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1 <?php
2 /**
3  * @file include/diaspora.php
4  * @brief The implementation of the diaspora protocol
5  */
6
7 require_once("include/items.php");
8 require_once("include/bb2diaspora.php");
9 require_once("include/Scrape.php");
10 require_once("include/Contact.php");
11 require_once("include/Photo.php");
12 require_once("include/socgraph.php");
13 require_once("include/group.php");
14 require_once("include/api.php");
15
16 /**
17  * @brief This class contain functions to work with XML data
18  *
19  */
20 class xml {
21         function from_array($array, &$xml) {
22
23                 if (!is_object($xml)) {
24                         foreach($array as $key => $value) {
25                                 $root = new SimpleXMLElement('<'.$key.'/>');
26                                 array_to_xml($value, $root);
27
28                                 $dom = dom_import_simplexml($root)->ownerDocument;
29                                 $dom->formatOutput = true;
30                                 return $dom->saveXML();
31                         }
32                 }
33
34                 foreach($array as $key => $value) {
35                         if (!is_array($value) AND !is_numeric($key))
36                                 $xml->addChild($key, $value);
37                         elseif (is_array($value))
38                                 array_to_xml($value, $xml->addChild($key));
39                 }
40         }
41
42         function copy(&$source, &$target, $elementname) {
43                 if (count($source->children()) == 0)
44                         $target->addChild($elementname, $source);
45                 else {
46                         $child = $target->addChild($elementname);
47                         foreach ($source->children() AS $childfield => $childentry)
48                                 self::copy($childentry, $child, $childfield);
49                 }
50         }
51 }
52
53 /**
54  * @brief This class contain functions to create and send Diaspora XML files
55  *
56  */
57 class diaspora {
58
59         /**
60          * @brief Dispatches public messages and find the fitting receivers
61          *
62          * @param array $msg The post that will be dispatched
63          *
64          * @return bool Was the message accepted?
65          */
66         public static function dispatch_public($msg) {
67
68                 $enabled = intval(get_config("system", "diaspora_enabled"));
69                 if (!$enabled) {
70                         logger("diaspora is disabled");
71                         return false;
72                 }
73
74                 // Use a dummy importer to import the data for the public copy
75                 $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
76                 $item_id = self::dispatch($importer,$msg);
77
78                 // Now distribute it to the followers
79                 $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
80                         (SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s')
81                         AND NOT `account_expired` AND NOT `account_removed`",
82                         dbesc(NETWORK_DIASPORA),
83                         dbesc($msg["author"])
84                 );
85                 if(count($r)) {
86                         foreach($r as $rr) {
87                                 logger("delivering to: ".$rr["username"]);
88                                 self::dispatch($rr,$msg);
89                         }
90                 } else
91                         logger("No subscribers for ".$msg["author"]." ".print_r($msg, true));
92
93                 return $item_id;
94         }
95
96         /**
97          * @brief Dispatches the different message types to the different functions
98          *
99          * @param array $importer Array of the importer user
100          * @param array $msg The post that will be dispatched
101          *
102          * @return bool Was the message accepted?
103          */
104         public static function dispatch($importer, $msg) {
105
106                 // The sender is the handle of the contact that sent the message.
107                 // This will often be different with relayed messages (for example "like" and "comment")
108                 $sender = $msg["author"];
109
110                 if (!diaspora::valid_posting($msg, $fields)) {
111                         logger("Invalid posting");
112                         return false;
113                 }
114
115                 $type = $fields->getName();
116
117                 switch ($type) {
118                         case "account_deletion": // Done
119                                 return true;
120                                 //return self::import_account_deletion($importer, $fields);
121
122                         case "comment": // Done
123                                 return true;
124                                 //return self::import_comment($importer, $sender, $fields);
125
126                         case "conversation":
127                                 //return true;
128                                 return self::import_conversation($importer, $fields);
129
130                         case "like": // Done
131                                 return true;
132                                 //return self::import_like($importer, $sender, $fields);
133
134                         case "message": // Done
135                                 return true;
136                                 //return self::import_message($importer, $fields);
137
138                         case "participation": // Not implemented
139                                 return self::import_participation($importer, $fields);
140
141                         case "photo": // Not needed
142                                 return self::import_photo($importer, $fields);
143
144                         case "poll_participation": // Not implemented
145                                 return self::import_poll_participation($importer, $fields);
146
147                         case "profile": // Done
148                                 return true;
149                                 //return self::import_profile($importer, $fields);
150
151                         case "request":
152                                 //return true;
153                                 return self::import_request($importer, $fields);
154
155                         case "reshare": // Done
156                                 return true;
157                                 //return self::import_reshare($importer, $fields);
158
159                         case "retraction": // Done
160                                 return true;
161                                 //return self::import_retraction($importer, $sender, $fields);
162
163                         case "status_message":
164                                 //return true;
165                                 return self::import_status_message($importer, $fields);
166
167                         default:
168                                 logger("Unknown message type ".$type);
169                                 return false;
170                 }
171
172                 return true;
173         }
174
175         /**
176          * @brief Checks if a posting is valid and fetches the data fields.
177          *
178          * This function does not only check the signature.
179          * It also does the conversion between the old and the new diaspora format.
180          *
181          * @param array $msg Array with the XML, the sender handle and the sender signature
182          * @param object $fields SimpleXML object that contains the posting when it is valid
183          *
184          * @return bool Is the posting valid?
185          */
186         private function valid_posting($msg, &$fields) {
187
188                 $data = parse_xml_string($msg["message"], false);
189
190                 if (!is_object($data))
191                         return false;
192
193                 $first_child = $data->getName();
194
195                 // Is this the new or the old version?
196                 if ($data->getName() == "XML") {
197                         $oldXML = true;
198                         foreach ($data->post->children() as $child)
199                                 $element = $child;
200                 } else {
201                         $oldXML = false;
202                         $element = $data;
203                 }
204
205                 $type = $element->getName();
206                 $orig_type = $type;
207
208                 // All retractions are handled identically from now on.
209                 // In the new version there will only be "retraction".
210                 if (in_array($type, array("signed_retraction", "relayable_retraction")))
211                         $type = "retraction";
212
213                 $fields = new SimpleXMLElement("<".$type."/>");
214
215                 $signed_data = "";
216
217                 foreach ($element->children() AS $fieldname => $entry) {
218                         if ($oldXML) {
219                                 // Translation for the old XML structure
220                                 if ($fieldname == "diaspora_handle")
221                                         $fieldname = "author";
222
223                                 if ($fieldname == "participant_handles")
224                                         $fieldname = "participants";
225
226                                 if (in_array($type, array("like", "participation"))) {
227                                         if ($fieldname == "target_type")
228                                                 $fieldname = "parent_type";
229                                 }
230
231                                 if ($fieldname == "sender_handle")
232                                         $fieldname = "author";
233
234                                 if ($fieldname == "recipient_handle")
235                                         $fieldname = "recipient";
236
237                                 if ($fieldname == "root_diaspora_id")
238                                         $fieldname = "root_author";
239
240                                 if ($type == "retraction") {
241                                         if ($fieldname == "post_guid")
242                                                 $fieldname = "target_guid";
243
244                                         if ($fieldname == "type")
245                                                 $fieldname = "target_type";
246                                 }
247                         }
248
249                         if ($fieldname == "author_signature")
250                                 $author_signature = base64_decode($entry);
251                         elseif ($fieldname == "parent_author_signature")
252                                 $parent_author_signature = base64_decode($entry);
253                         elseif ($fieldname != "target_author_signature") {
254                                 if ($signed_data != "") {
255                                         $signed_data .= ";";
256                                         $signed_data_parent .= ";";
257                                 }
258
259                                 $signed_data .= $entry;
260                         }
261                         if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) OR
262                                 ($orig_type == "relayable_retraction"))
263                                 xml::copy($entry, $fields, $fieldname);
264                 }
265
266                 // This is something that shouldn't happen at all.
