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\Protocol\Activity;
  37 use Friendica\Protocol\ActivityPub;
  38 use Friendica\Protocol\Diaspora;
  39 use Friendica\Util\DateTimeFormat;
  40 use Friendica\Util\Map;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\Proxy;
  43 use Friendica\Util\Strings;
  44 use Friendica\Util\Temporal;
  45 use Friendica\Worker\Delivery;
  46 use GuzzleHttp\Psr7\Uri;
  47 use LanguageDetection\Language;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_POLL = 33;
  61         const PT_PERSONAL_NOTE = 128;
  62
  63         // Posting reasons (Why had a post been stored for a user?)
  64         const PR_NONE = 0;
  65         const PR_TAG = 64;
  66         const PR_TO = 65;
  67         const PR_CC = 66;
  68         const PR_BTO = 67;
  69         const PR_BCC = 68;
  70         const PR_FOLLOWER = 69;
  71         const PR_ANNOUNCEMENT = 70;
  72         const PR_COMMENT = 71;
  73         const PR_STORED = 72;
  74         const PR_GLOBAL = 73;
  75         const PR_RELAY = 74;
  76         const PR_FETCHED = 75;
  77         const PR_COMPLETION = 76;
  78         const PR_DIRECT = 77;
  79         const PR_ACTIVITY = 78;
  80         const PR_DISTRIBUTE = 79;
  81         const PR_PUSHED = 80;
  82         const PR_LOCAL = 81;
  83
  84         // system.accept_only_sharer setting values
  85         const COMPLETION_NONE    = 1;
  86         const COMPLETION_COMMENT = 0;
  87         const COMPLETION_LIKE    = 2;
  88
  89         // Field list that is used to display the items
  90         const DISPLAY_FIELDLIST = [
  91                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  92                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  93                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  94                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  95                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  96                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  97                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  98                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
  99                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
 100                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 101                 'writable', 'self', 'cid', 'alias',
 102                 'event-created', 'event-edited', 'event-start', 'event-finish',
 103                 'event-summary', 'event-desc', 'event-location', 'event-type',
 104                 'event-nofinish', 'event-ignore', 'event-id',
 105                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 106                 'has-categories', 'has-media',
 107                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 108         ];
 109
 110         // Field list that is used to deliver items via the protocols
 111         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 112                         'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 113                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 114                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 115                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 116                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 117                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 118                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 119                         'event-created', 'event-edited', 'event-start', 'event-finish',
 120                         'event-summary', 'event-desc', 'event-location', 'event-type',
 121                         'event-nofinish', 'event-ignore', 'event-id'];
 122
 123         // All fields in the item table
 124         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 125                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 126                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 127                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 128                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 129                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 130                         'private', 'pubmail', 'visible', 'starred',
 131                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 132                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 133                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 134                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 135                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 136
 137         // List of all verbs that don't need additional content data.
 138         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 139         const ACTIVITIES = [
 140                 Activity::LIKE, Activity::DISLIKE,
 141                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 142                 Activity::FOLLOW,
 143                 Activity::ANNOUNCE];
 144
 145         const PUBLIC = 0;
 146         const PRIVATE = 1;
 147         const UNLISTED = 2;
 148
 149         /**
 150          * Update existing item entries
 151          *
 152          * @param array $fields    The fields that are to be changed
 153          * @param array $condition The condition for finding the item entries
 154          *
 155          * In the future we may have to change permissions as well.
 156          * Then we had to add the user id as third parameter.
 157          *
 158          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 159          *
 160          * @return integer|boolean number of affected rows - or "false" if there was an error
 161          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 162          */
 163         public static function update(array $fields, array $condition)
 164         {
 165                 if (empty($condition) || empty($fields)) {
 166                         return false;
 167                 }
 168
 169                 if (isset($fields['extid'])) {
 170                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 171                 }
 172
 173                 if (!empty($fields['verb'])) {
 174                         $fields['vid'] = Verb::getID($fields['verb']);
 175                 }
 176
 177                 if (!empty($fields['edited'])) {
 178                         $previous = Post::selectFirst(['edited'], $condition);
 179                 }
 180
 181                 $rows = Post::update($fields, $condition);
 182                 if (is_bool($rows)) {
 183                         return $rows;
 184                 }
 185
 186                 // We only need to call the line by line update for specific fields
 187                 if (empty($fields['body']) && empty($fields['file']) &&
 188                         empty($fields['attach']) && empty($fields['edited'])) {
 189                         return $rows;
 190                 }
 191
 192                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 193
 194                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 195
 196                 $notify_items = [];
 197
 198                 while ($item = DBA::fetch($items)) {
 199                         if (!empty($fields['body'])) {
 200                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 201
 202                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 203
 204                                 // Remove all media attachments from the body and store them in the post-media table
 205                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 206                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 207                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 208
 209                                 if ($item['author-network'] != Protocol::DFRN) {
 210                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 211                                 }
 212
 213                                 Post\Content::update($item['uri-id'], $content_fields);
 214                         }
 215
 216                         if (!empty($fields['file'])) {
 217                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 218                         }
 219
 220                         if (!empty($fields['attach'])) {
 221                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 222                         }
 223
 224                         // We only need to notfiy others when it is an original entry from us.
 225                         // Only call the notifier when the item had been edited and records had been changed.
 226                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 227                                 $notify_items[] = $item['id'];
 228                         }
 229                 }
 230
 231                 DBA::close($items);
 232
 233                 foreach ($notify_items as $notify_item) {
 234                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 235                         Worker::add(PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 236                 }
 237
 238                 return $rows;
 239         }
 240
 241         /**
 242          * Delete an item and notify others about it - if it was ours
 243          *
 244          * @param array   $condition The condition for finding the item entries
 245          * @param integer $priority  Priority for the notification
 246          * @return void
 247          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 248          */
 249         public static function markForDeletion(array $condition, int $priority = PRIORITY_HIGH)
 250         {
 251                 $items = Post::select(['id'], $condition);
 252                 while ($item = Post::fetch($items)) {
 253                         self::markForDeletionById($item['id'], $priority);
 254                 }
 255                 DBA::close($items);
 256         }
 257
 258         /**
 259          * Delete an item for an user and notify others about it - if it was ours
 260          *
 261          * @param array   $condition The condition for finding the item entries
 262          * @param integer $uid       User who wants to delete this item
 263          * @return void
 264          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 265          */
 266         public static function deleteForUser(array $condition, int $uid)
 267         {
 268                 if ($uid == 0) {
 269                         return;
 270                 }
 271
 272                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 273                 while ($item = Post::fetch($items)) {
 274                         if (in_array($item['uid'], [$uid, 0])) {
 275                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 276                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 277                         }
 278
 279                         if ($item['uid'] == $uid) {
 280                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 281                         } elseif ($item['uid'] != 0) {
 282                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 283                         }
 284                 }
 285                 DBA::close($items);
 286         }
 287
 288         /**
 289          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 290          *
 291          * @param integer $item_id
 292          * @param integer $priority Priority for the notification
 293          * @return boolean success
 294          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 295          */
 296         public static function markForDeletionById(int $item_id, int $priority = PRIORITY_HIGH): bool
 297         {
 298                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 299                 // locate item to be deleted
 300                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 301                         'deleted', 'resource-id', 'event-id',
 302                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 303                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 304                 if (!DBA::isResult($item)) {
 305                         Logger::info('Item not found.', ['id' => $item_id]);
 306                         return false;
 307                 }
 308
 309                 if ($item['deleted']) {
 310                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 311                         return false;
 312                 }
 313
 314                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 315                 if (!DBA::isResult($parent)) {
 316                         $parent = ['origin' => false];
 317                 }
 318
 319                 // clean up categories and tags so they don't end up as orphans
 320                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 321
 322                 /*
 323                  * If item is a link to a photo resource, nuke all the associated photos
 324                  * (visitors will not have photo resources)
 325                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 326                  * generate a resource-id and therefore aren't intimately linked to the item.
 327                  */
 328                 /// @TODO: this should first check if photo is used elsewhere
 329                 if (strlen($item['resource-id'])) {
 330                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 331                 }
 332
 333                 // If item is a link to an event, delete the event.
 334                 if (intval($item['event-id'])) {
 335                         Event::delete($item['event-id']);
 336                 }
 337
 338                 // If item has attachments, drop them
 339                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 340                 foreach($attachments as $attachment) {
 341                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 342                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 343                         }
 344                 }
 345
 346                 // Set the item to "deleted"
 347                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 348                 Post::update($item_fields, ['id' => $item['id']]);
 349
 350                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 351
 352                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 353                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 354                 }
 355
 356                 Post\DeliveryData::delete($item['uri-id']);
 357
 358                 // If it's the parent of a comment thread, kill all the kids
 359                 if ($item['gravity'] == GRAVITY_PARENT) {
 360                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 361                 }
 362
 363                 // Is it our comment and/or our thread?
 364                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 365                         // When we delete the original post we will delete all existing copies on the server as well
 366                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 367
 368                         // send the notification upstream/downstream
 369                         if ($priority) {
 370                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 371                         }
 372                 } elseif ($item['uid'] != 0) {
 373                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 374                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 375                 }
 376
 377                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 378
 379                 return true;
 380         }
 381
 382         /**
 383          * Get guid from given item record
 384          *
 385          * @param array $item Item record
 386          * @param bool Whether to notify (?)
 387          * @return string Guid
 388          */
 389         public static function guid(array $item, bool $notify): string
 390         {
 391                 if (!empty($item['guid'])) {
 392                         return trim($item['guid']);
 393                 }
 394
 395                 if ($notify) {
 396                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 397                         // We add the hash of our own host because our host is the original creator of the post.
 398                         $prefix_host = DI::baseUrl()->getHostname();
 399                 } else {
 400                         $prefix_host = '';
 401
 402                         // We are only storing the post so we create a GUID from the original hostname.
 403                         if (!empty($item['author-link'])) {
 404                                 $parsed = parse_url($item['author-link']);
 405                                 if (!empty($parsed['host'])) {
 406                                         $prefix_host = $parsed['host'];
 407                                 }
 408                         }
 409
 410                         if (empty($prefix_host) && !empty($item['plink'])) {
 411                                 $parsed = parse_url($item['plink']);
 412                                 if (!empty($parsed['host'])) {
 413                                         $prefix_host = $parsed['host'];
 414                                 }
 415                         }
 416
 417                         if (empty($prefix_host) && !empty($item['uri'])) {
 418                                 $parsed = parse_url($item['uri']);
 419                                 if (!empty($parsed['host'])) {
 420                                         $prefix_host = $parsed['host'];
 421                                 }
 422                         }
 423
 424                         // Is it in the format data@host.tld? - Used for mail contacts
 425                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 426                                 $mailparts = explode('@', $item['author-link']);
 427                                 $prefix_host = array_pop($mailparts);
 428                         }
 429                 }
 430
 431                 if (!empty($item['plink'])) {
 432                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 433                 } elseif (!empty($item['uri'])) {
 434                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 435                 } else {
 436                         $guid = System::createUUID(hash('crc32', $prefix_host));
 437                 }
 438
 439                 return $guid;
 440         }
 441
 442         /**
 443          * Returns contact id from given item record
 444          *
 445          * @param array $item Item record
 446          * @return int Contact id
 447          */
 448         private static function contactId(array $item): int
 449         {
 450                 if ($item['uid'] == 0) {
 451                         return $item['author-id'];
 452                 }
 453
 454                 if ($item['origin']) {
 455                         $owner = User::getOwnerDataById($item['uid']);
 456                         return $owner['id'];
 457                 }
 458
 459                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 460                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 461                         if (!empty($cdata['user'])) {
 462                                 return $cdata['user'];
 463                         }
 464                 }
 465
 466                 if ($item['gravity'] == GRAVITY_PARENT) {
 467                         if (Contact::isSharingByURL($item['owner-link'], $item['uid'], true)) {
 468                                 $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 469                         } else {
 470                                 $contact_id = Contact::getIdForURL($item['owner-link']);
 471                         }
 472                         if (!empty($contact_id)) {
 473                                 return $contact_id;
 474                         }
 475                 }
 476
 477                 if (Contact::isSharingByURL($item['author-link'], $item['uid'], true)) {
 478                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 479                 } else {
 480                         $contact_id = Contact::getIdForURL($item['author-link']);
 481                 }
 482
 483                 if (!empty($contact_id)) {
 484                         return $contact_id;
 485                 }
 486
 487                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 488                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 489                 return $self['id'];
 490         }
 491
 492         /**
 493          * Write an item array into a spool file to be inserted later.
