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/html2bbcode.php");
  13 require_once("include/Contact.php");
  14 require_once("include/Photo.php");
  15
  16 /*
  17  * poco_load
  18  *
  19  * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
  20  * and add the entries to the gcontact (Global Contact) table, or update existing entries
  21  * if anything (name or photo) has changed.
  22  * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
  23  *
  24  * Once the global contact is stored add (if necessary) the contact linkage which associates
  25  * the given uid, cid to the global contact entry. There can be many uid/cid combinations
  26  * pointing to the same global contact id.
  27  *
  28  */
  29
  30
  31
  32
  33 function poco_load($cid,$uid = 0,$zcid = 0,$url = null) {
  34
  35         $a = get_app();
  36
  37         if($cid) {
  38                 if((! $url) || (! $uid)) {
  39                         $r = q("select `poco`, `uid` from `contact` where `id` = %d limit 1",
  40                                 intval($cid)
  41                         );
  42                         if(count($r)) {
  43                                 $url = $r[0]['poco'];
  44                                 $uid = $r[0]['uid'];
  45                         }
  46                 }
  47                 if(! $uid)
  48                         return;
  49         }
  50
  51         if(! $url)
  52                 return;
  53
  54         $url = $url . (($uid) ? '/@me/@all?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,generation' : '?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,generation') ;
  55
  56         logger('poco_load: ' . $url, LOGGER_DEBUG);
  57
  58         $s = fetch_url($url);
  59
  60         logger('poco_load: returns ' . $s, LOGGER_DATA);
  61
  62         logger('poco_load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);
  63
  64         if(($a->get_curl_code() > 299) || (! $s))
  65                 return;
  66
  67         $j = json_decode($s);
  68
  69         logger('poco_load: json: ' . print_r($j,true),LOGGER_DATA);
  70
  71         if(! isset($j->entry))
  72                 return;
  73
  74         $total = 0;
  75         foreach($j->entry as $entry) {
  76
  77                 $total ++;
  78                 $profile_url = '';
  79                 $profile_photo = '';
  80                 $connect_url = '';
  81                 $name = '';
  82                 $network = '';
  83                 $updated = '0000-00-00 00:00:00';
  84                 $location = '';
  85                 $about = '';
  86                 $keywords = '';
  87                 $gender = '';
  88                 $generation = 0;
  89
  90                 $name = $entry->displayName;
  91
  92                 if(isset($entry->urls)) {
  93                         foreach($entry->urls as $url) {
  94                                 if($url->type == 'profile') {
  95                                         $profile_url = $url->value;
  96                                         continue;
  97                                 }
  98                                 if($url->type == 'webfinger') {
  99                                         $connect_url = str_replace('acct:' , '', $url->value);
 100                                         continue;
 101                                 }
 102                         }
 103                 }
 104                 if(isset($entry->photos)) {
 105                         foreach($entry->photos as $photo) {
 106                                 if($photo->type == 'profile') {
 107                                         $profile_photo = $photo->value;
 108                                         continue;
 109                                 }
 110                         }
 111                 }
 112
 113                 if(isset($entry->updated))
 114                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
 115
 116                 if(isset($entry->network))
 117                         $network = $entry->network;
 118
 119                 if(isset($entry->currentLocation))
 120                         $location = $entry->currentLocation;
 121
 122                 if(isset($entry->aboutMe))
 123                         $about = html2bbcode($entry->aboutMe);
 124
 125                 if(isset($entry->gender))
 126                         $gender = $entry->gender;
 127
 128                 if(isset($entry->generation) AND ($entry->generation > 0))
 129                         $generation = ++$entry->generation;
 130
 131                 if(isset($entry->tags))
 132                         foreach($entry->tags as $tag)
 133                                 $keywords = implode(", ", $tag);
 134
 135                 // If you query a Friendica server for its profiles, the network has to be Friendica
 136                 /// TODO It could also be a Redmatrix server
 137                 //if ($uid == 0)
 138                 //      $network = NETWORK_DFRN;
 139
 140                 poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, $cid, $uid, $zcid);
 141
 142                 // Update the Friendica contacts. Diaspora is doing it via a message. (See include/diaspora.php)
 143                 // Deactivated because we now update Friendica contacts in dfrn.php
 144                 //if (($location != "") OR ($about != "") OR ($keywords != "") OR ($gender != ""))
 145                 //      q("UPDATE `contact` SET `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s'
 146                 //              WHERE `nurl` = '%s' AND NOT `self` AND `network` = '%s'",
 147                 //              dbesc($location),
 148                 //              dbesc($about),
 149                 //              dbesc($keywords),
 150                 //              dbesc($gender),
 151                 //              dbesc(normalise_link($profile_url)),
 152                 //              dbesc(NETWORK_DFRN));
 153         }
 154         logger("poco_load: loaded $total entries",LOGGER_DEBUG);
 155
 156         q("DELETE FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `zcid` = %d AND `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY",
 157                 intval($cid),
 158                 intval($uid),
 159                 intval($zcid)
 160         );
 161
 162 }
 163
 164 function poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, $cid = 0, $uid = 0, $zcid = 0) {
 165
 166         $a = get_app();
 167
 168         // Generation:
 169         //  0: No definition
 170         //  1: Profiles on this server
 171         //  2: Contacts of profiles on this server
 172         //  3: Contacts of contacts of profiles on this server
 173         //  4: ...
