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                         // Only call the notifier when the item has some content relevant change.
  80                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
  81                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
  82                         }
  83                 }
  84
  85                 dba::close($items);
  86                 dba::commit();
  87                 return $rows;
  88         }
  89
  90         /**
  91          * @brief Delete an item and notify others about it - if it was ours
  92          *
  93          * @param array $condition The condition for finding the item entries
  94          * @param integer $priority Priority for the notification
  95          */
  96         public static function delete($condition, $priority = PRIORITY_HIGH)
  97         {
  98                 $items = dba::select('item', ['id'], $condition);
  99                 while ($item = dba::fetch($items)) {
 100                         self::deleteById($item['id'], $priority);
 101                 }
 102                 dba::close($items);
 103         }
 104
 105         /**
 106          * @brief Delete an item for an user and notify others about it - if it was ours
 107          *
 108          * @param array $condition The condition for finding the item entries
 109          * @param integer $uid User who wants to delete this item
 110          */
 111         public static function deleteForUser($condition, $uid)
 112         {
 113                 if ($uid == 0) {
 114                         return;
 115                 }
 116
 117                 $items = dba::select('item', ['id', 'uid'], $condition);
 118                 while ($item = dba::fetch($items)) {
 119                         // "Deleting" global items just means hiding them
 120                         if ($item['uid'] == 0) {
 121                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 122                         } elseif ($item['uid'] == $uid) {
 123                                 self::deleteById($item['id'], PRIORITY_HIGH);
 124                         } else {
 125                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 126                         }
 127                 }
 128                 dba::close($items);
 129         }
 130
 131         /**
 132          * @brief Delete an item and notify others about it - if it was ours
 133          *
 134          * @param integer $item_id Item ID that should be delete
 135          * @param integer $priority Priority for the notification
 136          *
 137          * @return boolean success
 138          */
 139         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 140         {
 141                 // locate item to be deleted
 142                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 143                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 144                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 145                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 146                 if (!DBM::is_result($item)) {
 147                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 148                         return false;
 149                 }
 150
 151                 if ($item['deleted']) {
 152                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 153                         return false;
 154                 }
 155
 156                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 157                 if (!DBM::is_result($parent)) {
 158                         $parent = ['origin' => false];
 159                 }
 160
 161                 // clean up categories and tags so they don't end up as orphans
 162
 163                 $matches = false;
 164                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 165                 if ($cnt) {
 166                         foreach ($matches as $mtch) {
 167                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 168                         }
 169                 }
 170
 171                 $matches = false;
 172
 173                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 174                 if ($cnt) {
 175                         foreach ($matches as $mtch) {
 176                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 177                         }
 178                 }
 179
 180                 /*
 181                  * If item is a link to a photo resource, nuke all the associated photos
 182                  * (visitors will not have photo resources)
 183                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 184                  * generate a resource-id and therefore aren't intimately linked to the item.
 185                  */
 186                 if (strlen($item['resource-id'])) {
 187                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 188                 }
 189
 190                 // If item is a link to an event, delete the event.
 191                 if (intval($item['event-id'])) {
 192                         Event::delete($item['event-id']);
 193                 }
 194
 195                 // If item has attachments, drop them
 196                 foreach (explode(", ", $item['attach']) as $attach) {
 197                         preg_match("|attach/(\d+)|", $attach, $matches);
 198                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 199                 }
 200
 201                 // Delete tags that had been attached to other items
 202                 self::deleteTagsFromItem($item);
 203
 204                 // Set the item to "deleted"
 205                 dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
 206                                         'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 207                                 ['id' => $item['id']]);
 208
 209                 Term::insertFromTagFieldByItemId($item['id']);
 210                 Term::insertFromFileFieldByItemId($item['id']);
 211                 self::deleteThread($item['id'], $item['parent-uri']);
 212
 213                 if (!dba::exists('item', ["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 214                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 215                 }
 216
 217                 // If it's the parent of a comment thread, kill all the kids
 218                 if ($item['id'] == $item['parent']) {
 219                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 220                 }
 221
 222                 // Is it our comment and/or our thread?
 223                 if ($item['origin'] || $parent['origin']) {
 224
 225                         // When we delete the original post we will delete all existing copies on the server as well
 226                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 227
 228                         // send the notification upstream/downstream
 229                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 230                 } elseif ($item['uid'] != 0) {
 231
 232                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 233                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 234                         if (DBM::is_result($global_item)) {
 235                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 236                         }
 237                 }
 238
 239                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 240
 241                 return true;
 242         }
 243
 244         private static function deleteTagsFromItem($item)
 245         {
 246                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 247                         return;
 248                 }
 249
 250                 $xo = XML::parseString($item["object"], false);
 251                 $xt = XML::parseString($item["target"], false);
 252
 253                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 254                         return;
 255                 }
 256
 257                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 258                 if (!DBM::is_result($i)) {
 259                         return;
 260                 }
 261
 262                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 263                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 264                 $author_copy = $item["origin"];
 265
 266                 if (($owner_remove && $author_copy) || !$owner_remove) {
 267                         return;
 268                 }
 269
 270                 $tags = explode(',', $i["tag"]);
 271                 $newtags = [];
 272                 if (count($tags)) {
 273                         foreach ($tags as $tag) {
 274                                 if (trim($tag) !== trim($xo->body)) {
 275                                        $newtags[] = trim($tag);
 276                                 }
 277                         }
 278                 }
 279                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 280         }
 281
 282         private static function guid($item, $notify)
 283         {
 284                 $guid = notags(trim($item['guid']));
 285
 286                 if (!empty($guid)) {
 287                         return $guid;
 288                 }
 289
 290                 if ($notify) {
 291                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 292                         // We add the hash of our own host because our host is the original creator of the post.
 293                         $prefix_host = get_app()->get_hostname();
 294                 } else {
 295                         $prefix_host = '';
 296
 297                         // We are only storing the post so we create a GUID from the original hostname.
 298                         if (!empty($item['author-link'])) {
 299                                 $parsed = parse_url($item['author-link']);
 300                                 if (!empty($parsed['host'])) {
 301                                         $prefix_host = $parsed['host'];
 302                                 }
 303                         }
 304
 305                         if (empty($prefix_host) && !empty($item['plink'])) {
 306                                 $parsed = parse_url($item['plink']);
 307                                 if (!empty($parsed['host'])) {
 308                                         $prefix_host = $parsed['host'];
 309                                 }
 310                         }
 311
 312                         if (empty($prefix_host) && !empty($item['uri'])) {
 313                                 $parsed = parse_url($item['uri']);
 314                                 if (!empty($parsed['host'])) {
 315                                         $prefix_host = $parsed['host'];
 316                                 }
 317                         }
 318
 319                         // Is it in the format data@host.tld? - Used for mail contacts
 320                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 321                                 $mailparts = explode('@', $item['author-link']);
 322                                 $prefix_host = array_pop($mailparts);
 323                         }
 324                 }
 325
 326                 if (!empty($item['plink'])) {
 327                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 328                 } elseif (!empty($item['uri'])) {
 329                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 330                 } else {
 331                         $guid = get_guid(32, hash('crc32', $prefix_host));
 332                 }
 333
 334                 return $guid;
 335         }
 336
 337         private static function contactId($item)
 338         {
 339                 $contact_id = (int)$item["contact-id"];
 340
 341                 if (!empty($contact_id)) {
 342                         return $contact_id;
 343                 }
 344                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 345                 /*
 346                  * First we are looking for a suitable contact that matches with the author of the post
 347                  * This is done only for comments
 348                  */
 349                 if ($item['parent-uri'] != $item['uri']) {
 350                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 351                 }
 352
 353                 // If not present then maybe the owner was found
 354                 if ($contact_id == 0) {
 355                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 356                 }
 357
 358                 // Still missing? Then use the "self" contact of the current user
 359                 if ($contact_id == 0) {
 360                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 361                         if (DBM::is_result($self)) {
 362                                 $contact_id = $self["id"];
 363                         }
 364                 }
 365                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 366
 367                 return $contact_id;
 368         }
 369
 370         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 371         {
 372                 $a = get_app();
 373
 374                 // If it is a posting where users should get notifications, then define it as wall posting
 375                 if ($notify) {
 376                         $item['wall'] = 1;
 377                         $item['type'] = 'wall';
 378                         $item['origin'] = 1;
 379                         $item['network'] = NETWORK_DFRN;
 380                         $item['protocol'] = PROTOCOL_DFRN;
 381
 382                         if (is_int($notify)) {
 383                                 $priority = $notify;
 384                         } else {
 385                                 $priority = PRIORITY_HIGH;
 386                         }
 387                 } else {
 388                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 389                 }
 390
 391                 $item['guid'] = self::guid($item, $notify);
 392                 $item['uri'] = notags(trim(defaults($item, 'uri', item_new_uri($a->get_hostname(), $item['uid'], $item['guid']))));
 393
 394                 // Store conversation data
 395                 $item = Conversation::insert($item);
 396
 397                 /*
 398                  * If a Diaspora signature structure was passed in, pull it out of the
 399                  * item array and set it aside for later storage.