267                 if (in_array($type, array("status_message", "reshare", "profile")))
268                         if ($msg["author"] != $fields->author) {
269                                 logger("Message handle is not the same as envelope sender. Quitting this message.");
270                                 return false;
271                         }
272
273                 // Only some message types have signatures. So we quit here for the other types.
274                 if (!in_array($type, array("comment", "message", "like")))
275                         return true;
276
277                 // No author_signature? This is a must, so we quit.
278                 if (!isset($author_signature))
279                         return false;
280
281                 if (isset($parent_author_signature)) {
282                         $key = self::get_key($msg["author"]);
283
284                         if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256"))
285                                 return false;
286                 }
287
288                 $key = self::get_key($fields->author);
289
290                 return rsa_verify($signed_data, $author_signature, $key, "sha256");
291         }
292
293         /**
294          * @brief Fetches the public key for a given handle
295          *
296          * @param string $handle The handle
297          *
298          * @return string The public key
299          */
300         private function get_key($handle) {
301                 logger("Fetching diaspora key for: ".$handle);
302
303                 $r = self::get_person_by_handle($handle);
304                 if($r)
305                         return $r["pubkey"];
306
307                 return "";
308         }
309
310         /**
311          * @brief Fetches data for a given handle
312          *
313          * @param string $handle The handle
314          *
315          * @return array the queried data
316          */
317         private function get_person_by_handle($handle) {
318
319                 $r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
320                         dbesc(NETWORK_DIASPORA),
321                         dbesc($handle)
322                 );
323                 if (count($r)) {
324                         $person = $r[0];
325                         logger("In cache ".print_r($r,true), LOGGER_DEBUG);
326
327                         // update record occasionally so it doesn't get stale
328                         $d = strtotime($person["updated"]." +00:00");
329                         if ($d < strtotime("now - 14 days"))
330                                 $update = true;
331                 }
332
333                 if (!$person OR $update) {
334                         logger("create or refresh", LOGGER_DEBUG);
335                         $r = probe_url($handle, PROBE_DIASPORA);
336
337                         // Note that Friendica contacts will return a "Diaspora person"
338                         // if Diaspora connectivity is enabled on their server
339                         if (count($r) AND ($r["network"] === NETWORK_DIASPORA)) {
340                                 self::add_fcontact($r, $update);
341                                 $person = $r;
342                         }
343                 }
344                 return $person;
345         }
346
347         /**
348          * @brief Updates the fcontact table
349          *
350          * @param array $arr The fcontact data
351          * @param bool $update Update or insert?
352          *
353          * @return string The id of the fcontact entry
354          */
355         private function add_fcontact($arr, $update = false) {
356                 /// @todo Remove this function from include/network.php
357
358                 if($update) {
359                         $r = q("UPDATE `fcontact` SET
360                                         `name` = '%s',
361                                         `photo` = '%s',
362                                         `request` = '%s',
363                                         `nick` = '%s',
364                                         `addr` = '%s',
365                                         `batch` = '%s',
366                                         `notify` = '%s',
367                                         `poll` = '%s',
368                                         `confirm` = '%s',
369                                         `alias` = '%s',
370                                         `pubkey` = '%s',
371                                         `updated` = '%s'
372                                 WHERE `url` = '%s' AND `network` = '%s'",
373                                         dbesc($arr["name"]),
374                                         dbesc($arr["photo"]),
375                                         dbesc($arr["request"]),
376                                         dbesc($arr["nick"]),
377                                         dbesc($arr["addr"]),
378                                         dbesc($arr["batch"]),
379                                         dbesc($arr["notify"]),
380                                         dbesc($arr["poll"]),
381                                         dbesc($arr["confirm"]),
382                                         dbesc($arr["alias"]),
383                                         dbesc($arr["pubkey"]),
384                                         dbesc(datetime_convert()),
385                                         dbesc($arr["url"]),
386                                         dbesc($arr["network"])
387                                 );
388                 } else {
389                         $r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`,
390                                         `batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`)
391                                 VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",
392                                         dbesc($arr["url"]),
393                                         dbesc($arr["name"]),
394                                         dbesc($arr["photo"]),
395                                         dbesc($arr["request"]),
396                                         dbesc($arr["nick"]),
397                                         dbesc($arr["addr"]),
398                                         dbesc($arr["batch"]),
399                                         dbesc($arr["notify"]),
400                                         dbesc($arr["poll"]),
401                                         dbesc($arr["confirm"]),
402                                         dbesc($arr["network"]),
403                                         dbesc($arr["alias"]),
404                                         dbesc($arr["pubkey"]),
405                                         dbesc(datetime_convert())
406                                 );
407                 }
408
409                 return $r;
410         }
411
412         private function get_contact_by_handle($uid, $handle) {
413                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
414                         intval($uid),
415                         dbesc($handle)
416                 );
417
418                 if ($r AND count($r))
419                         return $r[0];
420
421                 $handle_parts = explode("@", $handle);
422                 $nurl_sql = '%%://' . $handle_parts[1] . '%%/profile/' . $handle_parts[0];
423                 $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `nurl` LIKE '%s' LIMIT 1",
424                         dbesc(NETWORK_DFRN),
425                         intval($uid),
426                         dbesc($nurl_sql)
427                 );
428                 if($r AND count($r))
429                         return $r[0];
430
431                 return false;
432         }
433
434         private function post_allow($importer, $contact, $is_comment = false) {
435
436                 // perhaps we were already sharing with this person. Now they're sharing with us.
437                 // That makes us friends.
