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\Network\Probe;
  24 use Friendica\Object\Image;
  25 use Friendica\Util\Map;
  26 use Friendica\Util\Network;
  27 use Friendica\Util\ParseUrl;
  28 use League\HTMLToMarkdown\HtmlConverter;
  29
  30 require_once "include/event.php";
  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 (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) {
  80                                                 $post["image"] = $matches[1];
  81                                         } else {
  82                                                 $post["preview"] = $matches[1];
  83                                         }
  84                                 }
  85
  86                                 if (preg_match("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) {
  87                                         $post["url"] = $matches[1];
  88                                         $post["title"] = $matches[2];
  89                                 }
  90                                 if (($post["url"] == "") && (in_array($post["type"], ["link", "video"]))
  91                                         && preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
  92                                         $post["url"] = $matches[1];
  93                                 }
  94
  95                                 // Search for description
  96                                 if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) {
  97                                         $post["description"] = $matches[1];
  98                                 }
  99                         }
 100                 }
 101                 return $post;
 102         }
 103
 104         /**
 105          * @brief Fetches attachment data that were generated with the "attachment" element
 106          *
 107          * @param string $body Message body
 108          * @return array
 109          * 'type' -> Message type ("link", "video", "photo")
 110          * 'text' -> Text before the shared message
 111          * 'after' -> Text after the shared message
 112          * 'image' -> Preview image of the message
 113          * 'url' -> Url to the attached message
 114          * 'title' -> Title of the attachment
 115          * 'description' -> Description of the attachment
 116          */
 117         public static function getAttachmentData($body)
 118         {
 119                 $data = [];
 120
 121                 if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
 122                         return self::getOldAttachmentData($body);
 123                 }
 124
 125                 $attributes = $match[2];
 126
 127                 $data["text"] = trim($match[1]);
 128
 129                 $type = "";
 130                 preg_match("/type='(.*?)'/ism", $attributes, $matches);
 131                 if (x($matches, 1)) {
 132                         $type = strtolower($matches[1]);
 133                 }
 134
 135                 preg_match('/type="(.*?)"/ism', $attributes, $matches);
 136                 if (x($matches, 1)) {
 137                         $type = strtolower($matches[1]);
 138                 }
 139
 140                 if ($type == "") {
 141                         return [];
 142                 }
 143
 144                 if (!in_array($type, ["link", "audio", "photo", "video"])) {
 145                         return [];
 146                 }
 147
 148                 if ($type != "") {
 149                         $data["type"] = $type;
 150                 }
 151
 152                 $url = "";
 153                 preg_match("/url='(.*?)'/ism", $attributes, $matches);
 154                 if (x($matches, 1)) {
 155                         $url = $matches[1];
 156                 }
 157
 158                 preg_match('/url="(.*?)"/ism', $attributes, $matches);
 159                 if (x($matches, 1)) {
 160                         $url = $matches[1];
 161                 }
 162
 163                 if ($url != "") {
 164                         $data["url"] = html_entity_decode($url, ENT_QUOTES, 'UTF-8');
 165                 }
 166
 167                 $title = "";
 168                 preg_match("/title='(.*?)'/ism", $attributes, $matches);
 169                 if (x($matches, 1)) {
 170                         $title = $matches[1];
 171                 }
 172
 173                 preg_match('/title="(.*?)"/ism', $attributes, $matches);
 174                 if (x($matches, 1)) {
 175                         $title = $matches[1];
 176                 }
 177
 178                 if ($title != "") {
 179                         $title = self::convert(html_entity_decode($title, ENT_QUOTES, 'UTF-8'), false, true);
 180                         $title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
 181                         $title = str_replace(["[", "]"], ["&#91;", "&#93;"], $title);
 182                         $data["title"] = $title;
 183                 }
 184
 185                 $image = "";
 186                 preg_match("/image='(.*?)'/ism", $attributes, $matches);
 187                 if (x($matches, 1)) {
 188                         $image = $matches[1];
 189                 }
 190
 191                 preg_match('/image="(.*?)"/ism', $attributes, $matches);
 192                 if (x($matches, 1)) {
 193                         $image = $matches[1];
 194                 }
 195
 196                 if ($image != "") {
 197                         $data["image"] = html_entity_decode($image, ENT_QUOTES, 'UTF-8');
 198                 }
 199
 200                 $preview = "";
 201                 preg_match("/preview='(.*?)'/ism", $attributes, $matches);
 202                 if (x($matches, 1)) {
 203                         $preview = $matches[1];
 204                 }
 205
 206                 preg_match('/preview="(.*?)"/ism', $attributes, $matches);
 207                 if (x($matches, 1)) {
 208                         $preview = $matches[1];
 209                 }
 210
 211                 if ($preview != "") {
 212                         $data["preview"] = html_entity_decode($preview, ENT_QUOTES, 'UTF-8');
 213                 }
 214
 215                 $data["description"] = trim($match[3]);
 216
 217                 $data["after"] = trim($match[4]);
 218
 219                 return $data;
 220         }
 221
 222         public static function getAttachedData($body, $item = [])
 223         {
 224                 /*
 225                 - text:
 226                 - type: link, video, photo
 227                 - title:
 228                 - url:
 229                 - image:
 230                 - description:
 231                 - (thumbnail)
 232                 */
 233
 234                 $has_title = !empty($item['title']);
 235                 $plink = (!empty($item['plink']) ? $item['plink'] : '');
 236                 $post = self::getAttachmentData($body);
 237
 238                 // if nothing is found, it maybe having an image.
 239                 if (!isset($post["type"])) {
 240                         // Simplify image codes
 241                         $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 242
 243                         $URLSearchString = "^\[\]";
 244                         if (preg_match_all("(\[url=([$URLSearchString]*)\]\s*\[img\]([$URLSearchString]*)\[\/img\]\s*\[\/url\])ism", $body, $pictures, PREG_SET_ORDER)) {
 245                                 if ((count($pictures) == 1) && !$has_title) {
 246                                         // Checking, if the link goes to a picture
 247                                         $data = ParseUrl::getSiteinfoCached($pictures[0][1], true);
 248
 249                                         // Workaround:
 250                                         // Sometimes photo posts to the own album are not detected at the start.
 251                                         // So we seem to cannot use the cache for these cases. That's strange.
 252                                         if (($data["type"] != "photo") && strstr($pictures[0][1], "/photos/")) {
 253                                                 $data = ParseUrl::getSiteinfo($pictures[0][1], true);
 254                                         }
 255
 256                                         if ($data["type"] == "photo") {
 257                                                 $post["type"] = "photo";
 258                                                 if (isset($data["images"][0])) {
 259                                                         $post["image"] = $data["images"][0]["src"];
 260                                                         $post["url"] = $data["url"];
 261                                                 } else {
 262                                                         $post["image"] = $data["url"];
 263                                                 }
 264
 265                                                 $post["preview"] = $pictures[0][2];
 266                                                 $post["text"] = str_replace($pictures[0][0], "", $body);
 267                                         } else {
 268                                                 $imgdata = Image::getInfoFromURL($pictures[0][1]);
 269                                                 if (substr($imgdata["mime"], 0, 6) == "image/") {
 270                                                         $post["type"] = "photo";
 271                                                         $post["image"] = $pictures[0][1];
 272                                                         $post["preview"] = $pictures[0][2];
 273                                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 274                                                 }
 275                                         }
 276                                 } elseif (count($pictures) > 0) {
 277                                         $post["type"] = "link";
 278                                         $post["url"] = $plink;
 279                                         $post["image"] = $pictures[0][2];
 280                                         $post["text"] = $body;
 281                                 }
 282                         } elseif (preg_match_all("(\[img\]([$URLSearchString]*)\[\/img\])ism", $body, $pictures, PREG_SET_ORDER)) {
 283                                 if ((count($pictures) == 1) && !$has_title) {
 284                                         $post["type"] = "photo";
 285                                         $post["image"] = $pictures[0][1];
 286                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 287                                 } elseif (count($pictures) > 0) {
 288                                         $post["type"] = "link";
 289                                         $post["url"] = $plink;
 290                                         $post["image"] = $pictures[0][1];
 291                                         $post["text"] = $body;
 292                                 }
 293                         }
 294
 295                         // Test for the external links
 296                         preg_match_all("(\[url\]([$URLSearchString]*)\[\/url\])ism", $body, $links1, PREG_SET_ORDER);
 297                         preg_match_all("(\[url\=([$URLSearchString]*)\].*?\[\/url\])ism", $body, $links2, PREG_SET_ORDER);
 298
 299                         $links = array_merge($links1, $links2);
 300
 301                         // If there is only a single one, then use it.
 302                         // This should cover link posts via API.