 174
 175         $gcid = "";
 176
 177         if ($profile_url == "")
 178                 return $gcid;
 179
 180         $urlparts = parse_url($profile_url);
 181         if (!isset($urlparts["scheme"]))
 182                 return $gcid;
 183
 184         if (in_array($urlparts["host"], array("www.facebook.com", "facebook.com", "twitter.com",
 185                                                 "identi.ca", "alpha.app.net")))
 186                 return $gcid;
 187
 188         // Don't store the statusnet connector as network
 189         // We can't simply set this to NETWORK_OSTATUS since the connector could have fetched posts from friendica as well
 190         if ($network == NETWORK_STATUSNET)
 191                 $network = "";
 192
 193         // Assure that there are no parameter fragments in the profile url
 194         if (in_array($network, array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, "")))
 195                 $profile_url = clean_contact_url($profile_url);
 196
 197         $alternate = poco_alternate_ostatus_url($profile_url);
 198
 199         $orig_updated = $updated;
 200
 201         // The global contacts should contain the original picture, not the cached one
 202         if (($generation != 1) AND stristr(normalise_link($profile_photo), normalise_link($a->get_baseurl()."/photo/")))
 203                 $profile_photo = "";
 204
 205         $r = q("SELECT `network` FROM `contact` WHERE `nurl` = '%s' AND `network` != '' AND `network` != '%s' LIMIT 1",
 206                 dbesc(normalise_link($profile_url)), dbesc(NETWORK_STATUSNET)
 207         );
 208         if(count($r))
 209                 $network = $r[0]["network"];
 210
 211         if (($network == "") OR ($network == NETWORK_OSTATUS)) {
 212                 $r = q("SELECT `network`, `url` FROM `contact` WHERE `alias` IN ('%s', '%s') AND `network` != '' AND `network` != '%s' LIMIT 1",
 213                         dbesc($profile_url), dbesc(normalise_link($profile_url)), dbesc(NETWORK_STATUSNET)
 214                 );
 215                 if(count($r)) {
 216                         $network = $r[0]["network"];
 217                         //$profile_url = $r[0]["url"];
 218                 }
 219         }
 220
 221         $x = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s' LIMIT 1",
 222                 dbesc(normalise_link($profile_url))
 223         );
 224
 225         if (count($x)) {
 226                 if (($network == "") AND ($x[0]["network"] != NETWORK_STATUSNET))
 227                         $network = $x[0]["network"];
 228
 229                 if ($updated == "0000-00-00 00:00:00")
 230                         $updated = $x[0]["updated"];
 231
 232                 $created = $x[0]["created"];
 233                 $server_url = $x[0]["server_url"];
 234                 $nick = $x[0]["nick"];
 235                 $addr = $x[0]["addr"];
 236                 $alias =  $x[0]["alias"];
 237                 $notify =  $x[0]["notify"];
 238         } else {
 239                 $created = "0000-00-00 00:00:00";
 240                 $server_url = "";
 241
 242                 $urlparts = parse_url($profile_url);
 243                 $nick = end(explode("/", $urlparts["path"]));
 244                 $addr = "";
 245                 $alias = "";
 246                 $notify = "";
 247         }
 248
 249         if ((($network == "") OR ($name == "") OR ($addr == "") OR ($profile_photo == "") OR ($server_url == "") OR $alternate)
 250                 AND poco_reachable($profile_url, $server_url, $network, false)) {
 251                 $data = probe_url($profile_url);
 252
 253                 $orig_profile = $profile_url;
 254
 255                 $network = $data["network"];
 256                 $name = $data["name"];
 257                 $nick = $data["nick"];
 258                 $addr = $data["addr"];
 259                 $alias = $data["alias"];
 260                 $notify = $data["notify"];
 261                 $profile_url = $data["url"];
 262                 $profile_photo = $data["photo"];
 263                 $server_url = $data["baseurl"];
 264
 265                 if ($alternate AND ($network == NETWORK_OSTATUS)) {
 266                         // Delete the old entry - if it exists
 267                         $r = q("SELECT `id` FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 268                         if ($r) {
 269                                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($orig_profile)));
 270                                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($r[0]["id"]));
 271                         }
 272
 273                         // possibly create a new entry
 274                         poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, $cid, $uid, $zcid);
 275                 }
 276         }
 277
 278         if ($alternate AND ($network == NETWORK_OSTATUS))
 279                 return $gcid;
 280
 281         if (count($x) AND ($x[0]["network"] == "") AND ($network != "")) {
 282                 q("UPDATE `gcontact` SET `network` = '%s' WHERE `nurl` = '%s'",
 283                         dbesc($network),
 284                         dbesc(normalise_link($profile_url))
 285                 );
 286         }
 287
 288         if (($name == "") OR ($profile_photo == ""))
 289                 return $gcid;
 290
 291         if (!in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS, NETWORK_DIASPORA)))
 292                 return $gcid;
 293
 294         logger("profile-check generation: ".$generation." Network: ".$network." URL: ".$profile_url." name: ".$name." avatar: ".$profile_photo, LOGGER_DEBUG);
 295
 296         poco_check_server($server_url, $network);
 297
 298         $gcontact = array("url" => $profile_url,
 299                         "addr" => $addr,
 300                         "alias" => $alias,
