src/Protocol/PortableContact.php

   1 <?php
   2 /**
   3  * @file src/Protocol/PortableContact.php
   4  *
   5  * @todo Move GNU Social URL schemata (http://server.tld/user/number) to http://server.tld/username
   6  * @todo Fetch profile data from profile page for Redmatrix users
   7  * @todo Detect if it is a forum
   8  */
   9
  10 namespace Friendica\Protocol;
  11
  12 use DOMDocument;
  13 use DOMXPath;
  14 use Exception;
  15 use Friendica\Content\Text\HTML;
  16 use Friendica\Core\Config;
  17 use Friendica\Core\Logger;
  18 use Friendica\Core\Protocol;
  19 use Friendica\Core\Worker;
  20 use Friendica\Database\DBA;
  21 use Friendica\Model\Contact;
  22 use Friendica\Model\GContact;
  23 use Friendica\Model\GServer;
  24 use Friendica\Model\Profile;
  25 use Friendica\Module\Register;
  26 use Friendica\Network\Probe;
  27 use Friendica\Util\DateTimeFormat;
  28 use Friendica\Util\Network;
  29 use Friendica\Util\Strings;
  30 use Friendica\Util\XML;
  31
  32 class PortableContact
  33 {
  34         const DISABLED = 0;
  35         const USERS = 1;
  36         const USERS_GCONTACTS = 2;
  37         const USERS_GCONTACTS_FALLBACK = 3;
  38
  39         /**
  40          * @brief Fetch POCO data
  41          *
  42          * @param integer $cid  Contact ID
  43          * @param integer $uid  User ID
  44          * @param integer $zcid Global Contact ID
  45          * @param integer $url  POCO address that should be polled
  46          *
  47          * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  48          * and add the entries to the gcontact (Global Contact) table, or update existing entries
  49          * if anything (name or photo) has changed.
  50          * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  51          *
  52          * Once the global contact is stored add (if necessary) the contact linkage which associates
  53          * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  54          * pointing to the same global contact id.
  55          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  56          */
  57         public static function loadWorker($cid, $uid = 0, $zcid = 0, $url = null)
  58         {
  59                 // Call the function "load" via the worker
  60                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "load", (int)$cid, (int)$uid, (int)$zcid, $url);
  61         }
  62
  63         /**
  64          * @brief Fetch POCO data from the worker
  65          *
  66          * @param integer $cid  Contact ID
  67          * @param integer $uid  User ID
  68          * @param integer $zcid Global Contact ID
  69          * @param integer $url  POCO address that should be polled
  70          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  71          */
  72         public static function load($cid, $uid, $zcid, $url)
  73         {
  74                 if ($cid) {
  75                         if (!$url || !$uid) {
  76                                 $contact = DBA::selectFirst('contact', ['poco', 'uid'], ['id' => $cid]);
  77                                 if (DBA::isResult($contact)) {
  78                                         $url = $contact['poco'];
  79                                         $uid = $contact['uid'];
  80                                 }
  81                         }
  82                         if (!$uid) {
  83                                 return;
  84                         }
  85                 }
  86
  87                 if (!$url) {
  88                         return;
  89                 }
  90
  91                 $url = $url . (($uid) ? '/@me/@all?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation' : '?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation');
  92
  93                 Logger::log('load: ' . $url, Logger::DEBUG);
  94
  95                 $fetchresult = Network::fetchUrlFull($url);
  96                 $s = $fetchresult->getBody();
  97
  98                 Logger::log('load: returns ' . $s, Logger::DATA);
  99
 100                 Logger::log('load: return code: ' . $fetchresult->getReturnCode(), Logger::DEBUG);
 101
 102                 if (($fetchresult->getReturnCode() > 299) || (! $s)) {
 103                         return;
 104                 }
 105
 106                 $j = json_decode($s, true);
 107
 108                 Logger::log('load: json: ' . print_r($j, true), Logger::DATA);
 109
 110                 if (!isset($j['entry'])) {
 111                         return;
 112                 }
 113
 114                 $total = 0;
 115                 foreach ($j['entry'] as $entry) {
 116                         $total ++;
 117                         $profile_url = '';
 118                         $profile_photo = '';
 119                         $connect_url = '';
 120                         $name = '';
 121                         $network = '';
 122                         $updated = DBA::NULL_DATETIME;
 123                         $location = '';
 124                         $about = '';
 125                         $keywords = '';
 126                         $gender = '';
 127                         $contact_type = -1;
 128                         $generation = 0;
 129
 130                         if (!empty($entry['displayName'])) {
 131                                 $name = $entry['displayName'];
 132                         }
 133