 303                         if ((count($links) == 1) && !isset($post["preview"]) && !$has_title) {
 304                                 $post["type"] = "link";
 305                                 $post["text"] = trim($body);
 306                                 $post["url"] = $links[0][1];
 307                         }
 308
 309                         // Now count the number of external media links
 310                         preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $body, $links1, PREG_SET_ORDER);
 311                         preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $body, $links2, PREG_SET_ORDER);
 312                         preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $body, $links3, PREG_SET_ORDER);
 313                         preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $body, $links4, PREG_SET_ORDER);
 314
 315                         // Add them to the other external links
 316                         $links = array_merge($links, $links1, $links2, $links3, $links4);
 317
 318                         // Are there more than one?
 319                         if (count($links) > 1) {
 320                                 // The post will be the type "text", which means a blog post
 321                                 unset($post["type"]);
 322                                 $post["url"] = $plink;
 323                         }
 324
 325                         if (!isset($post["type"])) {
 326                                 $post["type"] = "text";
 327                                 $post["text"] = trim($body);
 328                         }
 329                 } elseif (isset($post["url"]) && ($post["type"] == "video")) {
 330                         $data = ParseUrl::getSiteinfoCached($post["url"], true);
 331
 332                         if (isset($data["images"][0])) {
 333                                 $post["image"] = $data["images"][0]["src"];
 334                         }
 335                 }
 336
 337                 return $post;
 338         }
 339
 340         /**
 341          * @brief Convert a message into plaintext for connectors to other networks
 342          *
 343          * @param array $b The message array that is about to be posted
 344          * @param int $limit The maximum number of characters when posting to that network
 345          * @param bool $includedlinks Has an attached link to be included into the message?
 346          * @param int $htmlmode This triggers the behaviour of the bbcode conversion
 347          * @param string $target_network Name of the network where the post should go to.
 348          *
 349          * @return string The converted message
 350          */
 351         public static function toPlaintext($b, $limit = 0, $includedlinks = false, $htmlmode = 2, $target_network = "")
 352         {
 353                 // Remove the hash tags
 354                 $URLSearchString = "^\[\]";
 355                 $body = preg_replace("/([#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $b["body"]);
 356
 357                 // Add an URL element if the text contains a raw link
 358                 $body = preg_replace("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url]$2[/url]', $body);
 359
 360                 // Remove the abstract
 361                 $body = self::stripAbstract($body);
 362
 363                 // At first look at data that is attached via "type-..." stuff
 364                 // This will hopefully replaced with a dedicated bbcode later
 365                 //$post = self::getAttachedData($b["body"]);
 366                 $post = self::getAttachedData($body, $b);
 367
 368                 if (($b["title"] != "") && ($post["text"] != "")) {
 369                         $post["text"] = trim($b["title"]."\n\n".$post["text"]);
 370                 } elseif ($b["title"] != "") {
 371                         $post["text"] = trim($b["title"]);
 372                 }
 373
 374                 $abstract = "";
 375
 376                 // Fetch the abstract from the given target network
 377                 if ($target_network != "") {
 378                         $default_abstract = self::getAbstract($b["body"]);
 379                         $abstract = self::getAbstract($b["body"], $target_network);
 380
 381                         // If we post to a network with no limit we only fetch
 382                         // an abstract exactly for this network
 383                         if (($limit == 0) && ($abstract == $default_abstract)) {
 384                                 $abstract = "";
 385                         }
 386                 } else {// Try to guess the correct target network
 387                         switch ($htmlmode) {
 388                                 case 8:
 389                                         $abstract = self::getAbstract($b["body"], NETWORK_TWITTER);
 390                                         break;
 391                                 case 7:
 392                                         $abstract = self::getAbstract($b["body"], NETWORK_STATUSNET);
 393                                         break;
 394                                 case 6:
 395                                         $abstract = self::getAbstract($b["body"], NETWORK_APPNET);
 396                                         break;
 397                                 default: // We don't know the exact target.
 398                                         // We fetch an abstract since there is a posting limit.
 399                                         if ($limit > 0) {
 400                                                 $abstract = self::getAbstract($b["body"]);
 401                                         }
 402                         }
 403                 }
 404
 405                 if ($abstract != "") {
 406                         $post["text"] = $abstract;
 407
 408                         if ($post["type"] == "text") {
 409                                 $post["type"] = "link";
 410                                 $post["url"] = $b["plink"];
 411                         }
 412                 }
 413
 414                 $html = self::convert($post["text"].$post["after"], false, $htmlmode);
 415                 $msg = HTML::toPlaintext($html, 0, true);
 416                 $msg = trim(html_entity_decode($msg, ENT_QUOTES, 'UTF-8'));
 417
 418                 $link = "";
 419                 if ($includedlinks) {
 420                         if ($post["type"] == "link") {
 421                                 $link = $post["url"];
 422                         } elseif ($post["type"] == "text") {
 423                                 $link = $post["url"];
 424                         } elseif ($post["type"] == "video") {
 425                                 $link = $post["url"];
 426                         } elseif ($post["type"] == "photo") {
 427                                 $link = $post["image"];
 428                         }
 429
 430                         if (($msg == "") && isset($post["title"])) {
 431                                 $msg = trim($post["title"]);
 432                         }
 433
 434                         if (($msg == "") && isset($post["description"])) {
 435                                 $msg = trim($post["description"]);
 436                         }
 437
 438                         // If the link is already contained in the post, then it neeedn't to be added again
 439                         // But: if the link is beyond the limit, then it has to be added.
 440                         if (($link != "") && strstr($msg, $link)) {
 441                                 $pos = strpos($msg, $link);
 442
 443                                 // Will the text be shortened in the link?
 444                                 // Or is the link the last item in the post?
 445                                 if (($limit > 0) && ($pos < $limit) && (($pos + 23 > $limit) || ($pos + strlen($link) == strlen($msg)))) {
 446                                         $msg = trim(str_replace($link, "", $msg));
 447                                 } elseif (($limit == 0) || ($pos < $limit)) {
 448                                         // The limit has to be increased since it will be shortened - but not now
 449                                         // Only do it with Twitter (htmlmode = 8)
 450                                         if (($limit > 0) && (strlen($link) > 23) && ($htmlmode == 8)) {
 451                                                 $limit = $limit - 23 + strlen($link);
 452                                         }
 453
 454                                         $link = "";
 455
 456                                         if ($post["type"] == "text") {
 457                                                 unset($post["url"]);
 458                                         }
 459                                 }
 460                         }
 461                 }
 462
 463                 if ($limit > 0) {
 464                         // Reduce multiple spaces
 465                         // When posted to a network with limited space, we try to gain space where possible
 466                         while (strpos($msg, "  ") !== false) {
 467                                 $msg = str_replace("  ", " ", $msg);
 468                         }
 469
 470                         // Twitter is using its own limiter, so we always assume that shortened links will have this length
 471                         if (iconv_strlen($link, "UTF-8") > 0) {
 472                                 $limit = $limit - 23;
 473                         }
 474
 475                         if (iconv_strlen($msg, "UTF-8") > $limit) {
 476                                 if (($post["type"] == "text") && isset($post["url"])) {
 477                                         $post["url"] = $b["plink"];
 478                                 } elseif (!isset($post["url"])) {
 479                                         $limit = $limit - 23;
 480                                         $post["url"] = $b["plink"];
 481                                 // Which purpose has this line? It is now uncommented, but left as a reminder
 482                                 //} elseif (strpos($b["body"], "[share") !== false) {
 483                                 //      $post["url"] = $b["plink"];
 484                                 } elseif (PConfig::get($b["uid"], "system", "no_intelligent_shortening")) {
 485                                         $post["url"] = $b["plink"];
 486                                 }
 487                                 $msg = Plaintext::shorten($msg, $limit);
 488                         }
 489                 }
 490
 491                 $post["text"] = trim($msg);
 492
 493                 return($post);
 494         }
 495
 496         public static function scaleExternalImages($srctext, $include_link = true, $scale_replace = false)
 497         {
 498                 // Suppress "view full size"
 499                 if (intval(Config::get('system', 'no_view_full_size'))) {
 500                         $include_link = false;
 501                 }
 502
 503                 // Picture addresses can contain special characters
 504                 $s = htmlspecialchars_decode($srctext);
 505
 506                 $matches = null;
 507                 $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism', $s, $matches, PREG_SET_ORDER);
 508                 if ($c) {
 509                         foreach ($matches as $mtch) {
 510                                 logger('scale_external_image: ' . $mtch[1]);
 511
 512                                 $hostname = str_replace('www.', '', substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3));
 513                                 if (stristr($mtch[1], $hostname)) {
 514                                         continue;
 515                                 }
 516
 517                                 // $scale_replace, if passed, is an array of two elements. The
 518                                 // first is the name of the full-size image. The second is the
 519                                 // name of a remote, scaled-down version of the full size image.