 301                         "name" => $name,
 302                         "network" => $network,
 303                         "photo" => $profile_photo,
 304                         "about" => $about,
 305                         "location" => $location,
 306                         "gender" => $gender,
 307                         "keywords" => $keywords,
 308                         "server_url" => $server_url,
 309                         "connect" => $connect_url,
 310                         "notify" => $notify,
 311                         "updated" => $updated,
 312                         "generation" => $generation);
 313
 314         $gcid = update_gcontact($gcontact);
 315
 316         if(!$gcid)
 317                 return $gcid;
 318
 319         $r = q("SELECT * FROM `glink` WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d LIMIT 1",
 320                 intval($cid),
 321                 intval($uid),
 322                 intval($gcid),
 323                 intval($zcid)
 324         );
 325         if(! count($r)) {
 326                 q("INSERT INTO `glink` (`cid`,`uid`,`gcid`,`zcid`, `updated`) VALUES (%d,%d,%d,%d, '%s') ",
 327                         intval($cid),
 328                         intval($uid),
 329                         intval($gcid),
 330                         intval($zcid),
 331                         dbesc(datetime_convert())
 332                 );
 333         } else {
 334                 q("UPDATE `glink` SET `updated` = '%s' WHERE `cid` = %d AND `uid` = %d AND `gcid` = %d AND `zcid` = %d",
 335                         dbesc(datetime_convert()),
 336                         intval($cid),
 337                         intval($uid),
 338                         intval($gcid),
 339                         intval($zcid)
 340                 );
 341         }
 342
 343         return $gcid;
 344 }
 345
 346 function poco_reachable($profile, $server = "", $network = "", $force = false) {
 347
 348         if ($server == "")
 349                 $server = poco_detect_server($profile);
 350
 351         if ($server == "")
 352                 return true;
 353
 354         return poco_check_server($server, $network, $force);
 355 }
 356
 357 function poco_detect_server($profile) {
 358
 359         // Try to detect the server path based upon some known standard paths
 360         $server_url = "";
 361
 362         if ($server_url == "") {
 363                 $friendica = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $profile);
 364                 if ($friendica != $profile) {
 365                         $server_url = $friendica;
 366                         $network = NETWORK_DFRN;
 367                 }
 368         }
 369
 370         if ($server_url == "") {
 371                 $diaspora = preg_replace("=(https?://)(.*)/u/(.*)=ism", "$1$2", $profile);
 372                 if ($diaspora != $profile) {
 373                         $server_url = $diaspora;
 374                         $network = NETWORK_DIASPORA;
 375                 }
 376         }
 377
 378         if ($server_url == "") {
 379                 $red = preg_replace("=(https?://)(.*)/channel/(.*)=ism", "$1$2", $profile);
 380                 if ($red != $profile) {
 381                         $server_url = $red;
 382                         $network = NETWORK_DIASPORA;
 383                 }
 384         }
 385
 386         return $server_url;
 387 }
 388
 389 function poco_alternate_ostatus_url($url) {
 390         return(preg_match("=https?://.+/user/\d+=ism", $url, $matches));
 391 }
 392
 393 function poco_last_updated($profile, $force = false) {
 394
 395         $gcontacts = q("SELECT * FROM `gcontact` WHERE `nurl` = '%s'",
 396                         dbesc(normalise_link($profile)));
 397
 398         if ($gcontacts[0]["created"] == "0000-00-00 00:00:00")
 399                 q("UPDATE `gcontact` SET `created` = '%s' WHERE `nurl` = '%s'",
 400                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 401
 402         if ($gcontacts[0]["server_url"] != "")
 403                 $server_url = $gcontacts[0]["server_url"];
 404         else
 405                 $server_url = poco_detect_server($profile);
 406
 407         if (!in_array($gcontacts[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_FEED, NETWORK_OSTATUS, ""))) {
 408                 logger("Profile ".$profile.": Network type ".$gcontacts[0]["network"]." can't be checked", LOGGER_DEBUG);
 409                 return false;
 410         }
 411
 412         if ($server_url != "") {
 413                 if (!poco_check_server($server_url, $gcontacts[0]["network"], $force)) {
 414
 415                         if ($force)
 416                                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 417                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 418
 419                         logger("Profile ".$profile.": Server ".$server_url." wasn't reachable.", LOGGER_DEBUG);
 420                         return false;
 421                 }
 422
 423                 q("UPDATE `gcontact` SET `server_url` = '%s' WHERE `nurl` = '%s'",
 424                         dbesc($server_url), dbesc(normalise_link($profile)));
 425         }
 426
 427         if (in_array($gcontacts[0]["network"], array("", NETWORK_FEED))) {
 428                 $server = q("SELECT `network` FROM `gserver` WHERE `nurl` = '%s' AND `network` != ''",
 429                         dbesc(normalise_link($server_url)));
 430
 431                 if ($server)
 432                         q("UPDATE `gcontact` SET `network` = '%s' WHERE `nurl` = '%s'",
 433                                 dbesc($server[0]["network"]), dbesc(normalise_link($profile)));
 434                 else
 435                         return false;
 436         }
 437
 438         // noscrape is really fast so we don't cache the call.