 134                         if (isset($entry['urls'])) {
 135                                 foreach ($entry['urls'] as $url) {
 136                                         if ($url['type'] == 'profile') {
 137                                                 $profile_url = $url['value'];
 138                                                 continue;
 139                                         }
 140                                         if ($url['type'] == 'webfinger') {
 141                                                 $connect_url = str_replace('acct:', '', $url['value']);
 142                                                 continue;
 143                                         }
 144                                 }
 145                         }
 146                         if (isset($entry['photos'])) {
 147                                 foreach ($entry['photos'] as $photo) {
 148                                         if ($photo['type'] == 'profile') {
 149                                                 $profile_photo = $photo['value'];
 150                                                 continue;
 151                                         }
 152                                 }
 153                         }
 154
 155                         if (isset($entry['updated'])) {
 156                                 $updated = date(DateTimeFormat::MYSQL, strtotime($entry['updated']));
 157                         }
 158
 159                         if (isset($entry['network'])) {
 160                                 $network = $entry['network'];
 161                         }
 162
 163                         if (isset($entry['currentLocation'])) {
 164                                 $location = $entry['currentLocation'];
 165                         }
 166
 167                         if (isset($entry['aboutMe'])) {
 168                                 $about = HTML::toBBCode($entry['aboutMe']);
 169                         }
 170
 171                         if (isset($entry['gender'])) {
 172                                 $gender = $entry['gender'];
 173                         }
 174
 175                         if (isset($entry['generation']) && ($entry['generation'] > 0)) {
 176                                 $generation = ++$entry['generation'];
 177                         }
 178
 179                         if (isset($entry['tags'])) {
 180                                 foreach ($entry['tags'] as $tag) {
 181                                         $keywords = implode(", ", $tag);
 182                                 }
 183                         }
 184
 185                         if (isset($entry['contactType']) && ($entry['contactType'] >= 0)) {
 186                                 $contact_type = $entry['contactType'];
 187                         }
 188
 189                         $gcontact = ["url" => $profile_url,
 190                                         "name" => $name,
 191                                         "network" => $network,
 192                                         "photo" => $profile_photo,
 193                                         "about" => $about,
 194                                         "location" => $location,
 195                                         "gender" => $gender,
 196                                         "keywords" => $keywords,
 197                                         "connect" => $connect_url,
 198                                         "updated" => $updated,
 199                                         "contact-type" => $contact_type,
 200                                         "generation" => $generation];
 201
 202                         try {
 203                                 $gcontact = GContact::sanitize($gcontact);
 204                                 $gcid = GContact::update($gcontact);
 205
 206                                 GContact::link($gcid, $uid, $cid, $zcid);
 207                         } catch (Exception $e) {
 208                                 Logger::log($e->getMessage(), Logger::DEBUG);
 209                         }
 210                 }
 211                 Logger::log("load: loaded $total entries", Logger::DEBUG);
 212
 213                 $condition = ["`cid` = ? AND `uid` = ? AND `zcid` = ? AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY", $cid, $uid, $zcid];
 214                 DBA::delete('glink', $condition);
 215         }
 216
 217         public static function reachable($profile, $server = "", $network = "", $force = false)
 218         {
 219                 if ($server == "") {
 220                         $server = Contact::getBasepath($profile);
 221                 }
 222
 223                 if ($server == "") {
 224                         return true;
 225                 }
 226
 227                 return GServer::check($server, $force);
 228         }
 229
 230         public static function alternateOStatusUrl($url)
 231         {
 232                 return(preg_match("=https?://.+/user/\d+=ism", $url, $matches));
 233         }
 234
 235         public static function lastUpdated($profile, $force = false)
 236         {
 237                 $gcontacts = q(
 238                         "SELECT * FROM `gcontact` WHERE `nurl` = '%s'",
 239                         DBA::escape(Strings::normaliseLink($profile))
 240                 );
 241
 242                 if (!DBA::isResult($gcontacts)) {
