src/Protocol/OStatus.php

   1 <?php
   2 /**
   3  * @file src/Protocol/OStatus.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 use Friendica\Content\Text\BBCode;
   8 use Friendica\Core\Cache;
   9 use Friendica\Core\Config;
  10 use Friendica\Core\L10n;
  11 use Friendica\Core\System;
  12 use Friendica\Database\DBM;
  13 use Friendica\Model\Contact;
  14 use Friendica\Model\Conversation;
  15 use Friendica\Model\GContact;
  16 use Friendica\Model\Item;
  17 use Friendica\Network\Probe;
  18 use Friendica\Object\Image;
  19 use Friendica\Util\DateTimeFormat;
  20 use Friendica\Util\Lock;
  21 use Friendica\Util\Network;
  22 use Friendica\Util\XML;
  23 use dba;
  24 use DOMDocument;
  25 use DOMXPath;
  26
  27 require_once 'include/dba.php';
  28 require_once 'include/html2bbcode.php';
  29 require_once 'include/bbcode.php';
  30 require_once 'include/items.php';
  31 require_once 'mod/share.php';
  32 require_once 'include/enotify.php';
  33 require_once 'include/api.php';
  34 require_once 'mod/proxy.php';
  35
  36 /**
  37  * @brief This class contain functions for the OStatus protocol
  38  */
  39 class OStatus
  40 {
  41         private static $itemlist;
  42         private static $conv_list = [];
  43
  44         /**
  45          * @brief Fetches author data
  46          *
  47          * @param object $xpath     The xpath object
  48          * @param object $context   The xml context of the author details
  49          * @param array  $importer  user record of the importing user
  50          * @param array  $contact   Called by reference, will contain the fetched contact
  51          * @param bool   $onlyfetch Only fetch the header without updating the contact entries
  52          *
  53          * @return array Array of author related entries for the item
  54          */
  55         private static function fetchAuthor($xpath, $context, $importer, &$contact, $onlyfetch)
  56         {
  57                 $author = [];
  58                 $author["author-link"] = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
  59                 $author["author-name"] = $xpath->evaluate('atom:author/atom:name/text()', $context)->item(0)->nodeValue;
  60                 $addr = $xpath->evaluate('atom:author/atom:email/text()', $context)->item(0)->nodeValue;
  61
  62                 $aliaslink = $author["author-link"];
  63
  64                 $alternate = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0)->attributes;
  65                 if (is_object($alternate)) {
  66                         foreach ($alternate as $attributes) {
  67                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
  68                                         $author["author-link"] = $attributes->textContent;
  69                                 }
  70                         }
  71                 }
  72                 $author["contact-id"] = $contact["id"];
  73
  74                 $contact = null;
  75                 if ($aliaslink != '') {
  76                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ?",
  77                                         $importer["uid"], $aliaslink, NETWORK_STATUSNET];
  78                         $contact = dba::selectFirst('contact', [], $condition);
  79                 }
  80
  81                 if (!DBM::is_result($contact) && $author["author-link"] != '') {
  82                         if ($aliaslink == "") {
  83                                 $aliaslink = $author["author-link"];
  84                         }
  85
  86                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ?", $importer["uid"],
  87                                         normalise_link($author["author-link"]), normalise_link($aliaslink), NETWORK_STATUSNET];
  88                         $contact = dba::selectFirst('contact', [], $condition);
  89                 }
  90
  91                 if (!DBM::is_result($contact) && ($addr != '')) {
  92                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ?",
  93                                         $importer["uid"], $addr, NETWORK_STATUSNET];
  94                         $contact = dba::selectFirst('contact', [], $condition);
  95                 }
  96
  97                 if (DBM::is_result($contact)) {
  98                         if ($contact['blocked']) {
  99                                 $contact['id'] = -1;
 100                         }
 101                         $author["contact-id"] = $contact["id"];
 102                 }
 103
 104                 $avatarlist = [];
 105                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 106                 foreach ($avatars as $avatar) {
 107                         $href = "";
 108                         $width = 0;
 109                         foreach ($avatar->attributes as $attributes) {
 110                                 if ($attributes->name == "href") {
 111                                         $href = $attributes->textContent;
 112                                 }
 113                                 if ($attributes->name == "width") {
 114                                         $width = $attributes->textContent;
 115                                 }
 116                         }
 117                         if ($href != "") {
 118                                 $avatarlist[$width] = $href;
 119                         }
 120                 }
 121                 if (count($avatarlist) > 0) {
 122                         krsort($avatarlist);
 123                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 124                 }
 125
 126                 $displayname = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
 127                 if ($displayname != "") {
 128                         $author["author-name"] = $displayname;
 129                 }
 130
 131                 $author["owner-name"] = $author["author-name"];
 132                 $author["owner-link"] = $author["author-link"];
 133                 $author["owner-avatar"] = $author["author-avatar"];
 134
 135                 // Only update the contacts if it is an OStatus contact
 136                 if (DBM::is_result($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact["network"] == NETWORK_OSTATUS)) {
 137
 138                         // Update contact data
 139                         $current = $contact;
 140                         unset($current['name-date']);
 141
 142                         // This query doesn't seem to work
 143                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 144                         // if ($value != "")
 145                         //      $contact["notify"] = $value;
 146
 147                         // This query doesn't seem to work as well - I hate these queries
 148                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 149                         // if ($value != "")
 150                         //      $contact["poll"] = $value;
 151
 152                         $contact['url'] = $author["author-link"];
 153                         $contact['nurl'] = normalise_link($contact['url']);
 154
 155                         $value = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
 156                         if ($value != "") {
 157                                 $contact["alias"] = $value;
 158                         }
 159
 160                         $value = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
 161                         if ($value != "") {
 162                                 $contact["name"] = $value;
 163                         }
 164
 165                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $context)->item(0)->nodeValue;
 166                         if ($value != "") {
 167                                 $contact["nick"] = $value;
 168                         }
 169
 170                         $value = $xpath->evaluate('atom:author/poco:note/text()', $context)->item(0)->nodeValue;
 171                         if ($value != "") {
 172                                 $contact["about"] = html2bbcode($value);
 173                         }
 174
 175                         $value = $xpath->evaluate('atom:author/poco:address/poco:formatted/text()', $context)->item(0)->nodeValue;
 176                         if ($value != "") {
 177                                 $contact["location"] = $value;
 178                         }
 179
 180                         $contact['name-date'] = DateTimeFormat::utcNow();
 181
 182                         dba::update('contact', $contact, ['id' => $contact["id"]], $current);
 183
 184                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 185                                 logger("Update profile picture for contact ".$contact["id"], LOGGER_DEBUG);
 186                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
 187                         }
 188
 189                         // Ensure that we are having this contact (with uid=0)
 190                         $cid = Contact::getIdForURL($aliaslink, 0);
 191
 192                         if ($cid) {
 193                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 194                                 $old_contact = dba::selectFirst('contact', $fields, ['id' => $cid]);
 195
 196                                 // Update it with the current values
 197                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 198                                                 'nurl' => normalise_link($author["author-link"]),
 199                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 200                                                 'about' => $contact["about"], 'location' => $contact["location"],
 201                                                 'success_update' => DateTimeFormat::utcNow(), 'last-update' => DateTimeFormat::utcNow()];
 202
 203                                 dba::update('contact', $fields, ['id' => $cid], $old_contact);
 204
 205                                 // Update the avatar
 206                                 Contact::updateAvatar($author["author-avatar"], 0, $cid);
 207                         }
 208
 209                         $contact["generation"] = 2;
 210                         $contact["hide"] = false; // OStatus contacts are never hidden
 211                         $contact["photo"] = $author["author-avatar"];
 212                         $gcid = GContact::update($contact);
 213
 214                         GContact::link($gcid, $contact["uid"], $contact["id"]);
 215                 }
 216
 217                 return $author;
 218         }
 219
 220         /**
 221          * @brief Fetches author data from a given XML string
 222          *
 223          * @param string $xml      The XML
 224          * @param array  $importer user record of the importing user
 225          *
 226          * @return array Array of author related entries for the item
 227          */
 228         public static function salmonAuthor($xml, $importer)
 229         {
 230                 if ($xml == "") {
 231                         return;
 232                 }
 233
 234                 $doc = new DOMDocument();
 235                 @$doc->loadXML($xml);
 236
 237                 $xpath = new DOMXPath($doc);
 238                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 239                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 240                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 241                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 242                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 243                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 244                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 245                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 246
 247                 $entries = $xpath->query('/atom:entry');
 248
 249                 foreach ($entries as $entry) {
 250                         // fetch the author
 251                         $author = self::fetchAuthor($xpath, $entry, $importer, $contact, true);
 252                         return $author;
 253                 }
 254         }
 255
 256         /**
 257          * @brief Read attributes from element
 258          *
 259          * @param object $element Element object
 260          *
 261          * @return array attributes
 262          */
 263         private static function readAttributes($element)
 264         {
 265                 $attribute = [];
 266
 267                 foreach ($element->attributes as $attributes) {
 268                         $attribute[$attributes->name] = $attributes->textContent;
 269                 }
 270
 271                 return $attribute;
 272         }
 273
 274         /**
 275          * @brief Imports an XML string containing OStatus elements
 276          *
 277          * @param string $xml      The XML
 278          * @param array  $importer user record of the importing user
 279          * @param array  $contact  contact
 280          * @param string $hub      Called by reference, returns the fetched hub data
 281          * @return void
 282          */
 283         public static function import($xml, $importer, &$contact, &$hub)
 284         {
 285                 self::process($xml, $importer, $contact, $hub);
 286         }
 287
 288         /**
 289          * @brief Internal feed processing
 290          *
 291          * @param string  $xml        The XML
 292          * @param array   $importer   user record of the importing user
 293          * @param array   $contact    contact
 294          * @param string  $hub        Called by reference, returns the fetched hub data
 295          * @param boolean $stored     Is the post fresh imported or from the database?
