include/ostatus.php

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