 520                                 // This allows Friendica to display the smaller remote image if
 521                                 // one exists, while still linking to the full-size image
 522                                 if ($scale_replace) {
 523                                         $scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
 524                                 } else {
 525                                         $scaled = $mtch[1];
 526                                 }
 527                                 $i = Network::fetchUrl($scaled);
 528                                 if (!$i) {
 529                                         return $srctext;
 530                                 }
 531
 532                                 // guess mimetype from headers or filename
 533                                 $type = Image::guessType($mtch[1], true);
 534
 535                                 if ($i) {
 536                                         $Image = new Image($i, $type);
 537                                         if ($Image->isValid()) {
 538                                                 $orig_width = $Image->getWidth();
 539                                                 $orig_height = $Image->getHeight();
 540
 541                                                 if ($orig_width > 640 || $orig_height > 640) {
 542                                                         $Image->scaleDown(640);
 543                                                         $new_width = $Image->getWidth();
 544                                                         $new_height = $Image->getHeight();
 545                                                         logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
 546                                                         $s = str_replace(
 547                                                                 $mtch[0],
 548                                                                 '[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
 549                                                                 . "\n" . (($include_link)
 550                                                                         ? '[url=' . $mtch[1] . ']' . L10n::t('view full size') . '[/url]' . "\n"
 551                                                                         : ''),
 552                                                                 $s
 553                                                         );
 554                                                         logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
 555                                                 }
 556                                         }
 557                                 }
 558                         }
 559                 }
 560
 561                 // replace the special char encoding
 562                 $s = htmlspecialchars($s, ENT_NOQUOTES, 'UTF-8');
 563                 return $s;
 564         }
 565
 566         /**
 567          * The purpose of this function is to apply system message length limits to
 568          * imported messages without including any embedded photos in the length
 569          *
 570          * @brief Truncates imported message body string length to max_import_size
 571          * @param string $body
 572          * @return string
 573          */
 574         public static function limitBodySize($body)
 575         {
 576                 $maxlen = get_max_import_size();
 577
 578                 // If the length of the body, including the embedded images, is smaller
 579                 // than the maximum, then don't waste time looking for the images
 580                 if ($maxlen && (strlen($body) > $maxlen)) {
 581
 582                         logger('the total body length exceeds the limit', LOGGER_DEBUG);
 583
 584                         $orig_body = $body;
 585                         $new_body = '';
 586                         $textlen = 0;
 587
 588                         $img_start = strpos($orig_body, '[img');
 589                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 590                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 591                         while (($img_st_close !== false) && ($img_end !== false)) {
 592
 593                                 $img_st_close++; // make it point to AFTER the closing bracket
 594                                 $img_end += $img_start;
 595                                 $img_end += strlen('[/img]');
 596
 597                                 if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 598                                         // This is an embedded image
 599
 600                                         if (($textlen + $img_start) > $maxlen) {
 601                                                 if ($textlen < $maxlen) {
 602                                                         logger('the limit happens before an embedded image', LOGGER_DEBUG);
 603                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 604                                                         $textlen = $maxlen;
 605                                                 }
 606                                         } else {
 607                                                 $new_body = $new_body . substr($orig_body, 0, $img_start);
 608                                                 $textlen += $img_start;
 609                                         }
 610
 611                                         $new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start);
 612                                 } else {
 613
 614                                         if (($textlen + $img_end) > $maxlen) {
 615                                                 if ($textlen < $maxlen) {
 616                                                         logger('the limit happens before the end of a non-embedded image', LOGGER_DEBUG);
 617                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 618                                                         $textlen = $maxlen;
 619                                                 }
 620                                         } else {
 621                                                 $new_body = $new_body . substr($orig_body, 0, $img_end);
 622                                                 $textlen += $img_end;
 623                                         }
 624                                 }
 625                                 $orig_body = substr($orig_body, $img_end);
 626
 627                                 if ($orig_body === false) {
 628                                         // in case the body ends on a closing image tag
 629                                         $orig_body = '';
 630                                 }
 631
 632                                 $img_start = strpos($orig_body, '[img');
 633                                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 634                                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 635                         }
 636
 637                         if (($textlen + strlen($orig_body)) > $maxlen) {
 638                                 if ($textlen < $maxlen) {
 639                                         logger('the limit happens after the end of the last image', LOGGER_DEBUG);
 640                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 641                                 }
 642                         } else {
 643                                 logger('the text size with embedded images extracted did not violate the limit', LOGGER_DEBUG);
 644                                 $new_body = $new_body . $orig_body;
 645                         }
 646
 647                         return $new_body;
 648                 } else {
 649                         return $body;
 650                 }
 651         }
 652
 653         /**
 654          * Processes [attachment] tags
 655          *
 656          * Note: Can produce a [bookmark] tag in the returned string
 657          *
 658          * @brief Processes [attachment] tags
 659          * @param string $return
 660          * @param bool|int $simplehtml
 661          * @param bool $tryoembed
 662          * @return string
 663          */
 664         private static function convertAttachment($return, $simplehtml = false, $tryoembed = true)
 665         {
 666                 $data = self::getAttachmentData($return);
 667                 if (!$data) {
 668                         return $return;
 669                 }
 670
 671                 if (isset($data["title"])) {
 672                         $data["title"] = strip_tags($data["title"]);
 673                         $data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
 674                 }
 675
 676                 if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && ($data["image"] != "")) {
 677                         $data["preview"] = $data["image"];
 678                         $data["image"] = "";
 679                 }
 680
 681                 $return = '';
 682                 if ($simplehtml == 7) {
 683                         $return = self::convertUrlForMastodon($data["url"]);
 684                 } elseif (($simplehtml != 4) && ($simplehtml != 0)) {
 685                         $return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
 686                 } else {
 687                         try {
 688                                 if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
 689                                         $return = OEmbed::getHTML($data['url'], $data['title']);
 690                                 } else {
 691                                         throw new Exception('OEmbed is disabled for this attachment.');
 692                                 }
 693                         } catch (Exception $e) {
 694                                 if ($simplehtml != 4) {
 695                                         $return = sprintf('<div class="type-%s">', $data["type"]);
 696                                 }
 697
 698                                 if ($data["image"] != "") {
 699                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], proxy_url($data["image"]), $data["title"]);
 700                                 } elseif ($data["preview"] != "") {
 701                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], proxy_url($data["preview"]), $data["title"]);
 702                                 }
 703
 704                                 if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
 705                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], proxy_url($data["image"]), $data["title"]);
 706                                 } else {
 707                                         $return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
 708                                 }
 709
 710                                 if ($data["description"] != "" && $data["description"] != $data["title"]) {
 711                                         $return .= sprintf('<blockquote>%s</blockquote>', trim(self::convert($data["description"])));
 712                                 }
 713
 714                                 if ($data["type"] == "link") {
 715                                         $return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
 716                                 }
 717
 718                                 if ($simplehtml != 4) {
 719                                         $return .= '</div>';
 720                                 }
 721                         }
 722                 }
 723
 724                 return trim($data["text"] . ' ' . $return . ' ' . $data["after"]);
 725         }
 726
 727         public static function removeShareInformation($Text, $plaintext = false, $nolink = false)
 728         {
 729                 $data = self::getAttachmentData($Text);
 730
 731                 if (!$data) {
 732                         return $Text;
 733                 } elseif ($nolink) {
 734                         return $data["text"] . $data["after"];
 735                 }
 736
 737                 $title = htmlentities($data["title"], ENT_QUOTES, 'UTF-8', false);
 738                 $text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
 739                 if ($plaintext || (($title != "") && strstr($text, $title))) {
 740                         $data["title"] = $data["url"];
 741                 } elseif (($text != "") && strstr($title, $text)) {
 742                         $data["text"] = $data["title"];
 743                         $data["title"] = $data["url"];
 744                 }
 745
 746                 if (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
 747                         return $data["title"] . $data["after"];
 748                 }
 749
 750                 // If the link already is included in the post, don't add it again
 751                 if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
 752                         return $data["text"] . $data["after"];
 753                 }
 754
 755                 $text = $data["text"];
 756
 757                 if (($data["url"] != "") && ($data["title"] != "")) {
 758                         $text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
 759                 } elseif (($data["url"] != "")) {
 760                         $text .= "\n" . $data["url"];
 761                 }
 762
 763                 return $text . "\n" . $data["after"];
 764         }
 765
 766         /**
 767          * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 768          *
 769          * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 770          * @param array $match Array with the matching values
 771          * @return string reformatted link including HTML codes
 772          */
 773         private static function convertUrlForMastodonCallback($match)
 774         {
 775                 $url = $match[1];
 776
 777                 if (isset($match[2]) && ($match[1] != $match[2])) {
 778                         return $match[0];
 779                 }
 780
 781                 $parts = parse_url($url);
 782                 if (!isset($parts['scheme'])) {
 783                         return $match[0];
 784                 }
 785
 786                 return self::convertUrlForMastodon($url);
 787         }
 788
 789         /**
 790          * @brief Converts [url] BBCodes in a format that looks fine on Mastodon and GNU Social.
