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' => $self, 'protocol' => [Conversation::PARCEL_DFRN,
 879                         Conversation::PARCEL_DIASPORA_DFRN, Conversation::PARCEL_LEGACY_DFRN,
 880                         Conversation::PARCEL_LOCAL_DFRN, Conversation::PARCEL_DIRECT, Conversation::PARCEL_SALMON]];
 881                 if (DBA::exists('conversation', $condition)) {
 882                         Logger::log('Conversation '.$item['uri'].' is already stored.', Logger::DEBUG);
 883                         return;
 884                 }
 885
 886                 $curlResult = DI::httpRequest()->get($self);
 887
 888                 if (!$curlResult->isSuccess()) {
 889                         return;
 890                 }
 891
 892                 // We reformat the XML to make it better readable
 893                 $doc = new DOMDocument();
 894                 $doc->loadXML($curlResult->getBody());
 895                 $doc->preserveWhiteSpace = false;
 896                 $doc->formatOutput = true;
 897                 $xml = $doc->saveXML();
 898
 899                 $item["protocol"] = Conversation::PARCEL_SALMON;
 900                 $item["source"] = $xml;
 901
 902                 Logger::log('Conversation '.$item['uri'].' is now fetched.', Logger::DEBUG);
 903         }
 904
 905         /**
 906          * Fetch related posts and processes them
 907          *
 908          * @param string $related     The link to the related item
 909          * @param string $related_uri The related item in "uri" format
 910          * @param array  $importer    user record of the importing user
 911          * @return void
 912          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 913          * @throws \ImagickException
 914          */
 915         private static function fetchRelated($related, $related_uri, $importer)
 916         {
 917                 $condition = ['item-uri' => $related_uri, 'protocol' => [Conversation::PARCEL_DFRN,
 918                         Conversation::PARCEL_DIASPORA_DFRN, Conversation::PARCEL_LEGACY_DFRN,
 919                         Conversation::PARCEL_LOCAL_DFRN, Conversation::PARCEL_DIRECT, Conversation::PARCEL_SALMON]];
 920         if (DBA::exists('conversation', $condition)) {
 921         $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 922                 if (DBA::isResult($conversation)) {
 923                         $stored = true;
 924                         $xml = $conversation['source'];
 925                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 926                                 Logger::log('Got valid cached XML for URI '.$related_uri, Logger::DEBUG);
 927                                 return;
 928                         }
 929                         if ($conversation['protocol'] == Conversation::PARCEL_SALMON) {
 930                                 Logger::log('Delete invalid cached XML for URI '.$related_uri, Logger::DEBUG);
 931                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 932                         }
 933                 }
 934
 935                 $stored = false;
 936                 $curlResult = DI::httpRequest()->get($related, ['accept_content' => 'application/atom+xml, text/html']);
 937
 938                 if (!$curlResult->isSuccess()) {
 939                         return;
 940                 }
 941
 942                 $xml = '';
 943
 944                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 945                         Logger::log('Directly fetched XML for URI ' . $related_uri, Logger::DEBUG);
 946                         $xml = $curlResult->getBody();
 947                 }
 948
 949                 if ($xml == '') {
 950                         $doc = new DOMDocument();
 951                         if (!@$doc->loadHTML($curlResult->getBody())) {
 952                                 return;
 953                         }
 954                         $xpath = new DOMXPath($doc);
 955
 956                         $atom_file = '';
 957
 958                         $links = $xpath->query('//link');
 959                         if ($links) {
 960                                 foreach ($links as $link) {
 961                                         $attribute = self::readAttributes($link);
 962                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 963                                                 $atom_file = $attribute['href'];
 964                                         }
 965                                 }
 966                                 if ($atom_file != '') {
 967                                         $curlResult = DI::httpRequest()->get($atom_file);
 968
 969                                         if ($curlResult->isSuccess()) {
 970                                                 Logger::log('Fetched XML for URI ' . $related_uri, Logger::DEBUG);
 971                                                 $xml = $curlResult->getBody();
 972                                         }
 973                                 }
 974                         }
 975                 }
 976
 977                 // Workaround for older GNU Social servers
 978                 if (($xml == '') && strstr($related, '/notice/')) {
 979                         $curlResult = DI::httpRequest()->get(str_replace('/notice/', '/api/statuses/show/', $related) . '.atom');
 980
 981                         if ($curlResult->isSuccess()) {
 982                                 Logger::log('GNU Social workaround to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 983                                 $xml = $curlResult->getBody();
 984                         }
 985                 }
 986
 987                 // Even more worse workaround for GNU Social ;-)
 988                 if ($xml == '') {
 989                         $related_guess = self::convertHref($related_uri);
 990                         $curlResult = DI::httpRequest()->get(str_replace('/notice/', '/api/statuses/show/', $related_guess) . '.atom');
 991
 992                         if ($curlResult->isSuccess()) {
 993                                 Logger::log('GNU Social workaround 2 to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 994                                 $xml = $curlResult->getBody();
 995                         }
 996                 }
 997
 998                 // Finally we take the data that we fetched from "ostatus:conversation"
 999                 if ($xml == '') {
1000                         $condition = ['item-uri' => $related_uri, 'protocol' => Conversation::PARCEL_SPLIT_CONVERSATION];
1001                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
1002                         if (DBA::isResult($conversation)) {
1003                                 $stored = true;
1004                                 Logger::log('Got cached XML from conversation for URI '.$related_uri, Logger::DEBUG);
1005                                 $xml = $conversation['source'];
1006                         }
1007                 }
1008
1009                 if ($xml != '') {
1010                         self::process($xml, $importer, $contact, $hub, $stored, false);
1011                 } else {
1012                         Logger::log("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, Logger::DEBUG);
1013                 }
1014                 return;
1015         }
