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  * @brief Fetch POCO data
  19  *
  20  * @param integer $cid Contact ID
  21  * @param integer $uid User ID
  22  * @param integer $zcid Global Contact ID
  23  * @param integer $url POCO address that should be polled
  24  *
  25  * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  26  * and add the entries to the gcontact (Global Contact) table, or update existing entries
  27  * if anything (name or photo) has changed.
  28  * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  29  *
  30  * Once the global contact is stored add (if necessary) the contact linkage which associates
  31  * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  32  * pointing to the same global contact id.
  33  *
  34  */
  35 function poco_load($cid, $uid = 0, $zcid = 0, $url = null) {
  36         // Call the function "poco_load_worker" via the worker
  37         proc_run(PRIORITY_LOW, "include/discover_poco.php", "poco_load", intval($cid), intval($uid), intval($zcid), base64_encode($url));
  38 }
  39
  40 /**
  41  * @brief Fetch POCO data from the worker
  42  *
  43  * @param integer $cid Contact ID
  44  * @param integer $uid User ID
  45  * @param integer $zcid Global Contact ID
  46  * @param integer $url POCO address that should be polled
  47  *
  48  */
  49 function poco_load_worker($cid, $uid, $zcid, $url) {
  50         $a = get_app();
  51
  52         if($cid) {
  53                 if((! $url) || (! $uid)) {
  54                         $r = q("select `poco`, `uid` from `contact` where `id` = %d limit 1",
  55                                 intval($cid)
  56                         );
  57                         if (dbm::is_result($r)) {
  58                                 $url = $r[0]['poco'];
  59                                 $uid = $r[0]['uid'];
  60                         }
  61                 }
  62                 if(! $uid)
  63                         return;
  64         }
  65
  66         if(! $url)
  67                 return;
  68
  69         $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') ;
  70
  71         logger('poco_load: ' . $url, LOGGER_DEBUG);
  72
  73         $s = fetch_url($url);
  74
  75         logger('poco_load: returns ' . $s, LOGGER_DATA);
  76
  77         logger('poco_load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);
  78
  79         if(($a->get_curl_code() > 299) || (! $s))
  80                 return;
  81
  82         $j = json_decode($s);
  83
  84         logger('poco_load: json: ' . print_r($j,true),LOGGER_DATA);
  85
  86         if(! isset($j->entry))
  87                 return;
  88
  89         $total = 0;
  90         foreach($j->entry as $entry) {
  91
  92                 $total ++;
  93                 $profile_url = '';
  94                 $profile_photo = '';
  95                 $connect_url = '';
  96                 $name = '';
  97                 $network = '';
  98                 $updated = NULL_DATE;
  99                 $location = '';
 100                 $about = '';
 101                 $keywords = '';
 102                 $gender = '';
 103                 $contact_type = -1;
 104                 $generation = 0;
 105
 106                 $name = $entry->displayName;
 107
 108                 if (isset($entry->urls)) {
 109                         foreach ($entry->urls as $url) {
 110                                 if ($url->type == 'profile') {
 111                                         $profile_url = $url->value;
 112                                         continue;
 113                                 }
 114                                 if ($url->type == 'webfinger') {
 115                                         $connect_url = str_replace('acct:' , '', $url->value);
 116                                         continue;
 117                                 }
 118                         }
 119                 }
 120                 if (isset($entry->photos)) {
 121                         foreach ($entry->photos as $photo) {
 122                                 if ($photo->type == 'profile') {
 123                                         $profile_photo = $photo->value;
 124                                         continue;
 125                                 }
 126                         }
 127                 }
 128
 129                 if (isset($entry->updated)) {
 130                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
 131                 }
 132
 133                 if (isset($entry->network)) {
 134                         $network = $entry->network;
 135                 }
 136
 137                 if (isset($entry->currentLocation)) {
 138                         $location = $entry->currentLocation;
 139                 }
 140
 141                 if (isset($entry->aboutMe)) {
 142                         $about = html2bbcode($entry->aboutMe);
 143                 }
 144
 145                 if (isset($entry->gender)) {
 146                         $gender = $entry->gender;
 147                 }
 148
 149                 if (isset($entry->generation) AND ($entry->generation > 0)) {
 150                         $generation = ++$entry->generation;
 151                 }
 152
 153                 if (isset($entry->tags)) {
 154                         foreach($entry->tags as $tag) {
 155                                 $keywords = implode(", ", $tag);
 156                         }
 157                 }
 158
 159                 if (isset($entry->contactType) AND ($entry->contactType >= 0))
 160                         $contact_type = $entry->contactType;
 161
 162                 $gcontact = array("url" => $profile_url,
 163                                 "name" => $name,
 164                                 "network" => $network,
 165                                 "photo" => $profile_photo,
 166                                 "about" => $about,
 167                                 "location" => $location,
 168                                 "gender" => $gender,
 169                                 "keywords" => $keywords,
 170                                 "connect" => $connect_url,
 171                                 "updated" => $updated,
 172                                 "contact-type" => $contact_type,
 173                                 "generation" => $generation);
 174
 175                 try {
 176                         $gcontact = sanitize_gcontact($gcontact);
 177                         $gcid = update_gcontact($gcontact);
 178
 179                         link_gcontact($gcid, $uid, $cid, $zcid);
 180                 } catch (Exception $e) {
 181                         logger($e->getMessage(), LOGGER_DEBUG);
 182                 }
 183         }
 184         logger("poco_load: loaded $total entries",LOGGER_DEBUG);
 185
 186         q("DELETE FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `zcid` = %d AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY",
 187                 intval($cid),
 188                 intval($uid),
 189                 intval($zcid)
 190         );
 191
 192 }
 193 /**
 194  * @brief Sanitize the given gcontact data
 195  *
 196  * @param array $gcontact array with gcontact data
 197  *
 198  * Generation:
 199  *  0: No definition
 200  *  1: Profiles on this server
 201  *  2: Contacts of profiles on this server
 202  *  3: Contacts of contacts of profiles on this server
 203  *  4: ...
 204  *
 205  */
 206 function sanitize_gcontact(&$gcontact) {
 207
 208         if ($gcontact['url'] == "") {
 209                 throw new Exception('URL is empty');
 210         }
 211
 212         $urlparts = parse_url($gcontact['url']);
 213         if (!isset($urlparts["scheme"])) {
 214                 throw new Exception("This (".$gcontact['url'].") doesn't seem to be an url.");
 215         }
 216
 217         if (in_array($urlparts["host"], array("www.facebook.com", "facebook.com", "twitter.com",
 218                                                 "identi.ca", "alpha.app.net"))) {
 219                 throw new Exception('Contact from a non federated network ignored. ('.$gcontact['url'].')');
 220         }
 221
 222         // Don't store the statusnet connector as network
 223         // We can't simply set this to NETWORK_OSTATUS since the connector could have fetched posts from friendica as well
 224         if ($gcontact['network'] == NETWORK_STATUSNET) {
 225                 $gcontact['network'] = "";
 226         }
 227
 228         // Assure that there are no parameter fragments in the profile url
 229         if (in_array($gcontact['network'], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
 230                 $gcontact['url'] = clean_contact_url($gcontact['url']);
 231         }
 232
 233         $alternate = poco_alternate_ostatus_url($gcontact['url']);
 234
 235         // The global contacts should contain the original picture, not the cached one
 236         if (($gcontact['generation'] != 1) AND stristr(normalise_link($gcontact['photo']), normalise_link(App::get_baseurl()."/photo/"))) {
 237                 $gcontact['photo'] = "";
 238         }
 239
 240         if (!isset($gcontact['network'])) {
 241                 $r = q("SELECT `network` FROM `contact` WHERE `uid` = 0 AND `nurl` = '%s' AND `network` != '' AND `network` != '%s' LIMIT 1",
 242                         dbesc(normalise_link($gcontact['url'])), dbesc(NETWORK_STATUSNET)
 243                 );
 244                 if (dbm::is_result($r)) {
 245                         $gcontact['network'] = $r[0]["network"];
 246                 }
 247
 248                 if (($gcontact['network'] == "") OR ($gcontact['network'] == NETWORK_OSTATUS)) {
 249                         $r = q("SELECT `network`, `url` FROM `contact` WHERE `uid` = 0 AND `alias` IN ('%s', '%s') AND `network` != '' AND `network` != '%s' LIMIT 1",
 250                                 dbesc($gcontact['url']), dbesc(normalise_link($gcontact['url'])), dbesc(NETWORK_STATUSNET)
 251                         );
 252                         if (dbm::is_result($r)) {
 253                                 $gcontact['network'] = $r[0]["network"];
 254                         }
 255                 }
 256         }
 257
 258         $gcontact['server_url'] = '';
 259         $gcontact['network'] = '';
 260
 261         $x = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
 262                 dbesc(normalise_link($gcontact['url']))
 263         );
 264
 265         if (count($x)) {
 266                 if (!isset($gcontact['network']) AND ($x[0]["network"] != NETWORK_STATUSNET)) {
 267                         $gcontact['network'] = $x[0]["network"];
 268                 }
 269                 if ($gcontact['updated'] <= NULL_DATE) {
 270                         $gcontact['updated'] = $x[0]["updated"];
 271                 }
 272                 if (!isset($gcontact['server_url']) AND (normalise_link($x[0]["server_url"]) != normalise_link($x[0]["url"]))) {
 273                         $gcontact['server_url'] = $x[0]["server_url"];
 274                 }
 275                 if (!isset($gcontact['addr'])) {
 276                         $gcontact['addr'] = $x[0]["addr"];
 277                 }
 278         }
 279
 280         if ((!isset($gcontact['network']) OR !isset($gcontact['name']) OR !isset($gcontact['addr']) OR !isset($gcontact['photo']) OR !isset($gcontact['server_url']) OR $alternate)
 281                 AND poco_reachable($gcontact['url'], $gcontact['server_url'], $gcontact['network'], false)) {
 282                 $data = Probe::uri($gcontact['url']);
 283
 284                 if ($data["network"] == NETWORK_PHANTOM) {
 285                         throw new Exception('Probing for URL '.$gcontact['url'].' failed');
 286                 }
 287
 288                 $orig_profile = $gcontact['url'];
 289
 290                 $gcontact["server_url"] = $data["baseurl"];
 291
 292                 $gcontact = array_merge($gcontact, $data);
 293
 294                 if ($alternate AND ($gcontact['network'] == NETWORK_OSTATUS)) {
 295                         // Delete the old entry - if it exists
 296                         $r = q("SELECT `id` FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 297                         if ($r) {
 298                                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 299                                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($r[0]["id"]));
 300                         }
 301                 }
 302         }
 303
 304         if (!isset($gcontact['name']) OR !isset($gcontact['photo'])) {
 305                 throw new Exception('No name and photo for URL '.$gcontact['url']);
 306         }
 307
 308         if (!in_array($gcontact['network'], array(NETWORK_DFRN, NETWORK_OSTATUS, NETWORK_DIASPORA))) {
 309                 throw new Exception('No federated network ('.$gcontact['network'].') detected for URL '.$gcontact['url']);
 310         }
 311
 312         if (!isset($gcontact['server_url'])) {
 313                 // We check the server url to be sure that it is a real one
 314                 $server_url = poco_detect_server($gcontact['url']);
 315
 316                 // We are now sure that it is a correct URL. So we use it in the future
 317                 if ($server_url != "") {
 318                         $gcontact['server_url'] = $server_url;
 319                 }
 320         }
 321
 322         // The server URL doesn't seem to be valid, so we don't store it.
