]> git.mxchange.org Git - friendica.git/blob - src/Protocol/OStatus.php
Adopt the relay definition according to the suggestions from @jaywink
[friendica.git] / src / Protocol / OStatus.php
1 <?php
2 /**
3  * @file src/Protocol/OStatus.php
4  */
5 namespace Friendica\Protocol;
6
7 use Friendica\Content\Text\BBCode;
8 use Friendica\Content\Text\HTML;
9 use Friendica\Core\Cache;
10 use Friendica\Core\Config;
11 use Friendica\Core\L10n;
12 use Friendica\Core\System;
13 use Friendica\Database\DBM;
14 use Friendica\Model\Contact;
15 use Friendica\Model\Conversation;
16 use Friendica\Model\GContact;
17 use Friendica\Model\Item;
18 use Friendica\Network\Probe;
19 use Friendica\Object\Image;
20 use Friendica\Util\DateTimeFormat;
21 use Friendica\Util\Lock;
22 use Friendica\Util\Network;
23 use Friendica\Util\XML;
24 use dba;
25 use DOMDocument;
26 use DOMXPath;
27
28 require_once 'include/dba.php';
29 require_once 'include/items.php';
30 require_once 'mod/share.php';
31 require_once 'include/enotify.php';
32 require_once 'include/api.php';
33 require_once 'mod/proxy.php';
34
35 /**
36  * @brief This class contain functions for the OStatus protocol
37  */
38 class OStatus
39 {
40         private static $itemlist;
41         private static $conv_list = [];
42
43         /**
44          * @brief Fetches author data
45          *
46          * @param object $xpath     The xpath object
47          * @param object $context   The xml context of the author details
48          * @param array  $importer  user record of the importing user
49          * @param array  $contact   Called by reference, will contain the fetched contact
50          * @param bool   $onlyfetch Only fetch the header without updating the contact entries
51          *
52          * @return array Array of author related entries for the item
53          */
54         private static function fetchAuthor($xpath, $context, $importer, &$contact, $onlyfetch)
55         {
56                 $author = [];
57                 $author["author-link"] = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
58                 $author["author-name"] = $xpath->evaluate('atom:author/atom:name/text()', $context)->item(0)->nodeValue;
59                 $addr = $xpath->evaluate('atom:author/atom:email/text()', $context)->item(0)->nodeValue;
60
61                 $aliaslink = $author["author-link"];
62
63                 $alternate = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0)->attributes;
64                 if (is_object($alternate)) {
65                         foreach ($alternate as $attributes) {
66                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
67                                         $author["author-link"] = $attributes->textContent;
68                                 }
69                         }
70                 }
71                 $author["contact-id"] = $contact["id"];
72
73                 $contact = null;
74                 if ($aliaslink != '') {
75                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ? AND `rel` IN (?, ?)",
76                                         $importer["uid"], $aliaslink, NETWORK_STATUSNET,
77                                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND];
78                         $contact = dba::selectFirst('contact', [], $condition);
79                 }
80
81                 if (!DBM::is_result($contact) && $author["author-link"] != '') {
82                         if ($aliaslink == "") {
83                                 $aliaslink = $author["author-link"];
84                         }
85
86                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ? AND `rel` IN (?, ?)",
87                                         $importer["uid"], normalise_link($author["author-link"]), normalise_link($aliaslink),
88                                         NETWORK_STATUSNET, CONTACT_IS_SHARING, CONTACT_IS_FRIEND];
89                         $contact = dba::selectFirst('contact', [], $condition);
90                 }
91
92                 if (!DBM::is_result($contact) && ($addr != '')) {
93                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ? AND `rel` IN (?, ?)",
94                                         $importer["uid"], $addr, NETWORK_STATUSNET,
95                                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND];
96                         $contact = dba::selectFirst('contact', [], $condition);
97                 }
98
99                 if (DBM::is_result($contact)) {
100                         if ($contact['blocked']) {
101                                 $contact['id'] = -1;
102                         }
103                         $author["contact-id"] = $contact["id"];
104                 }
105
106                 $avatarlist = [];
107                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
108                 foreach ($avatars as $avatar) {
109                         $href = "";
110                         $width = 0;
111                         foreach ($avatar->attributes as $attributes) {
112                                 if ($attributes->name == "href") {
113                                         $href = $attributes->textContent;
114                                 }
115                                 if ($attributes->name == "width") {
116                                         $width = $attributes->textContent;
117                                 }
118                         }
119                         if ($href != "") {
120                                 $avatarlist[$width] = $href;
121                         }
122                 }
123                 if (count($avatarlist) > 0) {
124                         krsort($avatarlist);
125                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
126                 }
127
128                 $displayname = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
129                 if ($displayname != "") {
130                         $author["author-name"] = $displayname;
131                 }
132
133                 $author["owner-name"] = $author["author-name"];
134                 $author["owner-link"] = $author["author-link"];
135                 $author["owner-avatar"] = $author["author-avatar"];
136
137                 // Only update the contacts if it is an OStatus contact
138                 if (DBM::is_result($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact["network"] == NETWORK_OSTATUS)) {
139
140                         // Update contact data
141                         $current = $contact;
142                         unset($current['name-date']);
143
144                         // This query doesn't seem to work
145                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
146                         // if ($value != "")
147                         //      $contact["notify"] = $value;
148
149                         // This query doesn't seem to work as well - I hate these queries
150                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
151                         // if ($value != "")
152                         //      $contact["poll"] = $value;
153
154                         $contact['url'] = $author["author-link"];
155                         $contact['nurl'] = normalise_link($contact['url']);
156
157                         $value = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
158                         if ($value != "") {
159                                 $contact["alias"] = $value;
160                         }
161
162                         $value = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
163                         if ($value != "") {
164                                 $contact["name"] = $value;
165                         }
166
167                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $context)->item(0)->nodeValue;
168                         if ($value != "") {
169                                 $contact["nick"] = $value;
170                         }
171
172                         $value = $xpath->evaluate('atom:author/poco:note/text()', $context)->item(0)->nodeValue;
173                         if ($value != "") {
174                                 $contact["about"] = HTML::toBBCode($value);
175                         }
176
177                         $value = $xpath->evaluate('atom:author/poco:address/poco:formatted/text()', $context)->item(0)->nodeValue;
178                         if ($value != "") {
179                                 $contact["location"] = $value;
180                         }
181
182                         $contact['name-date'] = DateTimeFormat::utcNow();
183
184                         dba::update('contact', $contact, ['id' => $contact["id"]], $current);
185
186                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
187                                 logger("Update profile picture for contact ".$contact["id"], LOGGER_DEBUG);
188                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
189                         }
190
191                         // Ensure that we are having this contact (with uid=0)
192                         $cid = Contact::getIdForURL($aliaslink, 0, true);
193
194                         if ($cid) {
195                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
196                                 $old_contact = dba::selectFirst('contact', $fields, ['id' => $cid]);
197
198                                 // Update it with the current values
199                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
200                                                 'nurl' => normalise_link($author["author-link"]),
201                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
202                                                 'about' => $contact["about"], 'location' => $contact["location"],
203                                                 'success_update' => DateTimeFormat::utcNow(), 'last-update' => DateTimeFormat::utcNow()];
204
205                                 dba::update('contact', $fields, ['id' => $cid], $old_contact);
206
207                                 // Update the avatar
208                                 Contact::updateAvatar($author["author-avatar"], 0, $cid);
209                         }
210
211                         $contact["generation"] = 2;
212                         $contact["hide"] = false; // OStatus contacts are never hidden
213                         $contact["photo"] = $author["author-avatar"];
214                         $gcid = GContact::update($contact);
215
216                         GContact::link($gcid, $contact["uid"], $contact["id"]);
217                 }
218
219                 return $author;
220         }
221
222         /**
223          * @brief Fetches author data from a given XML string
224          *
225          * @param string $xml      The XML
226          * @param array  $importer user record of the importing user
227          *
228          * @return array Array of author related entries for the item
229          */
230         public static function salmonAuthor($xml, $importer)
231         {
232                 if ($xml == "") {
233                         return;
234                 }
235
236                 $doc = new DOMDocument();
237                 @$doc->loadXML($xml);
238
239                 $xpath = new DOMXPath($doc);
240                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
241                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
242                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
243                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
244                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
245                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
246                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
247                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
248
249                 $contact = ["id" => 0];
250
251                 // Fetch the first author
252                 $authordata = $xpath->query('//author')->item(0);
253                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, true);
254                 return $author;
255         }
256
257         /**
258          * @brief Read attributes from element
259          *
260          * @param object $element Element object
261          *
262          * @return array attributes
263          */
264         private static function readAttributes($element)
265         {
266                 $attribute = [];
267
268                 foreach ($element->attributes as $attributes) {
269                         $attribute[$attributes->name] = $attributes->textContent;
270                 }
271
272                 return $attribute;
273         }
274
275         /**
276          * @brief Imports an XML string containing OStatus elements
277          *
278          * @param string $xml      The XML
279          * @param array  $importer user record of the importing user
280          * @param array  $contact  contact
281          * @param string $hub      Called by reference, returns the fetched hub data
282          * @return void
283          */
284         public static function import($xml, $importer, &$contact, &$hub)
285         {
286                 self::process($xml, $importer, $contact, $hub);
287         }
288
289         /**
290          * @brief Internal feed processing
291          *
292          * @param string  $xml        The XML
293          * @param array   $importer   user record of the importing user
294          * @param array   $contact    contact
295          * @param string  $hub        Called by reference, returns the fetched hub data
296          * @param boolean $stored     Is the post fresh imported or from the database?