 400                  */
 401
 402                 $dsprsig = null;
 403                 if (x($item, 'dsprsig')) {
 404                         $encoded_signature = $item['dsprsig'];
 405                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 406                         unset($item['dsprsig']);
 407                 }
 408
 409                 if (!empty($item['diaspora_signed_text'])) {
 410                         $diaspora_signed_text = $item['diaspora_signed_text'];
 411                         unset($item['diaspora_signed_text']);
 412                 } else {
 413                         $diaspora_signed_text = '';
 414                 }
 415
 416                 // Converting the plink
 417                 /// @TODO Check if this is really still needed
 418                 if ($item['network'] == NETWORK_OSTATUS) {
 419                         if (isset($item['plink'])) {
 420                                 $item['plink'] = OStatus::convertHref($item['plink']);
 421                         } elseif (isset($item['uri'])) {
 422                                 $item['plink'] = OStatus::convertHref($item['uri']);
 423                         }
 424                 }
 425
 426                 if (!empty($item['thr-parent'])) {
 427                         $item['parent-uri'] = $item['thr-parent'];
 428                 }
 429
 430                 if (x($item, 'gravity')) {
 431                         $item['gravity'] = intval($item['gravity']);
 432                 } elseif ($item['parent-uri'] === $item['uri']) {
 433                         $item['gravity'] = 0;
 434                 } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
 435                         $item['gravity'] = 6;
 436                 } else {
 437                         $item['gravity'] = 6;   // extensible catchall
 438                 }
 439
 440                 $item['type'] = defaults($item, 'type', 'remote');
 441
 442                 $uid = intval($item['uid']);
 443
 444                 // check for create date and expire time
 445                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 446
 447                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 448                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 449                         $expire_interval = $user['expire'];
 450                 }
 451
 452                 if (($expire_interval > 0) && !empty($item['created'])) {
 453                         $expire_date = time() - ($expire_interval * 86400);
 454                         $created_date = strtotime($item['created']);
 455                         if ($created_date < $expire_date) {
 456                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
 457                                 return 0;
 458                         }
 459                 }
 460
 461                 /*
 462                  * Do we already have this item?
 463                  * We have to check several networks since Friendica posts could be repeated
 464                  * via OStatus (maybe Diasporsa as well)
 465                  */
 466                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
 467                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
 468                                 trim($item['uri']), $item['uid'],
 469                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
 470                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
 471                         if (DBM::is_result($existing)) {
 472                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 473                                 if ($uid != 0) {
 474                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
 475                                 }
 476
 477                                 return $existing["id"];
 478                         }
 479                 }
 480
 481                 self::addLanguageInPostopts($item);
 482
 483                 $item['wall']          = intval(defaults($item, 'wall', 0));
 484                 $item['extid']         = trim(defaults($item, 'extid', ''));
 485                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
 486                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
 487                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
 488                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
 489                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
 490                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
 491                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
 492                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
 493                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
 494                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
 495                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 496                 $item['title']         = trim(defaults($item, 'title', ''));
 497                 $item['location']      = trim(defaults($item, 'location', ''));
 498                 $item['coord']         = trim(defaults($item, 'coord', ''));
 499                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
 500                 $item['deleted']       = 0;
 501                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
 502                 $item['verb']          = trim(defaults($item, 'verb', ''));
 503                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
 504                 $item['object']        = trim(defaults($item, 'object', ''));
 505                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
 506                 $item['target']        = trim(defaults($item, 'target', ''));
 507                 $item['plink']         = trim(defaults($item, 'plink', ''));
 508                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
 509                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
 510                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
 511                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
 512                 $item['private']       = intval(defaults($item, 'private', 0));
 513                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
 514                 $item['body']          = trim(defaults($item, 'body', ''));
 515                 $item['tag']           = trim(defaults($item, 'tag', ''));
 516                 $item['attach']        = trim(defaults($item, 'attach', ''));
 517                 $item['app']           = trim(defaults($item, 'app', ''));
 518                 $item['origin']        = intval(defaults($item, 'origin', 0));
 519                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
 520                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
 521                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
 522                 $item['inform']        = trim(defaults($item, 'inform', ''));
 523                 $item['file']          = trim(defaults($item, 'file', ''));
 524
 525                 // When there is no content then we don't post it
 526                 if ($item['body'].$item['title'] == '') {
 527                         return 0;
 528                 }
 529
 530                 // Items cannot be stored before they happen ...
 531                 if ($item['created'] > DateTimeFormat::utcNow()) {
 532                         $item['created'] = DateTimeFormat::utcNow();
 533                 }
 534
 535                 // We haven't invented time travel by now.
 536                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 537                         $item['edited'] = DateTimeFormat::utcNow();
 538                 }
 539
 540                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
 541                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
 542                 }
 543
 544                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
 545
 546                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 547                 $item["contact-id"] = self::contactId($item);
 548
 549                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 550                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 551
 552                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
 553
 554                 if (Contact::isBlocked($item["author-id"])) {
 555                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
 556                         return 0;
 557                 }
 558
 559                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 560                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 561
 562                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
 563
 564                 if (Contact::isBlocked($item["owner-id"])) {
 565                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
 566                         return 0;
 567                 }
 568
 569                 if ($item['network'] == NETWORK_PHANTOM) {
 570                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
 571
 572                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
 573                         if (!empty($contact['network'])) {
 574                                 $item['network'] = $contact["network"];
 575                         } else {
 576                                 $item['network'] = NETWORK_DFRN;
 577                         }
 578                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
 579                 }
 580
 581                 // Checking if there is already an item with the same guid
 582                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
 583                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 584                 if (dba::exists('item', $condition)) {
 585                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
 586                         return 0;
 587                 }
 588
 589                 // Check for hashtags in the body and repair or add hashtag links
 590                 self::setHashtags($item);
 591
 592                 $item['thr-parent'] = $item['parent-uri'];
 593
 594                 $notify_type = '';
 595                 $allow_cid = '';
 596                 $allow_gid = '';
 597                 $deny_cid  = '';
 598                 $deny_gid  = '';
 599
 600                 if ($item['parent-uri'] === $item['uri']) {
 601                         $parent_id = 0;
 602                         $parent_deleted = 0;
 603                         $allow_cid = $item['allow_cid'];
 604                         $allow_gid = $item['allow_gid'];
 605                         $deny_cid  = $item['deny_cid'];
 606                         $deny_gid  = $item['deny_gid'];
 607                         $notify_type = 'wall-new';
 608                 } else {
 609                         // find the parent and snarf the item id and ACLs
 610                         // and anything else we need to inherit
 611
 612                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
 613                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 614                                 'wall', 'private', 'forum_mode', 'origin'];
 615                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
 616                         $params = ['order' => ['id' => false]];
 617                         $parent = dba::selectFirst('item', $fields, $condition, $params);
 618
 619                         if (DBM::is_result($parent)) {
 620                                 // is the new message multi-level threaded?