 243                         return false;
 244                 }
 245
 246                 $contact = ["url" => $profile];
 247
 248                 if ($gcontacts[0]["created"] <= DBA::NULL_DATETIME) {
 249                         $contact['created'] = DateTimeFormat::utcNow();
 250                 }
 251
 252                 $server_url = '';
 253                 if ($force) {
 254                         $server_url = Strings::normaliseLink(Contact::getBasepath($profile));
 255                 }
 256
 257                 if (($server_url == '') && ($gcontacts[0]["server_url"] != "")) {
 258                         $server_url = $gcontacts[0]["server_url"];
 259                 }
 260
 261                 if (!$force && (($server_url == '') || ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
 262                         $server_url = Strings::normaliseLink(Contact::getBasepath($profile));
 263                 }
 264
 265                 if (!in_array($gcontacts[0]["network"], [Protocol::DFRN, Protocol::DIASPORA, Protocol::FEED, Protocol::OSTATUS, ""])) {
 266                         Logger::log("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", Logger::DEBUG);
 267                         return false;
 268                 }
 269
 270                 if ($server_url != "") {
 271                         if (!GServer::check($server_url, $force)) {
 272                                 if ($force) {
 273                                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 274                                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($profile)]);
 275                                 }
 276
 277                                 Logger::log("Profile ".$profile.": Server ".$server_url." wasn't reachable.", Logger::DEBUG);
 278                                 return false;
 279                         }
 280                         $contact['server_url'] = $server_url;
 281                 }
 282
 283                 if (in_array($gcontacts[0]["network"], ["", Protocol::FEED])) {
 284                         $server = q(
 285                                 "SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 286                                 DBA::escape(Strings::normaliseLink($server_url))
 287                         );
 288
 289                         if ($server) {
 290                                 $contact['network'] = $server[0]["network"];
 291                         } else {
 292                                 return false;
 293                         }
 294                 }
 295
 296                 // noscrape is really fast so we don't cache the call.
 297                 if (($server_url != "") && ($gcontacts[0]["nick"] != "")) {
 298                         //  Use noscrape if possible
 299                         $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", DBA::escape(Strings::normaliseLink($server_url)));
 300
 301                         if ($server) {
 302                                 $curlResult = Network::curl($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 303
 304                                 if ($curlResult->isSuccess() && ($curlResult->getBody() != "")) {
 305                                         $noscrape = json_decode($curlResult->getBody(), true);
 306
 307                                         if (is_array($noscrape)) {
 308                                                 $contact["network"] = $server[0]["network"];
 309
 310                                                 if (isset($noscrape["fn"])) {
 311                                                         $contact["name"] = $noscrape["fn"];
 312                                                 }
 313                                                 if (isset($noscrape["comm"])) {
 314                                                         $contact["community"] = $noscrape["comm"];
 315                                                 }
 316                                                 if (isset($noscrape["tags"])) {
 317                                                         $keywords = implode(" ", $noscrape["tags"]);
 318                                                         if ($keywords != "") {
 319                                                                 $contact["keywords"] = $keywords;
 320                                                         }
 321                                                 }
 322
 323                                                 $location = Profile::formatLocation($noscrape);
 324                                                 if ($location) {
 325                                                         $contact["location"] = $location;
 326                                                 }
 327                                                 if (isset($noscrape["dfrn-notify"])) {
 328                                                         $contact["notify"] = $noscrape["dfrn-notify"];
 329                                                 }
 330                                                 // Remove all fields that are not present in the gcontact table
 331                                                 unset($noscrape["fn"]);
 332                                                 unset($noscrape["key"]);
 333                                                 unset($noscrape["homepage"]);
