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 require_once('include/datetime.php');
  11 require_once("include/Scrape.php");
  12 require_once("include/network.php");
  13 require_once("include/html2bbcode.php");
  14 require_once("include/Contact.php");
  15 require_once("include/Photo.php");
  16
  17 /*
  18  * poco_load
  19  *
  20  * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  21  * and add the entries to the gcontact (Global Contact) table, or update existing entries
  22  * if anything (name or photo) has changed.
  23  * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  24  *
  25  * Once the global contact is stored add (if necessary) the contact linkage which associates
  26  * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  27  * pointing to the same global contact id.
  28  *
  29  */
  30
  31
  32
  33
  34 function poco_load($cid,$uid = 0,$zcid = 0,$url = null) {
  35
  36         $a = get_app();
  37
  38         if ($cid) {
  39                 if ((! $url) || (! $uid)) {
  40                         $r = q("select `poco`, `uid` from `contact` where `id` = %d limit 1",
  41                                 intval($cid)
  42                         );
  43                         if (dbm::is_result($r)) {
  44                                 $url = $r[0]['poco'];
  45                                 $uid = $r[0]['uid'];
  46                         }
  47                 }
  48                 if (! $uid)
  49                         return;
  50         }
  51
  52         if (! $url)
  53                 return;
  54
  55         $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') ;
  56
  57         logger('poco_load: ' . $url, LOGGER_DEBUG);
  58
  59         $s = fetch_url($url);
  60
  61         logger('poco_load: returns ' . $s, LOGGER_DATA);
  62
  63         logger('poco_load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);
  64
  65         if (($a->get_curl_code() > 299) || (! $s))
  66                 return;
  67
  68         $j = json_decode($s);
  69
  70         logger('poco_load: json: ' . print_r($j,true),LOGGER_DATA);
  71
  72         if (! isset($j->entry))
  73                 return;
  74
  75         $total = 0;
  76         foreach($j->entry as $entry) {
  77
  78                 $total ++;
  79                 $profile_url = '';
  80                 $profile_photo = '';
  81                 $connect_url = '';
  82                 $name = '';
  83                 $network = '';
  84                 $updated = '0000-00-00 00:00:00';
  85                 $location = '';
  86                 $about = '';
  87                 $keywords = '';
  88                 $gender = '';
  89                 $contact_type = -1;
  90                 $generation = 0;
  91
  92                 $name = $entry->displayName;
  93
  94                 if (isset($entry->urls)) {
  95                         foreach ($entry->urls as $url) {
  96                                 if ($url->type == 'profile') {
  97                                         $profile_url = $url->value;
  98                                         continue;
  99                                 }
 100                                 if ($url->type == 'webfinger') {
 101                                         $connect_url = str_replace('acct:' , '', $url->value);
 102                                         continue;
 103                                 }
 104                         }
 105                 }
 106                 if (isset($entry->photos)) {
 107                         foreach ($entry->photos as $photo) {
 108                                 if ($photo->type == 'profile') {
 109                                         $profile_photo = $photo->value;
 110                                         continue;
 111                                 }
 112                         }
 113                 }
 114
 115                 if (isset($entry->updated)) {
 116                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
 117                 }
 118
 119                 if (isset($entry->network)) {
 120                         $network = $entry->network;
 121                 }
 122
 123                 if (isset($entry->currentLocation)) {
 124                         $location = $entry->currentLocation;
 125                 }
 126
 127                 if (isset($entry->aboutMe)) {
 128                         $about = html2bbcode($entry->aboutMe);
 129                 }
 130
 131                 if (isset($entry->gender)) {
 132                         $gender = $entry->gender;
 133                 }
 134
 135                 if (isset($entry->generation) AND ($entry->generation > 0)) {
 136                         $generation = ++$entry->generation;
 137                 }
 138
 139                 if (isset($entry->tags)) {
 140                         foreach($entry->tags as $tag) {
 141                                 $keywords = implode(", ", $tag);
 142                         }
 143                 }
 144
 145                 if (isset($entry->contactType) AND ($entry->contactType >= 0))
 146                         $contact_type = $entry->contactType;
 147
 148                 // If you query a Friendica server for its profiles, the network has to be Friendica
 149                 /// TODO It could also be a Redmatrix server
 150                 //if ($uid == 0)
 151                 //      $network = NETWORK_DFRN;
 152
 153                 poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, $cid, $uid, $zcid);
 154
 155                 $gcontact = array("url" => $profile_url, "contact-type" => $contact_type, "generation" => $generation);
 156                 update_gcontact($gcontact);
 157
 158                 // Update the Friendica contacts. Diaspora is doing it via a message. (See include/diaspora.php)
 159                 // Deactivated because we now update Friendica contacts in dfrn.php
 160                 //if (($location != "") OR ($about != "") OR ($keywords != "") OR ($gender != ""))
 161                 //      q("UPDATE `contact` SET `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s'
 162                 //              WHERE `nurl` = '%s' AND NOT `self` AND `network` = '%s'",
 163                 //              dbesc($location),
 164                 //              dbesc($about),
 165                 //              dbesc($keywords),
 166                 //              dbesc($gender),
 167                 //              dbesc(normalise_link($profile_url)),
 168                 //              dbesc(NETWORK_DFRN));
 169         }
 170         logger("poco_load: loaded $total entries",LOGGER_DEBUG);
 171
 172         q("DELETE FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `zcid` = %d AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY",
 173                 intval($cid),
 174                 intval($uid),
 175                 intval($zcid)
 176         );
 177
 178 }
 179
 180 function poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, $cid = 0, $uid = 0, $zcid = 0) {
 181
 182         // Generation:
 183         //  0: No definition
 184         //  1: Profiles on this server
 185         //  2: Contacts of profiles on this server
 186         //  3: Contacts of contacts of profiles on this server
 187         //  4: ...
 188
 189         $gcid = "";
 190
 191         if ($profile_url == "")
 192                 return $gcid;
 193
 194         $urlparts = parse_url($profile_url);
 195         if (!isset($urlparts["scheme"]))
 196                 return $gcid;
 197
 198         if (in_array($urlparts["host"], array("www.facebook.com", "facebook.com", "twitter.com",
 199                                                 "identi.ca", "alpha.app.net")))
 200                 return $gcid;
 201
 202         // Don't store the statusnet connector as network
 203         // We can't simply set this to NETWORK_OSTATUS since the connector could have fetched posts from friendica as well
 204         if ($network == NETWORK_STATUSNET)
 205                 $network = "";
 206
 207         // Assure that there are no parameter fragments in the profile url
 208         if (in_array($network, array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, "")))
 209                 $profile_url = clean_contact_url($profile_url);
 210
 211         $alternate = poco_alternate_ostatus_url($profile_url);
 212
 213         $orig_updated = $updated;
 214
 215         // The global contacts should contain the original picture, not the cached one
 216         if (($generation != 1) AND stristr(normalise_link($profile_photo), normalise_link(App::get_baseurl()."/photo/"))) {
 217                 $profile_photo = "";
 218         }
 219
 220         $r = q("SELECT `network` FROM `contact` WHERE `nurl` = '%s' AND `network` != '' AND `network` != '%s' LIMIT 1",
 221                 dbesc(normalise_link($profile_url)), dbesc(NETWORK_STATUSNET)
 222         );
 223         if (dbm::is_result($r)) {
 224                 $network = $r[0]["network"];
 225         }
 226
 227         if (($network == "") OR ($network == NETWORK_OSTATUS)) {
 228                 $r = q("SELECT `network`, `url` FROM `contact` WHERE `alias` IN ('%s', '%s') AND `network` != '' AND `network` != '%s' LIMIT 1",
 229                         dbesc($profile_url), dbesc(normalise_link($profile_url)), dbesc(NETWORK_STATUSNET)
 230                 );
 231                 if (dbm::is_result($r)) {
 232                         $network = $r[0]["network"];
 233                         //$profile_url = $r[0]["url"];
 234                 }
 235         }
 236
 237         $x = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
 238                 dbesc(normalise_link($profile_url))
 239         );
 240
 241         if (count($x)) {
 242                 if (($network == "") AND ($x[0]["network"] != NETWORK_STATUSNET))
 243                         $network = $x[0]["network"];
 244
 245                 if ($updated == "0000-00-00 00:00:00")
 246                         $updated = $x[0]["updated"];
 247
 248                 $created = $x[0]["created"];
 249                 $server_url = $x[0]["server_url"];
 250                 $nick = $x[0]["nick"];
 251                 $addr = $x[0]["addr"];
 252                 $alias =  $x[0]["alias"];
 253                 $notify =  $x[0]["notify"];
 254         } else {
 255                 $created = "0000-00-00 00:00:00";
 256                 $server_url = "";
 257
 258                 $urlparts = parse_url($profile_url);
 259                 $nick = end(explode("/", $urlparts["path"]));
 260                 $addr = "";
 261                 $alias = "";
 262                 $notify = "";
 263         }
 264
 265         if ((($network == "") OR ($name == "") OR ($addr == "") OR ($profile_photo == "") OR ($server_url == "") OR $alternate)
 266                 AND poco_reachable($profile_url, $server_url, $network, false)) {
 267                 $data = probe_url($profile_url);
 268
 269                 $orig_profile = $profile_url;
 270
 271                 $network = $data["network"];
 272                 $name = $data["name"];
 273                 $nick = $data["nick"];
 274                 $addr = $data["addr"];
 275                 $alias = $data["alias"];
 276                 $notify = $data["notify"];
 277                 $profile_url = $data["url"];
 278                 $profile_photo = $data["photo"];
 279                 $server_url = $data["baseurl"];
 280
 281                 if ($alternate AND ($network == NETWORK_OSTATUS)) {
 282                         // Delete the old entry - if it exists
 283                         $r = q("SELECT `id` FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 284                         if ($r) {
 285                                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 286                                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($r[0]["id"]));
 287                         }
 288
 289                         // possibly create a new entry
 290                         poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, $cid, $uid, $zcid);
 291                 }
 292         }
 293
 294         if ($alternate AND ($network == NETWORK_OSTATUS))
 295                 return $gcid;
 296
 297         if (count($x) AND ($x[0]["network"] == "") AND ($network != "")) {
 298                 q("UPDATE `gcontact` SET `network` = '%s' WHERE `nurl` = '%s'",
 299                         dbesc($network),
 300                         dbesc(normalise_link($profile_url))
 301                 );
 302         }
 303
 304         if (($name == "") OR ($profile_photo == ""))
 305                 return $gcid;
 306
 307         if (!in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS, NETWORK_DIASPORA)))
 308                 return $gcid;
 309
 310         logger("profile-check generation: ".$generation." Network: ".$network." URL: ".$profile_url." name: ".$name." avatar: ".$profile_photo, LOGGER_DEBUG);
 311
 312         // We check the server url to be sure that it is a real one
 313         $server_url2 = poco_detect_server($profile_url);
 314
 315         // We are no sure that it is a correct URL. So we use it in the future
 316         if ($server_url2 != "") {
 317                 $server_url = $server_url2;
 318         }
 319
 320         // The server URL doesn't seem to be valid, so we don't store it.
