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 (Hubzilla or Friendica) via the front page body
 768  *
 769  * @param string $body Front page of the server
 770  * @return array Server data
 771  */
 772 function poco_detect_server_type($body) {
 773         $server = false;
 774
 775         $doc = new \DOMDocument();
 776         @$doc->loadHTML($body);
 777         $xpath = new \DomXPath($doc);
 778
 779         $list = $xpath->query("//meta[@name]");
 780
 781         foreach ($list as $node) {
 782                 $attr = array();
 783                 if ($node->attributes->length) {
 784                         foreach ($node->attributes as $attribute) {
 785                                 $attr[$attribute->name] = $attribute->value;
 786                         }
 787                 }
 788                 if ($attr['name'] == 'generator') {
 789                         $version_part = explode(" ", $attr['content']);
 790                         if (count($version_part) == 2) {
 791                                 if (in_array($version_part[0], array("Friendika", "Friendica"))) {
 792                                         $server = array();
 793                                         $server["platform"] = $version_part[0];
 794                                         $server["version"] = $version_part[1];
 795                                         $server["network"] = NETWORK_DFRN;
 796                                 }
 797                         }
 798                 }
 799         }
 800
 801         if (!$server) {
 802                 $list = $xpath->query("//meta[@property]");
 803
 804                 foreach ($list as $node) {
 805                         $attr = array();
 806                         if ($node->attributes->length) {
 807                                 foreach ($node->attributes as $attribute) {
 808                                         $attr[$attribute->name] = $attribute->value;
 809                                 }
 810                         }
 811                         if ($attr['property'] == 'generator') {
 812                                 if (in_array($attr['content'], array("hubzilla", "BlaBlaNet"))) {
 813                                         $server = array();
 814                                         $server["platform"] = $attr['content'];
 815                                         $server["version"] = "";
 816                                         $server["network"] = NETWORK_DIASPORA;
 817                                 }
 818                         }
 819                 }
 820         }
 821
 822         if (!$server) {
 823                 return false;
 824         }
 825
 826         $server["site_name"] = $xpath->evaluate($element."//head/title/text()", $context)->item(0)->nodeValue;
 827         return $server;
 828 }
 829
 830 function poco_check_server($server_url, $network = "", $force = false) {
 831
 832         // Unify the server address
 833         $server_url = trim($server_url, "/");
 834         $server_url = str_replace("/index.php", "", $server_url);
 835
 836         if ($server_url == "")
 837                 return false;
 838
 839         $servers = q("SELECT * FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
 840         if ($servers) {
 841
 842                 if ($servers[0]["created"] == "0000-00-00 00:00:00")
 843                         q("UPDATE `gserver` SET `created` = '%s' WHERE `nurl` = '%s'",
 844                                 dbesc(datetime_convert()), dbesc(normalise_link($server_url)));
 845
 846                 $poco = $servers[0]["poco"];
 847                 $noscrape = $servers[0]["noscrape"];
 848
 849                 if ($network == "")
 850                         $network = $servers[0]["network"];
 851
 852                 $last_contact = $servers[0]["last_contact"];
 853                 $last_failure = $servers[0]["last_failure"];
 854                 $version = $servers[0]["version"];
 855                 $platform = $servers[0]["platform"];
 856                 $site_name = $servers[0]["site_name"];
 857                 $info = $servers[0]["info"];
 858                 $register_policy = $servers[0]["register_policy"];
 859
 860                 if (!$force AND !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
 861                         logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 862                         return ($last_contact >= $last_failure);
 863                 }
 864         } else {
 865                 $poco = "";
 866                 $noscrape = "";
 867                 $version = "";
 868                 $platform = "";
 869                 $site_name = "";
 870                 $info = "";
 871                 $register_policy = -1;
 872
 873                 $last_contact = "0000-00-00 00:00:00";
 874                 $last_failure = "0000-00-00 00:00:00";
 875         }
 876         logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$servers[0]["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 877
 878         $failure = false;
 879         $possible_failure = false;
 880         $orig_last_failure = $last_failure;
 881         $orig_last_contact = $last_contact;
 882
 883         // Check if the page is accessible via SSL.
 884         $server_url = str_replace("http://", "https://", $server_url);
 885         $serverret = z_fetch_url($server_url."/.well-known/host-meta");
 886
 887         // Maybe the page is unencrypted only?
 888         $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
 889         if (!$serverret["success"] OR ($serverret["body"] == "") OR (@sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
 890                 $server_url = str_replace("https://", "http://", $server_url);
 891                 $serverret = z_fetch_url($server_url."/.well-known/host-meta");
 892
 893                 $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
 894         }
 895
 896         if (!$serverret["success"] OR ($serverret["body"] == "") OR (sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
 897                 // Workaround for bad configured servers (known nginx problem)
 898                 if ($serverret["debug"]["http_code"] != "403") {
 899                         $last_failure = datetime_convert();
 900                         $failure = true;
 901                 }
 902                 $possible_failure = true;
 903         } elseif ($network == NETWORK_DIASPORA)
 904                 $last_contact = datetime_convert();
 905
 906         // If the server has no possible failure we reset the cached data
 907         if (!$possible_failure) {
 908                 $version = "";
 909                 $platform = "";
 910                 $site_name = "";
 911                 $info = "";
 912                 $register_policy = -1;
 913         }
 914
 915         // Look for poco
 916         if (!$failure) {
 917                 $serverret = z_fetch_url($server_url."/poco");
 918                 if ($serverret["success"]) {
 919                         $data = json_decode($serverret["body"]);
 920                         if (isset($data->totalResults)) {
 921                                 $poco = $server_url."/poco";
 922                                 $last_contact = datetime_convert();
 923
 924                                 $server = poco_detect_poco_data($data);
 925                                 if ($server) {
 926                                         $platform = $server['platform'];
 927                                         $network = $server['network'];
 928                                         $version = '';
 929                                         $site_name = '';
 930                                 }
 931                         }
 932                 }
 933         }
 934
 935         if (!$failure) {
 936                 // Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
 937                 $serverret = z_fetch_url($server_url);
 938
 939                 if (!$serverret["success"] OR ($serverret["body"] == "")) {
 940                         $last_failure = datetime_convert();
 941                         $failure = true;
 942                 } else {
 943                         $server = poco_detect_server_type($serverret["body"]);
 944                         if ($server) {
 945                                 $platform = $server['platform'];
 946                                 $network = $server['network'];
 947                                 $version = $server['version'];
 948                                 $site_name = $server['site_name'];
 949                                 $last_contact = datetime_convert();
 950                         }
 951
 952                         $lines = explode("\n",$serverret["header"]);
 953                         if(count($lines)) {
 954                                 foreach($lines as $line) {