 296          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 297          *
 298          * @return boolean Could the XML be processed?
 299          */
 300         private static function process($xml, $importer, &$contact, &$hub, $stored = false, $initialize = true)
 301         {
 302                 if ($initialize) {
 303                         self::$itemlist = [];
 304                         self::$conv_list = [];
 305                 }
 306
 307                 logger("Import OStatus message", LOGGER_DEBUG);
 308
 309                 if ($xml == "") {
 310                         return false;
 311                 }
 312                 $doc = new DOMDocument();
 313                 @$doc->loadXML($xml);
 314
 315                 $xpath = new DOMXPath($doc);
 316                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 317                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 318                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 319                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 320                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 321                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 322                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 323                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 324
 325                 $hub = "";
 326                 $hub_attributes = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0)->attributes;
 327                 if (is_object($hub_attributes)) {
 328                         foreach ($hub_attributes as $hub_attribute) {
 329                                 if ($hub_attribute->name == "href") {
 330                                         $hub = $hub_attribute->textContent;
 331                                         logger("Found hub ".$hub, LOGGER_DEBUG);
 332                                 }
 333                         }
 334                 }
 335
 336                 $header = [];
 337                 $header["uid"] = $importer["uid"];
 338                 $header["network"] = NETWORK_OSTATUS;
 339                 $header["type"] = "remote";
 340                 $header["wall"] = 0;
 341                 $header["origin"] = 0;
 342                 $header["gravity"] = GRAVITY_PARENT;
 343
 344                 $first_child = $doc->firstChild->tagName;
 345
 346                 if ($first_child == "feed") {
 347                         $entries = $xpath->query('/atom:feed/atom:entry');
 348                 } else {
 349                         $entries = $xpath->query('/atom:entry');
 350                 }
 351
 352                 if ($entries->length == 1) {
 353                         // We reformat the XML to make it better readable
 354                         $doc2 = new DOMDocument();
 355                         $doc2->loadXML($xml);
 356                         $doc2->preserveWhiteSpace = false;
 357                         $doc2->formatOutput = true;
 358                         $xml2 = $doc2->saveXML();
 359
 360                         $header["protocol"] = PROTOCOL_OSTATUS_SALMON;
 361                         $header["source"] = $xml2;
 362                 } elseif (!$initialize) {
 363                         return false;
 364                 }
 365
 366                 // Fetch the first author
 367                 $authordata = $xpath->query('//author')->item(0);
 368                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 369
 370                 $entry = $xpath->query('/atom:entry');
 371
 372                 // Reverse the order of the entries
 373                 $entrylist = [];
 374
 375                 foreach ($entries as $entry) {
 376                         $entrylist[] = $entry;
 377                 }
 378
 379                 foreach (array_reverse($entrylist) as $entry) {
 380                         // fetch the author
 381                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 382
 383                         if ($authorelement->length == 0) {
 384                                 $authorelement = $xpath->query('atom:author', $entry);
 385                         }
 386
 387                         if ($authorelement->length > 0) {
 388                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 389                         }
 390
 391                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $entry)->item(0)->nodeValue;
 392                         if ($value != "") {
 393                                 $nickname = $value;
 394                         } else {
 395                                 $nickname = $author["author-name"];
 396                         }
 397
 398                         $item = array_merge($header, $author);
 399
 400                         $item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
 401
 402                         $item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
 403
 404                         // Delete a message
 405                         if (in_array($item["verb"], ['qvitter-delete-notice', ACTIVITY_DELETE, 'delete'])) {
 406                                 self::deleteNotice($item);
 407                                 continue;
 408                         }
 409
 410                         if (in_array($item["verb"], [NAMESPACE_OSTATUS."/unfavorite", ACTIVITY_UNFAVORITE])) {
 411                                 // Ignore "Unfavorite" message
 412                                 logger("Ignore unfavorite message ".print_r($item, true), LOGGER_DEBUG);
 413                                 continue;
 414                         }
 415
 416                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 417                         if (dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 418                                 logger('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 419                                 continue;
 420                         } else {
 421                                 logger('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 422                         }
 423
 424                         if ($item["verb"] == ACTIVITY_JOIN) {
 425                                 // ignore "Join" messages
 426                                 logger("Ignore join message ".print_r($item, true), LOGGER_DEBUG);
 427                                 continue;
 428                         }
 429
 430                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 431                                 // ignore mastodon "block" messages
 432                                 logger("Ignore block message ".print_r($item, true), LOGGER_DEBUG);
 433                                 continue;
 434                         }
 435
 436                         if ($item["verb"] == ACTIVITY_FOLLOW) {
 437                                 Contact::addRelationship($importer, $contact, $item, $nickname);
 438                                 continue;
 439                         }
 440
 441                         if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
 442                                 Contact::removeFollower($importer, $contact, $item, $dummy);
 443                                 continue;
 444                         }
 445
 446                         if ($item["verb"] == ACTIVITY_FAVORITE) {
 447                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 448                                 logger("Favorite ".$orig_uri." ".print_r($item, true));
 449
 450                                 $item["verb"] = ACTIVITY_LIKE;
 451                                 $item["parent-uri"] = $orig_uri;
 452                                 $item["gravity"] = GRAVITY_LIKE;
 453                         }
 454
 455                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 456                         if (!in_array($item["verb"], [ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE])) {
 457                                 logger("Unhandled verb ".$item["verb"]." ".print_r($item, true), LOGGER_DEBUG);
 458                         }
 459
 460                         self::processPost($xpath, $entry, $item, $importer);
 461
 462                         if ($initialize && (count(self::$itemlist) > 0)) {
 463                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 464                                         // We will import it everytime, when it is started by our contacts
 465                                         $valid = !empty(self::$itemlist[0]['contact-id']);
 466                                         if (!$valid) {
 467                                                 // If not, then it depends on this setting
 468                                                 $valid = !Config::get('system', 'ostatus_full_threads');
 469                                         }
 470                                         if ($valid) {
 471                                                 // Never post a thread when the only interaction by our contact was a like
 472                                                 $valid = false;
 473                                                 $verbs = [ACTIVITY_POST, ACTIVITY_SHARE];
 474                                                 foreach (self::$itemlist as $item) {
 475                                                         if (!empty($item['contact-id']) && in_array($item['verb'], $verbs)) {
 476                                                                 $valid = true;
 477                                                         }
 478                                                 }
 479                                         }
 480                                 } else {
 481                                         // But we will only import complete threads
 482                                         $valid = dba::exists('item', ['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 483                                 }
 484
 485                                 if ($valid) {
 486                                         $default_contact = 0;
 487                                         $key = count(self::$itemlist);
 488                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 489                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 490                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 491                                                 } else {
 492                                                         $default_contact = $item['contact-id'];
 493                                                 }
 494                                         }
 495                                         foreach (self::$itemlist as $item) {
 496                                                 $found = dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 497                                                 if ($found) {
 498                                                         logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", LOGGER_DEBUG);
 499                                                 } elseif ($item['contact-id'] < 0) {
 500                                                         logger("Item with uri ".$item["uri"]." is from a blocked contact.", LOGGER_DEBUG);
 501                                                 } else {
 502                                                         // We are having duplicated entries. Hopefully this solves it.
