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["thr-parent"] = $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]['thr-parent']) {
 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                                         $valid = true;
 526                                 }
 527
 528                                 if ($valid) {
 529                                         $default_contact = 0;
 530                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 531                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 532                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 533                                                 } else {
 534                                                         $default_contact = $item['contact-id'];
 535                                                 }
 536                                         }
 537                                         foreach (self::$itemlist as $item) {
 538                                                 $found = Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 539                                                 if ($found) {
 540                                                         Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", Logger::DEBUG);
 541                                                 } elseif ($item['contact-id'] < 0) {
 542                                                         Logger::log("Item with uri ".$item["uri"]." is from a blocked contact.", Logger::DEBUG);
 543                                                 } else {
 544                                                         $ret = Item::insert($item);
 545                                                         Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 546                                                 }
 547                                         }
 548                                 }
 549                                 self::$itemlist = [];
 550                         }
 551                         Logger::log('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 552                 }
 553                 return true;
 554         }
 555
 556         /**
 557          * Removes notice item from database
 558          *
 559          * @param array $item item
 560          * @return void
 561          * @throws \Exception
 562          */
 563         private static function deleteNotice(array $item)
 564         {
 565                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'uri' => $item['uri']];
 566                 if (!Item::exists($condition)) {
 567                         Logger::log('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it.");
 568                         return;
 569                 }
 570
 571                 Item::markForDeletion($condition);
 572
 573                 Logger::log('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 574         }
 575
 576         /**
 577          * Processes the XML for a post
 578          *
 579          * @param DOMXPath $xpath    The xpath object
 580          * @param object   $entry    The xml entry that is processed
 581          * @param array    $item     The item array
 582          * @param array    $importer user record of the importing user
 583          * @return void
 584          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 585          * @throws \ImagickException
 586          */
 587         private static function processPost(DOMXPath $xpath, $entry, array &$item, array $importer)
 588         {
 589                 $item["body"] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 590                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 591                 if (($item["object-type"] == Activity\ObjectType::BOOKMARK) || ($item["object-type"] == Activity\ObjectType::EVENT)) {
 592                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 593                         $item["body"] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 594                 } elseif ($item["object-type"] == Activity\ObjectType::QUESTION) {
 595                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 596                 }
 597
 598                 $item["created"] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 599                 $item["edited"] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 600                 $item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 601
 602                 $conv = $xpath->query('ostatus:conversation', $entry);
 603                 if (is_object($conv->item(0))) {
 604                         foreach ($conv->item(0)->attributes as $attributes) {
 605                                 if ($attributes->name == "ref") {
 606                                         $item['conversation-uri'] = $attributes->textContent;
 607                                 }
 608                                 if ($attributes->name == "href") {
 609                                         $item['conversation-href'] = $attributes->textContent;
 610                                 }
 611                         }
 612                 }
 613
 614                 $related = "";
 615
 616                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 617                 if (is_object($inreplyto->item(0))) {
 618                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 619                                 if ($attributes->name == "ref") {
 620                                         $item["thr-parent"] = $attributes->textContent;
 621                                 }
 622                                 if ($attributes->name == "href") {
 623                                         $related = $attributes->textContent;
 624                                 }
 625                         }
 626                 }
 627
 628                 $georsspoint = $xpath->query('georss:point', $entry);
 629                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 630                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 631                 }
 632
 633                 $categories = $xpath->query('atom:category', $entry);
 634                 if ($categories) {
 635                         foreach ($categories as $category) {
 636                                 foreach ($category->attributes as $attributes) {
 637                                         if ($attributes->name == 'term') {
 638                                                 // Store the hashtag
 639                                                 Tag::store($item['uri-id'], Tag::HASHTAG, $attributes->textContent);
 640                                         }
 641                                 }
 642                         }
 643                 }
 644
 645                 $self = '';
 646                 $add_body = '';
 647
 648                 $links = $xpath->query('atom:link', $entry);
 649                 if ($links) {
 650                         $link_data = self::processLinks($links, $item);
 651                         $self = $link_data['self'];
 652                         $add_body = $link_data['add_body'];
 653                 }
 654
 655                 $repeat_of = "";
 656
 657                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 658                 if ($notice_info && ($notice_info->length > 0)) {
 659                         foreach ($notice_info->item(0)->attributes as $attributes) {
 660                                 if ($attributes->name == "source") {
 661                                         $item["app"] = strip_tags($attributes->textContent);
 662                                 }
 663                                 if ($attributes->name == "repeat_of") {
 664                                         $repeat_of = $attributes->textContent;
 665                                 }
 666                         }
 667                 }
 668                 // Is it a repeated post?
