OStatus.php

   1 <?php
   2 /**
   3  * @file src/Protocol/OStatus.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 use Friendica\App;
   8 use Friendica\Core\Cache;
   9 use Friendica\Core\Config;
  10 use Friendica\Core\System;
  11 use Friendica\Database\DBM;
  12 use Friendica\Model\Contact;
  13 use Friendica\Model\GContact;
  14 use Friendica\Model\Conversation;
  15 use Friendica\Network\Probe;
  16 use Friendica\Object\Image;
  17 use Friendica\Util\Lock;
  18 use Friendica\Util\XML;
  19 use dba;
  20 use DOMDocument;
  21 use DOMXPath;
  22
  23 require_once 'include/dba.php';
  24 require_once 'include/threads.php';
  25 require_once 'include/html2bbcode.php';
  26 require_once 'include/bbcode.php';
  27 require_once 'include/items.php';
  28 require_once 'mod/share.php';
  29 require_once 'include/enotify.php';
  30 require_once 'include/api.php';
  31 require_once 'mod/proxy.php';
  32
  33 /**
  34  * @brief This class contain functions for the OStatus protocol
  35  */
  36 class OStatus
  37 {
  38         private static $itemlist;
  39         private static $conv_list = [];
  40
  41         /**
  42          * @brief Fetches author data
  43          *
  44          * @param object $xpath     The xpath object
  45          * @param object $context   The xml context of the author details
  46          * @param array  $importer  user record of the importing user
  47          * @param array  $contact   Called by reference, will contain the fetched contact
  48          * @param bool   $onlyfetch Only fetch the header without updating the contact entries
  49          *
  50          * @return array Array of author related entries for the item
  51          */
  52         private static function fetchAuthor($xpath, $context, $importer, &$contact, $onlyfetch)
  53         {
  54                 $author = [];
  55                 $author["author-link"] = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
  56                 $author["author-name"] = $xpath->evaluate('atom:author/atom:name/text()', $context)->item(0)->nodeValue;
  57                 $addr = $xpath->evaluate('atom:author/atom:email/text()', $context)->item(0)->nodeValue;
  58
  59                 $aliaslink = $author["author-link"];
  60
  61                 $alternate = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0)->attributes;
  62                 if (is_object($alternate)) {
  63                         foreach ($alternate as $attributes) {
  64                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
  65                                         $author["author-link"] = $attributes->textContent;
  66                                 }
  67                         }
  68                 }
  69                 $author["contact-id"] = $contact["id"];
  70
  71                 $found = false;
  72
  73                 if ($aliaslink != '') {
  74                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ?",
  75                                         $importer["uid"], $aliaslink, NETWORK_STATUSNET];
  76                         $r = dba::selectFirst('contact', [], $condition);
  77
  78                         if (DBM::is_result($r)) {
  79                                 $found = true;
  80                                 if ($r['blocked']) {
  81                                         $r['id'] = -1;
  82                                 }
  83                                 $contact = $r;
  84                                 $author["contact-id"] = $r["id"];
  85                         }
  86                 }
  87
  88                 if (!$found && ($author["author-link"] != "")) {
  89                         if ($aliaslink == "") {
  90                                 $aliaslink = $author["author-link"];
  91                         }
  92
  93                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ?", $importer["uid"],
  94                                         normalise_link($author["author-link"]), normalise_link($aliaslink), NETWORK_STATUSNET];
  95                         $r = dba::selectFirst('contact', [], $condition);
  96
  97                         if (DBM::is_result($r)) {
  98                                 $found = true;
  99                                 if ($r['blocked']) {
 100                                         $r['id'] = -1;
 101                                 }
 102                                 $contact = $r;
 103                                 $author["contact-id"] = $r["id"];
 104                         }
 105                 }
 106
 107                 if (!$found && ($addr != "")) {
 108                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ?",
 109                                         $importer["uid"], $addr, NETWORK_STATUSNET];
 110                         $r = dba::selectFirst('contact', [], $condition);
 111
 112                         if (DBM::is_result($r)) {
 113                                 $found = true;
 114                                 if ($r['blocked']) {
 115                                         $r['id'] = -1;
 116                                 }
 117                                 $contact = $r;
 118                                 $author["contact-id"] = $r["id"];
 119                         }
 120                 }
 121
 122                 $avatarlist = [];
 123                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 124                 foreach ($avatars as $avatar) {
 125                         $href = "";
 126                         $width = 0;
 127                         foreach ($avatar->attributes as $attributes) {
 128                                 if ($attributes->name == "href") {
 129                                         $href = $attributes->textContent;
 130                                 }
 131                                 if ($attributes->name == "width") {
 132                                         $width = $attributes->textContent;
 133                                 }
 134                         }
 135                         if ($href != "") {
 136                                 $avatarlist[$width] = $href;
 137                         }
 138                 }
 139                 if (count($avatarlist) > 0) {
 140                         krsort($avatarlist);
 141                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 142                 }
 143
 144                 $displayname = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
 145                 if ($displayname != "") {
 146                         $author["author-name"] = $displayname;
 147                 }
 148
 149                 $author["owner-name"] = $author["author-name"];
 150                 $author["owner-link"] = $author["author-link"];
 151                 $author["owner-avatar"] = $author["author-avatar"];
 152
 153                 // Only update the contacts if it is an OStatus contact
 154                 if ($r && ($r['id'] > 0) && !$onlyfetch && ($contact["network"] == NETWORK_OSTATUS)) {
 155
 156                         // Update contact data
 157                         $current = $contact;
 158                         unset($current['name-date']);
 159
 160                         // This query doesn't seem to work
 161                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 162                         // if ($value != "")
 163                         //      $contact["notify"] = $value;
 164
 165                         // This query doesn't seem to work as well - I hate these queries
 166                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 167                         // if ($value != "")
 168                         //      $contact["poll"] = $value;
 169
 170                         $contact['url'] = $author["author-link"];
 171                         $contact['nurl'] = normalise_link($contact['url']);
 172
 173                         $value = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
 174                         if ($value != "") {
 175                                 $contact["alias"] = $value;
 176                         }
 177
 178                         $value = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
 179                         if ($value != "") {
 180                                 $contact["name"] = $value;
 181                         }
 182
 183                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $context)->item(0)->nodeValue;
 184                         if ($value != "") {
 185                                 $contact["nick"] = $value;
 186                         }
 187
 188                         $value = $xpath->evaluate('atom:author/poco:note/text()', $context)->item(0)->nodeValue;
 189                         if ($value != "") {
 190                                 $contact["about"] = html2bbcode($value);
 191                         }
 192
 193                         $value = $xpath->evaluate('atom:author/poco:address/poco:formatted/text()', $context)->item(0)->nodeValue;
 194                         if ($value != "") {
 195                                 $contact["location"] = $value;
 196                         }
 197
 198                         $contact['name-date'] = datetime_convert();
 199
 200                         dba::update('contact', $contact, ['id' => $contact["id"]], $current);
 201
 202                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 203                                 logger("Update profile picture for contact ".$contact["id"], LOGGER_DEBUG);
 204                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
 205                         }
 206
 207                         // Ensure that we are having this contact (with uid=0)
 208                         $cid = Contact::getIdForURL($aliaslink, 0);
 209
 210                         if ($cid) {
 211                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 212                                 $old_contact = dba::selectFirst('contact', $fields, ['id' => $cid]);
 213
 214                                 // Update it with the current values
 215                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 216                                                 'nurl' => normalise_link($author["author-link"]),
 217                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 218                                                 'about' => $contact["about"], 'location' => $contact["location"],
 219                                                 'success_update' => datetime_convert(), 'last-update' => datetime_convert()];
 220
 221                                 dba::update('contact', $fields, ['id' => $cid], $old_contact);
 222
 223                                 // Update the avatar
 224                                 Contact::updateAvatar($author["author-avatar"], 0, $cid);
 225                         }
 226
 227                         $contact["generation"] = 2;
 228                         $contact["hide"] = false; // OStatus contacts are never hidden
 229                         $contact["photo"] = $author["author-avatar"];
 230                         $gcid = GContact::update($contact);
 231
 232                         GContact::link($gcid, $contact["uid"], $contact["id"]);
 233                 }
 234
 235                 return $author;
 236         }
 237
 238         /**
 239          * @brief Fetches author data from a given XML string
 240          *
 241          * @param string $xml      The XML
 242          * @param array  $importer user record of the importing user
 243          *
 244          * @return array Array of author related entries for the item
 245          */
 246         public static function salmonAuthor($xml, $importer)
 247         {
 248                 if ($xml == "") {
 249                         return;
 250                 }
 251
 252                 $doc = new DOMDocument();
 253                 @$doc->loadXML($xml);
 254
 255                 $xpath = new DOMXPath($doc);
 256                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 257                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 258                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 259                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 260                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 261                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 262                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 263                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 264
 265                 $entries = $xpath->query('/atom:entry');
 266
 267                 foreach ($entries as $entry) {
 268                         // fetch the author
 269                         $author = self::fetchAuthor($xpath, $entry, $importer, $contact, true);
 270                         return $author;
 271                 }
 272         }
 273
 274         /**
 275          * @brief Read attributes from element
 276          *
 277          * @param object $element Element object
 278          *
 279          * @return array attributes
 280          */
 281         private static function readAttributes($element)
 282         {
 283                 $attribute = [];
 284
 285                 foreach ($element->attributes as $attributes) {
 286                         $attribute[$attributes->name] = $attributes->textContent;
 287                 }
 288
 289                 return $attribute;
 290         }
 291
 292         /**
 293          * @brief Imports an XML string containing OStatus elements
 294          *
 295          * @param string $xml      The XML
 296          * @param array  $importer user record of the importing user
 297          * @param array  $contact  contact
 298          * @param string $hub      Called by reference, returns the fetched hub data
 299          * @return void
 300          */
 301         public static function import($xml, $importer, &$contact, &$hub)
 302         {
 303                 self::process($xml, $importer, $contact, $hub);
 304         }
 305
 306         /**
 307          * @brief Internal feed processing
 308          *
 309          * @param string  $xml        The XML
 310          * @param array   $importer   user record of the importing user
 311          * @param array   $contact    contact
 312          * @param string  $hub        Called by reference, returns the fetched hub data
 313          * @param boolean $stored     Is the post fresh imported or from the database?
