src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_PERSONAL_NOTE = 128;
  60
  61         // Posting reasons (Why had a post been stored for a user?)
  62         const PR_NONE = 0;
  63         const PR_TAG = 64;
  64         const PR_TO = 65;
  65         const PR_CC = 66;
  66         const PR_BTO = 67;
  67         const PR_BCC = 68;
  68         const PR_FOLLOWER = 69;
  69         const PR_ANNOUNCEMENT = 70;
  70         const PR_COMMENT = 71;
  71         const PR_STORED = 72;
  72         const PR_GLOBAL = 73;
  73         const PR_RELAY = 74;
  74         const PR_FETCHED = 75;
  75
  76         // Field list that is used to display the items
  77         const DISPLAY_FIELDLIST = [
  78                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  79                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  80                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  81                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  82                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  83                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention',
  84                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  85                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  86                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  87                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  88                 'writable', 'self', 'cid', 'alias',
  89                 'event-created', 'event-edited', 'event-start', 'event-finish',
  90                 'event-summary', 'event-desc', 'event-location', 'event-type',
  91                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  92                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  93         ];
  94
  95         // Field list that is used to deliver items via the protocols
  96         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  97                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  98                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
  99                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 100                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 101                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 102                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'forum_mode', 'origin',
 103                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 104                         'event-created', 'event-edited', 'event-start', 'event-finish',
 105                         'event-summary', 'event-desc', 'event-location', 'event-type',
 106                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
 107
 108         // All fields in the item table
 109         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 110                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 111                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 112                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 113                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 114                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 115                         'private', 'pubmail', 'visible', 'starred',
 116                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 117                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 118                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 119                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 120                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 121
 122         // List of all verbs that don't need additional content data.
 123         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 124         const ACTIVITIES = [
 125                 Activity::LIKE, Activity::DISLIKE,
 126                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 127                 Activity::FOLLOW,
 128                 Activity::ANNOUNCE];
 129
 130         const PUBLIC = 0;
 131         const PRIVATE = 1;
 132         const UNLISTED = 2;
 133
 134         /**
 135          * Update existing item entries
 136          *
 137          * @param array $fields    The fields that are to be changed
 138          * @param array $condition The condition for finding the item entries
 139          *
 140          * In the future we may have to change permissions as well.
 141          * Then we had to add the user id as third parameter.
 142          *
 143          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 144          *
 145          * @return integer|boolean number of affected rows - or "false" if there was an error
 146          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 147          */
 148         public static function update(array $fields, array $condition)
 149         {
 150                 if (empty($condition) || empty($fields)) {
 151                         return false;
 152                 }
 153
 154                 if (isset($fields['extid'])) {
 155                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 156                 }
 157
 158                 if (!empty($fields['verb'])) {
 159                         $fields['vid'] = Verb::getID($fields['verb']);
 160                 }
 161
 162                 if (!empty($fields['edited'])) {
 163                         $previous = Post::selectFirst(['edited'], $condition);
 164                 }
 165
 166                 $rows = Post::update($fields, $condition);
 167                 if (is_bool($rows)) {
 168                         return $rows;
 169                 }
 170
 171                 // We only need to call the line by line update for specific fields
 172                 if (empty($fields['body']) && empty($fields['file']) &&
 173                         empty($fields['attach']) && empty($fields['edited'])) {
 174                         return $rows;
 175                 }
 176
 177                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 178
 179                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 180
 181                 $notify_items = [];
 182
 183                 while ($item = DBA::fetch($items)) {
 184                         if (!empty($fields['body'])) {
 185                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 186
 187                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 188
 189                                 // Remove all media attachments from the body and store them in the post-media table
 190                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 191                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 192                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 193
 194                                 if ($item['author-network'] != Protocol::DFRN) {
 195                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 196                                 }
 197
 198                                 Post\Content::update($item['uri-id'], $content_fields);
 199                         }
 200
 201                         if (!empty($fields['file'])) {
 202                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 203                         }
 204
 205                         if (!empty($fields['attach'])) {
 206                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 207                         }
 208
 209                         // We only need to notfiy others when it is an original entry from us.
 210                         // Only call the notifier when the item had been edited and records had been changed.
 211                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 212                                 $notify_items[] = $item['id'];
 213                         }
 214                 }
 215
 216                 DBA::close($items);
 217
 218                 foreach ($notify_items as $notify_item) {
 219                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 220                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 221                 }
 222
 223                 return $rows;
 224         }
 225
 226         /**
 227          * Delete an item and notify others about it - if it was ours
 228          *
 229          * @param array   $condition The condition for finding the item entries
 230          * @param integer $priority  Priority for the notification
 231          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 232          */
 233         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 234         {
 235                 $items = Post::select(['id'], $condition);
 236                 while ($item = Post::fetch($items)) {
 237                         self::markForDeletionById($item['id'], $priority);
 238                 }
 239                 DBA::close($items);
 240         }
 241
 242         /**
 243          * Delete an item for an user and notify others about it - if it was ours
 244          *
 245          * @param array   $condition The condition for finding the item entries
 246          * @param integer $uid       User who wants to delete this item
 247          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 248          */
 249         public static function deleteForUser($condition, $uid)
 250         {
 251                 if ($uid == 0) {
 252                         return;
 253                 }
 254
 255                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 256                 while ($item = Post::fetch($items)) {
 257                         if (in_array($item['uid'], [$uid, 0])) {
 258                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 259                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 260                         }
 261
 262                         if ($item['uid'] == $uid) {
 263                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 264                         } elseif ($item['uid'] != 0) {
 265                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 266                         }
 267                 }
 268                 DBA::close($items);
 269         }
 270
 271         /**
 272          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 273          *
 274          * @param integer $item_id
 275          * @param integer $priority Priority for the notification
 276          *
 277          * @return boolean success
 278          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 279          */
 280         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 281         {
 282                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 283                 // locate item to be deleted
 284                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 285                         'deleted', 'resource-id', 'event-id',
 286                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 287                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 288                 if (!DBA::isResult($item)) {
 289                         Logger::info('Item not found.', ['id' => $item_id]);
 290                         return false;
 291                 }
 292
 293                 if ($item['deleted']) {
 294                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 295                         return false;
 296                 }
 297
 298                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 299                 if (!DBA::isResult($parent)) {
 300                         $parent = ['origin' => false];
 301                 }
 302
 303                 // clean up categories and tags so they don't end up as orphans
 304                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 305
 306                 /*
 307                  * If item is a link to a photo resource, nuke all the associated photos
 308                  * (visitors will not have photo resources)
 309                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 310                  * generate a resource-id and therefore aren't intimately linked to the item.
 311                  */
 312                 /// @TODO: this should first check if photo is used elsewhere
 313                 if (strlen($item['resource-id'])) {
 314                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 315                 }
 316
 317                 // If item is a link to an event, delete the event.
 318                 if (intval($item['event-id'])) {
 319                         Event::delete($item['event-id']);
 320                 }
 321
 322                 // If item has attachments, drop them
 323                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 324                 foreach($attachments as $attachment) {
 325                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 326                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 327                         }
 328                 }
 329
 330                 // Set the item to "deleted"
 331                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 332                 Post::update($item_fields, ['id' => $item['id']]);
 333
 334                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 335
 336                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 337                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 338                 }
 339
 340                 Post\DeliveryData::delete($item['uri-id']);
 341
 342                 // If it's the parent of a comment thread, kill all the kids
 343                 if ($item['gravity'] == GRAVITY_PARENT) {
 344                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 345                 }
 346
 347                 // Is it our comment and/or our thread?
 348                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 349                         // When we delete the original post we will delete all existing copies on the server as well
 350                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 351
 352                         // send the notification upstream/downstream
 353                         if ($priority) {
 354                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 355                         }
 356                 } elseif ($item['uid'] != 0) {
 357                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 358                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 359                 }
 360
 361                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 362
 363                 return true;
 364         }
 365
 366         private static function guid($item, $notify)
 367         {
 368                 if (!empty($item['guid'])) {
 369                         return Strings::escapeTags(trim($item['guid']));
 370                 }
 371
 372                 if ($notify) {
 373                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 374                         // We add the hash of our own host because our host is the original creator of the post.
 375                         $prefix_host = DI::baseUrl()->getHostname();
 376                 } else {
 377                         $prefix_host = '';
 378
 379                         // We are only storing the post so we create a GUID from the original hostname.
 380                         if (!empty($item['author-link'])) {
 381                                 $parsed = parse_url($item['author-link']);
 382                                 if (!empty($parsed['host'])) {
 383                                         $prefix_host = $parsed['host'];
 384                                 }
 385                         }
 386
 387                         if (empty($prefix_host) && !empty($item['plink'])) {
 388                                 $parsed = parse_url($item['plink']);
 389                                 if (!empty($parsed['host'])) {
 390                                         $prefix_host = $parsed['host'];
 391                                 }
 392                         }
 393
 394                         if (empty($prefix_host) && !empty($item['uri'])) {
 395                                 $parsed = parse_url($item['uri']);
 396                                 if (!empty($parsed['host'])) {
 397                                         $prefix_host = $parsed['host'];
 398                                 }
 399                         }
 400
 401                         // Is it in the format data@host.tld? - Used for mail contacts
 402                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 403                                 $mailparts = explode('@', $item['author-link']);
 404                                 $prefix_host = array_pop($mailparts);
 405                         }
 406                 }
 407
 408                 if (!empty($item['plink'])) {
 409                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 410                 } elseif (!empty($item['uri'])) {
 411                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 412                 } else {
 413                         $guid = System::createUUID(hash('crc32', $prefix_host));
 414                 }
 415
 416                 return $guid;
 417         }
 418
 419         private static function contactId($item)
 420         {
 421                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 422                         return $item['contact-id'];
 423                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 424                         return $item['contact-id'];
 425                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 426                         return $item['author-id'];
 427                 } elseif (!empty($item['contact-id'])) {
 428                         return $item['contact-id'];
 429                 } else {
 430                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 431                         if (!empty($contact_id)) {
 432                                 return $contact_id;
 433                         }
 434                 }
 435                 return $item['author-id'];
 436         }
 437
 438         /**
 439          * Write an item array into a spool file to be inserted later.
 440          * This command is called whenever there are issues storing an item.
 441          *
 442          * @param array $item The item fields that are to be inserted
 443          * @throws \Exception
 444          */
 445         private static function spool($orig_item)
 446         {
 447                 // Now we store the data in the spool directory
 448                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 449                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 450
 451                 $spoolpath = get_spoolpath();
 452                 if ($spoolpath != "") {
 453                         $spool = $spoolpath . '/' . $file;
 454
 455                         file_put_contents($spool, json_encode($orig_item));
 456                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 457                 }
 458         }
 459
 460         /**
 461          * Check if the item array is a duplicate
 462          *
 463          * @param array $item
 464          * @return boolean is it a duplicate?