1016
1017         /**
1018          * Processes the XML for a repeated post
1019          *
1020          * @param DOMXPath $xpath    The xpath object
1021          * @param object   $entry    The xml entry that is processed
1022          * @param array    $item     The item array
1023          * @param array    $importer user record of the importing user
1024          *
1025          * @return array with data from links
1026          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1027          * @throws \ImagickException
1028          */
1029         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer)
1030         {
1031                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
1032
1033                 if (!is_object($activityobject)) {
1034                         return [];
1035                 }
1036
1037                 $link_data = [];
1038
1039                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
1040
1041                 $links = $xpath->query("atom:link", $activityobject);
1042                 if ($links) {
1043                         $link_data = self::processLinks($links, $item);
1044                 }
1045
1046                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
1047                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
1048                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
1049
1050                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
1051
1052                 $item["author-name"] = $orig_author["author-name"];
1053                 $item["author-link"] = $orig_author["author-link"];
1054                 $item["author-id"] = $orig_author["author-id"];
1055
1056                 $item["body"] = HTML::toBBCode($orig_body);
1057                 $item["created"] = $orig_created;
1058                 $item["edited"] = $orig_edited;
1059
1060                 $item["uri"] = $orig_uri;
1061
1062                 $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
1063
1064                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
1065
1066                 // Mastodon Content Warning
1067                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
1068                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
1069                         if (!empty($clear_text)) {
1070                                 $item['content-warning'] = HTML::toBBCode($clear_text);
1071                         }
1072                 }
1073
1074                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
1075                 if (is_object($inreplyto->item(0))) {
1076                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1077                                 if ($attributes->name == "ref") {
1078                                         $item["thr-parent"] = $attributes->textContent;
1079                                 }
1080                         }
1081                 }
1082
1083                 return $link_data;
1084         }
1085
1086         /**
1087          * Processes links in the XML
1088          *
1089          * @param object $links The xml data that contain links
1090          * @param array  $item  The item array
1091          *
1092          * @return array with data from the links
1093          */
1094         private static function processLinks($links, array &$item)
1095         {
1096                 $link_data = ['add_body' => '', 'self' => ''];
1097
1098                 foreach ($links as $link) {
1099                         $attribute = self::readAttributes($link);
1100
1101                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1102                                 switch ($attribute['rel']) {
1103                                         case "alternate":
1104                                                 $item["plink"] = $attribute['href'];
1105                                                 if (($item["object-type"] == Activity\ObjectType::QUESTION)
1106                                                         || ($item["object-type"] == Activity\ObjectType::EVENT)
1107                                                 ) {
1108                                                         $item["body"] .= "\n" . PageInfo::getFooterFromUrl($attribute['href']);
1109                                                 }
1110                                                 break;
1111                                         case "ostatus:conversation":
1112                                                 $link_data['conversation'] = $attribute['href'];
1113                                                 $item['conversation-href'] = $link_data['conversation'];
1114                                                 if (!isset($item['conversation-uri'])) {
1115                                                         $item['conversation-uri'] = $item['conversation-href'];
1116                                                 }
1117                                                 break;
1118                                         case "enclosure":
1119                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1120                                                 if ($filetype == 'image') {
1121                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1122                                                 } else {
1123                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::DOCUMENT,
1124                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'],
1125                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
1126                                                 }
1127                                                 break;
1128                                         case "related":
1129                                                 if ($item["object-type"] != Activity\ObjectType::BOOKMARK) {
1130                                                         if (!isset($item["thr-parent"])) {
1131                                                                 $item["thr-parent"] = $attribute['href'];
1132                                                         }
1133                                                         $link_data['related'] = $attribute['href'];
1134                                                 } else {
1135                                                         $item["body"] .= "\n" . PageInfo::getFooterFromUrl($attribute['href']);
1136                                                 }
1137                                                 break;
1138                                         case "self":
1139                                                 if (empty($item["plink"])) {
1140                                                         $item["plink"] = $attribute['href'];
1141                                                 }
1142                                                 $link_data['self'] = $attribute['href'];
1143                                                 break;
1144                                 }
1145                         }
1146                 }
1147                 return $link_data;
1148         }
1149
1150         /**
1151          * Create an url out of an uri
1152          *
1153          * @param string $href URI in the format "parameter1:parameter1:..."
1154          *
1155          * @return string URL in the format http(s)://....