297          * @param boolean $initialize Is it the leading post so that data has to be initialized?
298          *
299          * @return boolean Could the XML be processed?
300          */
301         private static function process($xml, $importer, &$contact, &$hub, $stored = false, $initialize = true)
302         {
303                 if ($initialize) {
304                         self::$itemlist = [];
305                         self::$conv_list = [];
306                 }
307
308                 logger("Import OStatus message", LOGGER_DEBUG);
309
310                 if ($xml == "") {
311                         return false;
312                 }
313                 $doc = new DOMDocument();
314                 @$doc->loadXML($xml);
315
316                 $xpath = new DOMXPath($doc);
317                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
318                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
319                 $xpath->registerNamespace('georss', NAMESPACE_GEORSS);
320                 $xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
321                 $xpath->registerNamespace('media', NAMESPACE_MEDIA);
322                 $xpath->registerNamespace('poco', NAMESPACE_POCO);
323                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
324                 $xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
325
326                 $hub = "";
327                 $hub_attributes = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0)->attributes;
328                 if (is_object($hub_attributes)) {
329                         foreach ($hub_attributes as $hub_attribute) {
330                                 if ($hub_attribute->name == "href") {
331                                         $hub = $hub_attribute->textContent;
332                                         logger("Found hub ".$hub, LOGGER_DEBUG);
333                                 }
334                         }
335                 }
336
337                 $header = [];
338                 $header["uid"] = $importer["uid"];
339                 $header["network"] = NETWORK_OSTATUS;
340                 $header["type"] = "remote";
341                 $header["wall"] = 0;
342                 $header["origin"] = 0;
343                 $header["gravity"] = GRAVITY_PARENT;
344
345                 $first_child = $doc->firstChild->tagName;
346
347                 if ($first_child == "feed") {
348                         $entries = $xpath->query('/atom:feed/atom:entry');
349                 } else {
350                         $entries = $xpath->query('/atom:entry');
351                 }
352
353                 if ($entries->length == 1) {
354                         // We reformat the XML to make it better readable
355                         $doc2 = new DOMDocument();
356                         $doc2->loadXML($xml);
357                         $doc2->preserveWhiteSpace = false;
358                         $doc2->formatOutput = true;
359                         $xml2 = $doc2->saveXML();
360
361                         $header["protocol"] = PROTOCOL_OSTATUS_SALMON;
362                         $header["source"] = $xml2;
363                 } elseif (!$initialize) {
364                         return false;
365                 }
366
367                 // Fetch the first author
368                 $authordata = $xpath->query('//author')->item(0);
369                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
370
371                 $entry = $xpath->query('/atom:entry');
372
373                 // Reverse the order of the entries
374                 $entrylist = [];
375
376                 foreach ($entries as $entry) {
377                         $entrylist[] = $entry;
378                 }
379
380                 foreach (array_reverse($entrylist) as $entry) {
381                         // fetch the author
382                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
383
384                         if ($authorelement->length == 0) {
385                                 $authorelement = $xpath->query('atom:author', $entry);
386                         }
387
388                         if ($authorelement->length > 0) {
389                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
390                         }
391
392                         $value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $entry)->item(0)->nodeValue;
393                         if ($value != "") {
394                                 $nickname = $value;
395                         } else {
396                                 $nickname = $author["author-name"];
397                         }
398
399                         $item = array_merge($header, $author);
400
401                         $item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
402
403                         $item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
404
405                         // Delete a message
406                         if (in_array($item["verb"], ['qvitter-delete-notice', ACTIVITY_DELETE, 'delete'])) {
407                                 self::deleteNotice($item);
408                                 continue;
409                         }
410
411                         if (in_array($item["verb"], [NAMESPACE_OSTATUS."/unfavorite", ACTIVITY_UNFAVORITE])) {
412                                 // Ignore "Unfavorite" message
413                                 logger("Ignore unfavorite message ".print_r($item, true), LOGGER_DEBUG);
414                                 continue;
415                         }
416
417                         // Deletions come with the same uri, so we check for duplicates after processing deletions
418                         if (dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
419                                 logger('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
420                                 continue;
421                         } else {
422                                 logger('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
423                         }
424
425                         if ($item["verb"] == ACTIVITY_JOIN) {
426                                 // ignore "Join" messages
427                                 logger("Ignore join message ".print_r($item, true), LOGGER_DEBUG);
428                                 continue;
429                         }
430
431                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
432                                 // ignore mastodon "block" messages
433                                 logger("Ignore block message ".print_r($item, true), LOGGER_DEBUG);
434                                 continue;
435                         }
436
437                         if ($item["verb"] == ACTIVITY_FOLLOW) {
438                                 Contact::addRelationship($importer, $contact, $item, $nickname);
439                                 continue;
440                         }
441
442                         if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
443                                 Contact::removeFollower($importer, $contact, $item, $dummy);
444                                 continue;
445                         }
446
447                         if ($item["verb"] == ACTIVITY_FAVORITE) {
448                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
449                                 logger("Favorite ".$orig_uri." ".print_r($item, true));
450
451                                 $item["verb"] = ACTIVITY_LIKE;
452                                 $item["parent-uri"] = $orig_uri;
453                                 $item["gravity"] = GRAVITY_LIKE;
454                         }
455
456                         // http://activitystrea.ms/schema/1.0/rsvp-yes
457                         if (!in_array($item["verb"], [ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE])) {
458                                 logger("Unhandled verb ".$item["verb"]." ".print_r($item, true), LOGGER_DEBUG);
459                         }
460
461                         self::processPost($xpath, $entry, $item, $importer);
462
463                         if ($initialize && (count(self::$itemlist) > 0)) {
464                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
465                                         // We will import it everytime, when it is started by our contacts
466                                         $valid = !empty(self::$itemlist[0]['contact-id']);
467                                         if (!$valid) {
468                                                 // If not, then it depends on this setting
469                                                 $valid = !Config::get('system', 'ostatus_full_threads');
470                                                 if ($valid) {
471                                                         logger("Item with uri ".self::$itemlist[0]['uri']." will be imported due to the system settings.", LOGGER_DEBUG);
472                                                 }
473                                         } else {
474                                                 logger("Item with uri ".self::$itemlist[0]['uri']." belongs to a contact (".self::$itemlist[0]['contact-id']."). It will be imported.", LOGGER_DEBUG);
475                                         }
476                                         if ($valid) {
477                                                 // Never post a thread when the only interaction by our contact was a like
478                                                 $valid = false;
479                                                 $verbs = [ACTIVITY_POST, ACTIVITY_SHARE];
480                                                 foreach (self::$itemlist as $item) {
481                                                         if (!empty($item['contact-id']) && in_array($item['verb'], $verbs)) {
482                                                                 $valid = true;
483                                                         }
484                                                 }
485                                                 if ($valid) {
486                                                         logger("Item with uri ".self::$itemlist[0]['uri']." will be imported since the thread contains posts or shares.", LOGGER_DEBUG);
487                                                 }
488                                         }
489                                 } else {
490                                         // But we will only import complete threads
491                                         $valid = dba::exists('item', ['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
492                                         if ($valid) {
493                                                 logger("Item with uri ".self::$itemlist[0]["uri"]." belongs to parent ".self::$itemlist[0]['parent-uri']." of user ".$importer["uid"].". It will be imported.", LOGGER_DEBUG);
494                                         }
495                                 }
496
497                                 if ($valid) {
498                                         $default_contact = 0;
499                                         $key = count(self::$itemlist);
500                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
501                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
502                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
503                                                 } else {
504                                                         $default_contact = $item['contact-id'];
505                                                 }
506                                         }
507                                         foreach (self::$itemlist as $item) {
508                                                 $found = dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item["uri"]]);
509                                                 if ($found) {
510                                                         logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", LOGGER_DEBUG);
511                                                 } elseif ($item['contact-id'] < 0) {
512                                                         logger("Item with uri ".$item["uri"]." is from a blocked contact.", LOGGER_DEBUG);
513                                                 } else {
514                                                         // We are having duplicated entries. Hopefully this solves it.
