src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, 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_POLL = 33;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Posting reasons (Why had a post been stored for a user?)
  63         const PR_NONE = 0;
  64         const PR_TAG = 64;
  65         const PR_TO = 65;
  66         const PR_CC = 66;
  67         const PR_BTO = 67;
  68         const PR_BCC = 68;
  69         const PR_FOLLOWER = 69;
  70         const PR_ANNOUNCEMENT = 70;
  71         const PR_COMMENT = 71;
  72         const PR_STORED = 72;
  73         const PR_GLOBAL = 73;
  74         const PR_RELAY = 74;
  75         const PR_FETCHED = 75;
  76
  77         // Field list that is used to display the items
  78         const DISPLAY_FIELDLIST = [
  79                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  80                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  81                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  82                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  83                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  84                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  85                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  86                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  87                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  88                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  89                 'writable', 'self', 'cid', 'alias',
  90                 'event-created', 'event-edited', 'event-start', 'event-finish',
  91                 'event-summary', 'event-desc', 'event-location', 'event-type',
  92                 'event-nofinish', 'event-ignore', 'event-id',
  93                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  94         ];
  95
  96         // Field list that is used to deliver items via the protocols
  97         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  98                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  99                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 100                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 101                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 102                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 103                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'forum_mode', 'origin',
 104                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 105                         'event-created', 'event-edited', 'event-start', 'event-finish',
 106                         'event-summary', 'event-desc', 'event-location', 'event-type',
 107                         'event-nofinish', 'event-ignore', 'event-id'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 116                         'private', 'pubmail', 'visible', 'starred',
 117                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         /**
 136          * Update existing item entries
 137          *
 138          * @param array $fields    The fields that are to be changed
 139          * @param array $condition The condition for finding the item entries
 140          *
 141          * In the future we may have to change permissions as well.
 142          * Then we had to add the user id as third parameter.
 143          *
 144          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 145          *
 146          * @return integer|boolean number of affected rows - or "false" if there was an error
 147          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 148          */
 149         public static function update(array $fields, array $condition)
 150         {
 151                 if (empty($condition) || empty($fields)) {
 152                         return false;
 153                 }
 154
 155                 if (isset($fields['extid'])) {
 156                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 157                 }
 158
 159                 if (!empty($fields['verb'])) {
 160                         $fields['vid'] = Verb::getID($fields['verb']);
 161                 }
 162
 163                 if (!empty($fields['edited'])) {
 164                         $previous = Post::selectFirst(['edited'], $condition);
 165                 }
 166
 167                 $rows = Post::update($fields, $condition);
 168                 if (is_bool($rows)) {
 169                         return $rows;
 170                 }
 171
 172                 // We only need to call the line by line update for specific fields
 173                 if (empty($fields['body']) && empty($fields['file']) &&
 174                         empty($fields['attach']) && empty($fields['edited'])) {
 175                         return $rows;
 176                 }
 177
 178                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 179
 180                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 181
 182                 $notify_items = [];
 183
 184                 while ($item = DBA::fetch($items)) {
 185                         if (!empty($fields['body'])) {
 186                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 187
 188                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 189
 190                                 // Remove all media attachments from the body and store them in the post-media table
 191                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 192                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 193                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 194
 195                                 if ($item['author-network'] != Protocol::DFRN) {
 196                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 197                                 }
 198
 199                                 Post\Content::update($item['uri-id'], $content_fields);
 200                         }
 201
 202                         if (!empty($fields['file'])) {
 203                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 204                         }
 205
 206                         if (!empty($fields['attach'])) {
 207                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 208                         }
 209
 210                         // We only need to notfiy others when it is an original entry from us.
 211                         // Only call the notifier when the item had been edited and records had been changed.
 212                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 213                                 $notify_items[] = $item['id'];
 214                         }
 215                 }
 216
 217                 DBA::close($items);
 218
 219                 foreach ($notify_items as $notify_item) {
 220                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 221                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 222                 }
 223
 224                 return $rows;
 225         }
 226
 227         /**
 228          * Delete an item and notify others about it - if it was ours
 229          *
 230          * @param array   $condition The condition for finding the item entries
 231          * @param integer $priority  Priority for the notification
 232          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 233          */
 234         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 235         {
 236                 $items = Post::select(['id'], $condition);
 237                 while ($item = Post::fetch($items)) {
 238                         self::markForDeletionById($item['id'], $priority);
 239                 }
 240                 DBA::close($items);
 241         }
 242
 243         /**
 244          * Delete an item for an user and notify others about it - if it was ours
 245          *
 246          * @param array   $condition The condition for finding the item entries
 247          * @param integer $uid       User who wants to delete this item
 248          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 249          */
 250         public static function deleteForUser($condition, $uid)
 251         {
 252                 if ($uid == 0) {
 253                         return;
 254                 }
 255
 256                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 257                 while ($item = Post::fetch($items)) {
 258                         if (in_array($item['uid'], [$uid, 0])) {
 259                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 260                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 261                         }
 262
 263                         if ($item['uid'] == $uid) {
 264                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 265                         } elseif ($item['uid'] != 0) {
 266                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 267                         }
 268                 }
 269                 DBA::close($items);
 270         }
 271
 272         /**
 273          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 274          *
 275          * @param integer $item_id
 276          * @param integer $priority Priority for the notification
 277          *
 278          * @return boolean success
 279          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 280          */
 281         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 282         {
 283                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 284                 // locate item to be deleted
 285                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 286                         'deleted', 'resource-id', 'event-id',
 287                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 288                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 289                 if (!DBA::isResult($item)) {
 290                         Logger::info('Item not found.', ['id' => $item_id]);
 291                         return false;
 292                 }
 293
 294                 if ($item['deleted']) {
 295                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 296                         return false;
 297                 }
 298
 299                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 300                 if (!DBA::isResult($parent)) {
 301                         $parent = ['origin' => false];
 302                 }
 303
 304                 // clean up categories and tags so they don't end up as orphans
 305                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 306
 307                 /*
 308                  * If item is a link to a photo resource, nuke all the associated photos
 309                  * (visitors will not have photo resources)
 310                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 311                  * generate a resource-id and therefore aren't intimately linked to the item.
 312                  */
 313                 /// @TODO: this should first check if photo is used elsewhere
 314                 if (strlen($item['resource-id'])) {
 315                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 316                 }
 317
 318                 // If item is a link to an event, delete the event.
 319                 if (intval($item['event-id'])) {
 320                         Event::delete($item['event-id']);
 321                 }
 322
 323                 // If item has attachments, drop them
 324                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 325                 foreach($attachments as $attachment) {
 326                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 327                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 328                         }
 329                 }
 330
 331                 // Set the item to "deleted"
 332                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 333                 Post::update($item_fields, ['id' => $item['id']]);
 334
 335                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 336
 337                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 338                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 339                 }
 340
 341                 Post\DeliveryData::delete($item['uri-id']);
 342
 343                 // If it's the parent of a comment thread, kill all the kids
 344                 if ($item['gravity'] == GRAVITY_PARENT) {
 345                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 346                 }
 347
 348                 // Is it our comment and/or our thread?
 349                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 350                         // When we delete the original post we will delete all existing copies on the server as well
 351                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 352
 353                         // send the notification upstream/downstream
 354                         if ($priority) {
 355                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 356                         }
 357                 } elseif ($item['uid'] != 0) {
 358                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 359                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 360                 }
 361
 362                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 363
 364                 return true;
 365         }
 366
 367         public static function guid($item, $notify)
 368         {
 369                 if (!empty($item['guid'])) {
 370                         return trim($item['guid']);
 371                 }
 372
 373                 if ($notify) {
 374                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 375                         // We add the hash of our own host because our host is the original creator of the post.
 376                         $prefix_host = DI::baseUrl()->getHostname();
 377                 } else {
 378                         $prefix_host = '';
 379
 380                         // We are only storing the post so we create a GUID from the original hostname.
 381                         if (!empty($item['author-link'])) {
 382                                 $parsed = parse_url($item['author-link']);
 383                                 if (!empty($parsed['host'])) {
 384                                         $prefix_host = $parsed['host'];
 385                                 }
 386                         }
 387
 388                         if (empty($prefix_host) && !empty($item['plink'])) {
 389                                 $parsed = parse_url($item['plink']);
 390                                 if (!empty($parsed['host'])) {
 391                                         $prefix_host = $parsed['host'];
 392                                 }
 393                         }
 394
 395                         if (empty($prefix_host) && !empty($item['uri'])) {
 396                                 $parsed = parse_url($item['uri']);
 397                                 if (!empty($parsed['host'])) {
 398                                         $prefix_host = $parsed['host'];
 399                                 }
 400                         }
 401
 402                         // Is it in the format data@host.tld? - Used for mail contacts
 403                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 404                                 $mailparts = explode('@', $item['author-link']);
 405                                 $prefix_host = array_pop($mailparts);
 406                         }
 407                 }
 408
 409                 if (!empty($item['plink'])) {
 410                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 411                 } elseif (!empty($item['uri'])) {
 412                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 413                 } else {
 414                         $guid = System::createUUID(hash('crc32', $prefix_host));
 415                 }
 416
 417                 return $guid;
 418         }
 419
 420         private static function contactId($item)
 421         {
 422                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 423                         return $item['contact-id'];
 424                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 425                         return $item['contact-id'];
 426                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 427                         return $item['author-id'];
 428                 } elseif (!empty($item['contact-id'])) {
 429                         return $item['contact-id'];
 430                 } else {
 431                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 432                         if (!empty($contact_id)) {
 433                                 return $contact_id;
 434                         }
 435                 }
 436                 return $item['author-id'];
 437         }
 438
 439         /**
 440          * Write an item array into a spool file to be inserted later.
 441          * This command is called whenever there are issues storing an item.
 442          *
 443          * @param array $item The item fields that are to be inserted
 444          * @throws \Exception
 445          */
 446         private static function spool($orig_item)
 447         {
 448                 // Now we store the data in the spool directory
 449                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 450                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 451
 452                 $spoolpath = System::getSpoolPath();
 453                 if ($spoolpath != "") {
 454                         $spool = $spoolpath . '/' . $file;
 455
 456                         file_put_contents($spool, json_encode($orig_item));
 457                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 458                 }
 459         }
 460
 461         /**
 462          * Check if the item array is a duplicate
 463          *
 464          * @param array $item
 465          * @return boolean is it a duplicate?
 466          */
 467         private static function isDuplicate(array $item)
 468         {
 469                 // Checking if there is already an item with the same guid
 470                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 471                 if (Post::exists($condition)) {
 472                         Logger::notice('Found already existing item', $condition);
 473                         return true;
 474                 }
 475
 476                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 477                         'network' => [$item['network'], Protocol::DFRN]];
 478                 if (Post::exists($condition)) {
 479                         Logger::notice('duplicated item with the same uri found.', $condition);
 480                         return true;
 481                 }
 482
 483                 // On Friendica and Diaspora the GUID is unique
 484                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 485                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 486                         if (Post::exists($condition)) {
 487                                 Logger::notice('duplicated item with the same guid found.', $condition);
 488                                 return true;
 489                         }
 490                 } elseif ($item['network'] == Protocol::OSTATUS) {
 491                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 492                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 493                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 494                         if (Post::exists($condition)) {
 495                                 Logger::notice('duplicated item with the same body found.', $item);
 496                                 return true;
 497                         }
 498                 }
 499
 500                 /*
 501                  * Check for already added items.