 321         if (!poco_check_server($server_url, $network)) {
 322                 $server_url = "";
 323         }
 324
 325         $gcontact = array("url" => $profile_url,
 326                         "addr" => $addr,
 327                         "alias" => $alias,
 328                         "name" => $name,
 329                         "network" => $network,
 330                         "photo" => $profile_photo,
 331                         "about" => $about,
 332                         "location" => $location,
 333                         "gender" => $gender,
 334                         "keywords" => $keywords,
 335                         "server_url" => $server_url,
 336                         "connect" => $connect_url,
 337                         "notify" => $notify,
 338                         "updated" => $updated,
 339                         "generation" => $generation);
 340
 341         $gcid = update_gcontact($gcontact);
 342
 343         if (!$gcid)
 344                 return $gcid;
 345
 346         $r = q("SELECT * FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d LIMIT 1",
 347                 intval($cid),
 348                 intval($uid),
 349                 intval($gcid),
 350                 intval($zcid)
 351         );
 352         if (! dbm::is_result($r)) {
 353                 q("INSERT INTO `glink` (`cid`,`uid`,`gcid`,`zcid`, `updated`) VALUES (%d,%d,%d,%d, '%s') ",
 354                         intval($cid),
 355                         intval($uid),
 356                         intval($gcid),
 357                         intval($zcid),
 358                         dbesc(datetime_convert())
 359                 );
 360         } else {
 361                 q("UPDATE `glink` SET `updated` = '%s' WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d",
 362                         dbesc(datetime_convert()),
 363                         intval($cid),
 364                         intval($uid),
 365                         intval($gcid),
 366                         intval($zcid)
 367                 );
 368         }
 369
 370         return $gcid;
 371 }
 372
 373 function poco_reachable($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 ($gcontacts[0]["created"] == "0000-00-00 00:00:00")
 469                 q("UPDATE `gcontact` SET `created` = '%s' WHERE `nurl` = '%s'",
 470                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 471
 472         if ($gcontacts[0]["server_url"] != "") {
 473                 $server_url = $gcontacts[0]["server_url"];
 474         }
 475         if (($server_url == '') OR ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"])) {
 476                 $server_url = poco_detect_server($profile);
 477         }
 478
 479         if (!in_array($gcontacts[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_FEED, NETWORK_OSTATUS, ""))) {
 480                 logger("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", LOGGER_DEBUG);
 481                 return false;
 482         }
 483
 484         if ($server_url != "") {
 485                 if (!poco_check_server($server_url, $gcontacts[0]["network"], $force)) {
 486
 487                         if ($force)
 488                                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 489                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 490
 491                         logger("Profile ".$profile.": Server ".$server_url." wasn't reachable.", LOGGER_DEBUG);
 492                         return false;
 493                 }
 494
 495                 q("UPDATE `gcontact` SET `server_url` = '%s' WHERE `nurl` = '%s'",
 496                         dbesc($server_url), dbesc(normalise_link($profile)));
 497         }
 498
 499         if (in_array($gcontacts[0]["network"], array("", NETWORK_FEED))) {
 500                 $server = q("SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 501                         dbesc(normalise_link($server_url)));
 502
 503                 if ($server)
 504                         q("UPDATE `gcontact` SET `network` = '%s' WHERE `nurl` = '%s'",
 505                                 dbesc($server[0]["network"]), dbesc(normalise_link($profile)));
 506                 else
 507                         return false;
 508         }
 509
 510         // noscrape is really fast so we don't cache the call.
 511         if (($gcontacts[0]["server_url"] != "") AND ($gcontacts[0]["nick"] != "")) {
 512
 513                 //  Use noscrape if possible
 514                 $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($gcontacts[0]["server_url"])));
 515
 516                 if ($server) {
 517                         $noscraperet = z_fetch_url($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 518
 519                          if ($noscraperet["success"] AND ($noscraperet["body"] != "")) {
 520
 521                                 $noscrape = json_decode($noscraperet["body"], true);
 522
 523                                 if (is_array($noscrape)) {
 524                                         $contact = array("url" => $profile,
 525                                                         "network" => $server[0]["network"],
 526                                                         "generation" => $gcontacts[0]["generation"]);
 527
 528                                         if (isset($noscrape["fn"]))
 529                                                 $contact["name"] = $noscrape["fn"];
 530
 531                                         if (isset($noscrape["comm"]))
 532                                                 $contact["community"] = $noscrape["comm"];
 533
 534                                         if (isset($noscrape["tags"])) {
 535                                                 $keywords = implode(" ", $noscrape["tags"]);
 536                                                 if ($keywords != "")
 537                                                         $contact["keywords"] = $keywords;
 538                                         }
 539
 540                                         $location = formatted_location($noscrape);
 541                                         if ($location)
 542                                                 $contact["location"] = $location;
 543
 544                                         if (isset($noscrape["dfrn-notify"]))
 545                                                 $contact["notify"] = $noscrape["dfrn-notify"];
 546
 547                                         // Remove all fields that are not present in the gcontact table
 548                                         unset($noscrape["fn"]);
 549                                         unset($noscrape["key"]);
 550                                         unset($noscrape["homepage"]);
 551                                         unset($noscrape["comm"]);
 552                                         unset($noscrape["tags"]);
 553                                         unset($noscrape["locality"]);
 554                                         unset($noscrape["region"]);
 555                                         unset($noscrape["country-name"]);
 556                                         unset($noscrape["contacts"]);
 557                                         unset($noscrape["dfrn-request"]);
 558                                         unset($noscrape["dfrn-confirm"]);
 559                                         unset($noscrape["dfrn-notify"]);
 560                                         unset($noscrape["dfrn-poll"]);
 561
 562                                         // Set the date of the last contact
 563                                         /// @todo By now the function "update_gcontact" doesn't work with this field
 564                                         //$contact["last_contact"] = datetime_convert();
 565
 566                                         $contact = array_merge($contact, $noscrape);
 567
 568                                         update_gcontact($contact);
 569
 570                                         if (trim($noscrape["updated"]) != "") {
 571                                                 q("UPDATE `gcontact` SET `last_contact` = '%s' WHERE `nurl` = '%s'",
 572                                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 573
 574                                                 logger("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", LOGGER_DEBUG);
 575
 576                                                 return $noscrape["updated"];
 577                                         }
 578                                 }
 579                         }
 580                 }
 581         }
 582
 583         // If we only can poll the feed, then we only do this once a while
 584         if (!$force AND !poco_do_update($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"],  $gcontacts[0]["last_contact"])) {
 585                 logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 586                 return $gcontacts[0]["updated"];
 587         }
 588
 589         $data = probe_url($profile);
 590
 591         // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 592         // Then check the other link and delete this one
 593         if (($data["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($profile) AND
 594                 (normalise_link($profile) == normalise_link($data["alias"])) AND
 595                 (normalise_link($profile) != normalise_link($data["url"]))) {
 596
 597                 // Delete the old entry
 598                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($profile)));
 599                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($gcontacts[0]["id"]));
 600
 601                 poco_check($data["url"], $data["name"], $data["network"], $data["photo"], $gcontacts[0]["about"], $gcontacts[0]["location"],
 602                                 $gcontacts[0]["gender"], $gcontacts[0]["keywords"], $data["addr"], $gcontacts[0]["updated"], $gcontacts[0]["generation"]);
 603
 604                 poco_last_updated($data["url"], $force);
 605
 606                 logger("Profile ".$profile." was deleted", LOGGER_DEBUG);
 607                 return false;
 608         }
 609
 610         if (($data["poll"] == "") OR (in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
 611                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 612                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 613
 614                 logger("Profile ".$profile." wasn't reachable (profile)", LOGGER_DEBUG);
 615                 return false;
 616         }
 617
 618         $contact = array("generation" => $gcontacts[0]["generation"]);
 619
 620         $contact = array_merge($contact, $data);
 621
 622         $contact["server_url"] = $data["baseurl"];
 623
 624         unset($contact["batch"]);
 625         unset($contact["poll"]);
 626         unset($contact["request"]);
 627         unset($contact["confirm"]);
 628         unset($contact["poco"]);
 629         unset($contact["priority"]);
 630         unset($contact["pubkey"]);
 631         unset($contact["baseurl"]);
 632
 633         update_gcontact($contact);
 634
 635         $feedret = z_fetch_url($data["poll"]);
 636
 637         if (!$feedret["success"]) {
 638                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 639                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 640
 641                 logger("Profile ".$profile." wasn't reachable (no feed)", LOGGER_DEBUG);
 642                 return false;
 643         }
 644
 645         $doc = new DOMDocument();
 646         @$doc->loadXML($feedret["body"]);
 647
 648         $xpath = new DomXPath($doc);
 649         $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 650
 651         $entries = $xpath->query('/atom:feed/atom:entry');
 652
 653         $last_updated = "";
 654
 655         foreach ($entries AS $entry) {
 656                 $published = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 657                 $updated = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 658
 659                 if ($last_updated < $published)
 660                         $last_updated = $published;
 661
 662                 if ($last_updated < $updated)
 663                         $last_updated = $updated;
 664         }
 665
 666         // Maybe there aren't any entries. Then check if it is a valid feed
 667         if ($last_updated == "")
 668                 if ($xpath->query('/atom:feed')->length > 0)
 669                         $last_updated = "0000-00-00 00:00:00";
