src/Protocol/OStatus.php

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