src/Content/Text/BBCode.php

   1 <?php
   2 /**
   3  * @file src/Content/Text/BBCode.php
   4  */
   5 namespace Friendica\Content\Text;
   6
   7 use DOMDocument;
   8 use DomXPath;
   9 use Exception;
  10 use Friendica\Content\OEmbed;
  11 use Friendica\Content\Smilies;
  12 use Friendica\Content\Text\Plaintext;
  13 use Friendica\Core\Addon;
  14 use Friendica\Core\Cache;
  15 use Friendica\Core\Config;
  16 use Friendica\Core\L10n;
  17 use Friendica\Core\Protocol;
  18 use Friendica\Core\PConfig;
  19 use Friendica\Core\System;
  20 use Friendica\Model\Contact;
  21 use Friendica\Object\Image;
  22 use Friendica\Util\Map;
  23 use Friendica\Util\Network;
  24 use Friendica\Util\ParseUrl;
  25
  26 require_once "include/event.php";
  27 require_once "include/html2plain.php";
  28 require_once "mod/proxy.php";
  29
  30 class BBCode
  31 {
  32         /**
  33          * @brief Fetches attachment data that were generated the old way
  34          *
  35          * @param string $body Message body
  36          * @return array
  37          * 'type' -> Message type ("link", "video", "photo")
  38          * 'text' -> Text before the shared message
  39          * 'after' -> Text after the shared message
  40          * 'image' -> Preview image of the message
  41          * 'url' -> Url to the attached message
  42          * 'title' -> Title of the attachment
  43          * 'description' -> Description of the attachment
  44          */
  45         private static function getOldAttachmentData($body)
  46         {
  47                 $post = [];
  48
  49                 // Simplify image codes
  50                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
  51
  52                 if (preg_match_all("(\[class=(.*?)\](.*?)\[\/class\])ism", $body, $attached, PREG_SET_ORDER)) {
  53                         foreach ($attached as $data) {
  54                                 if (!in_array($data[1], ["type-link", "type-video", "type-photo"])) {
  55                                         continue;
  56                                 }
  57
  58                                 $post["type"] = substr($data[1], 5);
  59
  60                                 $pos = strpos($body, $data[0]);
  61                                 if ($pos > 0) {
  62                                         $post["text"] = trim(substr($body, 0, $pos));
  63                                         $post["after"] = trim(substr($body, $pos + strlen($data[0])));
  64                                 } else {
  65                                         $post["text"] = trim(str_replace($data[0], "", $body));
  66                                 }
  67
  68                                 $attacheddata = $data[2];
  69
  70                                 $URLSearchString = "^\[\]";
  71
  72                                 if (preg_match("/\[img\]([$URLSearchString]*)\[\/img\]/ism", $attacheddata, $matches)) {
  73
  74                                         $picturedata = Image::getInfoFromURL($matches[1]);
  75
  76                                         if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) {
  77                                                 $post["image"] = $matches[1];
  78                                         } else {
  79                                                 $post["preview"] = $matches[1];
  80                                         }
  81                                 }
  82
  83                                 if (preg_match("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) {
  84                                         $post["url"] = $matches[1];
  85                                         $post["title"] = $matches[2];
  86                                 }
  87                                 if (($post["url"] == "") && (in_array($post["type"], ["link", "video"]))
  88                                         && preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
  89                                         $post["url"] = $matches[1];
  90                                 }
  91
  92                                 // Search for description
  93                                 if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) {
  94                                         $post["description"] = $matches[1];
  95                                 }
  96                         }
  97                 }
  98                 return $post;
  99         }
 100
 101         /**
 102          * @brief Fetches attachment data that were generated with the "attachment" element
 103          *
 104          * @param string $body Message body
 105          * @return array
 106          * 'type' -> Message type ("link", "video", "photo")
 107          * 'text' -> Text before the shared message
 108          * 'after' -> Text after the shared message
 109          * 'image' -> Preview image of the message
 110          * 'url' -> Url to the attached message
 111          * 'title' -> Title of the attachment
 112          * 'description' -> Description of the attachment
 113          */
 114         public static function getAttachmentData($body)
 115         {
 116                 $data = [];
 117
 118                 if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
 119                         return self::getOldAttachmentData($body);
 120                 }
 121
 122                 $attributes = $match[2];
 123
 124                 $data["text"] = trim($match[1]);
 125
 126                 $type = "";
 127                 preg_match("/type='(.*?)'/ism", $attributes, $matches);
 128                 if (x($matches, 1)) {
 129                         $type = strtolower($matches[1]);
 130                 }
 131
 132                 preg_match('/type="(.*?)"/ism', $attributes, $matches);
 133                 if (x($matches, 1)) {
 134                         $type = strtolower($matches[1]);
 135                 }
 136
 137                 if ($type == "") {
 138                         return [];
 139                 }
 140
 141                 if (!in_array($type, ["link", "audio", "photo", "video"])) {
 142                         return [];
 143                 }
 144
 145                 if ($type != "") {
 146                         $data["type"] = $type;
 147                 }
 148
 149                 $url = "";
 150                 preg_match("/url='(.*?)'/ism", $attributes, $matches);
 151                 if (x($matches, 1)) {
 152                         $url = $matches[1];
 153                 }
 154
 155                 preg_match('/url="(.*?)"/ism', $attributes, $matches);
 156                 if (x($matches, 1)) {
 157                         $url = $matches[1];
 158                 }
 159
 160                 if ($url != "") {
 161                         $data["url"] = html_entity_decode($url, ENT_QUOTES, 'UTF-8');
 162                 }
 163
 164                 $title = "";
 165                 preg_match("/title='(.*?)'/ism", $attributes, $matches);
 166                 if (x($matches, 1)) {
 167                         $title = $matches[1];
 168                 }
 169
 170                 preg_match('/title="(.*?)"/ism', $attributes, $matches);
 171                 if (x($matches, 1)) {
 172                         $title = $matches[1];
 173                 }
 174
 175                 if ($title != "") {
 176                         $title = BBCode::convert(html_entity_decode($title, ENT_QUOTES, 'UTF-8'), false, true);
 177                         $title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
 178                         $title = str_replace(["[", "]"], ["&#91;", "&#93;"], $title);
 179                         $data["title"] = $title;
 180                 }
 181
 182                 $image = "";
 183                 preg_match("/image='(.*?)'/ism", $attributes, $matches);
 184                 if (x($matches, 1)) {
 185                         $image = $matches[1];
 186                 }
 187
 188                 preg_match('/image="(.*?)"/ism', $attributes, $matches);
 189                 if (x($matches, 1)) {
 190                         $image = $matches[1];
 191                 }
 192
 193                 if ($image != "") {
 194                         $data["image"] = html_entity_decode($image, ENT_QUOTES, 'UTF-8');
 195                 }
 196
 197                 $preview = "";
 198                 preg_match("/preview='(.*?)'/ism", $attributes, $matches);
 199                 if (x($matches, 1)) {
 200                         $preview = $matches[1];
 201                 }
 202
 203                 preg_match('/preview="(.*?)"/ism', $attributes, $matches);
 204                 if (x($matches, 1)) {
 205                         $preview = $matches[1];
 206                 }
 207
 208                 if ($preview != "") {
 209                         $data["preview"] = html_entity_decode($preview, ENT_QUOTES, 'UTF-8');
 210                 }
 211
 212                 $data["description"] = trim($match[3]);
 213
 214                 $data["after"] = trim($match[4]);
 215
 216                 return $data;
 217         }
 218
 219         public static function getAttachedData($body, $item = [])
 220         {
 221                 /*
 222                 - text:
 223                 - type: link, video, photo
 224                 - title:
 225                 - url:
 226                 - image:
 227                 - description:
 228                 - (thumbnail)
 229                 */
 230
 231                 $has_title = !empty($item['title']);
 232                 $plink = (!empty($item['plink']) ? $item['plink'] : '');
 233                 $post = self::getAttachmentData($body);
 234
 235                 // if nothing is found, it maybe having an image.
 236                 if (!isset($post["type"])) {
 237                         // Simplify image codes
 238                         $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 239
 240                         $URLSearchString = "^\[\]";
 241                         if (preg_match_all("(\[url=([$URLSearchString]*)\]\s*\[img\]([$URLSearchString]*)\[\/img\]\s*\[\/url\])ism", $body, $pictures, PREG_SET_ORDER)) {
 242                                 if ((count($pictures) == 1) && !$has_title) {
 243                                         // Checking, if the link goes to a picture
 244                                         $data = ParseUrl::getSiteinfoCached($pictures[0][1], true);
 245
 246                                         // Workaround:
 247                                         // Sometimes photo posts to the own album are not detected at the start.
 248                                         // So we seem to cannot use the cache for these cases. That's strange.