 670
 671         q("UPDATE `gcontact` SET `updated` = '%s', `last_contact` = '%s' WHERE `nurl` = '%s'",
 672                 dbesc(dbm::date($last_updated)), dbesc(dbm::date()), dbesc(normalise_link($profile)));
 673
 674         if (($gcontacts[0]["generation"] == 0))
 675                 q("UPDATE `gcontact` SET `generation` = 9 WHERE `nurl` = '%s'",
 676                         dbesc(normalise_link($profile)));
 677
 678         logger("Profile ".$profile." was last updated at ".$last_updated, LOGGER_DEBUG);
 679
 680         return($last_updated);
 681 }
 682
 683 function poco_do_update($created, $updated, $last_failure,  $last_contact) {
 684         $now = strtotime(datetime_convert());
 685
 686         if ($updated > $last_contact)
 687                 $contact_time = strtotime($updated);
 688         else
 689                 $contact_time = strtotime($last_contact);
 690
 691         $failure_time = strtotime($last_failure);
 692         $created_time = strtotime($created);
 693
 694         // If there is no "created" time then use the current time
 695         if ($created_time <= 0)
 696                 $created_time = $now;
 697
 698         // If the last contact was less than 24 hours then don't update
 699         if (($now - $contact_time) < (60 * 60 * 24))
 700                 return false;
 701
 702         // If the last failure was less than 24 hours then don't update
 703         if (($now - $failure_time) < (60 * 60 * 24))
 704                 return false;
 705
 706         // If the last contact was less than a week ago and the last failure is older than a week then don't update
 707         //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) AND ($contact_time > $failure_time))
 708         //      return false;
 709
 710         // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 711         if ((($now - $contact_time) > (60 * 60 * 24 * 7)) AND (($now - $created_time) > (60 * 60 * 24 * 7)) AND (($now - $failure_time) < (60 * 60 * 24 * 7)))
 712                 return false;
 713
 714         // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 715         if ((($now - $contact_time) > (60 * 60 * 24 * 30)) AND (($now - $created_time) > (60 * 60 * 24 * 30)) AND (($now - $failure_time) < (60 * 60 * 24 * 30)))
 716                 return false;
 717
 718         return true;
 719 }
 720
 721 function poco_to_boolean($val) {
 722         if (($val == "true") OR ($val == 1))
 723                 return(true);
 724         if (($val == "false") OR ($val == 0))
 725                 return(false);
 726
 727         return ($val);
 728 }
 729
 730 /**
 731  * @brief Detect server type (Hubzilla or Friendica) via the poco data
 732  *
 733  * @param object $data POCO data
 734  * @return array Server data
 735  */
 736 function poco_detect_poco_data($data) {
 737         $server = false;
 738
 739         if (!isset($data->entry)) {
 740                 return false;
 741         }
 742
 743         if (count($data->entry) == 0) {
 744                 return false;
 745         }
 746
 747         if (!isset($data->entry[0]->urls)) {
 748                 return false;
 749         }
 750
 751         if (count($data->entry[0]->urls) == 0) {
 752                 return false;
 753         }
 754
 755         foreach ($data->entry[0]->urls AS $url) {
 756                 if ($url->type == 'zot') {
 757                         $server = array();
 758                         $server["platform"] = 'Hubzilla';
 759                         $server["network"] = NETWORK_DIASPORA;
 760                         return $server;
 761                 }
 762         }
 763         return false;
 764 }
 765
 766 /**
 767  * @brief Detect server type by using the nodeinfo data
 768  *
 769  * @param string $server_url address of the server
 770  * @return array Server data
 771  */
 772 function poco_fetch_nodeinfo($server_url) {
 773         $serverret = z_fetch_url($server_url."/.well-known/nodeinfo");
 774         if (!$serverret["success"]) {
 775                 return false;
 776         }
 777
 778         $nodeinfo = json_decode($serverret['body']);
 779
 780         if (!is_object($nodeinfo)) {
 781                 return false;
 782         }
 783
 784         if (!is_array($nodeinfo->links)) {
 785                 return false;
 786         }
 787
 788         $nodeinfo_url = '';
 789
 790         foreach ($nodeinfo->links AS $link) {
 791                 if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
 792                         $nodeinfo_url = $link->href;
 793                 }
 794         }
 795
 796         if ($nodeinfo_url == '') {
 797                 return false;
 798         }
 799
 800         $serverret = z_fetch_url($nodeinfo_url);
 801         if (!$serverret["success"]) {
 802                 return false;
 803         }
 804
 805         $nodeinfo = json_decode($serverret['body']);
 806
 807         if (!is_object($nodeinfo)) {
 808                 return false;
 809         }
 810
 811         $server = array();
 812
 813         $server['register_policy'] = REGISTER_CLOSED;
 814
 815         if (is_bool($nodeinfo->openRegistrations) AND $nodeinfo->openRegistrations) {
 816                 $server['register_policy'] = REGISTER_OPEN;
 817         }
 818
 819         if (is_object($nodeinfo->software)) {
 820                 if (isset($nodeinfo->software->name)) {
 821                         $server['platform'] = $nodeinfo->software->name;
 822                 }
 823
 824                 if (isset($nodeinfo->software->version)) {
 825                         $server['version'] = $nodeinfo->software->version;
 826                         // Version numbers on Nodeinfo are presented with additional info, e.g.:
 827                         // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 828                         $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 829                 }
 830         }
 831
 832         if (is_object($nodeinfo->metadata)) {
 833                 if (isset($nodeinfo->metadata->nodeName)) {
 834                         $server['site_name'] = $nodeinfo->metadata->nodeName;
 835                 }
 836         }
 837
 838         $diaspora = false;
 839         $friendica = false;
 840         $gnusocial = false;
 841
 842         if (is_array($nodeinfo->protocols->inbound)) {
 843                 foreach ($nodeinfo->protocols->inbound AS $inbound) {
 844                         if ($inbound == 'diaspora') {
 845                                 $diaspora = true;
 846                         }
 847                         if ($inbound == 'friendica') {
 848                                 $friendica = true;
 849                         }
 850                         if ($inbound == 'gnusocial') {
 851                                 $gnusocial = true;
 852                         }
 853                 }
 854         }
 855
 856         if ($gnusocial) {
 857                 $server['network'] = NETWORK_OSTATUS;
 858         }
 859         if ($diaspora) {
 860                 $server['network'] = NETWORK_DIASPORA;
 861         }
 862         if ($friendica) {
 863                 $server['network'] = NETWORK_DFRN;
 864         }
 865
 866         if (!$server) {
 867                 return false;
 868         }
 869
 870         return $server;
 871 }
 872
 873 /**
 874  * @brief Detect server type (Hubzilla or Friendica) via the front page body
 875  *
 876  * @param string $body Front page of the server
 877  * @return array Server data
 878  */
 879 function poco_detect_server_type($body) {
 880         $server = false;
 881
 882         $doc = new \DOMDocument();
 883         @$doc->loadHTML($body);
 884         $xpath = new \DomXPath($doc);
 885
 886         $list = $xpath->query("//meta[@name]");
 887
 888         foreach ($list as $node) {
 889                 $attr = array();
 890                 if ($node->attributes->length) {
 891                         foreach ($node->attributes as $attribute) {
 892                                 $attr[$attribute->name] = $attribute->value;
 893                         }
 894                 }
 895                 if ($attr['name'] == 'generator') {
 896                         $version_part = explode(" ", $attr['content']);
 897                         if (count($version_part) == 2) {
 898                                 if (in_array($version_part[0], array("Friendika", "Friendica"))) {
 899                                         $server = array();
 900                                         $server["platform"] = $version_part[0];
 901                                         $server["version"] = $version_part[1];
 902                                         $server["network"] = NETWORK_DFRN;
 903                                 }
 904                         }
 905                 }
 906         }
 907
 908         if (!$server) {
 909                 $list = $xpath->query("//meta[@property]");
 910
 911                 foreach ($list as $node) {
 912                         $attr = array();
 913                         if ($node->attributes->length) {
 914                                 foreach ($node->attributes as $attribute) {
 915                                         $attr[$attribute->name] = $attribute->value;
 916                                 }
 917                         }
 918                         if ($attr['property'] == 'generator') {
 919                                 if (in_array($attr['content'], array("hubzilla", "BlaBlaNet"))) {
 920                                         $server = array();
 921                                         $server["platform"] = $attr['content'];
 922                                         $server["version"] = "";
 923                                         $server["network"] = NETWORK_DIASPORA;
 924                                 }
 925                         }
 926                 }
 927         }
 928
 929         if (!$server) {
 930                 return false;
 931         }
 932
 933         $server["site_name"] = $xpath->evaluate($element."//head/title/text()", $context)->item(0)->nodeValue;
 934         return $server;
 935 }
 936
 937 function poco_check_server($server_url, $network = "", $force = false) {
 938
 939         // Unify the server address
 940         $server_url = trim($server_url, "/");
 941         $server_url = str_replace("/index.php", "", $server_url);
 942
 943         if ($server_url == "")
 944                 return false;
 945
 946         $servers = q("SELECT * FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
 947         if (dbm::is_result($servers)) {
 948
 949                 if ($servers[0]["created"] == "0000-00-00 00:00:00")
 950                         q("UPDATE `gserver` SET `created` = '%s' WHERE `nurl` = '%s'",
 951                                 dbesc(datetime_convert()), dbesc(normalise_link($server_url)));
 952
 953                 $poco = $servers[0]["poco"];
 954                 $noscrape = $servers[0]["noscrape"];
 955
 956                 if ($network == "")
 957                         $network = $servers[0]["network"];
 958
 959                 $last_contact = $servers[0]["last_contact"];
 960                 $last_failure = $servers[0]["last_failure"];
 961                 $version = $servers[0]["version"];
 962                 $platform = $servers[0]["platform"];
 963                 $site_name = $servers[0]["site_name"];
 964                 $info = $servers[0]["info"];
 965                 $register_policy = $servers[0]["register_policy"];
 966
 967                 if (!$force AND !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
 968                         logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 969                         return ($last_contact >= $last_failure);
 970                 }
 971         } else {
 972                 $poco = "";
 973                 $noscrape = "";
 974                 $version = "";
 975                 $platform = "";
 976                 $site_name = "";
 977                 $info = "";
 978                 $register_policy = -1;
 979
 980                 $last_contact = "0000-00-00 00:00:00";
 981                 $last_failure = "0000-00-00 00:00:00";
 982         }
 983         logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$servers[0]["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 984
 985         $failure = false;
 986         $possible_failure = false;
 987         $orig_last_failure = $last_failure;
 988         $orig_last_contact = $last_contact;
 989
 990         // Check if the page is accessible via SSL.