 323         if (!poco_check_server($gcontact['server_url'], $gcontact['network'])) {
 324                 $gcontact['server_url'] = "";
 325         }
 326
 327         return $gcontact;
 328 }
 329
 330 /**
 331  * @brief Link the gcontact entry with user, contact and global contact
 332  *
 333  * @param integer $gcid Global contact ID
 334  * @param integer $cid Contact ID
 335  * @param integer $uid User ID
 336  * @param integer $zcid Global Contact ID
 337  * *
 338  */
 339 function link_gcontact($gcid, $uid = 0, $cid = 0, $zcid = 0) {
 340
 341         if ($gcid <= 0) {
 342                 return;
 343         }
 344
 345         $r = q("SELECT * FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d LIMIT 1",
 346                 intval($cid),
 347                 intval($uid),
 348                 intval($gcid),
 349                 intval($zcid)
 350         );
 351         if (!dbm::is_result($r)) {
 352                 q("INSERT INTO `glink` (`cid`, `uid`, `gcid`, `zcid`, `updated`) VALUES (%d, %d, %d, %d, '%s') ",
 353                         intval($cid),
 354                         intval($uid),
 355                         intval($gcid),
 356                         intval($zcid),
 357                         dbesc(datetime_convert())
 358                 );
 359         } else {
 360                 q("UPDATE `glink` SET `updated` = '%s' WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d",
 361                         dbesc(datetime_convert()),
 362                         intval($cid),
 363                         intval($uid),
 364                         intval($gcid),
 365                         intval($zcid)
 366                 );
 367         }
 368 }
 369
 370 function poco_reachable($profile, $server = "", $network = "", $force = false) {
 371
 372         if ($server == "")
 373                 $server = poco_detect_server($profile);
 374
 375         if ($server == "")
 376                 return true;
 377
 378         return poco_check_server($server, $network, $force);
 379 }
 380
 381 function poco_detect_server($profile) {
 382
 383         // Try to detect the server path based upon some known standard paths
 384         $server_url = "";
 385
 386         if ($server_url == "") {
 387                 $friendica = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $profile);
 388                 if ($friendica != $profile) {
 389                         $server_url = $friendica;
 390                         $network = NETWORK_DFRN;
 391                 }
 392         }
 393
 394         if ($server_url == "") {
 395                 $diaspora = preg_replace("=(https?://)(.*)/u/(.*)=ism", "$1$2", $profile);
 396                 if ($diaspora != $profile) {
 397                         $server_url = $diaspora;
 398                         $network = NETWORK_DIASPORA;
 399                 }
 400         }
 401
 402         if ($server_url == "") {
 403                 $red = preg_replace("=(https?://)(.*)/channel/(.*)=ism", "$1$2", $profile);
 404                 if ($red != $profile) {
 405                         $server_url = $red;
 406                         $network = NETWORK_DIASPORA;
 407                 }
 408         }
 409
 410         // Mastodon
 411         if ($server_url == "") {
 412                 $mastodon = preg_replace("=(https?://)(.*)/users/(.*)=ism", "$1$2", $profile);
 413                 if ($mastodon != $profile) {
 414                         $server_url = $mastodon;
 415                         $network = NETWORK_OSTATUS;
 416                 }
 417         }
 418
 419         // Numeric OStatus variant
 420         if ($server_url == "") {
 421                 $ostatus = preg_replace("=(https?://)(.*)/user/(.*)=ism", "$1$2", $profile);
 422                 if ($ostatus != $profile) {
 423                         $server_url = $ostatus;
 424                         $network = NETWORK_OSTATUS;
 425                 }
 426         }
 427
 428         // Wild guess
 429         if ($server_url == "") {
 430                 $base = preg_replace("=(https?://)(.*?)/(.*)=ism", "$1$2", $profile);
 431                 if ($base != $profile) {
 432                         $server_url = $base;
 433                         $network = NETWORK_PHANTOM;
 434                 }
 435         }
 436
 437         if ($server_url == "") {
 438                 return "";
 439         }
 440
 441         $r = q("SELECT `id` FROM `gserver` WHERE `nurl` = '%s' AND `last_contact` > `last_failure`",
 442                 dbesc(normalise_link($server_url)));
 443         if (dbm::is_result($r)) {
 444                 return $server_url;
 445         }
 446
 447         // Fetch the host-meta to check if this really is a server
 448         $serverret = z_fetch_url($server_url."/.well-known/host-meta");
 449         if (!$serverret["success"]) {
 450                 return "";
 451         }
 452
 453         return $server_url;
 454 }
 455
 456 function poco_alternate_ostatus_url($url) {
 457         return(preg_match("=https?://.+/user/\d+=ism", $url, $matches));
 458 }
 459
 460 function poco_last_updated($profile, $force = false) {
 461
 462         $gcontacts = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s'",
 463                         dbesc(normalise_link($profile)));
 464
 465         if (!dbm::is_result($gcontacts)) {
 466                 return false;
 467         }
 468
 469         $contact = array("url" => $profile);
 470
 471         if ($gcontacts[0]["created"] <= NULL_DATE) {
 472                 $contact['created'] = datetime_convert();
 473         }
 474
 475         if ($force) {
 476                 $server_url = normalise_link(poco_detect_server($profile));
 477         }
 478
 479         if (($server_url == '') AND ($gcontacts[0]["server_url"] != "")) {
 480                 $server_url = $gcontacts[0]["server_url"];
 481         }
 482
 483         if (!$force AND (($server_url == '') OR ($gcontacts[0]["server_url"] == $gcontacts[0]["nurl"]))) {
 484                 $server_url = normalise_link(poco_detect_server($profile));
 485         }
 486
 487         if (!in_array($gcontacts[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_FEED, NETWORK_OSTATUS, ""))) {
 488                 logger("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", LOGGER_DEBUG);
 489                 return false;
 490         }
 491
 492         if ($server_url != "") {
 493                 if (!poco_check_server($server_url, $gcontacts[0]["network"], $force)) {
 494                         if ($force) {
 495                                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 496                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 497                         }
 498
 499                         logger("Profile ".$profile.": Server ".$server_url." wasn't reachable.", LOGGER_DEBUG);
 500                         return false;
 501                 }
 502                 $contact['server_url'] = $server_url;
 503         }
 504
 505         if (in_array($gcontacts[0]["network"], array("", NETWORK_FEED))) {
 506                 $server = q("SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 507                         dbesc(normalise_link($server_url)));
 508
 509                 if ($server) {
 510                         $contact['network'] = $server[0]["network"];
 511                 } else {
 512                         return false;
 513                 }
 514         }
 515
 516         // noscrape is really fast so we don't cache the call.