 314          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 315          *
 316          * @return boolean Could the XML be processed?
 317          */
 318         private static function process($xml, $importer, &$contact, &$hub, $stored = false, $initialize = true)
 319         {
 320                 if ($initialize) {
 321                         self::$itemlist = [];
 322                         self::$conv_list = [];
 323                 }
 324
 325                 logger("Import OStatus message", LOGGER_DEBUG);
 326
 327                 if ($xml == "") {
 328                         return false;
 329                 }
 330                 $doc = new DOMDocument();
 331                 @$doc->loadXML($xml);
 332
 333                 $xpath = new DOMXPath($doc);
 334                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 335                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 336                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 337                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 338                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 339                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 340                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 341                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 342
 343                 $hub = "";
 344                 $hub_attributes = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0)->attributes;
 345                 if (is_object($hub_attributes)) {
 346                         foreach ($hub_attributes as $hub_attribute) {
 347                                 if ($hub_attribute->name == "href") {
 348                                         $hub = $hub_attribute->textContent;
 349                                         logger("Found hub ".$hub, LOGGER_DEBUG);
 350                                 }
 351                         }
 352                 }
 353
 354                 $header = [];
 355                 $header["uid"] = $importer["uid"];
 356                 $header["network"] = NETWORK_OSTATUS;
 357                 $header["type"] = "remote";
 358                 $header["wall"] = 0;
 359                 $header["origin"] = 0;
 360                 $header["gravity"] = GRAVITY_PARENT;
 361
 362                 $first_child = $doc->firstChild->tagName;
 363
 364                 if ($first_child == "feed") {
 365                         $entries = $xpath->query('/atom:feed/atom:entry');
 366                 } else {
 367                         $entries = $xpath->query('/atom:entry');
 368                 }
 369
 370                 if ($entries->length == 1) {
 371                         // We reformat the XML to make it better readable
 372                         $doc2 = new DOMDocument();
 373                         $doc2->loadXML($xml);
 374                         $doc2->preserveWhiteSpace = false;
 375                         $doc2->formatOutput = true;
 376                         $xml2 = $doc2->saveXML();
 377
 378                         $header["protocol"] = PROTOCOL_OSTATUS_SALMON;
 379                         $header["source"] = $xml2;
 380                 } elseif (!$initialize) {
 381                         return false;
 382                 }
 383
 384                 // Fetch the first author
 385                 $authordata = $xpath->query('//author')->item(0);
 386                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 387
 388                 $entry = $xpath->query('/atom:entry');
 389
 390                 // Reverse the order of the entries
 391                 $entrylist = [];
 392
 393                 foreach ($entries as $entry) {
 394                         $entrylist[] = $entry;
 395                 }
 396
 397                 foreach (array_reverse($entrylist) as $entry) {
 398                         // fetch the author
 399                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 400
 401                         if ($authorelement->length == 0) {
 402                                 $authorelement = $xpath->query('atom:author', $entry);
 403                         }
 404
 405                         if ($authorelement->length > 0) {
 406                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 407                         }
 408
 409                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $entry)->item(0)->nodeValue;
 410                         if ($value != "") {
 411                                 $nickname = $value;
 412                         } else {
 413                                 $nickname = $author["author-name"];
 414                         }
 415
 416                         $item = array_merge($header, $author);
 417
 418                         $item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
 419
 420                         $item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
 421
 422                         // Delete a message
 423                         if (in_array($item["verb"], ['qvitter-delete-notice', ACTIVITY_DELETE, 'delete'])) {
 424                                 self::deleteNotice($item);
 425                                 continue;
 426                         }
 427
 428                         if (in_array($item["verb"], [NAMESPACE_OSTATUS."/unfavorite", ACTIVITY_UNFAVORITE])) {
 429                                 // Ignore "Unfavorite" message
 430                                 logger("Ignore unfavorite message ".print_r($item, true), LOGGER_DEBUG);
 431                                 continue;
 432                         }
 433
 434                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 435                         if (dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 436                                 logger('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 437                                 continue;
 438                         } else {
 439                                 logger('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 440                         }
 441
 442                         if ($item["verb"] == ACTIVITY_JOIN) {
 443                                 // ignore "Join" messages
 444                                 logger("Ignore join message ".print_r($item, true), LOGGER_DEBUG);
 445                                 continue;
 446                         }
 447
 448                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 449                                 // ignore mastodon "block" messages
 450                                 logger("Ignore block message ".print_r($item, true), LOGGER_DEBUG);
 451                                 continue;
 452                         }
 453
 454                         if ($item["verb"] == ACTIVITY_FOLLOW) {
 455                                 new_follower($importer, $contact, $item, $nickname);
 456                                 continue;
 457                         }
 458
 459                         if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
 460                                 lose_follower($importer, $contact, $item, $dummy);
 461                                 continue;
 462                         }
 463
 464                         if ($item["verb"] == ACTIVITY_FAVORITE) {
 465                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 466                                 logger("Favorite ".$orig_uri." ".print_r($item, true));
 467
 468                                 $item["verb"] = ACTIVITY_LIKE;
 469                                 $item["parent-uri"] = $orig_uri;
 470                                 $item["gravity"] = GRAVITY_LIKE;
 471                         }
 472
 473                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 474                         if (!in_array($item["verb"], [ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE])) {
 475                                 logger("Unhandled verb ".$item["verb"]." ".print_r($item, true), LOGGER_DEBUG);
 476                         }
 477
 478                         self::processPost($xpath, $entry, $item, $importer);
 479
 480                         if ($initialize && (count(self::$itemlist) > 0)) {
 481                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 482                                         // We will import it everytime, when it is started by our contacts
 483                                         $valid = !empty(self::$itemlist[0]['contact-id']);
 484                                         if (!$valid) {
 485                                                 // If not, then it depends on this setting
 486                                                 $valid = !Config::get('system', 'ostatus_full_threads');
 487                                         }
 488                                         if ($valid) {
 489                                                 // Never post a thread when the only interaction by our contact was a like
 490                                                 $valid = false;
 491                                                 $verbs = [ACTIVITY_POST, ACTIVITY_SHARE];
 492                                                 foreach (self::$itemlist as $item) {
 493                                                         if (!empty($item['contact-id']) && in_array($item['verb'], $verbs)) {
 494                                                                 $valid = true;
 495                                                         }
 496                                                 }
 497                                         }
 498                                 } else {
 499                                         // But we will only import complete threads
 500                                         $valid = dba::exists('item', ['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 501                                 }
 502
 503                                 if ($valid) {
 504                                         $default_contact = 0;
 505                                         $key = count(self::$itemlist);
 506                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 507                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 508                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 509                                                 } else {
 510                                                         $default_contact = $item['contact-id'];
 511                                                 }
 512                                         }
 513                                         foreach (self::$itemlist as $item) {
 514                                                 $found = dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 515                                                 if ($found) {
 516                                                         logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", LOGGER_DEBUG);
 517                                                 } elseif ($item['contact-id'] < 0) {
 518                                                         logger("Item with uri ".$item["uri"]." is from a blocked contact.", LOGGER_DEBUG);
 519                                                 } else {
 520                                                         // We are having duplicated entries. Hopefully this solves it.
