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\Content\Text\HTML;
  13 use Friendica\Core\Config;
  14 use Friendica\Core\Worker;
  15 use Friendica\Database\DBM;
  16 use Friendica\Model\GContact;
  17 use Friendica\Model\Profile;
  18 use Friendica\Network\Probe;
  19 use Friendica\Util\DateTimeFormat;
  20 use Friendica\Util\Network;
  21 use Friendica\Protocol\Diaspora;
  22 use Friendica\Util\XML;
  23 use dba;
  24 use DOMDocument;
  25 use DOMXPath;
  26 use Exception;
  27
  28 require_once 'include/dba.php';
  29
  30 class PortableContact
  31 {
  32         /**
  33          * @brief Fetch POCO data
  34          *
  35          * @param integer $cid  Contact ID
  36          * @param integer $uid  User ID
  37          * @param integer $zcid Global Contact ID
  38          * @param integer $url  POCO address that should be polled
  39          *
  40          * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  41          * and add the entries to the gcontact (Global Contact) table, or update existing entries
  42          * if anything (name or photo) has changed.
  43          * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  44          *
  45          * Once the global contact is stored add (if necessary) the contact linkage which associates
  46          * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  47          * pointing to the same global contact id.
  48          *
  49          */
  50         public static function loadWorker($cid, $uid = 0, $zcid = 0, $url = null)
  51         {
  52                 // Call the function "load" via the worker
  53                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "load", (int)$cid, (int)$uid, (int)$zcid, $url);
  54         }
  55
  56         /**
  57          * @brief Fetch POCO data from the worker
  58          *
  59          * @param integer $cid  Contact ID
  60          * @param integer $uid  User ID
  61          * @param integer $zcid Global Contact ID
  62          * @param integer $url  POCO address that should be polled
  63          *
  64          */
  65         public static function load($cid, $uid, $zcid, $url)
  66         {
  67                 $a = get_app();
  68
  69                 if ($cid) {
  70                         if (!$url || !$uid) {
  71                                 $contact = dba::selectFirst('contact', ['poco', 'uid'], ['id' => $cid]);
  72                                 if (DBM::is_result($contact)) {
  73                                         $url = $contact['poco'];
  74                                         $uid = $contact['uid'];
  75                                 }
  76                         }
  77                         if (!$uid) {
  78                                 return;
  79                         }
  80                 }
  81
  82                 if (!$url) {
  83                         return;
  84                 }
  85
  86                 $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') ;
  87
  88                 logger('load: ' . $url, LOGGER_DEBUG);
  89
  90                 $s = Network::fetchUrl($url);
  91
  92                 logger('load: returns ' . $s, LOGGER_DATA);
  93
  94                 logger('load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);
  95
  96                 if (($a->get_curl_code() > 299) || (! $s)) {
  97                         return;
  98                 }
  99
 100                 $j = json_decode($s);
 101
 102                 logger('load: json: ' . print_r($j, true), LOGGER_DATA);
 103
 104                 if (! isset($j->entry)) {
 105                         return;
 106                 }
 107
 108                 $total = 0;
 109                 foreach ($j->entry as $entry) {
 110                         $total ++;
 111                         $profile_url = '';
 112                         $profile_photo = '';
 113                         $connect_url = '';
 114                         $name = '';
 115                         $network = '';
 116                         $updated = NULL_DATE;
 117                         $location = '';
 118                         $about = '';
 119                         $keywords = '';
 120                         $gender = '';
 121                         $contact_type = -1;
 122                         $generation = 0;
 123
 124                         if (!empty($entry->displayName)) {
 125                                 $name = $entry->displayName;
 126                         }
 127
 128                         if (isset($entry->urls)) {
 129                                 foreach ($entry->urls as $url) {
 130                                         if ($url->type == 'profile') {
 131                                                 $profile_url = $url->value;
 132                                                 continue;
 133                                         }
 134                                         if ($url->type == 'webfinger') {
 135                                                 $connect_url = str_replace('acct:', '', $url->value);
 136                                                 continue;
 137                                         }
 138                                 }
 139                         }
 140                         if (isset($entry->photos)) {
 141                                 foreach ($entry->photos as $photo) {
 142                                         if ($photo->type == 'profile') {
 143                                                 $profile_photo = $photo->value;
 144                                                 continue;
 145                                         }
 146                                 }
 147                         }
 148
 149                         if (isset($entry->updated)) {
 150                                 $updated = date(DateTimeFormat::MYSQL, strtotime($entry->updated));
 151                         }
 152
 153                         if (isset($entry->network)) {
 154                                 $network = $entry->network;
 155                         }
 156
 157                         if (isset($entry->currentLocation)) {
 158                                 $location = $entry->currentLocation;
 159                         }
 160
 161                         if (isset($entry->aboutMe)) {
 162                                 $about = HTML::toBBCode($entry->aboutMe);
 163                         }
 164
 165                         if (isset($entry->gender)) {
 166                                 $gender = $entry->gender;
 167                         }
 168
 169                         if (isset($entry->generation) && ($entry->generation > 0)) {
 170                                 $generation = ++$entry->generation;
 171                         }
 172
 173                         if (isset($entry->tags)) {
 174                                 foreach ($entry->tags as $tag) {
 175                                         $keywords = implode(", ", $tag);
 176                                 }
 177                         }
 178
 179                         if (isset($entry->contactType) && ($entry->contactType >= 0)) {
 180                                 $contact_type = $entry->contactType;
 181                         }
 182
 183                         $gcontact = ["url" => $profile_url,
 184                                         "name" => $name,
 185                                         "network" => $network,
 186                                         "photo" => $profile_photo,
 187                                         "about" => $about,
 188                                         "location" => $location,
 189                                         "gender" => $gender,
 190                                         "keywords" => $keywords,
 191                                         "connect" => $connect_url,
 192                                         "updated" => $updated,
 193                                         "contact-type" => $contact_type,
 194                                         "generation" => $generation];
 195
 196                         try {
 197                                 $gcontact = GContact::sanitize($gcontact);
 198                                 $gcid = GContact::update($gcontact);
 199
 200                                 GContact::link($gcid, $uid, $cid, $zcid);
 201                         } catch (Exception $e) {
 202                                 logger($e->getMessage(), LOGGER_DEBUG);
 203                         }
 204                 }
 205                 logger("load: loaded $total entries", LOGGER_DEBUG);
 206
 207                 $condition = ["`cid` = ? AND `uid` = ? AND `zcid` = ? AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY", $cid, $uid, $zcid];
 208                 dba::delete('glink', $condition);
 209         }
 210
 211         public static function reachable($profile, $server = "", $network = "", $force = false)
 212         {
 213                 if ($server == "") {
 214                         $server = self::detectServer($profile);
 215                 }
 216
 217                 if ($server == "") {
 218                         return true;
 219                 }
 220
 221                 return self::checkServer($server, $network, $force);
 222         }
 223
 224         public static function detectServer($profile)
 225         {
 226                 // Try to detect the server path based upon some known standard paths
 227                 $server_url = "";
 228
 229                 if ($server_url == "") {
 230                         $friendica = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $profile);
 231                         if ($friendica != $profile) {
 232                                 $server_url = $friendica;
 233                                 $network = NETWORK_DFRN;
 234                         }
 235                 }
 236
 237                 if ($server_url == "") {
 238                         $diaspora = preg_replace("=(https?://)(.*)/u/(.*)=ism", "$1$2", $profile);
 239                         if ($diaspora != $profile) {
 240                                 $server_url = $diaspora;
 241                                 $network = NETWORK_DIASPORA;
 242                         }
 243                 }
 244
 245                 if ($server_url == "") {
 246                         $red = preg_replace("=(https?://)(.*)/channel/(.*)=ism", "$1$2", $profile);
 247                         if ($red != $profile) {
 248                                 $server_url = $red;
 249                                 $network = NETWORK_DIASPORA;
 250                         }
 251                 }
 252
 253                 // Mastodon
 254                 if ($server_url == "") {
 255                         $mastodon = preg_replace("=(https?://)(.*)/users/(.*)=ism", "$1$2", $profile);
 256                         if ($mastodon != $profile) {
 257                                 $server_url = $mastodon;