 494          * This command is called whenever there are issues storing an item.
 495          *
 496          * @param array $item The item fields that are to be inserted
 497          * @throws \Exception
 498          */
 499         private static function spool(array $item)
 500         {
 501                 // Now we store the data in the spool directory
 502                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 503                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 504
 505                 $spoolpath = System::getSpoolPath();
 506                 if ($spoolpath != '') {
 507                         $spool = $spoolpath . '/' . $file;
 508
 509                         file_put_contents($spool, json_encode($item));
 510                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 511                 }
 512         }
 513
 514         /**
 515          * Check if the item array is a duplicate
 516          *
 517          * @param array $item Item record
 518          * @return boolean is it a duplicate?
 519          */
 520         private static function isDuplicate(array $item): bool
 521         {
 522                 // Checking if there is already an item with the same guid
 523                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 524                 if (Post::exists($condition)) {
 525                         Logger::notice('Found already existing item', $condition);
 526                         return true;
 527                 }
 528
 529                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 530                         'network' => [$item['network'], Protocol::DFRN]];
 531                 if (Post::exists($condition)) {
 532                         Logger::notice('duplicated item with the same uri found.', $condition);
 533                         return true;
 534                 }
 535
 536                 // On Friendica and Diaspora the GUID is unique
 537                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 538                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 539                         if (Post::exists($condition)) {
 540                                 Logger::notice('duplicated item with the same guid found.', $condition);
 541                                 return true;
 542                         }
 543                 } elseif ($item['network'] == Protocol::OSTATUS) {
 544                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 545                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 546                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 547                         if (Post::exists($condition)) {
 548                                 Logger::notice('duplicated item with the same body found.', $item);
 549                                 return true;
 550                         }
 551                 }
 552
 553                 /*
 554                  * Check for already added items.
 555                  * There is a timing issue here that sometimes creates double postings.
 556                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 557                  */
 558                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 559                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 560                         return true;
 561                 }
 562
 563                 return false;
 564         }
 565
 566         /**
 567          * Check if the item array is valid
 568          *
 569          * @param array $item Item record
 570          * @return boolean item is valid
 571          */
 572         public static function isValid(array $item): bool
 573         {
 574                 // When there is no content then we don't post it
 575                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 576                         Logger::notice('No body, no title.');
 577                         return false;
 578                 }
 579
 580                 if (!empty($item['uid'])) {
 581                         $owner = User::getOwnerDataById($item['uid'], false);
 582                         if (!$owner) {
 583                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 584                                 return false;
 585                         }
 586
 587                         if ($owner['account_expired'] || $owner['account_removed']) {
 588                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 589                                 return false;
 590                         }
 591                 }
 592
 593                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 594                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 595                         return false;
 596                 }
 597
 598                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 599                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 600                         return false;
 601                 }
 602
 603                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 604                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 605                         return false;
 606                 }
 607
 608                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 609                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 610                         return false;
 611                 }
 612
 613                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 614                         return false;
 615                 }
 616
 617                 if ($item['verb'] == Activity::FOLLOW) {
 618                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 619                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 620                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 621                                 return false;
 622                         }
 623
 624                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 625                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 626                         if (Post::exists($condition)) {
 627                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 628                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 629                                 return false;
 630                         }
 631                 }
 632
 633                 return true;
 634         }
 635
 636         /**
 637          * Check if the item array is too old
 638          *
 639          * @param array $item Item record
 640          * @return boolean item is too old
 641          */
 642         public static function isTooOld(array $item): bool
 643         {
 644                 // check for create date and expire time
 645                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 646
 647                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 648                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 649                         $expire_interval = $user['expire'];
 650                 }
 651
 652                 if (($expire_interval > 0) && !empty($item['created'])) {
 653                         $expire_date = time() - ($expire_interval * 86400);
 654                         $created_date = strtotime($item['created']);
 655                         if ($created_date < $expire_date) {
 656                                 Logger::notice('Item created before expiration interval.', [
 657                                         'created' => date('c', $created_date),
 658                                         'expired' => date('c', $expire_date),
 659                                         '$item' => $item
 660                                 ]);
 661                                 return true;
 662                         }
 663                 }
 664
 665                 return false;
 666         }
 667
 668         /**
 669          * Return the id of the given item array if it has been stored before
 670          *
 671          * @param array $item Item record
 672          * @return integer Item id or zero on error
 673          */
 674         private static function getDuplicateID(array $item): int
 675         {
 676                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 677                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 678                                 $item['uri-id'],
 679                                 $item['uid'],
 680                                 Protocol::ACTIVITYPUB,
 681                                 Protocol::DIASPORA,
 682                                 Protocol::DFRN,
 683                                 Protocol::OSTATUS
 684                         ];
 685                         $existing = Post::selectFirst(['id', 'network'], $condition);
 686                         if (DBA::isResult($existing)) {
 687                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 688                                 if ($item['uid'] != 0) {
 689                                         Logger::notice('Item already existed for user', [
 690                                                 'uri-id' => $item['uri-id'],
 691                                                 'uid' => $item['uid'],
 692                                                 'network' => $item['network'],
 693                                                 'existing_id' => $existing['id'],
 694                                                 'existing_network' => $existing['network']
 695                                         ]);
 696                                 }
 697
 698                                 return $existing['id'];
 699                         }
 700                 }
 701                 return 0;
 702         }
 703
 704         /**
 705          * Fetch the uri-id of the parent for the given uri-id
 706          *
 707          * @param integer $uriid
 708          * @return integer
 709          */
 710         public static function getParent(int $uriid): int
 711         {
 712                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 713                 if (empty($thread_parent)) {
 714                         return 0;
 715                 }
 716
 717                 if ($thread_parent['gravity'] == GRAVITY_PARENT) {
 718                         return $uriid;
 719                 }
 720
 721                 return self::getParent($thread_parent['thr-parent-id']);
 722         }
 723
 724         /**
 725          * Fetch top-level parent data for the given item array
 726          *
 727          * @param array $item
 728          * @return array item array with parent data
 729          * @throws \Exception
 730          */
 731         private static function getTopLevelParent(array $item): array
 732         {
 733                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 734                         'uri-id', 'parent-uri-id',
 735                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 736                         'wall', 'private', 'origin', 'author-id'];
 737                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 738                 $params = ['order' => ['id' => false]];
 739                 $parent = Post::selectFirst($fields, $condition, $params);
 740
 741                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 742                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 743                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 744                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 745                         }
 746                         if ($stored) {
 747                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 748                                 $parent = Post::selectFirst($fields, $condition, $params);
 749                         }
 750                 }
 751
 752                 if (!DBA::isResult($parent)) {
 753                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 754                         return [];
 755                 }
 756
 757                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 758                         return $parent;
 759                 }
 760
 761                 $condition = ['uri-id' => $parent['parent-uri-id'],
 762                         'parent-uri-id' => $parent['parent-uri-id'],
 763                         'uid' => $parent['uid']];
 764                 $params = ['order' => ['id' => false]];
 765                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 766
 767                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 768                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 769                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 770                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 771                 }
 772
 773                 if (!DBA::isResult($toplevel_parent)) {
 774                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 775                         return [];
 776                 }
 777
 778                 return $toplevel_parent;
 779         }
 780
 781         /**
 782          * Get the gravity for the given item array
 783          *
 784          * @param array $item
 785          * @return integer gravity
 786          */
 787         private static function getGravity(array $item): int
 788         {
 789                 $activity = DI::activity();
 790
 791                 if (isset($item['gravity'])) {
 792                         return intval($item['gravity']);
 793                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 794                         return GRAVITY_PARENT;
 795                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 796                         return GRAVITY_COMMENT;
 797                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 798                         return GRAVITY_ACTIVITY;
 799                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 800                         return GRAVITY_ACTIVITY;
 801                 }
 802
 803                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 804                 return GRAVITY_UNKNOWN;   // Should not happen
 805         }
 806
 807         /**
 808          * Inserts item record
 809          *
 810          * @param array $item Item array to be inserted
 811          * @param int   $notify Notification (type?)
 812          * @param bool  $post_local (???)
 813          * @return int Zero means error, otherwise primary key (id) is being returned
 814          */
 815         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 816         {
 817                 $orig_item = $item;
 818
 819                 $priority = PRIORITY_HIGH;
 820
 821                 // If it is a posting where users should get notifications, then define it as wall posting
 822                 if ($notify) {
 823                         $item['wall'] = 1;
 824                         $item['origin'] = 1;
 825                         $item['network'] = Protocol::DFRN;
 826                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 827                         $item['direction'] = Conversation::PUSH;
 828
 829                         if (is_int($notify) && in_array($notify, PRIORITIES)) {
 830                                 $priority = $notify;
 831                         }
 832                 } else {
 833                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 834                 }
 835
 836                 $uid = intval($item['uid']);
 837
 838                 $item['guid'] = self::guid($item, $notify);
 839                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 840
 841                 // Store URI data
 842                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 843
 844                 // Backward compatibility: parent-uri used to be the direct parent uri.
 845                 // If it is provided without a thr-parent, it probably is the old behavior.
 846                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 847                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 848                         $item['parent-uri'] = $item['thr-parent'];
 849                 }
 850
 851                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 852                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 853
 854                 // Store conversation data
 855                 $source = $item['source'] ?? '';
 856                 unset($item['conversation-uri']);
 857                 unset($item['conversation-href']);
 858                 unset($item['source']);
 859
 860                 /*
 861                  * Do we already have this item?
 862                  * We have to check several networks since Friendica posts could be repeated
 863                  * via OStatus (maybe Diasporsa as well)
 864                  */
 865                 $duplicate = self::getDuplicateID($item);
 866                 if ($duplicate) {
 867                         return $duplicate;
 868                 }
 869
 870                 // Additional duplicate checks
 871                 /// @todo Check why the first duplication check returns the item number and the second a 0
 872                 if (self::isDuplicate($item)) {
 873                         return 0;
 874                 }
 875
 876                 if (!isset($item['post-type'])) {
 877                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 878                 }
 879
 880                 $item['wall']          = intval($item['wall'] ?? 0);
 881                 $item['extid']         = trim($item['extid'] ?? '');
 882                 $item['author-name']   = trim($item['author-name'] ?? '');
 883                 $item['author-link']   = trim($item['author-link'] ?? '');
 884                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 885                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 886                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 887                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 888                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 889                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 890                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 891                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 892                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 893                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 894                 $item['location']      = trim($item['location'] ?? '');
 895                 $item['coord']         = trim($item['coord'] ?? '');
 896                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 897                 $item['deleted']       = 0;
 898                 $item['verb']          = trim($item['verb'] ?? '');
 899                 $item['object-type']   = trim($item['object-type'] ?? '');
 900                 $item['object']        = trim($item['object'] ?? '');
 901                 $item['target-type']   = trim($item['target-type'] ?? '');
 902                 $item['target']        = trim($item['target'] ?? '');
 903                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 904                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 905                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 906                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 907                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 908                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 909                 $item['body']          = trim($item['body'] ?? '');
 910                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 911                 $item['app']           = trim($item['app'] ?? '');
 912                 $item['origin']        = intval($item['origin'] ?? 0);
 913                 $item['postopts']      = trim($item['postopts'] ?? '');
 914                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 915                 $item['event-id']      = intval($item['event-id'] ?? 0);
 916                 $item['inform']        = trim($item['inform'] ?? '');
 917                 $item['file']          = trim($item['file'] ?? '');
 918
 919                 // Communities aren't working with the Diaspora protoccol
 920                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 921                         $user = User::getById($uid, ['account-type']);
 922                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 923                                 Logger::info('Community posts are not supported via Diaspora');
 924                                 return 0;
 925                         }
 926                 }
 927
 928                 // Items cannot be stored before they happen ...
 929                 if ($item['created'] > DateTimeFormat::utcNow()) {
 930                         $item['created'] = DateTimeFormat::utcNow();
 931                 }
 932
 933                 // We haven't invented time travel by now.