 521                                                         if (Lock::set('ostatus_process_item_store')) {
 522                                                                 $ret = item_store($item);
 523                                                                 Lock::remove('ostatus_process_item_store');
 524                                                                 logger("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 525                                                         } else {
 526                                                                 $ret = item_store($item);
 527                                                                 logger("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
 528                                                         }
 529                                                 }
 530                                         }
 531                                 }
 532                                 self::$itemlist = [];
 533                         }
 534                         logger('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 535                 }
 536                 return true;
 537         }
 538
 539         /**
 540          * @param object $item item
 541          * @return void
 542          */
 543         private static function deleteNotice($item)
 544         {
 545                 $condition = ['uid' => $item['uid'], 'author-link' => $item['author-link'], 'uri' => $item['uri']];
 546                 $deleted = dba::selectFirst('item', ['id', 'parent-uri'], $condition);
 547                 if (!DBM::is_result($deleted)) {
 548                         logger('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it. ");
 549                         return;
 550                 }
 551
 552                 // Currently we don't have a central deletion function that we could use in this case
 553                 // The function "item_drop" doesn't work for that case
 554                 dba::update(
 555                         'item',
 556                         ['deleted' => true, 'title' => '', 'body' => '',
 557                                         'edited' => datetime_convert(), 'changed' => datetime_convert()],
 558                         ['id' => $deleted["id"]]
 559                 );
 560
 561                 delete_thread($deleted["id"], $deleted["parent-uri"]);
 562
 563                 logger('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 564         }
 565
 566         /**
 567          * @brief Processes the XML for a post
 568          *
 569          * @param object $xpath    The xpath object
 570          * @param object $entry    The xml entry that is processed
 571          * @param array  $item     The item array
 572          * @param array  $importer user record of the importing user
 573          * @return void
 574          */
 575         private static function processPost($xpath, $entry, &$item, $importer)
 576         {
 577                 $item["body"] = html2bbcode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
 578                 $item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
 579                 if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
 580                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 581                         $item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 582                 } elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
 583                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 584                 }
 585
 586                 $item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 587                 $item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 588                 $conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
 589                 $item['conversation-uri'] = $conversation;
 590
 591                 $conv = $xpath->query('ostatus:conversation', $entry);
 592                 if (is_object($conv->item(0))) {
 593                         foreach ($conv->item(0)->attributes as $attributes) {
 594                                 if ($attributes->name == "ref") {
 595                                         $item['conversation-uri'] = $attributes->textContent;
 596                                 }
 597                                 if ($attributes->name == "href") {
 598                                         $item['conversation-href'] = $attributes->textContent;
 599                                 }
 600                         }
 601                 }
 602
 603                 $related = "";
 604
 605                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 606                 if (is_object($inreplyto->item(0))) {
 607                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 608                                 if ($attributes->name == "ref") {
 609                                         $item["parent-uri"] = $attributes->textContent;
 610                                 }
 611                                 if ($attributes->name == "href") {
 612                                         $related = $attributes->textContent;
 613                                 }
 614                         }
 615                 }
 616
 617                 $georsspoint = $xpath->query('georss:point', $entry);
 618                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 619                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 620                 }
 621
 622                 $categories = $xpath->query('atom:category', $entry);
 623                 if ($categories) {
 624                         foreach ($categories as $category) {
 625                                 foreach ($category->attributes as $attributes) {
 626                                         if ($attributes->name == "term") {
 627                                                 $term = $attributes->textContent;
 628                                                 if (strlen($item["tag"])) {
 629                                                         $item["tag"] .= ',';
 630                                                 }
 631                                                 $item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
 632                                         }
 633                                 }
 634                         }
 635                 }
 636
 637                 $self = '';
 638                 $add_body = '';
 639
 640                 $links = $xpath->query('atom:link', $entry);
 641                 if ($links) {
 642                         $link_data = self::processLinks($links, $item);
 643                         $self = $link_data['self'];
 644                         $add_body = $link_data['add_body'];
 645                 }
 646
 647                 $repeat_of = "";
 648
 649                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 650                 if ($notice_info && ($notice_info->length > 0)) {
 651                         foreach ($notice_info->item(0)->attributes as $attributes) {
 652                                 if ($attributes->name == "source") {
 653                                         $item["app"] = strip_tags($attributes->textContent);
 654                                 }
 655                                 if ($attributes->name == "repeat_of") {
 656                                         $repeat_of = $attributes->textContent;
 657                                 }
 658                         }
 659                 }
 660                 // Is it a repeated post?
 661                 if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
 662                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 663                         if (!empty($link_data['add_body'])) {
 664                                 $add_body .= $link_data['add_body'];
 665                         }
 666                 }
 667
 668                 $item["body"] .= $add_body;
 669
 670                 // Only add additional data when there is no picture in the post
 671                 if (!strstr($item["body"], '[/img]')) {
 672                         $item["body"] = add_page_info_to_body($item["body"]);
 673                 }
 674
 675                 // Mastodon Content Warning
 676                 if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 677                         $clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 678
 679                         $item["body"] = html2bbcode($clear_text) . '[spoiler]' . $item["body"] . '[/spoiler]';
 680                 }
 681
 682                 if (($self != '') && empty($item['protocol'])) {
 683                         self::fetchSelf($self, $item);
 684                 }
 685
 686                 if (!empty($item["conversation-href"])) {
 687                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 688                 }
 689
 690                 if (isset($item["parent-uri"]) && ($related != '')) {
 691                         if (!dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 692                                 self::fetchRelated($related, $item["parent-uri"], $importer);
 693                         } else {
 694                                 logger('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 695                         }
 696
 697                         $item["type"] = 'remote-comment';
 698                         $item["gravity"] = GRAVITY_COMMENT;
 699                 } else {
 700                         $item["parent-uri"] = $item["uri"];
 701                 }
 702
 703                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 704                         $item = Conversation::insert($item);
 705                 }
 706
 707                 self::$itemlist[] = $item;
 708         }
 709
 710         /**
 711          * @brief Fetch the conversation for posts
 712          *
 713          * @param string $conversation     The link to the conversation
 714          * @param string $conversation_uri The conversation in "uri" format
 715          * @return void
 716          */
 717         private static function fetchConversation($conversation, $conversation_uri)
 718         {
 719                 // Ensure that we only store a conversation once in a process
 720                 if (isset(self::$conv_list[$conversation])) {
 721                         return;
 722                 }
 723
 724                 self::$conv_list[$conversation] = true;
 725
 726                 $conversation_data = z_fetch_url($conversation, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 727
 728                 if (!$conversation_data['success']) {
 729                         return;
 730                 }
 731
 732                 $xml = '';
 733
 734                 if (stristr($conversation_data['header'], 'Content-Type: application/atom+xml')) {
 735                         $xml = $conversation_data['body'];
 736                 }
 737
 738                 if ($xml == '') {
 739                         $doc = new DOMDocument();
 740                         if (!@$doc->loadHTML($conversation_data['body'])) {
 741                                 return;
 742                         }
 743                         $xpath = new DOMXPath($doc);
 744
 745                         $links = $xpath->query('//link');
 746                         if ($links) {
 747                                 foreach ($links as $link) {
 748                                         $attribute = self::readAttributes($link);
 749                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 750                                                 $file = $attribute['href'];
 751                                         }
 752                                 }
 753                                 if ($file != '') {
 754                                         $conversation_atom = z_fetch_url($attribute['href']);
 755
 756                                         if ($conversation_atom['success']) {
 757                                                 $xml = $conversation_atom['body'];
 758                                         }
 759                                 }
 760                         }
 761                 }
 762
 763                 if ($xml == '') {
 764                         return;
 765                 }
 766
 767                 self::storeConversation($xml, $conversation, $conversation_uri);
 768         }
 769
 770         /**
 771          * @brief Store a feed in several conversation entries
 772          *
 773          * @param string $xml              The feed
 774          * @param string $conversation     conversation
 775          * @param string $conversation_uri conversation uri
 776          * @return void
 777          */
 778         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 779         {
 780                 $doc = new DOMDocument();
 781                 @$doc->loadXML($xml);
 782
 783                 $xpath = new DOMXPath($doc);
 784                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 785                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 786                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 787
 788                 $entries = $xpath->query('/atom:feed/atom:entry');
 789
 790                 // Now store the entries
 791                 foreach ($entries as $entry) {
 792                         $doc2 = new DOMDocument();
 793                         $doc2->preserveWhiteSpace = false;
 794                         $doc2->formatOutput = true;
 795
 796                         $conv_data = [];
 797
 798                         $conv_data['protocol'] = PROTOCOL_SPLITTED_CONV;
 799                         $conv_data['network'] = NETWORK_OSTATUS;
 800                         $conv_data['uri'] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
 801
 802                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 803                         if (is_object($inreplyto->item(0))) {
 804                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 805                                         if ($attributes->name == "ref") {
 806                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 807                                         }
 808                                 }
 809                         }
 810
 811                         $conv = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
 812                         $conv_data['conversation-uri'] = $conv;
 813
 814                         $conv = $xpath->query('ostatus:conversation', $entry);
 815                         if (is_object($conv->item(0))) {
 816                                 foreach ($conv->item(0)->attributes as $attributes) {
 817                                         if ($attributes->name == "ref") {
 818                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 819                                         }
 820                                         if ($attributes->name == "href") {
 821                                                 $conv_data['conversation-href'] = $attributes->textContent;
 822                                         }
 823                                 }
 824                         }
 825
 826                         if ($conversation != '') {
 827                                 $conv_data['conversation-uri'] = $conversation;
 828                         }
 829
 830                         if ($conversation_uri != '') {
 831                                 $conv_data['conversation-uri'] = $conversation_uri;
 832                         }
 833
 834                         $entry = $doc2->importNode($entry, true);
 835
 836                         $doc2->appendChild($entry);
 837
 838                         $conv_data['source'] = $doc2->saveXML();
 839
 840                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => PROTOCOL_OSTATUS_FEED];
 841                         if (dba::exists('conversation', $condition)) {
 842                                 logger('Delete deprecated entry for URI '.$conv_data['uri'], LOGGER_DEBUG);
 843                                 dba::delete('conversation', ['item-uri' => $conv_data['uri']]);
 844                         }
 845
 846                         logger('Store conversation data for uri '.$conv_data['uri'], LOGGER_DEBUG);
 847                         Conversation::insert($conv_data);
 848                 }
 849         }
 850
 851         /**
 852          * @brief Fetch the own post so that it can be stored later
 853          *
 854          * We want to store the original data for later processing.