 517         if (($server_url != "") AND ($gcontacts[0]["nick"] != "")) {
 518
 519                 //  Use noscrape if possible
 520                 $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($server_url)));
 521
 522                 if ($server) {
 523                         $noscraperet = z_fetch_url($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 524
 525                         if ($noscraperet["success"] AND ($noscraperet["body"] != "")) {
 526
 527                                 $noscrape = json_decode($noscraperet["body"], true);
 528
 529                                 if (is_array($noscrape)) {
 530                                         $contact["network"] = $server[0]["network"];
 531
 532                                         if (isset($noscrape["fn"])) {
 533                                                 $contact["name"] = $noscrape["fn"];
 534                                         }
 535                                         if (isset($noscrape["comm"])) {
 536                                                 $contact["community"] = $noscrape["comm"];
 537                                         }
 538                                         if (isset($noscrape["tags"])) {
 539                                                 $keywords = implode(" ", $noscrape["tags"]);
 540                                                 if ($keywords != "") {
 541                                                         $contact["keywords"] = $keywords;
 542                                                 }
 543                                         }
 544
 545                                         $location = formatted_location($noscrape);
 546                                         if ($location) {
 547                                                 $contact["location"] = $location;
 548                                         }
 549                                         if (isset($noscrape["dfrn-notify"])) {
 550                                                 $contact["notify"] = $noscrape["dfrn-notify"];
 551                                         }
 552                                         // Remove all fields that are not present in the gcontact table
 553                                         unset($noscrape["fn"]);
 554                                         unset($noscrape["key"]);
 555                                         unset($noscrape["homepage"]);
 556                                         unset($noscrape["comm"]);
 557                                         unset($noscrape["tags"]);
 558                                         unset($noscrape["locality"]);
 559                                         unset($noscrape["region"]);
 560                                         unset($noscrape["country-name"]);
 561                                         unset($noscrape["contacts"]);
 562                                         unset($noscrape["dfrn-request"]);
 563                                         unset($noscrape["dfrn-confirm"]);
 564                                         unset($noscrape["dfrn-notify"]);
 565                                         unset($noscrape["dfrn-poll"]);
 566
 567                                         // Set the date of the last contact
 568                                         /// @todo By now the function "update_gcontact" doesn't work with this field
 569                                         //$contact["last_contact"] = datetime_convert();
 570
 571                                         $contact = array_merge($contact, $noscrape);
 572
 573                                         update_gcontact($contact);
 574
 575                                         if (trim($noscrape["updated"]) != "") {
 576                                                 q("UPDATE `gcontact` SET `last_contact` = '%s' WHERE `nurl` = '%s'",
 577                                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 578
 579                                                 logger("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", LOGGER_DEBUG);
 580
 581                                                 return $noscrape["updated"];
 582                                         }
 583                                 }
 584                         }
 585                 }
 586         }
 587
 588         // If we only can poll the feed, then we only do this once a while
 589         if (!$force AND !poco_do_update($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"], $gcontacts[0]["last_contact"])) {
 590                 logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 591
 592                 update_gcontact($contact);
 593                 return $gcontacts[0]["updated"];
 594         }
 595
 596         $data = Probe::uri($profile);
 597
 598         // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 599         // Then check the other link and delete this one
 600         if (($data["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($profile) AND
 601                 (normalise_link($profile) == normalise_link($data["alias"])) AND
 602                 (normalise_link($profile) != normalise_link($data["url"]))) {
 603
 604                 // Delete the old entry
 605                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($profile)));
 606                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($gcontacts[0]["id"]));
 607
 608                 $gcontact = array_merge($gcontacts[0], $data);
 609
 610                 $gcontact["server_url"] = $data["baseurl"];
 611
 612                 try {
 613                         $gcontact = sanitize_gcontact($gcontact);
 614                         update_gcontact($gcontact);
 615
 616                         poco_last_updated($data["url"], $force);
 617                 } catch (Exception $e) {
 618                         logger($e->getMessage(), LOGGER_DEBUG);
 619                 }
 620
 621                 logger("Profile ".$profile." was deleted", LOGGER_DEBUG);
 622                 return false;
 623         }
 624
 625         if (($data["poll"] == "") OR (in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
 626                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 627                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 628
 629                 logger("Profile ".$profile." wasn't reachable (profile)", LOGGER_DEBUG);
 630                 return false;
 631         }
 632
 633         $contact = array_merge($contact, $data);
 634
 635         $contact["server_url"] = $data["baseurl"];
 636
 637         update_gcontact($contact);
 638
 639         $feedret = z_fetch_url($data["poll"]);
 640
 641         if (!$feedret["success"]) {
 642                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 643                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 644
 645                 logger("Profile ".$profile." wasn't reachable (no feed)", LOGGER_DEBUG);
 646                 return false;
 647         }
 648
 649         $doc = new DOMDocument();
 650         @$doc->loadXML($feedret["body"]);
 651
 652         $xpath = new DomXPath($doc);
 653         $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 654
 655         $entries = $xpath->query('/atom:feed/atom:entry');
 656
 657         $last_updated = "";
 658
 659         foreach ($entries AS $entry) {
 660                 $published = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 661                 $updated = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 662
 663                 if ($last_updated < $published)
 664                         $last_updated = $published;
 665
 666                 if ($last_updated < $updated)
 667                         $last_updated = $updated;
 668         }
 669
 670         // Maybe there aren't any entries. Then check if it is a valid feed
 671         if ($last_updated == "") {
 672                 if ($xpath->query('/atom:feed')->length > 0) {
 673                         $last_updated = NULL_DATE;
 674                 }
 675         }
 676         q("UPDATE `gcontact` SET `updated` = '%s', `last_contact` = '%s' WHERE `nurl` = '%s'",
 677                 dbesc(dbm::date($last_updated)), dbesc(dbm::date()), dbesc(normalise_link($profile)));
 678
 679         if (($gcontacts[0]["generation"] == 0)) {
 680                 q("UPDATE `gcontact` SET `generation` = 9 WHERE `nurl` = '%s'",
 681                         dbesc(normalise_link($profile)));
 682         }
 683
 684         logger("Profile ".$profile." was last updated at ".$last_updated, LOGGER_DEBUG);
 685
 686         return($last_updated);
 687 }
 688
 689 function poco_do_update($created, $updated, $last_failure,  $last_contact) {
 690         $now = strtotime(datetime_convert());
 691
 692         if ($updated > $last_contact)
 693                 $contact_time = strtotime($updated);
 694         else
 695                 $contact_time = strtotime($last_contact);
 696
 697         $failure_time = strtotime($last_failure);
 698         $created_time = strtotime($created);
 699
 700         // If there is no "created" time then use the current time
 701         if ($created_time <= 0)
 702                 $created_time = $now;
 703
 704         // If the last contact was less than 24 hours then don't update
 705         if (($now - $contact_time) < (60 * 60 * 24))
 706                 return false;
 707
 708         // If the last failure was less than 24 hours then don't update
 709         if (($now - $failure_time) < (60 * 60 * 24))
 710                 return false;
 711
 712         // If the last contact was less than a week ago and the last failure is older than a week then don't update
 713         //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) AND ($contact_time > $failure_time))
 714         //      return false;
 715
 716         // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 717         if ((($now - $contact_time) > (60 * 60 * 24 * 7)) AND (($now - $created_time) > (60 * 60 * 24 * 7)) AND (($now - $failure_time) < (60 * 60 * 24 * 7)))
 718                 return false;
 719
 720         // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 721         if ((($now - $contact_time) > (60 * 60 * 24 * 30)) AND (($now - $created_time) > (60 * 60 * 24 * 30)) AND (($now - $failure_time) < (60 * 60 * 24 * 30)))
 722                 return false;
 723
 724         return true;
 725 }
 726
 727 function poco_to_boolean($val) {
 728         if (($val == "true") OR ($val == 1))
 729                 return(true);
 730         if (($val == "false") OR ($val == 0))
 731                 return(false);
 732
 733         return ($val);
 734 }
 735
 736 /**
 737  * @brief Detect server type (Hubzilla or Friendica) via the poco data
 738  *
 739  * @param object $data POCO data
 740  * @return array Server data
 741  */
 742 function poco_detect_poco_data($data) {
 743         $server = false;
 744
 745         if (!isset($data->entry)) {
 746                 return false;
 747         }
 748
 749         if (count($data->entry) == 0) {
 750                 return false;
 751         }
 752
 753         if (!isset($data->entry[0]->urls)) {
 754                 return false;
 755         }
 756
 757         if (count($data->entry[0]->urls) == 0) {
 758                 return false;
 759         }
 760
 761         foreach ($data->entry[0]->urls AS $url) {
 762                 if ($url->type == 'zot') {
 763                         $server = array();
 764                         $server["platform"] = 'Hubzilla';
 765                         $server["network"] = NETWORK_DIASPORA;
 766                         return $server;
 767                 }
 768         }
 769         return false;
 770 }
 771
 772 /**
 773  * @brief Detect server type by using the nodeinfo data
 774  *
 775  * @param string $server_url address of the server
 776  * @return array Server data
 777  */
 778 function poco_fetch_nodeinfo($server_url) {
 779         $serverret = z_fetch_url($server_url."/.well-known/nodeinfo");
 780         if (!$serverret["success"]) {
 781                 return false;
 782         }
 783
 784         $nodeinfo = json_decode($serverret['body']);
 785
 786         if (!is_object($nodeinfo)) {
 787                 return false;
 788         }
 789
 790         if (!is_array($nodeinfo->links)) {
 791                 return false;
 792         }
 793
 794         $nodeinfo_url = '';
 795
 796         foreach ($nodeinfo->links AS $link) {
 797                 if ($link->rel == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
 798                         $nodeinfo_url = $link->href;
 799                 }
 800         }
 801
 802         if ($nodeinfo_url == '') {
 803                 return false;
 804         }
 805
 806         $serverret = z_fetch_url($nodeinfo_url);
 807         if (!$serverret["success"]) {
 808                 return false;
 809         }
 810
 811         $nodeinfo = json_decode($serverret['body']);
 812
 813         if (!is_object($nodeinfo)) {
 814                 return false;
 815         }
 816
 817         $server = array();
 818
 819         $server['register_policy'] = REGISTER_CLOSED;
 820
 821         if (is_bool($nodeinfo->openRegistrations) AND $nodeinfo->openRegistrations) {
 822                 $server['register_policy'] = REGISTER_OPEN;
 823         }
 824
 825         if (is_object($nodeinfo->software)) {
 826                 if (isset($nodeinfo->software->name)) {
 827                         $server['platform'] = $nodeinfo->software->name;
 828                 }
 829
 830                 if (isset($nodeinfo->software->version)) {
 831                         $server['version'] = $nodeinfo->software->version;
 832                         // Version numbers on Nodeinfo are presented with additional info, e.g.:
 833                         // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 834                         $server['version'] = preg_replace("=(.+)-(.{4,})=ism", "$1", $server['version']);
 835                 }
 836         }
 837
 838         if (is_object($nodeinfo->metadata)) {
 839                 if (isset($nodeinfo->metadata->nodeName)) {
 840                         $server['site_name'] = $nodeinfo->metadata->nodeName;
 841                 }
 842         }
 843
 844         $diaspora = false;
 845         $friendica = false;
 846         $gnusocial = false;
 847
 848         if (is_array($nodeinfo->protocols->inbound)) {
 849                 foreach ($nodeinfo->protocols->inbound AS $inbound) {
 850                         if ($inbound == 'diaspora') {
 851                                 $diaspora = true;
 852                         }
 853                         if ($inbound == 'friendica') {
 854                                 $friendica = true;
 855                         }
 856                         if ($inbound == 'gnusocial') {
 857                                 $gnusocial = true;
 858                         }
 859                 }
 860         }
 861
 862         if ($gnusocial) {
 863                 $server['network'] = NETWORK_OSTATUS;
 864         }
 865         if ($diaspora) {
 866                 $server['network'] = NETWORK_DIASPORA;
 867         }
 868         if ($friendica) {
 869                 $server['network'] = NETWORK_DFRN;
 870         }
 871
 872         if (!$server) {
 873                 return false;
 874         }
 875
 876         return $server;
 877 }
 878
 879 /**
 880  * @brief Detect server type (Hubzilla or Friendica) via the front page body
 881  *
 882  * @param string $body Front page of the server
 883  * @return array Server data
 884  */
 885 function poco_detect_server_type($body) {
 886         $server = false;
 887
 888         $doc = new \DOMDocument();
 889         @$doc->loadHTML($body);
 890         $xpath = new \DomXPath($doc);
 891
 892         $list = $xpath->query("//meta[@name]");
 893
 894         foreach ($list as $node) {
 895                 $attr = array();
 896                 if ($node->attributes->length) {
 897                         foreach ($node->attributes as $attribute) {
 898                                 $attr[$attribute->name] = $attribute->value;
 899                         }
 900                 }
 901                 if ($attr['name'] == 'generator') {
 902                         $version_part = explode(" ", $attr['content']);
 903                         if (count($version_part) == 2) {
 904                                 if (in_array($version_part[0], array("Friendika", "Friendica"))) {
 905                                         $server = array();
 906                                         $server["platform"] = $version_part[0];
 907                                         $server["version"] = $version_part[1];
 908                                         $server["network"] = NETWORK_DFRN;
 909                                 }
 910                         }
 911                 }
 912         }
 913
 914         if (!$server) {
 915                 $list = $xpath->query("//meta[@property]");
 916
 917                 foreach ($list as $node) {
 918                         $attr = array();
 919                         if ($node->attributes->length) {
 920                                 foreach ($node->attributes as $attribute) {
 921                                         $attr[$attribute->name] = $attribute->value;
 922                                 }
 923                         }
 924                         if ($attr['property'] == 'generator') {
 925                                 if (in_array($attr['content'], array("hubzilla", "BlaBlaNet"))) {
 926                                         $server = array();
 927                                         $server["platform"] = $attr['content'];
 928                                         $server["version"] = "";
 929                                         $server["network"] = NETWORK_DIASPORA;
 930                                 }
 931                         }
 932                 }
 933         }
 934
 935         if (!$server) {
 936                 return false;
 937         }
 938
 939         $server["site_name"] = $xpath->evaluate($element."//head/title/text()", $context)->item(0)->nodeValue;
 940         return $server;
 941 }
 942
 943 function poco_check_server($server_url, $network = "", $force = false) {
 944
 945         // Unify the server address
 946         $server_url = trim($server_url, "/");
 947         $server_url = str_replace("/index.php", "", $server_url);
 948
 949         if ($server_url == "")
 950                 return false;
 951
 952         $servers = q("SELECT * FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
 953         if (dbm::is_result($servers)) {
 954
 955                 if ($servers[0]["created"] <= NULL_DATE) {
 956                         q("UPDATE `gserver` SET `created` = '%s' WHERE `nurl` = '%s'",
 957                                 dbesc(datetime_convert()), dbesc(normalise_link($server_url)));
 958                 }
 959                 $poco = $servers[0]["poco"];
 960                 $noscrape = $servers[0]["noscrape"];
 961
 962                 if ($network == "")
 963                         $network = $servers[0]["network"];
 964
 965                 $last_contact = $servers[0]["last_contact"];
 966                 $last_failure = $servers[0]["last_failure"];
 967                 $version = $servers[0]["version"];
 968                 $platform = $servers[0]["platform"];
 969                 $site_name = $servers[0]["site_name"];
 970                 $info = $servers[0]["info"];
 971                 $register_policy = $servers[0]["register_policy"];
 972
 973                 if (!$force AND !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
 974                         logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 975                         return ($last_contact >= $last_failure);
 976                 }
 977         } else {
 978                 $poco = "";
 979                 $noscrape = "";
 980                 $version = "";
 981                 $platform = "";
 982                 $site_name = "";
 983                 $info = "";
 984                 $register_policy = -1;
 985
 986                 $last_contact = NULL_DATE;
 987                 $last_failure = NULL_DATE;
 988         }
 989         logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$servers[0]["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 990
 991         $failure = false;
 992         $possible_failure = false;
 993         $orig_last_failure = $last_failure;
 994         $orig_last_contact = $last_contact;
 995
 996         // Check if the page is accessible via SSL.