 439         if (($gcontacts[0]["server_url"] != "") AND ($gcontacts[0]["nick"] != "")) {
 440
 441                 //  Use noscrape if possible
 442                 $server = q("SELECT `noscrape`, `network` FROM `gserver` WHERE `nurl` = '%s' AND `noscrape` != ''", dbesc(normalise_link($gcontacts[0]["server_url"])));
 443
 444                 if ($server) {
 445                         $noscraperet = z_fetch_url($server[0]["noscrape"]."/".$gcontacts[0]["nick"]);
 446
 447                          if ($noscraperet["success"] AND ($noscraperet["body"] != "")) {
 448
 449                                 $noscrape = json_decode($noscraperet["body"], true);
 450
 451                                 if (is_array($noscrape)) {
 452                                         $contact = array("url" => $profile,
 453                                                         "network" => $server[0]["network"],
 454                                                         "generation" => $gcontacts[0]["generation"]);
 455
 456                                         if (isset($noscrape["fn"]))
 457                                                 $contact["name"] = $noscrape["fn"];
 458
 459                                         if (isset($noscrape["comm"]))
 460                                                 $contact["community"] = $noscrape["comm"];
 461
 462                                         if (isset($noscrape["tags"])) {
 463                                                 $keywords = implode(" ", $noscrape["tags"]);
 464                                                 if ($keywords != "")
 465                                                         $contact["keywords"] = $keywords;
 466                                         }
 467
 468                                         $location = formatted_location($noscrape);
 469                                         if ($location)
 470                                                 $contact["location"] = $location;
 471
 472                                         if (isset($noscrape["dfrn-notify"]))
 473                                                 $contact["notify"] = $noscrape["dfrn-notify"];
 474
 475                                         // Remove all fields that are not present in the gcontact table
 476                                         unset($noscrape["fn"]);
 477                                         unset($noscrape["key"]);
 478                                         unset($noscrape["homepage"]);
 479                                         unset($noscrape["comm"]);
 480                                         unset($noscrape["tags"]);
 481                                         unset($noscrape["locality"]);
 482                                         unset($noscrape["region"]);
 483                                         unset($noscrape["country-name"]);
 484                                         unset($noscrape["contacts"]);
 485                                         unset($noscrape["dfrn-request"]);
 486                                         unset($noscrape["dfrn-confirm"]);
 487                                         unset($noscrape["dfrn-notify"]);
 488                                         unset($noscrape["dfrn-poll"]);
 489
 490                                         // Set the date of the last contact
 491                                         /// @todo By now the function "update_gcontact" doesn't work with this field
 492                                         //$contact["last_contact"] = datetime_convert();
 493
 494                                         $contact = array_merge($contact, $noscrape);
 495
 496                                         update_gcontact($contact);
 497
 498                                         if (trim($noscrape["updated"]) != "") {
 499                                                 q("UPDATE `gcontact` SET `last_contact` = '%s' WHERE `nurl` = '%s'",
 500                                                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 501
 502                                                 logger("Profile ".$profile." was last updated at ".$noscrape["updated"]." (noscrape)", LOGGER_DEBUG);
 503
 504                                                 return $noscrape["updated"];
 505                                         }
 506                                 }
 507                         }
 508                 }
 509         }
 510
 511         // If we only can poll the feed, then we only do this once a while
 512         if (!$force AND !poco_do_update($gcontacts[0]["created"], $gcontacts[0]["updated"], $gcontacts[0]["last_failure"],  $gcontacts[0]["last_contact"])) {
 513                 logger("Profile ".$profile." was last updated at ".$gcontacts[0]["updated"]." (cached)", LOGGER_DEBUG);
 514                 return $gcontacts[0]["updated"];
 515         }
 516
 517         $data = probe_url($profile);
 518
 519         // Is the profile link the alternate OStatus link notation? (http://domain.tld/user/4711)
 520         // Then check the other link and delete this one
 521         if (($data["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($profile) AND
 522                 (normalise_link($profile) == normalise_link($data["alias"])) AND
 523                 (normalise_link($profile) != normalise_link($data["url"]))) {
 524
 525                 // Delete the old entry
 526                 q("DELETE FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($profile)));
 527                 q("DELETE FROM `glink` WHERE `gcid` = %d", intval($gcontacts[0]["id"]));
 528
 529                 poco_check($data["url"], $data["name"], $data["network"], $data["photo"], $gcontacts[0]["about"], $gcontacts[0]["location"],
 530                                 $gcontacts[0]["gender"], $gcontacts[0]["keywords"], $data["addr"], $gcontacts[0]["updated"], $gcontacts[0]["generation"]);
 531
 532                 poco_last_updated($data["url"], $force);
 533
 534                 logger("Profile ".$profile." was deleted", LOGGER_DEBUG);
 535                 return false;
 536         }
 537
 538         if (($data["poll"] == "") OR (in_array($data["network"], array(NETWORK_FEED, NETWORK_PHANTOM)))) {
 539                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 540                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 541
 542                 logger("Profile ".$profile." wasn't reachable (profile)", LOGGER_DEBUG);
 543                 return false;
 544         }
 545
 546         $contact = array("generation" => $gcontacts[0]["generation"]);
 547
 548         $contact = array_merge($contact, $data);
 549
 550         $contact["server_url"] = $data["baseurl"];
 551
 552         unset($contact["batch"]);
 553         unset($contact["poll"]);
 554         unset($contact["request"]);
 555         unset($contact["confirm"]);
 556         unset($contact["poco"]);
 557         unset($contact["priority"]);
