src/Protocol/OStatus.php

   1 <?php
   2 /**
   3  * @file src/Protocol/OStatus.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 use DOMDocument;
   8 use DOMXPath;
   9 use Friendica\Content\Text\BBCode;
  10 use Friendica\Content\Text\HTML;
  11 use Friendica\Core\Cache;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\Lock;
  15 use Friendica\Core\System;
  16 use Friendica\Database\DBA;
  17 use Friendica\Model\Contact;
  18 use Friendica\Model\Conversation;
  19 use Friendica\Model\GContact;
  20 use Friendica\Model\Item;
  21 use Friendica\Model\User;
  22 use Friendica\Network\Probe;
  23 use Friendica\Object\Image;
  24 use Friendica\Util\DateTimeFormat;
  25 use Friendica\Util\Network;
  26 use Friendica\Util\Proxy as ProxyUtils;
  27 use Friendica\Util\XML;
  28
  29 require_once 'include/dba.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
  35 /**
  36  * @brief This class contain functions for the OStatus protocol
  37  */
  38 class OStatus
  39 {
  40         private static $itemlist;
  41         private static $conv_list = [];
  42
  43         /**
  44          * @brief Fetches author data
  45          *
  46          * @param object $xpath     The xpath object
  47          * @param object $context   The xml context of the author details
  48          * @param array  $importer  user record of the importing user
  49          * @param array  $contact   Called by reference, will contain the fetched contact
  50          * @param bool   $onlyfetch Only fetch the header without updating the contact entries
  51          *
  52          * @return array Array of author related entries for the item
  53          */
  54         private static function fetchAuthor(DOMXPath $xpath, $context, array $importer, array &$contact = null, $onlyfetch)
  55         {
  56                 $author = [];
  57                 $author["author-link"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
  58                 $author["author-name"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $context);
  59                 $addr = XML::getFirstNodeValue($xpath, 'atom:author/atom:email/text()', $context);
  60
  61                 $aliaslink = $author["author-link"];
  62
  63                 $alternate_item = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0);
  64                 if (is_object($alternate_item)) {
  65                         foreach ($alternate_item->attributes as $attributes) {
  66                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
  67                                         $author["author-link"] = $attributes->textContent;
  68                                 }
  69                         }
  70                 }
  71                 $author["author-id"] = Contact::getIdForURL($author["author-link"]);
  72
  73                 $author["contact-id"] = $contact["id"];
  74
  75                 $contact = null;
  76                 if ($aliaslink != '') {
  77                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ? AND `rel` IN (?, ?)",
  78                                         $importer["uid"], $aliaslink, NETWORK_STATUSNET,
  79                                         Contact::SHARING, Contact::FRIEND];
  80                         $contact = DBA::selectFirst('contact', [], $condition);
  81                 }
  82
  83                 if (!DBA::isResult($contact) && $author["author-link"] != '') {
  84                         if ($aliaslink == "") {
  85                                 $aliaslink = $author["author-link"];
  86                         }
  87
  88                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ? AND `rel` IN (?, ?)",
  89                                         $importer["uid"], normalise_link($author["author-link"]), normalise_link($aliaslink),
  90                                         NETWORK_STATUSNET, Contact::SHARING, Contact::FRIEND];
  91                         $contact = DBA::selectFirst('contact', [], $condition);
  92                 }
  93
  94                 if (!DBA::isResult($contact) && ($addr != '')) {
  95                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ? AND `rel` IN (?, ?)",
  96                                         $importer["uid"], $addr, NETWORK_STATUSNET,
  97                                         Contact::SHARING, Contact::FRIEND];
  98                         $contact = DBA::selectFirst('contact', [], $condition);
  99                 }
 100
 101                 if (DBA::isResult($contact)) {
 102                         if ($contact['blocked']) {
 103                                 $contact['id'] = -1;
 104                         }
 105                         $author["contact-id"] = $contact["id"];
 106                 }
 107
 108                 $avatarlist = [];
 109                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 110                 foreach ($avatars as $avatar) {
 111                         $href = "";
 112                         $width = 0;
 113                         foreach ($avatar->attributes as $attributes) {
 114                                 if ($attributes->name == "href") {
 115                                         $href = $attributes->textContent;
 116                                 }
 117                                 if ($attributes->name == "width") {
 118                                         $width = $attributes->textContent;
 119                                 }
 120                         }
 121                         if ($href != "") {
 122                                 $avatarlist[$width] = $href;
 123                         }
 124                 }
 125                 if (count($avatarlist) > 0) {
 126                         krsort($avatarlist);
 127                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 128                 }
 129
 130                 $displayname = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 131                 if ($displayname != "") {
 132                         $author["author-name"] = $displayname;
 133                 }
 134
 135                 $author["owner-id"] = $author["author-id"];
 136
 137                 // Only update the contacts if it is an OStatus contact
 138                 if (DBA::isResult($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact["network"] == NETWORK_OSTATUS)) {
 139
 140                         // Update contact data
 141                         $current = $contact;
 142                         unset($current['name-date']);
 143
 144                         // This query doesn't seem to work
 145                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 146                         // if ($value != "")
 147                         //      $contact["notify"] = $value;
 148
 149                         // This query doesn't seem to work as well - I hate these queries
 150                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 151                         // if ($value != "")
 152                         //      $contact["poll"] = $value;
 153
 154                         $contact['url'] = $author["author-link"];
 155                         $contact['nurl'] = normalise_link($contact['url']);
 156
 157                         $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
 158                         if ($value != "") {
 159                                 $contact["alias"] = $value;
 160                         }
 161
 162                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 163                         if ($value != "") {
 164                                 $contact["name"] = $value;
 165                         }
 166
 167                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 168                         if ($value != "") {
 169                                 $contact["nick"] = $value;
 170                         }
 171
 172                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()', $context);
 173                         if ($value != "") {
 174                                 $contact["about"] = HTML::toBBCode($value);
 175                         }
 176
 177                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()', $context);
 178                         if ($value != "") {
 179                                 $contact["location"] = $value;
 180                         }
 181
 182                         $contact['name-date'] = DateTimeFormat::utcNow();
 183
 184                         DBA::update('contact', $contact, ['id' => $contact["id"]], $current);
 185
 186                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 187                                 logger("Update profile picture for contact ".$contact["id"], LOGGER_DEBUG);
 188                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
 189                         }
 190
 191                         // Ensure that we are having this contact (with uid=0)
 192                         $cid = Contact::getIdForURL($aliaslink, 0, true);
 193
 194                         if ($cid) {
 195                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 196                                 $old_contact = DBA::selectFirst('contact', $fields, ['id' => $cid]);
 197
 198                                 // Update it with the current values
 199                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 200                                                 'nurl' => normalise_link($author["author-link"]),
 201                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 202                                                 'about' => $contact["about"], 'location' => $contact["location"],
 203                                                 'success_update' => DateTimeFormat::utcNow(), 'last-update' => DateTimeFormat::utcNow()];
 204
 205                                 DBA::update('contact', $fields, ['id' => $cid], $old_contact);
 206
 207                                 // Update the avatar
 208                                 if (!empty($author["author-avatar"])) {
 209                                         Contact::updateAvatar($author["author-avatar"], 0, $cid);
 210                                 }
 211                         }
 212
 213                         $contact["generation"] = 2;
 214                         $contact["hide"] = false; // OStatus contacts are never hidden
 215                         if (!empty($author["author-avatar"])) {
 216                                 $contact["photo"] = $author["author-avatar"];
 217                         }
 218                         $gcid = GContact::update($contact);
 219
 220                         GContact::link($gcid, $contact["uid"], $contact["id"]);
 221                 } else {
 222                         $contact = null;
 223                 }
 224
 225                 return $author;
 226         }
 227
 228         /**
 229          * @brief Fetches author data from a given XML string
 230          *
 231          * @param string $xml      The XML
 232          * @param array  $importer user record of the importing user
 233          *
 234          * @return array Array of author related entries for the item
 235          */
 236         public static function salmonAuthor($xml, array $importer)
 237         {
 238                 if ($xml == "") {
 239                         return;
 240                 }
 241
 242                 $doc = new DOMDocument();
 243                 @$doc->loadXML($xml);
 244
 245                 $xpath = new DOMXPath($doc);
 246                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 247                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 248                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 249                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 250                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 251                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 252                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 253                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 254
 255                 $contact = ["id" => 0];
 256
 257                 // Fetch the first author
 258                 $authordata = $xpath->query('//author')->item(0);
 259                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, true);
 260                 return $author;
 261         }
 262
 263         /**
 264          * @brief Read attributes from element
 265          *
 266          * @param object $element Element object
 267          *
 268          * @return array attributes
 269          */
 270         private static function readAttributes($element)
 271         {
 272                 $attribute = [];
 273
 274                 foreach ($element->attributes as $attributes) {
 275                         $attribute[$attributes->name] = $attributes->textContent;
 276                 }
 277
 278                 return $attribute;
 279         }
 280
 281         /**
 282          * @brief Imports an XML string containing OStatus elements
 283          *
 284          * @param string $xml      The XML
 285          * @param array  $importer user record of the importing user
 286          * @param array  $contact  contact
 287          * @param string $hub      Called by reference, returns the fetched hub data
 288          * @return void
 289          */
 290         public static function import($xml, array $importer, array &$contact = null, &$hub)
 291         {
 292                 self::process($xml, $importer, $contact, $hub);
 293         }
 294
 295         /**
 296          * @brief Internal feed processing
 297          *
 298          * @param string  $xml        The XML
 299          * @param array   $importer   user record of the importing user
 300          * @param array   $contact    contact
 301          * @param string  $hub        Called by reference, returns the fetched hub data
 302          * @param boolean $stored     Is the post fresh imported or from the database?