 249                                         if (($data["type"] != "photo") && strstr($pictures[0][1], "/photos/")) {
 250                                                 $data = ParseUrl::getSiteinfo($pictures[0][1], true);
 251                                         }
 252
 253                                         if ($data["type"] == "photo") {
 254                                                 $post["type"] = "photo";
 255                                                 if (isset($data["images"][0])) {
 256                                                         $post["image"] = $data["images"][0]["src"];
 257                                                         $post["url"] = $data["url"];
 258                                                 } else {
 259                                                         $post["image"] = $data["url"];
 260                                                 }
 261
 262                                                 $post["preview"] = $pictures[0][2];
 263                                                 $post["text"] = str_replace($pictures[0][0], "", $body);
 264                                         } else {
 265                                                 $imgdata = Image::getInfoFromURL($pictures[0][1]);
 266                                                 if (substr($imgdata["mime"], 0, 6) == "image/") {
 267                                                         $post["type"] = "photo";
 268                                                         $post["image"] = $pictures[0][1];
 269                                                         $post["preview"] = $pictures[0][2];
 270                                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 271                                                 }
 272                                         }
 273                                 } elseif (count($pictures) > 0) {
 274                                         $post["type"] = "link";
 275                                         $post["url"] = $plink;
 276                                         $post["image"] = $pictures[0][2];
 277                                         $post["text"] = $body;
 278                                 }
 279                         } elseif (preg_match_all("(\[img\]([$URLSearchString]*)\[\/img\])ism", $body, $pictures, PREG_SET_ORDER)) {
 280                                 if ((count($pictures) == 1) && !$has_title) {
 281                                         $post["type"] = "photo";
 282                                         $post["image"] = $pictures[0][1];
 283                                         $post["text"] = str_replace($pictures[0][0], "", $body);
 284                                 } elseif (count($pictures) > 0) {
 285                                         $post["type"] = "link";
 286                                         $post["url"] = $plink;
 287                                         $post["image"] = $pictures[0][1];
 288                                         $post["text"] = $body;
 289                                 }
 290                         }
 291
 292                         // Test for the external links
 293                         preg_match_all("(\[url\]([$URLSearchString]*)\[\/url\])ism", $body, $links1, PREG_SET_ORDER);
 294                         preg_match_all("(\[url\=([$URLSearchString]*)\].*?\[\/url\])ism", $body, $links2, PREG_SET_ORDER);
 295
 296                         $links = array_merge($links1, $links2);
 297
 298                         // If there is only a single one, then use it.
 299                         // This should cover link posts via API.
 300                         if ((count($links) == 1) && !isset($post["preview"]) && !$has_title) {
 301                                 $post["type"] = "link";
 302                                 $post["text"] = trim($body);
 303                                 $post["url"] = $links[0][1];
 304                         }
 305
 306                         // Now count the number of external media links
 307                         preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $body, $links1, PREG_SET_ORDER);
 308                         preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $body, $links2, PREG_SET_ORDER);
 309                         preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $body, $links3, PREG_SET_ORDER);
 310                         preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $body, $links4, PREG_SET_ORDER);
 311
 312                         // Add them to the other external links
 313                         $links = array_merge($links, $links1, $links2, $links3, $links4);
 314
 315                         // Are there more than one?
 316                         if (count($links) > 1) {
 317                                 // The post will be the type "text", which means a blog post
 318                                 unset($post["type"]);
 319                                 $post["url"] = $plink;
 320                         }
 321
 322                         if (!isset($post["type"])) {
 323                                 $post["type"] = "text";
 324                                 $post["text"] = trim($body);
 325                         }
 326                 } elseif (isset($post["url"]) && ($post["type"] == "video")) {
 327                         $data = ParseUrl::getSiteinfoCached($post["url"], true);
 328
 329                         if (isset($data["images"][0])) {
 330                                 $post["image"] = $data["images"][0]["src"];
 331                         }
 332                 }
 333
 334                 return $post;
 335         }
 336
 337         /**
 338          * @brief Convert a message into plaintext for connectors to other networks
 339          *
 340          * @param array $b The message array that is about to be posted
 341          * @param int $limit The maximum number of characters when posting to that network
 342          * @param bool $includedlinks Has an attached link to be included into the message?
 343          * @param int $htmlmode This triggers the behaviour of the bbcode conversion
 344          * @param string $target_network Name of the network where the post should go to.
 345          *
 346          * @return string The converted message
 347          */
 348         public static function toPlaintext($b, $limit = 0, $includedlinks = false, $htmlmode = 2, $target_network = "")
 349         {
 350                 // Remove the hash tags
 351                 $URLSearchString = "^\[\]";
 352                 $body = preg_replace("/([#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $b["body"]);
 353
 354                 // Add an URL element if the text contains a raw link
 355                 $body = preg_replace("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url]$2[/url]', $body);
 356
 357                 // Remove the abstract
 358                 $body = self::stripAbstract($body);
 359
 360                 // At first look at data that is attached via "type-..." stuff
 361                 // This will hopefully replaced with a dedicated bbcode later
 362                 //$post = self::getAttachedData($b["body"]);
 363                 $post = self::getAttachedData($body, $b);
 364
 365                 if (($b["title"] != "") && ($post["text"] != "")) {
 366                         $post["text"] = trim($b["title"]."\n\n".$post["text"]);
 367                 } elseif ($b["title"] != "") {
 368                         $post["text"] = trim($b["title"]);
 369                 }
 370
 371                 $abstract = "";
 372
 373                 // Fetch the abstract from the given target network
 374                 if ($target_network != "") {
 375                         $default_abstract = self::getAbstract($b["body"]);
 376                         $abstract = self::getAbstract($b["body"], $target_network);
 377
 378                         // If we post to a network with no limit we only fetch
 379                         // an abstract exactly for this network
 380                         if (($limit == 0) && ($abstract == $default_abstract)) {
 381                                 $abstract = "";
 382                         }
 383                 } else {// Try to guess the correct target network
 384                         switch ($htmlmode) {
 385                                 case 8:
 386                                         $abstract = self::getAbstract($b["body"], NETWORK_TWITTER);
 387                                         break;
 388                                 case 7:
 389                                         $abstract = self::getAbstract($b["body"], NETWORK_STATUSNET);
 390                                         break;
 391                                 case 6:
 392                                         $abstract = self::getAbstract($b["body"], NETWORK_APPNET);
 393                                         break;
 394                                 default: // We don't know the exact target.
 395                                         // We fetch an abstract since there is a posting limit.
 396                                         if ($limit > 0) {
 397                                                 $abstract = self::getAbstract($b["body"]);
 398                                         }
 399                         }
 400                 }
 401
 402                 if ($abstract != "") {
 403                         $post["text"] = $abstract;
 404
 405                         if ($post["type"] == "text") {
 406                                 $post["type"] = "link";
 407                                 $post["url"] = $b["plink"];
 408                         }
 409                 }
 410
 411                 $html = BBCode::convert($post["text"].$post["after"], false, $htmlmode);
 412                 $msg = html2plain($html, 0, true);
 413                 $msg = trim(html_entity_decode($msg, ENT_QUOTES, 'UTF-8'));
 414
 415                 $link = "";
 416                 if ($includedlinks) {
 417                         if ($post["type"] == "link") {
 418                                 $link = $post["url"];
 419                         } elseif ($post["type"] == "text") {
 420                                 $link = $post["url"];
 421                         } elseif ($post["type"] == "video") {
 422                                 $link = $post["url"];
 423                         } elseif ($post["type"] == "photo") {
 424                                 $link = $post["image"];
 425                         }
 426
 427                         if (($msg == "") && isset($post["title"])) {
 428                                 $msg = trim($post["title"]);
 429                         }
 430
 431                         if (($msg == "") && isset($post["description"])) {
 432                                 $msg = trim($post["description"]);
 433                         }
 434
 435                         // If the link is already contained in the post, then it neeedn't to be added again
 436                         // But: if the link is beyond the limit, then it has to be added.
 437                         if (($link != "") && strstr($msg, $link)) {
 438                                 $pos = strpos($msg, $link);
 439
 440                                 // Will the text be shortened in the link?
 441                                 // Or is the link the last item in the post?