 621                                 // even though we don't support it now, preserve the info
 622                                 // and re-attach to the conversation parent.
 623
 624                                 if ($parent['uri'] != $parent['parent-uri']) {
 625                                         $item['parent-uri'] = $parent['parent-uri'];
 626
 627                                         $condition = ['uri' => $item['parent-uri'],
 628                                                 'parent-uri' => $item['parent-uri'],
 629                                                 'uid' => $item['uid']];
 630                                         $params = ['order' => ['id' => false]];
 631                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
 632
 633                                         if (DBM::is_result($toplevel_parent)) {
 634                                                 $parent = $toplevel_parent;
 635                                         }
 636                                 }
 637
 638                                 $parent_id      = $parent['id'];
 639                                 $parent_deleted = $parent['deleted'];
 640                                 $allow_cid      = $parent['allow_cid'];
 641                                 $allow_gid      = $parent['allow_gid'];
 642                                 $deny_cid       = $parent['deny_cid'];
 643                                 $deny_gid       = $parent['deny_gid'];
 644                                 $item['wall']    = $parent['wall'];
 645                                 $notify_type    = 'comment-new';
 646
 647                                 /*
 648                                  * If the parent is private, force privacy for the entire conversation
 649                                  * This differs from the above settings as it subtly allows comments from
 650                                  * email correspondents to be private even if the overall thread is not.
 651                                  */
 652                                 if ($parent['private']) {
 653                                         $item['private'] = $parent['private'];
 654                                 }
 655
 656                                 /*
 657                                  * Edge case. We host a public forum that was originally posted to privately.
 658                                  * The original author commented, but as this is a comment, the permissions
 659                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
 660                                  */
 661                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
 662                                         $item['private'] = 0;
 663                                 }
 664
 665                                 // If its a post from myself then tag the thread as "mention"
 666                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
 667                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
 668                                 if (DBM::is_result($user)) {
 669                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
 670                                         logger("'myself' is ".$self." for parent ".$parent_id." checking against ".$item['author-link']." and ".$item['owner-link'], LOGGER_DEBUG);
 671                                         if ((normalise_link($item['author-link']) == $self) || (normalise_link($item['owner-link']) == $self)) {
 672                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
 673                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
 674                                         }
 675                                 }
 676                         } else {
 677                                 /*
 678                                  * Allow one to see reply tweets from status.net even when
 679                                  * we don't have or can't see the original post.
 680                                  */
 681                                 if ($force_parent) {
 682                                         logger('$force_parent=true, reply converted to top-level post.');
 683                                         $parent_id = 0;
 684                                         $item['parent-uri'] = $item['uri'];
 685                                         $item['gravity'] = 0;
 686                                 } else {
 687                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
 688                                         return 0;
 689                                 }
 690
 691                                 $parent_deleted = 0;
 692                         }
 693                 }
 694
 695                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
 696                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
 697                 if (dba::exists('item', $condition)) {
 698                         logger('duplicated item with the same uri found. '.print_r($item,true));
 699                         return 0;
 700                 }
 701
 702                 // On Friendica and Diaspora the GUID is unique
 703                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
 704                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 705                         if (dba::exists('item', $condition)) {
 706                                 logger('duplicated item with the same guid found. '.print_r($item,true));
 707                                 return 0;
 708                         }
 709                 } else {
 710                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 711                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 712                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 713                         if (dba::exists('item', $condition)) {
 714                                 logger('duplicated item with the same body found. '.print_r($item,true));
 715                                 return 0;
 716                         }
 717                 }
 718
 719                 // Is this item available in the global items (with uid=0)?
 720                 if ($item["uid"] == 0) {
 721                         $item["global"] = true;
 722
 723                         // Set the global flag on all items if this was a global item entry
 724                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
 725                 } else {
 726                         $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
 727                 }
 728
 729                 // ACL settings
 730                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
 731                         $private = 1;
 732                 } else {
 733                         $private = $item['private'];
 734                 }
 735
 736                 $item["allow_cid"] = $allow_cid;
 737                 $item["allow_gid"] = $allow_gid;
 738                 $item["deny_cid"] = $deny_cid;
 739                 $item["deny_gid"] = $deny_gid;
 740                 $item["private"] = $private;
 741                 $item["deleted"] = $parent_deleted;
 742
 743                 // Fill the cache field
 744                 put_item_in_cache($item);
 745
 746                 if ($notify) {
 747                         Addon::callHooks('post_local', $item);
 748                 } else {
 749                         Addon::callHooks('post_remote', $item);
 750                 }
 751
 752                 // This array field is used to trigger some automatic reactions
 753                 // It is mainly used in the "post_local" hook.
 754                 unset($item['api_source']);
 755
 756                 if (x($item, 'cancel')) {
 757                         logger('post cancelled by addon.');
 758                         return 0;
 759                 }
 760
 761                 /*
 762                  * Check for already added items.
 763                  * There is a timing issue here that sometimes creates double postings.
 764                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 765                  */
 766                 if ($item["uid"] == 0) {
 767                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
 768                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
 769                                 return 0;
 770                         }
 771                 }
 772
 773                 logger('' . print_r($item,true), LOGGER_DATA);
 774
 775                 dba::transaction();
 776                 $ret = dba::insert('item', $item);
 777
 778                 // When the item was successfully stored we fetch the ID of the item.
 779                 if (DBM::is_result($ret)) {
 780                         $current_post = dba::lastInsertId();
 781                 } else {
 782                         // This can happen - for example - if there are locking timeouts.
 783                         dba::rollback();
 784
 785                         // Store the data into a spool file so that we can try again later.
 786
 787                         // At first we restore the Diaspora signature that we removed above.
 788                         if (isset($encoded_signature)) {
 789                                 $item['dsprsig'] = $encoded_signature;
 790                         }
 791
 792                         // Now we store the data in the spool directory
 793                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 794                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
 795
 796                         $spoolpath = get_spoolpath();
 797                         if ($spoolpath != "") {
 798                                 $spool = $spoolpath.'/'.$file;
 799                                 file_put_contents($spool, json_encode($item));
 800                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
 801                         }
 802                         return 0;
 803                 }
 804
 805                 if ($current_post == 0) {
 806                         // This is one of these error messages that never should occur.
 807                         logger("couldn't find created item - we better quit now.");
 808                         dba::rollback();
 809                         return 0;
 810                 }
 811
 812                 // How much entries have we created?
 813                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
 814                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
 815
 816                 if ($entries > 1) {
 817                         // There are duplicates. We delete our just created entry.
 818                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
 819
 820                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
 821                         dba::delete('item', ['id' => $current_post]);
 822                         dba::commit();
 823                         return 0;
 824                 } elseif ($entries == 0) {
 825                         // This really should never happen since we quit earlier if there were problems.