 991         $orig_server_url = $server_url;
 992         $server_url = str_replace("http://", "https://", $server_url);
 993
 994         // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
 995         $serverret = z_fetch_url($server_url."/.well-known/host-meta", false, $redirects, array('timeout' => 20));
 996
 997         // Quit if there is a timeout.
 998         // But we want to make sure to only quit if we are mostly sure that this server url fits.
 999         if (dbm::is_result($servers) AND ($orig_server_url == $server_url) AND
1000                 ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
1001                 logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1002                 return false;
1003         }
1004
1005         // Maybe the page is unencrypted only?
1006         $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1007         if (!$serverret["success"] OR ($serverret["body"] == "") OR (@sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
1008                 $server_url = str_replace("https://", "http://", $server_url);
1009
1010                 // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1011                 $serverret = z_fetch_url($server_url."/.well-known/host-meta", false, $redirects, array('timeout' => 20));
1012
1013                 // Quit if there is a timeout
1014                 if ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1015                         logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1016                         return false;
1017                 }
1018
1019                 $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1020         }
1021
1022         if (!$serverret["success"] OR ($serverret["body"] == "") OR (sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
1023                 // Workaround for bad configured servers (known nginx problem)
1024                 if (!in_array($serverret["debug"]["http_code"], array("403", "404"))) {
1025                         $last_failure = datetime_convert();
1026                         $failure = true;
1027                 }
1028                 $possible_failure = true;
1029         } elseif ($network == NETWORK_DIASPORA)
1030                 $last_contact = datetime_convert();
1031
1032         // If the server has no possible failure we reset the cached data
1033         if (!$possible_failure) {
1034                 $version = "";
1035                 $platform = "";
1036                 $site_name = "";
1037                 $info = "";
1038                 $register_policy = -1;
1039         }
1040
1041         // Look for poco
1042         if (!$failure) {
1043                 $serverret = z_fetch_url($server_url."/poco");
1044                 if ($serverret["success"]) {
1045                         $data = json_decode($serverret["body"]);
1046                         if (isset($data->totalResults)) {
1047                                 $poco = $server_url."/poco";
1048                                 $last_contact = datetime_convert();
1049
1050                                 $server = poco_detect_poco_data($data);
1051                                 if ($server) {
1052                                         $platform = $server['platform'];
1053                                         $network = $server['network'];
1054                                         $version = '';
1055                                         $site_name = '';
1056                                 }
1057                         }
1058                 }
1059         }
1060
1061         if (!$failure) {
1062                 // Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
1063                 $serverret = z_fetch_url($server_url);
1064
1065                 if (!$serverret["success"] OR ($serverret["body"] == "")) {
1066                         $last_failure = datetime_convert();
1067                         $failure = true;
1068                 } else {
1069                         $server = poco_detect_server_type($serverret["body"]);
1070                         if ($server) {
1071                                 $platform = $server['platform'];
1072                                 $network = $server['network'];
1073                                 $version = $server['version'];
1074                                 $site_name = $server['site_name'];
1075                                 $last_contact = datetime_convert();
1076                         }
1077
1078                         $lines = explode("\n",$serverret["header"]);
1079                         if (count($lines)) {
1080                                 foreach ($lines as $line) {
1081                                         $line = trim($line);
1082                                         if (stristr($line,'X-Diaspora-Version:')) {
1083                                                 $platform = "Diaspora";
1084                                                 $version = trim(str_replace("X-Diaspora-Version:", "", $line));
1085                                                 $version = trim(str_replace("x-diaspora-version:", "", $version));
1086                                                 $network = NETWORK_DIASPORA;
1087                                                 $versionparts = explode("-", $version);
1088                                                 $version = $versionparts[0];
1089                                                 $last_contact = datetime_convert();
1090                                         }
1091
1092                                         if (stristr($line,'Server: Mastodon')) {
1093                                                 $platform = "Mastodon";
1094                                                 $network = NETWORK_OSTATUS;
1095                                                 // Mastodon doesn't reveal version numbers
1096                                                 $version = "";
1097                                                 $last_contact = datetime_convert();
1098                                         }
1099                                 }
1100                         }
1101                 }
1102         }
1103
1104         if (!$failure AND ($poco == "")) {
1105                 // Test for Statusnet
1106                 // Will also return data for Friendica and GNU Social - but it will be overwritten later
1107                 // The "not implemented" is a special treatment for really, really old Friendica versions
1108                 $serverret = z_fetch_url($server_url."/api/statusnet/version.json");
1109                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
1110                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
1111                         $platform = "StatusNet";
1112                         // Remove junk that some GNU Social servers return
1113                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1114                         $version = trim($version, '"');
1115                         $network = NETWORK_OSTATUS;
1116                         $last_contact = datetime_convert();
1117                 }
1118
1119                 // Test for GNU Social
1120                 $serverret = z_fetch_url($server_url."/api/gnusocial/version.json");
1121                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
1122                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
1123                         $platform = "GNU Social";
1124                         // Remove junk that some GNU Social servers return
1125                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1126                         $version = trim($version, '"');
1127                         $network = NETWORK_OSTATUS;
1128                         $last_contact = datetime_convert();
1129                 }
1130         }
1131
1132         if (!$failure) {
1133                 // Test for Hubzilla, Redmatrix or Friendica
1134                 $serverret = z_fetch_url($server_url."/api/statusnet/config.json");
1135                 if ($serverret["success"]) {
1136                         $data = json_decode($serverret["body"]);
1137                         if (isset($data->site->server)) {
1138                                 $last_contact = datetime_convert();
1139
1140                                 if (isset($data->site->platform)) {
1141                                         $platform = $data->site->platform->PLATFORM_NAME;
1142                                         $version = $data->site->platform->STD_VERSION;
1143                                         $network = NETWORK_DIASPORA;
1144                                 }
1145                                 if (isset($data->site->BlaBlaNet)) {
1146                                         $platform = $data->site->BlaBlaNet->PLATFORM_NAME;
1147                                         $version = $data->site->BlaBlaNet->STD_VERSION;
1148                                         $network = NETWORK_DIASPORA;
1149                                 }
1150                                 if (isset($data->site->hubzilla)) {
1151                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
1152                                         $version = $data->site->hubzilla->RED_VERSION;
1153                                         $network = NETWORK_DIASPORA;
1154                                 }
1155                                 if (isset($data->site->redmatrix)) {
1156                                         if (isset($data->site->redmatrix->PLATFORM_NAME))
1157                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
1158                                         elseif (isset($data->site->redmatrix->RED_PLATFORM))
1159                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
1160
1161                                         $version = $data->site->redmatrix->RED_VERSION;
1162                                         $network = NETWORK_DIASPORA;
1163                                 }
1164                                 if (isset($data->site->friendica)) {
1165                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
1166                                         $version = $data->site->friendica->FRIENDICA_VERSION;
1167                                         $network = NETWORK_DFRN;
1168                                 }
1169
1170                                 $site_name = $data->site->name;
1171
1172                                 $data->site->closed = poco_to_boolean($data->site->closed);
1173                                 $data->site->private = poco_to_boolean($data->site->private);
1174                                 $data->site->inviteonly = poco_to_boolean($data->site->inviteonly);
1175
1176                                 if (!$data->site->closed AND !$data->site->private and $data->site->inviteonly)
1177                                         $register_policy = REGISTER_APPROVE;
1178                                 elseif (!$data->site->closed AND !$data->site->private)
1179                                         $register_policy = REGISTER_OPEN;
1180                                 else
1181                                         $register_policy = REGISTER_CLOSED;
1182                         }
1183                 }
1184         }
1185
1186
1187         // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
1188         if (!$failure) {
1189                 $serverret = z_fetch_url($server_url."/statistics.json");
1190                 if ($serverret["success"]) {
1191                         $data = json_decode($serverret["body"]);
1192                         if (isset($data->version)) {
1193                                 $version = $data->version;
1194                                 // Version numbers on statistics.json are presented with additional info, e.g.:
1195                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
1196                                 $version = preg_replace("=(.+)-(.{4,})=ism", "$1", $version);
1197                         }
1198
1199                         $site_name = $data->name;
1200
1201                         if (isset($data->network)) {
1202                                 $platform = $data->network;
1203                         }
1204
1205                         if ($platform == "Diaspora") {
1206                                 $network = NETWORK_DIASPORA;
1207                         }
1208
1209                         if ($data->registrations_open) {
1210                                 $register_policy = REGISTER_OPEN;
1211                         } else {
1212                                 $register_policy = REGISTER_CLOSED;
1213                         }
1214
1215                         if (isset($data->version))
1216                                 $last_contact = datetime_convert();
1217                 }
1218         }
1219
1220         // Query nodeinfo. Working for (at least) Diaspora and Friendica.