 465          */
 466         private static function isDuplicate(array $item)
 467         {
 468                 // Checking if there is already an item with the same guid
 469                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 470                 if (Post::exists($condition)) {
 471                         Logger::notice('Found already existing item', [
 472                                 'guid' => $item['guid'],
 473                                 'uid' => $item['uid'],
 474                                 'network' => $item['network']
 475                         ]);
 476                         return true;
 477                 }
 478
 479                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 480                         'network' => [$item['network'], Protocol::DFRN]];
 481                 if (Post::exists($condition)) {
 482                         Logger::notice('duplicated item with the same uri found.', $item);
 483                         return true;
 484                 }
 485
 486                 // On Friendica and Diaspora the GUID is unique
 487                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 488                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 489                         if (Post::exists($condition)) {
 490                                 Logger::notice('duplicated item with the same guid found.', $item);
 491                                 return true;
 492                         }
 493                 } elseif ($item['network'] == Protocol::OSTATUS) {
 494                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 495                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 496                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 497                         if (Post::exists($condition)) {
 498                                 Logger::notice('duplicated item with the same body found.', $item);
 499                                 return true;
 500                         }
 501                 }
 502
 503                 /*
 504                  * Check for already added items.
 505                  * There is a timing issue here that sometimes creates double postings.
 506                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 507                  */
 508                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 509                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 510                         return true;
 511                 }
 512
 513                 return false;
 514         }
 515
 516         /**
 517          * Check if the item array is valid
 518          *
 519          * @param array $item
 520          * @return boolean item is valid
 521          */
 522         public static function isValid(array $item)
 523         {
 524                 // When there is no content then we don't post it
 525                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 526                         Logger::notice('No body, no title.');
 527                         return false;
 528                 }
 529
 530                 if (!empty($item['uid'])) {
 531                         $owner = User::getOwnerDataById($item['uid'], false);
 532                         if (!$owner) {
 533                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 534                                 return false;
 535                         }
 536
 537                         if ($owner['account_expired'] || $owner['account_removed']) {
 538                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 539                                 return false;
 540                         }
 541                 }
 542
 543                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 544                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 545                         return false;
 546                 }
 547
 548                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 549                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 550                         return false;
 551                 }
 552
 553                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 554                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 555                         return false;
 556                 }
 557
 558                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 559                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 560                         return false;
 561                 }
 562
 563                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 564                         return false;
 565                 }
 566
 567                 if ($item['verb'] == Activity::FOLLOW) {
 568                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 569                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 570                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 571                                 return false;
 572                         }
 573
 574                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 575                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 576                         if (Post::exists($condition)) {
 577                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 578                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 579                                 return false;
 580                         }
 581                 }
 582
 583                 return true;
 584         }
 585
 586         /**
 587          * Check if the item array is too old
 588          *
 589          * @param array $item
 590          * @return boolean item is too old
 591          */
 592         public static function isTooOld(array $item)
 593         {
 594                 // check for create date and expire time
 595                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 596
 597                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 598                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 599                         $expire_interval = $user['expire'];
 600                 }
 601
 602                 if (($expire_interval > 0) && !empty($item['created'])) {
 603                         $expire_date = time() - ($expire_interval * 86400);
 604                         $created_date = strtotime($item['created']);
 605                         if ($created_date < $expire_date) {
 606                                 Logger::notice('Item created before expiration interval.', [
 607                                         'created' => date('c', $created_date),
 608                                         'expired' => date('c', $expire_date),
 609                                         '$item' => $item
 610                                 ]);
 611                                 return true;
 612                         }
 613                 }
 614
 615                 return false;
 616         }
 617
 618         /**
 619          * Return the id of the given item array if it has been stored before
 620          *
 621          * @param array $item
 622          * @return integer item id
 623          */
 624         private static function getDuplicateID(array $item)
 625         {
 626                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 627                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 628                                 $item['uri-id'], $item['uid'],
 629                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 630                         $existing = Post::selectFirst(['id', 'network'], $condition);
 631                         if (DBA::isResult($existing)) {
 632                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 633                                 if ($item['uid'] != 0) {
 634                                         Logger::notice('Item already existed for user', [
 635                                                 'uri-id' => $item['uri-id'],
 636                                                 'uid' => $item['uid'],
 637                                                 'network' => $item['network'],
 638                                                 'existing_id' => $existing["id"],
 639                                                 'existing_network' => $existing["network"]
 640                                         ]);
 641                                 }
 642
 643                                 return $existing["id"];
 644                         }
 645                 }
 646                 return 0;
 647         }
 648
 649         /**
 650          * Fetch top-level parent data for the given item array
 651          *
 652          * @param array $item
 653          * @return array item array with parent data
 654          * @throws \Exception
 655          */
 656         private static function getTopLevelParent(array $item)
 657         {
 658                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 659                         'uri-id', 'parent-uri-id',
 660                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 661                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 662                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 663                 $params = ['order' => ['id' => false]];
 664                 $parent = Post::selectFirst($fields, $condition, $params);
 665
 666                 if (!DBA::isResult($parent)) {
 667                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 668                         return [];
 669                 }
 670
 671                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 672                         return $parent;
 673                 }
 674
 675                 $condition = ['uri-id' => $parent['parent-uri-id'],
 676                         'parent-uri-id' => $parent['parent-uri-id'],
 677                         'uid' => $parent['uid']];
 678                 $params = ['order' => ['id' => false]];
 679                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 680                 if (!DBA::isResult($toplevel_parent)) {
 681                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 682                         return [];
 683                 }
 684
 685                 return $toplevel_parent;
 686         }
 687
 688         /**
 689          * Get the gravity for the given item array
 690          *
 691          * @param array $item
 692          * @return integer gravity
 693          */
 694         private static function getGravity(array $item)
 695         {
 696                 $activity = DI::activity();
 697
 698                 if (isset($item['gravity'])) {
 699                         return intval($item['gravity']);
 700                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 701                         return GRAVITY_PARENT;
 702                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 703                         return GRAVITY_COMMENT;
 704                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 705                         return GRAVITY_ACTIVITY;
 706                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 707                         return GRAVITY_ACTIVITY;
 708                 }
 709                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 710                 return GRAVITY_UNKNOWN;   // Should not happen
 711         }
 712
 713         public static function insert($item, $notify = false, $dontcache = false)
 714         {
 715                 $orig_item = $item;
 716
 717                 $priority = PRIORITY_HIGH;
 718
 719                 // If it is a posting where users should get notifications, then define it as wall posting
 720                 if ($notify) {
 721                         $item['wall'] = 1;
 722                         $item['origin'] = 1;
 723                         $item['network'] = Protocol::DFRN;
 724                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 725                         $item['direction'] = Conversation::PUSH;
 726
 727                         if (in_array($notify, PRIORITIES)) {
 728                                 $priority = $notify;
 729                         }
 730                 } else {
 731                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 732                 }
 733
 734                 $uid = intval($item['uid']);
 735
 736                 $item['guid'] = self::guid($item, $notify);
 737                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 738
 739                 // Store URI data
 740                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 741
 742                 // Backward compatibility: parent-uri used to be the direct parent uri.
 743                 // If it is provided without a thr-parent, it probably is the old behavior.
 744                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 745                 $item['parent-uri'] = $item['thr-parent'];
 746
 747                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 748
 749                 // Store conversation data
 750                 $item = Conversation::insert($item);
 751
 752                 /*
 753                  * Do we already have this item?
 754                  * We have to check several networks since Friendica posts could be repeated
 755                  * via OStatus (maybe Diasporsa as well)
 756                  */
 757                 $duplicate = self::getDuplicateID($item);
 758                 if ($duplicate) {
 759                         return $duplicate;
 760                 }
 761
 762                 // Additional duplicate checks
 763                 /// @todo Check why the first duplication check returns the item number and the second a 0
 764                 if (self::isDuplicate($item)) {
 765                         return 0;
 766                 }
 767
 768                 if (!isset($item['post-type'])) {
 769                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 770                 }
 771
 772                 $item['wall']          = intval($item['wall'] ?? 0);
 773                 $item['extid']         = trim($item['extid'] ?? '');
 774                 $item['author-name']   = trim($item['author-name'] ?? '');
 775                 $item['author-link']   = trim($item['author-link'] ?? '');
 776                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 777                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 778                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 779                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 780                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 781                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 782                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 783                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 784                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 785                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 786                 $item['location']      = trim($item['location'] ?? '');
 787                 $item['coord']         = trim($item['coord'] ?? '');
 788                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 789                 $item['deleted']       = 0;
 790                 $item['verb']          = trim($item['verb'] ?? '');
 791                 $item['object-type']   = trim($item['object-type'] ?? '');
 792                 $item['object']        = trim($item['object'] ?? '');
 793                 $item['target-type']   = trim($item['target-type'] ?? '');
 794                 $item['target']        = trim($item['target'] ?? '');
 795                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 796                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 797                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 798                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 799                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 800                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 801                 $item['body']          = trim($item['body'] ?? '');
 802                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 803                 $item['app']           = trim($item['app'] ?? '');
 804                 $item['origin']        = intval($item['origin'] ?? 0);
 805                 $item['postopts']      = trim($item['postopts'] ?? '');
 806                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 807                 $item['event-id']      = intval($item['event-id'] ?? 0);
 808                 $item['inform']        = trim($item['inform'] ?? '');
 809                 $item['file']          = trim($item['file'] ?? '');
 810
 811                 // Items cannot be stored before they happen ...
 812                 if ($item['created'] > DateTimeFormat::utcNow()) {
 813                         $item['created'] = DateTimeFormat::utcNow();
 814                 }
 815
 816                 // We haven't invented time travel by now.
 817                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 818                         $item['edited'] = DateTimeFormat::utcNow();
 819                 }
 820
 821                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 822
 823                 $item['gravity'] = self::getGravity($item);
 824
 825                 $item['language'] = self::getLanguage($item);
 826
 827                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 828                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 829                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 830
 831                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 832                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 833                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 834
 835                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 836                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 837                         $item['post-reason'] = self::PR_FOLLOWER;
 838                 }
 839
 840                 // Ensure that there is an avatar cache
 841                 Contact::checkAvatarCache($item['author-id']);
 842                 Contact::checkAvatarCache($item['owner-id']);
 843
 844                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 845                 $item["contact-id"] = self::contactId($item);
 846
 847                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 848                         self::isTooOld($item)) {
 849                         Logger::info('Item is too old', ['item' => $item]);
 850                         return 0;
 851                 }
 852
 853                 if (!self::isValid($item)) {
 854                         return 0;
 855                 }
 856
 857                 if ($item['gravity'] !== GRAVITY_PARENT) {
 858                         $toplevel_parent = self::getTopLevelParent($item);
 859                         if (empty($toplevel_parent)) {
 860                                 return 0;
 861                         }
 862
 863                         // If the thread originated from this node, we check the permission against the thread starter
 864                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 865                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 866                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 867                                 return 0;
 868                         }
 869
 870                         $parent_id             = $toplevel_parent['id'];
 871                         $item['parent-uri']    = $toplevel_parent['uri'];
 872                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 873                         $item['deleted']       = $toplevel_parent['deleted'];
 874                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 875                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 876                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 877                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 878                         $parent_origin         = $toplevel_parent['origin'];
 879
 880                         // Don't federate received participation messages
 881                         if ($item['verb'] != Activity::FOLLOW) {
 882                                 $item['wall'] = $toplevel_parent['wall'];
 883                         } else {
 884                                 $item['wall'] = false;
 885                                 // Participations are technical messages, so they are set to "seen" automatically
 886                                 $item['unseen'] = false;
 887                         }
 888
 889                         /*
 890                          * If the parent is private, force privacy for the entire conversation
 891                          * This differs from the above settings as it subtly allows comments from
 892                          * email correspondents to be private even if the overall thread is not.
