src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use dba;
  28 use Text_LanguageDetect;
  29
  30 require_once 'boot.php';
  31 require_once 'include/items.php';
  32 require_once 'include/text.php';
  33
  34 class Item extends BaseObject
  35 {
  36         /**
  37          * @brief Update existing item entries
  38          *
  39          * @param array $fields The fields that are to be changed
  40          * @param array $condition The condition for finding the item entries
  41          *
  42          * In the future we may have to change permissions as well.
  43          * Then we had to add the user id as third parameter.
  44          *
  45          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
  46          *
  47          * @return integer|boolean number of affected rows - or "false" if there was an error
  48          */
  49         public static function update(array $fields, array $condition)
  50         {
  51                 if (empty($condition) || empty($fields)) {
  52                         return false;
  53                 }
  54
  55                 // To ensure the data integrity we do it in an transaction
  56                 dba::transaction();
  57
  58                 // We cannot simply expand the condition to check for origin entries
  59                 // The condition needn't to be a simple array but could be a complex condition.
  60                 // And we have to execute this query before the update to ensure to fetch the same data.
  61                 $items = dba::select('item', ['id', 'origin'], $condition);
  62
  63                 $success = dba::update('item', $fields, $condition);
  64
  65                 if (!$success) {
  66                         dba::close($items);
  67                         dba::rollback();
  68                         return false;
  69                 }
  70
  71                 $rows = dba::affected_rows();
  72
  73                 while ($item = dba::fetch($items)) {
  74                         Term::insertFromTagFieldByItemId($item['id']);
  75                         Term::insertFromFileFieldByItemId($item['id']);
  76                         self::updateThread($item['id']);
  77
  78                         // We only need to notfiy others when it is an original entry from us
  79                         if ($item['origin']) {
  80                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
  81                         }
  82                 }
  83
  84                 dba::close($items);
  85                 dba::commit();
  86                 return $rows;
  87         }
  88
  89         /**
  90          * @brief Delete an item and notify others about it - if it was ours
  91          *
  92          * @param array $condition The condition for finding the item entries
  93          * @param integer $priority Priority for the notification
  94          */
  95         public static function delete($condition, $priority = PRIORITY_HIGH)
  96         {
  97                 $items = dba::select('item', ['id'], $condition);
  98                 while ($item = dba::fetch($items)) {
  99                         self::deleteById($item['id'], $priority);
 100                 }
 101                 dba::close($items);
 102         }
 103
 104         /**
 105          * @brief Delete an item and notify others about it - if it was ours
 106          *
 107          * @param integer $item_id Item ID that should be delete
 108          * @param integer $priority Priority for the notification
 109          *
 110          * @return boolean success
 111          */
 112         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
 113         {
 114                 // locate item to be deleted
 115                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 116                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 117                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 118                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 119                 if (!DBM::is_result($item)) {
 120                         logger('Item with ID ' . $item_id . " hadn't been found.", LOGGER_DEBUG);
 121                         return false;
 122                 }
 123
 124                 if ($item['deleted']) {
 125                         logger('Item with ID ' . $item_id . ' is already deleted.', LOGGER_DEBUG);
 126                         return false;
 127                 }
 128
 129                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 130                 if (!DBM::is_result($parent)) {
 131                         $parent = ['origin' => false];
 132                 }
 133
 134                 // clean up categories and tags so they don't end up as orphans
 135
 136                 $matches = false;
 137                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 138                 if ($cnt) {
 139                         foreach ($matches as $mtch) {
 140                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 141                         }
 142                 }
 143
 144                 $matches = false;
 145
 146                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 147                 if ($cnt) {
 148                         foreach ($matches as $mtch) {
 149                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 150                         }
 151                 }
 152
 153                 /*
 154                  * If item is a link to a photo resource, nuke all the associated photos
 155                  * (visitors will not have photo resources)
 156                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 157                  * generate a resource-id and therefore aren't intimately linked to the item.
 158                  */
 159                 if (strlen($item['resource-id'])) {
 160                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 161                 }
 162
 163                 // If item is a link to an event, delete the event.
 164                 if (intval($item['event-id'])) {
 165                         Event::delete($item['event-id']);
 166                 }
 167
 168                 // If item has attachments, drop them
 169                 foreach (explode(", ", $item['attach']) as $attach) {
 170                         preg_match("|attach/(\d+)|", $attach, $matches);
 171                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 172                 }
 173
 174                 // Delete tags that had been attached to other items
 175                 self::deleteTagsFromItem($item);
 176
 177                 // Set the item to "deleted"
 178                 dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
 179                                         'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 180                                 ['id' => $item['id']]);
 181
 182                 Term::insertFromTagFieldByItemId($item['id']);
 183                 Term::insertFromFileFieldByItemId($item['id']);
 184                 self::deleteThread($item['id'], $item['parent-uri']);
 185
 186                 if (!dba::exists('item', ["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 187                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 188                 }
 189
 190                 // If it's the parent of a comment thread, kill all the kids
 191                 if ($item['id'] == $item['parent']) {
 192                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 193                 }
 194
 195                 // Is it our comment and/or our thread?
 196                 if ($item['origin'] || $parent['origin']) {
 197
 198                         // When we delete the original post we will delete all existing copies on the server as well
 199                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 200
 201                         // send the notification upstream/downstream
 202                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 203                 }
 204
 205                 logger('Item with ID ' . $item_id . " had been deleted.", LOGGER_DEBUG);
 206
 207                 return true;
 208         }
 209
 210         private static function deleteTagsFromItem($item)
 211         {
 212                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 213                         return;
 214                 }
 215
 216                 $xo = XML::parseString($item["object"], false);
 217                 $xt = XML::parseString($item["target"], false);
 218
 219                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 220                         return;
 221                 }
 222
 223                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 224                 if (!DBM::is_result($i)) {
 225                         return;
 226                 }
 227
 228                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 229                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 230                 $author_copy = $item["origin"];
 231
 232                 if (($owner_remove && $author_copy) || !$owner_remove) {
 233                         return;
 234                 }
 235
 236                 $tags = explode(',', $i["tag"]);
 237                 $newtags = [];
 238                 if (count($tags)) {
 239                         foreach ($tags as $tag) {
 240                                 if (trim($tag) !== trim($xo->body)) {
 241                                        $newtags[] = trim($tag);
 242                                 }
 243                         }
 244                 }
 245                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 246         }
 247
 248         private static function guid($item, $notify)
 249         {
 250                 $guid = notags(trim($item['guid']));
 251
 252                 if (!empty($guid)) {
 253                         return $guid;
 254                 }
 255
 256                 if ($notify) {
 257                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 258                         // We add the hash of our own host because our host is the original creator of the post.
 259                         $prefix_host = get_app()->get_hostname();
 260                 } else {
 261                         $prefix_host = '';
 262
 263                         // We are only storing the post so we create a GUID from the original hostname.
