src/Protocol/OStatus.php

   1 <?php
   2 /**
   3  * @file src/Protocol/OStatus.php
   4  */
   5 namespace Friendica\Protocol;
   6
   7 use Friendica\App;
   8 use Friendica\Content\Text\BBCode;
   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\GContact;
  16 use Friendica\Model\Conversation;
  17 use Friendica\Network\Probe;
  18 use Friendica\Object\Image;
  19 use Friendica\Util\Lock;
  20 use Friendica\Util\Network;
  21 use Friendica\Util\XML;
  22 use dba;
  23 use DOMDocument;
  24 use DOMXPath;
  25
  26 require_once 'include/dba.php';
  27 require_once 'include/threads.php';
  28 require_once 'include/html2bbcode.php';
  29 require_once 'include/bbcode.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                 $found = false;
  75
  76                 if ($aliaslink != '') {
  77                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ?",
  78                                         $importer["uid"], $aliaslink, NETWORK_STATUSNET];
  79                         $r = dba::selectFirst('contact', [], $condition);
  80
  81                         if (DBM::is_result($r)) {
  82                                 $found = true;
  83                                 if ($r['blocked']) {
  84                                         $r['id'] = -1;
  85                                 }
  86                                 $contact = $r;
  87                                 $author["contact-id"] = $r["id"];
  88                         }
  89                 }
  90
  91                 if (!$found && ($author["author-link"] != "")) {
  92                         if ($aliaslink == "") {
  93                                 $aliaslink = $author["author-link"];
  94                         }
  95
  96                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ?", $importer["uid"],
  97                                         normalise_link($author["author-link"]), normalise_link($aliaslink), NETWORK_STATUSNET];
  98                         $r = dba::selectFirst('contact', [], $condition);
  99
 100                         if (DBM::is_result($r)) {
 101                                 $found = true;
 102                                 if ($r['blocked']) {
 103                                         $r['id'] = -1;
 104                                 }
 105                                 $contact = $r;
 106                                 $author["contact-id"] = $r["id"];
 107                         }
 108                 }
 109
 110                 if (!$found && ($addr != "")) {
 111                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ?",
 112                                         $importer["uid"], $addr, NETWORK_STATUSNET];
 113                         $r = dba::selectFirst('contact', [], $condition);
 114
 115                         if (DBM::is_result($r)) {
 116                                 $found = true;
 117                                 if ($r['blocked']) {
 118                                         $r['id'] = -1;
 119                                 }
 120                                 $contact = $r;
 121                                 $author["contact-id"] = $r["id"];
 122                         }
 123                 }
 124
 125                 $avatarlist = [];
 126                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 127                 foreach ($avatars as $avatar) {
 128                         $href = "";
 129                         $width = 0;
 130                         foreach ($avatar->attributes as $attributes) {
 131                                 if ($attributes->name == "href") {
 132                                         $href = $attributes->textContent;
 133                                 }
 134                                 if ($attributes->name == "width") {
 135                                         $width = $attributes->textContent;
 136                                 }
 137                         }
 138                         if ($href != "") {
 139                                 $avatarlist[$width] = $href;
 140                         }
 141                 }
 142                 if (count($avatarlist) > 0) {
 143                         krsort($avatarlist);
 144                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 145                 }
 146
 147                 $displayname = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
 148                 if ($displayname != "") {
 149                         $author["author-name"] = $displayname;
 150                 }
 151
 152                 $author["owner-name"] = $author["author-name"];
 153                 $author["owner-link"] = $author["author-link"];
 154                 $author["owner-avatar"] = $author["author-avatar"];
 155
 156                 // Only update the contacts if it is an OStatus contact
 157                 if ($r && ($r['id'] > 0) && !$onlyfetch && ($contact["network"] == NETWORK_OSTATUS)) {
 158
 159                         // Update contact data
 160                         $current = $contact;
 161                         unset($current['name-date']);
 162
 163                         // This query doesn't seem to work
 164                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 165                         // if ($value != "")
 166                         //      $contact["notify"] = $value;
 167
 168                         // This query doesn't seem to work as well - I hate these queries
 169                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 170                         // if ($value != "")
 171                         //      $contact["poll"] = $value;
 172
 173                         $contact['url'] = $author["author-link"];
 174                         $contact['nurl'] = normalise_link($contact['url']);
 175
 176                         $value = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
 177                         if ($value != "") {
 178                                 $contact["alias"] = $value;
 179                         }
 180
 181                         $value = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
 182                         if ($value != "") {
 183                                 $contact["name"] = $value;
 184                         }
 185
 186                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $context)->item(0)->nodeValue;
 187                         if ($value != "") {
 188                                 $contact["nick"] = $value;
 189                         }
 190
 191                         $value = $xpath->evaluate('atom:author/poco:note/text()', $context)->item(0)->nodeValue;
 192                         if ($value != "") {
 193                                 $contact["about"] = html2bbcode($value);
 194                         }
 195
 196                         $value = $xpath->evaluate('atom:author/poco:address/poco:formatted/text()', $context)->item(0)->nodeValue;
 197                         if ($value != "") {
 198                                 $contact["location"] = $value;
 199                         }
 200
 201                         $contact['name-date'] = datetime_convert();
 202
 203                         dba::update('contact', $contact, ['id' => $contact["id"]], $current);
 204
 205                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 206                                 logger("Update profile picture for contact ".$contact["id"], LOGGER_DEBUG);
 207                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
 208                         }
 209
 210                         // Ensure that we are having this contact (with uid=0)
 211                         $cid = Contact::getIdForURL($aliaslink, 0);
 212
 213                         if ($cid) {
 214                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 215                                 $old_contact = dba::selectFirst('contact', $fields, ['id' => $cid]);
 216
 217                                 // Update it with the current values
 218                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 219                                                 'nurl' => normalise_link($author["author-link"]),
 220                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 221                                                 'about' => $contact["about"], 'location' => $contact["location"],
 222                                                 'success_update' => datetime_convert(), 'last-update' => datetime_convert()];
 223
 224                                 dba::update('contact', $fields, ['id' => $cid], $old_contact);
 225
 226                                 // Update the avatar
 227                                 Contact::updateAvatar($author["author-avatar"], 0, $cid);
 228                         }
 229
 230                         $contact["generation"] = 2;
 231                         $contact["hide"] = false; // OStatus contacts are never hidden
 232                         $contact["photo"] = $author["author-avatar"];
 233                         $gcid = GContact::update($contact);
 234
 235                         GContact::link($gcid, $contact["uid"], $contact["id"]);
 236                 }
 237
 238                 return $author;
 239         }
 240
 241         /**
 242          * @brief Fetches author data from a given XML string
 243          *
 244          * @param string $xml      The XML
 245          * @param array  $importer user record of the importing user
 246          *
 247          * @return array Array of author related entries for the item
 248          */
 249         public static function salmonAuthor($xml, $importer)
 250         {
 251                 if ($xml == "") {
 252                         return;
 253                 }
 254
 255                 $doc = new DOMDocument();
 256                 @$doc->loadXML($xml);
 257
 258                 $xpath = new DOMXPath($doc);
 259                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 260                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 261                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 262                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 263                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 264                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 265                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 266                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 267
 268                 $entries = $xpath->query('/atom:entry');
 269
 270                 foreach ($entries as $entry) {
 271                         // fetch the author
 272                         $author = self::fetchAuthor($xpath, $entry, $importer, $contact, true);
 273                         return $author;
 274                 }
 275         }
 276
 277         /**
 278          * @brief Read attributes from element
 279          *
 280          * @param object $element Element object
 281          *
 282          * @return array attributes
 283          */
 284         private static function readAttributes($element)
 285         {
 286                 $attribute = [];
 287
 288                 foreach ($element->attributes as $attributes) {
 289                         $attribute[$attributes->name] = $attributes->textContent;
 290                 }
 291
 292                 return $attribute;
 293         }
 294
 295         /**
 296          * @brief Imports an XML string containing OStatus elements
 297          *
 298          * @param string $xml      The XML
 299          * @param array  $importer user record of the importing user
 300          * @param array  $contact  contact
 301          * @param string $hub      Called by reference, returns the fetched hub data
 302          * @return void
 303          */
 304         public static function import($xml, $importer, &$contact, &$hub)
 305         {
 306                 self::process($xml, $importer, $contact, $hub);
 307         }
 308
 309         /**
 310          * @brief Internal feed processing
 311          *
 312          * @param string  $xml        The XML
 313          * @param array   $importer   user record of the importing user
 314          * @param array   $contact    contact
 315          * @param string  $hub        Called by reference, returns the fetched hub data
 316          * @param boolean $stored     Is the post fresh imported or from the database?
 317          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 318          *
 319          * @return boolean Could the XML be processed?
