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 Friendica\Core\Config;
  13 use Friendica\Core\Worker;
  14 use Friendica\Database\DBM;
  15 use Friendica\Model\GContact;
  16 use Friendica\Model\Profile;
  17 use Friendica\Network\Probe;
  18 use Friendica\Util\Network;
  19 use Friendica\Util\Temporal;
  20 use dba;
  21 use DOMDocument;
  22 use DOMXPath;
  23 use Exception;
  24
  25 require_once 'include/dba.php';
  26 require_once 'include/datetime.php';
  27 require_once 'include/html2bbcode.php';
  28
  29 class PortableContact
  30 {
  31         /**
  32          * @brief Fetch POCO data
  33          *
  34          * @param integer $cid  Contact ID
  35          * @param integer $uid  User ID
  36          * @param integer $zcid Global Contact ID
  37          * @param integer $url  POCO address that should be polled
  38          *
  39          * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  40          * and add the entries to the gcontact (Global Contact) table, or update existing entries
  41          * if anything (name or photo) has changed.
  42          * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  43          *
  44          * Once the global contact is stored add (if necessary) the contact linkage which associates
  45          * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  46          * pointing to the same global contact id.
  47          *
  48          */
  49         public static function loadWorker($cid, $uid = 0, $zcid = 0, $url = null)
  50         {
  51                 // Call the function "load" via the worker
  52                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "load", (int)$cid, (int)$uid, (int)$zcid, $url);
  53         }
  54
  55         /**
  56          * @brief Fetch POCO data from the worker
  57          *
  58          * @param integer $cid  Contact ID
  59          * @param integer $uid  User ID
  60          * @param integer $zcid Global Contact ID
  61          * @param integer $url  POCO address that should be polled
  62          *
  63          */
  64         public static function load($cid, $uid, $zcid, $url)
  65         {
  66                 $a = get_app();
  67
  68                 if ($cid) {
  69                         if (!$url || !$uid) {
  70                                 $contact = dba::selectFirst('contact', ['poco', 'uid'], ['id' => $cid]);
  71                                 if (DBM::is_result($contact)) {
  72                                         $url = $contact['poco'];
  73                                         $uid = $contact['uid'];
  74                                 }
  75                         }
  76                         if (!$uid) {
  77                                 return;
  78                         }
  79                 }
  80
  81                 if (!$url) {
  82                         return;
  83                 }
  84
  85                 $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') ;
  86
  87                 logger('load: ' . $url, LOGGER_DEBUG);
  88
  89                 $s = Network::fetchUrl($url);
  90
  91                 logger('load: returns ' . $s, LOGGER_DATA);
  92
  93                 logger('load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);
  94
  95                 if (($a->get_curl_code() > 299) || (! $s)) {
  96                         return;
  97                 }
  98
  99                 $j = json_decode($s);
 100
 101                 logger('load: json: ' . print_r($j, true), LOGGER_DATA);
 102
 103                 if (! isset($j->entry)) {
 104                         return;
 105                 }
 106
 107                 $total = 0;
 108                 foreach ($j->entry as $entry) {
 109                         $total ++;
 110                         $profile_url = '';
 111                         $profile_photo = '';
 112                         $connect_url = '';
 113                         $name = '';
 114                         $network = '';
 115                         $updated = NULL_DATE;
 116                         $location = '';
 117                         $about = '';
 118                         $keywords = '';
 119                         $gender = '';
 120                         $contact_type = -1;
 121                         $generation = 0;
 122
 123                         $name = $entry->displayName;
 124
 125                         if (isset($entry->urls)) {
 126                                 foreach ($entry->urls as $url) {
 127                                         if ($url->type == 'profile') {
 128                                                 $profile_url = $url->value;
 129                                                 continue;
 130                                         }
 131                                         if ($url->type == 'webfinger') {
 132                                                 $connect_url = str_replace('acct:', '', $url->value);
 133                                                 continue;
 134                                         }
 135                                 }
 136                         }
 137                         if (isset($entry->photos)) {
 138                                 foreach ($entry->photos as $photo) {
 139                                         if ($photo->type == 'profile') {
 140                                                 $profile_photo = $photo->value;
 141                                                 continue;
 142                                         }
 143                                 }
 144                         }
 145
 146                         if (isset($entry->updated)) {
 147                                 $updated = date(Temporal::MYSQL, strtotime($entry->updated));
 148                         }
 149
 150                         if (isset($entry->network)) {
 151                                 $network = $entry->network;
 152                         }
 153
 154                         if (isset($entry->currentLocation)) {
 155                                 $location = $entry->currentLocation;
 156                         }
 157
 158                         if (isset($entry->aboutMe)) {
 159                                 $about = html2bbcode($entry->aboutMe);
 160                         }
 161
 162                         if (isset($entry->gender)) {
 163                                 $gender = $entry->gender;
 164                         }
 165
 166                         if (isset($entry->generation) && ($entry->generation > 0)) {
 167                                 $generation = ++$entry->generation;
 168                         }
 169
 170                         if (isset($entry->tags)) {
 171                                 foreach ($entry->tags as $tag) {
 172                                         $keywords = implode(", ", $tag);
 173                                 }
 174                         }
 175
 176                         if (isset($entry->contactType) && ($entry->contactType >= 0)) {
 177                                 $contact_type = $entry->contactType;
 178                         }
 179
 180                         $gcontact = ["url" => $profile_url,
 181                                         "name" => $name,
 182                                         "network" => $network,
 183                                         "photo" => $profile_photo,
 184                                         "about" => $about,
 185                                         "location" => $location,
 186                                         "gender" => $gender,
 187                                         "keywords" => $keywords,
 188                                         "connect" => $connect_url,
 189                                         "updated" => $updated,
 190                                         "contact-type" => $contact_type,
 191                                         "generation" => $generation];
 192
 193                         try {
 194                                 $gcontact = GContact::sanitize($gcontact);
 195                                 $gcid = GContact::update($gcontact);
 196
 197                                 GContact::link($gcid, $uid, $cid, $zcid);
 198                         } catch (Exception $e) {
 199                                 logger($e->getMessage(), LOGGER_DEBUG);
 200                         }
 201                 }
 202                 logger("load: loaded $total entries", LOGGER_DEBUG);
 203
 204                 $condition = ["`cid` = ? AND `uid` = ? AND `zcid` = ? AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY", $cid, $uid, $zcid];
 205                 dba::delete('glink', $condition);
 206         }
 207
 208         public static function reachable($profile, $server = "", $network = "", $force = false)
 209         {
 210                 if ($server == "") {
 211                         $server = self::detectServer($profile);
 212                 }
 213
 214                 if ($server == "") {
 215                         return true;
 216                 }
 217
 218                 return self::checkServer($server, $network, $force);
 219         }
 220
 221         public static function detectServer($profile)
 222         {
 223                 // Try to detect the server path based upon some known standard paths
 224                 $server_url = "";
 225
 226                 if ($server_url == "") {
 227                         $friendica = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $profile);
 228                         if ($friendica != $profile) {
 229                                 $server_url = $friendica;
 230                                 $network = NETWORK_DFRN;
 231                         }
 232                 }
 233
 234                 if ($server_url == "") {
 235                         $diaspora = preg_replace("=(https?://)(.*)/u/(.*)=ism", "$1$2", $profile);
 236                         if ($diaspora != $profile) {
 237                                 $server_url = $diaspora;
 238                                 $network = NETWORK_DIASPORA;
 239                         }
 240                 }
 241
 242                 if ($server_url == "") {
 243                         $red = preg_replace("=(https?://)(.*)/channel/(.*)=ism", "$1$2", $profile);
 244                         if ($red != $profile) {
 245                                 $server_url = $red;
 246                                 $network = NETWORK_DIASPORA;
 247                         }
 248                 }
 249
 250                 // Mastodon
 251                 if ($server_url == "") {
 252                         $mastodon = preg_replace("=(https?://)(.*)/users/(.*)=ism", "$1$2", $profile);
 253                         if ($mastodon != $profile) {
 254                                 $server_url = $mastodon;
 255                                 $network = NETWORK_OSTATUS;
 256                         }
 257                 }
 258
 259                 // Numeric OStatus variant
 260                 if ($server_url == "") {