 893                          */
 894                         if ($toplevel_parent['private']) {
 895                                 $item['private'] = $toplevel_parent['private'];
 896                         }
 897
 898                         /*
 899                          * Edge case. We host a public forum that was originally posted to privately.
 900                          * The original author commented, but as this is a comment, the permissions
 901                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 902                          */
 903                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 904                                 $item['private'] = self::PUBLIC;
 905                         }
 906
 907                         // If its a post that originated here then tag the thread as "mention"
 908                         if ($item['origin'] && $item['uid']) {
 909                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 910                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 911                         }
 912
 913                         // Update the contact relations
 914                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 915                 } else {
 916                         $parent_id = 0;
 917                         $parent_origin = $item['origin'];
 918                 }
 919
 920                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 921                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 922
 923                 // Is this item available in the global items (with uid=0)?
 924                 if ($item["uid"] == 0) {
 925                         $item["global"] = true;
 926
 927                         // Set the global flag on all items if this was a global item entry
 928                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 929                 } else {
 930                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 931                 }
 932
 933                 // ACL settings
 934                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 935                         $item["private"] = self::PRIVATE;
 936                 }
 937
 938                 if ($notify) {
 939                         $item['edit'] = false;
 940                         $item['parent'] = $parent_id;
 941
 942                         // Trigger automatic reactions for addons
 943                         $item['api_source'] = true;
 944
 945                         // We have to tell the hooks who we are - this really should be improved
 946                         if (!local_user()) {
 947                                 $_SESSION['authenticated'] = true;
 948                                 $_SESSION['uid'] = $uid;
 949                                 $dummy_session = true;
 950                         } else {
 951                                 $dummy_session = false;
 952                         }
 953
 954                         Hook::callAll('post_local', $item);
 955
 956                         if ($dummy_session) {
 957                                 unset($_SESSION['authenticated']);
 958                                 unset($_SESSION['uid']);
 959                         }
 960                 } else {
 961                         Hook::callAll('post_remote', $item);
 962                 }
 963
 964                 if (!empty($item['cancel'])) {
 965                         Logger::log('post cancelled by addon.');
 966                         return 0;
 967                 }
 968
 969                 if (empty($item['vid']) && !empty($item['verb'])) {
 970                         $item['vid'] = Verb::getID($item['verb']);
 971                 }
 972
 973                 // Creates or assigns the permission set
 974                 $item['psid'] = PermissionSet::getIdFromACL(
 975                         $item['uid'],
 976                         $item['allow_cid'],
 977                         $item['allow_gid'],
 978                         $item['deny_cid'],
 979                         $item['deny_gid']
 980                 );
 981
 982                 if (!empty($item['extid'])) {
 983                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 984                 }
 985
 986                 if ($item['verb'] == Activity::ANNOUNCE) {
 987                         self::setOwnerforResharedItem($item);
 988                 }
 989
 990                 if (isset($item['attachments'])) {
 991                         foreach ($item['attachments'] as $attachment) {
 992                                 $attachment['uri-id'] = $item['uri-id'];
 993                                 Post\Media::insert($attachment);
 994                         }
 995                         unset($item['attachments']);
 996                 }
 997
 998                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
 999
1000                 // Remove all media attachments from the body and store them in the post-media table
1001                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1002                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1003
1004                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1005                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1006                 }
1007
1008                 // Check for hashtags in the body and repair or add hashtag links
1009                 $item['body'] = self::setHashtags($item['body']);
1010
1011                 if (stristr($item['verb'], Activity::POKE)) {
1012                         $notify_type = Delivery::POKE;
1013                 } else {
1014                         $notify_type = Delivery::POST;
1015                 }
1016
1017                 // Filling item related side tables
1018                 if (!empty($item['attach'])) {
1019                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1020                 }
1021
1022                 if (empty($item['event-id'])) {
1023                         unset($item['event-id']);
1024
1025                         $ev = Event::fromBBCode($item['body']);
1026                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1027                                 Logger::info('Event found.');
1028                                 $ev['cid']       = $item['contact-id'];
1029                                 $ev['uid']       = $item['uid'];
1030                                 $ev['uri']       = $item['uri'];
1031                                 $ev['edited']    = $item['edited'];
1032                                 $ev['private']   = $item['private'];
1033                                 $ev['guid']      = $item['guid'];
1034                                 $ev['plink']     = $item['plink'];
1035                                 $ev['network']   = $item['network'];
1036                                 $ev['protocol']  = $item['protocol'];
1037                                 $ev['direction'] = $item['direction'];
1038                                 $ev['source']    = $item['source'];
1039
1040                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1041                                 if (DBA::isResult($event)) {
1042                                         $ev['id'] = $event['id'];
1043                                 }
1044
1045                                 $item['event-id'] = Event::store($ev);
1046                                 Logger::info('Event was stored', ['id' => $item['event-id']]);
1047                         }
1048                 }
1049
1050                 if (empty($item['causer-id'])) {
1051                         unset($item['causer-id']);
1052                 }
1053
1054                 Post::insert($item['uri-id'], $item);
1055
1056                 if ($item['gravity'] == GRAVITY_PARENT) {
1057                         Post\Thread::insert($item['uri-id'], $item);
1058                 }
1059
1060                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1061                         Post\Content::insert($item['uri-id'], $item);
1062                 }
1063
1064                 // Create Diaspora signature
1065                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1066                         $signed = Diaspora::createCommentSignature($uid, $item);
1067                         if (!empty($signed)) {
1068                                 $item['diaspora_signed_text'] = json_encode($signed);
1069                         }
1070                 }
1071
1072                 if (!empty($item['diaspora_signed_text'])) {
1073                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1074                 }
1075
1076                 // Attached file links
1077                 if (!empty($item['file'])) {
1078                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1079                 }
1080
1081                 // Delivery relevant data
1082                 $delivery_data = Post\DeliveryData::extractFields($item);
1083
1084                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1085                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1086                 }
1087
1088                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1089                 if (!Tag::existsForPost($item['uri-id'])) {
1090                         Tag::storeFromBody($item['uri-id'], $item['body']);
1091                 }
1092
1093                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1094                 if (Post::exists($condition)) {
1095                         Logger::notice('Item is already inserted - aborting', $condition);
1096                         return 0;
1097                 }
1098
1099                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1100                 if (!$post_user_id) {
1101                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1102                         return 0;
1103                 }
1104
1105                 if ($item['gravity'] == GRAVITY_PARENT) {
1106                         $item['post-user-id'] = $post_user_id;
1107                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1108                 }
1109
1110                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1111
1112                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1113                 if (!DBA::isResult($posted_item)) {
1114                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1115                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1116                         self::spool($orig_item);
1117                         return 0;
1118                 }
1119
1120                 // update the commented timestamp on the parent
1121                 if (DI::config()->get('system', 'like_no_comment')) {
1122                         // Update when it is a comment
1123                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1124                 } else {
1125                         // Update when it isn't a follow or tag verb
1126                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1127                 }
1128
1129                 if ($update_commented) {
1130                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1131                 } else {
1132                         $fields = ['changed' => DateTimeFormat::utcNow()];
1133                 }
1134
1135                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1136
1137                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1138                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1139                         // Get the user information for the logging
1140                         $user = User::getById($uid);
1141
1142                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1143                         return 0;
1144                 }
1145
1146                 if (!$dontcache) {
1147                         if ($notify) {
1148                                 Hook::callAll('post_local_end', $posted_item);
1149                         } else {
1150                                 Hook::callAll('post_remote_end', $posted_item);
1151                         }
1152                 }
1153
1154                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1155                         self::addShadow($post_user_id);
1156                 } else {
1157                         self::addShadowPost($post_user_id);
1158                 }
1159
1160                 self::updateContact($posted_item);
1161
1162                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1163
1164                 check_user_notification($posted_item['uri-id'], $posted_item['uid']);
1165
1166                 // Distribute items to users who subscribed to their tags
1167                 self::distributeByTags($posted_item);
1168
1169                 // Automatically reshare the item if the "remote_self" option is selected
1170                 self::autoReshare($posted_item);
1171
1172                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1173
1174                 if ($transmit) {
1175                         // Don't relay participation messages
1176                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1177                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1178                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1179                                 $transmit = false;
1180                         }
1181                 }
1182
1183                 if ($transmit) {
1184                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1185                 }
1186
1187                 return $post_user_id;
1188         }
1189
1190         /**
1191          * Change the owner of a parent item if it had been shared by a forum
1192          *
1193          * (public) forum posts in the new format consist of the regular post by the author
1194          * followed by an announce message sent from the forum account.
1195          * Changing the owner helps in grouping forum posts.
