include/socgraph.php

   1 <?php
   2 /**
   3  * @file include/socgraph.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 use \Friendica\Core\Config;
  11
  12 require_once('include/datetime.php');
  13 require_once("include/Scrape.php");
  14 require_once("include/network.php");
  15 require_once("include/html2bbcode.php");
  16 require_once("include/Contact.php");
  17 require_once("include/Photo.php");
  18
  19 /**
  20  * @brief Fetch POCO data
  21  *
  22  * @param integer $cid Contact ID
  23  * @param integer $uid User ID
  24  * @param integer $zcid Global Contact ID
  25  * @param integer $url POCO address that should be polled
  26  *
  27  * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  28  * and add the entries to the gcontact (Global Contact) table, or update existing entries
  29  * if anything (name or photo) has changed.
  30  * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  31  *
  32  * Once the global contact is stored add (if necessary) the contact linkage which associates
  33  * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  34  * pointing to the same global contact id.
  35  *
  36  */
  37 function poco_load($cid, $uid = 0, $zcid = 0, $url = null) {
  38         // Call the function "poco_load_worker" via the worker
  39         proc_run(PRIORITY_LOW, "include/discover_poco.php", "poco_load", intval($cid), intval($uid), intval($zcid), base64_encode($url));
  40 }
  41
  42 /**
  43  * @brief Fetch POCO data from the worker
  44  *
  45  * @param integer $cid Contact ID
  46  * @param integer $uid User ID
  47  * @param integer $zcid Global Contact ID
  48  * @param integer $url POCO address that should be polled
  49  *
  50  */
  51 function poco_load_worker($cid, $uid, $zcid, $url) {
  52         $a = get_app();
  53
  54         if($cid) {
  55                 if((! $url) || (! $uid)) {
  56                         $r = q("select `poco`, `uid` from `contact` where `id` = %d limit 1",
  57                                 intval($cid)
  58                         );
  59                         if (dbm::is_result($r)) {
  60                                 $url = $r[0]['poco'];
  61                                 $uid = $r[0]['uid'];
  62                         }
  63                 }
  64                 if(! $uid)
  65                         return;
  66         }
  67
  68         if(! $url)
  69                 return;
  70
  71         $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') ;
  72
  73         logger('poco_load: ' . $url, LOGGER_DEBUG);
  74
  75         $s = fetch_url($url);
  76
  77         logger('poco_load: returns ' . $s, LOGGER_DATA);
  78
  79         logger('poco_load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);
  80
  81         if(($a->get_curl_code() > 299) || (! $s))
  82                 return;
  83
  84         $j = json_decode($s);
  85
  86         logger('poco_load: json: ' . print_r($j,true),LOGGER_DATA);
  87
  88         if(! isset($j->entry))
  89                 return;
  90
  91         $total = 0;
  92         foreach($j->entry as $entry) {
  93
  94                 $total ++;
  95                 $profile_url = '';
  96                 $profile_photo = '';
  97                 $connect_url = '';
  98                 $name = '';
  99                 $network = '';
 100                 $updated = NULL_DATE;
 101                 $location = '';
 102                 $about = '';
 103                 $keywords = '';
 104                 $gender = '';
 105                 $contact_type = -1;
 106                 $generation = 0;
 107
 108                 $name = $entry->displayName;
 109
 110                 if (isset($entry->urls)) {
 111                         foreach ($entry->urls as $url) {
 112                                 if ($url->type == 'profile') {
 113                                         $profile_url = $url->value;
 114                                         continue;
 115                                 }
 116                                 if ($url->type == 'webfinger') {
 117                                         $connect_url = str_replace('acct:' , '', $url->value);
 118                                         continue;
 119                                 }
 120                         }
 121                 }
 122                 if (isset($entry->photos)) {
 123                         foreach ($entry->photos as $photo) {
 124                                 if ($photo->type == 'profile') {
 125                                         $profile_photo = $photo->value;
 126                                         continue;
 127                                 }
 128                         }
 129                 }
 130
 131                 if (isset($entry->updated)) {
 132                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
 133                 }
 134
 135                 if (isset($entry->network)) {
 136                         $network = $entry->network;
 137                 }
 138
 139                 if (isset($entry->currentLocation)) {
 140                         $location = $entry->currentLocation;
 141                 }
 142
 143                 if (isset($entry->aboutMe)) {
 144                         $about = html2bbcode($entry->aboutMe);
 145                 }
 146
 147                 if (isset($entry->gender)) {
 148                         $gender = $entry->gender;
 149                 }
 150
 151                 if (isset($entry->generation) AND ($entry->generation > 0)) {
 152                         $generation = ++$entry->generation;
 153                 }
 154
 155                 if (isset($entry->tags)) {
 156                         foreach($entry->tags as $tag) {
 157                                 $keywords = implode(", ", $tag);
 158                         }
 159                 }
 160
 161                 if (isset($entry->contactType) AND ($entry->contactType >= 0))
 162                         $contact_type = $entry->contactType;
 163
 164                 $gcontact = array("url" => $profile_url,
 165                                 "name" => $name,
 166                                 "network" => $network,
 167                                 "photo" => $profile_photo,
 168                                 "about" => $about,
 169                                 "location" => $location,
 170                                 "gender" => $gender,
 171                                 "keywords" => $keywords,
 172                                 "connect" => $connect_url,
 173                                 "updated" => $updated,
 174                                 "contact-type" => $contact_type,
 175                                 "generation" => $generation);
 176
 177                 try {
 178                         $gcontact = sanitize_gcontact($gcontact);
 179                         $gcid = update_gcontact($gcontact);
 180
 181                         link_gcontact($gcid, $uid, $cid, $zcid);
 182                 } catch (Exception $e) {
 183                         logger($e->getMessage(), LOGGER_DEBUG);
 184                 }
 185         }
 186         logger("poco_load: loaded $total entries",LOGGER_DEBUG);
 187
 188         q("DELETE FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `zcid` = %d AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY",
 189                 intval($cid),
 190                 intval($uid),
 191                 intval($zcid)
 192         );
 193
 194 }
 195 /**
 196  * @brief Sanitize the given gcontact data
 197  *
 198  * @param array $gcontact array with gcontact data
 199  * @throw Exception
 200  *
 201  * Generation:
 202  *  0: No definition
 203  *  1: Profiles on this server
 204  *  2: Contacts of profiles on this server
 205  *  3: Contacts of contacts of profiles on this server
 206  *  4: ...
 207  *
 208  */
 209 function sanitize_gcontact($gcontact) {
 210
 211         if ($gcontact['url'] == "") {
 212                 throw new Exception('URL is empty');
 213         }
 214
 215         $urlparts = parse_url($gcontact['url']);
 216         if (!isset($urlparts["scheme"])) {
 217                 throw new Exception("This (".$gcontact['url'].") doesn't seem to be an url.");
 218         }
 219
 220         if (in_array($urlparts["host"], array("www.facebook.com", "facebook.com", "twitter.com",
 221                                                 "identi.ca", "alpha.app.net"))) {
 222                 throw new Exception('Contact from a non federated network ignored. ('.$gcontact['url'].')');
 223         }
 224
 225         // Don't store the statusnet connector as network
 226         // We can't simply set this to NETWORK_OSTATUS since the connector could have fetched posts from friendica as well
 227         if ($gcontact['network'] == NETWORK_STATUSNET) {
 228                 $gcontact['network'] = "";
 229         }
 230
 231         // Assure that there are no parameter fragments in the profile url
 232         if (in_array($gcontact['network'], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
 233                 $gcontact['url'] = clean_contact_url($gcontact['url']);
 234         }
 235
 236         $alternate = poco_alternate_ostatus_url($gcontact['url']);
 237
 238         // The global contacts should contain the original picture, not the cached one
 239         if (($gcontact['generation'] != 1) AND stristr(normalise_link($gcontact['photo']), normalise_link(App::get_baseurl()."/photo/"))) {
 240                 $gcontact['photo'] = "";
 241         }
 242
 243         if (!isset($gcontact['network'])) {
 244                 $r = q("SELECT `network` FROM `contact` WHERE `uid` = 0 AND `nurl` = '%s' AND `network` != '' AND `network` != '%s' LIMIT 1",
 245                         dbesc(normalise_link($gcontact['url'])), dbesc(NETWORK_STATUSNET)
 246                 );
 247                 if (dbm::is_result($r)) {
 248                         $gcontact['network'] = $r[0]["network"];
 249                 }
 250
 251                 if (($gcontact['network'] == "") OR ($gcontact['network'] == NETWORK_OSTATUS)) {
 252                         $r = q("SELECT `network`, `url` FROM `contact` WHERE `uid` = 0 AND `alias` IN ('%s', '%s') AND `network` != '' AND `network` != '%s' LIMIT 1",
 253                                 dbesc($gcontact['url']), dbesc(normalise_link($gcontact['url'])), dbesc(NETWORK_STATUSNET)
 254                         );
 255                         if (dbm::is_result($r)) {
 256                                 $gcontact['network'] = $r[0]["network"];
 257                         }
 258                 }
 259         }
 260
 261         $gcontact['server_url'] = '';
 262         $gcontact['network'] = '';
 263
 264         $x = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
 265                 dbesc(normalise_link($gcontact['url']))
 266         );
 267
 268         if (count($x)) {
 269                 if (!isset($gcontact['network']) AND ($x[0]["network"] != NETWORK_STATUSNET)) {
 270                         $gcontact['network'] = $x[0]["network"];
 271                 }
 272                 if ($gcontact['updated'] <= NULL_DATE) {
 273                         $gcontact['updated'] = $x[0]["updated"];
 274                 }
 275                 if (!isset($gcontact['server_url']) AND (normalise_link($x[0]["server_url"]) != normalise_link($x[0]["url"]))) {
 276                         $gcontact['server_url'] = $x[0]["server_url"];
 277                 }
 278                 if (!isset($gcontact['addr'])) {
 279                         $gcontact['addr'] = $x[0]["addr"];
 280                 }
 281         }
 282
 283         if ((!isset($gcontact['network']) OR !isset($gcontact['name']) OR !isset($gcontact['addr']) OR !isset($gcontact['photo']) OR !isset($gcontact['server_url']) OR $alternate)
 284                 AND poco_reachable($gcontact['url'], $gcontact['server_url'], $gcontact['network'], false)) {
 285                 $data = Probe::uri($gcontact['url']);
 286
 287                 if ($data["network"] == NETWORK_PHANTOM) {
 288                         throw new Exception('Probing for URL '.$gcontact['url'].' failed');
 289                 }
 290
 291                 $orig_profile = $gcontact['url'];
 292
 293                 $gcontact["server_url"] = $data["baseurl"];
 294
 295                 $gcontact = array_merge($gcontact, $data);
 296
 297                 if ($alternate AND ($gcontact['network'] == NETWORK_OSTATUS)) {
 298                         // Delete the old entry - if it exists
 299                         $r = q("SELECT `id` FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 300                         if ($r) {
 301                                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 302                                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($r[0]["id"]));
 303                         }
 304                 }
 305         }
 306
 307         if (!isset($gcontact['name']) OR !isset($gcontact['photo'])) {
 308                 throw new Exception('No name and photo for URL '.$gcontact['url']);
 309         }
 310
 311         if (!in_array($gcontact['network'], array(NETWORK_DFRN, NETWORK_OSTATUS, NETWORK_DIASPORA))) {
 312                 throw new Exception('No federated network ('.$gcontact['network'].') detected for URL '.$gcontact['url']);
 313         }
 314
 315         if (!isset($gcontact['server_url'])) {
 316                 // We check the server url to be sure that it is a real one
 317                 $server_url = poco_detect_server($gcontact['url']);
 318
 319                 // We are now sure that it is a correct URL. So we use it in the future
 320                 if ($server_url != "") {
 321                         $gcontact['server_url'] = $server_url;
 322                 }
 323         }
 324
 325         // The server URL doesn't seem to be valid, so we don't store it.