 261                         $ostatus = preg_replace("=(https?://)(.*)/user/(.*)=ism", "$1$2", $profile);
 262                         if ($ostatus != $profile) {
 263                                 $server_url = $ostatus;
 264                                 $network = NETWORK_OSTATUS;
 265                         }
 266                 }
 267
 268                 // Wild guess
 269                 if ($server_url == "") {
 270                         $base = preg_replace("=(https?://)(.*?)/(.*)=ism", "$1$2", $profile);
 271                         if ($base != $profile) {
 272                                 $server_url = $base;
 273                                 $network = NETWORK_PHANTOM;
 274                         }
 275                 }
 276
 277                 if ($server_url == "") {
 278                         return "";
 279                 }
 280
 281                 $r = q(
 282                         "SELECT `id` FROM `gserver` WHERE `nurl` = '%s' AND `last_contact` > `last_failure`",
 283                         dbesc(normalise_link($server_url))
 284                 );
 285
 286                 if (DBM::is_result($r)) {
 287                         return $server_url;
 288                 }
 289
 290                 // Fetch the host-meta to check if this really is a server
 291                 $serverret = Network::curl($server_url."/.well-known/host-meta");
 292                 if (!$serverret["success"]) {
 293                         return "";
 294                 }
 295
 296                 return $server_url;
 297         }
 298
 299         public static function alternateOStatusUrl($url)
 300         {
 301                 return(preg_match("=https?://.+/user/\d+=ism", $url, $matches));
 302         }
 303
 304         public static function lastUpdated($profile, $force = false)
 305         {
 306                 $gcontacts = q(
 307                         "SELECT * FROM `gcontact` WHERE `nurl` = '%s'",
 308                         dbesc(normalise_link($profile))
 309                 );
 310
 311                 if (!DBM::is_result($gcontacts)) {
 312                         return false;
 313                 }
 314
 315                 $contact = ["url" => $profile];
 316
 317                 if ($gcontacts[0]["created"] <= NULL_DATE) {
 318                         $contact['created'] = Temporal::utcNow();
 319                 }
 320
 321                 if ($force) {
 322                         $server_url = normalise_link(self::detectServer($profile));
 323                 }
 324
 325                 if (($server_url == '') && ($gcontacts[0]["server_url"] != "")) {
 326                         $server_url = $gcontacts[0]["server_url"];
 327                 }
 328
 329                 if (!$force && (($server_url == '') || ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
 330                         $server_url = normalise_link(self::detectServer($profile));
 331                 }
 332
 333                 if (!in_array($gcontacts[0]["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_FEED, NETWORK_OSTATUS, ""])) {
 334                         logger("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", LOGGER_DEBUG);
 335                         return false;
 336                 }
 337
 338                 if ($server_url != "") {
 339                         if (!self::checkServer($server_url, $gcontacts[0]["network"], $force)) {
 340                                 if ($force) {
 341                                         $fields = ['last_failure' => Temporal::utcNow()];
 342                                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 343                                 }
 344
 345                                 logger("Profile ".$profile.": Server ".$server_url." wasn't reachable.", LOGGER_DEBUG);
 346                                 return false;
 347                         }
 348                         $contact['server_url'] = $server_url;
 349                 }
 350
 351                 if (in_array($gcontacts[0]["network"], ["", NETWORK_FEED])) {
 352                         $server = q(
 353                                 "SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 354                                 dbesc(normalise_link($server_url))
 355                         );
 356
 357                         if ($server) {
 358                                 $contact['network'] = $server[0]["network"];
 359                         } else {
 360                                 return false;
 361                         }
 362                 }
 363
 364                 // noscrape is really fast so we don't cache the call.
 365                 if (($server_url != "") && ($gcontacts[0]["nick"] != "")) {
 366                         //  Use noscrape if possible
 367                         $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($server_url)));
 368
 369                         if ($server) {
 370                                 $noscraperet = Network::curl($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 371
 372                                 if ($noscraperet["success"] && ($noscraperet["body"] != "")) {
 373                                         $noscrape = json_decode($noscraperet["body"], true);
 374
 375                                         if (is_array($noscrape)) {
 376                                                 $contact["network"] = $server[0]["network"];
 377
 378                                                 if (isset($noscrape["fn"])) {
 379                                                         $contact["name"] = $noscrape["fn"];
 380                                                 }
 381                                                 if (isset($noscrape["comm"])) {
 382                                                         $contact["community"] = $noscrape["comm"];
 383                                                 }
 384                                                 if (isset($noscrape["tags"])) {
 385                                                         $keywords = implode(" ", $noscrape["tags"]);
 386                                                         if ($keywords != "") {
 387                                                                 $contact["keywords"] = $keywords;
 388                                                         }
 389                                                 }
 390
 391                                                 $location = Profile::formatLocation($noscrape);
 392                                                 if ($location) {
 393                                                         $contact["location"] = $location;
 394                                                 }
 395                                                 if (isset($noscrape["dfrn-notify"])) {
 396                                                         $contact["notify"] = $noscrape["dfrn-notify"];
 397                                                 }
 398                                                 // Remove all fields that are not present in the gcontact table
 399                                                 unset($noscrape["fn"]);
 400                                                 unset($noscrape["key"]);
 401                                                 unset($noscrape["homepage"]);
 402                                                 unset($noscrape["comm"]);
 403                                                 unset($noscrape["tags"]);
 404                                                 unset($noscrape["locality"]);
 405                                                 unset($noscrape["region"]);
 406                                                 unset($noscrape["country-name"]);
 407                                                 unset($noscrape["contacts"]);
 408                                                 unset($noscrape["dfrn-request"]);
 409                                                 unset($noscrape["dfrn-confirm"]);
 410                                                 unset($noscrape["dfrn-notify"]);
 411                                                 unset($noscrape["dfrn-poll"]);
 412
 413                                                 // Set the date of the last contact
 414                                                 /// @todo By now the function "update_gcontact" doesn't work with this field
 415                                                 //$contact["last_contact"] = Temporal::utcNow();
 416
 417                                                 $contact = array_merge($contact, $noscrape);
 418
 419                                                 GContact::update($contact);
 420
 421                                                 if (trim($noscrape["updated"]) != "") {
 422                                                         $fields = ['last_contact' => Temporal::utcNow()];
 423                                                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 424
 425                                                         logger("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", LOGGER_DEBUG);
 426
 427                                                         return $noscrape["updated"];
 428                                                 }
 429                                         }
 430                                 }
 431                         }
 432                 }
 433
 434                 // If we only can poll the feed, then we only do this once a while
 435                 if (!$force && !self::updateNeeded($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
 436                         logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 437
 438                         GContact::update($contact);
 439                         return $gcontacts[0]["updated"];
 440                 }
 441
 442                 $data = Probe::uri($profile);
 443
 444                 // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 445                 // Then check the other link and delete this one
 446                 if (($data["network"] == NETWORK_OSTATUS) && self::alternateOStatusUrl($profile)
 447                         && (normalise_link($profile) == normalise_link($data["alias"]))
 448                         && (normalise_link($profile) != normalise_link($data["url"]))
 449                 ) {
 450                         // Delete the old entry
 451                         dba::delete('gcontact', ['nurl' => normalise_link($profile)]);
 452
 453                         $gcontact = array_merge($gcontacts[0], $data);
 454
 455                         $gcontact["server_url"] = $data["baseurl"];
 456
 457                         try {
 458                                 $gcontact = GContact::sanitize($gcontact);
 459                                 GContact::update($gcontact);
 460
 461                                 self::lastUpdated($data["url"], $force);
 462                         } catch (Exception $e) {
 463                                 logger($e->getMessage(), LOGGER_DEBUG);
