "\n", $text);
1290
1291                 // removing multiplicated newlines
1292                 if (Config::get("system", "remove_multiplicated_lines")) {
1293                         $search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
1294                                         "\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
1295                         $replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
1296                                         "[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
1297                         do {
1298                                 $oldtext = $text;
1299                                 $text = str_replace($search, $replace, $text);
1300                         } while ($oldtext != $text);
1301                 }
1302
1303                 // Set up the parameters for a URL search string
1304                 $URLSearchString = "^\[\]";
1305                 // Set up the parameters for a MAIL search string
1306                 $MAILSearchString = $URLSearchString;
1307
1308                 // if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
1309                 if (!$for_plaintext) {
1310                         // Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
1311                         // Currently disabled, since the function is too greedy
1312                         // $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
1313                         $autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
1314                         $text = preg_replace($autolink_regex, '$1[url]$2[/url]', $text);
1315                         if ($simple_html == 7) {
1316                                 $text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForOStatusCallback', $text);
1317                                 $text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForOStatusCallback', $text);
1318                         }
1319                 } else {
1320                         $text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $text);
1321                         $text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::removePictureLinksCallback', $text);
1322                 }
1323
1324
1325                 // Handle attached links or videos
1326                 $text = self::convertAttachment($text, $simple_html, $try_oembed);
1327
1328                 $text = str_replace(["\r","\n"], ['<br />', '<br />'], $text);
1329
1330                 // Remove all hashtag addresses
1331                 if ((!$try_oembed || $simple_html) && !in_array($simple_html, [3, 7])) {
1332                         $text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $text);
1333                 } elseif ($simple_html == 3) {
1334                         // The ! is converted to @ since Diaspora only understands the @
1335                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1336                                 '@<a href="$2">$3</a>',
1337                                 $text);
1338                 } elseif ($simple_html == 7) {
1339                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1340                                 '$1<span class="vcard"><a href="$2" class="url" title="$3"><span class="fn nickname mention">$3</span></a></span>',
1341                                 $text);
1342                 } elseif (!$simple_html) {
1343                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1344                                 '$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
1345                                 $text);
1346                 }
1347
1348                 // Bookmarks in red - will be converted to bookmarks in friendica
1349                 $text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text);
1350                 $text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text);
1351                 $text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
1352                                         "[bookmark=$1]$2[/bookmark]", $text);
1353
1354                 if (in_array($simple_html, [2, 6, 7, 8, 9])) {
1355                         $text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "self::expandLinksCallback", $text);
1356                         //$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
1357                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$text);
1358                 }
1359
1360                 if ($simple_html == 5) {
1361                         $text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $text);
1362                 }
1363
1364                 // Perform URL Search
1365                 if ($try_oembed) {
1366                         $text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text);
1367                 }
1368
1369                 if ($simple_html == 5) {
1370                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $text);
1371                 } else {
1372                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text);
1373                 }
1374
1375                 // Handle Diaspora posts
1376                 $text = preg_replace_callback(
1377                         "&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
1378                         function ($match) {
1379                                 return "[url=" . System::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]";
1380                         }, $text
1381                 );
1382
1383                 // Server independent link to posts and comments
1384                 // See issue: https://github.com/diaspora/diaspora_federation/issues/75
1385                 $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
1386                 $text = preg_replace($expression, System::baseUrl()."/display/$1", $text);
1387
1388                 $text = preg_replace("/([#])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1389                                         '$1<a href="' . System::baseUrl() . '/search?tag=$3" class="tag" title="$3">$3</a>', $text);
1390
1391                 $text = preg_replace("/\[url\=([$URLSearchString]*)\]#(.*?)\[\/url\]/ism",
1392                                         '#<a href="' . System::baseUrl() . '/search?tag=$2" class="tag" title="$2">$2</a>', $text);
1393
1394                 $text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $text);
1395                 $text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1396                 //$Text = preg_replace("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
1397
1398                 // Red compatibility, though the link can't be authenticated on Friendica
1399                 $text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1400
1401
1402                 // we may need to restrict this further if it picks up too many strays
1403                 // link acct:user@host to a webfinger profile redirector