 669                 if (($repeat_of != "") || ($item["verb"] == Activity::SHARE)) {
 670                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 671                         if (!empty($link_data['add_body'])) {
 672                                 $add_body .= $link_data['add_body'];
 673                         }
 674                 }
 675
 676                 $item["body"] .= $add_body;
 677
 678                 // Only add additional data when there is no picture in the post
 679                 if (!strstr($item["body"], '[/img]')) {
 680                         $item["body"] = PageInfo::searchAndAppendToBody($item["body"]);
 681                 }
 682
 683                 Tag::storeFromBody($item['uri-id'], $item['body']);
 684
 685                 // Mastodon Content Warning
 686                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 687                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 688                         if (!empty($clear_text)) {
 689                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 690                         }
 691                 }
 692
 693                 if (($self != '') && empty($item['protocol'])) {
 694                         self::fetchSelf($self, $item);
 695                 }
 696
 697                 if (!empty($item["conversation-href"])) {
 698                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 699                 }
 700
 701                 if (isset($item["thr-parent"])) {
 702                         if (!Item::exists(['uid' => $importer["uid"], 'uri' => $item['thr-parent']])) {
 703                                 if ($related != '') {
 704                                         self::fetchRelated($related, $item["thr-parent"], $importer);
 705                                 }
 706                         } else {
 707                                 Logger::log('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 708                         }
 709                 } else {
 710                         $item["thr-parent"] = $item["uri"];
 711                         $item["gravity"] = GRAVITY_PARENT;
 712                 }
 713
 714                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 715                         $item = Conversation::insert($item);
 716                 }
 717
 718                 self::$itemlist[] = $item;
 719         }
 720
 721         /**
 722          * Fetch the conversation for posts
 723          *
 724          * @param string $conversation     The link to the conversation
 725          * @param string $conversation_uri The conversation in "uri" format
 726          * @return void
 727          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 728          */
 729         private static function fetchConversation($conversation, $conversation_uri)
 730         {
 731                 // Ensure that we only store a conversation once in a process
 732                 if (isset(self::$conv_list[$conversation])) {
 733                         return;
 734                 }
 735
 736                 self::$conv_list[$conversation] = true;
 737
 738                 $curlResult = DI::httpRequest()->get($conversation, ['accept_content' => 'application/atom+xml, text/html']);
 739
 740                 if (!$curlResult->isSuccess()) {
 741                         return;
 742                 }
 743
 744                 $xml = '';
 745
 746                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 747                         $xml = $curlResult->getBody();
 748                 }
 749
 750                 if ($xml == '') {
 751                         $doc = new DOMDocument();
 752                         if (!@$doc->loadHTML($curlResult->getBody())) {
 753                                 return;
 754                         }
 755                         $xpath = new DOMXPath($doc);
 756
 757                         $links = $xpath->query('//link');
 758                         if ($links) {
 759                                 $file = '';
 760                                 foreach ($links as $link) {
 761                                         $attribute = self::readAttributes($link);
 762                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 763                                                 $file = $attribute['href'];
 764                                         }
 765                                 }
 766                                 if ($file != '') {
 767                                         $conversation_atom = DI::httpRequest()->get($attribute['href']);
 768
 769                                         if ($conversation_atom->isSuccess()) {
 770                                                 $xml = $conversation_atom->getBody();
 771                                         }
 772                                 }
 773                         }
 774                 }
 775
 776                 if ($xml == '') {
 777                         return;
 778                 }
 779
 780                 self::storeConversation($xml, $conversation, $conversation_uri);
 781         }
 782
 783         /**
 784          * Store a feed in several conversation entries
 785          *
 786          * @param string $xml              The feed
 787          * @param string $conversation     conversation
 788          * @param string $conversation_uri conversation uri
 789          * @return void
 790          * @throws \Exception
 791          */
 792         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 793         {
 794                 $doc = new DOMDocument();
 795                 @$doc->loadXML($xml);
 796
 797                 $xpath = new DOMXPath($doc);
 798                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 799                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 800                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 801
 802                 $entries = $xpath->query('/atom:feed/atom:entry');
 803
 804                 // Now store the entries
 805                 foreach ($entries as $entry) {
 806                         $doc2 = new DOMDocument();
 807                         $doc2->preserveWhiteSpace = false;
 808                         $doc2->formatOutput = true;
 809
 810                         $conv_data = [];
 811
 812                         $conv_data['protocol'] = Conversation::PARCEL_SPLIT_CONVERSATION;
 813                         $conv_data['network'] = Protocol::OSTATUS;
 814                         $conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 815
 816                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 817                         if (is_object($inreplyto->item(0))) {
 818                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 819                                         if ($attributes->name == "ref") {
 820                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 821                                         }
 822                                 }
 823                         }
 824
 825                         $conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 826
 827                         $conv = $xpath->query('ostatus:conversation', $entry);
 828                         if (is_object($conv->item(0))) {
 829                                 foreach ($conv->item(0)->attributes as $attributes) {
 830                                         if ($attributes->name == "ref") {
 831                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 832                                         }
 833                                         if ($attributes->name == "href") {
 834                                                 $conv_data['conversation-href'] = $attributes->textContent;
 835                                         }
 836                                 }
 837                         }
 838
 839                         if ($conversation != '') {
 840                                 $conv_data['conversation-uri'] = $conversation;
 841                         }
 842
 843                         if ($conversation_uri != '') {
 844                                 $conv_data['conversation-uri'] = $conversation_uri;
 845                         }
 846
 847                         $entry = $doc2->importNode($entry, true);
 848
 849                         $doc2->appendChild($entry);
 850
 851                         $conv_data['source'] = $doc2->saveXML();
 852
 853                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => Conversation::PARCEL_FEED];
 854                         if (DBA::exists('conversation', $condition)) {
 855                                 Logger::log('Delete deprecated entry for URI '.$conv_data['uri'], Logger::DEBUG);
 856                                 DBA::delete('conversation', ['item-uri' => $conv_data['uri']]);
 857                         }
 858
 859                         Logger::log('Store conversation data for uri '.$conv_data['uri'], Logger::DEBUG);
 860                         Conversation::insert($conv_data);
 861                 }
 862         }
 863
 864         /**
 865          * Fetch the own post so that it can be stored later
 866          *
 867          * We want to store the original data for later processing.
 868          * This function is meant for cases where we process a feed with multiple entries.
 869          * In that case we need to fetch the single posts here.
 870          *
 871          * @param string $self The link to the self item
 872          * @param array  $item The item array
 873          * @return void
 874          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 875          */
 876         private static function fetchSelf($self, array &$item)
 877         {
 878                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 879                 if (DBA::exists('conversation', $condition)) {
 880                         Logger::log('Conversation '.$item['uri'].' is already stored.', Logger::DEBUG);
 881                         return;
 882                 }
 883
 884                 $curlResult = DI::httpRequest()->get($self);
 885
 886                 if (!$curlResult->isSuccess()) {
 887                         return;
 888                 }
 889
 890                 // We reformat the XML to make it better readable
 891                 $doc = new DOMDocument();
 892                 $doc->loadXML($curlResult->getBody());
 893                 $doc->preserveWhiteSpace = false;
 894                 $doc->formatOutput = true;
 895                 $xml = $doc->saveXML();
 896
 897                 $item["protocol"] = Conversation::PARCEL_SALMON;
 898                 $item["source"] = $xml;
 899
 900                 Logger::log('Conversation '.$item['uri'].' is now fetched.', Logger::DEBUG);
 901         }
 902
 903         /**
 904          * Fetch related posts and processes them
 905          *
 906          * @param string $related     The link to the related item
 907          * @param string $related_uri The related item in "uri" format
 908          * @param array  $importer    user record of the importing user
 909          * @return void
 910          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 911          * @throws \ImagickException
 912          */
 913         private static function fetchRelated($related, $related_uri, $importer)
 914         {
 915                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 916                 $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 917                 if (DBA::isResult($conversation)) {
 918                         $stored = true;
 919                         $xml = $conversation['source'];
 920                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 921                                 Logger::log('Got valid cached XML for URI '.$related_uri, Logger::DEBUG);
 922                                 return;