 464                         }
 465
 466                         logger("Profile ".$profile." was deleted", LOGGER_DEBUG);
 467                         return false;
 468                 }
 469
 470                 if (($data["poll"] == "") || (in_array($data["network"], [NETWORK_FEED, NETWORK_PHANTOM]))) {
 471                         $fields = ['last_failure' => Temporal::utcNow()];
 472                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 473
 474                         logger("Profile ".$profile." wasn't reachable (profile)", LOGGER_DEBUG);
 475                         return false;
 476                 }
 477
 478                 $contact = array_merge($contact, $data);
 479
 480                 $contact["server_url"] = $data["baseurl"];
 481
 482                 GContact::update($contact);
 483
 484                 $feedret = Network::curl($data["poll"]);
 485
 486                 if (!$feedret["success"]) {
 487                         $fields = ['last_failure' => Temporal::utcNow()];
 488                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 489
 490                         logger("Profile ".$profile." wasn't reachable (no feed)", LOGGER_DEBUG);
 491                         return false;
 492                 }
 493
 494                 $doc = new DOMDocument();
 495                 @$doc->loadXML($feedret["body"]);
 496
 497                 $xpath = new DOMXPath($doc);
 498                 $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 499
 500                 $entries = $xpath->query('/atom:feed/atom:entry');
 501
 502                 $last_updated = "";
 503
 504                 foreach ($entries as $entry) {
 505                         $published = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 506                         $updated = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 507
 508                         if ($last_updated < $published)
 509                                 $last_updated = $published;
 510
 511                         if ($last_updated < $updated)
 512                                 $last_updated = $updated;
 513                 }
 514
 515                 // Maybe there aren't any entries. Then check if it is a valid feed
 516                 if ($last_updated == "") {
 517                         if ($xpath->query('/atom:feed')->length > 0) {
 518                                 $last_updated = NULL_DATE;
 519                         }
 520                 }
 521                 $fields = ['updated' => DBM::date($last_updated), 'last_contact' => DBM::date()];
 522                 dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 523
 524                 if (($gcontacts[0]["generation"] == 0)) {
 525                         $fields = ['generation' => 9];
 526                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 527                 }
 528
 529                 logger("Profile ".$profile." was last updated at ".$last_updated, LOGGER_DEBUG);
 530
 531                 return($last_updated);
 532         }
 533
 534         public static function updateNeeded($created, $updated, $last_failure, $last_contact)
 535         {
 536                 $now = strtotime(Temporal::utcNow());
 537
 538                 if ($updated > $last_contact) {
 539                         $contact_time = strtotime($updated);
 540                 } else {
 541                         $contact_time = strtotime($last_contact);
 542                 }
 543
 544                 $failure_time = strtotime($last_failure);
 545                 $created_time = strtotime($created);
 546
 547                 // If there is no "created" time then use the current time
 548                 if ($created_time <= 0) {
 549                         $created_time = $now;
 550                 }
 551
 552                 // If the last contact was less than 24 hours then don't update
 553                 if (($now - $contact_time) < (60 * 60 * 24)) {
 554                         return false;
 555                 }
 556
 557                 // If the last failure was less than 24 hours then don't update
 558                 if (($now - $failure_time) < (60 * 60 * 24)) {
 559                         return false;
 560                 }
 561
 562                 // If the last contact was less than a week ago and the last failure is older than a week then don't update
 563                 //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time))
 564                 //      return false;
 565
 566                 // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 567                 if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7))) {
 568                         return false;
 569                 }
 570
 571                 // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 572                 if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30))) {
 573                         return false;
 574                 }
 575
 576                 return true;
 577         }
 578
 579         private static function toBoolean($val)
 580         {
 581                 if (($val == "true") || ($val == 1)) {
 582                         return true;
 583                 } elseif (($val == "false") || ($val == 0)) {
 584                         return false;
 585                 }
 586
 587                 return $val;
 588         }
 589
 590         /**
 591          * @brief Detect server type (Hubzilla or Friendica) via the poco data
 592          *
 593          * @param object $data POCO data
 594          * @return array Server data
 595          */
 596         private static function detectPocoData($data)
 597         {
 598                 $server = false;
 599
 600                 if (!isset($data->entry)) {
 601                         return false;
 602                 }
 603
 604                 if (count($data->entry) == 0) {
 605                         return false;
 606                 }
 607
 608                 if (!isset($data->entry[0]->urls)) {
 609                         return false;
 610                 }
 611
 612                 if (count($data->entry[0]->urls) == 0) {
 613                         return false;
 614                 }
 615
 616                 foreach ($data->entry[0]->urls as $url) {
 617                         if ($url->type == 'zot') {
 618                                 $server = [];
 619                                 $server["platform"] = 'Hubzilla';
 620                                 $server["network"] = NETWORK_DIASPORA;
 621                                 return $server;
 622                         }
 623                 }
 624                 return false;
 625         }
 626
 627         /**
 628          * @brief Detect server type by using the nodeinfo data
 629          *
 630          * @param string $server_url address of the server
 631          * @return array Server data
 632          */
 633         private static function fetchNodeinfo($server_url)
 634         {
 635                 $serverret = Network::curl($server_url."/.well-known/nodeinfo");
 636                 if (!$serverret["success"]) {
 637                         return false;
 638                 }
 639
 640                 $nodeinfo = json_decode($serverret['body']);
 641
 642                 if (!is_object($nodeinfo)) {
 643                         return false;
 644                 }
 645
 646                 if (!is_array($nodeinfo->links)) {
 647                         return false;
 648                 }
 649
 650                 $nodeinfo1_url = '';
 651                 $nodeinfo2_url = '';
 652
 653                 foreach ($nodeinfo->links as $link) {
 654                         if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
 655                                 $nodeinfo1_url = $link->href;
 656                         }
 657                         if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/2.0') {
 658                                 $nodeinfo2_url = $link->href;
 659                         }
 660                 }
 661
 662                 if ($nodeinfo1_url . $nodeinfo2_url == '') {
 663                         return false;
 664                 }
 665
 666                 $server = [];
 667
 668                 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
 669                 if (!empty($nodeinfo2_url) && (parse_url($server_url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) {
 670                         $server = self::parseNodeinfo2($nodeinfo2_url);
 671                 }
 672
 673                 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
 674                 if (empty($server) && !empty($nodeinfo1_url) && (parse_url($server_url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) {
 675                         $server = self::parseNodeinfo1($nodeinfo1_url);
 676                 }
 677
 678                 return $server;
 679         }
 680
 681         /**
 682          * @brief Parses Nodeinfo 1
 683          *
 684          * @param string $nodeinfo_url address of the nodeinfo path
 685          * @return array Server data
 686          */
 687         private static function parseNodeinfo1($nodeinfo_url)
 688         {
 689                 $serverret = Network::curl($nodeinfo_url);
 690                 if (!$serverret["success"]) {
 691                         return false;
 692                 }
 693
 694                 $nodeinfo = json_decode($serverret['body']);
 695                 if (!is_object($nodeinfo)) {
 696                         return false;
 697                 }
 698
 699                 $server = [];
 700
 701                 $server['register_policy'] = REGISTER_CLOSED;
 702
 703                 if (is_bool($nodeinfo->openRegistrations) && $nodeinfo->openRegistrations) {
 704                         $server['register_policy'] = REGISTER_OPEN;
 705                 }
 706
 707                 if (is_object($nodeinfo->software)) {
 708                         if (isset($nodeinfo->software->name)) {
 709                                 $server['platform'] = $nodeinfo->software->name;
 710                         }
 711
 712                         if (isset($nodeinfo->software->version)) {
 713                                 $server['version'] = $nodeinfo->software->version;
 714                                 // Version numbers on Nodeinfo are presented with additional info, e.g.:
 715                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 716                                 $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 717                         }
 718                 }
 719
 720                 if (is_object($nodeinfo->metadata)) {
 721                         if (isset($nodeinfo->metadata->nodeName)) {
 722                                 $server['site_name'] = $nodeinfo->metadata->nodeName;
 723                         }
 724                 }
 725
 726                 if (!empty($nodeinfo->usage->users->total)) {
 727                         $server['registered-users'] = $nodeinfo->usage->users->total;
 728                 }