 826                         logger("Something is terribly wrong. We haven't found our created entry.");
 827                         dba::rollback();
 828                         return 0;
 829                 }
 830
 831                 logger('created item '.$current_post);
 832                 self::updateContact($item);
 833
 834                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
 835                         $parent_id = $current_post;
 836                 }
 837
 838                 // Set parent id
 839                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
 840
 841                 $item['id'] = $current_post;
 842                 $item['parent'] = $parent_id;
 843
 844                 // update the commented timestamp on the parent
 845                 // Only update "commented" if it is really a comment
 846                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
 847                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 848                 } else {
 849                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 850                 }
 851
 852                 if ($dsprsig) {
 853                         /*
 854                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
 855                          * We can check for this condition when we decode and encode the stuff again.
 856                          */
 857                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
 858                                 $dsprsig->signature = base64_decode($dsprsig->signature);
 859                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
 860                         }
 861
 862                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
 863                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
 864                 }
 865
 866                 if (!empty($diaspora_signed_text)) {
 867                         // Formerly we stored the signed text, the signature and the author in different fields.
 868                         // We now store the raw data so that we are more flexible.
 869                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
 870                 }
 871
 872                 $deleted = self::tagDeliver($item['uid'], $current_post);
 873
 874                 /*
 875                  * current post can be deleted if is for a community page and no mention are
 876                  * in it.
 877                  */
 878                 if (!$deleted && !$dontcache) {
 879                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
 880                         if (DBM::is_result($posted_item)) {
 881                                 if ($notify) {
 882                                         Addon::callHooks('post_local_end', $posted_item);
 883                                 } else {
 884                                         Addon::callHooks('post_remote_end', $posted_item);
 885                                 }
 886                         } else {
 887                                 logger('new item not found in DB, id ' . $current_post);
 888                         }
 889                 }
 890
 891                 if ($item['parent-uri'] === $item['uri']) {
 892                         self::addThread($current_post);
 893                 } else {
 894                         self::updateThread($parent_id);
 895                 }
 896
 897                 dba::commit();
 898
 899                 /*
 900                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
 901                  * This is not perfect - but a workable solution until we found the reason for the problem.
 902                  */
 903                 Term::insertFromTagFieldByItemId($current_post);
 904                 Term::insertFromFileFieldByItemId($current_post);
 905
 906                 if ($item['parent-uri'] === $item['uri']) {
 907                         self::addShadow($current_post);
 908                 } else {
 909                         self::addShadowPost($current_post);
 910                 }
 911
 912                 check_user_notification($current_post);
 913
 914                 if ($notify) {
 915                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
 916                 } elseif (!empty($parent) && $parent['origin']) {
 917                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
 918                 }
 919
 920                 return $current_post;
 921         }
 922
 923         /**
 924          * @brief Distributes public items to the receivers
 925          *
 926          * @param integer $itemid      Item ID that should be added
 927          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
 928          */
 929         public static function distribute($itemid, $signed_text = '')
 930         {
 931                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
 932                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
 933                 if (!DBM::is_result($parent)) {
 934                         return;
 935                 }
 936
 937                 // Only distribute public items from native networks
 938                 $condition = ['id' => $itemid, 'uid' => 0,
 939                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
 940                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
 941                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
 942                 if (!DBM::is_result($item)) {
 943                         return;
 944                 }
 945
 946                 unset($item['id']);
 947                 unset($item['parent']);
 948                 unset($item['mention']);
 949                 unset($item['wall']);
 950                 unset($item['origin']);
 951                 unset($item['starred']);
 952                 unset($item['rendered-hash']);
 953                 unset($item['rendered-html']);
 954
 955                 $users = [];
 956
 957                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
 958                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
 959                 $contacts = dba::select('contact', ['uid'], $condition);
 960                 while ($contact = dba::fetch($contacts)) {
 961                         $users[$contact['uid']] = $contact['uid'];
 962                 }
 963
 964                 $origin_uid = 0;
 965
 966                 if ($item['uri'] != $item['parent-uri']) {
 967                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
 968                         while ($parent = dba::fetch($parents)) {
 969                                 $users[$parent['uid']] = $parent['uid'];
 970                                 if ($parent['origin'] && !$item['origin']) {
 971                                         $origin_uid = $parent['uid'];
 972                                 }
 973                         }
 974                 }
 975
 976                 foreach ($users as $uid) {
 977                         if ($origin_uid == $uid) {
 978                                 $item['diaspora_signed_text'] = $signed_text;
 979                         }
 980                         self::storeForUser($itemid, $item, $uid);
 981                 }
 982         }
 983
 984         /**
 985          * @brief Store public items for the receivers
 986          *
 987          * @param integer $itemid Item ID that should be added
 988          * @param array   $item   The item entry that will be stored
 989          * @param integer $uid    The user that will receive the item entry
 990          */
 991         private static function storeForUser($itemid, $item, $uid)
 992         {
 993                 $item['uid'] = $uid;
 994                 $item['origin'] = 0;
 995                 $item['wall'] = 0;
 996                 if ($item['uri'] == $item['parent-uri']) {
 997                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
 998                 } else {
 999                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1000                 }
1001
1002                 if (empty($item['contact-id'])) {
1003                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1004                         if (!DBM::is_result($self)) {
1005                                 return;
1006                         }
1007                         $item['contact-id'] = $self['id'];
1008                 }
1009
1010                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1011                         $item['type'] = 'remote-comment';
1012                 } elseif ($item['type'] == 'wall') {
1013                         $item['type'] = 'remote';
1014                 }
1015
1016                 /// @todo Handling of "event-id"
1017
1018                 $notify = false;
1019                 if ($item['uri'] == $item['parent-uri']) {
1020                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1021                         if (DBM::is_result($contact)) {
1022                                 $notify = self::isRemoteSelf($contact, $item);
1023                         }
1024                 }
1025
1026                 $distributed = self::insert($item, false, $notify, true);
1027
1028                 if (!$distributed) {
1029                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1030                 } else {
1031                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1032                 }
1033         }
1034
1035         /**
1036          * @brief Add a shadow entry for a given item id that is a thread starter
1037          *
1038          * We store every public item entry additionally with the user id "0".
1039          * This is used for the community page and for the search.
1040          * It is planned that in the future we will store public item entries only once.
1041          *
1042          * @param integer $itemid Item ID that should be added
1043          */
1044         public static function addShadow($itemid)
1045         {
1046                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1047                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1048                 $item = dba::selectFirst('item', $fields, $condition);
1049
1050                 if (!DBM::is_result($item)) {
1051                         return;
1052                 }
1053
1054                 // is it already a copy?
1055                 if (($itemid == 0) || ($item['uid'] == 0)) {
1056                         return;
1057                 }
1058
1059                 // Is it a visible public post?