 923                         }
 924                         if ($conversation['protocol'] == Conversation::PARCEL_SALMON) {
 925                                 Logger::log('Delete invalid cached XML for URI '.$related_uri, Logger::DEBUG);
 926                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 927                         }
 928                 }
 929
 930                 $stored = false;
 931                 $curlResult = DI::httpRequest()->get($related, ['accept_content' => 'application/atom+xml, text/html']);
 932
 933                 if (!$curlResult->isSuccess()) {
 934                         return;
 935                 }
 936
 937                 $xml = '';
 938
 939                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 940                         Logger::log('Directly fetched XML for URI ' . $related_uri, Logger::DEBUG);
 941                         $xml = $curlResult->getBody();
 942                 }
 943
 944                 if ($xml == '') {
 945                         $doc = new DOMDocument();
 946                         if (!@$doc->loadHTML($curlResult->getBody())) {
 947                                 return;
 948                         }
 949                         $xpath = new DOMXPath($doc);
 950
 951                         $atom_file = '';
 952
 953                         $links = $xpath->query('//link');
 954                         if ($links) {
 955                                 foreach ($links as $link) {
 956                                         $attribute = self::readAttributes($link);
 957                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 958                                                 $atom_file = $attribute['href'];
 959                                         }
 960                                 }
 961                                 if ($atom_file != '') {
 962                                         $curlResult = DI::httpRequest()->get($atom_file);
 963
 964                                         if ($curlResult->isSuccess()) {
 965                                                 Logger::log('Fetched XML for URI ' . $related_uri, Logger::DEBUG);
 966                                                 $xml = $curlResult->getBody();
 967                                         }
 968                                 }
 969                         }
 970                 }
 971
 972                 // Workaround for older GNU Social servers
 973                 if (($xml == '') && strstr($related, '/notice/')) {
 974                         $curlResult = DI::httpRequest()->get(str_replace('/notice/', '/api/statuses/show/', $related) . '.atom');
 975
 976                         if ($curlResult->isSuccess()) {
 977                                 Logger::log('GNU Social workaround to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 978                                 $xml = $curlResult->getBody();
 979                         }
 980                 }
 981
 982                 // Even more worse workaround for GNU Social ;-)
 983                 if ($xml == '') {
 984                         $related_guess = self::convertHref($related_uri);
 985                         $curlResult = DI::httpRequest()->get(str_replace('/notice/', '/api/statuses/show/', $related_guess) . '.atom');
 986
 987                         if ($curlResult->isSuccess()) {
 988                                 Logger::log('GNU Social workaround 2 to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 989                                 $xml = $curlResult->getBody();
 990                         }
 991                 }
 992
 993                 // Finally we take the data that we fetched from "ostatus:conversation"
 994                 if ($xml == '') {
 995                         $condition = ['item-uri' => $related_uri, 'protocol' => Conversation::PARCEL_SPLIT_CONVERSATION];
 996                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
 997                         if (DBA::isResult($conversation)) {
 998                                 $stored = true;
 999                                 Logger::log('Got cached XML from conversation for URI '.$related_uri, Logger::DEBUG);
1000                                 $xml = $conversation['source'];
1001                         }
1002                 }
1003
1004                 if ($xml != '') {
1005                         self::process($xml, $importer, $contact, $hub, $stored, false);
1006                 } else {
1007                         Logger::log("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, Logger::DEBUG);
1008                 }
1009                 return;
1010         }
1011
1012         /**
1013          * Processes the XML for a repeated post
1014          *
1015          * @param DOMXPath $xpath    The xpath object
1016          * @param object   $entry    The xml entry that is processed
1017          * @param array    $item     The item array
1018          * @param array    $importer user record of the importing user
1019          *
1020          * @return array with data from links
1021          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1022          * @throws \ImagickException
1023          */
1024         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer)
1025         {
1026                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
1027
1028                 if (!is_object($activityobject)) {
1029                         return [];
1030                 }
1031
1032                 $link_data = [];
1033
1034                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
1035
1036                 $links = $xpath->query("atom:link", $activityobject);
1037                 if ($links) {
1038                         $link_data = self::processLinks($links, $item);
1039                 }
1040
1041                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
1042                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
1043                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
1044
1045                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
1046
1047                 $item["author-name"] = $orig_author["author-name"];
1048                 $item["author-link"] = $orig_author["author-link"];
1049                 $item["author-id"] = $orig_author["author-id"];
1050
1051                 $item["body"] = HTML::toBBCode($orig_body);
1052                 $item["created"] = $orig_created;
1053                 $item["edited"] = $orig_edited;
1054
1055                 $item["uri"] = $orig_uri;
1056
1057                 $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
1058
1059                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
1060
1061                 // Mastodon Content Warning
1062                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
1063                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
1064                         if (!empty($clear_text)) {
1065                                 $item['content-warning'] = HTML::toBBCode($clear_text);
1066                         }
1067                 }
1068
1069                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
1070                 if (is_object($inreplyto->item(0))) {
1071                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1072                                 if ($attributes->name == "ref") {
1073                                         $item["thr-parent"] = $attributes->textContent;
1074                                 }
1075                         }
1076                 }
1077
1078                 return $link_data;
1079         }
1080
1081         /**
1082          * Processes links in the XML
1083          *
1084          * @param object $links The xml data that contain links
1085          * @param array  $item  The item array
1086          *
1087          * @return array with data from the links
1088          */
1089         private static function processLinks($links, array &$item)
1090         {
1091                 $link_data = ['add_body' => '', 'self' => ''];
1092
1093                 foreach ($links as $link) {
1094                         $attribute = self::readAttributes($link);
1095
1096                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1097                                 switch ($attribute['rel']) {
1098                                         case "alternate":
1099                                                 $item["plink"] = $attribute['href'];
1100                                                 if (($item["object-type"] == Activity\ObjectType::QUESTION)
1101                                                         || ($item["object-type"] == Activity\ObjectType::EVENT)
1102                                                 ) {
1103                                                         $item["body"] .= "\n" . PageInfo::getFooterFromUrl($attribute['href']);
1104                                                 }
1105                                                 break;
1106                                         case "ostatus:conversation":
1107                                                 $link_data['conversation'] = $attribute['href'];
1108                                                 $item['conversation-href'] = $link_data['conversation'];
1109                                                 if (!isset($item['conversation-uri'])) {
1110                                                         $item['conversation-uri'] = $item['conversation-href'];
1111                                                 }
1112                                                 break;
1113                                         case "enclosure":
1114                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1115                                                 if ($filetype == 'image') {
1116                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1117                                                 } else {
1118                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::DOCUMENT,
1119                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'],
1120                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
1121                                                 }
1122                                                 break;
1123                                         case "related":
1124                                                 if ($item["object-type"] != Activity\ObjectType::BOOKMARK) {
1125                                                         if (!isset($item["thr-parent"])) {
1126                                                                 $item["thr-parent"] = $attribute['href'];
1127                                                         }
1128                                                         $link_data['related'] = $attribute['href'];
1129                                                 } else {
1130                                                         $item["body"] .= "\n" . PageInfo::getFooterFromUrl($attribute['href']);
1131                                                 }
1132                                                 break;
1133                                         case "self":
1134                                                 if (empty($item["plink"])) {
1135                                                         $item["plink"] = $attribute['href'];
1136                                                 }
1137                                                 $link_data['self'] = $attribute['href'];
1138                                                 break;
1139                                 }
1140                         }
1141                 }
1142                 return $link_data;
1143         }
1144
1145         /**
1146          * Create an url out of an uri
1147          *
1148          * @param string $href URI in the format "parameter1:parameter1:..."
