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                 //unset($item['author-link']);
 570                 //unset($item['author-name']);
 571                 //unset($item['author-avatar']);
 572
 573                 //unset($item['owner-link']);
 574                 unset($item['owner-name']);
 575                 unset($item['owner-avatar']);
 576
 577                 if ($item['network'] == NETWORK_PHANTOM) {
 578                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
 579
 580                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
 581                         if (!empty($contact['network'])) {
 582                                 $item['network'] = $contact["network"];
 583                         } else {
 584                                 $item['network'] = NETWORK_DFRN;
 585                         }
 586                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
 587                 }
 588
 589                 // Checking if there is already an item with the same guid
 590                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
 591                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 592                 if (dba::exists('item', $condition)) {
 593                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
 594                         return 0;
 595                 }
 596
 597                 // Check for hashtags in the body and repair or add hashtag links
 598                 self::setHashtags($item);
 599
 600                 $item['thr-parent'] = $item['parent-uri'];
 601
 602                 $notify_type = '';
 603                 $allow_cid = '';
 604                 $allow_gid = '';
 605                 $deny_cid  = '';
 606                 $deny_gid  = '';
 607
 608                 if ($item['parent-uri'] === $item['uri']) {
 609                         $parent_id = 0;
 610                         $parent_deleted = 0;
 611                         $allow_cid = $item['allow_cid'];
 612                         $allow_gid = $item['allow_gid'];
 613                         $deny_cid  = $item['deny_cid'];
 614                         $deny_gid  = $item['deny_gid'];
 615                         $notify_type = 'wall-new';
 616                 } else {
 617                         // find the parent and snarf the item id and ACLs
 618                         // and anything else we need to inherit
 619
 620                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
 621                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 622                                 'wall', 'private', 'forum_mode', 'origin'];
 623                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
 624                         $params = ['order' => ['id' => false]];
 625                         $parent = dba::selectFirst('item', $fields, $condition, $params);
 626
 627                         if (DBM::is_result($parent)) {
 628                                 // is the new message multi-level threaded?
 629                                 // even though we don't support it now, preserve the info
 630                                 // and re-attach to the conversation parent.
 631
 632                                 if ($parent['uri'] != $parent['parent-uri']) {
 633                                         $item['parent-uri'] = $parent['parent-uri'];
 634
 635                                         $condition = ['uri' => $item['parent-uri'],
 636                                                 'parent-uri' => $item['parent-uri'],
 637                                                 'uid' => $item['uid']];
 638                                         $params = ['order' => ['id' => false]];
 639                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
 640
 641                                         if (DBM::is_result($toplevel_parent)) {
 642                                                 $parent = $toplevel_parent;
 643                                         }
 644                                 }
 645
 646                                 $parent_id      = $parent['id'];
 647                                 $parent_deleted = $parent['deleted'];
 648                                 $allow_cid      = $parent['allow_cid'];
 649                                 $allow_gid      = $parent['allow_gid'];
 650                                 $deny_cid       = $parent['deny_cid'];
 651                                 $deny_gid       = $parent['deny_gid'];
 652                                 $item['wall']    = $parent['wall'];
 653                                 $notify_type    = 'comment-new';
 654
 655                                 /*
 656                                  * If the parent is private, force privacy for the entire conversation
 657                                  * This differs from the above settings as it subtly allows comments from
 658                                  * email correspondents to be private even if the overall thread is not.
 659                                  */
 660                                 if ($parent['private']) {
 661                                         $item['private'] = $parent['private'];
 662                                 }
 663
 664                                 /*
 665                                  * Edge case. We host a public forum that was originally posted to privately.
 666                                  * The original author commented, but as this is a comment, the permissions
 667                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
 668                                  */
 669                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
 670                                         $item['private'] = 0;
 671                                 }
 672
 673                                 // If its a post from myself then tag the thread as "mention"
 674                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
 675                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
 676                                 if (DBM::is_result($user)) {
 677                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
 678                                         logger("'myself' is ".$self." for parent ".$parent_id." checking against ".$item['author-link']." and ".$item['owner-link'], LOGGER_DEBUG);
 679                                         if ((normalise_link($item['author-link']) == $self) || (normalise_link($item['owner-link']) == $self)) {
 680                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
 681                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
 682                                         }
 683                                 }
 684                         } else {
 685                                 /*
 686                                  * Allow one to see reply tweets from status.net even when
 687                                  * we don't have or can't see the original post.
 688                                  */
 689                                 if ($force_parent) {
 690                                         logger('$force_parent=true, reply converted to top-level post.');
 691                                         $parent_id = 0;
 692                                         $item['parent-uri'] = $item['uri'];
 693                                         $item['gravity'] = 0;
 694                                 } else {
 695                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
 696                                         return 0;
 697                                 }
 698
 699                                 $parent_deleted = 0;
 700                         }
 701                 }
 702
 703                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
 704                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
 705                 if (dba::exists('item', $condition)) {
 706                         logger('duplicated item with the same uri found. '.print_r($item,true));
 707                         return 0;
 708                 }
 709
 710                 // On Friendica and Diaspora the GUID is unique
 711                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
 712                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 713                         if (dba::exists('item', $condition)) {
 714                                 logger('duplicated item with the same guid found. '.print_r($item,true));
 715                                 return 0;
 716                         }
 717                 } else {
 718                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 719                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 720                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 721                         if (dba::exists('item', $condition)) {
 722                                 logger('duplicated item with the same body found. '.print_r($item,true));
 723                                 return 0;
 724                         }
 725                 }
 726
 727                 // Is this item available in the global items (with uid=0)?