 258                                 $network = NETWORK_OSTATUS;
 259                         }
 260                 }
 261
 262                 // Numeric OStatus variant
 263                 if ($server_url == "") {
 264                         $ostatus = preg_replace("=(https?://)(.*)/user/(.*)=ism", "$1$2", $profile);
 265                         if ($ostatus != $profile) {
 266                                 $server_url = $ostatus;
 267                                 $network = NETWORK_OSTATUS;
 268                         }
 269                 }
 270
 271                 // Wild guess
 272                 if ($server_url == "") {
 273                         $base = preg_replace("=(https?://)(.*?)/(.*)=ism", "$1$2", $profile);
 274                         if ($base != $profile) {
 275                                 $server_url = $base;
 276                                 $network = NETWORK_PHANTOM;
 277                         }
 278                 }
 279
 280                 if ($server_url == "") {
 281                         return "";
 282                 }
 283
 284                 $r = q(
 285                         "SELECT `id` FROM `gserver` WHERE `nurl` = '%s' AND `last_contact` > `last_failure`",
 286                         dbesc(normalise_link($server_url))
 287                 );
 288
 289                 if (DBM::is_result($r)) {
 290                         return $server_url;
 291                 }
 292
 293                 // Fetch the host-meta to check if this really is a server
 294                 $serverret = Network::curl($server_url."/.well-known/host-meta");
 295                 if (!$serverret["success"]) {
 296                         return "";
 297                 }
 298
 299                 return $server_url;
 300         }
 301
 302         public static function alternateOStatusUrl($url)
 303         {
 304                 return(preg_match("=https?://.+/user/\d+=ism", $url, $matches));
 305         }
 306
 307         public static function lastUpdated($profile, $force = false)
 308         {
 309                 $gcontacts = q(
 310                         "SELECT * FROM `gcontact` WHERE `nurl` = '%s'",
 311                         dbesc(normalise_link($profile))
 312                 );
 313
 314                 if (!DBM::is_result($gcontacts)) {
 315                         return false;
 316                 }
 317
 318                 $contact = ["url" => $profile];
 319
 320                 if ($gcontacts[0]["created"] <= NULL_DATE) {
 321                         $contact['created'] = DateTimeFormat::utcNow();
 322                 }
 323
 324                 $server_url = '';
 325                 if ($force) {
 326                         $server_url = normalise_link(self::detectServer($profile));
 327                 }
 328
 329                 if (($server_url == '') && ($gcontacts[0]["server_url"] != "")) {
 330                         $server_url = $gcontacts[0]["server_url"];
 331                 }
 332
 333                 if (!$force && (($server_url == '') || ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
 334                         $server_url = normalise_link(self::detectServer($profile));
 335                 }
 336
 337                 if (!in_array($gcontacts[0]["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_FEED, NETWORK_OSTATUS, ""])) {
 338                         logger("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", LOGGER_DEBUG);
 339                         return false;
 340                 }
 341
 342                 if ($server_url != "") {
 343                         if (!self::checkServer($server_url, $gcontacts[0]["network"], $force)) {
 344                                 if ($force) {
 345                                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 346                                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 347                                 }
 348
 349                                 logger("Profile ".$profile.": Server ".$server_url." wasn't reachable.", LOGGER_DEBUG);
 350                                 return false;
 351                         }
 352                         $contact['server_url'] = $server_url;
 353                 }
 354
 355                 if (in_array($gcontacts[0]["network"], ["", NETWORK_FEED])) {
 356                         $server = q(
 357                                 "SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 358                                 dbesc(normalise_link($server_url))
 359                         );
 360
 361                         if ($server) {
 362                                 $contact['network'] = $server[0]["network"];
 363                         } else {
 364                                 return false;
 365                         }
 366                 }
 367
 368                 // noscrape is really fast so we don't cache the call.
 369                 if (($server_url != "") && ($gcontacts[0]["nick"] != "")) {
 370                         //  Use noscrape if possible
 371                         $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($server_url)));
 372
 373                         if ($server) {
 374                                 $noscraperet = Network::curl($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 375
 376                                 if ($noscraperet["success"] && ($noscraperet["body"] != "")) {
 377                                         $noscrape = json_decode($noscraperet["body"], true);
 378
 379                                         if (is_array($noscrape)) {
 380                                                 $contact["network"] = $server[0]["network"];
 381
 382                                                 if (isset($noscrape["fn"])) {
 383                                                         $contact["name"] = $noscrape["fn"];
 384                                                 }
 385                                                 if (isset($noscrape["comm"])) {
 386                                                         $contact["community"] = $noscrape["comm"];
 387                                                 }
 388                                                 if (isset($noscrape["tags"])) {
 389                                                         $keywords = implode(" ", $noscrape["tags"]);
 390                                                         if ($keywords != "") {
 391                                                                 $contact["keywords"] = $keywords;
 392                                                         }
 393                                                 }
 394
 395                                                 $location = Profile::formatLocation($noscrape);
 396                                                 if ($location) {
 397                                                         $contact["location"] = $location;
 398                                                 }
 399                                                 if (isset($noscrape["dfrn-notify"])) {
 400                                                         $contact["notify"] = $noscrape["dfrn-notify"];
 401                                                 }
 402                                                 // Remove all fields that are not present in the gcontact table
 403                                                 unset($noscrape["fn"]);
 404                                                 unset($noscrape["key"]);
 405                                                 unset($noscrape["homepage"]);
 406                                                 unset($noscrape["comm"]);
 407                                                 unset($noscrape["tags"]);
 408                                                 unset($noscrape["locality"]);
 409                                                 unset($noscrape["region"]);
 410                                                 unset($noscrape["country-name"]);
 411                                                 unset($noscrape["contacts"]);
 412                                                 unset($noscrape["dfrn-request"]);
 413                                                 unset($noscrape["dfrn-confirm"]);
 414                                                 unset($noscrape["dfrn-notify"]);
 415                                                 unset($noscrape["dfrn-poll"]);
 416
 417                                                 // Set the date of the last contact
 418                                                 /// @todo By now the function "update_gcontact" doesn't work with this field
 419                                                 //$contact["last_contact"] = DateTimeFormat::utcNow();
 420
 421                                                 $contact = array_merge($contact, $noscrape);
 422
 423                                                 GContact::update($contact);
 424
 425                                                 if (!empty($noscrape["updated"])) {
 426                                                         $fields = ['last_contact' => DateTimeFormat::utcNow()];
 427                                                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 428
 429                                                         logger("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", LOGGER_DEBUG);
 430
 431                                                         return $noscrape["updated"];
 432                                                 }
 433                                         }
 434                                 }
 435                         }
 436                 }
 437
 438                 // If we only can poll the feed, then we only do this once a while
 439                 if (!$force && !self::updateNeeded($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
 440                         logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 441
 442                         GContact::update($contact);
 443                         return $gcontacts[0]["updated"];
 444                 }
 445
 446                 $data = Probe::uri($profile);
 447
 448                 // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 449                 // Then check the other link and delete this one
 450                 if (($data["network"] == NETWORK_OSTATUS) && self::alternateOStatusUrl($profile)
 451                         && (normalise_link($profile) == normalise_link($data["alias"]))
 452                         && (normalise_link($profile) != normalise_link($data["url"]))
 453                 ) {
 454                         // Delete the old entry
 455                         dba::delete('gcontact', ['nurl' => normalise_link($profile)]);
 456
 457                         $gcontact = array_merge($gcontacts[0], $data);
 458
 459                         $gcontact["server_url"] = $data["baseurl"];
 460
 461                         try {