1196          *
1197          * @param array $item
1198          * @return void
1199          */
1200         private static function setOwnerforResharedItem(array $item)
1201         {
1202                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1203                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1204                 if (!DBA::isResult($parent)) {
1205                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1206                         return;
1207                 }
1208
1209                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1210                 if (!DBA::isResult($author)) {
1211                         Logger::error('Author not found', ['id' => $item['author-id']]);
1212                         return;
1213                 }
1214
1215                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1216                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1217                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1218                         return;
1219                 }
1220
1221                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1222                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1223                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1224                                 return;
1225                         }
1226
1227                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1228                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1229                                 return;
1230                         }
1231                 }
1232
1233                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1234                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1235         }
1236
1237         /**
1238          * Distribute the given item to users who subscribed to their tags
1239          *
1240          * @param array $item     Processed item
1241          */
1242         private static function distributeByTags(array $item)
1243         {
1244                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1245                         return;
1246                 }
1247
1248                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1249                 foreach ($uids as $uid) {
1250                         if (Contact::isSharing($item['author-id'], $uid)) {
1251                                 $fields = [];
1252                         } else {
1253                                 $fields = ['post-reason' => self::PR_TAG];
1254                         }
1255
1256                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1257                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1258                 }
1259         }
1260
1261         /**
1262          * Distributes public items to the receivers
1263          *
1264          * @param integer $itemid      Item ID that should be added
1265          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1266          * @throws \Exception
1267          */
1268         public static function distribute($itemid, $signed_text = '')
1269         {
1270                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1271                 $parent = Post::selectFirst(['owner-id'], $condition);
1272                 if (!DBA::isResult($parent)) {
1273                         Logger::warning('Item not found', ['condition' => $condition]);
1274                         return;
1275                 }
1276
1277                 // Only distribute public items from native networks
1278                 $condition = ['id' => $itemid, 'uid' => 0,
1279                         'network' => array_merge(Protocol::FEDERATED ,['']),
1280                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1281                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1282                 if (!DBA::isResult($item)) {
1283                         Logger::warning('Item not found', ['condition' => $condition]);
1284                         return;
1285                 }
1286
1287                 $origin = $item['origin'];
1288
1289                 $users = [];
1290
1291                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1292                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1293                 if (!DBA::isResult($owner)) {
1294                         return;
1295                 }
1296
1297                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1298                 $contacts = DBA::select('contact', ['uid'], $condition);
1299                 while ($contact = DBA::fetch($contacts)) {
1300                         if ($contact['uid'] == 0) {
1301                                 continue;
1302                         }
1303
1304                         $users[$contact['uid']] = $contact['uid'];
1305                 }
1306                 DBA::close($contacts);
1307
1308                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1309                 $contacts = DBA::select('contact', ['uid'], $condition);
1310                 while ($contact = DBA::fetch($contacts)) {
1311                         if ($contact['uid'] == 0) {
1312                                 continue;
1313                         }
1314
1315                         $users[$contact['uid']] = $contact['uid'];
1316                 }
1317                 DBA::close($contacts);
1318
1319                 if (!empty($owner['alias'])) {
1320                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1321                         $contacts = DBA::select('contact', ['uid'], $condition);
1322                         while ($contact = DBA::fetch($contacts)) {
1323                                 if ($contact['uid'] == 0) {
1324                                         continue;
1325                                 }
1326
1327                                 $users[$contact['uid']] = $contact['uid'];
1328                         }
1329                         DBA::close($contacts);
1330                 }
1331
1332                 $origin_uid = 0;
1333
1334                 if ($item['uri-id'] != $item['parent-uri-id']) {
1335                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1336                         while ($parent = Post::fetch($parents)) {
1337                                 $users[$parent['uid']] = $parent['uid'];
1338                                 if ($parent['origin'] && !$origin) {
1339                                         $origin_uid = $parent['uid'];
1340                                 }
1341                         }
1342                         DBA::close($parents);
1343                 }
1344
1345                 foreach ($users as $uid) {
1346                         if ($origin_uid == $uid) {
1347                                 $item['diaspora_signed_text'] = $signed_text;
1348                         }
1349                         self::storeForUser($item, $uid);
1350                 }
1351         }
1352
1353         /**
1354          * Store a public item defined by their URI-ID for the given users
1355          *
1356          * @param integer $uri_id     URI-ID of the given item
1357          * @param integer $uid        The user that will receive the item entry
1358          * @param array   $fields     Additional fields to be stored
1359          * @param integer $source_uid User id of the source post
1360          * @return integer stored item id
1361          */
1362         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1363         {
1364                 if ($uid == $source_uid) {
1365                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1366                         return 0;
1367                 }
1368
1369                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1370                 if (!DBA::isResult($item)) {
1371                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1372                         return 0;
1373                 }
1374
1375                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1376                         Logger::notice('Item is private or not from a federated network. It will not be stored for the user.', ['uri-id' => $uri_id, 'uid' => $uid, 'private' => $item['private'], 'network' => $item['network']]);
1377                         return 0;
1378                 }
1379
1380                 $item['post-reason'] = self::PR_STORED;
1381
1382                 $item = array_merge($item, $fields);
1383
1384                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1385
1386                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1387                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1388                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1389                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1390                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1391                         return 0;
1392                 }
1393
1394                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1395                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1396                         $causer = $item['causer-id'] ?: $item['author-id'];
1397                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1398                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1399                 }
1400
1401                 $stored = self::storeForUser($item, $uid);
1402                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1403                 return $stored;
1404         }
1405
1406         /**
1407          * Store a public item array for the given users
1408          *
1409          * @param array   $item   The item entry that will be stored
1410          * @param integer $uid    The user that will receive the item entry
1411          * @return integer stored item id
1412          * @throws \Exception
1413          */
1414         private static function storeForUser(array $item, int $uid)
1415         {
1416                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1417                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1418                         return 0;
1419                 }
1420
1421                 unset($item['id']);
1422                 unset($item['mention']);
1423                 unset($item['starred']);
1424                 unset($item['unseen']);
1425                 unset($item['psid']);
1426                 unset($item['pinned']);
1427                 unset($item['ignored']);
1428                 unset($item['pubmail']);
1429                 unset($item['forum_mode']);
1430
1431                 unset($item['event-id']);
1432                 unset($item['hidden']);
1433                 unset($item['notification-type']);
1434
1435                 $item['uid'] = $uid;
1436                 $item['origin'] = 0;
1437                 $item['wall'] = 0;
1438
1439                 if ($item['gravity'] == GRAVITY_PARENT) {
1440                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1441                 } else {
1442                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1443                 }
1444
1445                 if (!empty($contact['id'])) {
1446                         $item['contact-id'] = $contact['id'];
1447                 } else {
1448                         // Shouldn't happen at all
1449                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1450                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1451                         if (!DBA::isResult($self)) {
1452                                 // Shouldn't happen even less
1453                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1454                                 return 0;
1455                         }
1456                         $item['contact-id'] = $self['id'];
1457                 }
1458
1459                 $notify = false;
1460                 if ($item['gravity'] == GRAVITY_PARENT) {
1461                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1462                         if (DBA::isResult($contact)) {
1463                                 $notify = self::isRemoteSelf($contact, $item);
1464                         }
1465                 }
1466
1467                 $distributed = self::insert($item, $notify, true);
1468
1469                 if (!$distributed) {
1470                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1471                 } else {
1472                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1473                 }
1474                 return $distributed;
1475         }
1476
1477         /**
1478          * Add a shadow entry for a given item id that is a thread starter
1479          *
1480          * We store every public item entry additionally with the user id "0".
1481          * This is used for the community page and for the search.
1482          * It is planned that in the future we will store public item entries only once.
1483          *
1484          * @param integer $itemid Item ID that should be added
1485          * @throws \Exception
1486          */
1487         private static function addShadow($itemid)
1488         {
1489                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1490                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1491                 $item = Post::selectFirst($fields, $condition);
1492
1493                 if (!DBA::isResult($item)) {
1494                         return;
1495                 }
1496
1497                 // is it already a copy?
1498                 if (($itemid == 0) || ($item['uid'] == 0)) {
1499                         return;
1500                 }
1501
1502                 // Is it a visible public post?
1503                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1504                         return;
1505                 }
1506
1507                 // is it an entry from a connector? Only add an entry for natively connected networks
1508                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1509                         return;
1510                 }
1511
1512                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1513                         return;
1514                 }
1515
1516                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1517
1518                 if (DBA::isResult($item)) {
1519                         // Preparing public shadow (removing user specific data)
1520                         $item['uid'] = 0;
1521                         unset($item['id']);
1522                         unset($item['parent']);
1523                         unset($item['wall']);
1524                         unset($item['mention']);
1525                         unset($item['origin']);
1526                         unset($item['starred']);
1527                         unset($item['postopts']);
1528                         unset($item['inform']);
1529                         unset($item['post-reason']);
1530                         if ($item['uri-id'] == $item['parent-uri-id']) {
1531                                 $item['contact-id'] = $item['owner-id'];
1532                         } else {
1533                                 $item['contact-id'] = $item['author-id'];
1534                         }
1535
1536                         $public_shadow = self::insert($item, false, true);
1537
1538                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1539                 }
1540         }
1541
1542         /**
1543          * Add a shadow entry for a given item id that is a comment
1544          *
1545          * This function does the same like the function above - but for comments
1546          *
1547          * @param integer $itemid Item ID that should be added
1548          * @throws \Exception
1549          */
1550         private static function addShadowPost($itemid)
1551         {
1552                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1553                 if (!DBA::isResult($item)) {
1554                         return;
1555                 }
1556
1557                 // Is it a toplevel post?
1558                 if ($item['gravity'] == GRAVITY_PARENT) {
1559                         self::addShadow($itemid);
1560                         return;
1561                 }
1562
1563                 // Is this a shadow entry?
1564                 if ($item['uid'] == 0) {
1565                         return;
1566                 }
1567
1568                 // Is there a shadow parent?
1569                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1570                         return;
1571                 }
1572
1573                 // Is there already a shadow entry?
1574                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1575                         return;
1576                 }
1577
1578                 // Save "origin" and "parent" state
1579                 $origin = $item['origin'];
1580                 $parent = $item['parent'];
1581
1582                 // Preparing public shadow (removing user specific data)
1583                 $item['uid'] = 0;
1584                 unset($item['id']);
1585                 unset($item['parent']);
1586                 unset($item['wall']);
1587                 unset($item['mention']);
1588                 unset($item['origin']);
1589                 unset($item['starred']);
1590                 unset($item['postopts']);
1591                 unset($item['inform']);
1592                 unset($item['post-reason']);
1593                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1594
1595                 $public_shadow = self::insert($item, false, true);
1596
1597                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1598
1599                 // If this was a comment to a Diaspora post we don't get our comment back.
1600                 // This means that we have to distribute the comment by ourselves.
1601                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1602                         self::distribute($public_shadow);
1603                 }
1604         }
1605
1606         /**
1607          * Adds a language specification in a "language" element of given $arr.
1608          * Expects "body" element to exist in $arr.
1609          *
1610          * @param array $item
1611          * @return string detected language
1612          * @throws \Text_LanguageDetect_Exception
1613          */
1614         private static function getLanguage(array $item)
1615         {
1616                 if (!empty($item['language'])) {
1617                         return $item['language'];
1618                 }
1619
1620                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1621                         return '';
1622                 }
1623
1624                 // Convert attachments to links
1625                 $naked_body = BBCode::removeAttachment($item['body']);
1626                 if (empty($naked_body)) {
1627                         return '';
1628                 }
1629
1630                 // Remove links and pictures
1631                 $naked_body = BBCode::removeLinks($naked_body);
1632
1633                 // Convert the title and the body to plain text
1634                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1635
1636                 // Remove possibly remaining links
1637                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1638
1639                 if (empty($naked_body)) {
1640                         return '';
1641                 }
1642
1643                 $ld = new Language(DI::l10n()->getAvailableLanguages());
1644                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1645                 if (is_array($languages)) {
1646                         return json_encode($languages);
1647                 }
1648
1649                 return '';
1650         }
1651
1652         public static function getLanguageMessage(array $item)
1653         {
1654                 $iso639 = new \Matriphe\ISO639\ISO639;
1655
1656                 $used_languages = '';
1657                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1658                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1659                 }
1660                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1661                 return $used_languages;
1662         }
1663
1664         /**
1665          * Creates an unique guid out of a given uri
1666          *
1667          * @param string $uri uri of an item entry
1668          * @param string $host hostname for the GUID prefix
1669          * @return string unique guid
1670          */
1671         public static function guidFromUri($uri, $host)
1672         {
1673                 // Our regular guid routine is using this kind of prefix as well
1674                 // We have to avoid that different routines could accidentally create the same value
1675                 $parsed = parse_url($uri);
1676
1677                 // We use a hash of the hostname as prefix for the guid
1678                 $guid_prefix = hash("crc32", $host);
1679
1680                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1681                 unset($parsed["scheme"]);
1682
1683                 // Glue it together to be able to make a hash from it
1684                 $host_id = implode("/", $parsed);
1685
1686                 // We could use any hash algorithm since it isn't a security issue
1687                 $host_hash = hash("ripemd128", $host_id);
1688
1689                 return $guid_prefix.$host_hash;
1690         }
1691
1692         /**
1693          * generate an unique URI
1694          *
1695          * @param integer $uid  User id
1696          * @param string  $guid An existing GUID (Otherwise it will be generated)
1697          *
1698          * @return string
1699          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1700          */
1701         public static function newURI($uid, $guid = "")
1702         {
1703                 if ($guid == "") {
1704                         $guid = System::createUUID();
1705                 }
1706
1707                 return DI::baseUrl()->get() . '/objects/' . $guid;
1708         }
1709
1710         /**
1711          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1712          *
1713          * This can be used to filter for inactive contacts.
1714          * Only do this for public postings to avoid privacy problems, since poco data is public.