438                 // Normally this should have handled by getting a request - but this could get lost
439                 if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
440                         q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
441                                 intval(CONTACT_IS_FRIEND),
442                                 intval($contact["id"]),
443                                 intval($importer["uid"])
444                         );
445                         $contact["rel"] = CONTACT_IS_FRIEND;
446                         logger("defining user ".$contact["nick"]." as friend");
447                 }
448
449                 if(($contact["blocked"]) || ($contact["readonly"]) || ($contact["archive"]))
450                         return false;
451                 if($contact["rel"] == CONTACT_IS_SHARING || $contact["rel"] == CONTACT_IS_FRIEND)
452                         return true;
453                 if($contact["rel"] == CONTACT_IS_FOLLOWER)
454                         if(($importer["page-flags"] == PAGE_COMMUNITY) OR $is_comment)
455                                 return true;
456
457                 // Messages for the global users are always accepted
458                 if ($importer["uid"] == 0)
459                         return true;
460
461                 return false;
462         }
463
464         private function get_allowed_contact_by_handle($importer, $handle, $is_comment = false) {
465                 $contact = self::get_contact_by_handle($importer["uid"], $handle);
466                 if (!$contact) {
467                         logger("A Contact for handle ".$handle." and user ".$importer["uid"]." was not found");
468                         return false;
469                 }
470
471                 if (!self::post_allow($importer, $contact, false)) {
472                         logger("The handle: ".$handle." is not allowed to post to user ".$importer["uid"]);
473                         return false;
474                 }
475                 return $contact;
476         }
477
478         private function message_exists($uid, $guid) {
479                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
480                         intval($uid),
481                         dbesc($guid)
482                 );
483
484                 if(count($r)) {
485                         logger("message ".$guid." already exists for user ".$uid);
486                         return false;
487                 }
488
489                 return true;
490         }
491
492         private function fetch_guid($item) {
493                 preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
494                         function ($match) use ($item){
495                                 return(self::fetch_guid_sub($match, $item));
496                         },$item["body"]);
497         }
498
499         private function fetch_guid_sub($match, $item) {
500                 if (!self::store_by_guid($match[1], $item["author-link"]))
501                         self::store_by_guid($match[1], $item["owner-link"]);
502         }
503
504         private function store_by_guid($guid, $server, $uid = 0) {
505                 $serverparts = parse_url($server);
506                 $server = $serverparts["scheme"]."://".$serverparts["host"];
507
508                 logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
509
510                 $msg = self::fetch_message($guid, $server);
511
512                 if (!$msg)
513                         return false;
514
515                 logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
516
517                 // Now call the dispatcher
518                 return self::dispatch_public($msg);
519         }
520
521         private function fetch_message($guid, $server, $level = 0) {
522
523                 if ($level > 5)
524                         return false;
525
526                 // This will work for Diaspora and newer Friendica servers
527                 $source_url = $server."/p/".$guid.".xml";
528                 $x = fetch_url($source_url);
529                 if(!$x)
530                         return false;
531
532                 $source_xml = parse_xml_string($x, false);
533
534                 if (!is_object($source_xml))
535                         return false;
536
537                 if ($source_xml->post->reshare) {
538                         // Reshare of a reshare - old Diaspora version
539                         return self::fetch_message($source_xml->post->reshare->root_guid, $server, ++$level);
540                 } elseif ($source_xml->getName() == "reshare") {
541                         // Reshare of a reshare - new Diaspora version
542                         return self::fetch_message($source_xml->root_guid, $server, ++$level);
543                 }
544
545                 // Fetch the author - for the old and the new Diaspora version
546                 if ($source_xml->post->status_message->diaspora_handle)
547                         $author = (string)$source_xml->post->status_message->diaspora_handle;
548                 elseif ($source_xml->author)
549                         $author = (string)$source_xml->author;
550
551                 if (!$author)
552                         return false;
553
554                 $msg = array("message" => $x, "author" => $author);
555
556                 // We don't really need this, but until the work is unfinished we better will keep this
557                 $msg["key"] = self::get_key($msg["author"]);
558
559                 return $msg;
560         }
561
562         private function fetch_parent_item($uid, $guid, $author, $contact) {
563                 $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
564                                 `author-name`, `author-link`, `author-avatar`,
565                                 `owner-name`, `owner-link`, `owner-avatar`
566                         FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
567                         intval($uid), dbesc($guid));
568
569                 if(!count($r)) {
570                         $result = self::store_by_guid($guid, $contact["url"], $uid);
571
572                         if (!$result) {
573                                 $person = self::get_person_by_handle($author);
574                                 $result = self::store_by_guid($guid, $person["url"], $uid);
575                         }
576
577                         if ($result) {
578                                 logger("Fetched missing item ".$guid." - result: ".$result, LOGGER_DEBUG);
579
580                                 $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
581                                                 `author-name`, `author-link`, `author-avatar`,
582                                                 `owner-name`, `owner-link`, `owner-avatar`
583                                         FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
584                                         intval($uid), dbesc($guid));
585                         }
586                 }
587
588                 if (!count($r)) {
589                         logger("parent item not found: parent: ".$guid." item: ".$guid);
590                         return false;
591                 } else
592                         return $r[0];
593         }
594
595         private function get_author_contact_by_url($contact, $person, $uid) {
596
597                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
598                         dbesc(normalise_link($person["url"])), intval($uid));
599                 if ($r) {
600                         $cid = $r[0]["id"];
601                         $network = $r[0]["network"];
602                 } else {
603                         $cid = $contact["id"];
604                         $network = NETWORK_DIASPORA;
605                 }
606
607                 return (array("cid" => $cid, "network" => $network));
608         }
609
610         public static function is_redmatrix($url) {
611                 return(strstr($url, "/channel/"));
612         }
613
614         private function plink($addr, $guid) {
615                 $r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr));
616
617                 // Fallback
618                 if (!$r)
619                         return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid;
620
621                 // Friendica contacts are often detected as Diaspora contacts in the "fcontact" table
622                 // So we try another way as well.
623                 $s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"])));
624                 if ($s)
625                         $r[0]["network"] = $s[0]["network"];
626
627                 if ($r[0]["network"] == NETWORK_DFRN)
628                         return(str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/"));
629
630                 if (self::is_redmatrix($r[0]["url"]))
631                         return $r[0]["url"]."/?f=&mid=".$guid;
632
633                 return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid;
634         }
635
636         private function import_account_deletion($importer, $data) {
637                 $author = notags(unxmlify($data->author));
638
639                 $contact = self::get_contact_by_handle($importer["uid"], $author);
640                 if (!$contact) {
641                         logger("cannot find contact for author: ".$author);
642                         return false;
643                 }
644
645                 // We now remove the contact
646                 contact_remove($contact["id"]);
647                 return true;
648         }
649
650         private function import_comment($importer, $sender, $data) {
651                 $guid = notags(unxmlify($data->guid));
652                 $parent_guid = notags(unxmlify($data->parent_guid));
653                 $text = unxmlify($data->text);
654                 $author = notags(unxmlify($data->author));
655
656                 $contact = self::get_allowed_contact_by_handle($importer, $sender, true);
657                 if (!$contact)
658                         return false;
659
660                 if (self::message_exists($importer["uid"], $guid))
661                         return false;
662
663                 $parent_item = self::fetch_parent_item($importer["uid"], $parent_guid, $author, $contact);
664                 if (!$parent_item)
665                         return false;
666
667                 $person = self::get_person_by_handle($author);
668                 if (!is_array($person)) {
669                         logger("unable to find author details");
670                         return false;
671                 }
672
673                 // Fetch the contact id - if we know this contact
674                 $author_contact = self::get_author_contact_by_url($contact, $person, $importer["uid"]);
675
676                 $datarray = array();
677
678                 $datarray["uid"] = $importer["uid"];
679                 $datarray["contact-id"] = $author_contact["cid"];
680                 $datarray["network"]  = $author_contact["network"];
681
682                 $datarray["author-name"] = $person["name"];
683                 $datarray["author-link"] = $person["url"];
684                 $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
685
686                 $datarray["owner-name"] = $contact["name"];
687                 $datarray["owner-link"] = $contact["url"];
688                 $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
689
690                 $datarray["guid"] = $guid;
691                 $datarray["uri"] = $author.":".$guid;
692
693                 $datarray["type"] = "remote-comment";
694                 $datarray["verb"] = ACTIVITY_POST;
695                 $datarray["gravity"] = GRAVITY_COMMENT;
696                 $datarray["parent-uri"] = $parent_item["uri"];
697
698                 $datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
699                 $datarray["object"] = json_encode($data);
700
701                 $datarray["body"] = diaspora2bb($text);
702
703                 self::fetch_guid($datarray);
704
705                 $message_id = item_store($datarray);
706                 // print_r($datarray);
707
708                 // If we are the origin of the parent we store the original data and notify our followers
709                 if($message_id AND $parent_item["origin"]) {
710
711                         // Formerly we stored the signed text, the signature and the author in different fields.