 955                                         $line = trim($line);
 956                                         if(stristr($line,'X-Diaspora-Version:')) {
 957                                                 $platform = "Diaspora";
 958                                                 $version = trim(str_replace("X-Diaspora-Version:", "", $line));
 959                                                 $version = trim(str_replace("x-diaspora-version:", "", $version));
 960                                                 $network = NETWORK_DIASPORA;
 961                                                 $versionparts = explode("-", $version);
 962                                                 $version = $versionparts[0];
 963                                                 $last_contact = datetime_convert();
 964                                         }
 965
 966                                         if(stristr($line,'Server: Mastodon')) {
 967                                                 $platform = "Mastodon";
 968                                                 $network = NETWORK_OSTATUS;
 969                                                 // Mastodon doesn't reveal version numbers
 970                                                 $version = "";
 971                                                 $last_contact = datetime_convert();
 972                                         }
 973                                 }
 974                         }
 975                 }
 976         }
 977
 978         if (!$failure AND ($poco == "")) {
 979                 // Test for Statusnet
 980                 // Will also return data for Friendica and GNU Social - but it will be overwritten later
 981                 // The "not implemented" is a special treatment for really, really old Friendica versions
 982                 $serverret = z_fetch_url($server_url."/api/statusnet/version.json");
 983                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
 984                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
 985                         $platform = "StatusNet";
 986                         // Remove junk that some GNU Social servers return
 987                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
 988                         $version = trim($version, '"');
 989                         $network = NETWORK_OSTATUS;
 990                         $last_contact = datetime_convert();
 991                 }
 992
 993                 // Test for GNU Social
 994                 $serverret = z_fetch_url($server_url."/api/gnusocial/version.json");
 995                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
 996                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
 997                         $platform = "GNU Social";
 998                         // Remove junk that some GNU Social servers return
 999                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1000                         $version = trim($version, '"');
1001                         $network = NETWORK_OSTATUS;
1002                         $last_contact = datetime_convert();
1003                 }
1004         }
1005
1006         if (!$failure) {
1007                 // Test for Hubzilla, Redmatrix or Friendica
1008                 $serverret = z_fetch_url($server_url."/api/statusnet/config.json");
1009                 if ($serverret["success"]) {
1010                         $data = json_decode($serverret["body"]);
1011                         if (isset($data->site->server)) {
1012                                 $last_contact = datetime_convert();
1013
1014                                 if (isset($data->site->platform)) {
1015                                         $platform = $data->site->platform->PLATFORM_NAME;
1016                                         $version = $data->site->platform->STD_VERSION;
1017                                         $network = NETWORK_DIASPORA;
1018                                 }
1019                                 if (isset($data->site->BlaBlaNet)) {
1020                                         $platform = $data->site->BlaBlaNet->PLATFORM_NAME;
1021                                         $version = $data->site->BlaBlaNet->STD_VERSION;
1022                                         $network = NETWORK_DIASPORA;
1023                                 }
1024                                 if (isset($data->site->hubzilla)) {
1025                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
1026                                         $version = $data->site->hubzilla->RED_VERSION;
1027                                         $network = NETWORK_DIASPORA;
1028                                 }
1029                                 if (isset($data->site->redmatrix)) {
1030                                         if (isset($data->site->redmatrix->PLATFORM_NAME))
1031                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
1032                                         elseif (isset($data->site->redmatrix->RED_PLATFORM))
1033                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
1034
1035                                         $version = $data->site->redmatrix->RED_VERSION;
1036                                         $network = NETWORK_DIASPORA;
1037                                 }
1038                                 if (isset($data->site->friendica)) {
1039                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
1040                                         $version = $data->site->friendica->FRIENDICA_VERSION;
1041                                         $network = NETWORK_DFRN;
1042                                 }
1043
1044                                 $site_name = $data->site->name;
1045
1046                                 $data->site->closed = poco_to_boolean($data->site->closed);
1047                                 $data->site->private = poco_to_boolean($data->site->private);
1048                                 $data->site->inviteonly = poco_to_boolean($data->site->inviteonly);
1049
1050                                 if (!$data->site->closed AND !$data->site->private and $data->site->inviteonly)
1051                                         $register_policy = REGISTER_APPROVE;
1052                                 elseif (!$data->site->closed AND !$data->site->private)
1053                                         $register_policy = REGISTER_OPEN;
1054                                 else
1055                                         $register_policy = REGISTER_CLOSED;
1056                         }
1057                 }
1058         }
1059
1060
1061         // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
1062         if (!$failure) {
1063                 $serverret = z_fetch_url($server_url."/statistics.json");
1064                 if ($serverret["success"]) {
1065                         $data = json_decode($serverret["body"]);
1066                         if ($version == "")
1067                                 $version = $data->version;
1068
1069                         $site_name = $data->name;
1070
1071                         if (isset($data->network) AND ($platform == ""))
1072                                 $platform = $data->network;
1073
1074                         if ($platform == "Diaspora")
1075                                 $network = NETWORK_DIASPORA;
1076
1077                         if ($data->registrations_open)
1078                                 $register_policy = REGISTER_OPEN;
1079                         else
1080                                 $register_policy = REGISTER_CLOSED;
1081
1082                         if (isset($data->version))
1083                                 $last_contact = datetime_convert();
1084                 }
1085         }
1086
1087         // Check for noscrape
1088         // Friendica servers could be detected as OStatus servers
1089         if (!$failure AND in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
1090                 $serverret = z_fetch_url($server_url."/friendica/json");
1091
1092                 if (!$serverret["success"])
1093                         $serverret = z_fetch_url($server_url."/friendika/json");
1094
1095                 if ($serverret["success"]) {
1096                         $data = json_decode($serverret["body"]);
1097
1098                         if (isset($data->version)) {
1099                                 $last_contact = datetime_convert();
1100                                 $network = NETWORK_DFRN;
1101
1102                                 $noscrape = $data->no_scrape_url;
1103                                 $version = $data->version;
1104                                 $site_name = $data->site_name;
1105                                 $info = $data->info;
1106                                 $register_policy_str = $data->register_policy;
1107                                 $platform = $data->platform;