 855          * This function is meant for cases where we process a feed with multiple entries.
 856          * In that case we need to fetch the single posts here.
 857          *
 858          * @param string $self The link to the self item
 859          * @param array  $item The item array
 860          * @return void
 861          */
 862         private static function fetchSelf($self, &$item)
 863         {
 864                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 865                 if (dba::exists('conversation', $condition)) {
 866                         logger('Conversation '.$item['uri'].' is already stored.', LOGGER_DEBUG);
 867                         return;
 868                 }
 869
 870                 $self_data = z_fetch_url($self);
 871
 872                 if (!$self_data['success']) {
 873                         return;
 874                 }
 875
 876                 // We reformat the XML to make it better readable
 877                 $doc = new DOMDocument();
 878                 $doc->loadXML($self_data['body']);
 879                 $doc->preserveWhiteSpace = false;
 880                 $doc->formatOutput = true;
 881                 $xml = $doc->saveXML();
 882
 883                 $item["protocol"] = PROTOCOL_OSTATUS_SALMON;
 884                 $item["source"] = $xml;
 885
 886                 logger('Conversation '.$item['uri'].' is now fetched.', LOGGER_DEBUG);
 887         }
 888
 889         /**
 890          * @brief Fetch related posts and processes them
 891          *
 892          * @param string $related     The link to the related item
 893          * @param string $related_uri The related item in "uri" format
 894          * @param array  $importer    user record of the importing user
 895          * @return void
 896          */
 897         private static function fetchRelated($related, $related_uri, $importer)
 898         {
 899                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 900                 $conversation = dba::selectFirst('conversation', ['source', 'protocol'], $condition);
 901                 if (DBM::is_result($conversation)) {
 902                         $stored = true;
 903                         $xml = $conversation['source'];
 904                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 905                                 logger('Got valid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 906                                 return;
 907                         }
 908                         if ($conversation['protocol'] == PROTOCOL_OSTATUS_SALMON) {
 909                                 logger('Delete invalid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 910                                 dba::delete('conversation', ['item-uri' => $related_uri]);
 911                         }
 912                 }
 913
 914                 $stored = false;
 915                 $related_data = z_fetch_url($related, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 916
 917                 if (!$related_data['success']) {
 918                         return;
 919                 }
 920
 921                 $xml = '';
 922
 923                 if (stristr($related_data['header'], 'Content-Type: application/atom+xml')) {
 924                         logger('Directly fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 925                         $xml = $related_data['body'];
 926                 }
 927
 928                 if ($xml == '') {
 929                         $doc = new DOMDocument();
 930                         if (!@$doc->loadHTML($related_data['body'])) {
 931                                 return;
 932                         }
 933                         $xpath = new DOMXPath($doc);
 934
 935                         $atom_file = '';
 936
 937                         $links = $xpath->query('//link');
 938                         if ($links) {
 939                                 foreach ($links as $link) {
 940                                         $attribute = self::readAttributes($link);
 941                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 942                                                 $atom_file = $attribute['href'];
 943                                         }
 944                                 }
 945                                 if ($atom_file != '') {
 946                                         $related_atom = z_fetch_url($atom_file);
 947
 948                                         if ($related_atom['success']) {
 949                                                 logger('Fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 950                                                 $xml = $related_atom['body'];
 951                                         }
 952                                 }
 953                         }
 954                 }
 955
 956                 // Workaround for older GNU Social servers
 957                 if (($xml == '') && strstr($related, '/notice/')) {
 958                         $related_atom = z_fetch_url(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
 959
 960                         if ($related_atom['success']) {
 961                                 logger('GNU Social workaround to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 962                                 $xml = $related_atom['body'];
 963                         }
 964                 }
 965
 966                 // Even more worse workaround for GNU Social ;-)
 967                 if ($xml == '') {
 968                         $related_guess = OStatus::convertHref($related_uri);
 969                         $related_atom = z_fetch_url(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
 970
 971                         if ($related_atom['success']) {
 972                                 logger('GNU Social workaround 2 to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 973                                 $xml = $related_atom['body'];
 974                         }
 975                 }
 976
 977                 // Finally we take the data that we fetched from "ostatus:conversation"
 978                 if ($xml == '') {
 979                         $condition = ['item-uri' => $related_uri, 'protocol' => PROTOCOL_SPLITTED_CONV];
 980                         $conversation = dba::selectFirst('conversation', ['source'], $condition);
 981                         if (DBM::is_result($conversation)) {
 982                                 $stored = true;
 983                                 logger('Got cached XML from conversation for URI '.$related_uri, LOGGER_DEBUG);
 984                                 $xml = $conversation['source'];
 985                         }
 986                 }
 987
 988                 if ($xml != '') {
 989                         self::process($xml, $importer, $contact, $hub, $stored, false);
 990                 } else {
 991                         logger("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, LOGGER_DEBUG);
 992                 }
 993                 return;
 994         }
 995
 996         /**
 997          * @brief Processes the XML for a repeated post
 998          *
 999          * @param object $xpath    The xpath object
1000          * @param object $entry    The xml entry that is processed
1001          * @param array  $item     The item array
1002          * @param array  $importer user record of the importing user
1003          *
1004          * @return array with data from links
1005          */
1006         private static function processRepeatedItem($xpath, $entry, &$item, $importer)
1007         {
1008                 $activityobjects = $xpath->query('activity:object', $entry)->item(0);
1009
1010                 if (!is_object($activityobjects)) {
1011                         return [];
1012                 }
1013
1014                 $link_data = [];
1015
1016                 $orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
1017
1018                 $links = $xpath->query("atom:link", $activityobjects);
1019                 if ($links) {
1020                         $link_data = self::processLinks($links, $item);
1021                 }
1022
1023                 $orig_body = $xpath->query('atom:content/text()', $activityobjects)->item(0)->nodeValue;
1024                 $orig_created = $xpath->query('atom:published/text()', $activityobjects)->item(0)->nodeValue;
1025                 $orig_edited = $xpath->query('atom:updated/text()', $activityobjects)->item(0)->nodeValue;
1026
1027                 $orig_author = self::fetchAuthor($xpath, $activityobjects, $importer, $dummy, false);
1028
1029                 $item["author-name"] = $orig_author["author-name"];
1030                 $item["author-link"] = $orig_author["author-link"];
1031                 $item["author-avatar"] = $orig_author["author-avatar"];
1032
1033                 $item["body"] = html2bbcode($orig_body);
1034                 $item["created"] = $orig_created;
1035                 $item["edited"] = $orig_edited;
1036
1037                 $item["uri"] = $orig_uri;
1038
1039                 $item["verb"] = $xpath->query('activity:verb/text()', $activityobjects)->item(0)->nodeValue;
1040
1041                 $item["object-type"] = $xpath->query('activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
1042
1043                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobjects);
1044                 if (is_object($inreplyto->item(0))) {
1045                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1046                                 if ($attributes->name == "ref") {
1047                                         $item["parent-uri"] = $attributes->textContent;
1048                                 }
1049                         }
1050                 }
1051
1052                 return $link_data;
1053         }
1054
1055         /**
1056          * @brief Processes links in the XML
1057          *
1058          * @param object $links The xml data that contain links
1059          * @param array  $item  The item array
1060          *
1061          * @return array with data from the links
1062          */
1063         private static function processLinks($links, &$item)
1064         {
1065                 $link_data = ['add_body' => '', 'self' => ''];
1066
1067                 foreach ($links as $link) {
1068                         $attribute = self::readAttributes($link);
1069
1070                         if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
1071                                 switch ($attribute['rel']) {
1072                                         case "alternate":
1073                                                 $item["plink"] = $attribute['href'];
1074                                                 if (($item["object-type"] == ACTIVITY_OBJ_QUESTION)
1075                                                         || ($item["object-type"] == ACTIVITY_OBJ_EVENT)
1076                                                 ) {
1077                                                         $item["body"] .= add_page_info($attribute['href']);
1078                                                 }
1079                                                 break;
1080                                         case "ostatus:conversation":
1081                                                 $link_data['conversation'] = $attribute['href'];
1082                                                 $item['conversation-href'] = $link_data['conversation'];
1083                                                 if (!isset($item['conversation-uri'])) {
1084                                                         $item['conversation-uri'] = $item['conversation-href'];
1085                                                 }
1086                                                 break;
1087                                         case "enclosure":
1088                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1089                                                 if ($filetype == 'image') {
1090                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1091                                                 } else {
1092                                                         if (strlen($item["attach"])) {
1093                                                                 $item["attach"] .= ',';
1094                                                         }
1095                                                         if (!isset($attribute['length'])) {
1096                                                                 $attribute['length'] = "0";
1097                                                         }
1098                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
1099                                                 }
1100                                                 break;
1101                                         case "related":
1102                                                 if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
1103                                                         if (!isset($item["parent-uri"])) {
1104                                                                 $item["parent-uri"] = $attribute['href'];
1105                                                         }
1106                                                         $link_data['related'] = $attribute['href'];
1107                                                 } else {
1108                                                         $item["body"] .= add_page_info($attribute['href']);
1109                                                 }
1110                                                 break;
1111                                         case "self":
1112                                                 if ($item["plink"] == '') {
1113                                                         $item["plink"] = $attribute['href'];
1114                                                 }
1115                                                 $link_data['self'] = $attribute['href'];
1116                                                 break;
1117                                 }
1118                         }
1119                 }
1120                 return $link_data;
1121         }
1122
1123         /**
1124          * @brief Create an url out of an uri
1125          *
1126          * @param string $href URI in the format "parameter1:parameter1:..."