 934                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 935                         $item['edited'] = DateTimeFormat::utcNow();
 936                 }
 937
 938                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 939
 940                 $item['gravity'] = self::getGravity($item);
 941
 942                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 943                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 944                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 945
 946                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 947                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 948                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 949
 950                 $item['post-reason'] = self::getPostReason($item);
 951
 952                 // Ensure that there is an avatar cache
 953                 Contact::checkAvatarCache($item['author-id']);
 954                 Contact::checkAvatarCache($item['owner-id']);
 955
 956                 $item['contact-id'] = self::contactId($item);
 957
 958                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 959                         empty($item['origin']) && self::isTooOld($item)) {
 960                         Logger::info('Item is too old', ['item' => $item]);
 961                         return 0;
 962                 }
 963
 964                 if (!self::isValid($item)) {
 965                         return 0;
 966                 }
 967
 968                 if ($item['gravity'] !== GRAVITY_PARENT) {
 969                         $toplevel_parent = self::getTopLevelParent($item);
 970                         if (empty($toplevel_parent)) {
 971                                 return 0;
 972                         }
 973
 974                         // If the thread originated from this node, we check the permission against the thread starter
 975                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 976                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 977                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 978                                 return 0;
 979                         }
 980
 981                         $parent_id             = $toplevel_parent['id'];
 982                         $item['parent-uri']    = $toplevel_parent['uri'];
 983                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 984                         $item['deleted']       = $toplevel_parent['deleted'];
 985
 986                         // Reshares have to keep their permissions to allow forums to work
 987                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 988                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 989                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 990                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 991                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 992                         }
 993
 994                         $parent_origin         = $toplevel_parent['origin'];
 995
 996                         // Don't federate received participation messages
 997                         if ($item['verb'] != Activity::FOLLOW) {
 998                                 $item['wall'] = $toplevel_parent['wall'];
 999                         } else {
1000                                 $item['wall'] = false;
1001                                 // Participations are technical messages, so they are set to "seen" automatically
1002                                 $item['unseen'] = false;
1003                         }
1004
1005                         /*
1006                          * If the parent is private, force privacy for the entire conversation
1007                          * This differs from the above settings as it subtly allows comments from
1008                          * email correspondents to be private even if the overall thread is not.
1009                          */
1010                         if ($toplevel_parent['private']) {
1011                                 $item['private'] = $toplevel_parent['private'];
1012                         }
1013
1014                         // If its a post that originated here then tag the thread as "mention"
1015                         if ($item['origin'] && $item['uid']) {
1016                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1017                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1018                         }
1019
1020                         // Update the contact relations
1021                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1022                 } else {
1023                         $parent_id = 0;
1024                         $parent_origin = $item['origin'];
1025
1026                         if ($item['wall'] && empty($item['conversation'])) {
1027                                 $item['conversation'] = $item['parent-uri'] . '#context';
1028                         }
1029                 }
1030
1031                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1032                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1033
1034                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1035                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1036                 }
1037
1038                 // Is this item available in the global items (with uid=0)?
1039                 if ($item['uid'] == 0) {
1040                         $item['global'] = true;
1041
1042                         // Set the global flag on all items if this was a global item entry
1043                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1044                 } else {
1045                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1046                 }
1047
1048                 // ACL settings
1049                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1050                         $item['private'] = self::PRIVATE;
1051                 }
1052
1053                 if ($notify && $post_local) {
1054                         $item['edit'] = false;
1055                         $item['parent'] = $parent_id;
1056
1057                         // Trigger automatic reactions for addons
1058                         if (!isset($item['api_source'])) {
1059                                 $item['api_source'] = true;
1060                         }
1061
1062                         // We have to tell the hooks who we are - this really should be improved
1063                         if (!local_user()) {
1064                                 $_SESSION['authenticated'] = true;
1065                                 $_SESSION['uid'] = $uid;
1066                                 $dummy_session = true;
1067                         } else {
1068                                 $dummy_session = false;
1069                         }
1070
1071                         Hook::callAll('post_local', $item);
1072
1073                         if ($dummy_session) {
1074                                 unset($_SESSION['authenticated']);
1075                                 unset($_SESSION['uid']);
1076                         }
1077                 } elseif (!$notify) {
1078                         Hook::callAll('post_remote', $item);
1079                 }
1080
1081                 if (!empty($item['cancel'])) {
1082                         Logger::notice('post cancelled by addon.');
1083                         return 0;
1084                 }
1085
1086                 if (empty($item['vid']) && !empty($item['verb'])) {
1087                         $item['vid'] = Verb::getID($item['verb']);
1088                 }
1089
1090                 // Creates or assigns the permission set
1091                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1092                         DI::permissionSetFactory()->createFromString(
1093                                 $item['uid'],
1094                                 $item['allow_cid'],
1095                                 $item['allow_gid'],
1096                                 $item['deny_cid'],
1097                                 $item['deny_gid']
1098                 ))->id;
1099
1100                 if (!empty($item['extid'])) {
1101                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1102                 }
1103
1104                 if ($item['verb'] == Activity::ANNOUNCE) {
1105                         self::setOwnerforResharedItem($item);
1106                 }
1107
1108                 if (isset($item['attachments'])) {
1109                         foreach ($item['attachments'] as $attachment) {
1110                                 $attachment['uri-id'] = $item['uri-id'];
1111                                 Post\Media::insert($attachment);
1112                         }
1113                         unset($item['attachments']);
1114                 }
1115
1116                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1117
1118                 // Remove all media attachments from the body and store them in the post-media table
1119                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1120                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1121
1122                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1123                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1124                 }
1125
1126                 // Check for hashtags in the body and repair or add hashtag links
1127                 $item['body'] = self::setHashtags($item['body']);
1128
1129                 $item['language'] = self::getLanguage($item);
1130
1131                 $notify_type = Delivery::POST;
1132
1133                 // Filling item related side tables
1134                 if (!empty($item['attach'])) {
1135                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1136                 }
1137
1138                 if (empty($item['event-id'])) {
1139                         unset($item['event-id']);
1140
1141                         $ev = Event::fromBBCode($item['body']);
1142                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1143                                 Logger::info('Event found.');
1144                                 $ev['cid']       = $item['contact-id'];
1145                                 $ev['uid']       = $item['uid'];
1146                                 $ev['uri']       = $item['uri'];
1147                                 $ev['edited']    = $item['edited'];
1148                                 $ev['private']   = $item['private'];
1149                                 $ev['guid']      = $item['guid'];
1150                                 $ev['plink']     = $item['plink'];
1151                                 $ev['network']   = $item['network'];
1152                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1153                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1154                                 $ev['source']    = $item['source'] ?? '';
1155
1156                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1157                                 if (DBA::isResult($event)) {
1158                                         $ev['id'] = $event['id'];
1159                                 }
1160
1161                                 $event_id = Event::store($ev);
1162                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1163
1164                                 Logger::info('Event was stored', ['id' => $event_id]);
1165                         }
1166                 }
1167
1168                 if (empty($item['causer-id'])) {
1169                         unset($item['causer-id']);
1170                 }
1171
1172                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1173                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1174                         if (!empty($content_warning) && empty($item['content-warning'])) {
1175                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1176                         }
1177                 }
1178
1179                 Post::insert($item['uri-id'], $item);
1180
1181                 if ($item['gravity'] == GRAVITY_PARENT) {
1182                         Post\Thread::insert($item['uri-id'], $item);
1183                 }
1184
1185                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1186                         Post\Content::insert($item['uri-id'], $item);
1187                 }
1188
1189                 // Create Diaspora signature
1190                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1191                         $signed = Diaspora::createCommentSignature($item);
1192                         if (!empty($signed)) {
1193                                 $item['diaspora_signed_text'] = json_encode($signed);
1194                         }
1195                 }
1196
1197                 if (!empty($item['diaspora_signed_text'])) {
1198                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1199                 }
1200
1201                 // Attached file links
1202                 if (!empty($item['file'])) {
1203                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1204                 }
1205
1206                 // Delivery relevant data
1207                 $delivery_data = Post\DeliveryData::extractFields($item);
1208
1209                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1210                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1211                 }
1212
1213                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1214                 if (!Tag::existsForPost($item['uri-id'])) {
1215                         Tag::storeFromBody($item['uri-id'], $item['body']);
1216                 }
1217
1218                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1219                 if (Post::exists($condition)) {
1220                         Logger::notice('Item is already inserted - aborting', $condition);
1221                         return 0;
1222                 }
1223
1224                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1225                 if (!$post_user_id) {
1226                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1227                         return 0;
1228                 }
1229
1230                 if ($item['gravity'] == GRAVITY_PARENT) {
1231                         $item['post-user-id'] = $post_user_id;
1232                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1233                 }
1234
1235                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1236
1237                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1238                 if (!DBA::isResult($posted_item)) {
1239                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1240                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1241                         self::spool($orig_item);
1242                         return 0;
1243                 }
1244
1245                 // update the commented timestamp on the parent
1246                 if (DI::config()->get('system', 'like_no_comment')) {
1247                         // Update when it is a comment
1248                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1249                 } else {
1250                         // Update when it isn't a follow or tag verb
1251                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1252                 }
1253
1254                 if ($update_commented) {
1255                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1256                 } else {
1257                         $fields = ['changed' => DateTimeFormat::utcNow()];
1258                 }
1259
1260                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1261
1262                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1263                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1264                         // Get the user information for the logging
1265                         $user = User::getById($uid);
1266
1267                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1268                         return 0;
1269                 }
1270
1271                 if ($notify) {
1272                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1273                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1274                         }
1275                         Hook::callAll('post_local_end', $posted_item);
1276                 } else {
1277                         Hook::callAll('post_remote_end', $posted_item);
1278                 }
1279
1280                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1281                         self::addShadow($post_user_id);
1282                 } else {
1283                         self::addShadowPost($post_user_id);
1284                 }
1285
1286                 self::updateContact($posted_item);
1287
1288                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1289
1290                 // Distribute items to users who subscribed to their tags
1291                 self::distributeByTags($posted_item);
1292
1293                 // Automatically reshare the item if the "remote_self" option is selected
1294                 self::autoReshare($posted_item);
1295
1296                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1297
1298                 if ($transmit) {
1299                         // Don't relay participation messages
1300                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1301                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1302                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1303                                 $transmit = false;
1304                         }
1305                 }
1306
1307                 if ($transmit) {
1308                         if (!empty($source)) {
1309                                 Post\Activity::insert($item['uri-id'], $source);
1310                         }
1311                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1312                 }
1313
1314                 // Fill the cache with the rendered content.
1315                 if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1316                         self::updateDisplayCache($posted_item['uri-id']);
1317                 }
1318
1319                 return $post_user_id;
1320         }
1321
1322         /**
1323          * Fetch the post reason for a given item array
1324          *
1325          * @param array $item
1326          *
1327          * @return integer
1328          */
1329         public static function getPostReason(array $item): int
1330         {
1331                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1332                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1333                         return self::PR_FOLLOWER;
1334                 }
1335
1336                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1337                         return self::PR_LOCAL;
1338                 }
1339
1340                 return $item['post-reason'] ?? self::PR_NONE;
1341         }
1342
1343         /**
1344          * Update the display cache
1345          *
1346          * @param integer $uri_id
1347          * @return void
1348          */
1349         public static function updateDisplayCache(int $uri_id)
1350         {
1351                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1352                 self::prepareBody($item, false, false, true);
1353         }
1354
1355         /**
1356          * Change the owner of a parent item if it had been shared by a forum
1357          *
1358          * (public) forum posts in the new format consist of the regular post by the author
1359          * followed by an announce message sent from the forum account.
1360          * Changing the owner helps in grouping forum posts.