 320          */
 321         private static function process($xml, $importer, &$contact, &$hub, $stored = false, $initialize = true)
 322         {
 323                 if ($initialize) {
 324                         self::$itemlist = [];
 325                         self::$conv_list = [];
 326                 }
 327
 328                 logger("Import OStatus message", LOGGER_DEBUG);
 329
 330                 if ($xml == "") {
 331                         return false;
 332                 }
 333                 $doc = new DOMDocument();
 334                 @$doc->loadXML($xml);
 335
 336                 $xpath = new DOMXPath($doc);
 337                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 338                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 339                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
 340                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
 341                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
 342                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
 343                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 344                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
 345
 346                 $hub = "";
 347                 $hub_attributes = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0)->attributes;
 348                 if (is_object($hub_attributes)) {
 349                         foreach ($hub_attributes as $hub_attribute) {
 350                                 if ($hub_attribute->name == "href") {
 351                                         $hub = $hub_attribute->textContent;
 352                                         logger("Found hub ".$hub, LOGGER_DEBUG);
 353                                 }
 354                         }
 355                 }
 356
 357                 $header = [];
 358                 $header["uid"] = $importer["uid"];
 359                 $header["network"] = NETWORK_OSTATUS;
 360                 $header["type"] = "remote";
 361                 $header["wall"] = 0;
 362                 $header["origin"] = 0;
 363                 $header["gravity"] = GRAVITY_PARENT;
 364
 365                 $first_child = $doc->firstChild->tagName;
 366
 367                 if ($first_child == "feed") {
 368                         $entries = $xpath->query('/atom:feed/atom:entry');
 369                 } else {
 370                         $entries = $xpath->query('/atom:entry');
 371                 }
 372
 373                 if ($entries->length == 1) {
 374                         // We reformat the XML to make it better readable
 375                         $doc2 = new DOMDocument();
 376                         $doc2->loadXML($xml);
 377                         $doc2->preserveWhiteSpace = false;
 378                         $doc2->formatOutput = true;
 379                         $xml2 = $doc2->saveXML();
 380
 381                         $header["protocol"] = PROTOCOL_OSTATUS_SALMON;
 382                         $header["source"] = $xml2;
 383                 } elseif (!$initialize) {
 384                         return false;
 385                 }
 386
 387                 // Fetch the first author
 388                 $authordata = $xpath->query('//author')->item(0);
 389                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 390
 391                 $entry = $xpath->query('/atom:entry');
 392
 393                 // Reverse the order of the entries
 394                 $entrylist = [];
 395
 396                 foreach ($entries as $entry) {
 397                         $entrylist[] = $entry;
 398                 }
 399
 400                 foreach (array_reverse($entrylist) as $entry) {
 401                         // fetch the author
 402                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 403
 404                         if ($authorelement->length == 0) {
 405                                 $authorelement = $xpath->query('atom:author', $entry);
 406                         }
 407
 408                         if ($authorelement->length > 0) {
 409                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 410                         }
 411
 412                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $entry)->item(0)->nodeValue;
 413                         if ($value != "") {
 414                                 $nickname = $value;
 415                         } else {
 416                                 $nickname = $author["author-name"];
 417                         }
 418
 419                         $item = array_merge($header, $author);
 420
 421                         $item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
 422
 423                         $item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
 424
 425                         // Delete a message
 426                         if (in_array($item["verb"], ['qvitter-delete-notice', ACTIVITY_DELETE, 'delete'])) {
 427                                 self::deleteNotice($item);
 428                                 continue;
 429                         }
 430
 431                         if (in_array($item["verb"], [NAMESPACE_OSTATUS."/unfavorite", ACTIVITY_UNFAVORITE])) {
 432                                 // Ignore "Unfavorite" message
 433                                 logger("Ignore unfavorite message ".print_r($item, true), LOGGER_DEBUG);
 434                                 continue;
 435                         }
 436
 437                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 438                         if (dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 439                                 logger('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 440                                 continue;
 441                         } else {
 442                                 logger('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 443                         }
 444
 445                         if ($item["verb"] == ACTIVITY_JOIN) {
 446                                 // ignore "Join" messages
 447                                 logger("Ignore join message ".print_r($item, true), LOGGER_DEBUG);
 448                                 continue;
 449                         }
 450
 451                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 452                                 // ignore mastodon "block" messages
 453                                 logger("Ignore block message ".print_r($item, true), LOGGER_DEBUG);
 454                                 continue;
 455                         }
 456
 457                         if ($item["verb"] == ACTIVITY_FOLLOW) {
 458                                 new_follower($importer, $contact, $item, $nickname);
 459                                 continue;
 460                         }
 461
 462                         if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
 463                                 lose_follower($importer, $contact, $item, $dummy);
 464                                 continue;
 465                         }
 466
 467                         if ($item["verb"] == ACTIVITY_FAVORITE) {
 468                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 469                                 logger("Favorite ".$orig_uri." ".print_r($item, true));
 470
 471                                 $item["verb"] = ACTIVITY_LIKE;
 472                                 $item["parent-uri"] = $orig_uri;
 473                                 $item["gravity"] = GRAVITY_LIKE;
 474                         }
 475
 476                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 477                         if (!in_array($item["verb"], [ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE])) {
 478                                 logger("Unhandled verb ".$item["verb"]." ".print_r($item, true), LOGGER_DEBUG);
 479                         }
 480
 481                         self::processPost($xpath, $entry, $item, $importer);
 482
 483                         if ($initialize && (count(self::$itemlist) > 0)) {
 484                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 485                                         // We will import it everytime, when it is started by our contacts
 486                                         $valid = !empty(self::$itemlist[0]['contact-id']);
 487                                         if (!$valid) {
 488                                                 // If not, then it depends on this setting
 489                                                 $valid = !Config::get('system', 'ostatus_full_threads');
 490                                         }
 491                                         if ($valid) {
 492                                                 // Never post a thread when the only interaction by our contact was a like
 493                                                 $valid = false;
 494                                                 $verbs = [ACTIVITY_POST, ACTIVITY_SHARE];
 495                                                 foreach (self::$itemlist as $item) {
 496                                                         if (!empty($item['contact-id']) && in_array($item['verb'], $verbs)) {
 497                                                                 $valid = true;
 498                                                         }
 499                                                 }
 500                                         }
 501                                 } else {
 502                                         // But we will only import complete threads
 503                                         $valid = dba::exists('item', ['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 504                                 }
 505
 506                                 if ($valid) {
 507                                         $default_contact = 0;
 508                                         $key = count(self::$itemlist);
 509                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 510                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 511                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 512                                                 } else {
 513                                                         $default_contact = $item['contact-id'];
 514                                                 }
 515                                         }
 516                                         foreach (self::$itemlist as $item) {
 517                                                 $found = dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 518                                                 if ($found) {
 519                                                         logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", LOGGER_DEBUG);
 520                                                 } elseif ($item['contact-id'] < 0) {
 521                                                         logger("Item with uri ".$item["uri"]." is from a blocked contact.", LOGGER_DEBUG);
 522                                                 } else {
 523                                                         // We are having duplicated entries. Hopefully this solves it.
