src/Protocol/OStatus.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Protocol;
  23
  24 use DOMDocument;
  25 use DOMXPath;
  26 use Friendica\Content\PageInfo;
  27 use Friendica\Content\Text\BBCode;
  28 use Friendica\Content\Text\HTML;
  29 use Friendica\Core\Cache\Duration;
  30 use Friendica\Core\Logger;
  31 use Friendica\Core\Protocol;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Model\APContact;
  35 use Friendica\Model\Contact;
  36 use Friendica\Model\Conversation;
  37 use Friendica\Model\Item;
  38 use Friendica\Model\ItemURI;
  39 use Friendica\Model\Post;
  40 use Friendica\Model\Tag;
  41 use Friendica\Model\User;
  42 use Friendica\Network\Probe;
  43 use Friendica\Util\DateTimeFormat;
  44 use Friendica\Util\Images;
  45 use Friendica\Util\Proxy as ProxyUtils;
  46 use Friendica\Util\Strings;
  47 use Friendica\Util\XML;
  48
  49 require_once 'mod/share.php';
  50 require_once 'include/api.php';
  51
  52 /**
  53  * This class contain functions for the OStatus protocol
  54  */
  55 class OStatus
  56 {
  57         private static $itemlist;
  58         private static $conv_list = [];
  59
  60         /**
  61          * Fetches author data
  62          *
  63          * @param DOMXPath $xpath     The xpath object
  64          * @param object   $context   The xml context of the author details
  65          * @param array    $importer  user record of the importing user
  66          * @param array    $contact   Called by reference, will contain the fetched contact
  67          * @param bool     $onlyfetch Only fetch the header without updating the contact entries
  68          *
  69          * @return array Array of author related entries for the item
  70          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  71          * @throws \ImagickException
  72          */
  73         private static function fetchAuthor(DOMXPath $xpath, $context, array $importer, array &$contact = null, $onlyfetch)
  74         {
  75                 $author = [];
  76                 $author["author-link"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
  77                 $author["author-name"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $context);
  78                 $addr = XML::getFirstNodeValue($xpath, 'atom:author/atom:email/text()', $context);
  79
  80                 $aliaslink = $author["author-link"];
  81
  82                 $alternate_item = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0);
  83                 if (is_object($alternate_item)) {
  84                         foreach ($alternate_item->attributes as $attributes) {
  85                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
  86                                         $author["author-link"] = $attributes->textContent;
  87                                 }
  88                         }
  89                 }
  90                 $author["author-id"] = Contact::getIdForURL($author["author-link"]);
  91
  92                 $author['contact-id'] = ($contact['id'] ?? 0) ?: $author['author-id'];
  93
  94                 $contact = [];
  95
  96 /*
  97                 This here would be better, but we would get problems with contacts from the statusnet addon
  98                 This is kept here as a reminder for the future
  99
 100                 $cid = Contact::getIdForURL($author["author-link"], $importer["uid"]);
 101                 if ($cid) {
 102                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
 103                 }
 104 */
 105                 if ($aliaslink != '') {
 106                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ? AND `rel` IN (?, ?)",
 107                                         $importer["uid"], $aliaslink, Protocol::STATUSNET,
 108                                         Contact::SHARING, Contact::FRIEND];
 109                         $contact = DBA::selectFirst('contact', [], $condition);
 110                 }
 111
 112                 if (!DBA::isResult($contact) && $author["author-link"] != '') {
 113                         if ($aliaslink == "") {
 114                                 $aliaslink = $author["author-link"];
 115                         }
 116
 117                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ? AND `rel` IN (?, ?)",
 118                                         $importer["uid"], Strings::normaliseLink($author["author-link"]), Strings::normaliseLink($aliaslink),
 119                                         Protocol::STATUSNET, Contact::SHARING, Contact::FRIEND];
 120                         $contact = DBA::selectFirst('contact', [], $condition);
 121                 }
 122
 123                 if (!DBA::isResult($contact) && ($addr != '')) {
 124                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ? AND `rel` IN (?, ?)",
 125                                         $importer["uid"], $addr, Protocol::STATUSNET,
 126                                         Contact::SHARING, Contact::FRIEND];
 127                         $contact = DBA::selectFirst('contact', [], $condition);
 128                 }
 129
 130                 if (DBA::isResult($contact)) {
 131                         if ($contact['blocked']) {
 132                                 $contact['id'] = -1;
 133                         } elseif (!empty(APContact::getByURL($contact['url'], false))) {
 134                                 ActivityPub\Receiver::switchContact($contact['id'], $importer['uid'], $contact['url']);
 135                         }
 136                         $author["contact-id"] = $contact["id"];
 137                 }
 138
 139                 $avatarlist = [];
 140                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 141                 foreach ($avatars as $avatar) {
 142                         $href = "";
 143                         $width = 0;
 144                         foreach ($avatar->attributes as $attributes) {
 145                                 if ($attributes->name == "href") {
 146                                         $href = $attributes->textContent;
 147                                 }
 148                                 if ($attributes->name == "width") {
 149                                         $width = $attributes->textContent;
 150                                 }
 151                         }
 152                         if ($href != "") {
 153                                 $avatarlist[$width] = $href;
 154                         }
 155                 }
 156                 if (count($avatarlist) > 0) {
 157                         krsort($avatarlist);
 158                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 159                 }
 160
 161                 $displayname = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 162                 if ($displayname != "") {
 163                         $author["author-name"] = $displayname;
 164                 }
 165
 166                 $author["owner-id"] = $author["author-id"];
 167
 168                 // Only update the contacts if it is an OStatus contact
 169                 if (DBA::isResult($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact["network"] == Protocol::OSTATUS)) {
 170
 171                         // Update contact data
 172                         $current = $contact;
 173                         unset($current['name-date']);
 174
 175                         // This query doesn't seem to work
 176                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 177                         // if ($value != "")
 178                         //      $contact["notify"] = $value;
 179
 180                         // This query doesn't seem to work as well - I hate these queries
 181                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 182                         // if ($value != "")
 183                         //      $contact["poll"] = $value;
 184
 185                         $contact['url'] = $author["author-link"];
 186                         $contact['nurl'] = Strings::normaliseLink($contact['url']);
 187
 188                         $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
 189                         if ($value != "") {
 190                                 $contact["alias"] = $value;
 191                         }
 192
 193                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 194                         if ($value != "") {
 195                                 $contact["name"] = $value;
 196                         }
 197
 198                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 199                         if ($value != "") {
 200                                 $contact["nick"] = $value;
 201                         }
 202
 203                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()', $context);
 204                         if ($value != "") {
 205                                 $contact["about"] = HTML::toBBCode($value);
 206                         }
 207
 208                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()', $context);
 209                         if ($value != "") {
 210                                 $contact["location"] = $value;
 211                         }
 212
 213                         $contact['name-date'] = DateTimeFormat::utcNow();
 214
 215                         DBA::update('contact', $contact, ['id' => $contact["id"]], $current);
 216
 217                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 218                                 Logger::log("Update profile picture for contact ".$contact["id"], Logger::DEBUG);
 219                                 Contact::updateAvatar($contact["id"], $author["author-avatar"]);
 220                         }
 221
 222                         // Ensure that we are having this contact (with uid=0)
 223                         $cid = Contact::getIdForURL($aliaslink);
 224
 225                         if ($cid) {
 226                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 227                                 $old_contact = DBA::selectFirst('contact', $fields, ['id' => $cid]);
 228
 229                                 // Update it with the current values
 230                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 231                                                 'nurl' => Strings::normaliseLink($author["author-link"]),
 232                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 233                                                 'about' => $contact["about"], 'location' => $contact["location"],
 234                                                 'success_update' => DateTimeFormat::utcNow(), 'last-update' => DateTimeFormat::utcNow()];
 235
 236                                 DBA::update('contact', $fields, ['id' => $cid], $old_contact);
 237
 238                                 // Update the avatar
 239                                 if (!empty($author["author-avatar"])) {
 240                                         Contact::updateAvatar($cid, $author["author-avatar"]);
 241                                 }
 242                         }
 243                 } elseif (empty($contact["network"]) || ($contact["network"] != Protocol::DFRN)) {
 244                         $contact = [];
 245                 }
 246
 247                 return $author;
 248         }
 249
 250         /**
 251          * Fetches author data from a given XML string
 252          *
 253          * @param string $xml      The XML
 254          * @param array  $importer user record of the importing user
 255          *
 256          * @return array Array of author related entries for the item
 257          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 258          * @throws \ImagickException
 259          */
 260         public static function salmonAuthor($xml, array $importer)
 261         {
 262                 if ($xml == "") {
 263                         return;
 264                 }
 265
 266                 $doc = new DOMDocument();
 267                 @$doc->loadXML($xml);
 268
 269                 $xpath = new DOMXPath($doc);
 270                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 271                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 272                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 273                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 274                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 275                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 276                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 277                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 278
 279                 $contact = ["id" => 0];
 280
 281                 // Fetch the first author
 282                 $authordata = $xpath->query('//author')->item(0);
 283                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, true);
 284                 return $author;
 285         }
 286
 287         /**
 288          * Read attributes from element
 289          *
 290          * @param object $element Element object
 291          *
 292          * @return array attributes
 293          */
 294         private static function readAttributes($element)
 295         {
 296                 $attribute = [];
 297
 298                 foreach ($element->attributes as $attributes) {
 299                         $attribute[$attributes->name] = $attributes->textContent;
 300                 }
 301
 302                 return $attribute;
 303         }
 304
 305         /**
 306          * Imports an XML string containing OStatus elements
 307          *
 308          * @param string $xml      The XML
 309          * @param array  $importer user record of the importing user
 310          * @param array  $contact  contact
 311          * @param string $hub      Called by reference, returns the fetched hub data
 312          * @return void
 313          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 314          * @throws \ImagickException
 315          */
 316         public static function import($xml, array $importer, array &$contact, &$hub)
 317         {
 318                 self::process($xml, $importer, $contact, $hub);
 319         }
 320
 321         /**
 322          * Internal feed processing
 323          *
 324          * @param string  $xml        The XML
 325          * @param array   $importer   user record of the importing user
 326          * @param array   $contact    contact
 327          * @param string  $hub        Called by reference, returns the fetched hub data
 328          * @param boolean $stored     Is the post fresh imported or from the database?