1149          *
1150          * @return string URL in the format http(s)://....
1151          */
1152         private static function convertHref($href)
1153         {
1154                 $elements = explode(":", $href);
1155
1156                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1157                         return $href;
1158                 }
1159
1160                 $server = explode(",", $elements[1]);
1161                 $conversation = explode("=", $elements[2]);
1162
1163                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1164                         return "http://".$server[0]."/notice/".$elements[3];
1165                 }
1166
1167                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1168                         return $href;
1169                 }
1170                 if ($elements[3] == "objectType=thread") {
1171                         return "http://".$server[0]."/conversation/".$conversation[1];
1172                 } else {
1173                         return "http://".$server[0]."/notice/".$conversation[1];
1174                 }
1175         }
1176
1177         /**
1178          * Checks if the current post is a reshare
1179          *
1180          * @param array $item The item array of thw post
1181          *
1182          * @return string The guid if the post is a reshare
1183          */
1184         public static function getResharedGuid(array $item)
1185         {
1186                 $reshared = Item::getShareArray($item);
1187                 if (empty($reshared['guid']) || !empty($reshared['comment'])) {
1188                         return '';
1189                 }
1190
1191                 return $reshared['guid'];
1192         }
1193
1194         /**
1195          * Cleans the body of a post if it contains picture links
1196          *
1197          * @param string $body The body
1198          *
1199          * @return string The cleaned body
1200          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1201          */
1202         public static function formatPicturePost($body)
1203         {
1204                 $siteinfo = BBCode::getAttachedData($body);
1205
1206                 if (($siteinfo["type"] == "photo") && (!empty($siteinfo["preview"]) || !empty($siteinfo["image"]))) {
1207                         if (isset($siteinfo["preview"])) {
1208                                 $preview = $siteinfo["preview"];
1209                         } else {
1210                                 $preview = $siteinfo["image"];
1211                         }
1212
1213                         // Is it a remote picture? Then make a smaller preview here
1214                         $preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
1215
1216                         // Is it a local picture? Then make it smaller here
1217                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1218                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1219
1220                         if (isset($siteinfo["url"])) {
1221                                 $url = $siteinfo["url"];
1222                         } else {
1223                                 $url = $siteinfo["image"];
1224                         }
1225
1226                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1227                 }
1228
1229                 return $body;
1230         }
1231
1232         /**
1233          * Adds the header elements to the XML document
1234          *
1235          * @param DOMDocument $doc       XML document
1236          * @param array       $owner     Contact data of the poster
1237          * @param string      $filter    The related feed filter (activity, posts or comments)
1238          *
1239          * @return object header root element
1240          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1241          */
1242         private static function addHeader(DOMDocument $doc, array $owner, $filter)
1243         {
1244                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
1245                 $doc->appendChild($root);
1246
1247                 $root->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1248                 $root->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1249                 $root->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1250                 $root->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1251                 $root->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1252                 $root->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1253                 $root->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1254                 $root->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1255
1256                 $title = '';
1257                 $selfUri = '/feed/' . $owner["nick"] . '/';
1258                 switch ($filter) {
1259                         case 'activity':
1260                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1261                                 $selfUri .= $filter;
1262                                 break;
1263                         case 'posts':
1264                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1265                                 break;
1266                         case 'comments':
1267                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1268                                 $selfUri .= $filter;
1269                                 break;
1270                 }
1271
1272                 $selfUri = "/dfrn_poll/" . $owner["nick"];
1273
1274                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1275                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1276                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
1277                 XML::addElement($doc, $root, "title", $title);
1278                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
1279                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1280                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1281
1282                 $author = self::addAuthor($doc, $owner, true);
1283                 $root->appendChild($author);
1284
1285                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1286                 XML::addElement($doc, $root, "link", "", $attributes);
1287
1288                 /// @TODO We have to find out what this is
1289                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1290                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1291                 ///             "type" => "application/json");
1292                 /// XML::addElement($doc, $root, "link", "", $attributes);
1293
1294                 self::hublinks($doc, $root, $owner["nick"]);
1295
1296                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1297                 XML::addElement($doc, $root, "link", "", $attributes);
1298
1299                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1300                 XML::addElement($doc, $root, "link", "", $attributes);
1301
1302                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1303                 XML::addElement($doc, $root, "link", "", $attributes);
1304
1305                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
1306                 XML::addElement($doc, $root, "link", "", $attributes);
1307
1308                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1309                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1310                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1311                         $members = DBA::count('contact', $condition);
1312                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1313                 }
1314
1315                 return $root;
1316         }
1317
1318         /**
1319          * Add the link to the push hubs to the XML document
1320          *
1321          * @param DOMDocument $doc  XML document
1322          * @param object      $root XML root element where the hub links are added
1323          * @param object      $nick nick
1324          * @return void
1325          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1326          */
1327         public static function hublinks(DOMDocument $doc, $root, $nick)
1328         {
1329                 $h = DI::baseUrl() . '/pubsubhubbub/'.$nick;
1330                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1331         }
1332
1333         /**
1334          * Adds attachment data to the XML document
1335          *
1336          * @param DOMDocument $doc  XML document
1337          * @param object      $root XML root element where the hub links are added
1338          * @param array       $item Data of the item that is to be posted
1339          * @return void
1340          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1341          */
1342         public static function getAttachment(DOMDocument $doc, $root, $item)
1343         {
1344                 $siteinfo = BBCode::getAttachedData($item["body"]);
1345
1346                 switch ($siteinfo["type"]) {
1347                         case 'photo':
1348                                 if (!empty($siteinfo["image"])) {
1349                                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1350                                         if ($imgdata) {
1351                                                 $attributes = ["rel" => "enclosure",
1352                                                                 "href" => $siteinfo["image"],
1353                                                                 "type" => $imgdata["mime"],
1354                                                                 "length" => intval($imgdata["size"])];