 728                 if ($item["uid"] == 0) {
 729                         $item["global"] = true;
 730
 731                         // Set the global flag on all items if this was a global item entry
 732                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
 733                 } else {
 734                         $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
 735                 }
 736
 737                 // ACL settings
 738                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
 739                         $private = 1;
 740                 } else {
 741                         $private = $item['private'];
 742                 }
 743
 744                 $item["allow_cid"] = $allow_cid;
 745                 $item["allow_gid"] = $allow_gid;
 746                 $item["deny_cid"] = $deny_cid;
 747                 $item["deny_gid"] = $deny_gid;
 748                 $item["private"] = $private;
 749                 $item["deleted"] = $parent_deleted;
 750
 751                 // Fill the cache field
 752                 put_item_in_cache($item);
 753
 754                 if ($notify) {
 755                         Addon::callHooks('post_local', $item);
 756                 } else {
 757                         Addon::callHooks('post_remote', $item);
 758                 }
 759
 760                 // This array field is used to trigger some automatic reactions
 761                 // It is mainly used in the "post_local" hook.
 762                 unset($item['api_source']);
 763
 764                 if (x($item, 'cancel')) {
 765                         logger('post cancelled by addon.');
 766                         return 0;
 767                 }
 768
 769                 /*
 770                  * Check for already added items.
 771                  * There is a timing issue here that sometimes creates double postings.
 772                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 773                  */
 774                 if ($item["uid"] == 0) {
 775                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
 776                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
 777                                 return 0;
 778                         }
 779                 }
 780
 781                 logger('' . print_r($item,true), LOGGER_DATA);
 782
 783                 dba::transaction();
 784                 $ret = dba::insert('item', $item);
 785
 786                 // When the item was successfully stored we fetch the ID of the item.
 787                 if (DBM::is_result($ret)) {
 788                         $current_post = dba::lastInsertId();
 789                 } else {
 790                         // This can happen - for example - if there are locking timeouts.
 791                         dba::rollback();
 792
 793                         // Store the data into a spool file so that we can try again later.
 794
 795                         // At first we restore the Diaspora signature that we removed above.
 796                         if (isset($encoded_signature)) {
 797                                 $item['dsprsig'] = $encoded_signature;
 798                         }
 799
 800                         // Now we store the data in the spool directory
 801                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 802                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
 803
 804                         $spoolpath = get_spoolpath();
 805                         if ($spoolpath != "") {
 806                                 $spool = $spoolpath.'/'.$file;
 807                                 file_put_contents($spool, json_encode($item));
 808                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
 809                         }
 810                         return 0;
 811                 }
 812
 813                 if ($current_post == 0) {
 814                         // This is one of these error messages that never should occur.
 815                         logger("couldn't find created item - we better quit now.");
 816                         dba::rollback();
 817                         return 0;
 818                 }
 819
 820                 // How much entries have we created?
 821                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
 822                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
 823
 824                 if ($entries > 1) {
 825                         // There are duplicates. We delete our just created entry.
 826                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
 827
 828                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
 829                         dba::delete('item', ['id' => $current_post]);
 830                         dba::commit();
 831                         return 0;
 832                 } elseif ($entries == 0) {
 833                         // This really should never happen since we quit earlier if there were problems.
 834                         logger("Something is terribly wrong. We haven't found our created entry.");
 835                         dba::rollback();
 836                         return 0;
 837                 }
 838
 839                 logger('created item '.$current_post);
 840                 self::updateContact($item);
 841
 842                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
 843                         $parent_id = $current_post;
 844                 }
 845
 846                 // Set parent id
 847                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
 848
 849                 $item['id'] = $current_post;
 850                 $item['parent'] = $parent_id;
 851
 852                 // update the commented timestamp on the parent
 853                 // Only update "commented" if it is really a comment
 854                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
 855                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 856                 } else {
 857                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 858                 }
 859
 860                 if ($dsprsig) {
 861                         /*
 862                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
 863                          * We can check for this condition when we decode and encode the stuff again.
 864                          */
 865                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
 866                                 $dsprsig->signature = base64_decode($dsprsig->signature);
 867                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
 868                         }
 869
 870                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
 871                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
 872                 }
 873
 874                 if (!empty($diaspora_signed_text)) {
 875                         // Formerly we stored the signed text, the signature and the author in different fields.
 876                         // We now store the raw data so that we are more flexible.
 877                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
 878                 }
 879
 880                 $deleted = self::tagDeliver($item['uid'], $current_post);
 881
 882                 /*
 883                  * current post can be deleted if is for a community page and no mention are
 884                  * in it.
 885                  */
 886                 if (!$deleted && !$dontcache) {
 887                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
 888                         if (DBM::is_result($posted_item)) {
 889                                 if ($notify) {
 890                                         Addon::callHooks('post_local_end', $posted_item);
 891                                 } else {
 892                                         Addon::callHooks('post_remote_end', $posted_item);
 893                                 }
 894                         } else {
 895                                 logger('new item not found in DB, id ' . $current_post);
 896                         }
 897                 }
 898
 899                 if ($item['parent-uri'] === $item['uri']) {
 900                         self::addThread($current_post);
 901                 } else {
 902                         self::updateThread($parent_id);
 903                 }
 904
 905                 dba::commit();
 906
 907                 /*
 908                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
 909                  * This is not perfect - but a workable solution until we found the reason for the problem.