 729
 730                 $diaspora = false;
 731                 $friendica = false;
 732                 $gnusocial = false;
 733
 734                 if (is_array($nodeinfo->protocols->inbound)) {
 735                         foreach ($nodeinfo->protocols->inbound as $inbound) {
 736                                 if ($inbound == 'diaspora') {
 737                                         $diaspora = true;
 738                                 }
 739                                 if ($inbound == 'friendica') {
 740                                         $friendica = true;
 741                                 }
 742                                 if ($inbound == 'gnusocial') {
 743                                         $gnusocial = true;
 744                                 }
 745                         }
 746                 }
 747
 748                 if ($gnusocial) {
 749                         $server['network'] = NETWORK_OSTATUS;
 750                 }
 751                 if ($diaspora) {
 752                         $server['network'] = NETWORK_DIASPORA;
 753                 }
 754                 if ($friendica) {
 755                         $server['network'] = NETWORK_DFRN;
 756                 }
 757
 758                 if (!$server) {
 759                         return false;
 760                 }
 761
 762                 return $server;
 763         }
 764
 765         /**
 766          * @brief Parses Nodeinfo 2
 767          *
 768          * @param string $nodeinfo_url address of the nodeinfo path
 769          * @return array Server data
 770          */
 771         private static function parseNodeinfo2($nodeinfo_url)
 772         {
 773                 $serverret = Network::curl($nodeinfo_url);
 774                 if (!$serverret["success"]) {
 775                         return false;
 776                 }
 777
 778                 $nodeinfo = json_decode($serverret['body']);
 779                 if (!is_object($nodeinfo)) {
 780                         return false;
 781                 }
 782
 783                 $server = [];
 784
 785                 $server['register_policy'] = REGISTER_CLOSED;
 786
 787                 if (is_bool($nodeinfo->openRegistrations) && $nodeinfo->openRegistrations) {
 788                         $server['register_policy'] = REGISTER_OPEN;
 789                 }
 790
 791                 if (is_object($nodeinfo->software)) {
 792                         if (isset($nodeinfo->software->name)) {
 793                                 $server['platform'] = $nodeinfo->software->name;
 794                         }
 795
 796                         if (isset($nodeinfo->software->version)) {
 797                                 $server['version'] = $nodeinfo->software->version;
 798                                 // Version numbers on Nodeinfo are presented with additional info, e.g.:
 799                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 800                                 $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 801                         }
 802                 }
 803
 804                 if (is_object($nodeinfo->metadata)) {
 805                         if (isset($nodeinfo->metadata->nodeName)) {
 806                                 $server['site_name'] = $nodeinfo->metadata->nodeName;
 807                         }
 808                 }
 809
 810                 if (!empty($nodeinfo->usage->users->total)) {
 811                         $server['registered-users'] = $nodeinfo->usage->users->total;
 812                 }
 813
 814                 $diaspora = false;
 815                 $friendica = false;
 816                 $gnusocial = false;
 817
 818                 if (is_array($nodeinfo->protocols)) {
 819                         foreach ($nodeinfo->protocols as $protocol) {
 820                                 if ($protocol == 'diaspora') {
 821                                         $diaspora = true;
 822                                 }
 823                                 if ($protocol == 'friendica') {
 824                                         $friendica = true;
 825                                 }
 826                                 if ($protocol == 'gnusocial') {
 827                                         $gnusocial = true;
 828                                 }
 829                         }
 830                 }
 831
 832                 if ($gnusocial) {
 833                         $server['network'] = NETWORK_OSTATUS;
 834                 }
 835                 if ($diaspora) {
 836                         $server['network'] = NETWORK_DIASPORA;
 837                 }
 838                 if ($friendica) {
 839                         $server['network'] = NETWORK_DFRN;
 840                 }
 841
 842                 if (!$server) {
 843                         return false;
 844                 }
 845
 846                 return $server;
 847         }
 848
 849         /**
 850          * @brief Detect server type (Hubzilla or Friendica) via the front page body
 851          *
 852          * @param string $body Front page of the server
 853          * @return array Server data
 854          */
 855         private static function detectServerType($body)
 856         {
 857                 $server = false;
 858
 859                 $doc = new DOMDocument();
 860                 @$doc->loadHTML($body);
 861                 $xpath = new DOMXPath($doc);
 862
 863                 $list = $xpath->query("//meta[@name]");
 864
 865                 foreach ($list as $node) {
 866                         $attr = [];
 867                         if ($node->attributes->length) {
 868                                 foreach ($node->attributes as $attribute) {
 869                                         $attr[$attribute->name] = $attribute->value;
 870                                 }
 871                         }
 872                         if ($attr['name'] == 'generator') {
 873                                 $version_part = explode(" ", $attr['content']);
 874                                 if (count($version_part) == 2) {
 875                                         if (in_array($version_part[0], ["Friendika", "Friendica"])) {
 876                                                 $server = [];
 877                                                 $server["platform"] = $version_part[0];
 878                                                 $server["version"] = $version_part[1];
 879                                                 $server["network"] = NETWORK_DFRN;
 880                                         }
 881                                 }
 882                         }
 883                 }
 884
 885                 if (!$server) {
 886                         $list = $xpath->query("//meta[@property]");
 887
 888                         foreach ($list as $node) {
 889                                 $attr = [];
 890                                 if ($node->attributes->length) {
 891                                         foreach ($node->attributes as $attribute) {
 892                                                 $attr[$attribute->name] = $attribute->value;
 893                                         }
 894                                 }
 895                                 if ($attr['property'] == 'generator' && in_array($attr['content'], ["hubzilla", "BlaBlaNet"])) {
 896                                         $server = [];
 897                                         $server["platform"] = $attr['content'];
 898                                         $server["version"] = "";
 899                                         $server["network"] = NETWORK_DIASPORA;
 900                                 }
 901                         }
 902                 }
 903
 904                 if (!$server) {
 905                         return false;
 906                 }
 907
 908                 $server["site_name"] = $xpath->evaluate("//head/title/text()")->item(0)->nodeValue;
 909                 return $server;
 910         }
 911
 912         public static function checkServer($server_url, $network = "", $force = false)
 913         {
 914                 // Unify the server address
 915                 $server_url = trim($server_url, "/");
 916                 $server_url = str_replace("/index.php", "", $server_url);
 917
 918                 if ($server_url == "") {
 919                         return false;
 920                 }
 921
 922                 $gserver = dba::selectFirst('gserver', [], ['nurl' => normalise_link($server_url)]);
 923                 if (DBM::is_result($gserver)) {
 924                         if ($gserver["created"] <= NULL_DATE) {
 925                                 $fields = ['created' => Temporal::utcNow()];
 926                                 $condition = ['nurl' => normalise_link($server_url)];
 927                                 dba::update('gserver', $fields, $condition);
 928                         }
 929                         $poco = $gserver["poco"];
 930                         $noscrape = $gserver["noscrape"];
 931
 932                         if ($network == "") {
 933                                 $network = $gserver["network"];
 934                         }
 935
 936                         $last_contact = $gserver["last_contact"];
 937                         $last_failure = $gserver["last_failure"];
 938                         $version = $gserver["version"];
 939                         $platform = $gserver["platform"];
 940                         $site_name = $gserver["site_name"];
 941                         $info = $gserver["info"];
 942                         $register_policy = $gserver["register_policy"];
 943                         $registered_users = $gserver["registered-users"];
 944
 945                         if (!$force && !self::updateNeeded($gserver["created"], "", $last_failure, $last_contact)) {
 946                                 logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 947                                 return ($last_contact >= $last_failure);
 948                         }
 949                 } else {
 950                         $poco = "";
 951                         $noscrape = "";
 952                         $version = "";
 953                         $platform = "";
 954                         $site_name = "";
 955                         $info = "";
 956                         $register_policy = -1;
 957                         $registered_users = 0;
 958
 959                         $last_contact = NULL_DATE;
 960                         $last_failure = NULL_DATE;
 961                 }
 962                 logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$gserver["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 963
 964                 $failure = false;
 965                 $possible_failure = false;
 966                 $orig_last_failure = $last_failure;
 967                 $orig_last_contact = $last_contact;
 968
 969                 // Mastodon uses the "@" for user profiles.