 462                                 $gcontact = GContact::sanitize($gcontact);
 463                                 GContact::update($gcontact);
 464
 465                                 self::lastUpdated($data["url"], $force);
 466                         } catch (Exception $e) {
 467                                 logger($e->getMessage(), LOGGER_DEBUG);
 468                         }
 469
 470                         logger("Profile ".$profile." was deleted", LOGGER_DEBUG);
 471                         return false;
 472                 }
 473
 474                 if (($data["poll"] == "") || (in_array($data["network"], [NETWORK_FEED, NETWORK_PHANTOM]))) {
 475                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 476                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 477
 478                         logger("Profile ".$profile." wasn't reachable (profile)", LOGGER_DEBUG);
 479                         return false;
 480                 }
 481
 482                 $contact = array_merge($contact, $data);
 483
 484                 $contact["server_url"] = $data["baseurl"];
 485
 486                 GContact::update($contact);
 487
 488                 $feedret = Network::curl($data["poll"]);
 489
 490                 if (!$feedret["success"]) {
 491                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 492                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 493
 494                         logger("Profile ".$profile." wasn't reachable (no feed)", LOGGER_DEBUG);
 495                         return false;
 496                 }
 497
 498                 $doc = new DOMDocument();
 499                 @$doc->loadXML($feedret["body"]);
 500
 501                 $xpath = new DOMXPath($doc);
 502                 $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 503
 504                 $entries = $xpath->query('/atom:feed/atom:entry');
 505
 506                 $last_updated = "";
 507
 508                 foreach ($entries as $entry) {
 509                         $published = DateTimeFormat::utc($xpath->query('atom:published/text()', $entry)->item(0)->nodeValue);
 510                         $updated   = DateTimeFormat::utc($xpath->query('atom:updated/text()'  , $entry)->item(0)->nodeValue);
 511
 512                         if ($last_updated < $published) {
 513                                 $last_updated = $published;
 514                         }
 515
 516                         if ($last_updated < $updated) {
 517                                 $last_updated = $updated;
 518                         }
 519                 }
 520
 521                 // Maybe there aren't any entries. Then check if it is a valid feed
 522                 if ($last_updated == "") {
 523                         if ($xpath->query('/atom:feed')->length > 0) {
 524                                 $last_updated = NULL_DATE;
 525                         }
 526                 }
 527
 528                 $fields = ['last_contact' => DateTimeFormat::utcNow()];
 529
 530                 if (!empty($last_updated)) {
 531                         $fields['updated'] = $last_updated;
 532                 }
 533
 534                 dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 535
 536                 if (($gcontacts[0]["generation"] == 0)) {
 537                         $fields = ['generation' => 9];
 538                         dba::update('gcontact', $fields, ['nurl' => normalise_link($profile)]);
 539                 }
 540
 541                 logger("Profile ".$profile." was last updated at ".$last_updated, LOGGER_DEBUG);
 542
 543                 return $last_updated;
 544         }
 545
 546         public static function updateNeeded($created, $updated, $last_failure, $last_contact)
 547         {
 548                 $now = strtotime(DateTimeFormat::utcNow());
 549
 550                 if ($updated > $last_contact) {
 551                         $contact_time = strtotime($updated);
 552                 } else {
 553                         $contact_time = strtotime($last_contact);
 554                 }
 555
 556                 $failure_time = strtotime($last_failure);
 557                 $created_time = strtotime($created);
 558
 559                 // If there is no "created" time then use the current time
 560                 if ($created_time <= 0) {
 561                         $created_time = $now;
 562                 }
 563
 564                 // If the last contact was less than 24 hours then don't update
 565                 if (($now - $contact_time) < (60 * 60 * 24)) {
 566                         return false;
 567                 }
 568
 569                 // If the last failure was less than 24 hours then don't update
 570                 if (($now - $failure_time) < (60 * 60 * 24)) {
 571                         return false;
 572                 }
 573
 574                 // If the last contact was less than a week ago and the last failure is older than a week then don't update
 575                 //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) && ($contact_time > $failure_time))
 576                 //      return false;
 577
 578                 // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 579                 if ((($now - $contact_time) > (60 * 60 * 24 * 7)) && (($now - $created_time) > (60 * 60 * 24 * 7)) && (($now - $failure_time) < (60 * 60 * 24 * 7))) {
 580                         return false;
 581                 }
 582
 583                 // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 584                 if ((($now - $contact_time) > (60 * 60 * 24 * 30)) && (($now - $created_time) > (60 * 60 * 24 * 30)) && (($now - $failure_time) < (60 * 60 * 24 * 30))) {
 585                         return false;
 586                 }
 587
 588                 return true;
 589         }
 590
 591         private static function toBoolean($val)
 592         {
 593                 if (($val == "true") || ($val == 1)) {
 594                         return true;
 595                 } elseif (($val == "false") || ($val == 0)) {
 596                         return false;
 597                 }
 598
 599                 return $val;
 600         }
 601
 602         /**
 603          * @brief Detect server type (Hubzilla or Friendica) via the poco data
 604          *
 605          * @param object $data POCO data
 606          * @return array Server data
 607          */
 608         private static function detectPocoData($data)
 609         {
 610                 $server = false;
 611
 612                 if (!isset($data->entry)) {
 613                         return false;
 614                 }
 615
 616                 if (count($data->entry) == 0) {
 617                         return false;
 618                 }
 619
 620                 if (!isset($data->entry[0]->urls)) {
 621                         return false;
 622                 }
 623
 624                 if (count($data->entry[0]->urls) == 0) {
 625                         return false;
 626                 }
 627
 628                 foreach ($data->entry[0]->urls as $url) {
 629                         if ($url->type == 'zot') {
 630                                 $server = [];
 631                                 $server["platform"] = 'Hubzilla';
 632                                 $server["network"] = NETWORK_DIASPORA;
 633                                 return $server;
 634                         }
 635                 }
 636                 return false;
 637         }
 638
 639         /**
 640          * @brief Detect server type by using the nodeinfo data
 641          *
 642          * @param string $server_url address of the server
 643          * @return array Server data
 644          */
 645         private static function fetchNodeinfo($server_url)
 646         {
 647                 $serverret = Network::curl($server_url."/.well-known/nodeinfo");
 648                 if (!$serverret["success"]) {
 649                         return false;
 650                 }
 651
 652                 $nodeinfo = json_decode($serverret['body']);
 653
 654                 if (!is_object($nodeinfo)) {
 655                         return false;
 656                 }
 657
 658                 if (!is_array($nodeinfo->links)) {
 659                         return false;
 660                 }
 661
 662                 $nodeinfo1_url = '';
 663                 $nodeinfo2_url = '';
 664
 665                 foreach ($nodeinfo->links as $link) {
 666                         if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
 667                                 $nodeinfo1_url = $link->href;
 668                         }
 669                         if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/2.0') {
 670                                 $nodeinfo2_url = $link->href;
 671                         }
 672                 }
 673
 674                 if ($nodeinfo1_url . $nodeinfo2_url == '') {
 675                         return false;
 676                 }
 677
 678                 $server = [];
 679
 680                 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
 681                 if (!empty($nodeinfo2_url) && (parse_url($server_url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) {
 682                         $server = self::parseNodeinfo2($nodeinfo2_url);
 683                 }
 684
 685                 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
 686                 if (empty($server) && !empty($nodeinfo1_url) && (parse_url($server_url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) {
 687                         $server = self::parseNodeinfo1($nodeinfo1_url);
 688                 }
 689
 690                 return $server;
 691         }
 692
 693         /**
 694          * @brief Parses Nodeinfo 1
 695          *
 696          * @param string $nodeinfo_url address of the nodeinfo path
 697          * @return array Server data
 698          */
 699         private static function parseNodeinfo1($nodeinfo_url)
 700         {
 701                 $serverret = Network::curl($nodeinfo_url);
 702                 if (!$serverret["success"]) {
 703                         return false;
 704                 }
 705
 706                 $nodeinfo = json_decode($serverret['body']);
 707                 if (!is_object($nodeinfo)) {
 708                         return false;
 709                 }
 710
 711                 $server = [];
 712
 713                 $server['register_policy'] = REGISTER_CLOSED;
 714
 715                 if (is_bool($nodeinfo->openRegistrations) && $nodeinfo->openRegistrations) {
 716                         $server['register_policy'] = REGISTER_OPEN;
 717                 }
 718
 719                 if (is_object($nodeinfo->software)) {
 720                         if (isset($nodeinfo->software->name)) {
 721                                 $server['platform'] = $nodeinfo->software->name;
 722                         }
 723