 910                  */
 911                 Term::insertFromTagFieldByItemId($current_post);
 912                 Term::insertFromFileFieldByItemId($current_post);
 913
 914                 if ($item['parent-uri'] === $item['uri']) {
 915                         self::addShadow($current_post);
 916                 } else {
 917                         self::addShadowPost($current_post);
 918                 }
 919
 920                 check_user_notification($current_post);
 921
 922                 if ($notify) {
 923                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
 924                 } elseif (!empty($parent) && $parent['origin']) {
 925                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
 926                 }
 927
 928                 return $current_post;
 929         }
 930
 931         /**
 932          * @brief Distributes public items to the receivers
 933          *
 934          * @param integer $itemid      Item ID that should be added
 935          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
 936          */
 937         public static function distribute($itemid, $signed_text = '')
 938         {
 939                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
 940                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
 941                 if (!DBM::is_result($parent)) {
 942                         return;
 943                 }
 944
 945                 // Only distribute public items from native networks
 946                 $condition = ['id' => $itemid, 'uid' => 0,
 947                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
 948                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
 949                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
 950                 if (!DBM::is_result($item)) {
 951                         return;
 952                 }
 953
 954                 unset($item['id']);
 955                 unset($item['parent']);
 956                 unset($item['mention']);
 957                 unset($item['wall']);
 958                 unset($item['origin']);
 959                 unset($item['starred']);
 960                 unset($item['rendered-hash']);
 961                 unset($item['rendered-html']);
 962
 963                 $users = [];
 964
 965                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
 966                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
 967                 $contacts = dba::select('contact', ['uid'], $condition);
 968                 while ($contact = dba::fetch($contacts)) {
 969                         $users[$contact['uid']] = $contact['uid'];
 970                 }
 971
 972                 $origin_uid = 0;
 973
 974                 if ($item['uri'] != $item['parent-uri']) {
 975                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
 976                         while ($parent = dba::fetch($parents)) {
 977                                 $users[$parent['uid']] = $parent['uid'];
 978                                 if ($parent['origin'] && !$item['origin']) {
 979                                         $origin_uid = $parent['uid'];
 980                                 }
 981                         }
 982                 }
 983
 984                 foreach ($users as $uid) {
 985                         if ($origin_uid == $uid) {
 986                                 $item['diaspora_signed_text'] = $signed_text;
 987                         }
 988                         self::storeForUser($itemid, $item, $uid);
 989                 }
 990         }
 991
 992         /**
 993          * @brief Store public items for the receivers
 994          *
 995          * @param integer $itemid Item ID that should be added
 996          * @param array   $item   The item entry that will be stored
 997          * @param integer $uid    The user that will receive the item entry
 998          */
 999         private static function storeForUser($itemid, $item, $uid)
1000         {
1001                 $item['uid'] = $uid;
1002                 $item['origin'] = 0;
1003                 $item['wall'] = 0;
1004                 if ($item['uri'] == $item['parent-uri']) {
1005                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1006                 } else {
1007                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1008                 }
1009
1010                 if (empty($item['contact-id'])) {
1011                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1012                         if (!DBM::is_result($self)) {
1013                                 return;
1014                         }
1015                         $item['contact-id'] = $self['id'];
1016                 }
1017
1018                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1019                         $item['type'] = 'remote-comment';
1020                 } elseif ($item['type'] == 'wall') {
1021                         $item['type'] = 'remote';
1022                 }
1023
1024                 /// @todo Handling of "event-id"
1025
1026                 $notify = false;
1027                 if ($item['uri'] == $item['parent-uri']) {
1028                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1029                         if (DBM::is_result($contact)) {
1030                                 $notify = self::isRemoteSelf($contact, $item);
1031                         }
1032                 }
1033
1034                 $distributed = self::insert($item, false, $notify, true);
1035
1036                 if (!$distributed) {
1037                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1038                 } else {
1039                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1040                 }
1041         }
1042
1043         /**
1044          * @brief Add a shadow entry for a given item id that is a thread starter
1045          *
1046          * We store every public item entry additionally with the user id "0".
1047          * This is used for the community page and for the search.
1048          * It is planned that in the future we will store public item entries only once.
1049          *
1050          * @param integer $itemid Item ID that should be added
1051          */
1052         public static function addShadow($itemid)
1053         {
1054                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1055                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1056                 $item = dba::selectFirst('item', $fields, $condition);
1057
1058                 if (!DBM::is_result($item)) {
1059                         return;
1060                 }
1061
1062                 // is it already a copy?
1063                 if (($itemid == 0) || ($item['uid'] == 0)) {
1064                         return;
1065                 }
1066
1067                 // Is it a visible public post?
1068                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1069                         return;
1070                 }
1071
1072                 // is it an entry from a connector? Only add an entry for natively connected networks
1073                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1074                         return;
1075                 }
1076
1077                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1078
1079                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1080                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1081
1082                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1083                                 // Preparing public shadow (removing user specific data)
1084                                 $item['uid'] = 0;
1085                                 unset($item['id']);
1086                                 unset($item['parent']);
1087                                 unset($item['wall']);
1088                                 unset($item['mention']);
1089                                 unset($item['origin']);
1090                                 unset($item['starred']);
1091                                 unset($item['rendered-hash']);
1092                                 unset($item['rendered-html']);
1093                                 if ($item['uri'] == $item['parent-uri']) {
1094                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1095                                 } else {
1096                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1097                                 }
1098
1099                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1100                                         $item['type'] = 'remote-comment';
1101                                 } elseif ($item['type'] == 'wall') {
1102                                         $item['type'] = 'remote';
1103                                 }
1104
1105                                 $public_shadow = self::insert($item, false, false, true);
1106
1107                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1108                         }
1109                 }
1110         }
1111
1112         /**
1113          * @brief Add a shadow entry for a given item id that is a comment
1114          *
1115          * This function does the same like the function above - but for comments
1116          *
1117          * @param integer $itemid Item ID that should be added
1118          */
1119         public static function addShadowPost($itemid)
1120         {
1121                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1122                 if (!DBM::is_result($item)) {
1123                         return;
1124                 }
1125
1126                 // Is it a toplevel post?
1127                 if ($item['id'] == $item['parent']) {
1128                         self::addShadow($itemid);
1129                         return;
1130                 }
1131
1132                 // Is this a shadow entry?
1133                 if ($item['uid'] == 0) {
1134                         return;
1135                 }
1136
1137                 // Is there a shadow parent?
1138                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1139                         return;
1140                 }
1141
1142                 // Is there already a shadow entry?