 970                 // But this can be misunderstood.
 971                 if (parse_url($server_url, PHP_URL_USER) != '') {
 972                         dba::update('gserver', ['last_failure' => Temporal::utcNow()], ['nurl' => normalise_link($server_url)]);
 973                         return false;
 974                 }
 975
 976                 // Check if the page is accessible via SSL.
 977                 $orig_server_url = $server_url;
 978                 $server_url = str_replace("http://", "https://", $server_url);
 979
 980                 // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
 981                 $serverret = Network::curl($server_url."/.well-known/host-meta", false, $redirects, ['timeout' => 20]);
 982
 983                 // Quit if there is a timeout.
 984                 // But we want to make sure to only quit if we are mostly sure that this server url fits.
 985                 if (DBM::is_result($gserver) && ($orig_server_url == $server_url) &&
 986                         ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
 987                         logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
 988                         dba::update('gserver', ['last_failure' => Temporal::utcNow()], ['nurl' => normalise_link($server_url)]);
 989                         return false;
 990                 }
 991
 992                 // Maybe the page is unencrypted only?
 993                 $xmlobj = @simplexml_load_string($serverret["body"], 'SimpleXMLElement', 0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
 994                 if (!$serverret["success"] || ($serverret["body"] == "") || (@sizeof($xmlobj) == 0) || !is_object($xmlobj)) {
 995                         $server_url = str_replace("https://", "http://", $server_url);
 996
 997                         // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
 998                         $serverret = Network::curl($server_url."/.well-known/host-meta", false, $redirects, ['timeout' => 20]);
 999
1000                         // Quit if there is a timeout
1001                         if ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1002                                 logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1003                                 dba::update('gserver', ['last_failure' => Temporal::utcNow()], ['nurl' => normalise_link($server_url)]);
1004                                 return false;
1005                         }
1006
1007                         $xmlobj = @simplexml_load_string($serverret["body"], 'SimpleXMLElement', 0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1008                 }
1009
1010                 if (!$serverret["success"] || ($serverret["body"] == "") || (sizeof($xmlobj) == 0) || !is_object($xmlobj)) {
1011                         // Workaround for bad configured servers (known nginx problem)
1012                         if (!in_array($serverret["debug"]["http_code"], ["403", "404"])) {
1013                                 $failure = true;
1014                         }
1015                         $possible_failure = true;
1016                 }
1017
1018                 // If the server has no possible failure we reset the cached data
1019                 if (!$possible_failure) {
1020                         $version = "";
1021                         $platform = "";
1022                         $site_name = "";
1023                         $info = "";
1024                         $register_policy = -1;
1025                 }
1026
1027                 if (!$failure) {
1028                         // This will be too low, but better than no value at all.
1029                         $registered_users = dba::count('gcontact', ['server_url' => normalise_link($server_url)]);
1030                 }
1031
1032                 // Look for poco
1033                 if (!$failure) {
1034                         $serverret = Network::curl($server_url."/poco");
1035                         if ($serverret["success"]) {
1036                                 $data = json_decode($serverret["body"]);
1037                                 if (isset($data->totalResults)) {
1038                                         $registered_users = $data->totalResults;
1039                                         $poco = $server_url."/poco";
1040                                         $server = self::detectPocoData($data);
1041                                         if ($server) {
1042                                                 $platform = $server['platform'];
1043                                                 $network = $server['network'];
1044                                                 $version = '';
1045                                                 $site_name = '';
1046                                         }
1047                                 }
1048                                 // There are servers out there who don't return 404 on a failure
1049                                 // We have to be sure that don't misunderstand this
1050                                 if (is_null($data)) {
1051                                         $poco = "";
1052                                         $noscrape = "";
1053                                         $network = "";
1054                                 }
1055                         }
1056                 }
1057
1058                 if (!$failure) {
1059                         // Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
1060                         $serverret = Network::curl($server_url);
1061
1062                         if (!$serverret["success"] || ($serverret["body"] == "")) {
1063                                 $failure = true;
1064                         } else {
1065                                 $server = self::detectServerType($serverret["body"]);
1066                                 if ($server) {
1067                                         $platform = $server['platform'];
1068                                         $network = $server['network'];
1069                                         $version = $server['version'];
1070                                         $site_name = $server['site_name'];
1071                                 }
1072
1073                                 $lines = explode("\n", $serverret["header"]);
1074                                 if (count($lines)) {
1075                                         foreach ($lines as $line) {
1076                                                 $line = trim($line);
1077                                                 if (stristr($line, 'X-Diaspora-Version:')) {
1078                                                         $platform = "Diaspora";
1079                                                         $version = trim(str_replace("X-Diaspora-Version:", "", $line));
1080                                                         $version = trim(str_replace("x-diaspora-version:", "", $version));
1081                                                         $network = NETWORK_DIASPORA;
1082                                                         $versionparts = explode("-", $version);
1083                                                         $version = $versionparts[0];
1084                                                 }
1085
1086                                                 if (stristr($line, 'Server: Mastodon')) {
1087                                                         $platform = "Mastodon";
1088                                                         $network = NETWORK_OSTATUS;
1089                                                 }
1090                                         }
1091                                 }
1092                         }
1093                 }
1094
1095                 if (!$failure && ($poco == "")) {
1096                         // Test for Statusnet
1097                         // Will also return data for Friendica and GNU Social - but it will be overwritten later
1098                         // The "not implemented" is a special treatment for really, really old Friendica versions
1099                         $serverret = Network::curl($server_url."/api/statusnet/version.json");
1100                         if ($serverret["success"] && ($serverret["body"] != '{"error":"not implemented"}') &&
1101                                 ($serverret["body"] != '') && (strlen($serverret["body"]) < 30)) {
1102                                 $platform = "StatusNet";
1103                                 // Remove junk that some GNU Social servers return
1104                                 $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1105                                 $version = trim($version, '"');
1106                                 $network = NETWORK_OSTATUS;
1107                         }
1108
1109                         // Test for GNU Social
1110                         $serverret = Network::curl($server_url."/api/gnusocial/version.json");
1111                         if ($serverret["success"] && ($serverret["body"] != '{"error":"not implemented"}') &&
1112                                 ($serverret["body"] != '') && (strlen($serverret["body"]) < 30)) {
1113                                 $platform = "GNU Social";
1114                                 // Remove junk that some GNU Social servers return
1115                                 $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1116                                 $version = trim($version, '"');