 724                         if (isset($nodeinfo->software->version)) {
 725                                 $server['version'] = $nodeinfo->software->version;
 726                                 // Version numbers on Nodeinfo are presented with additional info, e.g.:
 727                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 728                                 $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 729                         }
 730                 }
 731
 732                 if (is_object($nodeinfo->metadata)) {
 733                         if (isset($nodeinfo->metadata->nodeName)) {
 734                                 $server['site_name'] = $nodeinfo->metadata->nodeName;
 735                         }
 736                 }
 737
 738                 if (!empty($nodeinfo->usage->users->total)) {
 739                         $server['registered-users'] = $nodeinfo->usage->users->total;
 740                 }
 741
 742                 $diaspora = false;
 743                 $friendica = false;
 744                 $gnusocial = false;
 745
 746                 if (is_array($nodeinfo->protocols->inbound)) {
 747                         foreach ($nodeinfo->protocols->inbound as $inbound) {
 748                                 if ($inbound == 'diaspora') {
 749                                         $diaspora = true;
 750                                 }
 751                                 if ($inbound == 'friendica') {
 752                                         $friendica = true;
 753                                 }
 754                                 if ($inbound == 'gnusocial') {
 755                                         $gnusocial = true;
 756                                 }
 757                         }
 758                 }
 759
 760                 if ($gnusocial) {
 761                         $server['network'] = NETWORK_OSTATUS;
 762                 }
 763                 if ($diaspora) {
 764                         $server['network'] = NETWORK_DIASPORA;
 765                 }
 766                 if ($friendica) {
 767                         $server['network'] = NETWORK_DFRN;
 768                 }
 769
 770                 if (!$server) {
 771                         return false;
 772                 }
 773
 774                 return $server;
 775         }
 776
 777         /**
 778          * @brief Parses Nodeinfo 2
 779          *
 780          * @param string $nodeinfo_url address of the nodeinfo path
 781          * @return array Server data
 782          */
 783         private static function parseNodeinfo2($nodeinfo_url)
 784         {
 785                 $serverret = Network::curl($nodeinfo_url);
 786                 if (!$serverret["success"]) {
 787                         return false;
 788                 }
 789
 790                 $nodeinfo = json_decode($serverret['body']);
 791                 if (!is_object($nodeinfo)) {
 792                         return false;
 793                 }
 794
 795                 $server = [];
 796
 797                 $server['register_policy'] = REGISTER_CLOSED;
 798
 799                 if (is_bool($nodeinfo->openRegistrations) && $nodeinfo->openRegistrations) {
 800                         $server['register_policy'] = REGISTER_OPEN;
 801                 }
 802
 803                 if (is_object($nodeinfo->software)) {
 804                         if (isset($nodeinfo->software->name)) {
 805                                 $server['platform'] = $nodeinfo->software->name;
 806                         }
 807
 808                         if (isset($nodeinfo->software->version)) {
 809                                 $server['version'] = $nodeinfo->software->version;
 810                                 // Version numbers on Nodeinfo are presented with additional info, e.g.:
 811                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 812                                 $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 813                         }
 814                 }
 815
 816                 if (is_object($nodeinfo->metadata)) {
 817                         if (isset($nodeinfo->metadata->nodeName)) {
 818                                 $server['site_name'] = $nodeinfo->metadata->nodeName;
 819                         }
 820                 }
 821
 822                 if (!empty($nodeinfo->usage->users->total)) {
 823                         $server['registered-users'] = $nodeinfo->usage->users->total;
 824                 }
 825
 826                 $diaspora = false;
 827                 $friendica = false;
 828                 $gnusocial = false;
 829
 830                 if (is_array($nodeinfo->protocols)) {
 831                         foreach ($nodeinfo->protocols as $protocol) {
 832                                 if ($protocol == 'diaspora') {
 833                                         $diaspora = true;
 834                                 }
 835                                 if ($protocol == 'friendica') {
 836                                         $friendica = true;
 837                                 }
 838                                 if ($protocol == 'gnusocial') {
 839                                         $gnusocial = true;
 840                                 }
 841                         }
 842                 }
 843
 844                 if ($gnusocial) {
 845                         $server['network'] = NETWORK_OSTATUS;
 846                 }
 847                 if ($diaspora) {
 848                         $server['network'] = NETWORK_DIASPORA;
 849                 }
 850                 if ($friendica) {
 851                         $server['network'] = NETWORK_DFRN;
 852                 }
 853
 854                 if (!$server) {
 855                         return false;
 856                 }
 857
 858                 return $server;
 859         }
 860
 861         /**
 862          * @brief Detect server type (Hubzilla or Friendica) via the front page body
 863          *
 864          * @param string $body Front page of the server
 865          * @return array Server data
 866          */
 867         private static function detectServerType($body)
 868         {
 869                 $server = false;
 870
 871                 $doc = new DOMDocument();
 872                 @$doc->loadHTML($body);
 873                 $xpath = new DOMXPath($doc);
 874
 875                 $list = $xpath->query("//meta[@name]");
 876
 877                 foreach ($list as $node) {
 878                         $attr = [];
 879                         if ($node->attributes->length) {
 880                                 foreach ($node->attributes as $attribute) {
 881                                         $attr[$attribute->name] = $attribute->value;
 882                                 }
 883                         }
 884                         if ($attr['name'] == 'generator') {
 885                                 $version_part = explode(" ", $attr['content']);
 886                                 if (count($version_part) == 2) {
 887                                         if (in_array($version_part[0], ["Friendika", "Friendica"])) {
 888                                                 $server = [];
 889                                                 $server["platform"] = $version_part[0];
 890                                                 $server["version"] = $version_part[1];
 891                                                 $server["network"] = NETWORK_DFRN;
 892                                         }
 893                                 }
 894                         }
 895                 }
 896
 897                 if (!$server) {
 898                         $list = $xpath->query("//meta[@property]");
 899
 900                         foreach ($list as $node) {
 901                                 $attr = [];
 902                                 if ($node->attributes->length) {
 903                                         foreach ($node->attributes as $attribute) {
 904                                                 $attr[$attribute->name] = $attribute->value;
 905                                         }
 906                                 }
 907                                 if ($attr['property'] == 'generator' && in_array($attr['content'], ["hubzilla", "BlaBlaNet"])) {
 908                                         $server = [];
 909                                         $server["platform"] = $attr['content'];
 910                                         $server["version"] = "";
 911                                         $server["network"] = NETWORK_DIASPORA;
 912                                 }
 913                         }
 914                 }
 915
 916                 if (!$server) {
 917                         return false;
 918                 }
 919
 920                 $server["site_name"] = XML::getFirstNodeValue($xpath, '//head/title/text()');
 921                 return $server;
 922         }
 923
 924         public static function checkServer($server_url, $network = "", $force = false)
 925         {
 926                 // Unify the server address
 927                 $server_url = trim($server_url, "/");
 928                 $server_url = str_replace("/index.php", "", $server_url);
 929
 930                 if ($server_url == "") {
 931                         return false;
 932                 }
 933
 934                 $gserver = dba::selectFirst('gserver', [], ['nurl' => normalise_link($server_url)]);
 935                 if (DBM::is_result($gserver)) {
 936                         if ($gserver["created"] <= NULL_DATE) {
 937                                 $fields = ['created' => DateTimeFormat::utcNow()];
 938                                 $condition = ['nurl' => normalise_link($server_url)];
 939                                 dba::update('gserver', $fields, $condition);
 940                         }
 941                         $poco = $gserver["poco"];
 942                         $noscrape = $gserver["noscrape"];
 943
 944                         if ($network == "") {
 945                                 $network = $gserver["network"];
 946                         }
 947
 948                         $last_contact = $gserver["last_contact"];
 949                         $last_failure = $gserver["last_failure"];
 950                         $version = $gserver["version"];
 951                         $platform = $gserver["platform"];
 952                         $site_name = $gserver["site_name"];
 953                         $info = $gserver["info"];
 954                         $register_policy = $gserver["register_policy"];
 955                         $registered_users = $gserver["registered-users"];
 956
 957                         // See discussion under https://forum.friendi.ca/display/0b6b25a8135aabc37a5a0f5684081633
 958                         // It can happen that a zero date is in the database, but storing it again is forbidden.