515                                                         if (Lock::set('ostatus_process_item_insert')) {
516                                                                 $ret = Item::insert($item);
517                                                                 Lock::remove('ostatus_process_item_insert');
518                                                                 logger("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
519                                                         } else {
520                                                                 $ret = Item::insert($item);
521                                                                 logger("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
522                                                         }
523                                                 }
524                                         }
525                                 }
526                                 self::$itemlist = [];
527                         }
528                         logger('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', LOGGER_DEBUG);
529                 }
530                 return true;
531         }
532
533         /**
534          * @param object $item item
535          * @return void
536          */
537         private static function deleteNotice($item)
538         {
539                 $condition = ['uid' => $item['uid'], 'author-link' => $item['author-link'], 'uri' => $item['uri']];
540                 $deleted = dba::selectFirst('item', ['id', 'parent-uri'], $condition);
541                 if (!DBM::is_result($deleted)) {
542                         logger('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it. ");
543                         return;
544                 }
545
546                 Item::deleteById($deleted["id"]);
547
548                 logger('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
549         }
550
551         /**
552          * @brief Processes the XML for a post
553          *
554          * @param object $xpath    The xpath object
555          * @param object $entry    The xml entry that is processed
556          * @param array  $item     The item array
557          * @param array  $importer user record of the importing user
558          * @return void
559          */
560         private static function processPost($xpath, $entry, &$item, $importer)
561         {
562                 $item["body"] = HTML::toBBCode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
563                 $item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
564                 if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
565                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
566                         $item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
567                 } elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
568                         $item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
569                 }
570
571                 $item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
572                 $item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
573                 $conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
574                 $item['conversation-uri'] = $conversation;
575
576                 $conv = $xpath->query('ostatus:conversation', $entry);
577                 if (is_object($conv->item(0))) {
578                         foreach ($conv->item(0)->attributes as $attributes) {
579                                 if ($attributes->name == "ref") {
580                                         $item['conversation-uri'] = $attributes->textContent;
581                                 }
582                                 if ($attributes->name == "href") {
583                                         $item['conversation-href'] = $attributes->textContent;
584                                 }
585                         }
586                 }
587
588                 $related = "";
589
590                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
591                 if (is_object($inreplyto->item(0))) {
592                         foreach ($inreplyto->item(0)->attributes as $attributes) {
593                                 if ($attributes->name == "ref") {
594                                         $item["parent-uri"] = $attributes->textContent;
595                                 }
596                                 if ($attributes->name == "href") {
597                                         $related = $attributes->textContent;
598                                 }
599                         }
600                 }
601
602                 $georsspoint = $xpath->query('georss:point', $entry);
603                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
604                         $item["coord"] = $georsspoint->item(0)->nodeValue;
605                 }
606
607                 $categories = $xpath->query('atom:category', $entry);
608                 if ($categories) {
609                         foreach ($categories as $category) {
610                                 foreach ($category->attributes as $attributes) {
611                                         if ($attributes->name == "term") {
612                                                 $term = $attributes->textContent;
613                                                 if (strlen($item["tag"])) {
614                                                         $item["tag"] .= ',';
615                                                 }
616                                                 $item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
617                                         }
618                                 }
619                         }
620                 }
621
622                 $self = '';
623                 $add_body = '';
624
625                 $links = $xpath->query('atom:link', $entry);
626                 if ($links) {
627                         $link_data = self::processLinks($links, $item);
628                         $self = $link_data['self'];
629                         $add_body = $link_data['add_body'];
630                 }
631
632                 $repeat_of = "";
633
634                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
635                 if ($notice_info && ($notice_info->length > 0)) {
636                         foreach ($notice_info->item(0)->attributes as $attributes) {
637                                 if ($attributes->name == "source") {
638                                         $item["app"] = strip_tags($attributes->textContent);
639                                 }
640                                 if ($attributes->name == "repeat_of") {
641                                         $repeat_of = $attributes->textContent;
642                                 }
643                         }
644                 }
645                 // Is it a repeated post?
646                 if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
647                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
648                         if (!empty($link_data['add_body'])) {
649                                 $add_body .= $link_data['add_body'];
650                         }
651                 }
652
653                 $item["body"] .= $add_body;
654
655                 // Only add additional data when there is no picture in the post
656                 if (!strstr($item["body"], '[/img]')) {
657                         $item["body"] = add_page_info_to_body($item["body"]);
658                 }
659
660                 // Mastodon Content Warning
661                 if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
662                         $clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
663                         if (!empty($clear_text)) {
664                                 $item['content-warning'] = HTML::toBBCode($clear_text);
665                         }
666                 }
667
668                 if (($self != '') && empty($item['protocol'])) {
669                         self::fetchSelf($self, $item);
670                 }
671
672                 if (!empty($item["conversation-href"])) {
673                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
674                 }
675
676                 if (isset($item["parent-uri"])) {
677                         if (!dba::exists('item', ['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
678                                 if ($related != '') {
679                                         self::fetchRelated($related, $item["parent-uri"], $importer);
680                                 }
681                         } else {
682                                 logger('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', LOGGER_DEBUG);
683                         }
684
685                         $item["type"] = 'remote-comment';
686                         $item["gravity"] = GRAVITY_COMMENT;
687                 } else {
688                         $item["parent-uri"] = $item["uri"];
689                 }
690
691                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
692                         $item = Conversation::insert($item);
693                 }
694
695                 self::$itemlist[] = $item;
696         }
697
698         /**
699          * @brief Fetch the conversation for posts
700          *
701          * @param string $conversation     The link to the conversation
702          * @param string $conversation_uri The conversation in "uri" format
703          * @return void
704          */
705         private static function fetchConversation($conversation, $conversation_uri)
706         {
707                 // Ensure that we only store a conversation once in a process
708                 if (isset(self::$conv_list[$conversation])) {
709                         return;
710                 }
711
712                 self::$conv_list[$conversation] = true;
713
714                 $conversation_data = Network::curl($conversation, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
715
716                 if (!$conversation_data['success']) {
717                         return;
718                 }
719
720                 $xml = '';
721
722                 if (stristr($conversation_data['header'], 'Content-Type: application/atom+xml')) {
723                         $xml = $conversation_data['body'];
724                 }
725
726                 if ($xml == '') {
727                         $doc = new DOMDocument();
728                         if (!@$doc->loadHTML($conversation_data['body'])) {
729                                 return;
730                         }
731                         $xpath = new DOMXPath($doc);
732
733                         $links = $xpath->query('//link');
734                         if ($links) {
735                                 $file = '';
736                                 foreach ($links as $link) {
737                                         $attribute = self::readAttributes($link);
738                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
739                                                 $file = $attribute['href'];
740                                         }
741                                 }
742                                 if ($file != '') {
743                                         $conversation_atom = Network::curl($attribute['href']);
744
745                                         if ($conversation_atom['success']) {
746                                                 $xml = $conversation_atom['body'];
747                                         }
748                                 }
749                         }
750                 }
751
752                 if ($xml == '') {
753                         return;
754                 }
755
756                 self::storeConversation($xml, $conversation, $conversation_uri);
757         }
758
759         /**
760          * @brief Store a feed in several conversation entries
761          *
762          * @param string $xml              The feed
763          * @param string $conversation     conversation
764          * @param string $conversation_uri conversation uri
765          * @return void
766          */
767         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
768         {
769                 $doc = new DOMDocument();
770                 @$doc->loadXML($xml);
771
772                 $xpath = new DOMXPath($doc);
773                 $xpath->registerNamespace('atom', NAMESPACE_ATOM1);
774                 $xpath->registerNamespace('thr', NAMESPACE_THREAD);
775                 $xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
776
777                 $entries = $xpath->query('/atom:feed/atom:entry');
778
779                 // Now store the entries
780                 foreach ($entries as $entry) {
781                         $doc2 = new DOMDocument();
782                         $doc2->preserveWhiteSpace = false;
783                         $doc2->formatOutput = true;
784
785                         $conv_data = [];
786
787                         $conv_data['protocol'] = PROTOCOL_SPLITTED_CONV;
788                         $conv_data['network'] = NETWORK_OSTATUS;
789                         $conv_data['uri'] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
790
791                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
792                         if (is_object($inreplyto->item(0))) {
793                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
794                                         if ($attributes->name == "ref") {
795                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
796                                         }
797                                 }
798                         }
799
800                         $conv = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
801                         $conv_data['conversation-uri'] = $conv;
802
803                         $conv = $xpath->query('ostatus:conversation', $entry);
804                         if (is_object($conv->item(0))) {
805                                 foreach ($conv->item(0)->attributes as $attributes) {
806                                         if ($attributes->name == "ref") {
807                                                 $conv_data['conversation-uri'] = $attributes->textContent;
808                                         }
809                                         if ($attributes->name == "href") {
810                                                 $conv_data['conversation-href'] = $attributes->textContent;
811                                         }
812                                 }
813                         }
814
815                         if ($conversation != '') {
816                                 $conv_data['conversation-uri'] = $conversation;
817                         }
818
819                         if ($conversation_uri != '') {
820                                 $conv_data['conversation-uri'] = $conversation_uri;
821                         }
822
823                         $entry = $doc2->importNode($entry, true);
824
825                         $doc2->appendChild($entry);
826
827                         $conv_data['source'] = $doc2->saveXML();
828
829                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => PROTOCOL_OSTATUS_FEED];
830                         if (dba::exists('conversation', $condition)) {
831                                 logger('Delete deprecated entry for URI '.$conv_data['uri'], LOGGER_DEBUG);
832                                 dba::delete('conversation', ['item-uri' => $conv_data['uri']]);
833                         }
834
835                         logger('Store conversation data for uri '.$conv_data['uri'], LOGGER_DEBUG);
836                         Conversation::insert($conv_data);
837                 }
838         }
839
840         /**
841          * @brief Fetch the own post so that it can be stored later
842          *
843          * We want to store the original data for later processing.