712                         // We now store the raw data so that we are more flexible.
713                         q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
714                                 intval($message_id),
715                                 dbesc(json_encode($data))
716                         );
717
718                         // notify others
719                         proc_run("php", "include/notifier.php", "comment-import", $message_id);
720                 }
721
722                 return $message_id;
723         }
724
725         private function import_conversation($importer, $data) {
726                 // @todo
727                 print_r($data);
728                 die();
729 /*
730         $guid = notags(unxmlify($xml->guid));
731         $subject = notags(unxmlify($xml->subject));
732         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
733         $participant_handles = notags(unxmlify($xml->participant_handles));
734         $created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
735
736         $parent_uri = $diaspora_handle . ':' . $guid;
737
738         $messages = $xml->message;
739
740         if(! count($messages)) {
741                 logger('empty conversation');
742                 return;
743         }
744
745                 $contact = self::get_allowed_contact_by_handle($importer, $sender, true)
746                 if (!$contact)
747                         return false;
748
749         $conversation = null;
750
751         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
752                 intval($importer["uid"]),
753                 dbesc($guid)
754         );
755         if(count($c))
756                 $conversation = $c[0];
757         else {
758                 $r = q("insert into conv (uid,guid,creator,created,updated,subject,recips) values(%d, '%s', '%s', '%s', '%s', '%s', '%s') ",
759                         intval($importer["uid"]),
760                         dbesc($guid),
761                         dbesc($diaspora_handle),
762                         dbesc(datetime_convert('UTC','UTC',$created_at)),
763                         dbesc(datetime_convert()),
764                         dbesc($subject),
765                         dbesc($participant_handles)
766                 );
767                 if($r)
768                         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
769                 intval($importer["uid"]),
770             dbesc($guid)
771         );
772             if(count($c))
773             $conversation = $c[0];
774         }
775         if(! $conversation) {
776                 logger('diaspora_conversation: unable to create conversation.');
777                 return;
778         }
779
780         foreach($messages as $mesg) {
781
782                 $reply = 0;
783
784                 $msg_guid = notags(unxmlify($mesg->guid));
785                 $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
786                 $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
787                 $msg_author_signature = notags(unxmlify($mesg->author_signature));
788                 $msg_text = unxmlify($mesg->text);
789                 $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($mesg->created_at)));
790                 $msg_diaspora_handle = notags(unxmlify($mesg->diaspora_handle));
791                 $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
792                 if($msg_conversation_guid != $guid) {
793                         logger('diaspora_conversation: message conversation guid does not belong to the current conversation. ' . $xml);
794                         continue;
795                 }
796
797                 $body = diaspora2bb($msg_text);
798                 $message_id = $msg_diaspora_handle . ':' . $msg_guid;
799
800                 $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
801
802                 $author_signature = base64_decode($msg_author_signature);
803
804                 if(strcasecmp($msg_diaspora_handle,$msg["author"]) == 0) {
805                         $person = $contact;
806                         $key = $msg["key"];
807                 }
808                 else {
809                         $person = find_diaspora_person_by_handle($msg_diaspora_handle); 
810
811                         if(is_array($person) && x($person,'pubkey'))
812                                 $key = $person["pubkey"];
813                         else {
814                                 logger('diaspora_conversation: unable to find author details');
815                                 continue;
816                         }
817                 }
818
819                 if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
820                         logger('diaspora_conversation: verification failed.');
821                         continue;
822                 }
823
824                 if($msg_parent_author_signature) {
825                         $owner_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
826
827                         $parent_author_signature = base64_decode($msg_parent_author_signature);
828
829                         $key = $msg["key"];
830
831                         if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
832                                 logger('diaspora_conversation: owner verification failed.');
833                                 continue;
834                         }
835                 }
836
837                 $r = q("select id from mail where `uri` = '%s' limit 1",
838                         dbesc($message_id)
839                 );
840                 if(count($r)) {
841                         logger('diaspora_conversation: duplicate message already delivered.', LOGGER_DEBUG);
842                         continue;
843                 }
844
845                 q("insert into mail ( `uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) values ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
846                         intval($importer["uid"]),
847                         dbesc($msg_guid),
848                         intval($conversation["id"]),
849                         dbesc($person["name"]),
850                         dbesc($person["photo"]),
851                         dbesc($person["url"]),
852                         intval($contact["id"]),
853                         dbesc($subject),
854                         dbesc($body),
855                         0,
856                         0,
857                         dbesc($message_id),
858                         dbesc($parent_uri),
859                         dbesc($msg_created_at)
860                 );
861
862                 q("update conv set updated = '%s' where id = %d",
863                         dbesc(datetime_convert()),
864                         intval($conversation["id"])
865                 );
866
867                 notification(array(
868                         'type' => NOTIFY_MAIL,
869                         'notify_flags' => $importer["notify-flags"],
870                         'language' => $importer["language"],
871                         'to_name' => $importer["username"],
872                         'to_email' => $importer["email"],
873                         'uid' =>$importer["uid"],
874                         'item' => array('subject' => $subject, 'body' => $body),
875                         'source_name' => $person["name"],
876                         'source_link' => $person["url"],
877                         'source_photo' => $person["thumb"],
878                         'verb' => ACTIVITY_POST,
879                         'otype' => 'mail'
880                 ));
881         }
882 */
883                 return true;
884         }
885
886         private function construct_like_body($contact, $parent_item, $guid) {
887                 $bodyverb = t('%1$s likes %2$s\'s %3$s');
888
889                 $ulink = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
890                 $alink = "[url=".$parent_item["author-link"]."]".$parent_item["author-name"]."[/url]";
891                 $plink = "[url=".App::get_baseurl()."/display/".urlencode($guid)."]".t("status")."[/url]";
892
893                 return sprintf($bodyverb, $ulink, $alink, $plink);
894         }
895
896         private function construct_like_object($importer, $parent_item) {
897                 $objtype = ACTIVITY_OBJ_NOTE;
898                 $link = xmlify('<link rel="alternate" type="text/html" href="'.App::get_baseurl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />'."\n") ;
899                 $parent_body = $parent_item["body"];
900
901                 $obj = <<< EOT
902
903                 <object>
904                         <type>$objtype</type>
905                         <local>1</local>
906                         <id>{$parent_item["uri"]}</id>
907                         <link>$link</link>
908                         <title></title>
909                         <content>$parent_body</content>
910                 </object>
911 EOT;
912
913                 return $obj;
914         }
915
916         private function import_like($importer, $sender, $data) {
917                 $positive = notags(unxmlify($data->positive));
918                 $guid = notags(unxmlify($data->guid));
919                 $parent_type = notags(unxmlify($data->parent_type));
920                 $parent_guid = notags(unxmlify($data->parent_guid));
921                 $author = notags(unxmlify($data->author));
922
923                 // likes on comments aren't supported by Diaspora - only on posts
924                 // But maybe this will be supported in the future, so we will accept it.