 558         unset($contact["pubkey"]);
 559         unset($contact["baseurl"]);
 560
 561         update_gcontact($contact);
 562
 563         $feedret = z_fetch_url($data["poll"]);
 564
 565         if (!$feedret["success"]) {
 566                 q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
 567                         dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 568
 569                 logger("Profile ".$profile." wasn't reachable (no feed)", LOGGER_DEBUG);
 570                 return false;
 571         }
 572
 573         $doc = new DOMDocument();
 574         @$doc->loadXML($feedret["body"]);
 575
 576         $xpath = new DomXPath($doc);
 577         $xpath->registerNamespace('atom', "http://www.w3.org/2005/Atom");
 578
 579         $entries = $xpath->query('/atom:feed/atom:entry');
 580
 581         $last_updated = "";
 582
 583         foreach ($entries AS $entry) {
 584                 $published = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
 585                 $updated = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
 586
 587                 if ($last_updated < $published)
 588                         $last_updated = $published;
 589
 590                 if ($last_updated < $updated)
 591                         $last_updated = $updated;
 592         }
 593
 594         // Maybe there aren't any entries. Then check if it is a valid feed
 595         if ($last_updated == "")
 596                 if ($xpath->query('/atom:feed')->length > 0)
 597                         $last_updated = "0000-00-00 00:00:00";
 598
 599         q("UPDATE `gcontact` SET `updated` = '%s', `last_contact` = '%s' WHERE `nurl` = '%s'",
 600                 dbesc($last_updated), dbesc(datetime_convert()), dbesc(normalise_link($profile)));
 601
 602         if (($gcontacts[0]["generation"] == 0))
 603                 q("UPDATE `gcontact` SET `generation` = 9 WHERE `nurl` = '%s'",
 604                         dbesc(normalise_link($profile)));
 605
 606         logger("Profile ".$profile." was last updated at ".$last_updated, LOGGER_DEBUG);
 607
 608         return($last_updated);
 609 }
 610
 611 function poco_do_update($created, $updated, $last_failure,  $last_contact) {
 612         $now = strtotime(datetime_convert());
 613
 614         if ($updated > $last_contact)
 615                 $contact_time = strtotime($updated);
 616         else
 617                 $contact_time = strtotime($last_contact);
 618
 619         $failure_time = strtotime($last_failure);
 620         $created_time = strtotime($created);
 621
 622         // If there is no "created" time then use the current time
 623         if ($created_time <= 0)
 624                 $created_time = $now;
 625
 626         // If the last contact was less than 24 hours then don't update
 627         if (($now - $contact_time) < (60 * 60 * 24))
 628                 return false;
 629
 630         // If the last failure was less than 24 hours then don't update
 631         if (($now - $failure_time) < (60 * 60 * 24))
 632                 return false;
 633
 634         // If the last contact was less than a week ago and the last failure is older than a week then don't update
 635         //if ((($now - $contact_time) < (60 * 60 * 24 * 7)) AND ($contact_time > $failure_time))
 636         //      return false;
 637
 638         // If the last contact time was more than a week ago and the contact was created more than a week ago, then only try once a week
 639         if ((($now - $contact_time) > (60 * 60 * 24 * 7)) AND (($now - $created_time) > (60 * 60 * 24 * 7)) AND (($now - $failure_time) < (60 * 60 * 24 * 7)))
 640                 return false;
 641
 642         // If the last contact time was more than a month ago and the contact was created more than a month ago, then only try once a month
 643         if ((($now - $contact_time) > (60 * 60 * 24 * 30)) AND (($now - $created_time) > (60 * 60 * 24 * 30)) AND (($now - $failure_time) < (60 * 60 * 24 * 30)))
 644                 return false;
 645
 646         return true;
 647 }
 648
 649 function poco_to_boolean($val) {
 650         if (($val == "true") OR ($val == 1))
 651                 return(true);
 652         if (($val == "false") OR ($val == 0))
 653                 return(false);
 654
 655         return ($val);
 656 }
 657
 658 function poco_check_server($server_url, $network = "", $force = false) {
 659
 660         // Unify the server address
 661         $server_url = trim($server_url, "/");
 662         $server_url = str_replace("/index.php", "", $server_url);
 663
 664         if ($server_url == "")
 665                 return false;
 666
 667         $servers = q("SELECT * FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
 668         if ($servers) {
 669
 670                 if ($servers[0]["created"] == "0000-00-00 00:00:00")
 671                         q("UPDATE `gserver` SET `created` = '%s' WHERE `nurl` = '%s'",
 672                                 dbesc(datetime_convert()), dbesc(normalise_link($server_url)));
 673
 674                 $poco = $servers[0]["poco"];
 675                 $noscrape = $servers[0]["noscrape"];
 676
 677                 if ($network == "")
 678                         $network = $servers[0]["network"];
 679
 680                 $last_contact = $servers[0]["last_contact"];
 681                 $last_failure = $servers[0]["last_failure"];
 682                 $version = $servers[0]["version"];
 683                 $platform = $servers[0]["platform"];
 684                 $site_name = $servers[0]["site_name"];
 685                 $info = $servers[0]["info"];
 686                 $register_policy = $servers[0]["register_policy"];
 687
 688                 if (!$force AND !poco_do_update($servers[0]["created"], "", $last_failure, $last_contact)) {
 689                         logger("Use cached data for server ".$server_url, LOGGER_DEBUG);
 690                         return ($last_contact >= $last_failure);
 691                 }
 692         } else {
 693                 $poco = "";
 694                 $noscrape = "";
 695                 $version = "";
 696                 $platform = "";
 697                 $site_name = "";
 698                 $info = "";
 699                 $register_policy = -1;
 700
 701                 $last_contact = "0000-00-00 00:00:00";
 702                 $last_failure = "0000-00-00 00:00:00";
 703         }
 704         logger("Server ".$server_url." is outdated or unknown. Start discovery. Force: ".$force." Created: ".$servers[0]["created"]." Failure: ".$last_failure." Contact: ".$last_contact, LOGGER_DEBUG);
 705
 706         $failure = false;
 707         $orig_last_failure = $last_failure;
 708
 709         // Check if the page is accessible via SSL.
 710         $server_url = str_replace("http://", "https://", $server_url);
 711         $serverret = z_fetch_url($server_url."/.well-known/host-meta");
 712
 713         // Maybe the page is unencrypted only?