844          * This function is meant for cases where we process a feed with multiple entries.
845          * In that case we need to fetch the single posts here.
846          *
847          * @param string $self The link to the self item
848          * @param array  $item The item array
849          * @return void
850          */
851         private static function fetchSelf($self, &$item)
852         {
853                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
854                 if (dba::exists('conversation', $condition)) {
855                         logger('Conversation '.$item['uri'].' is already stored.', LOGGER_DEBUG);
856                         return;
857                 }
858
859                 $self_data = Network::curl($self);
860
861                 if (!$self_data['success']) {
862                         return;
863                 }
864
865                 // We reformat the XML to make it better readable
866                 $doc = new DOMDocument();
867                 $doc->loadXML($self_data['body']);
868                 $doc->preserveWhiteSpace = false;
869                 $doc->formatOutput = true;
870                 $xml = $doc->saveXML();
871
872                 $item["protocol"] = PROTOCOL_OSTATUS_SALMON;
873                 $item["source"] = $xml;
874
875                 logger('Conversation '.$item['uri'].' is now fetched.', LOGGER_DEBUG);
876         }
877
878         /**
879          * @brief Fetch related posts and processes them
880          *
881          * @param string $related     The link to the related item
882          * @param string $related_uri The related item in "uri" format
883          * @param array  $importer    user record of the importing user
884          * @return void
885          */
886         private static function fetchRelated($related, $related_uri, $importer)
887         {
888                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON];
889                 $conversation = dba::selectFirst('conversation', ['source', 'protocol'], $condition);
890                 if (DBM::is_result($conversation)) {
891                         $stored = true;
892                         $xml = $conversation['source'];
893                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
894                                 logger('Got valid cached XML for URI '.$related_uri, LOGGER_DEBUG);
895                                 return;
896                         }
897                         if ($conversation['protocol'] == PROTOCOL_OSTATUS_SALMON) {
898                                 logger('Delete invalid cached XML for URI '.$related_uri, LOGGER_DEBUG);
899                                 dba::delete('conversation', ['item-uri' => $related_uri]);
900                         }
901                 }
902
903                 $stored = false;
904                 $related_data = Network::curl($related, false, $redirects, ['accept_content' => 'application/atom+xml, text/html']);
905
906                 if (!$related_data['success']) {
907                         return;
908                 }
909
910                 $xml = '';
911
912                 if (stristr($related_data['header'], 'Content-Type: application/atom+xml')) {
913                         logger('Directly fetched XML for URI '.$related_uri, LOGGER_DEBUG);
914                         $xml = $related_data['body'];
915                 }
916
917                 if ($xml == '') {
918                         $doc = new DOMDocument();
919                         if (!@$doc->loadHTML($related_data['body'])) {
920                                 return;
921                         }
922                         $xpath = new DOMXPath($doc);
923
924                         $atom_file = '';
925
926                         $links = $xpath->query('//link');
927                         if ($links) {
928                                 foreach ($links as $link) {
929                                         $attribute = self::readAttributes($link);
930                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
931                                                 $atom_file = $attribute['href'];
932                                         }
933                                 }
934                                 if ($atom_file != '') {
935                                         $related_atom = Network::curl($atom_file);
936
937                                         if ($related_atom['success']) {
938                                                 logger('Fetched XML for URI '.$related_uri, LOGGER_DEBUG);
939                                                 $xml = $related_atom['body'];
940                                         }
941                                 }
942                         }
943                 }
944
945                 // Workaround for older GNU Social servers
946                 if (($xml == '') && strstr($related, '/notice/')) {
947                         $related_atom = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
948
949                         if ($related_atom['success']) {
950                                 logger('GNU Social workaround to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
951                                 $xml = $related_atom['body'];
952                         }
953                 }
954
955                 // Even more worse workaround for GNU Social ;-)
956                 if ($xml == '') {
957                         $related_guess = OStatus::convertHref($related_uri);
958                         $related_atom = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
959
960                         if ($related_atom['success']) {
961                                 logger('GNU Social workaround 2 to fetch XML for URI '.$related_uri, LOGGER_DEBUG);
962                                 $xml = $related_atom['body'];
963                         }
964                 }
965
966                 // Finally we take the data that we fetched from "ostatus:conversation"
967                 if ($xml == '') {
968                         $condition = ['item-uri' => $related_uri, 'protocol' => PROTOCOL_SPLITTED_CONV];
969                         $conversation = dba::selectFirst('conversation', ['source'], $condition);
970                         if (DBM::is_result($conversation)) {
971                                 $stored = true;
972                                 logger('Got cached XML from conversation for URI '.$related_uri, LOGGER_DEBUG);
973                                 $xml = $conversation['source'];
974                         }
975                 }
976
977                 if ($xml != '') {
978                         self::process($xml, $importer, $contact, $hub, $stored, false);
979                 } else {
980                         logger("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, LOGGER_DEBUG);
981                 }
982                 return;
983         }
984
985         /**
986          * @brief Processes the XML for a repeated post
987          *
988          * @param object $xpath    The xpath object
989          * @param object $entry    The xml entry that is processed
990          * @param array  $item     The item array
991          * @param array  $importer user record of the importing user
992          *
993          * @return array with data from links
994          */
995         private static function processRepeatedItem($xpath, $entry, &$item, $importer)
996         {
997                 $activityobjects = $xpath->query('activity:object', $entry)->item(0);
998
999                 if (!is_object($activityobjects)) {
1000                         return [];
1001                 }
1002
1003                 $link_data = [];
1004
1005                 $orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
1006
1007                 $links = $xpath->query("atom:link", $activityobjects);
1008                 if ($links) {
1009                         $link_data = self::processLinks($links, $item);
1010                 }
1011
1012                 $orig_body = $xpath->query('atom:content/text()', $activityobjects)->item(0)->nodeValue;
1013                 $orig_created = $xpath->query('atom:published/text()', $activityobjects)->item(0)->nodeValue;
1014                 $orig_edited = $xpath->query('atom:updated/text()', $activityobjects)->item(0)->nodeValue;
1015
1016                 $orig_author = self::fetchAuthor($xpath, $activityobjects, $importer, $dummy, false);
1017
1018                 $item["author-name"] = $orig_author["author-name"];
1019                 $item["author-link"] = $orig_author["author-link"];
1020                 $item["author-avatar"] = $orig_author["author-avatar"];
1021
1022                 $item["body"] = HTML::toBBCode($orig_body);
1023                 $item["created"] = $orig_created;
1024                 $item["edited"] = $orig_edited;
1025
1026                 $item["uri"] = $orig_uri;
1027
1028                 $item["verb"] = $xpath->query('activity:verb/text()', $activityobjects)->item(0)->nodeValue;
1029
1030                 $item["object-type"] = $xpath->query('activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
1031
1032                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobjects);
1033                 if (is_object($inreplyto->item(0))) {
1034                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1035                                 if ($attributes->name == "ref") {
1036                                         $item["parent-uri"] = $attributes->textContent;
1037                                 }
1038                         }
1039                 }
1040
1041                 return $link_data;
1042         }
1043
1044         /**
1045          * @brief Processes links in the XML
1046          *
1047          * @param object $links The xml data that contain links
1048          * @param array  $item  The item array
1049          *
1050          * @return array with data from the links
1051          */
1052         private static function processLinks($links, &$item)
1053         {
1054                 $link_data = ['add_body' => '', 'self' => ''];
1055
1056                 foreach ($links as $link) {
1057                         $attribute = self::readAttributes($link);
1058
1059                         if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
1060                                 switch ($attribute['rel']) {
1061                                         case "alternate":
1062                                                 $item["plink"] = $attribute['href'];
1063                                                 if (($item["object-type"] == ACTIVITY_OBJ_QUESTION)
1064                                                         || ($item["object-type"] == ACTIVITY_OBJ_EVENT)
1065                                                 ) {
1066                                                         $item["body"] .= add_page_info($attribute['href']);
1067                                                 }
1068                                                 break;
1069                                         case "ostatus:conversation":
1070                                                 $link_data['conversation'] = $attribute['href'];
1071                                                 $item['conversation-href'] = $link_data['conversation'];
1072                                                 if (!isset($item['conversation-uri'])) {
1073                                                         $item['conversation-uri'] = $item['conversation-href'];
1074                                                 }
1075                                                 break;
1076                                         case "enclosure":
1077                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1078                                                 if ($filetype == 'image') {
1079                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1080                                                 } else {
1081                                                         if (strlen($item["attach"])) {
1082                                                                 $item["attach"] .= ',';
1083                                                         }
1084                                                         if (!isset($attribute['length'])) {
1085                                                                 $attribute['length'] = "0";
1086                                                         }
1087                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
1088                                                 }
1089                                                 break;
1090                                         case "related":
1091                                                 if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
1092                                                         if (!isset($item["parent-uri"])) {
1093                                                                 $item["parent-uri"] = $attribute['href'];
1094                                                         }
1095                                                         $link_data['related'] = $attribute['href'];
1096                                                 } else {
1097                                                         $item["body"] .= add_page_info($attribute['href']);
1098                                                 }
1099                                                 break;
1100                                         case "self":
1101                                                 if ($item["plink"] == '') {
1102                                                         $item["plink"] = $attribute['href'];
1103                                                 }
1104                                                 $link_data['self'] = $attribute['href'];
1105                                                 break;
1106                                 }
1107                         }
1108                 }
1109                 return $link_data;
1110         }
1111
1112         /**
1113          * @brief Create an url out of an uri
1114          *
1115          * @param string $href URI in the format "parameter1:parameter1:..."