1117                                 $network = NETWORK_OSTATUS;
1118                         }
1119
1120                         // Test for Mastodon
1121                         $orig_version = $version;
1122                         $serverret = Network::curl($server_url."/api/v1/instance");
1123                         if ($serverret["success"] && ($serverret["body"] != '')) {
1124                                 $data = json_decode($serverret["body"]);
1125
1126                                 if (isset($data->version)) {
1127                                         $platform = "Mastodon";
1128                                         $version = $data->version;
1129                                         $site_name = $data->title;
1130                                         $info = $data->description;
1131                                         $network = NETWORK_OSTATUS;
1132                                 }
1133                                 if (!empty($data->stats->user_count)) {
1134                                         $registered_users = $data->stats->user_count;
1135                                 }
1136                         }
1137                         if (strstr($orig_version.$version, 'Pleroma')) {
1138                                 $platform = 'Pleroma';
1139                                 $version = trim(str_replace('Pleroma', '', $version));
1140                         }
1141                 }
1142
1143                 if (!$failure) {
1144                         // Test for Hubzilla and Red
1145                         $serverret = Network::curl($server_url."/siteinfo.json");
1146                         if ($serverret["success"]) {
1147                                 $data = json_decode($serverret["body"]);
1148                                 if (isset($data->url)) {
1149                                         $platform = $data->platform;
1150                                         $version = $data->version;
1151                                         $network = NETWORK_DIASPORA;
1152                                 }
1153                                 if (!empty($data->site_name)) {
1154                                         $site_name = $data->site_name;
1155                                 }
1156                                 if (!empty($data->channels_total)) {
1157                                         $registered_users = $data->channels_total;
1158                                 }
1159                                 switch ($data->register_policy) {
1160                                         case "REGISTER_OPEN":
1161                                                 $register_policy = REGISTER_OPEN;
1162                                                 break;
1163                                         case "REGISTER_APPROVE":
1164                                                 $register_policy = REGISTER_APPROVE;
1165                                                 break;
1166                                         case "REGISTER_CLOSED":
1167                                         default:
1168                                                 $register_policy = REGISTER_CLOSED;
1169                                                 break;
1170                                 }
1171                         } else {
1172                                 // Test for Hubzilla, Redmatrix or Friendica
1173                                 $serverret = Network::curl($server_url."/api/statusnet/config.json");
1174                                 if ($serverret["success"]) {
1175                                         $data = json_decode($serverret["body"]);
1176                                         if (isset($data->site->server)) {
1177                                                 if (isset($data->site->platform)) {
1178                                                         $platform = $data->site->platform->PLATFORM_NAME;
1179                                                         $version = $data->site->platform->STD_VERSION;
1180                                                         $network = NETWORK_DIASPORA;
1181                                                 }
1182                                                 if (isset($data->site->BlaBlaNet)) {
1183                                                         $platform = $data->site->BlaBlaNet->PLATFORM_NAME;
1184                                                         $version = $data->site->BlaBlaNet->STD_VERSION;
1185                                                         $network = NETWORK_DIASPORA;
1186                                                 }
1187                                                 if (isset($data->site->hubzilla)) {
1188                                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
1189                                                         $version = $data->site->hubzilla->RED_VERSION;
1190                                                         $network = NETWORK_DIASPORA;
1191                                                 }
1192                                                 if (isset($data->site->redmatrix)) {
1193                                                         if (isset($data->site->redmatrix->PLATFORM_NAME)) {
1194                                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
1195                                                         } elseif (isset($data->site->redmatrix->RED_PLATFORM)) {
1196                                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
1197                                                         }
1198
1199                                                         $version = $data->site->redmatrix->RED_VERSION;
1200                                                         $network = NETWORK_DIASPORA;
1201                                                 }
1202                                                 if (isset($data->site->friendica)) {
1203                                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
1204                                                         $version = $data->site->friendica->FRIENDICA_VERSION;
1205                                                         $network = NETWORK_DFRN;
1206                                                 }
1207
1208                                                 $site_name = $data->site->name;
1209
1210                                                 $data->site->closed = self::toBoolean($data->site->closed);
1211                                                 $data->site->private = self::toBoolean($data->site->private);
1212                                                 $data->site->inviteonly = self::toBoolean($data->site->inviteonly);
1213
1214                                                 if (!$data->site->closed && !$data->site->private and $data->site->inviteonly) {
1215                                                         $register_policy = REGISTER_APPROVE;
1216                                                 } elseif (!$data->site->closed && !$data->site->private) {
1217                                                         $register_policy = REGISTER_OPEN;
1218                                                 } else {
1219                                                         $register_policy = REGISTER_CLOSED;
1220                                                 }
1221                                         }
1222                                 }
1223                         }
1224                 }
1225
1226                 // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
1227                 if (!$failure) {
1228                         $serverret = Network::curl($server_url."/statistics.json");
1229                         if ($serverret["success"]) {
1230                                 $data = json_decode($serverret["body"]);
1231
1232                                 if (isset($data->version)) {
1233                                         $version = $data->version;
1234                                         // Version numbers on statistics.json are presented with additional info, e.g.:
1235                                         // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
1236                                         $version = preg_replace("=(.+)-(.{4,})=ism", "$1", $version);
1237                                 }
1238
1239                                 if (!empty($data->name)) {
1240                                         $site_name = $data->name;
1241                                 }
1242
1243                                 if (!empty($data->network)) {
1244                                         $platform = $data->network;
1245                                 }
1246
1247                                 if ($platform == "Diaspora") {
1248                                         $network = NETWORK_DIASPORA;
1249                                 }
1250
1251                                 if ($data->registrations_open) {
1252                                         $register_policy = REGISTER_OPEN;
1253                                 } else {
1254                                         $register_policy = REGISTER_CLOSED;
1255                                 }
1256                         }
1257                 }
1258
1259                 // Query nodeinfo. Working for (at least) Diaspora and Friendica.