1156          */
1157         private static function convertHref($href)
1158         {
1159                 $elements = explode(":", $href);
1160
1161                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1162                         return $href;
1163                 }
1164
1165                 $server = explode(",", $elements[1]);
1166                 $conversation = explode("=", $elements[2]);
1167
1168                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1169                         return "http://".$server[0]."/notice/".$elements[3];
1170                 }
1171
1172                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1173                         return $href;
1174                 }
1175                 if ($elements[3] == "objectType=thread") {
1176                         return "http://".$server[0]."/conversation/".$conversation[1];
1177                 } else {
1178                         return "http://".$server[0]."/notice/".$conversation[1];
1179                 }
1180         }
1181
1182         /**
1183          * Checks if the current post is a reshare
1184          *
1185          * @param array $item The item array of thw post
1186          *
1187          * @return string The guid if the post is a reshare
1188          */
1189         public static function getResharedGuid(array $item)
1190         {
1191                 $reshared = Item::getShareArray($item);
1192                 if (empty($reshared['guid']) || !empty($reshared['comment'])) {
1193                         return '';
1194                 }
1195
1196                 return $reshared['guid'];
1197         }
1198
1199         /**
1200          * Cleans the body of a post if it contains picture links
1201          *
1202          * @param string $body The body
1203          *
1204          * @return string The cleaned body
1205          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1206          */
1207         public static function formatPicturePost($body)
1208         {
1209                 $siteinfo = BBCode::getAttachedData($body);
1210
1211                 if (($siteinfo["type"] == "photo") && (!empty($siteinfo["preview"]) || !empty($siteinfo["image"]))) {
1212                         if (isset($siteinfo["preview"])) {
1213                                 $preview = $siteinfo["preview"];
1214                         } else {
1215                                 $preview = $siteinfo["image"];
1216                         }
1217
1218                         // Is it a remote picture? Then make a smaller preview here
1219                         $preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
1220
1221                         // Is it a local picture? Then make it smaller here
1222                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1223                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1224
1225                         if (isset($siteinfo["url"])) {
1226                                 $url = $siteinfo["url"];
1227                         } else {
1228                                 $url = $siteinfo["image"];
1229                         }
1230
1231                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1232                 }
1233
1234                 return $body;
1235         }
1236
1237         /**
1238          * Adds the header elements to the XML document
1239          *
1240          * @param DOMDocument $doc       XML document
1241          * @param array       $owner     Contact data of the poster
1242          * @param string      $filter    The related feed filter (activity, posts or comments)
1243          *
1244          * @return object header root element
1245          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1246          */
1247         private static function addHeader(DOMDocument $doc, array $owner, $filter)
1248         {
1249                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
1250                 $doc->appendChild($root);
1251
1252                 $root->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1253                 $root->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1254                 $root->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1255                 $root->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1256                 $root->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1257                 $root->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1258                 $root->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1259                 $root->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1260
1261                 $title = '';
1262                 $selfUri = '/feed/' . $owner["nick"] . '/';
1263                 switch ($filter) {
1264                         case 'activity':
1265                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1266                                 $selfUri .= $filter;
1267                                 break;
1268                         case 'posts':
1269                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1270                                 break;
1271                         case 'comments':
1272                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1273                                 $selfUri .= $filter;
1274                                 break;
1275                 }
1276
1277                 $selfUri = "/dfrn_poll/" . $owner["nick"];
1278
1279                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1280                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1281                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
1282                 XML::addElement($doc, $root, "title", $title);
1283                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
1284                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1285                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1286
1287                 $author = self::addAuthor($doc, $owner, true);
1288                 $root->appendChild($author);
1289
1290                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1291                 XML::addElement($doc, $root, "link", "", $attributes);
1292
1293                 /// @TODO We have to find out what this is
1294                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1295                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1296                 ///             "type" => "application/json");
1297                 /// XML::addElement($doc, $root, "link", "", $attributes);
1298
1299                 self::hublinks($doc, $root, $owner["nick"]);
1300
1301                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1302                 XML::addElement($doc, $root, "link", "", $attributes);
1303
1304                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1305                 XML::addElement($doc, $root, "link", "", $attributes);
1306
1307                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1308                 XML::addElement($doc, $root, "link", "", $attributes);
1309
1310                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
1311                 XML::addElement($doc, $root, "link", "", $attributes);
1312
1313                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1314                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1315                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1316                         $members = DBA::count('contact', $condition);
1317                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1318                 }
1319
1320                 return $root;
1321         }
1322
1323         /**
1324          * Add the link to the push hubs to the XML document
1325          *
1326          * @param DOMDocument $doc  XML document
1327          * @param object      $root XML root element where the hub links are added
1328          * @param object      $nick nick
1329          * @return void
1330          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1331          */
1332         public static function hublinks(DOMDocument $doc, $root, $nick)
1333         {
1334                 $h = DI::baseUrl() . '/pubsubhubbub/'.$nick;
1335                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1336         }
1337
1338         /**
1339          * Adds attachment data to the XML document
1340          *
1341          * @param DOMDocument $doc  XML document
1342          * @param object      $root XML root element where the hub links are added
1343          * @param array       $item Data of the item that is to be posted
1344          * @return void