1361          *
1362          * @param array $item
1363          * @return void
1364          */
1365         private static function setOwnerforResharedItem(array $item)
1366         {
1367                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1368                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1369                 if (!DBA::isResult($parent)) {
1370                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1371                         return;
1372                 }
1373
1374                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1375                 if (!DBA::isResult($author)) {
1376                         Logger::error('Author not found', ['id' => $item['author-id']]);
1377                         return;
1378                 }
1379
1380                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1381                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1382
1383                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1384                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1385                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1386                         return;
1387                 }
1388
1389                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1390                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1391                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1392                                 return;
1393                         }
1394
1395                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1396                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1397                                 return;
1398                         }
1399                 }
1400
1401                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1402                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1403         }
1404
1405         /**
1406          * Distribute the given item to users who subscribed to their tags
1407          *
1408          * @param array $item     Processed item
1409          */
1410         private static function distributeByTags(array $item)
1411         {
1412                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1413                         return;
1414                 }
1415
1416                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1417                 foreach ($uids as $uid) {
1418                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1419                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1420                 }
1421         }
1422
1423         /**
1424          * Distributes public items to the receivers
1425          *
1426          * @param integer $itemid      Item ID that should be added
1427          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1428          * @throws \Exception
1429          */
1430         public static function distribute(int $itemid, string $signed_text = '')
1431         {
1432                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1433                 $parent = Post::selectFirst(['owner-id'], $condition);
1434                 if (!DBA::isResult($parent)) {
1435                         Logger::warning('Item not found', ['condition' => $condition]);
1436                         return;
1437                 }
1438
1439                 // Only distribute public items from native networks
1440                 $condition = ['id' => $itemid, 'uid' => 0,
1441                         'network' => array_merge(Protocol::FEDERATED ,['']),
1442                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1443                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1444                 if (!DBA::isResult($item)) {
1445                         Logger::warning('Item not found', ['condition' => $condition]);
1446                         return;
1447                 }
1448
1449                 $origin = $item['origin'];
1450
1451                 $users = [];
1452
1453                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1454                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1455                 if (!DBA::isResult($owner)) {
1456                         return;
1457                 }
1458
1459                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1460                 $contacts = DBA::select('contact', ['uid'], $condition);
1461                 while ($contact = DBA::fetch($contacts)) {
1462                         if ($contact['uid'] == 0) {
1463                                 continue;
1464                         }
1465
1466                         $users[$contact['uid']] = $contact['uid'];
1467                 }
1468                 DBA::close($contacts);
1469
1470                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1471                 $contacts = DBA::select('contact', ['uid'], $condition);
1472                 while ($contact = DBA::fetch($contacts)) {
1473                         if ($contact['uid'] == 0) {
1474                                 continue;
1475                         }
1476
1477                         $users[$contact['uid']] = $contact['uid'];
1478                 }
1479                 DBA::close($contacts);
1480
1481                 if (!empty($owner['alias'])) {
1482                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1483                         $contacts = DBA::select('contact', ['uid'], $condition);
1484                         while ($contact = DBA::fetch($contacts)) {
1485                                 if ($contact['uid'] == 0) {
1486                                         continue;
1487                                 }
1488
1489                                 $users[$contact['uid']] = $contact['uid'];
1490                         }
1491                         DBA::close($contacts);
1492                 }
1493
1494                 $origin_uid = 0;
1495
1496                 if ($item['uri-id'] != $item['parent-uri-id']) {
1497                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1498                         while ($parent = Post::fetch($parents)) {
1499                                 $users[$parent['uid']] = $parent['uid'];
1500                                 if ($parent['origin'] && !$origin) {
1501                                         $origin_uid = $parent['uid'];
1502                                 }
1503                         }
1504                         DBA::close($parents);
1505                 }
1506
1507                 foreach ($users as $uid) {
1508                         if ($origin_uid == $uid) {
1509                                 $item['diaspora_signed_text'] = $signed_text;
1510                         }
1511                         $item['post-reason'] = self::PR_DISTRIBUTE;
1512                         self::storeForUser($item, $uid);
1513                 }
1514         }
1515
1516         /**
1517          * Store a public item defined by their URI-ID for the given users
1518          *
1519          * @param integer $uri_id     URI-ID of the given item
1520          * @param integer $uid        The user that will receive the item entry
1521          * @param array   $fields     Additional fields to be stored
1522          * @param integer $source_uid User id of the source post
1523          * @return integer stored item id
1524          */
1525         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1526         {
1527                 if ($uid == $source_uid) {
1528                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1529                         return 0;
1530                 }
1531
1532                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1533                 if (!DBA::isResult($item)) {
1534                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1535                         return 0;
1536                 }
1537
1538                 if (($uid != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
1539                         $owner = User::getOwnerDataById($uid);
1540                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1541                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1542                                 return 0;
1543                         }
1544                 }
1545
1546                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1547                         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']]);
1548                         return 0;
1549                 }
1550
1551                 $item['post-reason'] = self::PR_STORED;
1552
1553                 $item = array_merge($item, $fields);
1554
1555                 $item['post-reason'] = self::getPostReason($item);
1556
1557                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1558
1559                 if (($uid != 0) && (($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1560                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1561                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC])) {
1562                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id]);
1563                         return 0;
1564                 }
1565
1566                 $causer = $item['causer-id'] ?: $item['author-id'];
1567
1568                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1569                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1570                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1571                                 return 0;
1572                         }
1573                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1574                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1575                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1576                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1577                                 return 0;
1578                         }
1579                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1580                 }
1581
1582                 $stored = self::storeForUser($item, $uid);
1583                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1584                 return $stored;
1585         }
1586
1587         /**
1588          * Fetch the parent with the given uri-id
1589          *
1590          * @param integer $uri_id
1591          * @param integer $uid
1592          * @param integer $causer
1593          *
1594          * @return integer
1595          */
1596         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1597         {
1598                 // Fetch the origin user for the post
1599                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1600                 if (is_null($origin_uid)) {
1601                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1602                         return 0;
1603                 }
1604
1605                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1606         }
1607
1608         /**
1609          * Returns the origin uid of a post if the given user is allowed to see it.
1610          *
1611          * @param int $uriid
1612          * @param int $uid
1613          * @return int
1614          */
1615         private static function GetOriginUidForUriId(int $uriid, int $uid)
1616         {
1617                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1618                         return $uid;
1619                 }
1620
1621                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1622                 if (!empty($post)) {
1623                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1624                                 return $post['uid'];
1625                         }
1626
1627                         $pcid = Contact::getPublicIdByUserId($uid);
1628                         if (empty($pcid)) {
1629                                 return null;
1630                         }
1631
1632                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1633                                 if ($receiver == $pcid) {
1634                                         return $post['uid'];
1635                                 }
1636                         }
1637
1638                         return null;
1639                 }
1640
1641                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1642                         return 0;
1643                 }
1644
1645                 // When the post belongs to a a forum then all forum users are allowed to access it
1646                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1647                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1648                                 $target_uid = User::getIdForURL($tag['url']);
1649                                 if (!empty($target_uid)) {
1650                                         return $target_uid;
1651                                 }
1652                         }
1653                 }
1654
1655                 return null;
1656         }
1657
1658         /**
1659          * Store a public item array for the given users
1660          *
1661          * @param array   $item   The item entry that will be stored
1662          * @param integer $uid    The user that will receive the item entry
1663          * @return integer stored item id
1664          * @throws \Exception
1665          */
1666         private static function storeForUser(array $item, int $uid): int
1667         {
1668                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1669                 if (!empty($post['id'])) {
1670                         if (!empty($item['event-id'])) {
1671                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1672                                 if (!empty($event_post['event-id'])) {
1673                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1674                                         if (!empty($event)) {
1675                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1676                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1677                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1678                                         }
1679                                 }
1680                         }
1681                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1682                         return $post['id'];
1683                 }
1684
1685                 // Data from the "post-user" table
1686                 unset($item['id']);
1687                 unset($item['mention']);
1688                 unset($item['starred']);
1689                 unset($item['unseen']);
1690                 unset($item['psid']);
1691                 unset($item['pinned']);
1692                 unset($item['ignored']);
1693                 unset($item['pubmail']);
1694                 unset($item['event-id']);
1695                 unset($item['hidden']);
1696                 unset($item['notification-type']);
1697
1698                 // Data from the "post-delivery-data" table
1699                 unset($item['postopts']);
1700                 unset($item['inform']);
1701
1702                 $item['uid'] = $uid;
1703                 $item['origin'] = 0;
1704                 $item['wall'] = 0;
1705
1706                 $item['contact-id'] = self::contactId($item);
1707
1708                 $notify = false;
1709                 if ($item['gravity'] == GRAVITY_PARENT) {
1710                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1711                         if (DBA::isResult($contact)) {
1712                                 $notify = self::isRemoteSelf($contact, $item);
1713                         }
1714                 }
1715
1716                 $distributed = self::insert($item, $notify);
1717
1718                 if (!$distributed) {
1719                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1720                 } else {
1721                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1722                 }
1723                 return $distributed;
1724         }
1725
1726         /**
1727          * Add a shadow entry for a given item id that is a thread starter
1728          *
1729          * We store every public item entry additionally with the user id "0".
1730          * This is used for the community page and for the search.
1731          * It is planned that in the future we will store public item entries only once.
1732          *
1733          * @param integer $itemid Item ID that should be added
1734          * @throws \Exception
1735          */
1736         private static function addShadow(int $itemid)
1737         {
1738                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1739                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1740                 $item = Post::selectFirst($fields, $condition);
1741
1742                 if (!DBA::isResult($item)) {
1743                         return;
1744                 }
1745
1746                 // is it already a copy?
1747                 if (($itemid == 0) || ($item['uid'] == 0)) {
1748                         return;
1749                 }
1750
1751                 // Is it a visible public post?
1752                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1753                         return;
1754                 }
1755
1756                 // is it an entry from a connector? Only add an entry for natively connected networks
1757                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1758                         return;
1759                 }
1760
1761                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1762                         return;
1763                 }
1764
1765                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1766
1767                 if (DBA::isResult($item)) {
1768                         // Preparing public shadow (removing user specific data)
1769                         $item['uid'] = 0;
1770                         unset($item['id']);
1771                         unset($item['parent']);
1772                         unset($item['wall']);
1773                         unset($item['mention']);
1774                         unset($item['origin']);
1775                         unset($item['starred']);
1776                         unset($item['postopts']);
1777                         unset($item['inform']);
1778                         unset($item['post-reason']);
1779                         if ($item['uri-id'] == $item['parent-uri-id']) {
1780                                 $item['contact-id'] = $item['owner-id'];
1781                         } else {
1782                                 $item['contact-id'] = $item['author-id'];
1783                         }
1784
1785                         $public_shadow = self::insert($item);
1786
1787                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1788                 }
1789         }
1790
1791         /**
1792          * Add a shadow entry for a given item id that is a comment
1793          *
1794          * This function does the same like the function above - but for comments
1795          *
1796          * @param integer $itemid Item ID that should be added
1797          * @throws \Exception
1798          */
1799         private static function addShadowPost(int $itemid)
1800         {
1801                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1802                 if (!DBA::isResult($item)) {
1803                         return;
1804                 }
1805
1806                 // Is it a toplevel post?
1807                 if ($item['gravity'] == GRAVITY_PARENT) {
1808                         self::addShadow($itemid);
1809                         return;
1810                 }
1811
1812                 // Is this a shadow entry?
1813                 if ($item['uid'] == 0) {
1814                         return;
1815                 }
1816
1817                 // Is there a shadow parent?
1818                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1819                         return;
1820                 }
1821
1822                 // Is there already a shadow entry?
1823                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1824                         return;
1825                 }
1826
1827                 // Save "origin" and "parent" state
1828                 $origin = $item['origin'];
1829                 $parent = $item['parent'];
1830
1831                 // Preparing public shadow (removing user specific data)
1832                 $item['uid'] = 0;
1833                 unset($item['id']);
1834                 unset($item['parent']);
1835                 unset($item['wall']);
1836                 unset($item['mention']);
1837                 unset($item['origin']);
1838                 unset($item['starred']);
1839                 unset($item['postopts']);
1840                 unset($item['inform']);
1841                 unset($item['post-reason']);
1842                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1843
1844                 $public_shadow = self::insert($item);
1845
1846                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1847
1848                 // If this was a comment to a Diaspora post we don't get our comment back.
1849                 // This means that we have to distribute the comment by ourselves.
1850                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1851                         self::distribute($public_shadow);
1852                 }
1853         }
1854
1855         /**
1856          * Adds a language specification in a "language" element of given $arr.
1857          * Expects "body" element to exist in $arr.