1715          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1716          *
1717          * @param array $arr Contains the just posted item record
1718          * @throws \Exception
1719          */
1720         private static function updateContact($arr)
1721         {
1722                 // Unarchive the author
1723                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1724                 if (DBA::isResult($contact)) {
1725                         Contact::unmarkForArchival($contact);
1726                 }
1727
1728                 // Unarchive the contact if it's not our own contact
1729                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1730                 if (DBA::isResult($contact)) {
1731                         Contact::unmarkForArchival($contact);
1732                 }
1733
1734                 /// @todo On private posts we could obfuscate the date
1735                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1736
1737                 // Is it a forum? Then we don't care about the rules from above
1738                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1739                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1740                                 $update = true;
1741                         }
1742                 }
1743
1744                 if ($update) {
1745                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1746                         // So we have to ensure to only update the last item when it had been our own post,
1747                         // or it had been done by a "regular" contact.
1748                         if (!empty($arr['wall'])) {
1749                                 $condition = ['id' => $arr['contact-id']];
1750                         } else {
1751                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1752                         }
1753                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1754                 }
1755                 // Now do the same for the system wide contacts with uid=0
1756                 if ($arr['private'] != self::PRIVATE) {
1757                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1758                                 ['id' => $arr['owner-id']]);
1759
1760                         if ($arr['owner-id'] != $arr['author-id']) {
1761                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1762                                         ['id' => $arr['author-id']]);
1763                         }
1764                 }
1765         }
1766
1767         public static function setHashtags($body)
1768         {
1769                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1770                         $tags = BBCode::getTags($body);
1771
1772                         // No hashtags?
1773                         if (!count($tags)) {
1774                                 return $body;
1775                         }
1776
1777                         // This sorting is important when there are hashtags that are part of other hashtags
1778                         // Otherwise there could be problems with hashtags like #test and #test2
1779                         // Because of this we are sorting from the longest to the shortest tag.
1780                         usort($tags, function ($a, $b) {
1781                                 return strlen($b) <=> strlen($a);
1782                         });
1783
1784                         $URLSearchString = "^\[\]";
1785
1786                         // All hashtags should point to the home server if "local_tags" is activated
1787                         if (DI::config()->get('system', 'local_tags')) {
1788                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1789                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1790                         }
1791
1792                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1793                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1794                                 function ($match) {
1795                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1796                                 }, $body);
1797
1798                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1799                                 function ($match) {
1800                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1801                                 }, $body);
1802
1803                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1804                                 function ($match) {
1805                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1806                                 }, $body);
1807
1808                         // Repair recursive urls
1809                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1810                                 "&num;$2", $body);
1811
1812                         foreach ($tags as $tag) {
1813                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1814                                         continue;
1815                                 }
1816
1817                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1818                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1819
1820                                 $body = str_replace($tag, $newtag, $body);
1821                         }
1822
1823                         // Convert back the masked hashtags
1824                         $body = str_replace("&num;", "#", $body);
1825
1826                         return $body;
1827                 });
1828
1829                 return $body;
1830         }
1831
1832         /**
1833          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1834          *
1835          * @param int $uid
1836          * @param int $item_id
1837          * @return boolean true if item was deleted, else false
1838          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1839          * @throws \ImagickException
1840          */
1841         private static function tagDeliver($uid, $item_id)
1842         {
1843                 $mention = false;
1844
1845                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1846                 if (!DBA::isResult($user)) {
1847                         return false;
1848                 }
1849
1850                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1851                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1852
1853                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1854                 if (!DBA::isResult($item)) {
1855                         return false;
1856                 }
1857
1858                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1859
1860                 /*
1861                  * Diaspora uses their own hardwired link URL in @-tags
1862                  * instead of the one we supply with webfinger
1863                  */
1864                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1865
1866                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1867                 if ($cnt) {
1868                         foreach ($matches as $mtch) {
1869                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1870                                         $mention = true;
1871                                         Logger::log('mention found: ' . $mtch[2]);
1872                                 }
1873                         }
1874                 }
1875
1876                 if (!$mention) {
1877                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1878                         foreach ($tags as $tag) {
1879                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1880                                         $mention = true;
1881                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1882                                 }
1883                         }
1884                 }
1885
1886                 if (!$mention) {
1887                         if (($community_page || $prvgroup) &&
1888                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1889                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item['id'], 'guid'=> $item['guid']]);
1890                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1891                                 return true;
1892                         }
1893                         return false;
1894                 }
1895
1896                 $arr = ['item' => $item, 'user' => $user];
1897
1898                 Hook::callAll('tagged', $arr);
1899
1900                 if (!$community_page && !$prvgroup) {
1901                         return false;
1902                 }
1903
1904                 /*
1905                  * tgroup delivery - setup a second delivery chain
1906                  * prevent delivery looping - only proceed
1907                  * if the message originated elsewhere and is a top-level post
1908                  */
1909                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1910                         return false;
1911                 }
1912
1913                 self::performActivity($item['id'], 'announce', $uid);
1914
1915                 /**
1916                  * All the following lines are only needed for private forums and compatibility to older systems without AP support.
1917                  * A possible way would be that the followers list of a forum would always be readable by all followers.
1918                  * So this would mean that the comment distribution could be done exactly for the intended audience.
1919                  * Or possibly we could store the receivers that had been in the "announce" message above and use this.
1920                  */
1921
1922                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1923                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1924                 if (!DBA::isResult($self)) {
1925                         return false;
1926                 }
1927
1928                 $owner_id = Contact::getIdForURL($self['url']);
1929
1930                 // also reset all the privacy bits to the forum default permissions
1931                 if ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) {
1932                         $private = self::PRIVATE;
1933                 } elseif (DI::pConfig()->get($user['uid'], 'system', 'unlisted')) {
1934                         $private = self::UNLISTED;
1935                 } else {
1936                         $private = self::PUBLIC;
1937                 }
1938
1939                 $psid = PermissionSet::getIdFromACL(
1940                         $user['uid'],
1941                         $user['allow_cid'],
1942                         $user['allow_gid'],
1943                         $user['deny_cid'],
1944                         $user['deny_gid']
1945                 );
1946
1947                 $forum_mode = ($prvgroup ? 2 : 1);
1948
1949                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1950                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
1951                 self::update($fields, ['id' => $item['id']]);
1952
1953                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1954
1955                 return false;
1956         }
1957
1958         /**
1959          * Automatically reshare the item if the "remote_self" option is selected
1960          *
1961          * @param array $item
1962          * @return void
1963          */
1964         private static function autoReshare(array $item)
1965         {
1966                 if ($item['gravity'] != GRAVITY_PARENT) {
1967                         return;
1968                 }
1969
1970                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1971                         return;
1972                 }
1973
1974                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1975                         return;
1976                 }
1977
1978                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1979
1980                 self::performActivity($item['id'], 'announce', $item['uid']);
1981         }
1982
1983         public static function isRemoteSelf($contact, &$datarray)
1984         {
1985                 if (!$contact['remote_self']) {
1986                         return false;
1987                 }
1988
1989                 // Prevent the forwarding of posts that are forwarded
1990                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
1991                         Logger::info('Already forwarded');
1992                         return false;
1993                 }
1994
1995                 // Prevent to forward already forwarded posts
1996                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
1997                         Logger::info('Already forwarded (second test)');
1998                         return false;
1999                 }
2000
2001                 // Only forward posts
2002                 if ($datarray["verb"] != Activity::POST) {
2003                         Logger::info('No post');
2004                         return false;
2005                 }
2006
2007                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2008                         Logger::info('Not public');
2009                         return false;
2010                 }
2011
2012                 $datarray2 = $datarray;
2013                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2014                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2015                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2016                                         ['uid' => $contact['uid'], 'self' => true]);
2017                         if (DBA::isResult($self)) {
2018                                 $datarray['contact-id'] = $self["id"];
2019
2020                                 $datarray['owner-name'] = $self["name"];
2021                                 $datarray['owner-link'] = $self["url"];
2022                                 $datarray['owner-avatar'] = $self["thumb"];
2023
2024                                 $datarray['author-name']   = $datarray['owner-name'];
2025                                 $datarray['author-link']   = $datarray['owner-link'];
2026                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2027
2028                                 unset($datarray['edited']);
2029
2030                                 unset($datarray['network']);
2031                                 unset($datarray['owner-id']);
2032                                 unset($datarray['author-id']);
2033                         }
2034
2035                         if ($contact['network'] != Protocol::FEED) {
2036                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2037                                 $datarray["guid"] = System::createUUID();
2038                                 unset($datarray["plink"]);
2039                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2040                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2041                                 $datarray["extid"] = Protocol::DFRN;
2042                                 $urlpart = parse_url($datarray2['author-link']);
2043                                 $datarray["app"] = $urlpart["host"];
2044                                 if (!empty($old_uri_id)) {
2045                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2046                                 }
2047
2048                                 unset($datarray["parent-uri"]);
2049                                 unset($datarray["thr-parent"]);
2050                         } else {
2051                                 $datarray['private'] = self::PUBLIC;
2052                         }
2053                 }
2054
2055                 if ($contact['network'] != Protocol::FEED) {
2056                         // Store the original post
2057                         $result = self::insert($datarray2);
2058                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2059                 } else {
2060                         $datarray["app"] = "Feed";
2061                         $result = true;
2062                 }
2063
2064                 return (bool)$result;
2065         }
2066
2067         /**
2068          *
2069          * @param string $s
2070          * @param int    $uid
2071          * @param array  $item
2072          * @param int    $cid
2073          * @return string
2074          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2075          * @throws \ImagickException
2076          */
2077         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2078         {
2079                 if (DI::config()->get('system', 'disable_embedded')) {
2080                         return $s;
2081                 }
2082
2083                 Logger::info('check for photos');
2084                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2085
2086                 $orig_body = $s;
2087                 $new_body = '';
2088
2089                 $img_start = strpos($orig_body, '[img');
2090                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2091                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2092
2093                 while (($img_st_close !== false) && ($img_len !== false)) {
2094                         $img_st_close++; // make it point to AFTER the closing bracket
2095                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2096
2097                         Logger::info('found photo', ['image' => $image]);
2098
2099                         if (stristr($image, $site . '/photo/')) {
2100                                 // Only embed locally hosted photos
2101                                 $replace = false;
2102                                 $i = basename($image);
2103                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2104                                 $x = strpos($i, '-');
2105
2106                                 if ($x) {
2107                                         $res = substr($i, $x + 1);
2108                                         $i = substr($i, 0, $x);
2109                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2110                                         if (DBA::isResult($photo)) {
2111                                                 /*
2112                                                  * Check to see if we should replace this photo link with an embedded image
2113                                                  * 1. No need to do so if the photo is public
2114                                                  * 2. If there's a contact-id provided, see if they're in the access list
2115                                                  *    for the photo. If so, embed it.
2116                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2117                                                  *    permissions, regardless of order but first check to see if they're an exact
2118                                                  *    match to save some processing overhead.