1345          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1346          */
1347         public static function getAttachment(DOMDocument $doc, $root, $item)
1348         {
1349                 $siteinfo = BBCode::getAttachedData($item["body"]);
1350
1351                 switch ($siteinfo["type"]) {
1352                         case 'photo':
1353                                 if (!empty($siteinfo["image"])) {
1354                                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1355                                         if ($imgdata) {
1356                                                 $attributes = ["rel" => "enclosure",
1357                                                                 "href" => $siteinfo["image"],
1358                                                                 "type" => $imgdata["mime"],
1359                                                                 "length" => intval($imgdata["size"])];
1360                                                 XML::addElement($doc, $root, "link", "", $attributes);
1361                                         }
1362                                 }
1363                                 break;
1364                         case 'video':
1365                                 $attributes = ["rel" => "enclosure",
1366                                                 "href" => $siteinfo["url"],
1367                                                 "type" => "text/html; charset=UTF-8",
1368                                                 "length" => "0",
1369                                                 "title" => ($siteinfo["title"] ?? '') ?: $siteinfo["url"],
1370                                 ];
1371                                 XML::addElement($doc, $root, "link", "", $attributes);
1372                                 break;
1373                         default:
1374                                 break;
1375                 }
1376
1377                 if (!DI::config()->get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1378                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1379                         if ($imgdata) {
1380                                 $attributes = ["rel" => "enclosure",
1381                                                 "href" => $siteinfo["image"],
1382                                                 "type" => $imgdata["mime"],
1383                                                 "length" => intval($imgdata["size"])];
1384
1385                                 XML::addElement($doc, $root, "link", "", $attributes);
1386                         }
1387                 }
1388
1389                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
1390                         $attributes = ['rel' => 'enclosure',
1391                                 'href' => $attachment['url'],
1392                                 'type' => $attachment['mimetype']];
1393
1394                         if (!empty($attachment['size'])) {
1395                                 $attributes['length'] = intval($attachment['size']);
1396                         }
1397                         if (!empty($attachment['description'])) {
1398                                 $attributes['title'] = $attachment['description'];
1399                         }
1400
1401                         XML::addElement($doc, $root, 'link', '', $attributes);
1402                 }
1403         }
1404
1405         /**
1406          * Adds the author element to the XML document
1407          *
1408          * @param DOMDocument $doc          XML document
1409          * @param array       $owner        Contact data of the poster
1410          * @param bool        $show_profile Whether to show profile
1411          *
1412          * @return \DOMElement author element
1413          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1414          */
1415         private static function addAuthor(DOMDocument $doc, array $owner, $show_profile = true)
1416         {
1417                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1418                 $author = $doc->createElement("author");
1419                 XML::addElement($doc, $author, "id", $owner["url"]);
1420                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1421                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::GROUP);
1422                 } else {
1423                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::PERSON);
1424                 }
1425
1426                 XML::addElement($doc, $author, "uri", $owner["url"]);
1427                 XML::addElement($doc, $author, "name", $owner["nick"]);
1428                 XML::addElement($doc, $author, "email", $owner["addr"]);
1429                 if ($show_profile) {
1430                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, BBCode::OSTATUS));
1431                 }
1432
1433                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1434                 XML::addElement($doc, $author, "link", "", $attributes);
1435
1436                 $attributes = [
1437                                 "rel" => "avatar",
1438                                 "type" => "image/jpeg", // To-Do?
1439                                 "media:width" => 300,
1440                                 "media:height" => 300,
1441                                 "href" => $owner["photo"]];
1442                 XML::addElement($doc, $author, "link", "", $attributes);
1443
1444                 if (isset($owner["thumb"])) {
1445                         $attributes = [
1446                                         "rel" => "avatar",
1447                                         "type" => "image/jpeg", // To-Do?
1448                                         "media:width" => 80,
1449                                         "media:height" => 80,
1450                                         "href" => $owner["thumb"]];
1451                         XML::addElement($doc, $author, "link", "", $attributes);
1452                 }
1453
1454                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1455                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1456                 if ($show_profile) {
1457                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, BBCode::OSTATUS));
1458
1459                         if (trim($owner["location"]) != "") {
1460                                 $element = $doc->createElement("poco:address");
1461                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1462                                 $author->appendChild($element);
1463                         }
1464                 }
1465
1466                 if (DBA::isResult($profile) && !$show_profile) {
1467                         if (trim($profile["homepage"]) != "") {
1468                                 $urls = $doc->createElement("poco:urls");
1469                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1470                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1471                                 XML::addElement($doc, $urls, "poco:primary", "true");
1472                                 $author->appendChild($urls);
1473                         }
1474
1475                         XML::addElement($doc, $author, "followers", "", ["url" => DI::baseUrl() . "/profile/" . $owner["nick"] . "/contacts/followers"]);
1476                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1477
1478                         if ($profile["publish"]) {
1479                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1480                         }
1481                 }
1482
1483                 return $author;
1484         }
1485
1486         /**
1487          * @TODO Picture attachments should look like this:
1488          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1489          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1490          */
1491
1492         /**
1493          * Returns the given activity if present - otherwise returns the "post" activity
1494          *
1495          * @param array $item Data of the item that is to be posted
1496          *
1497          * @return string activity
1498          */
1499         public static function constructVerb(array $item)
1500         {
1501                 if (!empty($item['verb'])) {
1502                         return $item['verb'];
1503                 }
1504
1505                 return Activity::POST;
1506         }
1507
1508         /**
1509          * Returns the given object type if present - otherwise returns the "note" object type
1510          *
1511          * @param array $item Data of the item that is to be posted
1512          *
1513          * @return string Object type
1514          */