 503                                                         if (Lock::set('ostatus_process_item_insert')) {
 504                                                                 $ret = Item::insert($item);
 505                                                                 Lock::remove('ostatus_process_item_insert');
 506                                                                 logger("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 507                                                         } else {
 508                                                                 $ret = Item::insert($item);
 509                                                                 logger("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
 510                                                         }
 511                                                 }
 512                                         }
 513                                 }
 514                                 self::$itemlist = [];
 515                         }
 516                         logger('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 517                 }
 518                 return true;
 519         }
 520
 521         /**
 522          * @param object $item item
 523          * @return void
 524          */
 525         private static function deleteNotice($item)
 526         {
 527                 $condition = ['uid' => $item['uid'], 'author-link' => $item['author-link'], 'uri' => $item['uri']];
 528                 $deleted = dba::selectFirst('item', ['id', 'parent-uri'], $condition);
 529                 if (!DBM::is_result($deleted)) {
 530                         logger('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it. ");
 531                         return;
 532                 }
 533
 534                 Item::deleteById($deleted["id"]);
 535
 536                 logger('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 537         }
 538
 539         /**
 540          * @brief Processes the XML for a post
 541          *
 542          * @param object $xpath    The xpath object
 543          * @param object $entry    The xml entry that is processed
 544          * @param array  $item     The item array
 545          * @param array  $importer user record of the importing user
 546          * @return void
 547          */
 548         private static function processPost($xpath, $entry, &$item, $importer)
 549         {
 550                 $item["body"] = html2bbcode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
 551                 $item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
 552                 if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
 553                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 554                         $item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 555                 } elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
 556                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 557                 }
 558
 559                 $item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 560                 $item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 561                 $conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
 562                 $item['conversation-uri'] = $conversation;
 563
 564                 $conv = $xpath->query('ostatus:conversation', $entry);
 565                 if (is_object($conv->item(0))) {
 566                         foreach ($conv->item(0)->attributes as $attributes) {
 567                                 if ($attributes->name == "ref") {
 568                                         $item['conversation-uri'] = $attributes->textContent;
 569                                 }
 570                                 if ($attributes->name == "href") {
 571                                         $item['conversation-href'] = $attributes->textContent;
 572                                 }
 573                         }
 574                 }
 575
 576                 $related = "";
 577
 578                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 579                 if (is_object($inreplyto->item(0))) {
 580                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 581                                 if ($attributes->name == "ref") {
 582                                         $item["parent-uri"] = $attributes->textContent;
 583                                 }
 584                                 if ($attributes->name == "href") {
 585                                         $related = $attributes->textContent;
 586                                 }
 587                         }
 588                 }
 589
 590                 $georsspoint = $xpath->query('georss:point', $entry);
 591                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 592                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 593                 }
 594
 595                 $categories = $xpath->query('atom:category', $entry);
 596                 if ($categories) {
 597                         foreach ($categories as $category) {
 598                                 foreach ($category->attributes as $attributes) {
 599                                         if ($attributes->name == "term") {
 600                                                 $term = $attributes->textContent;
 601                                                 if (strlen($item["tag"])) {
 602                                                         $item["tag"] .= ',';
 603                                                 }
 604                                                 $item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
 605                                         }
 606                                 }
 607                         }
 608                 }
 609
 610                 $self = '';
 611                 $add_body = '';
 612
 613                 $links = $xpath->query('atom:link', $entry);
 614                 if ($links) {
 615                         $link_data = self::processLinks($links, $item);
 616                         $self = $link_data['self'];
 617                         $add_body = $link_data['add_body'];
 618                 }
 619
 620                 $repeat_of = "";
 621
 622                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 623                 if ($notice_info && ($notice_info->length > 0)) {
 624                         foreach ($notice_info->item(0)->attributes as $attributes) {
 625                                 if ($attributes->name == "source") {
 626                                         $item["app"] = strip_tags($attributes->textContent);
 627                                 }
 628                                 if ($attributes->name == "repeat_of") {
 629                                         $repeat_of = $attributes->textContent;
 630                                 }
 631                         }
 632                 }
 633                 // Is it a repeated post?
 634                 if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
 635                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 636                         if (!empty($link_data['add_body'])) {
 637                                 $add_body .= $link_data['add_body'];
 638                         }
 639                 }
 640
 641                 $item["body"] .= $add_body;
 642
 643                 // Only add additional data when there is no picture in the post
 644                 if (!strstr($item["body"], '[/img]')) {
 645                         $item["body"] = add_page_info_to_body($item["body"]);
 646                 }
 647
 648                 // Mastodon Content Warning
 649                 if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 650                         $clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 651
 652                         $item["body"] = html2bbcode($clear_text) . '[spoiler]' . $item["body"] . '[/spoiler]';
 653                 }
 654
 655                 if (($self != '') && empty($item['protocol'])) {
 656                         self::fetchSelf($self, $item);
 657                 }
 658
 659                 if (!empty($item["conversation-href"])) {
 660                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 661                 }
 662
 663                 if (isset($item["parent-uri"]) && ($related != '')) {
 664                         if (!dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 665                                 self::fetchRelated($related, $item["parent-uri"], $importer);
 666                         } else {
 667                                 logger('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 668                         }
 669
 670                         $item["type"] = 'remote-comment';
 671                         $item["gravity"] = GRAVITY_COMMENT;
 672                 } else {
 673                         $item["parent-uri"] = $item["uri"];
 674                 }
 675
 676                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 677                         $item = Conversation::insert($item);
 678                 }
 679
 680                 self::$itemlist[] = $item;
 681         }
 682
 683         /**
 684          * @brief Fetch the conversation for posts
 685          *
 686          * @param string $conversation     The link to the conversation
 687          * @param string $conversation_uri The conversation in "uri" format
 688          * @return void
 689          */
 690         private static function fetchConversation($conversation, $conversation_uri)
 691         {
 692                 // Ensure that we only store a conversation once in a process
 693                 if (isset(self::$conv_list[$conversation])) {
 694                         return;
 695                 }
 696
 697                 self::$conv_list[$conversation] = true;
 698
 699                 $conversation_data = Network::curl($conversation, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 700
 701                 if (!$conversation_data['success']) {
 702                         return;
 703                 }
 704
 705                 $xml = '';
 706
 707                 if (stristr($conversation_data['header'], 'Content-Type: application/atom+xml')) {
 708                         $xml = $conversation_data['body'];
 709                 }
 710
 711                 if ($xml == '') {
 712                         $doc = new DOMDocument();
 713                         if (!@$doc->loadHTML($conversation_data['body'])) {
 714                                 return;
 715                         }
 716                         $xpath = new DOMXPath($doc);
 717
 718                         $links = $xpath->query('//link');
 719                         if ($links) {
 720                                 $file = '';
 721                                 foreach ($links as $link) {
 722                                         $attribute = self::readAttributes($link);
 723                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 724                                                 $file = $attribute['href'];
 725                                         }
 726                                 }
 727                                 if ($file != '') {
 728                                         $conversation_atom = Network::curl($attribute['href']);
 729
 730                                         if ($conversation_atom['success']) {
 731                                                 $xml = $conversation_atom['body'];
 732                                         }
 733                                 }
 734                         }
 735                 }
 736
 737                 if ($xml == '') {
 738                         return;
 739                 }
 740
 741                 self::storeConversation($xml, $conversation, $conversation_uri);
 742         }
 743
 744         /**
 745          * @brief Store a feed in several conversation entries
 746          *
 747          * @param string $xml              The feed
 748          * @param string $conversation     conversation
 749          * @param string $conversation_uri conversation uri
 750          * @return void
 751          */
 752         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 753         {
 754                 $doc = new DOMDocument();
 755                 @$doc->loadXML($xml);
 756
 757                 $xpath = new DOMXPath($doc);
 758                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 759                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 760                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 761
 762                 $entries = $xpath->query('/atom:feed/atom:entry');
 763
 764                 // Now store the entries
 765                 foreach ($entries as $entry) {
 766                         $doc2 = new DOMDocument();
 767                         $doc2->preserveWhiteSpace = false;
 768                         $doc2->formatOutput = true;
 769
 770                         $conv_data = [];
 771
 772                         $conv_data['protocol'] = PROTOCOL_SPLITTED_CONV;
 773                         $conv_data['network'] = NETWORK_OSTATUS;
 774                         $conv_data['uri'] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
 775
 776                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 777                         if (is_object($inreplyto->item(0))) {
 778                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 779                                         if ($attributes->name == "ref") {
 780                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 781                                         }
 782                                 }
 783                         }
 784
 785                         $conv = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
 786                         $conv_data['conversation-uri'] = $conv;
 787
 788                         $conv = $xpath->query('ostatus:conversation', $entry);
 789                         if (is_object($conv->item(0))) {
 790                                 foreach ($conv->item(0)->attributes as $attributes) {
 791                                         if ($attributes->name == "ref") {
 792                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 793                                         }
 794                                         if ($attributes->name == "href") {
 795                                                 $conv_data['conversation-href'] = $attributes->textContent;
 796                                         }
 797                                 }
 798                         }
 799
 800                         if ($conversation != '') {
 801                                 $conv_data['conversation-uri'] = $conversation;
 802                         }
 803
 804                         if ($conversation_uri != '') {
 805                                 $conv_data['conversation-uri'] = $conversation_uri;
 806                         }
 807
 808                         $entry = $doc2->importNode($entry, true);
 809
 810                         $doc2->appendChild($entry);
 811
 812                         $conv_data['source'] = $doc2->saveXML();
 813
 814                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => PROTOCOL_OSTATUS_FEED];
 815                         if (dba::exists('conversation', $condition)) {
 816                                 logger('Delete deprecated entry for URI '.$conv_data['uri'], LOGGER_DEBUG);
 817                                 dba::delete('conversation', ['item-uri' => $conv_data['uri']]);
 818                         }
 819
 820                         logger('Store conversation data for uri '.$conv_data['uri'], LOGGER_DEBUG);
 821                         Conversation::insert($conv_data);
 822                 }
 823         }
 824
 825         /**
 826          * @brief Fetch the own post so that it can be stored later
 827          *
 828          * We want to store the original data for later processing.
