src/Model/Item.php

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