 264                         if (!empty($item['author-link'])) {
 265                                 $parsed = parse_url($item['author-link']);
 266                                 if (!empty($parsed['host'])) {
 267                                         $prefix_host = $parsed['host'];
 268                                 }
 269                         }
 270
 271                         if (empty($prefix_host) && !empty($item['plink'])) {
 272                                 $parsed = parse_url($item['plink']);
 273                                 if (!empty($parsed['host'])) {
 274                                         $prefix_host = $parsed['host'];
 275                                 }
 276                         }
 277
 278                         if (empty($prefix_host) && !empty($item['uri'])) {
 279                                 $parsed = parse_url($item['uri']);
 280                                 if (!empty($parsed['host'])) {
 281                                         $prefix_host = $parsed['host'];
 282                                 }
 283                         }
 284
 285                         // Is it in the format data@host.tld? - Used for mail contacts
 286                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 287                                 $mailparts = explode('@', $item['author-link']);
 288                                 $prefix_host = array_pop($mailparts);
 289                         }
 290                 }
 291
 292                 if (!empty($item['plink'])) {
 293                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 294                 } elseif (!empty($item['uri'])) {
 295                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 296                 } else {
 297                         $guid = get_guid(32, hash('crc32', $prefix_host));
 298                 }
 299
 300                 return $guid;
 301         }
 302
 303         private static function contactId($item)
 304         {
 305                 $contact_id = (int)$item["contact-id"];
 306
 307                 if (!empty($contact_id)) {
 308                         return $contact_id;
 309                 }
 310                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 311                 /*
 312                  * First we are looking for a suitable contact that matches with the author of the post
 313                  * This is done only for comments
 314                  */
 315                 if ($item['parent-uri'] != $item['uri']) {
 316                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 317                 }
 318
 319                 // If not present then maybe the owner was found
 320                 if ($contact_id == 0) {
 321                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 322                 }
 323
 324                 // Still missing? Then use the "self" contact of the current user
 325                 if ($contact_id == 0) {
 326                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 327                         if (DBM::is_result($self)) {
 328                                 $contact_id = $self["id"];
 329                         }
 330                 }
 331                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 332
 333                 return $contact_id;
 334         }
 335
 336         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 337         {
 338                 $a = get_app();
 339
 340                 // If it is a posting where users should get notifications, then define it as wall posting
 341                 if ($notify) {
 342                         $item['wall'] = 1;
 343                         $item['type'] = 'wall';
 344                         $item['origin'] = 1;
 345                         $item['network'] = NETWORK_DFRN;
 346                         $item['protocol'] = PROTOCOL_DFRN;
 347                 } else {
 348                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 349                 }
 350
 351                 $item['guid'] = self::guid($item, $notify);
 352                 $item['uri'] = notags(trim(defaults($item, 'uri', item_new_uri($a->get_hostname(), $item['uid'], $item['guid']))));
 353
 354                 // Store conversation data
 355                 $item = Conversation::insert($item);
 356
 357                 /*
 358                  * If a Diaspora signature structure was passed in, pull it out of the
 359                  * item array and set it aside for later storage.
 360                  */
 361
 362                 $dsprsig = null;
 363                 if (x($item, 'dsprsig')) {
 364                         $encoded_signature = $item['dsprsig'];
 365                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 366                         unset($item['dsprsig']);
 367                 }
 368
 369                 if (!empty($item['diaspora_signed_text'])) {
 370                         $diaspora_signed_text = $item['diaspora_signed_text'];
 371                         unset($item['diaspora_signed_text']);
 372                 } else {
 373                         $diaspora_signed_text = '';
 374                 }
 375
 376                 // Converting the plink
 377                 /// @TODO Check if this is really still needed
 378                 if ($item['network'] == NETWORK_OSTATUS) {
 379                         if (isset($item['plink'])) {
 380                                 $item['plink'] = OStatus::convertHref($item['plink']);
 381                         } elseif (isset($item['uri'])) {
 382                                 $item['plink'] = OStatus::convertHref($item['uri']);
 383                         }
 384                 }
 385
 386                 if (!empty($item['thr-parent'])) {
 387                         $item['parent-uri'] = $item['thr-parent'];
 388                 }
 389
 390                 if (x($item, 'gravity')) {
 391                         $item['gravity'] = intval($item['gravity']);
 392                 } elseif ($item['parent-uri'] === $item['uri']) {
 393                         $item['gravity'] = 0;
 394                 } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
 395                         $item['gravity'] = 6;
 396                 } else {
 397                         $item['gravity'] = 6;   // extensible catchall
 398                 }
 399
 400                 $item['type'] = defaults($item, 'type', 'remote');
 401
 402                 $uid = intval($item['uid']);
 403
 404                 // check for create date and expire time
 405                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 406
 407                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 408                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 409                         $expire_interval = $user['expire'];
 410                 }
 411
 412                 if (($expire_interval > 0) && !empty($item['created'])) {
 413                         $expire_date = time() - ($expire_interval * 86400);
 414                         $created_date = strtotime($item['created']);
 415                         if ($created_date < $expire_date) {
 416                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
 417                                 return 0;
 418                         }
 419                 }
 420
 421                 /*
 422                  * Do we already have this item?
 423                  * We have to check several networks since Friendica posts could be repeated
 424                  * via OStatus (maybe Diasporsa as well)
 425                  */
 426                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
 427                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
 428                                 trim($item['uri']), $item['uid'],
 429                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
 430                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
 431                         if (DBM::is_result($existing)) {
 432                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 433                                 if ($uid != 0) {
 434                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
 435                                 }
 436
 437                                 return $existing["id"];
 438                         }
 439                 }
 440
 441                 self::addLanguageInPostopts($item);
 442
 443                 $item['wall']          = intval(defaults($item, 'wall', 0));
 444                 $item['extid']         = trim(defaults($item, 'extid', ''));
 445                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
 446                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
 447                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
 448                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
 449                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
 450                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
 451                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
 452                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
 453                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
 454                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
 455                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 456                 $item['title']         = trim(defaults($item, 'title', ''));
 457                 $item['location']      = trim(defaults($item, 'location', ''));
 458                 $item['coord']         = trim(defaults($item, 'coord', ''));
 459                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
 460                 $item['deleted']       = 0;
 461                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
 462                 $item['verb']          = trim(defaults($item, 'verb', ''));
 463                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
 464                 $item['object']        = trim(defaults($item, 'object', ''));
 465                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
 466                 $item['target']        = trim(defaults($item, 'target', ''));
 467                 $item['plink']         = trim(defaults($item, 'plink', ''));
 468                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
 469                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
 470                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
 471                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
 472                 $item['private']       = intval(defaults($item, 'private', 0));
 473                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
 474                 $item['body']          = trim(defaults($item, 'body', ''));
 475                 $item['tag']           = trim(defaults($item, 'tag', ''));
 476                 $item['attach']        = trim(defaults($item, 'attach', ''));
 477                 $item['app']           = trim(defaults($item, 'app', ''));
 478                 $item['origin']        = intval(defaults($item, 'origin', 0));
 479                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
 480                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
 481                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
 482                 $item['inform']        = trim(defaults($item, 'inform', ''));
 483                 $item['file']          = trim(defaults($item, 'file', ''));
 484
 485                 // When there is no content then we don't post it
 486                 if ($item['body'].$item['title'] == '') {
 487                         return 0;
 488                 }
 489
 490                 // Items cannot be stored before they happen ...
 491                 if ($item['created'] > DateTimeFormat::utcNow()) {
 492                         $item['created'] = DateTimeFormat::utcNow();
 493                 }
 494
 495                 // We haven't invented time travel by now.