 829          * This function is meant for cases where we process a feed with multiple entries.
 830          * In that case we need to fetch the single posts here.
 831          *
 832          * @param string $self The link to the self item
 833          * @param array  $item The item array
 834          * @return void
 835          */
 836         private static function fetchSelf($self, &$item)
 837         {
 838                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 839                 if (dba::exists('conversation', $condition)) {
 840                         logger('Conversation '.$item['uri'].' is already stored.', LOGGER_DEBUG);
 841                         return;
 842                 }
 843
 844                 $self_data = Network::curl($self);
 845
 846                 if (!$self_data['success']) {
 847                         return;
 848                 }
 849
 850                 // We reformat the XML to make it better readable
 851                 $doc = new DOMDocument();
 852                 $doc->loadXML($self_data['body']);
 853                 $doc->preserveWhiteSpace = false;
 854                 $doc->formatOutput = true;
 855                 $xml = $doc->saveXML();
 856
 857                 $item["protocol"] = PROTOCOL_OSTATUS_SALMON;
 858                 $item["source"] = $xml;
 859
 860                 logger('Conversation '.$item['uri'].' is now fetched.', LOGGER_DEBUG);
 861         }
 862
 863         /**
 864          * @brief Fetch related posts and processes them
 865          *
 866          * @param string $related     The link to the related item
 867          * @param string $related_uri The related item in "uri" format
 868          * @param array  $importer    user record of the importing user
 869          * @return void
 870          */
 871         private static function fetchRelated($related, $related_uri, $importer)
 872         {
 873                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 874                 $conversation = dba::selectFirst('conversation', ['source', 'protocol'], $condition);
 875                 if (DBM::is_result($conversation)) {
 876                         $stored = true;
 877                         $xml = $conversation['source'];
 878                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 879                                 logger('Got valid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 880                                 return;
 881                         }
 882                         if ($conversation['protocol'] == PROTOCOL_OSTATUS_SALMON) {
 883                                 logger('Delete invalid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 884                                 dba::delete('conversation', ['item-uri' => $related_uri]);
 885                         }
 886                 }
 887
 888                 $stored = false;
 889                 $related_data = Network::curl($related, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 890
 891                 if (!$related_data['success']) {
 892                         return;
 893                 }
 894
 895                 $xml = '';
 896
 897                 if (stristr($related_data['header'], 'Content-Type: application/atom+xml')) {
 898                         logger('Directly fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 899                         $xml = $related_data['body'];
 900                 }
 901
 902                 if ($xml == '') {
 903                         $doc = new DOMDocument();
 904                         if (!@$doc->loadHTML($related_data['body'])) {
 905                                 return;
 906                         }
 907                         $xpath = new DOMXPath($doc);
 908
 909                         $atom_file = '';
 910
 911                         $links = $xpath->query('//link');
 912                         if ($links) {
 913                                 foreach ($links as $link) {
 914                                         $attribute = self::readAttributes($link);
 915                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 916                                                 $atom_file = $attribute['href'];
 917                                         }
 918                                 }
 919                                 if ($atom_file != '') {
 920                                         $related_atom = Network::curl($atom_file);
 921
 922                                         if ($related_atom['success']) {
 923                                                 logger('Fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 924                                                 $xml = $related_atom['body'];
 925                                         }
 926                                 }
 927                         }
 928                 }
 929
 930                 // Workaround for older GNU Social servers
 931                 if (($xml == '') && strstr($related, '/notice/')) {
 932                         $related_atom = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
 933
 934                         if ($related_atom['success']) {
 935                                 logger('GNU Social workaround to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 936                                 $xml = $related_atom['body'];
 937                         }
 938                 }
 939
 940                 // Even more worse workaround for GNU Social ;-)
 941                 if ($xml == '') {
 942                         $related_guess = OStatus::convertHref($related_uri);
 943                         $related_atom = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
 944
 945                         if ($related_atom['success']) {
 946                                 logger('GNU Social workaround 2 to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 947                                 $xml = $related_atom['body'];
 948                         }
 949                 }
 950
 951                 // Finally we take the data that we fetched from "ostatus:conversation"
 952                 if ($xml == '') {
 953                         $condition = ['item-uri' => $related_uri, 'protocol' => PROTOCOL_SPLITTED_CONV];
 954                         $conversation = dba::selectFirst('conversation', ['source'], $condition);
 955                         if (DBM::is_result($conversation)) {
 956                                 $stored = true;
 957                                 logger('Got cached XML from conversation for URI '.$related_uri, LOGGER_DEBUG);
 958                                 $xml = $conversation['source'];
 959                         }
 960                 }
 961
 962                 if ($xml != '') {
 963                         self::process($xml, $importer, $contact, $hub, $stored, false);
 964                 } else {
 965                         logger("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, LOGGER_DEBUG);
 966                 }
 967                 return;
 968         }
 969
 970         /**
 971          * @brief Processes the XML for a repeated post
 972          *
 973          * @param object $xpath    The xpath object
 974          * @param object $entry    The xml entry that is processed
 975          * @param array  $item     The item array
 976          * @param array  $importer user record of the importing user
 977          *
 978          * @return array with data from links
 979          */
 980         private static function processRepeatedItem($xpath, $entry, &$item, $importer)
 981         {
 982                 $activityobjects = $xpath->query('activity:object', $entry)->item(0);
 983
 984                 if (!is_object($activityobjects)) {
 985                         return [];
 986                 }
 987
 988                 $link_data = [];
 989
 990                 $orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
 991
 992                 $links = $xpath->query("atom:link", $activityobjects);
 993                 if ($links) {
 994                         $link_data = self::processLinks($links, $item);
 995                 }
 996
 997                 $orig_body = $xpath->query('atom:content/text()', $activityobjects)->item(0)->nodeValue;
 998                 $orig_created = $xpath->query('atom:published/text()', $activityobjects)->item(0)->nodeValue;
 999                 $orig_edited = $xpath->query('atom:updated/text()', $activityobjects)->item(0)->nodeValue;
1000
1001                 $orig_author = self::fetchAuthor($xpath, $activityobjects, $importer, $dummy, false);
1002
1003                 $item["author-name"] = $orig_author["author-name"];
1004                 $item["author-link"] = $orig_author["author-link"];
1005                 $item["author-avatar"] = $orig_author["author-avatar"];
1006
1007                 $item["body"] = html2bbcode($orig_body);
1008                 $item["created"] = $orig_created;
1009                 $item["edited"] = $orig_edited;
1010
1011                 $item["uri"] = $orig_uri;
1012
1013                 $item["verb"] = $xpath->query('activity:verb/text()', $activityobjects)->item(0)->nodeValue;
1014
1015                 $item["object-type"] = $xpath->query('activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
1016
1017                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobjects);
1018                 if (is_object($inreplyto->item(0))) {
1019                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1020                                 if ($attributes->name == "ref") {
1021                                         $item["parent-uri"] = $attributes->textContent;
1022                                 }
1023                         }
1024                 }
1025
1026                 return $link_data;
1027         }
1028
1029         /**
1030          * @brief Processes links in the XML
1031          *
1032          * @param object $links The xml data that contain links
1033          * @param array  $item  The item array
1034          *
1035          * @return array with data from the links
1036          */
1037         private static function processLinks($links, &$item)
1038         {
1039                 $link_data = ['add_body' => '', 'self' => ''];
1040
1041                 foreach ($links as $link) {
1042                         $attribute = self::readAttributes($link);
1043
1044                         if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
1045                                 switch ($attribute['rel']) {
1046                                         case "alternate":
1047                                                 $item["plink"] = $attribute['href'];
1048                                                 if (($item["object-type"] == ACTIVITY_OBJ_QUESTION)
1049                                                         || ($item["object-type"] == ACTIVITY_OBJ_EVENT)
1050                                                 ) {
1051                                                         $item["body"] .= add_page_info($attribute['href']);
1052                                                 }
1053                                                 break;
1054                                         case "ostatus:conversation":
1055                                                 $link_data['conversation'] = $attribute['href'];
1056                                                 $item['conversation-href'] = $link_data['conversation'];
1057                                                 if (!isset($item['conversation-uri'])) {
1058                                                         $item['conversation-uri'] = $item['conversation-href'];
1059                                                 }
1060                                                 break;
1061                                         case "enclosure":
1062                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1063                                                 if ($filetype == 'image') {
1064                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1065                                                 } else {
1066                                                         if (strlen($item["attach"])) {
1067                                                                 $item["attach"] .= ',';
1068                                                         }
1069                                                         if (!isset($attribute['length'])) {
1070                                                                 $attribute['length'] = "0";
1071                                                         }
1072                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
1073                                                 }
1074                                                 break;
1075                                         case "related":
1076                                                 if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
1077                                                         if (!isset($item["parent-uri"])) {
1078                                                                 $item["parent-uri"] = $attribute['href'];
1079                                                         }
1080                                                         $link_data['related'] = $attribute['href'];
1081                                                 } else {
1082                                                         $item["body"] .= add_page_info($attribute['href']);
1083                                                 }
1084                                                 break;
1085                                         case "self":
1086                                                 if ($item["plink"] == '') {
1087                                                         $item["plink"] = $attribute['href'];
1088                                                 }
1089                                                 $link_data['self'] = $attribute['href'];
1090                                                 break;
1091                                 }
1092                         }
1093                 }
1094                 return $link_data;
1095         }
1096
1097         /**
1098          * @brief Create an url out of an uri
1099          *
1100          * @param string $href URI in the format "parameter1:parameter1:..."