925                 if (!in_array($parent_type, array("Post", "Comment")))
926                         return false;
927
928                 $contact = self::get_allowed_contact_by_handle($importer, $sender, true);
929                 if (!$contact)
930                         return false;
931
932                 if (self::message_exists($importer["uid"], $guid))
933                         return false;
934
935                 $parent_item = self::fetch_parent_item($importer["uid"], $parent_guid, $author, $contact);
936                 if (!$parent_item)
937                         return false;
938
939                 $person = self::get_person_by_handle($author);
940                 if (!is_array($person)) {
941                         logger("unable to find author details");
942                         return false;
943                 }
944
945                 // Fetch the contact id - if we know this contact
946                 $author_contact = self::get_author_contact_by_url($contact, $person, $importer["uid"]);
947
948                 // "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora
949                 // We would accept this anyhow.
950                 if ($positive === "true")
951                         $verb = ACTIVITY_LIKE;
952                 else
953                         $verb = ACTIVITY_DISLIKE;
954
955                 $datarray = array();
956
957                 $datarray["uid"] = $importer["uid"];
958                 $datarray["contact-id"] = $author_contact["cid"];
959                 $datarray["network"]  = $author_contact["network"];
960
961                 $datarray["author-name"] = $person["name"];
962                 $datarray["author-link"] = $person["url"];
963                 $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
964
965                 $datarray["owner-name"] = $contact["name"];
966                 $datarray["owner-link"] = $contact["url"];
967                 $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
968
969                 $datarray["guid"] = $guid;
970                 $datarray["uri"] = $author.":".$guid;
971
972                 $datarray["type"] = "activity";
973                 $datarray["verb"] = $verb;
974                 $datarray["gravity"] = GRAVITY_LIKE;
975                 $datarray["parent-uri"] = $parent_item["uri"];
976
977                 $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
978                 $datarray["object"] = self::construct_like_object($importer, $parent_item);
979
980                 $datarray["body"] = self::construct_like_body($contact, $parent_item, $guid);
981
982                 $message_id = item_store($datarray);
983                 // print_r($datarray);
984
985                 // If we are the origin of the parent we store the original data and notify our followers
986                 if($message_id AND $parent_item["origin"]) {
987
988                         // Formerly we stored the signed text, the signature and the author in different fields.
989                         // We now store the raw data so that we are more flexible.
990                         q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
991                                 intval($message_id),
992                                 dbesc(json_encode($data))
993                         );
994
995                         // notify others
996                         proc_run("php", "include/notifier.php", "comment-import", $message_id);
997                 }
998
999                 return $message_id;
1000         }
1001
1002         private function import_message($importer, $data) {
1003                 $guid = notags(unxmlify($data->guid));
1004                 $parent_guid = notags(unxmlify($data->parent_guid));
1005                 $text = unxmlify($data->text);
1006                 $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
1007                 $author = notags(unxmlify($data->author));
1008                 $conversation_guid = notags(unxmlify($data->conversation_guid));
1009
1010                 $parent_uri = $author.":".$parent_guid;
1011
1012                 $contact = self::get_allowed_contact_by_handle($importer, $author, true);
1013                 if (!$contact)
1014                         return false;
1015
1016                 $conversation = null;
1017
1018                 $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1019                         intval($importer["uid"]),
1020                         dbesc($conversation_guid)
1021                 );
1022                 if(count($c))
1023                         $conversation = $c[0];
1024                 else {
1025                         logger("conversation not available.");
1026                         return false;
1027                 }
1028
1029                 $reply = 0;
1030
1031                 $body = diaspora2bb($text);
1032                 $message_id = $author.":".$guid;
1033
1034                 $person = self::get_person_by_handle($author);
1035                 if (!$person) {
1036                         logger("unable to find author details");
1037                         return false;
1038                 }
1039
1040                 $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1041                         dbesc($message_id),
1042                         intval($importer["uid"])
1043                 );
1044                 if(count($r)) {
1045                         logger("duplicate message already delivered.", LOGGER_DEBUG);
1046                         return false;
1047                 }
1048
1049                 q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
1050                                 VALUES ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
1051                         intval($importer["uid"]),
1052                         dbesc($guid),
1053                         intval($conversation["id"]),
1054                         dbesc($person["name"]),
1055                         dbesc($person["photo"]),
1056                         dbesc($person["url"]),
1057                         intval($contact["id"]),
1058                         dbesc($conversation["subject"]),
1059                         dbesc($body),
1060                         0,
1061                         1,
1062                         dbesc($message_id),
1063                         dbesc($parent_uri),
1064                         dbesc($created_at)
1065                 );
1066
1067                 q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d",
1068                         dbesc(datetime_convert()),
1069                         intval($conversation["id"])
1070                 );
1071
1072                 return true;
1073         }
1074
1075         private function import_participation($importer, $data) {
1076                 // I'm not sure if we can fully support this message type
1077                 return true;
1078         }
1079
1080         private function import_photo($importer, $data) {
1081                 // There doesn't seem to be a reason for this function, since the photo data is transmitted in the status message as well
1082                 return true;
1083         }
1084
1085         private function import_poll_participation($importer, $data) {
1086                 // We don't support polls by now
1087                 return true;
1088         }
1089
1090         private function import_profile($importer, $data) {
1091                 $author = notags(unxmlify($data->author));
1092
1093                 $contact = self::get_contact_by_handle($importer["uid"], $author);
1094                 if (!$contact)
1095                         return;
1096
1097                 $name = unxmlify($data->first_name).((strlen($data->last_name)) ? " ".unxmlify($data->last_name) : "");
1098                 $image_url = unxmlify($data->image_url);
1099                 $birthday = unxmlify($data->birthday);
1100                 $location = diaspora2bb(unxmlify($data->location));
1101                 $about = diaspora2bb(unxmlify($data->bio));
1102                 $gender = unxmlify($data->gender);
1103                 $searchable = (unxmlify($data->searchable) == "true");
1104                 $nsfw = (unxmlify($data->nsfw) == "true");
1105                 $tags = unxmlify($data->tag_string);
1106
1107                 $tags = explode("#", $tags);
1108
1109                 $keywords = array();
1110                 foreach ($tags as $tag) {
1111                         $tag = trim(strtolower($tag));
1112                         if ($tag != "")
1113                                 $keywords[] = $tag;
1114                 }
1115
1116                 $keywords = implode(", ", $keywords);
1117
1118                 $handle_parts = explode("@", $author);
1119                 $nick = $handle_parts[0];
1120
1121                 if($name === "")
1122                         $name = $handle_parts[0];
1123
1124                 if( preg_match("|^https?://|", $image_url) === 0)
1125                         $image_url = "http://".$handle_parts[1].$image_url;
1126
1127                 update_contact_avatar($image_url, $importer["uid"], $contact["id"]);
1128
1129                 // Generic birthday. We don't know the timezone. The year is irrelevant.