 997         $orig_server_url = $server_url;
 998         $server_url = str_replace("http://", "https://", $server_url);
 999
1000         // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1001         $serverret = z_fetch_url($server_url."/.well-known/host-meta", false, $redirects, array('timeout' => 20));
1002
1003         // Quit if there is a timeout.
1004         // But we want to make sure to only quit if we are mostly sure that this server url fits.
1005         if (dbm::is_result($servers) AND ($orig_server_url == $server_url) AND
1006                 ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
1007                 logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1008                 return false;
1009         }
1010
1011         // Maybe the page is unencrypted only?
1012         $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1013         if (!$serverret["success"] OR ($serverret["body"] == "") OR (@sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
1014                 $server_url = str_replace("https://", "http://", $server_url);
1015
1016                 // We set the timeout to 20 seconds since this operation should be done in no time if the server was vital
1017                 $serverret = z_fetch_url($server_url."/.well-known/host-meta", false, $redirects, array('timeout' => 20));
1018
1019                 // Quit if there is a timeout
1020                 if ($serverret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1021                         logger("Connection to server ".$server_url." timed out.", LOGGER_DEBUG);
1022                         return false;
1023                 }
1024
1025                 $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
1026         }
1027
1028         if (!$serverret["success"] OR ($serverret["body"] == "") OR (sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
1029                 // Workaround for bad configured servers (known nginx problem)
1030                 if (!in_array($serverret["debug"]["http_code"], array("403", "404"))) {
1031                         $last_failure = datetime_convert();
1032                         $failure = true;
1033                 }
1034                 $possible_failure = true;
1035         } elseif ($network == NETWORK_DIASPORA)
1036                 $last_contact = datetime_convert();
1037
1038         // If the server has no possible failure we reset the cached data
1039         if (!$possible_failure) {
1040                 $version = "";
1041                 $platform = "";
1042                 $site_name = "";
1043                 $info = "";
1044                 $register_policy = -1;
1045         }
1046
1047         // Look for poco
1048         if (!$failure) {
1049                 $serverret = z_fetch_url($server_url."/poco");
1050                 if ($serverret["success"]) {
1051                         $data = json_decode($serverret["body"]);
1052                         if (isset($data->totalResults)) {
1053                                 $poco = $server_url."/poco";
1054                                 $last_contact = datetime_convert();
1055
1056                                 $server = poco_detect_poco_data($data);
1057                                 if ($server) {
1058                                         $platform = $server['platform'];
1059                                         $network = $server['network'];
1060                                         $version = '';
1061                                         $site_name = '';
1062                                 }
1063                         }
1064                 }
1065         }
1066
1067         if (!$failure) {
1068                 // Test for Diaspora, Hubzilla, Mastodon or older Friendica servers
1069                 $serverret = z_fetch_url($server_url);
1070
1071                 if (!$serverret["success"] OR ($serverret["body"] == "")) {
1072                         $last_failure = datetime_convert();
1073                         $failure = true;
1074                 } else {
1075                         $server = poco_detect_server_type($serverret["body"]);
1076                         if ($server) {
1077                                 $platform = $server['platform'];
1078                                 $network = $server['network'];
1079                                 $version = $server['version'];
1080                                 $site_name = $server['site_name'];
1081                                 $last_contact = datetime_convert();
1082                         }
1083
1084                         $lines = explode("\n",$serverret["header"]);
1085                         if(count($lines)) {
1086                                 foreach($lines as $line) {
1087                                         $line = trim($line);
1088                                         if(stristr($line,'X-Diaspora-Version:')) {
1089                                                 $platform = "Diaspora";
1090                                                 $version = trim(str_replace("X-Diaspora-Version:", "", $line));
1091                                                 $version = trim(str_replace("x-diaspora-version:", "", $version));
1092                                                 $network = NETWORK_DIASPORA;
1093                                                 $versionparts = explode("-", $version);
1094                                                 $version = $versionparts[0];
1095                                                 $last_contact = datetime_convert();
1096                                         }
1097
1098                                         if(stristr($line,'Server: Mastodon')) {
1099                                                 $platform = "Mastodon";
1100                                                 $network = NETWORK_OSTATUS;
1101                                                 // Mastodon doesn't reveal version numbers
1102                                                 $version = "";
1103                                                 $last_contact = datetime_convert();
1104                                         }
1105                                 }
1106                         }
1107                 }
1108         }
1109
1110         if (!$failure AND ($poco == "")) {
1111                 // Test for Statusnet
1112                 // Will also return data for Friendica and GNU Social - but it will be overwritten later
1113                 // The "not implemented" is a special treatment for really, really old Friendica versions
1114                 $serverret = z_fetch_url($server_url."/api/statusnet/version.json");
1115                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
1116                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
1117                         $platform = "StatusNet";
1118                         // Remove junk that some GNU Social servers return
1119                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1120                         $version = trim($version, '"');
1121                         $network = NETWORK_OSTATUS;
1122                         $last_contact = datetime_convert();
1123                 }
1124
1125                 // Test for GNU Social
1126                 $serverret = z_fetch_url($server_url."/api/gnusocial/version.json");
1127                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
1128                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
1129                         $platform = "GNU Social";
1130                         // Remove junk that some GNU Social servers return
1131                         $version = str_replace(chr(239).chr(187).chr(191), "", $serverret["body"]);
1132                         $version = trim($version, '"');
1133                         $network = NETWORK_OSTATUS;
1134                         $last_contact = datetime_convert();
1135                 }
1136         }
1137
1138         if (!$failure) {
1139                 // Test for Hubzilla, Redmatrix or Friendica
1140                 $serverret = z_fetch_url($server_url."/api/statusnet/config.json");
1141                 if ($serverret["success"]) {
1142                         $data = json_decode($serverret["body"]);
1143                         if (isset($data->site->server)) {
1144                                 $last_contact = datetime_convert();
1145
1146                                 if (isset($data->site->platform)) {
1147                                         $platform = $data->site->platform->PLATFORM_NAME;
1148                                         $version = $data->site->platform->STD_VERSION;
1149                                         $network = NETWORK_DIASPORA;
1150                                 }
1151                                 if (isset($data->site->BlaBlaNet)) {
1152                                         $platform = $data->site->BlaBlaNet->PLATFORM_NAME;
1153                                         $version = $data->site->BlaBlaNet->STD_VERSION;
1154                                         $network = NETWORK_DIASPORA;
1155                                 }
1156                                 if (isset($data->site->hubzilla)) {
1157                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
1158                                         $version = $data->site->hubzilla->RED_VERSION;
1159                                         $network = NETWORK_DIASPORA;
1160                                 }
1161                                 if (isset($data->site->redmatrix)) {
1162                                         if (isset($data->site->redmatrix->PLATFORM_NAME))
1163                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
1164                                         elseif (isset($data->site->redmatrix->RED_PLATFORM))
1165                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
1166
1167                                         $version = $data->site->redmatrix->RED_VERSION;
1168                                         $network = NETWORK_DIASPORA;
1169                                 }
1170                                 if (isset($data->site->friendica)) {
1171                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
1172                                         $version = $data->site->friendica->FRIENDICA_VERSION;
1173                                         $network = NETWORK_DFRN;
1174                                 }
1175
1176                                 $site_name = $data->site->name;
1177
1178                                 $data->site->closed = poco_to_boolean($data->site->closed);
1179                                 $data->site->private = poco_to_boolean($data->site->private);
1180                                 $data->site->inviteonly = poco_to_boolean($data->site->inviteonly);
1181
1182                                 if (!$data->site->closed AND !$data->site->private and $data->site->inviteonly)
1183                                         $register_policy = REGISTER_APPROVE;
1184                                 elseif (!$data->site->closed AND !$data->site->private)
1185                                         $register_policy = REGISTER_OPEN;
1186                                 else
1187                                         $register_policy = REGISTER_CLOSED;
1188                         }
1189                 }
1190         }
1191
1192
1193         // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
1194         if (!$failure) {
1195                 $serverret = z_fetch_url($server_url."/statistics.json");
1196                 if ($serverret["success"]) {
1197                         $data = json_decode($serverret["body"]);
1198                         if (isset($data->version)) {
1199                                 $version = $data->version;
1200                                 // Version numbers on statistics.json are presented with additional info, e.g.:
1201                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
1202                                 $version = preg_replace("=(.+)-(.{4,})=ism", "$1", $version);
1203                         }
1204
1205                         $site_name = $data->name;
1206
1207                         if (isset($data->network)) {
1208                                 $platform = $data->network;
1209                         }
1210
1211                         if ($platform == "Diaspora") {
1212                                 $network = NETWORK_DIASPORA;
1213                         }
1214
1215                         if ($data->registrations_open) {
1216                                 $register_policy = REGISTER_OPEN;
1217                         } else {
1218                                 $register_policy = REGISTER_CLOSED;
1219                         }
1220
1221                         if (isset($data->version))
1222                                 $last_contact = datetime_convert();
1223                 }
1224         }
1225
1226         // Query nodeinfo. Working for (at least) Diaspora and Friendica.