 714         $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
 715         if (!$serverret["success"] OR ($serverret["body"] == "") OR (@sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
 716                 $server_url = str_replace("https://", "http://", $server_url);
 717                 $serverret = z_fetch_url($server_url."/.well-known/host-meta");
 718
 719                 $xmlobj = @simplexml_load_string($serverret["body"],'SimpleXMLElement',0, "http://docs.oasis-open.org/ns/xri/xrd-1.0");
 720         }
 721
 722         if (!$serverret["success"] OR ($serverret["body"] == "") OR (sizeof($xmlobj) == 0) OR !is_object($xmlobj)) {
 723                 // Workaround for bad configured servers (known nginx problem)
 724                 if ($serverret["debug"]["http_code"] != "403") {
 725                         $last_failure = datetime_convert();
 726                         $failure = true;
 727                 }
 728         } elseif ($network == NETWORK_DIASPORA)
 729                 $last_contact = datetime_convert();
 730
 731         if (!$failure) {
 732                 // Test for Diaspora
 733                 $serverret = z_fetch_url($server_url);
 734
 735                 if (!$serverret["success"] OR ($serverret["body"] == ""))
 736                         $failure = true;
 737                 else {
 738                         $lines = explode("\n",$serverret["header"]);
 739                         if(count($lines))
 740                                 foreach($lines as $line) {
 741                                         $line = trim($line);
 742                                         if(stristr($line,'X-Diaspora-Version:')) {
 743                                                 $platform = "Diaspora";
 744                                                 $version = trim(str_replace("X-Diaspora-Version:", "", $line));
 745                                                 $version = trim(str_replace("x-diaspora-version:", "", $version));
 746                                                 $network = NETWORK_DIASPORA;
 747                                                 $versionparts = explode("-", $version);
 748                                                 $version = $versionparts[0];
 749                                         }
 750                                 }
 751                 }
 752         }
 753
 754         if (!$failure) {
 755                 // Test for Statusnet
 756                 // Will also return data for Friendica and GNU Social - but it will be overwritten later
 757                 // The "not implemented" is a special treatment for really, really old Friendica versions
 758                 $serverret = z_fetch_url($server_url."/api/statusnet/version.json");
 759                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
 760                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
 761                         $platform = "StatusNet";
 762                         $version = trim($serverret["body"], '"');
 763                         $network = NETWORK_OSTATUS;
 764                 }
 765
 766                 // Test for GNU Social
 767                 $serverret = z_fetch_url($server_url."/api/gnusocial/version.json");
 768                 if ($serverret["success"] AND ($serverret["body"] != '{"error":"not implemented"}') AND
 769                         ($serverret["body"] != '') AND (strlen($serverret["body"]) < 30)) {
 770                         $platform = "GNU Social";
 771                         $version = trim($serverret["body"], '"');
 772                         $network = NETWORK_OSTATUS;
 773                 }
 774
 775                 $serverret = z_fetch_url($server_url."/api/statusnet/config.json");
 776                 if ($serverret["success"]) {
 777                         $data = json_decode($serverret["body"]);
 778
 779                         if (isset($data->site->server)) {
 780                                 $last_contact = datetime_convert();
 781
 782                                 if (isset($data->site->hubzilla)) {
 783                                         $platform = $data->site->hubzilla->PLATFORM_NAME;
 784                                         $version = $data->site->hubzilla->RED_VERSION;
 785                                         $network = NETWORK_DIASPORA;
 786                                 }
 787                                 if (isset($data->site->redmatrix)) {
 788                                         if (isset($data->site->redmatrix->PLATFORM_NAME))
 789                                                 $platform = $data->site->redmatrix->PLATFORM_NAME;
 790                                         elseif (isset($data->site->redmatrix->RED_PLATFORM))
 791                                                 $platform = $data->site->redmatrix->RED_PLATFORM;
 792
 793                                         $version = $data->site->redmatrix->RED_VERSION;
 794                                         $network = NETWORK_DIASPORA;
 795                                 }
 796                                 if (isset($data->site->friendica)) {
 797                                         $platform = $data->site->friendica->FRIENDICA_PLATFORM;
 798                                         $version = $data->site->friendica->FRIENDICA_VERSION;
 799                                         $network = NETWORK_DFRN;
 800                                 }
 801
 802                                 $site_name = $data->site->name;
 803
 804                                 $data->site->closed = poco_to_boolean($data->site->closed);
 805                                 $data->site->private = poco_to_boolean($data->site->private);
 806                                 $data->site->inviteonly = poco_to_boolean($data->site->inviteonly);
 807
 808                                 if (!$data->site->closed AND !$data->site->private and $data->site->inviteonly)
 809                                         $register_policy = REGISTER_APPROVE;
 810                                 elseif (!$data->site->closed AND !$data->site->private)
 811                                         $register_policy = REGISTER_OPEN;
 812                                 else
 813                                         $register_policy = REGISTER_CLOSED;
 814                         }
 815                 }
 816         }
 817
 818         // Query statistics.json. Optional package for Diaspora, Friendica and Redmatrix
 819         if (!$failure) {
 820                 $serverret = z_fetch_url($server_url."/statistics.json");
 821                 if ($serverret["success"]) {
 822                         $data = json_decode($serverret["body"]);
 823                         if ($version == "")
 824                                 $version = $data->version;
 825
 826                         $site_name = $data->name;
 827
 828                         if (isset($data->network) AND ($platform == ""))
 829                                 $platform = $data->network;
 830
 831                         if ($platform == "Diaspora")
 832                                 $network = NETWORK_DIASPORA;
 833
 834                         if ($data->registrations_open)
 835                                 $register_policy = REGISTER_OPEN;
 836                         else
 837                                 $register_policy = REGISTER_CLOSED;
 838