1404
1405                 $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="' . System::baseUrl() . '/acctlink?addr=$1@$2" target="extlink">acct:$1@$2</a>', $text);
1406
1407                 // Perform MAIL Search
1408                 $text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $text);
1409                 $text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $text);
1410
1411                 // leave open the posibility of [map=something]
1412                 // this is replaced in prepare_body() which has knowledge of the item location
1413
1414                 if (strpos($text, '[/map]') !== false) {
1415                         $text = preg_replace_callback(
1416                                 "/\[map\](.*?)\[\/map\]/ism",
1417                                 function ($match) use ($simple_html) {
1418                                         return str_replace($match[0], '<p class="map">' . Map::byLocation($match[1], $simple_html) . '</p>', $match[0]);
1419                                 },
1420                                 $text
1421                         );
1422                 }
1423                 if (strpos($text, '[map=') !== false) {
1424                         $text = preg_replace_callback(
1425                                 "/\[map=(.*?)\]/ism",
1426                                 function ($match) use ($simple_html) {
1427                                         return str_replace($match[0], '<p class="map">' . Map::byCoordinates(str_replace('/', ' ', $match[1]), $simple_html) . '</p>', $match[0]);
1428                                 },
1429                                 $text
1430                         );
1431                 }
1432                 if (strpos($text, '[map]') !== false) {
1433                         $text = preg_replace("/\[map\]/", '<p class="map"></p>', $text);
1434                 }
1435
1436                 // Check for headers
1437                 $text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $text);
1438                 $text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $text);
1439                 $text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $text);
1440                 $text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $text);
1441                 $text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $text);
1442                 $text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $text);
1443
1444                 // Check for paragraph
1445                 $text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $text);
1446
1447                 // Check for bold text
1448                 $text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $text);
1449
1450                 // Check for Italics text
1451                 $text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $text);
1452
1453                 // Check for Underline text
1454                 $text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $text);
1455
1456                 // Check for strike-through text
1457                 $text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<s>$1</s>', $text);
1458
1459                 // Check for over-line text
1460                 $text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $text);
1461
1462                 // Check for colored text
1463                 $text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $text);
1464
1465                 // Check for sized text
1466                 // [size=50] --> font-size: 50px (with the unit).
1467                 $text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $text);
1468                 $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $text);
1469
1470                 // Check for centered text
1471                 $text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $text);
1472
1473                 // Check for list text
1474                 $text = str_replace("[*]", "<li>", $text);
1475
1476                 // Check for style sheet commands
1477                 $text = preg_replace_callback(
1478                         "(\[style=(.*?)\](.*?)\[\/style\])ism",
1479                         function ($match) {
1480                                 return "<span style=\"" . HTML::sanitizeCSS($match[1]) . ";\">" . $match[2] . "</span>";
1481                         },
1482                         $text
1483                 );
1484
1485                 // Check for CSS classes
1486                 $text = preg_replace_callback(
1487                         "(\[class=(.*?)\](.*?)\[\/class\])ism",
1488                         function ($match) {
1489                                 return "<span class=\"" . HTML::sanitizeCSS($match[1]) . "\">" . $match[2] . "</span>";
1490                         },
1491                         $text
1492                 );
1493
1494                 // handle nested lists
1495                 $endlessloop = 0;
1496
1497                 while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) ||
1498                            ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) ||
1499                            ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) ||
1500                            ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) {
1501                         $text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1502                         $text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $text);
1503                         $text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1504                         $text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $text);
1505                         $text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $text);
1506                         $text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $text);
1507                         $text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $text);
1508                         $text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1509                         $text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1510                         $text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $text);
1511                 }
1512
1513                 $text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $text);
1514                 $text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $text);
1515                 $text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $text);
1516                 $text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $text);
1517
1518                 $text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $text);
1519                 $text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $text);
1520
1521                 $text = str_replace('[hr]', '<hr />', $text);
1522