 326         if (!poco_check_server($gcontact['server_url'], $gcontact['network'])) {
 327                 $gcontact['server_url'] = "";
 328         }
 329
 330         return $gcontact;
 331 }
 332
 333 /**
 334  * @brief Link the gcontact entry with user, contact and global contact
 335  *
 336  * @param integer $gcid Global contact ID
 337  * @param integer $cid Contact ID
 338  * @param integer $uid User ID
 339  * @param integer $zcid Global Contact ID
 340  * *
 341  */
 342 function link_gcontact($gcid, $uid = 0, $cid = 0, $zcid = 0) {
 343
 344         if ($gcid <= 0) {
 345                 return;
 346         }
 347
 348         $r = q("SELECT * FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d LIMIT 1",
 349                 intval($cid),
 350                 intval($uid),
 351                 intval($gcid),
 352                 intval($zcid)
 353         );
 354         if (!dbm::is_result($r)) {
 355                 q("INSERT INTO `glink` (`cid`, `uid`, `gcid`, `zcid`, `updated`) VALUES (%d, %d, %d, %d, '%s') ",
 356                         intval($cid),
 357                         intval($uid),
 358                         intval($gcid),
 359                         intval($zcid),
 360                         dbesc(datetime_convert())
 361                 );
 362         } else {
 363                 q("UPDATE `glink` SET `updated` = '%s' WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d",
 364                         dbesc(datetime_convert()),
 365                         intval($cid),
 366                         intval($uid),
 367                         intval($gcid),
 368                         intval($zcid)
 369                 );
 370         }
 371 }
 372
 373 function poco_reachable($profile, $server = "", $network = "", $force = false) {
 374
 375         if ($server == "")
 376                 $server = poco_detect_server($profile);
 377
 378         if ($server == "")
 379                 return true;
 380
 381         return poco_check_server($server, $network, $force);
 382 }
 383
 384 function poco_detect_server($profile) {
 385
 386         // Try to detect the server path based upon some known standard paths
 387         $server_url = "";
 388
 389         if ($server_url == "") {
 390                 $friendica = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $profile);
 391                 if ($friendica != $profile) {
 392                         $server_url = $friendica;
 393                         $network = NETWORK_DFRN;
 394                 }
 395         }
 396
 397         if ($server_url == "") {
 398                 $diaspora = preg_replace("=(https?://)(.*)/u/(.*)=ism", "$1$2", $profile);
 399                 if ($diaspora != $profile) {
 400                         $server_url = $diaspora;
 401                         $network = NETWORK_DIASPORA;
 402                 }
 403         }
 404
 405         if ($server_url == "") {
 406                 $red = preg_replace("=(https?://)(.*)/channel/(.*)=ism", "$1$2", $profile);
 407                 if ($red != $profile) {
 408                         $server_url = $red;
 409                         $network = NETWORK_DIASPORA;
 410                 }
 411         }
 412
 413         // Mastodon
 414         if ($server_url == "") {
 415                 $mastodon = preg_replace("=(https?://)(.*)/users/(.*)=ism", "$1$2", $profile);
 416                 if ($mastodon != $profile) {
 417                         $server_url = $mastodon;
 418                         $network = NETWORK_OSTATUS;
 419                 }
 420         }
 421
 422         // Numeric OStatus variant
 423         if ($server_url == "") {
 424                 $ostatus = preg_replace("=(https?://)(.*)/user/(.*)=ism", "$1$2", $profile);
 425                 if ($ostatus != $profile) {
 426                         $server_url = $ostatus;
 427                         $network = NETWORK_OSTATUS;
 428                 }
 429         }
 430
 431         // Wild guess
 432         if ($server_url == "") {
 433                 $base = preg_replace("=(https?://)(.*?)/(.*)=ism", "$1$2", $profile);
 434                 if ($base != $profile) {
 435                         $server_url = $base;
 436                         $network = NETWORK_PHANTOM;
 437                 }
 438         }
 439
 440         if ($server_url == "") {
 441                 return "";
 442         }
 443
 444         $r = q("SELECT `id` FROM `gserver` WHERE `nurl` = '%s' AND `last_contact` > `last_failure`",
 445                 dbesc(normalise_link($server_url)));
 446         if (dbm::is_result($r)) {
 447                 return $server_url;
 448         }
 449
 450         // Fetch the host-meta to check if this really is a server
 451         $serverret = z_fetch_url($server_url."/.well-known/host-meta");
 452         if (!$serverret["success"]) {
 453                 return "";
 454         }
 455
 456         return $server_url;
 457 }
 458
 459 function poco_alternate_ostatus_url($url) {
 460         return(preg_match("=https?://.+/user/\d+=ism", $url, $matches));
 461 }
 462
 463 function poco_last_updated($profile, $force = false) {
 464
 465         $gcontacts = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s'",
 466                         dbesc(normalise_link($profile)));
 467
 468         if (!dbm::is_result($gcontacts)) {
 469                 return false;
 470         }
 471
 472         $contact = array("url" => $profile);
 473
 474         if ($gcontacts[0]["created"] <= NULL_DATE) {
 475                 $contact['created'] = datetime_convert();
 476         }
 477
 478         if ($force) {
 479                 $server_url = normalise_link(poco_detect_server($profile));
 480         }
 481
 482         if (($server_url == '') AND ($gcontacts[0]["server_url"] != "")) {
 483                 $server_url = $gcontacts[0]["server_url"];
 484         }
 485
 486         if (!$force AND (($server_url == '') OR ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
 487                 $server_url = normalise_link(poco_detect_server($profile));
 488         }
 489
 490         if (!in_array($gcontacts[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_FEED, NETWORK_OSTATUS, ""))) {
 491                 logger("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", LOGGER_DEBUG);
 492                 return false;
 493         }
 494
 495         if ($server_url != "") {
 496                 if (!poco_check_server($server_url, $gcontacts[0]["network"], $force)) {
 497                         if ($force) {
 498                                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 499                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 500                         }
 501
 502                         logger("Profile ".$profile.": Server ".$server_url." wasn't reachable.", LOGGER_DEBUG);
 503                         return false;
 504                 }
 505                 $contact['server_url'] = $server_url;
 506         }
 507
 508         if (in_array($gcontacts[0]["network"], array("", NETWORK_FEED))) {
 509                 $server = q("SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 510                         dbesc(normalise_link($server_url)));
 511
 512                 if ($server) {
 513                         $contact['network'] = $server[0]["network"];
 514                 } else {
 515                         return false;
 516                 }
 517         }
 518
 519         // noscrape is really fast so we don't cache the call.