1101          *
1102          * @return string URL in the format http(s)://....
1103          */
1104         public static function convertHref($href)
1105         {
1106                 $elements = explode(":", $href);
1107
1108                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1109                         return $href;
1110                 }
1111
1112                 $server = explode(",", $elements[1]);
1113                 $conversation = explode("=", $elements[2]);
1114
1115                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1116                         return "http://".$server[0]."/notice/".$elements[3];
1117                 }
1118
1119                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1120                         return $href;
1121                 }
1122                 if ($elements[3] == "objectType=thread") {
1123                         return "http://".$server[0]."/conversation/".$conversation[1];
1124                 } else {
1125                         return "http://".$server[0]."/notice/".$conversation[1];
1126                 }
1127                 return $href;
1128         }
1129
1130         /**
1131          * @brief Checks if the current post is a reshare
1132          *
1133          * @param array $item The item array of thw post
1134          *
1135          * @return string The guid if the post is a reshare
1136          */
1137         private static function getResharedGuid($item)
1138         {
1139                 $body = trim($item["body"]);
1140
1141                 // Skip if it isn't a pure repeated messages
1142                 // Does it start with a share?
1143                 if (strpos($body, "[share") > 0) {
1144                         return "";
1145                 }
1146
1147                 // Does it end with a share?
1148                 if (strlen($body) > (strrpos($body, "[/share]") + 8)) {
1149                         return "";
1150                 }
1151
1152                 $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "$1", $body);
1153                 // Skip if there is no shared message in there
1154                 if ($body == $attributes) {
1155                         return false;
1156                 }
1157
1158                 $guid = "";
1159                 preg_match("/guid='(.*?)'/ism", $attributes, $matches);
1160                 if ($matches[1] != "") {
1161                         $guid = $matches[1];
1162                 }
1163
1164                 preg_match('/guid="(.*?)"/ism', $attributes, $matches);
1165                 if ($matches[1] != "") {
1166                         $guid = $matches[1];
1167                 }
1168
1169                 return $guid;
1170         }
1171
1172         /**
1173          * @brief Cleans the body of a post if it contains picture links
1174          *
1175          * @param string $body The body
1176          *
1177          * @return string The cleaned body
1178          */
1179         private static function formatPicturePost($body)
1180         {
1181                 $siteinfo = BBCode::getAttachedData($body);
1182
1183                 if (($siteinfo["type"] == "photo")) {
1184                         if (isset($siteinfo["preview"])) {
1185                                 $preview = $siteinfo["preview"];
1186                         } else {
1187                                 $preview = $siteinfo["image"];
1188                         }
1189
1190                         // Is it a remote picture? Then make a smaller preview here
1191                         $preview = proxy_url($preview, false, PROXY_SIZE_SMALL);
1192
1193                         // Is it a local picture? Then make it smaller here
1194                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1195                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1196
1197                         if (isset($siteinfo["url"])) {
1198                                 $url = $siteinfo["url"];
1199                         } else {
1200                                 $url = $siteinfo["image"];
1201                         }
1202
1203                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1204                 }
1205
1206                 return $body;
1207         }
1208
1209         /**
1210          * @brief Adds the header elements to the XML document
1211          *
1212          * @param object $doc    XML document
1213          * @param array  $owner  Contact data of the poster
1214          * @param string $filter The related feed filter (activity, posts or comments)
1215          *
1216          * @return object header root element
1217          */
1218         private static function addHeader($doc, $owner, $filter)
1219         {
1220                 $a = get_app();
1221
1222                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
1223                 $doc->appendChild($root);
1224
1225                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1226                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1227                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1228                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1229                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
1230                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1231                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1232                 $root->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1233
1234                 $title = '';
1235                 switch ($filter) {
1236                         case 'activity': $title = L10n::t('%s\'s timeline', $owner['name']); break;
1237                         case 'posts'   : $title = L10n::t('%s\'s posts'   , $owner['name']); break;
1238                         case 'comments': $title = L10n::t('%s\'s comments', $owner['name']); break;
1239                 }
1240
1241                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1242                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1243                 XML::addElement($doc, $root, "id", System::baseUrl() . "/profile/" . $owner["nick"]);
1244                 XML::addElement($doc, $root, "title", $title);
1245                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], $a->config["sitename"]));
1246                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1247                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1248
1249                 $author = self::addAuthor($doc, $owner);
1250                 $root->appendChild($author);
1251
1252                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1253                 XML::addElement($doc, $root, "link", "", $attributes);
1254
1255                 /// @TODO We have to find out what this is
1256                 /// $attributes = array("href" => System::baseUrl()."/sup",
1257                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1258                 ///             "type" => "application/json");
1259                 /// XML::addElement($doc, $root, "link", "", $attributes);
1260
1261                 self::hublinks($doc, $root, $owner["nick"]);
1262
1263                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1264                 XML::addElement($doc, $root, "link", "", $attributes);
1265
1266                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1267                 XML::addElement($doc, $root, "link", "", $attributes);
1268
1269                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1270                 XML::addElement($doc, $root, "link", "", $attributes);
1271
1272                 $attributes = ["href" => System::baseUrl() . "/api/statuses/user_timeline/" . $owner["nick"] . ".atom",
1273                         "rel" => "self", "type" => "application/atom+xml"];
1274                 XML::addElement($doc, $root, "link", "", $attributes);
1275
1276                 return $root;
1277         }
1278
1279         /**
1280          * @brief Add the link to the push hubs to the XML document
1281          *
1282          * @param object $doc  XML document
1283          * @param object $root XML root element where the hub links are added
1284          * @param object $nick nick
1285          * @return void
1286          */
1287         public static function hublinks($doc, $root, $nick)
1288         {
1289                 $h = System::baseUrl() . '/pubsubhubbub/'.$nick;
1290                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1291         }
1292
1293         /**
1294          * @brief Adds attachement data to the XML document
1295          *
1296          * @param object $doc  XML document
1297          * @param object $root XML root element where the hub links are added
1298          * @param array  $item Data of the item that is to be posted
1299          * @return void
1300          */
1301         private static function getAttachment($doc, $root, $item)
1302         {
1303                 $o = "";
1304                 $siteinfo = BBCode::getAttachedData($item["body"]);
1305
1306                 switch ($siteinfo["type"]) {
1307                         case 'photo':
1308                                 $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1309                                 $attributes = ["rel" => "enclosure",
1310                                                 "href" => $siteinfo["image"],
1311                                                 "type" => $imgdata["mime"],
1312                                                 "length" => intval($imgdata["size"])];
1313                                 XML::addElement($doc, $root, "link", "", $attributes);
1314                                 break;
1315                         case 'video':
1316                                 $attributes = ["rel" => "enclosure",
1317                                                 "href" => $siteinfo["url"],
1318                                                 "type" => "text/html; charset=UTF-8",
1319                                                 "length" => "",
1320                                                 "title" => $siteinfo["title"]];
1321                                 XML::addElement($doc, $root, "link", "", $attributes);
1322                                 break;
1323                         default:
1324                                 break;
1325                 }
1326
1327                 if (!Config::get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1328                         $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1329                         $attributes = ["rel" => "enclosure",
1330                                         "href" => $siteinfo["image"],
1331                                         "type" => $imgdata["mime"],
1332                                         "length" => intval($imgdata["size"])];
1333
1334                         XML::addElement($doc, $root, "link", "", $attributes);
1335                 }
1336
1337                 $arr = explode('[/attach],', $item['attach']);
1338                 if (count($arr)) {
1339                         foreach ($arr as $r) {
1340                                 $matches = false;
1341                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1342                                 if ($cnt) {
1343                                         $attributes = ["rel" => "enclosure",
1344                                                         "href" => $matches[1],
1345                                                         "type" => $matches[3]];
1346
1347                                         if (intval($matches[2])) {
1348                                                 $attributes["length"] = intval($matches[2]);
1349                                         }
1350                                         if (trim($matches[4]) != "") {
1351                                                 $attributes["title"] = trim($matches[4]);
1352                                         }
1353                                         XML::addElement($doc, $root, "link", "", $attributes);
1354                                 }
1355                         }
1356                 }
1357         }
1358
1359         /**
1360          * @brief Adds the author element to the XML document
1361          *
1362          * @param object $doc   XML document
1363          * @param array  $owner Contact data of the poster
1364          *
1365          * @return object author element
1366          */
1367         private static function addAuthor($doc, $owner)
1368         {
1369                 $profile = dba::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid'], 'is-default' => true]);
1370                 $author = $doc->createElement("author");
1371                 XML::addElement($doc, $author, "id", $owner["url"]);
1372                 XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_PERSON);
1373                 XML::addElement($doc, $author, "uri", $owner["url"]);
1374                 XML::addElement($doc, $author, "name", $owner["nick"]);
1375                 XML::addElement($doc, $author, "email", $owner["addr"]);
1376                 XML::addElement($doc, $author, "summary", bbcode($owner["about"], false, false, 7));
1377
1378                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1379                 XML::addElement($doc, $author, "link", "", $attributes);
1380
1381                 $attributes = [
1382                                 "rel" => "avatar",
1383                                 "type" => "image/jpeg", // To-Do?