1523                 // This is actually executed in prepare_body()
1524
1525                 $text = str_replace('[nosmile]', '', $text);
1526
1527                 // Check for font change text
1528                 $text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $text);
1529
1530                 // Declare the format for [code] layout
1531
1532                 $CodeLayout = '<code>$1</code>';
1533                 // Check for [code] text
1534                 $text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $text);
1535
1536                 // Declare the format for [spoiler] layout
1537                 $SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';
1538
1539                 // Check for [spoiler] text
1540                 // handle nested quotes
1541                 $endlessloop = 0;
1542                 while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
1543                         $text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", "$SpoilerLayout", $text);
1544                 }
1545
1546                 // Check for [spoiler=Author] text
1547
1548                 $t_wrote = L10n::t('$1 wrote:');
1549
1550                 // handle nested quotes
1551                 $endlessloop = 0;
1552                 while ((strpos($text, "[/spoiler]")!== false)  && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
1553                         $text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
1554                                                  "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
1555                                                  $text);
1556                 }
1557
1558                 // Declare the format for [quote] layout
1559                 $QuoteLayout = '<blockquote>$1</blockquote>';
1560
1561                 // Check for [quote] text
1562                 // handle nested quotes
1563                 $endlessloop = 0;
1564                 while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) {
1565                         $text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text);
1566                 }
1567
1568                 // Check for [quote=Author] text
1569
1570                 $t_wrote = L10n::t('$1 wrote:');
1571
1572                 // handle nested quotes
1573                 $endlessloop = 0;
1574                 while ((strpos($text, "[/quote]")!== false)  && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) {
1575                         $text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
1576                                                  "<p><strong class=".'"author"'.">" . $t_wrote . "</strong></p><blockquote>$2</blockquote>",
1577                                                  $text);
1578                 }
1579
1580
1581                 // [img=widthxheight]image source[/img]
1582                 $text = preg_replace_callback(
1583                         "/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism",
1584                         function ($matches) use ($simple_html) {
1585                                 if (strpos($matches[3], "data:image/") === 0) {
1586                                         return $matches[0];
1587                                 }
1588
1589                                 $matches[3] = self::proxyUrl($matches[3], $simple_html);
1590                                 return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
1591                         },
1592                         $text
1593                 );
1594
1595                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $text);
1596                 $text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $text);
1597
1598                 $text = preg_replace_callback("/\[img\=([$URLSearchString]*)\](.*?)\[\/img\]/ism",
1599                         function ($matches) use ($simple_html) {
1600                                 $matches[1] = self::proxyUrl($matches[1], $simple_html);
1601                                 $matches[2] = htmlspecialchars($matches[2], ENT_COMPAT);
1602                                 return '<img src="' . $matches[1] . '" alt="' . $matches[2] . '">';
1603                         },
1604                         $text);
1605
1606                 // Images
1607                 // [img]pathtoimage[/img]
1608                 $text = preg_replace_callback(
1609                         "/\[img\](.*?)\[\/img\]/ism",
1610                         function ($matches) use ($simple_html) {
1611                                 if (strpos($matches[1], "data:image/") === 0) {
1612                                         return $matches[0];
1613                                 }
1614
1615                                 $matches[1] = self::proxyUrl($matches[1], $simple_html);
1616                                 return "[img]" . $matches[1] . "[/img]";
1617                         },
1618                         $text
1619                 );
1620
1621                 $text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1622                 $text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1623
1624                 // Shared content
1625                 $text = preg_replace_callback("/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
1626                         function ($match) use ($simple_html) {
1627                                 return self::convertShare($match, $simple_html);
1628                         }, $text);
1629
1630                 $text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . L10n::t('Encrypted content') . '" /><br />', $text);
1631                 $text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $text);
1632                 //$Text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);
1633
1634                 // Try to Oembed
1635                 if ($try_oembed) {
1636                         $text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4).*?)\[\/video\]/ism", '<video src="$1" controls="controls" width="' . $a->videowidth . '" height="' . $a->videoheight . '" loop="true"><a href="$1">$1</a></video>', $text);
1637                         $text = preg_replace("/\[audio\](.*?\.(ogg|ogv|oga|ogm|webm|mp4|mp3).*?)\[\/audio\]/ism", '<audio src="$1" controls="controls"><a href="$1">$1</a></audio>', $text);
1638
1639                         $text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text);
1640                         $text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text);
1641                 } else {
1642                         $text = preg_replace("/\[video\](.*?)\[\/video\]/ism",
1643                                                 '<a href="$1" target="_blank">$1</a>', $text);
1644                         $text = preg_replace("/\[audio\](.*?)\[\/audio\]/ism",
1645                                                 '<a href="$1" target="_blank">$1</a>', $text);
1646                 }