 496                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 497                         $item['edited'] = DateTimeFormat::utcNow();
 498                 }
 499
 500                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
 501                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
 502                 }
 503
 504                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
 505
 506                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 507                 $item["contact-id"] = self::contactId($item);
 508
 509                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 510                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 511
 512                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
 513
 514                 if (Contact::isBlocked($item["author-id"])) {
 515                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
 516                         return 0;
 517                 }
 518
 519                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 520                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 521
 522                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
 523
 524                 if (Contact::isBlocked($item["owner-id"])) {
 525                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
 526                         return 0;
 527                 }
 528
 529                 if ($item['network'] == NETWORK_PHANTOM) {
 530                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
 531
 532                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
 533                         if (!empty($contact['network'])) {
 534                                 $item['network'] = $contact["network"];
 535                         } else {
 536                                 $item['network'] = NETWORK_DFRN;
 537                         }
 538                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
 539                 }
 540
 541                 // Checking if there is already an item with the same guid
 542                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
 543                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 544                 if (dba::exists('item', $condition)) {
 545                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
 546                         return 0;
 547                 }
 548
 549                 // Check for hashtags in the body and repair or add hashtag links
 550                 self::setHashtags($item);
 551
 552                 $item['thr-parent'] = $item['parent-uri'];
 553
 554                 $notify_type = '';
 555                 $allow_cid = '';
 556                 $allow_gid = '';
 557                 $deny_cid  = '';
 558                 $deny_gid  = '';
 559
 560                 if ($item['parent-uri'] === $item['uri']) {
 561                         $parent_id = 0;
 562                         $parent_deleted = 0;
 563                         $allow_cid = $item['allow_cid'];
 564                         $allow_gid = $item['allow_gid'];
 565                         $deny_cid  = $item['deny_cid'];
 566                         $deny_gid  = $item['deny_gid'];
 567                         $notify_type = 'wall-new';
 568                 } else {
 569                         // find the parent and snarf the item id and ACLs
 570                         // and anything else we need to inherit
 571
 572                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
 573                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 574                                 'wall', 'private', 'forum_mode', 'origin'];
 575                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
 576                         $params = ['order' => ['id' => false]];
 577                         $parent = dba::selectFirst('item', $fields, $condition, $params);
 578
 579                         if (DBM::is_result($parent)) {
 580                                 // is the new message multi-level threaded?
 581                                 // even though we don't support it now, preserve the info
 582                                 // and re-attach to the conversation parent.
 583
 584                                 if ($parent['uri'] != $parent['parent-uri']) {
 585                                         $item['parent-uri'] = $parent['parent-uri'];
 586
 587                                         $condition = ['uri' => $item['parent-uri'],
 588                                                 'parent-uri' => $item['parent-uri'],
 589                                                 'uid' => $item['uid']];
 590                                         $params = ['order' => ['id' => false]];
 591                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
 592
 593                                         if (DBM::is_result($toplevel_parent)) {
 594                                                 $parent = $toplevel_parent;
 595                                         }
 596                                 }
 597
 598                                 $parent_id      = $parent['id'];
 599                                 $parent_deleted = $parent['deleted'];
 600                                 $allow_cid      = $parent['allow_cid'];
 601                                 $allow_gid      = $parent['allow_gid'];
 602                                 $deny_cid       = $parent['deny_cid'];
 603                                 $deny_gid       = $parent['deny_gid'];
 604                                 $item['wall']    = $parent['wall'];
 605                                 $notify_type    = 'comment-new';
 606
 607                                 /*
 608                                  * If the parent is private, force privacy for the entire conversation
 609                                  * This differs from the above settings as it subtly allows comments from
 610                                  * email correspondents to be private even if the overall thread is not.
 611                                  */
 612                                 if ($parent['private']) {
 613                                         $item['private'] = $parent['private'];
 614                                 }
 615
 616                                 /*
 617                                  * Edge case. We host a public forum that was originally posted to privately.
 618                                  * The original author commented, but as this is a comment, the permissions
 619                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
 620                                  */
 621                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
 622                                         $item['private'] = 0;
 623                                 }
 624
 625                                 // If its a post from myself then tag the thread as "mention"
 626                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
 627                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
 628                                 if (DBM::is_result($user)) {
 629                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
 630                                         logger("'myself' is ".$self." for parent ".$parent_id." checking against ".$item['author-link']." and ".$item['owner-link'], LOGGER_DEBUG);
 631                                         if ((normalise_link($item['author-link']) == $self) || (normalise_link($item['owner-link']) == $self)) {
 632                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
 633                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
 634                                         }
 635                                 }
 636                         } else {
 637                                 /*
 638                                  * Allow one to see reply tweets from status.net even when
 639                                  * we don't have or can't see the original post.
 640                                  */
 641                                 if ($force_parent) {
 642                                         logger('$force_parent=true, reply converted to top-level post.');
 643                                         $parent_id = 0;
 644                                         $item['parent-uri'] = $item['uri'];
 645                                         $item['gravity'] = 0;
 646                                 } else {
 647                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
 648                                         return 0;
 649                                 }
 650
 651                                 $parent_deleted = 0;
 652                         }
 653                 }
 654
 655                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
 656                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
 657                 if (dba::exists('item', $condition)) {
 658                         logger('duplicated item with the same uri found. '.print_r($item,true));
 659                         return 0;
 660                 }
 661
 662                 // On Friendica and Diaspora the GUID is unique
 663                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
 664                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 665                         if (dba::exists('item', $condition)) {
 666                                 logger('duplicated item with the same guid found. '.print_r($item,true));
 667                                 return 0;
 668                         }
 669                 } else {
 670                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 671                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 672                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 673                         if (dba::exists('item', $condition)) {
 674                                 logger('duplicated item with the same body found. '.print_r($item,true));
 675                                 return 0;
 676                         }
 677                 }
 678
 679                 // Is this item available in the global items (with uid=0)?
 680                 if ($item["uid"] == 0) {
 681                         $item["global"] = true;
 682
 683                         // Set the global flag on all items if this was a global item entry
 684                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
 685                 } else {
 686                         $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
 687                 }
 688
 689                 // ACL settings
 690                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
 691                         $private = 1;
 692                 } else {
 693                         $private = $item['private'];
 694                 }
 695
 696                 $item["allow_cid"] = $allow_cid;
 697                 $item["allow_gid"] = $allow_gid;
 698                 $item["deny_cid"] = $deny_cid;
 699                 $item["deny_gid"] = $deny_gid;
 700                 $item["private"] = $private;
 701                 $item["deleted"] = $parent_deleted;
 702
 703                 // Fill the cache field
 704                 put_item_in_cache($item);
 705
 706                 if ($notify) {
 707                         Addon::callHooks('post_local', $item);
 708                 } else {
 709                         Addon::callHooks('post_remote', $item);
 710                 }
 711
 712                 // This array field is used to trigger some automatic reactions
 713                 // It is mainly used in the "post_local" hook.
 714                 unset($item['api_source']);
 715
 716                 if (x($item, 'cancel')) {
 717                         logger('post cancelled by addon.');
 718                         return 0;
 719                 }
 720
 721                 /*
 722                  * Check for already added items.
 723                  * There is a timing issue here that sometimes creates double postings.
 724                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 725                  */
 726                 if ($item["uid"] == 0) {
 727                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
 728                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
 729                                 return 0;
 730                         }
 731                 }
 732
 733                 logger('' . print_r($item,true), LOGGER_DATA);
 734
 735                 dba::transaction();
 736                 $ret = dba::insert('item', $item);
 737
 738                 // When the item was successfully stored we fetch the ID of the item.
 739                 if (DBM::is_result($ret)) {
 740                         $current_post = dba::lastInsertId();
 741                 } else {
 742                         // This can happen - for example - if there are locking timeouts.
 743                         dba::rollback();
 744
 745                         // Store the data into a spool file so that we can try again later.
 746
 747                         // At first we restore the Diaspora signature that we removed above.
 748                         if (isset($encoded_signature)) {
 749                                 $item['dsprsig'] = $encoded_signature;
 750                         }
 751
 752                         // Now we store the data in the spool directory
 753                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 754                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
 755
 756                         $spoolpath = get_spoolpath();
 757                         if ($spoolpath != "") {
 758                                 $spool = $spoolpath.'/'.$file;
 759                                 file_put_contents($spool, json_encode($item));
 760                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
 761                         }
 762                         return 0;
 763                 }
 764
 765                 if ($current_post == 0) {
 766                         // This is one of these error messages that never should occur.