1127          *
1128          * @return string URL in the format http(s)://....
1129          */
1130         public static function convertHref($href)
1131         {
1132                 $elements = explode(":", $href);
1133
1134                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1135                         return $href;
1136                 }
1137
1138                 $server = explode(",", $elements[1]);
1139                 $conversation = explode("=", $elements[2]);
1140
1141                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1142                         return "http://".$server[0]."/notice/".$elements[3];
1143                 }
1144
1145                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1146                         return $href;
1147                 }
1148                 if ($elements[3] == "objectType=thread") {
1149                         return "http://".$server[0]."/conversation/".$conversation[1];
1150                 } else {
1151                         return "http://".$server[0]."/notice/".$conversation[1];
1152                 }
1153                 return $href;
1154         }
1155
1156         /**
1157          * @brief Checks if the current post is a reshare
1158          *
1159          * @param array $item The item array of thw post
1160          *
1161          * @return string The guid if the post is a reshare
1162          */
1163         private static function getResharedGuid($item)
1164         {
1165                 $body = trim($item["body"]);
1166
1167                 // Skip if it isn't a pure repeated messages
1168                 // Does it start with a share?
1169                 if (strpos($body, "[share") > 0) {
1170                         return "";
1171                 }
1172
1173                 // Does it end with a share?
1174                 if (strlen($body) > (strrpos($body, "[/share]") + 8)) {
1175                         return "";
1176                 }
1177
1178                 $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "$1", $body);
1179                 // Skip if there is no shared message in there
1180                 if ($body == $attributes) {
1181                         return false;
1182                 }
1183
1184                 $guid = "";
1185                 preg_match("/guid='(.*?)'/ism", $attributes, $matches);
1186                 if ($matches[1] != "") {
1187                         $guid = $matches[1];
1188                 }
1189
1190                 preg_match('/guid="(.*?)"/ism', $attributes, $matches);
1191                 if ($matches[1] != "") {
1192                         $guid = $matches[1];
1193                 }
1194
1195                 return $guid;
1196         }
1197
1198         /**
1199          * @brief Cleans the body of a post if it contains picture links
1200          *
1201          * @param string $body The body
1202          *
1203          * @return string The cleaned body
1204          */
1205         private static function formatPicturePost($body)
1206         {
1207                 $siteinfo = get_attached_data($body);
1208
1209                 if (($siteinfo["type"] == "photo")) {
1210                         if (isset($siteinfo["preview"])) {
1211                                 $preview = $siteinfo["preview"];
1212                         } else {
1213                                 $preview = $siteinfo["image"];
1214                         }
1215
1216                         // Is it a remote picture? Then make a smaller preview here
1217                         $preview = proxy_url($preview, false, PROXY_SIZE_SMALL);
1218
1219                         // Is it a local picture? Then make it smaller here
1220                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1221                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1222
1223                         if (isset($siteinfo["url"])) {
1224                                 $url = $siteinfo["url"];
1225                         } else {
1226                                 $url = $siteinfo["image"];
1227                         }
1228
1229                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1230                 }
1231
1232                 return $body;
1233         }
1234
1235         /**
1236          * @brief Adds the header elements to the XML document
1237          *
1238          * @param object $doc    XML document
1239          * @param array  $owner  Contact data of the poster
1240          * @param string $filter The related feed filter (activity, posts or comments)
1241          *
1242          * @return object header root element
1243          */
1244         private static function addHeader($doc, $owner, $filter)
1245         {
1246                 $a = get_app();
1247
1248                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
1249                 $doc->appendChild($root);
1250
1251                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1252                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1253                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1254                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1255                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
1256                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1257                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1258                 $root->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1259
1260                 switch ($filter) {
1261                         case 'activity': $title = t('%s\'s timeline', $owner['name']); break;
1262                         case 'posts'   : $title = t('%s\'s posts'   , $owner['name']); break;
1263                         case 'comments': $title = t('%s\'s comments', $owner['name']); break;
1264                 }
1265
1266                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1267                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1268                 XML::addElement($doc, $root, "id", System::baseUrl() . "/profile/" . $owner["nick"]);
1269                 XML::addElement($doc, $root, "title", $title);
1270                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], $a->config["sitename"]));
1271                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1272                 XML::addElement($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
1273
1274                 $author = self::addAuthor($doc, $owner);
1275                 $root->appendChild($author);
1276
1277                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1278                 XML::addElement($doc, $root, "link", "", $attributes);
1279
1280                 /// @TODO We have to find out what this is
1281                 /// $attributes = array("href" => System::baseUrl()."/sup",
1282                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1283                 ///             "type" => "application/json");
1284                 /// XML::addElement($doc, $root, "link", "", $attributes);
1285
1286                 self::hublinks($doc, $root, $owner["nick"]);
1287
1288                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1289                 XML::addElement($doc, $root, "link", "", $attributes);
1290
1291                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1292                 XML::addElement($doc, $root, "link", "", $attributes);
1293
1294                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1295                 XML::addElement($doc, $root, "link", "", $attributes);
1296
1297                 $attributes = ["href" => System::baseUrl() . "/api/statuses/user_timeline/" . $owner["nick"] . ".atom",
1298                         "rel" => "self", "type" => "application/atom+xml"];
1299                 XML::addElement($doc, $root, "link", "", $attributes);
1300
1301                 return $root;
1302         }
1303
1304         /**
1305          * @brief Add the link to the push hubs to the XML document
1306          *
1307          * @param object $doc  XML document
1308          * @param object $root XML root element where the hub links are added
1309          * @param object $nick nick
1310          * @return void
1311          */
1312         public static function hublinks($doc, $root, $nick)
1313         {
1314                 $h = System::baseUrl() . '/pubsubhubbub/'.$nick;
1315                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1316         }
1317
1318         /**
1319          * @brief Adds attachement data to the XML document
1320          *
1321          * @param object $doc  XML document
1322          * @param object $root XML root element where the hub links are added
1323          * @param array  $item Data of the item that is to be posted
1324          * @return void
1325          */
1326         private static function getAttachment($doc, $root, $item)
1327         {
1328                 $o = "";
1329                 $siteinfo = get_attached_data($item["body"]);
1330
1331                 switch ($siteinfo["type"]) {
1332                         case 'photo':
1333                                 $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1334                                 $attributes = ["rel" => "enclosure",
1335                                                 "href" => $siteinfo["image"],
1336                                                 "type" => $imgdata["mime"],
1337                                                 "length" => intval($imgdata["size"])];
1338                                 XML::addElement($doc, $root, "link", "", $attributes);
1339                                 break;
1340                         case 'video':
1341                                 $attributes = ["rel" => "enclosure",
1342                                                 "href" => $siteinfo["url"],
1343                                                 "type" => "text/html; charset=UTF-8",
1344                                                 "length" => "",
1345                                                 "title" => $siteinfo["title"]];
1346                                 XML::addElement($doc, $root, "link", "", $attributes);
1347                                 break;
1348                         default:
1349                                 break;
1350                 }
1351
1352                 if (!Config::get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1353                         $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1354                         $attributes = ["rel" => "enclosure",
1355                                         "href" => $siteinfo["image"],
1356                                         "type" => $imgdata["mime"],
1357                                         "length" => intval($imgdata["size"])];
1358
1359                         XML::addElement($doc, $root, "link", "", $attributes);
1360                 }
1361
1362                 $arr = explode('[/attach],', $item['attach']);
1363                 if (count($arr)) {
1364                         foreach ($arr as $r) {
1365                                 $matches = false;
1366                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1367                                 if ($cnt) {
1368                                         $attributes = ["rel" => "enclosure",
1369                                                         "href" => $matches[1],
1370                                                         "type" => $matches[3]];
1371
1372                                         if (intval($matches[2])) {
1373                                                 $attributes["length"] = intval($matches[2]);
1374                                         }
1375                                         if (trim($matches[4]) != "") {
1376                                                 $attributes["title"] = trim($matches[4]);
1377                                         }
1378                                         XML::addElement($doc, $root, "link", "", $attributes);
1379                                 }
1380                         }
1381                 }
1382         }
1383
1384         /**
1385          * @brief Adds the author element to the XML document
1386          *
1387          * @param object $doc   XML document
1388          * @param array  $owner Contact data of the poster
1389          *
1390          * @return object author element
1391          */
1392         private static function addAuthor($doc, $owner)
1393         {
1394                 $r = q("SELECT `homepage`, `publish` FROM `profile` WHERE `uid` = %d AND `is-default` LIMIT 1", intval($owner["uid"]));
1395                 if (DBM::is_result($r)) {
1396                         $profile = $r[0];
1397                 }
1398                 $author = $doc->createElement("author");
1399                 XML::addElement($doc, $author, "id", $owner["url"]);
1400                 XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_PERSON);
1401                 XML::addElement($doc, $author, "uri", $owner["url"]);
1402                 XML::addElement($doc, $author, "name", $owner["nick"]);
1403                 XML::addElement($doc, $author, "email", $owner["addr"]);
1404                 XML::addElement($doc, $author, "summary", bbcode($owner["about"], false, false, 7));
1405
1406                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1407                 XML::addElement($doc, $author, "link", "", $attributes);
1408
1409                 $attributes = [
1410                                 "rel" => "avatar",
1411                                 "type" => "image/jpeg", // To-Do?
