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