 524                                                         if (Lock::set('ostatus_process_item_store')) {
 525                                                                 $ret = item_store($item);
 526                                                                 Lock::remove('ostatus_process_item_store');
 527                                                                 logger("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 528                                                         } else {
 529                                                                 $ret = item_store($item);
 530                                                                 logger("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
 531                                                         }
 532                                                 }
 533                                         }
 534                                 }
 535                                 self::$itemlist = [];
 536                         }
 537                         logger('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
 538                 }
 539                 return true;
 540         }
 541
 542         /**
 543          * @param object $item item
 544          * @return void
 545          */
 546         private static function deleteNotice($item)
 547         {
 548                 $condition = ['uid' => $item['uid'], 'author-link' => $item['author-link'], 'uri' => $item['uri']];
 549                 $deleted = dba::selectFirst('item', ['id', 'parent-uri'], $condition);
 550                 if (!DBM::is_result($deleted)) {
 551                         logger('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it. ");
 552                         return;
 553                 }
 554
 555                 // Currently we don't have a central deletion function that we could use in this case
 556                 // The function "item_drop" doesn't work for that case
 557                 dba::update(
 558                         'item',
 559                         ['deleted' => true, 'title' => '', 'body' => '',
 560                                         'edited' => datetime_convert(), 'changed' => datetime_convert()],
 561                         ['id' => $deleted["id"]]
 562                 );
 563
 564                 delete_thread($deleted["id"], $deleted["parent-uri"]);
 565
 566                 logger('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 567         }
 568
 569         /**
 570          * @brief Processes the XML for a post
 571          *
 572          * @param object $xpath    The xpath object
 573          * @param object $entry    The xml entry that is processed
 574          * @param array  $item     The item array
 575          * @param array  $importer user record of the importing user
 576          * @return void
 577          */
 578         private static function processPost($xpath, $entry, &$item, $importer)
 579         {
 580                 $item["body"] = html2bbcode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
 581                 $item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
 582                 if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
 583                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 584                         $item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 585                 } elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
 586                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
 587                 }
 588
 589                 $item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 590                 $item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 591                 $conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
 592                 $item['conversation-uri'] = $conversation;
 593
 594                 $conv = $xpath->query('ostatus:conversation', $entry);
 595                 if (is_object($conv->item(0))) {
 596                         foreach ($conv->item(0)->attributes as $attributes) {
 597                                 if ($attributes->name == "ref") {
 598                                         $item['conversation-uri'] = $attributes->textContent;
 599                                 }
 600                                 if ($attributes->name == "href") {
 601                                         $item['conversation-href'] = $attributes->textContent;
 602                                 }
 603                         }
 604                 }
 605
 606                 $related = "";
 607
 608                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 609                 if (is_object($inreplyto->item(0))) {
 610                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 611                                 if ($attributes->name == "ref") {
 612                                         $item["parent-uri"] = $attributes->textContent;
 613                                 }
 614                                 if ($attributes->name == "href") {
 615                                         $related = $attributes->textContent;
 616                                 }
 617                         }
 618                 }
 619
 620                 $georsspoint = $xpath->query('georss:point', $entry);
 621                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 622                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 623                 }
 624
 625                 $categories = $xpath->query('atom:category', $entry);
 626                 if ($categories) {
 627                         foreach ($categories as $category) {
 628                                 foreach ($category->attributes as $attributes) {
 629                                         if ($attributes->name == "term") {
 630                                                 $term = $attributes->textContent;
 631                                                 if (strlen($item["tag"])) {
 632                                                         $item["tag"] .= ',';
 633                                                 }
 634                                                 $item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
 635                                         }
 636                                 }
 637                         }
 638                 }
 639
 640                 $self = '';
 641                 $add_body = '';
 642
 643                 $links = $xpath->query('atom:link', $entry);
 644                 if ($links) {
 645                         $link_data = self::processLinks($links, $item);
 646                         $self = $link_data['self'];
 647                         $add_body = $link_data['add_body'];
 648                 }
 649
 650                 $repeat_of = "";
 651
 652                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 653                 if ($notice_info && ($notice_info->length > 0)) {
 654                         foreach ($notice_info->item(0)->attributes as $attributes) {
 655                                 if ($attributes->name == "source") {
 656                                         $item["app"] = strip_tags($attributes->textContent);
 657                                 }
 658                                 if ($attributes->name == "repeat_of") {
 659                                         $repeat_of = $attributes->textContent;
 660                                 }
 661                         }
 662                 }
 663                 // Is it a repeated post?
 664                 if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
 665                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 666                         if (!empty($link_data['add_body'])) {
 667                                 $add_body .= $link_data['add_body'];
 668                         }
 669                 }
 670
 671                 $item["body"] .= $add_body;
 672
 673                 // Only add additional data when there is no picture in the post
 674                 if (!strstr($item["body"], '[/img]')) {
 675                         $item["body"] = add_page_info_to_body($item["body"]);
 676                 }
 677
 678                 // Mastodon Content Warning
 679                 if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 680                         $clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
 681
 682                         $item["body"] = html2bbcode($clear_text) . '[spoiler]' . $item["body"] . '[/spoiler]';
 683                 }
 684
 685                 if (($self != '') && empty($item['protocol'])) {
 686                         self::fetchSelf($self, $item);
 687                 }
 688
 689                 if (!empty($item["conversation-href"])) {
 690                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 691                 }
 692
 693                 if (isset($item["parent-uri"]) && ($related != '')) {
 694                         if (!dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 695                                 self::fetchRelated($related, $item["parent-uri"], $importer);
 696                         } else {
 697                                 logger('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
 698                         }
 699
 700                         $item["type"] = 'remote-comment';
 701                         $item["gravity"] = GRAVITY_COMMENT;
 702                 } else {
 703                         $item["parent-uri"] = $item["uri"];
 704                 }
 705
 706                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 707                         $item = Conversation::insert($item);
 708                 }
 709
 710                 self::$itemlist[] = $item;
 711         }
 712
 713         /**
 714          * @brief Fetch the conversation for posts
 715          *
 716          * @param string $conversation     The link to the conversation
 717          * @param string $conversation_uri The conversation in "uri" format
 718          * @return void
 719          */
 720         private static function fetchConversation($conversation, $conversation_uri)
 721         {
 722                 // Ensure that we only store a conversation once in a process
 723                 if (isset(self::$conv_list[$conversation])) {
 724                         return;
 725                 }
 726
 727                 self::$conv_list[$conversation] = true;
 728
 729                 $conversation_data = Network::zFetchURL($conversation, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 730
 731                 if (!$conversation_data['success']) {
 732                         return;
 733                 }
 734
 735                 $xml = '';
 736
 737                 if (stristr($conversation_data['header'], 'Content-Type: application/atom+xml')) {
 738                         $xml = $conversation_data['body'];
 739                 }
 740
 741                 if ($xml == '') {
 742                         $doc = new DOMDocument();
 743                         if (!@$doc->loadHTML($conversation_data['body'])) {
 744                                 return;
 745                         }
 746                         $xpath = new DOMXPath($doc);
 747
 748                         $links = $xpath->query('//link');
 749                         if ($links) {
 750                                 foreach ($links as $link) {
 751                                         $attribute = self::readAttributes($link);
 752                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 753                                                 $file = $attribute['href'];
 754                                         }
 755                                 }
 756                                 if ($file != '') {
 757                                         $conversation_atom = Network::zFetchURL($attribute['href']);
 758
 759                                         if ($conversation_atom['success']) {
 760                                                 $xml = $conversation_atom['body'];
 761                                         }
 762                                 }
 763                         }
 764                 }
 765
 766                 if ($xml == '') {
 767                         return;
 768                 }
 769
 770                 self::storeConversation($xml, $conversation, $conversation_uri);
 771         }
 772
 773         /**
 774          * @brief Store a feed in several conversation entries
 775          *
 776          * @param string $xml              The feed
 777          * @param string $conversation     conversation
 778          * @param string $conversation_uri conversation uri
 779          * @return void
 780          */
 781         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 782         {
 783                 $doc = new DOMDocument();
 784                 @$doc->loadXML($xml);
 785
 786                 $xpath = new DOMXPath($doc);
 787                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
 788                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
 789                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
 790
 791                 $entries = $xpath->query('/atom:feed/atom:entry');
 792
 793                 // Now store the entries
 794                 foreach ($entries as $entry) {
 795                         $doc2 = new DOMDocument();
 796                         $doc2->preserveWhiteSpace = false;
 797                         $doc2->formatOutput = true;
 798
 799                         $conv_data = [];
 800
 801                         $conv_data['protocol'] = PROTOCOL_SPLITTED_CONV;
 802                         $conv_data['network'] = NETWORK_OSTATUS;
 803                         $conv_data['uri'] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
 804
 805                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 806                         if (is_object($inreplyto->item(0))) {
 807                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 808                                         if ($attributes->name == "ref") {
 809                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 810                                         }
 811                                 }
 812                         }
 813
 814                         $conv = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
 815                         $conv_data['conversation-uri'] = $conv;
 816
 817                         $conv = $xpath->query('ostatus:conversation', $entry);
 818                         if (is_object($conv->item(0))) {
 819                                 foreach ($conv->item(0)->attributes as $attributes) {
 820                                         if ($attributes->name == "ref") {
 821                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 822                                         }
 823                                         if ($attributes->name == "href") {
 824                                                 $conv_data['conversation-href'] = $attributes->textContent;
 825                                         }
 826                                 }
 827                         }
 828
 829                         if ($conversation != '') {
 830                                 $conv_data['conversation-uri'] = $conversation;
 831                         }
 832
 833                         if ($conversation_uri != '') {
 834                                 $conv_data['conversation-uri'] = $conversation_uri;
 835                         }
 836
 837                         $entry = $doc2->importNode($entry, true);
 838
 839                         $doc2->appendChild($entry);
 840
 841                         $conv_data['source'] = $doc2->saveXML();
 842
 843                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => PROTOCOL_OSTATUS_FEED];
 844                         if (dba::exists('conversation', $condition)) {
 845                                 logger('Delete deprecated entry for URI '.$conv_data['uri'], LOGGER_DEBUG);
 846                                 dba::delete('conversation', ['item-uri' => $conv_data['uri']]);
 847                         }
 848
 849                         logger('Store conversation data for uri '.$conv_data['uri'], LOGGER_DEBUG);
 850                         Conversation::insert($conv_data);
 851                 }
 852         }
 853
 854         /**
 855          * @brief Fetch the own post so that it can be stored later
 856          *
 857          * We want to store the original data for later processing.
 858          * This function is meant for cases where we process a feed with multiple entries.
 859          * In that case we need to fetch the single posts here.