 767                         logger("couldn't find created item - we better quit now.");
 768                         dba::rollback();
 769                         return 0;
 770                 }
 771
 772                 // How much entries have we created?
 773                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
 774                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
 775
 776                 if ($entries > 1) {
 777                         // There are duplicates. We delete our just created entry.
 778                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
 779
 780                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
 781                         dba::delete('item', ['id' => $current_post]);
 782                         dba::commit();
 783                         return 0;
 784                 } elseif ($entries == 0) {
 785                         // This really should never happen since we quit earlier if there were problems.
 786                         logger("Something is terribly wrong. We haven't found our created entry.");
 787                         dba::rollback();
 788                         return 0;
 789                 }
 790
 791                 logger('created item '.$current_post);
 792                 self::updateContact($item);
 793
 794                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
 795                         $parent_id = $current_post;
 796                 }
 797
 798                 // Set parent id
 799                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
 800
 801                 $item['id'] = $current_post;
 802                 $item['parent'] = $parent_id;
 803
 804                 // update the commented timestamp on the parent
 805                 // Only update "commented" if it is really a comment
 806                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
 807                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 808                 } else {
 809                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 810                 }
 811
 812                 if ($dsprsig) {
 813                         /*
 814                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
 815                          * We can check for this condition when we decode and encode the stuff again.
 816                          */
 817                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
 818                                 $dsprsig->signature = base64_decode($dsprsig->signature);
 819                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
 820                         }
 821
 822                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
 823                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
 824                 }
 825
 826                 if (!empty($diaspora_signed_text)) {
 827                         // Formerly we stored the signed text, the signature and the author in different fields.
 828                         // We now store the raw data so that we are more flexible.
 829                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
 830                 }
 831
 832                 $deleted = self::tagDeliver($item['uid'], $current_post);
 833
 834                 /*
 835                  * current post can be deleted if is for a community page and no mention are
 836                  * in it.
 837                  */
 838                 if (!$deleted && !$dontcache) {
 839                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
 840                         if (DBM::is_result($posted_item)) {
 841                                 if ($notify) {
 842                                         Addon::callHooks('post_local_end', $posted_item);
 843                                 } else {
 844                                         Addon::callHooks('post_remote_end', $posted_item);
 845                                 }
 846                         } else {
 847                                 logger('new item not found in DB, id ' . $current_post);
 848                         }
 849                 }
 850
 851                 if ($item['parent-uri'] === $item['uri']) {
 852                         self::addThread($current_post);
 853                 } else {
 854                         self::updateThread($parent_id);
 855                 }
 856
 857                 dba::commit();
 858
 859                 /*
 860                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
 861                  * This is not perfect - but a workable solution until we found the reason for the problem.
 862                  */
 863                 Term::insertFromTagFieldByItemId($current_post);
 864                 Term::insertFromFileFieldByItemId($current_post);
 865
 866                 if ($item['parent-uri'] === $item['uri']) {
 867                         self::addShadow($current_post);
 868                 } else {
 869                         self::addShadowPost($current_post);
 870                 }
 871
 872                 check_user_notification($current_post);
 873
 874                 if ($notify) {
 875                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
 876                 } elseif (!empty($parent) && $parent['origin']) {
 877                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
 878                 }
 879
 880                 return $current_post;
 881         }
 882
 883         /**
 884          * @brief Distributes public items to the receivers
 885          *
 886          * @param integer $itemid      Item ID that should be added
 887          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
 888          */
 889         public static function distribute($itemid, $signed_text = '')
 890         {
 891                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
 892                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
 893                 if (!DBM::is_result($parent)) {
 894                         return;
 895                 }
 896
 897                 // Only distribute public items from native networks
 898                 $condition = ['id' => $itemid, 'uid' => 0,
 899                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
 900                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
 901                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
 902                 if (!DBM::is_result($item)) {
 903                         return;
 904                 }
 905
 906                 unset($item['id']);
 907                 unset($item['parent']);
 908                 unset($item['mention']);
 909                 unset($item['wall']);
 910                 unset($item['origin']);
 911                 unset($item['starred']);
 912                 unset($item['rendered-hash']);
 913                 unset($item['rendered-html']);
 914
 915                 $users = [];
 916
 917                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
 918                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
 919                 $contacts = dba::select('contact', ['uid'], $condition);
 920                 while ($contact = dba::fetch($contacts)) {
 921                         $users[$contact['uid']] = $contact['uid'];
 922                 }
 923
 924                 $origin_uid = 0;
 925
 926                 if ($item['uri'] != $item['parent-uri']) {
 927                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
 928                         while ($parent = dba::fetch($parents)) {
 929                                 $users[$parent['uid']] = $parent['uid'];
 930                                 if ($parent['origin'] && !$item['origin']) {
 931                                         $origin_uid = $parent['uid'];
 932                                 }
 933                         }
 934                 }
 935
 936                 foreach ($users as $uid) {
 937                         if ($origin_uid == $uid) {
 938                                 $item['diaspora_signed_text'] = $signed_text;
 939                         }
 940                         self::storeForUser($itemid, $item, $uid);
 941                 }
 942         }
 943
 944         /**
 945          * @brief Store public items for the receivers
 946          *
 947          * @param integer $itemid Item ID that should be added
 948          * @param array   $item   The item entry that will be stored
 949          * @param integer $uid    The user that will receive the item entry
 950          */
 951         private static function storeForUser($itemid, $item, $uid)
 952         {
 953                 $item['uid'] = $uid;
 954                 $item['origin'] = 0;
 955                 $item['wall'] = 0;
 956                 if ($item['uri'] == $item['parent-uri']) {
 957                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
 958                 } else {
 959                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
 960                 }
 961
 962                 if (empty($item['contact-id'])) {
 963                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
 964                         if (!DBM::is_result($self)) {
 965                                 return;
 966                         }
 967                         $item['contact-id'] = $self['id'];
 968                 }
 969
 970                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
 971                         $item['type'] = 'remote-comment';
 972                 } elseif ($item['type'] == 'wall') {
 973                         $item['type'] = 'remote';
 974                 }
 975
 976                 /// @todo Handling of "event-id"
 977
 978                 $notify = false;
 979                 if ($item['uri'] == $item['parent-uri']) {
 980                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
 981                         if (DBM::is_result($contact)) {
 982                                 $notify = self::isRemoteSelf($contact, $item);
 983                         }
 984                 }
 985
 986                 $distributed = self::insert($item, false, $notify, true);
 987
 988                 if (!$distributed) {
 989                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
 990                 } else {
 991                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
 992                 }
 993         }
 994
 995         /**
 996          * @brief Add a shadow entry for a given item id that is a thread starter
 997          *
 998          * We store every public item entry additionally with the user id "0".
 999          * This is used for the community page and for the search.
1000          * It is planned that in the future we will store public item entries only once.
1001          *
1002          * @param integer $itemid Item ID that should be added
1003          */
1004         public static function addShadow($itemid)
1005         {
1006                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1007                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1008                 $item = dba::selectFirst('item', $fields, $condition);
1009
1010                 if (!DBM::is_result($item)) {
1011                         return;
1012                 }
1013
1014                 // is it already a copy?
1015                 if (($itemid == 0) || ($item['uid'] == 0)) {
1016                         return;
1017                 }
1018
1019                 // Is it a visible public post?