1355                                                 XML::addElement($doc, $root, "link", "", $attributes);
1356                                         }
1357                                 }
1358                                 break;
1359                         case 'video':
1360                                 $attributes = ["rel" => "enclosure",
1361                                                 "href" => $siteinfo["url"],
1362                                                 "type" => "text/html; charset=UTF-8",
1363                                                 "length" => "0",
1364                                                 "title" => ($siteinfo["title"] ?? '') ?: $siteinfo["url"],
1365                                 ];
1366                                 XML::addElement($doc, $root, "link", "", $attributes);
1367                                 break;
1368                         default:
1369                                 break;
1370                 }
1371
1372                 if (!DI::config()->get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1373                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1374                         if ($imgdata) {
1375                                 $attributes = ["rel" => "enclosure",
1376                                                 "href" => $siteinfo["image"],
1377                                                 "type" => $imgdata["mime"],
1378                                                 "length" => intval($imgdata["size"])];
1379
1380                                 XML::addElement($doc, $root, "link", "", $attributes);
1381                         }
1382                 }
1383
1384                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
1385                         $attributes = ['rel' => 'enclosure',
1386                                 'href' => $attachment['url'],
1387                                 'type' => $attachment['mimetype']];
1388
1389                         if (!empty($attachment['size'])) {
1390                                 $attributes['length'] = intval($attachment['size']);
1391                         }
1392                         if (!empty($attachment['description'])) {
1393                                 $attributes['title'] = $attachment['description'];
1394                         }
1395
1396                         XML::addElement($doc, $root, 'link', '', $attributes);
1397                 }
1398         }
1399
1400         /**
1401          * Adds the author element to the XML document
1402          *
1403          * @param DOMDocument $doc          XML document
1404          * @param array       $owner        Contact data of the poster
1405          * @param bool        $show_profile Whether to show profile
1406          *
1407          * @return \DOMElement author element
1408          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1409          */
1410         private static function addAuthor(DOMDocument $doc, array $owner, $show_profile = true)
1411         {
1412                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1413                 $author = $doc->createElement("author");
1414                 XML::addElement($doc, $author, "id", $owner["url"]);
1415                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1416                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::GROUP);
1417                 } else {
1418                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::PERSON);
1419                 }
1420
1421                 XML::addElement($doc, $author, "uri", $owner["url"]);
1422                 XML::addElement($doc, $author, "name", $owner["nick"]);
1423                 XML::addElement($doc, $author, "email", $owner["addr"]);
1424                 if ($show_profile) {
1425                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, BBCode::OSTATUS));
1426                 }
1427
1428                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1429                 XML::addElement($doc, $author, "link", "", $attributes);
1430
1431                 $attributes = [
1432                                 "rel" => "avatar",
1433                                 "type" => "image/jpeg", // To-Do?
1434                                 "media:width" => 300,
1435                                 "media:height" => 300,
1436                                 "href" => $owner["photo"]];
1437                 XML::addElement($doc, $author, "link", "", $attributes);
1438
1439                 if (isset($owner["thumb"])) {
1440                         $attributes = [
1441                                         "rel" => "avatar",
1442                                         "type" => "image/jpeg", // To-Do?
1443                                         "media:width" => 80,
1444                                         "media:height" => 80,
1445                                         "href" => $owner["thumb"]];
1446                         XML::addElement($doc, $author, "link", "", $attributes);
1447                 }
1448
1449                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1450                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1451                 if ($show_profile) {
1452                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, BBCode::OSTATUS));
1453
1454                         if (trim($owner["location"]) != "") {
1455                                 $element = $doc->createElement("poco:address");
1456                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1457                                 $author->appendChild($element);
1458                         }
1459                 }
1460
1461                 if (DBA::isResult($profile) && !$show_profile) {
1462                         if (trim($profile["homepage"]) != "") {
1463                                 $urls = $doc->createElement("poco:urls");
1464                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1465                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1466                                 XML::addElement($doc, $urls, "poco:primary", "true");
1467                                 $author->appendChild($urls);
1468                         }
1469
1470                         XML::addElement($doc, $author, "followers", "", ["url" => DI::baseUrl() . "/profile/" . $owner["nick"] . "/contacts/followers"]);
1471                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1472
1473                         if ($profile["publish"]) {
1474                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1475                         }
1476                 }
1477
1478                 return $author;
1479         }
1480
1481         /**
1482          * @TODO Picture attachments should look like this:
1483          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1484          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1485          */
1486
1487         /**
1488          * Returns the given activity if present - otherwise returns the "post" activity
1489          *
1490          * @param array $item Data of the item that is to be posted
1491          *
1492          * @return string activity
1493          */
1494         public static function constructVerb(array $item)
1495         {
1496                 if (!empty($item['verb'])) {
1497                         return $item['verb'];
1498                 }
1499
1500                 return Activity::POST;
1501         }
1502
1503         /**
1504          * Returns the given object type if present - otherwise returns the "note" object type
1505          *
1506          * @param array $item Data of the item that is to be posted
1507          *
1508          * @return string Object type
1509          */
1510         private static function constructObjecttype(array $item)
1511         {
1512                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1513                         return $item['object-type'];
1514                 }
1515
1516                 return Activity\ObjectType::NOTE;
1517         }
1518
1519         /**
1520          * Adds an entry element to the XML document
1521          *
1522          * @param DOMDocument $doc       XML document
1523          * @param array       $item      Data of the item that is to be posted
1524          * @param array       $owner     Contact data of the poster
1525          * @param bool        $toplevel  optional default false
1526          *
1527          * @return \DOMElement Entry element
1528          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1529          * @throws \ImagickException
1530          */
1531         private static function entry(DOMDocument $doc, array $item, array $owner, $toplevel = false)
1532         {
1533                 $xml = null;
1534
1535                 $repeated_guid = self::getResharedGuid($item);
1536                 if ($repeated_guid != "") {
1537                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1538                 }
1539
1540                 if ($xml) {
1541                         return $xml;
1542                 }
1543
1544                 if ($item["verb"] == Activity::LIKE) {
1545                         return self::likeEntry($doc, $item, $owner, $toplevel);
1546                 } elseif (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1547                         return self::followEntry($doc, $item, $owner, $toplevel);
1548                 } else {
1549                         return self::noteEntry($doc, $item, $owner, $toplevel);
1550                 }
1551         }
1552
1553         /**
1554          * Adds a source entry to the XML document
1555          *
1556          * @param DOMDocument $doc     XML document