1143                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1144                         return;
1145                 }
1146
1147                 // Save "origin" and "parent" state
1148                 $origin = $item['origin'];
1149                 $parent = $item['parent'];
1150
1151                 // Preparing public shadow (removing user specific data)
1152                 $item['uid'] = 0;
1153                 unset($item['id']);
1154                 unset($item['parent']);
1155                 unset($item['wall']);
1156                 unset($item['mention']);
1157                 unset($item['origin']);
1158                 unset($item['starred']);
1159                 unset($item['rendered-hash']);
1160                 unset($item['rendered-html']);
1161                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1162
1163                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1164                         $item['type'] = 'remote-comment';
1165                 } elseif ($item['type'] == 'wall') {
1166                         $item['type'] = 'remote';
1167                 }
1168
1169                 $public_shadow = self::insert($item, false, false, true);
1170
1171                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1172
1173                 // If this was a comment to a Diaspora post we don't get our comment back.
1174                 // This means that we have to distribute the comment by ourselves.
1175                 if ($origin && dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1176                         self::distribute($public_shadow);
1177                 }
1178         }
1179
1180          /**
1181          * Adds a "lang" specification in a "postopts" element of given $arr,
1182          * if possible and not already present.
1183          * Expects "body" element to exist in $arr.
1184          */
1185         private static function addLanguageInPostopts(&$item)
1186         {
1187                 $postopts = "";
1188
1189                 if (!empty($item['postopts'])) {
1190                         if (strstr($item['postopts'], 'lang=')) {
1191                                 // do not override
1192                                 return;
1193                         }
1194                         $postopts = $item['postopts'];
1195                 }
1196
1197                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1198
1199                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1200
1201                 if (sizeof($languages) > 0) {
1202                         if ($postopts != '') {
1203                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1204                         }
1205
1206                         $postopts .= 'lang=';
1207                         $sep = "";
1208
1209                         foreach ($languages as $language => $score) {
1210                                 $postopts .= $sep . $language . ";" . $score;
1211                                 $sep = ':';
1212                         }
1213                         $item['postopts'] = $postopts;
1214                 }
1215         }
1216
1217         /**
1218          * @brief Creates an unique guid out of a given uri
1219          *
1220          * @param string $uri uri of an item entry
1221          * @param string $host hostname for the GUID prefix
1222          * @return string unique guid
1223          */
1224         public static function guidFromUri($uri, $host)
1225         {
1226                 // Our regular guid routine is using this kind of prefix as well
1227                 // We have to avoid that different routines could accidentally create the same value
1228                 $parsed = parse_url($uri);
1229
1230                 // We use a hash of the hostname as prefix for the guid
1231                 $guid_prefix = hash("crc32", $host);
1232
1233                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1234                 unset($parsed["scheme"]);
1235
1236                 // Glue it together to be able to make a hash from it
1237                 $host_id = implode("/", $parsed);
1238
1239                 // We could use any hash algorithm since it isn't a security issue
1240                 $host_hash = hash("ripemd128", $host_id);
1241
1242                 return $guid_prefix.$host_hash;
1243         }
1244
1245         /**
1246          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1247          *
1248          * This can be used to filter for inactive contacts.
1249          * Only do this for public postings to avoid privacy problems, since poco data is public.
1250          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1251          *
1252          * @param array $arr Contains the just posted item record
1253          */
1254         private static function updateContact($arr)
1255         {
1256                 // Unarchive the author
1257                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1258                 if (DBM::is_result($contact)) {
1259                         Contact::unmarkForArchival($contact);
1260                 }
1261
1262                 // Unarchive the contact if it's not our own contact
1263                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1264                 if (DBM::is_result($contact)) {
1265                         Contact::unmarkForArchival($contact);
1266                 }
1267
1268                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1269
1270                 // Is it a forum? Then we don't care about the rules from above
1271                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1272                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1273                                 $update = true;
1274                         }
1275                 }
1276
1277                 if ($update) {
1278                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1279                                 ['id' => $arr['contact-id']]);
1280                 }
1281                 // Now do the same for the system wide contacts with uid=0
1282                 if (!$arr['private']) {
1283                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1284                                 ['id' => $arr['owner-id']]);
1285
1286                         if ($arr['owner-id'] != $arr['author-id']) {
1287                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1288                                         ['id' => $arr['author-id']]);
1289                         }
1290                 }
1291         }
1292
1293         public static function setHashtags(&$item)
1294         {
1295
1296                 $tags = get_tags($item["body"]);
1297
1298                 // No hashtags?
1299                 if (!count($tags)) {
1300                         return false;
1301                 }
1302
1303                 // This sorting is important when there are hashtags that are part of other hashtags
1304                 // Otherwise there could be problems with hashtags like #test and #test2
1305                 rsort($tags);
1306
1307                 $URLSearchString = "^\[\]";
1308
1309                 // All hashtags should point to the home server if "local_tags" is activated
1310                 if (Config::get('system', 'local_tags')) {
1311                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1312                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1313
1314                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1315                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1316                 }
1317
1318                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1319                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1320                         function ($match) {
1321                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1322                         }, $item["body"]);
1323
1324                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1325                         function ($match) {
1326                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1327                         }, $item["body"]);
1328
1329                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1330                         function ($match) {
1331                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1332                         }, $item["body"]);
1333
1334                 // Repair recursive urls
1335                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1336                                 "&num;$2", $item["body"]);
1337
1338                 foreach ($tags as $tag) {
1339                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1340                                 continue;
1341                         }
1342
1343                         $basetag = str_replace('_',' ',substr($tag,1));
1344
1345                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1346
1347                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1348
1349                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1350                                 if (strlen($item["tag"])) {
1351                                         $item["tag"] = ','.$item["tag"];
1352                                 }
1353                                 $item["tag"] = $newtag.$item["tag"];
1354                         }
1355                 }
1356
1357                 // Convert back the masked hashtags
1358                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1359         }
1360
1361         public static function getGuidById($id)
1362         {
1363                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1364                 if (DBM::is_result($item)) {
1365                         return $item['guid'];
1366                 } else {
1367                         return '';
1368                 }
1369         }
1370
1371         public static function getIdAndNickByGuid($guid, $uid = 0)
1372         {
1373                 $nick = "";
1374                 $id = 0;
1375
1376                 if ($uid == 0) {
1377                         $uid == local_user();
1378                 }
1379
1380                 // Does the given user have this item?