 502                  * There is a timing issue here that sometimes creates double postings.
 503                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 504                  */
 505                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 506                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 507                         return true;
 508                 }
 509
 510                 return false;
 511         }
 512
 513         /**
 514          * Check if the item array is valid
 515          *
 516          * @param array $item
 517          * @return boolean item is valid
 518          */
 519         public static function isValid(array $item)
 520         {
 521                 // When there is no content then we don't post it
 522                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 523                         Logger::notice('No body, no title.');
 524                         return false;
 525                 }
 526
 527                 if (!empty($item['uid'])) {
 528                         $owner = User::getOwnerDataById($item['uid'], false);
 529                         if (!$owner) {
 530                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 531                                 return false;
 532                         }
 533
 534                         if ($owner['account_expired'] || $owner['account_removed']) {
 535                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 536                                 return false;
 537                         }
 538                 }
 539
 540                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 541                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 542                         return false;
 543                 }
 544
 545                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 546                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 547                         return false;
 548                 }
 549
 550                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 551                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 552                         return false;
 553                 }
 554
 555                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 556                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 557                         return false;
 558                 }
 559
 560                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 561                         return false;
 562                 }
 563
 564                 if ($item['verb'] == Activity::FOLLOW) {
 565                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 566                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 567                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 568                                 return false;
 569                         }
 570
 571                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 572                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 573                         if (Post::exists($condition)) {
 574                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 575                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 576                                 return false;
 577                         }
 578                 }
 579
 580                 return true;
 581         }
 582
 583         /**
 584          * Check if the item array is too old
 585          *
 586          * @param array $item
 587          * @return boolean item is too old
 588          */
 589         public static function isTooOld(array $item)
 590         {
 591                 // check for create date and expire time
 592                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 593
 594                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 595                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 596                         $expire_interval = $user['expire'];
 597                 }
 598
 599                 if (($expire_interval > 0) && !empty($item['created'])) {
 600                         $expire_date = time() - ($expire_interval * 86400);
 601                         $created_date = strtotime($item['created']);
 602                         if ($created_date < $expire_date) {
 603                                 Logger::notice('Item created before expiration interval.', [
 604                                         'created' => date('c', $created_date),
 605                                         'expired' => date('c', $expire_date),
 606                                         '$item' => $item
 607                                 ]);
 608                                 return true;
 609                         }
 610                 }
 611
 612                 return false;
 613         }
 614
 615         /**
 616          * Return the id of the given item array if it has been stored before
 617          *
 618          * @param array $item
 619          * @return integer item id
 620          */
 621         private static function getDuplicateID(array $item)
 622         {
 623                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 624                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 625                                 $item['uri-id'], $item['uid'],
 626                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 627                         $existing = Post::selectFirst(['id', 'network'], $condition);
 628                         if (DBA::isResult($existing)) {
 629                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 630                                 if ($item['uid'] != 0) {
 631                                         Logger::notice('Item already existed for user', [
 632                                                 'uri-id' => $item['uri-id'],
 633                                                 'uid' => $item['uid'],
 634                                                 'network' => $item['network'],
 635                                                 'existing_id' => $existing["id"],
 636                                                 'existing_network' => $existing["network"]
 637                                         ]);
 638                                 }
 639
 640                                 return $existing["id"];
 641                         }
 642                 }
 643                 return 0;
 644         }
 645
 646         /**
 647          * Fetch top-level parent data for the given item array
 648          *
 649          * @param array $item
 650          * @return array item array with parent data
 651          * @throws \Exception
 652          */
 653         private static function getTopLevelParent(array $item)
 654         {
 655                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 656                         'uri-id', 'parent-uri-id',
 657                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 658                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 659                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 660                 $params = ['order' => ['id' => false]];
 661                 $parent = Post::selectFirst($fields, $condition, $params);
 662
 663                 if (!DBA::isResult($parent) && $item['origin']) {
 664                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 665                         Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 666                         $parent = Post::selectFirst($fields, $condition, $params);
 667                 }
 668
 669                 if (!DBA::isResult($parent)) {
 670                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 671                         return [];
 672                 }
 673
 674                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 675                         return $parent;
 676                 }
 677
 678                 $condition = ['uri-id' => $parent['parent-uri-id'],
 679                         'parent-uri-id' => $parent['parent-uri-id'],
 680                         'uid' => $parent['uid']];
 681                 $params = ['order' => ['id' => false]];
 682                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 683
 684                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 685                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 686                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 687                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 688                 }
 689
 690                 if (!DBA::isResult($toplevel_parent)) {
 691                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 692                         return [];
 693                 }
 694
 695                 return $toplevel_parent;
 696         }
 697
 698         /**
 699          * Get the gravity for the given item array
 700          *
 701          * @param array $item
 702          * @return integer gravity
 703          */
 704         private static function getGravity(array $item)
 705         {
 706                 $activity = DI::activity();
 707
 708                 if (isset($item['gravity'])) {
 709                         return intval($item['gravity']);
 710                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 711                         return GRAVITY_PARENT;
 712                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 713                         return GRAVITY_COMMENT;
 714                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 715                         return GRAVITY_ACTIVITY;
 716                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 717                         return GRAVITY_ACTIVITY;
 718                 }
 719                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 720                 return GRAVITY_UNKNOWN;   // Should not happen
 721         }
 722
 723         public static function insert(array $item, bool $notify = false, bool $post_local = true)
 724         {
 725                 $orig_item = $item;
 726
 727                 $priority = PRIORITY_HIGH;
 728
 729                 // If it is a posting where users should get notifications, then define it as wall posting
 730                 if ($notify) {
 731                         $item['wall'] = 1;
 732                         $item['origin'] = 1;
 733                         $item['network'] = Protocol::DFRN;
 734                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 735                         $item['direction'] = Conversation::PUSH;
 736
 737                         if (in_array($notify, PRIORITIES)) {
 738                                 $priority = $notify;
 739                         }
 740                 } else {
 741                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 742                 }
 743
 744                 $uid = intval($item['uid']);
 745
 746                 $item['guid'] = self::guid($item, $notify);
 747                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 748
 749                 // Store URI data
 750                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 751
 752                 // Backward compatibility: parent-uri used to be the direct parent uri.
 753                 // If it is provided without a thr-parent, it probably is the old behavior.
 754                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 755                 $item['parent-uri'] = $item['thr-parent'];
 756
 757                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 758
 759                 // Store conversation data
 760                 $item = Conversation::insert($item);
 761
 762                 /*
 763                  * Do we already have this item?
 764                  * We have to check several networks since Friendica posts could be repeated
 765                  * via OStatus (maybe Diasporsa as well)
 766                  */
 767                 $duplicate = self::getDuplicateID($item);
 768                 if ($duplicate) {
 769                         return $duplicate;
 770                 }
 771
 772                 // Additional duplicate checks
 773                 /// @todo Check why the first duplication check returns the item number and the second a 0
 774                 if (self::isDuplicate($item)) {
 775                         return 0;
 776                 }
 777
 778                 if (!isset($item['post-type'])) {
 779                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 780                 }
 781
 782                 $item['wall']          = intval($item['wall'] ?? 0);
 783                 $item['extid']         = trim($item['extid'] ?? '');
 784                 $item['author-name']   = trim($item['author-name'] ?? '');
 785                 $item['author-link']   = trim($item['author-link'] ?? '');
 786                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 787                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 788                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 789                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 790                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 791                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 792                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 793                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 794                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 795                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 796                 $item['location']      = trim($item['location'] ?? '');
 797                 $item['coord']         = trim($item['coord'] ?? '');
 798                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 799                 $item['deleted']       = 0;
 800                 $item['verb']          = trim($item['verb'] ?? '');
 801                 $item['object-type']   = trim($item['object-type'] ?? '');
 802                 $item['object']        = trim($item['object'] ?? '');
 803                 $item['target-type']   = trim($item['target-type'] ?? '');
 804                 $item['target']        = trim($item['target'] ?? '');
 805                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 806                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 807                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 808                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 809                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 810                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 811                 $item['body']          = trim($item['body'] ?? '');
 812                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 813                 $item['app']           = trim($item['app'] ?? '');
 814                 $item['origin']        = intval($item['origin'] ?? 0);
 815                 $item['postopts']      = trim($item['postopts'] ?? '');
 816                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 817                 $item['event-id']      = intval($item['event-id'] ?? 0);
 818                 $item['inform']        = trim($item['inform'] ?? '');
 819                 $item['file']          = trim($item['file'] ?? '');
 820
 821                 // Items cannot be stored before they happen ...
 822                 if ($item['created'] > DateTimeFormat::utcNow()) {
 823                         $item['created'] = DateTimeFormat::utcNow();
 824                 }
 825
 826                 // We haven't invented time travel by now.
 827                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 828                         $item['edited'] = DateTimeFormat::utcNow();
 829                 }
 830
 831                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 832
 833                 $item['gravity'] = self::getGravity($item);
 834
 835                 $item['language'] = self::getLanguage($item);
 836
 837                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 838                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 839                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 840
 841                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 842                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 843                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 844
 845                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 846                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 847                         $item['post-reason'] = self::PR_FOLLOWER;
 848                 }
 849
 850                 // Ensure that there is an avatar cache
 851                 Contact::checkAvatarCache($item['author-id']);
 852                 Contact::checkAvatarCache($item['owner-id']);
 853
 854                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 855                 $item["contact-id"] = self::contactId($item);
 856
 857                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 858                         self::isTooOld($item)) {
 859                         Logger::info('Item is too old', ['item' => $item]);
 860                         return 0;
 861                 }
 862
 863                 if (!self::isValid($item)) {
 864                         return 0;
 865                 }
 866
 867                 if ($item['gravity'] !== GRAVITY_PARENT) {
 868                         $toplevel_parent = self::getTopLevelParent($item);
 869                         if (empty($toplevel_parent)) {
 870                                 return 0;
 871                         }
 872
 873                         // If the thread originated from this node, we check the permission against the thread starter
 874                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 875                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 876                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 877                                 return 0;
 878                         }
 879
 880                         $parent_id             = $toplevel_parent['id'];
 881                         $item['parent-uri']    = $toplevel_parent['uri'];
 882                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 883                         $item['deleted']       = $toplevel_parent['deleted'];
 884                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 885                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 886                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 887                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 888                         $parent_origin         = $toplevel_parent['origin'];
 889
 890                         // Don't federate received participation messages
 891                         if ($item['verb'] != Activity::FOLLOW) {
 892                                 $item['wall'] = $toplevel_parent['wall'];
 893                         } else {
 894                                 $item['wall'] = false;
 895                                 // Participations are technical messages, so they are set to "seen" automatically
 896                                 $item['unseen'] = false;
 897                         }
 898
 899                         /*
 900                          * If the parent is private, force privacy for the entire conversation
 901                          * This differs from the above settings as it subtly allows comments from
 902                          * email correspondents to be private even if the overall thread is not.
 903                          */
 904                         if ($toplevel_parent['private']) {
 905                                 $item['private'] = $toplevel_parent['private'];
 906                         }
 907
 908                         /*
 909                          * Edge case. We host a public forum that was originally posted to privately.