1108
1109                                 switch ($register_policy_str) {
1110                                         case "REGISTER_CLOSED":
1111                                                 $register_policy = REGISTER_CLOSED;
1112                                                 break;
1113                                         case "REGISTER_APPROVE":
1114                                                 $register_policy = REGISTER_APPROVE;
1115                                                 break;
1116                                         case "REGISTER_OPEN":
1117                                                 $register_policy = REGISTER_OPEN;
1118                                                 break;
1119                                 }
1120                         }
1121                 }
1122         }
1123
1124         if ($possible_failure AND !$failure) {
1125                 $last_failure = datetime_convert();
1126                 $failure = true;
1127         }
1128
1129         if ($failure) {
1130                 $last_contact = $orig_last_contact;
1131         } else {
1132                 $last_failure = $orig_last_failure;
1133         }
1134
1135         if (($last_contact <= $last_failure) AND !$failure) {
1136                 logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
1137         } else if (($last_contact >= $last_failure) AND $failure) {
1138                 logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
1139         }
1140
1141         // Check again if the server exists
1142         $servers = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1143
1144         $version = strip_tags($version);
1145         $site_name = strip_tags($site_name);
1146         $info = strip_tags($info);
1147         $platform = strip_tags($platform);
1148
1149         if ($servers) {
1150                  q("UPDATE `gserver` SET `url` = '%s', `version` = '%s', `site_name` = '%s', `info` = '%s', `register_policy` = %d, `poco` = '%s', `noscrape` = '%s',
1151                         `network` = '%s', `platform` = '%s', `last_contact` = '%s', `last_failure` = '%s' WHERE `nurl` = '%s'",
1152                         dbesc($server_url),
1153                         dbesc($version),
1154                         dbesc($site_name),
1155                         dbesc($info),
1156                         intval($register_policy),
1157                         dbesc($poco),
1158                         dbesc($noscrape),
1159                         dbesc($network),
1160                         dbesc($platform),
1161                         dbesc($last_contact),
1162                         dbesc($last_failure),
1163                         dbesc(normalise_link($server_url))
1164                 );
1165         } elseif (!$failure)
1166                 q("INSERT INTO `gserver` (`url`, `nurl`, `version`, `site_name`, `info`, `register_policy`, `poco`, `noscrape`, `network`, `platform`, `created`, `last_contact`, `last_failure`)
1167                                         VALUES ('%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s')",
1168                                 dbesc($server_url),
1169                                 dbesc(normalise_link($server_url)),
1170                                 dbesc($version),
1171                                 dbesc($site_name),
1172                                 dbesc($info),
1173                                 intval($register_policy),
1174                                 dbesc($poco),
1175                                 dbesc($noscrape),
1176                                 dbesc($network),
1177                                 dbesc($platform),
1178                                 dbesc(datetime_convert()),
1179                                 dbesc($last_contact),
1180                                 dbesc($last_failure),
1181                                 dbesc(datetime_convert())
1182                 );
1183
1184         logger("End discovery for server ".$server_url, LOGGER_DEBUG);
1185
1186         return !$failure;
1187 }
1188
1189 function count_common_friends($uid,$cid) {
1190
1191         $r = q("SELECT count(*) as `total`
1192                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1193                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1194                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1195                 AND `gcontact`.`nurl` IN (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 and id != %d ) ",
1196                 intval($cid),
1197                 intval($uid),
1198                 intval($uid),
1199                 intval($cid)
1200         );
1201
1202 //      logger("count_common_friends: $uid $cid {$r[0]['total']}");
1203         if (dbm::is_result($r))
1204                 return $r[0]['total'];
1205         return 0;
1206
1207 }
1208
1209
1210 function common_friends($uid,$cid,$start = 0,$limit=9999,$shuffle = false) {
1211
1212         if($shuffle)
1213                 $sql_extra = " order by rand() ";
1214         else
1215                 $sql_extra = " order by `gcontact`.`name` asc ";
1216
1217         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1218                 FROM `glink`
1219                 INNER JOIN `gcontact` ON `glink`.`gcid` = `gcontact`.`id`
1220                 INNER JOIN `contact` ON `gcontact`.`nurl` = `contact`.`nurl`
1221                 WHERE `glink`.`cid` = %d and `glink`.`uid` = %d
1222                         AND `contact`.`uid` = %d AND `contact`.`self` = 0 AND `contact`.`blocked` = 0
1223                         AND `contact`.`hidden` = 0 AND `contact`.`id` != %d
1224                         AND ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1225                         $sql_extra LIMIT %d, %d",
1226                 intval($cid),
1227                 intval($uid),
1228                 intval($uid),
1229                 intval($cid),
1230                 intval($start),
1231                 intval($limit)
1232         );
1233
1234         return $r;
1235
1236 }
1237
1238
1239 function count_common_friends_zcid($uid,$zcid) {
1240
1241         $r = q("SELECT count(*) as `total`
1242                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1243                 where `glink`.`zcid` = %d
1244                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 ) ",
1245                 intval($zcid),
1246                 intval($uid)
1247         );
1248
1249         if (dbm::is_result($r))
1250                 return $r[0]['total'];
1251         return 0;
1252
1253 }
1254
1255 function common_friends_zcid($uid,$zcid,$start = 0, $limit = 9999,$shuffle = false) {
1256
1257         if($shuffle)
1258                 $sql_extra = " order by rand() ";
1259         else
1260                 $sql_extra = " order by `gcontact`.`name` asc ";
1261
1262         $r = q("SELECT `gcontact`.*
1263                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1264                 where `glink`.`zcid` = %d
1265                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 )
1266                 $sql_extra limit %d, %d",
1267                 intval($zcid),
1268                 intval($uid),
1269                 intval($start),
1270                 intval($limit)
1271         );
1272
1273         return $r;
1274
1275 }
1276
1277
1278 function count_all_friends($uid,$cid) {
1279
1280         $r = q("SELECT count(*) as `total`
1281                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1282                 where `glink`.`cid` = %d and `glink`.`uid` = %d AND
1283                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))",
1284                 intval($cid),
1285                 intval($uid)
1286         );
1287
1288         if (dbm::is_result($r))
1289                 return $r[0]['total'];
1290         return 0;
1291
1292 }
1293
1294
1295 function all_friends($uid,$cid,$start = 0, $limit = 80) {
1296
1297         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1298                 FROM `glink`
1299                 INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1300                 LEFT JOIN `contact` ON `contact`.`nurl` = `gcontact`.`nurl` AND `contact`.`uid` = %d
1301                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1302                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1303                 ORDER BY `gcontact`.`name` ASC LIMIT %d, %d ",
1304                 intval($uid),
1305                 intval($cid),
1306                 intval($uid),
1307                 intval($start),
1308                 intval($limit)
1309         );
1310
1311         return $r;
1312 }
1313
1314
1315
1316 function suggestion_query($uid, $start = 0, $limit = 80) {
1317
1318         if (!$uid) {
1319                 return array();
1320         }
1321
1322 // Uncommented because the result of the queries are to big to store it in the cache.