 860          *
 861          * @param string $self The link to the self item
 862          * @param array  $item The item array
 863          * @return void
 864          */
 865         private static function fetchSelf($self, &$item)
 866         {
 867                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 868                 if (dba::exists('conversation', $condition)) {
 869                         logger('Conversation '.$item['uri'].' is already stored.', LOGGER_DEBUG);
 870                         return;
 871                 }
 872
 873                 $self_data = Network::zFetchURL($self);
 874
 875                 if (!$self_data['success']) {
 876                         return;
 877                 }
 878
 879                 // We reformat the XML to make it better readable
 880                 $doc = new DOMDocument();
 881                 $doc->loadXML($self_data['body']);
 882                 $doc->preserveWhiteSpace = false;
 883                 $doc->formatOutput = true;
 884                 $xml = $doc->saveXML();
 885
 886                 $item["protocol"] = PROTOCOL_OSTATUS_SALMON;
 887                 $item["source"] = $xml;
 888
 889                 logger('Conversation '.$item['uri'].' is now fetched.', LOGGER_DEBUG);
 890         }
 891
 892         /**
 893          * @brief Fetch related posts and processes them
 894          *
 895          * @param string $related     The link to the related item
 896          * @param string $related_uri The related item in "uri" format
 897          * @param array  $importer    user record of the importing user
 898          * @return void
 899          */
 900         private static function fetchRelated($related, $related_uri, $importer)
 901         {
 902                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
 903                 $conversation = dba::selectFirst('conversation', ['source', 'protocol'], $condition);
 904                 if (DBM::is_result($conversation)) {
 905                         $stored = true;
 906                         $xml = $conversation['source'];
 907                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 908                                 logger('Got valid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 909                                 return;
 910                         }
 911                         if ($conversation['protocol'] == PROTOCOL_OSTATUS_SALMON) {
 912                                 logger('Delete invalid cached XML for URI '.$related_uri, LOGGER_DEBUG);
 913                                 dba::delete('conversation', ['item-uri' => $related_uri]);
 914                         }
 915                 }
 916
 917                 $stored = false;
 918                 $related_data = Network::zFetchURL($related, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
 919
 920                 if (!$related_data['success']) {
 921                         return;
 922                 }
 923
 924                 $xml = '';
 925
 926                 if (stristr($related_data['header'], 'Content-Type: application/atom+xml')) {
 927                         logger('Directly fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 928                         $xml = $related_data['body'];
 929                 }
 930
 931                 if ($xml == '') {
 932                         $doc = new DOMDocument();
 933                         if (!@$doc->loadHTML($related_data['body'])) {
 934                                 return;
 935                         }
 936                         $xpath = new DOMXPath($doc);
 937
 938                         $atom_file = '';
 939
 940                         $links = $xpath->query('//link');
 941                         if ($links) {
 942                                 foreach ($links as $link) {
 943                                         $attribute = self::readAttributes($link);
 944                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 945                                                 $atom_file = $attribute['href'];
 946                                         }
 947                                 }
 948                                 if ($atom_file != '') {
 949                                         $related_atom = Network::zFetchURL($atom_file);
 950
 951                                         if ($related_atom['success']) {
 952                                                 logger('Fetched XML for URI '.$related_uri, LOGGER_DEBUG);
 953                                                 $xml = $related_atom['body'];
 954                                         }
 955                                 }
 956                         }
 957                 }
 958
 959                 // Workaround for older GNU Social servers
 960                 if (($xml == '') && strstr($related, '/notice/')) {
 961                         $related_atom = Network::zFetchURL(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
 962
 963                         if ($related_atom['success']) {
 964                                 logger('GNU Social workaround to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 965                                 $xml = $related_atom['body'];
 966                         }
 967                 }
 968
 969                 // Even more worse workaround for GNU Social ;-)
 970                 if ($xml == '') {
 971                         $related_guess = OStatus::convertHref($related_uri);
 972                         $related_atom = Network::zFetchURL(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
 973
 974                         if ($related_atom['success']) {
 975                                 logger('GNU Social workaround 2 to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
 976                                 $xml = $related_atom['body'];
 977                         }
 978                 }
 979
 980                 // Finally we take the data that we fetched from "ostatus:conversation"
 981                 if ($xml == '') {
 982                         $condition = ['item-uri' => $related_uri, 'protocol' => PROTOCOL_SPLITTED_CONV];
 983                         $conversation = dba::selectFirst('conversation', ['source'], $condition);
 984                         if (DBM::is_result($conversation)) {
 985                                 $stored = true;
 986                                 logger('Got cached XML from conversation for URI '.$related_uri, LOGGER_DEBUG);
 987                                 $xml = $conversation['source'];
 988                         }
 989                 }
 990
 991                 if ($xml != '') {
 992                         self::process($xml, $importer, $contact, $hub, $stored, false);
 993                 } else {
 994                         logger("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, LOGGER_DEBUG);
 995                 }
 996                 return;
 997         }
 998
 999         /**
1000          * @brief Processes the XML for a repeated post
1001          *
1002          * @param object $xpath    The xpath object
1003          * @param object $entry    The xml entry that is processed
1004          * @param array  $item     The item array
1005          * @param array  $importer user record of the importing user
1006          *
1007          * @return array with data from links
1008          */
1009         private static function processRepeatedItem($xpath, $entry, &$item, $importer)
1010         {
1011                 $activityobjects = $xpath->query('activity:object', $entry)->item(0);
1012
1013                 if (!is_object($activityobjects)) {
1014                         return [];
1015                 }
1016
1017                 $link_data = [];
1018
1019                 $orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
1020
1021                 $links = $xpath->query("atom:link", $activityobjects);
1022                 if ($links) {
1023                         $link_data = self::processLinks($links, $item);
1024                 }
1025
1026                 $orig_body = $xpath->query('atom:content/text()', $activityobjects)->item(0)->nodeValue;
1027                 $orig_created = $xpath->query('atom:published/text()', $activityobjects)->item(0)->nodeValue;
1028                 $orig_edited = $xpath->query('atom:updated/text()', $activityobjects)->item(0)->nodeValue;
1029
1030                 $orig_author = self::fetchAuthor($xpath, $activityobjects, $importer, $dummy, false);
1031
1032                 $item["author-name"] = $orig_author["author-name"];
1033                 $item["author-link"] = $orig_author["author-link"];
1034                 $item["author-avatar"] = $orig_author["author-avatar"];
1035
1036                 $item["body"] = html2bbcode($orig_body);
1037                 $item["created"] = $orig_created;
1038                 $item["edited"] = $orig_edited;
1039
1040                 $item["uri"] = $orig_uri;
1041
1042                 $item["verb"] = $xpath->query('activity:verb/text()', $activityobjects)->item(0)->nodeValue;
1043
1044                 $item["object-type"] = $xpath->query('activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
1045
1046                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobjects);
1047                 if (is_object($inreplyto->item(0))) {
1048                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1049                                 if ($attributes->name == "ref") {
1050                                         $item["parent-uri"] = $attributes->textContent;
1051                                 }
1052                         }
1053                 }
1054
1055                 return $link_data;
1056         }
1057
1058         /**
1059          * @brief Processes links in the XML
1060          *
1061          * @param object $links The xml data that contain links
1062          * @param array  $item  The item array
1063          *
1064          * @return array with data from the links
1065          */
1066         private static function processLinks($links, &$item)
1067         {
1068                 $link_data = ['add_body' => '', 'self' => ''];
1069
1070                 foreach ($links as $link) {
1071                         $attribute = self::readAttributes($link);
1072
1073                         if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
1074                                 switch ($attribute['rel']) {
1075                                         case "alternate":
1076                                                 $item["plink"] = $attribute['href'];
1077                                                 if (($item["object-type"] == ACTIVITY_OBJ_QUESTION)
1078                                                         || ($item["object-type"] == ACTIVITY_OBJ_EVENT)
1079                                                 ) {
1080                                                         $item["body"] .= add_page_info($attribute['href']);
1081                                                 }
1082                                                 break;
1083                                         case "ostatus:conversation":
1084                                                 $link_data['conversation'] = $attribute['href'];
1085                                                 $item['conversation-href'] = $link_data['conversation'];
1086                                                 if (!isset($item['conversation-uri'])) {
1087                                                         $item['conversation-uri'] = $item['conversation-href'];
1088                                                 }
1089                                                 break;
1090                                         case "enclosure":
1091                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1092                                                 if ($filetype == 'image') {
1093                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1094                                                 } else {
1095                                                         if (strlen($item["attach"])) {
1096                                                                 $item["attach"] .= ',';
1097                                                         }
1098                                                         if (!isset($attribute['length'])) {
1099                                                                 $attribute['length'] = "0";
1100                                                         }
1101                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
1102                                                 }
1103                                                 break;
1104                                         case "related":
1105                                                 if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
1106                                                         if (!isset($item["parent-uri"])) {
1107                                                                 $item["parent-uri"] = $attribute['href'];
1108                                                         }
1109                                                         $link_data['related'] = $attribute['href'];
1110                                                 } else {
1111                                                         $item["body"] .= add_page_info($attribute['href']);
1112                                                 }
1113                                                 break;
1114                                         case "self":
1115                                                 if ($item["plink"] == '') {
1116                                                         $item["plink"] = $attribute['href'];
1117                                                 }
1118                                                 $link_data['self'] = $attribute['href'];
1119                                                 break;
1120                                 }
1121                         }
1122                 }
1123                 return $link_data;
1124         }
1125
1126         /**
1127          * @brief Create an url out of an uri
1128          *
1129          * @param string $href URI in the format "parameter1:parameter1:..."