 910                          * The original author commented, but as this is a comment, the permissions
 911                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 912                          */
 913                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 914                                 $item['private'] = self::PUBLIC;
 915                         }
 916
 917                         // If its a post that originated here then tag the thread as "mention"
 918                         if ($item['origin'] && $item['uid']) {
 919                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 920                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 921                         }
 922
 923                         // Update the contact relations
 924                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 925                 } else {
 926                         $parent_id = 0;
 927                         $parent_origin = $item['origin'];
 928                 }
 929
 930                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 931                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 932
 933                 // Is this item available in the global items (with uid=0)?
 934                 if ($item["uid"] == 0) {
 935                         $item["global"] = true;
 936
 937                         // Set the global flag on all items if this was a global item entry
 938                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 939                 } else {
 940                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 941                 }
 942
 943                 // ACL settings
 944                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 945                         $item["private"] = self::PRIVATE;
 946                 }
 947
 948                 if ($notify && $post_local) {
 949                         $item['edit'] = false;
 950                         $item['parent'] = $parent_id;
 951
 952                         // Trigger automatic reactions for addons
 953                         if (!isset($item['api_source'])) {
 954                                 $item['api_source'] = true;
 955                         }
 956
 957                         // We have to tell the hooks who we are - this really should be improved
 958                         if (!local_user()) {
 959                                 $_SESSION['authenticated'] = true;
 960                                 $_SESSION['uid'] = $uid;
 961                                 $dummy_session = true;
 962                         } else {
 963                                 $dummy_session = false;
 964                         }
 965
 966                         Hook::callAll('post_local', $item);
 967
 968                         if ($dummy_session) {
 969                                 unset($_SESSION['authenticated']);
 970                                 unset($_SESSION['uid']);
 971                         }
 972                 } elseif (!$notify) {
 973                         Hook::callAll('post_remote', $item);
 974                 }
 975
 976                 if (!empty($item['cancel'])) {
 977                         Logger::notice('post cancelled by addon.');
 978                         return 0;
 979                 }
 980
 981                 if (empty($item['vid']) && !empty($item['verb'])) {
 982                         $item['vid'] = Verb::getID($item['verb']);
 983                 }
 984
 985                 // Creates or assigns the permission set
 986                 $item['psid'] = DI::permissionSet()->selectOrCreate(
 987                         DI::permissionSetFactory()->createFromString(
 988                                 $item['uid'],
 989                                 $item['allow_cid'],
 990                                 $item['allow_gid'],
 991                                 $item['deny_cid'],
 992                                 $item['deny_gid']
 993                 ))->id;
 994
 995                 if (!empty($item['extid'])) {
 996                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 997                 }
 998
 999                 if ($item['verb'] == Activity::ANNOUNCE) {
1000                         self::setOwnerforResharedItem($item);
1001                 }
1002
1003                 if (isset($item['attachments'])) {
1004                         foreach ($item['attachments'] as $attachment) {
1005                                 $attachment['uri-id'] = $item['uri-id'];
1006                                 Post\Media::insert($attachment);
1007                         }
1008                         unset($item['attachments']);
1009                 }
1010
1011                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1012
1013                 // Remove all media attachments from the body and store them in the post-media table
1014                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1015                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1016
1017                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1018                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1019                 }
1020
1021                 // Check for hashtags in the body and repair or add hashtag links
1022                 $item['body'] = self::setHashtags($item['body']);
1023
1024                 if (stristr($item['verb'], Activity::POKE)) {
1025                         $notify_type = Delivery::POKE;
1026                 } else {
1027                         $notify_type = Delivery::POST;
1028                 }
1029
1030                 // Filling item related side tables
1031                 if (!empty($item['attach'])) {
1032                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1033                 }
1034
1035                 if (empty($item['event-id'])) {
1036                         unset($item['event-id']);
1037
1038                         $ev = Event::fromBBCode($item['body']);
1039                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1040                                 Logger::info('Event found.');
1041                                 $ev['cid']       = $item['contact-id'];
1042                                 $ev['uid']       = $item['uid'];
1043                                 $ev['uri']       = $item['uri'];
1044                                 $ev['edited']    = $item['edited'];
1045                                 $ev['private']   = $item['private'];
1046                                 $ev['guid']      = $item['guid'];
1047                                 $ev['plink']     = $item['plink'];
1048                                 $ev['network']   = $item['network'];
1049                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1050                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1051                                 $ev['source']    = $item['source'] ?? '';
1052
1053                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1054                                 if (DBA::isResult($event)) {
1055                                         $ev['id'] = $event['id'];
1056                                 }
1057
1058                                 $event_id = Event::store($ev);
1059                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1060
1061                                 Logger::info('Event was stored', ['id' => $event_id]);
1062                         }
1063                 }
1064
1065                 if (empty($item['causer-id'])) {
1066                         unset($item['causer-id']);
1067                 }
1068
1069                 Post::insert($item['uri-id'], $item);
1070
1071                 if ($item['gravity'] == GRAVITY_PARENT) {
1072                         Post\Thread::insert($item['uri-id'], $item);
1073                 }
1074
1075                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1076                         Post\Content::insert($item['uri-id'], $item);
1077                 }
1078
1079                 // Create Diaspora signature
1080                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1081                         $signed = Diaspora::createCommentSignature($item);
1082                         if (!empty($signed)) {
1083                                 $item['diaspora_signed_text'] = json_encode($signed);
1084                         }
1085                 }
1086
1087                 if (!empty($item['diaspora_signed_text'])) {
1088                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1089                 }
1090
1091                 // Attached file links
1092                 if (!empty($item['file'])) {
1093                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1094                 }
1095
1096                 // Delivery relevant data
1097                 $delivery_data = Post\DeliveryData::extractFields($item);
1098
1099                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1100                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1101                 }
1102
1103                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1104                 if (!Tag::existsForPost($item['uri-id'])) {
1105                         Tag::storeFromBody($item['uri-id'], $item['body']);
1106                 }
1107
1108                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1109                 if (Post::exists($condition)) {
1110                         Logger::notice('Item is already inserted - aborting', $condition);
1111                         return 0;
1112                 }
1113
1114                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1115                 if (!$post_user_id) {
1116                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1117                         return 0;
1118                 }
1119
1120                 if ($item['gravity'] == GRAVITY_PARENT) {
1121                         $item['post-user-id'] = $post_user_id;
1122                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1123                 }
1124
1125                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1126
1127                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1128                 if (!DBA::isResult($posted_item)) {
1129                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1130                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1131                         self::spool($orig_item);
1132                         return 0;
1133                 }
1134
1135                 // update the commented timestamp on the parent
1136                 if (DI::config()->get('system', 'like_no_comment')) {
1137                         // Update when it is a comment
1138                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1139                 } else {
1140                         // Update when it isn't a follow or tag verb
1141                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1142                 }
1143
1144                 if ($update_commented) {
1145                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1146                 } else {
1147                         $fields = ['changed' => DateTimeFormat::utcNow()];
1148                 }
1149
1150                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1151
1152                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1153                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1154                         // Get the user information for the logging
1155                         $user = User::getById($uid);
1156
1157                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1158                         return 0;
1159                 }
1160
1161                 if ($notify) {
1162                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1163                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1164                         }
1165                         Hook::callAll('post_local_end', $posted_item);
1166                 } else {
1167                         Hook::callAll('post_remote_end', $posted_item);
1168                 }
1169
1170                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1171                         self::addShadow($post_user_id);
1172                 } else {
1173                         self::addShadowPost($post_user_id);
1174                 }
1175
1176                 self::updateContact($posted_item);
1177
1178                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1179
1180                 // Distribute items to users who subscribed to their tags
1181                 self::distributeByTags($posted_item);
1182
1183                 // Automatically reshare the item if the "remote_self" option is selected
1184                 self::autoReshare($posted_item);
1185
1186                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1187
1188                 if ($transmit) {
1189                         // Don't relay participation messages
1190                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1191                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1192                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1193                                 $transmit = false;
1194                         }
1195                 }
1196
1197                 if ($transmit) {
1198                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1199                 }
1200
1201                 return $post_user_id;
1202         }
1203
1204         /**
1205          * Change the owner of a parent item if it had been shared by a forum
1206          *
1207          * (public) forum posts in the new format consist of the regular post by the author
1208          * followed by an announce message sent from the forum account.
1209          * Changing the owner helps in grouping forum posts.