1515         private static function constructObjecttype(array $item)
1516         {
1517                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1518                         return $item['object-type'];
1519                 }
1520
1521                 return Activity\ObjectType::NOTE;
1522         }
1523
1524         /**
1525          * Adds an entry element to the XML document
1526          *
1527          * @param DOMDocument $doc       XML document
1528          * @param array       $item      Data of the item that is to be posted
1529          * @param array       $owner     Contact data of the poster
1530          * @param bool        $toplevel  optional default false
1531          *
1532          * @return \DOMElement Entry element
1533          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1534          * @throws \ImagickException
1535          */
1536         private static function entry(DOMDocument $doc, array $item, array $owner, $toplevel = false)
1537         {
1538                 $xml = null;
1539
1540                 $repeated_guid = self::getResharedGuid($item);
1541                 if ($repeated_guid != "") {
1542                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1543                 }
1544
1545                 if ($xml) {
1546                         return $xml;
1547                 }
1548
1549                 if ($item["verb"] == Activity::LIKE) {
1550                         return self::likeEntry($doc, $item, $owner, $toplevel);
1551                 } elseif (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1552                         return self::followEntry($doc, $item, $owner, $toplevel);
1553                 } else {
1554                         return self::noteEntry($doc, $item, $owner, $toplevel);
1555                 }
1556         }
1557
1558         /**
1559          * Adds a source entry to the XML document
1560          *
1561          * @param DOMDocument $doc     XML document
1562          * @param array       $contact Array of the contact that is added
1563          *
1564          * @return \DOMElement Source element
1565          * @throws \Exception
1566          */
1567         private static function sourceEntry(DOMDocument $doc, array $contact)
1568         {
1569                 $source = $doc->createElement("source");
1570                 XML::addElement($doc, $source, "id", $contact["poll"]);
1571                 XML::addElement($doc, $source, "title", $contact["name"]);
1572                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1573                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1574                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1575                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1576
1577                 return $source;
1578         }
1579
1580         /**
1581          * Adds an entry element with reshared content
1582          *
1583          * @param DOMDocument $doc           XML document
1584          * @param array       $item          Data of the item that is to be posted
1585          * @param array       $owner         Contact data of the poster
1586          * @param string      $repeated_guid guid
1587          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
1588          *
1589          * @return bool Entry element
1590          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1591          * @throws \ImagickException
1592          */
1593         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid, $toplevel)
1594         {
1595                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1596                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1597                 }
1598
1599                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1600
1601                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
1602                         'network' => [Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS]];
1603                 $repeated_item = Item::selectFirst([], $condition);
1604                 if (!DBA::isResult($repeated_item)) {
1605                         return false;
1606                 }
1607
1608                 $contact = Contact::getByURL($repeated_item['author-link']) ?: $owner;
1609
1610                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1611
1612                 self::entryContent($doc, $entry, $item, $owner, $title, Activity::SHARE, false);
1613
1614                 $as_object = $doc->createElement("activity:object");
1615
1616                 XML::addElement($doc, $as_object, "activity:object-type", ActivityNamespace::ACTIVITY_SCHEMA . "activity");
1617
1618                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1619
1620                 $author = self::addAuthor($doc, $contact, false);
1621                 $as_object->appendChild($author);
1622
1623                 $as_object2 = $doc->createElement("activity:object");
1624
1625                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1626
1627                 $title = sprintf("New comment by %s", $contact["nick"]);
1628
1629                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1630
1631                 $as_object->appendChild($as_object2);
1632
1633                 self::entryFooter($doc, $as_object, $item, $owner, false);
1634
1635                 $source = self::sourceEntry($doc, $contact);
1636
1637                 $as_object->appendChild($source);
1638
1639                 $entry->appendChild($as_object);
1640
1641                 self::entryFooter($doc, $entry, $item, $owner, true);
1642
1643                 return $entry;
1644         }
1645
1646         /**
1647          * Adds an entry element with a "like"
1648          *
1649          * @param DOMDocument $doc      XML document
1650          * @param array       $item     Data of the item that is to be posted
1651          * @param array       $owner    Contact data of the poster
1652          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1653          *
1654          * @return \DOMElement Entry element with "like"
1655          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1656          * @throws \ImagickException
1657          */
1658         private static function likeEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1659         {
1660                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1661                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1662                 }
1663
1664                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1665
1666                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . "favorite";
1667                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1668
1669                 $parent = Item::selectFirst([], ['uri' => $item["thr-parent"], 'uid' => $item["uid"]]);
1670                 if (DBA::isResult($parent)) {
1671                         $as_object = $doc->createElement("activity:object");
1672
1673                         XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent));
1674
1675                         self::entryContent($doc, $as_object, $parent, $owner, "New entry");
1676
1677                         $entry->appendChild($as_object);
1678                 }
1679
1680                 self::entryFooter($doc, $entry, $item, $owner);
1681
1682                 return $entry;
1683         }
1684
1685         /**
1686          * Adds the person object element to the XML document
1687          *
1688          * @param DOMDocument $doc     XML document
1689          * @param array       $owner   Contact data of the poster
1690          * @param array       $contact Contact data of the target
1691          *
1692          * @return object author element
1693          */
1694         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact)
1695         {
1696                 $object = $doc->createElement("activity:object");
1697                 XML::addElement($doc, $object, "activity:object-type", Activity\ObjectType::PERSON);
1698
1699                 if ($contact['network'] == Protocol::PHANTOM) {
1700                         XML::addElement($doc, $object, "id", $contact['url']);
1701                         return $object;
1702                 }
1703
1704                 XML::addElement($doc, $object, "id", $contact["alias"]);
1705                 XML::addElement($doc, $object, "title", $contact["nick"]);
1706
1707                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1708                 XML::addElement($doc, $object, "link", "", $attributes);
1709
1710                 $attributes = [
1711                                 "rel" => "avatar",
1712                                 "type" => "image/jpeg", // To-Do?