1060                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1061                         return;
1062                 }
1063
1064                 // is it an entry from a connector? Only add an entry for natively connected networks
1065                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1066                         return;
1067                 }
1068
1069                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1070
1071                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1072                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1073
1074                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1075                                 // Preparing public shadow (removing user specific data)
1076                                 $item['uid'] = 0;
1077                                 unset($item['id']);
1078                                 unset($item['parent']);
1079                                 unset($item['wall']);
1080                                 unset($item['mention']);
1081                                 unset($item['origin']);
1082                                 unset($item['starred']);
1083                                 unset($item['rendered-hash']);
1084                                 unset($item['rendered-html']);
1085                                 if ($item['uri'] == $item['parent-uri']) {
1086                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1087                                 } else {
1088                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1089                                 }
1090
1091                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1092                                         $item['type'] = 'remote-comment';
1093                                 } elseif ($item['type'] == 'wall') {
1094                                         $item['type'] = 'remote';
1095                                 }
1096
1097                                 $public_shadow = self::insert($item, false, false, true);
1098
1099                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1100                         }
1101                 }
1102         }
1103
1104         /**
1105          * @brief Add a shadow entry for a given item id that is a comment
1106          *
1107          * This function does the same like the function above - but for comments
1108          *
1109          * @param integer $itemid Item ID that should be added
1110          */
1111         public static function addShadowPost($itemid)
1112         {
1113                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1114                 if (!DBM::is_result($item)) {
1115                         return;
1116                 }
1117
1118                 // Is it a toplevel post?
1119                 if ($item['id'] == $item['parent']) {
1120                         self::addShadow($itemid);
1121                         return;
1122                 }
1123
1124                 // Is this a shadow entry?
1125                 if ($item['uid'] == 0)
1126                         return;
1127
1128                 // Is there a shadow parent?
1129                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1130                         return;
1131                 }
1132
1133                 // Is there already a shadow entry?
1134                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1135                         return;
1136                 }
1137
1138                 // Save "origin" and "parent" state
1139                 $origin = $item['origin'];
1140                 $parent = $item['parent'];
1141
1142                 // Preparing public shadow (removing user specific data)
1143                 $item['uid'] = 0;
1144                 unset($item['id']);
1145                 unset($item['parent']);
1146                 unset($item['wall']);
1147                 unset($item['mention']);
1148                 unset($item['origin']);
1149                 unset($item['starred']);
1150                 unset($item['rendered-hash']);
1151                 unset($item['rendered-html']);
1152                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1153
1154                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1155                         $item['type'] = 'remote-comment';
1156                 } elseif ($item['type'] == 'wall') {
1157                         $item['type'] = 'remote';
1158                 }
1159
1160                 $public_shadow = self::insert($item, false, false, true);
1161
1162                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1163
1164                 // If this was a comment to a Diaspora post we don't get our comment back.
1165                 // This means that we have to distribute the comment by ourselves.
1166                 if ($origin) {
1167                         if (dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1168                                 self::distribute($public_shadow);
1169                         }
1170                 }
1171         }
1172
1173          /**
1174          * Adds a "lang" specification in a "postopts" element of given $arr,
1175          * if possible and not already present.
1176          * Expects "body" element to exist in $arr.
1177          */
1178         private static function addLanguageInPostopts(&$item)
1179         {
1180                 if (!empty($item['postopts'])) {
1181                         if (strstr($item['postopts'], 'lang=')) {
1182                                 // do not override
1183                                 return;
1184                         }
1185                         $postopts = $item['postopts'];
1186                 } else {
1187                         $postopts = "";
1188                 }
1189
1190                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1191
1192                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1193
1194                 if (sizeof($languages) > 0) {
1195                         if ($postopts != '') {
1196                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1197                         }
1198
1199                         $postopts .= 'lang=';
1200                         $sep = "";
1201
1202                         foreach ($languages as $language => $score) {
1203                                 $postopts .= $sep . $language . ";" . $score;
1204                                 $sep = ':';
1205                         }
1206                         $item['postopts'] = $postopts;
1207                 }
1208         }
1209
1210         /**
1211          * @brief Creates an unique guid out of a given uri
1212          *
1213          * @param string $uri uri of an item entry
1214          * @param string $host hostname for the GUID prefix
1215          * @return string unique guid
1216          */
1217         public static function guidFromUri($uri, $host)
1218         {
1219                 // Our regular guid routine is using this kind of prefix as well
1220                 // We have to avoid that different routines could accidentally create the same value
1221                 $parsed = parse_url($uri);
1222
1223                 // We use a hash of the hostname as prefix for the guid
1224                 $guid_prefix = hash("crc32", $host);
1225
1226                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1227                 unset($parsed["scheme"]);
1228
1229                 // Glue it together to be able to make a hash from it
1230                 $host_id = implode("/", $parsed);
1231
1232                 // We could use any hash algorithm since it isn't a security issue
1233                 $host_hash = hash("ripemd128", $host_id);
1234
1235                 return $guid_prefix.$host_hash;
1236         }
1237
1238         /**
1239          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1240          *
1241          * This can be used to filter for inactive contacts.
1242          * Only do this for public postings to avoid privacy problems, since poco data is public.
1243          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1244          *
1245          * @param array $arr Contains the just posted item record
1246          */
1247         private static function updateContact($arr)
1248         {
1249                 // Unarchive the author
1250                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1251                 if (DBM::is_result($contact)) {
1252                         Contact::unmarkForArchival($contact);
1253                 }
1254
1255                 // Unarchive the contact if it's not our own contact
1256                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1257                 if (DBM::is_result($contact)) {
1258                         Contact::unmarkForArchival($contact);
1259                 }
1260
1261                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1262
1263                 // Is it a forum? Then we don't care about the rules from above
1264                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1265                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1266                                 $update = true;
1267                         }
1268                 }
1269
1270                 if ($update) {
1271                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1272                                 ['id' => $arr['contact-id']]);
1273                 }
1274                 // Now do the same for the system wide contacts with uid=0
1275                 if (!$arr['private']) {
1276                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1277                                 ['id' => $arr['owner-id']]);
1278
1279                         if ($arr['owner-id'] != $arr['author-id']) {
1280                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1281                                         ['id' => $arr['author-id']]);
1282                         }
1283                 }
1284         }
1285
1286         public static function setHashtags(&$item)
1287         {
1288
1289                 $tags = get_tags($item["body"]);
1290
1291                 // No hashtags?
1292                 if (!count($tags)) {
1293                         return false;
1294                 }
1295
1296                 // This sorting is important when there are hashtags that are part of other hashtags
1297                 // Otherwise there could be problems with hashtags like #test and #test2
1298                 rsort($tags);
1299
1300                 $URLSearchString = "^\[\]";
1301
1302                 // All hashtags should point to the home server if "local_tags" is activated
1303                 if (Config::get('system', 'local_tags')) {
1304                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1305                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1306
1307                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1308                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1309                 }
1310
1311                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1312                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1313                         function ($match) {
1314                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1315                         }, $item["body"]);
1316
1317                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1318                         function ($match) {
1319                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1320                         }, $item["body"]);
1321
1322                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1323                         function ($match) {
1324                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1325                         }, $item["body"]);
1326
1327                 // Repair recursive urls
1328                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1329                                 "&num;$2", $item["body"]);
1330
1331                 foreach ($tags as $tag) {
1332                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1333                                 continue;
1334                         }
1335
1336                         $basetag = str_replace('_',' ',substr($tag,1));
1337
1338                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1339
1340                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1341
1342                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1343                                 if (strlen($item["tag"])) {
1344                                         $item["tag"] = ','.$item["tag"];
1345                                 }
1346                                 $item["tag"] = $newtag.$item["tag"];
1347                         }
1348                 }
1349
1350                 // Convert back the masked hashtags
1351                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1352         }
1353
1354         public static function getGuidById($id)
1355         {
1356                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1357                 if (DBM::is_result($item)) {
1358                         return $item['guid'];
1359                 } else {
1360                         return '';
1361                 }
1362         }
1363
1364         public static function getIdAndNickByGuid($guid, $uid = 0)
1365         {
1366                 $nick = "";
1367                 $id = 0;
1368
1369                 if ($uid == 0) {
1370                         $uid == local_user();
1371                 }
1372
1373                 // Does the given user have this item?