1020                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1021                         return;
1022                 }
1023
1024                 // is it an entry from a connector? Only add an entry for natively connected networks
1025                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1026                         return;
1027                 }
1028
1029                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1030
1031                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1032                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1033
1034                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1035                                 // Preparing public shadow (removing user specific data)
1036                                 $item['uid'] = 0;
1037                                 unset($item['id']);
1038                                 unset($item['parent']);
1039                                 unset($item['wall']);
1040                                 unset($item['mention']);
1041                                 unset($item['origin']);
1042                                 unset($item['starred']);
1043                                 unset($item['rendered-hash']);
1044                                 unset($item['rendered-html']);
1045                                 if ($item['uri'] == $item['parent-uri']) {
1046                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1047                                 } else {
1048                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1049                                 }
1050
1051                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1052                                         $item['type'] = 'remote-comment';
1053                                 } elseif ($item['type'] == 'wall') {
1054                                         $item['type'] = 'remote';
1055                                 }
1056
1057                                 $public_shadow = self::insert($item, false, false, true);
1058
1059                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1060                         }
1061                 }
1062         }
1063
1064         /**
1065          * @brief Add a shadow entry for a given item id that is a comment
1066          *
1067          * This function does the same like the function above - but for comments
1068          *
1069          * @param integer $itemid Item ID that should be added
1070          */
1071         public static function addShadowPost($itemid)
1072         {
1073                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1074                 if (!DBM::is_result($item)) {
1075                         return;
1076                 }
1077
1078                 // Is it a toplevel post?
1079                 if ($item['id'] == $item['parent']) {
1080                         self::addShadow($itemid);
1081                         return;
1082                 }
1083
1084                 // Is this a shadow entry?
1085                 if ($item['uid'] == 0)
1086                         return;
1087
1088                 // Is there a shadow parent?
1089                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1090                         return;
1091                 }
1092
1093                 // Is there already a shadow entry?
1094                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1095                         return;
1096                 }
1097
1098                 // Save "origin" and "parent" state
1099                 $origin = $item['origin'];
1100                 $parent = $item['parent'];
1101
1102                 // Preparing public shadow (removing user specific data)
1103                 $item['uid'] = 0;
1104                 unset($item['id']);
1105                 unset($item['parent']);
1106                 unset($item['wall']);
1107                 unset($item['mention']);
1108                 unset($item['origin']);
1109                 unset($item['starred']);
1110                 unset($item['rendered-hash']);
1111                 unset($item['rendered-html']);
1112                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1113
1114                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1115                         $item['type'] = 'remote-comment';
1116                 } elseif ($item['type'] == 'wall') {
1117                         $item['type'] = 'remote';
1118                 }
1119
1120                 $public_shadow = self::insert($item, false, false, true);
1121
1122                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1123
1124                 // If this was a comment to a Diaspora post we don't get our comment back.
1125                 // This means that we have to distribute the comment by ourselves.
1126                 if ($origin) {
1127                         if (dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1128                                 self::distribute($public_shadow);
1129                         }
1130                 }
1131         }
1132
1133          /**
1134          * Adds a "lang" specification in a "postopts" element of given $arr,
1135          * if possible and not already present.
1136          * Expects "body" element to exist in $arr.
1137          */
1138         private static function addLanguageInPostopts(&$item)
1139         {
1140                 if (!empty($item['postopts'])) {
1141                         if (strstr($item['postopts'], 'lang=')) {
1142                                 // do not override
1143                                 return;
1144                         }
1145                         $postopts = $item['postopts'];
1146                 } else {
1147                         $postopts = "";
1148                 }
1149
1150                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1151
1152                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1153
1154                 if (sizeof($languages) > 0) {
1155                         if ($postopts != '') {
1156                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1157                         }
1158
1159                         $postopts .= 'lang=';
1160                         $sep = "";
1161
1162                         foreach ($languages as $language => $score) {
1163                                 $postopts .= $sep . $language . ";" . $score;
1164                                 $sep = ':';
1165                         }
1166                         $item['postopts'] = $postopts;
1167                 }
1168         }
1169
1170         /**
1171          * @brief Creates an unique guid out of a given uri
1172          *
1173          * @param string $uri uri of an item entry
1174          * @param string $host hostname for the GUID prefix
1175          * @return string unique guid
1176          */
1177         public static function guidFromUri($uri, $host)
1178         {
1179                 // Our regular guid routine is using this kind of prefix as well
1180                 // We have to avoid that different routines could accidentally create the same value
1181                 $parsed = parse_url($uri);
1182
1183                 // We use a hash of the hostname as prefix for the guid
1184                 $guid_prefix = hash("crc32", $host);
1185
1186                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1187                 unset($parsed["scheme"]);
1188
1189                 // Glue it together to be able to make a hash from it
1190                 $host_id = implode("/", $parsed);
1191
1192                 // We could use any hash algorithm since it isn't a security issue
1193                 $host_hash = hash("ripemd128", $host_id);
1194
1195                 return $guid_prefix.$host_hash;
1196         }
1197
1198         /**
1199          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1200          *
1201          * This can be used to filter for inactive contacts.
1202          * Only do this for public postings to avoid privacy problems, since poco data is public.
1203          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1204          *
1205          * @param array $arr Contains the just posted item record
1206          */
1207         private static function updateContact($arr)
1208         {
1209                 // Unarchive the author
1210                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1211                 if (DBM::is_result($contact)) {
1212                         Contact::unmarkForArchival($contact);
1213                 }
1214
1215                 // Unarchive the contact if it's not our own contact
1216                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1217                 if (DBM::is_result($contact)) {
1218                         Contact::unmarkForArchival($contact);
1219                 }
1220
1221                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1222
1223                 // Is it a forum? Then we don't care about the rules from above
1224                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1225                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1226                                 $update = true;
1227                         }
1228                 }
1229
1230                 if ($update) {
1231                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1232                                 ['id' => $arr['contact-id']]);
1233                 }
1234                 // Now do the same for the system wide contacts with uid=0
1235                 if (!$arr['private']) {
1236                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1237                                 ['id' => $arr['owner-id']]);
1238
1239                         if ($arr['owner-id'] != $arr['author-id']) {
1240                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1241                                         ['id' => $arr['author-id']]);
1242                         }
1243                 }
1244         }
1245
1246         private static function setHashtags(&$item)
1247         {
1248
1249                 $tags = get_tags($item["body"]);
1250
1251                 // No hashtags?
1252                 if (!count($tags)) {
1253                         return false;
1254                 }
1255
1256                 // This sorting is important when there are hashtags that are part of other hashtags
1257                 // Otherwise there could be problems with hashtags like #test and #test2
1258                 rsort($tags);
1259
1260                 $URLSearchString = "^\[\]";
1261
1262                 // All hashtags should point to the home server if "local_tags" is activated
1263                 if (Config::get('system', 'local_tags')) {
1264                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1265                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1266
1267                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1268                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1269                 }
1270
1271                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1272                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1273                         function ($match) {
1274                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1275                         }, $item["body"]);
1276
1277                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1278                         function ($match) {
1279                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1280                         }, $item["body"]);
1281
1282                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1283                         function ($match) {
1284                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1285                         }, $item["body"]);
1286
1287                 // Repair recursive urls
1288                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1289                                 "&num;$2", $item["body"]);
1290
1291                 foreach ($tags as $tag) {
1292                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1293                                 continue;
1294                         }
1295
1296                         $basetag = str_replace('_',' ',substr($tag,1));
1297
1298                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1299
1300                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1301
1302                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1303                                 if (strlen($item["tag"])) {
1304                                         $item["tag"] = ','.$item["tag"];
1305                                 }
1306                                 $item["tag"] = $newtag.$item["tag"];
1307                         }
1308                 }
1309
1310                 // Convert back the masked hashtags
1311                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1312         }
1313
1314         public static function getGuidById($id)
1315         {
1316                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1317                 if (DBM::is_result($item)) {
1318                         return $item['guid'];
1319                 } else {
1320                         return '';
1321                 }
1322         }
1323
1324         public static function getIdAndNickByGuid($guid, $uid = 0)
1325         {
1326                 $nick = "";
1327                 $id = 0;
1328
1329                 if ($uid == 0) {
1330                         $uid == local_user();
1331                 }
1332
1333                 // Does the given user have this item?