 303          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 304          *
 305          * @return boolean Could the XML be processed?
 306          */
 307         private static function process($xml, array $importer, array &$contact = null, &$hub, $stored = false, $initialize = true)
 308         {
 309                 if ($initialize) {
 310                         self::$itemlist = [];
 311                         self::$conv_list = [];
 312                 }
 313
 314                 logger("Import OStatus message", LOGGER_DEBUG);
 315
 316                 if ($xml == "") {
 317                         return false;
 318                 }
 319                 $doc = new DOMDocument();
 320                 @$doc->loadXML($xml);
 321
 322                 $xpath = new DOMXPath($doc);
 323                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 324                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 325                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 326                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 327                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 328                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 329                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 330                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 331
 332                 $hub = "";
 333                 $hub_items = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0);
 334                 if (is_object($hub_items)) {
 335                         $hub_attributes = $hub_items->attributes;
 336                         if (is_object($hub_attributes)) {
 337                                 foreach ($hub_attributes as $hub_attribute) {
 338                                         if ($hub_attribute->name == "href") {
 339                                                 $hub = $hub_attribute->textContent;
 340                                                 logger("Found hub ".$hub, LOGGER_DEBUG);
 341                                         }
 342                                 }
 343                         }
 344                 }
 345
 346                 $header = [];
 347                 $header["uid"] = $importer["uid"];
 348                 $header["network"] = NETWORK_OSTATUS;
 349                 $header["wall"] = 0;
 350                 $header["origin"] = 0;
 351                 $header["gravity"] = GRAVITY_COMMENT;
 352
 353                 $first_child = $doc->firstChild->tagName;
 354
 355                 if ($first_child == "feed") {
 356                         $entries = $xpath->query('/atom:feed/atom:entry');
 357                 } else {
 358                         $entries = $xpath->query('/atom:entry');
 359                 }
 360
 361                 if ($entries->length == 1) {
 362                         // We reformat the XML to make it better readable
 363                         $doc2 = new DOMDocument();
 364                         $doc2->loadXML($xml);
 365                         $doc2->preserveWhiteSpace = false;
 366                         $doc2->formatOutput = true;
 367                         $xml2 = $doc2->saveXML();
 368
 369                         $header["protocol"] = PROTOCOL_OSTATUS_SALMON;
 370                         $header["source"] = $xml2;
 371                 } elseif (!$initialize) {
 372                         return false;
 373                 }
 374
 375                 // Fetch the first author
 376                 $authordata = $xpath->query('//author')->item(0);
 377                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 378
 379                 $entry = $xpath->query('/atom:entry');
 380
 381                 // Reverse the order of the entries
 382                 $entrylist = [];
 383
 384                 foreach ($entries as $entry) {
 385                         $entrylist[] = $entry;
 386                 }
 387
 388                 foreach (array_reverse($entrylist) as $entry) {
 389                         // fetch the author
 390                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 391
 392                         if ($authorelement->length == 0) {
 393                                 $authorelement = $xpath->query('atom:author', $entry);
 394                         }
 395
 396                         if ($authorelement->length > 0) {
 397                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 398                         }
 399
 400                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $entry);
 401                         if ($value != "") {
 402                                 $nickname = $value;
 403                         } else {
 404                                 $nickname = $author["author-name"];
 405                         }
 406
 407                         $item = array_merge($header, $author);
 408
 409                         $item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 410
 411                         $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
 412
 413                         // Delete a message
 414                         if (in_array($item["verb"], ['qvitter-delete-notice', ACTIVITY_DELETE, 'delete'])) {
 415                                 self::deleteNotice($item);
 416                                 continue;
 417                         }
 418
 419                         if (in_array($item["verb"], [NAMESPACE_OSTATUS."/unfavorite", ACTIVITY_UNFAVORITE])) {
 420                                 // Ignore "Unfavorite" message
 421                                 logger("Ignore unfavorite message ".print_r($item, true), LOGGER_DEBUG);
 422                                 continue;
 423                         }
 424
 425                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 426                         if (Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 427                                 logger('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 428                                 continue;
 429                         } else {
 430                                 logger('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 431                         }
 432
 433                         if ($item["verb"] == ACTIVITY_JOIN) {
 434                                 // ignore "Join" messages
 435                                 logger("Ignore join message ".print_r($item, true), LOGGER_DEBUG);
 436                                 continue;
 437                         }
 438
 439                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 440                                 // ignore mastodon "block" messages
 441                                 logger("Ignore block message ".print_r($item, true), LOGGER_DEBUG);
 442                                 continue;
 443                         }
 444
 445                         if ($item["verb"] == ACTIVITY_FOLLOW) {
 446                                 Contact::addRelationship($importer, $contact, $item, $nickname);
 447                                 continue;
 448                         }
 449
 450                         if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
 451                                 $dummy = null;
 452                                 Contact::removeFollower($importer, $contact, $item, $dummy);
 453                                 continue;
 454                         }
 455
 456                         if ($item["verb"] == ACTIVITY_FAVORITE) {
 457                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 458                                 logger("Favorite ".$orig_uri." ".print_r($item, true));
 459
 460                                 $item["verb"] = ACTIVITY_LIKE;
 461                                 $item["parent-uri"] = $orig_uri;
 462                                 $item["gravity"] = GRAVITY_ACTIVITY;
 463                                 $item["object-type"] = ACTIVITY_OBJ_NOTE;
 464                         }
 465
 466                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 467                         if (!in_array($item["verb"], [ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE])) {
 468                                 logger("Unhandled verb ".$item["verb"]." ".print_r($item, true), LOGGER_DEBUG);
 469                         }
 470
 471                         self::processPost($xpath, $entry, $item, $importer);
 472
 473                         if ($initialize && (count(self::$itemlist) > 0)) {
 474                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 475                                         // We will import it everytime, when it is started by our contacts
 476                                         $valid = !empty(self::$itemlist[0]['contact-id']);
 477                                         if (!$valid) {
 478                                                 // If not, then it depends on this setting
 479                                                 $valid = !Config::get('system', 'ostatus_full_threads');
 480                                                 if ($valid) {
 481                                                         logger("Item with uri ".self::$itemlist[0]['uri']." will be imported due to the system settings.", LOGGER_DEBUG);
 482                                                 }
 483                                         } else {
 484                                                 logger("Item with uri ".self::$itemlist[0]['uri']." belongs to a contact (".self::$itemlist[0]['contact-id']."). It will be imported.", LOGGER_DEBUG);
 485                                         }
 486                                         if ($valid) {
 487                                                 // Never post a thread when the only interaction by our contact was a like
 488                                                 $valid = false;
 489                                                 $verbs = [ACTIVITY_POST, ACTIVITY_SHARE];
 490                                                 foreach (self::$itemlist as $item) {
 491                                                         if (!empty($item['contact-id']) && in_array($item['verb'], $verbs)) {
 492                                                                 $valid = true;
 493                                                         }
 494                                                 }
 495                                                 if ($valid) {
 496                                                         logger("Item with uri ".self::$itemlist[0]['uri']." will be imported since the thread contains posts or shares.", LOGGER_DEBUG);
 497                                                 }
 498                                         }
 499                                 } else {
 500                                         // But we will only import complete threads
 501                                         $valid = Item::exists(['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 502                                         if ($valid) {
 503                                                 logger("Item with uri ".self::$itemlist[0]["uri"]." belongs to parent ".self::$itemlist[0]['parent-uri']." of user ".$importer["uid"].". It will be imported.", LOGGER_DEBUG);
 504                                         }
 505                                 }
 506
 507                                 if ($valid) {
 508                                         $default_contact = 0;
 509                                         $key = count(self::$itemlist);
 510                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 511                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 512                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 513                                                 } else {
 514                                                         $default_contact = $item['contact-id'];
 515                                                 }
 516                                         }
 517                                         foreach (self::$itemlist as $item) {
 518                                                 $found = Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 519                                                 if ($found) {
 520                                                         logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", LOGGER_DEBUG);
 521                                                 } elseif ($item['contact-id'] < 0) {
 522                                                         logger("Item with uri ".$item["uri"]." is from a blocked contact.", LOGGER_DEBUG);
 523                                                 } else {
 524                                                         // We are having duplicated entries. Hopefully this solves it.