 442                                 if (($limit > 0) && ($pos < $limit) && (($pos + 23 > $limit) || ($pos + strlen($link) == strlen($msg)))) {
 443                                         $msg = trim(str_replace($link, "", $msg));
 444                                 } elseif (($limit == 0) || ($pos < $limit)) {
 445                                         // The limit has to be increased since it will be shortened - but not now
 446                                         // Only do it with Twitter (htmlmode = 8)
 447                                         if (($limit > 0) && (strlen($link) > 23) && ($htmlmode == 8)) {
 448                                                 $limit = $limit - 23 + strlen($link);
 449                                         }
 450
 451                                         $link = "";
 452
 453                                         if ($post["type"] == "text") {
 454                                                 unset($post["url"]);
 455                                         }
 456                                 }
 457                         }
 458                 }
 459
 460                 if ($limit > 0) {
 461                         // Reduce multiple spaces
 462                         // When posted to a network with limited space, we try to gain space where possible
 463                         while (strpos($msg, "  ") !== false) {
 464                                 $msg = str_replace("  ", " ", $msg);
 465                         }
 466
 467                         // Twitter is using its own limiter, so we always assume that shortened links will have this length
 468                         if (iconv_strlen($link, "UTF-8") > 0) {
 469                                 $limit = $limit - 23;
 470                         }
 471
 472                         if (iconv_strlen($msg, "UTF-8") > $limit) {
 473                                 if (($post["type"] == "text") && isset($post["url"])) {
 474                                         $post["url"] = $b["plink"];
 475                                 } elseif (!isset($post["url"])) {
 476                                         $limit = $limit - 23;
 477                                         $post["url"] = $b["plink"];
 478                                 // Which purpose has this line? It is now uncommented, but left as a reminder
 479                                 //} elseif (strpos($b["body"], "[share") !== false) {
 480                                 //      $post["url"] = $b["plink"];
 481                                 } elseif (PConfig::get($b["uid"], "system", "no_intelligent_shortening")) {
 482                                         $post["url"] = $b["plink"];
 483                                 }
 484                                 $msg = Plaintext::shorten($msg, $limit);
 485                         }
 486                 }
 487
 488                 $post["text"] = trim($msg);
 489
 490                 return($post);
 491         }
 492
 493         public static function scaleExternalImages($srctext, $include_link = true, $scale_replace = false)
 494         {
 495                 // Suppress "view full size"
 496                 if (intval(Config::get('system', 'no_view_full_size'))) {
 497                         $include_link = false;
 498                 }
 499
 500                 // Picture addresses can contain special characters
 501                 $s = htmlspecialchars_decode($srctext);
 502
 503                 $matches = null;
 504                 $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism', $s, $matches, PREG_SET_ORDER);
 505                 if ($c) {
 506                         foreach ($matches as $mtch) {
 507                                 logger('scale_external_image: ' . $mtch[1]);
 508
 509                                 $hostname = str_replace('www.', '', substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3));
 510                                 if (stristr($mtch[1], $hostname)) {
 511                                         continue;
 512                                 }
 513
 514                                 // $scale_replace, if passed, is an array of two elements. The
 515                                 // first is the name of the full-size image. The second is the
 516                                 // name of a remote, scaled-down version of the full size image.
 517                                 // This allows Friendica to display the smaller remote image if
 518                                 // one exists, while still linking to the full-size image
 519                                 if ($scale_replace) {
 520                                         $scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
 521                                 } else {
 522                                         $scaled = $mtch[1];
 523                                 }
 524                                 $i = Network::fetchUrl($scaled);
 525                                 if (!$i) {
 526                                         return $srctext;
 527                                 }
 528
 529                                 // guess mimetype from headers or filename
 530                                 $type = Image::guessType($mtch[1], true);
 531
 532                                 if ($i) {
 533                                         $Image = new Image($i, $type);
 534                                         if ($Image->isValid()) {
 535                                                 $orig_width = $Image->getWidth();
 536                                                 $orig_height = $Image->getHeight();
 537
 538                                                 if ($orig_width > 640 || $orig_height > 640) {
 539                                                         $Image->scaleDown(640);
 540                                                         $new_width = $Image->getWidth();
 541                                                         $new_height = $Image->getHeight();
 542                                                         logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
 543                                                         $s = str_replace(
 544                                                                 $mtch[0],
 545                                                                 '[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
 546                                                                 . "\n" . (($include_link)
 547                                                                         ? '[url=' . $mtch[1] . ']' . L10n::t('view full size') . '[/url]' . "\n"
 548                                                                         : ''),
 549                                                                 $s
 550                                                         );
 551                                                         logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
 552                                                 }
 553                                         }
 554                                 }
 555                         }
 556                 }
 557
 558                 // replace the special char encoding
 559                 $s = htmlspecialchars($s, ENT_NOQUOTES, 'UTF-8');
 560                 return $s;
 561         }
 562
 563         /**
 564          * The purpose of this function is to apply system message length limits to
 565          * imported messages without including any embedded photos in the length
 566          *
 567          * @brief Truncates imported message body string length to max_import_size
 568          * @param string $body
 569          * @return string
 570          */
 571         public static function limitBodySize($body)
 572         {
 573                 $maxlen = get_max_import_size();
 574
 575                 // If the length of the body, including the embedded images, is smaller
 576                 // than the maximum, then don't waste time looking for the images
 577                 if ($maxlen && (strlen($body) > $maxlen)) {
 578
 579                         logger('the total body length exceeds the limit', LOGGER_DEBUG);
 580
 581                         $orig_body = $body;
 582                         $new_body = '';
 583                         $textlen = 0;
 584
 585                         $img_start = strpos($orig_body, '[img');
 586                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 587                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 588                         while (($img_st_close !== false) && ($img_end !== false)) {
 589
 590                                 $img_st_close++; // make it point to AFTER the closing bracket
 591                                 $img_end += $img_start;
 592                                 $img_end += strlen('[/img]');
 593
 594                                 if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
 595                                         // This is an embedded image
 596
 597                                         if (($textlen + $img_start) > $maxlen) {
 598                                                 if ($textlen < $maxlen) {
 599                                                         logger('the limit happens before an embedded image', LOGGER_DEBUG);
 600                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 601                                                         $textlen = $maxlen;
 602                                                 }
 603                                         } else {
 604                                                 $new_body = $new_body . substr($orig_body, 0, $img_start);
 605                                                 $textlen += $img_start;
 606                                         }
 607
 608                                         $new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start);
 609                                 } else {
 610
 611                                         if (($textlen + $img_end) > $maxlen) {
 612                                                 if ($textlen < $maxlen) {
 613                                                         logger('the limit happens before the end of a non-embedded image', LOGGER_DEBUG);
 614                                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 615                                                         $textlen = $maxlen;
 616                                                 }
 617                                         } else {
 618                                                 $new_body = $new_body . substr($orig_body, 0, $img_end);
 619                                                 $textlen += $img_end;
 620                                         }
 621                                 }
 622                                 $orig_body = substr($orig_body, $img_end);
 623
 624                                 if ($orig_body === false) {
 625                                         // in case the body ends on a closing image tag
 626                                         $orig_body = '';
 627                                 }
 628
 629                                 $img_start = strpos($orig_body, '[img');
 630                                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
 631                                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
 632                         }
 633
 634                         if (($textlen + strlen($orig_body)) > $maxlen) {
 635                                 if ($textlen < $maxlen) {
 636                                         logger('the limit happens after the end of the last image', LOGGER_DEBUG);
 637                                         $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen);
 638                                 }
 639                         } else {
 640                                 logger('the text size with embedded images extracted did not violate the limit', LOGGER_DEBUG);
 641                                 $new_body = $new_body . $orig_body;
 642                         }
 643
 644                         return $new_body;
 645                 } else {
 646                         return $body;
 647                 }
 648         }
 649
 650         /**
 651          * Processes [attachment] tags
 652          *
 653          * Note: Can produce a [bookmark] tag in the returned string
 654          *
 655          * @brief Processes [attachment] tags
 656          * @param string $return
