src/Model/Item.php

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