1210          *
1211          * @param array $item
1212          * @return void
1213          */
1214         private static function setOwnerforResharedItem(array $item)
1215         {
1216                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1217                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1218                 if (!DBA::isResult($parent)) {
1219                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1220                         return;
1221                 }
1222
1223                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1224                 if (!DBA::isResult($author)) {
1225                         Logger::error('Author not found', ['id' => $item['author-id']]);
1226                         return;
1227                 }
1228
1229                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1230                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1231                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1232                         return;
1233                 }
1234
1235                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1236                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1237                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1238                                 return;
1239                         }
1240
1241                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1242                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1243                                 return;
1244                         }
1245                 }
1246
1247                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1248                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1249         }
1250
1251         /**
1252          * Distribute the given item to users who subscribed to their tags
1253          *
1254          * @param array $item     Processed item
1255          */
1256         private static function distributeByTags(array $item)
1257         {
1258                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1259                         return;
1260                 }
1261
1262                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1263                 foreach ($uids as $uid) {
1264                         if (Contact::isSharing($item['author-id'], $uid)) {
1265                                 $fields = [];
1266                         } else {
1267                                 $fields = ['post-reason' => self::PR_TAG];
1268                         }
1269
1270                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1271                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1272                 }
1273         }
1274
1275         /**
1276          * Distributes public items to the receivers
1277          *
1278          * @param integer $itemid      Item ID that should be added
1279          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1280          * @throws \Exception
1281          */
1282         public static function distribute($itemid, $signed_text = '')
1283         {
1284                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1285                 $parent = Post::selectFirst(['owner-id'], $condition);
1286                 if (!DBA::isResult($parent)) {
1287                         Logger::warning('Item not found', ['condition' => $condition]);
1288                         return;
1289                 }
1290
1291                 // Only distribute public items from native networks
1292                 $condition = ['id' => $itemid, 'uid' => 0,
1293                         'network' => array_merge(Protocol::FEDERATED ,['']),
1294                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1295                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1296                 if (!DBA::isResult($item)) {
1297                         Logger::warning('Item not found', ['condition' => $condition]);
1298                         return;
1299                 }
1300
1301                 $origin = $item['origin'];
1302
1303                 $users = [];
1304
1305                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1306                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1307                 if (!DBA::isResult($owner)) {
1308                         return;
1309                 }
1310
1311                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1312                 $contacts = DBA::select('contact', ['uid'], $condition);
1313                 while ($contact = DBA::fetch($contacts)) {
1314                         if ($contact['uid'] == 0) {
1315                                 continue;
1316                         }
1317
1318                         $users[$contact['uid']] = $contact['uid'];
1319                 }
1320                 DBA::close($contacts);
1321
1322                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1323                 $contacts = DBA::select('contact', ['uid'], $condition);
1324                 while ($contact = DBA::fetch($contacts)) {
1325                         if ($contact['uid'] == 0) {
1326                                 continue;
1327                         }
1328
1329                         $users[$contact['uid']] = $contact['uid'];
1330                 }
1331                 DBA::close($contacts);
1332
1333                 if (!empty($owner['alias'])) {
1334                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1335                         $contacts = DBA::select('contact', ['uid'], $condition);
1336                         while ($contact = DBA::fetch($contacts)) {
1337                                 if ($contact['uid'] == 0) {
1338                                         continue;
1339                                 }
1340
1341                                 $users[$contact['uid']] = $contact['uid'];
1342                         }
1343                         DBA::close($contacts);
1344                 }
1345
1346                 $origin_uid = 0;
1347
1348                 if ($item['uri-id'] != $item['parent-uri-id']) {
1349                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1350                         while ($parent = Post::fetch($parents)) {
1351                                 $users[$parent['uid']] = $parent['uid'];
1352                                 if ($parent['origin'] && !$origin) {
1353                                         $origin_uid = $parent['uid'];
1354                                 }
1355                         }
1356                         DBA::close($parents);
1357                 }
1358
1359                 foreach ($users as $uid) {
1360                         if ($origin_uid == $uid) {
1361                                 $item['diaspora_signed_text'] = $signed_text;
1362                         }
1363                         self::storeForUser($item, $uid);
1364                 }
1365         }
1366
1367         /**
1368          * Store a public item defined by their URI-ID for the given users
1369          *
1370          * @param integer $uri_id     URI-ID of the given item
1371          * @param integer $uid        The user that will receive the item entry
1372          * @param array   $fields     Additional fields to be stored
1373          * @param integer $source_uid User id of the source post
1374          * @return integer stored item id
1375          */
1376         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1377         {
1378                 if ($uid == $source_uid) {
1379                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1380                         return 0;
1381                 }
1382
1383                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1384                 if (!DBA::isResult($item)) {
1385                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1386                         return 0;
1387                 }
1388
1389                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1390                         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']]);
1391                         return 0;
1392                 }
1393
1394                 $item['post-reason'] = self::PR_STORED;
1395
1396                 $item = array_merge($item, $fields);
1397
1398                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1399
1400                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1401                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1402                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1403                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1404                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1405                         return 0;
1406                 }
1407
1408                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1409                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1410                         $causer = $item['causer-id'] ?: $item['author-id'];
1411                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1412                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1413                 }
1414
1415                 $stored = self::storeForUser($item, $uid);
1416                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1417                 return $stored;
1418         }
1419
1420         /**
1421          * Store a public item array for the given users
1422          *
1423          * @param array   $item   The item entry that will be stored
1424          * @param integer $uid    The user that will receive the item entry
1425          * @return integer stored item id
1426          * @throws \Exception
1427          */
1428         private static function storeForUser(array $item, int $uid)
1429         {
1430                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1431                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1432                         return 0;
1433                 }
1434
1435                 unset($item['id']);
1436                 unset($item['mention']);
1437                 unset($item['starred']);
1438                 unset($item['unseen']);
1439                 unset($item['psid']);
1440                 unset($item['pinned']);
1441                 unset($item['ignored']);
1442                 unset($item['pubmail']);
1443                 unset($item['forum_mode']);
1444
1445                 unset($item['event-id']);
1446                 unset($item['hidden']);
1447                 unset($item['notification-type']);
1448
1449                 $item['uid'] = $uid;
1450                 $item['origin'] = 0;
1451                 $item['wall'] = 0;
1452
1453                 if ($item['gravity'] == GRAVITY_PARENT) {
1454                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1455                 } else {
1456                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1457                 }
1458
1459                 if (!empty($contact['id'])) {
1460                         $item['contact-id'] = $contact['id'];
1461                 } else {
1462                         // Shouldn't happen at all
1463                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1464                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1465                         if (!DBA::isResult($self)) {
1466                                 // Shouldn't happen even less
1467                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1468                                 return 0;
1469                         }
1470                         $item['contact-id'] = $self['id'];
1471                 }
1472
1473                 $notify = false;
1474                 if ($item['gravity'] == GRAVITY_PARENT) {
1475                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1476                         if (DBA::isResult($contact)) {
1477                                 $notify = self::isRemoteSelf($contact, $item);
1478                         }
1479                 }
1480
1481                 $distributed = self::insert($item, $notify);
1482
1483                 if (!$distributed) {
1484                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1485                 } else {
1486                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1487                 }
1488                 return $distributed;
1489         }
1490
1491         /**
1492          * Add a shadow entry for a given item id that is a thread starter
1493          *
1494          * We store every public item entry additionally with the user id "0".
1495          * This is used for the community page and for the search.
1496          * It is planned that in the future we will store public item entries only once.
1497          *
1498          * @param integer $itemid Item ID that should be added
1499          * @throws \Exception
1500          */
1501         private static function addShadow($itemid)
1502         {
1503                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1504                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1505                 $item = Post::selectFirst($fields, $condition);
1506
1507                 if (!DBA::isResult($item)) {
1508                         return;
1509                 }
1510
1511                 // is it already a copy?
1512                 if (($itemid == 0) || ($item['uid'] == 0)) {
1513                         return;
1514                 }
1515
1516                 // Is it a visible public post?
1517                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1518                         return;
1519                 }
1520
1521                 // is it an entry from a connector? Only add an entry for natively connected networks
1522                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1523                         return;
1524                 }
1525
1526                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1527                         return;
1528                 }
1529
1530                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1531
1532                 if (DBA::isResult($item)) {
1533                         // Preparing public shadow (removing user specific data)
1534                         $item['uid'] = 0;
1535                         unset($item['id']);
1536                         unset($item['parent']);
1537                         unset($item['wall']);
1538                         unset($item['mention']);
1539                         unset($item['origin']);
1540                         unset($item['starred']);
1541                         unset($item['postopts']);
1542                         unset($item['inform']);
1543                         unset($item['post-reason']);
1544                         if ($item['uri-id'] == $item['parent-uri-id']) {
1545                                 $item['contact-id'] = $item['owner-id'];
1546                         } else {
1547                                 $item['contact-id'] = $item['author-id'];
1548                         }
1549
1550                         $public_shadow = self::insert($item);
1551
1552                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1553                 }
1554         }
1555
1556         /**
1557          * Add a shadow entry for a given item id that is a comment
1558          *
1559          * This function does the same like the function above - but for comments
1560          *
1561          * @param integer $itemid Item ID that should be added
1562          * @throws \Exception
1563          */
1564         private static function addShadowPost($itemid)
1565         {
1566                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1567                 if (!DBA::isResult($item)) {
1568                         return;
1569                 }
1570
1571                 // Is it a toplevel post?
1572                 if ($item['gravity'] == GRAVITY_PARENT) {
1573                         self::addShadow($itemid);
1574                         return;
1575                 }
1576
1577                 // Is this a shadow entry?
1578                 if ($item['uid'] == 0) {
1579                         return;
1580                 }
1581
1582                 // Is there a shadow parent?
1583                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1584                         return;
1585                 }
1586
1587                 // Is there already a shadow entry?
1588                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1589                         return;
1590                 }
1591
1592                 // Save "origin" and "parent" state
1593                 $origin = $item['origin'];
1594                 $parent = $item['parent'];
1595
1596                 // Preparing public shadow (removing user specific data)
1597                 $item['uid'] = 0;
1598                 unset($item['id']);
1599                 unset($item['parent']);
1600                 unset($item['wall']);
1601                 unset($item['mention']);
1602                 unset($item['origin']);
1603                 unset($item['starred']);
1604                 unset($item['postopts']);
1605                 unset($item['inform']);
1606                 unset($item['post-reason']);
1607                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1608
1609                 $public_shadow = self::insert($item);
1610
1611                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1612
1613                 // If this was a comment to a Diaspora post we don't get our comment back.
1614                 // This means that we have to distribute the comment by ourselves.
1615                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1616                         self::distribute($public_shadow);
1617                 }
1618         }
1619
1620         /**
1621          * Adds a language specification in a "language" element of given $arr.
1622          * Expects "body" element to exist in $arr.
1623          *
1624          * @param array $item
1625          * @return string detected language
1626          * @throws \Text_LanguageDetect_Exception
1627          */
1628         private static function getLanguage(array $item)
1629         {
1630                 if (!empty($item['language'])) {
1631                         return $item['language'];
1632                 }
1633
1634                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1635                         return '';
1636                 }
1637
1638                 // Convert attachments to links
1639                 $naked_body = BBCode::removeAttachment($item['body']);
1640                 if (empty($naked_body)) {
1641                         return '';
1642                 }
1643
1644                 // Remove links and pictures
1645                 $naked_body = BBCode::removeLinks($naked_body);
1646
1647                 // Convert the title and the body to plain text
1648                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1649
1650                 // Remove possibly remaining links
1651                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1652
1653                 if (empty($naked_body)) {
1654                         return '';
1655                 }
1656
1657                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1658                 // See https://github.com/friendica/friendica/issues/10511
1659                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1660                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1661                 $availableLanguages['fa'] = 'fa';
1662
1663                 $ld = new Language($availableLanguages);
1664                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1665                 if (is_array($languages)) {
1666                         return json_encode($languages);
1667                 }
1668
1669                 return '';
1670         }
1671
1672         public static function getLanguageMessage(array $item)
1673         {
1674                 $iso639 = new \Matriphe\ISO639\ISO639;
1675
1676                 $used_languages = '';
1677                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1678                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1679                 }
1680                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1681                 return $used_languages;
1682         }
1683
1684         /**
1685          * Creates an unique guid out of a given uri
1686          *
1687          * @param string $uri uri of an item entry
1688          * @param string $host hostname for the GUID prefix
1689          * @return string unique guid
1690          */
1691         public static function guidFromUri($uri, $host)
1692         {
1693                 // Our regular guid routine is using this kind of prefix as well
1694                 // We have to avoid that different routines could accidentally create the same value
1695                 $parsed = parse_url($uri);
1696
1697                 // We use a hash of the hostname as prefix for the guid
1698                 $guid_prefix = hash("crc32", $host);
1699
1700                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1701                 unset($parsed["scheme"]);
1702
1703                 // Glue it together to be able to make a hash from it
1704                 $host_id = implode("/", $parsed);
1705
1706                 // We could use any hash algorithm since it isn't a security issue
1707                 $host_hash = hash("ripemd128", $host_id);
1708
1709                 return $guid_prefix.$host_hash;
1710         }
1711
1712         /**
1713          * generate an unique URI
1714          *
1715          * @param integer $uid  User id
1716          * @param string  $guid An existing GUID (Otherwise it will be generated)
1717          *
1718          * @return string
1719          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1720          */
1721         public static function newURI($uid, $guid = "")
1722         {
1723                 if ($guid == "") {
1724                         $guid = System::createUUID();
1725                 }
1726
1727                 return DI::baseUrl()->get() . '/objects/' . $guid;
1728         }
1729
1730         /**
1731          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1732          *
1733          * This can be used to filter for inactive contacts.
1734          * Only do this for public postings to avoid privacy problems, since poco data is public.
1735          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1736          *
1737          * @param array $arr Contains the just posted item record
1738          * @throws \Exception
1739          */
1740         private static function updateContact($arr)
1741         {
1742                 // Unarchive the author
1743                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1744                 if (DBA::isResult($contact)) {
1745                         Contact::unmarkForArchival($contact);
1746                 }
1747
1748                 // Unarchive the contact if it's not our own contact
1749                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1750                 if (DBA::isResult($contact)) {
1751                         Contact::unmarkForArchival($contact);
1752                 }
1753
1754                 /// @todo On private posts we could obfuscate the date
1755                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1756
1757                 // Is it a forum? Then we don't care about the rules from above
1758                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1759                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1760                                 $update = true;
1761                         }
1762                 }
1763
1764                 if ($update) {
1765                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1766                         // So we have to ensure to only update the last item when it had been our own post,
1767                         // or it had been done by a "regular" contact.