 329          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 330          *
 331          * @return boolean Could the XML be processed?
 332          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 333          * @throws \ImagickException
 334          */
 335         private static function process($xml, array $importer, array &$contact = null, &$hub, $stored = false, $initialize = true)
 336         {
 337                 if ($initialize) {
 338                         self::$itemlist = [];
 339                         self::$conv_list = [];
 340                 }
 341
 342                 Logger::log('Import OStatus message for user ' . $importer['uid'], Logger::DEBUG);
 343
 344                 if ($xml == "") {
 345                         return false;
 346                 }
 347                 $doc = new DOMDocument();
 348                 @$doc->loadXML($xml);
 349
 350                 $xpath = new DOMXPath($doc);
 351                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 352                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 353                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 354                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 355                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 356                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 357                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 358                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 359
 360                 $hub = "";
 361                 $hub_items = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0);
 362                 if (is_object($hub_items)) {
 363                         $hub_attributes = $hub_items->attributes;
 364                         if (is_object($hub_attributes)) {
 365                                 foreach ($hub_attributes as $hub_attribute) {
 366                                         if ($hub_attribute->name == "href") {
 367                                                 $hub = $hub_attribute->textContent;
 368                                                 Logger::log("Found hub ".$hub, Logger::DEBUG);
 369                                         }
 370                                 }
 371                         }
 372                 }
 373
 374                 $header = [];
 375                 $header["uid"] = $importer["uid"];
 376                 $header["network"] = Protocol::OSTATUS;
 377                 $header["wall"] = 0;
 378                 $header["origin"] = 0;
 379                 $header["gravity"] = GRAVITY_COMMENT;
 380
 381                 if (!is_object($doc->firstChild) || empty($doc->firstChild->tagName)) {
 382                         return false;
 383                 }
 384
 385                 $first_child = $doc->firstChild->tagName;
 386
 387                 if ($first_child == "feed") {
 388                         $entries = $xpath->query('/atom:feed/atom:entry');
 389                 } else {
 390                         $entries = $xpath->query('/atom:entry');
 391                 }
 392
 393                 if ($entries->length == 1) {
 394                         // We reformat the XML to make it better readable
 395                         $doc2 = new DOMDocument();
 396                         $doc2->loadXML($xml);
 397                         $doc2->preserveWhiteSpace = false;
 398                         $doc2->formatOutput = true;
 399                         $xml2 = $doc2->saveXML();
 400
 401                         $header["protocol"] = Conversation::PARCEL_SALMON;
 402                         $header["source"] = $xml2;
 403                 } elseif (!$initialize) {
 404                         return false;
 405                 }
 406
 407                 // Fetch the first author
 408                 $authordata = $xpath->query('//author')->item(0);
 409                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 410
 411                 // Reverse the order of the entries
 412                 $entrylist = [];
 413
 414                 foreach ($entries as $entry) {
 415                         $entrylist[] = $entry;
 416                 }
 417
 418                 foreach (array_reverse($entrylist) as $entry) {
 419                         // fetch the author
 420                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 421
 422                         if ($authorelement->length == 0) {
 423                                 $authorelement = $xpath->query('atom:author', $entry);
 424                         }
 425
 426                         if ($authorelement->length > 0) {
 427                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 428                         }
 429
 430                         $item = array_merge($header, $author);
 431
 432                         $item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 433                         $item['uri-id'] = ItemURI::insert(['uri' => $item['uri']]);
 434
 435                         $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
 436
 437                         // Delete a message
 438                         if (in_array($item["verb"], ['qvitter-delete-notice', Activity::DELETE, 'delete'])) {
 439                                 self::deleteNotice($item);
 440                                 continue;
 441                         }
 442
 443                         if (in_array($item["verb"], [Activity::O_UNFAVOURITE, Activity::UNFAVORITE])) {
 444                                 // Ignore "Unfavorite" message
 445                                 Logger::log("Ignore unfavorite message ".print_r($item, true), Logger::DEBUG);
 446                                 continue;
 447                         }
 448
 449                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 450                         if (Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 451                                 Logger::log('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 452                                 continue;
 453                         } else {
 454                                 Logger::log('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 455                         }
 456
 457                         if ($item["verb"] == Activity::JOIN) {
 458                                 // ignore "Join" messages
 459                                 Logger::log("Ignore join message ".print_r($item, true), Logger::DEBUG);
 460                                 continue;
 461                         }
 462
 463                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 464                                 // ignore mastodon "block" messages
 465                                 Logger::log("Ignore block message ".print_r($item, true), Logger::DEBUG);
 466                                 continue;
 467                         }
 468
 469                         if ($item["verb"] == Activity::FOLLOW) {
 470                                 Contact::addRelationship($importer, $contact, $item);
 471                                 continue;
 472                         }
 473
 474                         if ($item["verb"] == Activity::O_UNFOLLOW) {
 475                                 $dummy = null;
 476                                 Contact::removeFollower($importer, $contact, $item, $dummy);
 477                                 continue;
 478                         }
 479
 480                         if ($item["verb"] == Activity::FAVORITE) {
 481                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 482                                 Logger::log("Favorite ".$orig_uri." ".print_r($item, true));
 483
 484                                 $item["verb"] = Activity::LIKE;
 485                                 $item["parent-uri"] = $orig_uri;
 486                                 $item["gravity"] = GRAVITY_ACTIVITY;
 487                                 $item["object-type"] = Activity\ObjectType::NOTE;
 488                         }
 489
 490                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 491                         if (!in_array($item["verb"], [Activity::POST, Activity::LIKE, Activity::SHARE])) {
 492                                 Logger::log("Unhandled verb ".$item["verb"]." ".print_r($item, true), Logger::DEBUG);
 493                         }
 494
 495                         self::processPost($xpath, $entry, $item, $importer);
 496
 497                         if ($initialize && (count(self::$itemlist) > 0)) {
 498                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 499                                         // We will import it everytime, when it is started by our contacts
 500                                         $valid = Contact::isSharingByURL(self::$itemlist[0]['author-link'], self::$itemlist[0]['uid']);
 501
 502                                         if (!$valid) {
 503                                                 // If not, then it depends on this setting
 504                                                 $valid = ((self::$itemlist[0]['uid'] == 0) || !DI::pConfig()->get(self::$itemlist[0]['uid'], 'system', 'accept_only_sharer', false));
 505                                                 if ($valid) {
 506                                                         Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported due to the system settings.", Logger::DEBUG);
 507                                                 }
 508                                         } else {
 509                                                 Logger::log("Item with uri ".self::$itemlist[0]['uri']." belongs to a contact (".self::$itemlist[0]['contact-id']."). It will be imported.", Logger::DEBUG);
 510                                         }
 511                                         if ($valid) {
 512                                                 // Never post a thread when the only interaction by our contact was a like
 513                                                 $valid = false;
 514                                                 $verbs = [Activity::POST, Activity::SHARE];
 515                                                 foreach (self::$itemlist as $item) {
 516                                                         if (in_array($item['verb'], $verbs) && Contact::isSharingByURL($item['author-link'], $item['uid'])) {
 517                                                                 $valid = true;
 518                                                         }
 519                                                 }
 520                                                 if ($valid) {
 521                                                         Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported since the thread contains posts or shares.", Logger::DEBUG);
 522                                                 }
 523                                         }
 524                                 } else {
 525                                         // But we will only import complete threads
 526                                         $valid = Item::exists(['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 527                                         if ($valid) {
 528                                                 Logger::log("Item with uri ".self::$itemlist[0]["uri"]." belongs to parent ".self::$itemlist[0]['parent-uri']." of user ".$importer["uid"].". It will be imported.", Logger::DEBUG);
 529                                         }
 530                                 }
 531
 532                                 if ($valid) {
 533                                         $default_contact = 0;
 534                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 535                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 536                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 537                                                 } else {
 538                                                         $default_contact = $item['contact-id'];
 539                                                 }
 540                                         }
 541                                         foreach (self::$itemlist as $item) {
 542                                                 $found = Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 543                                                 if ($found) {
 544                                                         Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", Logger::DEBUG);
 545                                                 } elseif ($item['contact-id'] < 0) {
 546                                                         Logger::log("Item with uri ".$item["uri"]." is from a blocked contact.", Logger::DEBUG);
 547                                                 } else {
 548                                                         $ret = Item::insert($item);
 549                                                         Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 550                                                 }
 551                                         }
 552                                 }
 553                                 self::$itemlist = [];
 554                         }
 555                         Logger::log('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 556                 }
 557                 return true;
 558         }
 559
 560         /**
 561          * Removes notice item from database
 562          *
 563          * @param array $item item
 564          * @return void
 565          * @throws \Exception
 566          */
 567         private static function deleteNotice(array $item)
 568         {
 569                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'uri' => $item['uri']];
 570                 if (!Item::exists($condition)) {
 571                         Logger::log('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it.");
 572                         return;
 573                 }
 574
 575                 Item::markForDeletion($condition);
 576
 577                 Logger::log('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 578         }
 579
 580         /**
