include/ostatus.php

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