 791          * @param string $url URL that is about to be reformatted
 792          * @return string reformatted link including HTML codes
 793          */
 794         private static function convertUrlForMastodon($url)
 795         {
 796                 $parts = parse_url($url);
 797                 $scheme = $parts['scheme'] . '://';
 798                 $styled_url = str_replace($scheme, '', $url);
 799
 800                 $html = '<a href="%s" class="attachment" rel="nofollow noopener" target="_blank">' .
 801                         '<span class="invisible">%s</span>';
 802
 803                 if (strlen($styled_url) > 30) {
 804                         $html .= '<span class="ellipsis">%s</span>' .
 805                                 '<span class="invisible">%s</span></a>';
 806
 807                         $ellipsis = substr($styled_url, 0, 30);
 808                         $rest = substr($styled_url, 30);
 809                         return sprintf($html, $url, $scheme, $ellipsis, $rest);
 810                 } else {
 811                         $html .= '%s</a>';
 812                         return sprintf($html, $url, $scheme, $styled_url);
 813                 }
 814         }
 815
 816         /*
 817          * [noparse][i]italic[/i][/noparse] turns into
 818          * [noparse][ i ]italic[ /i ][/noparse],
 819          * to hide them from parser.
 820          */
 821         private static function escapeNoparseCallback($match)
 822         {
 823                 $whole_match = $match[0];
 824                 $captured = $match[1];
 825                 $spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
 826                 $new_str = str_replace($captured, $spacefied, $whole_match);
 827                 return $new_str;
 828         }
 829
 830         /*
 831          * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
 832          * now turns back and the [noparse] tags are trimed
 833          * returning [i]italic[/i]
 834          */
 835         private static function unescapeNoparseCallback($match)
 836         {
 837                 $captured = $match[1];
 838                 $unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
 839                 return $unspacefied;
 840         }
 841
 842         /**
 843          * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first
 844          * occurrences
 845          *
 846          * @param string $text        Text to search
 847          * @param string $name        Tag name
 848          * @param int    $occurrences Number of first occurrences to skip
 849          * @return boolean|array
 850          */
 851         public static function getTagPosition($text, $name, $occurrences = 0)
 852         {
 853                 if ($occurrences < 0) {
 854                         $occurrences = 0;
 855                 }
 856
 857                 $start_open = -1;
 858                 for ($i = 0; $i <= $occurrences; $i++) {
 859                         if ($start_open !== false) {
 860                                 $start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags
 861                         }
 862                 }
 863
 864                 if ($start_open === false) {
 865                         return false;
 866                 }
 867
 868                 $start_equal = strpos($text, '=', $start_open);
 869                 $start_close = strpos($text, ']', $start_open);
 870
 871                 if ($start_close === false) {
 872                         return false;
 873                 }
 874
 875                 $start_close++;
 876
 877                 $end_open = strpos($text, '[/' . $name . ']', $start_close);
 878
 879                 if ($end_open === false) {
 880                         return false;
 881                 }
 882
 883                 $res = [
 884                         'start' => [
 885                                 'open' => $start_open,
 886                                 'close' => $start_close
 887                         ],
 888                         'end' => [
 889                                 'open' => $end_open,
 890                                 'close' => $end_open + strlen('[/' . $name . ']')
 891                         ],
 892                 ];
 893
 894                 if ($start_equal !== false) {
 895                         $res['start']['equal'] = $start_equal + 1;
 896                 }
 897
 898                 return $res;
 899         }
 900
 901         /**
 902          * Performs a preg_replace within the boundaries of all named BBCode tags in a text
 903          *
 904          * @param type $pattern Preg pattern string
 905          * @param type $replace Preg replace string
 906          * @param type $name    BBCode tag name
 907          * @param type $text    Text to search
 908          * @return string
 909          */
 910         public static function pregReplaceInTag($pattern, $replace, $name, $text)
 911         {
 912                 $occurrences = 0;
 913                 $pos = self::getTagPosition($text, $name, $occurrences);
 914                 while ($pos !== false && $occurrences++ < 1000) {
 915                         $start = substr($text, 0, $pos['start']['open']);
 916                         $subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
 917                         $end = substr($text, $pos['end']['close']);
 918                         if ($end === false) {
 919                                 $end = '';
 920                         }
 921
 922                         $subject = preg_replace($pattern, $replace, $subject);
 923                         $text = $start . $subject . $end;
 924
 925                         $pos = self::getTagPosition($text, $name, $occurrences);
 926                 }
 927
 928                 return $text;
 929         }
 930
 931         private static function extractImagesFromItemBody($body)
 932         {
 933                 $saved_image = [];
 934                 $orig_body = $body;
 935                 $new_body = '';
 936
 937                 $cnt = 0;
 938                 $img_start = strpos($orig_body, '[img');
 939                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 940                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 941                 while (($img_st_close !== false) && ($img_end !== false)) {
 942                         $img_st_close++; // make it point to AFTER the closing bracket
 943                         $img_end += $img_start;
 944
 945                         if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 946                                 // This is an embedded image
 947                                 $saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
 948                                 $new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
 949
 950                                 $cnt++;
 951                         } else {
 952                                 $new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
 953                         }
 954
 955                         $orig_body = substr($orig_body, $img_end + strlen('[/img]'));
 956
 957                         if ($orig_body === false) {
 958                                 // in case the body ends on a closing image tag
 959                                 $orig_body = '';
 960                         }
 961
 962                         $img_start = strpos($orig_body, '[img');
 963                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 964                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 965                 }
 966
 967                 $new_body = $new_body . $orig_body;
 968
 969                 return ['body' => $new_body, 'images' => $saved_image];
 970         }
 971
 972         private static function interpolateSavedImagesIntoItemBody($body, array $images)
 973         {
 974                 $newbody = $body;
 975
 976                 $cnt = 0;
 977                 foreach ($images as $image) {
 978                         // We're depending on the property of 'foreach' (specified on the PHP website) that
 979                         // it loops over the array starting from the first element and going sequentially
 980                         // to the last element
 981                         $newbody = str_replace('[$#saved_image' . $cnt . '#$]',
 982                                 '<img src="' . proxy_url($image) . '" alt="' . L10n::t('Image/photo') . '" />', $newbody);
 983                         $cnt++;
 984                 }
 985
 986                 return $newbody;
 987         }
 988
 989         /**
 990          * Processes [share] tags
 991          *
 992          * Note: Can produce a [bookmark] tag in the output
 993          *
 994          * @brief Processes [share] tags
 995          * @param array    $share      preg_match_callback result array
 996          * @param bool|int $simplehtml
 997          * @return string
 998          */
 999         private static function convertShare($share, $simplehtml)
1000         {
1001                 $attributes = $share[2];
1002
1003                 $author = "";
1004                 preg_match("/author='(.*?)'/ism", $attributes, $matches);
1005                 if (x($matches, 1)) {
1006                         $author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
1007                 }
1008
1009                 preg_match('/author="(.*?)"/ism', $attributes, $matches);
1010                 if (x($matches, 1)) {
1011                         $author = $matches[1];
1012                 }
1013
1014                 $profile = "";
1015                 preg_match("/profile='(.*?)'/ism", $attributes, $matches);
1016                 if (x($matches, 1)) {
1017                         $profile = $matches[1];
1018                 }
1019
1020                 preg_match('/profile="(.*?)"/ism', $attributes, $matches);
1021                 if (x($matches, 1)) {
1022                         $profile = $matches[1];
1023                 }
1024
1025                 $avatar = "";
1026                 preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
1027                 if (x($matches, 1)) {
1028                         $avatar = $matches[1];
1029                 }
1030
1031                 preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
1032                 if (x($matches, 1)) {
1033                         $avatar = $matches[1];
1034                 }
1035
1036                 $link = "";
1037                 preg_match("/link='(.*?)'/ism", $attributes, $matches);
1038                 if (x($matches, 1)) {
1039                         $link = $matches[1];
1040                 }
1041
1042                 preg_match('/link="(.*?)"/ism', $attributes, $matches);
1043                 if (x($matches, 1)) {
1044                         $link = $matches[1];
1045                 }
1046
1047                 $posted = "";
1048
1049                 preg_match("/posted='(.*?)'/ism", $attributes, $matches);
1050                 if (x($matches, 1)) {
1051                         $posted = $matches[1];
1052                 }
1053
1054                 preg_match('/posted="(.*?)"/ism', $attributes, $matches);
1055                 if (x($matches, 1)) {
1056                         $posted = $matches[1];
1057                 }
1058
1059                 // We only call this so that a previously unknown contact can be added.
1060                 // This is important for the function "Model\Contact::getDetailsByURL()".
1061                 // This function then can fetch an entry from the contact table.