1221         if (!$failure) {
1222                 $server = poco_fetch_nodeinfo($server_url);
1223                 if ($server) {
1224                         $register_policy = $server['register_policy'];
1225
1226                         if (isset($server['platform'])) {
1227                                 $platform = $server['platform'];
1228                         }
1229
1230                         if (isset($server['network'])) {
1231                                 $network = $server['network'];
1232                         }
1233
1234                         if (isset($server['version'])) {
1235                                 $version = $server['version'];
1236                         }
1237
1238                         if (isset($server['site_name'])) {
1239                                 $site_name = $server['site_name'];
1240                         }
1241
1242                         $last_contact = datetime_convert();
1243                 }
1244         }
1245
1246         // Check for noscrape
1247         // Friendica servers could be detected as OStatus servers
1248         if (!$failure AND in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
1249                 $serverret = z_fetch_url($server_url."/friendica/json");
1250
1251                 if (!$serverret["success"])
1252                         $serverret = z_fetch_url($server_url."/friendika/json");
1253
1254                 if ($serverret["success"]) {
1255                         $data = json_decode($serverret["body"]);
1256
1257                         if (isset($data->version)) {
1258                                 $last_contact = datetime_convert();
1259                                 $network = NETWORK_DFRN;
1260
1261                                 $noscrape = $data->no_scrape_url;
1262                                 $version = $data->version;
1263                                 $site_name = $data->site_name;
1264                                 $info = $data->info;
1265                                 $register_policy_str = $data->register_policy;
1266                                 $platform = $data->platform;
1267
1268                                 switch ($register_policy_str) {
1269                                         case "REGISTER_CLOSED":
1270                                                 $register_policy = REGISTER_CLOSED;
1271                                                 break;
1272                                         case "REGISTER_APPROVE":
1273                                                 $register_policy = REGISTER_APPROVE;
1274                                                 break;
1275                                         case "REGISTER_OPEN":
1276                                                 $register_policy = REGISTER_OPEN;
1277                                                 break;
1278                                 }
1279                         }
1280                 }
1281         }
1282
1283         if ($possible_failure AND !$failure) {
1284                 $last_failure = datetime_convert();
1285                 $failure = true;
1286         }
1287
1288         if ($failure) {
1289                 $last_contact = $orig_last_contact;
1290         } else {
1291                 $last_failure = $orig_last_failure;
1292         }
1293
1294         if (($last_contact <= $last_failure) AND !$failure) {
1295                 logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
1296         } else if (($last_contact >= $last_failure) AND $failure) {
1297                 logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
1298         }
1299
1300         // Check again if the server exists
1301         $servers = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1302
1303         $version = strip_tags($version);
1304         $site_name = strip_tags($site_name);
1305         $info = strip_tags($info);
1306         $platform = strip_tags($platform);
1307
1308         if ($servers) {
1309                  q("UPDATE `gserver` SET `url` = '%s', `version` = '%s', `site_name` = '%s', `info` = '%s', `register_policy` = %d, `poco` = '%s', `noscrape` = '%s',
1310                         `network` = '%s', `platform` = '%s', `last_contact` = '%s', `last_failure` = '%s' WHERE `nurl` = '%s'",
1311                         dbesc($server_url),
1312                         dbesc($version),
1313                         dbesc($site_name),
1314                         dbesc($info),
1315                         intval($register_policy),
1316                         dbesc($poco),
1317                         dbesc($noscrape),
1318                         dbesc($network),
1319                         dbesc($platform),
1320                         dbesc($last_contact),
1321                         dbesc($last_failure),
1322                         dbesc(normalise_link($server_url))
1323                 );
1324         } elseif (!$failure) {
1325                 q("INSERT INTO `gserver` (`url`, `nurl`, `version`, `site_name`, `info`, `register_policy`, `poco`, `noscrape`, `network`, `platform`, `created`, `last_contact`, `last_failure`)
1326                                         VALUES ('%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s')",
1327                                 dbesc($server_url),
1328                                 dbesc(normalise_link($server_url)),
1329                                 dbesc($version),
1330                                 dbesc($site_name),
1331                                 dbesc($info),
1332                                 intval($register_policy),
1333                                 dbesc($poco),
1334                                 dbesc($noscrape),
1335                                 dbesc($network),
1336                                 dbesc($platform),
1337                                 dbesc(datetime_convert()),
1338                                 dbesc($last_contact),
1339                                 dbesc($last_failure),
1340                                 dbesc(datetime_convert())
1341                 );
1342         }
1343         logger("End discovery for server ".$server_url, LOGGER_DEBUG);
1344
1345         return !$failure;
1346 }
1347
1348 function count_common_friends($uid,$cid) {
1349
1350         $r = q("SELECT count(*) as `total`
1351                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1352                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1353                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1354                 AND `gcontact`.`nurl` IN (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 and id != %d ) ",
1355                 intval($cid),
1356                 intval($uid),
1357                 intval($uid),
1358                 intval($cid)
1359         );
1360
1361 //      logger("count_common_friends: $uid $cid {$r[0]['total']}");
1362         if (dbm::is_result($r))
1363                 return $r[0]['total'];
1364         return 0;
1365
1366 }
1367
1368
1369 function common_friends($uid,$cid,$start = 0,$limit=9999,$shuffle = false) {
1370
1371         if ($shuffle)
1372                 $sql_extra = " order by rand() ";
1373         else
1374                 $sql_extra = " order by `gcontact`.`name` asc ";
1375
1376         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1377                 FROM `glink`
1378                 INNER JOIN `gcontact` ON `glink`.`gcid` = `gcontact`.`id`
1379                 INNER JOIN `contact` ON `gcontact`.`nurl` = `contact`.`nurl`
1380                 WHERE `glink`.`cid` = %d and `glink`.`uid` = %d
1381                         AND `contact`.`uid` = %d AND `contact`.`self` = 0 AND `contact`.`blocked` = 0
1382                         AND `contact`.`hidden` = 0 AND `contact`.`id` != %d
1383                         AND ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1384                         $sql_extra LIMIT %d, %d",
1385                 intval($cid),
1386                 intval($uid),
1387                 intval($uid),
1388                 intval($cid),
1389                 intval($start),
1390                 intval($limit)
1391         );
1392
1393         return $r;
1394
1395 }
1396
1397
1398 function count_common_friends_zcid($uid,$zcid) {
1399
1400         $r = q("SELECT count(*) as `total`
1401                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1402                 where `glink`.`zcid` = %d
1403                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 ) ",
1404                 intval($zcid),
1405                 intval($uid)
1406         );
1407
1408         if (dbm::is_result($r))
1409                 return $r[0]['total'];
1410         return 0;
1411
1412 }
1413
1414 function common_friends_zcid($uid,$zcid,$start = 0, $limit = 9999,$shuffle = false) {
1415
1416         if ($shuffle)
1417                 $sql_extra = " order by rand() ";
1418         else
1419                 $sql_extra = " order by `gcontact`.`name` asc ";
1420
1421         $r = q("SELECT `gcontact`.*
1422                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1423                 where `glink`.`zcid` = %d
1424                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 )
1425                 $sql_extra limit %d, %d",
1426                 intval($zcid),
1427                 intval($uid),
1428                 intval($start),
1429                 intval($limit)
1430         );
1431
1432         return $r;
1433
1434 }
1435
1436
1437 function count_all_friends($uid,$cid) {
1438
1439         $r = q("SELECT count(*) as `total`
1440                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1441                 where `glink`.`cid` = %d and `glink`.`uid` = %d AND
1442                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))",
1443                 intval($cid),
1444                 intval($uid)
1445         );
1446
1447         if (dbm::is_result($r))
1448                 return $r[0]['total'];
1449         return 0;
1450
1451 }
1452
1453
1454 function all_friends($uid,$cid,$start = 0, $limit = 80) {
1455
1456         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1457                 FROM `glink`
1458                 INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1459                 LEFT JOIN `contact` ON `contact`.`nurl` = `gcontact`.`nurl` AND `contact`.`uid` = %d
1460                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1461                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1462                 ORDER BY `gcontact`.`name` ASC LIMIT %d, %d ",
1463                 intval($uid),
1464                 intval($cid),
1465                 intval($uid),
1466                 intval($start),
1467                 intval($limit)
1468         );
1469
1470         return $r;
1471 }
1472
1473
1474
1475 function suggestion_query($uid, $start = 0, $limit = 80) {
1476
1477         if (!$uid) {
1478                 return array();
1479         }
1480
1481 // Uncommented because the result of the queries are to big to store it in the cache.
1482 // We need to decide if we want to change the db column type or if we want to delete it.