1384                                 "media:width" => 175,
1385                                 "media:height" => 175,
1386                                 "href" => $owner["photo"]];
1387                 XML::addElement($doc, $author, "link", "", $attributes);
1388
1389                 if (isset($owner["thumb"])) {
1390                         $attributes = [
1391                                         "rel" => "avatar",
1392                                         "type" => "image/jpeg", // To-Do?
1393                                         "media:width" => 80,
1394                                         "media:height" => 80,
1395                                         "href" => $owner["thumb"]];
1396                         XML::addElement($doc, $author, "link", "", $attributes);
1397                 }
1398
1399                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1400                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1401                 XML::addElement($doc, $author, "poco:note", bbcode($owner["about"], false, false, 7));
1402
1403                 if (trim($owner["location"]) != "") {
1404                         $element = $doc->createElement("poco:address");
1405                         XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1406                         $author->appendChild($element);
1407                 }
1408
1409                 if (DBM::is_result($profile)) {
1410                         if (trim($profile["homepage"]) != "") {
1411                                 $urls = $doc->createElement("poco:urls");
1412                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1413                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1414                                 XML::addElement($doc, $urls, "poco:primary", "true");
1415                                 $author->appendChild($urls);
1416                         }
1417
1418                         XML::addElement($doc, $author, "followers", "", ["url" => System::baseUrl()."/viewcontacts/".$owner["nick"]]);
1419                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1420                 }
1421
1422                 if ($profile["publish"]) {
1423                         XML::addElement($doc, $author, "mastodon:scope", "public");
1424                 }
1425                 return $author;
1426         }
1427
1428         /**
1429          * @TODO Picture attachments should look like this:
1430          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1431          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1432          */
1433
1434         /**
1435          * @brief Returns the given activity if present - otherwise returns the "post" activity
1436          *
1437          * @param array $item Data of the item that is to be posted
1438          *
1439          * @return string activity
1440          */
1441         private static function constructVerb($item)
1442         {
1443                 if ($item['verb']) {
1444                         return $item['verb'];
1445                 }
1446
1447                 return ACTIVITY_POST;
1448         }
1449
1450         /**
1451          * @brief Returns the given object type if present - otherwise returns the "note" object type
1452          *
1453          * @param array $item Data of the item that is to be posted
1454          *
1455          * @return string Object type
1456          */
1457         private static function constructObjecttype($item)
1458         {
1459                 if (in_array($item['object-type'], [ACTIVITY_OBJ_NOTE, ACTIVITY_OBJ_COMMENT]))
1460                         return $item['object-type'];
1461                 return ACTIVITY_OBJ_NOTE;
1462         }
1463
1464         /**
1465          * @brief Adds an entry element to the XML document
1466          *
1467          * @param object $doc      XML document
1468          * @param array  $item     Data of the item that is to be posted
1469          * @param array  $owner    Contact data of the poster
1470          * @param bool   $toplevel optional default false
1471          *
1472          * @return object Entry element
1473          */
1474         private static function entry($doc, $item, $owner, $toplevel = false)
1475         {
1476                 $xml = null;
1477
1478                 $repeated_guid = self::getResharedGuid($item);
1479                 if ($repeated_guid != "") {
1480                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1481                 }
1482
1483                 if ($xml) {
1484                         return $xml;
1485                 }
1486
1487                 if ($item["verb"] == ACTIVITY_LIKE) {
1488                         return self::likeEntry($doc, $item, $owner, $toplevel);
1489                 } elseif (in_array($item["verb"], [ACTIVITY_FOLLOW, NAMESPACE_OSTATUS."/unfollow"])) {
1490                         return self::followEntry($doc, $item, $owner, $toplevel);
1491                 } else {
1492                         return self::noteEntry($doc, $item, $owner, $toplevel);
1493                 }
1494         }
1495
1496         /**
1497          * @brief Adds a source entry to the XML document
1498          *
1499          * @param object $doc     XML document
1500          * @param array  $contact Array of the contact that is added
1501          *
1502          * @return object Source element
1503          */
1504         private static function sourceEntry($doc, $contact)
1505         {
1506                 $source = $doc->createElement("source");
1507                 XML::addElement($doc, $source, "id", $contact["poll"]);
1508                 XML::addElement($doc, $source, "title", $contact["name"]);
1509                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1510                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1511                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1512                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1513
1514                 return $source;
1515         }
1516
1517         /**
1518          * @brief Fetches contact data from the contact or the gcontact table
1519          *
1520          * @param string $url   URL of the contact
1521          * @param array  $owner Contact data of the poster
1522          *
1523          * @return array Contact array
1524          */
1525         private static function contactEntry($url, $owner)
1526         {
1527                 $r = q(
1528                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1529                         dbesc(normalise_link($url)),
1530                         intval($owner["uid"])
1531                 );
1532                 if (DBM::is_result($r)) {
1533                         $contact = $r[0];
1534                         $contact["uid"] = -1;
1535                 }
1536
1537                 if (!DBM::is_result($r)) {
1538                         $r = q(
1539                                 "SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
1540                                 dbesc(normalise_link($url))
1541                         );
1542                         if (DBM::is_result($r)) {
1543                                 $contact = $r[0];
1544                                 $contact["uid"] = -1;
1545                                 $contact["success_update"] = $contact["updated"];
1546                         }
1547                 }
1548
1549                 if (!DBM::is_result($r)) {
1550                         $contact = owner;
1551                 }
1552
1553                 if (!isset($contact["poll"])) {
1554                         $data = Probe::uri($url);
1555                         $contact["poll"] = $data["poll"];
1556
1557                         if (!$contact["alias"]) {
1558                                 $contact["alias"] = $data["alias"];
1559                         }
1560                 }
1561
1562                 if (!isset($contact["alias"])) {
1563                         $contact["alias"] = $contact["url"];
1564                 }
1565
1566                 return $contact;
1567         }
1568
1569         /**
1570          * @brief Adds an entry element with reshared content
1571          *
1572          * @param object $doc           XML document
1573          * @param array  $item          Data of the item that is to be posted
1574          * @param array  $owner         Contact data of the poster
1575          * @param string $repeated_guid guid
1576          * @param bool   $toplevel      Is it for en entry element (false) or a feed entry (true)?