1260                 if (!$failure) {
1261                         $server = self::fetchNodeinfo($server_url);
1262                         if ($server) {
1263                                 $register_policy = $server['register_policy'];
1264
1265                                 if (isset($server['platform'])) {
1266                                         $platform = $server['platform'];
1267                                 }
1268
1269                                 if (isset($server['network'])) {
1270                                         $network = $server['network'];
1271                                 }
1272
1273                                 if (isset($server['version'])) {
1274                                         $version = $server['version'];
1275                                 }
1276
1277                                 if (isset($server['site_name'])) {
1278                                         $site_name = $server['site_name'];
1279                                 }
1280
1281                                 if (isset($server['registered-users'])) {
1282                                         $registered_users = $server['registered-users'];
1283                                 }
1284                         }
1285                 }
1286
1287                 // Check for noscrape
1288                 // Friendica servers could be detected as OStatus servers
1289                 if (!$failure && in_array($network, [NETWORK_DFRN, NETWORK_OSTATUS])) {
1290                         $serverret = Network::curl($server_url."/friendica/json");
1291
1292                         if (!$serverret["success"]) {
1293                                 $serverret = Network::curl($server_url."/friendika/json");
1294                         }
1295
1296                         if ($serverret["success"]) {
1297                                 $data = json_decode($serverret["body"]);
1298
1299                                 if (isset($data->version)) {
1300                                         $network = NETWORK_DFRN;
1301
1302                                         $noscrape = $data->no_scrape_url;
1303                                         $version = $data->version;
1304                                         $site_name = $data->site_name;
1305                                         $info = $data->info;
1306                                         $register_policy_str = $data->register_policy;
1307                                         $platform = $data->platform;
1308
1309                                         switch ($register_policy_str) {
1310                                                 case "REGISTER_CLOSED":
1311                                                         $register_policy = REGISTER_CLOSED;
1312                                                         break;
1313                                                 case "REGISTER_APPROVE":
1314                                                         $register_policy = REGISTER_APPROVE;
1315                                                         break;
1316                                                 case "REGISTER_OPEN":
1317                                                         $register_policy = REGISTER_OPEN;
1318                                                         break;
1319                                         }
1320                                 }
1321                         }
1322                 }
1323
1324                 // Every server has got at least an admin account
1325                 if (!$failure && ($registered_users == 0)) {
1326                         $registered_users = 1;
1327                 }
1328
1329                 if ($possible_failure && !$failure) {
1330                         $failure = true;
1331                 }
1332
1333                 if ($failure) {
1334                         $last_contact = $orig_last_contact;
1335                         $last_failure = Temporal::utcNow();
1336                 } else {
1337                         $last_contact = Temporal::utcNow();
1338                         $last_failure = $orig_last_failure;
1339                 }
1340
1341                 if (($last_contact <= $last_failure) && !$failure) {
1342                         logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
1343                 } elseif (($last_contact >= $last_failure) && $failure) {
1344                         logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
1345                 }
1346
1347                 // Check again if the server exists
1348                 $found = dba::exists('gserver', ['nurl' => normalise_link($server_url)]);
1349
1350                 $version = strip_tags($version);
1351                 $site_name = strip_tags($site_name);
1352                 $info = strip_tags($info);
1353                 $platform = strip_tags($platform);
1354
1355                 $fields = ['url' => $server_url, 'version' => $version,
1356                                 'site_name' => $site_name, 'info' => $info, 'register_policy' => $register_policy,
1357                                 'poco' => $poco, 'noscrape' => $noscrape, 'network' => $network,
1358                                 'platform' => $platform, 'registered-users' => $registered_users,
1359                                 'last_contact' => $last_contact, 'last_failure' => $last_failure];
1360
1361                 if ($found) {
1362                         dba::update('gserver', $fields, ['nurl' => normalise_link($server_url)]);
1363                 } elseif (!$failure) {
1364                         $fields['nurl'] = normalise_link($server_url);
1365                         $fields['created'] = Temporal::utcNow();
1366                         dba::insert('gserver', $fields);
1367                 }
1368                 logger("End discovery for server " . $server_url, LOGGER_DEBUG);
1369
1370                 return !$failure;
1371         }
1372
1373         /**
1374          * @brief Returns a list of all known servers
1375          * @return array List of server urls
1376          */
1377         public static function serverlist()
1378         {
1379                 $r = q(
1380                         "SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
1381                         WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
1382                         ORDER BY `last_contact`
1383                         LIMIT 1000",
1384                         dbesc(NETWORK_DFRN),
1385                         dbesc(NETWORK_DIASPORA),
1386                         dbesc(NETWORK_OSTATUS)
1387                 );
1388
1389                 if (!DBM::is_result($r)) {
1390                         return false;
1391                 }
1392
1393                 return $r;
1394         }
1395
1396         /**
1397          * @brief Fetch server list from remote servers and adds them when they are new.
1398          *
1399          * @param string $poco URL to the POCO endpoint
1400          */
1401         private static function fetchServerlist($poco)
1402         {
1403                 $serverret = Network::curl($poco."/@server");
1404                 if (!$serverret["success"]) {
1405                         return;
1406                 }
1407                 $serverlist = json_decode($serverret['body']);
1408
1409                 if (!is_array($serverlist)) {
1410                         return;
1411                 }
1412
1413                 foreach ($serverlist as $server) {
1414                         $server_url = str_replace("/index.php", "", $server->url);
1415
1416                         $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1417                         if (!DBM::is_result($r)) {
1418                                 logger("Call server check for server ".$server_url, LOGGER_DEBUG);
1419                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", $server_url);
1420                         }
1421                 }
1422         }
1423
1424         private static function discoverFederation()
1425         {
1426                 $last = Config::get('poco', 'last_federation_discovery');
1427
1428                 if ($last) {
1429                         $next = $last + (24 * 60 * 60);
1430                         if ($next > time()) {
1431                                 return;
1432                         }
1433                 }
1434
1435                 // Discover Friendica, Hubzilla and Diaspora servers
1436                 $serverdata = Network::fetchUrl("http://the-federation.info/pods.json");
1437
1438                 if ($serverdata) {
1439                         $servers = json_decode($serverdata);
1440
1441                         foreach ($servers->pods as $server) {
1442                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", "https://".$server->host);
1443                         }
1444                 }
1445
1446                 // Disvover Mastodon servers
1447                 if (!Config::get('system', 'ostatus_disabled')) {
1448                         $accesstoken = Config::get('system', 'instances_social_key');
1449                         if (!empty($accesstoken)) {
1450                                 $api = 'https://instances.social/api/1.0/instances/list?count=0';
1451                                 $header = ['Authorization: Bearer '.$accesstoken];
1452                                 $serverdata = Network::curl($api, false, $redirects, ['headers' => $header]);
1453                                 if ($serverdata['success']) {
1454                                         $servers = json_decode($serverdata['body']);
1455                                         foreach ($servers->instances as $server) {
1456                                                 $url = (is_null($server->https_score) ? 'http' : 'https').'://'.$server->name;
1457                                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", $url);
1458                                         }
1459                                 }
1460                         }
1461                 }
1462
1463                 // Currently disabled, since the service isn't available anymore.
1464                 // It is not removed since I hope that there will be a successor.
1465                 // Discover GNU Social Servers.