 525                                                         if (Lock::acquire('ostatus_process_item_insert')) {
 526                                                                 $ret = Item::insert($item);
 527                                                                 Lock::release('ostatus_process_item_insert');
 528                                                                 logger("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 529                                                         } else {
 530                                                                 $ret = Item::insert($item);
 531                                                                 logger("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
 532                                                         }
 533                                                 }
 534                                         }
 535                                 }
 536                                 self::$itemlist = [];
 537                         }
 538                         logger('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 539                 }
 540                 return true;
 541         }
 542
 543         /**
 544          * Removes notice item from database
 545          * @param array $item item
 546          * @return void
 547          */
 548         private static function deleteNotice(array $item)
 549         {
 550                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'uri' => $item['uri']];
 551                 if (!Item::exists($condition)) {
 552                         logger('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it.");
 553                         return;
 554                 }
 555
 556                 Item::delete($condition);
 557
 558                 logger('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 559         }
 560
 561         /**
 562          * @brief Processes the XML for a post
 563          *
 564          * @param object $xpath    The xpath object
 565          * @param object $entry    The xml entry that is processed
 566          * @param array  $item     The item array
 567          * @param array  $importer user record of the importing user
 568          * @return void
 569          */
 570         private static function processPost(DOMXPath $xpath, $entry, array &$item, array $importer)
 571         {
 572                 $item["body"] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 573                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 574                 if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
 575                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 576                         $item["body"] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 577                 } elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
 578                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 579                 }
 580
 581                 $item["created"] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 582                 $item["edited"] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 583                 $item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 584
 585                 $conv = $xpath->query('ostatus:conversation', $entry);
 586                 if (is_object($conv->item(0))) {
 587                         foreach ($conv->item(0)->attributes as $attributes) {
 588                                 if ($attributes->name == "ref") {
 589                                         $item['conversation-uri'] = $attributes->textContent;
 590                                 }
 591                                 if ($attributes->name == "href") {
 592                                         $item['conversation-href'] = $attributes->textContent;
 593                                 }
 594                         }
 595                 }
 596
 597                 $related = "";
 598
 599                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 600                 if (is_object($inreplyto->item(0))) {
 601                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 602                                 if ($attributes->name == "ref") {
 603                                         $item["parent-uri"] = $attributes->textContent;
 604                                 }
 605                                 if ($attributes->name == "href") {
 606                                         $related = $attributes->textContent;
 607                                 }
 608                         }
 609                 }
 610
 611                 $georsspoint = $xpath->query('georss:point', $entry);
 612                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 613                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 614                 }
 615
 616                 $categories = $xpath->query('atom:category', $entry);
 617                 if ($categories) {
 618                         foreach ($categories as $category) {
 619                                 foreach ($category->attributes as $attributes) {
 620                                         if ($attributes->name == "term") {
 621                                                 $term = $attributes->textContent;
 622                                                 if (!empty($item["tag"])) {
 623                                                         $item["tag"] .= ',';
 624                                                 } else {
 625                                                         $item["tag"] = '';
 626                                                 }
 627
 628                                                 $item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
 629                                         }
 630                                 }
 631                         }
 632                 }
 633
 634                 $self = '';
 635                 $add_body = '';
 636
 637                 $links = $xpath->query('atom:link', $entry);
 638                 if ($links) {
 639                         $link_data = self::processLinks($links, $item);
 640                         $self = $link_data['self'];
 641                         $add_body = $link_data['add_body'];
 642                 }
 643
 644                 $repeat_of = "";
 645
 646                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 647                 if ($notice_info && ($notice_info->length > 0)) {
 648                         foreach ($notice_info->item(0)->attributes as $attributes) {
 649                                 if ($attributes->name == "source") {
 650                                         $item["app"] = strip_tags($attributes->textContent);
 651                                 }
 652                                 if ($attributes->name == "repeat_of") {
 653                                         $repeat_of = $attributes->textContent;
 654                                 }
 655                         }
 656                 }
 657                 // Is it a repeated post?
 658                 if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
 659                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 660                         if (!empty($link_data['add_body'])) {
 661                                 $add_body .= $link_data['add_body'];
 662                         }
 663                 }
 664
 665                 $item["body"] .= $add_body;
 666
 667                 // Only add additional data when there is no picture in the post
 668                 if (!strstr($item["body"], '[/img]')) {
 669                         $item["body"] = add_page_info_to_body($item["body"]);
 670                 }
 671
 672                 // Mastodon Content Warning
 673                 if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 674                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 675                         if (!empty($clear_text)) {
 676                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 677                         }
 678                 }
 679
 680                 if (($self != '') && empty($item['protocol'])) {
 681                         self::fetchSelf($self, $item);
 682                 }
 683
 684                 if (!empty($item["conversation-href"])) {
 685                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 686                 }
 687
 688                 if (isset($item["parent-uri"])) {
 689                         if (!Item::exists(['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 690                                 if ($related != '') {
 691                                         self::fetchRelated($related, $item["parent-uri"], $importer);
 692                                 }
 693                         } else {
 694                                 logger('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 695                         }
 696                 } else {
 697                         $item["parent-uri"] = $item["uri"];
 698                         $item["gravity"] = GRAVITY_PARENT;
 699                 }
 700
 701                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 702                         $item = Conversation::insert($item);
 703                 }
 704
 705                 self::$itemlist[] = $item;
 706         }
 707
 708         /**
 709          * @brief Fetch the conversation for posts
 710          *
 711          * @param string $conversation     The link to the conversation
 712          * @param string $conversation_uri The conversation in "uri" format
 713          * @return void
 714          */
 715         private static function fetchConversation($conversation, $conversation_uri)
 716         {
 717                 // Ensure that we only store a conversation once in a process
 718                 if (isset(self::$conv_list[$conversation])) {
 719                         return;
 720                 }
 721
 722                 self::$conv_list[$conversation] = true;
 723
 724                 $conversation_data = Network::curl($conversation, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 725
 726                 if (!$conversation_data['success']) {
 727                         return;
 728                 }
 729
 730                 $xml = '';
 731
 732                 if (stristr($conversation_data['header'], 'Content-Type: application/atom+xml')) {
 733                         $xml = $conversation_data['body'];
 734                 }
 735
 736                 if ($xml == '') {
 737                         $doc = new DOMDocument();
 738                         if (!@$doc->loadHTML($conversation_data['body'])) {
 739                                 return;
 740                         }
 741                         $xpath = new DOMXPath($doc);
 742
 743                         $links = $xpath->query('//link');
 744                         if ($links) {
 745                                 $file = '';
 746                                 foreach ($links as $link) {
 747                                         $attribute = self::readAttributes($link);
 748                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 749                                                 $file = $attribute['href'];
 750                                         }
 751                                 }
 752                                 if ($file != '') {
 753                                         $conversation_atom = Network::curl($attribute['href']);
 754
 755                                         if ($conversation_atom['success']) {
 756                                                 $xml = $conversation_atom['body'];
 757                                         }
 758                                 }
 759                         }
 760                 }
 761
 762                 if ($xml == '') {
 763                         return;
 764                 }
 765
 766                 self::storeConversation($xml, $conversation, $conversation_uri);
 767         }
 768
 769         /**
 770          * @brief Store a feed in several conversation entries
 771          *
 772          * @param string $xml              The feed
 773          * @param string $conversation     conversation
 774          * @param string $conversation_uri conversation uri
 775          * @return void
 776          */
 777         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 778         {
 779                 $doc = new DOMDocument();
 780                 @$doc->loadXML($xml);
 781
 782                 $xpath = new DOMXPath($doc);
 783                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 784                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 785                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 786
 787                 $entries = $xpath->query('/atom:feed/atom:entry');
 788
 789                 // Now store the entries
 790                 foreach ($entries as $entry) {
 791                         $doc2 = new DOMDocument();
 792                         $doc2->preserveWhiteSpace = false;
 793                         $doc2->formatOutput = true;
 794
 795                         $conv_data = [];
 796
 797                         $conv_data['protocol'] = PROTOCOL_SPLITTED_CONV;
 798                         $conv_data['network'] = NETWORK_OSTATUS;
 799                         $conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 800
 801                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 802                         if (is_object($inreplyto->item(0))) {
 803                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 804                                         if ($attributes->name == "ref") {
 805                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 806                                         }
 807                                 }
 808                         }
 809
 810                         $conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 811
 812                         $conv = $xpath->query('ostatus:conversation', $entry);
 813                         if (is_object($conv->item(0))) {
 814                                 foreach ($conv->item(0)->attributes as $attributes) {
 815                                         if ($attributes->name == "ref") {
 816                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 817                                         }
 818                                         if ($attributes->name == "href") {
 819                                                 $conv_data['conversation-href'] = $attributes->textContent;
 820                                         }
 821                                 }
 822                         }
 823
 824                         if ($conversation != '') {
 825                                 $conv_data['conversation-uri'] = $conversation;
 826                         }
 827
 828                         if ($conversation_uri != '') {
 829                                 $conv_data['conversation-uri'] = $conversation_uri;
 830                         }
 831
 832                         $entry = $doc2->importNode($entry, true);
 833
 834                         $doc2->appendChild($entry);
 835
 836                         $conv_data['source'] = $doc2->saveXML();
 837
 838                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => PROTOCOL_OSTATUS_FEED];
 839                         if (DBA::exists('conversation', $condition)) {
 840                                 logger('Delete deprecated entry for URI '.$conv_data['uri'], LOGGER_DEBUG);
 841                                 DBA::delete('conversation', ['item-uri' => $conv_data['uri']]);
 842                         }
 843
 844                         logger('Store conversation data for uri '.$conv_data['uri'], LOGGER_DEBUG);
 845                         Conversation::insert($conv_data);
 846                 }
 847         }
 848
 849         /**
 850          * @brief Fetch the own post so that it can be stored later
 851          *
 852          * We want to store the original data for later processing.