1412                                 "media:width" => 175,
1413                                 "media:height" => 175,
1414                                 "href" => $owner["photo"]];
1415                 XML::addElement($doc, $author, "link", "", $attributes);
1416
1417                 if (isset($owner["thumb"])) {
1418                         $attributes = [
1419                                         "rel" => "avatar",
1420                                         "type" => "image/jpeg", // To-Do?
1421                                         "media:width" => 80,
1422                                         "media:height" => 80,
1423                                         "href" => $owner["thumb"]];
1424                         XML::addElement($doc, $author, "link", "", $attributes);
1425                 }
1426
1427                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1428                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1429                 XML::addElement($doc, $author, "poco:note", bbcode($owner["about"], false, false, 7));
1430
1431                 if (trim($owner["location"]) != "") {
1432                         $element = $doc->createElement("poco:address");
1433                         XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1434                         $author->appendChild($element);
1435                 }
1436
1437                 if (trim($profile["homepage"]) != "") {
1438                         $urls = $doc->createElement("poco:urls");
1439                         XML::addElement($doc, $urls, "poco:type", "homepage");
1440                         XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1441                         XML::addElement($doc, $urls, "poco:primary", "true");
1442                         $author->appendChild($urls);
1443                 }
1444
1445                 if (count($profile)) {
1446                         XML::addElement($doc, $author, "followers", "", ["url" => System::baseUrl()."/viewcontacts/".$owner["nick"]]);
1447                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1448                 }
1449
1450                 if ($profile["publish"]) {
1451                         XML::addElement($doc, $author, "mastodon:scope", "public");
1452                 }
1453                 return $author;
1454         }
1455
1456         /**
1457          * @TODO Picture attachments should look like this:
1458          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1459          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1460          */
1461
1462         /**
1463          * @brief Returns the given activity if present - otherwise returns the "post" activity
1464          *
1465          * @param array $item Data of the item that is to be posted
1466          *
1467          * @return string activity
1468          */
1469         private static function constructVerb($item)
1470         {
1471                 if ($item['verb']) {
1472                         return $item['verb'];
1473                 }
1474
1475                 return ACTIVITY_POST;
1476         }
1477
1478         /**
1479          * @brief Returns the given object type if present - otherwise returns the "note" object type
1480          *
1481          * @param array $item Data of the item that is to be posted
1482          *
1483          * @return string Object type
1484          */
1485         private static function constructObjecttype($item)
1486         {
1487                 if (in_array($item['object-type'], [ACTIVITY_OBJ_NOTE, ACTIVITY_OBJ_COMMENT]))
1488                         return $item['object-type'];
1489                 return ACTIVITY_OBJ_NOTE;
1490         }
1491
1492         /**
1493          * @brief Adds an entry element to the XML document
1494          *
1495          * @param object $doc      XML document
1496          * @param array  $item     Data of the item that is to be posted
1497          * @param array  $owner    Contact data of the poster
1498          * @param bool   $toplevel optional default false
1499          *
1500          * @return object Entry element
1501          */
1502         private static function entry($doc, $item, $owner, $toplevel = false)
1503         {
1504                 $repeated_guid = self::getResharedGuid($item);
1505                 if ($repeated_guid != "") {
1506                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1507                 }
1508
1509                 if ($xml) {
1510                         return $xml;
1511                 }
1512
1513                 if ($item["verb"] == ACTIVITY_LIKE) {
1514                         return self::likeEntry($doc, $item, $owner, $toplevel);
1515                 } elseif (in_array($item["verb"], [ACTIVITY_FOLLOW, NAMESPACE_OSTATUS."/unfollow"])) {
1516                         return self::followEntry($doc, $item, $owner, $toplevel);
1517                 } else {
1518                         return self::noteEntry($doc, $item, $owner, $toplevel);
1519                 }
1520         }
1521
1522         /**
1523          * @brief Adds a source entry to the XML document
1524          *
1525          * @param object $doc     XML document
1526          * @param array  $contact Array of the contact that is added
1527          *
1528          * @return object Source element
1529          */
1530         private static function sourceEntry($doc, $contact)
1531         {
1532                 $source = $doc->createElement("source");
1533                 XML::addElement($doc, $source, "id", $contact["poll"]);
1534                 XML::addElement($doc, $source, "title", $contact["name"]);
1535                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1536                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1537                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1538                 XML::addElement($doc, $source, "updated", datetime_convert("UTC", "UTC", $contact["success_update"]."+00:00", ATOM_TIME));
1539
1540                 return $source;
1541         }
1542
1543         /**
1544          * @brief Fetches contact data from the contact or the gcontact table
1545          *
1546          * @param string $url   URL of the contact
1547          * @param array  $owner Contact data of the poster
1548          *
1549          * @return array Contact array
1550          */
1551         private static function contactEntry($url, $owner)
1552         {
1553                 $r = q(
1554                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1555                         dbesc(normalise_link($url)),
1556                         intval($owner["uid"])
1557                 );
1558                 if (DBM::is_result($r)) {
1559                         $contact = $r[0];
1560                         $contact["uid"] = -1;
1561                 }
1562
1563                 if (!DBM::is_result($r)) {
1564                         $r = q(
1565                                 "SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
1566                                 dbesc(normalise_link($url))
1567                         );
1568                         if (DBM::is_result($r)) {
1569                                 $contact = $r[0];
1570                                 $contact["uid"] = -1;
1571                                 $contact["success_update"] = $contact["updated"];
1572                         }
1573                 }
1574
1575                 if (!DBM::is_result($r)) {
1576                         $contact = owner;
1577                 }
1578
1579                 if (!isset($contact["poll"])) {
1580                         $data = Probe::uri($url);
1581                         $contact["poll"] = $data["poll"];
1582
1583                         if (!$contact["alias"]) {
1584                                 $contact["alias"] = $data["alias"];
1585                         }
1586                 }
1587
1588                 if (!isset($contact["alias"])) {
1589                         $contact["alias"] = $contact["url"];
1590                 }
1591
1592                 return $contact;
1593         }
1594
1595         /**
1596          * @brief Adds an entry element with reshared content
1597          *
1598          * @param object $doc           XML document
1599          * @param array  $item          Data of the item that is to be posted
1600          * @param array  $owner         Contact data of the poster
1601          * @param string $repeated_guid guid
1602          * @param bool   $toplevel      Is it for en entry element (false) or a feed entry (true)?