1323 // We need to decide if we want to change the db column type or if we want to delete it.
1324 //      $list = Cache::get("suggestion_query:".$uid.":".$start.":".$limit);
1325 //      if (!is_null($list)) {
1326 //              return $list;
1327 //      }
1328
1329         $network = array(NETWORK_DFRN);
1330
1331         if (get_config('system','diaspora_enabled'))
1332                 $network[] = NETWORK_DIASPORA;
1333
1334         if (!get_config('system','ostatus_disabled'))
1335                 $network[] = NETWORK_OSTATUS;
1336
1337         $sql_network = implode("', '", $network);
1338         $sql_network = "'".$sql_network."'";
1339
1340         /// @todo This query is really slow
1341         // By now we cache the data for five minutes
1342         $r = q("SELECT count(glink.gcid) as `total`, gcontact.* from gcontact
1343                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1344                 where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
1345                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1346                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1347                 AND `gcontact`.`updated` != '0000-00-00 00:00:00'
1348                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1349                 AND `gcontact`.`network` IN (%s)
1350                 GROUP BY `glink`.`gcid` ORDER BY `gcontact`.`updated` DESC,`total` DESC LIMIT %d, %d",
1351                 intval($uid),
1352                 intval($uid),
1353                 intval($uid),
1354                 intval($uid),
1355                 $sql_network,
1356                 intval($start),
1357                 intval($limit)
1358         );
1359
1360         if (dbm::is_result($r) && count($r) >= ($limit -1)) {
1361 // Uncommented because the result of the queries are to big to store it in the cache.
1362 // We need to decide if we want to change the db column type or if we want to delete it.
1363 //              Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $r, CACHE_FIVE_MINUTES);
1364
1365                 return $r;
1366         }
1367
1368         $r2 = q("SELECT gcontact.* FROM gcontact
1369                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1370                 WHERE `glink`.`uid` = 0 AND `glink`.`cid` = 0 AND `glink`.`zcid` = 0 AND NOT `gcontact`.`nurl` IN (SELECT `nurl` FROM `contact` WHERE `uid` = %d)
1371                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1372                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1373                 AND `gcontact`.`updated` != '0000-00-00 00:00:00'
1374                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1375                 AND `gcontact`.`network` IN (%s)
1376                 ORDER BY rand() LIMIT %d, %d",
1377                 intval($uid),
1378                 intval($uid),
1379                 intval($uid),
1380                 $sql_network,
1381                 intval($start),
1382                 intval($limit)
1383         );
1384
1385         $list = array();
1386         foreach ($r2 AS $suggestion)
1387                 $list[$suggestion["nurl"]] = $suggestion;
1388
1389         foreach ($r AS $suggestion)
1390                 $list[$suggestion["nurl"]] = $suggestion;
1391
1392         while (sizeof($list) > ($limit))
1393                 array_pop($list);
1394
1395 // Uncommented because the result of the queries are to big to store it in the cache.
1396 // We need to decide if we want to change the db column type or if we want to delete it.
1397 //      Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $list, CACHE_FIVE_MINUTES);
1398         return $list;
1399 }
1400
1401 function update_suggestions() {
1402
1403         $a = get_app();
1404
1405         $done = array();
1406
1407         /// @TODO Check if it is really neccessary to poll the own server
1408         poco_load(0,0,0,App::get_baseurl() . '/poco');
1409
1410         $done[] = App::get_baseurl() . '/poco';
1411
1412         if (strlen(get_config('system','directory'))) {
1413                 $x = fetch_url(get_server()."/pubsites");
1414                 if ($x) {
1415                         $j = json_decode($x);
1416                         if ($j->entries) {
1417                                 foreach ($j->entries as $entry) {
1418
1419                                         poco_check_server($entry->url);
1420
1421                                         $url = $entry->url . '/poco';
1422                                         if (! in_array($url,$done)) {
1423                                                 poco_load(0,0,0,$entry->url . '/poco');
1424                                         }
1425                                 }
1426                         }
1427                 }
1428         }
1429
1430         // Query your contacts from Friendica and Redmatrix/Hubzilla for their contacts
1431         $r = q("SELECT DISTINCT(`poco`) AS `poco` FROM `contact` WHERE `network` IN ('%s', '%s')",
1432                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA)
1433         );
1434
1435         if (dbm::is_result($r)) {
1436                 foreach ($r as $rr) {
1437                         $base = substr($rr['poco'],0,strrpos($rr['poco'],'/'));
1438                         if(! in_array($base,$done))
1439                                 poco_load(0,0,0,$base);
1440                 }
1441         }
1442 }
1443
1444 /**
1445  * @brief Fetch server list from remote servers and adds them when they are new.