 581          * Processes the XML for a post
 582          *
 583          * @param DOMXPath $xpath    The xpath object
 584          * @param object   $entry    The xml entry that is processed
 585          * @param array    $item     The item array
 586          * @param array    $importer user record of the importing user
 587          * @return void
 588          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 589          * @throws \ImagickException
 590          */
 591         private static function processPost(DOMXPath $xpath, $entry, array &$item, array $importer)
 592         {
 593                 $item["body"] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 594                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 595                 if (($item["object-type"] == Activity\ObjectType::BOOKMARK) || ($item["object-type"] == Activity\ObjectType::EVENT)) {
 596                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 597                         $item["body"] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 598                 } elseif ($item["object-type"] == Activity\ObjectType::QUESTION) {
 599                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 600                 }
 601
 602                 $item["created"] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 603                 $item["edited"] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 604                 $item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 605
 606                 $conv = $xpath->query('ostatus:conversation', $entry);
 607                 if (is_object($conv->item(0))) {
 608                         foreach ($conv->item(0)->attributes as $attributes) {
 609                                 if ($attributes->name == "ref") {
 610                                         $item['conversation-uri'] = $attributes->textContent;
 611                                 }
 612                                 if ($attributes->name == "href") {
 613                                         $item['conversation-href'] = $attributes->textContent;
 614                                 }
 615                         }
 616                 }
 617
 618                 $related = "";
 619
 620                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 621                 if (is_object($inreplyto->item(0))) {
 622                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 623                                 if ($attributes->name == "ref") {
 624                                         $item["parent-uri"] = $attributes->textContent;
 625                                 }
 626                                 if ($attributes->name == "href") {
 627                                         $related = $attributes->textContent;
 628                                 }
 629                         }
 630                 }
 631
 632                 $georsspoint = $xpath->query('georss:point', $entry);
 633                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 634                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 635                 }
 636
 637                 $categories = $xpath->query('atom:category', $entry);
 638                 if ($categories) {
 639                         foreach ($categories as $category) {
 640                                 foreach ($category->attributes as $attributes) {
 641                                         if ($attributes->name == 'term') {
 642                                                 // Store the hashtag
 643                                                 Tag::store($item['uri-id'], Tag::HASHTAG, $attributes->textContent);
 644                                         }
 645                                 }
 646                         }
 647                 }
 648
 649                 $self = '';
 650                 $add_body = '';
 651
 652                 $links = $xpath->query('atom:link', $entry);
 653                 if ($links) {
 654                         $link_data = self::processLinks($links, $item);
 655                         $self = $link_data['self'];
 656                         $add_body = $link_data['add_body'];
 657                 }
 658
 659                 $repeat_of = "";
 660
 661                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 662                 if ($notice_info && ($notice_info->length > 0)) {
 663                         foreach ($notice_info->item(0)->attributes as $attributes) {
 664                                 if ($attributes->name == "source") {
 665                                         $item["app"] = strip_tags($attributes->textContent);
 666                                 }
 667                                 if ($attributes->name == "repeat_of") {
 668                                         $repeat_of = $attributes->textContent;
 669                                 }
 670                         }
 671                 }
 672                 // Is it a repeated post?
 673                 if (($repeat_of != "") || ($item["verb"] == Activity::SHARE)) {
 674                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 675                         if (!empty($link_data['add_body'])) {
 676                                 $add_body .= $link_data['add_body'];
 677                         }
 678                 }
 679
 680                 $item["body"] .= $add_body;
 681
 682                 // Only add additional data when there is no picture in the post
 683                 if (!strstr($item["body"], '[/img]')) {
 684                         $item["body"] = PageInfo::searchAndAppendToBody($item["body"]);
 685                 }
 686
 687                 Tag::storeFromBody($item['uri-id'], $item['body']);
 688
 689                 // Mastodon Content Warning
 690                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 691                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 692                         if (!empty($clear_text)) {
 693                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 694                         }
 695                 }
 696
 697                 if (($self != '') && empty($item['protocol'])) {
 698                         self::fetchSelf($self, $item);
 699                 }
 700
 701                 if (!empty($item["conversation-href"])) {
 702                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 703                 }
 704
 705                 if (isset($item["parent-uri"])) {
 706                         if (!Item::exists(['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 707                                 if ($related != '') {
 708                                         self::fetchRelated($related, $item["parent-uri"], $importer);
 709                                 }
 710                         } else {
 711                                 Logger::log('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 712                         }
 713                 } else {
 714                         $item["parent-uri"] = $item["uri"];
 715                         $item["gravity"] = GRAVITY_PARENT;
 716                 }
 717
 718                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 719                         $item = Conversation::insert($item);
 720                 }
 721
 722                 self::$itemlist[] = $item;
 723         }
 724
 725         /**
 726          * Fetch the conversation for posts
 727          *
 728          * @param string $conversation     The link to the conversation
 729          * @param string $conversation_uri The conversation in "uri" format
 730          * @return void
 731          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 732          */
 733         private static function fetchConversation($conversation, $conversation_uri)
 734         {
 735                 // Ensure that we only store a conversation once in a process
 736                 if (isset(self::$conv_list[$conversation])) {
 737                         return;
 738                 }
 739
 740                 self::$conv_list[$conversation] = true;
 741
 742                 $curlResult = DI::httpRequest()->get($conversation, ['accept_content' => 'application/atom+xml, text/html']);
 743
 744                 if (!$curlResult->isSuccess()) {
 745                         return;
 746                 }
 747
 748                 $xml = '';
 749
 750                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 751                         $xml = $curlResult->getBody();
 752                 }
 753
 754                 if ($xml == '') {
 755                         $doc = new DOMDocument();
 756                         if (!@$doc->loadHTML($curlResult->getBody())) {
 757                                 return;
 758                         }
 759                         $xpath = new DOMXPath($doc);
 760
 761                         $links = $xpath->query('//link');
 762                         if ($links) {
 763                                 $file = '';
 764                                 foreach ($links as $link) {
 765                                         $attribute = self::readAttributes($link);
 766                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 767                                                 $file = $attribute['href'];
 768                                         }
 769                                 }
 770                                 if ($file != '') {
 771                                         $conversation_atom = DI::httpRequest()->get($attribute['href']);
 772
 773                                         if ($conversation_atom->isSuccess()) {
 774                                                 $xml = $conversation_atom->getBody();
 775                                         }
 776                                 }
 777                         }
 778                 }
 779
 780                 if ($xml == '') {
 781                         return;
 782                 }
 783
 784                 self::storeConversation($xml, $conversation, $conversation_uri);
 785         }
 786
 787         /**
 788          * Store a feed in several conversation entries
 789          *
 790          * @param string $xml              The feed
 791          * @param string $conversation     conversation
 792          * @param string $conversation_uri conversation uri
 793          * @return void
 794          * @throws \Exception
 795          */
 796         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 797         {
 798                 $doc = new DOMDocument();
 799                 @$doc->loadXML($xml);
 800
 801                 $xpath = new DOMXPath($doc);
 802                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 803                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 804                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 805
 806                 $entries = $xpath->query('/atom:feed/atom:entry');
 807
 808                 // Now store the entries
 809                 foreach ($entries as $entry) {
 810                         $doc2 = new DOMDocument();
 811                         $doc2->preserveWhiteSpace = false;
 812                         $doc2->formatOutput = true;
 813
 814                         $conv_data = [];
 815
 816                         $conv_data['protocol'] = Conversation::PARCEL_SPLIT_CONVERSATION;
 817                         $conv_data['network'] = Protocol::OSTATUS;
 818                         $conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 819
 820                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 821                         if (is_object($inreplyto->item(0))) {
 822                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 823                                         if ($attributes->name == "ref") {
 824                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 825                                         }
 826                                 }
 827                         }
 828
 829                         $conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 830
 831                         $conv = $xpath->query('ostatus:conversation', $entry);
 832                         if (is_object($conv->item(0))) {
 833                                 foreach ($conv->item(0)->attributes as $attributes) {
 834                                         if ($attributes->name == "ref") {
 835                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 836                                         }
 837                                         if ($attributes->name == "href") {
 838                                                 $conv_data['conversation-href'] = $attributes->textContent;
 839                                         }
 840                                 }
 841                         }
 842
 843                         if ($conversation != '') {
 844                                 $conv_data['conversation-uri'] = $conversation;
 845                         }
 846
 847                         if ($conversation_uri != '') {
 848                                 $conv_data['conversation-uri'] = $conversation_uri;
 849                         }
 850
 851                         $entry = $doc2->importNode($entry, true);
 852
 853                         $doc2->appendChild($entry);
 854
 855                         $conv_data['source'] = $doc2->saveXML();
 856
 857                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => Conversation::PARCEL_FEED];
 858                         if (DBA::exists('conversation', $condition)) {
 859                                 Logger::log('Delete deprecated entry for URI '.$conv_data['uri'], Logger::DEBUG);
 860                                 DBA::delete('conversation', ['item-uri' => $conv_data['uri']]);
 861                         }
 862
 863                         Logger::log('Store conversation data for uri '.$conv_data['uri'], Logger::DEBUG);
 864                         Conversation::insert($conv_data);
 865                 }
 866         }
 867
 868         /**
 869          * Fetch the own post so that it can be stored later
 870          *
 871          * We want to store the original data for later processing.