1603          *
1604          * @return object Entry element
1605          */
1606         private static function reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel)
1607         {
1608                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1609                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1610                 }
1611
1612                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1613
1614                 $r = q(
1615                         "SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' AND NOT `private` AND `network` IN ('%s', '%s', '%s') LIMIT 1",
1616                         intval($owner["uid"]),
1617                         dbesc($repeated_guid),
1618                         dbesc(NETWORK_DFRN),
1619                         dbesc(NETWORK_DIASPORA),
1620                         dbesc(NETWORK_OSTATUS)
1621                 );
1622                 if (DBM::is_result($r)) {
1623                         $repeated_item = $r[0];
1624                 } else {
1625                         return false;
1626                 }
1627                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1628
1629                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1630
1631                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1632
1633                 self::entryContent($doc, $entry, $item, $owner, $title, ACTIVITY_SHARE, false);
1634
1635                 $as_object = $doc->createElement("activity:object");
1636
1637                 XML::addElement($doc, $as_object, "activity:object-type", NAMESPACE_ACTIVITY_SCHEMA."activity");
1638
1639                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1640
1641                 $author = self::addAuthor($doc, $contact);
1642                 $as_object->appendChild($author);
1643
1644                 $as_object2 = $doc->createElement("activity:object");
1645
1646                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1647
1648                 $title = sprintf("New comment by %s", $contact["nick"]);
1649
1650                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1651
1652                 $as_object->appendChild($as_object2);
1653
1654                 self::entryFooter($doc, $as_object, $item, $owner, false);
1655
1656                 $source = self::sourceEntry($doc, $contact);
1657
1658                 $as_object->appendChild($source);
1659
1660                 $entry->appendChild($as_object);
1661
1662                 self::entryFooter($doc, $entry, $item, $owner);
1663
1664                 return $entry;
1665         }
1666
1667         /**
1668          * @brief Adds an entry element with a "like"
1669          *
1670          * @param object $doc      XML document
1671          * @param array  $item     Data of the item that is to be posted
1672          * @param array  $owner    Contact data of the poster
1673          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1674          *
1675          * @return object Entry element with "like"
1676          */
1677         private static function likeEntry($doc, $item, $owner, $toplevel)
1678         {
1679                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1680                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1681                 }
1682
1683                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1684
1685                 $verb = NAMESPACE_ACTIVITY_SCHEMA."favorite";
1686                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1687
1688                 $as_object = $doc->createElement("activity:object");
1689
1690                 $parent = q(
1691                         "SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
1692                         dbesc($item["thr-parent"]),
1693                         intval($item["uid"])
1694                 );
1695                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1696
1697                 XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent[0]));
1698
1699                 self::entryContent($doc, $as_object, $parent[0], $owner, "New entry");
1700
1701                 $entry->appendChild($as_object);
1702
1703                 self::entryFooter($doc, $entry, $item, $owner);
1704
1705                 return $entry;
1706         }
1707
1708         /**
1709          * @brief Adds the person object element to the XML document
1710          *
1711          * @param object $doc     XML document
1712          * @param array  $owner   Contact data of the poster
1713          * @param array  $contact Contact data of the target
1714          *
1715          * @return object author element
1716          */
1717         private static function addPersonObject($doc, $owner, $contact)
1718         {
1719                 $object = $doc->createElement("activity:object");
1720                 XML::addElement($doc, $object, "activity:object-type", ACTIVITY_OBJ_PERSON);
1721
1722                 if ($contact['network'] == NETWORK_PHANTOM) {
1723                         XML::addElement($doc, $object, "id", $contact['url']);
1724                         return $object;
1725                 }
1726
1727                 XML::addElement($doc, $object, "id", $contact["alias"]);
1728                 XML::addElement($doc, $object, "title", $contact["nick"]);
1729
1730                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1731                 XML::addElement($doc, $object, "link", "", $attributes);
1732
1733                 $attributes = [
1734                                 "rel" => "avatar",
1735                                 "type" => "image/jpeg", // To-Do?
1736                                 "media:width" => 175,
1737                                 "media:height" => 175,
1738                                 "href" => $contact["photo"]];
1739                 XML::addElement($doc, $object, "link", "", $attributes);
1740
1741                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1742                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1743
1744                 if (trim($contact["location"]) != "") {
1745                         $element = $doc->createElement("poco:address");
1746                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1747                         $object->appendChild($element);
1748                 }
1749
1750                 return $object;
1751         }
1752
1753         /**
1754          * @brief Adds a follow/unfollow entry element
1755          *
1756          * @param object $doc      XML document
1757          * @param array  $item     Data of the follow/unfollow message
1758          * @param array  $owner    Contact data of the poster
1759          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1760          *
1761          * @return object Entry element
1762          */
1763         private static function followEntry($doc, $item, $owner, $toplevel)
1764         {
1765                 $item["id"] = $item["parent"] = 0;
1766                 $item["created"] = $item["edited"] = date("c");
1767                 $item["private"] = true;
1768
1769                 $contact = Probe::uri($item['follow']);
1770
1771                 if ($contact['alias'] == '') {
1772                         $contact['alias'] = $contact["url"];
1773                 } else {
1774                         $item['follow'] = $contact['alias'];
1775                 }
1776
1777                 $r = q(
1778                         "SELECT `id` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1779                         intval($owner['uid']),
1780                         dbesc(normalise_link($contact["url"]))
1781                 );
1782
1783                 if (DBM::is_result($r)) {
1784                         $connect_id = $r[0]['id'];
1785                 } else {
1786                         $connect_id = 0;
1787                 }
1788
1789                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1790                         $message = t('%s is now following %s.');
1791                         $title = t('following');
1792                         $action = "subscription";
1793                 } else {
1794                         $message = t('%s stopped following %s.');
1795                         $title = t('stopped following');
1796                         $action = "unfollow";
1797                 }
1798
1799                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1800                                 = 'tag:'.get_app()->get_hostname().
1801                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1802                                 ':person:'.$connect_id.':'.$item['created'];
1803
1804                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1805
1806                 self::entryHeader($doc, $entry, $owner, $toplevel);
1807
1808                 self::entryContent($doc, $entry, $item, $owner, $title);
1809
1810                 $object = self::addPersonObject($doc, $owner, $contact);
1811                 $entry->appendChild($object);
1812
1813                 self::entryFooter($doc, $entry, $item, $owner);
1814
1815                 return $entry;
1816         }
1817
1818         /**
1819          * @brief Adds a regular entry element
1820          *
1821          * @param object $doc      XML document
1822          * @param array  $item     Data of the item that is to be posted
1823          * @param array  $owner    Contact data of the poster
1824          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1825          *
1826          * @return object Entry element
1827          */
1828         private static function noteEntry($doc, $item, $owner, $toplevel)
1829         {
1830                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1831                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1832                 }
1833
1834                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1835
1836                 XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1837
1838                 self::entryContent($doc, $entry, $item, $owner, $title);
1839
1840                 self::entryFooter($doc, $entry, $item, $owner);
1841
1842                 return $entry;
1843         }
1844
1845         /**
1846          * @brief Adds a header element to the XML document
1847          *
1848          * @param object $doc      XML document
1849          * @param object $entry    The entry element where the elements are added
1850          * @param array  $owner    Contact data of the poster
1851          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1852          *
1853          * @return string The title for the element
1854          */
1855         private static function entryHeader($doc, &$entry, $owner, $toplevel)
1856         {
1857                 /// @todo Check if this title stuff is really needed (I guess not)
1858                 if (!$toplevel) {
1859                         $entry = $doc->createElement("entry");
1860                         $title = sprintf("New note by %s", $owner["nick"]);
1861                 } else {
1862                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, "entry");
1863
1864                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1865                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1866                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1867                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1868                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
1869                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1870                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1871                         $entry->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1872
1873                         $author = self::addAuthor($doc, $owner);
1874                         $entry->appendChild($author);
1875
1876                         $title = sprintf("New comment by %s", $owner["nick"]);
1877                 }
1878                 return $title;
1879         }
1880
1881         /**
1882          * @brief Adds elements to the XML document
1883          *
1884          * @param object $doc      XML document
1885          * @param object $entry    Entry element where the content is added
1886          * @param array  $item     Data of the item that is to be posted
1887          * @param array  $owner    Contact data of the poster
1888          * @param string $title    Title for the post
1889          * @param string $verb     The activity verb
1890          * @param bool   $complete Add the "status_net" element?