1381                 if ($uid) {
1382                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1383                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1384                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1385                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1386                         if (DBM::is_result($item)) {
1387                                 $id = $item["id"];
1388                                 $nick = $item["nickname"];
1389                         }
1390                 }
1391
1392                 // Or is it anywhere on the server?
1393                 if ($nick == "") {
1394                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1395                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1396                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1397                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1398                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1399                                         AND NOT `item`.`private` AND `item`.`wall`
1400                                         AND `item`.`guid` = ?", $guid);
1401                         if (DBM::is_result($item)) {
1402                                 $id = $item["id"];
1403                                 $nick = $item["nickname"];
1404                         }
1405                 }
1406                 return ["nick" => $nick, "id" => $id];
1407         }
1408
1409         /**
1410          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1411          * @param int $uid
1412          * @param int $item_id
1413          * @return bool true if item was deleted, else false
1414          */
1415         private static function tagDeliver($uid, $item_id)
1416         {
1417                 $mention = false;
1418
1419                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1420                 if (!DBM::is_result($user)) {
1421                         return;
1422                 }
1423
1424                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1425                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1426
1427                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1428                 if (!DBM::is_result($item)) {
1429                         return;
1430                 }
1431
1432                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1433
1434                 /*
1435                  * Diaspora uses their own hardwired link URL in @-tags
1436                  * instead of the one we supply with webfinger
1437                  */
1438                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1439
1440                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1441                 if ($cnt) {
1442                         foreach ($matches as $mtch) {
1443                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1444                                         $mention = true;
1445                                         logger('mention found: ' . $mtch[2]);
1446                                 }
1447                         }
1448                 }
1449
1450                 if (!$mention) {
1451                         if (($community_page || $prvgroup) &&
1452                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1453                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1454                                 // delete it!
1455                                 logger("no-mention top-level post to community or private group. delete.");
1456                                 dba::delete('item', ['id' => $item_id]);
1457                                 return true;
1458                         }
1459                         return;
1460                 }
1461
1462                 $arr = ['item' => $item, 'user' => $user];
1463
1464                 Addon::callHooks('tagged', $arr);
1465
1466                 if (!$community_page && !$prvgroup) {
1467                         return;
1468                 }
1469
1470                 /*
1471                  * tgroup delivery - setup a second delivery chain
1472                  * prevent delivery looping - only proceed
1473                  * if the message originated elsewhere and is a top-level post
1474                  */
1475                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1476                         return;
1477                 }
1478
1479                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1480                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1481                 if (!DBM::is_result($self)) {
1482                         return;
1483                 }
1484
1485                 $owner_id = Contact::getIdForURL($self['url']);
1486
1487                 // also reset all the privacy bits to the forum default permissions
1488
1489                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1490
1491                 $forum_mode = ($prvgroup ? 2 : 1);
1492
1493                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1494                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1495                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1496                 dba::update('item', $fields, ['id' => $item_id]);
1497
1498                 self::updateThread($item_id);
1499
1500                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
1501         }
1502
1503         public static function isRemoteSelf($contact, &$datarray)
1504         {
1505                 $a = get_app();
1506
1507                 if (!$contact['remote_self']) {
1508                         return false;
1509                 }
1510
1511                 // Prevent the forwarding of posts that are forwarded
1512                 if ($datarray["extid"] == NETWORK_DFRN) {
1513                         logger('Already forwarded', LOGGER_DEBUG);
1514                         return false;
1515                 }
1516
1517                 // Prevent to forward already forwarded posts
1518                 if ($datarray["app"] == $a->get_hostname()) {
1519                         logger('Already forwarded (second test)', LOGGER_DEBUG);
1520                         return false;
1521                 }
1522
1523                 // Only forward posts
1524                 if ($datarray["verb"] != ACTIVITY_POST) {
1525                         logger('No post', LOGGER_DEBUG);
1526                         return false;
1527                 }
1528
1529                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
1530                         logger('Not public', LOGGER_DEBUG);
1531                         return false;
1532                 }
1533
1534                 $datarray2 = $datarray;
1535                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
1536                 if ($contact['remote_self'] == 2) {
1537                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1538                                         ['uid' => $contact['uid'], 'self' => true]);
1539                         if (DBM::is_result($self)) {
1540                                 $datarray['contact-id'] = $self["id"];
1541
1542                                 $datarray['owner-name'] = $self["name"];
1543                                 $datarray['owner-link'] = $self["url"];
1544                                 $datarray['owner-avatar'] = $self["thumb"];
1545
1546                                 $datarray['author-name']   = $datarray['owner-name'];
1547                                 $datarray['author-link']   = $datarray['owner-link'];
1548                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
1549
1550                                 unset($datarray['created']);
1551                                 unset($datarray['edited']);
1552
1553                                 unset($datarray['network']);
1554                                 unset($datarray['owner-id']);
1555                                 unset($datarray['author-id']);
1556                         }
1557
1558                         if ($contact['network'] != NETWORK_FEED) {
1559                                 $datarray["guid"] = get_guid(32);
1560                                 unset($datarray["plink"]);
1561                                 $datarray["uri"] = item_new_uri($a->get_hostname(), $contact['uid'], $datarray["guid"]);
1562                                 $datarray["parent-uri"] = $datarray["uri"];
1563                                 $datarray["thr-parent"] = $datarray["uri"];
1564                                 $datarray["extid"] = NETWORK_DFRN;