1130
1131                 $birthday = str_replace("1000", "1901", $birthday);
1132
1133                 if ($birthday != "")
1134                         $birthday = datetime_convert("UTC", "UTC", $birthday, "Y-m-d");
1135
1136                 // this is to prevent multiple birthday notifications in a single year
1137                 // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
1138
1139                 if(substr($birthday,5) === substr($contact["bd"],5))
1140                         $birthday = $contact["bd"];
1141
1142                 $r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `bd` = '%s',
1143                                 `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
1144                         dbesc($name),
1145                         dbesc($nick),
1146                         dbesc($author),
1147                         dbesc(datetime_convert()),
1148                         dbesc($birthday),
1149                         dbesc($location),
1150                         dbesc($about),
1151                         dbesc($keywords),
1152                         dbesc($gender),
1153                         intval($contact["id"]),
1154                         intval($importer["uid"])
1155                 );
1156
1157                 if ($searchable) {
1158                         poco_check($contact["url"], $name, NETWORK_DIASPORA, $image_url, $about, $location, $gender, $keywords, "",
1159                                 datetime_convert(), 2, $contact["id"], $importer["uid"]);
1160                 }
1161
1162                 $gcontact = array("url" => $contact["url"], "network" => NETWORK_DIASPORA, "generation" => 2,
1163                                         "photo" => $image_url, "name" => $name, "location" => $location,
1164                                         "about" => $about, "birthday" => $birthday, "gender" => $gender,
1165                                         "addr" => $author, "nick" => $nick, "keywords" => $keywords,
1166                                         "hide" => !$searchable, "nsfw" => $nsfw);
1167
1168                 update_gcontact($gcontact);
1169
1170                 return true;
1171         }
1172
1173         private function import_request($importer, $data) {
1174                 // @todo
1175                 print_r($data);
1176 /*
1177         $author = unxmlify($xml->author);
1178         $recipient = unxmlify($xml->recipient);
1179
1180         if (!$author || !$recipient)
1181                 return;
1182
1183         $contact = self::get_contact_by_handle($importer["uid"],$author);
1184
1185         if($contact) {
1186
1187                 // perhaps we were already sharing with this person. Now they're sharing with us.
1188                 // That makes us friends.
1189
1190                 if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
1191                         q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
1192                                 intval(CONTACT_IS_FRIEND),
1193                                 intval($contact["id"]),
1194                                 intval($importer["uid"])
1195                         );
1196                 }
1197                 // send notification
1198
1199                 $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
1200                         intval($importer["uid"])
1201                 );
1202
1203                 if((count($r)) && (!$r[0]["hide-friends"]) && (!$contact["hidden"]) && intval(get_pconfig($importer["uid"],'system','post_newfriend'))) {
1204
1205                         $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
1206                                 intval($importer["uid"])
1207                         );
1208
1209                         // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
1210
1211                         if(count($self) && $contact["rel"] == CONTACT_IS_FOLLOWER) {
1212
1213                                 $arr = array();
1214                                 $arr["uri"] = $arr["parent-uri"] = item_new_uri(App::get_hostname(), $importer["uid"]);
1215                                 $arr["uid"] = $importer["uid"];
1216                                 $arr["contact-id"] = $self[0]["id"];
1217                                 $arr["wall"] = 1;
1218                                 $arr["type"] = 'wall';
1219                                 $arr["gravity"] = 0;
1220                                 $arr["origin"] = 1;
1221                                 $arr["author-name"] = $arr["owner-name"] = $self[0]["name"];
1222                                 $arr["author-link"] = $arr["owner-link"] = $self[0]["url"];
1223                                 $arr["author-avatar"] = $arr["owner-avatar"] = $self[0]["thumb"];
1224                                 $arr["verb"] = ACTIVITY_FRIEND;
1225                                 $arr["object-type"] = ACTIVITY_OBJ_PERSON;
1226
1227                                 $A = '[url=' . $self[0]["url"] . "]' . $self[0]["name"] . '[/url]';
1228                                 $B = '[url=' . $contact["url"] . "]' . $contact["name"] . '[/url]';
1229                                 $BPhoto = '[url=' . $contact["url"] . "]' . '[img]' . $contact["thumb"] . '[/img][/url]';
1230                                 $arr["body"] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
1231
1232                                 $arr["object"] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact["name"] . '</title>'
1233                                         . '<id>' . $contact["url"] . '/' . $contact["name"] . '</id>';
1234                                 $arr["object"] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact["url"] . '" />' . "\n")
1235 ;
1236                                 $arr["object"] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact["thumb"] . '" />' . "\n");
1237                                 $arr["object"] .= '</link></object>' . "\n";
1238                                 $arr["last-child"] = 1;
1239
1240                                 $arr["allow_cid"] = $user[0]["allow_cid"];
1241                                 $arr["allow_gid"] = $user[0]["allow_gid"];
1242                                 $arr["deny_cid"]  = $user[0]["deny_cid"];
1243                                 $arr["deny_gid"]  = $user[0]["deny_gid"];
1244
1245                                 $i = item_store($arr);
1246                                 if($i)
1247                                 proc_run('php',"include/notifier.php","activity","$i");
1248
1249                         }
1250
1251                 }
1252
1253                 return;
1254         }
1255
1256         $ret = self::get_person_by_handle($author);
1257
1258
1259         if((! count($ret)) || ($ret["network"] != NETWORK_DIASPORA)) {
1260                 logger('diaspora_request: Cannot resolve diaspora handle ' . $author . ' for ' . $recipient);
1261                 return;
1262         }
1263
1264         $batch = (($ret["batch"]) ? $ret["batch"] : implode('/', array_slice(explode('/',$ret["url"]),0,3)) . '/receive/public');
1265
1266
1267
1268         $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
1269                 VALUES ( %d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d) ",
1270                 intval($importer["uid"]),
1271                 dbesc($ret["network"]),
1272                 dbesc($ret["addr"]),
1273                 datetime_convert(),
1274                 dbesc($ret["url"]),
1275                 dbesc(normalise_link($ret["url"])),
1276                 dbesc($batch),
1277                 dbesc($ret["name"]),
1278                 dbesc($ret["nick"]),
1279                 dbesc($ret["photo"]),
1280                 dbesc($ret["pubkey"]),
1281                 dbesc($ret["notify"]),
1282                 dbesc($ret["poll"]),
1283                 1,
1284                 2
1285         );
1286
1287         // find the contact record we just created
1288
1289         $contact_record = diaspora_get_contact_by_handle($importer["uid"],$author);
1290
1291         if(! $contact_record) {
1292                 logger('diaspora_request: unable to locate newly created contact record.');
1293                 return;
1294         }
1295
1296         $g = q("select def_gid from user where uid = %d limit 1",
1297                 intval($importer["uid"])
1298         );
1299         if($g && intval($g[0]["def_gid"])) {
1300                 group_add_member($importer["uid"],'',$contact_record["id"],$g[0]["def_gid"]);
1301         }
1302
1303         if($importer["page-flags"] == PAGE_NORMAL) {
1304
1305                 $hash = random_string() . (string) time();   // Generate a confirm_key
1306
1307                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime` )
1308                         VALUES ( %d, %d, %d, %d, '%s', '%s', '%s' )",
1309                         intval($importer["uid"]),
1310                         intval($contact_record["id"]),
1311                         0,
1312                         0,
1313                         dbesc( t('Sharing notification from Diaspora network')),
1314                         dbesc($hash),
1315                         dbesc(datetime_convert())
1316                 );
1317         }
1318         else {
1319
1320                 // automatic friend approval
1321
1322                 update_contact_avatar($contact_record["photo"],$importer["uid"],$contact_record["id"]);
1323
1324                 // technically they are sharing with us (CONTACT_IS_SHARING),
1325                 // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
1326                 // we are going to change the relationship and make them a follower.