 657          * @param bool|int $simplehtml
 658          * @param bool $tryoembed
 659          * @return string
 660          */
 661         private static function convertAttachment($return, $simplehtml = false, $tryoembed = true)
 662         {
 663                 $data = self::getAttachmentData($return);
 664                 if (!$data) {
 665                         return $return;
 666                 }
 667
 668                 if (isset($data["title"])) {
 669                         $data["title"] = strip_tags($data["title"]);
 670                         $data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
 671                 }
 672
 673                 if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && ($data["image"] != "")) {
 674                         $data["preview"] = $data["image"];
 675                         $data["image"] = "";
 676                 }
 677
 678                 $return = '';
 679                 if ($simplehtml == 7) {
 680                         $return = self::convertUrlForMastodon($data["url"]);
 681                 } elseif (($simplehtml != 4) && ($simplehtml != 0)) {
 682                         $return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
 683                 } else {
 684                         try {
 685                                 if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
 686                                         $return = OEmbed::getHTML($data['url'], $data['title']);
 687                                 } else {
 688                                         throw new Exception('OEmbed is disabled for this attachment.');
 689                                 }
 690                         } catch (Exception $e) {
 691                                 if ($simplehtml != 4) {
 692                                         $return = sprintf('<div class="type-%s">', $data["type"]);
 693                                 }
 694
 695                                 if ($data["image"] != "") {
 696                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], proxy_url($data["image"]), $data["title"]);
 697                                 } elseif ($data["preview"] != "") {
 698                                         $return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], proxy_url($data["preview"]), $data["title"]);
 699                                 }
 700
 701                                 if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
 702                                         $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"]);
 703                                 } else {
 704                                         $return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
 705                                 }
 706
 707                                 if ($data["description"] != "" && $data["description"] != $data["title"]) {
 708                                         $return .= sprintf('<blockquote>%s</blockquote>', trim(BBCode::convert($data["description"])));
 709                                 }
 710
 711                                 if ($data["type"] == "link") {
 712                                         $return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
 713                                 }
 714
 715                                 if ($simplehtml != 4) {
 716                                         $return .= '</div>';
 717                                 }
 718                         }
 719                 }
 720
 721                 return trim($data["text"] . ' ' . $return . ' ' . $data["after"]);
 722         }
 723
 724         public static function removeShareInformation($Text, $plaintext = false, $nolink = false)
 725         {
 726                 $data = self::getAttachmentData($Text);
 727
 728                 if (!$data) {
 729                         return $Text;
 730                 } elseif ($nolink) {
 731                         return $data["text"] . $data["after"];
 732                 }
 733
 734                 $title = htmlentities($data["title"], ENT_QUOTES, 'UTF-8', false);
 735                 $text = htmlentities($data["text"], ENT_QUOTES, 'UTF-8', false);
 736                 if ($plaintext || (($title != "") && strstr($text, $title))) {
 737                         $data["title"] = $data["url"];
 738                 } elseif (($text != "") && strstr($title, $text)) {
 739                         $data["text"] = $data["title"];
 740                         $data["title"] = $data["url"];
 741                 }
 742
 743                 if (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
 744                         return $data["title"] . $data["after"];
 745                 }
 746
 747                 // If the link already is included in the post, don't add it again
 748                 if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
 749                         return $data["text"] . $data["after"];
 750                 }
 751
 752                 $text = $data["text"];
 753
 754                 if (($data["url"] != "") && ($data["title"] != "")) {
 755                         $text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
 756                 } elseif (($data["url"] != "")) {
 757                         $text .= "\n[url]" . $data["url"] . "[/url]";
 758                 }
 759
 760                 return $text . "\n" . $data["after"];
 761         }
 762
 763         private static function cleanCss($input)
 764         {
 765                 $cleaned = "";
 766
 767                 $input = strtolower($input);
 768
 769                 for ($i = 0; $i < strlen($input); $i++) {
 770                         $char = substr($input, $i, 1);
 771
 772                         if (($char >= "a") && ($char <= "z")) {
 773                                 $cleaned .= $char;
 774                         }
 775
 776                         if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
 777                                 $cleaned .= $char;
 778                         }
 779                 }
 780
 781                 return $cleaned;
 782         }
 783
 784         /**
 785          * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 786          *
 787          * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 788          * @param array $match Array with the matching values
 789          * @return string reformatted link including HTML codes
 790          */
 791         private static function convertUrlForMastodonCallback($match)
 792         {
 793                 $url = $match[1];
 794
 795                 if (isset($match[2]) && ($match[1] != $match[2])) {
 796                         return $match[0];
 797                 }
 798
 799                 $parts = parse_url($url);
 800                 if (!isset($parts['scheme'])) {
 801                         return $match[0];
 802                 }
 803
 804                 return self::convertUrlForMastodon($url);
 805         }
 806
 807         /**
 808          * @brief Converts [url] BBCodes in a format that looks fine on Mastodon and GNU Social.
 809          * @param string $url URL that is about to be reformatted
 810          * @return string reformatted link including HTML codes
 811          */
 812         private static function convertUrlForMastodon($url)
 813         {
 814                 $parts = parse_url($url);
 815                 $scheme = $parts['scheme'] . '://';
 816                 $styled_url = str_replace($scheme, '', $url);
 817
 818                 $html = '<a href="%s" class="attachment" rel="nofollow noopener" target="_blank">' .
 819                         '<span class="invisible">%s</span>';
 820
 821                 if (strlen($styled_url) > 30) {
 822                         $html .= '<span class="ellipsis">%s</span>' .
 823                                 '<span class="invisible">%s</span></a>';
 824
 825                         $ellipsis = substr($styled_url, 0, 30);
 826                         $rest = substr($styled_url, 30);
 827                         return sprintf($html, $url, $scheme, $ellipsis, $rest);
 828                 } else {
 829                         $html .= '%s</a>';
 830                         return sprintf($html, $url, $scheme, $styled_url);
 831                 }
 832         }
 833
 834         /**
 835          * @brief Shortens [url] BBCodes in a format that looks less ugly than the full address. (callback function)
 836          * @param array $match Array with the matching values
 837          * @return string reformatted link including HTML codes
 838          */
 839         private static function shortenVisibleUrlCallback($match)
 840         {
 841                 $url = $match[1];
 842
 843                 if (isset($match[2]) && ($match[1] != $match[2])) {
 844                         return $match[0];
 845                 }
 846
 847                 $parts = parse_url($url);
 848                 if (!isset($parts['scheme'])) {
 849                         return $match[0];
 850                 }
 851
 852                 return self::shortenVisibleUrl($url);
 853         }
 854
 855         /**
 856          * @brief Shortens [url] BBCodes in a format that looks less ugly than the full address.
 857          * @param string $url URL that is about to be reformatted
 858          * @return string reformatted link including HTML codes
 859          */
 860         private static function shortenVisibleUrl($url)
 861         {
 862                 $parts = parse_url($url);
 863                 $scheme = $parts['scheme'] . '://';
 864                 $styled_url = str_replace($scheme, '', $url);
 865
 866 //              Currently deactivated, due to preview problems inside of Diaspora
 867 //              if (strlen($styled_url) > 30) {
 868 //                      $styled_url = substr($styled_url, 0, 30) . "…";
 869 //              }
 870
 871                 $html = '<a href="%s" target="_blank">%s</a>';
 872
 873                 return sprintf($html, $url, $styled_url);
 874         }
 875
 876         /*
 877          * [noparse][i]italic[/i][/noparse] turns into
 878          * [noparse][ i ]italic[ /i ][/noparse],
 879          * to hide them from parser.
 880          */
 881         private static function escapeNoparseCallback($match)
 882         {
 883                 $whole_match = $match[0];
 884                 $captured = $match[1];
 885                 $spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured);
 886                 $new_str = str_replace($captured, $spacefied, $whole_match);
 887                 return $new_str;
 888         }
 889
 890         /*
 891          * The previously spacefied [noparse][ i ]italic[ /i ][/noparse],
 892          * now turns back and the [noparse] tags are trimed
 893          * returning [i]italic[/i]
 894          */
 895         private static function unescapeNoparseCallback($match)
 896         {
 897                 $captured = $match[1];
 898                 $unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
 899                 return $unspacefied;
 900         }
 901
 902         /**
 903          * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first
 904          * occurrences
 905          *
 906          * @param string $text        Text to search
 907          * @param string $name        Tag name
 908          * @param int    $occurrences Number of first occurrences to skip
 909          * @return boolean|array
 910          */
 911         public static function getTagPosition($text, $name, $occurrences = 0)
 912         {
 913                 if ($occurrences < 0) {
 914                         $occurrences = 0;
 915                 }
 916
 917                 $start_open = -1;
 918                 for ($i = 0; $i <= $occurrences; $i++) {
 919                         if ($start_open !== false) {
 920                                 $start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags
 921                         }
 922                 }
 923
 924                 if ($start_open === false) {
 925                         return false;
 926                 }
 927
 928                 $start_equal = strpos($text, '=', $start_open);
 929                 $start_close = strpos($text, ']', $start_open);
 930
 931                 if ($start_close === false) {
 932                         return false;
 933                 }
 934
 935                 $start_close++;
 936
 937                 $end_open = strpos($text, '[/' . $name . ']', $start_close);
 938
 939                 if ($end_open === false) {