 959                         if ($last_contact < NULL_DATE) {
 960                                 $last_contact = NULL_DATE;
 961                         }
 962                         if ($last_failure < NULL_DATE) {
 963                                 $last_failure = NULL_DATE;
 964                         }
 965
 966                         if (!$force && !self::updateNeeded($gserver["created"], "", $last_failure, $last_contact)) {
 967                                 logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 968                                 return ($last_contact >= $last_failure);
 969                         }
 970                 } else {
 971                         $poco = "";
 972                         $noscrape = "";
 973                         $version = "";
 974                         $platform = "";
 975                         $site_name = "";
 976                         $info = "";
 977                         $register_policy = -1;
 978                         $registered_users = 0;
 979
 980                         $last_contact = NULL_DATE;
 981                         $last_failure = NULL_DATE;
 982                 }
 983                 logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$gserver["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 984
 985                 $failure = false;
 986                 $possible_failure = false;
 987                 $orig_last_failure = $last_failure;
 988                 $orig_last_contact = $last_contact;
 989
 990                 // Mastodon uses the "@" for user profiles.
 991                 // But this can be misunderstood.
 992                 if (parse_url($server_url, PHP_URL_USER) != '') {
 993                         dba::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => normalise_link($server_url)]);
 994                         return false;
 995                 }
 996
 997                 // Check if the page is accessible via SSL.
 998                 $orig_server_url = $server_url;
 999                 $server_url = str_replace("http://", "https://", $server_url);
1000
1001                 // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1002                 $serverret = Network::curl($server_url."/.well-known/host-meta", false, $redirects, ['timeout' => 20]);
1003
1004                 // Quit if there is a timeout.
1005                 // But we want to make sure to only quit if we are mostly sure that this server url fits.
1006                 if (DBM::is_result($gserver) && ($orig_server_url == $server_url) &&
1007                         (!$serverret["success"] && ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT))) {
1008                         logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1009                         dba::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => normalise_link($server_url)]);
1010                         return false;
1011                 }
1012
1013                 // Maybe the page is unencrypted only?
1014                 $xmlobj = @simplexml_load_string($serverret["body"], 'SimpleXMLElement', 0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1015                 if (!$serverret["success"] || ($serverret["body"] == "") || empty($xmlobj) || !is_object($xmlobj)) {
1016                         $server_url = str_replace("https://", "http://", $server_url);
1017
1018                         // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1019                         $serverret = Network::curl($server_url."/.well-known/host-meta", false, $redirects, ['timeout' => 20]);
1020
1021                         // Quit if there is a timeout
1022                         if (!$serverret["success"] && ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
1023                                 logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1024                                 dba::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => normalise_link($server_url)]);
1025                                 return false;
1026                         }
1027
1028                         $xmlobj = @simplexml_load_string($serverret["body"], 'SimpleXMLElement', 0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1029                 }
1030
1031                 if (!$serverret["success"] || ($serverret["body"] == "") || empty($xmlobj) || !is_object($xmlobj)) {
1032                         // Workaround for bad configured servers (known nginx problem)
1033                         if (!empty($serverret["debug"]) && !in_array($serverret["debug"]["http_code"], ["403", "404"])) {
1034                                 $failure = true;
1035                         }
1036                         $possible_failure = true;
1037                 }
1038
1039                 // If the server has no possible failure we reset the cached data
1040                 if (!$possible_failure) {
1041                         $version = "";
1042                         $platform = "";
1043                         $site_name = "";
1044                         $info = "";
1045                         $register_policy = -1;
1046                 }
1047
1048                 if (!$failure) {
1049                         // This will be too low, but better than no value at all.
1050                         $registered_users = dba::count('gcontact', ['server_url' => normalise_link($server_url)]);
1051                 }
1052
1053                 // Look for poco
1054                 if (!$failure) {
1055                         $serverret = Network::curl($server_url."/poco");
1056                         if ($serverret["success"]) {
1057                                 $data = json_decode($serverret["body"]);
1058                                 if (isset($data->totalResults)) {
1059                                         $registered_users = $data->totalResults;
1060                                         $poco = $server_url."/poco";
1061                                         $server = self::detectPocoData($data);
1062                                         if ($server) {
1063                                                 $platform = $server['platform'];
1064                                                 $network = $server['network'];
1065                                                 $version = '';
1066                                                 $site_name = '';
1067                                         }
1068                                 }
1069                                 // There are servers out there who don't return 404 on a failure
1070                                 // We have to be sure that don't misunderstand this
1071                                 if (is_null($data)) {
1072                                         $poco = "";
1073                                         $noscrape = "";
1074                                         $network = "";
1075                                 }
1076                         }
1077                 }
1078
1079                 if (!$failure) {
1080                         // Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
1081                         $serverret = Network::curl($server_url);
1082
1083                         if (!$serverret["success"] || ($serverret["body"] == "")) {
1084                                 $failure = true;
1085                         } else {
1086                                 $server = self::detectServerType($serverret["body"]);
1087                                 if ($server) {
1088                                         $platform = $server['platform'];
1089                                         $network = $server['network'];
1090                                         $version = $server['version'];
1091                                         $site_name = $server['site_name'];
1092                                 }
1093
1094                                 $lines = explode("\n", $serverret["header"]);
1095                                 if (count($lines)) {
1096                                         foreach ($lines as $line) {
1097                                                 $line = trim($line);
1098                                                 if (stristr($line, 'X-Diaspora-Version:')) {
1099                                                         $platform = "Diaspora";
1100                                                         $version = trim(str_replace("X-Diaspora-Version:", "", $line));
1101                                                         $version = trim(str_replace("x-diaspora-version:", "", $version));
1102                                                         $network = NETWORK_DIASPORA;
1103                                                         $versionparts = explode("-", $version);
1104                                                         $version = $versionparts[0];
1105                                                 }
1106
1107                                                 if (stristr($line, 'Server: Mastodon')) {
1108                                                         $platform = "Mastodon";
1109                                                         $network = NETWORK_OSTATUS;
1110                                                 }
1111                                         }
1112                                 }
1113                         }
1114                 }
1115
1116                 if (!$failure && ($poco == "")) {
1117                         // Test for Statusnet
1118                         // Will also return data for Friendica and GNU Social - but it will be overwritten later
1119                         // The "not implemented" is a special treatment for really, really old Friendica versions
1120                         $serverret = Network::curl($server_url."/api/statusnet/version.json");
1121                         if ($serverret["success"] && ($serverret["body"] != '{"error":"not implemented"}') &&
1122                                 ($serverret["body"] != '') && (strlen($serverret["body"]) < 30)) {
1123                                 $platform = "StatusNet";
1124                                 // Remove junk that some GNU Social servers return
1125                                 $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1126                                 $version = trim($version, '"');
1127                                 $network = NETWORK_OSTATUS;
1128                         }
1129
1130                         // Test for GNU Social