1713                                 "media:width" => 300,
1714                                 "media:height" => 300,
1715                                 "href" => $contact["photo"]];
1716                 XML::addElement($doc, $object, "link", "", $attributes);
1717
1718                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1719                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1720
1721                 if (trim($contact["location"]) != "") {
1722                         $element = $doc->createElement("poco:address");
1723                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1724                         $object->appendChild($element);
1725                 }
1726
1727                 return $object;
1728         }
1729
1730         /**
1731          * Adds a follow/unfollow entry element
1732          *
1733          * @param DOMDocument $doc      XML document
1734          * @param array       $item     Data of the follow/unfollow message
1735          * @param array       $owner    Contact data of the poster
1736          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1737          *
1738          * @return \DOMElement Entry element
1739          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1740          * @throws \ImagickException
1741          */
1742         private static function followEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1743         {
1744                 $item["id"] = $item['parent'] = 0;
1745                 $item["created"] = $item["edited"] = date("c");
1746                 $item["private"] = Item::PRIVATE;
1747
1748                 $contact = Contact::getByURL($item['follow']);
1749                 $item['follow'] = $contact['url'];
1750
1751                 if ($contact['alias']) {
1752                         $item['follow'] = $contact['alias'];
1753                 } else {
1754                         $contact['alias'] = $contact['url'];
1755                 }
1756
1757                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact["url"])];
1758                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1759
1760                 if (DBA::isResult($user_contact)) {
1761                         $connect_id = $user_contact['id'];
1762                 } else {
1763                         $connect_id = 0;
1764                 }
1765
1766                 if ($item['verb'] == Activity::FOLLOW) {
1767                         $message = DI::l10n()->t('%s is now following %s.');
1768                         $title = DI::l10n()->t('following');
1769                         $action = "subscription";
1770                 } else {
1771                         $message = DI::l10n()->t('%s stopped following %s.');
1772                         $title = DI::l10n()->t('stopped following');
1773                         $action = "unfollow";
1774                 }
1775
1776                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1777                                 = 'tag:' . DI::baseUrl()->getHostname().
1778                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1779                                 ':person:'.$connect_id.':'.$item['created'];
1780
1781                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1782
1783                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1784
1785                 self::entryContent($doc, $entry, $item, $owner, $title);
1786
1787                 $object = self::addPersonObject($doc, $owner, $contact);
1788                 $entry->appendChild($object);
1789
1790                 self::entryFooter($doc, $entry, $item, $owner);
1791
1792                 return $entry;
1793         }
1794
1795         /**
1796          * Adds a regular entry element
1797          *
1798          * @param DOMDocument $doc       XML document
1799          * @param array       $item      Data of the item that is to be posted
1800          * @param array       $owner     Contact data of the poster
1801          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1802          *
1803          * @return \DOMElement Entry element
1804          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1805          * @throws \ImagickException
1806          */
1807         private static function noteEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1808         {
1809                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1810                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1811                 }
1812
1813                 if (!$toplevel) {
1814                         if (!empty($item['title'])) {
1815                                 $title = BBCode::convert($item['title'], false, BBCode::OSTATUS);
1816                         } else {
1817                                 $title = sprintf("New note by %s", $owner["nick"]);
1818                         }
1819                 } else {
1820                         $title = sprintf("New comment by %s", $owner["nick"]);
1821                 }
1822
1823                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1824
1825                 XML::addElement($doc, $entry, "activity:object-type", Activity\ObjectType::NOTE);
1826
1827                 self::entryContent($doc, $entry, $item, $owner, $title, '', true);
1828
1829                 self::entryFooter($doc, $entry, $item, $owner, true);
1830
1831                 return $entry;
1832         }
1833
1834         /**
1835          * Adds a header element to the XML document
1836          *
1837          * @param DOMDocument $doc      XML document
1838          * @param array       $owner    Contact data of the poster
1839          * @param array       $item
1840          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1841          *
1842          * @return \DOMElement The entry element where the elements are added
1843          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1844          * @throws \ImagickException
1845          */
1846         public static function entryHeader(DOMDocument $doc, array $owner, array $item, $toplevel)
1847         {
1848                 if (!$toplevel) {
1849                         $entry = $doc->createElement("entry");
1850
1851                         if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1852                                 $contact = Contact::getByURL($item['author-link']) ?: $owner;
1853                                 $author = self::addAuthor($doc, $contact, false);
1854                                 $entry->appendChild($author);
1855                         }
1856                 } else {
1857                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, "entry");
1858
1859                         $entry->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1860                         $entry->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1861                         $entry->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1862                         $entry->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1863                         $entry->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1864                         $entry->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1865                         $entry->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1866                         $entry->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1867
1868                         $author = self::addAuthor($doc, $owner);
1869                         $entry->appendChild($author);
1870                 }
1871
1872                 return $entry;
1873         }
1874
1875         /**
1876          * Adds elements to the XML document
1877          *
1878          * @param DOMDocument $doc       XML document
1879          * @param \DOMElement $entry     Entry element where the content is added
1880          * @param array       $item      Data of the item that is to be posted
1881          * @param array       $owner     Contact data of the poster
1882          * @param string      $title     Title for the post
1883          * @param string      $verb      The activity verb
1884          * @param bool        $complete  Add the "status_net" element?