1557          * @param array       $contact Array of the contact that is added
1558          *
1559          * @return \DOMElement Source element
1560          * @throws \Exception
1561          */
1562         private static function sourceEntry(DOMDocument $doc, array $contact)
1563         {
1564                 $source = $doc->createElement("source");
1565                 XML::addElement($doc, $source, "id", $contact["poll"]);
1566                 XML::addElement($doc, $source, "title", $contact["name"]);
1567                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1568                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1569                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1570                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1571
1572                 return $source;
1573         }
1574
1575         /**
1576          * Adds an entry element with reshared content
1577          *
1578          * @param DOMDocument $doc           XML document
1579          * @param array       $item          Data of the item that is to be posted
1580          * @param array       $owner         Contact data of the poster
1581          * @param string      $repeated_guid guid
1582          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
1583          *
1584          * @return bool Entry element
1585          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1586          * @throws \ImagickException
1587          */
1588         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid, $toplevel)
1589         {
1590                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1591                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1592                 }
1593
1594                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1595
1596                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
1597                         'network' => [Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS]];
1598                 $repeated_item = Item::selectFirst([], $condition);
1599                 if (!DBA::isResult($repeated_item)) {
1600                         return false;
1601                 }
1602
1603                 $contact = Contact::getByURL($repeated_item['author-link']) ?: $owner;
1604
1605                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1606
1607                 self::entryContent($doc, $entry, $item, $owner, $title, Activity::SHARE, false);
1608
1609                 $as_object = $doc->createElement("activity:object");
1610
1611                 XML::addElement($doc, $as_object, "activity:object-type", ActivityNamespace::ACTIVITY_SCHEMA . "activity");
1612
1613                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1614
1615                 $author = self::addAuthor($doc, $contact, false);
1616                 $as_object->appendChild($author);
1617
1618                 $as_object2 = $doc->createElement("activity:object");
1619
1620                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1621
1622                 $title = sprintf("New comment by %s", $contact["nick"]);
1623
1624                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1625
1626                 $as_object->appendChild($as_object2);
1627
1628                 self::entryFooter($doc, $as_object, $item, $owner, false);
1629
1630                 $source = self::sourceEntry($doc, $contact);
1631
1632                 $as_object->appendChild($source);
1633
1634                 $entry->appendChild($as_object);
1635
1636                 self::entryFooter($doc, $entry, $item, $owner, true);
1637
1638                 return $entry;
1639         }
1640
1641         /**
1642          * Adds an entry element with a "like"
1643          *
1644          * @param DOMDocument $doc      XML document
1645          * @param array       $item     Data of the item that is to be posted
1646          * @param array       $owner    Contact data of the poster
1647          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1648          *
1649          * @return \DOMElement Entry element with "like"
1650          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1651          * @throws \ImagickException
1652          */
1653         private static function likeEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1654         {
1655                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1656                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1657                 }
1658
1659                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1660
1661                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . "favorite";
1662                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1663
1664                 $parent = Item::selectFirst([], ['uri' => $item["thr-parent"], 'uid' => $item["uid"]]);
1665                 if (DBA::isResult($parent)) {
1666                         $as_object = $doc->createElement("activity:object");
1667
1668                         XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent));
1669
1670                         self::entryContent($doc, $as_object, $parent, $owner, "New entry");
1671
1672                         $entry->appendChild($as_object);
1673                 }
1674
1675                 self::entryFooter($doc, $entry, $item, $owner);
1676
1677                 return $entry;
1678         }
1679
1680         /**
1681          * Adds the person object element to the XML document
1682          *
1683          * @param DOMDocument $doc     XML document
1684          * @param array       $owner   Contact data of the poster
1685          * @param array       $contact Contact data of the target
1686          *
1687          * @return object author element
1688          */
1689         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact)
1690         {
1691                 $object = $doc->createElement("activity:object");
1692                 XML::addElement($doc, $object, "activity:object-type", Activity\ObjectType::PERSON);
1693
1694                 if ($contact['network'] == Protocol::PHANTOM) {
1695                         XML::addElement($doc, $object, "id", $contact['url']);
1696                         return $object;
1697                 }
1698
1699                 XML::addElement($doc, $object, "id", $contact["alias"]);
1700                 XML::addElement($doc, $object, "title", $contact["nick"]);
1701
1702                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1703                 XML::addElement($doc, $object, "link", "", $attributes);
1704
1705                 $attributes = [
1706                                 "rel" => "avatar",
1707                                 "type" => "image/jpeg", // To-Do?
1708                                 "media:width" => 300,
1709                                 "media:height" => 300,
1710                                 "href" => $contact["photo"]];
1711                 XML::addElement($doc, $object, "link", "", $attributes);
1712
1713                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1714                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1715
1716                 if (trim($contact["location"]) != "") {
1717                         $element = $doc->createElement("poco:address");
1718                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1719                         $object->appendChild($element);
1720                 }
1721
1722                 return $object;
1723         }
1724
1725         /**
1726          * Adds a follow/unfollow entry element
1727          *
1728          * @param DOMDocument $doc      XML document
1729          * @param array       $item     Data of the follow/unfollow message
1730          * @param array       $owner    Contact data of the poster
1731          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1732          *
1733          * @return \DOMElement Entry element
1734          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1735          * @throws \ImagickException
1736          */
1737         private static function followEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1738         {
1739                 $item["id"] = $item['parent'] = 0;
1740                 $item["created"] = $item["edited"] = date("c");
1741                 $item["private"] = Item::PRIVATE;
1742
1743                 $contact = Contact::getByURL($item['follow']);
1744                 $item['follow'] = $contact['url'];
1745
1746                 if ($contact['alias']) {
1747                         $item['follow'] = $contact['alias'];
1748                 } else {
1749                         $contact['alias'] = $contact['url'];
1750                 }
1751
1752                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact["url"])];
1753                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1754
1755                 if (DBA::isResult($user_contact)) {
1756                         $connect_id = $user_contact['id'];
1757                 } else {
1758                         $connect_id = 0;
1759                 }
1760
1761                 if ($item['verb'] == Activity::FOLLOW) {
1762                         $message = DI::l10n()->t('%s is now following %s.');
1763                         $title = DI::l10n()->t('following');
1764                         $action = "subscription";
1765                 } else {
1766                         $message = DI::l10n()->t('%s stopped following %s.');
1767                         $title = DI::l10n()->t('stopped following');
1768                         $action = "unfollow";
1769                 }
1770
1771                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1772                                 = 'tag:' . DI::baseUrl()->getHostname().