1577          *
1578          * @return object Entry element
1579          */
1580         private static function reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel)
1581         {
1582                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1583                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1584                 }
1585
1586                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1587
1588                 $r = q(
1589                         "SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' AND NOT `private` AND `network` IN ('%s', '%s', '%s') LIMIT 1",
1590                         intval($owner["uid"]),
1591                         dbesc($repeated_guid),
1592                         dbesc(NETWORK_DFRN),
1593                         dbesc(NETWORK_DIASPORA),
1594                         dbesc(NETWORK_OSTATUS)
1595                 );
1596                 if (DBM::is_result($r)) {
1597                         $repeated_item = $r[0];
1598                 } else {
1599                         return false;
1600                 }
1601                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1602
1603                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1604
1605                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1606
1607                 self::entryContent($doc, $entry, $item, $owner, $title, ACTIVITY_SHARE, false);
1608
1609                 $as_object = $doc->createElement("activity:object");
1610
1611                 XML::addElement($doc, $as_object, "activity:object-type", NAMESPACE_ACTIVITY_SCHEMA."activity");
1612
1613                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1614
1615                 $author = self::addAuthor($doc, $contact);
1616                 $as_object->appendChild($author);
1617
1618                 $as_object2 = $doc->createElement("activity:object");
1619
1620                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1621
1622                 $title = sprintf("New comment by %s", $contact["nick"]);
1623
1624                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1625
1626                 $as_object->appendChild($as_object2);
1627
1628                 self::entryFooter($doc, $as_object, $item, $owner, false);
1629
1630                 $source = self::sourceEntry($doc, $contact);
1631
1632                 $as_object->appendChild($source);
1633
1634                 $entry->appendChild($as_object);
1635
1636                 self::entryFooter($doc, $entry, $item, $owner);
1637
1638                 return $entry;
1639         }
1640
1641         /**
1642          * @brief Adds an entry element with a "like"
1643          *
1644          * @param object $doc      XML document
1645          * @param array  $item     Data of the item that is to be posted
1646          * @param array  $owner    Contact data of the poster
1647          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1648          *
1649          * @return object Entry element with "like"
1650          */
1651         private static function likeEntry($doc, $item, $owner, $toplevel)
1652         {
1653                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1654                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1655                 }
1656
1657                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1658
1659                 $verb = NAMESPACE_ACTIVITY_SCHEMA."favorite";
1660                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1661
1662                 $as_object = $doc->createElement("activity:object");
1663
1664                 $parent = q(
1665                         "SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
1666                         dbesc($item["thr-parent"]),
1667                         intval($item["uid"])
1668                 );
1669                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1670
1671                 XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent[0]));
1672
1673                 self::entryContent($doc, $as_object, $parent[0], $owner, "New entry");
1674
1675                 $entry->appendChild($as_object);
1676
1677                 self::entryFooter($doc, $entry, $item, $owner);
1678
1679                 return $entry;
1680         }
1681
1682         /**
1683          * @brief Adds the person object element to the XML document
1684          *
1685          * @param object $doc     XML document
1686          * @param array  $owner   Contact data of the poster
1687          * @param array  $contact Contact data of the target
1688          *
1689          * @return object author element
1690          */
1691         private static function addPersonObject($doc, $owner, $contact)
1692         {
1693                 $object = $doc->createElement("activity:object");
1694                 XML::addElement($doc, $object, "activity:object-type", ACTIVITY_OBJ_PERSON);
1695
1696                 if ($contact['network'] == NETWORK_PHANTOM) {
1697                         XML::addElement($doc, $object, "id", $contact['url']);
1698                         return $object;
1699                 }
1700
1701                 XML::addElement($doc, $object, "id", $contact["alias"]);
1702                 XML::addElement($doc, $object, "title", $contact["nick"]);
1703
1704                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1705                 XML::addElement($doc, $object, "link", "", $attributes);
1706
1707                 $attributes = [
1708                                 "rel" => "avatar",
1709                                 "type" => "image/jpeg", // To-Do?
1710                                 "media:width" => 175,
1711                                 "media:height" => 175,
1712                                 "href" => $contact["photo"]];
1713                 XML::addElement($doc, $object, "link", "", $attributes);
1714
1715                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1716                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1717
1718                 if (trim($contact["location"]) != "") {
1719                         $element = $doc->createElement("poco:address");
1720                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1721                         $object->appendChild($element);
1722                 }
1723
1724                 return $object;
1725         }
1726
1727         /**
1728          * @brief Adds a follow/unfollow entry element
1729          *
1730          * @param object $doc      XML document
1731          * @param array  $item     Data of the follow/unfollow message
1732          * @param array  $owner    Contact data of the poster
1733          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1734          *
1735          * @return object Entry element
1736          */
1737         private static function followEntry($doc, $item, $owner, $toplevel)
1738         {
1739                 $item["id"] = $item["parent"] = 0;
1740                 $item["created"] = $item["edited"] = date("c");
1741                 $item["private"] = true;
1742
1743                 $contact = Probe::uri($item['follow']);
1744
1745                 if ($contact['alias'] == '') {
1746                         $contact['alias'] = $contact["url"];
1747                 } else {
1748                         $item['follow'] = $contact['alias'];
1749                 }
1750
1751                 $r = q(
1752                         "SELECT `id` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1753                         intval($owner['uid']),
1754                         dbesc(normalise_link($contact["url"]))
1755                 );
1756
1757                 if (DBM::is_result($r)) {
1758                         $connect_id = $r[0]['id'];
1759                 } else {
1760                         $connect_id = 0;
1761                 }
1762
1763                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1764                         $message = L10n::t('%s is now following %s.');
1765                         $title = L10n::t('following');
1766                         $action = "subscription";
1767                 } else {
1768                         $message = L10n::t('%s stopped following %s.');
1769                         $title = L10n::t('stopped following');
1770                         $action = "unfollow";
1771                 }
1772
1773                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1774                                 = 'tag:'.get_app()->get_hostname().
1775                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1776                                 ':person:'.$connect_id.':'.$item['created'];
1777
1778                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1779
1780                 self::entryHeader($doc, $entry, $owner, $toplevel);
1781
1782                 self::entryContent($doc, $entry, $item, $owner, $title);
1783
1784                 $object = self::addPersonObject($doc, $owner, $contact);
1785                 $entry->appendChild($object);
1786
1787                 self::entryFooter($doc, $entry, $item, $owner);
1788
1789                 return $entry;
1790         }
1791
1792         /**
1793          * @brief Adds a regular entry element
1794          *
1795          * @param object $doc      XML document
1796          * @param array  $item     Data of the item that is to be posted
1797          * @param array  $owner    Contact data of the poster
1798          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1799          *
1800          * @return object Entry element
1801          */
1802         private static function noteEntry($doc, $item, $owner, $toplevel)
1803         {
1804                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1805                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1806                 }
1807
1808                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1809
1810                 XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1811
1812                 self::entryContent($doc, $entry, $item, $owner, $title);
1813
1814                 self::entryFooter($doc, $entry, $item, $owner);
1815
1816                 return $entry;
1817         }
1818
1819         /**
1820          * @brief Adds a header element to the XML document
1821          *
1822          * @param object $doc      XML document
1823          * @param object $entry    The entry element where the elements are added
1824          * @param array  $owner    Contact data of the poster
1825          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1826          *
1827          * @return string The title for the element
1828          */
1829         private static function entryHeader($doc, &$entry, $owner, $toplevel)
1830         {
1831                 /// @todo Check if this title stuff is really needed (I guess not)
1832                 if (!$toplevel) {
1833                         $entry = $doc->createElement("entry");
1834                         $title = sprintf("New note by %s", $owner["nick"]);
1835                 } else {
1836                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, "entry");
1837
1838                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1839                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1840                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1841                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1842                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
1843                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1844                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1845                         $entry->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1846
1847                         $author = self::addAuthor($doc, $owner);
1848                         $entry->appendChild($author);
1849
1850                         $title = sprintf("New comment by %s", $owner["nick"]);
1851                 }
1852                 return $title;
1853         }
1854
1855         /**
1856          * @brief Adds elements to the XML document
1857          *
1858          * @param object $doc      XML document
1859          * @param object $entry    Entry element where the content is added
1860          * @param array  $item     Data of the item that is to be posted
1861          * @param array  $owner    Contact data of the poster
1862          * @param string $title    Title for the post
1863          * @param string $verb     The activity verb
1864          * @param bool   $complete Add the "status_net" element?
