src/Protocol/OStatus.php

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