1446  *
1447  * @param string $poco URL to the POCO endpoint
1448  */
1449 function poco_fetch_serverlist($poco) {
1450         $serverret = z_fetch_url($poco."/@server");
1451         if (!$serverret["success"]) {
1452                 return;
1453         }
1454         $serverlist = json_decode($serverret['body']);
1455
1456         if (!is_array($serverlist)) {
1457                 return;
1458         }
1459
1460         foreach ($serverlist AS $server) {
1461                 $server_url = str_replace("/index.php", "", $server->url);
1462
1463                 $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1464                 if (!dbm::is_result($r)) {
1465                         logger("Call server check for server ".$server_url, LOGGER_DEBUG);
1466                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode($server_url));
1467                 }
1468         }
1469 }
1470
1471 function poco_discover_federation() {
1472         $last = get_config('poco','last_federation_discovery');
1473
1474         if ($last) {
1475                 $next = $last + (24 * 60 * 60);
1476                 if($next > time())
1477                         return;
1478         }
1479
1480         // Discover Friendica, Hubzilla and Diaspora servers
1481         $serverdata = fetch_url("http://the-federation.info/pods.json");
1482
1483         if ($serverdata) {
1484                 $servers = json_decode($serverdata);
1485
1486                 foreach ($servers->pods AS $server) {
1487                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode("https://".$server->host));
1488                 }
1489         }
1490
1491         // Currently disabled, since the service isn't available anymore.
1492         // It is not removed since I hope that there will be a successor.
1493         // Discover GNU Social Servers.
1494         //if (!get_config('system','ostatus_disabled')) {
1495         //      $serverdata = "http://gstools.org/api/get_open_instances/";
1496
1497         //      $result = z_fetch_url($serverdata);
1498         //      if ($result["success"]) {
1499         //              $servers = json_decode($result["body"]);
1500
1501         //              foreach($servers->data AS $server)
1502         //                      poco_check_server($server->instance_address);
1503         //      }
1504         //}
1505
1506         set_config('poco','last_federation_discovery', time());
1507 }
1508
1509 function poco_discover($complete = false) {
1510
1511         // Update the server list
1512         poco_discover_federation();
1513
1514         $no_of_queries = 5;
1515
1516         $requery_days = intval(get_config("system", "poco_requery_days"));
1517
1518         if ($requery_days == 0)
1519                 $requery_days = 7;
1520
1521         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1522
1523         $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1524         if ($r)
1525                 foreach ($r AS $server) {
1526
1527                         if (!poco_check_server($server["url"], $server["network"])) {
1528                                 // The server is not reachable? Okay, then we will try it later
1529                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1530                                 continue;
1531                         }
1532
1533                         // Discover new servers out there
1534                         poco_fetch_serverlist($server["poco"]);
1535
1536                         // Fetch all users from the other server
1537                         $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1538
1539                         logger("Fetch all users from the server ".$server["nurl"], LOGGER_DEBUG);
1540
1541                         $retdata = z_fetch_url($url);
1542                         if ($retdata["success"]) {
1543                                 $data = json_decode($retdata["body"]);
1544
1545                                 poco_discover_server($data, 2);
1546
1547                                 if (get_config('system','poco_discovery') > 1) {
1548
1549                                         $timeframe = get_config('system','poco_discovery_since');
1550                                         if ($timeframe == 0)
1551                                                 $timeframe = 30;
1552
1553                                         $updatedSince = date("Y-m-d H:i:s", time() - $timeframe * 86400);
1554
1555                                         // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1556                                         $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1557
1558                                         $success = false;
1559
1560                                         $retdata = z_fetch_url($url);
1561                                         if ($retdata["success"]) {
1562                                                 logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1563                                                 $success = poco_discover_server(json_decode($retdata["body"]));
1564                                         }
1565
1566                                         if (!$success AND (get_config('system','poco_discovery') > 2)) {
1567                                                 logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1568                                                 poco_discover_server_users($data, $server);
1569                                         }
1570                                 }
1571
1572                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1573                                 if (!$complete AND (--$no_of_queries == 0))
1574                                         break;
1575                         } else {
1576                                 // If the server hadn't replied correctly, then force a sanity check
1577                                 poco_check_server($server["url"], $server["network"], true);
1578
1579                                 // If we couldn't reach the server, we will try it some time later
1580                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1581                         }
1582                 }
1583 }
1584
1585 function poco_discover_server_users($data, $server) {
1586
1587         if (!isset($data->entry))
1588                 return;
1589
1590         foreach ($data->entry AS $entry) {
1591                 $username = "";
1592                 if (isset($entry->urls)) {
1593                         foreach($entry->urls as $url)
1594                                 if ($url->type == 'profile') {
1595                                         $profile_url = $url->value;
1596                                         $urlparts = parse_url($profile_url);
1597                                         $username = end(explode("/", $urlparts["path"]));
1598                                 }
1599                 }
1600                 if ($username != "") {
1601                         logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1602
1603                         // Fetch all contacts from a given user from the other server
1604                         $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1605
1606                         $retdata = z_fetch_url($url);
1607                         if ($retdata["success"])
1608                                 poco_discover_server(json_decode($retdata["body"]), 3);
1609                 }
1610         }
1611 }
1612
1613 function poco_discover_server($data, $default_generation = 0) {
1614
1615         if (!isset($data->entry) OR !count($data->entry))
1616                 return false;
1617
1618         $success = false;
1619
1620         foreach ($data->entry AS $entry) {
1621                 $profile_url = '';
1622                 $profile_photo = '';
1623                 $connect_url = '';
1624                 $name = '';
1625                 $network = '';
1626                 $updated = '0000-00-00 00:00:00';
1627                 $location = '';
1628                 $about = '';
1629                 $keywords = '';
1630                 $gender = '';
1631                 $contact_type = -1;
1632                 $generation = $default_generation;
1633
1634                 $name = $entry->displayName;
1635
1636                 if (isset($entry->urls)) {
1637                         foreach($entry->urls as $url) {
1638                                 if ($url->type == 'profile') {
1639                                         $profile_url = $url->value;
1640                                         continue;
1641                                 }
1642                                 if ($url->type == 'webfinger') {
1643                                         $connect_url = str_replace('acct:' , '', $url->value);
1644                                         continue;
1645                                 }
1646                         }
1647                 }
1648
1649                 if (isset($entry->photos)) {
1650                         foreach ($entry->photos as $photo) {
1651                                 if ($photo->type == 'profile') {
1652                                         $profile_photo = $photo->value;
1653                                         continue;