 520         if (($server_url != "") AND ($gcontacts[0]["nick"] != "")) {
 521
 522                 //  Use noscrape if possible
 523                 $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($server_url)));
 524
 525                 if ($server) {
 526                         $noscraperet = z_fetch_url($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 527
 528                         if ($noscraperet["success"] AND ($noscraperet["body"] != "")) {
 529
 530                                 $noscrape = json_decode($noscraperet["body"], true);
 531
 532                                 if (is_array($noscrape)) {
 533                                         $contact["network"] = $server[0]["network"];
 534
 535                                         if (isset($noscrape["fn"])) {
 536                                                 $contact["name"] = $noscrape["fn"];
 537                                         }
 538                                         if (isset($noscrape["comm"])) {
 539                                                 $contact["community"] = $noscrape["comm"];
 540                                         }
 541                                         if (isset($noscrape["tags"])) {
 542                                                 $keywords = implode(" ", $noscrape["tags"]);
 543                                                 if ($keywords != "") {
 544                                                         $contact["keywords"] = $keywords;
 545                                                 }
 546                                         }
 547
 548                                         $location = formatted_location($noscrape);
 549                                         if ($location) {
 550                                                 $contact["location"] = $location;
 551                                         }
 552                                         if (isset($noscrape["dfrn-notify"])) {
 553                                                 $contact["notify"] = $noscrape["dfrn-notify"];
 554                                         }
 555                                         // Remove all fields that are not present in the gcontact table
 556                                         unset($noscrape["fn"]);
 557                                         unset($noscrape["key"]);
 558                                         unset($noscrape["homepage"]);
 559                                         unset($noscrape["comm"]);
 560                                         unset($noscrape["tags"]);
 561                                         unset($noscrape["locality"]);
 562                                         unset($noscrape["region"]);
 563                                         unset($noscrape["country-name"]);
 564                                         unset($noscrape["contacts"]);
 565                                         unset($noscrape["dfrn-request"]);
 566                                         unset($noscrape["dfrn-confirm"]);
 567                                         unset($noscrape["dfrn-notify"]);
 568                                         unset($noscrape["dfrn-poll"]);
 569
 570                                         // Set the date of the last contact
 571                                         /// @todo By now the function "update_gcontact" doesn't work with this field
 572                                         //$contact["last_contact"] = datetime_convert();
 573
 574                                         $contact = array_merge($contact, $noscrape);
 575
 576                                         update_gcontact($contact);
 577
 578                                         if (trim($noscrape["updated"]) != "") {
 579                                                 q("UPDATE `gcontact` SET `last_contact` = '%s' WHERE `nurl` = '%s'",
 580                                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 581
 582                                                 logger("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", LOGGER_DEBUG);
 583
 584                                                 return $noscrape["updated"];
 585                                         }
 586                                 }
 587                         }
 588                 }
 589         }
 590
 591         // If we only can poll the feed, then we only do this once a while
 592         if (!$force AND !poco_do_update($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
 593                 logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 594
 595                 update_gcontact($contact);
 596                 return $gcontacts[0]["updated"];
 597         }
 598
 599         $data = Probe::uri($profile);
 600
 601         // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 602         // Then check the other link and delete this one
 603         if (($data["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($profile) AND
 604                 (normalise_link($profile) == normalise_link($data["alias"])) AND
 605                 (normalise_link($profile) != normalise_link($data["url"]))) {
 606
 607                 // Delete the old entry
 608                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($profile)));
 609                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($gcontacts[0]["id"]));
 610
 611                 $gcontact = array_merge($gcontacts[0], $data);
 612
 613                 $gcontact["server_url"] = $data["baseurl"];
 614
 615                 try {
 616                         $gcontact = sanitize_gcontact($gcontact);
 617                         update_gcontact($gcontact);
 618
 619                         poco_last_updated($data["url"], $force);
 620                 } catch (Exception $e) {
 621                         logger($e->getMessage(), LOGGER_DEBUG);
 622                 }
 623
 624                 logger("Profile ".$profile." was deleted", LOGGER_DEBUG);
 625                 return false;
 626         }
 627
 628         if (($data["poll"] == "") OR (in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
 629                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 630                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 631
 632                 logger("Profile ".$profile." wasn't reachable (profile)", LOGGER_DEBUG);
 633                 return false;
 634         }
 635
 636         $contact = array_merge($contact, $data);
 637
 638         $contact["server_url"] = $data["baseurl"];
 639
 640         update_gcontact($contact);
 641
 642         $feedret = z_fetch_url($data["poll"]);
 643
 644         if (!$feedret["success"]) {
 645                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 646                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 647
 648                 logger("Profile ".$profile." wasn't reachable (no feed)", LOGGER_DEBUG);
 649                 return false;
 650         }
 651
 652         $doc = new DOMDocument();
 653         @$doc->loadXML($feedret["body"]);
 654
 655         $xpath = new DomXPath($doc);
 656         $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 657
 658         $entries = $xpath->query('/atom:feed/atom:entry');
 659
 660         $last_updated = "";
 661
 662         foreach ($entries AS $entry) {
 663                 $published = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 664                 $updated = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 665
 666                 if ($last_updated < $published)
 667                         $last_updated = $published;
 668
 669                 if ($last_updated < $updated)
 670                         $last_updated = $updated;
 671         }
 672
 673         // Maybe there aren't any entries. Then check if it is a valid feed
 674         if ($last_updated == "") {
 675                 if ($xpath->query('/atom:feed')->length > 0) {
 676                         $last_updated = NULL_DATE;
 677                 }
 678         }
 679         q("UPDATE `gcontact` SET `updated` = '%s', `last_contact` = '%s' WHERE `nurl` = '%s'",
 680                 dbesc(dbm::date($last_updated)), dbesc(dbm::date()), dbesc(normalise_link($profile)));
 681
 682         if (($gcontacts[0]["generation"] == 0)) {
 683                 q("UPDATE `gcontact` SET `generation` = 9 WHERE `nurl` = '%s'",
 684                         dbesc(normalise_link($profile)));
 685         }
 686
 687         logger("Profile ".$profile." was last updated at ".$last_updated, LOGGER_DEBUG);
 688
 689         return($last_updated);
 690 }
 691
 692 function poco_do_update($created, $updated, $last_failure,  $last_contact) {
 693         $now = strtotime(datetime_convert());
 694
 695         if ($updated > $last_contact)
 696                 $contact_time = strtotime($updated);
 697         else
 698                 $contact_time = strtotime($last_contact);
 699
 700         $failure_time = strtotime($last_failure);
 701         $created_time = strtotime($created);
 702
 703         // If there is no "created" time then use the current time
 704         if ($created_time <= 0)
 705                 $created_time = $now;
 706
 707         // If the last contact was less than 24 hours then don't update
 708         if (($now - $contact_time) < (60 * 60 * 24))
 709                 return false;
 710
 711         // If the last failure was less than 24 hours then don't update
 712         if (($now - $failure_time) < (60 * 60 * 24))
 713                 return false;
 714
 715         // If the last contact was less than a week ago and the last failure is older than a week then don't update
 716         //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) AND ($contact_time > $failure_time))
 717         //      return false;
 718
 719         // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 720         if ((($now - $contact_time) > (60 * 60 * 24 * 7)) AND (($now - $created_time) > (60 * 60 * 24 * 7)) AND (($now - $failure_time) < (60 * 60 * 24 * 7)))
 721                 return false;
 722
 723         // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 724         if ((($now - $contact_time) > (60 * 60 * 24 * 30)) AND (($now - $created_time) > (60 * 60 * 24 * 30)) AND (($now - $failure_time) < (60 * 60 * 24 * 30)))
 725                 return false;
 726
 727         return true;
 728 }
 729
 730 function poco_to_boolean($val) {
 731         if (($val == "true") OR ($val == 1))
 732                 return(true);
 733         if (($val == "false") OR ($val == 0))
 734                 return(false);
 735
 736         return ($val);
 737 }
 738
 739 /**
 740  * @brief Detect server type (Hubzilla or Friendica) via the poco data
 741  *
 742  * @param object $data POCO data
 743  * @return array Server data
 744  */
 745 function poco_detect_poco_data($data) {
 746         $server = false;
 747
 748         if (!isset($data->entry)) {
 749                 return false;
 750         }
 751
 752         if (count($data->entry) == 0) {
 753                 return false;
 754         }
 755
 756         if (!isset($data->entry[0]->urls)) {
 757                 return false;
 758         }
 759
 760         if (count($data->entry[0]->urls) == 0) {
 761                 return false;
 762         }
 763
 764         foreach ($data->entry[0]->urls AS $url) {
 765                 if ($url->type == 'zot') {
 766                         $server = array();
 767                         $server["platform"] = 'Hubzilla';
 768                         $server["network"] = NETWORK_DIASPORA;
 769                         return $server;
 770                 }
 771         }
 772         return false;
 773 }
 774
 775 /**
 776  * @brief Detect server type by using the nodeinfo data
 777  *
 778  * @param string $server_url address of the server
 779  * @return array Server data
 780  */
 781 function poco_fetch_nodeinfo($server_url) {
 782         $serverret = z_fetch_url($server_url."/.well-known/nodeinfo");
 783         if (!$serverret["success"]) {
 784                 return false;
 785         }
 786
 787         $nodeinfo = json_decode($serverret['body']);
 788
 789         if (!is_object($nodeinfo)) {
 790                 return false;
 791         }
 792
 793         if (!is_array($nodeinfo->links)) {
 794                 return false;
 795         }
 796
 797         $nodeinfo_url = '';
 798
 799         foreach ($nodeinfo->links AS $link) {
 800                 if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
 801                         $nodeinfo_url = $link->href;
 802                 }
 803         }
 804
 805         if ($nodeinfo_url == '') {
 806                 return false;
 807         }
 808
 809         $serverret = z_fetch_url($nodeinfo_url);
 810         if (!$serverret["success"]) {
 811                 return false;
 812         }
 813
 814         $nodeinfo = json_decode($serverret['body']);
 815
 816         if (!is_object($nodeinfo)) {
 817                 return false;
 818         }
 819
 820         $server = array();
 821
 822         $server['register_policy'] = REGISTER_CLOSED;
 823
 824         if (is_bool($nodeinfo->openRegistrations) AND $nodeinfo->openRegistrations) {
 825                 $server['register_policy'] = REGISTER_OPEN;
 826         }
 827
 828         if (is_object($nodeinfo->software)) {
 829                 if (isset($nodeinfo->software->name)) {
 830                         $server['platform'] = $nodeinfo->software->name;
 831                 }
 832
 833                 if (isset($nodeinfo->software->version)) {
 834                         $server['version'] = $nodeinfo->software->version;
 835                         // Version numbers on Nodeinfo are presented with additional info, e.g.:
 836                         // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 837                         $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 838                 }
 839         }
 840
 841         if (is_object($nodeinfo->metadata)) {
 842                 if (isset($nodeinfo->metadata->nodeName)) {
 843                         $server['site_name'] = $nodeinfo->metadata->nodeName;
 844                 }
 845         }
 846
 847         $diaspora = false;
 848         $friendica = false;
 849         $gnusocial = false;
 850
 851         if (is_array($nodeinfo->protocols->inbound)) {
 852                 foreach ($nodeinfo->protocols->inbound AS $inbound) {
 853                         if ($inbound == 'diaspora') {
 854                                 $diaspora = true;
 855                         }
 856                         if ($inbound == 'friendica') {
 857                                 $friendica = true;
 858                         }
 859                         if ($inbound == 'gnusocial') {
 860                                 $gnusocial = true;
 861                         }
 862                 }
 863         }
 864
 865         if ($gnusocial) {
 866                 $server['network'] = NETWORK_OSTATUS;
 867         }
 868         if ($diaspora) {
 869                 $server['network'] = NETWORK_DIASPORA;
 870         }
 871         if ($friendica) {
 872                 $server['network'] = NETWORK_DFRN;
 873         }
 874
 875         if (!$server) {
 876                 return false;
 877         }
 878
 879         return $server;
 880 }
 881
 882 /**
 883  * @brief Detect server type (Hubzilla or Friendica) via the front page body
 884  *
 885  * @param string $body Front page of the server
 886  * @return array Server data
 887  */
 888 function poco_detect_server_type($body) {
 889         $server = false;
 890
 891         $doc = new \DOMDocument();
 892         @$doc->loadHTML($body);
 893         $xpath = new \DomXPath($doc);
 894
 895         $list = $xpath->query("//meta[@name]");
 896
 897         foreach ($list as $node) {
 898                 $attr = array();
 899                 if ($node->attributes->length) {
 900                         foreach ($node->attributes as $attribute) {
 901                                 $attr[$attribute->name] = $attribute->value;
 902                         }
 903                 }
 904                 if ($attr['name'] == 'generator') {
 905                         $version_part = explode(" ", $attr['content']);
 906                         if (count($version_part) == 2) {
 907                                 if (in_array($version_part[0], array("Friendika", "Friendica"))) {
 908                                         $server = array();
 909                                         $server["platform"] = $version_part[0];
 910                                         $server["version"] = $version_part[1];