1327
1328                 if($importer["page-flags"] == PAGE_FREELOVE)
1329                         $new_relation = CONTACT_IS_FRIEND;
1330                 else
1331                         $new_relation = CONTACT_IS_FOLLOWER;
1332
1333                 $r = q("UPDATE `contact` SET `rel` = %d,
1334                         `name-date` = '%s',
1335                         `uri-date` = '%s',
1336                         `blocked` = 0,
1337                         `pending` = 0,
1338                         `writable` = 1
1339                         WHERE `id` = %d
1340                         ",
1341                         intval($new_relation),
1342                         dbesc(datetime_convert()),
1343                         dbesc(datetime_convert()),
1344                         intval($contact_record["id"])
1345                 );
1346
1347                 $u = q("select * from user where uid = %d limit 1",intval($importer["uid"]));
1348                 if($u)
1349                         $ret = diaspora_share($u[0],$contact_record);
1350         }
1351 */
1352                 return true;
1353         }
1354
1355         private function get_original_item($guid, $orig_author, $author) {
1356
1357                 // Do we already have this item?
1358                 $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
1359                                 `author-name`, `author-link`, `author-avatar`
1360                                 FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
1361                         dbesc($guid));
1362
1363                 if(count($r)) {
1364                         logger("reshared message ".$guid." already exists on system.");
1365
1366                         // Maybe it is already a reshared item?
1367                         // Then refetch the content, since there can be many side effects with reshared posts from other networks or reshares from reshares
1368                         if (api_share_as_retweet($r[0]))
1369                                 $r = array();
1370                         else
1371                                 return $r[0];
1372                 }
1373
1374                 if (!count($r)) {
1375                         $server = 'https://'.substr($orig_author,strpos($orig_author,'@')+1);
1376                         logger("1st try: reshared message ".$guid." will be fetched from original server: ".$server);
1377                         $item_id = self::store_by_guid($guid, $server);
1378
1379                         if (!$item_id) {
1380                                 $server = 'https://'.substr($author,strpos($author,'@')+1);
1381                                 logger("2nd try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
1382                                 $item = self::store_by_guid($guid, $server);
1383                         }
1384                         if (!$item_id) {
1385                                 $server = 'http://'.substr($orig_author,strpos($orig_author,'@')+1);
1386                                 logger("3rd try: reshared message ".$guid." will be fetched from original server: ".$server);
1387                                 $item = self::store_by_guid($guid, $server);
1388                         }
1389                         if (!$item_id) {
1390                                 $server = 'http://'.substr($author,strpos($author,'@')+1);
1391                                 logger("4th try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
1392                                 $item = self::store_by_guid($guid, $server);
1393                         }
1394
1395                         if ($item_id) {
1396                                 $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
1397                                                 `author-name`, `author-link`, `author-avatar`
1398                                         FROM `item` WHERE `id` = %d AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
1399                                         intval($item_id));
1400
1401                                 if ($r)
1402                                         return $r[0];
1403
1404                         }
1405                 }
1406                 return false;
1407         }
1408
1409         private function import_reshare($importer, $data) {
1410                 $root_author = notags(unxmlify($data->root_author));
1411                 $root_guid = notags(unxmlify($data->root_guid));
1412                 $guid = notags(unxmlify($data->guid));
1413                 $author = notags(unxmlify($data->author));
1414                 $public = notags(unxmlify($data->public));
1415                 $created_at = notags(unxmlify($data->created_at));
1416
1417                 $contact = self::get_allowed_contact_by_handle($importer, $author, false);
1418                 if (!$contact)
1419                         return false;
1420
1421                 if (self::message_exists($importer["uid"], $guid))
1422                         return false;
1423
1424                 $original_item = self::get_original_item($root_guid, $root_author, $author);
1425                 if (!$original_item)
1426                         return false;
1427
1428                 $datarray = array();
1429
1430                 $datarray["uid"] = $importer["uid"];
1431                 $datarray["contact-id"] = $contact["id"];
1432                 $datarray["network"]  = NETWORK_DIASPORA;
1433
1434                 $datarray["author-name"] = $contact["name"];
1435                 $datarray["author-link"] = $contact["url"];
1436                 $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
1437
1438                 $datarray["owner-name"] = $datarray["author-name"];
1439                 $datarray["owner-link"] = $datarray["author-link"];
1440                 $datarray["owner-avatar"] = $datarray["author-avatar"];
1441
1442                 $datarray["guid"] = $guid;
1443                 $datarray["uri"] = $datarray["parent-uri"] = $author.":".$guid;
1444
1445                 $datarray["verb"] = ACTIVITY_POST;
1446                 $datarray["gravity"] = GRAVITY_PARENT;
1447
1448                 $datarray["object"] = json_encode($data);
1449
1450                 $prefix = share_header($original_item["author-name"], $original_item["author-link"], $original_item["author-avatar"],
1451                                         $original_item["guid"], $original_item["created"], $original_item["uri"]);
1452                 $datarray["body"] = $prefix.$original_item["body"]."[/share]";
1453
1454                 $datarray["tag"] = $original_item["tag"];
1455                 $datarray["app"]  = $original_item["app"];
1456
1457                 $datarray["plink"] = self::plink($author, $guid);
1458                 $datarray["private"] = (($public == "false") ? 1 : 0);
1459                 $datarray["changed"] = $datarray["created"] = $datarray["edited"] = datetime_convert("UTC", "UTC", $created_at);
1460
1461                 $datarray["object-type"] = $original_item["object-type"];
1462
1463                 self::fetch_guid($datarray);
1464                 $message_id = item_store($datarray);
1465                 // print_r($datarray);
1466
1467                 return $message_id;
1468         }
1469
1470         private function item_retraction($importer, $contact, $data) {
1471                 $target_type = notags(unxmlify($data->target_type));
1472                 $target_guid = notags(unxmlify($data->target_guid));
1473                 $author = notags(unxmlify($data->author));
1474
1475                 $person = self::get_person_by_handle($author);
1476                 if (!is_array($person)) {
1477                         logger("unable to find author detail for ".$author);
