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