 911                                         $server["network"] = NETWORK_DFRN;
 912                                 }
 913                         }
 914                 }
 915         }
 916
 917         if (!$server) {
 918                 $list = $xpath->query("//meta[@property]");
 919
 920                 foreach ($list as $node) {
 921                         $attr = array();
 922                         if ($node->attributes->length) {
 923                                 foreach ($node->attributes as $attribute) {
 924                                         $attr[$attribute->name] = $attribute->value;
 925                                 }
 926                         }
 927                         if ($attr['property'] == 'generator') {
 928                                 if (in_array($attr['content'], array("hubzilla", "BlaBlaNet"))) {
 929                                         $server = array();
 930                                         $server["platform"] = $attr['content'];
 931                                         $server["version"] = "";
 932                                         $server["network"] = NETWORK_DIASPORA;
 933                                 }
 934                         }
 935                 }
 936         }
 937
 938         if (!$server) {
 939                 return false;
 940         }
 941
 942         $server["site_name"] = $xpath->evaluate($element."//head/title/text()", $context)->item(0)->nodeValue;
 943         return $server;
 944 }
 945
 946 function poco_check_server($server_url, $network = "", $force = false) {
 947
 948         // Unify the server address
 949         $server_url = trim($server_url, "/");
 950         $server_url = str_replace("/index.php", "", $server_url);
 951
 952         if ($server_url == "")
 953                 return false;
 954
 955         $servers = q("SELECT * FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
 956         if (dbm::is_result($servers)) {
 957
 958                 if ($servers[0]["created"] <= NULL_DATE) {
 959                         q("UPDATE `gserver` SET `created` = '%s' WHERE `nurl` = '%s'",
 960                                 dbesc(datetime_convert()), dbesc(normalise_link($server_url)));
 961                 }
 962                 $poco = $servers[0]["poco"];
 963                 $noscrape = $servers[0]["noscrape"];
 964
 965                 if ($network == "")
 966                         $network = $servers[0]["network"];
 967
 968                 $last_contact = $servers[0]["last_contact"];
 969                 $last_failure = $servers[0]["last_failure"];
 970                 $version = $servers[0]["version"];
 971                 $platform = $servers[0]["platform"];
 972                 $site_name = $servers[0]["site_name"];
 973                 $info = $servers[0]["info"];
 974                 $register_policy = $servers[0]["register_policy"];
 975
 976                 if (!$force AND !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
 977                         logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 978                         return ($last_contact >= $last_failure);
 979                 }
 980         } else {
 981                 $poco = "";
 982                 $noscrape = "";
 983                 $version = "";
 984                 $platform = "";
 985                 $site_name = "";
 986                 $info = "";
 987                 $register_policy = -1;
 988
 989                 $last_contact = NULL_DATE;
 990                 $last_failure = NULL_DATE;
 991         }
 992         logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$servers[0]["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 993
 994         $failure = false;
 995         $possible_failure = false;
 996         $orig_last_failure = $last_failure;
 997         $orig_last_contact = $last_contact;
 998
 999         // Check if the page is accessible via SSL.
1000         $orig_server_url = $server_url;
1001         $server_url = str_replace("http://", "https://", $server_url);
1002
1003         // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1004         $serverret = z_fetch_url($server_url."/.well-known/host-meta", false, $redirects, array('timeout' => 20));
1005
1006         // Quit if there is a timeout.
1007         // But we want to make sure to only quit if we are mostly sure that this server url fits.
1008         if (dbm::is_result($servers) AND ($orig_server_url == $server_url) AND
1009                 ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
1010                 logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1011                 return false;
1012         }
1013
1014         // Maybe the page is unencrypted only?
1015         $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1016         if (!$serverret["success"] OR ($serverret["body"] == "") OR (@sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
1017                 $server_url = str_replace("https://", "http://", $server_url);
1018
1019                 // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1020                 $serverret = z_fetch_url($server_url."/.well-known/host-meta", false, $redirects, array('timeout' => 20));
1021
1022                 // Quit if there is a timeout
1023                 if ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1024                         logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
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 (!$serverret["success"] OR ($serverret["body"] == "") OR (sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
1032                 // Workaround for bad configured servers (known nginx problem)
1033                 if (!in_array($serverret["debug"]["http_code"], array("403", "404"))) {
1034                         $last_failure = datetime_convert();
1035                         $failure = true;
1036                 }
1037                 $possible_failure = true;
1038         } elseif ($network == NETWORK_DIASPORA)
1039                 $last_contact = datetime_convert();
1040
1041         // If the server has no possible failure we reset the cached data
1042         if (!$possible_failure) {
1043                 $version = "";
1044                 $platform = "";
1045                 $site_name = "";
1046                 $info = "";
1047                 $register_policy = -1;
1048         }
1049
1050         // Look for poco
1051         if (!$failure) {
1052                 $serverret = z_fetch_url($server_url."/poco");
1053                 if ($serverret["success"]) {
1054                         $data = json_decode($serverret["body"]);
1055                         if (isset($data->totalResults)) {
1056                                 $poco = $server_url."/poco";
1057                                 $last_contact = datetime_convert();
1058
1059                                 $server = poco_detect_poco_data($data);
1060                                 if ($server) {
1061                                         $platform = $server['platform'];
1062                                         $network = $server['network'];
1063                                         $version = '';
1064                                         $site_name = '';
1065                                 }
1066                         }
1067                 }
1068         }
1069
1070         if (!$failure) {
1071                 // Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
1072                 $serverret = z_fetch_url($server_url);
1073
1074                 if (!$serverret["success"] OR ($serverret["body"] == "")) {
1075                         $last_failure = datetime_convert();
1076                         $failure = true;
1077                 } else {
1078                         $server = poco_detect_server_type($serverret["body"]);
1079                         if ($server) {
1080                                 $platform = $server['platform'];
1081                                 $network = $server['network'];
1082                                 $version = $server['version'];
1083                                 $site_name = $server['site_name'];
1084                                 $last_contact = datetime_convert();
1085                         }
1086
1087                         $lines = explode("\n",$serverret["header"]);
1088                         if(count($lines)) {
1089                                 foreach($lines as $line) {
1090                                         $line = trim($line);
1091                                         if(stristr($line,'X-Diaspora-Version:')) {
1092                                                 $platform = "Diaspora";
1093                                                 $version = trim(str_replace("X-Diaspora-Version:", "", $line));
1094                                                 $version = trim(str_replace("x-diaspora-version:", "", $version));
1095                                                 $network = NETWORK_DIASPORA;
1096                                                 $versionparts = explode("-", $version);
1097                                                 $version = $versionparts[0];
1098                                                 $last_contact = datetime_convert();
1099                                         }
1100
1101                                         if(stristr($line,'Server: Mastodon')) {
1102                                                 $platform = "Mastodon";
1103                                                 $network = NETWORK_OSTATUS;
1104                                                 // Mastodon doesn't reveal version numbers
1105                                                 $version = "";
1106                                                 $last_contact = datetime_convert();
1107                                         }
1108                                 }
1109                         }
1110                 }
1111         }
1112
1113         if (!$failure AND ($poco == "")) {
1114                 // Test for Statusnet
1115                 // Will also return data for Friendica and GNU Social - but it will be overwritten later
1116                 // The "not implemented" is a special treatment for really, really old Friendica versions
1117                 $serverret = z_fetch_url($server_url."/api/statusnet/version.json");
1118                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
1119                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
1120                         $platform = "StatusNet";
1121                         // Remove junk that some GNU Social servers return
1122                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1123                         $version = trim($version, '"');
1124                         $network = NETWORK_OSTATUS;
1125                         $last_contact = datetime_convert();
1126                 }
1127
1128                 // Test for GNU Social
1129                 $serverret = z_fetch_url($server_url."/api/gnusocial/version.json");
1130                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
1131                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
1132                         $platform = "GNU Social";
1133                         // Remove junk that some GNU Social servers return
1134                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1135                         $version = trim($version, '"');
1136                         $network = NETWORK_OSTATUS;
1137                         $last_contact = datetime_convert();
1138                 }
1139         }
1140
1141         if (!$failure) {
1142                 // Test for Hubzilla, Redmatrix or Friendica
1143                 $serverret = z_fetch_url($server_url."/api/statusnet/config.json");
1144                 if ($serverret["success"]) {
1145                         $data = json_decode($serverret["body"]);
1146                         if (isset($data->site->server)) {
1147                                 $last_contact = datetime_convert();
1148
1149                                 if (isset($data->site->platform)) {
1150                                         $platform = $data->site->platform->PLATFORM_NAME;
1151                                         $version = $data->site->platform->STD_VERSION;
1152                                         $network = NETWORK_DIASPORA;
1153                                 }
1154                                 if (isset($data->site->BlaBlaNet)) {
1155                                         $platform = $data->site->BlaBlaNet->PLATFORM_NAME;
1156                                         $version = $data->site->BlaBlaNet->STD_VERSION;
1157                                         $network = NETWORK_DIASPORA;
1158                                 }
1159                                 if (isset($data->site->hubzilla)) {
1160                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
1161                                         $version = $data->site->hubzilla->RED_VERSION;
1162                                         $network = NETWORK_DIASPORA;
1163                                 }
1164                                 if (isset($data->site->redmatrix)) {
1165                                         if (isset($data->site->redmatrix->PLATFORM_NAME))
1166                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
1167                                         elseif (isset($data->site->redmatrix->RED_PLATFORM))
1168                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
1169
1170                                         $version = $data->site->redmatrix->RED_VERSION;
1171                                         $network = NETWORK_DIASPORA;
1172                                 }
1173                                 if (isset($data->site->friendica)) {
1174                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
1175                                         $version = $data->site->friendica->FRIENDICA_VERSION;
1176                                         $network = NETWORK_DFRN;
1177                                 }
1178
1179                                 $site_name = $data->site->name;
1180
1181                                 $data->site->closed = poco_to_boolean($data->site->closed);
1182                                 $data->site->private = poco_to_boolean($data->site->private);
1183                                 $data->site->inviteonly = poco_to_boolean($data->site->inviteonly);
1184
1185                                 if (!$data->site->closed AND !$data->site->private and $data->site->inviteonly)
1186                                         $register_policy = REGISTER_APPROVE;
1187                                 elseif (!$data->site->closed AND !$data->site->private)
1188                                         $register_policy = REGISTER_OPEN;
1189                                 else
1190                                         $register_policy = REGISTER_CLOSED;
1191                         }
1192                 }
1193         }
1194
1195
1196         // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
1197         if (!$failure) {
1198                 $serverret = z_fetch_url($server_url."/statistics.json");
1199                 if ($serverret["success"]) {
1200                         $data = json_decode($serverret["body"]);
1201                         if (isset($data->version)) {
1202                                 $version = $data->version;
1203                                 // Version numbers on statistics.json are presented with additional info, e.g.:
1204                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
1205                                 $version = preg_replace("=(.+)-(.{4,})=ism", "$1", $version);
1206                         }
1207
1208                         $site_name = $data->name;
1209
1210                         if (isset($data->network)) {
1211                                 $platform = $data->network;
1212                         }
1213
1214                         if ($platform == "Diaspora") {
1215                                 $network = NETWORK_DIASPORA;
1216                         }
1217
1218                         if ($data->registrations_open) {
1219                                 $register_policy = REGISTER_OPEN;
1220                         } else {
1221                                 $register_policy = REGISTER_CLOSED;
1222                         }
1223
1224                         if (isset($data->version))
1225                                 $last_contact = datetime_convert();
1226                 }
1227         }
1228
1229         // Query nodeinfo. Working for (at least) Diaspora and Friendica.