1565                                 $urlpart = parse_url($datarray2['author-link']);
1566                                 $datarray["app"] = $urlpart["host"];
1567                         } else {
1568                                 $datarray['private'] = 0;
1569                         }
1570                 }
1571
1572                 if ($contact['network'] != NETWORK_FEED) {
1573                         // Store the original post
1574                         $result = self::insert($datarray2, false, false);
1575                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
1576                 } else {
1577                         $datarray["app"] = "Feed";
1578                         $result = true;
1579                 }
1580
1581                 // Trigger automatic reactions for addons
1582                 $datarray['api_source'] = true;
1583
1584                 // We have to tell the hooks who we are - this really should be improved
1585                 $_SESSION["authenticated"] = true;
1586                 $_SESSION["uid"] = $contact['uid'];
1587
1588                 return $result;
1589         }
1590
1591         /**
1592          *
1593          * @param string $s
1594          * @param int    $uid
1595          * @param array  $item
1596          * @param int    $cid
1597          * @return string
1598          */
1599         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
1600         {
1601                 if (Config::get('system', 'disable_embedded')) {
1602                         return $s;
1603                 }
1604
1605                 logger('check for photos', LOGGER_DEBUG);
1606                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
1607
1608                 $orig_body = $s;
1609                 $new_body = '';
1610
1611                 $img_start = strpos($orig_body, '[img');
1612                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1613                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1614
1615                 while (($img_st_close !== false) && ($img_len !== false)) {
1616                         $img_st_close++; // make it point to AFTER the closing bracket
1617                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
1618
1619                         logger('found photo ' . $image, LOGGER_DEBUG);
1620
1621                         if (stristr($image, $site . '/photo/')) {
1622                                 // Only embed locally hosted photos
1623                                 $replace = false;
1624                                 $i = basename($image);
1625                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
1626                                 $x = strpos($i, '-');
1627
1628                                 if ($x) {
1629                                         $res = substr($i, $x + 1);
1630                                         $i = substr($i, 0, $x);
1631                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
1632                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
1633                                         if (DBM::is_result($photo)) {
1634                                                 /*
1635                                                  * Check to see if we should replace this photo link with an embedded image
1636                                                  * 1. No need to do so if the photo is public
1637                                                  * 2. If there's a contact-id provided, see if they're in the access list
1638                                                  *    for the photo. If so, embed it.
1639                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
1640                                                  *    permissions, regardless of order but first check to see if they're an exact
1641                                                  *    match to save some processing overhead.
1642                                                  */
1643                                                 if (self::hasPermissions($photo)) {
1644                                                         if ($cid) {
1645                                                                 $recips = self::enumeratePermissions($photo);
1646                                                                 if (in_array($cid, $recips)) {
1647                                                                         $replace = true;
1648                                                                 }
1649                                                         } elseif ($item) {
1650                                                                 if (self::samePermissions($item, $photo)) {
1651                                                                         $replace = true;
1652                                                                 }
1653                                                         }
1654                                                 }
1655                                                 if ($replace) {
1656                                                         $data = $photo['data'];
1657                                                         $type = $photo['type'];
1658
1659                                                         // If a custom width and height were specified, apply before embedding
1660                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
1661                                                                 logger('scaling photo', LOGGER_DEBUG);
1662
1663                                                                 $width = intval($match[1]);
1664                                                                 $height = intval($match[2]);
1665
1666                                                                 $Image = new Image($data, $type);
1667                                                                 if ($Image->isValid()) {
1668                                                                         $Image->scaleDown(max($width, $height));
1669                                                                         $data = $Image->asString();
1670                                                                         $type = $Image->getType();
1671                                                                 }
1672                                                         }
1673
1674                                                         logger('replacing photo', LOGGER_DEBUG);
1675                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
1676                                                         logger('replaced: ' . $image, LOGGER_DATA);
1677                                                 }
1678                                         }
1679                                 }
1680                         }
1681
1682                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
1683                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
1684                         if ($orig_body === false) {
1685                                 $orig_body = '';
1686                         }
1687
1688                         $img_start = strpos($orig_body, '[img');
1689                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1690                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1691                 }
1692
1693                 $new_body = $new_body . $orig_body;
1694
1695                 return $new_body;
1696         }
1697
1698         private static function hasPermissions($obj)
1699         {
1700                 return (
1701                         (
1702                                 x($obj, 'allow_cid')
1703                         ) || (
1704                                 x($obj, 'allow_gid')
1705                         ) || (
1706                                 x($obj, 'deny_cid')
1707                         ) || (
1708                                 x($obj, 'deny_gid')
1709                         )
1710                 );
1711         }
1712
1713         private static function samePermissions($obj1, $obj2)
1714         {
1715                 // first part is easy. Check that these are exactly the same.
1716                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
1717                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
1718                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
1719                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
1720                         return true;
1721                 }
1722
1723                 // This is harder. Parse all the permissions and compare the resulting set.