1768                         if (!empty($arr['wall'])) {
1769                                 $condition = ['id' => $arr['contact-id']];
1770                         } else {
1771                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1772                         }
1773                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1774                 }
1775                 // Now do the same for the system wide contacts with uid=0
1776                 if ($arr['private'] != self::PRIVATE) {
1777                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1778                                 ['id' => $arr['owner-id']]);
1779
1780                         if ($arr['owner-id'] != $arr['author-id']) {
1781                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1782                                         ['id' => $arr['author-id']]);
1783                         }
1784                 }
1785         }
1786
1787         public static function setHashtags($body)
1788         {
1789                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1790                         $tags = BBCode::getTags($body);
1791
1792                         // No hashtags?
1793                         if (!count($tags)) {
1794                                 return $body;
1795                         }
1796
1797                         // This sorting is important when there are hashtags that are part of other hashtags
1798                         // Otherwise there could be problems with hashtags like #test and #test2
1799                         // Because of this we are sorting from the longest to the shortest tag.
1800                         usort($tags, function ($a, $b) {
1801                                 return strlen($b) <=> strlen($a);
1802                         });
1803
1804                         $URLSearchString = "^\[\]";
1805
1806                         // All hashtags should point to the home server if "local_tags" is activated
1807                         if (DI::config()->get('system', 'local_tags')) {
1808                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1809                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1810                         }
1811
1812                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1813                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1814                                 function ($match) {
1815                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1816                                 }, $body);
1817
1818                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1819                                 function ($match) {
1820                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1821                                 }, $body);
1822
1823                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1824                                 function ($match) {
1825                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1826                                 }, $body);
1827
1828                         // Repair recursive urls
1829                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1830                                 "&num;$2", $body);
1831
1832                         foreach ($tags as $tag) {
1833                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1834                                         continue;
1835                                 }
1836
1837                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1838                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1839
1840                                 $body = str_replace($tag, $newtag, $body);
1841                         }
1842
1843                         // Convert back the masked hashtags
1844                         $body = str_replace("&num;", "#", $body);
1845
1846                         return $body;
1847                 });
1848
1849                 return $body;
1850         }
1851
1852         /**
1853          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1854          *
1855          * @param int $uid
1856          * @param int $item_id
1857          * @return boolean true if item was deleted, else false
1858          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1859          * @throws \ImagickException
1860          */
1861         private static function tagDeliver($uid, $item_id)
1862         {
1863                 $mention = false;
1864
1865                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1866                 if (!DBA::isResult($user)) {
1867                         return false;
1868                 }
1869
1870                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1871                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1872
1873                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1874                 if (!DBA::isResult($item)) {
1875                         return false;
1876                 }
1877
1878                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1879
1880                 /*
1881                  * Diaspora uses their own hardwired link URL in @-tags
1882                  * instead of the one we supply with webfinger
1883                  */
1884                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1885
1886                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1887                 if ($cnt) {
1888                         foreach ($matches as $mtch) {
1889                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1890                                         $mention = true;
1891                                         Logger::notice('mention found', ['mention' => $mtch[2]]);
1892                                 }
1893                         }
1894                 }
1895
1896                 if (!$mention) {
1897                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1898                         foreach ($tags as $tag) {
1899                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1900                                         $mention = true;
1901                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1902                                 }
1903                         }
1904                 }
1905
1906                 if (!$mention) {
1907                         if (($community_page || $prvgroup) &&
1908                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1909                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item['id'], 'guid'=> $item['guid']]);
1910                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1911                                 return true;
1912                         }
1913                         return false;
1914                 }
1915
1916                 $arr = ['item' => $item, 'user' => $user];
1917
1918                 Hook::callAll('tagged', $arr);
1919
1920                 if (!$community_page && !$prvgroup) {
1921                         return false;
1922                 }
1923
1924                 /*
1925                  * tgroup delivery - setup a second delivery chain
1926                  * prevent delivery looping - only proceed
1927                  * if the message originated elsewhere and is a top-level post
1928                  */
1929                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1930                         return false;
1931                 }
1932
1933                 self::performActivity($item['id'], 'announce', $uid);
1934
1935                 /**
1936                  * All the following lines are only needed for private forums and compatibility to older systems without AP support.
1937                  * A possible way would be that the followers list of a forum would always be readable by all followers.
1938                  * So this would mean that the comment distribution could be done exactly for the intended audience.
1939                  * Or possibly we could store the receivers that had been in the "announce" message above and use this.
1940                  */
1941
1942                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1943                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1944                 if (!DBA::isResult($self)) {
1945                         return false;
1946                 }
1947
1948                 $owner_id = Contact::getIdForURL($self['url']);
1949
1950                 // also reset all the privacy bits to the forum default permissions
1951                 if ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) {
1952                         $private = self::PRIVATE;
1953                 } elseif (DI::pConfig()->get($user['uid'], 'system', 'unlisted')) {
1954                         $private = self::UNLISTED;
1955                 } else {
1956                         $private = self::PUBLIC;
1957                 }
1958
1959                 $permissionSet = DI::permissionSet()->selectOrCreate(
1960                         DI::permissionSetFactory()->createFromString(
1961                                 $user['uid'],
1962                                 $user['allow_cid'],
1963                                 $user['allow_gid'],
1964                                 $user['deny_cid'],
1965                                 $user['deny_gid']
1966                         ));
1967
1968                 $forum_mode = ($prvgroup ? 2 : 1);
1969
1970                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1971                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $permissionSet->id];
1972                 self::update($fields, ['id' => $item['id']]);
1973
1974                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1975
1976                 return false;
1977         }
1978
1979         /**
1980          * Automatically reshare the item if the "remote_self" option is selected
1981          *
1982          * @param array $item
1983          * @return void
1984          */
1985         private static function autoReshare(array $item)
1986         {
1987                 if ($item['gravity'] != GRAVITY_PARENT) {
1988                         return;
1989                 }
1990
1991                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1992                         return;
1993                 }
1994
1995                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1996                         return;
1997                 }
1998
1999                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2000
2001                 self::performActivity($item['id'], 'announce', $item['uid']);
2002         }
2003
2004         public static function isRemoteSelf($contact, &$datarray)
2005         {
2006                 if (!$contact['remote_self']) {
2007                         return false;
2008                 }
2009
2010                 // Prevent the forwarding of posts that are forwarded
2011                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2012                         Logger::info('Already forwarded');
2013                         return false;
2014                 }
2015
2016                 // Prevent to forward already forwarded posts
2017                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2018                         Logger::info('Already forwarded (second test)');
2019                         return false;
2020                 }
2021
2022                 // Only forward posts
2023                 if ($datarray["verb"] != Activity::POST) {
2024                         Logger::info('No post');
2025                         return false;
2026                 }
2027
2028                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2029                         Logger::info('Not public');
2030                         return false;
2031                 }
2032
2033                 $datarray2 = $datarray;
2034                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2035                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2036                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2037                                         ['uid' => $contact['uid'], 'self' => true]);
2038                         if (DBA::isResult($self)) {
2039                                 $datarray['contact-id'] = $self["id"];
2040
2041                                 $datarray['owner-name'] = $self["name"];
2042                                 $datarray['owner-link'] = $self["url"];
2043                                 $datarray['owner-avatar'] = $self["thumb"];
2044
2045                                 $datarray['author-name']   = $datarray['owner-name'];
2046                                 $datarray['author-link']   = $datarray['owner-link'];
2047                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2048
2049                                 unset($datarray['edited']);
2050
2051                                 unset($datarray['network']);
2052                                 unset($datarray['owner-id']);
2053                                 unset($datarray['author-id']);
2054                         }
2055
2056                         if ($contact['network'] != Protocol::FEED) {
2057                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2058                                 $datarray["guid"] = System::createUUID();
2059                                 unset($datarray["plink"]);
2060                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2061                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2062                                 $datarray["extid"] = Protocol::DFRN;
2063                                 $urlpart = parse_url($datarray2['author-link']);
2064                                 $datarray["app"] = $urlpart["host"];
2065                                 if (!empty($old_uri_id)) {
2066                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2067                                 }
2068
2069                                 unset($datarray["parent-uri"]);
2070                                 unset($datarray["thr-parent"]);
2071                         } else {
2072                                 $datarray['private'] = self::PUBLIC;
2073                         }
2074                 }
2075
2076                 if ($contact['network'] != Protocol::FEED) {
2077                         // Store the original post
2078                         $result = self::insert($datarray2);
2079                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2080                 } else {
2081                         $datarray["app"] = "Feed";
2082                         $result = true;
2083                 }
2084
2085                 return (bool)$result;
2086         }
2087
2088         /**
2089          *
2090          * @param string $s
2091          * @param int    $uid
2092          * @param array  $item
2093          * @param int    $cid
2094          * @return string
2095          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2096          * @throws \ImagickException
2097          */
2098         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2099         {
2100                 if (DI::config()->get('system', 'disable_embedded')) {
2101                         return $s;
2102                 }
2103
2104                 Logger::info('check for photos');
2105                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2106
2107                 $orig_body = $s;
2108                 $new_body = '';
2109
2110                 $img_start = strpos($orig_body, '[img');
2111                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2112                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2113
2114                 while (($img_st_close !== false) && ($img_len !== false)) {
2115                         $img_st_close++; // make it point to AFTER the closing bracket
2116                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2117
2118                         Logger::info('found photo', ['image' => $image]);
2119
2120                         if (stristr($image, $site . '/photo/')) {
2121                                 // Only embed locally hosted photos
2122                                 $replace = false;
2123                                 $i = basename($image);
2124                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2125                                 $x = strpos($i, '-');
2126
2127                                 if ($x) {
2128                                         $res = substr($i, $x + 1);
2129                                         $i = substr($i, 0, $x);
2130                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2131                                         if (DBA::isResult($photo)) {
2132                                                 /*
2133                                                  * Check to see if we should replace this photo link with an embedded image
2134                                                  * 1. No need to do so if the photo is public
2135                                                  * 2. If there's a contact-id provided, see if they're in the access list
2136                                                  *    for the photo. If so, embed it.
2137                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2138                                                  *    permissions, regardless of order but first check to see if they're an exact
2139                                                  *    match to save some processing overhead.