1062                 Contact::getIdForURL($profile, 0, true);
1063
1064                 $data = Contact::getDetailsByURL($profile);
1065
1066                 if (x($data, "name") && x($data, "addr")) {
1067                         $userid_compact = $data["name"] . " (" . $data["addr"] . ")";
1068                 } else {
1069                         $userid_compact = Protocol::getAddrFromProfileUrl($profile, $author);
1070                 }
1071
1072                 if (x($data, "addr")) {
1073                         $userid = $data["addr"];
1074                 } else {
1075                         $userid = Protocol::formatMention($profile, $author);
1076                 }
1077
1078                 if (x($data, "name")) {
1079                         $author = $data["name"];
1080                 }
1081
1082                 if (x($data, "micro")) {
1083                         $avatar = $data["micro"];
1084                 }
1085
1086                 $preshare = trim($share[1]);
1087                 if ($preshare != "") {
1088                         $preshare .= "<br />";
1089                 }
1090
1091                 switch ($simplehtml) {
1092                         case 1:
1093                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' <a href="' . $profile . '">' . $userid . "</a>: <br />»" . $share[3] . "«";
1094                                 break;
1095                         case 2:
1096                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1097                                 break;
1098                         case 3: // Diaspora
1099                                 $headline = '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';
1100
1101                                 $text = trim($share[1]);
1102
1103                                 if ($text != "") {
1104                                         $text .= "<hr />";
1105                                 }
1106
1107                                 if (stripos(normalise_link($link), 'http://twitter.com/') === 0) {
1108                                         $text .= $headline . '<blockquote>' . trim($share[3]) . "</blockquote><br />";
1109
1110                                         if ($link != "") {
1111                                                 $text .= '<br /><a href="' . $link . '">[l]</a>';
1112                                         }
1113                                 } else {
1114                                         $text .= '<br /><a href="' . $link . '">' . $link . '</a>';
1115                                 }
1116
1117                                 break;
1118                         case 4:
1119                                 $headline = '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
1120                                 $headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
1121                                 $headline .= ":</b><br />";
1122
1123                                 $text = trim($share[1]);
1124
1125                                 if ($text != "") {
1126                                         $text .= "<hr />";
1127                                 }
1128
1129                                 $text .= $headline . '<blockquote class="shared_content">' . trim($share[3]) . "</blockquote><br />";
1130
1131                                 break;
1132                         case 5:
1133                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1134                                 break;
1135                         case 6: // app.net
1136                                 $text = $preshare . "&gt;&gt; @" . $userid_compact . ": <br />" . $share[3];
1137                                 break;
1138                         case 7: // statusnet/GNU Social
1139                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . " @" . $userid_compact . ": " . $share[3];
1140                                 break;
1141                         case 8: // twitter
1142                                 $text = $preshare . "RT @" . $userid_compact . ": " . $share[3];
1143                                 break;
1144                         case 9: // Google+/Facebook
1145                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1146
1147                                 if ($link != "") {
1148                                         $text .= "<br /><br />" . $link;
1149                                 }
1150                                 break;
1151                         default:
1152                                 // Transforms quoted tweets in rich attachments to avoid nested tweets
1153                                 if (stripos(normalise_link($link), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($link)) {
1154                                         try {
1155                                                 $oembed = OEmbed::getHTML($link, $preshare);
1156                                         } catch (Exception $e) {
1157                                                 $oembed = sprintf('[bookmark=%s]%s[/bookmark]', $link, $preshare);
1158                                         }
1159
1160                                         $text = $preshare . $oembed;
1161                                 } else {
1162                                         $text = trim($share[1]) . "\n";
1163
1164                                         $avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);
1165
1166                                         $tpl = get_markup_template('shared_content.tpl');
1167                                         $text .= replace_macros($tpl, [
1168                                                 '$profile' => $profile,
1169                                                 '$avatar' => $avatar,
1170                                                 '$author' => $author,
1171                                                 '$link' => $link,
1172                                                 '$posted' => $posted,
1173                                                 '$content' => trim($share[3])
1174                                         ]);
1175                                 }
1176                                 break;
1177                 }
1178
1179                 return $text;
1180         }
1181
1182         private static function removePictureLinksCallback($match)
1183         {
1184                 $text = Cache::get($match[1]);
1185
1186                 if (is_null($text)) {
1187                         $a = self::getApp();
1188
1189                         $stamp1 = microtime(true);
1190
1191                         $ch = @curl_init($match[1]);
1192                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1193                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1194                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
1195                         @curl_exec($ch);
1196                         $curl_info = @curl_getinfo($ch);
1197
1198                         $a->save_timestamp($stamp1, "network");
1199
1200                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1201                                 $text = "[url=" . $match[1] . "]" . $match[1] . "[/url]";
1202                         } else {
1203                                 $text = "[url=" . $match[2] . "]" . $match[2] . "[/url]";
1204
1205                                 // if its not a picture then look if its a page that contains a picture link
1206                                 $body = Network::fetchUrl($match[1]);
1207
1208                                 $doc = new DOMDocument();
1209                                 @$doc->loadHTML($body);
1210                                 $xpath = new DomXPath($doc);
1211                                 $list = $xpath->query("//meta[@name]");
1212                                 foreach ($list as $node) {
1213                                         $attr = [];
1214
1215                                         if ($node->attributes->length) {
1216                                                 foreach ($node->attributes as $attribute) {
1217                                                         $attr[$attribute->name] = $attribute->value;
1218                                                 }
1219                                         }
1220
1221                                         if (strtolower($attr["name"]) == "twitter:image") {
1222                                                 $text = "[url=" . $attr["content"] . "]" . $attr["content"] . "[/url]";
1223                                         }
1224                                 }
1225                         }
1226                         Cache::set($match[1], $text);
1227                 }
1228
1229                 return $text;
1230         }
1231
1232         private static function expandLinksCallback($match)
1233         {
1234                 if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
1235                         return ($match[1] . "[url]" . $match[2] . "[/url]");
1236                 } else {
1237                         return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
1238                 }
1239         }
1240
1241         private static function cleanPictureLinksCallback($match)
1242         {
1243                 $text = Cache::get($match[1]);
1244
1245                 if (is_null($text)) {
1246                         $a = self::getApp();
1247
1248                         $stamp1 = microtime(true);
1249
1250                         $ch = @curl_init($match[1]);
1251                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1252                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1253                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
1254                         @curl_exec($ch);
1255                         $curl_info = @curl_getinfo($ch);
1256
1257                         $a->save_timestamp($stamp1, "network");
1258
1259                         // if its a link to a picture then embed this picture
1260                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1261                                 $text = "[img]" . $match[1] . "[/img]";
1262                         } else {
1263                                 $text = "[img]" . $match[2] . "[/img]";
1264
1265                                 // if its not a picture then look if its a page that contains a picture link
1266                                 $body = Network::fetchUrl($match[1]);
1267
1268                                 $doc = new DOMDocument();
1269                                 @$doc->loadHTML($body);
1270                                 $xpath = new DOMXPath($doc);
1271                                 $list = $xpath->query("//meta[@name]");
1272                                 foreach ($list as $node) {
1273                                         $attr = [];
1274                                         if ($node->attributes->length) {
1275                                                 foreach ($node->attributes as $attribute) {
1276                                                         $attr[$attribute->name] = $attribute->value;
1277                                                 }
1278                                         }
1279
1280                                         if (strtolower($attr["name"]) == "twitter:image") {
1281                                                 $text = "[img]" . $attr["content"] . "[/img]";
1282                                         }
1283                                 }
1284                         }
1285                         Cache::set($match[1], $text);
1286                 }
1287
1288                 return $text;
1289         }
1290
1291         public static function cleanPictureLinks($text)
1292         {
1293                 $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
1294                 return $return;
1295         }
1296
1297         private static function textHighlightCallback($match)
1298         {
1299                 if (in_array(strtolower($match[1]),
1300                                 ['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
1301                                 'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh'])
1302                 ) {
1303                         return text_highlight($match[2], strtolower($match[1]));
1304                 }
1305                 return $match[0];
1306         }
1307
1308         /**
1309          * @brief Converts a BBCode message to HTML message
1310          *
1311          * BBcode 2 HTML was written by WAY2WEB.net
1312          * extended to work with Mistpark/Friendica - Mike Macgirvin
1313          *
1314          * Simple HTML values meaning:
1315          * - 0: Friendica display
1316          * - 1: Unused
1317          * - 2: Used for Facebook, Google+, Windows Phone push, Friendica API
1318          * - 3: Used before converting to Markdown in bb2diaspora.php
1319          * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
1320          * - 5: Unused
1321          * - 6: Used for Appnet
1322          * - 7: Used for dfrn, OStatus
1323          * - 8: Used for WP backlink text setting
1324          *
1325          * @param string $text
1326          * @param bool   $try_oembed
1327          * @param int    $simple_html
1328          * @param bool   $for_plaintext
1329          * @return string
1330          */
1331         public static function convert($text, $try_oembed = true, $simple_html = false, $for_plaintext = false)
1332         {
1333                 $a = self::getApp();
1334
1335                 /*
1336                  * preg_match_callback function to replace potential Oembed tags with Oembed content
1337                  *
1338                  * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
1339                  * $match[1] = $url
1340                  * $match[2] = $title or absent
1341                  */
1342                 $try_oembed_callback = function ($match)
1343                 {
1344                         $url = $match[1];
1345                         $title = defaults($match, 2, null);
1346
1347                         try {
1348                                 $return = OEmbed::getHTML($url, $title);
1349                         } catch (Exception $ex) {
1350                                 $return = $match[0];
1351                         }
1352
1353                         return $return;
1354                 };
1355
1356                 // Hide all [noparse] contained bbtags by spacefying them
1357                 // POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?