2119                                                  */
2120                                                 if (self::hasPermissions($photo)) {
2121                                                         if ($cid) {
2122                                                                 $recips = self::enumeratePermissions($photo);
2123                                                                 if (in_array($cid, $recips)) {
2124                                                                         $replace = true;
2125                                                                 }
2126                                                         } elseif ($item) {
2127                                                                 if (self::samePermissions($uid, $item, $photo)) {
2128                                                                         $replace = true;
2129                                                                 }
2130                                                         }
2131                                                 }
2132                                                 if ($replace) {
2133                                                         $photo_img = Photo::getImageForPhoto($photo);
2134                                                         // If a custom width and height were specified, apply before embedding
2135                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2136                                                                 Logger::info('scaling photo');
2137
2138                                                                 $width = intval($match[1]);
2139                                                                 $height = intval($match[2]);
2140
2141                                                                 $photo_img->scaleDown(max($width, $height));
2142                                                         }
2143
2144                                                         $data = $photo_img->asString();
2145                                                         $type = $photo_img->getType();
2146
2147                                                         Logger::info('replacing photo');
2148                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2149                                                         Logger::debug('replaced', ['image' => $image]);
2150                                                 }
2151                                         }
2152                                 }
2153                         }
2154
2155                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2156                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2157                         if ($orig_body === false) {
2158                                 $orig_body = '';
2159                         }
2160
2161                         $img_start = strpos($orig_body, '[img');
2162                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2163                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2164                 }
2165
2166                 $new_body = $new_body . $orig_body;
2167
2168                 return $new_body;
2169         }
2170
2171         private static function hasPermissions($obj)
2172         {
2173                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2174                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2175         }
2176
2177         private static function samePermissions($uid, $obj1, $obj2)
2178         {
2179                 // first part is easy. Check that these are exactly the same.
2180                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2181                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2182                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2183                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2184                         return true;
2185                 }
2186
2187                 // This is harder. Parse all the permissions and compare the resulting set.
2188                 $recipients1 = self::enumeratePermissions($obj1);
2189                 $recipients2 = self::enumeratePermissions($obj2);
2190                 sort($recipients1);
2191                 sort($recipients2);
2192
2193                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2194                 return ($recipients1 == $recipients2);
2195         }
2196
2197         /**
2198          * Returns an array of contact-ids that are allowed to see this object
2199          *
2200          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2201          * @param bool  $check_dead Prunes unavailable contacts from the result
2202          * @return array
2203          * @throws \Exception
2204          */
2205         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2206         {
2207                 $aclFormater = DI::aclFormatter();
2208
2209                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2210                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2211                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2212                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2213                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2214                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2215                 $recipients   = array_diff($recipients, $deny);
2216                 return $recipients;
2217         }
2218
2219         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2220         {
2221                 if (!$uid || ($days < 1)) {
2222                         return;
2223                 }
2224
2225                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2226                         $uid, GRAVITY_PARENT];
2227
2228                 /*
2229                  * $expire_network_only = save your own wall posts
2230                  * and just expire conversations started by others
2231                  */
2232                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2233
2234                 if ($expire_network_only) {
2235                         $condition[0] .= " AND NOT `wall`";
2236                 }
2237
2238                 if ($network != "") {
2239                         $condition[0] .= " AND `network` = ?";
2240                         $condition[] = $network;
2241                 }
2242
2243                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2244                 $condition[] = $days;
2245
2246                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2247
2248                 if (!DBA::isResult($items)) {
2249                         return;
2250                 }
2251
2252                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2253
2254                 // Forcing expiring of items - but not notes and marked items
2255                 if ($force) {
2256                         $expire_items = true;
2257                 }
2258
2259                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2260                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2261                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2262
2263                 $expired = 0;
2264
2265                 $priority = DI::config()->get('system', 'expire-notify-priority');
2266
2267                 while ($item = Post::fetch($items)) {
2268                         // don't expire filed items
2269                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2270                                 continue;
2271                         }
2272
2273                         // Only expire posts, not photos and photo comments
2274
2275                         if (!$expire_photos && !empty($item['resource-id'])) {
2276                                 continue;
2277                         } elseif (!$expire_starred && intval($item['starred'])) {
2278                                 continue;
2279                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2280                                 continue;
2281                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2282                                 continue;
2283                         }
2284
2285                         self::markForDeletionById($item['id'], $priority);
2286
2287                         ++$expired;
2288                 }
2289                 DBA::close($items);
2290                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2291         }
2292
2293         public static function firstPostDate($uid, $wall = false)
2294         {
2295                 $user = User::getById($uid, ['register_date']);
2296                 if (empty($user)) {
2297                         return false;
2298                 }
2299
2300                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2301                         $uid, $wall, $user['register_date']];
2302                 $params = ['order' => ['received' => false]];
2303                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2304                 if (DBA::isResult($thread)) {
2305                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2306                         return $postdate;
2307                 }
2308                 return false;
2309         }
2310
2311         /**
2312          * add/remove activity to an item
2313          *
2314          * Toggle activities as like,dislike,attend of an item
2315          *
2316          * @param int $item_id
2317          * @param string $verb
2318          *            Activity verb. One of
2319          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2320          *            attendno, unattendno, attendmaybe, unattendmaybe,
2321          *            announce, unannouce
2322          * @return bool
2323          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2324          * @throws \ImagickException
2325          * @hook  'post_local_end'
2326          *            array $arr
2327          *            'post_id' => ID of posted item
2328          */
2329         public static function performActivity(int $item_id, string $verb, int $uid)
2330         {
2331                 if (empty($uid)) {
2332                         return false;
2333                 }
2334
2335                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2336
2337                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2338                 if (!DBA::isResult($item)) {
2339                         Logger::log('like: unknown item ' . $item_id);
2340                         return false;
2341                 }
2342
2343                 $uri_id = $item['uri-id'];
2344
2345                 if (!in_array($item['uid'], [0, $uid])) {
2346                         return false;
2347                 }
2348
2349                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2350                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2351                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2352                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2353                                 if (!DBA::isResult($item)) {
2354                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2355                                         return false;
2356                                 }
2357                         }
2358                 }
2359
2360                 // Retrieves the local post owner
2361                 $owner = User::getOwnerDataById($uid);
2362                 if (empty($owner)) {
2363                         Logger::info('Empty owner for user', ['uid' => $uid]);
2364                         return false;
2365                 }
2366
2367                 // Retrieve the current logged in user's public contact
2368                 $author_id = Contact::getIdForURL($owner['url']);
2369                 if (empty($author_id)) {
2370                         Logger::info('Empty public contact');
2371                         return false;
2372                 }
2373
2374                 $activity = null;
2375                 switch ($verb) {
2376                         case 'like':
2377                         case 'unlike':
2378                                 $activity = Activity::LIKE;
2379                                 break;
2380                         case 'dislike':
2381                         case 'undislike':
2382                                 $activity = Activity::DISLIKE;
2383                                 break;
2384                         case 'attendyes':
2385                         case 'unattendyes':
2386                                 $activity = Activity::ATTEND;
2387                                 break;
2388                         case 'attendno':
2389                         case 'unattendno':
2390                                 $activity = Activity::ATTENDNO;
2391                                 break;
2392                         case 'attendmaybe':
2393                         case 'unattendmaybe':
2394                                 $activity = Activity::ATTENDMAYBE;
2395                                 break;
2396                         case 'follow':
2397                         case 'unfollow':
2398                                 $activity = Activity::FOLLOW;
2399                                 break;
2400                         case 'announce':
2401                         case 'unannounce':
2402                                 $activity = Activity::ANNOUNCE;
2403                                 break;
2404                         default:
2405                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2406                                 return false;
2407                 }
2408
2409                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2410
2411                 // Enable activity toggling instead of on/off
2412                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2413
2414                 // Look for an existing verb row
2415                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2416                 if ($event_verb_flag) {
2417                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2418
2419                         // Translate to the index based activity index
2420                         $vids = [];
2421                         foreach ($verbs as $verb) {
2422                                 $vids[] = Verb::getID($verb);
2423                         }
2424                 } else {
2425                         $vids = Verb::getID($activity);
2426                 }
2427
2428                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2429                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2430                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2431
2432                 if (DBA::isResult($like_item)) {
2433                         /**
2434                          * Truth table for existing activities
2435                          *
2436                          * |          Inputs            ||      Outputs      |
2437                          * |----------------------------||-------------------|
2438                          * |  Mode  | Event | Same verb || Delete? | Return? |
2439                          * |--------|-------|-----------||---------|---------|
2440                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2441                          * | create |  Yes  |    No     ||   Yes   |   No    |
2442                          * | create |  No   |    Yes    ||   No    |   Yes   |
2443                          * | create |  No   |    No     ||        N/A†       |
2444                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2445                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2446                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2447                          * | delete |  No   |    No     ||        N/A†       |
2448                          * |--------|-------|-----------||---------|---------|
2449                          * |   A    |   B   |     C     || A xor C | !B or C |
2450                          *
2451                          * † Can't happen: It's impossible to find an existing non-event activity without
2452                          *                 the same verb because we are only looking for this single verb.
2453                          *
2454                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2455                          */
2456                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2457                                 self::markForDeletionById($like_item['id']);
2458                         }
2459
2460                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2461                                 return true;
2462                         }
2463                 }
2464
2465                 // No need to go further if we aren't creating anything
2466                 if ($mode == 'delete') {
2467                         return true;
2468                 }
2469
2470                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2471
2472                 $new_item = [
2473                         'guid'          => System::createUUID(),
2474                         'uri'           => self::newURI($item['uid']),
2475                         'uid'           => $item['uid'],
2476                         'contact-id'    => $owner['id'],
2477                         'wall'          => $item['wall'],
2478                         'origin'        => 1,
2479                         'network'       => Protocol::DFRN,
2480                         'protocol'      => Conversation::PARCEL_DIRECT,
2481                         'direction'     => Conversation::PUSH,
2482                         'gravity'       => GRAVITY_ACTIVITY,
2483                         'parent'        => $item['id'],
2484                         'thr-parent'    => $item['uri'],
2485                         'owner-id'      => $author_id,
2486                         'author-id'     => $author_id,
2487                         'body'          => $activity,
2488                         'verb'          => $activity,
2489                         'object-type'   => $objtype,
2490                         'allow_cid'     => $item['allow_cid'],
2491                         'allow_gid'     => $item['allow_gid'],
2492                         'deny_cid'      => $item['deny_cid'],
2493                         'deny_gid'      => $item['deny_gid'],
2494                         'visible'       => 1,
2495                         'unseen'        => 1,
2496                 ];
2497
2498                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2499                 if (!empty($signed)) {
2500                         $new_item['diaspora_signed_text'] = json_encode($signed);
2501                 }
2502
2503                 $new_item_id = self::insert($new_item);
2504
2505                 // If the parent item isn't visible then set it to visible
2506                 if (!$item['visible']) {
2507                         self::update(['visible' => true], ['id' => $item['id']]);
2508                 }
2509
2510                 $new_item['id'] = $new_item_id;
2511
2512                 Hook::callAll('post_local_end', $new_item);
2513
2514                 return true;
2515         }
2516
2517         /**
2518          * Fetch the SQL condition for the given user id
2519          *
2520          * @param integer $owner_id User ID for which the permissions should be fetched
2521          * @return array condition
2522          */
2523         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2524         {
2525                 $local_user = local_user();
2526                 $remote_user = Session::getRemoteContactID($owner_id);
2527
2528                 // default permissions - anonymous user
2529                 $condition = ["`private` != ?", self::PRIVATE];
2530
2531                 if ($local_user && ($local_user == $owner_id)) {
2532                         // Profile owner - everything is visible
2533                         $condition = [];
2534                 } elseif ($remote_user) {
2535                          // Authenticated visitor - fetch the matching permissionsets
2536                         $set = PermissionSet::get($owner_id, $remote_user);
2537                         if (!empty($set)) {
2538                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2539                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2540                                         self::PRIVATE, self::PRIVATE];
2541                                 $condition = array_merge($condition, $set);
2542                         }
2543                 }
2544
2545                 return $condition;
2546         }
2547
2548         /**
2549          * Get a permission SQL string for the given user
2550          *
2551          * @param int $owner_id
2552          * @param string $table
2553          * @return string
2554          */
2555         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2556         {
2557                 $local_user = local_user();
2558                 $remote_user = Session::getRemoteContactID($owner_id);
2559
2560                 if (!empty($table)) {
2561                         $table = DBA::quoteIdentifier($table) . '.';
2562                 }
2563
2564                 /*
2565                  * Construct permissions
2566                  *
2567                  * default permissions - anonymous user
2568                  */
2569                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2570
2571                 // Profile owner - everything is visible
2572                 if ($local_user && ($local_user == $owner_id)) {
2573                         $sql = '';
2574                 } elseif ($remote_user) {
2575                         /*
2576                          * Authenticated visitor. Unless pre-verified,
2577                          * check that the contact belongs to this $owner_id
2578                          * and load the groups the visitor belongs to.