2140                                                  */
2141                                                 if (self::hasPermissions($photo)) {
2142                                                         if ($cid) {
2143                                                                 $recips = self::enumeratePermissions($photo);
2144                                                                 if (in_array($cid, $recips)) {
2145                                                                         $replace = true;
2146                                                                 }
2147                                                         } elseif ($item) {
2148                                                                 if (self::samePermissions($uid, $item, $photo)) {
2149                                                                         $replace = true;
2150                                                                 }
2151                                                         }
2152                                                 }
2153                                                 if ($replace) {
2154                                                         $photo_img = Photo::getImageForPhoto($photo);
2155                                                         // If a custom width and height were specified, apply before embedding
2156                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2157                                                                 Logger::info('scaling photo');
2158
2159                                                                 $width = intval($match[1]);
2160                                                                 $height = intval($match[2]);
2161
2162                                                                 $photo_img->scaleDown(max($width, $height));
2163                                                         }
2164
2165                                                         $data = $photo_img->asString();
2166                                                         $type = $photo_img->getType();
2167
2168                                                         Logger::info('replacing photo');
2169                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2170                                                         Logger::debug('replaced', ['image' => $image]);
2171                                                 }
2172                                         }
2173                                 }
2174                         }
2175
2176                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2177                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2178                         if ($orig_body === false) {
2179                                 $orig_body = '';
2180                         }
2181
2182                         $img_start = strpos($orig_body, '[img');
2183                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2184                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2185                 }
2186
2187                 $new_body = $new_body . $orig_body;
2188
2189                 return $new_body;
2190         }
2191
2192         private static function hasPermissions($obj)
2193         {
2194                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2195                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2196         }
2197
2198         private static function samePermissions($uid, $obj1, $obj2)
2199         {
2200                 // first part is easy. Check that these are exactly the same.
2201                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2202                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2203                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2204                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2205                         return true;
2206                 }
2207
2208                 // This is harder. Parse all the permissions and compare the resulting set.
2209                 $recipients1 = self::enumeratePermissions($obj1);
2210                 $recipients2 = self::enumeratePermissions($obj2);
2211                 sort($recipients1);
2212                 sort($recipients2);
2213
2214                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2215                 return ($recipients1 == $recipients2);
2216         }
2217
2218         /**
2219          * Returns an array of contact-ids that are allowed to see this object
2220          *
2221          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2222          * @param bool  $check_dead Prunes unavailable contacts from the result
2223          * @return array
2224          * @throws \Exception
2225          */
2226         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2227         {
2228                 $aclFormater = DI::aclFormatter();
2229
2230                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2231                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2232                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2233                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2234                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2235                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2236                 $recipients   = array_diff($recipients, $deny);
2237                 return $recipients;
2238         }
2239
2240         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2241         {
2242                 if (!$uid || ($days < 1)) {
2243                         return;
2244                 }
2245
2246                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2247                         $uid, GRAVITY_PARENT];
2248
2249                 /*
2250                  * $expire_network_only = save your own wall posts
2251                  * and just expire conversations started by others
2252                  */
2253                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2254
2255                 if ($expire_network_only) {
2256                         $condition[0] .= " AND NOT `wall`";
2257                 }
2258
2259                 if ($network != "") {
2260                         $condition[0] .= " AND `network` = ?";
2261                         $condition[] = $network;
2262                 }
2263
2264                 $condition[0] .= " AND `received` < ?";
2265                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2266
2267                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2268
2269                 if (!DBA::isResult($items)) {
2270                         return;
2271                 }
2272
2273                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2274
2275                 // Forcing expiring of items - but not notes and marked items
2276                 if ($force) {
2277                         $expire_items = true;
2278                 }
2279
2280                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2281                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2282                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2283
2284                 $expired = 0;
2285
2286                 $priority = DI::config()->get('system', 'expire-notify-priority');
2287
2288                 while ($item = Post::fetch($items)) {
2289                         // don't expire filed items
2290                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2291                                 continue;
2292                         }
2293
2294                         // Only expire posts, not photos and photo comments
2295
2296                         if (!$expire_photos && !empty($item['resource-id'])) {
2297                                 continue;
2298                         } elseif (!$expire_starred && intval($item['starred'])) {
2299                                 continue;
2300                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2301                                 continue;
2302                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2303                                 continue;
2304                         }
2305
2306                         self::markForDeletionById($item['id'], $priority);
2307
2308                         ++$expired;
2309                 }
2310                 DBA::close($items);
2311                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2312         }
2313
2314         public static function firstPostDate($uid, $wall = false)
2315         {
2316                 $user = User::getById($uid, ['register_date']);
2317                 if (empty($user)) {
2318                         return false;
2319                 }
2320
2321                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2322                         $uid, $wall, $user['register_date']];
2323                 $params = ['order' => ['received' => false]];
2324                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2325                 if (DBA::isResult($thread)) {
2326                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2327                         return $postdate;
2328                 }
2329                 return false;
2330         }
2331
2332         /**
2333          * add/remove activity to an item
2334          *
2335          * Toggle activities as like,dislike,attend of an item
2336          *
2337          * @param int $item_id
2338          * @param string $verb
2339          *            Activity verb. One of
2340          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2341          *            attendno, unattendno, attendmaybe, unattendmaybe,
2342          *            announce, unannouce
2343          * @return bool
2344          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2345          * @throws \ImagickException
2346          * @hook  'post_local_end'
2347          *            array $arr
2348          *            'post_id' => ID of posted item
2349          */
2350         public static function performActivity(int $item_id, string $verb, int $uid)
2351         {
2352                 if (empty($uid)) {
2353                         return false;
2354                 }
2355
2356                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2357
2358                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2359                 if (!DBA::isResult($item)) {
2360                         Logger::notice('like: unknown item', ['id' => $item_id]);
2361                         return false;
2362                 }
2363
2364                 $uri_id = $item['uri-id'];
2365
2366                 if (!in_array($item['uid'], [0, $uid])) {
2367                         return false;
2368                 }
2369
2370                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2371                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2372                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2373                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2374                                 if (!DBA::isResult($item)) {
2375                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2376                                         return false;
2377                                 }
2378                         }
2379                 }
2380
2381                 // Retrieves the local post owner
2382                 $owner = User::getOwnerDataById($uid);
2383                 if (empty($owner)) {
2384                         Logger::info('Empty owner for user', ['uid' => $uid]);
2385                         return false;
2386                 }
2387
2388                 // Retrieve the current logged in user's public contact
2389                 $author_id = Contact::getIdForURL($owner['url']);
2390                 if (empty($author_id)) {
2391                         Logger::info('Empty public contact');
2392                         return false;
2393                 }
2394
2395                 $activity = null;
2396                 switch ($verb) {
2397                         case 'like':
2398                         case 'unlike':
2399                                 $activity = Activity::LIKE;
2400                                 break;
2401                         case 'dislike':
2402                         case 'undislike':
2403                                 $activity = Activity::DISLIKE;
2404                                 break;
2405                         case 'attendyes':
2406                         case 'unattendyes':
2407                                 $activity = Activity::ATTEND;
2408                                 break;
2409                         case 'attendno':
2410                         case 'unattendno':
2411                                 $activity = Activity::ATTENDNO;
2412                                 break;
2413                         case 'attendmaybe':
2414                         case 'unattendmaybe':
2415                                 $activity = Activity::ATTENDMAYBE;
2416                                 break;
2417                         case 'follow':
2418                         case 'unfollow':
2419                                 $activity = Activity::FOLLOW;
2420                                 break;
2421                         case 'announce':
2422                         case 'unannounce':
2423                                 $activity = Activity::ANNOUNCE;
2424                                 break;
2425                         default:
2426                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2427                                 return false;
2428                 }
2429
2430                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2431
2432                 // Enable activity toggling instead of on/off
2433                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2434
2435                 // Look for an existing verb row
2436                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2437                 if ($event_verb_flag) {
2438                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2439
2440                         // Translate to the index based activity index
2441                         $vids = [];
2442                         foreach ($verbs as $verb) {
2443                                 $vids[] = Verb::getID($verb);
2444                         }
2445                 } else {
2446                         $vids = Verb::getID($activity);
2447                 }
2448
2449                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2450                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2451                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2452
2453                 if (DBA::isResult($like_item)) {
2454                         /**
2455                          * Truth table for existing activities
2456                          *
2457                          * |          Inputs            ||      Outputs      |
2458                          * |----------------------------||-------------------|
2459                          * |  Mode  | Event | Same verb || Delete? | Return? |
2460                          * |--------|-------|-----------||---------|---------|
2461                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2462                          * | create |  Yes  |    No     ||   Yes   |   No    |
2463                          * | create |  No   |    Yes    ||   No    |   Yes   |
2464                          * | create |  No   |    No     ||        N/A†       |
2465                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2466                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2467                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2468                          * | delete |  No   |    No     ||        N/A†       |
2469                          * |--------|-------|-----------||---------|---------|
2470                          * |   A    |   B   |     C     || A xor C | !B or C |
2471                          *
2472                          * † Can't happen: It's impossible to find an existing non-event activity without
2473                          *                 the same verb because we are only looking for this single verb.
2474                          *
2475                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2476                          */
2477                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2478                                 self::markForDeletionById($like_item['id']);
2479                         }
2480
2481                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2482                                 return true;
2483                         }
2484                 }
2485
2486                 // No need to go further if we aren't creating anything
2487                 if ($mode == 'delete') {
2488                         return true;
2489                 }
2490
2491                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2492
2493                 $new_item = [
2494                         'guid'          => System::createUUID(),
2495                         'uri'           => self::newURI($item['uid']),
2496                         'uid'           => $item['uid'],
2497                         'contact-id'    => $owner['id'],
2498                         'wall'          => $item['wall'],
2499                         'origin'        => 1,
2500                         'network'       => Protocol::DFRN,
2501                         'protocol'      => Conversation::PARCEL_DIRECT,
2502                         'direction'     => Conversation::PUSH,
2503                         'gravity'       => GRAVITY_ACTIVITY,
2504                         'parent'        => $item['id'],
2505                         'thr-parent'    => $item['uri'],
2506                         'owner-id'      => $author_id,
2507                         'author-id'     => $author_id,
2508                         'body'          => $activity,
2509                         'verb'          => $activity,
2510                         'object-type'   => $objtype,
2511                         'allow_cid'     => $item['allow_cid'],
2512                         'allow_gid'     => $item['allow_gid'],
2513                         'deny_cid'      => $item['deny_cid'],
2514                         'deny_gid'      => $item['deny_gid'],
2515                         'visible'       => 1,
2516                         'unseen'        => 1,
2517                 ];
2518
2519                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2520                 if (!empty($signed)) {
2521                         $new_item['diaspora_signed_text'] = json_encode($signed);
2522                 }
2523
2524                 $new_item_id = self::insert($new_item);
2525
2526                 // If the parent item isn't visible then set it to visible
2527                 if (!$item['visible']) {
2528                         self::update(['visible' => true], ['id' => $item['id']]);
2529                 }
2530
2531                 $new_item['id'] = $new_item_id;
2532
2533                 Hook::callAll('post_local_end', $new_item);
2534
2535                 return true;
2536         }
2537
2538         /**
2539          * Fetch the SQL condition for the given user id
2540          *
2541          * @param integer $owner_id User ID for which the permissions should be fetched
2542          * @return array condition
2543          */
2544         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2545         {
2546                 $local_user = local_user();
2547                 $remote_user = Session::getRemoteContactID($owner_id);
2548
2549                 // default permissions - anonymous user
2550                 $condition = ["`private` != ?", self::PRIVATE];
2551
2552                 if ($local_user && ($local_user == $owner_id)) {
2553                         // Profile owner - everything is visible
2554                         $condition = [];
2555                 } elseif ($remote_user) {
2556                          // Authenticated visitor - fetch the matching permissionsets
2557                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2558                         if (!empty($set)) {
2559                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2560                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2561                                         self::PRIVATE, self::PRIVATE];
2562                                 $condition = array_merge($condition, $permissionSets->column('id'));
2563                         }
2564                 }
2565
2566                 return $condition;
2567         }
2568
2569         /**
2570          * Get a permission SQL string for the given user
2571          *
2572          * @param int $owner_id
2573          * @param string $table
2574          * @return string
2575          */
2576         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2577         {
2578                 $local_user = local_user();
2579                 $remote_user = Session::getRemoteContactID($owner_id);
2580
2581                 if (!empty($table)) {
2582                         $table = DBA::quoteIdentifier($table) . '.';
2583                 }
2584
2585                 /*
2586                  * Construct permissions
2587                  *
2588                  * default permissions - anonymous user
2589                  */
2590                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2591
2592                 // Profile owner - everything is visible
2593                 if ($local_user && ($local_user == $owner_id)) {
2594                         $sql = '';
2595                 } elseif ($remote_user) {
2596                         /*
2597                          * Authenticated visitor. Unless pre-verified,
2598                          * check that the contact belongs to this $owner_id
2599                          * and load the groups the visitor belongs to.