1885          * @return void
1886          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1887          */
1888         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, array $owner, $title, $verb = "", $complete = true)
1889         {
1890                 if ($verb == "") {
1891                         $verb = self::constructVerb($item);
1892                 }
1893
1894                 XML::addElement($doc, $entry, "id", $item["uri"]);
1895                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1896
1897                 $body = self::formatPicturePost($item['body']);
1898
1899                 if (!empty($item['title'])) {
1900                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1901                 }
1902
1903                 $body = BBCode::convert($body, false, BBCode::OSTATUS);
1904
1905                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1906
1907                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1908                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
1909                 );
1910
1911                 if ($complete && ($item["id"] > 0)) {
1912                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1913                 }
1914
1915                 XML::addElement($doc, $entry, "activity:verb", $verb);
1916
1917                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1918                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1919         }
1920
1921         /**
1922          * Adds the elements at the foot of an entry to the XML document
1923          *
1924          * @param DOMDocument $doc       XML document
1925          * @param object      $entry     The entry element where the elements are added
1926          * @param array       $item      Data of the item that is to be posted
1927          * @param array       $owner     Contact data of the poster
1928          * @param bool        $complete  default true
1929          * @return void
1930          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1931          */
1932         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, $complete = true)
1933         {
1934                 $mentioned = [];
1935
1936                 if ($item['gravity'] != GRAVITY_PARENT) {
1937                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1938
1939                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $item['thr-parent']]);
1940
1941                         if (DBA::isResult($thrparent)) {
1942                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
1943                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
1944                                 $parent_plink = $thrparent["plink"];
1945                         } else {
1946                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
1947                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
1948                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
1949                         }
1950
1951                         $attributes = [
1952                                         "ref" => $item['thr-parent'],
1953                                         "href" => $parent_plink];
1954                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1955
1956                         $attributes = [
1957                                         "rel" => "related",
1958                                         "href" => $parent_plink];
1959                         XML::addElement($doc, $entry, "link", "", $attributes);
1960                 }
1961
1962                 if (intval($item['parent']) > 0) {
1963                         $conversation_href = $conversation_uri = str_replace('/objects/', '/context/', $item['thr-parent']);
1964
1965                         if (isset($parent_item)) {
1966                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
1967                                 if (DBA::isResult($conversation)) {
1968                                         if ($conversation['conversation-uri'] != '') {
1969                                                 $conversation_uri = $conversation['conversation-uri'];
1970                                         }
1971                                         if ($conversation['conversation-href'] != '') {
1972                                                 $conversation_href = $conversation['conversation-href'];
1973                                         }
1974                                 }
1975                         }
1976
1977                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
1978
1979                         $attributes = [
1980                                         "href" => $conversation_href,
1981                                         "local_id" => $item['parent'],
1982                                         "ref" => $conversation_uri];
1983
1984                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1985                 }
1986
1987                 // uri-id isn't present for follow entry pseudo-items
1988                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
1989                 foreach ($tags as $tag) {
1990                         $mentioned[$tag['url']] = $tag['url'];
1991                 }
1992
1993                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
1994                 $newmentions = [];
1995                 foreach ($mentioned as $mention) {
1996                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
1997                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
1998                 }
1999                 $mentioned = $newmentions;
2000
2001                 foreach ($mentioned as $mention) {
2002                         $contact = Contact::getByURL($mention, false, ['contact-type']);
2003                         if (!empty($contact) && ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
2004                                 XML::addElement($doc, $entry, "link", "",
2005                                         [
2006                                                 "rel" => "mentioned",
2007                                                 "ostatus:object-type" => Activity\ObjectType::GROUP,
2008                                                 "href" => $mention]
2009                                 );
2010                         } else {
2011                                 XML::addElement($doc, $entry, "link", "",
2012                                         [
2013                                                 "rel" => "mentioned",
2014                                                 "ostatus:object-type" => Activity\ObjectType::PERSON,
2015                                                 "href" => $mention]
2016                                 );
2017                         }
2018                 }
2019
2020                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
2021                         XML::addElement($doc, $entry, "link", "", [
2022                                 "rel" => "mentioned",
2023                                 "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2024                                 "href" => $owner['url']
2025                         ]);
2026                 }
2027
2028                 if ($item['private'] != Item::PRIVATE) {
2029                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2030                                                                         "href" => "http://activityschema.org/collection/public"]);