1358
1359                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::escapeNoparseCallback', $text);
1360                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::escapeNoparseCallback', $text);
1361                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::escapeNoparseCallback', $text);
1362
1363                 // Remove the abstract element. It is a non visible element.
1364                 $text = self::stripAbstract($text);
1365
1366                 // Move all spaces out of the tags
1367                 $text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $text);
1368                 $text = preg_replace("/(\s*)\[\/(\w*)\]/ism", '[/$2]$1', $text);
1369
1370                 // Extract the private images which use data urls since preg has issues with
1371                 // large data sizes. Stash them away while we do bbcode conversion, and then put them back
1372                 // in after we've done all the regex matching. We cannot use any preg functions to do this.
1373
1374                 $extracted = self::extractImagesFromItemBody($text);
1375                 $text = $extracted['body'];
1376                 $saved_image = $extracted['images'];
1377
1378                 // If we find any event code, turn it into an event.
1379                 // After we're finished processing the bbcode we'll
1380                 // replace all of the event code with a reformatted version.
1381
1382                 $ev = bbtoevent($text);
1383
1384                 // Replace any html brackets with HTML Entities to prevent executing HTML or script
1385                 // Don't use strip_tags here because it breaks [url] search by replacing & with amp
1386
1387                 $text = str_replace("<", "&lt;", $text);
1388                 $text = str_replace(">", "&gt;", $text);
1389
1390                 // remove some newlines before the general conversion
1391                 $text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $text);
1392                 $text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $text);
1393
1394                 $text = preg_replace("/\n\[code\]/ism", "[code]", $text);
1395                 $text = preg_replace("/\[\/code\]\n/ism", "[/code]", $text);
1396
1397                 // when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
1398                 if (!$try_oembed) {
1399                         $text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text);
1400                 }
1401
1402                 // Check for [code] text here, before the linefeeds are messed with.
1403                 // The highlighter will unescape and re-escape the content.
1404                 if (strpos($text, '[code=') !== false) {
1405                         $text = preg_replace_callback("/\[code=(.*?)\](.*?)\[\/code\]/ism", 'self::textHighlightCallback', $text);
1406                 }
1407                 // Convert new line chars to html <br /> tags
1408
1409                 // nlbr seems to be hopelessly messed up
1410                 //      $Text = nl2br($Text);
1411
1412                 // We'll emulate it.
1413
1414                 $text = trim($text);
1415                 $text = str_replace("\r\n", "\n", $text);
1416
1417                 // removing multiplicated newlines
1418                 if (Config::get("system", "remove_multiplicated_lines")) {
1419                         $search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
1420                                         "\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
1421                         $replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
1422                                         "[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
1423                         do {
1424                                 $oldtext = $text;
1425                                 $text = str_replace($search, $replace, $text);
1426                         } while ($oldtext != $text);
1427                 }
1428
1429                 // Set up the parameters for a URL search string
1430                 $URLSearchString = "^\[\]";
1431                 // Set up the parameters for a MAIL search string
1432                 $MAILSearchString = $URLSearchString;
1433
1434                 // if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
1435                 if (!$for_plaintext) {
1436                         // Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
1437                         // Currently disabled, since the function is too greedy
1438                         // $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
1439                         $autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
1440                         $text = preg_replace($autolink_regex, '$1[url]$2[/url]', $text);
1441                         if ($simple_html == 7) {
1442                                 $text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForMastodonCallback', $text);
1443                                 $text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForMastodonCallback', $text);
1444                         }
1445                 } else {
1446                         $text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $text);
1447                         $text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::removePictureLinksCallback', $text);
1448                 }
1449
1450
1451                 // Handle attached links or videos
1452                 $text = self::convertAttachment($text, $simple_html, $try_oembed);
1453
1454                 $text = str_replace(["\r","\n"], ['<br />', '<br />'], $text);
1455
1456                 // Remove all hashtag addresses
1457                 if ((!$try_oembed || $simple_html) && !in_array($simple_html, [3, 7])) {
1458                         $text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $text);
1459                 } elseif ($simple_html == 3) {
1460                         // The ! is converted to @ since Diaspora only understands the @
1461                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1462                                 '@<a href="$2">$3</a>',
1463                                 $text);
1464                 } elseif ($simple_html == 7) {
1465                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1466                                 '$1<span class="vcard"><a href="$2" class="url" title="$3"><span class="fn nickname mention">$3</span></a></span>',
1467                                 $text);
1468                 } elseif (!$simple_html) {
1469                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1470                                 '$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
1471                                 $text);
1472                 }
1473
1474                 // Bookmarks in red - will be converted to bookmarks in friendica
1475                 $text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text);
1476                 $text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text);
1477                 $text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
1478                                         "[bookmark=$1]$2[/bookmark]", $text);
1479
1480                 if (in_array($simple_html, [2, 6, 7, 8, 9])) {
1481                         $text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "self::expandLinksCallback", $text);
1482                         //$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
1483                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$text);
1484                 }
1485
1486                 if ($simple_html == 5) {
1487                         $text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $text);
1488                 }
1489
1490                 // Perform URL Search
1491                 if ($try_oembed) {
1492                         $text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text);
1493                 }
1494
1495                 if ($simple_html == 5) {
1496                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $text);
1497                 } else {
1498                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text);
1499                 }
1500
1501                 // Handle Diaspora posts
1502                 $text = preg_replace_callback(
1503                         "&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
1504                         function ($match) {
1505                                 return "[url=" . System::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]";
1506                         }, $text
1507                 );
1508
1509                 // Server independent link to posts and comments
1510                 // See issue: https://github.com/diaspora/diaspora_federation/issues/75
1511                 $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
1512                 $text = preg_replace($expression, System::baseUrl()."/display/$1", $text);
1513
1514                 $text = preg_replace("/([#])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1515                                         '$1<a href="' . System::baseUrl() . '/search?tag=$3" class="tag" title="$3">$3</a>', $text);
1516
1517                 $text = preg_replace("/\[url\=([$URLSearchString]*)\]#(.*?)\[\/url\]/ism",
1518                                         '#<a href="' . System::baseUrl() . '/search?tag=$2" class="tag" title="$2">$2</a>', $text);
1519
1520                 $text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $text);
1521                 $text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1522                 //$Text = preg_replace("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
1523
1524                 // Red compatibility, though the link can't be authenticated on Friendica
1525                 $text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1526
1527
1528                 // we may need to restrict this further if it picks up too many strays
1529                 // link acct:user@host to a webfinger profile redirector
1530
1531                 $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);
1532
1533                 // Perform MAIL Search
1534                 $text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $text);
1535                 $text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $text);
1536
1537                 // leave open the posibility of [map=something]
1538                 // this is replaced in prepare_body() which has knowledge of the item location
1539
1540                 if (strpos($text, '[/map]') !== false) {
1541                         $text = preg_replace_callback(
1542                                 "/\[map\](.*?)\[\/map\]/ism",
1543                                 function ($match) {
1544                                         // the extra space in the following line is intentional
1545                                         // Whyyy? - @MrPetovan
1546                                         return str_replace($match[0], '<div class="map"  >' . Map::byLocation($match[1]) . '</div>', $match[0]);
1547                                 },
1548                                 $text
1549                         );
1550                 }
1551                 if (strpos($text, '[map=') !== false) {
1552                         $text = preg_replace_callback(
1553                                 "/\[map=(.*?)\]/ism",
1554                                 function ($match) {
1555                                         // the extra space in the following line is intentional
1556                                         // Whyyy? - @MrPetovan
1557                                         return str_replace($match[0], '<div class="map"  >' . Map::byCoordinates(str_replace('/', ' ', $match[1])) . '</div>', $match[0]);
1558                                 },
1559                                 $text
1560                         );
1561                 }
1562                 if (strpos($text, '[map]') !== false) {
1563                         $text = preg_replace("/\[map\]/", '<div class="map"></div>', $text);
1564                 }
1565
1566                 // Check for headers
1567                 $text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $text);
1568                 $text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $text);
1569                 $text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $text);
1570                 $text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $text);
1571                 $text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $text);
1572                 $text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $text);
1573
1574                 // Check for paragraph
1575                 $text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $text);
1576
1577                 // Check for bold text
1578                 $text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $text);
1579
1580                 // Check for Italics text
1581                 $text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $text);
1582
1583                 // Check for Underline text
1584                 $text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $text);
1585
1586                 // Check for strike-through text
1587                 $text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<strike>$1</strike>', $text);
1588
1589                 // Check for over-line text
1590                 $text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $text);
1591
1592                 // Check for colored text
1593                 $text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $text);
1594
1595                 // Check for sized text
1596                 // [size=50] --> font-size: 50px (with the unit).