1230         if (!$failure) {
1231                 $server = poco_fetch_nodeinfo($server_url);
1232                 if ($server) {
1233                         $register_policy = $server['register_policy'];
1234
1235                         if (isset($server['platform'])) {
1236                                 $platform = $server['platform'];
1237                         }
1238
1239                         if (isset($server['network'])) {
1240                                 $network = $server['network'];
1241                         }
1242
1243                         if (isset($server['version'])) {
1244                                 $version = $server['version'];
1245                         }
1246
1247                         if (isset($server['site_name'])) {
1248                                 $site_name = $server['site_name'];
1249                         }
1250
1251                         $last_contact = datetime_convert();
1252                 }
1253         }
1254
1255         // Check for noscrape
1256         // Friendica servers could be detected as OStatus servers
1257         if (!$failure AND in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
1258                 $serverret = z_fetch_url($server_url."/friendica/json");
1259
1260                 if (!$serverret["success"])
1261                         $serverret = z_fetch_url($server_url."/friendika/json");
1262
1263                 if ($serverret["success"]) {
1264                         $data = json_decode($serverret["body"]);
1265
1266                         if (isset($data->version)) {
1267                                 $last_contact = datetime_convert();
1268                                 $network = NETWORK_DFRN;
1269
1270                                 $noscrape = $data->no_scrape_url;
1271                                 $version = $data->version;
1272                                 $site_name = $data->site_name;
1273                                 $info = $data->info;
1274                                 $register_policy_str = $data->register_policy;
1275                                 $platform = $data->platform;
1276
1277                                 switch ($register_policy_str) {
1278                                         case "REGISTER_CLOSED":
1279                                                 $register_policy = REGISTER_CLOSED;
1280                                                 break;
1281                                         case "REGISTER_APPROVE":
1282                                                 $register_policy = REGISTER_APPROVE;
1283                                                 break;
1284                                         case "REGISTER_OPEN":
1285                                                 $register_policy = REGISTER_OPEN;
1286                                                 break;
1287                                 }
1288                         }
1289                 }
1290         }
1291
1292         if ($possible_failure AND !$failure) {
1293                 $last_failure = datetime_convert();
1294                 $failure = true;
1295         }
1296
1297         if ($failure) {
1298                 $last_contact = $orig_last_contact;
1299         } else {
1300                 $last_failure = $orig_last_failure;
1301         }
1302
1303         if (($last_contact <= $last_failure) AND !$failure) {
1304                 logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
1305         } else if (($last_contact >= $last_failure) AND $failure) {
1306                 logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
1307         }
1308
1309         // Check again if the server exists
1310         $servers = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1311
1312         $version = strip_tags($version);
1313         $site_name = strip_tags($site_name);
1314         $info = strip_tags($info);
1315         $platform = strip_tags($platform);
1316
1317         if ($servers) {
1318                  q("UPDATE `gserver` SET `url` = '%s', `version` = '%s', `site_name` = '%s', `info` = '%s', `register_policy` = %d, `poco` = '%s', `noscrape` = '%s',
1319                         `network` = '%s', `platform` = '%s', `last_contact` = '%s', `last_failure` = '%s' WHERE `nurl` = '%s'",
1320                         dbesc($server_url),
1321                         dbesc($version),
1322                         dbesc($site_name),
1323                         dbesc($info),
1324                         intval($register_policy),
1325                         dbesc($poco),
1326                         dbesc($noscrape),
1327                         dbesc($network),
1328                         dbesc($platform),
1329                         dbesc($last_contact),
1330                         dbesc($last_failure),
1331                         dbesc(normalise_link($server_url))
1332                 );
1333         } elseif (!$failure) {
1334                 q("INSERT INTO `gserver` (`url`, `nurl`, `version`, `site_name`, `info`, `register_policy`, `poco`, `noscrape`, `network`, `platform`, `created`, `last_contact`, `last_failure`)
1335                                         VALUES ('%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s')",
1336                                 dbesc($server_url),
1337                                 dbesc(normalise_link($server_url)),
1338                                 dbesc($version),
1339                                 dbesc($site_name),
1340                                 dbesc($info),
1341                                 intval($register_policy),
1342                                 dbesc($poco),
1343                                 dbesc($noscrape),
1344                                 dbesc($network),
1345                                 dbesc($platform),
1346                                 dbesc(datetime_convert()),
1347                                 dbesc($last_contact),
1348                                 dbesc($last_failure),
1349                                 dbesc(datetime_convert())
1350                 );
1351         }
1352         logger("End discovery for server ".$server_url, LOGGER_DEBUG);
1353
1354         return !$failure;
1355 }
1356
1357 function count_common_friends($uid,$cid) {
1358
1359         $r = q("SELECT count(*) as `total`
1360                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1361                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1362                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1363                 AND `gcontact`.`nurl` IN (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 and id != %d ) ",
1364                 intval($cid),
1365                 intval($uid),
1366                 intval($uid),
1367                 intval($cid)
1368         );
1369
1370 //      logger("count_common_friends: $uid $cid {$r[0]['total']}");
1371         if (dbm::is_result($r))
1372                 return $r[0]['total'];
1373         return 0;
1374
1375 }
1376
1377
1378 function common_friends($uid,$cid,$start = 0,$limit=9999,$shuffle = false) {
1379
1380         if($shuffle)
1381                 $sql_extra = " order by rand() ";
1382         else
1383                 $sql_extra = " order by `gcontact`.`name` asc ";
1384
1385         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1386                 FROM `glink`
1387                 INNER JOIN `gcontact` ON `glink`.`gcid` = `gcontact`.`id`
1388                 INNER JOIN `contact` ON `gcontact`.`nurl` = `contact`.`nurl`
1389                 WHERE `glink`.`cid` = %d and `glink`.`uid` = %d
1390                         AND `contact`.`uid` = %d AND `contact`.`self` = 0 AND `contact`.`blocked` = 0
1391                         AND `contact`.`hidden` = 0 AND `contact`.`id` != %d
1392                         AND ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1393                         $sql_extra LIMIT %d, %d",
1394                 intval($cid),
1395                 intval($uid),
1396                 intval($uid),
1397                 intval($cid),
1398                 intval($start),
1399                 intval($limit)
1400         );
1401
1402         return $r;
1403
1404 }
1405
1406
1407 function count_common_friends_zcid($uid,$zcid) {
1408
1409         $r = q("SELECT count(*) as `total`
1410                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1411                 where `glink`.`zcid` = %d
1412                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 ) ",
1413                 intval($zcid),
1414                 intval($uid)
1415         );
1416
1417         if (dbm::is_result($r))
1418                 return $r[0]['total'];
1419         return 0;
1420
1421 }
1422
1423 function common_friends_zcid($uid,$zcid,$start = 0, $limit = 9999,$shuffle = false) {
1424
1425         if($shuffle)
1426                 $sql_extra = " order by rand() ";
1427         else
1428                 $sql_extra = " order by `gcontact`.`name` asc ";
1429
1430         $r = q("SELECT `gcontact`.*
1431                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1432                 where `glink`.`zcid` = %d
1433                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 )
1434                 $sql_extra limit %d, %d",
1435                 intval($zcid),
1436                 intval($uid),
1437                 intval($start),
1438                 intval($limit)
1439         );
1440
1441         return $r;
1442
1443 }
1444
1445
1446 function count_all_friends($uid,$cid) {
1447
1448         $r = q("SELECT count(*) as `total`
1449                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1450                 where `glink`.`cid` = %d and `glink`.`uid` = %d AND
1451                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))",
1452                 intval($cid),
1453                 intval($uid)
1454         );
1455
1456         if (dbm::is_result($r))
1457                 return $r[0]['total'];
1458         return 0;
1459
1460 }
1461
1462
1463 function all_friends($uid,$cid,$start = 0, $limit = 80) {
1464
1465         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1466                 FROM `glink`
1467                 INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1468                 LEFT JOIN `contact` ON `contact`.`nurl` = `gcontact`.`nurl` AND `contact`.`uid` = %d
1469                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1470                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1471                 ORDER BY `gcontact`.`name` ASC LIMIT %d, %d ",
1472                 intval($uid),
1473                 intval($cid),
1474                 intval($uid),
1475                 intval($start),
1476                 intval($limit)
1477         );
1478
1479         return $r;
1480 }
1481
1482
1483
1484 function suggestion_query($uid, $start = 0, $limit = 80) {
1485
1486         if (!$uid) {
1487                 return array();
1488         }
1489
1490 // Uncommented because the result of the queries are to big to store it in the cache.
1491 // We need to decide if we want to change the db column type or if we want to delete it.