 334                                                 unset($noscrape["comm"]);
 335                                                 unset($noscrape["tags"]);
 336                                                 unset($noscrape["locality"]);
 337                                                 unset($noscrape["region"]);
 338                                                 unset($noscrape["country-name"]);
 339                                                 unset($noscrape["contacts"]);
 340                                                 unset($noscrape["dfrn-request"]);
 341                                                 unset($noscrape["dfrn-confirm"]);
 342                                                 unset($noscrape["dfrn-notify"]);
 343                                                 unset($noscrape["dfrn-poll"]);
 344
 345                                                 // Set the date of the last contact
 346                                                 /// @todo By now the function "update_gcontact" doesn't work with this field
 347                                                 //$contact["last_contact"] = DateTimeFormat::utcNow();
 348
 349                                                 $contact = array_merge($contact, $noscrape);
 350
 351                                                 GContact::update($contact);
 352
 353                                                 if (!empty($noscrape["updated"])) {
 354                                                         $fields = ['last_contact' => DateTimeFormat::utcNow()];
 355                                                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($profile)]);
 356
 357                                                         Logger::log("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", Logger::DEBUG);
 358
 359                                                         return $noscrape["updated"];
 360                                                 }
 361                                         }
 362                                 }
 363                         }
 364                 }
 365
 366                 // If we only can poll the feed, then we only do this once a while
 367                 if (!$force && !self::updateNeeded($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
 368                         Logger::log("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", Logger::DEBUG);
 369
 370                         GContact::update($contact);
 371                         return $gcontacts[0]["updated"];
 372                 }
 373
 374                 $data = Probe::uri($profile);
 375
 376                 // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 377                 // Then check the other link and delete this one
 378                 if (($data["network"] == Protocol::OSTATUS) && self::alternateOStatusUrl($profile)
 379                         && (Strings::normaliseLink($profile) == Strings::normaliseLink($data["alias"]))
 380                         && (Strings::normaliseLink($profile) != Strings::normaliseLink($data["url"]))
 381                 ) {
 382                         // Delete the old entry
 383                         DBA::delete('gcontact', ['nurl' => Strings::normaliseLink($profile)]);
 384
 385                         $gcontact = array_merge($gcontacts[0], $data);
 386
 387                         $gcontact["server_url"] = $data["baseurl"];
 388
 389                         try {
 390                                 $gcontact = GContact::sanitize($gcontact);
 391                                 GContact::update($gcontact);
 392
 393                                 self::lastUpdated($data["url"], $force);
 394                         } catch (Exception $e) {
 395                                 Logger::log($e->getMessage(), Logger::DEBUG);
 396                         }
 397
 398                         Logger::log("Profile ".$profile." was deleted", Logger::DEBUG);
 399                         return false;
 400                 }
 401
 402                 if (($data["poll"] == "") || (in_array($data["network"], [Protocol::FEED, Protocol::PHANTOM]))) {
 403                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 404                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($profile)]);
 405
 406                         Logger::log("Profile ".$profile." wasn't reachable (profile)", Logger::DEBUG);
 407                         return false;
 408                 }
 409
 410                 $contact = array_merge($contact, $data);
 411
 412                 $contact["server_url"] = $data["baseurl"];
 413
 414                 GContact::update($contact);
 415
 416                 $curlResult = Network::curl($data["poll"]);
 417
 418                 if (!$curlResult->isSuccess()) {
 419                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 420                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($profile)]);
 421
 422                         Logger::log("Profile ".$profile." wasn't reachable (no feed)", Logger::DEBUG);
 423                         return false;
 424                 }
 425
 426                 $doc = new DOMDocument();
 427                 /// @TODO Avoid error supression here
 428                 @$doc->loadXML($curlResult->getBody());
 429
 430                 $xpath = new DOMXPath($doc);