1858          *
1859          * @param array $item
1860          * @return string detected language
1861          * @throws \Text_LanguageDetect_Exception
1862          */
1863         private static function getLanguage(array $item): string
1864         {
1865                 if (!empty($item['language'])) {
1866                         return $item['language'];
1867                 }
1868
1869                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1870                         return '';
1871                 }
1872
1873                 $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
1874                 if (empty($languages)) {
1875                         return '';
1876                 }
1877
1878                 return json_encode($languages);
1879         }
1880
1881         /**
1882          * Get a language array from a given text
1883          *
1884          * @param string  $body
1885          * @param integer $count
1886          * @return array
1887          */
1888         public static function getLanguageArray(string $body, int $count): array
1889         {
1890                 // Convert attachments to links
1891                 $naked_body = BBCode::removeAttachment($body);
1892                 if (empty($naked_body)) {
1893                         return [];
1894                 }
1895
1896                 // Remove links and pictures
1897                 $naked_body = BBCode::removeLinks($naked_body);
1898
1899                 // Convert the title and the body to plain text
1900                 $naked_body = BBCode::toPlaintext($naked_body);
1901
1902                 // Remove possibly remaining links
1903                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1904
1905                 if (empty($naked_body)) {
1906                         return [];
1907                 }
1908
1909                 $naked_body = self::getDominantLanguage($naked_body);
1910
1911                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1912                 // See https://github.com/friendica/friendica/issues/10511
1913                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1914                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1915                 $availableLanguages['fa'] = 'fa';
1916
1917                 $ld = new Language(array_keys($availableLanguages));
1918                 return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
1919         }
1920
1921         /**
1922          * Check if latin or non latin are dominant in the body and only return the dominant one
1923          *
1924          * @param string $body
1925          * @return string
1926          */
1927         private static function getDominantLanguage(string $body): string
1928         {
1929                 $latin = '';
1930                 $non_latin = '';
1931                 for ($i = 0; $i < mb_strlen($body); $i++) {
1932                         $character = mb_substr($body, $i, 1);
1933                         $ord = mb_ord($character);
1934
1935                         // We add the most common characters to both strings.
1936                         if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
1937                                 $latin .= $character;
1938                                 $non_latin .= $character;
1939                         } elseif ($ord < 768) {
1940                                 $latin .= $character;
1941                         } else {
1942                                 $non_latin .= $character;
1943                         }
1944                 }
1945                 return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
1946         }
1947
1948         public static function getLanguageMessage(array $item): string
1949         {
1950                 $iso639 = new \Matriphe\ISO639\ISO639;
1951
1952                 $used_languages = '';
1953                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1954                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1955                 }
1956                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1957                 return $used_languages;
1958         }
1959
1960         /**
1961          * Creates an unique guid out of a given uri.
1962          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1963          * Posts that are created on this system are using System::createUUID.
1964          * Received ActivityPub posts are using Processor::getGUIDByURL.
1965          *
1966          * @param string      $uri uri of an item entry
1967          * @param string|null $host hostname for the GUID prefix
1968          * @return string Unique guid
1969          */
1970         public static function guidFromUri(string $uri, string $host = null): string
1971         {
1972                 // Our regular guid routine is using this kind of prefix as well
1973                 // We have to avoid that different routines could accidentally create the same value
1974                 $parsed = parse_url($uri);
1975
1976                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1977                 unset($parsed['scheme']);
1978
1979                 // Glue it together to be able to make a hash from it
1980                 $host_id = implode('/', $parsed);
1981
1982                 // Use a mixture of several hashes to provide some GUID like experience
1983                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1984         }
1985
1986         /**
1987          * generate an unique URI
1988          *
1989          * @param string $guid An existing GUID (Otherwise it will be generated)
1990          *
1991          * @return string
1992          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1993          */
1994         public static function newURI(string $guid = ''): string
1995         {
1996                 if ($guid == '') {
1997                         $guid = System::createUUID();
1998                 }
1999
2000                 return DI::baseUrl()->get() . '/objects/' . $guid;
2001         }
2002
2003         /**
2004          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2005          *
2006          * This can be used to filter for inactive contacts.
2007          * Only do this for public postings to avoid privacy problems, since poco data is public.
2008          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2009          *
2010          * @param array $arr Contains the just posted item record
2011          * @throws \Exception
2012          */
2013         private static function updateContact(array $arr)
2014         {
2015                 // Unarchive the author
2016                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2017                 if (DBA::isResult($contact)) {
2018                         Contact::unmarkForArchival($contact);
2019                 }
2020
2021                 // Unarchive the contact if it's not our own contact
2022                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2023                 if (DBA::isResult($contact)) {
2024                         Contact::unmarkForArchival($contact);
2025                 }
2026
2027                 /// @todo On private posts we could obfuscate the date
2028                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2029
2030                 // Is it a forum? Then we don't care about the rules from above
2031                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2032                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2033                                 $update = true;
2034                         }
2035                 }
2036
2037                 if ($update) {
2038                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2039                         // So we have to ensure to only update the last item when it had been our own post,
2040                         // or it had been done by a "regular" contact.
2041                         if (!empty($arr['wall'])) {
2042                                 $condition = ['id' => $arr['contact-id']];
2043                         } else {
2044                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2045                         }
2046                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2047                 }
2048                 // Now do the same for the system wide contacts with uid=0
2049                 if ($arr['private'] != self::PRIVATE) {
2050                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2051                                 ['id' => $arr['owner-id']]);
2052
2053                         if ($arr['owner-id'] != $arr['author-id']) {
2054                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2055                                         ['id' => $arr['author-id']]);
2056                         }
2057                 }
2058         }
2059
2060         public static function setHashtags(string $body): string
2061         {
2062                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2063                         $tags = BBCode::getTags($body);
2064
2065                         // No hashtags?
2066                         if (!count($tags)) {
2067                                 return $body;
2068                         }
2069
2070                         // This sorting is important when there are hashtags that are part of other hashtags
2071                         // Otherwise there could be problems with hashtags like #test and #test2
2072                         // Because of this we are sorting from the longest to the shortest tag.
2073                         usort($tags, function ($a, $b) {
2074                                 return strlen($b) <=> strlen($a);
2075                         });
2076
2077                         $URLSearchString = "^\[\]";
2078
2079                         // All hashtags should point to the home server if "local_tags" is activated
2080                         if (DI::config()->get('system', 'local_tags')) {
2081                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2082                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2083                         }
2084
2085                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2086                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2087                                 function ($match) {
2088                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2089                                 }, $body);
2090
2091                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2092                                 function ($match) {
2093                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2094                                 }, $body);
2095
2096                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2097                                 function ($match) {
2098                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2099                                 }, $body);
2100
2101                         // Repair recursive urls
2102                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2103                                 "&num;$2", $body);
2104
2105                         foreach ($tags as $tag) {
2106                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2107                                         continue;
2108                                 }
2109
2110                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2111                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2112
2113                                 $body = str_replace($tag, $newtag, $body);
2114                         }
2115
2116                         // Convert back the masked hashtags
2117                         $body = str_replace("&num;", "#", $body);
2118
2119                         return $body;
2120                 });
2121
2122                 return $body;
2123         }
2124
2125         /**
2126          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2127          *
2128          * @param int $uid
2129          * @param int $item_id
2130          * @return boolean true if item was deleted, else false
2131          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2132          * @throws \ImagickException
2133          */
2134         private static function tagDeliver(int $uid, int $item_id): bool
2135         {
2136                 $mention = false;
2137
2138                 $owner = User::getOwnerDataById($uid);
2139                 if (!DBA::isResult($owner)) {
2140                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2141                         return false;
2142                 }
2143
2144                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2145                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2146                         return false;
2147                 }
2148
2149                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
2150                 if (!DBA::isResult($item)) {
2151                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2152                         return false;
2153                 }
2154
2155                 if ($item['gravity'] == GRAVITY_PARENT) {
2156                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2157                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2158                         } else {
2159                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2160                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2161                                 return true;
2162                         }
2163
2164                         $arr = ['item' => $item, 'user' => $owner];
2165
2166                         Hook::callAll('tagged', $arr);
2167                 } else {
2168                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2169                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2170                         } else {
2171                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2172                                 return false;
2173                         }
2174                 }
2175
2176                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2177
2178                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2179                         $allow_cid = '';
2180                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2181                         $deny_cid  = '';
2182                         $deny_gid  = '';
2183                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2184                 } else {
2185                         self::performActivity($item['id'], 'announce', $uid);
2186                 }
2187
2188                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2189                 return false;
2190         }
2191
2192         /**
2193          * Automatically reshare the item if the "remote_self" option is selected
2194          *
2195          * @param array $item
2196          * @return void
2197          */
2198         private static function autoReshare(array $item)
2199         {
2200                 if ($item['gravity'] != GRAVITY_PARENT) {
2201                         return;
2202                 }
2203
2204                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2205                         return;
2206                 }
2207
2208                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2209                         return;
2210                 }
2211
2212                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2213
2214                 self::performActivity($item['id'], 'announce', $item['uid']);
2215         }
2216
2217         public static function isRemoteSelf(array $contact, array &$datarray): bool
2218         {
2219                 if (!$contact['remote_self']) {
2220                         return false;
2221                 }
2222
2223                 // Prevent the forwarding of posts that are forwarded
2224                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2225                         Logger::info('Already forwarded');
2226                         return false;
2227                 }
2228
2229                 // Prevent to forward already forwarded posts
2230                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2231                         Logger::info('Already forwarded (second test)');
2232                         return false;
2233                 }
2234
2235                 // Only forward posts
2236                 if ($datarray["verb"] != Activity::POST) {
2237                         Logger::info('No post');
2238                         return false;
2239                 }
2240
2241                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2242                         Logger::info('Not public');
2243                         return false;
2244                 }
2245
2246                 $datarray2 = $datarray;
2247                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2248                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2249                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2250                                         ['uid' => $contact['uid'], 'self' => true]);
2251                         if (DBA::isResult($self)) {
2252                                 $datarray['contact-id'] = $self["id"];
2253
2254                                 $datarray['owner-name'] = $self["name"];
2255                                 $datarray['owner-link'] = $self["url"];
2256                                 $datarray['owner-avatar'] = $self["thumb"];
2257
2258                                 $datarray['author-name']   = $datarray['owner-name'];
2259                                 $datarray['author-link']   = $datarray['owner-link'];
2260                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2261
2262                                 unset($datarray['edited']);
2263
2264                                 unset($datarray['network']);
2265                                 unset($datarray['owner-id']);
2266                                 unset($datarray['author-id']);
2267                         }
2268
2269                         if ($contact['network'] != Protocol::FEED) {
2270                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2271                                 $datarray["guid"] = System::createUUID();
2272                                 unset($datarray["plink"]);
2273                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2274                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2275                                 $datarray["extid"] = Protocol::DFRN;
2276                                 $urlpart = parse_url($datarray2['author-link']);
2277                                 $datarray["app"] = $urlpart["host"];
2278                                 if (!empty($old_uri_id)) {
2279                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2280                                 }
2281
2282                                 unset($datarray["parent-uri"]);
2283                                 unset($datarray["thr-parent"]);
2284                         } else {
2285                                 $datarray['private'] = self::PUBLIC;
2286                         }
2287                 }
2288
2289                 if ($contact['network'] != Protocol::FEED) {
2290                         // Store the original post
2291                         $result = self::insert($datarray2);
2292                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2293                 } else {
2294                         $datarray["app"] = "Feed";
2295                         $result = true;
2296                 }
2297
2298                 return (bool)$result;
2299         }
2300
2301         /**
2302          *
2303          * @param string $s
2304          * @param int    $uid
2305          * @param array  $item
2306          * @param int    $cid
2307          * @return string
2308          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2309          * @throws \ImagickException
2310          */
2311         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2312         {
2313                 if (DI::config()->get('system', 'disable_embedded')) {
2314                         return $s;
2315                 }
2316
2317                 Logger::info('check for photos');
2318                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2319
2320                 $orig_body = $s;
2321                 $new_body = '';
2322
2323                 $img_start = strpos($orig_body, '[img');
2324                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2325                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2326
2327                 while (($img_st_close !== false) && ($img_len !== false)) {
2328                         $img_st_close++; // make it point to AFTER the closing bracket
2329                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2330
2331                         Logger::info('found photo', ['image' => $image]);
2332
2333                         if (stristr($image, $site . '/photo/')) {
2334                                 // Only embed locally hosted photos
2335                                 $replace = false;
2336                                 $i = basename($image);
2337                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2338                                 $x = strpos($i, '-');
2339
2340                                 if ($x) {
2341                                         $res = substr($i, $x + 1);
2342                                         $i = substr($i, 0, $x);
2343                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2344                                         if (DBA::isResult($photo)) {
2345                                                 /*
2346                                                  * Check to see if we should replace this photo link with an embedded image
2347                                                  * 1. No need to do so if the photo is public
2348                                                  * 2. If there's a contact-id provided, see if they're in the access list
2349                                                  *    for the photo. If so, embed it.