 872          * This function is meant for cases where we process a feed with multiple entries.
 873          * In that case we need to fetch the single posts here.
 874          *
 875          * @param string $self The link to the self item
 876          * @param array  $item The item array
 877          * @return void
 878          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 879          */
 880         private static function fetchSelf($self, array &$item)
 881         {
 882                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 883                 if (DBA::exists('conversation', $condition)) {
 884                         Logger::log('Conversation '.$item['uri'].' is already stored.', Logger::DEBUG);
 885                         return;
 886                 }
 887
 888                 $curlResult = DI::httpRequest()->get($self);
 889
 890                 if (!$curlResult->isSuccess()) {
 891                         return;
 892                 }
 893
 894                 // We reformat the XML to make it better readable
 895                 $doc = new DOMDocument();
 896                 $doc->loadXML($curlResult->getBody());
 897                 $doc->preserveWhiteSpace = false;
 898                 $doc->formatOutput = true;
 899                 $xml = $doc->saveXML();
 900
 901                 $item["protocol"] = Conversation::PARCEL_SALMON;
 902                 $item["source"] = $xml;
 903
 904                 Logger::log('Conversation '.$item['uri'].' is now fetched.', Logger::DEBUG);
 905         }
 906
 907         /**
 908          * Fetch related posts and processes them
 909          *
 910          * @param string $related     The link to the related item
 911          * @param string $related_uri The related item in "uri" format
 912          * @param array  $importer    user record of the importing user
 913          * @return void
 914          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 915          * @throws \ImagickException
 916          */
 917         private static function fetchRelated($related, $related_uri, $importer)
 918         {
 919                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 920                 $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 921                 if (DBA::isResult($conversation)) {
 922                         $stored = true;
 923                         $xml = $conversation['source'];
 924                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 925                                 Logger::log('Got valid cached XML for URI '.$related_uri, Logger::DEBUG);
 926                                 return;
 927                         }
 928                         if ($conversation['protocol'] == Conversation::PARCEL_SALMON) {
 929                                 Logger::log('Delete invalid cached XML for URI '.$related_uri, Logger::DEBUG);
 930                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 931                         }
 932                 }
 933
 934                 $stored = false;
 935                 $curlResult = DI::httpRequest()->get($related, ['accept_content' => 'application/atom+xml, text/html']);
 936
 937                 if (!$curlResult->isSuccess()) {
 938                         return;
 939                 }
 940
 941                 $xml = '';
 942
 943                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 944                         Logger::log('Directly fetched XML for URI ' . $related_uri, Logger::DEBUG);
 945                         $xml = $curlResult->getBody();
 946                 }
 947
 948                 if ($xml == '') {
 949                         $doc = new DOMDocument();
 950                         if (!@$doc->loadHTML($curlResult->getBody())) {
 951                                 return;
 952                         }
 953                         $xpath = new DOMXPath($doc);
 954
 955                         $atom_file = '';
 956
 957                         $links = $xpath->query('//link');
 958                         if ($links) {
 959                                 foreach ($links as $link) {
 960                                         $attribute = self::readAttributes($link);
 961                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 962                                                 $atom_file = $attribute['href'];
 963                                         }
 964                                 }
 965                                 if ($atom_file != '') {
 966                                         $curlResult = DI::httpRequest()->get($atom_file);
 967
 968                                         if ($curlResult->isSuccess()) {
 969                                                 Logger::log('Fetched XML for URI ' . $related_uri, Logger::DEBUG);
 970                                                 $xml = $curlResult->getBody();
 971                                         }
 972                                 }
 973                         }
 974                 }
 975
 976                 // Workaround for older GNU Social servers
 977                 if (($xml == '') && strstr($related, '/notice/')) {
 978                         $curlResult = DI::httpRequest()->get(str_replace('/notice/', '/api/statuses/show/', $related) . '.atom');
 979
 980                         if ($curlResult->isSuccess()) {
 981                                 Logger::log('GNU Social workaround to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 982                                 $xml = $curlResult->getBody();
 983                         }
 984                 }
 985
 986                 // Even more worse workaround for GNU Social ;-)
 987                 if ($xml == '') {
 988                         $related_guess = self::convertHref($related_uri);
 989                         $curlResult = DI::httpRequest()->get(str_replace('/notice/', '/api/statuses/show/', $related_guess) . '.atom');
 990
 991                         if ($curlResult->isSuccess()) {
 992                                 Logger::log('GNU Social workaround 2 to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 993                                 $xml = $curlResult->getBody();
 994                         }
 995                 }
 996
 997                 // Finally we take the data that we fetched from "ostatus:conversation"
 998                 if ($xml == '') {
 999                         $condition = ['item-uri' => $related_uri, 'protocol' => Conversation::PARCEL_SPLIT_CONVERSATION];
1000                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
1001                         if (DBA::isResult($conversation)) {
1002                                 $stored = true;
1003                                 Logger::log('Got cached XML from conversation for URI '.$related_uri, Logger::DEBUG);
1004                                 $xml = $conversation['source'];
1005                         }
1006                 }
1007
1008                 if ($xml != '') {
1009                         self::process($xml, $importer, $contact, $hub, $stored, false);
1010                 } else {
1011                         Logger::log("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, Logger::DEBUG);
1012                 }
1013                 return;
1014         }
1015
1016         /**
1017          * Processes the XML for a repeated post
1018          *
1019          * @param DOMXPath $xpath    The xpath object
1020          * @param object   $entry    The xml entry that is processed
1021          * @param array    $item     The item array
1022          * @param array    $importer user record of the importing user
1023          *
1024          * @return array with data from links
1025          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1026          * @throws \ImagickException
1027          */
1028         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer)
1029         {
1030                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
1031
1032                 if (!is_object($activityobject)) {
1033                         return [];
1034                 }
1035
1036                 $link_data = [];
1037
1038                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
1039
1040                 $links = $xpath->query("atom:link", $activityobject);
1041                 if ($links) {
1042                         $link_data = self::processLinks($links, $item);
1043                 }
1044
1045                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
1046                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
1047                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
1048
1049                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
1050
1051                 $item["author-name"] = $orig_author["author-name"];
1052                 $item["author-link"] = $orig_author["author-link"];
1053                 $item["author-id"] = $orig_author["author-id"];
1054
1055                 $item["body"] = HTML::toBBCode($orig_body);
1056                 $item["created"] = $orig_created;
1057                 $item["edited"] = $orig_edited;
1058
1059                 $item["uri"] = $orig_uri;
1060
1061                 $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
1062
1063                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
1064
1065                 // Mastodon Content Warning
1066                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
1067                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
1068                         if (!empty($clear_text)) {
1069                                 $item['content-warning'] = HTML::toBBCode($clear_text);
1070                         }
1071                 }
1072
1073                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
1074                 if (is_object($inreplyto->item(0))) {
1075                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1076                                 if ($attributes->name == "ref") {
1077                                         $item["parent-uri"] = $attributes->textContent;
1078                                 }
1079                         }
1080                 }
1081
1082                 return $link_data;
1083         }
1084
1085         /**
1086          * Processes links in the XML
1087          *
1088          * @param object $links The xml data that contain links
1089          * @param array  $item  The item array
1090          *
1091          * @return array with data from the links
1092          */
1093         private static function processLinks($links, array &$item)
1094         {
1095                 $link_data = ['add_body' => '', 'self' => ''];
1096
1097                 foreach ($links as $link) {
1098                         $attribute = self::readAttributes($link);
1099
1100                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1101                                 switch ($attribute['rel']) {
1102                                         case "alternate":
1103                                                 $item["plink"] = $attribute['href'];
1104                                                 if (($item["object-type"] == Activity\ObjectType::QUESTION)
1105                                                         || ($item["object-type"] == Activity\ObjectType::EVENT)
1106                                                 ) {
1107                                                         $item["body"] .= "\n" . PageInfo::getFooterFromUrl($attribute['href']);
1108                                                 }
1109                                                 break;
1110                                         case "ostatus:conversation":
1111                                                 $link_data['conversation'] = $attribute['href'];
1112                                                 $item['conversation-href'] = $link_data['conversation'];
1113                                                 if (!isset($item['conversation-uri'])) {
1114                                                         $item['conversation-uri'] = $item['conversation-href'];
1115                                                 }
1116                                                 break;
1117                                         case "enclosure":
1118                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1119                                                 if ($filetype == 'image') {