2031                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2032                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2033                                                                         "href" => "http://activityschema.org/collection/public"]);
2034                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2035                 }
2036
2037                 foreach ($tags as $tag) {
2038                         if ($tag['type'] == Tag::HASHTAG) {
2039                                 XML::addElement($doc, $entry, "category", "", ["term" => $tag['name']]);
2040                         }
2041                 }
2042
2043                 self::getAttachment($doc, $entry, $item);
2044
2045                 if ($complete && ($item["id"] > 0)) {
2046                         $app = $item["app"];
2047                         if ($app == "") {
2048                                 $app = "web";
2049                         }
2050
2051                         $attributes = ["local_id" => $item["id"], "source" => $app];
2052
2053                         if (isset($parent["id"])) {
2054                                 $attributes["repeat_of"] = $parent["id"];
2055                         }
2056
2057                         if ($item["coord"] != "") {
2058                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2059                         }
2060
2061                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2062                 }
2063         }
2064
2065         /**
2066          * Creates the XML feed for a given nickname
2067          *
2068          * Supported filters:
2069          * - activity (default): all the public posts
2070          * - posts: all the public top-level posts
2071          * - comments: all the public replies
2072          *
2073          * Updates the provided last_update parameter if the result comes from the
2074          * cache or it is empty
2075          *
2076          * @param string  $owner_nick  Nickname of the feed owner
2077          * @param string  $last_update Date of the last update
2078          * @param integer $max_items   Number of maximum items to fetch
2079          * @param string  $filter      Feed items filter (activity, posts or comments)
2080          * @param boolean $nocache     Wether to bypass caching
2081          *
2082          * @return string XML feed
2083          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2084          * @throws \ImagickException
2085          */
2086         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2087         {
2088                 $stamp = microtime(true);
2089
2090                 $owner = User::getOwnerDataByNick($owner_nick);
2091                 if (!$owner) {
2092                         return;
2093                 }
2094
2095                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2096
2097                 $previous_created = $last_update;
2098
2099                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2100                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2101                         $result = DI::cache()->get($cachekey);
2102                         if (!$nocache && !is_null($result)) {
2103                                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', Logger::DEBUG);
2104                                 $last_update = $result['last_update'];
2105                                 return $result['feed'];
2106                         }
2107                 }
2108
2109                 if (!strlen($last_update)) {
2110                         $last_update = 'now -30 days';
2111                 }
2112
2113                 $check_date = DateTimeFormat::utc($last_update);
2114                 $authorid = Contact::getIdForURL($owner["url"]);
2115
2116                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted`
2117                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2118                         $owner["uid"], $check_date, Item::PRIVATE, Protocol::OSTATUS, Protocol::DFRN];
2119
2120                 if ($filter === 'comments') {
2121                         $condition[0] .= " AND `object-type` = ? ";
2122                         $condition[] = Activity\ObjectType::COMMENT;
2123                 }
2124
2125                 if ($owner['contact-type'] != Contact::TYPE_COMMUNITY) {
2126                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2127                         $condition[] = $owner["id"];
2128                         $condition[] = $authorid;
2129                 }
2130
2131                 $params = ['order' => ['received' => true], 'limit' => $max_items];
2132
2133                 if ($filter === 'posts') {
2134                         $ret = Item::selectThread([], $condition, $params);
2135                 } else {
2136                         $ret = Item::select([], $condition, $params);
2137                 }
2138
2139                 $items = Item::inArray($ret);
2140
2141                 $doc = new DOMDocument('1.0', 'utf-8');
2142                 $doc->formatOutput = true;
2143
2144                 $root = self::addHeader($doc, $owner, $filter);
2145
2146                 foreach ($items as $item) {
2147                         if (DI::config()->get('system', 'ostatus_debug')) {
2148                                 $item['body'] .= '🍼';
2149                         }
2150
2151                         if (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW, Activity::LIKE])) {
2152                                 continue;
2153                         }
2154
2155                         $entry = self::entry($doc, $item, $owner, false);
2156                         $root->appendChild($entry);
2157
2158                         if ($last_update < $item['created']) {
2159                                 $last_update = $item['created'];
2160                         }
2161                 }
2162
2163                 $feeddata = trim($doc->saveXML());
2164
2165                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2166                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
2167
2168                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, Logger::DEBUG);
2169
2170                 return $feeddata;
2171         }
2172
2173         /**
2174          * Creates the XML for a salmon message
2175          *
2176          * @param array $item  Data of the item that is to be posted
2177          * @param array $owner Contact data of the poster
2178          *
2179          * @return string XML for the salmon
2180          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2181          * @throws \ImagickException
2182          */
2183         public static function salmon(array $item, array $owner)
2184         {
2185                 $doc = new DOMDocument('1.0', 'utf-8');
2186                 $doc->formatOutput = true;
2187
2188                 if (DI::config()->get('system', 'ostatus_debug')) {
2189                         $item['body'] .= '🐟';
2190                 }
2191
2192                 $entry = self::entry($doc, $item, $owner, true);
2193
2194                 $doc->appendChild($entry);
2195
2196                 return trim($doc->saveXML());
2197         }
2198
2199         /**
2200          * Checks if the given contact url does support OStatus
2201          *
2202          * @param string  $url    profile url
2203          * @return boolean
2204          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2205          * @throws \ImagickException
2206          */
2207         public static function isSupportedByContactUrl($url)
2208         {
2209                 $probe = Probe::uri($url, Protocol::OSTATUS);
2210                 return $probe['network'] == Protocol::OSTATUS;
2211         }
2212 }