 853          * This function is meant for cases where we process a feed with multiple entries.
 854          * In that case we need to fetch the single posts here.
 855          *
 856          * @param string $self The link to the self item
 857          * @param array  $item The item array
 858          * @return void
 859          */
 860         private static function fetchSelf($self, array &$item)
 861         {
 862                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 863                 if (DBA::exists('conversation', $condition)) {
 864                         logger('Conversation '.$item['uri'].' is already stored.', LOGGER_DEBUG);
 865                         return;
 866                 }
 867
 868                 $self_data = Network::curl($self);
 869
 870                 if (!$self_data['success']) {
 871                         return;
 872                 }
 873
 874                 // We reformat the XML to make it better readable
 875                 $doc = new DOMDocument();
 876                 $doc->loadXML($self_data['body']);
 877                 $doc->preserveWhiteSpace = false;
 878                 $doc->formatOutput = true;
 879                 $xml = $doc->saveXML();
 880
 881                 $item["protocol"] = PROTOCOL_OSTATUS_SALMON;
 882                 $item["source"] = $xml;
 883
 884                 logger('Conversation '.$item['uri'].' is now fetched.', LOGGER_DEBUG);
 885         }
 886
 887         /**
 888          * @brief Fetch related posts and processes them
 889          *
 890          * @param string $related     The link to the related item
 891          * @param string $related_uri The related item in "uri" format
 892          * @param array  $importer    user record of the importing user
 893          * @return void
 894          */
 895         private static function fetchRelated($related, $related_uri, $importer)
 896         {
 897                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 898                 $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 899                 if (DBA::isResult($conversation)) {
 900                         $stored = true;
 901                         $xml = $conversation['source'];
 902                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 903                                 logger('Got valid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 904                                 return;
 905                         }
 906                         if ($conversation['protocol'] == PROTOCOL_OSTATUS_SALMON) {
 907                                 logger('Delete invalid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 908                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 909                         }
 910                 }
 911
 912                 $stored = false;
 913                 $related_data = Network::curl($related, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 914
 915                 if (!$related_data['success']) {
 916                         return;
 917                 }
 918
 919                 $xml = '';
 920
 921                 if (stristr($related_data['header'], 'Content-Type: application/atom+xml')) {
 922                         logger('Directly fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 923                         $xml = $related_data['body'];
 924                 }
 925
 926                 if ($xml == '') {
 927                         $doc = new DOMDocument();
 928                         if (!@$doc->loadHTML($related_data['body'])) {
 929                                 return;
 930                         }
 931                         $xpath = new DOMXPath($doc);
 932
 933                         $atom_file = '';
 934
 935                         $links = $xpath->query('//link');
 936                         if ($links) {
 937                                 foreach ($links as $link) {
 938                                         $attribute = self::readAttributes($link);
 939                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 940                                                 $atom_file = $attribute['href'];
 941                                         }
 942                                 }
 943                                 if ($atom_file != '') {
 944                                         $related_atom = Network::curl($atom_file);
 945
 946                                         if ($related_atom['success']) {
 947                                                 logger('Fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 948                                                 $xml = $related_atom['body'];
 949                                         }
 950                                 }
 951                         }
 952                 }
 953
 954                 // Workaround for older GNU Social servers
 955                 if (($xml == '') && strstr($related, '/notice/')) {
 956                         $related_atom = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
 957
 958                         if ($related_atom['success']) {
 959                                 logger('GNU Social workaround to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 960                                 $xml = $related_atom['body'];
 961                         }
 962                 }
 963
 964                 // Even more worse workaround for GNU Social ;-)
 965                 if ($xml == '') {
 966                         $related_guess = OStatus::convertHref($related_uri);
 967                         $related_atom = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
 968
 969                         if ($related_atom['success']) {
 970                                 logger('GNU Social workaround 2 to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 971                                 $xml = $related_atom['body'];
 972                         }
 973                 }
 974
 975                 // Finally we take the data that we fetched from "ostatus:conversation"
 976                 if ($xml == '') {
 977                         $condition = ['item-uri' => $related_uri, 'protocol' => PROTOCOL_SPLITTED_CONV];
 978                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
 979                         if (DBA::isResult($conversation)) {
 980                                 $stored = true;
 981                                 logger('Got cached XML from conversation for URI '.$related_uri, LOGGER_DEBUG);
 982                                 $xml = $conversation['source'];
 983                         }
 984                 }
 985
 986                 if ($xml != '') {
 987                         self::process($xml, $importer, $contact, $hub, $stored, false);
 988                 } else {
 989                         logger("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, LOGGER_DEBUG);
 990                 }
 991                 return;
 992         }
 993
 994         /**
 995          * @brief Processes the XML for a repeated post
 996          *
 997          * @param object $xpath    The xpath object
 998          * @param object $entry    The xml entry that is processed
 999          * @param array  $item     The item array
1000          * @param array  $importer user record of the importing user
1001          *
1002          * @return array with data from links
1003          */
1004         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer)
1005         {
1006                 $activityobjects = $xpath->query('activity:object', $entry)->item(0);
1007
1008                 if (!is_object($activityobjects)) {
1009                         return [];
1010                 }
1011
1012                 $link_data = [];
1013
1014                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobjects);
1015
1016                 $links = $xpath->query("atom:link", $activityobjects);
1017                 if ($links) {
1018                         $link_data = self::processLinks($links, $item);
1019                 }
1020
1021                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobjects);
1022                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobjects);
1023                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobjects);
1024
1025                 $orig_author = self::fetchAuthor($xpath, $activityobjects, $importer, $dummy, false);
1026
1027                 $item["author-name"] = $orig_author["author-name"];
1028                 $item["author-link"] = $orig_author["author-link"];
1029                 $item["author-id"] = $orig_author["author-id"];
1030
1031                 $item["body"] = HTML::toBBCode($orig_body);
1032                 $item["created"] = $orig_created;
1033                 $item["edited"] = $orig_edited;
1034
1035                 $item["uri"] = $orig_uri;
1036
1037                 $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobjects);
1038
1039                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobjects);
1040
1041                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobjects);
1042                 if (is_object($inreplyto->item(0))) {
1043                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1044                                 if ($attributes->name == "ref") {
1045                                         $item["parent-uri"] = $attributes->textContent;
1046                                 }
1047                         }
1048                 }
1049
1050                 return $link_data;
1051         }
1052
1053         /**
1054          * @brief Processes links in the XML
1055          *
1056          * @param object $links The xml data that contain links
1057          * @param array  $item  The item array
1058          *
1059          * @return array with data from the links
1060          */
1061         private static function processLinks($links, array &$item)
1062         {
1063                 $link_data = ['add_body' => '', 'self' => ''];
1064
1065                 foreach ($links as $link) {
1066                         $attribute = self::readAttributes($link);
1067
1068                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1069                                 switch ($attribute['rel']) {
1070                                         case "alternate":
1071                                                 $item["plink"] = $attribute['href'];
1072                                                 if (($item["object-type"] == ACTIVITY_OBJ_QUESTION)
1073                                                         || ($item["object-type"] == ACTIVITY_OBJ_EVENT)
1074                                                 ) {
1075                                                         $item["body"] .= add_page_info($attribute['href']);
1076                                                 }
1077                                                 break;
1078                                         case "ostatus:conversation":
1079                                                 $link_data['conversation'] = $attribute['href'];
1080                                                 $item['conversation-href'] = $link_data['conversation'];
1081                                                 if (!isset($item['conversation-uri'])) {
1082                                                         $item['conversation-uri'] = $item['conversation-href'];
1083                                                 }
1084                                                 break;
1085                                         case "enclosure":
1086                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1087                                                 if ($filetype == 'image') {
1088                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1089                                                 } else {
1090                                                         if (!empty($item["attach"])) {
1091                                                                 $item["attach"] .= ',';
1092                                                         } else {
1093                                                                 $item["attach"] = '';
1094                                                         }
1095                                                         if (!isset($attribute['length'])) {
1096                                                                 $attribute['length'] = "0";
1097                                                         }
1098                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.defaults($attribute, 'title', '').'"[/attach]';
1099                                                 }
1100                                                 break;
1101                                         case "related":
1102                                                 if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
1103                                                         if (!isset($item["parent-uri"])) {
1104                                                                 $item["parent-uri"] = $attribute['href'];
1105                                                         }
1106                                                         $link_data['related'] = $attribute['href'];
1107                                                 } else {
1108                                                         $item["body"] .= add_page_info($attribute['href']);
1109                                                 }
1110                                                 break;
1111                                         case "self":
1112                                                 if (empty($item["plink"])) {
1113                                                         $item["plink"] = $attribute['href'];
1114                                                 }
1115                                                 $link_data['self'] = $attribute['href'];
1116                                                 break;
1117                                 }
1118                         }
1119                 }
1120                 return $link_data;
1121         }
1122
1123         /**
1124          * @brief Create an url out of an uri
1125          *
1126          * @param string $href URI in the format "parameter1:parameter1:..."