2600                          * If pre-verified, the caller is expected to have already
2601                          * done this and passed the groups into this function.
2602                          */
2603                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2604
2605                         if (!empty($set)) {
2606                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2607                         } else {
2608                                 $sql_set = '';
2609                         }
2610
2611                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2612                 }
2613
2614                 return $sql;
2615         }
2616
2617         /**
2618          * get translated item type
2619          *
2620          * @param array                $item
2621          * @param \Friendica\Core\L10n $l10n
2622          * @return string
2623          */
2624         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2625         {
2626                 if (!empty($item['event-id'])) {
2627                         return $l10n->t('event');
2628                 } elseif (!empty($item['resource-id'])) {
2629                         return $l10n->t('photo');
2630                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2631                         return $l10n->t('activity');
2632                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2633                         return $l10n->t('comment');
2634                 }
2635
2636                 return $l10n->t('post');
2637         }
2638
2639         /**
2640          * Sets the "rendered-html" field of the provided item
2641          *
2642          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2643          *
2644          * @param array $item
2645          *
2646          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2647          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2648          */
2649         public static function putInCache(&$item)
2650         {
2651                 // Save original body to prevent addons to modify it
2652                 $body = $item['body'];
2653
2654                 $rendered_hash = $item['rendered-hash'] ?? '';
2655                 $rendered_html = $item['rendered-html'] ?? '';
2656
2657                 if ($rendered_hash == ''
2658                         || $rendered_html == ''
2659                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2660                         || DI::config()->get('system', 'ignore_cache')
2661                 ) {
2662                         self::addRedirToImageTags($item);
2663
2664                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2665                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2666
2667                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2668                         Hook::callAll('put_item_in_cache', $hook_data);
2669                         $item['rendered-html'] = $hook_data['rendered-html'];
2670                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2671                         unset($hook_data);
2672
2673                         // Update if the generated values differ from the existing ones
2674                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2675                                 self::update(
2676                                         [
2677                                                 'rendered-html' => $item['rendered-html'],
2678                                                 'rendered-hash' => $item['rendered-hash']
2679                                         ],
2680                                         ['id' => $item['id']]
2681                                 );
2682                         }
2683                 }
2684
2685                 $item['body'] = $body;
2686         }
2687
2688         /**
2689          * Find any non-embedded images in private items and add redir links to them
2690          *
2691          * @param array &$item The field array of an item row
2692          */
2693         private static function addRedirToImageTags(array &$item)
2694         {
2695                 $app = DI::app();
2696
2697                 $matches = [];
2698                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2699                 if ($cnt) {
2700                         foreach ($matches as $mtch) {
2701                                 if (strpos($mtch[1], '/redir') !== false) {
2702                                         continue;
2703                                 }
2704
2705                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->getContactId()) && ($item['network'] == Protocol::DFRN)) {
2706                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2707                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2708                                 }
2709                         }
2710                 }
2711         }
2712
2713         /**
2714          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2715          * If attach is true, also add icons for item attachments.
2716          *
2717          * @param array   $item
2718          * @param boolean $attach
2719          * @param boolean $is_preview
2720          * @return string item body html
2721          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2722          * @throws \ImagickException
2723          * @hook  prepare_body_init item array before any work
2724          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2725          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2726          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2727          */
2728         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2729         {
2730                 $a = DI::app();
2731                 Hook::callAll('prepare_body_init', $item);
2732
2733                 // In order to provide theme developers more possibilities, event items
2734                 // are treated differently.
2735                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2736                         $ev = Event::getItemHTML($item);
2737                         return $ev;
2738                 }
2739
2740                 $tags = Tag::populateFromItem($item);
2741
2742                 $item['tags'] = $tags['tags'];
2743                 $item['hashtags'] = $tags['hashtags'];
2744                 $item['mentions'] = $tags['mentions'];
2745
2746                 $body = $item['body'] ?? '';
2747                 $shared = BBCode::fetchShareAttributes($body);
2748                 if (!empty($shared['guid'])) {
2749                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2750                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2751                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2752                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2753                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2754                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2755                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2756                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2757                 } else {
2758                         $shared_uri_id = 0;
2759                         $shared_links = [];
2760                 }
2761                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2762                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2763
2764                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2765                 self::putInCache($item);
2766                 $item['body'] = $body;
2767                 $s = $item["rendered-html"];
2768
2769                 // Compile eventual content filter reasons
2770                 $filter_reasons = [];
2771                 if (!$is_preview && public_contact() != $item['author-id']) {
2772                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2773                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2774                         }
2775
2776                         $item['attachments'] = $attachments;
2777
2778                         $hook_data = [
2779                                 'item' => $item,
2780                                 'filter_reasons' => $filter_reasons
2781                         ];
2782                         Hook::callAll('prepare_body_content_filter', $hook_data);
2783                         $filter_reasons = $hook_data['filter_reasons'];
2784                         unset($hook_data);
2785                 }
2786
2787                 $hook_data = [
2788                         'item' => $item,
2789                         'html' => $s,
2790                         'preview' => $is_preview,
2791                         'filter_reasons' => $filter_reasons
2792                 ];
2793                 Hook::callAll('prepare_body', $hook_data);
2794                 $s = $hook_data['html'];
2795                 unset($hook_data);
2796
2797                 if (!$attach) {
2798                         // Replace the blockquotes with quotes that are used in mails.
2799                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2800                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2801                         return $s;
2802                 }
2803
2804                 if (!empty($shared_attachments)) {
2805                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2806                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2807                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2808                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2809                 }
2810
2811                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2812                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2813                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2814
2815                 // Map.
2816                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2817                         $x = Map::byCoordinates(trim($item['coord']));
2818                         if ($x) {
2819                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2820                         }
2821                 }
2822
2823                 // Replace friendica image url size with theme preference.
2824                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2825                         $ps = $a->getThemeInfoValue('item_image_size');
2826                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2827                 }
2828
2829                 $s = HTML::applyContentFilter($s, $filter_reasons);
2830
2831                 $hook_data = ['item' => $item, 'html' => $s];
2832                 Hook::callAll('prepare_body_final', $hook_data);
2833
2834                 return $hook_data['html'];
2835         }
2836
2837         /**
2838          * Check if the body contains a link
2839          *
2840          * @param string $body
2841          * @param string $url
2842          * @param int    $type
2843          * @return bool
2844          */
2845         public static function containsLink(string $body, string $url, int $type = 0)
2846         {
2847                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2848                 $urlparts = parse_url($url);
2849                 unset($urlparts['query']);
2850                 unset($urlparts['fragment']);
2851                 $url = Network::unparseURL($urlparts);
2852
2853                 // Remove media links to only search in embedded content
2854                 // @todo Check images for image link, audio for audio links, ...
2855                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2856                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2857                 }
2858
2859                 if (strpos($body, $url)) {
2860                         return true;
2861                 }
2862                 foreach ([0, 1, 2] as $size) {
2863                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2864                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2865                                 return true;
2866                         }
2867                 }
2868                 return false;
2869         }
2870
2871         /**
2872          * Replace visual attachments in the body
2873          *
2874          * @param array $attachments
2875          * @param string $body
2876          * @return string modified body
2877          */
2878         private static function replaceVisualAttachments(array $attachments, string $body)
2879         {
2880                 DI::profiler()->startRecording('rendering');
2881
2882                 foreach ($attachments['visual'] as $attachment) {
2883                         if (!empty($attachment['preview'])) {
2884                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2885                         } elseif ($attachment['filetype'] == 'image') {
2886                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2887                         }
2888                 }
2889                 DI::profiler()->stopRecording();
2890                 return $body;
2891         }
2892
2893         /**
2894          * Add visual attachments to the content
2895          *
2896          * @param array $attachments
2897          * @param array $item
2898          * @param string $content
2899          * @return string modified content
2900          */
2901         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2902         {
2903                 DI::profiler()->startRecording('rendering');
2904                 $leading = '';
2905                 $trailing = '';
2906
2907                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2908                 foreach ($attachments['visual'] as $attachment) {
2909                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2910                                 continue;
2911                         }
2912
2913                         if (!empty($attachment['preview'])) {
2914                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2915                         } else {
2916                                 $preview_url = '';
2917                         }
2918
2919                         if (($attachment['filetype'] == 'video')) {
2920                                 /// @todo Move the template to /content as well
2921                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2922                                         '$video' => [
2923                                                 'id'      => $attachment['id'],
2924                                                 'src'     => $attachment['url'],
2925                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2926                                                 'preview' => $preview_url,
2927                                                 'mime'    => $attachment['mimetype'],
2928                                         ],
2929                                 ]);
2930                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2931                                         $leading .= $media;
2932                                 } else {
2933                                         $trailing .= $media;
2934                                 }
2935                         } elseif ($attachment['filetype'] == 'audio') {
2936                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2937                                         '$audio' => [
2938                                                 'id'     => $attachment['id'],
2939                                                 'src'    => $attachment['url'],
2940                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2941                                                 'mime'   => $attachment['mimetype'],
2942                                         ],
2943                                 ]);
2944                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2945                                         $leading .= $media;
2946                                 } else {
2947                                         $trailing .= $media;
2948                                 }
2949                         } elseif ($attachment['filetype'] == 'image') {
2950                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2951                                         '$image' => [
2952                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2953                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2954                                                 'attachment' => $attachment,
2955                                         ],
2956                                 ]);
2957                                 // On Diaspora posts the attached pictures are leading
2958                                 if ($item['network'] == Protocol::DIASPORA) {
2959                                         $leading .= $media;
2960                                 } else {
2961                                         $trailing .= $media;
2962                                 }
2963                         }
2964                 }
2965
2966                 if ($shared) {
2967                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2968                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2969                 } else {
2970                         if ($leading != '') {
2971                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2972                         }
2973
2974                         if ($trailing != '') {
2975                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2976                         }
2977                 }
2978
2979                 DI::profiler()->stopRecording();
2980                 return $content;
2981         }
2982
2983         /**
2984          * Add link attachment to the content
2985          *
2986          * @param array  $attachments
2987          * @param string $body
2988          * @param string $content
2989          * @param bool   $shared
2990          * @param array  $ignore_links A list of URLs to ignore
2991          * @return string modified content
2992          */
2993         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2994         {
2995                 DI::profiler()->startRecording('rendering');
2996                 // Don't show a preview when there is a visual attachment (audio or video)
2997                 $types = array_column($attachments['visual'], 'type');
2998                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
2999
3000                 if (!empty($attachments['link'])) {
3001                         foreach ($attachments['link'] as $link) {
3002                                 $found = false;
3003                                 foreach ($ignore_links as $ignore_link) {
3004                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3005                                                 $found = true;
3006                                         }
3007                                 }