2579                          * If pre-verified, the caller is expected to have already
2580                          * done this and passed the groups into this function.
2581                          */
2582                         $set = PermissionSet::get($owner_id, $remote_user);
2583
2584                         if (!empty($set)) {
2585                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
2586                         } else {
2587                                 $sql_set = '';
2588                         }
2589
2590                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2591                 }
2592
2593                 return $sql;
2594         }
2595
2596         /**
2597          * get translated item type
2598          *
2599          * @param array                $item
2600          * @param \Friendica\Core\L10n $l10n
2601          * @return string
2602          */
2603         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2604         {
2605                 if (!empty($item['event-id'])) {
2606                         return $l10n->t('event');
2607                 } elseif (!empty($item['resource-id'])) {
2608                         return $l10n->t('photo');
2609                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2610                         return $l10n->t('activity');
2611                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2612                         return $l10n->t('comment');
2613                 }
2614
2615                 return $l10n->t('post');
2616         }
2617
2618         /**
2619          * Sets the "rendered-html" field of the provided item
2620          *
2621          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2622          *
2623          * @param array $item
2624          *
2625          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2626          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2627          */
2628         public static function putInCache(&$item)
2629         {
2630                 // Save original body to prevent addons to modify it
2631                 $body = $item['body'];
2632
2633                 $rendered_hash = $item['rendered-hash'] ?? '';
2634                 $rendered_html = $item['rendered-html'] ?? '';
2635
2636                 if ($rendered_hash == ''
2637                         || $rendered_html == ''
2638                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2639                         || DI::config()->get('system', 'ignore_cache')
2640                 ) {
2641                         self::addRedirToImageTags($item);
2642
2643                         $item['rendered-html'] = BBCode::convert($item['body']);
2644                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2645
2646                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2647                         Hook::callAll('put_item_in_cache', $hook_data);
2648                         $item['rendered-html'] = $hook_data['rendered-html'];
2649                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2650                         unset($hook_data);
2651
2652                         // Update if the generated values differ from the existing ones
2653                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2654                                 self::update(
2655                                         [
2656                                                 'rendered-html' => $item['rendered-html'],
2657                                                 'rendered-hash' => $item['rendered-hash']
2658                                         ],
2659                                         ['id' => $item['id']]
2660                                 );
2661                         }
2662                 }
2663
2664                 $item['body'] = $body;
2665         }
2666
2667         /**
2668          * Find any non-embedded images in private items and add redir links to them
2669          *
2670          * @param array &$item The field array of an item row
2671          */
2672         private static function addRedirToImageTags(array &$item)
2673         {
2674                 $app = DI::app();
2675
2676                 $matches = [];
2677                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2678                 if ($cnt) {
2679                         foreach ($matches as $mtch) {
2680                                 if (strpos($mtch[1], '/redir') !== false) {
2681                                         continue;
2682                                 }
2683
2684                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
2685                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2686                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2687                                 }
2688                         }
2689                 }
2690         }
2691
2692         /**
2693          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2694          * If attach is true, also add icons for item attachments.
2695          *
2696          * @param array   $item
2697          * @param boolean $attach
2698          * @param boolean $is_preview
2699          * @return string item body html
2700          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2701          * @throws \ImagickException
2702          * @hook  prepare_body_init item array before any work
2703          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2704          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2705          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2706          */
2707         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2708         {
2709                 $a = DI::app();
2710                 Hook::callAll('prepare_body_init', $item);
2711
2712                 // In order to provide theme developers more possibilities, event items
2713                 // are treated differently.
2714                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2715                         $ev = Event::getItemHTML($item);
2716                         return $ev;
2717                 }
2718
2719                 $tags = Tag::populateFromItem($item);
2720
2721                 $item['tags'] = $tags['tags'];
2722                 $item['hashtags'] = $tags['hashtags'];
2723                 $item['mentions'] = $tags['mentions'];
2724
2725                 // Compile eventual content filter reasons
2726                 $filter_reasons = [];
2727                 if (!$is_preview && public_contact() != $item['author-id']) {
2728                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2729                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2730                         }
2731
2732                         $hook_data = [
2733                                 'item' => $item,
2734                                 'filter_reasons' => $filter_reasons
2735                         ];
2736                         Hook::callAll('prepare_body_content_filter', $hook_data);
2737                         $filter_reasons = $hook_data['filter_reasons'];
2738                         unset($hook_data);
2739                 }
2740
2741                 $body = $item['body'] ?? '';
2742                 $shared = BBCode::fetchShareAttributes($body);
2743                 if (!empty($shared['guid'])) {
2744                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2745                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2746                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2747                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2748                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2749                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2750                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2751                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2752                 } else {
2753                         $shared_uri_id = 0;
2754                         $shared_links = [];
2755                 }
2756                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2757                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2758                 $item['body'] = Post\Link::insertFromBody($item['uri-id'], $item['body']);
2759
2760                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2761                 self::putInCache($item);
2762                 $item['body'] = $body;
2763                 $s = $item["rendered-html"];
2764
2765                 $hook_data = [
2766                         'item' => $item,
2767                         'html' => $s,
2768                         'preview' => $is_preview,
2769                         'filter_reasons' => $filter_reasons
2770                 ];
2771                 Hook::callAll('prepare_body', $hook_data);
2772                 $s = $hook_data['html'];
2773                 unset($hook_data);
2774
2775                 if (!$attach) {
2776                         // Replace the blockquotes with quotes that are used in mails.
2777                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2778                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2779                         return $s;
2780                 }
2781
2782                 if (!empty($shared_attachments)) {
2783                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2784                         $s = self::addLinkAttachment($shared_uri_id, $shared_attachments, $body, $s, true, []);
2785                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2786                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2787                 }
2788
2789                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2790                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2791                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2792
2793                 // Map.
2794                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2795                         $x = Map::byCoordinates(trim($item['coord']));
2796                         if ($x) {
2797                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2798                         }
2799                 }
2800
2801                 // Replace friendica image url size with theme preference.
2802                 if (!empty($a->theme_info['item_image_size'])) {
2803                         $ps = $a->theme_info['item_image_size'];
2804                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2805                 }
2806
2807                 $s = HTML::applyContentFilter($s, $filter_reasons);
2808
2809                 $hook_data = ['item' => $item, 'html' => $s];
2810                 Hook::callAll('prepare_body_final', $hook_data);
2811
2812                 return $hook_data['html'];
2813         }
2814
2815         /**
2816          * Check if the body contains a link
2817          *
2818          * @param string $body
2819          * @param string $url
2820          * @param int    $type
2821          * @return bool
2822          */
2823         public static function containsLink(string $body, string $url, int $type = 0)
2824         {
2825                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2826                 $urlparts = parse_url($url);
2827                 unset($urlparts['query']);
2828                 unset($urlparts['fragment']);
2829                 $url = Network::unparseURL($urlparts);
2830
2831                 // Remove media links to only search in embedded content
2832                 // @todo Check images for image link, audio for audio links, ...
2833                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2834                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2835                 }
2836
2837                 if (strpos($body, $url)) {
2838                         return true;
2839                 }
2840                 foreach ([0, 1, 2] as $size) {
2841                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2842                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2843                                 return true;
2844                         }
2845                 }
2846                 return false;
2847         }
2848
2849         /**
2850          * Replace visual attachments in the body
2851          *
2852          * @param array $attachments
2853          * @param string $body
2854          * @return string modified body
2855          */
2856         private static function replaceVisualAttachments(array $attachments, string $body)
2857         {
2858                 $stamp1 = microtime(true);
2859
2860                 foreach ($attachments['visual'] as $attachment) {
2861                         if (!empty($attachment['preview'])) {
2862                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2863                         } elseif ($attachment['filetype'] == 'image') {
2864                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2865                         }
2866                 }
2867                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2868                 return $body;
2869         }
2870
2871         /**
2872          * Add visual attachments to the content
2873          *
2874          * @param array $attachments
2875          * @param array $item
2876          * @param string $content
2877          * @return string modified content
2878          */
2879         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2880         {
2881                 $stamp1 = microtime(true);
2882                 $leading = '';
2883                 $trailing = '';
2884
2885                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2886                 foreach ($attachments['visual'] as $attachment) {
2887                         if (self::containsLink($item['body'], $attachment['url'], $attachment['type'])) {
2888                                 continue;
2889                         }
2890
2891                         if (!empty($attachment['preview'])) {
2892                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2893                         } else {
2894                                 $preview_url = '';
2895                         }
2896
2897                         if (($attachment['filetype'] == 'video')) {
2898                                 /// @todo Move the template to /content as well
2899                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2900                                         '$video' => [
2901                                                 'id'      => $attachment['id'],
2902                                                 'src'     => $attachment['url'],
2903                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2904                                                 'preview' => $preview_url,
2905                                                 'mime'    => $attachment['mimetype'],
2906                                         ],
2907                                 ]);
2908                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2909                                         $leading .= $media;
2910                                 } else {
2911                                         $trailing .= $media;
2912                                 }
2913                         } elseif ($attachment['filetype'] == 'audio') {
2914                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2915                                         '$audio' => [
2916                                                 'id'     => $attachment['id'],
2917                                                 'src'    => $attachment['url'],
2918                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2919                                                 'mime'   => $attachment['mimetype'],
2920                                         ],
2921                                 ]);
2922                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2923                                         $leading .= $media;
2924                                 } else {
2925                                         $trailing .= $media;
2926                                 }
2927                         } elseif ($attachment['filetype'] == 'image') {
2928                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2929                                         '$image' => [
2930                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2931                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2932                                                 'attachment' => $attachment,
2933                                         ],
2934                                 ]);
2935                                 // On Diaspora posts the attached pictures are leading
2936                                 if ($item['network'] == Protocol::DIASPORA) {
2937                                         $leading .= $media;
2938                                 } else {
2939                                         $trailing .= $media;
2940                                 }
2941                         }
2942                 }
2943
2944                 if ($shared) {
2945                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2946                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2947                 } else {
2948                         if ($leading != '') {
2949                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2950                         }
2951
2952                         if ($trailing != '') {
2953                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2954                         }
2955                 }
2956
2957                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2958                 return $content;
2959         }
2960
2961         /**
2962          * Add link attachment to the content
2963          *
2964          * @param array  $attachments
2965          * @param string $body
2966          * @param string $content
2967          * @param bool   $shared
2968          * @param array  $ignore_links A list of URLs to ignore
2969          * @return string modified content
2970          */
2971         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2972         {
2973                 $stamp1 = microtime(true);
2974                 // @ToDo Check only for audio and video
2975                 $preview = empty($attachments['visual']);
2976
2977                 if (!empty($attachments['link'])) {
2978                         foreach ($attachments['link'] as $link) {
2979                                 $found = false;
2980                                 foreach ($ignore_links as $ignore_link) {
2981                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2982                                                 $found = true;
2983                                         }
2984                                 }
2985                                 // @todo Judge between the links to use the one with most information