1227         if (!$failure) {
1228                 $server = poco_fetch_nodeinfo($server_url);
1229                 if ($server) {
1230                         $register_policy = $server['register_policy'];
1231
1232                         if (isset($server['platform'])) {
1233                                 $platform = $server['platform'];
1234                         }
1235
1236                         if (isset($server['network'])) {
1237                                 $network = $server['network'];
1238                         }
1239
1240                         if (isset($server['version'])) {
1241                                 $version = $server['version'];
1242                         }
1243
1244                         if (isset($server['site_name'])) {
1245                                 $site_name = $server['site_name'];
1246                         }
1247
1248                         $last_contact = datetime_convert();
1249                 }
1250         }
1251
1252         // Check for noscrape
1253         // Friendica servers could be detected as OStatus servers
1254         if (!$failure AND in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
1255                 $serverret = z_fetch_url($server_url."/friendica/json");
1256
1257                 if (!$serverret["success"])
1258                         $serverret = z_fetch_url($server_url."/friendika/json");
1259
1260                 if ($serverret["success"]) {
1261                         $data = json_decode($serverret["body"]);
1262
1263                         if (isset($data->version)) {
1264                                 $last_contact = datetime_convert();
1265                                 $network = NETWORK_DFRN;
1266
1267                                 $noscrape = $data->no_scrape_url;
1268                                 $version = $data->version;
1269                                 $site_name = $data->site_name;
1270                                 $info = $data->info;
1271                                 $register_policy_str = $data->register_policy;
1272                                 $platform = $data->platform;
1273
1274                                 switch ($register_policy_str) {
1275                                         case "REGISTER_CLOSED":
1276                                                 $register_policy = REGISTER_CLOSED;
1277                                                 break;
1278                                         case "REGISTER_APPROVE":
1279                                                 $register_policy = REGISTER_APPROVE;
1280                                                 break;
1281                                         case "REGISTER_OPEN":
1282                                                 $register_policy = REGISTER_OPEN;
1283                                                 break;
1284                                 }
1285                         }
1286                 }
1287         }
1288
1289         if ($possible_failure AND !$failure) {
1290                 $last_failure = datetime_convert();
1291                 $failure = true;
1292         }
1293
1294         if ($failure) {
1295                 $last_contact = $orig_last_contact;
1296         } else {
1297                 $last_failure = $orig_last_failure;
1298         }
1299
1300         if (($last_contact <= $last_failure) AND !$failure) {
1301                 logger("Server ".$server_url." seems to be alive, but last contact wasn't set - could be a bug", LOGGER_DEBUG);
1302         } else if (($last_contact >= $last_failure) AND $failure) {
1303                 logger("Server ".$server_url." seems to be dead, but last failure wasn't set - could be a bug", LOGGER_DEBUG);
1304         }
1305
1306         // Check again if the server exists
1307         $servers = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1308
1309         $version = strip_tags($version);
1310         $site_name = strip_tags($site_name);
1311         $info = strip_tags($info);
1312         $platform = strip_tags($platform);
1313
1314         if ($servers) {
1315                  q("UPDATE `gserver` SET `url` = '%s', `version` = '%s', `site_name` = '%s', `info` = '%s', `register_policy` = %d, `poco` = '%s', `noscrape` = '%s',
1316                         `network` = '%s', `platform` = '%s', `last_contact` = '%s', `last_failure` = '%s' WHERE `nurl` = '%s'",
1317                         dbesc($server_url),
1318                         dbesc($version),
1319                         dbesc($site_name),
1320                         dbesc($info),
1321                         intval($register_policy),
1322                         dbesc($poco),
1323                         dbesc($noscrape),
1324                         dbesc($network),
1325                         dbesc($platform),
1326                         dbesc($last_contact),
1327                         dbesc($last_failure),
1328                         dbesc(normalise_link($server_url))
1329                 );
1330         } elseif (!$failure) {
1331                 q("INSERT INTO `gserver` (`url`, `nurl`, `version`, `site_name`, `info`, `register_policy`, `poco`, `noscrape`, `network`, `platform`, `created`, `last_contact`, `last_failure`)
1332                                         VALUES ('%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s')",
1333                                 dbesc($server_url),
1334                                 dbesc(normalise_link($server_url)),
1335                                 dbesc($version),
1336                                 dbesc($site_name),
1337                                 dbesc($info),
1338                                 intval($register_policy),
1339                                 dbesc($poco),
1340                                 dbesc($noscrape),
1341                                 dbesc($network),
1342                                 dbesc($platform),
1343                                 dbesc(datetime_convert()),
1344                                 dbesc($last_contact),
1345                                 dbesc($last_failure),
1346                                 dbesc(datetime_convert())
1347                 );
1348         }
1349         logger("End discovery for server ".$server_url, LOGGER_DEBUG);
1350
1351         return !$failure;
1352 }
1353
1354 function count_common_friends($uid,$cid) {
1355
1356         $r = q("SELECT count(*) as `total`
1357                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1358                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1359                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1360                 AND `gcontact`.`nurl` IN (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 and id != %d ) ",
1361                 intval($cid),
1362                 intval($uid),
1363                 intval($uid),
1364                 intval($cid)
1365         );
1366
1367 //      logger("count_common_friends: $uid $cid {$r[0]['total']}");
1368         if (dbm::is_result($r))
1369                 return $r[0]['total'];
1370         return 0;
1371
1372 }
1373
1374
1375 function common_friends($uid,$cid,$start = 0,$limit=9999,$shuffle = false) {
1376
1377         if($shuffle)
1378                 $sql_extra = " order by rand() ";
1379         else
1380                 $sql_extra = " order by `gcontact`.`name` asc ";
1381
1382         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1383                 FROM `glink`
1384                 INNER JOIN `gcontact` ON `glink`.`gcid` = `gcontact`.`id`
1385                 INNER JOIN `contact` ON `gcontact`.`nurl` = `contact`.`nurl`
1386                 WHERE `glink`.`cid` = %d and `glink`.`uid` = %d
1387                         AND `contact`.`uid` = %d AND `contact`.`self` = 0 AND `contact`.`blocked` = 0
1388                         AND `contact`.`hidden` = 0 AND `contact`.`id` != %d
1389                         AND ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1390                         $sql_extra LIMIT %d, %d",
1391                 intval($cid),
1392                 intval($uid),
1393                 intval($uid),
1394                 intval($cid),
1395                 intval($start),
1396                 intval($limit)
1397         );
1398
1399         return $r;
1400
1401 }
1402
1403
1404 function count_common_friends_zcid($uid,$zcid) {
1405
1406         $r = q("SELECT count(*) as `total`
1407                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1408                 where `glink`.`zcid` = %d
1409                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 ) ",
1410                 intval($zcid),
1411                 intval($uid)
1412         );
1413
1414         if (dbm::is_result($r))
1415                 return $r[0]['total'];
1416         return 0;
1417
1418 }
1419
1420 function common_friends_zcid($uid,$zcid,$start = 0, $limit = 9999,$shuffle = false) {
1421
1422         if($shuffle)
1423                 $sql_extra = " order by rand() ";
1424         else
1425                 $sql_extra = " order by `gcontact`.`name` asc ";
1426
1427         $r = q("SELECT `gcontact`.*
1428                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1429                 where `glink`.`zcid` = %d
1430                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 )
1431                 $sql_extra limit %d, %d",
1432                 intval($zcid),
1433                 intval($uid),
1434                 intval($start),
1435                 intval($limit)
1436         );
1437
1438         return $r;
1439
1440 }
1441
1442
1443 function count_all_friends($uid,$cid) {
1444
1445         $r = q("SELECT count(*) as `total`
1446                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1447                 where `glink`.`cid` = %d and `glink`.`uid` = %d AND
1448                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))",
1449                 intval($cid),
1450                 intval($uid)
1451         );
1452
1453         if (dbm::is_result($r))
1454                 return $r[0]['total'];
1455         return 0;
1456
1457 }
1458
1459
1460 function all_friends($uid,$cid,$start = 0, $limit = 80) {
1461
1462         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1463                 FROM `glink`
1464                 INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1465                 LEFT JOIN `contact` ON `contact`.`nurl` = `gcontact`.`nurl` AND `contact`.`uid` = %d
1466                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1467                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1468                 ORDER BY `gcontact`.`name` ASC LIMIT %d, %d ",
1469                 intval($uid),
1470                 intval($cid),
1471                 intval($uid),
1472                 intval($start),
1473                 intval($limit)
1474         );
1475
1476         return $r;
1477 }
1478
1479
1480
1481 function suggestion_query($uid, $start = 0, $limit = 80) {
1482
1483         if (!$uid) {
1484                 return array();
1485         }
1486
1487 // Uncommented because the result of the queries are to big to store it in the cache.
1488 // We need to decide if we want to change the db column type or if we want to delete it.