1116          *
1117          * @return string URL in the format http(s)://....
1118          */
1119         public static function convertHref($href)
1120         {
1121                 $elements = explode(":", $href);
1122
1123                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1124                         return $href;
1125                 }
1126
1127                 $server = explode(",", $elements[1]);
1128                 $conversation = explode("=", $elements[2]);
1129
1130                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1131                         return "http://".$server[0]."/notice/".$elements[3];
1132                 }
1133
1134                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1135                         return $href;
1136                 }
1137                 if ($elements[3] == "objectType=thread") {
1138                         return "http://".$server[0]."/conversation/".$conversation[1];
1139                 } else {
1140                         return "http://".$server[0]."/notice/".$conversation[1];
1141                 }
1142                 return $href;
1143         }
1144
1145         /**
1146          * @brief Checks if the current post is a reshare
1147          *
1148          * @param array $item The item array of thw post
1149          *
1150          * @return string The guid if the post is a reshare
1151          */
1152         private static function getResharedGuid($item)
1153         {
1154                 $body = trim($item["body"]);
1155
1156                 // Skip if it isn't a pure repeated messages
1157                 // Does it start with a share?
1158                 if (strpos($body, "[share") > 0) {
1159                         return "";
1160                 }
1161
1162                 // Does it end with a share?
1163                 if (strlen($body) > (strrpos($body, "[/share]") + 8)) {
1164                         return "";
1165                 }
1166
1167                 $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "$1", $body);
1168                 // Skip if there is no shared message in there
1169                 if ($body == $attributes) {
1170                         return false;
1171                 }
1172
1173                 $guid = "";
1174                 preg_match("/guid='(.*?)'/ism", $attributes, $matches);
1175                 if ($matches[1] != "") {
1176                         $guid = $matches[1];
1177                 }
1178
1179                 preg_match('/guid="(.*?)"/ism', $attributes, $matches);
1180                 if ($matches[1] != "") {
1181                         $guid = $matches[1];
1182                 }
1183
1184                 return $guid;
1185         }
1186
1187         /**
1188          * @brief Cleans the body of a post if it contains picture links
1189          *
1190          * @param string $body The body
1191          *
1192          * @return string The cleaned body
1193          */
1194         private static function formatPicturePost($body)
1195         {
1196                 $siteinfo = BBCode::getAttachedData($body);
1197
1198                 if (($siteinfo["type"] == "photo")) {
1199                         if (isset($siteinfo["preview"])) {
1200                                 $preview = $siteinfo["preview"];
1201                         } else {
1202                                 $preview = $siteinfo["image"];
1203                         }
1204
1205                         // Is it a remote picture? Then make a smaller preview here
1206                         $preview = proxy_url($preview, false, PROXY_SIZE_SMALL);
1207
1208                         // Is it a local picture? Then make it smaller here
1209                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1210                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1211
1212                         if (isset($siteinfo["url"])) {
1213                                 $url = $siteinfo["url"];
1214                         } else {
1215                                 $url = $siteinfo["image"];
1216                         }
1217
1218                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1219                 }
1220
1221                 return $body;
1222         }
1223
1224         /**
1225          * @brief Adds the header elements to the XML document
1226          *
1227          * @param object $doc    XML document
1228          * @param array  $owner  Contact data of the poster
1229          * @param string $filter The related feed filter (activity, posts or comments)
1230          *
1231          * @return object header root element
1232          */
1233         private static function addHeader($doc, $owner, $filter)
1234         {
1235                 $a = get_app();
1236
1237                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
1238                 $doc->appendChild($root);
1239
1240                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1241                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1242                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1243                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1244                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
1245                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1246                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1247                 $root->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1248
1249                 $title = '';
1250                 switch ($filter) {
1251                         case 'activity': $title = L10n::t('%s\'s timeline', $owner['name']); break;
1252                         case 'posts'   : $title = L10n::t('%s\'s posts'   , $owner['name']); break;
1253                         case 'comments': $title = L10n::t('%s\'s comments', $owner['name']); break;
1254                 }
1255
1256                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1257                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1258                 XML::addElement($doc, $root, "id", System::baseUrl() . "/profile/" . $owner["nick"]);
1259                 XML::addElement($doc, $root, "title", $title);
1260                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], $a->config["sitename"]));
1261                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1262                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1263
1264                 $author = self::addAuthor($doc, $owner);
1265                 $root->appendChild($author);
1266
1267                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1268                 XML::addElement($doc, $root, "link", "", $attributes);
1269
1270                 /// @TODO We have to find out what this is
1271                 /// $attributes = array("href" => System::baseUrl()."/sup",
1272                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1273                 ///             "type" => "application/json");
1274                 /// XML::addElement($doc, $root, "link", "", $attributes);
1275
1276                 self::hublinks($doc, $root, $owner["nick"]);
1277
1278                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1279                 XML::addElement($doc, $root, "link", "", $attributes);
1280
1281                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1282                 XML::addElement($doc, $root, "link", "", $attributes);
1283
1284                 $attributes = ["href" => System::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1285                 XML::addElement($doc, $root, "link", "", $attributes);
1286
1287                 $attributes = ["href" => System::baseUrl() . "/api/statuses/user_timeline/" . $owner["nick"] . ".atom",
1288                         "rel" => "self", "type" => "application/atom+xml"];
1289                 XML::addElement($doc, $root, "link", "", $attributes);
1290
1291                 if ($owner['account-type'] == ACCOUNT_TYPE_COMMUNITY) {
1292                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1293                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1294                         $members = dba::count('contact', $condition);
1295                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1296                 }
1297
1298                 return $root;
1299         }
1300
1301         /**
1302          * @brief Add the link to the push hubs to the XML document
1303          *
1304          * @param object $doc  XML document
1305          * @param object $root XML root element where the hub links are added
1306          * @param object $nick nick
1307          * @return void
1308          */
1309         public static function hublinks($doc, $root, $nick)
1310         {
1311                 $h = System::baseUrl() . '/pubsubhubbub/'.$nick;
1312                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1313         }
1314
1315         /**
1316          * @brief Adds attachment data to the XML document
1317          *
1318          * @param object $doc  XML document
1319          * @param object $root XML root element where the hub links are added
1320          * @param array  $item Data of the item that is to be posted
1321          * @return void
1322          */
1323         private static function getAttachment($doc, $root, $item)
1324         {
1325                 $o = "";
1326                 $siteinfo = BBCode::getAttachedData($item["body"]);
1327
1328                 switch ($siteinfo["type"]) {
1329                         case 'photo':
1330                                 $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1331                                 if ($imgdata) {
1332                                         $attributes = ["rel" => "enclosure",
1333                                                         "href" => $siteinfo["image"],
1334                                                         "type" => $imgdata["mime"],
1335                                                         "length" => intval($imgdata["size"])];
1336                                         XML::addElement($doc, $root, "link", "", $attributes);
1337                                 }
1338                                 break;
1339                         case 'video':
1340                                 $attributes = ["rel" => "enclosure",
1341                                                 "href" => $siteinfo["url"],
1342                                                 "type" => "text/html; charset=UTF-8",
1343                                                 "length" => "",
1344                                                 "title" => $siteinfo["title"]];
1345                                 XML::addElement($doc, $root, "link", "", $attributes);
1346                                 break;
1347                         default:
1348                                 break;
1349                 }
1350
1351                 if (!Config::get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1352                         $imgdata = Image::getInfoFromURL($siteinfo["image"]);
1353                         if ($imgdata) {
1354                                 $attributes = ["rel" => "enclosure",
1355                                                 "href" => $siteinfo["image"],
1356                                                 "type" => $imgdata["mime"],
1357                                                 "length" => intval($imgdata["size"])];
1358
1359                                 XML::addElement($doc, $root, "link", "", $attributes);
1360                         }
1361                 }
1362
1363                 $arr = explode('[/attach],', $item['attach']);
1364                 if (count($arr)) {
1365                         foreach ($arr as $r) {
1366                                 $matches = false;
1367                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1368                                 if ($cnt) {
1369                                         $attributes = ["rel" => "enclosure",
1370                                                         "href" => $matches[1],
1371                                                         "type" => $matches[3]];
1372
1373                                         if (intval($matches[2])) {
1374                                                 $attributes["length"] = intval($matches[2]);
1375                                         }
1376                                         if (trim($matches[4]) != "") {
1377                                                 $attributes["title"] = trim($matches[4]);
1378                                         }
1379                                         XML::addElement($doc, $root, "link", "", $attributes);
1380                                 }
1381                         }
1382                 }
1383         }
1384
1385         /**
1386          * @brief Adds the author element to the XML document
1387          *
1388          * @param object $doc   XML document
1389          * @param array  $owner Contact data of the poster
1390          *
1391          * @return object author element
1392          */
1393         private static function addAuthor($doc, $owner, $show_profile = true)
1394         {
1395                 $profile = dba::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid'], 'is-default' => true]);
1396                 $author = $doc->createElement("author");
1397                 XML::addElement($doc, $author, "id", $owner["url"]);
1398                 if ($owner['account-type'] == ACCOUNT_TYPE_COMMUNITY) {
1399                         XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_GROUP);
1400                 } else {
1401                         XML::addElement($doc, $author, "activity:object-type", ACTIVITY_OBJ_PERSON);
1402                 }
1403                 XML::addElement($doc, $author, "uri", $owner["url"]);
1404                 XML::addElement($doc, $author, "name", $owner["nick"]);
1405                 XML::addElement($doc, $author, "email", $owner["addr"]);
1406                 if ($show_profile) {
1407                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, 7));
1408                 }
1409
1410                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1411                 XML::addElement($doc, $author, "link", "", $attributes);
1412
1413                 $attributes = [
1414                                 "rel" => "avatar",
1415                                 "type" => "image/jpeg", // To-Do?