 431                 $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 432
 433                 $entries = $xpath->query('/atom:feed/atom:entry');
 434
 435                 $last_updated = "";
 436
 437                 foreach ($entries as $entry) {
 438                         $published_item = $xpath->query('atom:published/text()', $entry)->item(0);
 439                         $updated_item   = $xpath->query('atom:updated/text()'  , $entry)->item(0);
 440                         $published      = isset($published_item->nodeValue) ? DateTimeFormat::utc($published_item->nodeValue) : null;
 441                         $updated        = isset($updated_item->nodeValue) ? DateTimeFormat::utc($updated_item->nodeValue) : null;
 442
 443                         if (!isset($published) || !isset($updated)) {
 444                                 Logger::notice('Invalid entry for XPath.', ['entry' => $entry, 'profile' => $profile]);
 445                                 continue;
 446                         }
 447
 448                         if ($last_updated < $published) {
 449                                 $last_updated = $published;
 450                         }
 451
 452                         if ($last_updated < $updated) {
 453                                 $last_updated = $updated;
 454                         }
 455                 }
 456
 457                 // Maybe there aren't any entries. Then check if it is a valid feed
 458                 if ($last_updated == "") {
 459                         if ($xpath->query('/atom:feed')->length > 0) {
 460                                 $last_updated = DBA::NULL_DATETIME;
 461                         }
 462                 }
 463
 464                 $fields = ['last_contact' => DateTimeFormat::utcNow()];
 465
 466                 if (!empty($last_updated)) {
 467                         $fields['updated'] = $last_updated;
 468                 }
 469
 470                 DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($profile)]);
 471
 472                 if (($gcontacts[0]["generation"] == 0)) {
 473                         $fields = ['generation' => 9];
 474                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($profile)]);
 475                 }
 476
 477                 Logger::log("Profile ".$profile." was last updated at ".$last_updated, Logger::DEBUG);
 478
 479                 return $last_updated;
 480         }
 481
 482         public static function updateNeeded($created, $updated, $last_failure, $last_contact)
 483         {
 484                 $now = strtotime(DateTimeFormat::utcNow());
 485
 486                 if ($updated > $last_contact) {
 487                         $contact_time = strtotime($updated);
 488                 } else {
 489                         $contact_time = strtotime($last_contact);
 490                 }
 491
 492                 $failure_time = strtotime($last_failure);
 493                 $created_time = strtotime($created);
 494
 495                 // If there is no "created" time then use the current time
 496                 if ($created_time <= 0) {
 497                         $created_time = $now;
 498                 }
 499
 500                 // If the last contact was less than 24 hours then don't update
 501                 if (($now - $contact_time) < (60 * 60 * 24)) {
 502                         return false;
 503                 }
 504
 505                 // If the last failure was less than 24 hours then don't update
 506                 if (($now - $failure_time) < (60 * 60 * 24)) {
 507                         return false;
 508                 }
 509
 510                 // If the last contact was less than a week ago and the last failure is older than a week then don't update
 511                 //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time))
 512                 //      return false;
 513
 514                 // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 515                 if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7))) {
 516                         return false;
 517                 }
 518
 519                 // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 520                 if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30))) {
 521                         return false;
 522                 }
 523
 524                 return true;
 525         }
 526
 527         /**
 528          * @brief Returns a list of all known servers
 529          * @return array List of server urls
 530          * @throws Exception
 531          */
 532         public static function serverlist()
 533         {
 534                 $r = q(
 535                         "SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
 536                         WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
 537                         ORDER BY `last_contact`
 538                         LIMIT 1000",
 539                         DBA::escape(Protocol::DFRN),
 540                         DBA::escape(Protocol::DIASPORA),
 541                         DBA::escape(Protocol::OSTATUS)
 542                 );
 543
 544                 if (!DBA::isResult($r)) {
 545                         return false;
 546                 }
 547
 548                 return $r;
 549         }
 550
 551         /**
 552          * @brief Fetch server list from remote servers and adds them when they are new.