1483 //      $list = Cache::get("suggestion_query:".$uid.":".$start.":".$limit);
1484 //      if (!is_null($list)) {
1485 //              return $list;
1486 //      }
1487
1488         $network = array(NETWORK_DFRN);
1489
1490         if (get_config('system','diaspora_enabled'))
1491                 $network[] = NETWORK_DIASPORA;
1492
1493         if (!get_config('system','ostatus_disabled'))
1494                 $network[] = NETWORK_OSTATUS;
1495
1496         $sql_network = implode("', '", $network);
1497         $sql_network = "'".$sql_network."'";
1498
1499         /// @todo This query is really slow
1500         // By now we cache the data for five minutes
1501         $r = q("SELECT count(glink.gcid) as `total`, gcontact.* from gcontact
1502                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1503                 where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
1504                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1505                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1506                 AND `gcontact`.`updated` != '0000-00-00 00:00:00'
1507                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1508                 AND `gcontact`.`network` IN (%s)
1509                 GROUP BY `glink`.`gcid` ORDER BY `gcontact`.`updated` DESC,`total` DESC LIMIT %d, %d",
1510                 intval($uid),
1511                 intval($uid),
1512                 intval($uid),
1513                 intval($uid),
1514                 $sql_network,
1515                 intval($start),
1516                 intval($limit)
1517         );
1518
1519         if (dbm::is_result($r) && count($r) >= ($limit -1)) {
1520 // Uncommented because the result of the queries are to big to store it in the cache.
1521 // We need to decide if we want to change the db column type or if we want to delete it.
1522 //              Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $r, CACHE_FIVE_MINUTES);
1523
1524                 return $r;
1525         }
1526
1527         $r2 = q("SELECT gcontact.* FROM gcontact
1528                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1529                 WHERE `glink`.`uid` = 0 AND `glink`.`cid` = 0 AND `glink`.`zcid` = 0 AND NOT `gcontact`.`nurl` IN (SELECT `nurl` FROM `contact` WHERE `uid` = %d)
1530                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1531                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1532                 AND `gcontact`.`updated` != '0000-00-00 00:00:00'
1533                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1534                 AND `gcontact`.`network` IN (%s)
1535                 ORDER BY rand() LIMIT %d, %d",
1536                 intval($uid),
1537                 intval($uid),
1538                 intval($uid),
1539                 $sql_network,
1540                 intval($start),
1541                 intval($limit)
1542         );
1543
1544         $list = array();
1545         foreach ($r2 AS $suggestion)
1546                 $list[$suggestion["nurl"]] = $suggestion;
1547
1548         foreach ($r AS $suggestion)
1549                 $list[$suggestion["nurl"]] = $suggestion;
1550
1551         while (sizeof($list) > ($limit))
1552                 array_pop($list);
1553
1554 // Uncommented because the result of the queries are to big to store it in the cache.
1555 // We need to decide if we want to change the db column type or if we want to delete it.
1556 //      Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $list, CACHE_FIVE_MINUTES);
1557         return $list;
1558 }
1559
1560 function update_suggestions() {
1561
1562         $a = get_app();
1563
1564         $done = array();
1565
1566         /// @TODO Check if it is really neccessary to poll the own server
1567         poco_load(0,0,0,App::get_baseurl() . '/poco');
1568
1569         $done[] = App::get_baseurl() . '/poco';
1570
1571         if (strlen(get_config('system','directory'))) {
1572                 $x = fetch_url(get_server()."/pubsites");
1573                 if ($x) {
1574                         $j = json_decode($x);
1575                         if ($j->entries) {
1576                                 foreach ($j->entries as $entry) {
1577
1578                                         poco_check_server($entry->url);
1579
1580                                         $url = $entry->url . '/poco';
1581                                         if (! in_array($url,$done)) {
1582                                                 poco_load(0,0,0,$entry->url . '/poco');
1583                                         }
1584                                 }
1585                         }
1586                 }
1587         }
1588
1589         // Query your contacts from Friendica and Redmatrix/Hubzilla for their contacts
1590         $r = q("SELECT DISTINCT(`poco`) AS `poco` FROM `contact` WHERE `network` IN ('%s', '%s')",
1591                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA)
1592         );
1593
1594         if (dbm::is_result($r)) {
1595                 foreach ($r as $rr) {
1596                         $base = substr($rr['poco'],0,strrpos($rr['poco'],'/'));
1597                         if (! in_array($base,$done))
1598                                 poco_load(0,0,0,$base);
1599                 }
1600         }
1601 }
1602
1603 /**
1604  * @brief Fetch server list from remote servers and adds them when they are new.
1605  *
1606  * @param string $poco URL to the POCO endpoint
1607  */
1608 function poco_fetch_serverlist($poco) {
1609         $serverret = z_fetch_url($poco."/@server");
1610         if (!$serverret["success"]) {
1611                 return;
1612         }
1613         $serverlist = json_decode($serverret['body']);
1614
1615         if (!is_array($serverlist)) {
1616                 return;
1617         }
1618
1619         foreach ($serverlist AS $server) {
1620                 $server_url = str_replace("/index.php", "", $server->url);
1621
1622                 $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1623                 if (!dbm::is_result($r)) {
1624                         logger("Call server check for server ".$server_url, LOGGER_DEBUG);
1625                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode($server_url));
1626                 }
1627         }
1628 }
1629
1630 function poco_discover_federation() {
1631         $last = get_config('poco','last_federation_discovery');
1632
1633         if ($last) {
1634                 $next = $last + (24 * 60 * 60);
1635                 if ($next > time())
1636                         return;
1637         }
1638
1639         // Discover Friendica, Hubzilla and Diaspora servers
1640         $serverdata = fetch_url("http://the-federation.info/pods.json");
1641
1642         if ($serverdata) {
1643                 $servers = json_decode($serverdata);
1644
1645                 foreach ($servers->pods AS $server) {
1646                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode("https://".$server->host));
1647                 }
1648         }
1649
1650         // Currently disabled, since the service isn't available anymore.
1651         // It is not removed since I hope that there will be a successor.
1652         // Discover GNU Social Servers.
1653         //if (!get_config('system','ostatus_disabled')) {
1654         //      $serverdata = "http://gstools.org/api/get_open_instances/";
1655
1656         //      $result = z_fetch_url($serverdata);
1657         //      if ($result["success"]) {
1658         //              $servers = json_decode($result["body"]);
1659
1660         //              foreach($servers->data AS $server)
1661         //                      poco_check_server($server->instance_address);
1662         //      }
1663         //}
1664
1665         set_config('poco','last_federation_discovery', time());
1666 }
1667
1668 function poco_discover($complete = false) {
1669
1670         // Update the server list
1671         poco_discover_federation();
1672
1673         $no_of_queries = 5;
1674
1675         $requery_days = intval(get_config("system", "poco_requery_days"));
1676
1677         if ($requery_days == 0)
1678                 $requery_days = 7;
1679
1680         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1681
1682         $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1683         if ($r)
1684                 foreach ($r AS $server) {
1685
1686                         if (!poco_check_server($server["url"], $server["network"])) {
1687                                 // The server is not reachable? Okay, then we will try it later
1688                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1689                                 continue;
1690                         }
1691
1692                         // Discover new servers out there
1693                         poco_fetch_serverlist($server["poco"]);
1694
1695                         // Fetch all users from the other server
1696                         $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1697
1698                         logger("Fetch all users from the server ".$server["nurl"], LOGGER_DEBUG);
1699
1700                         $retdata = z_fetch_url($url);
1701                         if ($retdata["success"]) {
1702                                 $data = json_decode($retdata["body"]);
1703
1704                                 poco_discover_server($data, 2);
1705
1706                                 if (get_config('system','poco_discovery') > 1) {
1707
1708                                         $timeframe = get_config('system','poco_discovery_since');
1709                                         if ($timeframe == 0)
1710                                                 $timeframe = 30;
1711
1712                                         $updatedSince = date("Y-m-d H:i:s", time() - $timeframe * 86400);
1713
1714                                         // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1715                                         $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1716
1717                                         $success = false;
1718
1719                                         $retdata = z_fetch_url($url);
1720                                         if ($retdata["success"]) {
1721                                                 logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1722                                                 $success = poco_discover_server(json_decode($retdata["body"]));
1723                                         }
1724
1725                                         if (!$success AND (get_config('system','poco_discovery') > 2)) {
1726                                                 logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1727                                                 poco_discover_server_users($data, $server);
1728                                         }
1729                                 }
1730
1731                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1732                                 if (!$complete AND (--$no_of_queries == 0))
1733                                         break;
1734                         } else {
1735                                 // If the server hadn't replied correctly, then force a sanity check
1736                                 poco_check_server($server["url"], $server["network"], true);
1737
1738                                 // If we couldn't reach the server, we will try it some time later
1739                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1740                         }
1741                 }
1742 }
1743
1744 function poco_discover_server_users($data, $server) {
1745
1746         if (!isset($data->entry))
1747                 return;
1748
1749         foreach ($data->entry AS $entry) {
1750                 $username = "";
1751                 if (isset($entry->urls)) {
1752                         foreach($entry->urls as $url)