 839                         if (isset($data->version))
 840                                 $last_contact = datetime_convert();
 841                 }
 842         }
 843
 844         // Check for noscrape
 845         // Friendica servers could be detected as OStatus servers
 846         if (!$failure AND in_array($network, array(NETWORK_DFRN, NETWORK_OSTATUS))) {
 847                 $serverret = z_fetch_url($server_url."/friendica/json");
 848
 849                 if (!$serverret["success"])
 850                         $serverret = z_fetch_url($server_url."/friendika/json");
 851
 852                 if ($serverret["success"]) {
 853                         $data = json_decode($serverret["body"]);
 854
 855                         if (isset($data->version)) {
 856                                 $last_contact = datetime_convert();
 857                                 $network = NETWORK_DFRN;
 858
 859                                 $noscrape = $data->no_scrape_url;
 860                                 $version = $data->version;
 861                                 $site_name = $data->site_name;
 862                                 $info = $data->info;
 863                                 $register_policy_str = $data->register_policy;
 864                                 $platform = $data->platform;
 865
 866                                 switch ($register_policy_str) {
 867                                         case "REGISTER_CLOSED":
 868                                                 $register_policy = REGISTER_CLOSED;
 869                                                 break;
 870                                         case "REGISTER_APPROVE":
 871                                                 $register_policy = REGISTER_APPROVE;
 872                                                 break;
 873                                         case "REGISTER_OPEN":
 874                                                 $register_policy = REGISTER_OPEN;
 875                                                 break;
 876                                 }
 877                         }
 878                 }
 879         }
 880
 881         // Look for poco
 882         if (!$failure) {
 883                 $serverret = z_fetch_url($server_url."/poco");
 884                 if ($serverret["success"]) {
 885                         $data = json_decode($serverret["body"]);
 886                         if (isset($data->totalResults)) {
 887                                 $poco = $server_url."/poco";
 888                                 $last_contact = datetime_convert();
 889                         }
 890                 }
 891         }
 892
 893         // Check again if the server exists
 894         $servers = q("SELECT `nurl` FROM `gserver` WHERE `nurl` = '%s'", dbesc(normalise_link($server_url)));
 895
 896         $version = strip_tags($version);
 897         $site_name = strip_tags($site_name);
 898         $info = strip_tags($info);
 899         $platform = strip_tags($platform);
 900
 901         if ($servers)
 902                  q("UPDATE `gserver` SET `url` = '%s', `version` = '%s', `site_name` = '%s', `info` = '%s', `register_policy` = %d, `poco` = '%s', `noscrape` = '%s',
 903                         `network` = '%s', `platform` = '%s', `last_contact` = '%s', `last_failure` = '%s' WHERE `nurl` = '%s'",
 904                         dbesc($server_url),
 905                         dbesc($version),
 906                         dbesc($site_name),
 907                         dbesc($info),
 908                         intval($register_policy),
 909                         dbesc($poco),
 910                         dbesc($noscrape),
 911                         dbesc($network),
 912                         dbesc($platform),
 913                         dbesc($last_contact),
 914                         dbesc($last_failure),
 915                         dbesc(normalise_link($server_url))
 916                 );
 917         else
 918                 q("INSERT INTO `gserver` (`url`, `nurl`, `version`, `site_name`, `info`, `register_policy`, `poco`, `noscrape`, `network`, `platform`, `created`, `last_contact`, `last_failure`)
 919                                         VALUES ('%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s')",
 920                                 dbesc($server_url),
 921                                 dbesc(normalise_link($server_url)),
 922                                 dbesc($version),
 923                                 dbesc($site_name),
 924                                 dbesc($info),
 925                                 intval($register_policy),
 926                                 dbesc($poco),
 927                                 dbesc($noscrape),
 928                                 dbesc($network),
 929                                 dbesc($platform),
 930                                 dbesc(datetime_convert()),
 931                                 dbesc($last_contact),
 932                                 dbesc($last_failure),
 933                                 dbesc(datetime_convert())
 934                 );
 935
 936         logger("End discovery for server ".$server_url, LOGGER_DEBUG);
 937
 938         return !$failure;
 939 }
 940
 941 function count_common_friends($uid,$cid) {
 942
 943         $r = q("SELECT count(*) as `total`
 944                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 945                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
 946                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
 947                 AND `gcontact`.`nurl` IN (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 and id != %d ) ",
 948                 intval($cid),
 949                 intval($uid),
 950                 intval($uid),
 951                 intval($cid)
 952         );
 953
 954 //      logger("count_common_friends: $uid $cid {$r[0]['total']}");
 955         if(count($r))
 956                 return $r[0]['total'];
 957         return 0;
 958
 959 }
 960
 961
 962 function common_friends($uid,$cid,$start = 0,$limit=9999,$shuffle = false) {
 963
 964         if($shuffle)
 965                 $sql_extra = " order by rand() ";
 966         else
 967                 $sql_extra = " order by `gcontact`.`name` asc ";
 968
 969         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
 970                 FROM `glink`
 971                 INNER JOIN `gcontact` ON `glink`.`gcid` = `gcontact`.`id`
 972                 INNER JOIN `contact` ON `gcontact`.`nurl` = `contact`.`nurl`
 973                 WHERE `glink`.`cid` = %d and `glink`.`uid` = %d
 974                         AND `contact`.`uid` = %d AND `contact`.`self` = 0 AND `contact`.`blocked` = 0
 975                         AND `contact`.`hidden` = 0 AND `contact`.`id` != %d
 976                         AND ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
 977                         $sql_extra LIMIT %d, %d",
 978                 intval($cid),
 979                 intval($uid),
 980                 intval($uid),
 981                 intval($cid),
 982                 intval($start),
 983                 intval($limit)
 984         );
 985
 986         return $r;
 987
 988 }
 989
 990
 991 function count_common_friends_zcid($uid,$zcid) {
 992
 993         $r = q("SELECT count(*) as `total`
 994                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 995                 where `glink`.`zcid` = %d