 553          *
 554          * @param string $poco URL to the POCO endpoint
 555          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 556          */
 557         private static function fetchServerlist($poco)
 558         {
 559                 $curlResult = Network::curl($poco . "/@server");
 560
 561                 if (!$curlResult->isSuccess()) {
 562                         return;
 563                 }
 564
 565                 $serverlist = json_decode($curlResult->getBody(), true);
 566
 567                 if (!is_array($serverlist)) {
 568                         return;
 569                 }
 570
 571                 foreach ($serverlist as $server) {
 572                         $server_url = str_replace("/index.php", "", $server['url']);
 573
 574                         $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", DBA::escape(Strings::normaliseLink($server_url)));
 575
 576                         if (!DBA::isResult($r)) {
 577                                 Logger::log("Call server check for server ".$server_url, Logger::DEBUG);
 578                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", $server_url);
 579                         }
 580                 }
 581         }
 582
 583         private static function discoverFederation()
 584         {
 585                 $last = Config::get('poco', 'last_federation_discovery');
 586
 587                 if ($last) {
 588                         $next = $last + (24 * 60 * 60);
 589
 590                         if ($next > time()) {
 591                                 return;
 592                         }
 593                 }
 594
 595                 // Discover Friendica, Hubzilla and Diaspora servers
 596                 $curlResult = Network::fetchUrl("http://the-federation.info/pods.json");
 597
 598                 if (!empty($curlResult)) {
 599                         $servers = json_decode($curlResult, true);
 600
 601                         if (!empty($servers['pods'])) {
 602                                 foreach ($servers['pods'] as $server) {
 603                                         Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", "https://" . $server['host']);
 604                                 }
 605                         }
 606                 }
 607
 608                 // Disvover Mastodon servers
 609                 if (!Config::get('system', 'ostatus_disabled')) {
 610                         $accesstoken = Config::get('system', 'instances_social_key');
 611
 612                         if (!empty($accesstoken)) {
 613                                 $api = 'https://instances.social/api/1.0/instances/list?count=0';
 614                                 $header = ['Authorization: Bearer '.$accesstoken];
 615                                 $curlResult = Network::curl($api, false, ['headers' => $header]);
 616
 617                                 if ($curlResult->isSuccess()) {
 618                                         $servers = json_decode($curlResult->getBody(), true);
 619
 620                                         foreach ($servers['instances'] as $server) {
 621                                                 $url = (is_null($server['https_score']) ? 'http' : 'https') . '://' . $server['name'];
 622                                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", $url);
 623                                         }
 624                                 }
 625                         }
 626                 }
 627
 628                 // Currently disabled, since the service isn't available anymore.
 629                 // It is not removed since I hope that there will be a successor.
 630                 // Discover GNU Social Servers.
 631                 //if (!Config::get('system','ostatus_disabled')) {
 632                 //      $serverdata = "http://gstools.org/api/get_open_instances/";
 633
 634                 //      $curlResult = Network::curl($serverdata);
 635                 //      if ($curlResult->isSuccess()) {
 636                 //              $servers = json_decode($result->getBody(), true);
 637
 638                 //              foreach($servers['data'] as $server)
 639                 //                      GServer::check($server['instance_address']);
 640                 //      }
 641                 //}
 642
 643                 Config::set('poco', 'last_federation_discovery', time());
 644         }
 645
 646         public static function discoverSingleServer($id)
 647         {
 648                 $server = DBA::selectFirst('gserver', ['poco', 'nurl', 'url', 'network'], ['id' => $id]);
 649
 650                 if (!DBA::isResult($server)) {
 651                         return false;
 652                 }
 653
 654                 // Discover new servers out there (Works from Friendica version 3.5.2)
 655                 self::fetchServerlist($server["poco"]);
 656
 657                 // Fetch all users from the other server
 658                 $url = $server["poco"] . "/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
 659
 660                 Logger::info("Fetch all users from the server " . $server["url"]);
 661
 662                 $curlResult = Network::curl($url);
 663
 664                 if ($curlResult->isSuccess() && !empty($curlResult->getBody())) {
 665                         $data = json_decode($curlResult->getBody(), true);
 666
 667                         if (!empty($data)) {
 668                                 self::discoverServer($data, 2);
 669                         }
 670
 671                         if (Config::get('system', 'poco_discovery') >= self::USERS_GCONTACTS) {
 672                                 $timeframe = Config::get('system', 'poco_discovery_since');
 673
 674                                 if ($timeframe == 0) {
 675                                         $timeframe = 30;
 676                                 }