 940                         return false;
 941                 }
 942
 943                 $res = [
 944                         'start' => [
 945                                 'open' => $start_open,
 946                                 'close' => $start_close
 947                         ],
 948                         'end' => [
 949                                 'open' => $end_open,
 950                                 'close' => $end_open + strlen('[/' . $name . ']')
 951                         ],
 952                 ];
 953
 954                 if ($start_equal !== false) {
 955                         $res['start']['equal'] = $start_equal + 1;
 956                 }
 957
 958                 return $res;
 959         }
 960
 961         /**
 962          * Performs a preg_replace within the boundaries of all named BBCode tags in a text
 963          *
 964          * @param type $pattern Preg pattern string
 965          * @param type $replace Preg replace string
 966          * @param type $name    BBCode tag name
 967          * @param type $text    Text to search
 968          * @return string
 969          */
 970         public static function pregReplaceInTag($pattern, $replace, $name, $text)
 971         {
 972                 $occurrences = 0;
 973                 $pos = self::getTagPosition($text, $name, $occurrences);
 974                 while ($pos !== false && $occurrences++ < 1000) {
 975                         $start = substr($text, 0, $pos['start']['open']);
 976                         $subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
 977                         $end = substr($text, $pos['end']['close']);
 978                         if ($end === false) {
 979                                 $end = '';
 980                         }
 981
 982                         $subject = preg_replace($pattern, $replace, $subject);
 983                         $text = $start . $subject . $end;
 984
 985                         $pos = self::getTagPosition($text, $name, $occurrences);
 986                 }
 987
 988                 return $text;
 989         }
 990
 991         private static function extractImagesFromItemBody($body)
 992         {
 993                 $saved_image = [];
 994                 $orig_body = $body;
 995                 $new_body = '';
 996
 997                 $cnt = 0;
 998                 $img_start = strpos($orig_body, '[img');
 999                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1000                 $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
1001                 while (($img_st_close !== false) && ($img_end !== false)) {
1002                         $img_st_close++; // make it point to AFTER the closing bracket
1003                         $img_end += $img_start;
1004
1005                         if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
1006                                 // This is an embedded image
1007                                 $saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
1008                                 $new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]';
1009
1010                                 $cnt++;
1011                         } else {
1012                                 $new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));
1013                         }
1014
1015                         $orig_body = substr($orig_body, $img_end + strlen('[/img]'));
1016
1017                         if ($orig_body === false) {
1018                                 // in case the body ends on a closing image tag
1019                                 $orig_body = '';
1020                         }
1021
1022                         $img_start = strpos($orig_body, '[img');
1023                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1024                         $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
1025                 }
1026
1027                 $new_body = $new_body . $orig_body;
1028
1029                 return ['body' => $new_body, 'images' => $saved_image];
1030         }
1031
1032         private static function interpolateSavedImagesIntoItemBody($body, array $images)
1033         {
1034                 $newbody = $body;
1035
1036                 $cnt = 0;
1037                 foreach ($images as $image) {
1038                         // We're depending on the property of 'foreach' (specified on the PHP website) that
1039                         // it loops over the array starting from the first element and going sequentially
1040                         // to the last element
1041                         $newbody = str_replace('[$#saved_image' . $cnt . '#$]',
1042                                 '<img src="' . proxy_url($image) . '" alt="' . L10n::t('Image/photo') . '" />', $newbody);
1043                         $cnt++;
1044                 }
1045
1046                 return $newbody;
1047         }
1048
1049         /**
1050          * Processes [share] tags
1051          *
1052          * Note: Can produce a [bookmark] tag in the output
1053          *
1054          * @brief Processes [share] tags
1055          * @param array    $share      preg_match_callback result array
1056          * @param bool|int $simplehtml
1057          * @return string
1058          */
1059         private static function convertShare($share, $simplehtml)
1060         {
1061                 $attributes = $share[2];
1062
1063                 $author = "";
1064                 preg_match("/author='(.*?)'/ism", $attributes, $matches);
1065                 if (x($matches, 1)) {
1066                         $author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
1067                 }
1068
1069                 preg_match('/author="(.*?)"/ism', $attributes, $matches);
1070                 if (x($matches, 1)) {
1071                         $author = $matches[1];
1072                 }
1073
1074                 $profile = "";
1075                 preg_match("/profile='(.*?)'/ism", $attributes, $matches);
1076                 if (x($matches, 1)) {
1077                         $profile = $matches[1];
1078                 }
1079
1080                 preg_match('/profile="(.*?)"/ism', $attributes, $matches);
1081                 if (x($matches, 1)) {
1082                         $profile = $matches[1];
1083                 }
1084
1085                 $avatar = "";
1086                 preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
1087                 if (x($matches, 1)) {
1088                         $avatar = $matches[1];
1089                 }
1090
1091                 preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
1092                 if (x($matches, 1)) {
1093                         $avatar = $matches[1];
1094                 }
1095
1096                 $link = "";
1097                 preg_match("/link='(.*?)'/ism", $attributes, $matches);
1098                 if (x($matches, 1)) {
1099                         $link = $matches[1];
1100                 }
1101
1102                 preg_match('/link="(.*?)"/ism', $attributes, $matches);
1103                 if (x($matches, 1)) {
1104                         $link = $matches[1];
1105                 }
1106
1107                 $posted = "";
1108
1109                 preg_match("/posted='(.*?)'/ism", $attributes, $matches);
1110                 if (x($matches, 1)) {
1111                         $posted = $matches[1];
1112                 }
1113
1114                 preg_match('/posted="(.*?)"/ism', $attributes, $matches);
1115                 if (x($matches, 1)) {
1116                         $posted = $matches[1];
1117                 }
1118
1119                 // We only call this so that a previously unknown contact can be added.
1120                 // This is important for the function "Model\Contact::getDetailsByURL()".
1121                 // This function then can fetch an entry from the contact table.
1122                 Contact::getIdForURL($profile, 0, true);
1123
1124                 $data = Contact::getDetailsByURL($profile);
1125
1126                 if (x($data, "name") && x($data, "addr")) {
1127                         $userid_compact = $data["name"] . " (" . $data["addr"] . ")";
1128                 } else {
1129                         $userid_compact = Protocol::getAddrFromProfileUrl($profile, $author);
1130                 }
1131
1132                 if (x($data, "addr")) {
1133                         $userid = $data["addr"];
1134                 } else {
1135                         $userid = Protocol::formatMention($profile, $author);
1136                 }
1137
1138                 if (x($data, "name")) {
1139                         $author = $data["name"];
1140                 }
1141
1142                 if (x($data, "micro")) {
1143                         $avatar = $data["micro"];
1144                 }
1145
1146                 $preshare = trim($share[1]);
1147                 if ($preshare != "") {
1148                         $preshare .= "<br />";
1149                 }
1150
1151                 switch ($simplehtml) {
1152                         case 1:
1153                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' <a href="' . $profile . '">' . $userid . "</a>: <br />»" . $share[3] . "«";
1154                                 break;
1155                         case 2:
1156                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1157                                 break;
1158                         case 3: // Diaspora
1159                                 $headline = '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';
1160
1161                                 $text = trim($share[1]);
1162
1163                                 if ($text != "") {
1164                                         $text .= "<hr />";
1165                                 }
1166
1167                                 if (stripos(normalise_link($link), 'http://twitter.com/') === 0) {
1168                                         $text .= '<br /><a href="' . $link . '">' . $link . '</a>';
1169                                 } else {
1170                                         $text .= $headline . '<blockquote>' . trim($share[3]) . "</blockquote><br />";
1171
1172                                         if ($link != "") {
1173                                                 $text .= '<br /><a href="' . $link . '">[l]</a>';
1174                                         }
1175                                 }
1176
1177                                 break;
1178                         case 4:
1179                                 $headline = '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
1180                                 $headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
1181                                 $headline .= ":</b><br />";
1182
1183                                 $text = trim($share[1]);
1184
1185                                 if ($text != "") {
1186                                         $text .= "<hr />";
1187                                 }
1188
1189                                 $text .= $headline . '<blockquote class="shared_content">' . trim($share[3]) . "</blockquote><br />";
1190
1191                                 break;
1192                         case 5:
1193                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1194                                 break;
1195                         case 6: // app.net
1196                                 $text = $preshare . "&gt;&gt; @" . $userid_compact . ": <br />" . $share[3];
1197                                 break;
1198                         case 7: // statusnet/GNU Social
1199                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . " @" . $userid_compact . ": " . $share[3];
1200                                 break;
1201                         case 8: // twitter
1202                                 $text = $preshare . "RT @" . $userid_compact . ": " . $share[3];
1203                                 break;
1204                         case 9: // Google+/Facebook
1205                                 $text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
1206
1207                                 if ($link != "") {
1208                                         $text .= "<br /><br />" . $link;
1209                                 }
1210                                 break;
1211                         default:
1212                                 // Transforms quoted tweets in rich attachments to avoid nested tweets
1213                                 if (stripos(normalise_link($link), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($link)) {