1724                 $recipients1 = self::enumeratePermissions($obj1);
1725                 $recipients2 = self::enumeratePermissions($obj2);
1726                 sort($recipients1);
1727                 sort($recipients2);
1728
1729                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
1730                 return ($recipients1 == $recipients2);
1731         }
1732
1733         // returns an array of contact-ids that are allowed to see this object
1734         private static function enumeratePermissions($obj)
1735         {
1736                 $allow_people = expand_acl($obj['allow_cid']);
1737                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
1738                 $deny_people  = expand_acl($obj['deny_cid']);
1739                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
1740                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
1741                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
1742                 $recipients   = array_diff($recipients, $deny);
1743                 return $recipients;
1744         }
1745
1746         public static function getFeedTags($item)
1747         {
1748                 $ret = [];
1749                 $matches = false;
1750                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1751                 if ($cnt) {
1752                         for ($x = 0; $x < $cnt; $x ++) {
1753                                 if ($matches[1][$x]) {
1754                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
1755                                 }
1756                         }
1757                 }
1758                 $matches = false;
1759                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1760                 if ($cnt) {
1761                         for ($x = 0; $x < $cnt; $x ++) {
1762                                 if ($matches[1][$x]) {
1763                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
1764                                 }
1765                         }
1766                 }
1767                 return $ret;
1768         }
1769
1770         public static function expire($uid, $days, $network = "", $force = false)
1771         {
1772                 if (!$uid || ($days < 1)) {
1773                         return;
1774                 }
1775
1776                 /*
1777                  * $expire_network_only = save your own wall posts
1778                  * and just expire conversations started by others
1779                  */
1780                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
1781                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
1782
1783                 if ($network != "") {
1784                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
1785
1786                         /*
1787                          * There is an index "uid_network_received" but not "uid_network_created"
1788                          * This avoids the creation of another index just for one purpose.
1789                          * And it doesn't really matter wether to look at "received" or "created"
1790                          */
1791                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1792                 } else {
1793                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1794                 }
1795
1796                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
1797                         WHERE `uid` = %d $range
1798                         AND `id` = `parent`
1799                         $sql_extra
1800                         AND `deleted` = 0",
1801                         intval($uid),
1802                         intval($days)
1803                 );
1804
1805                 if (!DBM::is_result($r)) {
1806                         return;
1807                 }
1808
1809                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
1810
1811                 // Forcing expiring of items - but not notes and marked items
1812                 if ($force) {
1813                         $expire_items = true;
1814                 }
1815
1816                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
1817                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
1818                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
1819
1820                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
1821
1822                 foreach ($r as $item) {
1823
1824                         // don't expire filed items
1825
1826                         if (strpos($item['file'],'[') !== false) {
1827                                 continue;
1828                         }
1829
1830                         // Only expire posts, not photos and photo comments
1831
1832                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
1833                                 continue;
1834                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
1835                                 continue;
1836                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
1837                                 continue;
1838                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
1839                                 continue;
1840                         }
1841
1842                         self::deleteById($item['id'], PRIORITY_LOW);
1843                 }
1844         }
1845
1846         public static function firstPostDate($uid, $wall = false)
1847         {
1848                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
1849                 $params = ['order' => ['created' => false]];
1850                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
1851                 if (DBM::is_result($thread)) {
1852                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
1853                 }
1854                 return false;
1855         }
1856
1857         /**
1858          * @brief add/remove activity to an item
1859          *
1860          * Toggle activities as like,dislike,attend of an item
1861          *
1862          * @param string $item_id
1863          * @param string $verb
1864          *              Activity verb. One of
1865          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
1866          *                      attendno, unattendno, attendmaybe, unattendmaybe
1867          * @hook 'post_local_end'
1868          *              array $arr
1869          *                      'post_id' => ID of posted item
1870          */
1871         public static function performLike($item_id, $verb)
1872         {
1873                 if (!local_user() && !remote_user()) {
1874                         return false;
1875                 }
1876
1877                 switch ($verb) {
1878                         case 'like':
1879                         case 'unlike':
1880                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
1881                                 $activity = ACTIVITY_LIKE;
1882                                 break;
1883                         case 'dislike':
1884                         case 'undislike':
1885                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
1886                                 $activity = ACTIVITY_DISLIKE;
1887                                 break;
1888                         case 'attendyes':
1889                         case 'unattendyes':
1890                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
1891                                 $activity = ACTIVITY_ATTEND;
1892                                 break;
1893                         case 'attendno':
1894                         case 'unattendno':
1895                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
1896                                 $activity = ACTIVITY_ATTENDNO;
1897                                 break;
1898                         case 'attendmaybe':
1899                         case 'unattendmaybe':
1900                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
1901                                 $activity = ACTIVITY_ATTENDMAYBE;
1902                                 break;
1903                         default:
1904                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
1905                                 return false;
1906                 }
1907
1908                 // Enable activity toggling instead of on/off
1909                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
1910
1911                 logger('like: verb ' . $verb . ' item ' . $item_id);
1912
1913                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
1914                 if (!DBM::is_result($item)) {
1915                         logger('like: unknown item ' . $item_id);
1916                         return false;
1917                 }
1918
1919                 $uid = $item['uid'];
1920                 if (($uid == 0) && local_user()) {
1921                         $uid = local_user();
1922                 }
1923
1924                 if (!can_write_wall($uid)) {
1925                         logger('like: unable to write on wall ' . $uid);
1926                         return false;
1927                 }
1928
1929                 // Retrieves the local post owner
1930                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
1931                 if (!DBM::is_result($owner_self_contact)) {
1932                         logger('like: unknown owner ' . $uid);
1933                         return false;
1934                 }
1935
1936                 // Retrieve the current logged in user's public contact
1937                 $author_id = public_contact();
1938
1939                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
1940                 if (!DBM::is_result($author_contact)) {
1941                         logger('like: unknown author ' . $author_id);
1942                         return false;
1943                 }
1944
1945                 // Contact-id is the uid-dependant author contact
1946                 if (local_user() == $uid) {
1947                         $item_contact_id = $owner_self_contact['id'];
1948                         $item_contact = $owner_self_contact;
1949                 } else {
1950                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
1951                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
1952                         if (!DBM::is_result($item_contact)) {
1953                                 logger('like: unknown item contact ' . $item_contact_id);
1954                                 return false;
1955                         }
1956                 }
1957
1958                 // Look for an existing verb row
1959                 // event participation are essentially radio toggles. If you make a subsequent choice,
1960                 // we need to eradicate your first choice.