1127          *
1128          * @return string URL in the format http(s)://....
1129          */
1130         public static function convertHref($href)
1131         {
1132                 $elements = explode(":", $href);
1133
1134                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1135                         return $href;
1136                 }
1137
1138                 $server = explode(",", $elements[1]);
1139                 $conversation = explode("=", $elements[2]);
1140
1141                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1142                         return "http://".$server[0]."/notice/".$elements[3];
1143                 }
1144
1145                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1146                         return $href;
1147                 }
1148                 if ($elements[3] == "objectType=thread") {
1149                         return "http://".$server[0]."/conversation/".$conversation[1];
1150                 } else {
1151                         return "http://".$server[0]."/notice/".$conversation[1];
1152                 }
1153                 return $href;
1154         }
1155
1156         /**
1157          * @brief Checks if the current post is a reshare
1158          *
1159          * @param array $item The item array of thw post
1160          *
1161          * @return string The guid if the post is a reshare
1162          */
1163         private static function getResharedGuid(array $item)
1164         {
1165                 $body = trim($item["body"]);
1166
1167                 // Skip if it isn't a pure repeated messages
1168                 // Does it start with a share?
1169                 if (strpos($body, "[share") > 0) {
1170                         return "";
1171                 }
1172
1173                 // Does it end with a share?
1174                 if (strlen($body) > (strrpos($body, "[/share]") + 8)) {
1175                         return "";
1176                 }
1177
1178                 $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "$1", $body);
1179                 // Skip if there is no shared message in there
1180                 if ($body == $attributes) {
1181                         return false;
1182                 }
1183
1184                 $guid = "";
1185                 preg_match("/guid='(.*?)'/ism", $attributes, $matches);
1186                 if (!empty($matches[1])) {
1187                         $guid = $matches[1];
1188                 }
1189
1190                 preg_match('/guid="(.*?)"/ism', $attributes, $matches);
1191                 if (!empty($matches[1])) {
1192                         $guid = $matches[1];
1193                 }
1194
1195                 return $guid;
1196         }
1197
1198         /**
1199          * @brief Cleans the body of a post if it contains picture links
1200          *
1201          * @param string $body The body
1202          *
1203          * @return string The cleaned body
1204          */
1205         private static function formatPicturePost($body)
1206         {
1207                 $siteinfo = BBCode::getAttachedData($body);
1208
1209                 if (($siteinfo["type"] == "photo")) {
1210                         if (isset($siteinfo["preview"])) {
1211                                 $preview = $siteinfo["preview"];
1212                         } else {
1213                                 $preview = $siteinfo["image"];
1214                         }
1215
1216                         // Is it a remote picture? Then make a smaller preview here
1217                         $preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
1218
1219                         // Is it a local picture? Then make it smaller here
1220                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1221                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1222
1223                         if (isset($siteinfo["url"])) {
1224                                 $url = $siteinfo["url"];
1225                         } else {
1226                                 $url = $siteinfo["image"];
1227                         }
1228
1229                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1230                 }
1231
1232                 return $body;
1233         }
1234
1235         /**
1236          * @brief Adds the header elements to the XML document
1237          *
1238          * @param object $doc    XML document
1239          * @param array  $owner  Contact data of the poster
1240          * @param string $filter The related feed filter (activity, posts or comments)
1241          *
1242          * @return object header root element
1243          */
1244         private static function addHeader(DOMDocument $doc, array $owner, $filter)
1245         {
1246                 $a = get_app();
1247
1248                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
1249                 $doc->appendChild($root);
1250
1251                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1252                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1253                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1254                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1255                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
1256                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1257                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1258                 $root->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1259
1260                 $title = '';
1261                 switch ($filter) {
1262                         case 'activity': $title = L10n::t('%s\'s timeline', $owner['name']); break;
1263                         case 'posts'   : $title = L10n::t('%s\'s posts'   , $owner['name']); break;
1264                         case 'comments': $title = L10n::t('%s\'s comments', $owner['name']); break;
1265                 }
1266
1267                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1268                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1269                 XML::addElement($doc, $root, "id", System::baseUrl() . "/profile/" . $owner["nick"]);
1270                 XML::addElement($doc, $root, "title", $title);
1271                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], Config::get('config', 'sitename')));
1272                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1273                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1274
1275                 $author = self::addAuthor($doc, $owner);
1276                 $root->appendChild($author);
1277
1278                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1279                 XML::addElement($doc, $root, "link", "", $attributes);
1280
1281                 /// @TODO We have to find out what this is
1282                 /// $attributes = array("href" => System::baseUrl()."/sup",
1283                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1284                 ///             "type" => "application/json");
1285                 /// XML::addElement($doc, $root, "link", "", $attributes);
1286
1287                 self::hublinks($doc, $root, $owner["nick"]);
1288
1289                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1290                 XML::addElement($doc, $root, "link", "", $attributes);
1291
1292                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1293                 XML::addElement($doc, $root, "link", "", $attributes);
1294
1295                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1296                 XML::addElement($doc, $root, "link", "", $attributes);
1297
1298                 $attributes = ["href" => System::baseUrl() . "/api/statuses/user_timeline/" . $owner["nick"] . ".atom",
1299                         "rel" => "self", "type" => "application/atom+xml"];
1300                 XML::addElement($doc, $root, "link", "", $attributes);
1301
1302                 if ($owner['account-type'] == Contact::ACCOUNT_TYPE_COMMUNITY) {
1303                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1304                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1305                         $members = DBA::count('contact', $condition);
1306                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1307                 }
1308
1309                 return $root;
1310         }
1311
1312         /**
1313          * @brief Add the link to the push hubs to the XML document
1314          *
1315          * @param object $doc  XML document
1316          * @param object $root XML root element where the hub links are added
1317          * @param object $nick nick
1318          * @return void
1319          */
1320         public static function hublinks(DOMDocument $doc, $root, $nick)
1321         {
1322                 $h = System::baseUrl() . '/pubsubhubbub/'.$nick;
1323                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1324         }
1325
1326         /**
1327          * @brief Adds attachment data to the XML document
1328          *
1329          * @param object $doc  XML document
1330          * @param object $root XML root element where the hub links are added
1331          * @param array  $item Data of the item that is to be posted
1332          * @return void
1333          */
1334         private static function getAttachment(DOMDocument $doc, $root, $item)
1335         {
1336                 $o = "";
1337                 $siteinfo = BBCode::getAttachedData($item["body"]);
1338
1339                 switch ($siteinfo["type"]) {
1340                         case 'photo':
1341                                 $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1342                                 if ($imgdata) {
1343                                         $attributes = ["rel" => "enclosure",
1344                                                         "href" => $siteinfo["image"],
1345                                                         "type" => $imgdata["mime"],
1346                                                         "length" => intval($imgdata["size"])];
1347                                         XML::addElement($doc, $root, "link", "", $attributes);
1348                                 }
1349                                 break;
1350                         case 'video':
1351                                 $attributes = ["rel" => "enclosure",
1352                                                 "href" => $siteinfo["url"],
1353                                                 "type" => "text/html; charset=UTF-8",
1354                                                 "length" => "",
1355                                                 "title" => $siteinfo["title"]];
1356                                 XML::addElement($doc, $root, "link", "", $attributes);
1357                                 break;
1358                         default:
1359                                 break;
1360                 }
1361
1362                 if (!Config::get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1363                         $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1364                         if ($imgdata) {
1365                                 $attributes = ["rel" => "enclosure",
1366                                                 "href" => $siteinfo["image"],
1367                                                 "type" => $imgdata["mime"],
1368                                                 "length" => intval($imgdata["size"])];
1369
1370                                 XML::addElement($doc, $root, "link", "", $attributes);
1371                         }
1372                 }
1373
1374                 $arr = explode('[/attach],', $item['attach']);
1375                 if (count($arr)) {
1376                         foreach ($arr as $r) {
1377                                 $matches = false;
1378                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1379                                 if ($cnt) {
1380                                         $attributes = ["rel" => "enclosure",
1381                                                         "href" => $matches[1],
1382                                                         "type" => $matches[3]];
1383
1384                                         if (intval($matches[2])) {
1385                                                 $attributes["length"] = intval($matches[2]);
1386                                         }
1387                                         if (trim($matches[4]) != "") {
1388                                                 $attributes["title"] = trim($matches[4]);
1389                                         }
1390                                         XML::addElement($doc, $root, "link", "", $attributes);
1391                                 }
1392                         }
1393                 }
1394         }
1395
1396         /**
1397          * @brief Adds the author element to the XML document
1398          *
1399          * @param object $doc   XML document
1400          * @param array  $owner Contact data of the poster
1401          * @param bool   $show_profile Whether to show profile
1402          *
1403          * @return object author element
1404          */
1405         private static function addAuthor(DOMDocument $doc, array $owner, $show_profile = true)
1406         {
1407                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid'], 'is-default' => true]);
1408                 $author = $doc->createElement("author");
1409                 XML::addElement($doc, $author, "id", $owner["url"]);
1410                 if ($owner['account-type'] == Contact::ACCOUNT_TYPE_COMMUNITY) {
1411                         XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_GROUP);
1412                 } else {
1413                         XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_PERSON);
1414                 }
1415                 XML::addElement($doc, $author, "uri", $owner["url"]);
1416                 XML::addElement($doc, $author, "name", $owner["nick"]);
1417                 XML::addElement($doc, $author, "email", $owner["addr"]);
1418                 if ($show_profile) {
1419                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, 7));
1420                 }
1421
1422                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1423                 XML::addElement($doc, $author, "link", "", $attributes);
1424
1425                 $attributes = [
1426                                 "rel" => "avatar",
1427                                 "type" => "image/jpeg", // To-Do?