1214                                         try {
1215                                                 $oembed = OEmbed::getHTML($link, $preshare);
1216                                         } catch (Exception $e) {
1217                                                 $oembed = sprintf('[bookmark=%s]%s[/bookmark]', $link, $preshare);
1218                                         }
1219
1220                                         $text = $preshare . $oembed;
1221                                 } else {
1222                                         $text = trim($share[1]) . "\n";
1223
1224                                         $avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);
1225
1226                                         $tpl = get_markup_template('shared_content.tpl');
1227                                         $text .= replace_macros($tpl, [
1228                                                 '$profile' => $profile,
1229                                                 '$avatar' => $avatar,
1230                                                 '$author' => $author,
1231                                                 '$link' => $link,
1232                                                 '$posted' => $posted,
1233                                                 '$content' => trim($share[3])
1234                                         ]);
1235                                 }
1236                                 break;
1237                 }
1238
1239                 return $text;
1240         }
1241
1242         private static function removePictureLinksCallback($match)
1243         {
1244                 $text = Cache::get($match[1]);
1245
1246                 if (is_null($text)) {
1247                         $a = get_app();
1248
1249                         $stamp1 = microtime(true);
1250
1251                         $ch = @curl_init($match[1]);
1252                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1253                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1254                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
1255                         @curl_exec($ch);
1256                         $curl_info = @curl_getinfo($ch);
1257
1258                         $a->save_timestamp($stamp1, "network");
1259
1260                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1261                                 $text = "[url=" . $match[1] . "]" . $match[1] . "[/url]";
1262                         } else {
1263                                 $text = "[url=" . $match[2] . "]" . $match[2] . "[/url]";
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                                         $attr = [];
1274
1275                                         if ($node->attributes->length) {
1276                                                 foreach ($node->attributes as $attribute) {
1277                                                         $attr[$attribute->name] = $attribute->value;
1278                                                 }
1279                                         }
1280
1281                                         if (strtolower($attr["name"]) == "twitter:image") {
1282                                                 $text = "[url=" . $attr["content"] . "]" . $attr["content"] . "[/url]";
1283                                         }
1284                                 }
1285                         }
1286                         Cache::set($match[1], $text);
1287                 }
1288
1289                 return $text;
1290         }
1291
1292         private static function expandLinksCallback($match)
1293         {
1294                 if (($match[3] == "") || ($match[2] == $match[3]) || stristr($match[2], $match[3])) {
1295                         return ($match[1] . "[url]" . $match[2] . "[/url]");
1296                 } else {
1297                         return ($match[1] . $match[3] . " [url]" . $match[2] . "[/url]");
1298                 }
1299         }
1300
1301         private static function cleanPictureLinksCallback($match)
1302         {
1303                 $text = Cache::get($match[1]);
1304
1305                 if (is_null($text)) {
1306                         $a = get_app();
1307
1308                         $stamp1 = microtime(true);
1309
1310                         $ch = @curl_init($match[1]);
1311                         @curl_setopt($ch, CURLOPT_NOBODY, true);
1312                         @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1313                         @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
1314                         @curl_exec($ch);
1315                         $curl_info = @curl_getinfo($ch);
1316
1317                         $a->save_timestamp($stamp1, "network");
1318
1319                         // if its a link to a picture then embed this picture
1320                         if (substr($curl_info["content_type"], 0, 6) == "image/") {
1321                                 $text = "[img]" . $match[1] . "[/img]";
1322                         } else {
1323                                 $text = "[img]" . $match[2] . "[/img]";
1324
1325                                 // if its not a picture then look if its a page that contains a picture link
1326                                 $body = Network::fetchUrl($match[1]);
1327
1328                                 $doc = new DOMDocument();
1329                                 @$doc->loadHTML($body);
1330                                 $xpath = new DomXPath($doc);
1331                                 $list = $xpath->query("//meta[@name]");
1332                                 foreach ($list as $node) {
1333                                         $attr = [];
1334                                         if ($node->attributes->length) {
1335                                                 foreach ($node->attributes as $attribute) {
1336                                                         $attr[$attribute->name] = $attribute->value;
1337                                                 }
1338                                         }
1339
1340                                         if (strtolower($attr["name"]) == "twitter:image") {
1341                                                 $text = "[img]" . $attr["content"] . "[/img]";
1342                                         }
1343                                 }
1344                         }
1345                         Cache::set($match[1], $text);
1346                 }
1347
1348                 return $text;
1349         }
1350
1351         public static function cleanPictureLinks($text)
1352         {
1353                 $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
1354                 return $return;
1355         }
1356
1357         private static function textHighlightCallback($match)
1358         {
1359                 if (in_array(strtolower($match[1]),
1360                                 ['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
1361                                 'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh'])
1362                 ) {
1363                         return text_highlight($match[2], strtolower($match[1]));
1364                 }
1365                 return $match[0];
1366         }
1367
1368         /**
1369          * @brief Converts a BBCode message to HTML message
1370          *
1371          * BBcode 2 HTML was written by WAY2WEB.net
1372          * extended to work with Mistpark/Friendica - Mike Macgirvin
1373          *
1374          * Simple HTML values meaning:
1375          * - 0: Friendica display
1376          * - 1: Unused
1377          * - 2: Used for Facebook, Google+, Windows Phone push, Friendica API
1378          * - 3: Used before converting to Markdown in bb2diaspora.php
1379          * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr
1380          * - 5: Unused
1381          * - 6: Used for Appnet
1382          * - 7: Used for dfrn, OStatus
1383          * - 8: Used for WP backlink text setting
1384          *
1385          * @param string $text
1386          * @param bool   $try_oembed
1387          * @param int    $simple_html
1388          * @param bool   $for_plaintext
1389          * @return string
1390          */
1391         public static function convert($text, $try_oembed = true, $simple_html = false, $for_plaintext = false)
1392         {
1393                 $a = get_app();
1394
1395                 /*
1396                  * preg_match_callback function to replace potential Oembed tags with Oembed content
1397                  *
1398                  * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag]
1399                  * $match[1] = $url
1400                  * $match[2] = $title or absent
1401                  */
1402                 $try_oembed_callback = function ($match)
1403                 {
1404                         $url = $match[1];
1405                         $title = defaults($match, 2, null);
1406
1407                         try {
1408                                 $return = OEmbed::getHTML($url, $title);
1409                         } catch (Exception $ex) {
1410                                 $return = $match[0];
1411                         }
1412
1413                         return $return;
1414                 };
1415
1416                 // Hide all [noparse] contained bbtags by spacefying them
1417                 // POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?
1418
1419                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::escapeNoparseCallback', $text);
1420                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::escapeNoparseCallback', $text);
1421                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::escapeNoparseCallback', $text);
1422
1423                 // Remove the abstract element. It is a non visible element.
1424                 $text = self::stripAbstract($text);
1425
1426                 // Move all spaces out of the tags
1427                 $text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $text);
1428                 $text = preg_replace("/(\s*)\[\/(\w*)\]/ism", '[/$2]$1', $text);
1429
1430                 // Extract the private images which use data urls since preg has issues with
1431                 // large data sizes. Stash them away while we do bbcode conversion, and then put them back
1432                 // in after we've done all the regex matching. We cannot use any preg functions to do this.
1433
1434                 $extracted = self::extractImagesFromItemBody($text);
1435                 $text = $extracted['body'];
1436                 $saved_image = $extracted['images'];
1437
1438                 // If we find any event code, turn it into an event.
1439                 // After we're finished processing the bbcode we'll
1440                 // replace all of the event code with a reformatted version.
1441
1442                 $ev = bbtoevent($text);
1443
1444                 // Replace any html brackets with HTML Entities to prevent executing HTML or script
1445                 // Don't use strip_tags here because it breaks [url] search by replacing & with amp
1446
1447                 $text = str_replace("<", "&lt;", $text);
1448                 $text = str_replace(">", "&gt;", $text);
1449
1450                 // remove some newlines before the general conversion
1451                 $text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $text);
1452                 $text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $text);
1453
1454                 $text = preg_replace("/\n\[code\]/ism", "[code]", $text);
1455                 $text = preg_replace("/\[\/code\]\n/ism", "[/code]", $text);
1456
1457                 // when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems
1458                 if (!$try_oembed) {
1459                         $text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text);
1460                 }
1461
1462                 // Check for [code] text here, before the linefeeds are messed with.
1463                 // The highlighter will unescape and re-escape the content.
1464                 if (strpos($text, '[code=') !== false) {
1465                         $text = preg_replace_callback("/\[code=(.*?)\](.*?)\[\/code\]/ism", 'self::textHighlightCallback', $text);
1466                 }
1467                 // Convert new line chars to html <br /> tags
1468
1469                 // nlbr seems to be hopelessly messed up
1470                 //      $Text = nl2br($Text);
1471
1472                 // We'll emulate it.