1753                                 if ($url->type == 'profile') {
1754                                         $profile_url = $url->value;
1755                                         $urlparts = parse_url($profile_url);
1756                                         $username = end(explode("/", $urlparts["path"]));
1757                                 }
1758                 }
1759                 if ($username != "") {
1760                         logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1761
1762                         // Fetch all contacts from a given user from the other server
1763                         $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1764
1765                         $retdata = z_fetch_url($url);
1766                         if ($retdata["success"])
1767                                 poco_discover_server(json_decode($retdata["body"]), 3);
1768                 }
1769         }
1770 }
1771
1772 function poco_discover_server($data, $default_generation = 0) {
1773
1774         if (!isset($data->entry) OR !count($data->entry))
1775                 return false;
1776
1777         $success = false;
1778
1779         foreach ($data->entry AS $entry) {
1780                 $profile_url = '';
1781                 $profile_photo = '';
1782                 $connect_url = '';
1783                 $name = '';
1784                 $network = '';
1785                 $updated = '0000-00-00 00:00:00';
1786                 $location = '';
1787                 $about = '';
1788                 $keywords = '';
1789                 $gender = '';
1790                 $contact_type = -1;
1791                 $generation = $default_generation;
1792
1793                 $name = $entry->displayName;
1794
1795                 if (isset($entry->urls)) {
1796                         foreach($entry->urls as $url) {
1797                                 if ($url->type == 'profile') {
1798                                         $profile_url = $url->value;
1799                                         continue;
1800                                 }
1801                                 if ($url->type == 'webfinger') {
1802                                         $connect_url = str_replace('acct:' , '', $url->value);
1803                                         continue;
1804                                 }
1805                         }
1806                 }
1807
1808                 if (isset($entry->photos)) {
1809                         foreach ($entry->photos as $photo) {
1810                                 if ($photo->type == 'profile') {
1811                                         $profile_photo = $photo->value;
1812                                         continue;
1813                                 }
1814                         }
1815                 }
1816
1817                 if (isset($entry->updated)) {
1818                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
1819                 }
1820
1821                 if (isset($entry->network)) {
1822                         $network = $entry->network;
1823                 }
1824
1825                 if (isset($entry->currentLocation)) {
1826                         $location = $entry->currentLocation;
1827                 }
1828
1829                 if (isset($entry->aboutMe)) {
1830                         $about = html2bbcode($entry->aboutMe);
1831                 }
1832
1833                 if (isset($entry->gender)) {
1834                         $gender = $entry->gender;
1835                 }
1836
1837                 if (isset($entry->generation) AND ($entry->generation > 0)) {
1838                         $generation = ++$entry->generation;
1839                 }
1840
1841                 if (isset($entry->contactType) AND ($entry->contactType >= 0)) {
1842                         $contact_type = $entry->contactType;
1843                 }
1844
1845                 if (isset($entry->tags)) {
1846                         foreach ($entry->tags as $tag) {
1847                                 $keywords = implode(", ", $tag);
1848                         }
1849                 }
1850
1851                 if ($generation > 0) {
1852                         $success = true;
1853
1854                         logger("Store profile ".$profile_url, LOGGER_DEBUG);
1855                         poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, 0, 0, 0);
1856
1857                         $gcontact = array("url" => $profile_url, "contact-type" => $contact_type, "generation" => $generation);
1858                         update_gcontact($gcontact);
1859
1860                         logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1861                 }
1862         }
1863         return $success;
1864 }
1865
1866 /**
1867  * @brief Removes unwanted parts from a contact url
1868  *
1869  * @param string $url Contact url
1870  * @return string Contact url with the wanted parts
1871  */
1872 function clean_contact_url($url) {
1873         $parts = parse_url($url);
1874
1875         if (!isset($parts["scheme"]) OR !isset($parts["host"]))
1876                 return $url;
1877
1878         $new_url = $parts["scheme"]."://".$parts["host"];
1879
1880         if (isset($parts["port"]))
1881                 $new_url .= ":".$parts["port"];
1882
1883         if (isset($parts["path"]))
1884                 $new_url .= $parts["path"];
1885
1886         if ($new_url != $url)
1887                 logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".App::callstack(), LOGGER_DEBUG);
1888
1889         return $new_url;
1890 }
1891
1892 /**
1893  * @brief Replace alternate OStatus user format with the primary one
1894  *
1895  * @param arr $contact contact array (called by reference)
1896  */
1897 function fix_alternate_contact_address(&$contact) {
1898         if (($contact["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($contact["url"])) {
1899                 $data = probe_url($contact["url"]);
1900                 if ($contact["network"] == NETWORK_OSTATUS) {
1901                         logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1902                         $contact["url"] = $data["url"];
1903                         $contact["addr"] = $data["addr"];
1904                         $contact["alias"] = $data["alias"];
1905                         $contact["server_url"] = $data["baseurl"];
1906                 }
1907         }
1908 }
1909
1910 /**
1911  * @brief Fetch the gcontact id, add an entry if not existed
1912  *
1913  * @param arr $contact contact array
1914  * @return bool|int Returns false if not found, integer if contact was found
1915  */
1916 function get_gcontact_id($contact) {
1917
1918         $gcontact_id = 0;
1919         $doprobing = false;
1920
1921         if (in_array($contact["network"], array(NETWORK_PHANTOM))) {
1922                 logger("Invalid network for contact url ".$contact["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1923                 return false;
1924         }
1925
1926         if ($contact["network"] == NETWORK_STATUSNET)
1927                 $contact["network"] = NETWORK_OSTATUS;
1928
1929         // All new contacts are hidden by default
1930         if (!isset($contact["hide"]))
1931                 $contact["hide"] = true;
1932
1933         // Replace alternate OStatus user format with the primary one
1934         fix_alternate_contact_address($contact);
1935
1936         // Remove unwanted parts from the contact url (e.g. "?zrl=...")
1937         if (in_array($contact["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)))
1938                 $contact["url"] = clean_contact_url($contact["url"]);
1939
1940         $r = q("SELECT `id`, `last_contact`, `last_failure`, `network` FROM `gcontact` WHERE `nurl` = '%s' LIMIT 2",
1941                 dbesc(normalise_link($contact["url"])));
1942
1943         if ($r) {
1944                 $gcontact_id = $r[0]["id"];
1945
1946                 // Update every 90 days
1947                 if (in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
1948                         $last_failure_str = $r[0]["last_failure"];
1949                         $last_failure = strtotime($r[0]["last_failure"]);
1950                         $last_contact_str = $r[0]["last_contact"];
1951                         $last_contact = strtotime($r[0]["last_contact"]);
1952                         $doprobing = (((time() - $last_contact) > (90 * 86400)) AND ((time() - $last_failure) > (90 * 86400)));
1953                 }
1954         } else {
1955                 q("INSERT INTO `gcontact` (`name`, `nick`, `addr` , `network`, `url`, `nurl`, `photo`, `created`, `updated`, `location`, `about`, `hide`, `generation`)
1956                         VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d)",
1957                         dbesc($contact["name"]),
1958                         dbesc($contact["nick"]),
1959                         dbesc($contact["addr"]),
1960                         dbesc($contact["network"]),
1961                         dbesc($contact["url"]),
1962                         dbesc(normalise_link($contact["url"])),
1963                         dbesc($contact["photo"]),
1964                         dbesc(datetime_convert()),
1965                         dbesc(datetime_convert()),
1966                         dbesc($contact["location"]),
1967                         dbesc($contact["about"]),
1968                         intval($contact["hide"]),
1969                         intval($contact["generation"])
1970                 );
1971
1972                 $r = q("SELECT `id`, `network` FROM `gcontact` WHERE `nurl` = '%s' ORDER BY `id` LIMIT 2",
1973                         dbesc(normalise_link($contact["url"])));
1974
1975                 if ($r) {
1976                         $gcontact_id = $r[0]["id"];
1977
1978                         $doprobing = in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""));
1979                 }
1980         }
1981
1982         if ($doprobing) {
1983                 logger("Last Contact: ". $last_contact_str." - Last Failure: ".$last_failure_str." - Checking: ".$contact["url"], LOGGER_DEBUG);
1984                 proc_run(PRIORITY_LOW, 'include/gprobe.php', bin2hex($contact["url"]));
1985         }
1986
1987         if ((dbm::is_result($r)) AND (count($r) > 1) AND ($gcontact_id > 0) AND ($contact["url"] != ""))
1988          q("DELETE FROM `gcontact` WHERE `nurl` = '%s' AND `id` != %d",
1989                 dbesc(normalise_link($contact["url"])),
1990                 intval($gcontact_id));
1991
1992         return $gcontact_id;
1993 }
1994
1995 /**
1996  * @brief Updates the gcontact table from a given array
1997  *
1998  * @param arr $contact contact array
1999  * @return bool|int Returns false if not found, integer if contact was found
2000  */
2001 function update_gcontact($contact) {
2002
2003         // Check for invalid "contact-type" value
2004         if (isset($contact['contact-type']) AND (intval($contact['contact-type']) < 0)) {
2005                 $contact['contact-type'] = 0;
2006         }
2007
2008         /// @todo update contact table as well
2009
2010         $gcontact_id = get_gcontact_id($contact);
2011
2012         if (!$gcontact_id)
2013                 return false;
2014
2015         $r = q("SELECT `name`, `nick`, `photo`, `location`, `about`, `addr`, `generation`, `birthday`, `gender`, `keywords`,
2016                         `contact-type`, `hide`, `nsfw`, `network`, `alias`, `notify`, `server_url`, `connect`, `updated`, `url`
2017                 FROM `gcontact` WHERE `id` = %d LIMIT 1",
2018                 intval($gcontact_id));
2019
2020         // Get all field names
2021         $fields = array();
2022         foreach ($r[0] AS $field => $data)
2023                 $fields[$field] = $data;
2024
2025         unset($fields["url"]);
2026         unset($fields["updated"]);
2027         unset($fields["hide"]);
2028
2029         // Bugfix: We had an error in the storing of keywords which lead to the "0"
2030         // This value is still transmitted via poco.