1466                 //if (!Config::get('system','ostatus_disabled')) {
1467                 //      $serverdata = "http://gstools.org/api/get_open_instances/";
1468
1469                 //      $result = Network::curl($serverdata);
1470                 //      if ($result["success"]) {
1471                 //              $servers = json_decode($result["body"]);
1472
1473                 //              foreach($servers->data as $server)
1474                 //                      self::checkServer($server->instance_address);
1475                 //      }
1476                 //}
1477
1478                 Config::set('poco', 'last_federation_discovery', time());
1479         }
1480
1481         public static function discoverSingleServer($id)
1482         {
1483                 $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `id` = %d", intval($id));
1484                 if (!DBM::is_result($r)) {
1485                         return false;
1486                 }
1487
1488                 $server = $r[0];
1489
1490                 // Discover new servers out there (Works from Friendica version 3.5.2)
1491                 self::fetchServerlist($server["poco"]);
1492
1493                 // Fetch all users from the other server
1494                 $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1495
1496                 logger("Fetch all users from the server ".$server["url"], LOGGER_DEBUG);
1497
1498                 $retdata = Network::curl($url);
1499                 if ($retdata["success"]) {
1500                         $data = json_decode($retdata["body"]);
1501
1502                         self::discoverServer($data, 2);
1503
1504                         if (Config::get('system', 'poco_discovery') > 1) {
1505                                 $timeframe = Config::get('system', 'poco_discovery_since');
1506                                 if ($timeframe == 0) {
1507                                         $timeframe = 30;
1508                                 }
1509
1510                                 $updatedSince = date(Temporal::MYSQL, time() - $timeframe * 86400);
1511
1512                                 // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1513                                 $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1514
1515                                 $success = false;
1516
1517                                 $retdata = Network::curl($url);
1518                                 if ($retdata["success"]) {
1519                                         logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1520                                         $success = self::discoverServer(json_decode($retdata["body"]));
1521                                 }
1522
1523                                 if (!$success && (Config::get('system', 'poco_discovery') > 2)) {
1524                                         logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1525                                         self::discoverServerUsers($data, $server);
1526                                 }
1527                         }
1528
1529                         $fields = ['last_poco_query' => Temporal::utcNow()];
1530                         dba::update('gserver', $fields, ['nurl' => $server["nurl"]]);
1531
1532                         return true;
1533                 } else {
1534                         // If the server hadn't replied correctly, then force a sanity check
1535                         self::checkServer($server["url"], $server["network"], true);
1536
1537                         // If we couldn't reach the server, we will try it some time later
1538                         $fields = ['last_poco_query' => Temporal::utcNow()];
1539                         dba::update('gserver', $fields, ['nurl' => $server["nurl"]]);
1540
1541                         return false;
1542                 }
1543         }
1544
1545         public static function discover($complete = false)
1546         {
1547                 // Update the server list
1548                 self::discoverFederation();
1549
1550                 $no_of_queries = 5;
1551
1552                 $requery_days = intval(Config::get("system", "poco_requery_days"));
1553
1554                 if ($requery_days == 0) {
1555                         $requery_days = 7;
1556                 }
1557                 $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1558
1559                 $r = q("SELECT `id`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1560                 if (DBM::is_result($r)) {
1561                         foreach ($r as $server) {
1562                                 if (!self::checkServer($server["url"], $server["network"])) {
1563                                         // The server is not reachable? Okay, then we will try it later
1564                                         $fields = ['last_poco_query' => Temporal::utcNow()];
1565                                         dba::update('gserver', $fields, ['nurl' => $server["nurl"]]);
1566                                         continue;
1567                                 }
1568
1569                                 logger('Update directory from server '.$server['url'].' with ID '.$server['id'], LOGGER_DEBUG);
1570                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "update_server_directory", (int)$server['id']);
1571
1572                                 if (!$complete && (--$no_of_queries == 0)) {
1573                                         break;
1574                                 }
1575                         }
1576                 }
1577         }
1578
1579         private static function discoverServerUsers($data, $server)
1580         {
1581                 if (!isset($data->entry)) {
1582                         return;
1583                 }
1584
1585                 foreach ($data->entry as $entry) {
1586                         $username = "";
1587                         if (isset($entry->urls)) {
1588                                 foreach ($entry->urls as $url) {
1589                                         if ($url->type == 'profile') {
1590                                                 $profile_url = $url->value;
1591                                                 $urlparts = parse_url($profile_url);
1592                                                 $username = end(explode("/", $urlparts["path"]));
1593                                         }
1594                                 }
1595                         }
1596                         if ($username != "") {
1597                                 logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1598
1599                                 // Fetch all contacts from a given user from the other server
1600                                 $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1601
1602                                 $retdata = Network::curl($url);
1603                                 if ($retdata["success"]) {
1604                                         self::discoverServer(json_decode($retdata["body"]), 3);
1605                                 }
1606                         }
1607                 }
1608         }
1609
1610         private static function discoverServer($data, $default_generation = 0)
1611         {
1612                 if (!isset($data->entry) || !count($data->entry)) {
1613                         return false;
1614                 }
1615
1616                 $success = false;
1617
1618                 foreach ($data->entry as $entry) {
1619                         $profile_url = '';
1620                         $profile_photo = '';
1621                         $connect_url = '';
1622                         $name = '';
1623                         $network = '';
1624                         $updated = NULL_DATE;
1625                         $location = '';
1626                         $about = '';
1627                         $keywords = '';
1628                         $gender = '';
1629                         $contact_type = -1;
1630                         $generation = $default_generation;
1631
1632                         $name = $entry->displayName;
1633
1634                         if (isset($entry->urls)) {
1635                                 foreach ($entry->urls as $url) {
1636                                         if ($url->type == 'profile') {
1637                                                 $profile_url = $url->value;
1638                                                 continue;
1639                                         }
1640                                         if ($url->type == 'webfinger') {
1641                                                 $connect_url = str_replace('acct:' , '', $url->value);
1642                                                 continue;
1643                                         }
1644                                 }
1645                         }
1646
1647                         if (isset($entry->photos)) {
1648                                 foreach ($entry->photos as $photo) {
1649                                         if ($photo->type == 'profile') {
1650                                                 $profile_photo = $photo->value;
1651                                                 continue;
1652                                         }
1653                                 }
1654                         }
1655
1656                         if (isset($entry->updated)) {
1657                                 $updated = date(Temporal::MYSQL, strtotime($entry->updated));
1658                         }
1659
1660                         if (isset($entry->network)) {
1661                                 $network = $entry->network;
1662                         }
1663
1664                         if (isset($entry->currentLocation)) {
1665                                 $location = $entry->currentLocation;
1666                         }
1667
1668                         if (isset($entry->aboutMe)) {
1669                                 $about = html2bbcode($entry->aboutMe);
1670                         }
1671
1672                         if (isset($entry->gender)) {
1673                                 $gender = $entry->gender;
1674                         }
1675
1676                         if (isset($entry->generation) && ($entry->generation > 0)) {
1677                                 $generation = ++$entry->generation;
1678                         }
1679
1680                         if (isset($entry->contactType) && ($entry->contactType >= 0)) {
1681                                 $contact_type = $entry->contactType;
1682                         }
1683
1684                         if (isset($entry->tags)) {
1685                                 foreach ($entry->tags as $tag) {
1686                                         $keywords = implode(", ", $tag);
1687                                 }
1688                         }
1689
1690                         if ($generation > 0) {
1691                                 $success = true;
1692
1693                                 logger("Store profile ".$profile_url, LOGGER_DEBUG);
1694
1695                                 $gcontact = ["url" => $profile_url,
1696                                                 "name" => $name,
1697                                                 "network" => $network,
1698                                                 "photo" => $profile_photo,
1699                                                 "about" => $about,
1700                                                 "location" => $location,
1701                                                 "gender" => $gender,
1702                                                 "keywords" => $keywords,
1703                                                 "connect" => $connect_url,
1704                                                 "updated" => $updated,
1705                                                 "contact-type" => $contact_type,
1706                                                 "generation" => $generation];
1707
1708                                 try {
1709                                         $gcontact = GContact::sanitize($gcontact);
1710                                         GContact::update($gcontact);
1711                                 } catch (Exception $e) {
1712                                         logger($e->getMessage(), LOGGER_DEBUG);
1713                                 }
1714
1715                                 logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1716                         }
1717                 }
1718                 return $success;
1719         }
1720
1721 }