1647
1648                 // html5 video and audio
1649
1650
1651                 if ($try_oembed) {
1652                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $text);
1653                 } else {
1654                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $text);
1655                 }
1656
1657                 // Youtube extensions
1658                 if ($try_oembed) {
1659                         $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1660                         $text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1661                         $text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1662                 }
1663
1664                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1665                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1666                 $text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1667
1668                 if ($try_oembed) {
1669                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://www.youtube.com/embed/$1" frameborder="0" ></iframe>', $text);
1670                 } else {
1671                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
1672                                                 '<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $text);
1673                 }
1674
1675                 if ($try_oembed) {
1676                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1677                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1678                 }
1679
1680                 $text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1681                 $text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1682
1683                 if ($try_oembed) {
1684                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://player.vimeo.com/video/$1" frameborder="0" ></iframe>', $text);
1685                 } else {
1686                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
1687                                                 '<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $text);
1688                 }
1689
1690                 // oembed tag
1691                 $text = OEmbed::BBCode2HTML($text);
1692
1693                 // Avoid triple linefeeds through oembed
1694                 $text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $text);
1695
1696                 // If we found an event earlier, strip out all the event code and replace with a reformatted version.
1697                 // Replace the event-start section with the entire formatted event. The other bbcode is stripped.
1698                 // Summary (e.g. title) is required, earlier revisions only required description (in addition to
1699                 // start which is always required). Allow desc with a missing summary for compatibility.
1700
1701                 if ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
1702                         $sub = Event::getHTML($ev, $simple_html);
1703
1704                         $text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
1705                         $text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
1706                         $text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text);
1707                         $text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text);
1708                         $text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text);
1709                         $text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $text);
1710                         $text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text);
1711                 }
1712
1713                 // Replace non graphical smilies for external posts
1714                 if ($simple_html) {
1715                         $text = Smilies::replace($text, false, true);
1716                 }
1717
1718                 // Replace inline code blocks
1719                 $text = preg_replace_callback("|(?!<br[^>]*>)<code>([^<]*)</code>(?!<br[^>]*>)|ism",
1720                         function ($match) use ($simple_html) {
1721                                 $return = '<key>' . $match[1] . '</key>';
1722                                 // Use <code> for Diaspora inline code blocks
1723                                 if ($simple_html === 3) {
1724                                         $return = '<code>' . $match[1] . '</code>';
1725                                 }
1726                                 return $return;
1727                         }
1728                 , $text);
1729
1730                 // Unhide all [noparse] contained bbtags unspacefying them
1731                 // and triming the [noparse] tag.
1732
1733                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::unescapeNoparseCallback', $text);
1734                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::unescapeNoparseCallback', $text);
1735                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::unescapeNoparseCallback', $text);
1736
1737                 /// @todo What is the meaning of these lines?
1738                 $text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $text);
1739                 $text = preg_replace('/\&\#039\;/', '\'', $text);
1740
1741                 // Currently deactivated, it made problems with " inside of alt texts.
1742                 //$text = preg_replace('/\&quot\;/', '"', $text);
1743
1744                 // fix any escaped ampersands that may have been converted into links
1745                 $text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
1746
1747                 // sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
1748                 $allowed_src_protocols = ['http', 'redir', 'cid'];
1749                 $text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
1750                                          '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $text);
1751
1752                 // sanitize href attributes (only whitelisted protocols URLs)
1753                 // default value for backward compatibility
1754                 $allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);
1755
1756                 // Always allowed protocol even if config isn't set or not including it
1757                 $allowed_link_protocols[] = 'http';
1758                 $allowed_link_protocols[] = 'redir/';
1759
1760                 $regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
1761                 $text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . L10n::t('Invalid link protocol') . '">', $text);
1762
1763                 if ($saved_image) {
1764                         $text = self::interpolateSavedImagesIntoItemBody($text, $saved_image);
1765                 }
1766
1767                 // Clean up the HTML by loading and saving the HTML with the DOM.