1473
1474                 $text = trim($text);
1475                 $text = str_replace("\r\n", "\n", $text);
1476
1477                 // removing multiplicated newlines
1478                 if (Config::get("system", "remove_multiplicated_lines")) {
1479                         $search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n",
1480                                         "\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"];
1481                         $replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[ul]", "[/ul]", "\n[share ", "[/attachment]",
1482                                         "[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"];
1483                         do {
1484                                 $oldtext = $text;
1485                                 $text = str_replace($search, $replace, $text);
1486                         } while ($oldtext != $text);
1487                 }
1488
1489                 // Set up the parameters for a URL search string
1490                 $URLSearchString = "^\[\]";
1491                 // Set up the parameters for a MAIL search string
1492                 $MAILSearchString = $URLSearchString;
1493
1494                 // if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
1495                 if (!$for_plaintext) {
1496                         // Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
1497                         // Currently disabled, since the function is too greedy
1498                         // $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
1499                         $autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
1500                         $text = preg_replace($autolink_regex, '$1[url]$2[/url]', $text);
1501                         if ($simple_html == 7) {
1502                                 $text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForMastodonCallback', $text);
1503                                 $text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'self::convertUrlForMastodonCallback', $text);
1504                         } else {
1505                                 $text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'self::shortenVisibleUrlCallback', $text);
1506                                 $text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'self::shortenVisibleUrlCallback', $text);
1507                         }
1508                 } else {
1509                         $text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $text);
1510                         $text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::removePictureLinksCallback', $text);
1511                 }
1512
1513
1514                 // Handle attached links or videos
1515                 $text = self::convertAttachment($text, $simple_html, $try_oembed);
1516
1517                 $text = str_replace(["\r","\n"], ['<br />', '<br />'], $text);
1518
1519                 // Remove all hashtag addresses
1520                 if ((!$try_oembed || $simple_html) && !in_array($simple_html, [3, 7])) {
1521                         $text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $text);
1522                 } elseif ($simple_html == 3) {
1523                         // The ! is converted to @ since Diaspora only understands the @
1524                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1525                                 '@<a href="$2">$3</a>',
1526                                 $text);
1527                 } elseif ($simple_html == 7) {
1528                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1529                                 '$1<span class="vcard"><a href="$2" class="url" title="$3"><span class="fn nickname mention">$3</span></a></span>',
1530                                 $text);
1531                 } elseif (!$simple_html) {
1532                         $text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1533                                 '$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
1534                                 $text);
1535                 }
1536
1537                 // Bookmarks in red - will be converted to bookmarks in friendica
1538                 $text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text);
1539                 $text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text);
1540                 $text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
1541                                         "[bookmark=$1]$2[/bookmark]", $text);
1542
1543                 if (in_array($simple_html, [2, 6, 7, 8, 9])) {
1544                         $text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "self::expandLinksCallback", $text);
1545                         //$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
1546                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$text);
1547                 }
1548
1549                 if ($simple_html == 5) {
1550                         $text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $text);
1551                 }
1552
1553                 // Perform URL Search
1554                 if ($try_oembed) {
1555                         $text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text);
1556                 }
1557
1558                 if ($simple_html == 5) {
1559                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $text);
1560                 } else {
1561                         $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text);
1562                 }
1563
1564                 // Handle Diaspora posts
1565                 $text = preg_replace_callback(
1566                         "&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
1567                         function ($match) {
1568                                 return "[url=" . System::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]";
1569                         }, $text
1570                 );
1571
1572                 // Server independent link to posts and comments
1573                 // See issue: https://github.com/diaspora/diaspora_federation/issues/75
1574                 $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
1575                 $text = preg_replace($expression, System::baseUrl()."/display/$1", $text);
1576
1577                 $text = preg_replace("/([#])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1578                                         '$1<a href="' . System::baseUrl() . '/search?tag=$3" class="tag" title="$3">$3</a>', $text);
1579
1580                 $text = preg_replace("/\[url\=([$URLSearchString]*)\]#(.*?)\[\/url\]/ism",
1581                                         '#<a href="' . System::baseUrl() . '/search?tag=$2" class="tag" title="$2">$2</a>', $text);
1582
1583                 $text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $text);
1584                 $text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1585                 //$Text = preg_replace("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
1586
1587                 // Red compatibility, though the link can't be authenticated on Friendica
1588                 $text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $text);
1589
1590
1591                 // we may need to restrict this further if it picks up too many strays
1592                 // link acct:user@host to a webfinger profile redirector
1593
1594                 $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);
1595
1596                 // Perform MAIL Search
1597                 $text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $text);
1598                 $text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $text);
1599
1600                 // leave open the posibility of [map=something]
1601                 // this is replaced in prepare_body() which has knowledge of the item location
1602
1603                 if (strpos($text, '[/map]') !== false) {
1604                         $text = preg_replace_callback(
1605                                 "/\[map\](.*?)\[\/map\]/ism",
1606                                 function ($match) {
1607                                         // the extra space in the following line is intentional
1608                                         // Whyyy? - @MrPetovan
1609                                         return str_replace($match[0], '<div class="map"  >' . Map::byLocation($match[1]) . '</div>', $match[0]);
1610                                 },
1611                                 $text
1612                         );
1613                 }
1614                 if (strpos($text, '[map=') !== false) {
1615                         $text = preg_replace_callback(
1616                                 "/\[map=(.*?)\]/ism",
1617                                 function ($match) {
1618                                         // the extra space in the following line is intentional
1619                                         // Whyyy? - @MrPetovan
1620                                         return str_replace($match[0], '<div class="map"  >' . Map::byCoordinates(str_replace('/', ' ', $match[1])) . '</div>', $match[0]);
1621                                 },
1622                                 $text
1623                         );
1624                 }
1625                 if (strpos($text, '[map]') !== false) {
1626                         $text = preg_replace("/\[map\]/", '<div class="map"></div>', $text);
1627                 }
1628
1629                 // Check for headers
1630                 $text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $text);
1631                 $text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $text);
1632                 $text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $text);
1633                 $text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $text);
1634                 $text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $text);
1635                 $text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $text);
1636
1637                 // Check for paragraph
1638                 $text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $text);
1639
1640                 // Check for bold text
1641                 $text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $text);
1642
1643                 // Check for Italics text
1644                 $text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $text);
1645
1646                 // Check for Underline text
1647                 $text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $text);
1648
1649                 // Check for strike-through text
1650                 $text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<strike>$1</strike>', $text);
1651
1652                 // Check for over-line text
1653                 $text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $text);
1654
1655                 // Check for colored text
1656                 $text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $text);
1657
1658                 // Check for sized text
1659                 // [size=50] --> font-size: 50px (with the unit).
1660                 $text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $text);
1661                 $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $text);
1662
1663                 // Check for centered text
1664                 $text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $text);
1665
1666                 // Check for list text
1667                 $text = str_replace("[*]", "<li>", $text);
1668
1669                 // Check for style sheet commands
1670                 $text = preg_replace_callback(
1671                         "(\[style=(.*?)\](.*?)\[\/style\])ism",
1672                         function ($match) {
1673                                 return "<span style=\"" . self::cleanCss($match[1]) . ";\">" . $match[2] . "</span>";
1674                         },
1675                         $text
1676                 );
1677
1678                 // Check for CSS classes
1679                 $text = preg_replace_callback(
1680                         "(\[class=(.*?)\](.*?)\[\/class\])ism",
1681                         function ($match) {
1682                                 return "<span class=\"" . self::cleanCss($match[1]) . "\">" . $match[2] . "</span>";
1683                         },
1684                         $text
1685                 );
1686
1687                 // handle nested lists
1688                 $endlessloop = 0;
1689
1690                 while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) ||
1691                            ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) ||
1692                            ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) ||
1693                            ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) {
1694                         $text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1695                         $text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $text);
1696                         $text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1697                         $text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $text);
1698                         $text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $text);
1699                         $text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $text);
1700                         $text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $text);
1701                         $text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $text);
1702                         $text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $text);
1703                         $text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $text);
1704                 }
1705
1706                 $text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $text);
1707                 $text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $text);
1708                 $text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $text);
1709                 $text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $text);
1710
1711                 $text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $text);
1712                 $text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $text);
1713
1714                 $text = str_replace('[hr]', '<hr />', $text);
1715
1716                 // This is actually executed in prepare_body()
1717
1718                 $text = str_replace('[nosmile]', '', $text);
1719
1720                 // Check for font change text
1721                 $text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $text);
1722
1723                 // Declare the format for [code] layout
1724
1725                 $CodeLayout = '<code>$1</code>';
1726                 // Check for [code] text
1727                 $text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $text);
1728
1729                 // Declare the format for [spoiler] layout
1730                 $SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';
1731
1732                 // Check for [spoiler] text
1733                 // handle nested quotes
1734                 $endlessloop = 0;
1735                 while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) {