1131                         $serverret = Network::curl($server_url."/api/gnusocial/version.json");
1132                         if ($serverret["success"] && ($serverret["body"] != '{"error":"not implemented"}') &&
1133                                 ($serverret["body"] != '') && (strlen($serverret["body"]) < 30)) {
1134                                 $platform = "GNU Social";
1135                                 // Remove junk that some GNU Social servers return
1136                                 $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1137                                 $version = trim($version, '"');
1138                                 $network = NETWORK_OSTATUS;
1139                         }
1140
1141                         // Test for Mastodon
1142                         $orig_version = $version;
1143                         $serverret = Network::curl($server_url."/api/v1/instance");
1144                         if ($serverret["success"] && ($serverret["body"] != '')) {
1145                                 $data = json_decode($serverret["body"]);
1146
1147                                 if (isset($data->version)) {
1148                                         $platform = "Mastodon";
1149                                         $version = $data->version;
1150                                         $site_name = $data->title;
1151                                         $info = $data->description;
1152                                         $network = NETWORK_OSTATUS;
1153                                 }
1154                                 if (!empty($data->stats->user_count)) {
1155                                         $registered_users = $data->stats->user_count;
1156                                 }
1157                         }
1158                         if (strstr($orig_version.$version, 'Pleroma')) {
1159                                 $platform = 'Pleroma';
1160                                 $version = trim(str_replace('Pleroma', '', $version));
1161                         }
1162                 }
1163
1164                 if (!$failure) {
1165                         // Test for Hubzilla and Red
1166                         $serverret = Network::curl($server_url."/siteinfo.json");
1167                         if ($serverret["success"]) {
1168                                 $data = json_decode($serverret["body"]);
1169                                 if (isset($data->url)) {
1170                                         $platform = $data->platform;
1171                                         $version = $data->version;
1172                                         $network = NETWORK_DIASPORA;
1173                                 }
1174                                 if (!empty($data->site_name)) {
1175                                         $site_name = $data->site_name;
1176                                 }
1177                                 if (!empty($data->channels_total)) {
1178                                         $registered_users = $data->channels_total;
1179                                 }
1180                                 if (!empty($data->register_policy)) {
1181                                         switch ($data->register_policy) {
1182                                                 case "REGISTER_OPEN":
1183                                                         $register_policy = REGISTER_OPEN;
1184                                                         break;
1185                                                 case "REGISTER_APPROVE":
1186                                                         $register_policy = REGISTER_APPROVE;
1187                                                         break;
1188                                                 case "REGISTER_CLOSED":
1189                                                 default:
1190                                                         $register_policy = REGISTER_CLOSED;
1191                                                         break;
1192                                         }
1193                                 }
1194                         } else {
1195                                 // Test for Hubzilla, Redmatrix or Friendica
1196                                 $serverret = Network::curl($server_url."/api/statusnet/config.json");
1197                                 if ($serverret["success"]) {
1198                                         $data = json_decode($serverret["body"]);
1199                                         if (isset($data->site->server)) {
1200                                                 if (isset($data->site->platform)) {
1201                                                         $platform = $data->site->platform->PLATFORM_NAME;
1202                                                         $version = $data->site->platform->STD_VERSION;
1203                                                         $network = NETWORK_DIASPORA;
1204                                                 }
1205                                                 if (isset($data->site->BlaBlaNet)) {
1206                                                         $platform = $data->site->BlaBlaNet->PLATFORM_NAME;
1207                                                         $version = $data->site->BlaBlaNet->STD_VERSION;
1208                                                         $network = NETWORK_DIASPORA;
1209                                                 }
1210                                                 if (isset($data->site->hubzilla)) {
1211                                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
1212                                                         $version = $data->site->hubzilla->RED_VERSION;
1213                                                         $network = NETWORK_DIASPORA;
1214                                                 }
1215                                                 if (isset($data->site->redmatrix)) {
1216                                                         if (isset($data->site->redmatrix->PLATFORM_NAME)) {
1217                                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
1218                                                         } elseif (isset($data->site->redmatrix->RED_PLATFORM)) {
1219                                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
1220                                                         }
1221
1222                                                         $version = $data->site->redmatrix->RED_VERSION;
1223                                                         $network = NETWORK_DIASPORA;
1224                                                 }
1225                                                 if (isset($data->site->friendica)) {
1226                                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
1227                                                         $version = $data->site->friendica->FRIENDICA_VERSION;
1228                                                         $network = NETWORK_DFRN;
1229                                                 }
1230
1231                                                 $site_name = $data->site->name;
1232
1233                                                 $data->site->closed = self::toBoolean($data->site->closed);
1234
1235                                                 if (!empty($data->site->private)) {
1236                                                         $data->site->private = self::toBoolean($data->site->private);
1237                                                 }
1238
1239                                                 if (!empty($data->site->inviteonly)) {
1240                                                         $data->site->inviteonly = self::toBoolean($data->site->inviteonly);
1241                                                 }
1242
1243                                                 if (!$data->site->closed && !$data->site->private and $data->site->inviteonly) {
1244                                                         $register_policy = REGISTER_APPROVE;
1245                                                 } elseif (!$data->site->closed && !$data->site->private) {
1246                                                         $register_policy = REGISTER_OPEN;
1247                                                 } else {
1248                                                         $register_policy = REGISTER_CLOSED;
1249                                                 }
1250                                         }
1251                                 }
1252                         }
1253                 }
1254
1255                 // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
1256                 if (!$failure) {
1257                         $serverret = Network::curl($server_url."/statistics.json");
1258                         if ($serverret["success"]) {
1259                                 $data = json_decode($serverret["body"]);
1260
1261                                 if (isset($data->version)) {
1262                                         $version = $data->version;
1263                                         // Version numbers on statistics.json are presented with additional info, e.g.:
1264                                         // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
1265                                         $version = preg_replace("=(.+)-(.{4,})=ism", "$1", $version);
1266                                 }
1267
1268                                 if (!empty($data->name)) {
1269                                         $site_name = $data->name;
1270                                 }
1271
1272                                 if (!empty($data->network)) {
1273                                         $platform = $data->network;
1274                                 }
1275
1276                                 if ($platform == "Diaspora") {
1277                                         $network = NETWORK_DIASPORA;
1278                                 }
1279
1280                                 if (!empty($data->registrations_open) && $data->registrations_open) {
1281                                         $register_policy = REGISTER_OPEN;
1282                                 } else {
1283                                         $register_policy = REGISTER_CLOSED;
1284                                 }
1285                         }
1286                 }
1287
1288                 // Query nodeinfo. Working for (at least) Diaspora and Friendica.