1428                                 "media:width" => 175,
1429                                 "media:height" => 175,
1430                                 "href" => $owner["photo"]];
1431                 XML::addElement($doc, $author, "link", "", $attributes);
1432
1433                 if (isset($owner["thumb"])) {
1434                         $attributes = [
1435                                         "rel" => "avatar",
1436                                         "type" => "image/jpeg", // To-Do?
1437                                         "media:width" => 80,
1438                                         "media:height" => 80,
1439                                         "href" => $owner["thumb"]];
1440                         XML::addElement($doc, $author, "link", "", $attributes);
1441                 }
1442
1443                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1444                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1445                 if ($show_profile) {
1446                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, 7));
1447
1448                         if (trim($owner["location"]) != "") {
1449                                 $element = $doc->createElement("poco:address");
1450                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1451                                 $author->appendChild($element);
1452                         }
1453                 }
1454
1455                 if (DBA::isResult($profile) && !$show_profile) {
1456                         if (trim($profile["homepage"]) != "") {
1457                                 $urls = $doc->createElement("poco:urls");
1458                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1459                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1460                                 XML::addElement($doc, $urls, "poco:primary", "true");
1461                                 $author->appendChild($urls);
1462                         }
1463
1464                         XML::addElement($doc, $author, "followers", "", ["url" => System::baseUrl()."/viewcontacts/".$owner["nick"]]);
1465                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1466
1467                         if ($profile["publish"]) {
1468                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1469                         }
1470                 }
1471
1472                 return $author;
1473         }
1474
1475         /**
1476          * @TODO Picture attachments should look like this:
1477          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1478          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1479          */
1480
1481         /**
1482          * @brief Returns the given activity if present - otherwise returns the "post" activity
1483          *
1484          * @param array $item Data of the item that is to be posted
1485          *
1486          * @return string activity
1487          */
1488         private static function constructVerb(array $item)
1489         {
1490                 if (!empty($item['verb'])) {
1491                         return $item['verb'];
1492                 }
1493
1494                 return ACTIVITY_POST;
1495         }
1496
1497         /**
1498          * @brief Returns the given object type if present - otherwise returns the "note" object type
1499          *
1500          * @param array $item Data of the item that is to be posted
1501          *
1502          * @return string Object type
1503          */
1504         private static function constructObjecttype(array $item)
1505         {
1506                 if (in_array($item['object-type'], [ACTIVITY_OBJ_NOTE, ACTIVITY_OBJ_COMMENT]))
1507                         return $item['object-type'];
1508                 return ACTIVITY_OBJ_NOTE;
1509         }
1510
1511         /**
1512          * @brief Adds an entry element to the XML document
1513          *
1514          * @param object $doc      XML document
1515          * @param array  $item     Data of the item that is to be posted
1516          * @param array  $owner    Contact data of the poster
1517          * @param bool   $toplevel optional default false
1518          *
1519          * @return object Entry element
1520          */
1521         private static function entry(DOMDocument $doc, array $item, array $owner, $toplevel = false)
1522         {
1523                 $xml = null;
1524
1525                 $repeated_guid = self::getResharedGuid($item);
1526                 if ($repeated_guid != "") {
1527                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1528                 }
1529
1530                 if ($xml) {
1531                         return $xml;
1532                 }
1533
1534                 if ($item["verb"] == ACTIVITY_LIKE) {
1535                         return self::likeEntry($doc, $item, $owner, $toplevel);
1536                 } elseif (in_array($item["verb"], [ACTIVITY_FOLLOW, NAMESPACE_OSTATUS."/unfollow"])) {
1537                         return self::followEntry($doc, $item, $owner, $toplevel);
1538                 } else {
1539                         return self::noteEntry($doc, $item, $owner, $toplevel);
1540                 }
1541         }
1542
1543         /**
1544          * @brief Adds a source entry to the XML document
1545          *
1546          * @param object $doc     XML document
1547          * @param array  $contact Array of the contact that is added
1548          *
1549          * @return object Source element
1550          */
1551         private static function sourceEntry(DOMDocument $doc, array $contact)
1552         {
1553                 $source = $doc->createElement("source");
1554                 XML::addElement($doc, $source, "id", $contact["poll"]);
1555                 XML::addElement($doc, $source, "title", $contact["name"]);
1556                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1557                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1558                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1559                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1560
1561                 return $source;
1562         }
1563
1564         /**
1565          * @brief Fetches contact data from the contact or the gcontact table
1566          *
1567          * @param string $url   URL of the contact
1568          * @param array  $owner Contact data of the poster
1569          *
1570          * @return array Contact array
1571          */
1572         private static function contactEntry($url, array $owner)
1573         {
1574                 $r = q(
1575                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1576                         DBA::escape(normalise_link($url)),
1577                         intval($owner["uid"])
1578                 );
1579                 if (DBA::isResult($r)) {
1580                         $contact = $r[0];
1581                         $contact["uid"] = -1;
1582                 }
1583
1584                 if (!DBA::isResult($r)) {
1585                         $r = q(
1586                                 "SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
1587                                 DBA::escape(normalise_link($url))
1588                         );
1589                         if (DBA::isResult($r)) {
1590                                 $contact = $r[0];
1591                                 $contact["uid"] = -1;
1592                                 $contact["success_update"] = $contact["updated"];
1593                         }
1594                 }
1595
1596                 if (!DBA::isResult($r)) {
1597                         $contact = owner;
1598                 }
1599
1600                 if (!isset($contact["poll"])) {
1601                         $data = Probe::uri($url);
1602                         $contact["poll"] = $data["poll"];
1603
1604                         if (!$contact["alias"]) {
1605                                 $contact["alias"] = $data["alias"];
1606                         }
1607                 }
1608
1609                 if (!isset($contact["alias"])) {
1610                         $contact["alias"] = $contact["url"];
1611                 }
1612
1613                 $contact['account-type'] = $owner['account-type'];
1614
1615                 return $contact;
1616         }
1617
1618         /**
1619          * @brief Adds an entry element with reshared content
1620          *
1621          * @param object $doc           XML document
1622          * @param array  $item          Data of the item that is to be posted
1623          * @param array  $owner         Contact data of the poster
1624          * @param string $repeated_guid guid
1625          * @param bool   $toplevel      Is it for en entry element (false) or a feed entry (true)?