1334                 if ($uid) {
1335                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1336                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1337                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1338                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1339                         if (DBM::is_result($item)) {
1340                                 $id = $item["id"];
1341                                 $nick = $item["nickname"];
1342                         }
1343                 }
1344
1345                 // Or is it anywhere on the server?
1346                 if ($nick == "") {
1347                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1348                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1349                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1350                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1351                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1352                                         AND NOT `item`.`private` AND `item`.`wall`
1353                                         AND `item`.`guid` = ?", $guid);
1354                         if (DBM::is_result($item)) {
1355                                 $id = $item["id"];
1356                                 $nick = $item["nickname"];
1357                         }
1358                 }
1359                 return ["nick" => $nick, "id" => $id];
1360         }
1361
1362         /**
1363          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1364          * @param int $uid
1365          * @param int $item_id
1366          * @return bool true if item was deleted, else false
1367          */
1368         private static function tagDeliver($uid, $item_id)
1369         {
1370                 $mention = false;
1371
1372                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1373                 if (!DBM::is_result($user)) {
1374                         return;
1375                 }
1376
1377                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1378                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1379
1380                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1381                 if (!DBM::is_result($item)) {
1382                         return;
1383                 }
1384
1385                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1386
1387                 /*
1388                  * Diaspora uses their own hardwired link URL in @-tags
1389                  * instead of the one we supply with webfinger
1390                  */
1391                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1392
1393                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1394                 if ($cnt) {
1395                         foreach ($matches as $mtch) {
1396                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1397                                         $mention = true;
1398                                         logger('mention found: ' . $mtch[2]);
1399                                 }
1400                         }
1401                 }
1402
1403                 if (!$mention) {
1404                         if (($community_page || $prvgroup) &&
1405                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1406                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1407                                 // delete it!
1408                                 logger("no-mention top-level post to community or private group. delete.");
1409                                 dba::delete('item', ['id' => $item_id]);
1410                                 return true;
1411                         }
1412                         return;
1413                 }
1414
1415                 $arr = ['item' => $item, 'user' => $user];
1416
1417                 Addon::callHooks('tagged', $arr);
1418
1419                 if (!$community_page && !$prvgroup) {
1420                         return;
1421                 }
1422
1423                 /*
1424                  * tgroup delivery - setup a second delivery chain
1425                  * prevent delivery looping - only proceed
1426                  * if the message originated elsewhere and is a top-level post
1427                  */
1428                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1429                         return;
1430                 }
1431
1432                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1433                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1434                 if (!DBM::is_result($self)) {
1435                         return;
1436                 }
1437
1438                 $owner_id = Contact::getIdForURL($self['url']);
1439
1440                 // also reset all the privacy bits to the forum default permissions
1441
1442                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1443
1444                 $forum_mode = ($prvgroup ? 2 : 1);
1445
1446                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1447                         'owner-id' => $owner_id, 'owner-name' => $self['name'], 'owner-link' => $self['url'],
1448                         'owner-avatar' => $self['thumb'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1449                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1450                 dba::update('item', $fields, ['id' => $item_id]);
1451
1452                 self::updateThread($item_id);
1453
1454                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
1455         }
1456
1457         public static function isRemoteSelf($contact, &$datarray)
1458         {
1459                 $a = get_app();
1460
1461                 if (!$contact['remote_self']) {
1462                         return false;
1463                 }
1464
1465                 // Prevent the forwarding of posts that are forwarded
1466                 if ($datarray["extid"] == NETWORK_DFRN) {
1467                         logger('Already forwarded', LOGGER_DEBUG);
1468                         return false;
1469                 }
1470
1471                 // Prevent to forward already forwarded posts
1472                 if ($datarray["app"] == $a->get_hostname()) {
1473                         logger('Already forwarded (second test)', LOGGER_DEBUG);
1474                         return false;
1475                 }
1476
1477                 // Only forward posts
1478                 if ($datarray["verb"] != ACTIVITY_POST) {
1479                         logger('No post', LOGGER_DEBUG);
1480                         return false;
1481                 }
1482
1483                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
1484                         logger('Not public', LOGGER_DEBUG);
1485                         return false;
1486                 }
1487
1488                 $datarray2 = $datarray;
1489                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
1490                 if ($contact['remote_self'] == 2) {
1491                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1492                                         ['uid' => $contact['uid'], 'self' => true]);
1493                         if (DBM::is_result($self)) {
1494                                 $datarray['contact-id'] = $self["id"];
1495
1496                                 $datarray['owner-name'] = $self["name"];
1497                                 $datarray['owner-link'] = $self["url"];
1498                                 $datarray['owner-avatar'] = $self["thumb"];
1499
1500                                 $datarray['author-name']   = $datarray['owner-name'];
1501                                 $datarray['author-link']   = $datarray['owner-link'];
1502                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
1503
1504                                 unset($datarray['created']);
1505                                 unset($datarray['edited']);
1506
1507                                 unset($datarray['network']);
1508                                 unset($datarray['owner-id']);
1509                                 unset($datarray['author-id']);
1510                         }
1511
1512                         if ($contact['network'] != NETWORK_FEED) {
1513                                 $datarray["guid"] = get_guid(32);
1514                                 unset($datarray["plink"]);
1515                                 $datarray["uri"] = item_new_uri($a->get_hostname(), $contact['uid'], $datarray["guid"]);
1516                                 $datarray["parent-uri"] = $datarray["uri"];
1517                                 $datarray["thr-parent"] = $datarray["uri"];
1518                                 $datarray["extid"] = NETWORK_DFRN;
1519                                 $urlpart = parse_url($datarray2['author-link']);
1520                                 $datarray["app"] = $urlpart["host"];
1521                         } else {
1522                                 $datarray['private'] = 0;
1523                         }
1524                 }
1525
1526                 if ($contact['network'] != NETWORK_FEED) {
1527                         // Store the original post
1528                         $result = self::insert($datarray2, false, false);
1529                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
1530                 } else {
1531                         $datarray["app"] = "Feed";
1532                         $result = true;
1533                 }
1534
1535                 // Trigger automatic reactions for addons
1536                 $datarray['api_source'] = true;
1537
1538                 // We have to tell the hooks who we are - this really should be improved
1539                 $_SESSION["authenticated"] = true;
1540                 $_SESSION["uid"] = $contact['uid'];
1541
1542                 return $result;
1543         }
1544
1545         /**
1546          *
1547          * @param string $s
1548          * @param int    $uid
1549          * @param array  $item
1550          * @param int    $cid
1551          * @return string
1552          */
1553         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
1554         {
1555                 if (Config::get('system', 'disable_embedded')) {
1556                         return $s;
1557                 }
1558
1559                 logger('check for photos', LOGGER_DEBUG);
1560                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
1561
1562                 $orig_body = $s;
1563                 $new_body = '';
1564
1565                 $img_start = strpos($orig_body, '[img');
1566                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1567                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1568
1569                 while (($img_st_close !== false) && ($img_len !== false)) {
1570                         $img_st_close++; // make it point to AFTER the closing bracket
1571                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
1572
1573                         logger('found photo ' . $image, LOGGER_DEBUG);
1574
1575                         if (stristr($image, $site . '/photo/')) {
1576                                 // Only embed locally hosted photos
1577                                 $replace = false;
1578                                 $i = basename($image);
1579                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
1580                                 $x = strpos($i, '-');
1581
1582                                 if ($x) {
1583                                         $res = substr($i, $x + 1);
1584                                         $i = substr($i, 0, $x);
1585                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
1586                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
1587                                         if (DBM::is_result($photo)) {
1588                                                 /*
1589                                                  * Check to see if we should replace this photo link with an embedded image
1590                                                  * 1. No need to do so if the photo is public
1591                                                  * 2. If there's a contact-id provided, see if they're in the access list
1592                                                  *    for the photo. If so, embed it.