2350                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2351                                                  *    permissions, regardless of order but first check to see if they're an exact
2352                                                  *    match to save some processing overhead.
2353                                                  */
2354                                                 if (self::hasPermissions($photo)) {
2355                                                         if ($cid) {
2356                                                                 $recips = self::enumeratePermissions($photo);
2357                                                                 if (in_array($cid, $recips)) {
2358                                                                         $replace = true;
2359                                                                 }
2360                                                         } elseif ($item) {
2361                                                                 if (self::samePermissions($uid, $item, $photo)) {
2362                                                                         $replace = true;
2363                                                                 }
2364                                                         }
2365                                                 }
2366                                                 if ($replace) {
2367                                                         $photo_img = Photo::getImageForPhoto($photo);
2368                                                         // If a custom width and height were specified, apply before embedding
2369                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2370                                                                 Logger::info('scaling photo');
2371
2372                                                                 $width = intval($match[1]);
2373                                                                 $height = intval($match[2]);
2374
2375                                                                 $photo_img->scaleDown(max($width, $height));
2376                                                         }
2377
2378                                                         $data = $photo_img->asString();
2379                                                         $type = $photo_img->getType();
2380
2381                                                         Logger::info('replacing photo');
2382                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2383                                                         Logger::debug('replaced', ['image' => $image]);
2384                                                 }
2385                                         }
2386                                 }
2387                         }
2388
2389                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2390                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2391                         if ($orig_body === false) {
2392                                 $orig_body = '';
2393                         }
2394
2395                         $img_start = strpos($orig_body, '[img');
2396                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2397                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2398                 }
2399
2400                 $new_body = $new_body . $orig_body;
2401
2402                 return $new_body;
2403         }
2404
2405         private static function hasPermissions(array $obj)
2406         {
2407                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2408                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2409         }
2410
2411         // @TODO $uid is unused parameter
2412         private static function samePermissions($uid, array $obj1, array $obj2): bool
2413         {
2414                 // first part is easy. Check that these are exactly the same.
2415                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2416                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2417                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2418                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2419                         return true;
2420                 }
2421
2422                 // This is harder. Parse all the permissions and compare the resulting set.
2423                 $recipients1 = self::enumeratePermissions($obj1);
2424                 $recipients2 = self::enumeratePermissions($obj2);
2425                 sort($recipients1);
2426                 sort($recipients2);
2427
2428                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2429                 return ($recipients1 == $recipients2);
2430         }
2431
2432         /**
2433          * Returns an array of contact-ids that are allowed to see this object
2434          *
2435          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2436          * @param bool  $check_dead Prunes unavailable contacts from the result
2437          * @return array
2438          * @throws \Exception
2439          */
2440         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2441         {
2442                 $aclFormater = DI::aclFormatter();
2443
2444                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2445                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2446                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2447                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2448                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2449                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2450                 $recipients   = array_diff($recipients, $deny);
2451                 return $recipients;
2452         }
2453
2454         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2455         {
2456                 if (!$uid || ($days < 1)) {
2457                         return;
2458                 }
2459
2460                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2461                         $uid, GRAVITY_PARENT];
2462
2463                 /*
2464                  * $expire_network_only = save your own wall posts
2465                  * and just expire conversations started by others
2466                  */
2467                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2468
2469                 if ($expire_network_only) {
2470                         $condition[0] .= " AND NOT `wall`";
2471                 }
2472
2473                 if ($network != "") {
2474                         $condition[0] .= " AND `network` = ?";
2475                         $condition[] = $network;
2476                 }
2477
2478                 $condition[0] .= " AND `received` < ?";
2479                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2480
2481                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2482
2483                 if (!DBA::isResult($items)) {
2484                         return;
2485                 }
2486
2487                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2488
2489                 // Forcing expiring of items - but not notes and marked items
2490                 if ($force) {
2491                         $expire_items = true;
2492                 }
2493
2494                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2495                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2496                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2497
2498                 $expired = 0;
2499
2500                 $priority = DI::config()->get('system', 'expire-notify-priority');
2501
2502                 while ($item = Post::fetch($items)) {
2503                         // don't expire filed items
2504                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2505                                 continue;
2506                         }
2507
2508                         // Only expire posts, not photos and photo comments
2509
2510                         if (!$expire_photos && !empty($item['resource-id'])) {
2511                                 continue;
2512                         } elseif (!$expire_starred && intval($item['starred'])) {
2513                                 continue;
2514                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2515                                 continue;
2516                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2517                                 continue;
2518                         }
2519
2520                         self::markForDeletionById($item['id'], $priority);
2521
2522                         ++$expired;
2523                 }
2524                 DBA::close($items);
2525                 Logger::notice('Expired', ['user' => $uid, 'days' => $days, 'network' => $network, 'force' => $force, 'expired' => $expired, 'expire items' => $expire_items, 'expire notes' => $expire_notes, 'expire starred' => $expire_starred, 'expire photos' => $expire_photos, 'condition' => $condition]);
2526         }
2527
2528         public static function firstPostDate(int $uid, bool $wall = false)
2529         {
2530                 $user = User::getById($uid, ['register_date']);
2531                 if (empty($user)) {
2532                         return false;
2533                 }
2534
2535                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2536                         $uid, $wall, $user['register_date']];
2537                 $params = ['order' => ['received' => false]];
2538                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2539                 if (DBA::isResult($thread)) {
2540                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2541                         return $postdate;
2542                 }
2543                 return false;
2544         }
2545
2546         /**
2547          * add/remove activity to an item
2548          *
2549          * Toggle activities as like,dislike,attend of an item
2550          *
2551          * @param int    $item_id
2552          * @param string $verb
2553          *            Activity verb. One of
2554          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2555          *            attendno, unattendno, attendmaybe, unattendmaybe,
2556          *            announce, unannouce
2557          * @param int    $uid
2558          * @param string $allow_cid
2559          * @param string $allow_gid
2560          * @param string $deny_cid
2561          * @param string $deny_gid
2562          * @return bool
2563          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2564          * @throws \ImagickException
2565          * @hook  'post_local_end'
2566          *            array $arr
2567          *            'post_id' => ID of posted item
2568          */
2569         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2570         {
2571                 if (empty($uid)) {
2572                         return false;
2573                 }
2574
2575                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2576
2577                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2578                 if (!DBA::isResult($item)) {
2579                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2580                         return false;
2581                 }
2582
2583                 $uri_id = $item['uri-id'];
2584
2585                 if (!in_array($item['uid'], [0, $uid])) {
2586                         return false;
2587                 }
2588
2589                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2590                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2591                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2592                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2593                                 if (!DBA::isResult($item)) {
2594                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2595                                         return false;
2596                                 }
2597                         }
2598                 }
2599
2600                 // Retrieves the local post owner
2601                 $owner = User::getOwnerDataById($uid);
2602                 if (empty($owner)) {
2603                         Logger::info('Empty owner for user', ['uid' => $uid]);
2604                         return false;
2605                 }
2606
2607                 // Retrieve the current logged in user's public contact
2608                 $author_id = Contact::getPublicIdByUserId($uid);
2609                 if (empty($author_id)) {
2610                         Logger::info('Empty public contact');
2611                         return false;
2612                 }
2613
2614                 $activity = null;
2615                 switch ($verb) {
2616                         case 'like':
2617                         case 'unlike':
2618                                 $activity = Activity::LIKE;
2619                                 break;
2620                         case 'dislike':
2621                         case 'undislike':
2622                                 $activity = Activity::DISLIKE;
2623                                 break;
2624                         case 'attendyes':
2625                         case 'unattendyes':
2626                                 $activity = Activity::ATTEND;
2627                                 break;
2628                         case 'attendno':
2629                         case 'unattendno':
2630                                 $activity = Activity::ATTENDNO;
2631                                 break;
2632                         case 'attendmaybe':
2633                         case 'unattendmaybe':
2634                                 $activity = Activity::ATTENDMAYBE;
2635                                 break;
2636                         case 'follow':
2637                         case 'unfollow':
2638                                 $activity = Activity::FOLLOW;
2639                                 break;
2640                         case 'announce':
2641                         case 'unannounce':
2642                                 $activity = Activity::ANNOUNCE;
2643                                 break;
2644                         default:
2645                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2646                                 return false;
2647                 }
2648
2649                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2650
2651                 // Enable activity toggling instead of on/off
2652                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2653
2654                 // Look for an existing verb row
2655                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2656                 if ($event_verb_flag) {
2657                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2658
2659                         // Translate to the index based activity index
2660                         $vids = [];
2661                         foreach ($verbs as $verb) {
2662                                 $vids[] = Verb::getID($verb);
2663                         }
2664                 } else {
2665                         $vids = Verb::getID($activity);
2666                 }
2667
2668                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2669                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2670                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2671
2672                 if (DBA::isResult($like_item)) {
2673                         /**
2674                          * Truth table for existing activities
2675                          *
2676                          * |          Inputs            ||      Outputs      |
2677                          * |----------------------------||-------------------|
2678                          * |  Mode  | Event | Same verb || Delete? | Return? |
2679                          * |--------|-------|-----------||---------|---------|
2680                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2681                          * | create |  Yes  |    No     ||   Yes   |   No    |
2682                          * | create |  No   |    Yes    ||   No    |   Yes   |
2683                          * | create |  No   |    No     ||        N/A†       |
2684                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2685                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2686                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2687                          * | delete |  No   |    No     ||        N/A†       |
2688                          * |--------|-------|-----------||---------|---------|
2689                          * |   A    |   B   |     C     || A xor C | !B or C |
2690                          *
2691                          * † Can't happen: It's impossible to find an existing non-event activity without
2692                          *                 the same verb because we are only looking for this single verb.