1626          *
1627          * @return object Entry element
1628          */
1629         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid, $toplevel)
1630         {
1631                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1632                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1633                 }
1634
1635                 $title = self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1636
1637                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => false,
1638                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS]];
1639                 $repeated_item = Item::selectFirst([], $condition);
1640                 if (!DBA::isResult($repeated_item)) {
1641                         return false;
1642                 }
1643
1644                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1645
1646                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1647
1648                 self::entryContent($doc, $entry, $item, $owner, $title, ACTIVITY_SHARE, false);
1649
1650                 $as_object = $doc->createElement("activity:object");
1651
1652                 XML::addElement($doc, $as_object, "activity:object-type", NAMESPACE_ACTIVITY_SCHEMA."activity");
1653
1654                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1655
1656                 $author = self::addAuthor($doc, $contact, false);
1657                 $as_object->appendChild($author);
1658
1659                 $as_object2 = $doc->createElement("activity:object");
1660
1661                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1662
1663                 $title = sprintf("New comment by %s", $contact["nick"]);
1664
1665                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1666
1667                 $as_object->appendChild($as_object2);
1668
1669                 self::entryFooter($doc, $as_object, $item, $owner, false);
1670
1671                 $source = self::sourceEntry($doc, $contact);
1672
1673                 $as_object->appendChild($source);
1674
1675                 $entry->appendChild($as_object);
1676
1677                 self::entryFooter($doc, $entry, $item, $owner);
1678
1679                 return $entry;
1680         }
1681
1682         /**
1683          * @brief Adds an entry element with a "like"
1684          *
1685          * @param object $doc      XML document
1686          * @param array  $item     Data of the item that is to be posted
1687          * @param array  $owner    Contact data of the poster
1688          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1689          *
1690          * @return object Entry element with "like"
1691          */
1692         private static function likeEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1693         {
1694                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1695                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1696                 }
1697
1698                 $title = self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1699
1700                 $verb = NAMESPACE_ACTIVITY_SCHEMA."favorite";
1701                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1702
1703                 $as_object = $doc->createElement("activity:object");
1704
1705                 $parent = Item::selectFirst([], ['uri' => $item["thr-parent"], 'uid' => $item["uid"]]);
1706
1707                 if (!$parent) {
1708                         $parent = [];
1709                 }
1710
1711                 XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent));
1712
1713                 self::entryContent($doc, $as_object, $parent, $owner, "New entry");
1714
1715                 $entry->appendChild($as_object);
1716
1717                 self::entryFooter($doc, $entry, $item, $owner);
1718
1719                 return $entry;
1720         }
1721
1722         /**
1723          * @brief Adds the person object element to the XML document
1724          *
1725          * @param object $doc     XML document
1726          * @param array  $owner   Contact data of the poster
1727          * @param array  $contact Contact data of the target
1728          *
1729          * @return object author element
1730          */
1731         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact)
1732         {
1733                 $object = $doc->createElement("activity:object");
1734                 XML::addElement($doc, $object, "activity:object-type", ACTIVITY_OBJ_PERSON);
1735
1736                 if ($contact['network'] == NETWORK_PHANTOM) {
1737                         XML::addElement($doc, $object, "id", $contact['url']);
1738                         return $object;
1739                 }
1740
1741                 XML::addElement($doc, $object, "id", $contact["alias"]);
1742                 XML::addElement($doc, $object, "title", $contact["nick"]);
1743
1744                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1745                 XML::addElement($doc, $object, "link", "", $attributes);
1746
1747                 $attributes = [
1748                                 "rel" => "avatar",
1749                                 "type" => "image/jpeg", // To-Do?
1750                                 "media:width" => 175,
1751                                 "media:height" => 175,
1752                                 "href" => $contact["photo"]];
1753                 XML::addElement($doc, $object, "link", "", $attributes);
1754
1755                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1756                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1757
1758                 if (trim($contact["location"]) != "") {
1759                         $element = $doc->createElement("poco:address");
1760                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1761                         $object->appendChild($element);
1762                 }
1763
1764                 return $object;
1765         }
1766
1767         /**
1768          * @brief Adds a follow/unfollow entry element
1769          *
1770          * @param object $doc      XML document
1771          * @param array  $item     Data of the follow/unfollow message
1772          * @param array  $owner    Contact data of the poster
1773          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1774          *
1775          * @return object Entry element
1776          */
1777         private static function followEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1778         {
1779                 $item["id"] = $item["parent"] = 0;
1780                 $item["created"] = $item["edited"] = date("c");
1781                 $item["private"] = true;
1782
1783                 $contact = Probe::uri($item['follow']);
1784
1785                 if ($contact['alias'] == '') {
1786                         $contact['alias'] = $contact["url"];
1787                 } else {
1788                         $item['follow'] = $contact['alias'];
1789                 }
1790
1791                 $r = q(
1792                         "SELECT `id` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1793                         intval($owner['uid']),
1794                         DBA::escape(normalise_link($contact["url"]))
1795                 );
1796
1797                 if (DBA::isResult($r)) {
1798                         $connect_id = $r[0]['id'];
1799                 } else {
1800                         $connect_id = 0;
1801                 }
1802
1803                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1804                         $message = L10n::t('%s is now following %s.');
1805                         $title = L10n::t('following');
1806                         $action = "subscription";
1807                 } else {
1808                         $message = L10n::t('%s stopped following %s.');
1809                         $title = L10n::t('stopped following');
1810                         $action = "unfollow";
1811                 }
1812
1813                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1814                                 = 'tag:'.get_app()->get_hostname().
1815                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1816                                 ':person:'.$connect_id.':'.$item['created'];
1817
1818                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1819
1820                 self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1821
1822                 self::entryContent($doc, $entry, $item, $owner, $title);
1823
1824                 $object = self::addPersonObject($doc, $owner, $contact);
1825                 $entry->appendChild($object);
1826
1827                 self::entryFooter($doc, $entry, $item, $owner);
1828
1829                 return $entry;
1830         }
1831
1832         /**
1833          * @brief Adds a regular entry element
1834          *
1835          * @param object $doc      XML document
1836          * @param array  $item     Data of the item that is to be posted
1837          * @param array  $owner    Contact data of the poster
1838          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1839          *
1840          * @return object Entry element
1841          */
1842         private static function noteEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1843         {
1844                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1845                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1846                 }
1847
1848                 $title = self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1849
1850                 XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1851
1852                 self::entryContent($doc, $entry, $item, $owner, $title);
1853
1854                 self::entryFooter($doc, $entry, $item, $owner);
1855
1856                 return $entry;
1857         }
1858
1859         /**
1860          * @brief Adds a header element to the XML document
1861          *
1862          * @param object $doc      XML document
1863          * @param object $entry    The entry element where the elements are added
1864          * @param array  $owner    Contact data of the poster
1865          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1866          *
1867          * @return string The title for the element
1868          */
1869         private static function entryHeader(DOMDocument $doc, &$entry, array $owner, array $item, $toplevel)
1870         {
1871                 /// @todo Check if this title stuff is really needed (I guess not)
1872                 if (!$toplevel) {
1873                         $entry = $doc->createElement("entry");
1874                         $title = sprintf("New note by %s", $owner["nick"]);
1875
1876                         if ($owner['account-type'] == Contact::ACCOUNT_TYPE_COMMUNITY) {
1877                                 $contact = self::contactEntry($item['author-link'], $owner);
1878                                 $author = self::addAuthor($doc, $contact, false);
1879                                 $entry->appendChild($author);
1880                         }
1881                 } else {
1882                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, "entry");
1883
1884                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1885                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1886                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1887                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1888                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
1889                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1890                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1891                         $entry->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1892
1893                         $author = self::addAuthor($doc, $owner);
1894                         $entry->appendChild($author);
1895
1896                         $title = sprintf("New comment by %s", $owner["nick"]);
1897                 }
1898                 return $title;
1899         }
1900
1901         /**
1902          * @brief Adds elements to the XML document
1903          *
1904          * @param object $doc      XML document
1905          * @param object $entry    Entry element where the content is added
1906          * @param array  $item     Data of the item that is to be posted
1907          * @param array  $owner    Contact data of the poster
1908          * @param string $title    Title for the post
1909          * @param string $verb     The activity verb
1910          * @param bool   $complete Add the "status_net" element?