1593                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
1594                                                  *    permissions, regardless of order but first check to see if they're an exact
1595                                                  *    match to save some processing overhead.
1596                                                  */
1597                                                 if (self::hasPermissions($photo)) {
1598                                                         if ($cid) {
1599                                                                 $recips = self::enumeratePermissions($photo);
1600                                                                 if (in_array($cid, $recips)) {
1601                                                                         $replace = true;
1602                                                                 }
1603                                                         } elseif ($item) {
1604                                                                 if (self::samePermissions($item, $photo)) {
1605                                                                         $replace = true;
1606                                                                 }
1607                                                         }
1608                                                 }
1609                                                 if ($replace) {
1610                                                         $data = $photo['data'];
1611                                                         $type = $photo['type'];
1612
1613                                                         // If a custom width and height were specified, apply before embedding
1614                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
1615                                                                 logger('scaling photo', LOGGER_DEBUG);
1616
1617                                                                 $width = intval($match[1]);
1618                                                                 $height = intval($match[2]);
1619
1620                                                                 $Image = new Image($data, $type);
1621                                                                 if ($Image->isValid()) {
1622                                                                         $Image->scaleDown(max($width, $height));
1623                                                                         $data = $Image->asString();
1624                                                                         $type = $Image->getType();
1625                                                                 }
1626                                                         }
1627
1628                                                         logger('replacing photo', LOGGER_DEBUG);
1629                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
1630                                                         logger('replaced: ' . $image, LOGGER_DATA);
1631                                                 }
1632                                         }
1633                                 }
1634                         }
1635
1636                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
1637                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
1638                         if ($orig_body === false) {
1639                                 $orig_body = '';
1640                         }
1641
1642                         $img_start = strpos($orig_body, '[img');
1643                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1644                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1645                 }
1646
1647                 $new_body = $new_body . $orig_body;
1648
1649                 return $new_body;
1650         }
1651
1652         private static function hasPermissions($obj)
1653         {
1654                 return (
1655                         (
1656                                 x($obj, 'allow_cid')
1657                         ) || (
1658                                 x($obj, 'allow_gid')
1659                         ) || (
1660                                 x($obj, 'deny_cid')
1661                         ) || (
1662                                 x($obj, 'deny_gid')
1663                         )
1664                 );
1665         }
1666
1667         private static function samePermissions($obj1, $obj2)
1668         {
1669                 // first part is easy. Check that these are exactly the same.
1670                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
1671                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
1672                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
1673                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
1674                         return true;
1675                 }
1676
1677                 // This is harder. Parse all the permissions and compare the resulting set.
1678                 $recipients1 = self::enumeratePermissions($obj1);
1679                 $recipients2 = self::enumeratePermissions($obj2);
1680                 sort($recipients1);
1681                 sort($recipients2);
1682
1683                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
1684                 return ($recipients1 == $recipients2);
1685         }
1686
1687         // returns an array of contact-ids that are allowed to see this object
1688         private static function enumeratePermissions($obj)
1689         {
1690                 $allow_people = expand_acl($obj['allow_cid']);
1691                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
1692                 $deny_people  = expand_acl($obj['deny_cid']);
1693                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
1694                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
1695                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
1696                 $recipients   = array_diff($recipients, $deny);
1697                 return $recipients;
1698         }
1699
1700         public static function getFeedTags($item)
1701         {
1702                 $ret = [];
1703                 $matches = false;
1704                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1705                 if ($cnt) {
1706                         for ($x = 0; $x < $cnt; $x ++) {
1707                                 if ($matches[1][$x]) {
1708                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
1709                                 }
1710                         }
1711                 }
1712                 $matches = false;
1713                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1714                 if ($cnt) {
1715                         for ($x = 0; $x < $cnt; $x ++) {
1716                                 if ($matches[1][$x]) {
1717                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
1718                                 }
1719                         }
1720                 }
1721                 return $ret;
1722         }
1723
1724         public static function expire($uid, $days, $network = "", $force = false)
1725         {
1726                 if (!$uid || ($days < 1)) {
1727                         return;
1728                 }
1729
1730                 /*
1731                  * $expire_network_only = save your own wall posts
1732                  * and just expire conversations started by others
1733                  */
1734                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
1735                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
1736
1737                 if ($network != "") {
1738                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
1739
1740                         /*
1741                          * There is an index "uid_network_received" but not "uid_network_created"
1742                          * This avoids the creation of another index just for one purpose.
1743                          * And it doesn't really matter wether to look at "received" or "created"
1744                          */
1745                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1746                 } else {
1747                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1748                 }
1749
1750                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
1751                         WHERE `uid` = %d $range
1752                         AND `id` = `parent`
1753                         $sql_extra
1754                         AND `deleted` = 0",
1755                         intval($uid),
1756                         intval($days)
1757                 );
1758
1759                 if (!DBM::is_result($r)) {
1760                         return;
1761                 }
1762
1763                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
1764
1765                 // Forcing expiring of items - but not notes and marked items
1766                 if ($force) {
1767                         $expire_items = true;
1768                 }
1769
1770                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
1771                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
1772                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
1773
1774                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
1775
1776                 foreach ($r as $item) {
1777
1778                         // don't expire filed items
1779
1780                         if (strpos($item['file'],'[') !== false) {
1781                                 continue;
1782                         }
1783
1784                         // Only expire posts, not photos and photo comments
1785
1786                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
1787                                 continue;
1788                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
1789                                 continue;
1790                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
1791                                 continue;
1792                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
1793                                 continue;
1794                         }
1795
1796                         self::deleteById($item['id'], PRIORITY_LOW);
1797                 }
1798         }
1799
1800         public static function firstPostDate($uid, $wall = false)
1801         {
1802                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
1803                 $params = ['order' => ['created' => false]];
1804                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
1805                 if (DBM::is_result($thread)) {
1806                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
1807                 }
1808                 return false;
1809         }
1810
1811         /**
1812          * @brief add/remove activity to an item
1813          *
1814          * Toggle activities as like,dislike,attend of an item
1815          *
1816          * @param string $item_id
1817          * @param string $verb
1818          *              Activity verb. One of
1819          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
1820          *                      attendno, unattendno, attendmaybe, unattendmaybe
1821          * @hook 'post_local_end'
1822          *              array $arr
1823          *                      'post_id' => ID of posted item
1824          */
1825         public static function performLike($item_id, $verb)
1826         {
1827                 if (!local_user() && !remote_user()) {
1828                         return false;
1829                 }
1830
1831                 switch ($verb) {
1832                         case 'like':
1833                         case 'unlike':
1834                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
1835                                 $activity = ACTIVITY_LIKE;
1836                                 break;
1837                         case 'dislike':
1838                         case 'undislike':
1839                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
1840                                 $activity = ACTIVITY_DISLIKE;
1841                                 break;
1842                         case 'attendyes':
1843                         case 'unattendyes':
1844                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
1845                                 $activity = ACTIVITY_ATTEND;
1846                                 break;
1847                         case 'attendno':
1848                         case 'unattendno':
1849                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
1850                                 $activity = ACTIVITY_ATTENDNO;
1851                                 break;
1852                         case 'attendmaybe':
1853                         case 'unattendmaybe':
1854                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
1855                                 $activity = ACTIVITY_ATTENDMAYBE;
1856                                 break;
1857                         default:
1858                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
1859                                 return false;
1860                 }
1861
1862                 // Enable activity toggling instead of on/off
1863                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
1864
1865                 logger('like: verb ' . $verb . ' item ' . $item_id);
1866
1867                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
1868                 if (!DBM::is_result($item)) {
1869                         logger('like: unknown item ' . $item_id);
1870                         return false;
1871                 }
1872
1873                 $uid = $item['uid'];
1874                 if (($uid == 0) && local_user()) {
1875                         $uid = local_user();
1876                 }
1877
1878                 if (!can_write_wall($uid)) {
1879                         logger('like: unable to write on wall ' . $uid);
1880                         return false;
1881                 }
1882
1883                 // Retrieves the local post owner
1884                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
1885                 if (!DBM::is_result($owner_self_contact)) {
1886                         logger('like: unknown owner ' . $uid);
1887                         return false;
1888                 }
1889
1890                 // Retrieve the current logged in user's public contact
1891                 $author_id = public_contact();
1892
1893                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
1894                 if (!DBM::is_result($author_contact)) {
1895                         logger('like: unknown author ' . $author_id);
1896                         return false;
1897                 }
1898
1899                 // Contact-id is the uid-dependant author contact
1900                 if (local_user() == $uid) {
1901                         $item_contact_id = $owner_self_contact['id'];
1902                         $item_contact = $owner_self_contact;
1903                 } else {
1904                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
1905                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
1906                         if (!DBM::is_result($item_contact)) {
1907                                 logger('like: unknown item contact ' . $item_contact_id);
1908                                 return false;
1909                         }
1910                 }
1911
1912                 // Look for an existing verb row
1913                 // event participation are essentially radio toggles. If you make a subsequent choice,
1914                 // we need to eradicate your first choice.