1374                 if ($uid) {
1375                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1376                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1377                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1378                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1379                         if (DBM::is_result($item)) {
1380                                 $id = $item["id"];
1381                                 $nick = $item["nickname"];
1382                         }
1383                 }
1384
1385                 // Or is it anywhere on the server?
1386                 if ($nick == "") {
1387                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1388                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1389                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1390                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1391                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1392                                         AND NOT `item`.`private` AND `item`.`wall`
1393                                         AND `item`.`guid` = ?", $guid);
1394                         if (DBM::is_result($item)) {
1395                                 $id = $item["id"];
1396                                 $nick = $item["nickname"];
1397                         }
1398                 }
1399                 return ["nick" => $nick, "id" => $id];
1400         }
1401
1402         /**
1403          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1404          * @param int $uid
1405          * @param int $item_id
1406          * @return bool true if item was deleted, else false
1407          */
1408         private static function tagDeliver($uid, $item_id)
1409         {
1410                 $mention = false;
1411
1412                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1413                 if (!DBM::is_result($user)) {
1414                         return;
1415                 }
1416
1417                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1418                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1419
1420                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1421                 if (!DBM::is_result($item)) {
1422                         return;
1423                 }
1424
1425                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1426
1427                 /*
1428                  * Diaspora uses their own hardwired link URL in @-tags
1429                  * instead of the one we supply with webfinger
1430                  */
1431                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1432
1433                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1434                 if ($cnt) {
1435                         foreach ($matches as $mtch) {
1436                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1437                                         $mention = true;
1438                                         logger('mention found: ' . $mtch[2]);
1439                                 }
1440                         }
1441                 }
1442
1443                 if (!$mention) {
1444                         if (($community_page || $prvgroup) &&
1445                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1446                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1447                                 // delete it!
1448                                 logger("no-mention top-level post to community or private group. delete.");
1449                                 dba::delete('item', ['id' => $item_id]);
1450                                 return true;
1451                         }
1452                         return;
1453                 }
1454
1455                 $arr = ['item' => $item, 'user' => $user];
1456
1457                 Addon::callHooks('tagged', $arr);
1458
1459                 if (!$community_page && !$prvgroup) {
1460                         return;
1461                 }
1462
1463                 /*
1464                  * tgroup delivery - setup a second delivery chain
1465                  * prevent delivery looping - only proceed
1466                  * if the message originated elsewhere and is a top-level post
1467                  */
1468                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1469                         return;
1470                 }
1471
1472                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1473                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1474                 if (!DBM::is_result($self)) {
1475                         return;
1476                 }
1477
1478                 $owner_id = Contact::getIdForURL($self['url']);
1479
1480                 // also reset all the privacy bits to the forum default permissions
1481
1482                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1483
1484                 $forum_mode = ($prvgroup ? 2 : 1);
1485
1486                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1487                         'owner-id' => $owner_id, 'owner-name' => $self['name'], 'owner-link' => $self['url'],
1488                         'owner-avatar' => $self['thumb'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1489                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1490                 dba::update('item', $fields, ['id' => $item_id]);
1491
1492                 self::updateThread($item_id);
1493
1494                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
1495         }
1496
1497         public static function isRemoteSelf($contact, &$datarray)
1498         {
1499                 $a = get_app();
1500
1501                 if (!$contact['remote_self']) {
1502                         return false;
1503                 }
1504
1505                 // Prevent the forwarding of posts that are forwarded
1506                 if ($datarray["extid"] == NETWORK_DFRN) {
1507                         logger('Already forwarded', LOGGER_DEBUG);
1508                         return false;
1509                 }
1510
1511                 // Prevent to forward already forwarded posts
1512                 if ($datarray["app"] == $a->get_hostname()) {
1513                         logger('Already forwarded (second test)', LOGGER_DEBUG);
1514                         return false;
1515                 }
1516
1517                 // Only forward posts
1518                 if ($datarray["verb"] != ACTIVITY_POST) {
1519                         logger('No post', LOGGER_DEBUG);
1520                         return false;
1521                 }
1522
1523                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
1524                         logger('Not public', LOGGER_DEBUG);
1525                         return false;
1526                 }
1527
1528                 $datarray2 = $datarray;
1529                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
1530                 if ($contact['remote_self'] == 2) {
1531                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1532                                         ['uid' => $contact['uid'], 'self' => true]);
1533                         if (DBM::is_result($self)) {
1534                                 $datarray['contact-id'] = $self["id"];
1535
1536                                 $datarray['owner-name'] = $self["name"];
1537                                 $datarray['owner-link'] = $self["url"];
1538                                 $datarray['owner-avatar'] = $self["thumb"];
1539
1540                                 $datarray['author-name']   = $datarray['owner-name'];
1541                                 $datarray['author-link']   = $datarray['owner-link'];
1542                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
1543
1544                                 unset($datarray['created']);
1545                                 unset($datarray['edited']);
1546
1547                                 unset($datarray['network']);
1548                                 unset($datarray['owner-id']);
1549                                 unset($datarray['author-id']);
1550                         }
1551
1552                         if ($contact['network'] != NETWORK_FEED) {
1553                                 $datarray["guid"] = get_guid(32);
1554                                 unset($datarray["plink"]);
1555                                 $datarray["uri"] = item_new_uri($a->get_hostname(), $contact['uid'], $datarray["guid"]);
1556                                 $datarray["parent-uri"] = $datarray["uri"];
1557                                 $datarray["thr-parent"] = $datarray["uri"];
1558                                 $datarray["extid"] = NETWORK_DFRN;
1559                                 $urlpart = parse_url($datarray2['author-link']);
1560                                 $datarray["app"] = $urlpart["host"];
1561                         } else {
1562                                 $datarray['private'] = 0;
1563                         }
1564                 }
1565
1566                 if ($contact['network'] != NETWORK_FEED) {
1567                         // Store the original post
1568                         $result = self::insert($datarray2, false, false);
1569                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
1570                 } else {
1571                         $datarray["app"] = "Feed";
1572                         $result = true;
1573                 }
1574
1575                 // Trigger automatic reactions for addons
1576                 $datarray['api_source'] = true;
1577
1578                 // We have to tell the hooks who we are - this really should be improved
1579                 $_SESSION["authenticated"] = true;
1580                 $_SESSION["uid"] = $contact['uid'];
1581
1582                 return $result;
1583         }
1584
1585         /**
1586          *
1587          * @param string $s
1588          * @param int    $uid
1589          * @param array  $item
1590          * @param int    $cid
1591          * @return string
1592          */
1593         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
1594         {
1595                 if (Config::get('system', 'disable_embedded')) {
1596                         return $s;
1597                 }
1598
1599                 logger('check for photos', LOGGER_DEBUG);
1600                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
1601
1602                 $orig_body = $s;
1603                 $new_body = '';
1604
1605                 $img_start = strpos($orig_body, '[img');
1606                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1607                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1608
1609                 while (($img_st_close !== false) && ($img_len !== false)) {
1610                         $img_st_close++; // make it point to AFTER the closing bracket
1611                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
1612
1613                         logger('found photo ' . $image, LOGGER_DEBUG);
1614
1615                         if (stristr($image, $site . '/photo/')) {
1616                                 // Only embed locally hosted photos
1617                                 $replace = false;
1618                                 $i = basename($image);
1619                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
1620                                 $x = strpos($i, '-');
1621
1622                                 if ($x) {
1623                                         $res = substr($i, $x + 1);
1624                                         $i = substr($i, 0, $x);
1625                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
1626                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
1627                                         if (DBM::is_result($photo)) {
1628                                                 /*
1629                                                  * Check to see if we should replace this photo link with an embedded image
1630                                                  * 1. No need to do so if the photo is public
1631                                                  * 2. If there's a contact-id provided, see if they're in the access list
1632                                                  *    for the photo. If so, embed it.