1911          * @return void
1912          */
1913         private static function entryContent(DOMDocument $doc, $entry, array $item, array $owner, $title, $verb = "", $complete = true)
1914         {
1915                 if ($verb == "") {
1916                         $verb = self::constructVerb($item);
1917                 }
1918
1919                 XML::addElement($doc, $entry, "id", $item["uri"]);
1920                 XML::addElement($doc, $entry, "title", $title);
1921
1922                 $body = self::formatPicturePost($item['body']);
1923
1924                 if ($item['title'] != "") {
1925                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1926                 }
1927
1928                 $body = BBCode::convert($body, false, 7);
1929
1930                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1931
1932                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1933                                                                 "href" => System::baseUrl()."/display/".$item["guid"]]
1934                 );
1935
1936                 if ($complete && ($item["id"] > 0)) {
1937                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1938                 }
1939
1940                 XML::addElement($doc, $entry, "activity:verb", $verb);
1941
1942                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1943                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1944         }
1945
1946         /**
1947          * @brief Adds the elements at the foot of an entry to the XML document
1948          *
1949          * @param object $doc      XML document
1950          * @param object $entry    The entry element where the elements are added
1951          * @param array  $item     Data of the item that is to be posted
1952          * @param array  $owner    Contact data of the poster
1953          * @param bool   $complete default true
1954          * @return void
1955          */
1956         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, $complete = true)
1957         {
1958                 $mentioned = [];
1959
1960                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
1961                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item["parent"]]);
1962                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1963
1964                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $parent_item]);
1965
1966                         if (DBA::isResult($thrparent)) {
1967                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
1968                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
1969                                 $parent_plink = $thrparent["plink"];
1970                         } else {
1971                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
1972                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
1973                                 $parent_plink = System::baseUrl()."/display/".$parent["guid"];
1974                         }
1975
1976                         $attributes = [
1977                                         "ref" => $parent_item,
1978                                         "href" => $parent_plink];
1979                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1980
1981                         $attributes = [
1982                                         "rel" => "related",
1983                                         "href" => $parent_plink];
1984                         XML::addElement($doc, $entry, "link", "", $attributes);
1985                 }
1986
1987                 if (intval($item["parent"]) > 0) {
1988                         $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
1989                         $conversation_uri = $conversation_href;
1990
1991                         if (isset($parent_item)) {
1992                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
1993                                 if (DBA::isResult($conversation)) {
1994                                         if ($conversation['conversation-uri'] != '') {
1995                                                 $conversation_uri = $conversation['conversation-uri'];
1996                                         }
1997                                         if ($conversation['conversation-href'] != '') {
1998                                                 $conversation_href = $conversation['conversation-href'];
1999                                         }
2000                                 }
2001                         }
2002
2003                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
2004
2005                         $attributes = [
2006                                         "href" => $conversation_href,
2007                                         "local_id" => $item["parent"],
2008                                         "ref" => $conversation_uri];
2009
2010                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
2011                 }
2012
2013                 $tags = item::getFeedTags($item);
2014
2015                 if (count($tags)) {
2016                         foreach ($tags as $t) {
2017                                 if ($t[0] == "@") {
2018                                         $mentioned[$t[1]] = $t[1];
2019                                 }
2020                         }
2021                 }
2022
2023                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
2024                 $newmentions = [];
2025                 foreach ($mentioned as $mention) {
2026                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
2027                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
2028                 }
2029                 $mentioned = $newmentions;
2030
2031                 foreach ($mentioned as $mention) {
2032                         $condition = ['uid' => $owner['uid'], 'nurl' => normalise_link($mention)];
2033                         $contact = DBA::selectFirst('contact', ['forum', 'prv', 'self', 'contact-type'], $condition);
2034                         if ($contact["forum"] || $contact["prv"] || ($owner['contact-type'] == Contact::ACCOUNT_TYPE_COMMUNITY) ||
2035                                 ($contact['self'] && ($owner['account-type'] == Contact::ACCOUNT_TYPE_COMMUNITY))) {
2036                                 XML::addElement($doc, $entry, "link", "",
2037                                         [
2038                                                 "rel" => "mentioned",
2039                                                 "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
2040                                                 "href" => $mention]
2041                                 );
2042                         } else {
2043                                 XML::addElement($doc, $entry, "link", "",
2044                                         [
2045                                                 "rel" => "mentioned",
2046                                                 "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
2047                                                 "href" => $mention]
2048                                 );
2049                         }
2050                 }
2051
2052                 if ($owner['account-type'] == Contact::ACCOUNT_TYPE_COMMUNITY) {
2053                         XML::addElement($doc, $entry, "link", "", [
2054                                 "rel" => "mentioned",
2055                                 "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2056                                 "href" => $owner['url']
2057                         ]);
2058                 }
2059
2060                 if (!$item["private"]) {
2061                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2062                                                                         "href" => "http://activityschema.org/collection/public"]);
2063                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2064                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2065                                                                         "href" => "http://activityschema.org/collection/public"]);
2066                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2067                 }
2068
2069                 if (count($tags)) {
2070                         foreach ($tags as $t) {
2071                                 if ($t[0] != "@") {
2072                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2073                                 }
2074                         }
2075                 }
2076
2077                 self::getAttachment($doc, $entry, $item);
2078
2079                 if ($complete && ($item["id"] > 0)) {
2080                         $app = $item["app"];
2081                         if ($app == "") {
2082                                 $app = "web";
2083                         }
2084
2085                         $attributes = ["local_id" => $item["id"], "source" => $app];
2086
2087                         if (isset($parent["id"])) {
2088                                 $attributes["repeat_of"] = $parent["id"];
2089                         }
2090
2091                         if ($item["coord"] != "") {
2092                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2093                         }
2094
2095                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2096                 }
2097         }
2098
2099         /**
2100          * Creates the XML feed for a given nickname
2101          *
2102          * Supported filters:
2103          * - activity (default): all the public posts
2104          * - posts: all the public top-level posts
2105          * - comments: all the public replies
2106          *
2107          * Updates the provided last_update parameter if the result comes from the
2108          * cache or it is empty
2109          *
2110          * @brief Creates the XML feed for a given nickname
2111          *
2112          * @param string  $owner_nick  Nickname of the feed owner
2113          * @param string  $last_update Date of the last update
2114          * @param integer $max_items   Number of maximum items to fetch
2115          * @param string  $filter      Feed items filter (activity, posts or comments)
2116          * @param boolean $nocache     Wether to bypass caching
2117          *
2118          * @return string XML feed
2119          */
2120         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2121         {
2122                 $stamp = microtime(true);
2123
2124                 $owner = User::getOwnerDataByNick($owner_nick);
2125                 if (!$owner) {
2126                         return;
2127                 }
2128
2129                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2130
2131                 $previous_created = $last_update;
2132
2133                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2134                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2135                         $result = Cache::get($cachekey);
2136                         if (!$nocache && !is_null($result)) {
2137                                 logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', LOGGER_DEBUG);
2138                                 $last_update = $result['last_update'];
2139                                 return $result['feed'];
2140                         }
2141                 }
2142
2143                 if (!strlen($last_update)) {
2144                         $last_update = 'now -30 days';
2145                 }
2146
2147                 $check_date = DateTimeFormat::utc($last_update);
2148                 $authorid = Contact::getIdForURL($owner["url"], 0, true);
2149
2150                 $condition = ["`uid` = ? AND `created` > ? AND NOT `deleted`
2151                         AND NOT `private` AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2152                         $owner["uid"], $check_date, NETWORK_OSTATUS, NETWORK_DFRN];
2153
2154                 if ($filter === 'comments') {
2155                         $condition[0] .= " AND `object-type` = ? ";
2156                         $condition[] = ACTIVITY_OBJ_COMMENT;
2157                 }
2158
2159                 if ($owner['account-type'] != Contact::ACCOUNT_TYPE_COMMUNITY) {
2160                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2161                         $condition[] = $owner["id"];
2162                         $condition[] = $authorid;
2163                 }
2164
2165                 $params = ['order' => ['created' => true], 'limit' => $max_items];
2166
2167                 if ($filter === 'posts') {
2168                         $ret = Item::selectThread([], $condition, $params);
2169                 } else {
2170                         $ret = Item::select([], $condition, $params);
2171                 }
2172
2173                 $items = Item::inArray($ret);
2174
2175                 $doc = new DOMDocument('1.0', 'utf-8');
2176                 $doc->formatOutput = true;
2177
2178                 $root = self::addHeader($doc, $owner, $filter);
2179
2180                 foreach ($items as $item) {
2181                         if (Config::get('system', 'ostatus_debug')) {
2182                                 $item['body'] .= '🍼';
2183                         }
2184                         $entry = self::entry($doc, $item, $owner);
2185                         $root->appendChild($entry);
2186
2187                         if ($last_update < $item['created']) {
2188                                 $last_update = $item['created'];
2189                         }
2190                 }
2191
2192                 $feeddata = trim($doc->saveXML());
2193
2194                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2195                 Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
2196
2197                 logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, LOGGER_DEBUG);
2198
2199                 return $feeddata;
2200         }
2201
2202         /**
2203          * @brief Creates the XML for a salmon message
2204          *
2205          * @param array $item  Data of the item that is to be posted
2206          * @param array $owner Contact data of the poster
2207          *
2208          * @return string XML for the salmon
2209          */
2210         public static function salmon(array $item, array $owner)
2211         {
2212                 $doc = new DOMDocument('1.0', 'utf-8');
2213                 $doc->formatOutput = true;
2214
2215                 if (Config::get('system', 'ostatus_debug')) {
2216                         $item['body'] .= '🐟';
2217                 }
2218
2219                 $entry = self::entry($doc, $item, $owner, true);
2220
2221                 $doc->appendChild($entry);
2222
2223                 return trim($doc->saveXML());
2224         }
2225 }