1492 //      $list = Cache::get("suggestion_query:".$uid.":".$start.":".$limit);
1493 //      if (!is_null($list)) {
1494 //              return $list;
1495 //      }
1496
1497         $network = array(NETWORK_DFRN);
1498
1499         if (get_config('system','diaspora_enabled'))
1500                 $network[] = NETWORK_DIASPORA;
1501
1502         if (!get_config('system','ostatus_disabled'))
1503                 $network[] = NETWORK_OSTATUS;
1504
1505         $sql_network = implode("', '", $network);
1506         $sql_network = "'".$sql_network."'";
1507
1508         /// @todo This query is really slow
1509         // By now we cache the data for five minutes
1510         $r = q("SELECT count(glink.gcid) as `total`, gcontact.* from gcontact
1511                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1512                 where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
1513                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1514                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1515                 AND `gcontact`.`updated` >= '%s'
1516                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1517                 AND `gcontact`.`network` IN (%s)
1518                 GROUP BY `glink`.`gcid` ORDER BY `gcontact`.`updated` DESC,`total` DESC LIMIT %d, %d",
1519                 intval($uid),
1520                 intval($uid),
1521                 intval($uid),
1522                 intval($uid),
1523                 dbesc(NULL_DATE),
1524                 $sql_network,
1525                 intval($start),
1526                 intval($limit)
1527         );
1528
1529         if (dbm::is_result($r) && count($r) >= ($limit -1)) {
1530 // Uncommented because the result of the queries are to big to store it in the cache.
1531 // We need to decide if we want to change the db column type or if we want to delete it.
1532 //              Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $r, CACHE_FIVE_MINUTES);
1533
1534                 return $r;
1535         }
1536
1537         $r2 = q("SELECT gcontact.* FROM gcontact
1538                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1539                 WHERE `glink`.`uid` = 0 AND `glink`.`cid` = 0 AND `glink`.`zcid` = 0 AND NOT `gcontact`.`nurl` IN (SELECT `nurl` FROM `contact` WHERE `uid` = %d)
1540                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1541                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1542                 AND `gcontact`.`updated` >= '%s'
1543                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1544                 AND `gcontact`.`network` IN (%s)
1545                 ORDER BY rand() LIMIT %d, %d",
1546                 intval($uid),
1547                 intval($uid),
1548                 intval($uid),
1549                 dbesc(NULL_DATE),
1550                 $sql_network,
1551                 intval($start),
1552                 intval($limit)
1553         );
1554
1555         $list = array();
1556         foreach ($r2 AS $suggestion)
1557                 $list[$suggestion["nurl"]] = $suggestion;
1558
1559         foreach ($r AS $suggestion)
1560                 $list[$suggestion["nurl"]] = $suggestion;
1561
1562         while (sizeof($list) > ($limit))
1563                 array_pop($list);
1564
1565 // Uncommented because the result of the queries are to big to store it in the cache.
1566 // We need to decide if we want to change the db column type or if we want to delete it.
1567 //      Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $list, CACHE_FIVE_MINUTES);
1568         return $list;
1569 }
1570
1571 function update_suggestions() {
1572
1573         $a = get_app();
1574
1575         $done = array();
1576
1577         /// @TODO Check if it is really neccessary to poll the own server
1578         poco_load(0,0,0,App::get_baseurl() . '/poco');
1579
1580         $done[] = App::get_baseurl() . '/poco';
1581
1582         if (strlen(get_config('system','directory'))) {
1583                 $x = fetch_url(get_server()."/pubsites");
1584                 if ($x) {
1585                         $j = json_decode($x);
1586                         if ($j->entries) {
1587                                 foreach ($j->entries as $entry) {
1588
1589                                         poco_check_server($entry->url);
1590
1591                                         $url = $entry->url . '/poco';
1592                                         if (! in_array($url,$done)) {
1593                                                 poco_load(0,0,0,$entry->url . '/poco');
1594                                         }
1595                                 }
1596                         }
1597                 }
1598         }
1599
1600         // Query your contacts from Friendica and Redmatrix/Hubzilla for their contacts
1601         $r = q("SELECT DISTINCT(`poco`) AS `poco` FROM `contact` WHERE `network` IN ('%s', '%s')",
1602                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA)
1603         );
1604
1605         if (dbm::is_result($r)) {
1606                 foreach ($r as $rr) {
1607                         $base = substr($rr['poco'],0,strrpos($rr['poco'],'/'));
1608                         if(! in_array($base,$done))
1609                                 poco_load(0,0,0,$base);
1610                 }
1611         }
1612 }
1613
1614 /**
1615  * @brief Fetch server list from remote servers and adds them when they are new.
1616  *
1617  * @param string $poco URL to the POCO endpoint
1618  */
1619 function poco_fetch_serverlist($poco) {
1620         $serverret = z_fetch_url($poco."/@server");
1621         if (!$serverret["success"]) {
1622                 return;
1623         }
1624         $serverlist = json_decode($serverret['body']);
1625
1626         if (!is_array($serverlist)) {
1627                 return;
1628         }
1629
1630         foreach ($serverlist AS $server) {
1631                 $server_url = str_replace("/index.php", "", $server->url);
1632
1633                 $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1634                 if (!dbm::is_result($r)) {
1635                         logger("Call server check for server ".$server_url, LOGGER_DEBUG);
1636                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode($server_url));
1637                 }
1638         }
1639 }
1640
1641 function poco_discover_federation() {
1642         $last = get_config('poco','last_federation_discovery');
1643
1644         if ($last) {
1645                 $next = $last + (24 * 60 * 60);
1646                 if($next > time())
1647                         return;
1648         }
1649
1650         // Discover Friendica, Hubzilla and Diaspora servers
1651         $serverdata = fetch_url("http://the-federation.info/pods.json");
1652
1653         if ($serverdata) {
1654                 $servers = json_decode($serverdata);
1655
1656                 foreach ($servers->pods AS $server) {
1657                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode("https://".$server->host));
1658                 }
1659         }
1660
1661         // Disvover Mastodon servers
1662         if (!Config::get('system','ostatus_disabled')) {
1663                 $serverdata = fetch_url("https://instances.mastodon.xyz/instances.json");
1664
1665                 if ($serverdata) {
1666                         $servers = json_decode($serverdata);
1667
1668                         foreach ($servers AS $server) {
1669                                 $url = (is_null($server->https_score) ? 'http' : 'https').'://'.$server->name;
1670                                 proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode($url));
1671                         }
1672                 }
1673         }
1674
1675         // Currently disabled, since the service isn't available anymore.
1676         // It is not removed since I hope that there will be a successor.
1677         // Discover GNU Social Servers.
1678         //if (!get_config('system','ostatus_disabled')) {
1679         //      $serverdata = "http://gstools.org/api/get_open_instances/";
1680
1681         //      $result = z_fetch_url($serverdata);
1682         //      if ($result["success"]) {
1683         //              $servers = json_decode($result["body"]);
1684
1685         //              foreach($servers->data AS $server)
1686         //                      poco_check_server($server->instance_address);
1687         //      }
1688         //}
1689
1690         set_config('poco','last_federation_discovery', time());
1691 }
1692
1693 function poco_discover_single_server($id) {
1694         $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `id` = %d", intval($id));
1695         if (!dbm::is_result($r)) {
1696                 return false;
1697         }
1698
1699         $server = $r[0];
1700
1701         // Discover new servers out there (Works from Friendica version 3.5.2)
1702         poco_fetch_serverlist($server["poco"]);
1703
1704         // Fetch all users from the other server
1705         $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1706
1707         logger("Fetch all users from the server ".$server["url"], LOGGER_DEBUG);
1708
1709         $retdata = z_fetch_url($url);
1710         if ($retdata["success"]) {
1711                 $data = json_decode($retdata["body"]);
1712
1713                 poco_discover_server($data, 2);
1714
1715                 if (get_config('system','poco_discovery') > 1) {
1716
1717                         $timeframe = get_config('system','poco_discovery_since');
1718                         if ($timeframe == 0) {
1719                                 $timeframe = 30;
1720                         }
1721
1722                         $updatedSince = date("Y-m-d H:i:s", time() - $timeframe * 86400);
1723
1724                         // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1725                         $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1726
1727                         $success = false;
1728
1729                         $retdata = z_fetch_url($url);
1730                         if ($retdata["success"]) {
1731                                 logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1732                                 $success = poco_discover_server(json_decode($retdata["body"]));
1733                         }
1734
1735                         if (!$success AND (get_config('system','poco_discovery') > 2)) {
1736                                 logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1737                                 poco_discover_server_users($data, $server);
1738                         }
1739                 }
1740
1741                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1742
1743                 return true;
1744         } else {
1745                 // If the server hadn't replied correctly, then force a sanity check
1746                 poco_check_server($server["url"], $server["network"], true);
1747
1748                 // If we couldn't reach the server, we will try it some time later
1749                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1750
1751                 return false;
1752         }
1753 }
1754
1755 function poco_discover($complete = false) {
1756
1757         // Update the server list
1758         poco_discover_federation();
1759
1760         $no_of_queries = 5;
1761
1762         $requery_days = intval(get_config("system", "poco_requery_days"));
1763
1764         if ($requery_days == 0) {
1765                 $requery_days = 7;
1766         }
1767         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1768
1769         $r = q("SELECT `id`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1770         if (dbm::is_result($r)) {
1771                 foreach ($r AS $server) {
1772
1773                         if (!poco_check_server($server["url"], $server["network"])) {
1774                                 // The server is not reachable? Okay, then we will try it later
1775                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1776                                 continue;
1777                         }
1778
1779                         logger('Update directory from server '.$server['url'].' with ID '.$server['id'], LOGGER_DEBUG);
1780                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "update_server_directory", intval($server['id']));
1781
1782                         if (!$complete AND (--$no_of_queries == 0)) {
1783                                 break;
1784                         }
1785                 }
1786         }
1787 }
1788
1789 function poco_discover_server_users($data, $server) {
1790
1791         if (!isset($data->entry))
1792                 return;
1793
1794         foreach ($data->entry AS $entry) {
1795                 $username = "";
1796                 if (isset($entry->urls)) {
1797                         foreach($entry->urls as $url)