1120                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1121                                                 } else {
1122                                                         if (!empty($item["attach"])) {
1123                                                                 $item["attach"] .= ',';
1124                                                         } else {
1125                                                                 $item["attach"] = '';
1126                                                         }
1127                                                         if (!isset($attribute['length'])) {
1128                                                                 $attribute['length'] = "0";
1129                                                         }
1130                                                         $item["attach"] .= Post\Media::getAttachElement($attribute['href'],
1131                                                                 $attribute['length'], $attribute['type'], $attribute['title'] ?? '');
1132                                                 }
1133                                                 break;
1134                                         case "related":
1135                                                 if ($item["object-type"] != Activity\ObjectType::BOOKMARK) {
1136                                                         if (!isset($item["parent-uri"])) {
1137                                                                 $item["parent-uri"] = $attribute['href'];
1138                                                         }
1139                                                         $link_data['related'] = $attribute['href'];
1140                                                 } else {
1141                                                         $item["body"] .= "\n" . PageInfo::getFooterFromUrl($attribute['href']);
1142                                                 }
1143                                                 break;
1144                                         case "self":
1145                                                 if (empty($item["plink"])) {
1146                                                         $item["plink"] = $attribute['href'];
1147                                                 }
1148                                                 $link_data['self'] = $attribute['href'];
1149                                                 break;
1150                                 }
1151                         }
1152                 }
1153                 return $link_data;
1154         }
1155
1156         /**
1157          * Create an url out of an uri
1158          *
1159          * @param string $href URI in the format "parameter1:parameter1:..."
1160          *
1161          * @return string URL in the format http(s)://....
1162          */
1163         private static function convertHref($href)
1164         {
1165                 $elements = explode(":", $href);
1166
1167                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1168                         return $href;
1169                 }
1170
1171                 $server = explode(",", $elements[1]);
1172                 $conversation = explode("=", $elements[2]);
1173
1174                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1175                         return "http://".$server[0]."/notice/".$elements[3];
1176                 }
1177
1178                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1179                         return $href;
1180                 }
1181                 if ($elements[3] == "objectType=thread") {
1182                         return "http://".$server[0]."/conversation/".$conversation[1];
1183                 } else {
1184                         return "http://".$server[0]."/notice/".$conversation[1];
1185                 }
1186         }
1187
1188         /**
1189          * Checks if the current post is a reshare
1190          *
1191          * @param array $item The item array of thw post
1192          *
1193          * @return string The guid if the post is a reshare
1194          */
1195         public static function getResharedGuid(array $item)
1196         {
1197                 $reshared = Item::getShareArray($item);
1198                 if (empty($reshared['guid']) || !empty($reshared['comment'])) {
1199                         return '';
1200                 }
1201
1202                 return $reshared['guid'];
1203         }
1204
1205         /**
1206          * Cleans the body of a post if it contains picture links
1207          *
1208          * @param string $body The body
1209          *
1210          * @return string The cleaned body
1211          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1212          */
1213         public static function formatPicturePost($body)
1214         {
1215                 $siteinfo = BBCode::getAttachedData($body);
1216
1217                 if (($siteinfo["type"] == "photo") && (!empty($siteinfo["preview"]) || !empty($siteinfo["image"]))) {
1218                         if (isset($siteinfo["preview"])) {
1219                                 $preview = $siteinfo["preview"];
1220                         } else {
1221                                 $preview = $siteinfo["image"];
1222                         }
1223
1224                         // Is it a remote picture? Then make a smaller preview here
1225                         $preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
1226
1227                         // Is it a local picture? Then make it smaller here
1228                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1229                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1230
1231                         if (isset($siteinfo["url"])) {
1232                                 $url = $siteinfo["url"];
1233                         } else {
1234                                 $url = $siteinfo["image"];
1235                         }
1236
1237                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1238                 }
1239
1240                 return $body;
1241         }
1242
1243         /**
1244          * Adds the header elements to the XML document
1245          *
1246          * @param DOMDocument $doc       XML document
1247          * @param array       $owner     Contact data of the poster
1248          * @param string      $filter    The related feed filter (activity, posts or comments)
1249          *
1250          * @return object header root element
1251          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1252          */
1253         private static function addHeader(DOMDocument $doc, array $owner, $filter)
1254         {
1255                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
1256                 $doc->appendChild($root);
1257
1258                 $root->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1259                 $root->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1260                 $root->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1261                 $root->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1262                 $root->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1263                 $root->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1264                 $root->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1265                 $root->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1266
1267                 $title = '';
1268                 $selfUri = '/feed/' . $owner["nick"] . '/';
1269                 switch ($filter) {
1270                         case 'activity':
1271                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1272                                 $selfUri .= $filter;
1273                                 break;
1274                         case 'posts':
1275                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1276                                 break;
1277                         case 'comments':
1278                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1279                                 $selfUri .= $filter;
1280                                 break;
1281                 }
1282
1283                 $selfUri = "/dfrn_poll/" . $owner["nick"];
1284
1285                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1286                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1287                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
1288                 XML::addElement($doc, $root, "title", $title);
1289                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
1290                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1291                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1292
1293                 $author = self::addAuthor($doc, $owner, true);
1294                 $root->appendChild($author);
1295
1296                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1297                 XML::addElement($doc, $root, "link", "", $attributes);
1298
1299                 /// @TODO We have to find out what this is
1300                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1301                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1302                 ///             "type" => "application/json");
1303                 /// XML::addElement($doc, $root, "link", "", $attributes);
1304
1305                 self::hublinks($doc, $root, $owner["nick"]);
1306
1307                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1308                 XML::addElement($doc, $root, "link", "", $attributes);
1309
1310                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1311                 XML::addElement($doc, $root, "link", "", $attributes);
1312
1313                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1314                 XML::addElement($doc, $root, "link", "", $attributes);
1315
1316                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
1317                 XML::addElement($doc, $root, "link", "", $attributes);
1318
1319                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1320                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1321                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1322                         $members = DBA::count('contact', $condition);
1323                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1324                 }
1325
1326                 return $root;
1327         }
1328
1329         /**
1330          * Add the link to the push hubs to the XML document
1331          *
1332          * @param DOMDocument $doc  XML document
1333          * @param object      $root XML root element where the hub links are added
1334          * @param object      $nick nick
1335          * @return void
1336          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1337          */
1338         public static function hublinks(DOMDocument $doc, $root, $nick)
1339         {
1340                 $h = DI::baseUrl() . '/pubsubhubbub/'.$nick;
1341                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1342         }
1343
1344         /**
1345          * Adds attachment data to the XML document
1346          *
1347          * @param DOMDocument $doc  XML document
1348          * @param object      $root XML root element where the hub links are added
1349          * @param array       $item Data of the item that is to be posted
1350          * @return void
1351          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1352          */
1353         public static function getAttachment(DOMDocument $doc, $root, $item)
1354         {
1355                 $siteinfo = BBCode::getAttachedData($item["body"]);
1356
1357                 switch ($siteinfo["type"]) {
1358                         case 'photo':
1359                                 if (!empty($siteinfo["image"])) {
1360                                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1361                                         if ($imgdata) {
1362                                                 $attributes = ["rel" => "enclosure",
1363                                                                 "href" => $siteinfo["image"],
1364                                                                 "type" => $imgdata["mime"],
1365                                                                 "length" => intval($imgdata["size"])];
1366                                                 XML::addElement($doc, $root, "link", "", $attributes);