1654                                 }
1655                         }
1656                 }
1657
1658                 if (isset($entry->updated)) {
1659                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
1660                 }
1661
1662                 if(isset($entry->network)) {
1663                         $network = $entry->network;
1664                 }
1665
1666                 if(isset($entry->currentLocation)) {
1667                         $location = $entry->currentLocation;
1668                 }
1669
1670                 if(isset($entry->aboutMe)) {
1671                         $about = html2bbcode($entry->aboutMe);
1672                 }
1673
1674                 if(isset($entry->gender)) {
1675                         $gender = $entry->gender;
1676                 }
1677
1678                 if(isset($entry->generation) AND ($entry->generation > 0)) {
1679                         $generation = ++$entry->generation;
1680                 }
1681
1682                 if(isset($entry->contactType) AND ($entry->contactType >= 0)) {
1683                         $contact_type = $entry->contactType;
1684                 }
1685
1686                 if(isset($entry->tags)) {
1687                         foreach ($entry->tags as $tag) {
1688                                 $keywords = implode(", ", $tag);
1689                         }
1690                 }
1691
1692                 if ($generation > 0) {
1693                         $success = true;
1694
1695                         logger("Store profile ".$profile_url, LOGGER_DEBUG);
1696                         poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, 0, 0, 0);
1697
1698                         $gcontact = array("url" => $profile_url, "contact-type" => $contact_type, "generation" => $generation);
1699                         update_gcontact($gcontact);
1700
1701                         logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1702                 }
1703         }
1704         return $success;
1705 }
1706
1707 /**
1708  * @brief Removes unwanted parts from a contact url
1709  *
1710  * @param string $url Contact url
1711  * @return string Contact url with the wanted parts
1712  */
1713 function clean_contact_url($url) {
1714         $parts = parse_url($url);
1715
1716         if (!isset($parts["scheme"]) OR !isset($parts["host"]))
1717                 return $url;
1718
1719         $new_url = $parts["scheme"]."://".$parts["host"];
1720
1721         if (isset($parts["port"]))
1722                 $new_url .= ":".$parts["port"];
1723
1724         if (isset($parts["path"]))
1725                 $new_url .= $parts["path"];
1726
1727         if ($new_url != $url)
1728                 logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".App::callstack(), LOGGER_DEBUG);
1729
1730         return $new_url;
1731 }
1732
1733 /**
1734  * @brief Replace alternate OStatus user format with the primary one
1735  *
1736  * @param arr $contact contact array (called by reference)
1737  */
1738 function fix_alternate_contact_address(&$contact) {
1739         if (($contact["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($contact["url"])) {
1740                 $data = probe_url($contact["url"]);
1741                 if ($contact["network"] == NETWORK_OSTATUS) {
1742                         logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1743                         $contact["url"] = $data["url"];
1744                         $contact["addr"] = $data["addr"];
1745                         $contact["alias"] = $data["alias"];
1746                         $contact["server_url"] = $data["baseurl"];
1747                 }
1748         }
1749 }
1750
1751 /**
1752  * @brief Fetch the gcontact id, add an entry if not existed
1753  *
1754  * @param arr $contact contact array
1755  * @return bool|int Returns false if not found, integer if contact was found
1756  */
1757 function get_gcontact_id($contact) {
1758
1759         $gcontact_id = 0;
1760         $doprobing = false;
1761
1762         if (in_array($contact["network"], array(NETWORK_PHANTOM))) {
1763                 logger("Invalid network for contact url ".$contact["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1764                 return false;
1765         }
1766
1767         if ($contact["network"] == NETWORK_STATUSNET)
1768                 $contact["network"] = NETWORK_OSTATUS;
1769
1770         // All new contacts are hidden by default
1771         if (!isset($contact["hide"]))
1772                 $contact["hide"] = true;
1773
1774         // Replace alternate OStatus user format with the primary one
1775         fix_alternate_contact_address($contact);
1776
1777         // Remove unwanted parts from the contact url (e.g. "?zrl=...")
1778         if (in_array($contact["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)))
1779                 $contact["url"] = clean_contact_url($contact["url"]);
1780
1781         $r = q("SELECT `id`, `last_contact`, `last_failure`, `network` FROM `gcontact` WHERE `nurl` = '%s' LIMIT 2",
1782                 dbesc(normalise_link($contact["url"])));
1783
1784         if ($r) {
1785                 $gcontact_id = $r[0]["id"];
1786
1787                 // Update every 90 days
1788                 if (in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
1789                         $last_failure_str = $r[0]["last_failure"];
1790                         $last_failure = strtotime($r[0]["last_failure"]);
1791                         $last_contact_str = $r[0]["last_contact"];
1792                         $last_contact = strtotime($r[0]["last_contact"]);
1793                         $doprobing = (((time() - $last_contact) > (90 * 86400)) AND ((time() - $last_failure) > (90 * 86400)));
1794                 }
1795         } else {
1796                 q("INSERT INTO `gcontact` (`name`, `nick`, `addr` , `network`, `url`, `nurl`, `photo`, `created`, `updated`, `location`, `about`, `hide`, `generation`)
1797                         VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d)",
1798                         dbesc($contact["name"]),
1799                         dbesc($contact["nick"]),
1800                         dbesc($contact["addr"]),
1801                         dbesc($contact["network"]),
1802                         dbesc($contact["url"]),
1803                         dbesc(normalise_link($contact["url"])),
1804                         dbesc($contact["photo"]),
1805                         dbesc(datetime_convert()),
1806                         dbesc(datetime_convert()),
1807                         dbesc($contact["location"]),
1808                         dbesc($contact["about"]),
1809                         intval($contact["hide"]),
1810                         intval($contact["generation"])
1811                 );
1812
1813                 $r = q("SELECT `id`, `network` FROM `gcontact` WHERE `nurl` = '%s' ORDER BY `id` LIMIT 2",
1814                         dbesc(normalise_link($contact["url"])));
1815
1816                 if ($r) {
1817                         $gcontact_id = $r[0]["id"];
1818
1819                         $doprobing = in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""));
1820                 }
1821         }
1822
1823         if ($doprobing) {
1824                 logger("Last Contact: ". $last_contact_str." - Last Failure: ".$last_failure_str." - Checking: ".$contact["url"], LOGGER_DEBUG);
1825                 proc_run(PRIORITY_LOW, 'include/gprobe.php', bin2hex($contact["url"]));
1826         }
1827
1828         if ((dbm::is_result($r)) AND (count($r) > 1) AND ($gcontact_id > 0) AND ($contact["url"] != ""))
1829          q("DELETE FROM `gcontact` WHERE `nurl` = '%s' AND `id` != %d",
1830                 dbesc(normalise_link($contact["url"])),
1831                 intval($gcontact_id));
1832
1833         return $gcontact_id;
1834 }
1835
1836 /**
1837  * @brief Updates the gcontact table from a given array
1838  *
1839  * @param arr $contact contact array
1840  * @return bool|int Returns false if not found, integer if contact was found
1841  */
1842 function update_gcontact($contact) {
1843
1844         // Check for invalid "contact-type" value
1845         if (isset($contact['contact-type']) AND (intval($contact['contact-type']) < 0)) {
1846                 $contact['contact-type'] = 0;
1847         }
1848
1849         /// @todo update contact table as well
1850
1851         $gcontact_id = get_gcontact_id($contact);
1852
1853         if (!$gcontact_id)
1854                 return false;
1855
1856         $r = q("SELECT `name`, `nick`, `photo`, `location`, `about`, `addr`, `generation`, `birthday`, `gender`, `keywords`,
1857                         `contact-type`, `hide`, `nsfw`, `network`, `alias`, `notify`, `server_url`, `connect`, `updated`, `url`
1858                 FROM `gcontact` WHERE `id` = %d LIMIT 1",
1859                 intval($gcontact_id));
1860
1861         // Get all field names
1862         $fields = array();
1863         foreach ($r[0] AS $field => $data)
1864                 $fields[$field] = $data;
1865
1866         unset($fields["url"]);
1867         unset($fields["updated"]);
1868         unset($fields["hide"]);
1869
1870         // Bugfix: We had an error in the storing of keywords which lead to the "0"
1871         // This value is still transmitted via poco.