1633                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
1634                                                  *    permissions, regardless of order but first check to see if they're an exact
1635                                                  *    match to save some processing overhead.
1636                                                  */
1637                                                 if (self::hasPermissions($photo)) {
1638                                                         if ($cid) {
1639                                                                 $recips = self::enumeratePermissions($photo);
1640                                                                 if (in_array($cid, $recips)) {
1641                                                                         $replace = true;
1642                                                                 }
1643                                                         } elseif ($item) {
1644                                                                 if (self::samePermissions($item, $photo)) {
1645                                                                         $replace = true;
1646                                                                 }
1647                                                         }
1648                                                 }
1649                                                 if ($replace) {
1650                                                         $data = $photo['data'];
1651                                                         $type = $photo['type'];
1652
1653                                                         // If a custom width and height were specified, apply before embedding
1654                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
1655                                                                 logger('scaling photo', LOGGER_DEBUG);
1656
1657                                                                 $width = intval($match[1]);
1658                                                                 $height = intval($match[2]);
1659
1660                                                                 $Image = new Image($data, $type);
1661                                                                 if ($Image->isValid()) {
1662                                                                         $Image->scaleDown(max($width, $height));
1663                                                                         $data = $Image->asString();
1664                                                                         $type = $Image->getType();
1665                                                                 }
1666                                                         }
1667
1668                                                         logger('replacing photo', LOGGER_DEBUG);
1669                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
1670                                                         logger('replaced: ' . $image, LOGGER_DATA);
1671                                                 }
1672                                         }
1673                                 }
1674                         }
1675
1676                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
1677                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
1678                         if ($orig_body === false) {
1679                                 $orig_body = '';
1680                         }
1681
1682                         $img_start = strpos($orig_body, '[img');
1683                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1684                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1685                 }
1686
1687                 $new_body = $new_body . $orig_body;
1688
1689                 return $new_body;
1690         }
1691
1692         private static function hasPermissions($obj)
1693         {
1694                 return (
1695                         (
1696                                 x($obj, 'allow_cid')
1697                         ) || (
1698                                 x($obj, 'allow_gid')
1699                         ) || (
1700                                 x($obj, 'deny_cid')
1701                         ) || (
1702                                 x($obj, 'deny_gid')
1703                         )
1704                 );
1705         }
1706
1707         private static function samePermissions($obj1, $obj2)
1708         {
1709                 // first part is easy. Check that these are exactly the same.
1710                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
1711                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
1712                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
1713                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
1714                         return true;
1715                 }
1716
1717                 // This is harder. Parse all the permissions and compare the resulting set.
1718                 $recipients1 = self::enumeratePermissions($obj1);
1719                 $recipients2 = self::enumeratePermissions($obj2);
1720                 sort($recipients1);
1721                 sort($recipients2);
1722
1723                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
1724                 return ($recipients1 == $recipients2);
1725         }
1726
1727         // returns an array of contact-ids that are allowed to see this object
1728         private static function enumeratePermissions($obj)
1729         {
1730                 $allow_people = expand_acl($obj['allow_cid']);
1731                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
1732                 $deny_people  = expand_acl($obj['deny_cid']);
1733                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
1734                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
1735                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
1736                 $recipients   = array_diff($recipients, $deny);
1737                 return $recipients;
1738         }
1739
1740         public static function getFeedTags($item)
1741         {
1742                 $ret = [];
1743                 $matches = false;
1744                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1745                 if ($cnt) {
1746                         for ($x = 0; $x < $cnt; $x ++) {
1747                                 if ($matches[1][$x]) {
1748                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
1749                                 }
1750                         }
1751                 }
1752                 $matches = false;
1753                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1754                 if ($cnt) {
1755                         for ($x = 0; $x < $cnt; $x ++) {
1756                                 if ($matches[1][$x]) {
1757                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
1758                                 }
1759                         }
1760                 }
1761                 return $ret;
1762         }
1763
1764         public static function expire($uid, $days, $network = "", $force = false)
1765         {
1766                 if (!$uid || ($days < 1)) {
1767                         return;
1768                 }
1769
1770                 /*
1771                  * $expire_network_only = save your own wall posts
1772                  * and just expire conversations started by others
1773                  */
1774                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
1775                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
1776
1777                 if ($network != "") {
1778                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
1779
1780                         /*
1781                          * There is an index "uid_network_received" but not "uid_network_created"
1782                          * This avoids the creation of another index just for one purpose.
1783                          * And it doesn't really matter wether to look at "received" or "created"
1784                          */
1785                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1786                 } else {
1787                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1788                 }
1789
1790                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
1791                         WHERE `uid` = %d $range
1792                         AND `id` = `parent`
1793                         $sql_extra
1794                         AND `deleted` = 0",
1795                         intval($uid),
1796                         intval($days)
1797                 );
1798
1799                 if (!DBM::is_result($r)) {
1800                         return;
1801                 }
1802
1803                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
1804
1805                 // Forcing expiring of items - but not notes and marked items
1806                 if ($force) {
1807                         $expire_items = true;
1808                 }
1809
1810                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
1811                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
1812                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
1813
1814                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
1815
1816                 foreach ($r as $item) {
1817
1818                         // don't expire filed items
1819
1820                         if (strpos($item['file'],'[') !== false) {
1821                                 continue;
1822                         }
1823
1824                         // Only expire posts, not photos and photo comments
1825
1826                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
1827                                 continue;
1828                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
1829                                 continue;
1830                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
1831                                 continue;
1832                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
1833                                 continue;
1834                         }
1835
1836                         self::deleteById($item['id'], PRIORITY_LOW);
1837                 }
1838         }
1839
1840         public static function firstPostDate($uid, $wall = false)
1841         {
1842                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
1843                 $params = ['order' => ['created' => false]];
1844                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
1845                 if (DBM::is_result($thread)) {
1846                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
1847                 }
1848                 return false;
1849         }
1850
1851         /**
1852          * @brief add/remove activity to an item
1853          *
1854          * Toggle activities as like,dislike,attend of an item
1855          *
1856          * @param string $item_id
1857          * @param string $verb
1858          *              Activity verb. One of
1859          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
1860          *                      attendno, unattendno, attendmaybe, unattendmaybe
1861          * @hook 'post_local_end'
1862          *              array $arr
1863          *                      'post_id' => ID of posted item
1864          */
1865         public static function performLike($item_id, $verb)
1866         {
1867                 if (!local_user() && !remote_user()) {
1868                         return false;
1869                 }
1870
1871                 switch ($verb) {
1872                         case 'like':
1873                         case 'unlike':
1874                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
1875                                 $activity = ACTIVITY_LIKE;
1876                                 break;
1877                         case 'dislike':
1878                         case 'undislike':
1879                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
1880                                 $activity = ACTIVITY_DISLIKE;
1881                                 break;
1882                         case 'attendyes':
1883                         case 'unattendyes':
1884                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
1885                                 $activity = ACTIVITY_ATTEND;
1886                                 break;
1887                         case 'attendno':
1888                         case 'unattendno':
1889                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
1890                                 $activity = ACTIVITY_ATTENDNO;
1891                                 break;
1892                         case 'attendmaybe':
1893                         case 'unattendmaybe':
1894                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
1895                                 $activity = ACTIVITY_ATTENDMAYBE;
1896                                 break;
1897                         default:
1898                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
1899                                 return false;
1900                 }
1901
1902                 // Enable activity toggling instead of on/off
1903                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
1904
1905                 logger('like: verb ' . $verb . ' item ' . $item_id);
1906
1907                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
1908                 if (!DBM::is_result($item)) {
1909                         logger('like: unknown item ' . $item_id);
1910                         return false;
1911                 }
1912
1913                 $uid = $item['uid'];
1914                 if (($uid == 0) && local_user()) {
1915                         $uid = local_user();
1916                 }
1917
1918                 if (!can_write_wall($uid)) {
1919                         logger('like: unable to write on wall ' . $uid);
1920                         return false;
1921                 }
1922
1923                 // Retrieves the local post owner
1924                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
1925                 if (!DBM::is_result($owner_self_contact)) {
1926                         logger('like: unknown owner ' . $uid);
1927                         return false;
1928                 }
1929
1930                 // Retrieve the current logged in user's public contact
1931                 $author_id = public_contact();
1932
1933                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
1934                 if (!DBM::is_result($author_contact)) {
1935                         logger('like: unknown author ' . $author_id);
1936                         return false;
1937                 }
1938
1939                 // Contact-id is the uid-dependant author contact
1940                 if (local_user() == $uid) {
1941                         $item_contact_id = $owner_self_contact['id'];
1942                         $item_contact = $owner_self_contact;
1943                 } else {
1944                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
1945                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
1946                         if (!DBM::is_result($item_contact)) {
1947                                 logger('like: unknown item contact ' . $item_contact_id);
1948                                 return false;
1949                         }
1950                 }
1951
1952                 // Look for an existing verb row
1953                 // event participation are essentially radio toggles. If you make a subsequent choice,
1954                 // we need to eradicate your first choice.