1489 //      $list = Cache::get("suggestion_query:".$uid.":".$start.":".$limit);
1490 //      if (!is_null($list)) {
1491 //              return $list;
1492 //      }
1493
1494         $network = array(NETWORK_DFRN);
1495
1496         if (get_config('system','diaspora_enabled'))
1497                 $network[] = NETWORK_DIASPORA;
1498
1499         if (!get_config('system','ostatus_disabled'))
1500                 $network[] = NETWORK_OSTATUS;
1501
1502         $sql_network = implode("', '", $network);
1503         $sql_network = "'".$sql_network."'";
1504
1505         /// @todo This query is really slow
1506         // By now we cache the data for five minutes
1507         $r = q("SELECT count(glink.gcid) as `total`, gcontact.* from gcontact
1508                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1509                 where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
1510                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1511                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1512                 AND `gcontact`.`updated` >= '%s'
1513                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1514                 AND `gcontact`.`network` IN (%s)
1515                 GROUP BY `glink`.`gcid` ORDER BY `gcontact`.`updated` DESC,`total` DESC LIMIT %d, %d",
1516                 intval($uid),
1517                 intval($uid),
1518                 intval($uid),
1519                 intval($uid),
1520                 dbesc(NULL_DATE),
1521                 $sql_network,
1522                 intval($start),
1523                 intval($limit)
1524         );
1525
1526         if (dbm::is_result($r) && count($r) >= ($limit -1)) {
1527 // Uncommented because the result of the queries are to big to store it in the cache.
1528 // We need to decide if we want to change the db column type or if we want to delete it.
1529 //              Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $r, CACHE_FIVE_MINUTES);
1530
1531                 return $r;
1532         }
1533
1534         $r2 = q("SELECT gcontact.* FROM gcontact
1535                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1536                 WHERE `glink`.`uid` = 0 AND `glink`.`cid` = 0 AND `glink`.`zcid` = 0 AND NOT `gcontact`.`nurl` IN (SELECT `nurl` FROM `contact` WHERE `uid` = %d)
1537                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1538                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1539                 AND `gcontact`.`updated` >= '%s'
1540                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1541                 AND `gcontact`.`network` IN (%s)
1542                 ORDER BY rand() LIMIT %d, %d",
1543                 intval($uid),
1544                 intval($uid),
1545                 intval($uid),
1546                 dbesc(NULL_DATE),
1547                 $sql_network,
1548                 intval($start),
1549                 intval($limit)
1550         );
1551
1552         $list = array();
1553         foreach ($r2 AS $suggestion)
1554                 $list[$suggestion["nurl"]] = $suggestion;
1555
1556         foreach ($r AS $suggestion)
1557                 $list[$suggestion["nurl"]] = $suggestion;
1558
1559         while (sizeof($list) > ($limit))
1560                 array_pop($list);
1561
1562 // Uncommented because the result of the queries are to big to store it in the cache.
1563 // We need to decide if we want to change the db column type or if we want to delete it.
1564 //      Cache::set("suggestion_query:".$uid.":".$start.":".$limit, $list, CACHE_FIVE_MINUTES);
1565         return $list;
1566 }
1567
1568 function update_suggestions() {
1569
1570         $a = get_app();
1571
1572         $done = array();
1573
1574         /// @TODO Check if it is really neccessary to poll the own server
1575         poco_load(0,0,0,App::get_baseurl() . '/poco');
1576
1577         $done[] = App::get_baseurl() . '/poco';
1578
1579         if (strlen(get_config('system','directory'))) {
1580                 $x = fetch_url(get_server()."/pubsites");
1581                 if ($x) {
1582                         $j = json_decode($x);
1583                         if ($j->entries) {
1584                                 foreach ($j->entries as $entry) {
1585
1586                                         poco_check_server($entry->url);
1587
1588                                         $url = $entry->url . '/poco';
1589                                         if (! in_array($url,$done)) {
1590                                                 poco_load(0,0,0,$entry->url . '/poco');
1591                                         }
1592                                 }
1593                         }
1594                 }
1595         }
1596
1597         // Query your contacts from Friendica and Redmatrix/Hubzilla for their contacts
1598         $r = q("SELECT DISTINCT(`poco`) AS `poco` FROM `contact` WHERE `network` IN ('%s', '%s')",
1599                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA)
1600         );
1601
1602         if (dbm::is_result($r)) {
1603                 foreach ($r as $rr) {
1604                         $base = substr($rr['poco'],0,strrpos($rr['poco'],'/'));
1605                         if(! in_array($base,$done))
1606                                 poco_load(0,0,0,$base);
1607                 }
1608         }
1609 }
1610
1611 /**
1612  * @brief Fetch server list from remote servers and adds them when they are new.
1613  *
1614  * @param string $poco URL to the POCO endpoint
1615  */
1616 function poco_fetch_serverlist($poco) {
1617         $serverret = z_fetch_url($poco."/@server");
1618         if (!$serverret["success"]) {
1619                 return;
1620         }
1621         $serverlist = json_decode($serverret['body']);
1622
1623         if (!is_array($serverlist)) {
1624                 return;
1625         }
1626
1627         foreach ($serverlist AS $server) {
1628                 $server_url = str_replace("/index.php", "", $server->url);
1629
1630                 $r = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
1631                 if (!dbm::is_result($r)) {
1632                         logger("Call server check for server ".$server_url, LOGGER_DEBUG);
1633                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode($server_url));
1634                 }
1635         }
1636 }
1637
1638 function poco_discover_federation() {
1639         $last = get_config('poco','last_federation_discovery');
1640
1641         if ($last) {
1642                 $next = $last + (24 * 60 * 60);
1643                 if($next > time())
1644                         return;
1645         }
1646
1647         // Discover Friendica, Hubzilla and Diaspora servers
1648         $serverdata = fetch_url("http://the-federation.info/pods.json");
1649
1650         if ($serverdata) {
1651                 $servers = json_decode($serverdata);
1652
1653                 foreach ($servers->pods AS $server) {
1654                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "server", base64_encode("https://".$server->host));
1655                 }
1656         }
1657
1658         // Currently disabled, since the service isn't available anymore.
1659         // It is not removed since I hope that there will be a successor.
1660         // Discover GNU Social Servers.
1661         //if (!get_config('system','ostatus_disabled')) {
1662         //      $serverdata = "http://gstools.org/api/get_open_instances/";
1663
1664         //      $result = z_fetch_url($serverdata);
1665         //      if ($result["success"]) {
1666         //              $servers = json_decode($result["body"]);
1667
1668         //              foreach($servers->data AS $server)
1669         //                      poco_check_server($server->instance_address);
1670         //      }
1671         //}
1672
1673         set_config('poco','last_federation_discovery', time());
1674 }
1675
1676 function poco_discover_single_server($id) {
1677         $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `id` = %d", intval($id));
1678         if (!dbm::is_result($r)) {
1679                 return false;
1680         }
1681
1682         $server = $r[0];
1683
1684         // Discover new servers out there (Works from Friendica version 3.5.2)
1685         poco_fetch_serverlist($server["poco"]);
1686
1687         // Fetch all users from the other server
1688         $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1689
1690         logger("Fetch all users from the server ".$server["url"], LOGGER_DEBUG);
1691
1692         $retdata = z_fetch_url($url);
1693         if ($retdata["success"]) {
1694                 $data = json_decode($retdata["body"]);
1695
1696                 poco_discover_server($data, 2);
1697
1698                 if (get_config('system','poco_discovery') > 1) {
1699
1700                         $timeframe = get_config('system','poco_discovery_since');
1701                         if ($timeframe == 0) {
1702                                 $timeframe = 30;
1703                         }
1704
1705                         $updatedSince = date("Y-m-d H:i:s", time() - $timeframe * 86400);
1706
1707                         // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1708                         $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1709
1710                         $success = false;
1711
1712                         $retdata = z_fetch_url($url);
1713                         if ($retdata["success"]) {
1714                                 logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1715                                 $success = poco_discover_server(json_decode($retdata["body"]));
1716                         }
1717
1718                         if (!$success AND (get_config('system','poco_discovery') > 2)) {
1719                                 logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1720                                 poco_discover_server_users($data, $server);
1721                         }
1722                 }
1723
1724                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1725
1726                 return true;
1727         } else {
1728                 // If the server hadn't replied correctly, then force a sanity check
1729                 poco_check_server($server["url"], $server["network"], true);
1730
1731                 // If we couldn't reach the server, we will try it some time later
1732                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1733
1734                 return false;
1735         }
1736 }
1737
1738 function poco_discover($complete = false) {
1739
1740         // Update the server list
1741         poco_discover_federation();
1742
1743         $no_of_queries = 5;
1744
1745         $requery_days = intval(get_config("system", "poco_requery_days"));
1746
1747         if ($requery_days == 0) {
1748                 $requery_days = 7;
1749         }
1750         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1751
1752         $r = q("SELECT `id`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1753         if (dbm::is_result($r)) {
1754                 foreach ($r AS $server) {
1755
1756                         if (!poco_check_server($server["url"], $server["network"])) {
1757                                 // The server is not reachable? Okay, then we will try it later
1758                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1759                                 continue;
1760                         }
1761
1762                         logger('Update directory from server '.$server['url'].' with ID '.$server['id'], LOGGER_DEBUG);
1763                         proc_run(PRIORITY_LOW, "include/discover_poco.php", "update_server_directory", intval($server['id']));
1764
1765                         if (!$complete AND (--$no_of_queries == 0)) {
1766                                 break;
1767                         }
1768                 }
1769         }
1770 }
1771
1772 function poco_discover_server_users($data, $server) {
1773
1774         if (!isset($data->entry))
1775                 return;
1776
1777         foreach ($data->entry AS $entry) {
1778                 $username = "";
1779                 if (isset($entry->urls)) {
1780                         foreach($entry->urls as $url)
1781                                 if ($url->type == 'profile') {
1782                                         $profile_url = $url->value;
1783                                         $urlparts = parse_url($profile_url);
1784                                         $username = end(explode("/", $urlparts["path"]));