1872         if ($contact["keywords"] == "0")
1873                 unset($contact["keywords"]);
1874
1875         if ($r[0]["keywords"] == "0")
1876                 $r[0]["keywords"] = "";
1877
1878         // assign all unassigned fields from the database entry
1879         foreach ($fields AS $field => $data)
1880                 if (!isset($contact[$field]) OR ($contact[$field] == ""))
1881                         $contact[$field] = $r[0][$field];
1882
1883         if (!isset($contact["hide"]))
1884                 $contact["hide"] = $r[0]["hide"];
1885
1886         $fields["hide"] = $r[0]["hide"];
1887
1888         if ($contact["network"] == NETWORK_STATUSNET)
1889                 $contact["network"] = NETWORK_OSTATUS;
1890
1891         // Replace alternate OStatus user format with the primary one
1892         fix_alternate_contact_address($contact);
1893
1894         if (!isset($contact["updated"]))
1895                 $contact["updated"] = datetime_convert();
1896
1897         if ($contact["server_url"] == "") {
1898                 $server_url = $contact["url"];
1899
1900                 $server_url = matching_url($server_url, $contact["alias"]);
1901                 if ($server_url != "")
1902                         $contact["server_url"] = $server_url;
1903
1904                 $server_url = matching_url($server_url, $contact["photo"]);
1905                 if ($server_url != "")
1906                         $contact["server_url"] = $server_url;
1907
1908                 $server_url = matching_url($server_url, $contact["notify"]);
1909                 if ($server_url != "")
1910                         $contact["server_url"] = $server_url;
1911         } else
1912                 $contact["server_url"] = normalise_link($contact["server_url"]);
1913
1914         if (($contact["addr"] == "") AND ($contact["server_url"] != "") AND ($contact["nick"] != "")) {
1915                 $hostname = str_replace("http://", "", $contact["server_url"]);
1916                 $contact["addr"] = $contact["nick"]."@".$hostname;
1917         }
1918
1919         // Check if any field changed
1920         $update = false;
1921         unset($fields["generation"]);
1922
1923         if ((($contact["generation"] > 0) AND ($contact["generation"] <= $r[0]["generation"])) OR ($r[0]["generation"] == 0)) {
1924                 foreach ($fields AS $field => $data)
1925                         if ($contact[$field] != $r[0][$field]) {
1926                                 logger("Difference for contact ".$contact["url"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
1927                                 $update = true;
1928                         }
1929
1930                 if ($contact["generation"] < $r[0]["generation"]) {
1931                         logger("Difference for contact ".$contact["url"]." in field 'generation'. new value: '".$contact["generation"]."', old value '".$r[0]["generation"]."'", LOGGER_DEBUG);
1932                         $update = true;
1933                 }
1934         }
1935
1936         if ($update) {
1937                 logger("Update gcontact for ".$contact["url"], LOGGER_DEBUG);
1938
1939                 q("UPDATE `gcontact` SET `photo` = '%s', `name` = '%s', `nick` = '%s', `addr` = '%s', `network` = '%s',
1940                                         `birthday` = '%s', `gender` = '%s', `keywords` = '%s', `hide` = %d, `nsfw` = %d,
1941                                         `contact-type` = %d, `alias` = '%s', `notify` = '%s', `url` = '%s',
1942                                         `location` = '%s', `about` = '%s', `generation` = %d, `updated` = '%s',
1943                                         `server_url` = '%s', `connect` = '%s'
1944                                 WHERE `nurl` = '%s' AND (`generation` = 0 OR `generation` >= %d)",
1945                         dbesc($contact["photo"]), dbesc($contact["name"]), dbesc($contact["nick"]),
1946                         dbesc($contact["addr"]), dbesc($contact["network"]), dbesc($contact["birthday"]),
1947                         dbesc($contact["gender"]), dbesc($contact["keywords"]), intval($contact["hide"]),
1948                         intval($contact["nsfw"]), intval($contact["contact-type"]), dbesc($contact["alias"]),
1949                         dbesc($contact["notify"]), dbesc($contact["url"]), dbesc($contact["location"]),
1950                         dbesc($contact["about"]), intval($contact["generation"]), dbesc($contact["updated"]),
1951                         dbesc($contact["server_url"]), dbesc($contact["connect"]),
1952                         dbesc(normalise_link($contact["url"])), intval($contact["generation"]));
1953
1954
1955                 // Now update the contact entry with the user id "0" as well.
1956                 // This is used for the shadow copies of public items.
