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