1597                 $text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $text);
1598                 $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $text);
1599
1600                 // Check for centered text
1601                 $text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $text);
1602
1603                 // Check for list text
1604                 $text = str_replace("[*]", "<li>", $text);
1605
1606                 // Check for style sheet commands
1607                 $text = preg_replace_callback(
1608                         "(\[style=(.*?)\](.*?)\[\/style\])ism",
1609                         function ($match) {
1610                                 return "<span style=\"" . HTML::sanitizeCSS($match[1]) . ";\">" . $match[2] . "</span>";
1611                         },
1612                         $text
1613                 );
1614
1615                 // Check for CSS classes
1616                 $text = preg_replace_callback(
1617                         "(\[class=(.*?)\](.*?)\[\/class\])ism",
1618                         function ($match) {
1619                                 return "<span class=\"" . HTML::sanitizeCSS($match[1]) . "\">" . $match[2] . "</span>";
1620                         },
1621                         $text
1622                 );
1623
1624                 // handle nested lists
1625                 $endlessloop = 0;
1626
1627                 while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) ||
1628                            ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) ||
1629                            ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) ||
1630                            ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) {
1631                         $text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1632                         $text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $text);
1633                         $text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1634                         $text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $text);
1635                         $text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $text);
1636                         $text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $text);
1637                         $text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $text);
1638                         $text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1639                         $text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1640                         $text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $text);
1641                 }
1642
1643                 $text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $text);
1644                 $text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $text);
1645                 $text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $text);
1646                 $text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $text);
1647
1648                 $text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $text);
1649                 $text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $text);
1650
1651                 $text = str_replace('[hr]', '<hr />', $text);
1652
1653                 // This is actually executed in prepare_body()
1654
1655                 $text = str_replace('[nosmile]', '', $text);
1656
1657                 // Check for font change text
1658                 $text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $text);
1659
1660                 // Declare the format for [code] layout
1661
1662                 $CodeLayout = '<code>$1</code>';
1663                 // Check for [code] text
1664                 $text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $text);
1665
1666                 // Declare the format for [spoiler] layout
1667                 $SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';
1668
1669                 // Check for [spoiler] text
1670                 // handle nested quotes
1671                 $endlessloop = 0;
1672                 while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
1673                         $text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", "$SpoilerLayout", $text);
1674                 }
1675
1676                 // Check for [spoiler=Author] text
1677
1678                 $t_wrote = L10n::t('$1 wrote:');
1679
1680                 // handle nested quotes
1681                 $endlessloop = 0;
1682                 while ((strpos($text, "[/spoiler]")!== false)  && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
1683                         $text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
1684                                                  "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
1685                                                  $text);
1686                 }
1687
1688                 // Declare the format for [quote] layout
1689                 $QuoteLayout = '<blockquote>$1</blockquote>';
1690
1691                 // Check for [quote] text
1692                 // handle nested quotes
1693                 $endlessloop = 0;
1694                 while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) {
1695                         $text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text);
1696                 }
1697
1698                 // Check for [quote=Author] text
1699
1700                 $t_wrote = L10n::t('$1 wrote:');
1701
1702                 // handle nested quotes
1703                 $endlessloop = 0;
1704                 while ((strpos($text, "[/quote]")!== false)  && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) {
1705                         $text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
1706                                                  "<p><strong class=".'"author"'.">" . $t_wrote . "</strong></p><blockquote>$2</blockquote>",
1707                                                  $text);
1708                 }
1709
1710
1711                 // [img=widthxheight]image source[/img]
1712                 $text = preg_replace_callback(
1713                         "/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism",
1714                         function ($matches) {
1715                                 if (strpos($matches[3], "data:image/") === 0) {
1716                                         return $matches[0];
1717                                 }
1718
1719                                 $matches[3] = proxy_url($matches[3]);
1720                                 return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
1721                         },
1722                         $text
1723                 );
1724
1725                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $text);
1726                 $text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $text);
1727
1728                 // Images
1729                 // [img]pathtoimage[/img]
1730                 $text = preg_replace_callback(
1731                         "/\[img\](.*?)\[\/img\]/ism",
1732                         function ($matches) {
1733                                 if (strpos($matches[1], "data:image/") === 0) {
1734                                         return $matches[0];
1735                                 }
1736
1737                                 $matches[1] = proxy_url($matches[1]);
1738                                 return "[img]" . $matches[1] . "[/img]";
1739                         },
1740                         $text
1741                 );
1742
1743                 $text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1744                 $text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1745
1746                 // Shared content
1747                 $text = preg_replace_callback("/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
1748                         function ($match) use ($simple_html) {
1749                                 return self::convertShare($match, $simple_html);
1750                         }, $text);
1751
1752                 $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);
1753                 $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 />', $text);
1754                 //$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 />', $Text);
1755
1756                 // Try to Oembed
1757                 if ($try_oembed) {
1758                         $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);
1759                         $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);
1760
1761                         $text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text);
1762                         $text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text);
1763                 } else {
1764                         $text = preg_replace("/\[video\](.*?)\[\/video\]/",
1765                                                 '<a href="$1" target="_blank">$1</a>', $text);
1766                         $text = preg_replace("/\[audio\](.*?)\[\/audio\]/",
1767                                                 '<a href="$1" target="_blank">$1</a>', $text);
1768                 }
1769
1770                 // html5 video and audio
1771
1772
1773                 if ($try_oembed) {
1774                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $text);
1775                 } else {
1776                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $text);
1777                 }
1778
1779                 // Youtube extensions
1780                 if ($try_oembed) {
1781                         $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1782                         $text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1783                         $text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1784                 }
1785
1786                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1787                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1788                 $text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1789
1790                 if ($try_oembed) {
1791                         $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);
1792                 } else {
1793                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
1794                                                 '<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $text);
1795                 }
1796
1797                 if ($try_oembed) {
1798                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1799                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1800                 }
1801
1802                 $text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1803                 $text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1804
1805                 if ($try_oembed) {
1806                         $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);
1807                 } else {
1808                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
1809                                                 '<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $text);
1810                 }
1811
1812                 // oembed tag
1813                 $text = OEmbed::BBCode2HTML($text);
1814
1815                 // Avoid triple linefeeds through oembed
1816                 $text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $text);
1817
1818                 // If we found an event earlier, strip out all the event code and replace with a reformatted version.
1819                 // Replace the event-start section with the entire formatted event. The other bbcode is stripped.
1820                 // Summary (e.g. title) is required, earlier revisions only required description (in addition to
1821                 // start which is always required). Allow desc with a missing summary for compatibility.
1822
1823                 if ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
1824                         $sub = format_event_html($ev, $simple_html);
1825
1826                         $text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
1827                         $text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
1828                         $text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text);
1829                         $text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text);
1830                         $text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text);
1831                         $text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $text);
1832                         $text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text);
1833                 }
1834
1835                 // Replace non graphical smilies for external posts
1836                 if ($simple_html) {
1837                         $text = Smilies::replace($text, false, true);
1838                 }
1839
1840                 // Replace inline code blocks
1841                 $text = preg_replace_callback("|(?!<br[^>]*>)<code>([^<]*)</code>(?!<br[^>]*>)|ism",
1842                         function ($match) use ($simple_html) {
1843                                 $return = '<key>' . $match[1] . '</key>';
1844                                 // Use <code> for Diaspora inline code blocks
1845                                 if ($simple_html === 3) {
1846                                         $return = '<code>' . $match[1] . '</code>';
1847                                 }
1848                                 return $return;
1849                         }
1850                 , $text);
1851
1852                 // Unhide all [noparse] contained bbtags unspacefying them
1853                 // and triming the [noparse] tag.