1367                                         }
1368                                 }
1369                                 break;
1370                         case 'video':
1371                                 $attributes = ["rel" => "enclosure",
1372                                                 "href" => $siteinfo["url"],
1373                                                 "type" => "text/html; charset=UTF-8",
1374                                                 "length" => "0",
1375                                                 "title" => ($siteinfo["title"] ?? '') ?: $siteinfo["url"],
1376                                 ];
1377                                 XML::addElement($doc, $root, "link", "", $attributes);
1378                                 break;
1379                         default:
1380                                 break;
1381                 }
1382
1383                 if (!DI::config()->get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1384                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1385                         if ($imgdata) {
1386                                 $attributes = ["rel" => "enclosure",
1387                                                 "href" => $siteinfo["image"],
1388                                                 "type" => $imgdata["mime"],
1389                                                 "length" => intval($imgdata["size"])];
1390
1391                                 XML::addElement($doc, $root, "link", "", $attributes);
1392                         }
1393                 }
1394
1395                 $arr = explode('[/attach],', $item['attach']);
1396                 if (count($arr)) {
1397                         foreach ($arr as $r) {
1398                                 $matches = false;
1399                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1400                                 if ($cnt) {
1401                                         $attributes = ["rel" => "enclosure",
1402                                                         "href" => $matches[1],
1403                                                         "type" => $matches[3]];
1404
1405                                         if (intval($matches[2])) {
1406                                                 $attributes["length"] = intval($matches[2]);
1407                                         }
1408                                         if (trim($matches[4]) != "") {
1409                                                 $attributes["title"] = trim($matches[4]);
1410                                         }
1411                                         XML::addElement($doc, $root, "link", "", $attributes);
1412                                 }
1413                         }
1414                 }
1415         }
1416
1417         /**
1418          * Adds the author element to the XML document
1419          *
1420          * @param DOMDocument $doc          XML document
1421          * @param array       $owner        Contact data of the poster
1422          * @param bool        $show_profile Whether to show profile
1423          *
1424          * @return \DOMElement author element
1425          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1426          */
1427         private static function addAuthor(DOMDocument $doc, array $owner, $show_profile = true)
1428         {
1429                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1430                 $author = $doc->createElement("author");
1431                 XML::addElement($doc, $author, "id", $owner["url"]);
1432                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1433                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::GROUP);
1434                 } else {
1435                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::PERSON);
1436                 }
1437
1438                 XML::addElement($doc, $author, "uri", $owner["url"]);
1439                 XML::addElement($doc, $author, "name", $owner["nick"]);
1440                 XML::addElement($doc, $author, "email", $owner["addr"]);
1441                 if ($show_profile) {
1442                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, BBCode::OSTATUS));
1443                 }
1444
1445                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1446                 XML::addElement($doc, $author, "link", "", $attributes);
1447
1448                 $attributes = [
1449                                 "rel" => "avatar",
1450                                 "type" => "image/jpeg", // To-Do?
1451                                 "media:width" => 300,
1452                                 "media:height" => 300,
1453                                 "href" => $owner["photo"]];
1454                 XML::addElement($doc, $author, "link", "", $attributes);
1455
1456                 if (isset($owner["thumb"])) {
1457                         $attributes = [
1458                                         "rel" => "avatar",
1459                                         "type" => "image/jpeg", // To-Do?
1460                                         "media:width" => 80,
1461                                         "media:height" => 80,
1462                                         "href" => $owner["thumb"]];
1463                         XML::addElement($doc, $author, "link", "", $attributes);
1464                 }
1465
1466                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1467                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1468                 if ($show_profile) {
1469                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, BBCode::OSTATUS));
1470
1471                         if (trim($owner["location"]) != "") {
1472                                 $element = $doc->createElement("poco:address");
1473                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1474                                 $author->appendChild($element);
1475                         }
1476                 }
1477
1478                 if (DBA::isResult($profile) && !$show_profile) {
1479                         if (trim($profile["homepage"]) != "") {
1480                                 $urls = $doc->createElement("poco:urls");
1481                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1482                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1483                                 XML::addElement($doc, $urls, "poco:primary", "true");
1484                                 $author->appendChild($urls);
1485                         }
1486
1487                         XML::addElement($doc, $author, "followers", "", ["url" => DI::baseUrl() . "/profile/" . $owner["nick"] . "/contacts/followers"]);
1488                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1489
1490                         if ($profile["publish"]) {
1491                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1492                         }
1493                 }
1494
1495                 return $author;
1496         }
1497
1498         /**
1499          * @TODO Picture attachments should look like this:
1500          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1501          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1502          */
1503
1504         /**
1505          * Returns the given activity if present - otherwise returns the "post" activity
1506          *
1507          * @param array $item Data of the item that is to be posted
1508          *
1509          * @return string activity
1510          */
1511         public static function constructVerb(array $item)
1512         {
1513                 if (!empty($item['verb'])) {
1514                         return $item['verb'];
1515                 }
1516
1517                 return Activity::POST;
1518         }
1519
1520         /**
1521          * Returns the given object type if present - otherwise returns the "note" object type
1522          *
1523          * @param array $item Data of the item that is to be posted
1524          *
1525          * @return string Object type
1526          */
1527         private static function constructObjecttype(array $item)
1528         {
1529                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1530                         return $item['object-type'];
1531                 }
1532
1533                 return Activity\ObjectType::NOTE;
1534         }
1535
1536         /**
1537          * Adds an entry element to the XML document
1538          *
1539          * @param DOMDocument $doc       XML document
1540          * @param array       $item      Data of the item that is to be posted
1541          * @param array       $owner     Contact data of the poster
1542          * @param bool        $toplevel  optional default false
1543          *
1544          * @return \DOMElement Entry element
1545          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1546          * @throws \ImagickException
1547          */
1548         private static function entry(DOMDocument $doc, array $item, array $owner, $toplevel = false)
1549         {
1550                 $xml = null;
1551
1552                 $repeated_guid = self::getResharedGuid($item);
1553                 if ($repeated_guid != "") {
1554                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1555                 }
1556
1557                 if ($xml) {
1558                         return $xml;
1559                 }
1560
1561                 if ($item["verb"] == Activity::LIKE) {
1562                         return self::likeEntry($doc, $item, $owner, $toplevel);
1563                 } elseif (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1564                         return self::followEntry($doc, $item, $owner, $toplevel);
1565                 } else {
1566                         return self::noteEntry($doc, $item, $owner, $toplevel);
1567                 }
1568         }
1569
1570         /**
1571          * Adds a source entry to the XML document
1572          *
1573          * @param DOMDocument $doc     XML document
1574          * @param array       $contact Array of the contact that is added
1575          *
1576          * @return \DOMElement Source element
1577          * @throws \Exception
1578          */
1579         private static function sourceEntry(DOMDocument $doc, array $contact)
1580         {
1581                 $source = $doc->createElement("source");
1582                 XML::addElement($doc, $source, "id", $contact["poll"]);
1583                 XML::addElement($doc, $source, "title", $contact["name"]);
1584                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1585                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1586                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1587                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1588
1589                 return $source;
1590         }
1591
1592         /**
1593          * Adds an entry element with reshared content
1594          *
1595          * @param DOMDocument $doc           XML document
1596          * @param array       $item          Data of the item that is to be posted
1597          * @param array       $owner         Contact data of the poster
1598          * @param string      $repeated_guid guid
1599          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
1600          *
1601          * @return bool Entry element
1602          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1603          * @throws \ImagickException
1604          */
1605         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid, $toplevel)
1606         {
1607                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1608                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1609                 }
1610
1611                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1612
1613                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
1614                         'network' => [Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS]];
1615                 $repeated_item = Item::selectFirst([], $condition);
1616                 if (!DBA::isResult($repeated_item)) {
1617                         return false;
1618                 }
1619
1620                 $contact = Contact::getByURL($repeated_item['author-link']) ?: $owner;
1621
1622                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1623