1865          * @return void
1866          */
1867         private static function entryContent($doc, $entry, $item, $owner, $title, $verb = "", $complete = true)
1868         {
1869                 if ($verb == "") {
1870                         $verb = self::constructVerb($item);
1871                 }
1872
1873                 XML::addElement($doc, $entry, "id", $item["uri"]);
1874                 XML::addElement($doc, $entry, "title", $title);
1875
1876                 $body = self::formatPicturePost($item['body']);
1877
1878                 if ($item['title'] != "") {
1879                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1880                 }
1881
1882                 $body = bbcode($body, false, false, 7);
1883
1884                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1885
1886                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1887                                                                 "href" => System::baseUrl()."/display/".$item["guid"]]
1888                 );
1889
1890                 if ($complete && ($item["id"] > 0)) {
1891                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1892                 }
1893
1894                 XML::addElement($doc, $entry, "activity:verb", $verb);
1895
1896                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1897                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1898         }
1899
1900         /**
1901          * @brief Adds the elements at the foot of an entry to the XML document
1902          *
1903          * @param object $doc      XML document
1904          * @param object $entry    The entry element where the elements are added
1905          * @param array  $item     Data of the item that is to be posted
1906          * @param array  $owner    Contact data of the poster
1907          * @param bool   $complete default true
1908          * @return void
1909          */
1910         private static function entryFooter($doc, $entry, $item, $owner, $complete = true)
1911         {
1912                 $mentioned = [];
1913
1914                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
1915                         $parent = q("SELECT `guid`, `author-link`, `owner-link` FROM `item` WHERE `id` = %d", intval($item["parent"]));
1916                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1917
1918                         $thrparent = q(
1919                                 "SELECT `guid`, `author-link`, `owner-link`, `plink` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
1920                                 intval($owner["uid"]),
1921                                 dbesc($parent_item)
1922                         );
1923                         if ($thrparent) {
1924                                 $mentioned[$thrparent[0]["author-link"]] = $thrparent[0]["author-link"];
1925                                 $mentioned[$thrparent[0]["owner-link"]] = $thrparent[0]["owner-link"];
1926                                 $parent_plink = $thrparent[0]["plink"];
1927                         } else {
1928                                 $mentioned[$parent[0]["author-link"]] = $parent[0]["author-link"];
1929                                 $mentioned[$parent[0]["owner-link"]] = $parent[0]["owner-link"];
1930                                 $parent_plink = System::baseUrl()."/display/".$parent[0]["guid"];
1931                         }
1932
1933                         $attributes = [
1934                                         "ref" => $parent_item,
1935                                         "href" => $parent_plink];
1936                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1937
1938                         $attributes = [
1939                                         "rel" => "related",
1940                                         "href" => $parent_plink];
1941                         XML::addElement($doc, $entry, "link", "", $attributes);
1942                 }
1943
1944                 if (intval($item["parent"]) > 0) {
1945                         $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
1946                         $conversation_uri = $conversation_href;
1947
1948                         if (isset($parent_item)) {
1949                                 $r = dba::fetch_first("SELECT `conversation-uri`, `conversation-href` FROM `conversation` WHERE `item-uri` = ?", $parent_item);
1950                                 if (DBM::is_result($r)) {
1951                                         if ($r['conversation-uri'] != '') {
1952                                                 $conversation_uri = $r['conversation-uri'];
1953                                         }
1954                                         if ($r['conversation-href'] != '') {
1955                                                 $conversation_href = $r['conversation-href'];
1956                                         }
1957                                 }
1958                         }
1959
1960                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
1961
1962                         $attributes = [
1963                                         "href" => $conversation_href,
1964                                         "local_id" => $item["parent"],
1965                                         "ref" => $conversation_uri];
1966
1967                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1968                 }
1969
1970                 $tags = item::getFeedTags($item);
1971
1972                 if (count($tags)) {
1973                         foreach ($tags as $t) {
1974                                 if ($t[0] == "@") {
1975                                         $mentioned[$t[1]] = $t[1];
1976                                 }
1977                         }
1978                 }
1979
1980                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
1981                 $newmentions = [];
1982                 foreach ($mentioned as $mention) {
1983                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
1984                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
1985                 }
1986                 $mentioned = $newmentions;
1987
1988                 foreach ($mentioned as $mention) {
1989                         $r = q(
1990                                 "SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1991                                 intval($owner["uid"]),
1992                                 dbesc(normalise_link($mention))
1993                         );
1994                         if ($r[0]["forum"] || $r[0]["prv"]) {
1995                                 XML::addElement($doc, $entry, "link", "",
1996                                         [
1997                                                 "rel" => "mentioned",
1998                                                 "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
1999                                                 "href" => $mention]
2000                                 );
2001                         } else {
2002                                 XML::addElement($doc, $entry, "link", "",
2003                                         [
2004                                                 "rel" => "mentioned",
2005                                                 "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
2006                                                 "href" => $mention]
2007                                 );
2008                         }
2009                 }
2010
2011                 if (!$item["private"]) {
2012                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2013                                                                         "href" => "http://activityschema.org/collection/public"]);
2014                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2015                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2016                                                                         "href" => "http://activityschema.org/collection/public"]);
2017                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2018                 }
2019
2020                 if (count($tags)) {
2021                         foreach ($tags as $t) {
2022                                 if ($t[0] != "@") {
2023                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2024                                 }
2025                         }
2026                 }
2027
2028                 self::getAttachment($doc, $entry, $item);
2029
2030                 if ($complete && ($item["id"] > 0)) {
2031                         $app = $item["app"];
2032                         if ($app == "") {
2033                                 $app = "web";
2034                         }
2035
2036                         $attributes = ["local_id" => $item["id"], "source" => $app];
2037
2038                         if (isset($parent["id"])) {
2039                                 $attributes["repeat_of"] = $parent["id"];
2040                         }
2041
2042                         if ($item["coord"] != "") {
2043                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2044                         }
2045
2046                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2047                 }
2048         }
2049
2050         /**
2051          * Creates the XML feed for a given nickname
2052          *
2053          * Supported filters:
2054          * - activity (default): all the public posts
2055          * - posts: all the public top-level posts
2056          * - comments: all the public replies
2057          *
2058          * Updates the provided last_update parameter if the result comes from the
2059          * cache or it is empty
2060          *
2061          * @brief Creates the XML feed for a given nickname
2062          *
2063          * @param string  $owner_nick  Nickname of the feed owner
2064          * @param string  $last_update Date of the last update
2065          * @param integer $max_items   Number of maximum items to fetch
2066          * @param string  $filter      Feed items filter (activity, posts or comments)
2067          * @param boolean $nocache     Wether to bypass caching
2068          *
2069          * @return string XML feed
2070          */
2071         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2072         {
2073                 $stamp = microtime(true);
2074
2075                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2076
2077                 $previous_created = $last_update;
2078
2079                 $result = Cache::get($cachekey);
2080                 if (!$nocache && !is_null($result)) {
2081                         logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', LOGGER_DEBUG);
2082                         $last_update = $result['last_update'];
2083                         return $result['feed'];
2084                 }
2085
2086                 $owner = dba::fetch_first(
2087                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
2088                                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
2089                                 WHERE `contact`.`self` AND `user`.`nickname` = ? LIMIT 1",
2090                         $owner_nick
2091                 );
2092                 if (!DBM::is_result($owner)) {
2093                         return;
2094                 }
2095
2096                 if (!strlen($last_update)) {
2097                         $last_update = 'now -30 days';
2098                 }
2099
2100                 $check_date = DateTimeFormat::utc($last_update);
2101                 $authorid = Contact::getIdForURL($owner["url"], 0);
2102
2103                 $sql_extra = '';
2104                 if ($filter === 'posts') {
2105                         $sql_extra .= ' AND `item`.`id` = `item`.`parent` ';
2106                 }
2107
2108                 if ($filter === 'comments') {
2109                         $sql_extra .= sprintf(" AND `item`.`object-type` = '%s' ", dbesc(ACTIVITY_OBJ_COMMENT));
2110                 }
2111
2112                 $items = q(
2113                         "SELECT `item`.*, `item`.`id` AS `item_id` FROM `item` USE INDEX (`uid_contactid_created`)
2114                                 STRAIGHT_JOIN `thread` ON `thread`.`iid` = `item`.`parent`
2115                                 WHERE `item`.`uid` = %d
2116                                 AND `item`.`contact-id` = %d
2117                                 AND `item`.`author-id` = %d
2118                                 AND `item`.`created` > '%s'
2119                                 AND NOT `item`.`deleted`
2120                                 AND NOT `item`.`private`
2121                                 AND `thread`.`network` IN ('%s', '%s')
2122                                 $sql_extra
2123                                 ORDER BY `item`.`created` DESC LIMIT %d",
2124                         intval($owner["uid"]),
2125                         intval($owner["id"]),
2126                         intval($authorid),
2127                         dbesc($check_date),
2128                         dbesc(NETWORK_OSTATUS),
2129                         dbesc(NETWORK_DFRN),
2130                         intval($max_items)
2131                 );
2132
2133                 $doc = new DOMDocument('1.0', 'utf-8');
2134                 $doc->formatOutput = true;
2135
2136                 $root = self::addHeader($doc, $owner, $filter);
2137
2138                 foreach ($items as $item) {
2139                         if (Config::get('system', 'ostatus_debug')) {
2140                                 $item['body'] .= '🍼';
2141                         }
2142                         $entry = self::entry($doc, $item, $owner);
2143                         $root->appendChild($entry);
2144
2145                         if ($last_update < $item['created']) {
2146                                 $last_update = $item['created'];
2147                         }
2148                 }
2149
2150                 $feeddata = trim($doc->saveXML());
2151
2152                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2153                 Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
2154
2155                 logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, LOGGER_DEBUG);
2156
2157                 return $feeddata;
2158         }
2159
2160         /**
2161          * @brief Creates the XML for a salmon message
2162          *
2163          * @param array $item  Data of the item that is to be posted
2164          * @param array $owner Contact data of the poster
2165          *
2166          * @return string XML for the salmon
2167          */
2168         public static function salmon($item, $owner)
2169         {
2170                 $doc = new DOMDocument('1.0', 'utf-8');
2171                 $doc->formatOutput = true;
2172
2173                 if (Config::get('system', 'ostatus_debug')) {
2174                         $item['body'] .= '🐟';
2175                 }
2176
2177                 $entry = self::entry($doc, $item, $owner, true);
2178
2179                 $doc->appendChild($entry);
2180
2181                 return trim($doc->saveXML());
2182         }
2183 }