1854
1855                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::unescapeNoparseCallback', $text);
1856                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::unescapeNoparseCallback', $text);
1857                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::unescapeNoparseCallback', $text);
1858
1859
1860                 $text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $text);
1861                 $text = preg_replace('/\&\#039\;/', '\'', $text);
1862                 $text = preg_replace('/\&quot\;/', '"', $text);
1863
1864                 // fix any escaped ampersands that may have been converted into links
1865                 $text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
1866
1867                 // sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
1868                 $allowed_src_protocols = ['http', 'redir', 'cid'];
1869                 $text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
1870                                          '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $text);
1871
1872                 // sanitize href attributes (only whitelisted protocols URLs)
1873                 // default value for backward compatibility
1874                 $allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);
1875
1876                 // Always allowed protocol even if config isn't set or not including it
1877                 $allowed_link_protocols[] = 'http';
1878                 $allowed_link_protocols[] = 'redir/';
1879
1880                 $regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
1881                 $text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . L10n::t('Invalid link protocol') . '">', $text);
1882
1883                 if ($saved_image) {
1884                         $text = self::interpolateSavedImagesIntoItemBody($text, $saved_image);
1885                 }
1886
1887                 // Clean up the HTML by loading and saving the HTML with the DOM.
1888                 // Bad structured html can break a whole page.
1889                 // For performance reasons do it only with ativated item cache or at export.
1890                 if (!$try_oembed || (get_itemcachepath() != "")) {
1891                         $doc = new DOMDocument();
1892                         $doc->preserveWhiteSpace = false;
1893
1894                         $text = mb_convert_encoding($text, 'HTML-ENTITIES', "UTF-8");
1895
1896                         $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
1897                         $encoding = '<?xml encoding="UTF-8">';
1898                         @$doc->loadHTML($encoding.$doctype."<html><body>".$text."</body></html>");
1899                         $doc->encoding = 'UTF-8';
1900                         $text = $doc->saveHTML();
1901                         $text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $text);
1902
1903                         $text = str_replace('<br></li>', '</li>', $text);
1904
1905                         //$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
1906                 }
1907
1908                 // Clean up some useless linebreaks in lists
1909                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1910                 //$Text = str_replace('</ul><br />', '</ul>', $Text);
1911                 //$Text = str_replace('</li><br />', '</li>', $Text);
1912                 //$Text = str_replace('<br /><li>', '<li>', $Text);
1913                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1914
1915                 Addon::callHooks('bbcode', $text);
1916
1917                 return trim($text);
1918         }
1919
1920         /**
1921          * @brief Strips the "abstract" tag from the provided text
1922          *
1923          * @param string $text The text with BBCode
1924          * @return string The same text - but without "abstract" element
1925          */
1926         public static function stripAbstract($text)
1927         {
1928                 $text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", '', $text);
1929                 $text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", '', $text);
1930
1931                 return $text;
1932         }
1933
1934         /**
1935          * @brief Returns the value of the "abstract" element
1936          *
1937          * @param string $text The text that maybe contains the element
1938          * @param string $addon The addon for which the abstract is meant for
1939          * @return string The abstract
1940          */
1941         private static function getAbstract($text, $addon = "")
1942         {
1943                 $abstract = "";
1944                 $abstracts = [];
1945                 $addon = strtolower($addon);
1946
1947                 if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism", $text, $results, PREG_SET_ORDER)) {
1948                         foreach ($results AS $result) {
1949                                 $abstracts[strtolower($result[1])] = $result[2];
1950                         }
1951                 }
1952
1953                 if (isset($abstracts[$addon])) {
1954                         $abstract = $abstracts[$addon];
1955                 }
1956
1957                 if ($abstract == "" && preg_match("/\[abstract\](.*?)\[\/abstract\]/ism", $text, $result)) {
1958                         $abstract = $result[1];
1959                 }
1960
1961                 return $abstract;
1962         }
1963
1964         /**
1965          * @brief Callback function to replace a Friendica style mention in a mention for Diaspora
1966          *
1967          * @param array $match Matching values for the callback
1968          * @return string Replaced mention
1969          */
1970         private static function bbCodeMention2DiasporaCallback($match)
1971         {
1972                 $contact = Contact::getDetailsByURL($match[3]);
1973
1974                 if (empty($contact['addr'])) {
1975                         $contact = Probe::uri($match[3]);
1976                 }
1977
1978                 if (empty($contact['addr'])) {
1979                         return $match[0];
1980                 }
1981
1982                 $mention = '@{' . $match[2] . '; ' . $contact['addr'] . '}';
1983                 return $mention;
1984         }
1985
1986         /**
1987          * @brief Converts a BBCode text into Markdown
1988          *
1989          * This function converts a BBCode item body to be sent to Markdown-enabled
1990          * systems like Diaspora and Libertree
1991          *
1992          * @param string $text
1993          * @param bool   $for_diaspora Diaspora requires more changes than Libertree
1994          * @return string
1995          */
1996         public static function toMarkdown($text, $for_diaspora = true)
1997         {
1998                 $a = self::getApp();
1999
2000                 $original_text = $text;
2001
2002                 // Since Diaspora is creating a summary for links, this function removes them before posting
2003                 if ($for_diaspora) {
2004                         $text = self::removeShareInformation($text);
2005                 }
2006
2007                 /**
2008                  * Transform #tags, strip off the [url] and replace spaces with underscore
2009                  */
2010                 $url_search_string = "^\[\]";
2011                 $text = preg_replace_callback("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/i",
2012                         function ($matches) {
2013                                 return '#' . str_replace(' ', '_', $matches[2]);
2014                         },
2015                         $text
2016                 );
2017
2018                 // Converting images with size parameters to simple images. Markdown doesn't know it.
2019                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text);
2020
2021                 // Extracting multi-line code blocks before the whitespace processing/code highlighter in self::convert()
2022                 $codeblocks = [];
2023
2024                 $text = preg_replace_callback("#\[code(?:=([^\]]*))?\](.*?)\[\/code\]#is",
2025                         function ($matches) use (&$codeblocks) {
2026                                 $return = $matches[0];
2027                                 if (strpos($matches[2], "\n") !== false) {
2028                                         $return = '#codeblock-' . count($codeblocks) . '#';
2029
2030                                         $prefix = '````' . $matches[1] . PHP_EOL;
2031                                         $codeblocks[] = $prefix . trim($matches[2]) . PHP_EOL . '````';
2032                                 }
2033                                 return $return;
2034                         },
2035                         $text
2036                 );
2037
2038                 // Convert it to HTML - don't try oembed
2039                 if ($for_diaspora) {
2040                         $text = self::convert($text, false, 3);
2041
2042                         // Add all tags that maybe were removed
2043                         if (preg_match_all("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/ism", $original_text, $tags)) {
2044                                 $tagline = "";
2045                                 foreach ($tags[2] as $tag) {
2046                                         $tag = html_entity_decode($tag, ENT_QUOTES, 'UTF-8');
2047                                         if (!strpos(html_entity_decode($text, ENT_QUOTES, 'UTF-8'), '#' . $tag)) {
2048                                                 $tagline .= '#' . $tag . ' ';
2049                                         }
2050                                 }
2051                                 $text = $text . " " . $tagline;
2052                         }
2053                 } else {
2054                         $text = self::convert($text, false, 4);
2055                 }
2056
2057                 // mask some special HTML chars from conversation to markdown
2058                 $text = str_replace(['&lt;', '&gt;', '&amp;'], ['&_lt_;', '&_gt_;', '&_amp_;'], $text);
2059
2060                 // If a link is followed by a quote then there should be a newline before it
2061                 // Maybe we should make this newline at every time before a quote.
2062                 $text = str_replace(["</a><blockquote>"], ["</a><br><blockquote>"], $text);
2063
2064                 $stamp1 = microtime(true);
2065
2066                 // Now convert HTML to Markdown
2067                 $converter = new HtmlConverter();
2068                 $text = $converter->convert($text);
2069
2070                 // unmask the special chars back to HTML
2071                 $text = str_replace(['&\_lt\_;', '&\_gt\_;', '&\_amp\_;'], ['&lt;', '&gt;', '&amp;'], $text);
2072
2073                 $a->save_timestamp($stamp1, "parser");
2074
2075                 // Libertree has a problem with escaped hashtags.
2076                 $text = str_replace(['\#'], ['#'], $text);
2077
2078                 // Remove any leading or trailing whitespace, as this will mess up
2079                 // the Diaspora signature verification and cause the item to disappear
2080                 $text = trim($text);
2081
2082                 if ($for_diaspora) {
2083                         $url_search_string = "^\[\]";
2084                         $text = preg_replace_callback(
2085                                 "/([@]\[(.*?)\])\(([$url_search_string]*?)\)/ism",
2086                                 ['self', 'bbCodeMention2DiasporaCallback'],
2087                                 $text
2088                         );
2089                 }
2090
2091                 // Restore code blocks
2092                 $text = preg_replace_callback('/#codeblock-([0-9]+)#/iU',
2093                         function ($matches) use ($codeblocks) {
2094                                 $return = '';
2095                                 if (isset($codeblocks[intval($matches[1])])) {
2096                                         $return = $codeblocks[$matches[1]];
2097                                 }
2098                                 return $return;
2099                         },
2100                         $text
2101                 );
2102
2103                 Addon::callHooks('bb2diaspora', $text);
2104
2105                 return $text;
2106         }
2107 }