1624                 self::entryContent($doc, $entry, $item, $owner, $title, Activity::SHARE, false);
1625
1626                 $as_object = $doc->createElement("activity:object");
1627
1628                 XML::addElement($doc, $as_object, "activity:object-type", ActivityNamespace::ACTIVITY_SCHEMA . "activity");
1629
1630                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1631
1632                 $author = self::addAuthor($doc, $contact, false);
1633                 $as_object->appendChild($author);
1634
1635                 $as_object2 = $doc->createElement("activity:object");
1636
1637                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1638
1639                 $title = sprintf("New comment by %s", $contact["nick"]);
1640
1641                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1642
1643                 $as_object->appendChild($as_object2);
1644
1645                 self::entryFooter($doc, $as_object, $item, $owner, false);
1646
1647                 $source = self::sourceEntry($doc, $contact);
1648
1649                 $as_object->appendChild($source);
1650
1651                 $entry->appendChild($as_object);
1652
1653                 self::entryFooter($doc, $entry, $item, $owner, true);
1654
1655                 return $entry;
1656         }
1657
1658         /**
1659          * Adds an entry element with a "like"
1660          *
1661          * @param DOMDocument $doc      XML document
1662          * @param array       $item     Data of the item that is to be posted
1663          * @param array       $owner    Contact data of the poster
1664          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1665          *
1666          * @return \DOMElement Entry element with "like"
1667          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1668          * @throws \ImagickException
1669          */
1670         private static function likeEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1671         {
1672                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1673                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1674                 }
1675
1676                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1677
1678                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . "favorite";
1679                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1680
1681                 $parent = Item::selectFirst([], ['uri' => $item["thr-parent"], 'uid' => $item["uid"]]);
1682                 if (DBA::isResult($parent)) {
1683                         $as_object = $doc->createElement("activity:object");
1684
1685                         XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent));
1686
1687                         self::entryContent($doc, $as_object, $parent, $owner, "New entry");
1688
1689                         $entry->appendChild($as_object);
1690                 }
1691
1692                 self::entryFooter($doc, $entry, $item, $owner);
1693
1694                 return $entry;
1695         }
1696
1697         /**
1698          * Adds the person object element to the XML document
1699          *
1700          * @param DOMDocument $doc     XML document
1701          * @param array       $owner   Contact data of the poster
1702          * @param array       $contact Contact data of the target
1703          *
1704          * @return object author element
1705          */
1706         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact)
1707         {
1708                 $object = $doc->createElement("activity:object");
1709                 XML::addElement($doc, $object, "activity:object-type", Activity\ObjectType::PERSON);
1710
1711                 if ($contact['network'] == Protocol::PHANTOM) {
1712                         XML::addElement($doc, $object, "id", $contact['url']);
1713                         return $object;
1714                 }
1715
1716                 XML::addElement($doc, $object, "id", $contact["alias"]);
1717                 XML::addElement($doc, $object, "title", $contact["nick"]);
1718
1719                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1720                 XML::addElement($doc, $object, "link", "", $attributes);
1721
1722                 $attributes = [
1723                                 "rel" => "avatar",
1724                                 "type" => "image/jpeg", // To-Do?
1725                                 "media:width" => 300,
1726                                 "media:height" => 300,
1727                                 "href" => $contact["photo"]];
1728                 XML::addElement($doc, $object, "link", "", $attributes);
1729
1730                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1731                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1732
1733                 if (trim($contact["location"]) != "") {
1734                         $element = $doc->createElement("poco:address");
1735                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1736                         $object->appendChild($element);
1737                 }
1738
1739                 return $object;
1740         }
1741
1742         /**
1743          * Adds a follow/unfollow entry element
1744          *
1745          * @param DOMDocument $doc      XML document
1746          * @param array       $item     Data of the follow/unfollow message
1747          * @param array       $owner    Contact data of the poster
1748          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1749          *
1750          * @return \DOMElement Entry element
1751          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1752          * @throws \ImagickException
1753          */
1754         private static function followEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1755         {
1756                 $item["id"] = $item['parent'] = 0;
1757                 $item["created"] = $item["edited"] = date("c");
1758                 $item["private"] = Item::PRIVATE;
1759
1760                 $contact = Contact::getByURL($item['follow']);
1761                 $item['follow'] = $contact['url'];
1762
1763                 if ($contact['alias']) {
1764                         $item['follow'] = $contact['alias'];
1765                 } else {
1766                         $contact['alias'] = $contact['url'];
1767                 }
1768
1769                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact["url"])];
1770                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1771
1772                 if (DBA::isResult($user_contact)) {
1773                         $connect_id = $user_contact['id'];
1774                 } else {
1775                         $connect_id = 0;
1776                 }
1777
1778                 if ($item['verb'] == Activity::FOLLOW) {
1779                         $message = DI::l10n()->t('%s is now following %s.');
1780                         $title = DI::l10n()->t('following');
1781                         $action = "subscription";
1782                 } else {
1783                         $message = DI::l10n()->t('%s stopped following %s.');
1784                         $title = DI::l10n()->t('stopped following');
1785                         $action = "unfollow";
1786                 }
1787
1788                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1789                                 = 'tag:' . DI::baseUrl()->getHostname().
1790                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1791                                 ':person:'.$connect_id.':'.$item['created'];
1792
1793                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1794
1795                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1796
1797                 self::entryContent($doc, $entry, $item, $owner, $title);
1798
1799                 $object = self::addPersonObject($doc, $owner, $contact);
1800                 $entry->appendChild($object);
1801
1802                 self::entryFooter($doc, $entry, $item, $owner);
1803
1804                 return $entry;
1805         }
1806
1807         /**
1808          * Adds a regular entry element
1809          *
1810          * @param DOMDocument $doc       XML document
1811          * @param array       $item      Data of the item that is to be posted
1812          * @param array       $owner     Contact data of the poster
1813          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1814          *
1815          * @return \DOMElement Entry element
1816          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1817          * @throws \ImagickException
1818          */
1819         private static function noteEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1820         {
1821                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1822                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1823                 }
1824
1825                 if (!$toplevel) {
1826                         if (!empty($item['title'])) {
1827                                 $title = BBCode::convert($item['title'], false, BBCode::OSTATUS);
1828                         } else {
1829                                 $title = sprintf("New note by %s", $owner["nick"]);
1830                         }
1831                 } else {
1832                         $title = sprintf("New comment by %s", $owner["nick"]);
1833                 }
1834
1835                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1836
1837                 XML::addElement($doc, $entry, "activity:object-type", Activity\ObjectType::NOTE);
1838
1839                 self::entryContent($doc, $entry, $item, $owner, $title, '', true);
1840
1841                 self::entryFooter($doc, $entry, $item, $owner, true);
1842
1843                 return $entry;
1844         }
1845
1846         /**
1847          * Adds a header element to the XML document
1848          *
1849          * @param DOMDocument $doc      XML document
1850          * @param array       $owner    Contact data of the poster
1851          * @param array       $item
1852          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1853          *
1854          * @return \DOMElement The entry element where the elements are added
1855          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1856          * @throws \ImagickException
1857          */
1858         public static function entryHeader(DOMDocument $doc, array $owner, array $item, $toplevel)
1859         {
1860                 if (!$toplevel) {
1861                         $entry = $doc->createElement("entry");
1862
1863                         if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1864                                 $contact = Contact::getByURL($item['author-link']) ?: $owner;
1865                                 $author = self::addAuthor($doc, $contact, false);
1866                                 $entry->appendChild($author);
1867                         }
1868                 } else {
1869                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, "entry");
1870
1871                         $entry->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1872                         $entry->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1873                         $entry->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1874                         $entry->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1875                         $entry->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1876                         $entry->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1877                         $entry->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1878                         $entry->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1879
1880                         $author = self::addAuthor($doc, $owner);
1881                         $entry->appendChild($author);
1882                 }
1883
1884                 return $entry;
1885         }
1886
1887         /**
1888          * Adds elements to the XML document
1889          *
1890          * @param DOMDocument $doc       XML document
1891          * @param \DOMElement $entry     Entry element where the content is added
1892          * @param array       $item      Data of the item that is to be posted
1893          * @param array       $owner     Contact data of the poster
1894          * @param string      $title     Title for the post
1895          * @param string      $verb      The activity verb
1896          * @param bool        $complete  Add the "status_net" element?