2031         if ($contact["keywords"] == "0")
2032                 unset($contact["keywords"]);
2033
2034         if ($r[0]["keywords"] == "0")
2035                 $r[0]["keywords"] = "";
2036
2037         // assign all unassigned fields from the database entry
2038         foreach ($fields AS $field => $data)
2039                 if (!isset($contact[$field]) OR ($contact[$field] == ""))
2040                         $contact[$field] = $r[0][$field];
2041
2042         if (!isset($contact["hide"]))
2043                 $contact["hide"] = $r[0]["hide"];
2044
2045         $fields["hide"] = $r[0]["hide"];
2046
2047         if ($contact["network"] == NETWORK_STATUSNET)
2048                 $contact["network"] = NETWORK_OSTATUS;
2049
2050         // Replace alternate OStatus user format with the primary one
2051         fix_alternate_contact_address($contact);
2052
2053         if (!isset($contact["updated"]))
2054                 $contact["updated"] = datetime_convert();
2055
2056         if ($contact["server_url"] == "") {
2057                 $server_url = $contact["url"];
2058
2059                 $server_url = matching_url($server_url, $contact["alias"]);
2060                 if ($server_url != "")
2061                         $contact["server_url"] = $server_url;
2062
2063                 $server_url = matching_url($server_url, $contact["photo"]);
2064                 if ($server_url != "")
2065                         $contact["server_url"] = $server_url;
2066
2067                 $server_url = matching_url($server_url, $contact["notify"]);
2068                 if ($server_url != "")
2069                         $contact["server_url"] = $server_url;
2070         } else
2071                 $contact["server_url"] = normalise_link($contact["server_url"]);
2072
2073         if (($contact["addr"] == "") AND ($contact["server_url"] != "") AND ($contact["nick"] != "")) {
2074                 $hostname = str_replace("http://", "", $contact["server_url"]);
2075                 $contact["addr"] = $contact["nick"]."@".$hostname;
2076         }
2077
2078         // Check if any field changed
2079         $update = false;
2080         unset($fields["generation"]);
2081
2082         if ((($contact["generation"] > 0) AND ($contact["generation"] <= $r[0]["generation"])) OR ($r[0]["generation"] == 0)) {
2083                 foreach ($fields AS $field => $data)
2084                         if ($contact[$field] != $r[0][$field]) {
2085                                 logger("Difference for contact ".$contact["url"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
2086                                 $update = true;
2087                         }
2088
2089                 if ($contact["generation"] < $r[0]["generation"]) {
2090                         logger("Difference for contact ".$contact["url"]." in field 'generation'. new value: '".$contact["generation"]."', old value '".$r[0]["generation"]."'", LOGGER_DEBUG);
2091                         $update = true;
2092                 }
2093         }
2094
2095         if ($update) {
2096                 logger("Update gcontact for ".$contact["url"], LOGGER_DEBUG);
2097
2098                 q("UPDATE `gcontact` SET `photo` = '%s', `name` = '%s', `nick` = '%s', `addr` = '%s', `network` = '%s',
2099                                         `birthday` = '%s', `gender` = '%s', `keywords` = '%s', `hide` = %d, `nsfw` = %d,
2100                                         `contact-type` = %d, `alias` = '%s', `notify` = '%s', `url` = '%s',
2101                                         `location` = '%s', `about` = '%s', `generation` = %d, `updated` = '%s',
2102                                         `server_url` = '%s', `connect` = '%s'
2103                                 WHERE `nurl` = '%s' AND (`generation` = 0 OR `generation` >= %d)",
2104                         dbesc($contact["photo"]), dbesc($contact["name"]), dbesc($contact["nick"]),
2105                         dbesc($contact["addr"]), dbesc($contact["network"]), dbesc($contact["birthday"]),
2106                         dbesc($contact["gender"]), dbesc($contact["keywords"]), intval($contact["hide"]),
2107                         intval($contact["nsfw"]), intval($contact["contact-type"]), dbesc($contact["alias"]),
2108                         dbesc($contact["notify"]), dbesc($contact["url"]), dbesc($contact["location"]),
2109                         dbesc($contact["about"]), intval($contact["generation"]), dbesc($contact["updated"]),
2110                         dbesc($contact["server_url"]), dbesc($contact["connect"]),
2111                         dbesc(normalise_link($contact["url"])), intval($contact["generation"]));
2112
2113
2114                 // Now update the contact entry with the user id "0" as well.
2115                 // This is used for the shadow copies of public items.
2116                 $r = q("SELECT `id` FROM `contact` WHERE `nurl` = '%s' AND `uid` = 0 ORDER BY `id` LIMIT 1",
2117                         dbesc(normalise_link($contact["url"])));
2118
2119                 if ($r) {
2120                         logger("Update shadow contact ".$r[0]["id"], LOGGER_DEBUG);
2121
2122                         update_contact_avatar($contact["photo"], 0, $r[0]["id"]);
2123
2124                         q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s',
2125                                                 `network` = '%s', `bd` = '%s', `gender` = '%s',
2126                                                 `keywords` = '%s', `alias` = '%s', `contact-type` = %d,
2127                                                 `url` = '%s', `location` = '%s', `about` = '%s'
2128                                         WHERE `id` = %d",
2129                                 dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["addr"]),
2130                                 dbesc($contact["network"]), dbesc($contact["birthday"]), dbesc($contact["gender"]),
2131                                 dbesc($contact["keywords"]), dbesc($contact["alias"]), intval($contact["contact-type"]),
2132                                 dbesc($contact["url"]), dbesc($contact["location"]), dbesc($contact["about"]),
2133                                 intval($r[0]["id"]));
2134                 }
2135         }
2136
2137         return $gcontact_id;
2138 }
2139
2140 /**
2141  * @brief Updates the gcontact entry from probe
2142  *
2143  * @param str $url profile link
2144  */
2145 function update_gcontact_from_probe($url) {
2146         $data = probe_url($url);
2147
2148         if (in_array($data["network"], array(NETWORK_PHANTOM))) {
2149                 logger("Invalid network for contact url ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
2150                 return;
2151         }
2152
2153         update_gcontact($data);
2154 }
2155
2156 /**
2157  * @brief Update the gcontact entry for a given user id
2158  *
2159  * @param int $uid User ID
2160  */
2161 function update_gcontact_for_user($uid) {
2162         $r = q("SELECT `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
2163                         `profile`.`name`, `profile`.`about`, `profile`.`gender`,
2164                         `profile`.`pub_keywords`, `profile`.`dob`, `profile`.`photo`,
2165                         `profile`.`net-publish`, `user`.`nickname`, `user`.`hidewall`,
2166                         `contact`.`notify`, `contact`.`url`, `contact`.`addr`
2167                 FROM `profile`
2168                         INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
2169                         INNER JOIN `contact` ON `contact`.`uid` = `profile`.`uid`
2170                 WHERE `profile`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self`",
2171                 intval($uid));
2172
2173         $location = formatted_location(array("locality" => $r[0]["locality"], "region" => $r[0]["region"],
2174                                                 "country-name" => $r[0]["country-name"]));
2175
2176         // The "addr" field was added in 3.4.3 so it can be empty for older users
2177         if ($r[0]["addr"] != "")
2178                 $addr = $r[0]["nickname"].'@'.str_replace(array("http://", "https://"), "", App::get_baseurl());
2179         else
2180                 $addr = $r[0]["addr"];
2181
2182         $gcontact = array("name" => $r[0]["name"], "location" => $location, "about" => $r[0]["about"],
2183                         "gender" => $r[0]["gender"], "keywords" => $r[0]["pub_keywords"],
2184                         "birthday" => $r[0]["dob"], "photo" => $r[0]["photo"],
2185                         "notify" => $r[0]["notify"], "url" => $r[0]["url"],
2186                         "hide" => ($r[0]["hidewall"] OR !$r[0]["net-publish"]),
2187                         "nick" => $r[0]["nickname"], "addr" => $addr,
2188                         "connect" => $addr, "server_url" => App::get_baseurl(),
2189                         "generation" => 1, "network" => NETWORK_DFRN);
2190
2191         update_gcontact($gcontact);
2192 }
2193
2194 /**
2195  * @brief Fetches users of given GNU Social server
2196  *
2197  * If the "Statistics" plugin is enabled (See http://gstools.org/ for details) we query user data with this.
2198  *
2199  * @param str $server Server address
2200  */
2201 function gs_fetch_users($server) {
2202
2203         logger("Fetching users from GNU Social server ".$server, LOGGER_DEBUG);
2204
2205         $url = $server."/main/statistics";
2206
2207         $result = z_fetch_url($url);
2208         if (!$result["success"])
2209                 return false;
2210
2211         $statistics = json_decode($result["body"]);
2212
2213         if (is_object($statistics->config)) {
2214                 if ($statistics->config->instance_with_ssl)
2215                         $server = "https://";
2216                 else
2217                         $server = "http://";
2218
2219                 $server .= $statistics->config->instance_address;
2220
2221                 $hostname = $statistics->config->instance_address;
2222         } else {
2223                 if ($statistics->instance_with_ssl)
2224                         $server = "https://";
2225                 else
2226                         $server = "http://";
2227
2228                 $server .= $statistics->instance_address;
2229
2230                 $hostname = $statistics->instance_address;
2231         }
2232
2233         if (is_object($statistics->users))
2234                 foreach ($statistics->users AS $nick => $user) {
2235                         $profile_url = $server."/".$user->nickname;
2236
2237                         $contact = array("url" => $profile_url,
2238                                         "name" => $user->fullname,
2239                                         "addr" => $user->nickname."@".$hostname,
2240                                         "nick" => $user->nickname,
2241                                         "about" => $user->bio,
2242                                         "network" => NETWORK_OSTATUS,
2243                                         "photo" => App::get_baseurl()."/images/person-175.jpg");
2244                         get_gcontact_id($contact);
2245                 }
2246 }
2247
2248 /**
2249  * @brief Asking GNU Social server on a regular base for their user data
2250  *
2251  */
2252 function gs_discover() {
2253
2254         $requery_days = intval(get_config("system", "poco_requery_days"));
2255
2256         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
2257
2258         $r = q("SELECT `nurl`, `url` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `network` = '%s' AND `last_poco_query` < '%s' ORDER BY RAND() LIMIT 5",
2259                 dbesc(NETWORK_OSTATUS), dbesc($last_update));
2260
2261         if (!$r)
2262                 return;
2263
2264         foreach ($r AS $server) {
2265                 gs_fetch_users($server["url"]);
2266                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
2267         }
2268 }
2269
2270 /**
2271  * @brief Returns a list of all known servers
2272  * @return array List of server urls
2273  */
2274 function poco_serverlist() {
2275         $r = q("SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
2276                 WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
2277                 ORDER BY `last_contact`
2278                 LIMIT 1000",
2279                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA), dbesc(NETWORK_OSTATUS));
2280         if (!dbm::is_result($r)) {
2281                 return false;
2282         }
2283         return $r;
2284 }
2285 ?>