1478                         return false;
1479                 }
1480
1481                 $r = q("SELECT `id`, `parent`, `parent-uri`, `author-link` FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1",
1482                         dbesc($target_guid),
1483                         intval($importer["uid"])
1484                 );
1485                 if (!$r)
1486                         return false;
1487
1488                 // Only delete it if the author really fits
1489                 if (!link_compare($r[0]["author-link"],$person["url"]))
1490                         return false;
1491
1492                 // Check if the sender is the thread owner
1493                 $p = q("SELECT `author-link`, `origin` FROM `item` WHERE `id` = %d",
1494                         intval($r[0]["parent"]));
1495
1496                 // Only delete it if the parent author really fits
1497                 if (!link_compare($p[0]["author-link"], $contact["url"]))
1498                         return false;
1499
1500                 // Currently we don't have a central deletion function that we could use in this case. The function "item_drop" doesn't work for that case
1501                 q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' WHERE `id` = %d",
1502                         dbesc(datetime_convert()),
1503                         dbesc(datetime_convert()),
1504                         intval($r[0]["id"])
1505                 );
1506                 delete_thread($r[0]["id"], $r[0]["parent-uri"]);
1507
1508                 // Now check if the retraction needs to be relayed by us
1509                 if($p[0]["origin"]) {
1510
1511                         // Formerly we stored the signed text, the signature and the author in different fields.
1512                         // We now store the raw data so that we are more flexible.
1513                         q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
1514                                 intval($r[0]["id"]),
1515                                 dbesc(json_encode($data))
1516                         );
1517
1518                         // notify others
1519                         proc_run("php", "include/notifier.php", "drop", $r[0]["id"]);
1520                 }
1521         }
1522
1523         private function import_retraction($importer, $sender, $data) {
1524                 $target_type = notags(unxmlify($data->target_type));
1525
1526                 $contact = self::get_contact_by_handle($importer["uid"], $sender);
1527                 if (!$contact) {
1528                         logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
1529                         return false;
1530                 }
1531
1532                 switch ($target_type) {
1533                         case "Comment":
1534                         case "Like":
1535                         case "Post": // "Post" will be supported in a future version
1536                         case "Reshare":
1537                         case "StatusMessage":
1538                                 return self::item_retraction($importer, $contact, $data);;
1539
1540                         case "Person":
1541                                 contact_remove($contact["id"]);
1542                                 return true;
1543
1544                         default:
1545                                 logger("Unknown target type ".$target_type);
1546                                 return false;
1547                 }
1548                 return true;
1549         }
1550
1551         private function import_status_message($importer, $data) {
1552
1553                 $raw_message = unxmlify($data->raw_message);
1554                 $guid = notags(unxmlify($data->guid));
1555                 $author = notags(unxmlify($data->author));
1556                 $public = notags(unxmlify($data->public));
1557                 $created_at = notags(unxmlify($data->created_at));
1558                 $provider_display_name = notags(unxmlify($data->provider_display_name));
1559
1560                 /// @todo enable support for polls
1561                 //if ($data->poll) {
1562                 //      foreach ($data->poll AS $poll)
1563                 //              print_r($poll);
1564                 //      die("poll!\n");
1565                 //}
1566                 $contact = self::get_allowed_contact_by_handle($importer, $author, false);
1567                 if (!$contact)
1568                         return false;
1569
1570                 if (self::message_exists($importer["uid"], $guid))
1571                         return false;
1572
1573                 $address = array();
1574                 if ($data->location)
1575                         foreach ($data->location->children() AS $fieldname => $data)
1576                                 $address[$fieldname] = notags(unxmlify($data));
1577
1578                 $body = diaspora2bb($raw_message);
1579
1580                 $datarray = array();
1581
1582                 if ($data->photo) {
1583                         foreach ($data->photo AS $photo)
1584                                 $body = "[img]".$photo->remote_photo_path.$photo->remote_photo_name."[/img]\n".$body;
1585
1586                         $datarray["object-type"] = ACTIVITY_OBJ_PHOTO;
1587                 } else {
1588                         $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
1589
1590                         // Add OEmbed and other information to the body
1591                         if (!self::is_redmatrix($contact["url"]))
1592                                 $body = add_page_info_to_body($body, false, true);
1593                 }
1594
1595                 $datarray["uid"] = $importer["uid"];
1596                 $datarray["contact-id"] = $contact["id"];
1597                 $datarray["network"] = NETWORK_DIASPORA;
1598
1599                 $datarray["author-name"] = $contact["name"];
1600                 $datarray["author-link"] = $contact["url"];
1601                 $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
1602
1603                 $datarray["owner-name"] = $datarray["author-name"];
1604                 $datarray["owner-link"] = $datarray["author-link"];
1605                 $datarray["owner-avatar"] = $datarray["author-avatar"];
1606
1607                 $datarray["guid"] = $guid;
1608                 $datarray["uri"] = $datarray["parent-uri"] = $author.":".$guid;
1609
1610                 $datarray["verb"] = ACTIVITY_POST;
1611                 $datarray["gravity"] = GRAVITY_PARENT;
1612
1613                 $datarray["object"] = json_encode($data);
1614
1615                 $datarray["body"] = $body;
1616
1617                 if ($provider_display_name != "")
1618                         $datarray["app"] = $provider_display_name;
1619
1620                 $datarray["plink"] = self::plink($author, $guid);
1621                 $datarray["private"] = (($public == "false") ? 1 : 0);
1622                 $datarray["changed"] = $datarray["created"] = $datarray["edited"] = datetime_convert("UTC", "UTC", $created_at);
1623
1624                 if (isset($address["address"]))
1625                         $datarray["location"] = $address["address"];
1626
1627                 if (isset($address["lat"]) AND isset($address["lng"]))
1628                         $datarray["coord"] = $address["lat"]." ".$address["lng"];
1629
1630                 self::fetch_guid($datarray);
1631                 $message_id = item_store($datarray);
1632                 // print_r($datarray);
1633
1634                 logger("Stored item with message id ".$message_id, LOGGER_DEBUG);
1635
1636                 return $message_id;
1637         }
1638 }
1639 ?>