1736                         $text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", "$SpoilerLayout", $text);
1737                 }
1738
1739                 // Check for [spoiler=Author] text
1740
1741                 $t_wrote = L10n::t('$1 wrote:');
1742
1743                 // handle nested quotes
1744                 $endlessloop = 0;
1745                 while ((strpos($text, "[/spoiler]")!== false)  && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
1746                         $text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
1747                                                  "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
1748                                                  $text);
1749                 }
1750
1751                 // Declare the format for [quote] layout
1752                 $QuoteLayout = '<blockquote>$1</blockquote>';
1753
1754                 // Check for [quote] text
1755                 // handle nested quotes
1756                 $endlessloop = 0;
1757                 while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) {
1758                         $text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text);
1759                 }
1760
1761                 // Check for [quote=Author] text
1762
1763                 $t_wrote = L10n::t('$1 wrote:');
1764
1765                 // handle nested quotes
1766                 $endlessloop = 0;
1767                 while ((strpos($text, "[/quote]")!== false)  && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) {
1768                         $text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism",
1769                                                  "<p><strong class=".'"author"'.">" . $t_wrote . "</strong></p><blockquote>$2</blockquote>",
1770                                                  $text);
1771                 }
1772
1773
1774                 // [img=widthxheight]image source[/img]
1775                 $text = preg_replace_callback(
1776                         "/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism",
1777                         function ($matches) {
1778                                 if (strpos($matches[3], "data:image/") === 0) {
1779                                         return $matches[0];
1780                                 }
1781
1782                                 $matches[3] = proxy_url($matches[3]);
1783                                 return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
1784                         },
1785                         $text
1786                 );
1787
1788                 $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $text);
1789                 $text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $text);
1790
1791                 // Images
1792                 // [img]pathtoimage[/img]
1793                 $text = preg_replace_callback(
1794                         "/\[img\](.*?)\[\/img\]/ism",
1795                         function ($matches) {
1796                                 if (strpos($matches[1], "data:image/") === 0) {
1797                                         return $matches[0];
1798                                 }
1799
1800                                 $matches[1] = proxy_url($matches[1]);
1801                                 return "[img]" . $matches[1] . "[/img]";
1802                         },
1803                         $text
1804                 );
1805
1806                 $text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1807                 $text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $text);
1808
1809                 // Shared content
1810                 $text = preg_replace_callback("/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
1811                         function ($match) use ($simple_html) {
1812                                 return self::convertShare($match, $simple_html);
1813                         }, $text);
1814
1815                 $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);
1816                 $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 />', $text);
1817                 //$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 />', $Text);
1818
1819                 // Try to Oembed
1820                 if ($try_oembed) {
1821                         $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);
1822                         $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);
1823
1824                         $text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text);
1825                         $text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text);
1826                 } else {
1827                         $text = preg_replace("/\[video\](.*?)\[\/video\]/",
1828                                                 '<a href="$1" target="_blank">$1</a>', $text);
1829                         $text = preg_replace("/\[audio\](.*?)\[\/audio\]/",
1830                                                 '<a href="$1" target="_blank">$1</a>', $text);
1831                 }
1832
1833                 // html5 video and audio
1834
1835
1836                 if ($try_oembed) {
1837                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $text);
1838                 } else {
1839                         $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $text);
1840                 }
1841
1842                 // Youtube extensions
1843                 if ($try_oembed) {
1844                         $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1845                         $text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1846                         $text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text);
1847                 }
1848
1849                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1850                 $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1851                 $text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text);
1852
1853                 if ($try_oembed) {
1854                         $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);
1855                 } else {
1856                         $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
1857                                                 '<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $text);
1858                 }
1859
1860                 if ($try_oembed) {
1861                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1862                         $text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text);
1863                 }
1864
1865                 $text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1866                 $text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text);
1867
1868                 if ($try_oembed) {
1869                         $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);
1870                 } else {
1871                         $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
1872                                                 '<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $text);
1873                 }
1874
1875                 // oembed tag
1876                 $text = OEmbed::BBCode2HTML($text);
1877
1878                 // Avoid triple linefeeds through oembed
1879                 $text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $text);
1880
1881                 // If we found an event earlier, strip out all the event code and replace with a reformatted version.
1882                 // Replace the event-start section with the entire formatted event. The other bbcode is stripped.
1883                 // Summary (e.g. title) is required, earlier revisions only required description (in addition to
1884                 // start which is always required). Allow desc with a missing summary for compatibility.
1885
1886                 if ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
1887                         $sub = format_event_html($ev, $simple_html);
1888
1889                         $text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
1890                         $text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
1891                         $text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text);
1892                         $text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text);
1893                         $text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text);
1894                         $text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $text);
1895                         $text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text);
1896                 }
1897
1898                 // Replace non graphical smilies for external posts
1899                 if ($simple_html) {
1900                         $text = Smilies::replace($text, false, true);
1901                 }
1902
1903                 // Replace inline code blocks
1904                 $text = preg_replace_callback("|(?!<br[^>]*>)<code>([^<]*)</code>(?!<br[^>]*>)|ism",
1905                         function ($match) use ($simple_html) {
1906                                 $return = '<key>' . $match[1] . '</key>';
1907                                 // Use <code> for Diaspora inline code blocks
1908                                 if ($simple_html === 3) {
1909                                         $return = '<code>' . $match[1] . '</code>';
1910                                 }
1911                                 return $return;
1912                         }
1913                 , $text);
1914
1915                 // Unhide all [noparse] contained bbtags unspacefying them
1916                 // and triming the [noparse] tag.
1917
1918                 $text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'self::unescapeNoparseCallback', $text);
1919                 $text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'self::unescapeNoparseCallback', $text);
1920                 $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'self::unescapeNoparseCallback', $text);
1921
1922
1923                 $text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $text);
1924                 $text = preg_replace('/\&\#039\;/', '\'', $text);
1925                 $text = preg_replace('/\&quot\;/', '"', $text);
1926
1927                 // fix any escaped ampersands that may have been converted into links
1928                 $text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/ism', '<$1$2=$3&$4>', $text);
1929
1930                 // sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails)
1931                 $allowed_src_protocols = ['http', 'redir', 'cid'];
1932                 $text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
1933                                          '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $text);
1934
1935                 // sanitize href attributes (only whitelisted protocols URLs)
1936                 // default value for backward compatibility
1937                 $allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);
1938
1939                 // Always allowed protocol even if config isn't set or not including it
1940                 $allowed_link_protocols[] = 'http';
1941                 $allowed_link_protocols[] = 'redir/';
1942
1943                 $regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism';
1944                 $text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . L10n::t('Invalid link protocol') . '">', $text);
1945
1946                 if ($saved_image) {
1947                         $text = self::interpolateSavedImagesIntoItemBody($text, $saved_image);
1948                 }
1949
1950                 // Clean up the HTML by loading and saving the HTML with the DOM.
1951                 // Bad structured html can break a whole page.
1952                 // For performance reasons do it only with ativated item cache or at export.
1953                 if (!$try_oembed || (get_itemcachepath() != "")) {
1954                         $doc = new DOMDocument();
1955                         $doc->preserveWhiteSpace = false;
1956
1957                         $text = mb_convert_encoding($text, 'HTML-ENTITIES', "UTF-8");
1958
1959                         $doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
1960                         $encoding = '<?xml encoding="UTF-8">';
1961                         @$doc->loadHTML($encoding.$doctype."<html><body>".$text."</body></html>");
1962                         $doc->encoding = 'UTF-8';
1963                         $text = $doc->saveHTML();
1964                         $text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $text);
1965
1966                         $text = str_replace('<br></li>', '</li>', $text);
1967
1968                         //$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
1969                 }
1970
1971                 // Clean up some useless linebreaks in lists
1972                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1973                 //$Text = str_replace('</ul><br />', '</ul>', $Text);
1974                 //$Text = str_replace('</li><br />', '</li>', $Text);
1975                 //$Text = str_replace('<br /><li>', '<li>', $Text);
1976                 //$Text = str_replace('<br /><ul', '<ul ', $Text);
1977
1978                 Addon::callHooks('bbcode', $text);
1979
1980                 return trim($text);
1981         }
1982
1983         /**
1984          * @brief Strips the "abstract" tag from the provided text
1985          *
1986          * @param string $text The text with BBCode
1987          * @return string The same text - but without "abstract" element
1988          */
1989         public static function stripAbstract($text)
1990         {
1991                 $text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", '', $text);
1992                 $text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", '', $text);
1993
1994                 return $text;
1995         }
1996
1997         /**
1998          * @brief Returns the value of the "abstract" element
1999          *
2000          * @param string $text The text that maybe contains the element
2001          * @param string $addon The addon for which the abstract is meant for
2002          * @return string The abstract
2003          */
2004         private static function getAbstract($text, $addon = "")
2005         {
2006                 $abstract = "";
2007                 $abstracts = [];
2008                 $addon = strtolower($addon);
2009
2010                 if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism", $text, $results, PREG_SET_ORDER)) {
2011                         foreach ($results AS $result) {
2012                                 $abstracts[strtolower($result[1])] = $result[2];
2013                         }
2014                 }
2015
2016                 if (isset($abstracts[$addon])) {
2017                         $abstract = $abstracts[$addon];
2018                 }
2019
2020                 if ($abstract == "" && preg_match("/\[abstract\](.*?)\[\/abstract\]/ism", $text, $result)) {
2021                         $abstract = $result[1];
2022                 }
2023
2024                 return $abstract;
2025         }
2026 }