1289                 if (!$failure) {
1290                         $server = self::fetchNodeinfo($server_url);
1291                         if ($server) {
1292                                 $register_policy = $server['register_policy'];
1293
1294                                 if (isset($server['platform'])) {
1295                                         $platform = $server['platform'];
1296                                 }
1297
1298                                 if (isset($server['network'])) {
1299                                         $network = $server['network'];
1300                                 }
1301
1302                                 if (isset($server['version'])) {
1303                                         $version = $server['version'];
1304                                 }
1305
1306                                 if (isset($server['site_name'])) {
1307                                         $site_name = $server['site_name'];
1308                                 }
1309
1310                                 if (isset($server['registered-users'])) {
1311                                         $registered_users = $server['registered-users'];
1312                                 }
1313                         }
1314                 }
1315
1316                 // Check for noscrape
1317                 // Friendica servers could be detected as OStatus servers
1318                 if (!$failure && in_array($network, [NETWORK_DFRN, NETWORK_OSTATUS])) {
1319                         $serverret = Network::curl($server_url."/friendica/json");
1320
1321                         if (!$serverret["success"]) {
1322                                 $serverret = Network::curl($server_url."/friendika/json");
1323                         }
1324
1325                         if ($serverret["success"]) {
1326                                 $data = json_decode($serverret["body"]);
1327
1328                                 if (isset($data->version)) {
1329                                         $network = NETWORK_DFRN;
1330
1331                                         if (!empty($data->no_scrape_url)) {
1332                                                 $noscrape = $data->no_scrape_url;
1333                                         }
1334                                         $version = $data->version;
1335                                         if (!empty($data->site_name)) {
1336                                                 $site_name = $data->site_name;
1337                                         }
1338                                         $info = $data->info;
1339                                         $register_policy = constant($data->register_policy);
1340                                         $platform = $data->platform;
1341                                 }
1342                         }
1343                 }
1344
1345                 // Every server has got at least an admin account
1346                 if (!$failure && ($registered_users == 0)) {
1347                         $registered_users = 1;
1348                 }
1349
1350                 if ($possible_failure && !$failure) {
1351                         $failure = true;
1352                 }
1353
1354                 if ($failure) {
1355                         $last_contact = $orig_last_contact;
1356                         $last_failure = DateTimeFormat::utcNow();
1357                 } else {
1358                         $last_contact = DateTimeFormat::utcNow();
1359                         $last_failure = $orig_last_failure;
1360                 }
1361
1362                 if (($last_contact <= $last_failure) && !$failure) {
1363                         logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
1364                 } elseif (($last_contact >= $last_failure) && $failure) {
1365                         logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
1366                 }
1367
1368                 // Check again if the server exists
1369                 $found = dba::exists('gserver', ['nurl' => normalise_link($server_url)]);
1370
1371                 $version = strip_tags($version);
1372                 $site_name = strip_tags($site_name);
1373                 $info = strip_tags($info);
1374                 $platform = strip_tags($platform);
1375
1376                 $fields = ['url' => $server_url, 'version' => $version,
1377                                 'site_name' => $site_name, 'info' => $info, 'register_policy' => $register_policy,
1378                                 'poco' => $poco, 'noscrape' => $noscrape, 'network' => $network,
1379                                 'platform' => $platform, 'registered-users' => $registered_users,
1380                                 'last_contact' => $last_contact, 'last_failure' => $last_failure];
1381
1382                 if ($found) {
1383                         dba::update('gserver', $fields, ['nurl' => normalise_link($server_url)]);
1384                 } elseif (!$failure) {
1385                         $fields['nurl'] = normalise_link($server_url);
1386                         $fields['created'] = DateTimeFormat::utcNow();
1387                         dba::insert('gserver', $fields);
1388                 }
1389
1390                 if (!$failure && in_array($fields['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1391                         self::discoverRelay($server_url);
1392                 }
1393
1394                 logger("End discovery for server " . $server_url, LOGGER_DEBUG);
1395
1396                 return !$failure;
1397         }
1398
1399         /**
1400          * @brief Fetch relay data from a given server url
1401          *
1402          * @param string $server_url address of the server
1403          */
1404         private static function discoverRelay($server_url)
1405         {
1406                 logger("Discover relay data for server " . $server_url, LOGGER_DEBUG);
1407
1408                 $serverret = Network::curl($server_url."/.well-known/x-social-relay");
1409                 if (!$serverret["success"]) {
1410                         return;
1411                 }
1412
1413                 $data = json_decode($serverret['body']);
1414                 if (!is_object($data)) {
1415                         return;
1416                 }
1417
1418                 $gserver = dba::selectFirst('gserver', ['id', 'relay-subscribe', 'relay-scope'], ['nurl' => normalise_link($server_url)]);
1419                 if (!DBM::is_result($gserver)) {
1420                         return;
1421                 }
1422
1423                 if (($gserver['relay-subscribe'] != $data->subscribe) || ($gserver['relay-scope'] != $data->scope)) {
1424                         $fields = ['relay-subscribe' => $data->subscribe, 'relay-scope' => $data->scope];
1425                         dba::update('gserver', $fields, ['id' => $gserver['id']]);
1426                 }
1427
1428                 dba::delete('gserver-tag', ['gserver-id' => $gserver['id']]);
1429                 if ($data->scope == 'tags') {
1430                         // Avoid duplicates
1431                         $tags = [];
1432                         foreach ($data->tags as $tag) {
1433                                 $tag = mb_strtolower($tag);
1434                                 $tags[$tag] = $tag;
1435                         }
1436
1437                         foreach ($tags as $tag) {
1438                                 dba::insert('gserver-tag', ['gserver-id' => $gserver['id'], 'tag' => $tag], true);
1439                         }
1440                 }
1441
1442                 // Create or update the relay contact
1443                 $fields = [];
1444                 if (isset($data->protocols)) {
1445                         if (isset($data->protocols->diaspora)) {
1446                                 $fields['network'] = NETWORK_DIASPORA;
1447                                 if (isset($data->protocols->diaspora->receive)) {
1448                                         $fields['batch'] = $data->protocols->diaspora->receive;
1449                                 } elseif (is_string($data->protocols->diaspora)) {
1450                                         $fields['batch'] = $data->protocols->diaspora;
1451                                 }
1452                         }
1453                         if (isset($data->protocols->dfrn)) {
1454                                 $fields['network'] = NETWORK_DFRN;
1455                                 if (isset($data->protocols->dfrn->receive)) {
1456                                         $fields['batch'] = $data->protocols->dfrn->receive;
1457                                 } elseif (is_string($data->protocols->dfrn)) {
1458                                         $fields['batch'] = $data->protocols->dfrn;
1459                                 }
1460                         }
1461                 }
1462                 Diaspora::setRelayContact($server_url, $fields);
1463         }
1464
1465         /**
1466          * @brief Returns a list of all known servers
1467          * @return array List of server urls
1468          */
1469         public static function serverlist()
1470         {
1471                 $r = q(
1472                         "SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
1473                         WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
1474                         ORDER BY `last_contact`
1475                         LIMIT 1000",
1476                         dbesc(NETWORK_DFRN),
1477                         dbesc(NETWORK_DIASPORA),
1478                         dbesc(NETWORK_OSTATUS)
1479                 );
1480
1481                 if (!DBM::is_result($r)) {
1482                         return false;
1483                 }
1484
1485                 return $r;
1486         }
1487
1488         /**
1489          * @brief Fetch server list from remote servers and adds them when they are new.
1490          *
1491          * @param string $poco URL to the POCO endpoint
1492          */
1493         private static function fetchServerlist($poco)
1494         {
1495                 $serverret = Network::curl($poco."/@server");
1496                 if (!$serverret["success"]) {
1497                         return;
1498                 }
1499                 $serverlist = json_decode($serverret['body']);
1500
1501                 if (!is_array($serverlist)) {
1502                         return;
1503                 }
1504
1505                 foreach ($serverlist as $server) {
1506                         $server_url = str_replace("/index.php", "", $server->url);
1507
1508                         $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1509                         if (!DBM::is_result($r)) {
1510                                 logger("Call server check for server ".$server_url, LOGGER_DEBUG);
1511                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", $server_url);
1512                         }
1513                 }
1514         }
1515
1516         private static function discoverFederation()
1517         {
1518                 $last = Config::get('poco', 'last_federation_discovery');
1519
1520                 if ($last) {
1521                         $next = $last + (24 * 60 * 60);
1522                         if ($next > time()) {
1523                                 return;
1524                         }
1525                 }
1526
1527                 // Discover Friendica, Hubzilla and Diaspora servers
1528                 $serverdata = Network::fetchUrl("http://the-federation.info/pods.json");
1529
1530                 if ($serverdata) {
1531                         $servers = json_decode($serverdata);
1532
1533                         if (!empty($servers->pods)) {
1534                                 foreach ($servers->pods as $server) {
1535                                         Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", "https://".$server->host);
1536                                 }
1537                         }
1538                 }
1539
1540                 // Disvover Mastodon servers
1541                 if (!Config::get('system', 'ostatus_disabled')) {
1542                         $accesstoken = Config::get('system', 'instances_social_key');
1543                         if (!empty($accesstoken)) {
1544                                 $api = 'https://instances.social/api/1.0/instances/list?count=0';
1545                                 $header = ['Authorization: Bearer '.$accesstoken];
1546                                 $serverdata = Network::curl($api, false, $redirects, ['headers' => $header]);
1547                                 if ($serverdata['success']) {
1548                                         $servers = json_decode($serverdata['body']);
1549                                         foreach ($servers->instances as $server) {
1550                                                 $url = (is_null($server->https_score) ? 'http' : 'https').'://'.$server->name;
1551                                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "server", $url);
1552                                         }
1553                                 }
1554                         }
1555                 }
1556
1557                 // Currently disabled, since the service isn't available anymore.
1558                 // It is not removed since I hope that there will be a successor.
1559                 // Discover GNU Social Servers.