1961                 if ($event_verb_flag) {
1962                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
1963                 } else {
1964                         $verbs = "'".dbesc($activity)."'";
1965                 }
1966
1967                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
1968                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
1969                         WHERE `verb` IN ($verbs)
1970                         AND `deleted` = 0
1971                         AND `author-id` = %d
1972                         AND `uid` = %d
1973                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
1974                         LIMIT 1",
1975                         intval($author_contact['id']),
1976                         intval($item['uid']),
1977                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
1978                 );
1979
1980                 // If it exists, mark it as deleted
1981                 if (DBM::is_result($existing_like)) {
1982                         $like_item = $existing_like[0];
1983
1984                         // Already voted, undo it
1985                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
1986                         dba::update('item', $fields, ['id' => $like_item['id']]);
1987
1988                         // Clean up the Diaspora signatures for this like
1989                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
1990                         // if it had been enabled in the past
1991                         dba::delete('sign', ['iid' => $like_item['id']]);
1992
1993                         $like_item_id = $like_item['id'];
1994                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
1995
1996                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
1997                                 return true;
1998                         }
1999                 }
2000
2001                 // Verb is "un-something", just trying to delete existing entries
2002                 if (strpos($verb, 'un') === 0) {
2003                         return true;
2004                 }
2005
2006                 // Else or if event verb different from existing row, create a new item row
2007                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2008                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2009                         $post_type = L10n::t('event');
2010                 }
2011                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2012                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2013                 $body = $item['body'];
2014
2015                 $obj = <<< EOT
2016
2017                 <object>
2018                         <type>$objtype</type>
2019                         <local>1</local>
2020                         <id>{$item['uri']}</id>
2021                         <link>$link</link>
2022                         <title></title>
2023                         <content>$body</content>
2024                 </object>
2025 EOT;
2026
2027                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2028                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2029                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2030
2031                 $new_item = [
2032                         'guid'          => get_guid(32),
2033                         'uri'           => item_new_uri(self::getApp()->get_hostname(), $item['uid']),
2034                         'uid'           => $item['uid'],
2035                         'contact-id'    => $item_contact_id,
2036                         'type'          => 'activity',
2037                         'wall'          => $item['wall'],
2038                         'origin'        => 1,
2039                         'gravity'       => GRAVITY_LIKE,
2040                         'parent'        => $item['id'],
2041                         'parent-uri'    => $item['uri'],
2042                         'thr-parent'    => $item['uri'],
2043                         'owner-id'      => $item['owner-id'],
2044                         'owner-name'    => $item['owner-name'],
2045                         'owner-link'    => $item['owner-link'],
2046                         'owner-avatar'  => $item['owner-avatar'],
2047                         'author-id'     => $author_contact['id'],
2048                         'author-name'   => $author_contact['name'],
2049                         'author-link'   => $author_contact['url'],
2050                         'author-avatar' => $author_contact['thumb'],
2051                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2052                         'verb'          => $activity,
2053                         'object-type'   => $objtype,
2054                         'object'        => $obj,
2055                         'allow_cid'     => $item['allow_cid'],
2056                         'allow_gid'     => $item['allow_gid'],
2057                         'deny_cid'      => $item['deny_cid'],
2058                         'deny_gid'      => $item['deny_gid'],
2059                         'visible'       => 1,
2060                         'unseen'        => 1,
2061                 ];
2062
2063                 $new_item_id = self::insert($new_item);
2064
2065                 // If the parent item isn't visible then set it to visible
2066                 if (!$item['visible']) {
2067                         self::update(['visible' => true], ['id' => $item['id']]);
2068                 }
2069
2070                 // Save the author information for the like in case we need to relay to Diaspora
2071                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2072
2073                 $new_item['id'] = $new_item_id;
2074
2075                 Addon::callHooks('post_local_end', $new_item);
2076
2077                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2078
2079                 return true;
2080         }
2081
2082         private static function addThread($itemid, $onlyshadow = false)
2083         {
2084                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2085                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2086                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2087                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2088                 $item = dba::selectFirst('item', $fields, $condition);
2089
2090                 if (!DBM::is_result($item)) {
2091                         return;
2092                 }
2093
2094                 $item['iid'] = $itemid;
2095
2096                 if (!$onlyshadow) {
2097                         $result = dba::insert('thread', $item);
2098
2099                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2100                 }
2101         }
2102
2103         private static function updateThread($itemid, $setmention = false)
2104         {
2105                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
2106                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2107                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id', 'rendered-html', 'rendered-hash'];
2108                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2109
2110                 $item = dba::selectFirst('item', $fields, $condition);
2111                 if (!DBM::is_result($item)) {
2112                         return;
2113                 }
2114
2115                 if ($setmention) {
2116                         $item["mention"] = 1;
2117                 }
2118
2119                 $sql = "";
2120
2121                 $fields = [];
2122
2123                 foreach ($item as $field => $data) {
2124                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
2125                                 $fields[$field] = $data;
2126                         }
2127                 }
2128
2129                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2130
2131                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2132
2133                 // Updating a shadow item entry
2134                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
2135
2136                 if (!DBM::is_result($items)) {
2137                         return;
2138                 }
2139
2140                 $fields = ['title' => $item['title'], 'body' => $item['body'],
2141                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2142                 $result = dba::update('item', $fields, ['id' => $items['id']]);
2143
2144                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
2145         }
2146
2147         private static function deleteThread($itemid, $itemuri = "")
2148         {
2149                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2150                 if (!DBM::is_result($item)) {
2151                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2152                         return;
2153                 }
2154
2155                 // Using dba::delete at this time could delete the associated item entries
2156                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2157
2158                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2159
2160                 if ($itemuri != "") {
2161                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2162                         if (!dba::exists('item', $condition)) {
2163                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2164                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2165                         }
2166                 }
2167         }
2168 }