 677
 678                                 $updatedSince = date(DateTimeFormat::MYSQL, time() - $timeframe * 86400);
 679
 680                                 // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
 681                                 $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
 682
 683                                 $success = false;
 684
 685                                 $curlResult = Network::curl($url);
 686
 687                                 if ($curlResult->isSuccess() && !empty($curlResult->getBody())) {
 688                                         Logger::info("Fetch all global contacts from the server " . $server["nurl"]);
 689                                         $data = json_decode($curlResult->getBody(), true);
 690
 691                                         if (!empty($data)) {
 692                                                 $success = self::discoverServer($data);
 693                                         }
 694                                 }
 695
 696                                 if (!$success && !empty($data) && Config::get('system', 'poco_discovery') >= self::USERS_GCONTACTS_FALLBACK) {
 697                                         Logger::info("Fetch contacts from users of the server " . $server["nurl"]);
 698                                         self::discoverServerUsers($data, $server);
 699                                 }
 700                         }
 701
 702                         $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
 703                         DBA::update('gserver', $fields, ['nurl' => $server["nurl"]]);
 704
 705                         return true;
 706                 } else {
 707                         // If the server hadn't replied correctly, then force a sanity check
 708                         GServer::check($server["url"], true);
 709
 710                         // If we couldn't reach the server, we will try it some time later
 711                         $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
 712                         DBA::update('gserver', $fields, ['nurl' => $server["nurl"]]);
 713
 714                         return false;
 715                 }
 716         }
 717
 718         public static function discover($complete = false)
 719         {
 720                 // Update the server list
 721                 self::discoverFederation();
 722
 723                 $no_of_queries = 5;
 724
 725                 $requery_days = intval(Config::get('system', 'poco_requery_days'));
 726
 727                 if ($requery_days == 0) {
 728                         $requery_days = 7;
 729                 }
 730
 731                 $last_update = date('c', time() - (60 * 60 * 24 * $requery_days));
 732
 733                 $gservers = q("SELECT `id`, `url`, `nurl`, `network`
 734                         FROM `gserver`
 735                         WHERE `last_contact` >= `last_failure`
 736                         AND `poco` != ''
 737                         AND `last_poco_query` < '%s'
 738                         ORDER BY RAND()", DBA::escape($last_update)
 739                 );
 740
 741                 if (DBA::isResult($gservers)) {
 742                         foreach ($gservers as $gserver) {
 743                                 if (!GServer::check($gserver['url'])) {
 744                                         // The server is not reachable? Okay, then we will try it later
 745                                         $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
 746                                         DBA::update('gserver', $fields, ['nurl' => $gserver['nurl']]);
 747                                         continue;
 748                                 }
 749
 750                                 Logger::log('Update directory from server ' . $gserver['url'] . ' with ID ' . $gserver['id'], Logger::DEBUG);
 751                                 Worker::add(PRIORITY_LOW, 'DiscoverPoCo', 'update_server_directory', (int) $gserver['id']);
 752
 753                                 if (!$complete && ( --$no_of_queries == 0)) {
 754                                         break;
 755                                 }
 756                         }
 757                 }
 758         }
 759
 760         private static function discoverServerUsers(array $data, array $server)
 761         {
 762                 if (!isset($data['entry'])) {
 763                         return;
 764                 }
 765
 766                 foreach ($data['entry'] as $entry) {
 767                         $username = '';
 768
 769                         if (isset($entry['urls'])) {
 770                                 foreach ($entry['urls'] as $url) {
 771                                         if ($url['type'] == 'profile') {
 772                                                 $profile_url = $url['value'];
 773                                                 $path_array = explode('/', parse_url($profile_url, PHP_URL_PATH));
 774                                                 $username = end($path_array);
 775                                         }
 776                                 }
 777                         }
 778
 779                         if ($username != '') {
 780                                 Logger::log('Fetch contacts for the user ' . $username . ' from the server ' . $server['nurl'], Logger::DEBUG);
 781
 782                                 // Fetch all contacts from a given user from the other server
 783                                 $url = $server['poco'] . '/' . $username . '/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation';
 784
 785                                 $curlResult = Network::curl($url);
 786
 787                                 if ($curlResult->isSuccess()) {
 788                                         $data = json_decode($curlResult->getBody(), true);
 789