1130          *
1131          * @return string URL in the format http(s)://....
1132          */
1133         public static function convertHref($href)
1134         {
1135                 $elements = explode(":", $href);
1136
1137                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1138                         return $href;
1139                 }
1140
1141                 $server = explode(",", $elements[1]);
1142                 $conversation = explode("=", $elements[2]);
1143
1144                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1145                         return "http://".$server[0]."/notice/".$elements[3];
1146                 }
1147
1148                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1149                         return $href;
1150                 }
1151                 if ($elements[3] == "objectType=thread") {
1152                         return "http://".$server[0]."/conversation/".$conversation[1];
1153                 } else {
1154                         return "http://".$server[0]."/notice/".$conversation[1];
1155                 }
1156                 return $href;
1157         }
1158
1159         /**
1160          * @brief Checks if the current post is a reshare
1161          *
1162          * @param array $item The item array of thw post
1163          *
1164          * @return string The guid if the post is a reshare
1165          */
1166         private static function getResharedGuid($item)
1167         {
1168                 $body = trim($item["body"]);
1169
1170                 // Skip if it isn't a pure repeated messages
1171                 // Does it start with a share?
1172                 if (strpos($body, "[share") > 0) {
1173                         return "";
1174                 }
1175
1176                 // Does it end with a share?
1177                 if (strlen($body) > (strrpos($body, "[/share]") + 8)) {
1178                         return "";
1179                 }
1180
1181                 $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "$1", $body);
1182                 // Skip if there is no shared message in there
1183                 if ($body == $attributes) {
1184                         return false;
1185                 }
1186
1187                 $guid = "";
1188                 preg_match("/guid='(.*?)'/ism", $attributes, $matches);
1189                 if ($matches[1] != "") {
1190                         $guid = $matches[1];
1191                 }
1192
1193                 preg_match('/guid="(.*?)"/ism', $attributes, $matches);
1194                 if ($matches[1] != "") {
1195                         $guid = $matches[1];
1196                 }
1197
1198                 return $guid;
1199         }
1200
1201         /**
1202          * @brief Cleans the body of a post if it contains picture links
1203          *
1204          * @param string $body The body
1205          *
1206          * @return string The cleaned body
1207          */
1208         private static function formatPicturePost($body)
1209         {
1210                 $siteinfo = BBCode::getAttachedData($body);
1211
1212                 if (($siteinfo["type"] == "photo")) {
1213                         if (isset($siteinfo["preview"])) {
1214                                 $preview = $siteinfo["preview"];
1215                         } else {
1216                                 $preview = $siteinfo["image"];
1217                         }
1218
1219                         // Is it a remote picture? Then make a smaller preview here
1220                         $preview = proxy_url($preview, false, PROXY_SIZE_SMALL);
1221
1222                         // Is it a local picture? Then make it smaller here
1223                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1224                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1225
1226                         if (isset($siteinfo["url"])) {
1227                                 $url = $siteinfo["url"];
1228                         } else {
1229                                 $url = $siteinfo["image"];
1230                         }
1231
1232                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1233                 }
1234
1235                 return $body;
1236         }
1237
1238         /**
1239          * @brief Adds the header elements to the XML document
1240          *
1241          * @param object $doc    XML document
1242          * @param array  $owner  Contact data of the poster
1243          * @param string $filter The related feed filter (activity, posts or comments)
1244          *
1245          * @return object header root element
1246          */
1247         private static function addHeader($doc, $owner, $filter)
1248         {
1249                 $a = get_app();
1250
1251                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
1252                 $doc->appendChild($root);
1253
1254                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1255                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1256                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1257                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1258                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
1259                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1260                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1261                 $root->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1262
1263                 switch ($filter) {
1264                         case 'activity': $title = L10n::t('%s\'s timeline', $owner['name']); break;
1265                         case 'posts'   : $title = L10n::t('%s\'s posts'   , $owner['name']); break;
1266                         case 'comments': $title = L10n::t('%s\'s comments', $owner['name']); break;
1267                 }
1268
1269                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1270                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1271                 XML::addElement($doc, $root, "id", System::baseUrl() . "/profile/" . $owner["nick"]);
1272                 XML::addElement($doc, $root, "title", $title);
1273                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], $a->config["sitename"]));
1274                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1275                 XML::addElement($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
1276
1277                 $author = self::addAuthor($doc, $owner);
1278                 $root->appendChild($author);
1279
1280                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1281                 XML::addElement($doc, $root, "link", "", $attributes);
1282
1283                 /// @TODO We have to find out what this is
1284                 /// $attributes = array("href" => System::baseUrl()."/sup",
1285                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1286                 ///             "type" => "application/json");
1287                 /// XML::addElement($doc, $root, "link", "", $attributes);
1288
1289                 self::hublinks($doc, $root, $owner["nick"]);
1290
1291                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1292                 XML::addElement($doc, $root, "link", "", $attributes);
1293
1294                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1295                 XML::addElement($doc, $root, "link", "", $attributes);
1296
1297                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1298                 XML::addElement($doc, $root, "link", "", $attributes);
1299
1300                 $attributes = ["href" => System::baseUrl() . "/api/statuses/user_timeline/" . $owner["nick"] . ".atom",
1301                         "rel" => "self", "type" => "application/atom+xml"];
1302                 XML::addElement($doc, $root, "link", "", $attributes);
1303
1304                 return $root;
1305         }
1306
1307         /**
1308          * @brief Add the link to the push hubs to the XML document
1309          *
1310          * @param object $doc  XML document
1311          * @param object $root XML root element where the hub links are added
1312          * @param object $nick nick
1313          * @return void
1314          */
1315         public static function hublinks($doc, $root, $nick)
1316         {
1317                 $h = System::baseUrl() . '/pubsubhubbub/'.$nick;
1318                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1319         }
1320
1321         /**
1322          * @brief Adds attachement data to the XML document
1323          *
1324          * @param object $doc  XML document
1325          * @param object $root XML root element where the hub links are added
1326          * @param array  $item Data of the item that is to be posted
1327          * @return void
1328          */
1329         private static function getAttachment($doc, $root, $item)
1330         {
1331                 $o = "";
1332                 $siteinfo = BBCode::getAttachedData($item["body"]);
1333
1334                 switch ($siteinfo["type"]) {
1335                         case 'photo':
1336                                 $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1337                                 $attributes = ["rel" => "enclosure",
1338                                                 "href" => $siteinfo["image"],
1339                                                 "type" => $imgdata["mime"],
1340                                                 "length" => intval($imgdata["size"])];
1341                                 XML::addElement($doc, $root, "link", "", $attributes);
1342                                 break;
1343                         case 'video':
1344                                 $attributes = ["rel" => "enclosure",
1345                                                 "href" => $siteinfo["url"],
1346                                                 "type" => "text/html; charset=UTF-8",
1347                                                 "length" => "",
1348                                                 "title" => $siteinfo["title"]];
1349                                 XML::addElement($doc, $root, "link", "", $attributes);
1350                                 break;
1351                         default:
1352                                 break;
1353                 }
1354
1355                 if (!Config::get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1356                         $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1357                         $attributes = ["rel" => "enclosure",
1358                                         "href" => $siteinfo["image"],
1359                                         "type" => $imgdata["mime"],
1360                                         "length" => intval($imgdata["size"])];
1361
1362                         XML::addElement($doc, $root, "link", "", $attributes);
1363                 }
1364
1365                 $arr = explode('[/attach],', $item['attach']);
1366                 if (count($arr)) {
1367                         foreach ($arr as $r) {
1368                                 $matches = false;
1369                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1370                                 if ($cnt) {
1371                                         $attributes = ["rel" => "enclosure",
1372                                                         "href" => $matches[1],
1373                                                         "type" => $matches[3]];
1374
1375                                         if (intval($matches[2])) {
1376                                                 $attributes["length"] = intval($matches[2]);
1377                                         }
1378                                         if (trim($matches[4]) != "") {
1379                                                 $attributes["title"] = trim($matches[4]);
1380                                         }
1381                                         XML::addElement($doc, $root, "link", "", $attributes);
1382                                 }
1383                         }
1384                 }
1385         }
1386
1387         /**
1388          * @brief Adds the author element to the XML document
1389          *
1390          * @param object $doc   XML document
1391          * @param array  $owner Contact data of the poster
1392          *
1393          * @return object author element
1394          */
1395         private static function addAuthor($doc, $owner)
1396         {
1397                 $r = q("SELECT `homepage`, `publish` FROM `profile` WHERE `uid` = %d AND `is-default` LIMIT 1", intval($owner["uid"]));
1398                 if (DBM::is_result($r)) {
1399                         $profile = $r[0];
1400                 }
1401                 $author = $doc->createElement("author");
1402                 XML::addElement($doc, $author, "id", $owner["url"]);
1403                 XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_PERSON);
1404                 XML::addElement($doc, $author, "uri", $owner["url"]);
1405                 XML::addElement($doc, $author, "name", $owner["nick"]);
1406                 XML::addElement($doc, $author, "email", $owner["addr"]);
1407                 XML::addElement($doc, $author, "summary", bbcode($owner["about"], false, false, 7));
1408
1409                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1410                 XML::addElement($doc, $author, "link", "", $attributes);
1411
1412                 $attributes = [
1413                                 "rel" => "avatar",
1414                                 "type" => "image/jpeg", // To-Do?