1773                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1774                                 ':person:'.$connect_id.':'.$item['created'];
1775
1776                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1777
1778                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1779
1780                 self::entryContent($doc, $entry, $item, $owner, $title);
1781
1782                 $object = self::addPersonObject($doc, $owner, $contact);
1783                 $entry->appendChild($object);
1784
1785                 self::entryFooter($doc, $entry, $item, $owner);
1786
1787                 return $entry;
1788         }
1789
1790         /**
1791          * Adds a regular entry element
1792          *
1793          * @param DOMDocument $doc       XML document
1794          * @param array       $item      Data of the item that is to be posted
1795          * @param array       $owner     Contact data of the poster
1796          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1797          *
1798          * @return \DOMElement Entry element
1799          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1800          * @throws \ImagickException
1801          */
1802         private static function noteEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1803         {
1804                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1805                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1806                 }
1807
1808                 if (!$toplevel) {
1809                         if (!empty($item['title'])) {
1810                                 $title = BBCode::convert($item['title'], false, BBCode::OSTATUS);
1811                         } else {
1812                                 $title = sprintf("New note by %s", $owner["nick"]);
1813                         }
1814                 } else {
1815                         $title = sprintf("New comment by %s", $owner["nick"]);
1816                 }
1817
1818                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1819
1820                 XML::addElement($doc, $entry, "activity:object-type", Activity\ObjectType::NOTE);
1821
1822                 self::entryContent($doc, $entry, $item, $owner, $title, '', true);
1823
1824                 self::entryFooter($doc, $entry, $item, $owner, true);
1825
1826                 return $entry;
1827         }
1828
1829         /**
1830          * Adds a header element to the XML document
1831          *
1832          * @param DOMDocument $doc      XML document
1833          * @param array       $owner    Contact data of the poster
1834          * @param array       $item
1835          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1836          *
1837          * @return \DOMElement The entry element where the elements are added
1838          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1839          * @throws \ImagickException
1840          */
1841         public static function entryHeader(DOMDocument $doc, array $owner, array $item, $toplevel)
1842         {
1843                 if (!$toplevel) {
1844                         $entry = $doc->createElement("entry");
1845
1846                         if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1847                                 $contact = Contact::getByURL($item['author-link']) ?: $owner;
1848                                 $author = self::addAuthor($doc, $contact, false);
1849                                 $entry->appendChild($author);
1850                         }
1851                 } else {
1852                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, "entry");
1853
1854                         $entry->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1855                         $entry->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1856                         $entry->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1857                         $entry->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1858                         $entry->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1859                         $entry->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1860                         $entry->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1861                         $entry->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1862
1863                         $author = self::addAuthor($doc, $owner);
1864                         $entry->appendChild($author);
1865                 }
1866
1867                 return $entry;
1868         }
1869
1870         /**
1871          * Adds elements to the XML document
1872          *
1873          * @param DOMDocument $doc       XML document
1874          * @param \DOMElement $entry     Entry element where the content is added
1875          * @param array       $item      Data of the item that is to be posted
1876          * @param array       $owner     Contact data of the poster
1877          * @param string      $title     Title for the post
1878          * @param string      $verb      The activity verb
1879          * @param bool        $complete  Add the "status_net" element?
1880          * @return void
1881          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1882          */
1883         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, array $owner, $title, $verb = "", $complete = true)
1884         {
1885                 if ($verb == "") {
1886                         $verb = self::constructVerb($item);
1887                 }
1888
1889                 XML::addElement($doc, $entry, "id", $item["uri"]);
1890                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1891
1892                 $body = self::formatPicturePost($item['body']);
1893
1894                 if (!empty($item['title'])) {
1895                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1896                 }
1897
1898                 $body = BBCode::convert($body, false, BBCode::OSTATUS);
1899
1900                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1901
1902                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1903                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
1904                 );
1905
1906                 if ($complete && ($item["id"] > 0)) {
1907                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1908                 }
1909
1910                 XML::addElement($doc, $entry, "activity:verb", $verb);
1911
1912                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1913                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1914         }
1915
1916         /**
1917          * Adds the elements at the foot of an entry to the XML document
1918          *
1919          * @param DOMDocument $doc       XML document
1920          * @param object      $entry     The entry element where the elements are added
1921          * @param array       $item      Data of the item that is to be posted
1922          * @param array       $owner     Contact data of the poster
1923          * @param bool        $complete  default true
1924          * @return void
1925          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1926          */
1927         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, $complete = true)
1928         {
1929                 $mentioned = [];
1930
1931                 if ($item['gravity'] != GRAVITY_PARENT) {
1932                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1933
1934                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $item['thr-parent']]);
1935
1936                         if (DBA::isResult($thrparent)) {
1937                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
1938                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
1939                                 $parent_plink = $thrparent["plink"];
1940                         } else {
1941                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
1942                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
1943                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
1944                         }
1945
1946                         $attributes = [
1947                                         "ref" => $item['thr-parent'],
1948                                         "href" => $parent_plink];
1949                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1950
1951                         $attributes = [
1952                                         "rel" => "related",
1953                                         "href" => $parent_plink];
1954                         XML::addElement($doc, $entry, "link", "", $attributes);
1955                 }
1956
1957                 if (intval($item['parent']) > 0) {
1958                         $conversation_href = $conversation_uri = str_replace('/objects/', '/context/', $item['thr-parent']);
1959
1960                         if (isset($parent_item)) {
1961                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
1962                                 if (DBA::isResult($conversation)) {
1963                                         if ($conversation['conversation-uri'] != '') {
1964                                                 $conversation_uri = $conversation['conversation-uri'];
1965                                         }
1966                                         if ($conversation['conversation-href'] != '') {
1967                                                 $conversation_href = $conversation['conversation-href'];
1968                                         }
1969                                 }
1970                         }
1971
1972                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
1973
1974                         $attributes = [
1975                                         "href" => $conversation_href,
1976                                         "local_id" => $item['parent'],
1977                                         "ref" => $conversation_uri];
1978
1979                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1980                 }
1981
1982                 // uri-id isn't present for follow entry pseudo-items