1416                                 "media:width" => 175,
1417                                 "media:height" => 175,
1418                                 "href" => $owner["photo"]];
1419                 XML::addElement($doc, $author, "link", "", $attributes);
1420
1421                 if (isset($owner["thumb"])) {
1422                         $attributes = [
1423                                         "rel" => "avatar",
1424                                         "type" => "image/jpeg", // To-Do?
1425                                         "media:width" => 80,
1426                                         "media:height" => 80,
1427                                         "href" => $owner["thumb"]];
1428                         XML::addElement($doc, $author, "link", "", $attributes);
1429                 }
1430
1431                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1432                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1433                 if ($show_profile) {
1434                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, 7));
1435
1436                         if (trim($owner["location"]) != "") {
1437                                 $element = $doc->createElement("poco:address");
1438                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1439                                 $author->appendChild($element);
1440                         }
1441                 }
1442
1443                 if (DBM::is_result($profile) && !$show_profile) {
1444                         if (trim($profile["homepage"]) != "") {
1445                                 $urls = $doc->createElement("poco:urls");
1446                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1447                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1448                                 XML::addElement($doc, $urls, "poco:primary", "true");
1449                                 $author->appendChild($urls);
1450                         }
1451
1452                         XML::addElement($doc, $author, "followers", "", ["url" => System::baseUrl()."/viewcontacts/".$owner["nick"]]);
1453                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1454
1455                         if ($profile["publish"]) {
1456                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1457                         }
1458                 }
1459
1460                 return $author;
1461         }
1462
1463         /**
1464          * @TODO Picture attachments should look like this:
1465          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1466          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1467          */
1468
1469         /**
1470          * @brief Returns the given activity if present - otherwise returns the "post" activity
1471          *
1472          * @param array $item Data of the item that is to be posted
1473          *
1474          * @return string activity
1475          */
1476         private static function constructVerb($item)
1477         {
1478                 if ($item['verb']) {
1479                         return $item['verb'];
1480                 }
1481
1482                 return ACTIVITY_POST;
1483         }
1484
1485         /**
1486          * @brief Returns the given object type if present - otherwise returns the "note" object type
1487          *
1488          * @param array $item Data of the item that is to be posted
1489          *
1490          * @return string Object type
1491          */
1492         private static function constructObjecttype($item)
1493         {
1494                 if (in_array($item['object-type'], [ACTIVITY_OBJ_NOTE, ACTIVITY_OBJ_COMMENT]))
1495                         return $item['object-type'];
1496                 return ACTIVITY_OBJ_NOTE;
1497         }
1498
1499         /**
1500          * @brief Adds an entry element to the XML document
1501          *
1502          * @param object $doc      XML document
1503          * @param array  $item     Data of the item that is to be posted
1504          * @param array  $owner    Contact data of the poster
1505          * @param bool   $toplevel optional default false
1506          *
1507          * @return object Entry element
1508          */
1509         private static function entry($doc, $item, $owner, $toplevel = false)
1510         {
1511                 $xml = null;
1512
1513                 $repeated_guid = self::getResharedGuid($item);
1514                 if ($repeated_guid != "") {
1515                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1516                 }
1517
1518                 if ($xml) {
1519                         return $xml;
1520                 }
1521
1522                 if ($item["verb"] == ACTIVITY_LIKE) {
1523                         return self::likeEntry($doc, $item, $owner, $toplevel);
1524                 } elseif (in_array($item["verb"], [ACTIVITY_FOLLOW, NAMESPACE_OSTATUS."/unfollow"])) {
1525                         return self::followEntry($doc, $item, $owner, $toplevel);
1526                 } else {
1527                         return self::noteEntry($doc, $item, $owner, $toplevel);
1528                 }
1529         }
1530
1531         /**
1532          * @brief Adds a source entry to the XML document
1533          *
1534          * @param object $doc     XML document
1535          * @param array  $contact Array of the contact that is added
1536          *
1537          * @return object Source element
1538          */
1539         private static function sourceEntry($doc, $contact)
1540         {
1541                 $source = $doc->createElement("source");
1542                 XML::addElement($doc, $source, "id", $contact["poll"]);
1543                 XML::addElement($doc, $source, "title", $contact["name"]);
1544                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1545                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1546                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1547                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1548
1549                 return $source;
1550         }
1551
1552         /**
1553          * @brief Fetches contact data from the contact or the gcontact table
1554          *
1555          * @param string $url   URL of the contact
1556          * @param array  $owner Contact data of the poster
1557          *
1558          * @return array Contact array
1559          */
1560         private static function contactEntry($url, $owner)
1561         {
1562                 $r = q(
1563                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1564                         dbesc(normalise_link($url)),
1565                         intval($owner["uid"])
1566                 );
1567                 if (DBM::is_result($r)) {
1568                         $contact = $r[0];
1569                         $contact["uid"] = -1;
1570                 }
1571
1572                 if (!DBM::is_result($r)) {
1573                         $r = q(
1574                                 "SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
1575                                 dbesc(normalise_link($url))
1576                         );
1577                         if (DBM::is_result($r)) {
1578                                 $contact = $r[0];
1579                                 $contact["uid"] = -1;
1580                                 $contact["success_update"] = $contact["updated"];
1581                         }
1582                 }
1583
1584                 if (!DBM::is_result($r)) {
1585                         $contact = owner;
1586                 }
1587
1588                 if (!isset($contact["poll"])) {
1589                         $data = Probe::uri($url);
1590                         $contact["poll"] = $data["poll"];
1591
1592                         if (!$contact["alias"]) {
1593                                 $contact["alias"] = $data["alias"];
1594                         }
1595                 }
1596
1597                 if (!isset($contact["alias"])) {
1598                         $contact["alias"] = $contact["url"];
1599                 }
1600
1601                 return $contact;
1602         }
1603
1604         /**
1605          * @brief Adds an entry element with reshared content
1606          *
1607          * @param object $doc           XML document
1608          * @param array  $item          Data of the item that is to be posted
1609          * @param array  $owner         Contact data of the poster
1610          * @param string $repeated_guid guid
1611          * @param bool   $toplevel      Is it for en entry element (false) or a feed entry (true)?
1612          *
1613          * @return object Entry element
1614          */
1615         private static function reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel)
1616         {
1617                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1618                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1619                 }
1620
1621                 $title = self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1622
1623                 $r = q(
1624                         "SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' AND NOT `private` AND `network` IN ('%s', '%s', '%s') LIMIT 1",
1625                         intval($owner["uid"]),
1626                         dbesc($repeated_guid),
1627                         dbesc(NETWORK_DFRN),
1628                         dbesc(NETWORK_DIASPORA),
1629                         dbesc(NETWORK_OSTATUS)
1630                 );
1631                 if (DBM::is_result($r)) {
1632                         $repeated_item = $r[0];
1633                 } else {
1634                         return false;
1635                 }
1636                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1637
1638                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1639
1640                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1641
1642                 self::entryContent($doc, $entry, $item, $owner, $title, ACTIVITY_SHARE, false);
1643
1644                 $as_object = $doc->createElement("activity:object");
1645
1646                 XML::addElement($doc, $as_object, "activity:object-type", NAMESPACE_ACTIVITY_SCHEMA."activity");
1647
1648                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1649
1650                 $author = self::addAuthor($doc, $contact, false);
1651                 $as_object->appendChild($author);
1652
1653                 $as_object2 = $doc->createElement("activity:object");
1654
1655                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1656
1657                 $title = sprintf("New comment by %s", $contact["nick"]);
1658
1659                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1660
1661                 $as_object->appendChild($as_object2);
1662
1663                 self::entryFooter($doc, $as_object, $item, $owner, false);
1664
1665                 $source = self::sourceEntry($doc, $contact);
1666
1667                 $as_object->appendChild($source);
1668
1669                 $entry->appendChild($as_object);
1670
1671                 self::entryFooter($doc, $entry, $item, $owner);
1672
1673                 return $entry;
1674         }
1675
1676         /**
1677          * @brief Adds an entry element with a "like"
1678          *
1679          * @param object $doc      XML document
1680          * @param array  $item     Data of the item that is to be posted
1681          * @param array  $owner    Contact data of the poster
1682          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1683          *
1684          * @return object Entry element with "like"
1685          */
1686         private static function likeEntry($doc, $item, $owner, $toplevel)
1687         {
1688                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1689                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1690                 }
1691
1692                 $title = self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1693
1694                 $verb = NAMESPACE_ACTIVITY_SCHEMA."favorite";
1695                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1696
1697                 $as_object = $doc->createElement("activity:object");
1698
1699                 $parent = q(
1700                         "SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
1701                         dbesc($item["thr-parent"]),
1702                         intval($item["uid"])
1703                 );
1704                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1705
1706                 XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent[0]));
1707
1708                 self::entryContent($doc, $as_object, $parent[0], $owner, "New entry");
1709
1710                 $entry->appendChild($as_object);
1711
1712                 self::entryFooter($doc, $entry, $item, $owner);
1713
1714                 return $entry;
1715         }
1716
1717         /**
1718          * @brief Adds the person object element to the XML document
1719          *
1720          * @param object $doc     XML document
1721          * @param array  $owner   Contact data of the poster
1722          * @param array  $contact Contact data of the target
1723          *
1724          * @return object author element
1725          */
1726         private static function addPersonObject($doc, $owner, $contact)
1727         {
1728                 $object = $doc->createElement("activity:object");
1729                 XML::addElement($doc, $object, "activity:object-type", ACTIVITY_OBJ_PERSON);
1730
1731                 if ($contact['network'] == NETWORK_PHANTOM) {
1732                         XML::addElement($doc, $object, "id", $contact['url']);
1733                         return $object;
1734                 }
1735
1736                 XML::addElement($doc, $object, "id", $contact["alias"]);
1737                 XML::addElement($doc, $object, "title", $contact["nick"]);
1738
1739                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1740                 XML::addElement($doc, $object, "link", "", $attributes);
1741
1742                 $attributes = [
1743                                 "rel" => "avatar",
1744                                 "type" => "image/jpeg", // To-Do?