2693                          *
2694                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2695                          */
2696                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2697                                 self::markForDeletionById($like_item['id']);
2698                         }
2699
2700                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2701                                 return true;
2702                         }
2703                 }
2704
2705                 // No need to go further if we aren't creating anything
2706                 if ($mode == 'delete') {
2707                         return true;
2708                 }
2709
2710                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2711
2712                 $new_item = [
2713                         'guid'          => System::createUUID(),
2714                         'uri'           => self::newURI(),
2715                         'uid'           => $uid,
2716                         'contact-id'    => $owner['id'],
2717                         'wall'          => $item['wall'],
2718                         'origin'        => 1,
2719                         'network'       => Protocol::DFRN,
2720                         'protocol'      => Conversation::PARCEL_DIRECT,
2721                         'direction'     => Conversation::PUSH,
2722                         'gravity'       => GRAVITY_ACTIVITY,
2723                         'parent'        => $item['id'],
2724                         'thr-parent'    => $item['uri'],
2725                         'owner-id'      => $author_id,
2726                         'author-id'     => $author_id,
2727                         'body'          => $activity,
2728                         'verb'          => $activity,
2729                         'object-type'   => $objtype,
2730                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2731                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2732                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2733                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2734                         'visible'       => 1,
2735                         'unseen'        => 1,
2736                 ];
2737
2738                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2739                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2740                         if (!empty($signed)) {
2741                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2742                         }
2743                 }
2744
2745                 self::insert($new_item, true);
2746
2747                 // If the parent item isn't visible then set it to visible
2748                 // @todo Check if this is still needed
2749                 if (!$item['visible']) {
2750                         self::update(['visible' => true], ['id' => $item['id']]);
2751                 }
2752                 return true;
2753         }
2754
2755         /**
2756          * Fetch the SQL condition for the given user id
2757          *
2758          * @param integer $owner_id User ID for which the permissions should be fetched
2759          * @return array condition
2760          */
2761         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2762         {
2763                 $local_user = local_user();
2764                 $remote_user = Session::getRemoteContactID($owner_id);
2765
2766                 // default permissions - anonymous user
2767                 $condition = ["`private` != ?", self::PRIVATE];
2768
2769                 if ($local_user && ($local_user == $owner_id)) {
2770                         // Profile owner - everything is visible
2771                         $condition = [];
2772                 } elseif ($remote_user) {
2773                          // Authenticated visitor - fetch the matching permissionsets
2774                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2775                         if (!empty($set)) {
2776                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2777                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2778                                         self::PRIVATE, self::PRIVATE];
2779                                 $condition = array_merge($condition, $permissionSets->column('id'));
2780                         }
2781                 }
2782
2783                 return $condition;
2784         }
2785
2786         /**
2787          * Get a permission SQL string for the given user
2788          *
2789          * @param int $owner_id
2790          * @param string $table
2791          * @return string
2792          */
2793         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2794         {
2795                 $local_user = local_user();
2796                 $remote_user = Session::getRemoteContactID($owner_id);
2797
2798                 if (!empty($table)) {
2799                         $table = DBA::quoteIdentifier($table) . '.';
2800                 }
2801
2802                 /*
2803                  * Construct permissions
2804                  *
2805                  * default permissions - anonymous user
2806                  */
2807                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2808
2809                 // Profile owner - everything is visible
2810                 if ($local_user && ($local_user == $owner_id)) {
2811                         $sql = '';
2812                 } elseif ($remote_user) {
2813                         /*
2814                          * Authenticated visitor. Unless pre-verified,
2815                          * check that the contact belongs to this $owner_id
2816                          * and load the groups the visitor belongs to.
2817                          * If pre-verified, the caller is expected to have already
2818                          * done this and passed the groups into this function.
2819                          */
2820                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2821
2822                         if (!empty($set)) {
2823                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2824                         } else {
2825                                 $sql_set = '';
2826                         }
2827
2828                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2829                 }
2830
2831                 return $sql;
2832         }
2833
2834         /**
2835          * get translated item type
2836          *
2837          * @param array                $item
2838          * @param \Friendica\Core\L10n $l10n
2839          * @return string
2840          */
2841         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2842         {
2843                 if (!empty($item['event-id'])) {
2844                         return $l10n->t('event');
2845                 } elseif (!empty($item['resource-id'])) {
2846                         return $l10n->t('photo');
2847                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2848                         return $l10n->t('activity');
2849                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2850                         return $l10n->t('comment');
2851                 }
2852
2853                 return $l10n->t('post');
2854         }
2855
2856         /**
2857          * Sets the "rendered-html" field of the provided item
2858          *
2859          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2860          *
2861          * @param array $item
2862          *
2863          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2864          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2865          */
2866         private static function putInCache(&$item)
2867         {
2868                 // Save original body to prevent addons to modify it
2869                 $body = $item['body'];
2870
2871                 $rendered_hash = $item['rendered-hash'] ?? '';
2872                 $rendered_html = $item['rendered-html'] ?? '';
2873
2874                 if ($rendered_hash == ''
2875                         || $rendered_html == ''
2876                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2877                         || DI::config()->get('system', 'ignore_cache')
2878                 ) {
2879                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2880                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2881
2882                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2883                         Hook::callAll('put_item_in_cache', $hook_data);
2884                         $item['rendered-html'] = $hook_data['rendered-html'];
2885                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2886                         unset($hook_data);
2887
2888                         // Update if the generated values differ from the existing ones
2889                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2890                                 self::update(
2891                                         [
2892                                                 'rendered-html' => $item['rendered-html'],
2893                                                 'rendered-hash' => $item['rendered-hash']
2894                                         ],
2895                                         ['id' => $item['id']]
2896                                 );
2897                         }
2898                 }
2899
2900                 $item['body'] = $body;
2901         }
2902
2903         /**
2904          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2905          * If attach is true, also add icons for item attachments.
2906          *
2907          * @param array   $item Record from item table
2908          * @param boolean $attach If true, add icons for item attachments as well
2909          * @param boolean $is_preview Whether this is a preview
2910          * @param boolean $only_cache Whether only cached HTML should be updated
2911          * @return string item body html
2912          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2913          * @throws \ImagickException
2914          * @hook  prepare_body_init item array before any work
2915          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2916          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2917          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2918          */
2919         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2920         {
2921                 $a = DI::app();
2922                 Hook::callAll('prepare_body_init', $item);
2923
2924                 // In order to provide theme developers more possibilities, event items
2925                 // are treated differently.
2926                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2927                         $ev = Event::getItemHTML($item);
2928                         return $ev;
2929                 }
2930
2931                 $tags = Tag::populateFromItem($item);
2932
2933                 $item['tags'] = $tags['tags'];
2934                 $item['hashtags'] = $tags['hashtags'];
2935                 $item['mentions'] = $tags['mentions'];
2936
2937                 $body = $item['body'] ?? '';
2938                 $shared = BBCode::fetchShareAttributes($body);
2939                 if (!empty($shared['guid'])) {
2940                         $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
2941                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2942                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2943                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
2944                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2945                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2946                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2947                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2948                 } else {
2949                         $shared_uri_id = 0;
2950                         $shared_links = [];
2951                 }
2952
2953                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
2954                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2955
2956                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2957                 self::putInCache($item);
2958                 $item['body'] = $body;
2959                 $s = $item["rendered-html"];
2960
2961                 if ($only_cache) {
2962                         return '';
2963                 }
2964
2965                 // Compile eventual content filter reasons
2966                 $filter_reasons = [];
2967                 if (!$is_preview && public_contact() != $item['author-id']) {
2968                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2969                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2970                         }
2971
2972                         $item['attachments'] = $attachments;
2973
2974                         $hook_data = [
2975                                 'item' => $item,
2976                                 'filter_reasons' => $filter_reasons
2977                         ];
2978                         Hook::callAll('prepare_body_content_filter', $hook_data);
2979                         $filter_reasons = $hook_data['filter_reasons'];
2980                         unset($hook_data);
2981                 }
2982
2983                 $hook_data = [
2984                         'item' => $item,
2985                         'html' => $s,
2986                         'preview' => $is_preview,
2987                         'filter_reasons' => $filter_reasons
2988                 ];
2989                 Hook::callAll('prepare_body', $hook_data);
2990                 $s = $hook_data['html'];
2991                 unset($hook_data);
2992
2993                 if (!$attach) {
2994                         // Replace the blockquotes with quotes that are used in mails.
2995                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2996                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2997                         return $s;
2998                 }
2999
3000                 if (!empty($shared_attachments)) {
3001                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
3002                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
3003                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
3004                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
3005                 }
3006
3007                 $s = self::addVisualAttachments($attachments, $item, $s, false);
3008                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
3009                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
3010                 $s = self::addQuestions($item, $s);
3011
3012                 // Map.
3013                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3014                         $x = Map::byCoordinates(trim($item['coord']));
3015                         if ($x) {
3016                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3017                         }
3018                 }
3019
3020                 // Replace friendica image url size with theme preference.
3021                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3022                         $ps = $a->getThemeInfoValue('item_image_size');
3023                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3024                 }
3025
3026                 $s = HTML::applyContentFilter($s, $filter_reasons);
3027
3028                 $hook_data = ['item' => $item, 'html' => $s];
3029                 Hook::callAll('prepare_body_final', $hook_data);
3030
3031                 return $hook_data['html'];
3032         }
3033
3034         /**
3035          * Check if the body contains a link
3036          *
3037          * @param string $body
3038          * @param string $url
3039          * @param int    $type
3040          * @return bool
3041          */
3042         public static function containsLink(string $body, string $url, int $type = 0): bool
3043         {
3044                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3045                 $urlparts = parse_url($url);
3046                 if (!empty($urlparts)) {
3047                         unset($urlparts['query']);
3048                         unset($urlparts['fragment']);
3049                         $url = (string)Uri::fromParts($urlparts);
3050                 } else {
3051                         return false;
3052                 }
3053
3054                 // Remove media links to only search in embedded content
3055                 // @todo Check images for image link, audio for audio links, ...
3056                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3057                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3058                 }
3059
3060                 if (strpos($body, $url)) {
3061                         return true;
3062                 }
3063                 foreach ([0, 1, 2] as $size) {
3064                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3065                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3066                                 return true;
3067                         }
3068                 }
3069                 return false;
3070         }
3071
3072         /**
3073          * Replace visual attachments in the body
3074          *
3075          * @param array $attachments
3076          * @param string $body
3077          * @return string modified body
3078          */
3079         private static function replaceVisualAttachments(array $attachments, string $body): string
3080         {
3081                 DI::profiler()->startRecording('rendering');
3082
3083                 foreach ($attachments['visual'] as $attachment) {
3084                         if (!empty($attachment['preview'])) {
3085                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3086                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3087                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3088
3089                                 $body = str_replace($search, $replace, $body);
3090                         } elseif ($attachment['filetype'] == 'image') {
3091                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3092                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3093                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3094
3095                                 $body = str_replace($search, $replace, $body);
3096                         }
3097                 }
3098                 DI::profiler()->stopRecording();
3099                 return $body;
3100         }
3101
3102         /**
3103          * Add visual attachments to the content
3104          *
3105          * @param array $attachments
3106          * @param array $item
3107          * @param string $content
3108          * @return string modified content
3109          */
3110         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3111         {
3112                 DI::profiler()->startRecording('rendering');
3113                 $leading = '';
3114                 $trailing = '';
3115
3116                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3117                 foreach ($attachments['visual'] as $attachment) {
3118                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3119                                 continue;
3120                         }
3121
3122                         if (!empty($attachment['preview'])) {
3123                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3124                         } else {
3125                                 $preview_url = '';
3126                         }
3127
3128                         if (($attachment['filetype'] == 'video')) {
3129                                 /// @todo Move the template to /content as well
3130                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3131                                         '$video' => [
3132                                                 'id'      => $attachment['id'],
3133                                                 'src'     => $attachment['url'],
3134                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3135                                                 'preview' => $preview_url,
3136                                                 'mime'    => $attachment['mimetype'],
3137                                         ],
3138                                 ]);
3139                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3140                                         $leading .= $media;
3141                                 } else {
3142                                         $trailing .= $media;
3143                                 }
3144                         } elseif ($attachment['filetype'] == 'audio') {
3145                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3146                                         '$audio' => [
3147                                                 'id'     => $attachment['id'],
3148                                                 'src'    => $attachment['url'],
3149                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3150                                                 'mime'   => $attachment['mimetype'],
3151                                         ],
3152                                 ]);
3153                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3154                                         $leading .= $media;
3155                                 } else {
3156                                         $trailing .= $media;
3157                                 }
3158                         } elseif ($attachment['filetype'] == 'image') {
3159                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3160                                         '$image' => [
3161                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3162                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3163                                                 'attachment' => $attachment,
3164                                         ],
3165                                 ]);
3166                                 // On Diaspora posts the attached pictures are leading
3167                                 if ($item['network'] == Protocol::DIASPORA) {
3168                                         $leading .= $media;
3169                                 } else {
3170                                         $trailing .= $media;
3171                                 }
3172                         }
3173                 }
3174
3175                 if ($shared) {