1983                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
1984                 foreach ($tags as $tag) {
1985                         $mentioned[$tag['url']] = $tag['url'];
1986                 }
1987
1988                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
1989                 $newmentions = [];
1990                 foreach ($mentioned as $mention) {
1991                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
1992                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
1993                 }
1994                 $mentioned = $newmentions;
1995
1996                 foreach ($mentioned as $mention) {
1997                         $contact = Contact::getByURL($mention, false, ['contact-type']);
1998                         if (!empty($contact) && ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1999                                 XML::addElement($doc, $entry, "link", "",
2000                                         [
2001                                                 "rel" => "mentioned",
2002                                                 "ostatus:object-type" => Activity\ObjectType::GROUP,
2003                                                 "href" => $mention]
2004                                 );
2005                         } else {
2006                                 XML::addElement($doc, $entry, "link", "",
2007                                         [
2008                                                 "rel" => "mentioned",
2009                                                 "ostatus:object-type" => Activity\ObjectType::PERSON,
2010                                                 "href" => $mention]
2011                                 );
2012                         }
2013                 }
2014
2015                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
2016                         XML::addElement($doc, $entry, "link", "", [
2017                                 "rel" => "mentioned",
2018                                 "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2019                                 "href" => $owner['url']
2020                         ]);
2021                 }
2022
2023                 if ($item['private'] != Item::PRIVATE) {
2024                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2025                                                                         "href" => "http://activityschema.org/collection/public"]);
2026                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2027                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2028                                                                         "href" => "http://activityschema.org/collection/public"]);
2029                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2030                 }
2031
2032                 foreach ($tags as $tag) {
2033                         if ($tag['type'] == Tag::HASHTAG) {
2034                                 XML::addElement($doc, $entry, "category", "", ["term" => $tag['name']]);
2035                         }
2036                 }
2037
2038                 self::getAttachment($doc, $entry, $item);
2039
2040                 if ($complete && ($item["id"] > 0)) {
2041                         $app = $item["app"];
2042                         if ($app == "") {
2043                                 $app = "web";
2044                         }
2045
2046                         $attributes = ["local_id" => $item["id"], "source" => $app];
2047
2048                         if (isset($parent["id"])) {
2049                                 $attributes["repeat_of"] = $parent["id"];
2050                         }
2051
2052                         if ($item["coord"] != "") {
2053                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2054                         }
2055
2056                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2057                 }
2058         }
2059
2060         /**
2061          * Creates the XML feed for a given nickname
2062          *
2063          * Supported filters:
2064          * - activity (default): all the public posts
2065          * - posts: all the public top-level posts
2066          * - comments: all the public replies
2067          *
2068          * Updates the provided last_update parameter if the result comes from the
2069          * cache or it is empty
2070          *
2071          * @param string  $owner_nick  Nickname of the feed owner
2072          * @param string  $last_update Date of the last update
2073          * @param integer $max_items   Number of maximum items to fetch
2074          * @param string  $filter      Feed items filter (activity, posts or comments)
2075          * @param boolean $nocache     Wether to bypass caching
2076          *
2077          * @return string XML feed
2078          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2079          * @throws \ImagickException
2080          */
2081         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2082         {
2083                 $stamp = microtime(true);
2084
2085                 $owner = User::getOwnerDataByNick($owner_nick);
2086                 if (!$owner) {
2087                         return;
2088                 }
2089
2090                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2091
2092                 $previous_created = $last_update;
2093
2094                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2095                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2096                         $result = DI::cache()->get($cachekey);
2097                         if (!$nocache && !is_null($result)) {
2098                                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', Logger::DEBUG);
2099                                 $last_update = $result['last_update'];
2100                                 return $result['feed'];
2101                         }
2102                 }
2103
2104                 if (!strlen($last_update)) {
2105                         $last_update = 'now -30 days';
2106                 }
2107
2108                 $check_date = DateTimeFormat::utc($last_update);
2109                 $authorid = Contact::getIdForURL($owner["url"]);
2110
2111                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted`
2112                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2113                         $owner["uid"], $check_date, Item::PRIVATE, Protocol::OSTATUS, Protocol::DFRN];
2114
2115                 if ($filter === 'comments') {
2116                         $condition[0] .= " AND `object-type` = ? ";
2117                         $condition[] = Activity\ObjectType::COMMENT;
2118                 }
2119
2120                 if ($owner['contact-type'] != Contact::TYPE_COMMUNITY) {
2121                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2122                         $condition[] = $owner["id"];
2123                         $condition[] = $authorid;
2124                 }
2125
2126                 $params = ['order' => ['received' => true], 'limit' => $max_items];
2127
2128                 if ($filter === 'posts') {
2129                         $ret = Item::selectThread([], $condition, $params);
2130                 } else {
2131                         $ret = Item::select([], $condition, $params);
2132                 }
2133
2134                 $items = Item::inArray($ret);
2135
2136                 $doc = new DOMDocument('1.0', 'utf-8');
2137                 $doc->formatOutput = true;
2138
2139                 $root = self::addHeader($doc, $owner, $filter);
2140
2141                 foreach ($items as $item) {
2142                         if (DI::config()->get('system', 'ostatus_debug')) {
2143                                 $item['body'] .= '🍼';
2144                         }
2145
2146                         if (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW, Activity::LIKE])) {
2147                                 continue;
2148                         }
2149
2150                         $entry = self::entry($doc, $item, $owner, false);
2151                         $root->appendChild($entry);
2152
2153                         if ($last_update < $item['created']) {
2154                                 $last_update = $item['created'];
2155                         }
2156                 }
2157
2158                 $feeddata = trim($doc->saveXML());
2159
2160                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2161                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
2162
2163                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, Logger::DEBUG);
2164
2165                 return $feeddata;
2166         }
2167
2168         /**
2169          * Creates the XML for a salmon message
2170          *
2171          * @param array $item  Data of the item that is to be posted
2172          * @param array $owner Contact data of the poster
2173          *
2174          * @return string XML for the salmon
2175          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2176          * @throws \ImagickException
2177          */
2178         public static function salmon(array $item, array $owner)
2179         {
2180                 $doc = new DOMDocument('1.0', 'utf-8');
2181                 $doc->formatOutput = true;
2182
2183                 if (DI::config()->get('system', 'ostatus_debug')) {
2184                         $item['body'] .= '🐟';
2185                 }
2186
2187                 $entry = self::entry($doc, $item, $owner, true);
2188
2189                 $doc->appendChild($entry);
2190
2191                 return trim($doc->saveXML());
2192         }
2193
2194         /**
2195          * Checks if the given contact url does support OStatus
2196          *
2197          * @param string  $url    profile url
2198          * @return boolean
2199          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2200          * @throws \ImagickException
2201          */
2202         public static function isSupportedByContactUrl($url)
2203         {
2204                 $probe = Probe::uri($url, Protocol::OSTATUS);
2205                 return $probe['network'] == Protocol::OSTATUS;
2206         }
2207 }