1745                                 "media:width" => 175,
1746                                 "media:height" => 175,
1747                                 "href" => $contact["photo"]];
1748                 XML::addElement($doc, $object, "link", "", $attributes);
1749
1750                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1751                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1752
1753                 if (trim($contact["location"]) != "") {
1754                         $element = $doc->createElement("poco:address");
1755                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1756                         $object->appendChild($element);
1757                 }
1758
1759                 return $object;
1760         }
1761
1762         /**
1763          * @brief Adds a follow/unfollow entry element
1764          *
1765          * @param object $doc      XML document
1766          * @param array  $item     Data of the follow/unfollow message
1767          * @param array  $owner    Contact data of the poster
1768          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1769          *
1770          * @return object Entry element
1771          */
1772         private static function followEntry($doc, $item, $owner, $toplevel)
1773         {
1774                 $item["id"] = $item["parent"] = 0;
1775                 $item["created"] = $item["edited"] = date("c");
1776                 $item["private"] = true;
1777
1778                 $contact = Probe::uri($item['follow']);
1779
1780                 if ($contact['alias'] == '') {
1781                         $contact['alias'] = $contact["url"];
1782                 } else {
1783                         $item['follow'] = $contact['alias'];
1784                 }
1785
1786                 $r = q(
1787                         "SELECT `id` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1788                         intval($owner['uid']),
1789                         dbesc(normalise_link($contact["url"]))
1790                 );
1791
1792                 if (DBM::is_result($r)) {
1793                         $connect_id = $r[0]['id'];
1794                 } else {
1795                         $connect_id = 0;
1796                 }
1797
1798                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1799                         $message = L10n::t('%s is now following %s.');
1800                         $title = L10n::t('following');
1801                         $action = "subscription";
1802                 } else {
1803                         $message = L10n::t('%s stopped following %s.');
1804                         $title = L10n::t('stopped following');
1805                         $action = "unfollow";
1806                 }
1807
1808                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1809                                 = 'tag:'.get_app()->get_hostname().
1810                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1811                                 ':person:'.$connect_id.':'.$item['created'];
1812
1813                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1814
1815                 self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1816
1817                 self::entryContent($doc, $entry, $item, $owner, $title);
1818
1819                 $object = self::addPersonObject($doc, $owner, $contact);
1820                 $entry->appendChild($object);
1821
1822                 self::entryFooter($doc, $entry, $item, $owner);
1823
1824                 return $entry;
1825         }
1826
1827         /**
1828          * @brief Adds a regular entry element
1829          *
1830          * @param object $doc      XML document
1831          * @param array  $item     Data of the item that is to be posted
1832          * @param array  $owner    Contact data of the poster
1833          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1834          *
1835          * @return object Entry element
1836          */
1837         private static function noteEntry($doc, $item, $owner, $toplevel)
1838         {
1839                 if (($item["id"] != $item["parent"]) && (normalise_link($item["author-link"]) != normalise_link($owner["url"]))) {
1840                         logger("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", LOGGER_DEBUG);
1841                 }
1842
1843                 $title = self::entryHeader($doc, $entry, $owner, $item, $toplevel);
1844
1845                 XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1846
1847                 self::entryContent($doc, $entry, $item, $owner, $title);
1848
1849                 self::entryFooter($doc, $entry, $item, $owner);
1850
1851                 return $entry;
1852         }
1853
1854         /**
1855          * @brief Adds a header element to the XML document
1856          *
1857          * @param object $doc      XML document
1858          * @param object $entry    The entry element where the elements are added
1859          * @param array  $owner    Contact data of the poster
1860          * @param bool   $toplevel Is it for en entry element (false) or a feed entry (true)?
1861          *
1862          * @return string The title for the element
1863          */
1864         private static function entryHeader($doc, &$entry, $owner, $item, $toplevel)
1865         {
1866                 /// @todo Check if this title stuff is really needed (I guess not)
1867                 if (!$toplevel) {
1868                         $entry = $doc->createElement("entry");
1869                         $title = sprintf("New note by %s", $owner["nick"]);
1870
1871                         if ($owner['account-type'] == ACCOUNT_TYPE_COMMUNITY) {
1872                                 $contact = self::contactEntry($item['author-link'], $owner);
1873                                 $author = self::addAuthor($doc, $contact, false);
1874                                 $entry->appendChild($author);
1875                         }
1876                 } else {
1877                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, "entry");
1878
1879                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
1880                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
1881                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
1882                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
1883                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
1884                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
1885                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
1886                         $entry->setAttribute("xmlns:mastodon", NAMESPACE_MASTODON);
1887
1888                         $author = self::addAuthor($doc, $owner);
1889                         $entry->appendChild($author);
1890
1891                         $title = sprintf("New comment by %s", $owner["nick"]);
1892                 }
1893                 return $title;
1894         }
1895
1896         /**
1897          * @brief Adds elements to the XML document
1898          *
1899          * @param object $doc      XML document
1900          * @param object $entry    Entry element where the content is added
1901          * @param array  $item     Data of the item that is to be posted
1902          * @param array  $owner    Contact data of the poster
1903          * @param string $title    Title for the post
1904          * @param string $verb     The activity verb
1905          * @param bool   $complete Add the "status_net" element?
