src/Model/Item.php

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