1915                 if ($event_verb_flag) {
1916                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
1917                 } else {
1918                         $verbs = "'".dbesc($activity)."'";
1919                 }
1920
1921                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
1922                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
1923                         WHERE `verb` IN ($verbs)
1924                         AND `deleted` = 0
1925                         AND `author-id` = %d
1926                         AND `uid` = %d
1927                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
1928                         LIMIT 1",
1929                         intval($author_contact['id']),
1930                         intval($item['uid']),
1931                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
1932                 );
1933
1934                 // If it exists, mark it as deleted
1935                 if (DBM::is_result($existing_like)) {
1936                         $like_item = $existing_like[0];
1937
1938                         // Already voted, undo it
1939                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
1940                         dba::update('item', $fields, ['id' => $like_item['id']]);
1941
1942                         // Clean up the Diaspora signatures for this like
1943                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
1944                         // if it had been enabled in the past
1945                         dba::delete('sign', ['iid' => $like_item['id']]);
1946
1947                         $like_item_id = $like_item['id'];
1948                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
1949
1950                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
1951                                 return true;
1952                         }
1953                 }
1954
1955                 // Verb is "un-something", just trying to delete existing entries
1956                 if (strpos($verb, 'un') === 0) {
1957                         return true;
1958                 }
1959
1960                 // Else or if event verb different from existing row, create a new item row
1961                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
1962                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
1963                         $post_type = L10n::t('event');
1964                 }
1965                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
1966                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
1967                 $body = $item['body'];
1968
1969                 $obj = <<< EOT
1970
1971                 <object>
1972                         <type>$objtype</type>
1973                         <local>1</local>
1974                         <id>{$item['uri']}</id>
1975                         <link>$link</link>
1976                         <title></title>
1977                         <content>$body</content>
1978                 </object>
1979 EOT;
1980
1981                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
1982                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
1983                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
1984
1985                 $new_item = [
1986                         'guid'          => get_guid(32),
1987                         'uri'           => item_new_uri(self::getApp()->get_hostname(), $item['uid']),
1988                         'uid'           => $item['uid'],
1989                         'contact-id'    => $item_contact_id,
1990                         'type'          => 'activity',
1991                         'wall'          => $item['wall'],
1992                         'origin'        => 1,
1993                         'gravity'       => GRAVITY_LIKE,
1994                         'parent'        => $item['id'],
1995                         'parent-uri'    => $item['uri'],
1996                         'thr-parent'    => $item['uri'],
1997                         'owner-id'      => $item['owner-id'],
1998                         'owner-name'    => $item['owner-name'],
1999                         'owner-link'    => $item['owner-link'],
2000                         'owner-avatar'  => $item['owner-avatar'],
2001                         'author-id'     => $author_contact['id'],
2002                         'author-name'   => $author_contact['name'],
2003                         'author-link'   => $author_contact['url'],
2004                         'author-avatar' => $author_contact['thumb'],
2005                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2006                         'verb'          => $activity,
2007                         'object-type'   => $objtype,
2008                         'object'        => $obj,
2009                         'allow_cid'     => $item['allow_cid'],
2010                         'allow_gid'     => $item['allow_gid'],
2011                         'deny_cid'      => $item['deny_cid'],
2012                         'deny_gid'      => $item['deny_gid'],
2013                         'visible'       => 1,
2014                         'unseen'        => 1,
2015                 ];
2016
2017                 $new_item_id = self::insert($new_item);
2018
2019                 // If the parent item isn't visible then set it to visible
2020                 if (!$item['visible']) {
2021                         self::update(['visible' => true], ['id' => $item['id']]);
2022                 }
2023
2024                 // Save the author information for the like in case we need to relay to Diaspora
2025                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2026
2027                 $new_item['id'] = $new_item_id;
2028
2029                 Addon::callHooks('post_local_end', $new_item);
2030
2031                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2032
2033                 return true;
2034         }
2035
2036         private static function addThread($itemid, $onlyshadow = false)
2037         {
2038                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2039                         'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
2040                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2041                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2042                 $item = dba::selectFirst('item', $fields, $condition);
2043
2044                 if (!DBM::is_result($item)) {
2045                         return;
2046                 }
2047
2048                 $item['iid'] = $itemid;
2049
2050                 if (!$onlyshadow) {
2051                         $result = dba::insert('thread', $item);
2052
2053                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2054                 }
2055         }
2056
2057         private static function updateThread($itemid, $setmention = false)
2058         {
2059                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
2060                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
2061                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id', 'rendered-html', 'rendered-hash'];
2062                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2063
2064                 $item = dba::selectFirst('item', $fields, $condition);
2065                 if (!DBM::is_result($item)) {
2066                         return;
2067                 }
2068
2069                 if ($setmention) {
2070                         $item["mention"] = 1;
2071                 }
2072
2073                 $sql = "";
2074
2075                 $fields = [];
2076
2077                 foreach ($item as $field => $data) {
2078                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
2079                                 $fields[$field] = $data;
2080                         }
2081                 }
2082
2083                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2084
2085                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2086
2087                 // Updating a shadow item entry
2088                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
2089
2090                 if (!DBM::is_result($items)) {
2091                         return;
2092                 }
2093
2094                 $fields = ['title' => $item['title'], 'body' => $item['body'],
2095                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2096                 $result = dba::update('item', $fields, ['id' => $items['id']]);
2097
2098                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
2099         }
2100
2101         private static function deleteThread($itemid, $itemuri = "")
2102         {
2103                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2104                 if (!DBM::is_result($item)) {
2105                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2106                         return;
2107                 }
2108
2109                 // Using dba::delete at this time could delete the associated item entries
2110                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2111
2112                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2113
2114                 if ($itemuri != "") {
2115                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2116                         if (!dba::exists('item', $condition)) {
2117                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2118                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2119                         }
2120                 }
2121         }
2122 }