3008                                 // @todo Judge between the links to use the one with most information
3009                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3010                                         (empty($attachment['name']) && !empty($link['name'])) ||
3011                                         (empty($attachment['description']) && !empty($link['description'])) ||
3012                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3013                                         $attachment = $link;
3014                                 }
3015                         }
3016                 }
3017
3018                 if (!empty($attachment)) {
3019                         $data = [
3020                                 'after' => '',
3021                                 'author_name' => $attachment['author-name'] ?? '',
3022                                 'author_url' =>  $attachment['author-url'] ?? '',
3023                                 'description' => $attachment['description'] ?? '',
3024                                 'image' => '',
3025                                 'preview' => '',
3026                                 'provider_name' => $attachment['publisher-name'] ?? '',
3027                                 'provider_url' => $attachment['publisher-url'] ?? '',
3028                                 'text' => '',
3029                                 'title' => $attachment['name'] ?? '',
3030                                 'type' => 'link',
3031                                 'url' => $attachment['url']];
3032
3033                         if ($preview && !empty($attachment['preview'])) {
3034                                 if ($attachment['preview-width'] >= 500) {
3035                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3036                                 } else {
3037                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3038                                 }
3039                         }
3040
3041                         if (!empty($data['description']) && !empty($content)) {
3042                                 similar_text($data['description'], $content, $percent);
3043                         } else {
3044                                 $percent = 0;
3045                         }
3046
3047                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3048                                 $data['description'] = '';
3049                         }
3050
3051                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3052                                 $data['author_name'] = '';
3053                         }
3054
3055                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3056                                 $data['author_url'] = '';
3057                         }
3058                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3059                         $data = BBCode::getAttachmentData($match[1]);
3060                 }
3061                 DI::profiler()->stopRecording();
3062
3063                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3064                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3065                                 $parts = parse_url($data['url']);
3066                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3067                                         if (empty($data['provider_name'])) {
3068                                                 $data['provider_name'] = $parts['host'];
3069                                         }
3070                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3071                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3072
3073                                                 if (!empty($parts['port'])) {
3074                                                         $data['provider_url'] .= ':' . $parts['port'];
3075                                                 }
3076                                         }
3077                                 }
3078
3079                                 // @todo Use a template
3080                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3081                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3082                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3083                                         '$url'  => $data['url'],
3084                                         '$title' => $data['title'],
3085                                 ]);
3086                         } else {
3087                                 return $content;
3088                         }
3089
3090                         if ($shared) {
3091                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3092                         } else {
3093                                 return $content . $rendered;
3094                         }
3095                 }
3096                 return $content;
3097         }
3098
3099         /**
3100          * Add non visual attachments to the content
3101          *
3102          * @param array $attachments
3103          * @param array $item
3104          * @param string $content
3105          * @return string modified content
3106          */
3107         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3108         {
3109                 DI::profiler()->startRecording('rendering');
3110                 $trailing = '';
3111                 foreach ($attachments['additional'] as $attachment) {
3112                         if (strpos($item['body'], $attachment['url'])) {
3113                                 continue;
3114                         }
3115
3116                         $author = ['uid' => 0, 'id' => $item['author-id'],
3117                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3118                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3119
3120                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3121
3122                         if (!empty($attachment['size'])) {
3123                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3124                         }
3125
3126                         /// @todo Use a template
3127                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3128                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3129                 }
3130
3131                 if ($trailing != '') {
3132                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3133                 }
3134
3135                 DI::profiler()->stopRecording();
3136                 return $content;
3137         }
3138
3139         /**
3140          * get private link for item
3141          *
3142          * @param array $item
3143          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3144          * @throws \Exception
3145          */
3146         public static function getPlink($item)
3147         {
3148                 if (local_user()) {
3149                         $ret = [
3150                                 'href' => "display/" . $item['guid'],
3151                                 'orig' => "display/" . $item['guid'],
3152                                 'title' => DI::l10n()->t('View on separate page'),
3153                                 'orig_title' => DI::l10n()->t('View on separate page'),
3154                         ];
3155
3156                         if (!empty($item['plink'])) {
3157                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3158                                 $ret['title'] = DI::l10n()->t('Link to source');
3159                         }
3160                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3161                         $ret = [
3162                                 'href' => $item['plink'],
3163                                 'orig' => $item['plink'],
3164                                 'title' => DI::l10n()->t('Link to source'),
3165                                 'orig_title' => DI::l10n()->t('Link to source'),
3166                         ];
3167                 } else {
3168                         $ret = [];
3169                 }
3170
3171                 return $ret;
3172         }
3173
3174         /**
3175          * Is the given item array a post that is sent as starting post to a forum?
3176          *
3177          * @param array $item
3178          * @param array $owner
3179          *
3180          * @return boolean "true" when it is a forum post
3181          */
3182         public static function isForumPost(array $item, array $owner = [])
3183         {
3184                 if (empty($owner)) {
3185                         $owner = User::getOwnerDataById($item['uid']);
3186                         if (empty($owner)) {
3187                                 return false;
3188                         }
3189                 }
3190
3191                 if (($item['author-id'] == $item['owner-id']) ||
3192                         ($owner['id'] == $item['contact-id']) ||
3193                         ($item['uri-id'] != $item['parent-uri-id']) ||
3194                         $item['origin']) {
3195                         return false;
3196                 }
3197
3198                 return Contact::isForum($item['contact-id']);
3199         }
3200
3201         /**
3202          * Search item id for given URI or plink
3203          *
3204          * @param string $uri
3205          * @param integer $uid
3206          *
3207          * @return integer item id
3208          */
3209         public static function searchByLink($uri, $uid = 0)
3210         {
3211                 $ssl_uri = str_replace('http://', 'https://', $uri);
3212                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3213
3214                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3215                 if (DBA::isResult($item)) {
3216                         return $item['id'];
3217                 }
3218
3219                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3220                 if (DBA::isResult($item)) {
3221                         return $item['id'];
3222                 }
3223
3224                 return 0;
3225         }
3226
3227         /**
3228          * Return the URI for a link to the post
3229          *
3230          * @param string $uri URI or link to post
3231          *
3232          * @return string URI
3233          */
3234         public static function getURIByLink(string $uri)
3235         {
3236                 $ssl_uri = str_replace('http://', 'https://', $uri);
3237                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3238
3239                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3240                 if (DBA::isResult($item)) {
3241                         return $item['uri'];
3242                 }
3243
3244                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3245                 if (DBA::isResult($item)) {
3246                         return $item['uri'];
3247                 }
3248
3249                 return '';
3250         }
3251
3252         /**
3253          * Fetches item for given URI or plink
3254          *
3255          * @param string $uri
3256          * @param integer $uid
3257          *
3258          * @return integer item id
3259          */
3260         public static function fetchByLink(string $uri, int $uid = 0)
3261         {
3262                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3263                 $item_id = self::searchByLink($uri, $uid);
3264                 if (!empty($item_id)) {
3265                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3266                         return $item_id;
3267                 }
3268
3269                 $hookData = [
3270                         'uri'     => $uri,
3271                         'uid'     => $uid,
3272                         'item_id' => null,
3273                 ];
3274
3275                 Hook::callAll('item_by_link', $hookData);
3276
3277                 if (isset($hookData['item_id'])) {
3278                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3279                 }
3280
3281                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3282                         $item_id = self::searchByLink($fetched_uri, $uid);
3283                 } else {
3284                         $item_id = Diaspora::fetchByURL($uri);
3285                 }
3286
3287                 if (!empty($item_id)) {
3288                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3289                         return $item_id;
3290                 }
3291
3292                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3293                 return 0;
3294         }
3295
3296         /**
3297          * Return share data from an item array (if the item is shared item)
3298          * We are providing the complete Item array, because at some time in the future
3299          * we hopefully will define these values not in the body anymore but in some item fields.
3300          * This function is meant to replace all similar functions in the system.
3301          *
3302          * @param array $item
3303          *
3304          * @return array with share information
3305          */
3306         public static function getShareArray($item)
3307         {
3308                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3309                         return [];
3310                 }
3311
3312                 $attribute_string = $matches[2];
3313                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3314                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3315                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3316                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3317                         }
3318                 }
3319                 return $attributes;
3320         }
3321
3322         /**
3323          * Fetch item information for shared items from the original items and adds it.
3324          *
3325          * @param array $item
3326          *
3327          * @return array item array with data from the original item
3328          */
3329         public static function addShareDataFromOriginal(array $item)
3330         {
3331                 $shared = self::getShareArray($item);
3332                 if (empty($shared)) {
3333                         return $item;
3334                 }
3335
3336                 // Real reshares always have got a GUID.
3337                 if (empty($shared['guid'])) {
3338                         return $item;
3339                 }
3340
3341                 $uid = $item['uid'] ?? 0;
3342
3343                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3344                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3345                 if (!DBA::isResult($shared_item)) {
3346                         if (empty($shared['link'])) {
3347                                 return $item;
3348                         }
3349
3350                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3351                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3352                         if (empty($id)) {
3353                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3354                                 return $item;
3355                         }
3356
3357                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3358                         if (!DBA::isResult($shared_item)) {
3359                                 return $item;
3360                         }
3361                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3362                 } else {
3363                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3364                 }
3365
3366                 if (!empty($shared_item['title'])) {
3367                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3368                         unset($shared_item['title']);
3369                 } else {
3370                         $body = $shared_item['body'];
3371                 }
3372
3373                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3374                 unset($shared_item['body']);
3375
3376                 return array_merge($item, $shared_item);
3377         }
3378
3379         /**
3380          * Check a prospective item array against user-level permissions
3381          *
3382          * @param array $item Expected keys: uri, gravity, and
3383          *                    author-link if is author-id is set,
3384          *                    owner-link if is owner-id is set,
3385          *                    causer-link if is causer-id is set.
3386          * @param int   $user_id Local user ID
3387          * @return bool
3388          * @throws \Exception
3389          */
3390         protected static function isAllowedByUser(array $item, int $user_id)
3391         {
3392                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3393                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3394                         return false;
3395                 }
3396
3397                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3398                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3399                         return false;
3400                 }
3401
3402                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3403                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3404                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3405                         return false;
3406                 }
3407
3408                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3409                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3410                         return false;
3411                 }
3412
3413                 return true;
3414         }
3415
3416         /**
3417          * Improve the data in shared posts
3418          *
3419          * @param array $item
3420          * @return string body
3421          */
3422         public static function improveSharedDataInBody(array $item)
3423         {
3424                 $shared = BBCode::fetchShareAttributes($item['body']);
3425                 if (empty($shared['link'])) {
3426                         return $item['body'];
3427                 }
3428
3429                 $id = self::fetchByLink($shared['link']);
3430                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3431                 if (!$id) {
3432                         return $item['body'];
3433                 }
3434
3435                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3436                 if (!DBA::isResult($shared_item)) {
3437                         return $item['body'];
3438                 }
3439
3440                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3441
3442                 if (!empty($shared_item['title'])) {
3443                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3444                 }
3445
3446                 $shared_content .= $shared_item['body'];
3447
3448                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3449                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3450                 return $item['body'];
3451         }
3452 }