1957                 $r = q("SELECT `id` FROM `contact` WHERE `nurl` = '%s' AND `uid` = 0 ORDER BY `id` LIMIT 1",
1958                         dbesc(normalise_link($contact["url"])));
1959
1960                 if ($r) {
1961                         logger("Update shadow contact ".$r[0]["id"], LOGGER_DEBUG);
1962
1963                         update_contact_avatar($contact["photo"], 0, $r[0]["id"]);
1964
1965                         q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s',
1966                                                 `network` = '%s', `bd` = '%s', `gender` = '%s',
1967                                                 `keywords` = '%s', `alias` = '%s', `contact-type` = %d,
1968                                                 `url` = '%s', `location` = '%s', `about` = '%s'
1969                                         WHERE `id` = %d",
1970                                 dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["addr"]),
1971                                 dbesc($contact["network"]), dbesc($contact["birthday"]), dbesc($contact["gender"]),
1972                                 dbesc($contact["keywords"]), dbesc($contact["alias"]), intval($contact["contact-type"]),
1973                                 dbesc($contact["url"]), dbesc($contact["location"]), dbesc($contact["about"]),
1974                                 intval($r[0]["id"]));
1975                 }
1976         }
1977
1978         return $gcontact_id;
1979 }
1980
1981 /**
1982  * @brief Updates the gcontact entry from probe
1983  *
1984  * @param str $url profile link
1985  */
1986 function update_gcontact_from_probe($url) {
1987         $data = probe_url($url);
1988
1989         if (in_array($data["network"], array(NETWORK_PHANTOM))) {
1990                 logger("Invalid network for contact url ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1991                 return;
1992         }
1993
1994         update_gcontact($data);
1995 }
1996
1997 /**
1998  * @brief Update the gcontact entry for a given user id
1999  *
2000  * @param int $uid User ID
2001  */
2002 function update_gcontact_for_user($uid) {
2003         $r = q("SELECT `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
2004                         `profile`.`name`, `profile`.`about`, `profile`.`gender`,
2005                         `profile`.`pub_keywords`, `profile`.`dob`, `profile`.`photo`,
2006                         `profile`.`net-publish`, `user`.`nickname`, `user`.`hidewall`,
2007                         `contact`.`notify`, `contact`.`url`, `contact`.`addr`
2008                 FROM `profile`
2009                         INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
2010                         INNER JOIN `contact` ON `contact`.`uid` = `profile`.`uid`
2011                 WHERE `profile`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self`",
2012                 intval($uid));
2013
2014         $location = formatted_location(array("locality" => $r[0]["locality"], "region" => $r[0]["region"],
2015                                                 "country-name" => $r[0]["country-name"]));
2016
2017         // The "addr" field was added in 3.4.3 so it can be empty for older users
2018         if ($r[0]["addr"] != "")
2019                 $addr = $r[0]["nickname"].'@'.str_replace(array("http://", "https://"), "", App::get_baseurl());
2020         else
2021                 $addr = $r[0]["addr"];
2022
2023         $gcontact = array("name" => $r[0]["name"], "location" => $location, "about" => $r[0]["about"],
2024                         "gender" => $r[0]["gender"], "keywords" => $r[0]["pub_keywords"],
2025                         "birthday" => $r[0]["dob"], "photo" => $r[0]["photo"],
2026                         "notify" => $r[0]["notify"], "url" => $r[0]["url"],
2027                         "hide" => ($r[0]["hidewall"] OR !$r[0]["net-publish"]),
2028                         "nick" => $r[0]["nickname"], "addr" => $addr,
2029                         "connect" => $addr, "server_url" => App::get_baseurl(),
2030                         "generation" => 1, "network" => NETWORK_DFRN);
2031
2032         update_gcontact($gcontact);
2033 }
2034
2035 /**
2036  * @brief Fetches users of given GNU Social server
2037  *
2038  * If the "Statistics" plugin is enabled (See http://gstools.org/ for details) we query user data with this.
2039  *
2040  * @param str $server Server address
2041  */
2042 function gs_fetch_users($server) {
2043
2044         logger("Fetching users from GNU Social server ".$server, LOGGER_DEBUG);
2045
2046         $url = $server."/main/statistics";
2047
2048         $result = z_fetch_url($url);
2049         if (!$result["success"])
2050                 return false;
2051
2052         $statistics = json_decode($result["body"]);
2053
2054         if (is_object($statistics->config)) {
2055                 if ($statistics->config->instance_with_ssl)
2056                         $server = "https://";
2057                 else
2058                         $server = "http://";
2059
2060                 $server .= $statistics->config->instance_address;
2061
2062                 $hostname = $statistics->config->instance_address;
2063         } else {
2064                 if ($statistics->instance_with_ssl)
2065                         $server = "https://";
2066                 else
2067                         $server = "http://";
2068
2069                 $server .= $statistics->instance_address;
2070
2071                 $hostname = $statistics->instance_address;
2072         }
2073
2074         if (is_object($statistics->users))
2075                 foreach ($statistics->users AS $nick => $user) {
2076                         $profile_url = $server."/".$user->nickname;
2077
2078                         $contact = array("url" => $profile_url,
2079                                         "name" => $user->fullname,
2080                                         "addr" => $user->nickname."@".$hostname,
2081                                         "nick" => $user->nickname,
2082                                         "about" => $user->bio,
2083                                         "network" => NETWORK_OSTATUS,
2084                                         "photo" => App::get_baseurl()."/images/person-175.jpg");
2085                         get_gcontact_id($contact);
2086                 }
2087 }
2088
2089 /**
2090  * @brief Asking GNU Social server on a regular base for their user data
2091  *
2092  */
2093 function gs_discover() {
2094
2095         $requery_days = intval(get_config("system", "poco_requery_days"));
2096
2097         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
2098
2099         $r = q("SELECT `nurl`, `url` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `network` = '%s' AND `last_poco_query` < '%s' ORDER BY RAND() LIMIT 5",
2100                 dbesc(NETWORK_OSTATUS), dbesc($last_update));
2101
2102         if (!$r)
2103                 return;
2104
2105         foreach ($r AS $server) {
2106                 gs_fetch_users($server["url"]);
2107                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
2108         }
2109 }
2110
2111 /**
2112  * @brief Returns a list of all known servers
2113  * @return array List of server urls
2114  */
2115 function poco_serverlist() {
2116         $r = q("SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
2117                 WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
2118                 ORDER BY `last_contact`
2119                 LIMIT 1000",
2120                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA), dbesc(NETWORK_OSTATUS));
2121         if (!dbm::is_result($r)) {
2122                 return false;
2123         }
2124         return $r;
2125 }
2126 ?>