1560                 //if (!Config::get('system','ostatus_disabled')) {
1561                 //      $serverdata = "http://gstools.org/api/get_open_instances/";
1562
1563                 //      $result = Network::curl($serverdata);
1564                 //      if ($result["success"]) {
1565                 //              $servers = json_decode($result["body"]);
1566
1567                 //              foreach($servers->data as $server)
1568                 //                      self::checkServer($server->instance_address);
1569                 //      }
1570                 //}
1571
1572                 Config::set('poco', 'last_federation_discovery', time());
1573         }
1574
1575         public static function discoverSingleServer($id)
1576         {
1577                 $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `id` = %d", intval($id));
1578                 if (!DBM::is_result($r)) {
1579                         return false;
1580                 }
1581
1582                 $server = $r[0];
1583
1584                 // Discover new servers out there (Works from Friendica version 3.5.2)
1585                 self::fetchServerlist($server["poco"]);
1586
1587                 // Fetch all users from the other server
1588                 $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1589
1590                 logger("Fetch all users from the server ".$server["url"], LOGGER_DEBUG);
1591
1592                 $retdata = Network::curl($url);
1593                 if ($retdata["success"]) {
1594                         $data = json_decode($retdata["body"]);
1595
1596                         self::discoverServer($data, 2);
1597
1598                         if (Config::get('system', 'poco_discovery') > 1) {
1599                                 $timeframe = Config::get('system', 'poco_discovery_since');
1600                                 if ($timeframe == 0) {
1601                                         $timeframe = 30;
1602                                 }
1603
1604                                 $updatedSince = date(DateTimeFormat::MYSQL, time() - $timeframe * 86400);
1605
1606                                 // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1607                                 $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1608
1609                                 $success = false;
1610
1611                                 $retdata = Network::curl($url);
1612                                 if ($retdata["success"]) {
1613                                         logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1614                                         $success = self::discoverServer(json_decode($retdata["body"]));
1615                                 }
1616
1617                                 if (!$success && (Config::get('system', 'poco_discovery') > 2)) {
1618                                         logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1619                                         self::discoverServerUsers($data, $server);
1620                                 }
1621                         }
1622
1623                         $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1624                         dba::update('gserver', $fields, ['nurl' => $server["nurl"]]);
1625
1626                         return true;
1627                 } else {
1628                         // If the server hadn't replied correctly, then force a sanity check
1629                         self::checkServer($server["url"], $server["network"], true);
1630
1631                         // If we couldn't reach the server, we will try it some time later
1632                         $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1633                         dba::update('gserver', $fields, ['nurl' => $server["nurl"]]);
1634
1635                         return false;
1636                 }
1637         }
1638
1639         public static function discover($complete = false)
1640         {
1641                 // Update the server list
1642                 self::discoverFederation();
1643
1644                 $no_of_queries = 5;
1645
1646                 $requery_days = intval(Config::get("system", "poco_requery_days"));
1647
1648                 if ($requery_days == 0) {
1649                         $requery_days = 7;
1650                 }
1651                 $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1652
1653                 $r = q("SELECT `id`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1654                 if (DBM::is_result($r)) {
1655                         foreach ($r as $server) {
1656                                 if (!self::checkServer($server["url"], $server["network"])) {
1657                                         // The server is not reachable? Okay, then we will try it later
1658                                         $fields = ['last_poco_query' => DateTimeFormat::utcNow()];
1659                                         dba::update('gserver', $fields, ['nurl' => $server["nurl"]]);
1660                                         continue;
1661                                 }
1662
1663                                 logger('Update directory from server '.$server['url'].' with ID '.$server['id'], LOGGER_DEBUG);
1664                                 Worker::add(PRIORITY_LOW, "DiscoverPoCo", "update_server_directory", (int)$server['id']);
1665
1666                                 if (!$complete && (--$no_of_queries == 0)) {
1667                                         break;
1668                                 }
1669                         }
1670                 }
1671         }
1672
1673         private static function discoverServerUsers($data, $server)
1674         {
1675                 if (!isset($data->entry)) {
1676                         return;
1677                 }
1678
1679                 foreach ($data->entry as $entry) {
1680                         $username = "";
1681                         if (isset($entry->urls)) {
1682                                 foreach ($entry->urls as $url) {
1683                                         if ($url->type == 'profile') {
1684                                                 $profile_url = $url->value;
1685                                                 $urlparts = parse_url($profile_url);
1686                                                 $username = end(explode("/", $urlparts["path"]));
1687                                         }
1688                                 }
1689                         }
1690                         if ($username != "") {
1691                                 logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1692
1693                                 // Fetch all contacts from a given user from the other server
1694                                 $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1695
1696                                 $retdata = Network::curl($url);
1697                                 if ($retdata["success"]) {
1698                                         self::discoverServer(json_decode($retdata["body"]), 3);
1699                                 }
1700                         }
1701                 }
1702         }
1703
1704         private static function discoverServer($data, $default_generation = 0)
1705         {
1706                 if (!isset($data->entry) || !count($data->entry)) {
1707                         return false;
1708                 }
1709
1710                 $success = false;
1711
1712                 foreach ($data->entry as $entry) {
1713                         $profile_url = '';
1714                         $profile_photo = '';
1715                         $connect_url = '';
1716                         $name = '';
1717                         $network = '';
1718                         $updated = NULL_DATE;
1719                         $location = '';
1720                         $about = '';
1721                         $keywords = '';
1722                         $gender = '';
1723                         $contact_type = -1;
1724                         $generation = $default_generation;
1725
1726                         if (!empty($entry->displayName)) {
1727                                 $name = $entry->displayName;
1728                         }
1729
1730                         if (isset($entry->urls)) {
1731                                 foreach ($entry->urls as $url) {
1732                                         if ($url->type == 'profile') {
1733                                                 $profile_url = $url->value;
1734                                                 continue;
1735                                         }
1736                                         if ($url->type == 'webfinger') {
1737                                                 $connect_url = str_replace('acct:' , '', $url->value);
1738                                                 continue;
1739                                         }
1740                                 }
1741                         }
1742
1743                         if (isset($entry->photos)) {
1744                                 foreach ($entry->photos as $photo) {
1745                                         if ($photo->type == 'profile') {
1746                                                 $profile_photo = $photo->value;
1747                                                 continue;
1748                                         }
1749                                 }
1750                         }
1751
1752                         if (isset($entry->updated)) {
1753                                 $updated = date(DateTimeFormat::MYSQL, strtotime($entry->updated));
1754                         }
1755
1756                         if (isset($entry->network)) {
1757                                 $network = $entry->network;
1758                         }
1759
1760                         if (isset($entry->currentLocation)) {
1761                                 $location = $entry->currentLocation;
1762                         }
1763
1764                         if (isset($entry->aboutMe)) {
1765                                 $about = HTML::toBBCode($entry->aboutMe);
1766                         }
1767
1768                         if (isset($entry->gender)) {
1769                                 $gender = $entry->gender;
1770                         }
1771
1772                         if (isset($entry->generation) && ($entry->generation > 0)) {
1773                                 $generation = ++$entry->generation;
1774                         }
1775
1776                         if (isset($entry->contactType) && ($entry->contactType >= 0)) {
1777                                 $contact_type = $entry->contactType;
1778                         }
1779
1780                         if (isset($entry->tags)) {
1781                                 foreach ($entry->tags as $tag) {
1782                                         $keywords = implode(", ", $tag);
1783                                 }
1784                         }
1785
1786                         if ($generation > 0) {
1787                                 $success = true;
1788
1789                                 logger("Store profile ".$profile_url, LOGGER_DEBUG);
1790
1791                                 $gcontact = ["url" => $profile_url,
1792                                                 "name" => $name,
1793                                                 "network" => $network,
1794                                                 "photo" => $profile_photo,
1795                                                 "about" => $about,
1796                                                 "location" => $location,
1797                                                 "gender" => $gender,
1798                                                 "keywords" => $keywords,
1799                                                 "connect" => $connect_url,
1800                                                 "updated" => $updated,
1801                                                 "contact-type" => $contact_type,
1802                                                 "generation" => $generation];
1803
1804                                 try {
1805                                         $gcontact = GContact::sanitize($gcontact);
1806                                         GContact::update($gcontact);
1807                                 } catch (Exception $e) {
1808                                         logger($e->getMessage(), LOGGER_DEBUG);
1809                                 }
1810
1811                                 logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1812                         }
1813                 }
1814                 return $success;
1815         }
1816
1817 }