1798                                 if ($url->type == 'profile') {
1799                                         $profile_url = $url->value;
1800                                         $urlparts = parse_url($profile_url);
1801                                         $username = end(explode("/", $urlparts["path"]));
1802                                 }
1803                 }
1804                 if ($username != "") {
1805                         logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1806
1807                         // Fetch all contacts from a given user from the other server
1808                         $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1809
1810                         $retdata = z_fetch_url($url);
1811                         if ($retdata["success"])
1812                                 poco_discover_server(json_decode($retdata["body"]), 3);
1813                 }
1814         }
1815 }
1816
1817 function poco_discover_server($data, $default_generation = 0) {
1818
1819         if (!isset($data->entry) OR !count($data->entry))
1820                 return false;
1821
1822         $success = false;
1823
1824         foreach ($data->entry AS $entry) {
1825                 $profile_url = '';
1826                 $profile_photo = '';
1827                 $connect_url = '';
1828                 $name = '';
1829                 $network = '';
1830                 $updated = NULL_DATE;
1831                 $location = '';
1832                 $about = '';
1833                 $keywords = '';
1834                 $gender = '';
1835                 $contact_type = -1;
1836                 $generation = $default_generation;
1837
1838                 $name = $entry->displayName;
1839
1840                 if (isset($entry->urls)) {
1841                         foreach($entry->urls as $url) {
1842                                 if ($url->type == 'profile') {
1843                                         $profile_url = $url->value;
1844                                         continue;
1845                                 }
1846                                 if ($url->type == 'webfinger') {
1847                                         $connect_url = str_replace('acct:' , '', $url->value);
1848                                         continue;
1849                                 }
1850                         }
1851                 }
1852
1853                 if (isset($entry->photos)) {
1854                         foreach ($entry->photos as $photo) {
1855                                 if ($photo->type == 'profile') {
1856                                         $profile_photo = $photo->value;
1857                                         continue;
1858                                 }
1859                         }
1860                 }
1861
1862                 if (isset($entry->updated)) {
1863                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
1864                 }
1865
1866                 if(isset($entry->network)) {
1867                         $network = $entry->network;
1868                 }
1869
1870                 if(isset($entry->currentLocation)) {
1871                         $location = $entry->currentLocation;
1872                 }
1873
1874                 if(isset($entry->aboutMe)) {
1875                         $about = html2bbcode($entry->aboutMe);
1876                 }
1877
1878                 if(isset($entry->gender)) {
1879                         $gender = $entry->gender;
1880                 }
1881
1882                 if(isset($entry->generation) AND ($entry->generation > 0)) {
1883                         $generation = ++$entry->generation;
1884                 }
1885
1886                 if(isset($entry->contactType) AND ($entry->contactType >= 0)) {
1887                         $contact_type = $entry->contactType;
1888                 }
1889
1890                 if(isset($entry->tags)) {
1891                         foreach ($entry->tags as $tag) {
1892                                 $keywords = implode(", ", $tag);
1893                         }
1894                 }
1895
1896                 if ($generation > 0) {
1897                         $success = true;
1898
1899                         logger("Store profile ".$profile_url, LOGGER_DEBUG);
1900
1901                         $gcontact = array("url" => $profile_url,
1902                                         "name" => $name,
1903                                         "network" => $network,
1904                                         "photo" => $profile_photo,
1905                                         "about" => $about,
1906                                         "location" => $location,
1907                                         "gender" => $gender,
1908                                         "keywords" => $keywords,
1909                                         "connect" => $connect_url,
1910                                         "updated" => $updated,
1911                                         "contact-type" => $contact_type,
1912                                         "generation" => $generation);
1913
1914                         try {
1915                                 $gcontact = sanitize_gcontact($gcontact);
1916                                 update_gcontact($gcontact);
1917                         } catch (Exception $e) {
1918                                 logger($e->getMessage(), LOGGER_DEBUG);
1919                         }
1920
1921                         logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1922                 }
1923         }
1924         return $success;
1925 }
1926
1927 /**
1928  * @brief Removes unwanted parts from a contact url
1929  *
1930  * @param string $url Contact url
1931  * @return string Contact url with the wanted parts
1932  */
1933 function clean_contact_url($url) {
1934         $parts = parse_url($url);
1935
1936         if (!isset($parts["scheme"]) OR !isset($parts["host"]))
1937                 return $url;
1938
1939         $new_url = $parts["scheme"]."://".$parts["host"];
1940
1941         if (isset($parts["port"]))
1942                 $new_url .= ":".$parts["port"];
1943
1944         if (isset($parts["path"]))
1945                 $new_url .= $parts["path"];
1946
1947         if ($new_url != $url)
1948                 logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".App::callstack(), LOGGER_DEBUG);
1949
1950         return $new_url;
1951 }
1952
1953 /**
1954  * @brief Replace alternate OStatus user format with the primary one
1955  *
1956  * @param arr $contact contact array (called by reference)
1957  */
1958 function fix_alternate_contact_address(&$contact) {
1959         if (($contact["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($contact["url"])) {
1960                 $data = probe_url($contact["url"]);
1961                 if ($contact["network"] == NETWORK_OSTATUS) {
1962                         logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1963                         $contact["url"] = $data["url"];
1964                         $contact["addr"] = $data["addr"];
1965                         $contact["alias"] = $data["alias"];
1966                         $contact["server_url"] = $data["baseurl"];
1967                 }
1968         }
1969 }
1970
1971 /**
1972  * @brief Fetch the gcontact id, add an entry if not existed
1973  *
1974  * @param arr $contact contact array
1975  * @return bool|int Returns false if not found, integer if contact was found
1976  */
1977 function get_gcontact_id($contact) {
1978
1979         $gcontact_id = 0;
1980         $doprobing = false;
1981
1982         if (in_array($contact["network"], array(NETWORK_PHANTOM))) {
1983                 logger("Invalid network for contact url ".$contact["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1984                 return false;
1985         }
1986
1987         if ($contact["network"] == NETWORK_STATUSNET)
1988                 $contact["network"] = NETWORK_OSTATUS;
1989
1990         // All new contacts are hidden by default
1991         if (!isset($contact["hide"]))
1992                 $contact["hide"] = true;
1993
1994         // Replace alternate OStatus user format with the primary one
1995         fix_alternate_contact_address($contact);
1996
1997         // Remove unwanted parts from the contact url (e.g. "?zrl=...")
1998         if (in_array($contact["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)))
1999                 $contact["url"] = clean_contact_url($contact["url"]);
2000
2001         $r = q("SELECT `id`, `last_contact`, `last_failure`, `network` FROM `gcontact` WHERE `nurl` = '%s' LIMIT 2",
2002                 dbesc(normalise_link($contact["url"])));
2003
2004         if ($r) {
2005                 $gcontact_id = $r[0]["id"];
2006
2007                 // Update every 90 days
2008                 if (in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
2009                         $last_failure_str = $r[0]["last_failure"];
2010                         $last_failure = strtotime($r[0]["last_failure"]);
2011                         $last_contact_str = $r[0]["last_contact"];
2012                         $last_contact = strtotime($r[0]["last_contact"]);
2013                         $doprobing = (((time() - $last_contact) > (90 * 86400)) AND ((time() - $last_failure) > (90 * 86400)));
2014                 }
2015         } else {
2016                 q("INSERT INTO `gcontact` (`name`, `nick`, `addr` , `network`, `url`, `nurl`, `photo`, `created`, `updated`, `location`, `about`, `hide`, `generation`)
2017                         VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d)",
2018                         dbesc($contact["name"]),
2019                         dbesc($contact["nick"]),
2020                         dbesc($contact["addr"]),
2021                         dbesc($contact["network"]),
2022                         dbesc($contact["url"]),
2023                         dbesc(normalise_link($contact["url"])),
2024                         dbesc($contact["photo"]),
2025                         dbesc(datetime_convert()),
2026                         dbesc(datetime_convert()),
2027                         dbesc($contact["location"]),
2028                         dbesc($contact["about"]),
2029                         intval($contact["hide"]),
2030                         intval($contact["generation"])
2031                 );
2032
2033                 $r = q("SELECT `id`, `network` FROM `gcontact` WHERE `nurl` = '%s' ORDER BY `id` LIMIT 2",
2034                         dbesc(normalise_link($contact["url"])));
2035
2036                 if ($r) {
2037                         $gcontact_id = $r[0]["id"];
2038
2039                         $doprobing = in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""));
2040                 }
2041         }
2042
2043         if ($doprobing) {
2044                 logger("Last Contact: ". $last_contact_str." - Last Failure: ".$last_failure_str." - Checking: ".$contact["url"], LOGGER_DEBUG);
2045                 proc_run(PRIORITY_LOW, 'include/gprobe.php', bin2hex($contact["url"]));
2046         }
2047
2048         if ((dbm::is_result($r)) AND (count($r) > 1) AND ($gcontact_id > 0) AND ($contact["url"] != ""))
2049          q("DELETE FROM `gcontact` WHERE `nurl` = '%s' AND `id` != %d",
2050                 dbesc(normalise_link($contact["url"])),
2051                 intval($gcontact_id));
2052
2053         return $gcontact_id;
2054 }
2055
2056 /**
2057  * @brief Updates the gcontact table from a given array
2058  *
2059  * @param arr $contact contact array
2060  * @return bool|int Returns false if not found, integer if contact was found
2061  */
2062 function update_gcontact($contact) {
2063
2064         // Check for invalid "contact-type" value
2065         if (isset($contact['contact-type']) AND (intval($contact['contact-type']) < 0)) {
2066                 $contact['contact-type'] = 0;
2067         }
2068
2069         /// @todo update contact table as well
2070
2071         $gcontact_id = get_gcontact_id($contact);
2072
2073         if (!$gcontact_id)
2074                 return false;
2075
2076         $r = q("SELECT `name`, `nick`, `photo`, `location`, `about`, `addr`, `generation`, `birthday`, `gender`, `keywords`,
2077                         `contact-type`, `hide`, `nsfw`, `network`, `alias`, `notify`, `server_url`, `connect`, `updated`, `url`
2078                 FROM `gcontact` WHERE `id` = %d LIMIT 1",
2079                 intval($gcontact_id));
2080
2081         // Get all field names
2082         $fields = array();
2083         foreach ($r[0] AS $field => $data)
2084                 $fields[$field] = $data;
2085
2086         unset($fields["url"]);
2087         unset($fields["updated"]);
2088         unset($fields["hide"]);
2089
2090         // Bugfix: We had an error in the storing of keywords which lead to the "0"
2091         // This value is still transmitted via poco.