2986                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
2987                                         (empty($attachment['name']) && !empty($link['name'])) ||
2988                                         (empty($attachment['description']) && !empty($link['description'])) ||
2989                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
2990                                         $attachment = $link;
2991                                 }
2992                         }
2993                 }
2994
2995                 if (!empty($attachment)) {
2996                         $data = [
2997                                 'after' => '',
2998                                 'author_name' => $attachment['author-name'] ?? '',
2999                                 'author_url' =>  $attachment['author-url'] ?? '',
3000                                 'description' => $attachment['description'] ?? '',
3001                                 'image' => '',
3002                                 'preview' => '',
3003                                 'provider_name' => $attachment['publisher-name'] ?? '',
3004                                 'provider_url' => $attachment['publisher-url'] ?? '',
3005                                 'text' => '',
3006                                 'title' => $attachment['name'] ?? '',
3007                                 'type' => 'link',
3008                                 'url' => $attachment['url']];
3009
3010                         if ($preview && !empty($attachment['preview'])) {
3011                                 if ($attachment['preview-width'] >= 500) {
3012                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3013                                 } else {
3014                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3015                                 }
3016                         }
3017
3018                         if (!empty($data['description']) && !empty($content)) {
3019                                 similar_text($data['description'], $content, $percent);
3020                         } else {
3021                                 $percent = 0;
3022                         }
3023
3024                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3025                                 $data['description'] = '';
3026                         }
3027
3028                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3029                                 $data['author_name'] = '';
3030                         }
3031
3032                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3033                                 $data['author_url'] = '';
3034                         }
3035                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3036                         $data = BBCode::getAttachmentData($match[1]);
3037                 }
3038                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3039
3040                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3041                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3042                                 $parts = parse_url($data['url']);
3043                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3044                                         if (empty($data['provider_name'])) {
3045                                                 $data['provider_name'] = $parts['host'];
3046                                         }
3047                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3048                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3049
3050                                                 if (!empty($parts['port'])) {
3051                                                         $data['provider_url'] .= ':' . $parts['port'];
3052                                                 }
3053                                         }
3054                                 }
3055
3056                                 if (!empty($data['image'])) {
3057                                         $data['image']   = Post\Link::getByLink($uriid, $data['image']);
3058                                 }
3059
3060                                 if (!empty($data['preview'])) {
3061                                         $data['preview'] = Post\Link::getByLink($uriid, $data['preview']);
3062                                 }
3063
3064                                 // @todo Use a template
3065                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data);
3066                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3067                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3068                                         '$url'  => $data['url'],
3069                                         '$title' => $data['title'],
3070                                 ]);
3071                         } else {
3072                                 return $content;
3073                         }
3074
3075                         if ($shared) {
3076                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3077                         } else {
3078                                 return $content . $rendered;
3079                         }
3080                 }
3081                 return $content;
3082         }
3083
3084         /**
3085          * Add non visual attachments to the content
3086          *
3087          * @param array $attachments
3088          * @param array $item
3089          * @param string $content
3090          * @return string modified content
3091          */
3092         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3093         {
3094                 $stamp1 = microtime(true);
3095                 $trailing = '';
3096                 foreach ($attachments['additional'] as $attachment) {
3097                         if (strpos($item['body'], $attachment['url'])) {
3098                                 continue;
3099                         }
3100
3101                         $author = ['uid' => 0, 'id' => $item['author-id'],
3102                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3103                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3104
3105                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3106
3107                         if (!empty($attachment['size'])) {
3108                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3109                         }
3110
3111                         /// @todo Use a template
3112                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3113                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3114                 }
3115
3116                 if ($trailing != '') {
3117                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3118                 }
3119
3120                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3121                 return $content;
3122         }
3123
3124         /**
3125          * get private link for item
3126          *
3127          * @param array $item
3128          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3129          * @throws \Exception
3130          */
3131         public static function getPlink($item)
3132         {
3133                 if (local_user()) {
3134                         $ret = [
3135                                 'href' => "display/" . $item['guid'],
3136                                 'orig' => "display/" . $item['guid'],
3137                                 'title' => DI::l10n()->t('View on separate page'),
3138                                 'orig_title' => DI::l10n()->t('View on separate page'),
3139                         ];
3140
3141                         if (!empty($item['plink'])) {
3142                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3143                                 $ret['title'] = DI::l10n()->t('Link to source');
3144                         }
3145                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3146                         $ret = [
3147                                 'href' => $item['plink'],
3148                                 'orig' => $item['plink'],
3149                                 'title' => DI::l10n()->t('Link to source'),
3150                                 'orig_title' => DI::l10n()->t('Link to source'),
3151                         ];
3152                 } else {
3153                         $ret = [];
3154                 }
3155
3156                 return $ret;
3157         }
3158
3159         /**
3160          * Is the given item array a post that is sent as starting post to a forum?
3161          *
3162          * @param array $item
3163          * @param array $owner
3164          *
3165          * @return boolean "true" when it is a forum post
3166          */
3167         public static function isForumPost(array $item, array $owner = [])
3168         {
3169                 if (empty($owner)) {
3170                         $owner = User::getOwnerDataById($item['uid']);
3171                         if (empty($owner)) {
3172                                 return false;
3173                         }
3174                 }
3175
3176                 if (($item['author-id'] == $item['owner-id']) ||
3177                         ($owner['id'] == $item['contact-id']) ||
3178                         ($item['uri-id'] != $item['parent-uri-id']) ||
3179                         $item['origin']) {
3180                         return false;
3181                 }
3182
3183                 return Contact::isForum($item['contact-id']);
3184         }
3185
3186         /**
3187          * Search item id for given URI or plink
3188          *
3189          * @param string $uri
3190          * @param integer $uid
3191          *
3192          * @return integer item id
3193          */
3194         public static function searchByLink($uri, $uid = 0)
3195         {
3196                 $ssl_uri = str_replace('http://', 'https://', $uri);
3197                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3198
3199                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3200                 if (DBA::isResult($item)) {
3201                         return $item['id'];
3202                 }
3203
3204                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3205                 if (DBA::isResult($item)) {
3206                         return $item['id'];
3207                 }
3208
3209                 return 0;
3210         }
3211
3212         /**
3213          * Return the URI for a link to the post
3214          *
3215          * @param string $uri URI or link to post
3216          *
3217          * @return string URI
3218          */
3219         public static function getURIByLink(string $uri)
3220         {
3221                 $ssl_uri = str_replace('http://', 'https://', $uri);
3222                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3223
3224                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3225                 if (DBA::isResult($item)) {
3226                         return $item['uri'];
3227                 }
3228
3229                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3230                 if (DBA::isResult($item)) {
3231                         return $item['uri'];
3232                 }
3233
3234                 return '';
3235         }
3236
3237         /**
3238          * Fetches item for given URI or plink
3239          *
3240          * @param string $uri
3241          * @param integer $uid
3242          *
3243          * @return integer item id
3244          */
3245         public static function fetchByLink(string $uri, int $uid = 0)
3246         {
3247                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3248                 $item_id = self::searchByLink($uri, $uid);
3249                 if (!empty($item_id)) {
3250                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3251                         return $item_id;
3252                 }
3253
3254                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3255                         $item_id = self::searchByLink($fetched_uri, $uid);
3256                 } else {
3257                         $item_id = Diaspora::fetchByURL($uri);
3258                 }
3259
3260                 if (!empty($item_id)) {
3261                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3262                         return $item_id;
3263                 }
3264
3265                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3266                 return 0;
3267         }
3268
3269         /**
3270          * Return share data from an item array (if the item is shared item)
3271          * We are providing the complete Item array, because at some time in the future
3272          * we hopefully will define these values not in the body anymore but in some item fields.
3273          * This function is meant to replace all similar functions in the system.
3274          *
3275          * @param array $item
3276          *
3277          * @return array with share information
3278          */
3279         public static function getShareArray($item)
3280         {
3281                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3282                         return [];
3283                 }
3284
3285                 $attribute_string = $matches[2];
3286                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3287                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3288                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3289                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3290                         }
3291                 }
3292                 return $attributes;
3293         }
3294
3295         /**
3296          * Fetch item information for shared items from the original items and adds it.
3297          *
3298          * @param array $item
3299          *
3300          * @return array item array with data from the original item
3301          */
3302         public static function addShareDataFromOriginal(array $item)
3303         {
3304                 $shared = self::getShareArray($item);
3305                 if (empty($shared)) {
3306                         return $item;
3307                 }
3308
3309                 // Real reshares always have got a GUID.
3310                 if (empty($shared['guid'])) {
3311                         return $item;
3312                 }
3313
3314                 $uid = $item['uid'] ?? 0;
3315
3316                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3317                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3318                 if (!DBA::isResult($shared_item)) {
3319                         if (empty($shared['link'])) {
3320                                 return $item;
3321                         }
3322
3323                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3324                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3325                         if (empty($id)) {
3326                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3327                                 return $item;
3328                         }
3329
3330                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3331                         if (!DBA::isResult($shared_item)) {
3332                                 return $item;
3333                         }
3334                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3335                 } else {
3336                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3337                 }
3338
3339                 if (!empty($shared_item['title'])) {
3340                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3341                         unset($shared_item['title']);
3342                 } else {
3343                         $body = $shared_item['body'];
3344                 }
3345
3346                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3347                 unset($shared_item['body']);
3348
3349                 return array_merge($item, $shared_item);
3350         }
3351
3352         /**
3353          * Check a prospective item array against user-level permissions
3354          *
3355          * @param array $item Expected keys: uri, gravity, and
3356          *                    author-link if is author-id is set,
3357          *                    owner-link if is owner-id is set,
3358          *                    causer-link if is causer-id is set.
3359          * @param int   $user_id Local user ID
3360          * @return bool
3361          * @throws \Exception
3362          */
3363         protected static function isAllowedByUser(array $item, int $user_id)
3364         {
3365                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3366                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3367                         return false;
3368                 }
3369
3370                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3371                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3372                         return false;
3373                 }
3374
3375                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3376                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3377                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3378                         return false;
3379                 }
3380
3381                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3382                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3383                         return false;
3384                 }
3385
3386                 return true;
3387         }
3388
3389         /**
3390          * Improve the data in shared posts
3391          *
3392          * @param array $item
3393          * @return string body
3394          */
3395         public static function improveSharedDataInBody(array $item)
3396         {
3397                 $shared = BBCode::fetchShareAttributes($item['body']);
3398                 if (empty($shared['link'])) {
3399                         return $item['body'];
3400                 }
3401
3402                 $id = self::fetchByLink($shared['link']);
3403                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3404                 if (!$id) {
3405                         return $item['body'];
3406                 }
3407
3408                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3409                 if (!DBA::isResult($shared_item)) {
3410                         return $item['body'];
3411                 }
3412
3413                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3414
3415                 if (!empty($shared_item['title'])) {
3416                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3417                 }
3418
3419                 $shared_content .= $shared_item['body'];
3420
3421                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3422                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3423                 return $item['body'];
3424         }
3425 }