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