1415                                 "media:width" => 175,
1416                                 "media:height" => 175,
1417                                 "href" => $owner["photo"]];
1418                 XML::addElement($doc, $author, "link", "", $attributes);
1419
1420                 if (isset($owner["thumb"])) {
1421                         $attributes = [
1422                                         "rel" => "avatar",
1423                                         "type" => "image/jpeg", // To-Do?
1424                                         "media:width" => 80,
1425                                         "media:height" => 80,
1426                                         "href" => $owner["thumb"]];
1427                         XML::addElement($doc, $author, "link", "", $attributes);
1428                 }
1429
1430                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1431                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1432                 XML::addElement($doc, $author, "poco:note", bbcode($owner["about"], false, false, 7));
1433
1434                 if (trim($owner["location"]) != "") {
1435                         $element = $doc->createElement("poco:address");
1436                         XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1437                         $author->appendChild($element);
1438                 }
1439
1440                 if (trim($profile["homepage"]) != "") {
1441                         $urls = $doc->createElement("poco:urls");
1442                         XML::addElement($doc, $urls, "poco:type", "homepage");
1443                         XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1444                         XML::addElement($doc, $urls, "poco:primary", "true");
1445                         $author->appendChild($urls);
1446                 }
1447
1448                 if (count($profile)) {
1449                         XML::addElement($doc, $author, "followers", "", ["url" => System::baseUrl()."/viewcontacts/".$owner["nick"]]);
1450                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1451                 }
1452
1453                 if ($profile["publish"]) {
1454                         XML::addElement($doc, $author, "mastodon:scope", "public");
1455                 }
1456                 return $author;
1457         }
1458
1459         /**
1460          * @TODO Picture attachments should look like this:
1461          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1462          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1463          */
1464
1465         /**
1466          * @brief Returns the given activity if present - otherwise returns the "post" activity
1467          *
1468          * @param array $item Data of the item that is to be posted
1469          *
1470          * @return string activity
1471          */
1472         private static function constructVerb($item)
1473         {
1474                 if ($item['verb']) {
1475                         return $item['verb'];
1476                 }
1477
1478                 return ACTIVITY_POST;
1479         }
1480
1481         /**
1482          * @brief Returns the given object type if present - otherwise returns the "note" object type
1483          *
1484          * @param array $item Data of the item that is to be posted
1485          *
1486          * @return string Object type
1487          */
1488         private static function constructObjecttype($item)
1489         {
1490                 if (in_array($item['object-type'], [ACTIVITY_OBJ_NOTE, ACTIVITY_OBJ_COMMENT]))
1491                         return $item['object-type'];
1492                 return ACTIVITY_OBJ_NOTE;
1493         }
1494
1495         /**
1496          * @brief Adds an entry element to the XML document
1497          *
1498          * @param object $doc      XML document
1499          * @param array  $item     Data of the item that is to be posted
1500          * @param array  $owner    Contact data of the poster
1501          * @param bool   $toplevel optional default false
1502          *
1503          * @return object Entry element
1504          */
1505         private static function entry($doc, $item, $owner, $toplevel = false)
1506         {
1507                 $repeated_guid = self::getResharedGuid($item);
1508                 if ($repeated_guid != "") {
1509                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1510                 }
1511
1512                 if ($xml) {
1513                         return $xml;
1514                 }
1515
1516                 if ($item["verb"] == ACTIVITY_LIKE) {
1517                         return self::likeEntry($doc, $item, $owner, $toplevel);
1518                 } elseif (in_array($item["verb"], [ACTIVITY_FOLLOW, NAMESPACE_OSTATUS."/unfollow"])) {
1519                         return self::followEntry($doc, $item, $owner, $toplevel);
1520                 } else {
1521                         return self::noteEntry($doc, $item, $owner, $toplevel);
1522                 }
1523         }
1524
1525         /**
1526          * @brief Adds a source entry to the XML document
1527          *
1528          * @param object $doc     XML document
1529          * @param array  $contact Array of the contact that is added
1530          *
1531          * @return object Source element
1532          */
1533         private static function sourceEntry($doc, $contact)
1534         {
1535                 $source = $doc->createElement("source");
1536                 XML::addElement($doc, $source, "id", $contact["poll"]);
1537                 XML::addElement($doc, $source, "title", $contact["name"]);
1538                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1539                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1540                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1541                 XML::addElement($doc, $source, "updated", datetime_convert("UTC", "UTC", $contact["success_update"]."+00:00", ATOM_TIME));
1542
1543                 return $source;
1544         }
1545
1546         /**
1547          * @brief Fetches contact data from the contact or the gcontact table
1548          *
1549          * @param string $url   URL of the contact
1550          * @param array  $owner Contact data of the poster
1551          *
1552          * @return array Contact array
1553          */
1554         private static function contactEntry($url, $owner)
1555         {
1556                 $r = q(
1557                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1558                         dbesc(normalise_link($url)),
1559                         intval($owner["uid"])
1560                 );
1561                 if (DBM::is_result($r)) {
1562                         $contact = $r[0];
1563                         $contact["uid"] = -1;
1564                 }
1565
1566                 if (!DBM::is_result($r)) {
1567                         $r = q(
1568                                 "SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
1569                                 dbesc(normalise_link($url))
1570                         );
1571                         if (DBM::is_result($r)) {
1572                                 $contact = $r[0];
1573                                 $contact["uid"] = -1;
1574                                 $contact["success_update"] = $contact["updated"];
1575                         }
1576                 }
1577
1578                 if (!DBM::is_result($r)) {
1579                         $contact = owner;
1580                 }
1581
1582                 if (!isset($contact["poll"])) {
1583                         $data = Probe::uri($url);
1584                         $contact["poll"] = $data["poll"];
1585
1586                         if (!$contact["alias"]) {
1587                                 $contact["alias"] = $data["alias"];
1588                         }
1589                 }
1590
1591                 if (!isset($contact["alias"])) {
1592                         $contact["alias"] = $contact["url"];
1593                 }
1594
1595                 return $contact;
1596         }
1597
1598         /**
1599          * @brief Adds an entry element with reshared content
1600          *
1601          * @param object $doc           XML document
1602          * @param array  $item          Data of the item that is to be posted
1603          * @param array  $owner         Contact data of the poster
1604          * @param string $repeated_guid guid
1605          * @param bool   $toplevel      Is it for en entry element (false) or a feed entry (true)?