1785                                 }
1786                 }
1787                 if ($username != "") {
1788                         logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1789
1790                         // Fetch all contacts from a given user from the other server
1791                         $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,contactType,generation";
1792
1793                         $retdata = z_fetch_url($url);
1794                         if ($retdata["success"])
1795                                 poco_discover_server(json_decode($retdata["body"]), 3);
1796                 }
1797         }
1798 }
1799
1800 function poco_discover_server($data, $default_generation = 0) {
1801
1802         if (!isset($data->entry) OR !count($data->entry))
1803                 return false;
1804
1805         $success = false;
1806
1807         foreach ($data->entry AS $entry) {
1808                 $profile_url = '';
1809                 $profile_photo = '';
1810                 $connect_url = '';
1811                 $name = '';
1812                 $network = '';
1813                 $updated = NULL_DATE;
1814                 $location = '';
1815                 $about = '';
1816                 $keywords = '';
1817                 $gender = '';
1818                 $contact_type = -1;
1819                 $generation = $default_generation;
1820
1821                 $name = $entry->displayName;
1822
1823                 if (isset($entry->urls)) {
1824                         foreach($entry->urls as $url) {
1825                                 if ($url->type == 'profile') {
1826                                         $profile_url = $url->value;
1827                                         continue;
1828                                 }
1829                                 if ($url->type == 'webfinger') {
1830                                         $connect_url = str_replace('acct:' , '', $url->value);
1831                                         continue;
1832                                 }
1833                         }
1834                 }
1835
1836                 if (isset($entry->photos)) {
1837                         foreach ($entry->photos as $photo) {
1838                                 if ($photo->type == 'profile') {
1839                                         $profile_photo = $photo->value;
1840                                         continue;
1841                                 }
1842                         }
1843                 }
1844
1845                 if (isset($entry->updated)) {
1846                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
1847                 }
1848
1849                 if(isset($entry->network)) {
1850                         $network = $entry->network;
1851                 }
1852
1853                 if(isset($entry->currentLocation)) {
1854                         $location = $entry->currentLocation;
1855                 }
1856
1857                 if(isset($entry->aboutMe)) {
1858                         $about = html2bbcode($entry->aboutMe);
1859                 }
1860
1861                 if(isset($entry->gender)) {
1862                         $gender = $entry->gender;
1863                 }
1864
1865                 if(isset($entry->generation) AND ($entry->generation > 0)) {
1866                         $generation = ++$entry->generation;
1867                 }
1868
1869                 if(isset($entry->contactType) AND ($entry->contactType >= 0)) {
1870                         $contact_type = $entry->contactType;
1871                 }
1872
1873                 if(isset($entry->tags)) {
1874                         foreach ($entry->tags as $tag) {
1875                                 $keywords = implode(", ", $tag);
1876                         }
1877                 }
1878
1879                 if ($generation > 0) {
1880                         $success = true;
1881
1882                         logger("Store profile ".$profile_url, LOGGER_DEBUG);
1883
1884                         $gcontact = array("url" => $profile_url,
1885                                         "name" => $name,
1886                                         "network" => $network,
1887                                         "photo" => $profile_photo,
1888                                         "about" => $about,
1889                                         "location" => $location,
1890                                         "gender" => $gender,
1891                                         "keywords" => $keywords,
1892                                         "connect" => $connect_url,
1893                                         "updated" => $updated,
1894                                         "contact-type" => $contact_type,
1895                                         "generation" => $generation);
1896
1897                         try {
1898                                 $gcontact = sanitize_gcontact($gcontact);
1899                                 update_gcontact($gcontact);
1900                         } catch (Exception $e) {
1901                                 logger($e->getMessage(), LOGGER_DEBUG);
1902                         }
1903
1904                         logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1905                 }
1906         }
1907         return $success;
1908 }
1909
1910 /**
1911  * @brief Removes unwanted parts from a contact url
1912  *
1913  * @param string $url Contact url
1914  * @return string Contact url with the wanted parts
1915  */
1916 function clean_contact_url($url) {
1917         $parts = parse_url($url);
1918
1919         if (!isset($parts["scheme"]) OR !isset($parts["host"]))
1920                 return $url;
1921
1922         $new_url = $parts["scheme"]."://".$parts["host"];
1923
1924         if (isset($parts["port"]))
1925                 $new_url .= ":".$parts["port"];
1926
1927         if (isset($parts["path"]))
1928                 $new_url .= $parts["path"];
1929
1930         if ($new_url != $url)
1931                 logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".App::callstack(), LOGGER_DEBUG);
1932
1933         return $new_url;
1934 }
1935
1936 /**
1937  * @brief Replace alternate OStatus user format with the primary one
1938  *
1939  * @param arr $contact contact array (called by reference)
1940  */
1941 function fix_alternate_contact_address(&$contact) {
1942         if (($contact["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($contact["url"])) {
1943                 $data = probe_url($contact["url"]);
1944                 if ($contact["network"] == NETWORK_OSTATUS) {
1945                         logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1946                         $contact["url"] = $data["url"];
1947                         $contact["addr"] = $data["addr"];
1948                         $contact["alias"] = $data["alias"];
1949                         $contact["server_url"] = $data["baseurl"];
1950                 }
1951         }
1952 }
1953
1954 /**
1955  * @brief Fetch the gcontact id, add an entry if not existed
1956  *
1957  * @param arr $contact contact array
1958  * @return bool|int Returns false if not found, integer if contact was found
1959  */
1960 function get_gcontact_id($contact) {
1961
1962         $gcontact_id = 0;
1963         $doprobing = false;
1964
1965         if (in_array($contact["network"], array(NETWORK_PHANTOM))) {
1966                 logger("Invalid network for contact url ".$contact["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1967                 return false;
1968         }
1969
1970         if ($contact["network"] == NETWORK_STATUSNET)
1971                 $contact["network"] = NETWORK_OSTATUS;
1972
1973         // All new contacts are hidden by default
1974         if (!isset($contact["hide"]))
1975                 $contact["hide"] = true;
1976
1977         // Replace alternate OStatus user format with the primary one
1978         fix_alternate_contact_address($contact);
1979
1980         // Remove unwanted parts from the contact url (e.g. "?zrl=...")
1981         if (in_array($contact["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)))
1982                 $contact["url"] = clean_contact_url($contact["url"]);
1983
1984         $r = q("SELECT `id`, `last_contact`, `last_failure`, `network` FROM `gcontact` WHERE `nurl` = '%s' LIMIT 2",
1985                 dbesc(normalise_link($contact["url"])));
1986
1987         if ($r) {
1988                 $gcontact_id = $r[0]["id"];
1989
1990                 // Update every 90 days
1991                 if (in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
1992                         $last_failure_str = $r[0]["last_failure"];
1993                         $last_failure = strtotime($r[0]["last_failure"]);
1994                         $last_contact_str = $r[0]["last_contact"];
1995                         $last_contact = strtotime($r[0]["last_contact"]);
1996                         $doprobing = (((time() - $last_contact) > (90 * 86400)) AND ((time() - $last_failure) > (90 * 86400)));
1997                 }
1998         } else {
1999                 q("INSERT INTO `gcontact` (`name`, `nick`, `addr` , `network`, `url`, `nurl`, `photo`, `created`, `updated`, `location`, `about`, `hide`, `generation`)
2000                         VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d)",
2001                         dbesc($contact["name"]),
2002                         dbesc($contact["nick"]),
2003                         dbesc($contact["addr"]),
2004                         dbesc($contact["network"]),
2005                         dbesc($contact["url"]),
2006                         dbesc(normalise_link($contact["url"])),
2007                         dbesc($contact["photo"]),
2008                         dbesc(datetime_convert()),
2009                         dbesc(datetime_convert()),
2010                         dbesc($contact["location"]),
2011                         dbesc($contact["about"]),
2012                         intval($contact["hide"]),
2013                         intval($contact["generation"])
2014                 );
2015
2016                 $r = q("SELECT `id`, `network` FROM `gcontact` WHERE `nurl` = '%s' ORDER BY `id` LIMIT 2",
2017                         dbesc(normalise_link($contact["url"])));
2018
2019                 if ($r) {
2020                         $gcontact_id = $r[0]["id"];
2021
2022                         $doprobing = in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""));
2023                 }
2024         }
2025
2026         if ($doprobing) {
2027                 logger("Last Contact: ". $last_contact_str." - Last Failure: ".$last_failure_str." - Checking: ".$contact["url"], LOGGER_DEBUG);
2028                 proc_run(PRIORITY_LOW, 'include/gprobe.php', bin2hex($contact["url"]));
2029         }
2030
2031         if ((dbm::is_result($r)) AND (count($r) > 1) AND ($gcontact_id > 0) AND ($contact["url"] != ""))
2032          q("DELETE FROM `gcontact` WHERE `nurl` = '%s' AND `id` != %d",
2033                 dbesc(normalise_link($contact["url"])),
2034                 intval($gcontact_id));
2035
2036         return $gcontact_id;
2037 }
2038
2039 /**
2040  * @brief Updates the gcontact table from a given array
2041  *
2042  * @param arr $contact contact array
2043  * @return bool|int Returns false if not found, integer if contact was found
2044  */
2045 function update_gcontact($contact) {
2046
2047         // Check for invalid "contact-type" value
2048         if (isset($contact['contact-type']) AND (intval($contact['contact-type']) < 0)) {
2049                 $contact['contact-type'] = 0;
2050         }
2051
2052         /// @todo update contact table as well
2053
2054         $gcontact_id = get_gcontact_id($contact);
2055
2056         if (!$gcontact_id)
2057                 return false;
2058
2059         $r = q("SELECT `name`, `nick`, `photo`, `location`, `about`, `addr`, `generation`, `birthday`, `gender`, `keywords`,
2060                         `contact-type`, `hide`, `nsfw`, `network`, `alias`, `notify`, `server_url`, `connect`, `updated`, `url`
2061                 FROM `gcontact` WHERE `id` = %d LIMIT 1",
2062                 intval($gcontact_id));
2063
2064         // Get all field names
2065         $fields = array();
2066         foreach ($r[0] AS $field => $data)
2067                 $fields[$field] = $data;
2068
2069         unset($fields["url"]);
2070         unset($fields["updated"]);
2071         unset($fields["hide"]);
2072
2073         // Bugfix: We had an error in the storing of keywords which lead to the "0"
2074         // This value is still transmitted via poco.