1768                 // Bad structured html can break a whole page.
1769                 // For performance reasons do it only with ativated item cache or at export.
1770                 if (!$try_oembed || (get_itemcachepath() != "")) {
1771                         $doc = new DOMDocument();
1772                         $doc->preserveWhiteSpace = false;
1773
1774                         $text = mb_convert_encoding($text, 'HTML-ENTITIES', "UTF-8");
1775
1776                         $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
1777                         $encoding = '<?xml encoding="UTF-8">';
1778                         @$doc->loadHTML($encoding.$doctype."<html><body>".$text."</body></html>");
1779                         $doc->encoding = 'UTF-8';
1780                         $text = $doc->saveHTML();
1781                         $text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $text);
1782
1783                         $text = str_replace('<br></li>', '</li>', $text);
1784
1785                         //$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
1786                 }
1787
1788                 // Clean up some useless linebreaks in lists
1789                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1790                 //$Text = str_replace('</ul><br />', '</ul>', $Text);
1791                 //$Text = str_replace('</li><br />', '</li>', $Text);
1792                 //$Text = str_replace('<br /><li>', '<li>', $Text);
1793                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1794
1795                 Addon::callHooks('bbcode', $text);
1796
1797                 return trim($text);
1798         }
1799
1800         /**
1801          * @brief Strips the "abstract" tag from the provided text
1802          *
1803          * @param string $text The text with BBCode
1804          * @return string The same text - but without "abstract" element
1805          */
1806         public static function stripAbstract($text)
1807         {
1808                 $text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", '', $text);
1809                 $text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", '', $text);
1810
1811                 return $text;
1812         }
1813
1814         /**
1815          * @brief Returns the value of the "abstract" element
1816          *
1817          * @param string $text The text that maybe contains the element
1818          * @param string $addon The addon for which the abstract is meant for
1819          * @return string The abstract
1820          */
1821         public static function getAbstract($text, $addon = "")
1822         {
1823                 $abstract = "";
1824                 $abstracts = [];
1825                 $addon = strtolower($addon);
1826
1827                 if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism", $text, $results, PREG_SET_ORDER)) {
1828                         foreach ($results AS $result) {
1829                                 $abstracts[strtolower($result[1])] = $result[2];
1830                         }
1831                 }
1832
1833                 if (isset($abstracts[$addon])) {
1834                         $abstract = $abstracts[$addon];
1835                 }
1836
1837                 if ($abstract == "" && preg_match("/\[abstract\](.*?)\[\/abstract\]/ism", $text, $result)) {
1838                         $abstract = $result[1];
1839                 }
1840
1841                 return $abstract;
1842         }
1843
1844         /**
1845          * @brief Callback function to replace a Friendica style mention in a mention for Diaspora
1846          *
1847          * @param array $match Matching values for the callback
1848          * @return string Replaced mention
1849          */
1850         private static function bbCodeMention2DiasporaCallback($match)
1851         {
1852                 $contact = Contact::getDetailsByURL($match[3]);
1853
1854                 if (empty($contact['addr'])) {
1855                         $contact = Probe::uri($match[3]);
1856                 }
1857
1858                 if (empty($contact['addr'])) {
1859                         return $match[0];
1860                 }
1861
1862                 $mention = '@{' . $match[2] . '; ' . $contact['addr'] . '}';
1863                 return $mention;
1864         }
1865
1866         /**
1867          * @brief Converts a BBCode text into Markdown
1868          *
1869          * This function converts a BBCode item body to be sent to Markdown-enabled
1870          * systems like Diaspora and Libertree
1871          *
1872          * @param string $text
1873          * @param bool   $for_diaspora Diaspora requires more changes than Libertree
1874          * @return string
1875          */
1876         public static function toMarkdown($text, $for_diaspora = true)
1877         {
1878                 $a = self::getApp();
1879
1880                 $original_text = $text;
1881
1882                 // Since Diaspora is creating a summary for links, this function removes them before posting
1883                 if ($for_diaspora) {
1884                         $text = self::removeShareInformation($text);
1885                 }
1886
1887                 /**
1888                  * Transform #tags, strip off the [url] and replace spaces with underscore
1889                  */
1890                 $url_search_string = "^\[\]";
1891                 $text = preg_replace_callback("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/i",
1892                         function ($matches) {
1893                                 return '#' . str_replace(' ', '_', $matches[2]);
1894                         },
1895                         $text
1896                 );
1897
1898                 // Converting images with size parameters to simple images. Markdown doesn't know it.