1606          *
1607          * @return object Entry element
1608          */
1609         private static function reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel)
1610         {
1611                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1612                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1613                 }
1614
1615                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1616
1617                 $r = q(
1618                         "SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' AND NOT `private` AND `network` IN ('%s', '%s', '%s') LIMIT 1",
1619                         intval($owner["uid"]),
1620                         dbesc($repeated_guid),
1621                         dbesc(NETWORK_DFRN),
1622                         dbesc(NETWORK_DIASPORA),
1623                         dbesc(NETWORK_OSTATUS)
1624                 );
1625                 if (DBM::is_result($r)) {
1626                         $repeated_item = $r[0];
1627                 } else {
1628                         return false;
1629                 }
1630                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1631
1632                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1633
1634                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1635
1636                 self::entryContent($doc, $entry, $item, $owner, $title, ACTIVITY_SHARE, false);
1637
1638                 $as_object = $doc->createElement("activity:object");
1639
1640                 XML::addElement($doc, $as_object, "activity:object-type", NAMESPACE_ACTIVITY_SCHEMA."activity");
1641
1642                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1643
1644                 $author = self::addAuthor($doc, $contact);
1645                 $as_object->appendChild($author);
1646
1647                 $as_object2 = $doc->createElement("activity:object");
1648
1649                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1650
1651                 $title = sprintf("New comment by %s", $contact["nick"]);
1652
1653                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1654
1655                 $as_object->appendChild($as_object2);
1656
1657                 self::entryFooter($doc, $as_object, $item, $owner, false);
1658
1659                 $source = self::sourceEntry($doc, $contact);
1660
1661                 $as_object->appendChild($source);
1662
1663                 $entry->appendChild($as_object);
1664
1665                 self::entryFooter($doc, $entry, $item, $owner);
1666
1667                 return $entry;
1668         }
1669
1670         /**
1671          * @brief Adds an entry element with a "like"
1672          *
1673          * @param object $doc      XML document
1674          * @param array  $item     Data of the item that is to be posted
1675          * @param array  $owner    Contact data of the poster
1676          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1677          *
1678          * @return object Entry element with "like"
1679          */
1680         private static function likeEntry($doc, $item, $owner, $toplevel)
1681         {
1682                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1683                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1684                 }
1685
1686                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1687
1688                 $verb = NAMESPACE_ACTIVITY_SCHEMA."favorite";
1689                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1690
1691                 $as_object = $doc->createElement("activity:object");
1692
1693                 $parent = q(
1694                         "SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
1695                         dbesc($item["thr-parent"]),
1696                         intval($item["uid"])
1697                 );
1698                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1699
1700                 XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent[0]));
1701
1702                 self::entryContent($doc, $as_object, $parent[0], $owner, "New entry");
1703
1704                 $entry->appendChild($as_object);
1705
1706                 self::entryFooter($doc, $entry, $item, $owner);
1707
1708                 return $entry;
1709         }
1710
1711         /**
1712          * @brief Adds the person object element to the XML document
1713          *
1714          * @param object $doc     XML document
1715          * @param array  $owner   Contact data of the poster
1716          * @param array  $contact Contact data of the target
1717          *
1718          * @return object author element
1719          */
1720         private static function addPersonObject($doc, $owner, $contact)
1721         {
1722                 $object = $doc->createElement("activity:object");
1723                 XML::addElement($doc, $object, "activity:object-type", ACTIVITY_OBJ_PERSON);
1724
1725                 if ($contact['network'] == NETWORK_PHANTOM) {
1726                         XML::addElement($doc, $object, "id", $contact['url']);
1727                         return $object;
1728                 }
1729
1730                 XML::addElement($doc, $object, "id", $contact["alias"]);
1731                 XML::addElement($doc, $object, "title", $contact["nick"]);
1732
1733                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1734                 XML::addElement($doc, $object, "link", "", $attributes);
1735
1736                 $attributes = [
1737                                 "rel" => "avatar",
1738                                 "type" => "image/jpeg", // To-Do?
1739                                 "media:width" => 175,
1740                                 "media:height" => 175,
1741                                 "href" => $contact["photo"]];
1742                 XML::addElement($doc, $object, "link", "", $attributes);
1743
1744                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1745                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1746
1747                 if (trim($contact["location"]) != "") {
1748                         $element = $doc->createElement("poco:address");
1749                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1750                         $object->appendChild($element);
1751                 }
1752
1753                 return $object;
1754         }
1755
1756         /**
1757          * @brief Adds a follow/unfollow entry element
1758          *
1759          * @param object $doc      XML document
1760          * @param array  $item     Data of the follow/unfollow message
1761          * @param array  $owner    Contact data of the poster
1762          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1763          *
1764          * @return object Entry element
1765          */
1766         private static function followEntry($doc, $item, $owner, $toplevel)
1767         {
1768                 $item["id"] = $item["parent"] = 0;
1769                 $item["created"] = $item["edited"] = date("c");
1770                 $item["private"] = true;
1771
1772                 $contact = Probe::uri($item['follow']);
1773
1774                 if ($contact['alias'] == '') {
1775                         $contact['alias'] = $contact["url"];
1776                 } else {
1777                         $item['follow'] = $contact['alias'];
1778                 }
1779
1780                 $r = q(
1781                         "SELECT `id` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1782                         intval($owner['uid']),
1783                         dbesc(normalise_link($contact["url"]))
1784                 );
1785
1786                 if (DBM::is_result($r)) {
1787                         $connect_id = $r[0]['id'];
1788                 } else {
1789                         $connect_id = 0;
1790                 }
1791
1792                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1793                         $message = L10n::t('%s is now following %s.');
1794                         $title = L10n::t('following');
1795                         $action = "subscription";
1796                 } else {
1797                         $message = L10n::t('%s stopped following %s.');
1798                         $title = L10n::t('stopped following');
1799                         $action = "unfollow";
1800                 }
1801
1802                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1803                                 = 'tag:'.get_app()->get_hostname().
1804                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1805                                 ':person:'.$connect_id.':'.$item['created'];
1806
1807                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1808
1809                 self::entryHeader($doc, $entry, $owner, $toplevel);
1810
1811                 self::entryContent($doc, $entry, $item, $owner, $title);
1812
1813                 $object = self::addPersonObject($doc, $owner, $contact);
1814                 $entry->appendChild($object);
1815
1816                 self::entryFooter($doc, $entry, $item, $owner);
1817
1818                 return $entry;
1819         }
1820
1821         /**
1822          * @brief Adds a regular entry element
1823          *
1824          * @param object $doc      XML document
1825          * @param array  $item     Data of the item that is to be posted
1826          * @param array  $owner    Contact data of the poster
1827          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1828          *
1829          * @return object Entry element
1830          */
1831         private static function noteEntry($doc, $item, $owner, $toplevel)
1832         {
1833                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1834                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1835                 }
1836
1837                 $title = self::entryHeader($doc, $entry, $owner, $toplevel);
1838
1839                 XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1840
1841                 self::entryContent($doc, $entry, $item, $owner, $title);
1842
1843                 self::entryFooter($doc, $entry, $item, $owner);
1844
1845                 return $entry;
1846         }
1847
1848         /**
1849          * @brief Adds a header element to the XML document
1850          *
1851          * @param object $doc      XML document
1852          * @param object $entry    The entry element where the elements are added
1853          * @param array  $owner    Contact data of the poster
1854          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1855          *
1856          * @return string The title for the element
1857          */
1858         private static function entryHeader($doc, &$entry, $owner, $toplevel)
1859         {
1860                 /// @todo Check if this title stuff is really needed (I guess not)
1861                 if (!$toplevel) {
1862                         $entry = $doc->createElement("entry");
1863                         $title = sprintf("New note by %s", $owner["nick"]);
1864                 } else {
1865                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, "entry");
1866
1867                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1868                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1869                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1870                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1871                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
1872                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1873                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1874                         $entry->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1875
1876                         $author = self::addAuthor($doc, $owner);
1877                         $entry->appendChild($author);
1878
1879                         $title = sprintf("New comment by %s", $owner["nick"]);
1880                 }
1881                 return $title;
1882         }
1883
1884         /**
1885          * @brief Adds elements to the XML document
1886          *
1887          * @param object $doc      XML document
1888          * @param object $entry    Entry element where the content is added
1889          * @param array  $item     Data of the item that is to be posted
1890          * @param array  $owner    Contact data of the poster
1891          * @param string $title    Title for the post
1892          * @param string $verb     The activity verb
1893          * @param bool   $complete Add the "status_net" element?