3176                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3177                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3178                 } else {
3179                         if ($leading != '') {
3180                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3181                         }
3182
3183                         if ($trailing != '') {
3184                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3185                         }
3186                 }
3187
3188                 DI::profiler()->stopRecording();
3189                 return $content;
3190         }
3191
3192         /**
3193          * Add link attachment to the content
3194          *
3195          * @param array  $attachments
3196          * @param string $body
3197          * @param string $content
3198          * @param bool   $shared
3199          * @param array  $ignore_links A list of URLs to ignore
3200          * @return string modified content
3201          */
3202         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3203         {
3204                 DI::profiler()->startRecording('rendering');
3205                 // Don't show a preview when there is a visual attachment (audio or video)
3206                 $types = array_column($attachments['visual'], 'type');
3207                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3208
3209                 if (!empty($attachments['link'])) {
3210                         foreach ($attachments['link'] as $link) {
3211                                 $found = false;
3212                                 foreach ($ignore_links as $ignore_link) {
3213                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3214                                                 $found = true;
3215                                         }
3216                                 }
3217                                 // @todo Judge between the links to use the one with most information
3218                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3219                                         (empty($attachment['name']) && !empty($link['name'])) ||
3220                                         (empty($attachment['description']) && !empty($link['description'])) ||
3221                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3222                                         $attachment = $link;
3223                                 }
3224                         }
3225                 }
3226
3227                 if (!empty($attachment)) {
3228                         $data = [
3229                                 'after' => '',
3230                                 'author_name' => $attachment['author-name'] ?? '',
3231                                 'author_url' =>  $attachment['author-url'] ?? '',
3232                                 'description' => $attachment['description'] ?? '',
3233                                 'image' => '',
3234                                 'preview' => '',
3235                                 'provider_name' => $attachment['publisher-name'] ?? '',
3236                                 'provider_url' => $attachment['publisher-url'] ?? '',
3237                                 'text' => '',
3238                                 'title' => $attachment['name'] ?? '',
3239                                 'type' => 'link',
3240                                 'url' => $attachment['url']];
3241
3242                         if ($preview && !empty($attachment['preview'])) {
3243                                 if ($attachment['preview-width'] >= 500) {
3244                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3245                                 } else {
3246                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3247                                 }
3248                         }
3249
3250                         if (!empty($data['description']) && !empty($content)) {
3251                                 similar_text($data['description'], $content, $percent);
3252                         } else {
3253                                 $percent = 0;
3254                         }
3255
3256                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3257                                 $data['description'] = '';
3258                         }
3259
3260                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3261                                 $data['author_name'] = '';
3262                         }
3263
3264                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3265                                 $data['author_url'] = '';
3266                         }
3267                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3268                         $data = BBCode::getAttachmentData($match[1]);
3269                 }
3270                 DI::profiler()->stopRecording();
3271
3272                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3273                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3274                                 $parts = parse_url($data['url']);
3275                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3276                                         if (empty($data['provider_name'])) {
3277                                                 $data['provider_name'] = $parts['host'];
3278                                         }
3279                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3280                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3281
3282                                                 if (!empty($parts['port'])) {
3283                                                         $data['provider_url'] .= ':' . $parts['port'];
3284                                                 }
3285                                         }
3286                                 }
3287
3288                                 // @todo Use a template
3289                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3290                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3291                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3292                                         '$url'  => $data['url'],
3293                                         '$title' => $data['title'],
3294                                 ]);
3295                         } else {
3296                                 return $content;
3297                         }
3298
3299                         if ($shared) {
3300                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3301                         } else {
3302                                 return $content . $rendered;
3303                         }
3304                 }
3305                 return $content;
3306         }
3307
3308         /**
3309          * Add non visual attachments to the content
3310          *
3311          * @param array $attachments
3312          * @param array $item
3313          * @param string $content
3314          * @return string modified content
3315          */
3316         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3317         {
3318                 DI::profiler()->startRecording('rendering');
3319                 $trailing = '';
3320                 foreach ($attachments['additional'] as $attachment) {
3321                         if (strpos($item['body'], $attachment['url'])) {
3322                                 continue;
3323                         }
3324
3325                         $author = ['uid' => 0, 'id' => $item['author-id'],
3326                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3327                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3328
3329                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3330
3331                         if (!empty($attachment['size'])) {
3332                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3333                         }
3334
3335                         /// @todo Use a template
3336                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3337                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3338                 }
3339
3340                 if ($trailing != '') {
3341                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3342                 }
3343
3344                 DI::profiler()->stopRecording();
3345                 return $content;
3346         }
3347
3348         private static function addQuestions(array $item, string $content): string
3349         {
3350                 DI::profiler()->startRecording('rendering');
3351                 if (!empty($item['question-id'])) {
3352                         $question = [
3353                                 'id'       => $item['question-id'],
3354                                 'multiple' => $item['question-multiple'],
3355                                 'voters'   => $item['question-voters'],
3356                                 'endtime'  => $item['question-end-time']
3357                         ];
3358
3359                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3360                         foreach ($options as $key => $option) {
3361                                 if ($question['voters'] > 0) {
3362                                         $percent = $option['replies'] / $question['voters'] * 100;
3363                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'], $option['name'], round($percent, 1));
3364                                 } else {
3365                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name'], );
3366                                 }
3367                         }
3368
3369                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3370                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3371                         } elseif (!empty($question['voters'])) {
3372                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3373                         } elseif (!empty($question['endtime'])) {
3374                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3375                         } else {
3376                                 $summary = '';
3377                         }
3378
3379                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3380                                 '$question' => $question,
3381                                 '$options'  => $options,
3382                                 '$summary'  => $summary,
3383                         ]);
3384         }
3385                 DI::profiler()->stopRecording();
3386                 return $content;
3387         }
3388
3389         /**
3390          * get private link for item
3391          *
3392          * @param array $item
3393          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3394          * @throws \Exception
3395          */
3396         public static function getPlink(array $item)
3397         {
3398                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3399                         $plink = $item['plink'];
3400                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3401                         $plink = $item['uri'];
3402                 }
3403
3404                 if (local_user()) {
3405                         $ret = [
3406                                 'href' => "display/" . $item['guid'],
3407                                 'orig' => "display/" . $item['guid'],
3408                                 'title' => DI::l10n()->t('View on separate page'),
3409                                 'orig_title' => DI::l10n()->t('View on separate page'),
3410                         ];
3411
3412                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3413                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3414                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3415                                 $plink = Contact::magicLinkByContact($author, $plink);
3416                         }
3417
3418                         if (!empty($plink)) {
3419                                 $ret['href'] = DI::baseUrl()->remove($plink);
3420                                 $ret['title'] = DI::l10n()->t('Link to source');
3421                         }
3422                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3423                         $ret = [
3424                                 'href' => $plink,
3425                                 'orig' => $plink,
3426                                 'title' => DI::l10n()->t('Link to source'),
3427                                 'orig_title' => DI::l10n()->t('Link to source'),
3428                         ];
3429                 } else {
3430                         $ret = [];
3431                 }
3432
3433                 return $ret;
3434         }
3435
3436         /**
3437          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3438          *
3439          * @param int $uri_id
3440          *
3441          * @return boolean "true" when it is a forum post
3442          */
3443         public static function isForumPost(int $uri_id): bool
3444         {
3445                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3446                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3447                                 return true;
3448                         }
3449                 }
3450                 return false;
3451         }
3452
3453         /**
3454          * Search item id for given URI or plink
3455          *
3456          * @param string $uri
3457          * @param integer $uid
3458          *
3459          * @return integer item id
3460          */
3461         public static function searchByLink(string $uri, int $uid = 0): int
3462         {
3463                 $ssl_uri = str_replace('http://', 'https://', $uri);
3464                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3465
3466                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3467                 if (DBA::isResult($item)) {
3468                         return $item['id'];
3469                 }
3470
3471                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3472                 if (DBA::isResult($item)) {
3473                         return $item['id'];
3474                 }
3475
3476                 return 0;
3477         }
3478
3479         /**
3480          * Return the URI for a link to the post
3481          *
3482          * @param string $uri URI or link to post
3483          *
3484          * @return string URI
3485          */
3486         public static function getURIByLink(string $uri): string
3487         {
3488                 $ssl_uri = str_replace('http://', 'https://', $uri);
3489                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3490
3491                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3492                 if (DBA::isResult($item)) {
3493                         return $item['uri'];
3494                 }
3495
3496                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3497                 if (DBA::isResult($item)) {
3498                         return $item['uri'];
3499                 }
3500
3501                 return '';
3502         }
3503
3504         /**
3505          * Fetches item for given URI or plink
3506          *
3507          * @param string $uri
3508          * @param integer $uid
3509          *
3510          * @return integer item id
3511          */
3512         public static function fetchByLink(string $uri, int $uid = 0): int
3513         {
3514                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3515                 $item_id = self::searchByLink($uri, $uid);
3516                 if (!empty($item_id)) {
3517                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3518                         return $item_id;
3519                 }
3520
3521                 $hookData = [
3522                         'uri'     => $uri,
3523                         'uid'     => $uid,
3524                         'item_id' => null,
3525                 ];
3526
3527                 Hook::callAll('item_by_link', $hookData);
3528
3529                 if (isset($hookData['item_id'])) {
3530                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3531                 }
3532
3533                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3534
3535                 if ($fetched_uri) {
3536                         $item_id = self::searchByLink($fetched_uri, $uid);
3537                 } else {
3538                         $item_id = Diaspora::fetchByURL($uri);
3539                 }
3540
3541                 if (!empty($item_id)) {
3542                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3543                         return $item_id;
3544                 }
3545
3546                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3547                 return 0;
3548         }
3549
3550         /**
3551          * Return share data from an item array (if the item is shared item)
3552          * We are providing the complete Item array, because at some time in the future
3553          * we hopefully will define these values not in the body anymore but in some item fields.
3554          * This function is meant to replace all similar functions in the system.
3555          *
3556          * @param array $item
3557          *
3558          * @return array with share information
3559          */
3560         public static function getShareArray(array $item): array
3561         {
3562                 return BBCode::fetchShareAttributes($item['body']);
3563         }
3564
3565         /**
3566          * Fetch item information for shared items from the original items and adds it.
3567          *
3568          * @param array $item
3569          *
3570          * @return array item array with data from the original item
3571          */
3572         public static function addShareDataFromOriginal(array $item): array
3573         {
3574                 $shared = self::getShareArray($item);
3575                 if (empty($shared)) {
3576                         return $item;
3577                 }
3578
3579                 // Real reshares always have got a GUID.
3580                 if (empty($shared['guid'])) {
3581                         return $item;
3582                 }
3583
3584                 $uid = $item['uid'] ?? 0;
3585
3586                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3587                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3588                 if (!DBA::isResult($shared_item)) {
3589                         if (empty($shared['link'])) {
3590                                 return $item;
3591                         }
3592
3593                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3594                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3595                         if (empty($id)) {
3596                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3597                                 return $item;
3598                         }
3599
3600                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3601                         if (!DBA::isResult($shared_item)) {
3602                                 return $item;
3603                         }
3604                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3605                 } else {
3606                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3607                 }
3608
3609                 if (!empty($shared_item['title'])) {
3610                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3611                         unset($shared_item['title']);
3612                 } else {
3613                         $body = $shared_item['body'];
3614                 }
3615
3616                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3617                 unset($shared_item['body']);
3618
3619                 return array_merge($item, $shared_item);
3620         }
3621
3622         /**
3623          * Check a prospective item array against user-level permissions
3624          *
3625          * @param array $item Expected keys: uri, gravity, and
3626          *                    author-link if is author-id is set,
3627          *                    owner-link if is owner-id is set,
3628          *                    causer-link if is causer-id is set.
3629          * @param int   $user_id Local user ID
3630          * @return bool
3631          * @throws \Exception
3632          */
3633         protected static function isAllowedByUser(array $item, int $user_id): bool
3634         {
3635                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3636                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3637                         return false;
3638                 }
3639
3640                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3641                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3642                         return false;
3643                 }
3644
3645                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3646                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3647                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3648                         return false;
3649                 }
3650
3651                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3652                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3653                         return false;
3654                 }
3655
3656                 return true;
3657         }
3658
3659         /**
3660          * Improve the data in shared posts
3661          *
3662          * @param array $item
3663          * @return string body
3664          */
3665         public static function improveSharedDataInBody(array $item): string
3666         {
3667                 $shared = BBCode::fetchShareAttributes($item['body']);
3668                 if (empty($shared['link'])) {
3669                         return $item['body'];
3670                 }
3671
3672                 $id = self::fetchByLink($shared['link']);
3673                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3674                 if (!$id) {
3675                         return $item['body'];
3676                 }
3677
3678                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3679                 if (!DBA::isResult($shared_item)) {
3680                         return $item['body'];
3681                 }
3682
3683                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3684
3685                 if (!empty($shared_item['title'])) {
3686                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3687                 }
3688
3689                 $shared_content .= $shared_item['body'];
3690
3691                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3692                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3693                 return $item['body'];
3694         }
3695 }