2092         if ($contact["keywords"] == "0")
2093                 unset($contact["keywords"]);
2094
2095         if ($r[0]["keywords"] == "0")
2096                 $r[0]["keywords"] = "";
2097
2098         // assign all unassigned fields from the database entry
2099         foreach ($fields AS $field => $data)
2100                 if (!isset($contact[$field]) OR ($contact[$field] == ""))
2101                         $contact[$field] = $r[0][$field];
2102
2103         if (!isset($contact["hide"]))
2104                 $contact["hide"] = $r[0]["hide"];
2105
2106         $fields["hide"] = $r[0]["hide"];
2107
2108         if ($contact["network"] == NETWORK_STATUSNET)
2109                 $contact["network"] = NETWORK_OSTATUS;
2110
2111         // Replace alternate OStatus user format with the primary one
2112         fix_alternate_contact_address($contact);
2113
2114         if (!isset($contact["updated"]))
2115                 $contact["updated"] = dbm::date();
2116
2117         if ($contact["server_url"] == "") {
2118                 $server_url = $contact["url"];
2119
2120                 $server_url = matching_url($server_url, $contact["alias"]);
2121                 if ($server_url != "")
2122                         $contact["server_url"] = $server_url;
2123
2124                 $server_url = matching_url($server_url, $contact["photo"]);
2125                 if ($server_url != "")
2126                         $contact["server_url"] = $server_url;
2127
2128                 $server_url = matching_url($server_url, $contact["notify"]);
2129                 if ($server_url != "")
2130                         $contact["server_url"] = $server_url;
2131         } else
2132                 $contact["server_url"] = normalise_link($contact["server_url"]);
2133
2134         if (($contact["addr"] == "") AND ($contact["server_url"] != "") AND ($contact["nick"] != "")) {
2135                 $hostname = str_replace("http://", "", $contact["server_url"]);
2136                 $contact["addr"] = $contact["nick"]."@".$hostname;
2137         }
2138
2139         // Check if any field changed
2140         $update = false;
2141         unset($fields["generation"]);
2142
2143         if ((($contact["generation"] > 0) AND ($contact["generation"] <= $r[0]["generation"])) OR ($r[0]["generation"] == 0)) {
2144                 foreach ($fields AS $field => $data)
2145                         if ($contact[$field] != $r[0][$field]) {
2146                                 logger("Difference for contact ".$contact["url"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
2147                                 $update = true;
2148                         }
2149
2150                 if ($contact["generation"] < $r[0]["generation"]) {
2151                         logger("Difference for contact ".$contact["url"]." in field 'generation'. new value: '".$contact["generation"]."', old value '".$r[0]["generation"]."'", LOGGER_DEBUG);
2152                         $update = true;
2153                 }
2154         }
2155
2156         if ($update) {
2157                 logger("Update gcontact for ".$contact["url"], LOGGER_DEBUG);
2158
2159                 q("UPDATE `gcontact` SET `photo` = '%s', `name` = '%s', `nick` = '%s', `addr` = '%s', `network` = '%s',
2160                                         `birthday` = '%s', `gender` = '%s', `keywords` = '%s', `hide` = %d, `nsfw` = %d,
2161                                         `contact-type` = %d, `alias` = '%s', `notify` = '%s', `url` = '%s',
2162                                         `location` = '%s', `about` = '%s', `generation` = %d, `updated` = '%s',
2163                                         `server_url` = '%s', `connect` = '%s'
2164                                 WHERE `nurl` = '%s' AND (`generation` = 0 OR `generation` >= %d)",
2165                         dbesc($contact["photo"]), dbesc($contact["name"]), dbesc($contact["nick"]),
2166                         dbesc($contact["addr"]), dbesc($contact["network"]), dbesc($contact["birthday"]),
2167                         dbesc($contact["gender"]), dbesc($contact["keywords"]), intval($contact["hide"]),
2168                         intval($contact["nsfw"]), intval($contact["contact-type"]), dbesc($contact["alias"]),
2169                         dbesc($contact["notify"]), dbesc($contact["url"]), dbesc($contact["location"]),
2170                         dbesc($contact["about"]), intval($contact["generation"]), dbesc(dbm::date($contact["updated"])),
2171                         dbesc($contact["server_url"]), dbesc($contact["connect"]),
2172                         dbesc(normalise_link($contact["url"])), intval($contact["generation"]));
2173
2174
2175                 // Now update the contact entry with the user id "0" as well.
2176                 // This is used for the shadow copies of public items.
2177                 $r = q("SELECT `id` FROM `contact` WHERE `nurl` = '%s' AND `uid` = 0 ORDER BY `id` LIMIT 1",
2178                         dbesc(normalise_link($contact["url"])));
2179
2180                 if ($r) {
2181                         logger("Update shadow contact ".$r[0]["id"], LOGGER_DEBUG);
2182
2183                         update_contact_avatar($contact["photo"], 0, $r[0]["id"]);
2184
2185                         q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s',
2186                                                 `network` = '%s', `bd` = '%s', `gender` = '%s',
2187                                                 `keywords` = '%s', `alias` = '%s', `contact-type` = %d,
2188                                                 `url` = '%s', `location` = '%s', `about` = '%s'
2189                                         WHERE `id` = %d",
2190                                 dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["addr"]),
2191                                 dbesc($contact["network"]), dbesc($contact["birthday"]), dbesc($contact["gender"]),
2192                                 dbesc($contact["keywords"]), dbesc($contact["alias"]), intval($contact["contact-type"]),
2193                                 dbesc($contact["url"]), dbesc($contact["location"]), dbesc($contact["about"]),
2194                                 intval($r[0]["id"]));
2195                 }
2196         }
2197
2198         return $gcontact_id;
2199 }
2200
2201 /**
2202  * @brief Updates the gcontact entry from probe
2203  *
2204  * @param str $url profile link
2205  */
2206 function update_gcontact_from_probe($url) {
2207         $data = probe_url($url);
2208
2209         if (in_array($data["network"], array(NETWORK_PHANTOM))) {
2210                 logger("Invalid network for contact url ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
2211                 return;
2212         }
2213
2214         $data["server_url"] = $data["baseurl"];
2215
2216         update_gcontact($data);
2217 }
2218
2219 /**
2220  * @brief Update the gcontact entry for a given user id
2221  *
2222  * @param int $uid User ID
2223  */
2224 function update_gcontact_for_user($uid) {
2225         $r = q("SELECT `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
2226                         `profile`.`name`, `profile`.`about`, `profile`.`gender`,
2227                         `profile`.`pub_keywords`, `profile`.`dob`, `profile`.`photo`,
2228                         `profile`.`net-publish`, `user`.`nickname`, `user`.`hidewall`,
2229                         `contact`.`notify`, `contact`.`url`, `contact`.`addr`
2230                 FROM `profile`
2231                         INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
2232                         INNER JOIN `contact` ON `contact`.`uid` = `profile`.`uid`
2233                 WHERE `profile`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self`",
2234                 intval($uid));
2235
2236         $location = formatted_location(array("locality" => $r[0]["locality"], "region" => $r[0]["region"],
2237                                                 "country-name" => $r[0]["country-name"]));
2238
2239         // The "addr" field was added in 3.4.3 so it can be empty for older users
2240         if ($r[0]["addr"] != "")
2241                 $addr = $r[0]["nickname"].'@'.str_replace(array("http://", "https://"), "", App::get_baseurl());
2242         else
2243                 $addr = $r[0]["addr"];
2244
2245         $gcontact = array("name" => $r[0]["name"], "location" => $location, "about" => $r[0]["about"],
2246                         "gender" => $r[0]["gender"], "keywords" => $r[0]["pub_keywords"],
2247                         "birthday" => $r[0]["dob"], "photo" => $r[0]["photo"],
2248                         "notify" => $r[0]["notify"], "url" => $r[0]["url"],
2249                         "hide" => ($r[0]["hidewall"] OR !$r[0]["net-publish"]),
2250                         "nick" => $r[0]["nickname"], "addr" => $addr,
2251                         "connect" => $addr, "server_url" => App::get_baseurl(),
2252                         "generation" => 1, "network" => NETWORK_DFRN);
2253
2254         update_gcontact($gcontact);
2255 }
2256
2257 /**
2258  * @brief Fetches users of given GNU Social server
2259  *
2260  * If the "Statistics" plugin is enabled (See http://gstools.org/ for details) we query user data with this.
2261  *
2262  * @param str $server Server address
2263  */
2264 function gs_fetch_users($server) {
2265
2266         logger("Fetching users from GNU Social server ".$server, LOGGER_DEBUG);
2267
2268         $url = $server."/main/statistics";
2269
2270         $result = z_fetch_url($url);
2271         if (!$result["success"])
2272                 return false;
2273
2274         $statistics = json_decode($result["body"]);
2275
2276         if (is_object($statistics->config)) {
2277                 if ($statistics->config->instance_with_ssl)
2278                         $server = "https://";
2279                 else
2280                         $server = "http://";
2281
2282                 $server .= $statistics->config->instance_address;
2283
2284                 $hostname = $statistics->config->instance_address;
2285         } else {
2286                 if ($statistics->instance_with_ssl)
2287                         $server = "https://";
2288                 else
2289                         $server = "http://";
2290
2291                 $server .= $statistics->instance_address;
2292
2293                 $hostname = $statistics->instance_address;
2294         }
2295
2296         if (is_object($statistics->users))
2297                 foreach ($statistics->users AS $nick => $user) {
2298                         $profile_url = $server."/".$user->nickname;
2299
2300                         $contact = array("url" => $profile_url,
2301                                         "name" => $user->fullname,
2302                                         "addr" => $user->nickname."@".$hostname,
2303                                         "nick" => $user->nickname,
2304                                         "about" => $user->bio,
2305                                         "network" => NETWORK_OSTATUS,
2306                                         "photo" => App::get_baseurl()."/images/person-175.jpg");
2307                         get_gcontact_id($contact);
2308                 }
2309 }
2310
2311 /**
2312  * @brief Asking GNU Social server on a regular base for their user data
2313  *
2314  */
2315 function gs_discover() {
2316
2317         $requery_days = intval(get_config("system", "poco_requery_days"));
2318
2319         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
2320
2321         $r = q("SELECT `nurl`, `url` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `network` = '%s' AND `last_poco_query` < '%s' ORDER BY RAND() LIMIT 5",
2322                 dbesc(NETWORK_OSTATUS), dbesc($last_update));
2323
2324         if (!$r)
2325                 return;
2326
2327         foreach ($r AS $server) {
2328                 gs_fetch_users($server["url"]);
2329                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
2330         }
2331 }
2332
2333 /**
2334  * @brief Returns a list of all known servers
2335  * @return array List of server urls
2336  */
2337 function poco_serverlist() {
2338         $r = q("SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
2339                 WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
2340                 ORDER BY `last_contact`
2341                 LIMIT 1000",
2342                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA), dbesc(NETWORK_OSTATUS));
2343         if (!dbm::is_result($r)) {
2344                 return false;
2345         }
2346         return $r;
2347 }
2348 ?>