 790                                         if (!empty($data)) {
 791                                                 self::discoverServer($data, 3);
 792                                         }
 793                                 }
 794                         }
 795                 }
 796         }
 797
 798         private static function discoverServer(array $data, $default_generation = 0)
 799         {
 800                 if (empty($data['entry'])) {
 801                         return false;
 802                 }
 803
 804                 $success = false;
 805
 806                 foreach ($data['entry'] as $entry) {
 807                         $profile_url = '';
 808                         $profile_photo = '';
 809                         $connect_url = '';
 810                         $name = '';
 811                         $network = '';
 812                         $updated = DBA::NULL_DATETIME;
 813                         $location = '';
 814                         $about = '';
 815                         $keywords = '';
 816                         $gender = '';
 817                         $contact_type = -1;
 818                         $generation = $default_generation;
 819
 820                         if (!empty($entry['displayName'])) {
 821                                 $name = $entry['displayName'];
 822                         }
 823
 824                         if (isset($entry['urls'])) {
 825                                 foreach ($entry['urls'] as $url) {
 826                                         if ($url['type'] == 'profile') {
 827                                                 $profile_url = $url['value'];
 828                                                 continue;
 829                                         }
 830                                         if ($url['type'] == 'webfinger') {
 831                                                 $connect_url = str_replace('acct:' , '', $url['value']);
 832                                                 continue;
 833                                         }
 834                                 }
 835                         }
 836
 837                         if (isset($entry['photos'])) {
 838                                 foreach ($entry['photos'] as $photo) {
 839                                         if ($photo['type'] == 'profile') {
 840                                                 $profile_photo = $photo['value'];
 841                                                 continue;
 842                                         }
 843                                 }
 844                         }
 845
 846                         if (isset($entry['updated'])) {
 847                                 $updated = date(DateTimeFormat::MYSQL, strtotime($entry['updated']));
 848                         }
 849
 850                         if (isset($entry['network'])) {
 851                                 $network = $entry['network'];
 852                         }
 853
 854                         if (isset($entry['currentLocation'])) {
 855                                 $location = $entry['currentLocation'];
 856                         }
 857
 858                         if (isset($entry['aboutMe'])) {
 859                                 $about = HTML::toBBCode($entry['aboutMe']);
 860                         }
 861
 862                         if (isset($entry['gender'])) {
 863                                 $gender = $entry['gender'];
 864                         }
 865
 866                         if (isset($entry['generation']) && ($entry['generation'] > 0)) {
 867                                 $generation = ++$entry['generation'];
 868                         }
 869
 870                         if (isset($entry['contactType']) && ($entry['contactType'] >= 0)) {
 871                                 $contact_type = $entry['contactType'];
 872                         }
 873
 874                         if (isset($entry['tags'])) {
 875                                 foreach ($entry['tags'] as $tag) {
 876                                         $keywords = implode(", ", $tag);
 877                                 }
 878                         }
 879
 880                         if ($generation > 0) {
 881                                 $success = true;
 882
 883                                 Logger::log("Store profile ".$profile_url, Logger::DEBUG);
 884
 885                                 $gcontact = ["url" => $profile_url,
 886                                                 "name" => $name,
 887                                                 "network" => $network,
 888                                                 "photo" => $profile_photo,
 889                                                 "about" => $about,
 890                                                 "location" => $location,
 891                                                 "gender" => $gender,
 892                                                 "keywords" => $keywords,
 893                                                 "connect" => $connect_url,
 894                                                 "updated" => $updated,
 895                                                 "contact-type" => $contact_type,
 896                                                 "generation" => $generation];
 897
 898                                 try {
 899                                         $gcontact = GContact::sanitize($gcontact);
 900                                         GContact::update($gcontact);
 901                                 } catch (Exception $e) {
 902                                         Logger::log($e->getMessage(), Logger::DEBUG);
 903                                 }
 904
 905                                 Logger::log("Done for profile ".$profile_url, Logger::DEBUG);
 906                         }
 907                 }
 908                 return $success;
 909         }
 910
 911 }