1891          * @return void
1892          */
1893         private static function entryContent($doc, $entry, $item, $owner, $title, $verb = "", $complete = true)
1894         {
1895                 if ($verb == "") {
1896                         $verb = self::constructVerb($item);
1897                 }
1898
1899                 XML::addElement($doc, $entry, "id", $item["uri"]);
1900                 XML::addElement($doc, $entry, "title", $title);
1901
1902                 $body = self::formatPicturePost($item['body']);
1903
1904                 if ($item['title'] != "") {
1905                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1906                 }
1907
1908                 $body = bbcode($body, false, false, 7);
1909
1910                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1911
1912                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1913                                                                 "href" => System::baseUrl()."/display/".$item["guid"]]
1914                 );
1915
1916                 if ($complete && ($item["id"] > 0)) {
1917                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1918                 }
1919
1920                 XML::addElement($doc, $entry, "activity:verb", $verb);
1921
1922                 XML::addElement($doc, $entry, "published", datetime_convert("UTC", "UTC", $item["created"]."+00:00", ATOM_TIME));
1923                 XML::addElement($doc, $entry, "updated", datetime_convert("UTC", "UTC", $item["edited"]."+00:00", ATOM_TIME));
1924         }
1925
1926         /**
1927          * @brief Adds the elements at the foot of an entry to the XML document
1928          *
1929          * @param object $doc      XML document
1930          * @param object $entry    The entry element where the elements are added
1931          * @param array  $item     Data of the item that is to be posted
1932          * @param array  $owner    Contact data of the poster
1933          * @param bool   $complete default true
1934          * @return void
1935          */
1936         private static function entryFooter($doc, $entry, $item, $owner, $complete = true)
1937         {
1938                 $mentioned = [];
1939
1940                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
1941                         $parent = q("SELECT `guid`, `author-link`, `owner-link` FROM `item` WHERE `id` = %d", intval($item["parent"]));
1942                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1943
1944                         $thrparent = q(
1945                                 "SELECT `guid`, `author-link`, `owner-link`, `plink` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
1946                                 intval($owner["uid"]),
1947                                 dbesc($parent_item)
1948                         );
1949                         if ($thrparent) {
1950                                 $mentioned[$thrparent[0]["author-link"]] = $thrparent[0]["author-link"];
1951                                 $mentioned[$thrparent[0]["owner-link"]] = $thrparent[0]["owner-link"];
1952                                 $parent_plink = $thrparent[0]["plink"];
1953                         } else {
1954                                 $mentioned[$parent[0]["author-link"]] = $parent[0]["author-link"];
1955                                 $mentioned[$parent[0]["owner-link"]] = $parent[0]["owner-link"];
1956                                 $parent_plink = System::baseUrl()."/display/".$parent[0]["guid"];
1957                         }
1958
1959                         $attributes = [
1960                                         "ref" => $parent_item,
1961                                         "href" => $parent_plink];
1962                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1963
1964                         $attributes = [
1965                                         "rel" => "related",
1966                                         "href" => $parent_plink];
1967                         XML::addElement($doc, $entry, "link", "", $attributes);
1968                 }
1969
1970                 if (intval($item["parent"]) > 0) {
1971                         $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
1972                         $conversation_uri = $conversation_href;
1973
1974                         if (isset($parent_item)) {
1975                                 $r = dba::fetch_first("SELECT `conversation-uri`, `conversation-href` FROM `conversation` WHERE `item-uri` = ?", $parent_item);
1976                                 if (DBM::is_result($r)) {
1977                                         if ($r['conversation-uri'] != '') {
1978                                                 $conversation_uri = $r['conversation-uri'];
1979                                         }
1980                                         if ($r['conversation-href'] != '') {
1981                                                 $conversation_href = $r['conversation-href'];
1982                                         }
1983                                 }
1984                         }
1985
1986                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
1987
1988                         $attributes = [
1989                                         "href" => $conversation_href,
1990                                         "local_id" => $item["parent"],
1991                                         "ref" => $conversation_uri];
1992
1993                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1994                 }
1995
1996                 $tags = item_getfeedtags($item);
1997
1998                 if (count($tags)) {
1999                         foreach ($tags as $t) {
2000                                 if ($t[0] == "@") {
2001                                         $mentioned[$t[1]] = $t[1];
2002                                 }
2003                         }
2004                 }
2005
2006                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
2007                 $newmentions = [];
2008                 foreach ($mentioned as $mention) {
2009                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
2010                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
2011                 }
2012                 $mentioned = $newmentions;
2013
2014                 foreach ($mentioned as $mention) {
2015                         $r = q(
2016                                 "SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
2017                                 intval($owner["uid"]),
2018                                 dbesc(normalise_link($mention))
2019                         );
2020                         if ($r[0]["forum"] || $r[0]["prv"]) {
2021                                 XML::addElement($doc, $entry, "link", "",
2022                                         [
2023                                                 "rel" => "mentioned",
2024                                                 "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
2025                                                 "href" => $mention]
2026                                 );
2027                         } else {
2028                                 XML::addElement($doc, $entry, "link", "",
2029                                         [
2030                                                 "rel" => "mentioned",
2031                                                 "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
2032                                                 "href" => $mention]
2033                                 );
2034                         }
2035                 }
2036
2037                 if (!$item["private"]) {
2038                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2039                                                                         "href" => "http://activityschema.org/collection/public"]);
2040                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2041                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2042                                                                         "href" => "http://activityschema.org/collection/public"]);
2043                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2044                 }
2045
2046                 if (count($tags)) {
2047                         foreach ($tags as $t) {
2048                                 if ($t[0] != "@") {
2049                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2050                                 }
2051                         }
2052                 }
2053
2054                 self::getAttachment($doc, $entry, $item);
2055
2056                 if ($complete && ($item["id"] > 0)) {
2057                         $app = $item["app"];
2058                         if ($app == "") {
2059                                 $app = "web";
2060                         }
2061
2062                         $attributes = ["local_id" => $item["id"], "source" => $app];
2063
2064                         if (isset($parent["id"])) {
2065                                 $attributes["repeat_of"] = $parent["id"];
2066                         }
2067
2068                         if ($item["coord"] != "") {
2069                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2070                         }
2071
2072                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2073                 }
2074         }
2075
2076         /**
2077          * Creates the XML feed for a given nickname
2078          *
2079          * Supported filters:
2080          * - activity (default): all the public posts
2081          * - posts: all the public top-level posts
2082          * - comments: all the public replies
2083          *
2084          * Updates the provided last_update parameter if the result comes from the
2085          * cache or it is empty
2086          *
2087          * @brief Creates the XML feed for a given nickname
2088          *
2089          * @param string  $owner_nick  Nickname of the feed owner
2090          * @param string  $last_update Date of the last update
2091          * @param integer $max_items   Number of maximum items to fetch
2092          * @param string  $filter      Feed items filter (activity, posts or comments)
2093          * @param boolean $nocache     Wether to bypass caching
2094          *
2095          * @return string XML feed
2096          */
2097         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2098         {
2099                 $stamp = microtime(true);
2100
2101                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2102
2103                 $previous_created = $last_update;
2104
2105                 $result = Cache::get($cachekey);
2106                 if (!$nocache && !is_null($result)) {
2107                         logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', LOGGER_DEBUG);
2108                         $last_update = $result['last_update'];
2109                         return $result['feed'];
2110                 }
2111
2112                 $owner = dba::fetch_first(
2113                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
2114                                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
2115                                 WHERE `contact`.`self` AND `user`.`nickname` = ? LIMIT 1",
2116                         $owner_nick
2117                 );
2118                 if (!DBM::is_result($owner)) {
2119                         return;
2120                 }
2121
2122                 if (!strlen($last_update)) {
2123                         $last_update = 'now -30 days';
2124                 }
2125
2126                 $check_date = datetime_convert('UTC', 'UTC', $last_update, 'Y-m-d H:i:s');
2127                 $authorid = Contact::getIdForURL($owner["url"], 0);
2128
2129                 $sql_extra = '';
2130                 if ($filter === 'posts') {
2131                         $sql_extra .= ' AND `item`.`id` = `item`.`parent` ';
2132                 }
2133
2134                 if ($filter === 'comments') {
2135                         $sql_extra .= sprintf(" AND `item`.`object-type` = '%s' ", dbesc(ACTIVITY_OBJ_COMMENT));
2136                 }
2137
2138                 $items = q(
2139                         "SELECT `item`.*, `item`.`id` AS `item_id` FROM `item` USE INDEX (`uid_contactid_created`)
2140                                 STRAIGHT_JOIN `thread` ON `thread`.`iid` = `item`.`parent`
2141                                 WHERE `item`.`uid` = %d
2142                                 AND `item`.`contact-id` = %d
2143                                 AND `item`.`author-id` = %d
2144                                 AND `item`.`created` > '%s'
2145                                 AND NOT `item`.`deleted`
2146                                 AND NOT `item`.`private`
2147                                 AND `thread`.`network` IN ('%s', '%s')
2148                                 $sql_extra
2149                                 ORDER BY `item`.`created` DESC LIMIT %d",
2150                         intval($owner["uid"]),
2151                         intval($owner["id"]),
2152                         intval($authorid),
2153                         dbesc($check_date),
2154                         dbesc(NETWORK_OSTATUS),
2155                         dbesc(NETWORK_DFRN),
2156                         intval($max_items)
2157                 );
2158
2159                 $doc = new DOMDocument('1.0', 'utf-8');
2160                 $doc->formatOutput = true;
2161
2162                 $root = self::addHeader($doc, $owner, $filter);
2163
2164                 foreach ($items as $item) {
2165                         if (Config::get('system', 'ostatus_debug')) {
2166                                 $item['body'] .= '🍼';
2167                         }
2168                         $entry = self::entry($doc, $item, $owner);
2169                         $root->appendChild($entry);
2170
2171                         if ($last_update < $item['created']) {
2172                                 $last_update = $item['created'];
2173                         }
2174                 }
2175
2176                 $feeddata = trim($doc->saveXML());
2177
2178                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2179                 Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
2180
2181                 logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, LOGGER_DEBUG);
2182
2183                 return $feeddata;
2184         }
2185
2186         /**
2187          * @brief Creates the XML for a salmon message
2188          *
2189          * @param array $item  Data of the item that is to be posted
2190          * @param array $owner Contact data of the poster
2191          *
2192          * @return string XML for the salmon
2193          */
2194         public static function salmon($item, $owner)
2195         {
2196                 $doc = new DOMDocument('1.0', 'utf-8');
2197                 $doc->formatOutput = true;
2198
2199                 if (Config::get('system', 'ostatus_debug')) {
2200                         $item['body'] .= '🐟';
2201                 }
2202
2203                 $entry = self::entry($doc, $item, $owner, true);
2204
2205                 $doc->appendChild($entry);
2206
2207                 return trim($doc->saveXML());
2208         }
2209 }