2075         if ($contact["keywords"] == "0")
2076                 unset($contact["keywords"]);
2077
2078         if ($r[0]["keywords"] == "0")
2079                 $r[0]["keywords"] = "";
2080
2081         // assign all unassigned fields from the database entry
2082         foreach ($fields AS $field => $data)
2083                 if (!isset($contact[$field]) OR ($contact[$field] == ""))
2084                         $contact[$field] = $r[0][$field];
2085
2086         if (!isset($contact["hide"]))
2087                 $contact["hide"] = $r[0]["hide"];
2088
2089         $fields["hide"] = $r[0]["hide"];
2090
2091         if ($contact["network"] == NETWORK_STATUSNET)
2092                 $contact["network"] = NETWORK_OSTATUS;
2093
2094         // Replace alternate OStatus user format with the primary one
2095         fix_alternate_contact_address($contact);
2096
2097         if (!isset($contact["updated"]))
2098                 $contact["updated"] = datetime_convert();
2099
2100         if ($contact["server_url"] == "") {
2101                 $server_url = $contact["url"];
2102
2103                 $server_url = matching_url($server_url, $contact["alias"]);
2104                 if ($server_url != "")
2105                         $contact["server_url"] = $server_url;
2106
2107                 $server_url = matching_url($server_url, $contact["photo"]);
2108                 if ($server_url != "")
2109                         $contact["server_url"] = $server_url;
2110
2111                 $server_url = matching_url($server_url, $contact["notify"]);
2112                 if ($server_url != "")
2113                         $contact["server_url"] = $server_url;
2114         } else
2115                 $contact["server_url"] = normalise_link($contact["server_url"]);
2116
2117         if (($contact["addr"] == "") AND ($contact["server_url"] != "") AND ($contact["nick"] != "")) {
2118                 $hostname = str_replace("http://", "", $contact["server_url"]);
2119                 $contact["addr"] = $contact["nick"]."@".$hostname;
2120         }
2121
2122         // Check if any field changed
2123         $update = false;
2124         unset($fields["generation"]);
2125
2126         if ((($contact["generation"] > 0) AND ($contact["generation"] <= $r[0]["generation"])) OR ($r[0]["generation"] == 0)) {
2127                 foreach ($fields AS $field => $data)
2128                         if ($contact[$field] != $r[0][$field]) {
2129                                 logger("Difference for contact ".$contact["url"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
2130                                 $update = true;
2131                         }
2132
2133                 if ($contact["generation"] < $r[0]["generation"]) {
2134                         logger("Difference for contact ".$contact["url"]." in field 'generation'. new value: '".$contact["generation"]."', old value '".$r[0]["generation"]."'", LOGGER_DEBUG);
2135                         $update = true;
2136                 }
2137         }
2138
2139         if ($update) {
2140                 logger("Update gcontact for ".$contact["url"], LOGGER_DEBUG);
2141
2142                 q("UPDATE `gcontact` SET `photo` = '%s', `name` = '%s', `nick` = '%s', `addr` = '%s', `network` = '%s',
2143                                         `birthday` = '%s', `gender` = '%s', `keywords` = '%s', `hide` = %d, `nsfw` = %d,
2144                                         `contact-type` = %d, `alias` = '%s', `notify` = '%s', `url` = '%s',
2145                                         `location` = '%s', `about` = '%s', `generation` = %d, `updated` = '%s',
2146                                         `server_url` = '%s', `connect` = '%s'
2147                                 WHERE `nurl` = '%s' AND (`generation` = 0 OR `generation` >= %d)",
2148                         dbesc($contact["photo"]), dbesc($contact["name"]), dbesc($contact["nick"]),
2149                         dbesc($contact["addr"]), dbesc($contact["network"]), dbesc($contact["birthday"]),
2150                         dbesc($contact["gender"]), dbesc($contact["keywords"]), intval($contact["hide"]),
2151                         intval($contact["nsfw"]), intval($contact["contact-type"]), dbesc($contact["alias"]),
2152                         dbesc($contact["notify"]), dbesc($contact["url"]), dbesc($contact["location"]),
2153                         dbesc($contact["about"]), intval($contact["generation"]), dbesc($contact["updated"]),
2154                         dbesc($contact["server_url"]), dbesc($contact["connect"]),
2155                         dbesc(normalise_link($contact["url"])), intval($contact["generation"]));
2156
2157
2158                 // Now update the contact entry with the user id "0" as well.
2159                 // This is used for the shadow copies of public items.
2160                 $r = q("SELECT `id` FROM `contact` WHERE `nurl` = '%s' AND `uid` = 0 ORDER BY `id` LIMIT 1",
2161                         dbesc(normalise_link($contact["url"])));
2162
2163                 if ($r) {
2164                         logger("Update shadow contact ".$r[0]["id"], LOGGER_DEBUG);
2165
2166                         update_contact_avatar($contact["photo"], 0, $r[0]["id"]);
2167
2168                         q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s',
2169                                                 `network` = '%s', `bd` = '%s', `gender` = '%s',
2170                                                 `keywords` = '%s', `alias` = '%s', `contact-type` = %d,
2171                                                 `url` = '%s', `location` = '%s', `about` = '%s'
2172                                         WHERE `id` = %d",
2173                                 dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["addr"]),
2174                                 dbesc($contact["network"]), dbesc($contact["birthday"]), dbesc($contact["gender"]),
2175                                 dbesc($contact["keywords"]), dbesc($contact["alias"]), intval($contact["contact-type"]),
2176                                 dbesc($contact["url"]), dbesc($contact["location"]), dbesc($contact["about"]),
2177                                 intval($r[0]["id"]));
2178                 }
2179         }
2180
2181         return $gcontact_id;
2182 }
2183
2184 /**
2185  * @brief Updates the gcontact entry from probe
2186  *
2187  * @param str $url profile link
2188  */
2189 function update_gcontact_from_probe($url) {
2190         $data = probe_url($url);
2191
2192         if (in_array($data["network"], array(NETWORK_PHANTOM))) {
2193                 logger("Invalid network for contact url ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
2194                 return;
2195         }
2196
2197         $data["server_url"] = $data["baseurl"];
2198
2199         update_gcontact($data);
2200 }
2201
2202 /**
2203  * @brief Update the gcontact entry for a given user id
2204  *
2205  * @param int $uid User ID
2206  */
2207 function update_gcontact_for_user($uid) {
2208         $r = q("SELECT `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
2209                         `profile`.`name`, `profile`.`about`, `profile`.`gender`,
2210                         `profile`.`pub_keywords`, `profile`.`dob`, `profile`.`photo`,
2211                         `profile`.`net-publish`, `user`.`nickname`, `user`.`hidewall`,
2212                         `contact`.`notify`, `contact`.`url`, `contact`.`addr`
2213                 FROM `profile`
2214                         INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
2215                         INNER JOIN `contact` ON `contact`.`uid` = `profile`.`uid`
2216                 WHERE `profile`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self`",
2217                 intval($uid));
2218
2219         $location = formatted_location(array("locality" => $r[0]["locality"], "region" => $r[0]["region"],
2220                                                 "country-name" => $r[0]["country-name"]));
2221
2222         // The "addr" field was added in 3.4.3 so it can be empty for older users
2223         if ($r[0]["addr"] != "")
2224                 $addr = $r[0]["nickname"].'@'.str_replace(array("http://", "https://"), "", App::get_baseurl());
2225         else
2226                 $addr = $r[0]["addr"];
2227
2228         $gcontact = array("name" => $r[0]["name"], "location" => $location, "about" => $r[0]["about"],
2229                         "gender" => $r[0]["gender"], "keywords" => $r[0]["pub_keywords"],
2230                         "birthday" => $r[0]["dob"], "photo" => $r[0]["photo"],
2231                         "notify" => $r[0]["notify"], "url" => $r[0]["url"],
2232                         "hide" => ($r[0]["hidewall"] OR !$r[0]["net-publish"]),
2233                         "nick" => $r[0]["nickname"], "addr" => $addr,
2234                         "connect" => $addr, "server_url" => App::get_baseurl(),
2235                         "generation" => 1, "network" => NETWORK_DFRN);
2236
2237         update_gcontact($gcontact);
2238 }
2239
2240 /**
2241  * @brief Fetches users of given GNU Social server
2242  *
2243  * If the "Statistics" plugin is enabled (See http://gstools.org/ for details) we query user data with this.
2244  *
2245  * @param str $server Server address
2246  */
2247 function gs_fetch_users($server) {
2248
2249         logger("Fetching users from GNU Social server ".$server, LOGGER_DEBUG);
2250
2251         $url = $server."/main/statistics";
2252
2253         $result = z_fetch_url($url);
2254         if (!$result["success"])
2255                 return false;
2256
2257         $statistics = json_decode($result["body"]);
2258
2259         if (is_object($statistics->config)) {
2260                 if ($statistics->config->instance_with_ssl)
2261                         $server = "https://";
2262                 else
2263                         $server = "http://";
2264
2265                 $server .= $statistics->config->instance_address;
2266
2267                 $hostname = $statistics->config->instance_address;
2268         } else {
2269                 if ($statistics->instance_with_ssl)
2270                         $server = "https://";
2271                 else
2272                         $server = "http://";
2273
2274                 $server .= $statistics->instance_address;
2275
2276                 $hostname = $statistics->instance_address;
2277         }
2278
2279         if (is_object($statistics->users))
2280                 foreach ($statistics->users AS $nick => $user) {
2281                         $profile_url = $server."/".$user->nickname;
2282
2283                         $contact = array("url" => $profile_url,
2284                                         "name" => $user->fullname,
2285                                         "addr" => $user->nickname."@".$hostname,
2286                                         "nick" => $user->nickname,
2287                                         "about" => $user->bio,
2288                                         "network" => NETWORK_OSTATUS,
2289                                         "photo" => App::get_baseurl()."/images/person-175.jpg");
2290                         get_gcontact_id($contact);
2291                 }
2292 }
2293
2294 /**
2295  * @brief Asking GNU Social server on a regular base for their user data
2296  *
2297  */
2298 function gs_discover() {
2299
2300         $requery_days = intval(get_config("system", "poco_requery_days"));
2301
2302         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
2303
2304         $r = q("SELECT `nurl`, `url` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `network` = '%s' AND `last_poco_query` < '%s' ORDER BY RAND() LIMIT 5",
2305                 dbesc(NETWORK_OSTATUS), dbesc($last_update));
2306
2307         if (!$r)
2308                 return;
2309
2310         foreach ($r AS $server) {
2311                 gs_fetch_users($server["url"]);
2312                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
2313         }
2314 }
2315
2316 /**
2317  * @brief Returns a list of all known servers
2318  * @return array List of server urls
2319  */
2320 function poco_serverlist() {
2321         $r = q("SELECT `url`, `site_name` AS `displayName`, `network`, `platform`, `version` FROM `gserver`
2322                 WHERE `network` IN ('%s', '%s', '%s') AND `last_contact` > `last_failure`
2323                 ORDER BY `last_contact`
2324                 LIMIT 1000",
2325                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA), dbesc(NETWORK_OSTATUS));
2326         if (!dbm::is_result($r)) {
2327                 return false;
2328         }
2329         return $r;
2330 }
2331 ?>