1955                 if ($event_verb_flag) {
1956                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
1957                 } else {
1958                         $verbs = "'".dbesc($activity)."'";
1959                 }
1960
1961                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
1962                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
1963                         WHERE `verb` IN ($verbs)
1964                         AND `deleted` = 0
1965                         AND `author-id` = %d
1966                         AND `uid` = %d
1967                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
1968                         LIMIT 1",
1969                         intval($author_contact['id']),
1970                         intval($item['uid']),
1971                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
1972                 );
1973
1974                 // If it exists, mark it as deleted
1975                 if (DBM::is_result($existing_like)) {
1976                         $like_item = $existing_like[0];
1977
1978                         // Already voted, undo it
1979                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
1980                         dba::update('item', $fields, ['id' => $like_item['id']]);
1981
1982                         // Clean up the Diaspora signatures for this like
1983                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
1984                         // if it had been enabled in the past
1985                         dba::delete('sign', ['iid' => $like_item['id']]);
1986
1987                         $like_item_id = $like_item['id'];
1988                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
1989
1990                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
1991                                 return true;
1992                         }
1993                 }
1994
1995                 // Verb is "un-something", just trying to delete existing entries
1996                 if (strpos($verb, 'un') === 0) {
1997                         return true;
1998                 }
1999
2000                 // Else or if event verb different from existing row, create a new item row
2001                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2002                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2003                         $post_type = L10n::t('event');
2004                 }
2005                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2006                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2007                 $body = $item['body'];
2008
2009                 $obj = <<< EOT
2010
2011                 <object>
2012                         <type>$objtype</type>
2013                         <local>1</local>
2014                         <id>{$item['uri']}</id>
2015                         <link>$link</link>
2016                         <title></title>
2017                         <content>$body</content>
2018                 </object>
2019 EOT;
2020
2021                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2022                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2023                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2024
2025                 $new_item = [
2026                         'guid'          => get_guid(32),
2027                         'uri'           => item_new_uri(self::getApp()->get_hostname(), $item['uid']),
2028                         'uid'           => $item['uid'],
2029                         'contact-id'    => $item_contact_id,
2030                         'type'          => 'activity',
2031                         'wall'          => $item['wall'],
2032                         'origin'        => 1,
2033                         'gravity'       => GRAVITY_LIKE,
2034                         'parent'        => $item['id'],
2035                         'parent-uri'    => $item['uri'],
2036                         'thr-parent'    => $item['uri'],
2037                         'owner-id'      => $item['owner-id'],
2038                         'owner-name'    => $item['owner-name'],
2039                         'owner-link'    => $item['owner-link'],
2040                         'owner-avatar'  => $item['owner-avatar'],
2041                         'author-id'     => $author_contact['id'],
2042                         'author-name'   => $author_contact['name'],
2043                         'author-link'   => $author_contact['url'],
2044                         'author-avatar' => $author_contact['thumb'],
2045                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2046                         'verb'          => $activity,
2047                         'object-type'   => $objtype,
2048                         'object'        => $obj,
2049                         'allow_cid'     => $item['allow_cid'],
2050                         'allow_gid'     => $item['allow_gid'],
2051                         'deny_cid'      => $item['deny_cid'],
2052                         'deny_gid'      => $item['deny_gid'],
2053                         'visible'       => 1,
2054                         'unseen'        => 1,
2055                 ];
2056
2057                 $new_item_id = self::insert($new_item);
2058
2059                 // If the parent item isn't visible then set it to visible
2060                 if (!$item['visible']) {
2061                         self::update(['visible' => true], ['id' => $item['id']]);
2062                 }
2063
2064                 // Save the author information for the like in case we need to relay to Diaspora
2065                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2066
2067                 $new_item['id'] = $new_item_id;
2068
2069                 Addon::callHooks('post_local_end', $new_item);
2070
2071                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2072
2073                 return true;
2074         }
2075
2076         private static function addThread($itemid, $onlyshadow = false)
2077         {
2078                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2079                         'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
2080                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2081                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2082                 $item = dba::selectFirst('item', $fields, $condition);
2083
2084                 if (!DBM::is_result($item)) {
2085                         return;
2086                 }
2087
2088                 $item['iid'] = $itemid;
2089
2090                 if (!$onlyshadow) {
2091                         $result = dba::insert('thread', $item);
2092
2093                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2094                 }
2095         }
2096
2097         private static function updateThread($itemid, $setmention = false)
2098         {
2099                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
2100                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
2101                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id', 'rendered-html', 'rendered-hash'];
2102                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2103
2104                 $item = dba::selectFirst('item', $fields, $condition);
2105                 if (!DBM::is_result($item)) {
2106                         return;
2107                 }
2108
2109                 if ($setmention) {
2110                         $item["mention"] = 1;
2111                 }
2112
2113                 $sql = "";
2114
2115                 $fields = [];
2116
2117                 foreach ($item as $field => $data) {
2118                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
2119                                 $fields[$field] = $data;
2120                         }
2121                 }
2122
2123                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2124
2125                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2126
2127                 // Updating a shadow item entry
2128                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
2129
2130                 if (!DBM::is_result($items)) {
2131                         return;
2132                 }
2133
2134                 $fields = ['title' => $item['title'], 'body' => $item['body'],
2135                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2136                 $result = dba::update('item', $fields, ['id' => $items['id']]);
2137
2138                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
2139         }
2140
2141         private static function deleteThread($itemid, $itemuri = "")
2142         {
2143                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2144                 if (!DBM::is_result($item)) {
2145                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2146                         return;
2147                 }
2148
2149                 // Using dba::delete at this time could delete the associated item entries
2150                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2151
2152                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2153
2154                 if ($itemuri != "") {
2155                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2156                         if (!dba::exists('item', $condition)) {
2157                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2158                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2159                         }
2160                 }
2161         }
2162 }