1906          * @return void
1907          */
1908         private static function entryContent($doc, $entry, $item, $owner, $title, $verb = "", $complete = true)
1909         {
1910                 if ($verb == "") {
1911                         $verb = self::constructVerb($item);
1912                 }
1913
1914                 XML::addElement($doc, $entry, "id", $item["uri"]);
1915                 XML::addElement($doc, $entry, "title", $title);
1916
1917                 $body = self::formatPicturePost($item['body']);
1918
1919                 if ($item['title'] != "") {
1920                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1921                 }
1922
1923                 $body = BBCode::convert($body, false, 7);
1924
1925                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1926
1927                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1928                                                                 "href" => System::baseUrl()."/display/".$item["guid"]]
1929                 );
1930
1931                 if ($complete && ($item["id"] > 0)) {
1932                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1933                 }
1934
1935                 XML::addElement($doc, $entry, "activity:verb", $verb);
1936
1937                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1938                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1939         }
1940
1941         /**
1942          * @brief Adds the elements at the foot of an entry to the XML document
1943          *
1944          * @param object $doc      XML document
1945          * @param object $entry    The entry element where the elements are added
1946          * @param array  $item     Data of the item that is to be posted
1947          * @param array  $owner    Contact data of the poster
1948          * @param bool   $complete default true
1949          * @return void
1950          */
1951         private static function entryFooter($doc, $entry, $item, $owner, $complete = true)
1952         {
1953                 $mentioned = [];
1954
1955                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
1956                         $parent = q("SELECT `guid`, `author-link`, `owner-link` FROM `item` WHERE `id` = %d", intval($item["parent"]));
1957                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1958
1959                         $thrparent = q(
1960                                 "SELECT `guid`, `author-link`, `owner-link`, `plink` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
1961                                 intval($owner["uid"]),
1962                                 dbesc($parent_item)
1963                         );
1964                         if ($thrparent) {
1965                                 $mentioned[$thrparent[0]["author-link"]] = $thrparent[0]["author-link"];
1966                                 $mentioned[$thrparent[0]["owner-link"]] = $thrparent[0]["owner-link"];
1967                                 $parent_plink = $thrparent[0]["plink"];
1968                         } else {
1969                                 $mentioned[$parent[0]["author-link"]] = $parent[0]["author-link"];
1970                                 $mentioned[$parent[0]["owner-link"]] = $parent[0]["owner-link"];
1971                                 $parent_plink = System::baseUrl()."/display/".$parent[0]["guid"];
1972                         }
1973
1974                         $attributes = [
1975                                         "ref" => $parent_item,
1976                                         "href" => $parent_plink];
1977                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1978
1979                         $attributes = [
1980                                         "rel" => "related",
1981                                         "href" => $parent_plink];
1982                         XML::addElement($doc, $entry, "link", "", $attributes);
1983                 }
1984
1985                 if (intval($item["parent"]) > 0) {
1986                         $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
1987                         $conversation_uri = $conversation_href;
1988
1989                         if (isset($parent_item)) {
1990                                 $r = dba::fetch_first("SELECT `conversation-uri`, `conversation-href` FROM `conversation` WHERE `item-uri` = ?", $parent_item);
1991                                 if (DBM::is_result($r)) {
1992                                         if ($r['conversation-uri'] != '') {
1993                                                 $conversation_uri = $r['conversation-uri'];
1994                                         }
1995                                         if ($r['conversation-href'] != '') {
1996                                                 $conversation_href = $r['conversation-href'];
1997                                         }
1998                                 }
1999                         }
2000
2001                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
2002
2003                         $attributes = [
2004                                         "href" => $conversation_href,
2005                                         "local_id" => $item["parent"],
2006                                         "ref" => $conversation_uri];
2007
2008                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
2009                 }
2010
2011                 $tags = item::getFeedTags($item);
2012
2013                 if (count($tags)) {
2014                         foreach ($tags as $t) {
2015                                 if ($t[0] == "@") {
2016                                         $mentioned[$t[1]] = $t[1];
2017                                 }
2018                         }
2019                 }
2020
2021                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
2022                 $newmentions = [];
2023                 foreach ($mentioned as $mention) {
2024                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
2025                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
2026                 }
2027                 $mentioned = $newmentions;
2028
2029                 foreach ($mentioned as $mention) {
2030                         $condition = ['uid' => $owner['uid'], 'nurl' => normalise_link($mention)];
2031                         $contact = dba::selectFirst('contact', ['forum', 'prv', 'self', 'contact-type'], $condition);
2032                         if ($contact["forum"] || $contact["prv"] || ($owner['contact-type'] == ACCOUNT_TYPE_COMMUNITY) ||
2033                                 ($contact['self'] && ($owner['account-type'] == ACCOUNT_TYPE_COMMUNITY))) {
2034                                 XML::addElement($doc, $entry, "link", "",
2035                                         [
2036                                                 "rel" => "mentioned",
2037                                                 "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
2038                                                 "href" => $mention]
2039                                 );
2040                         } else {
2041                                 XML::addElement($doc, $entry, "link", "",
2042                                         [
2043                                                 "rel" => "mentioned",
2044                                                 "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
2045                                                 "href" => $mention]
2046                                 );
2047                         }
2048                 }
2049
2050                 if ($owner['account-type'] == ACCOUNT_TYPE_COMMUNITY) {
2051                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2052                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2053                                                                         "href" => $owner['url']]);
2054                 }
2055
2056                 if (!$item["private"]) {
2057                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2058                                                                         "href" => "http://activityschema.org/collection/public"]);
2059                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2060                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2061                                                                         "href" => "http://activityschema.org/collection/public"]);
2062                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2063                 }
2064
2065                 if (count($tags)) {
2066                         foreach ($tags as $t) {
2067                                 if ($t[0] != "@") {
2068                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2069                                 }
2070                         }
2071                 }
2072
2073                 self::getAttachment($doc, $entry, $item);
2074
2075                 if ($complete && ($item["id"] > 0)) {
2076                         $app = $item["app"];
2077                         if ($app == "") {
2078                                 $app = "web";
2079                         }
2080
2081                         $attributes = ["local_id" => $item["id"], "source" => $app];
2082
2083                         if (isset($parent["id"])) {
2084                                 $attributes["repeat_of"] = $parent["id"];
2085                         }
2086
2087                         if ($item["coord"] != "") {
2088                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2089                         }
2090
2091                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2092                 }
2093         }
2094
2095         /**
2096          * Creates the XML feed for a given nickname
2097          *
2098          * Supported filters:
2099          * - activity (default): all the public posts
2100          * - posts: all the public top-level posts
2101          * - comments: all the public replies
2102          *
2103          * Updates the provided last_update parameter if the result comes from the
2104          * cache or it is empty
2105          *
2106          * @brief Creates the XML feed for a given nickname
2107          *
2108          * @param string  $owner_nick  Nickname of the feed owner
2109          * @param string  $last_update Date of the last update
2110          * @param integer $max_items   Number of maximum items to fetch
2111          * @param string  $filter      Feed items filter (activity, posts or comments)
2112          * @param boolean $nocache     Wether to bypass caching
2113          *
2114          * @return string XML feed
2115          */
2116         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false)
2117         {
2118                 $stamp = microtime(true);
2119
2120                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2121
2122                 $previous_created = $last_update;
2123
2124                 $result = Cache::get($cachekey);
2125                 if (!$nocache && !is_null($result)) {
2126                         logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', LOGGER_DEBUG);
2127                         $last_update = $result['last_update'];
2128                         return $result['feed'];
2129                 }
2130
2131                 $owner = dba::fetch_first(
2132                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
2133                                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
2134                                 WHERE `contact`.`self` AND `user`.`nickname` = ? LIMIT 1",
2135                         $owner_nick
2136                 );
2137                 if (!DBM::is_result($owner)) {
2138                         return;
2139                 }
2140
2141                 if (!strlen($last_update)) {
2142                         $last_update = 'now -30 days';
2143                 }
2144
2145                 $check_date = DateTimeFormat::utc($last_update);
2146                 $authorid = Contact::getIdForURL($owner["url"], 0, true);
2147
2148                 $sql_extra = '';
2149                 if ($filter === 'posts') {
2150                         $sql_extra .= ' AND `item`.`id` = `item`.`parent` ';
2151                 }
2152
2153                 if ($filter === 'comments') {
2154                         $sql_extra .= sprintf(" AND `item`.`object-type` = '%s' ", dbesc(ACTIVITY_OBJ_COMMENT));
2155                 }
2156
2157                 if ($owner['account-type'] != ACCOUNT_TYPE_COMMUNITY) {
2158                         $sql_extra .= sprintf(" AND `item`.`contact-id` = %d AND `item`.`author-id` = %d ", intval($owner["id"]), intval($authorid));
2159                 }
2160
2161                 $items = q(
2162                         "SELECT `item`.*, `item`.`id` AS `item_id` FROM `item` USE INDEX (`uid_contactid_created`)
2163                                 STRAIGHT_JOIN `thread` ON `thread`.`iid` = `item`.`parent`
2164                                 WHERE `item`.`uid` = %d
2165                                 AND `item`.`created` > '%s'
2166                                 AND NOT `item`.`deleted`
2167                                 AND NOT `item`.`private`
2168                                 AND `item`.`visible`
2169                                 AND `item`.`wall`
2170                                 AND `thread`.`network` IN ('%s', '%s')
2171                                 $sql_extra
2172                                 ORDER BY `item`.`created` DESC LIMIT %d",
2173                         intval($owner["uid"]),
2174                         dbesc($check_date),
2175                         dbesc(NETWORK_OSTATUS),
2176                         dbesc(NETWORK_DFRN),
2177                         intval($max_items)
2178                 );
2179
2180                 $doc = new DOMDocument('1.0', 'utf-8');
2181                 $doc->formatOutput = true;
2182
2183                 $root = self::addHeader($doc, $owner, $filter);
2184
2185                 foreach ($items as $item) {
2186                         if (Config::get('system', 'ostatus_debug')) {
2187                                 $item['body'] .= '🍼';
2188                         }
2189                         $entry = self::entry($doc, $item, $owner);
2190                         $root->appendChild($entry);
2191
2192                         if ($last_update < $item['created']) {
2193                                 $last_update = $item['created'];
2194                         }
2195                 }
2196
2197                 $feeddata = trim($doc->saveXML());
2198
2199                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2200                 Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
2201
2202                 logger('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, LOGGER_DEBUG);
2203
2204                 return $feeddata;
2205         }
2206
2207         /**
2208          * @brief Creates the XML for a salmon message
2209          *
2210          * @param array $item  Data of the item that is to be posted
2211          * @param array $owner Contact data of the poster
2212          *
2213          * @return string XML for the salmon
2214          */
2215         public static function salmon($item, $owner)
2216         {
2217                 $doc = new DOMDocument('1.0', 'utf-8');
2218                 $doc->formatOutput = true;
2219
2220                 if (Config::get('system', 'ostatus_debug')) {
2221                         $item['body'] .= '🐟';
2222                 }
2223
2224                 $entry = self::entry($doc, $item, $owner, true);
2225
2226                 $doc->appendChild($entry);
2227
2228                 return trim($doc->saveXML());
2229         }
2230 }