1894          * @return void
1895          */
1896         private static function entryContent($doc, $entry, $item, $owner, $title, $verb = "", $complete = true)
1897         {
1898                 if ($verb == "") {
1899                         $verb = self::constructVerb($item);
1900                 }
1901
1902                 XML::addElement($doc, $entry, "id", $item["uri"]);
1903                 XML::addElement($doc, $entry, "title", $title);
1904
1905                 $body = self::formatPicturePost($item['body']);
1906
1907                 if ($item['title'] != "") {
1908                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1909                 }
1910
1911                 $body = bbcode($body, false, false, 7);
1912
1913                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1914
1915                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1916                                                                 "href" => System::baseUrl()."/display/".$item["guid"]]
1917                 );
1918
1919                 if ($complete && ($item["id"] > 0)) {
1920                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1921                 }
1922
1923                 XML::addElement($doc, $entry, "activity:verb", $verb);
1924
1925                 XML::addElement($doc, $entry, "published", datetime_convert("UTC", "UTC", $item["created"]."+00:00", ATOM_TIME));
1926                 XML::addElement($doc, $entry, "updated", datetime_convert("UTC", "UTC", $item["edited"]."+00:00", ATOM_TIME));
1927         }
1928
1929         /**
1930          * @brief Adds the elements at the foot of an entry to the XML document
1931          *
1932          * @param object $doc      XML document
1933          * @param object $entry    The entry element where the elements are added
1934          * @param array  $item     Data of the item that is to be posted
1935          * @param array  $owner    Contact data of the poster
1936          * @param bool   $complete default true
1937          * @return void
1938          */
1939         private static function entryFooter($doc, $entry, $item, $owner, $complete = true)
1940         {
1941                 $mentioned = [];
1942
1943                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
1944                         $parent = q("SELECT `guid`, `author-link`, `owner-link` FROM `item` WHERE `id` = %d", intval($item["parent"]));
1945                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1946
1947                         $thrparent = q(
1948                                 "SELECT `guid`, `author-link`, `owner-link`, `plink` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
1949                                 intval($owner["uid"]),
1950                                 dbesc($parent_item)
1951                         );
1952                         if ($thrparent) {
1953                                 $mentioned[$thrparent[0]["author-link"]] = $thrparent[0]["author-link"];
1954                                 $mentioned[$thrparent[0]["owner-link"]] = $thrparent[0]["owner-link"];
1955                                 $parent_plink = $thrparent[0]["plink"];
1956                         } else {
1957                                 $mentioned[$parent[0]["author-link"]] = $parent[0]["author-link"];
1958                                 $mentioned[$parent[0]["owner-link"]] = $parent[0]["owner-link"];
1959                                 $parent_plink = System::baseUrl()."/display/".$parent[0]["guid"];
1960                         }
1961
1962                         $attributes = [
1963                                         "ref" => $parent_item,
1964                                         "href" => $parent_plink];
1965                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1966
1967                         $attributes = [
1968                                         "rel" => "related",
1969                                         "href" => $parent_plink];
1970                         XML::addElement($doc, $entry, "link", "", $attributes);
1971                 }
1972
1973                 if (intval($item["parent"]) > 0) {
1974                         $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
1975                         $conversation_uri = $conversation_href;
1976
1977                         if (isset($parent_item)) {
1978                                 $r = dba::fetch_first("SELECT `conversation-uri`, `conversation-href` FROM `conversation` WHERE `item-uri` = ?", $parent_item);
1979                                 if (DBM::is_result($r)) {
1980                                         if ($r['conversation-uri'] != '') {
1981                                                 $conversation_uri = $r['conversation-uri'];
1982                                         }
1983                                         if ($r['conversation-href'] != '') {
1984                                                 $conversation_href = $r['conversation-href'];
1985                                         }
1986                                 }
1987                         }
1988
1989                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
1990
1991                         $attributes = [
1992                                         "href" => $conversation_href,
1993                                         "local_id" => $item["parent"],
1994                                         "ref" => $conversation_uri];
1995
1996                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1997                 }
1998
1999                 $tags = item_getfeedtags($item);
2000
2001                 if (count($tags)) {
2002                         foreach ($tags as $t) {
2003                                 if ($t[0] == "@") {
2004                                         $mentioned[$t[1]] = $t[1];
2005                                 }
2006                         }
2007                 }
2008
2009                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
2010                 $newmentions = [];
2011                 foreach ($mentioned as $mention) {
2012                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
2013                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
2014                 }
2015                 $mentioned = $newmentions;
2016
2017                 foreach ($mentioned as $mention) {
2018                         $r = q(
2019                                 "SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
2020                                 intval($owner["uid"]),
2021                                 dbesc(normalise_link($mention))
2022                         );
2023                         if ($r[0]["forum"] || $r[0]["prv"]) {
2024                                 XML::addElement($doc, $entry, "link", "",
2025                                         [
2026                                                 "rel" => "mentioned",
2027                                                 "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
2028                                                 "href" => $mention]
2029                                 );
2030                         } else {
2031                                 XML::addElement($doc, $entry, "link", "",
2032                                         [
2033                                                 "rel" => "mentioned",
2034                                                 "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
2035                                                 "href" => $mention]
2036                                 );
2037                         }
2038                 }
2039
2040                 if (!$item["private"]) {
2041                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2042                                                                         "href" => "http://activityschema.org/collection/public"]);
2043                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2044                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2045                                                                         "href" => "http://activityschema.org/collection/public"]);
2046                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2047                 }
2048
2049                 if (count($tags)) {
2050                         foreach ($tags as $t) {
2051                                 if ($t[0] != "@") {
2052                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2053                                 }
2054                         }
2055                 }
2056
2057                 self::getAttachment($doc, $entry, $item);
2058
2059                 if ($complete && ($item["id"] > 0)) {
2060                         $app = $item["app"];
2061                         if ($app == "") {
2062                                 $app = "web";
2063                         }
2064
2065                         $attributes = ["local_id" => $item["id"], "source" => $app];
2066
2067                         if (isset($parent["id"])) {
2068                                 $attributes["repeat_of"] = $parent["id"];
2069                         }
2070
2071                         if ($item["coord"] != "") {
2072                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2073                         }
2074
2075                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2076                 }
2077         }
2078
2079         /**
2080          * Creates the XML feed for a given nickname
2081          *
2082          * Supported filters:
2083          * - activity (default): all the public posts
2084          * - posts: all the public top-level posts
2085          * - comments: all the public replies
2086          *
2087          * Updates the provided last_update parameter if the result comes from the
2088          * cache or it is empty
2089          *
2090          * @brief Creates the XML feed for a given nickname
2091          *
2092          * @param string  $owner_nick  Nickname of the feed owner
2093          * @param string  $last_update Date of the last update
2094          * @param integer $max_items   Number of maximum items to fetch
2095          * @param string  $filter      Feed items filter (activity, posts or comments)
2096          * @param boolean $nocache     Wether to bypass caching
2097          *
2098          * @return string XML feed
2099          */
2100         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2101         {
2102                 $stamp = microtime(true);
2103
2104                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2105
2106                 $previous_created = $last_update;
2107
2108                 $result = Cache::get($cachekey);
2109                 if (!$nocache && !is_null($result)) {
2110                         logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', LOGGER_DEBUG);
2111                         $last_update = $result['last_update'];
2112                         return $result['feed'];
2113                 }
2114
2115                 $owner = dba::fetch_first(
2116                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
2117                                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
2118                                 WHERE `contact`.`self` AND `user`.`nickname` = ? LIMIT 1",
2119                         $owner_nick
2120                 );
2121                 if (!DBM::is_result($owner)) {
2122                         return;
2123                 }
2124
2125                 if (!strlen($last_update)) {
2126                         $last_update = 'now -30 days';
2127                 }
2128
2129                 $check_date = datetime_convert('UTC', 'UTC', $last_update, 'Y-m-d H:i:s');
2130                 $authorid = Contact::getIdForURL($owner["url"], 0);
2131
2132                 $sql_extra = '';
2133                 if ($filter === 'posts') {
2134                         $sql_extra .= ' AND `item`.`id` = `item`.`parent` ';
2135                 }
2136
2137                 if ($filter === 'comments') {
2138                         $sql_extra .= sprintf(" AND `item`.`object-type` = '%s' ", dbesc(ACTIVITY_OBJ_COMMENT));
2139                 }
2140
2141                 $items = q(
2142                         "SELECT `item`.*, `item`.`id` AS `item_id` FROM `item` USE INDEX (`uid_contactid_created`)
2143                                 STRAIGHT_JOIN `thread` ON `thread`.`iid` = `item`.`parent`
2144                                 WHERE `item`.`uid` = %d
2145                                 AND `item`.`contact-id` = %d
2146                                 AND `item`.`author-id` = %d
2147                                 AND `item`.`created` > '%s'
2148                                 AND NOT `item`.`deleted`
2149                                 AND NOT `item`.`private`
2150                                 AND `thread`.`network` IN ('%s', '%s')
2151                                 $sql_extra
2152                                 ORDER BY `item`.`created` DESC LIMIT %d",
2153                         intval($owner["uid"]),
2154                         intval($owner["id"]),
2155                         intval($authorid),
2156                         dbesc($check_date),
2157                         dbesc(NETWORK_OSTATUS),
2158                         dbesc(NETWORK_DFRN),
2159                         intval($max_items)
2160                 );
2161
2162                 $doc = new DOMDocument('1.0', 'utf-8');
2163                 $doc->formatOutput = true;
2164
2165                 $root = self::addHeader($doc, $owner, $filter);
2166
2167                 foreach ($items as $item) {
2168                         if (Config::get('system', 'ostatus_debug')) {
2169                                 $item['body'] .= '🍼';
2170                         }
2171                         $entry = self::entry($doc, $item, $owner);
2172                         $root->appendChild($entry);
2173
2174                         if ($last_update < $item['created']) {
2175                                 $last_update = $item['created'];
2176                         }
2177                 }
2178
2179                 $feeddata = trim($doc->saveXML());
2180
2181                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2182                 Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
2183
2184                 logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, LOGGER_DEBUG);
2185
2186                 return $feeddata;
2187         }
2188
2189         /**
2190          * @brief Creates the XML for a salmon message
2191          *
2192          * @param array $item  Data of the item that is to be posted
2193          * @param array $owner Contact data of the poster
2194          *
2195          * @return string XML for the salmon
2196          */
2197         public static function salmon($item, $owner)
2198         {
2199                 $doc = new DOMDocument('1.0', 'utf-8');
2200                 $doc->formatOutput = true;
2201
2202                 if (Config::get('system', 'ostatus_debug')) {
2203                         $item['body'] .= '🐟';
2204                 }
2205
2206                 $entry = self::entry($doc, $item, $owner, true);
2207
2208                 $doc->appendChild($entry);
2209
2210                 return trim($doc->saveXML());
2211         }
2212 }