1897          * @return void
1898          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1899          */
1900         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, array $owner, $title, $verb = "", $complete = true)
1901         {
1902                 if ($verb == "") {
1903                         $verb = self::constructVerb($item);
1904                 }
1905
1906                 XML::addElement($doc, $entry, "id", $item["uri"]);
1907                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1908
1909                 $body = self::formatPicturePost($item['body']);
1910
1911                 if (!empty($item['title'])) {
1912                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1913                 }
1914
1915                 $body = BBCode::convert($body, false, BBCode::OSTATUS);
1916
1917                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1918
1919                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1920                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
1921                 );
1922
1923                 if ($complete && ($item["id"] > 0)) {
1924                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1925                 }
1926
1927                 XML::addElement($doc, $entry, "activity:verb", $verb);
1928
1929                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1930                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1931         }
1932
1933         /**
1934          * Adds the elements at the foot of an entry to the XML document
1935          *
1936          * @param DOMDocument $doc       XML document
1937          * @param object      $entry     The entry element where the elements are added
1938          * @param array       $item      Data of the item that is to be posted
1939          * @param array       $owner     Contact data of the poster
1940          * @param bool        $complete  default true
1941          * @return void
1942          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1943          */
1944         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, $complete = true)
1945         {
1946                 $mentioned = [];
1947
1948                 if ($item['gravity'] != GRAVITY_PARENT) {
1949                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1950                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1951
1952                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $parent_item]);
1953
1954                         if (DBA::isResult($thrparent)) {
1955                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
1956                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
1957                                 $parent_plink = $thrparent["plink"];
1958                         } else {
1959                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
1960                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
1961                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
1962                         }
1963
1964                         $attributes = [
1965                                         "ref" => $parent_item,
1966                                         "href" => $parent_plink];
1967                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1968
1969                         $attributes = [
1970                                         "rel" => "related",
1971                                         "href" => $parent_plink];
1972                         XML::addElement($doc, $entry, "link", "", $attributes);
1973                 }
1974
1975                 if (intval($item['parent']) > 0) {
1976                         $conversation_href = $conversation_uri = str_replace('/objects/', '/context/', $item['parent-uri']);
1977
1978                         if (isset($parent_item)) {
1979                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
1980                                 if (DBA::isResult($conversation)) {
1981                                         if ($conversation['conversation-uri'] != '') {
1982                                                 $conversation_uri = $conversation['conversation-uri'];
1983                                         }
1984                                         if ($conversation['conversation-href'] != '') {
1985                                                 $conversation_href = $conversation['conversation-href'];
1986                                         }
1987                                 }
1988                         }
1989
1990                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
1991
1992                         $attributes = [
1993                                         "href" => $conversation_href,
1994                                         "local_id" => $item['parent'],
1995                                         "ref" => $conversation_uri];
1996
1997                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1998                 }
1999
2000                 // uri-id isn't present for follow entry pseudo-items
2001                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
2002                 foreach ($tags as $tag) {
2003                         $mentioned[$tag['url']] = $tag['url'];
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                         $contact = Contact::getByURL($mention, false, ['contact-type']);
2016                         if (!empty($contact) && ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
2017                                 XML::addElement($doc, $entry, "link", "",
2018                                         [
2019                                                 "rel" => "mentioned",
2020                                                 "ostatus:object-type" => Activity\ObjectType::GROUP,
2021                                                 "href" => $mention]
2022                                 );
2023                         } else {
2024                                 XML::addElement($doc, $entry, "link", "",
2025                                         [
2026                                                 "rel" => "mentioned",
2027                                                 "ostatus:object-type" => Activity\ObjectType::PERSON,
2028                                                 "href" => $mention]
2029                                 );
2030                         }
2031                 }
2032
2033                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
2034                         XML::addElement($doc, $entry, "link", "", [
2035                                 "rel" => "mentioned",
2036                                 "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2037                                 "href" => $owner['url']
2038                         ]);
2039                 }
2040
2041                 if ($item['private'] != Item::PRIVATE) {
2042                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2043                                                                         "href" => "http://activityschema.org/collection/public"]);
2044                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2045                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2046                                                                         "href" => "http://activityschema.org/collection/public"]);
2047                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2048                 }
2049
2050                 foreach ($tags as $tag) {
2051                         if ($tag['type'] == Tag::HASHTAG) {
2052                                 XML::addElement($doc, $entry, "category", "", ["term" => $tag['name']]);
2053                         }
2054                 }
2055
2056                 self::getAttachment($doc, $entry, $item);
2057
2058                 if ($complete && ($item["id"] > 0)) {
2059                         $app = $item["app"];
2060                         if ($app == "") {
2061                                 $app = "web";
2062                         }
2063
2064                         $attributes = ["local_id" => $item["id"], "source" => $app];
2065
2066                         if (isset($parent["id"])) {
2067                                 $attributes["repeat_of"] = $parent["id"];
2068                         }
2069
2070                         if ($item["coord"] != "") {
2071                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2072                         }
2073
2074                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2075                 }
2076         }
2077
2078         /**
2079          * Creates the XML feed for a given nickname
2080          *
2081          * Supported filters:
2082          * - activity (default): all the public posts
2083          * - posts: all the public top-level posts
2084          * - comments: all the public replies
2085          *
2086          * Updates the provided last_update parameter if the result comes from the
2087          * cache or it is empty
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 $nocache     Wether to bypass caching
2094          *
2095          * @return string XML feed
2096          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2097          * @throws \ImagickException
2098          */
2099         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2100         {
2101                 $stamp = microtime(true);
2102
2103                 $owner = User::getOwnerDataByNick($owner_nick);
2104                 if (!$owner) {
2105                         return;
2106                 }
2107
2108                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2109
2110                 $previous_created = $last_update;
2111
2112                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2113                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2114                         $result = DI::cache()->get($cachekey);
2115                         if (!$nocache && !is_null($result)) {
2116                                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', Logger::DEBUG);
2117                                 $last_update = $result['last_update'];
2118                                 return $result['feed'];
2119                         }
2120                 }
2121
2122                 if (!strlen($last_update)) {
2123                         $last_update = 'now -30 days';
2124                 }
2125
2126                 $check_date = DateTimeFormat::utc($last_update);
2127                 $authorid = Contact::getIdForURL($owner["url"]);
2128
2129                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted`
2130                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2131                         $owner["uid"], $check_date, Item::PRIVATE, Protocol::OSTATUS, Protocol::DFRN];
2132
2133                 if ($filter === 'comments') {
2134                         $condition[0] .= " AND `object-type` = ? ";
2135                         $condition[] = Activity\ObjectType::COMMENT;
2136                 }
2137
2138                 if ($owner['contact-type'] != Contact::TYPE_COMMUNITY) {
2139                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2140                         $condition[] = $owner["id"];
2141                         $condition[] = $authorid;
2142                 }
2143
2144                 $params = ['order' => ['received' => true], 'limit' => $max_items];
2145
2146                 if ($filter === 'posts') {
2147                         $ret = Item::selectThread([], $condition, $params);
2148                 } else {
2149                         $ret = Item::select([], $condition, $params);
2150                 }
2151
2152                 $items = Item::inArray($ret);
2153
2154                 $doc = new DOMDocument('1.0', 'utf-8');
2155                 $doc->formatOutput = true;
2156
2157                 $root = self::addHeader($doc, $owner, $filter);
2158
2159                 foreach ($items as $item) {
2160                         if (DI::config()->get('system', 'ostatus_debug')) {
2161                                 $item['body'] .= '🍼';
2162                         }
2163
2164                         if (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW, Activity::LIKE])) {
2165                                 continue;
2166                         }
2167
2168                         $entry = self::entry($doc, $item, $owner, false);
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' => $last_update];
2179                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
2180
2181                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, Logger::DEBUG);
2182
2183                 return $feeddata;
2184         }
2185
2186         /**
2187          * 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          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2194          * @throws \ImagickException
2195          */
2196         public static function salmon(array $item, array $owner)
2197         {
2198                 $doc = new DOMDocument('1.0', 'utf-8');
2199                 $doc->formatOutput = true;
2200
2201                 if (DI::config()->get('system', 'ostatus_debug')) {
2202                         $item['body'] .= '🐟';
2203                 }
2204
2205                 $entry = self::entry($doc, $item, $owner, true);
2206
2207                 $doc->appendChild($entry);
2208
2209                 return trim($doc->saveXML());
2210         }
2211
2212         /**
2213          * Checks if the given contact url does support OStatus
2214          *
2215          * @param string  $url    profile url
2216          * @return boolean
2217          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2218          * @throws \ImagickException
2219          */
2220         public static function isSupportedByContactUrl($url)
2221         {
2222                 $probe = Probe::uri($url, Protocol::OSTATUS);
2223                 return $probe['network'] == Protocol::OSTATUS;
2224         }
2225 }