1899                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text);
1900
1901                 // Extracting multi-line code blocks before the whitespace processing/code highlighter in self::convert()
1902                 $codeblocks = [];
1903
1904                 $text = preg_replace_callback("#\[code(?:=([^\]]*))?\](.*?)\[\/code\]#is",
1905                         function ($matches) use (&$codeblocks) {
1906                                 $return = $matches[0];
1907                                 if (strpos($matches[2], "\n") !== false) {
1908                                         $return = '#codeblock-' . count($codeblocks) . '#';
1909
1910                                         $prefix = '````' . $matches[1] . PHP_EOL;
1911                                         $codeblocks[] = $prefix . trim($matches[2]) . PHP_EOL . '````';
1912                                 }
1913                                 return $return;
1914                         },
1915                         $text
1916                 );
1917
1918                 // Convert it to HTML - don't try oembed
1919                 if ($for_diaspora) {
1920                         $text = self::convert($text, false, 3);
1921
1922                         // Add all tags that maybe were removed
1923                         if (preg_match_all("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/ism", $original_text, $tags)) {
1924                                 $tagline = "";
1925                                 foreach ($tags[2] as $tag) {
1926                                         $tag = html_entity_decode($tag, ENT_QUOTES, 'UTF-8');
1927                                         if (!strpos(html_entity_decode($text, ENT_QUOTES, 'UTF-8'), '#' . $tag)) {
1928                                                 $tagline .= '#' . $tag . ' ';
1929                                         }
1930                                 }
1931                                 $text = $text . " " . $tagline;
1932                         }
1933                 } else {
1934                         $text = self::convert($text, false, 4);
1935                 }
1936
1937                 // mask some special HTML chars from conversation to markdown
1938                 $text = str_replace(['&lt;', '&gt;', '&amp;'], ['&_lt_;', '&_gt_;', '&_amp_;'], $text);
1939
1940                 // If a link is followed by a quote then there should be a newline before it
1941                 // Maybe we should make this newline at every time before a quote.
1942                 $text = str_replace(["</a><blockquote>"], ["</a><br><blockquote>"], $text);
1943
1944                 $stamp1 = microtime(true);
1945
1946                 // Now convert HTML to Markdown
1947                 $converter = new HtmlConverter();
1948                 $text = $converter->convert($text);
1949
1950                 // unmask the special chars back to HTML
1951                 $text = str_replace(['&\_lt\_;', '&\_gt\_;', '&\_amp\_;'], ['&lt;', '&gt;', '&amp;'], $text);
1952
1953                 $a->save_timestamp($stamp1, "parser");
1954
1955                 // Libertree has a problem with escaped hashtags.
1956                 $text = str_replace(['\#'], ['#'], $text);
1957
1958                 // Remove any leading or trailing whitespace, as this will mess up
1959                 // the Diaspora signature verification and cause the item to disappear
1960                 $text = trim($text);
1961
1962                 if ($for_diaspora) {
1963                         $url_search_string = "^\[\]";
1964                         $text = preg_replace_callback(
1965                                 "/([@]\[(.*?)\])\(([$url_search_string]*?)\)/ism",
1966                                 ['self', 'bbCodeMention2DiasporaCallback'],
1967                                 $text
1968                         );
1969                 }
1970
1971                 // Restore code blocks
1972                 $text = preg_replace_callback('/#codeblock-([0-9]+)#/iU',
1973                         function ($matches) use ($codeblocks) {
1974                                 $return = '';
1975                                 if (isset($codeblocks[intval($matches[1])])) {
1976                                         $return = $codeblocks[$matches[1]];
1977                                 }
1978                                 return $return;
1979                         },
1980                         $text
1981                 );
1982
1983                 Addon::callHooks('bb2diaspora', $text);
1984
1985                 return $text;
1986         }
1987 }