 996                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 ) ",
 997                 intval($zcid),
 998                 intval($uid)
 999         );
1000
1001         if(count($r))
1002                 return $r[0]['total'];
1003         return 0;
1004
1005 }
1006
1007 function common_friends_zcid($uid,$zcid,$start = 0, $limit = 9999,$shuffle = false) {
1008
1009         if($shuffle)
1010                 $sql_extra = " order by rand() ";
1011         else
1012                 $sql_extra = " order by `gcontact`.`name` asc ";
1013
1014         $r = q("SELECT `gcontact`.*
1015                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1016                 where `glink`.`zcid` = %d
1017                 and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 )
1018                 $sql_extra limit %d, %d",
1019                 intval($zcid),
1020                 intval($uid),
1021                 intval($start),
1022                 intval($limit)
1023         );
1024
1025         return $r;
1026
1027 }
1028
1029
1030 function count_all_friends($uid,$cid) {
1031
1032         $r = q("SELECT count(*) as `total`
1033                 FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1034                 where `glink`.`cid` = %d and `glink`.`uid` = %d AND
1035                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))",
1036                 intval($cid),
1037                 intval($uid)
1038         );
1039
1040         if(count($r))
1041                 return $r[0]['total'];
1042         return 0;
1043
1044 }
1045
1046
1047 function all_friends($uid,$cid,$start = 0, $limit = 80) {
1048
1049         $r = q("SELECT `gcontact`.*, `contact`.`id` AS `cid`
1050                 FROM `glink`
1051                 INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
1052                 LEFT JOIN `contact` ON `contact`.`nurl` = `gcontact`.`nurl` AND `contact`.`uid` = %d
1053                 WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
1054                 ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
1055                 ORDER BY `gcontact`.`name` ASC LIMIT %d, %d ",
1056                 intval($uid),
1057                 intval($cid),
1058                 intval($uid),
1059                 intval($start),
1060                 intval($limit)
1061         );
1062
1063         return $r;
1064 }
1065
1066
1067
1068 function suggestion_query($uid, $start = 0, $limit = 80) {
1069
1070         if(! $uid)
1071                 return array();
1072
1073         $network = array(NETWORK_DFRN);
1074
1075         if (get_config('system','diaspora_enabled'))
1076                 $network[] = NETWORK_DIASPORA;
1077
1078         if (!get_config('system','ostatus_disabled'))
1079                 $network[] = NETWORK_OSTATUS;
1080
1081         $sql_network = implode("', '", $network);
1082         //$sql_network = "'".$sql_network."', ''";
1083         $sql_network = "'".$sql_network."'";
1084
1085         $r = q("SELECT count(glink.gcid) as `total`, gcontact.* from gcontact
1086                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1087                 where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
1088                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1089                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1090                 AND `gcontact`.`updated` != '0000-00-00 00:00:00'
1091                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1092                 AND `gcontact`.`network` IN (%s)
1093                 GROUP BY `glink`.`gcid` ORDER BY `gcontact`.`updated` DESC,`total` DESC LIMIT %d, %d",
1094                 intval($uid),
1095                 intval($uid),
1096                 intval($uid),
1097                 intval($uid),
1098                 $sql_network,
1099                 intval($start),
1100                 intval($limit)
1101         );
1102
1103         if(count($r) && count($r) >= ($limit -1))
1104                 return $r;
1105
1106         $r2 = q("SELECT gcontact.* FROM gcontact
1107                 INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
1108                 WHERE `glink`.`uid` = 0 AND `glink`.`cid` = 0 AND `glink`.`zcid` = 0 AND NOT `gcontact`.`nurl` IN (SELECT `nurl` FROM `contact` WHERE `uid` = %d)
1109                 AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
1110                 AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
1111                 AND `gcontact`.`updated` != '0000-00-00 00:00:00'
1112                 AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
1113                 AND `gcontact`.`network` IN (%s)
1114                 ORDER BY rand() LIMIT %d, %d",
1115                 intval($uid),
1116                 intval($uid),
1117                 intval($uid),
1118                 $sql_network,
1119                 intval($start),
1120                 intval($limit)
1121         );
1122
1123         $list = array();
1124         foreach ($r2 AS $suggestion)
1125                 $list[$suggestion["nurl"]] = $suggestion;
1126
1127         foreach ($r AS $suggestion)
1128                 $list[$suggestion["nurl"]] = $suggestion;
1129
1130         while (sizeof($list) > ($limit))
1131                 array_pop($list);
1132
1133         return $list;
1134 }
1135
1136 function update_suggestions() {
1137
1138         $a = get_app();
1139
1140         $done = array();
1141
1142         /// TODO Check if it is really neccessary to poll the own server
1143         poco_load(0,0,0,$a->get_baseurl() . '/poco');
1144
1145         $done[] = $a->get_baseurl() . '/poco';
1146
1147         if(strlen(get_config('system','directory'))) {
1148                 $x = fetch_url(get_server()."/pubsites");
1149                 if($x) {
1150                         $j = json_decode($x);
1151                         if($j->entries) {
1152                                 foreach($j->entries as $entry) {
1153
1154                                         poco_check_server($entry->url);
1155
1156                                         $url = $entry->url . '/poco';
1157                                         if(! in_array($url,$done))
1158                                                 poco_load(0,0,0,$entry->url . '/poco');
1159                                 }
1160                         }
1161                 }
1162         }
1163
1164         // Query your contacts from Friendica and Redmatrix/Hubzilla for their contacts
1165         $r = q("SELECT DISTINCT(`poco`) AS `poco` FROM `contact` WHERE `network` IN ('%s', '%s')",
1166                 dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA)
1167         );
1168
1169         if(count($r)) {
1170                 foreach($r as $rr) {
1171                         $base = substr($rr['poco'],0,strrpos($rr['poco'],'/'));
1172                         if(! in_array($base,$done))
1173                                 poco_load(0,0,0,$base);
1174                 }
1175         }
1176 }
1177
1178 function poco_discover_federation() {
1179         $last = get_config('poco','last_federation_discovery');
1180
1181         if($last) {
1182                 $next = $last + (24 * 60 * 60);
1183                 if($next > time())
1184                         return;
1185         }
1186
1187         // Discover Friendica, Hubzilla and Diaspora servers
1188         $serverdata = fetch_url("http://the-federation.info/pods.json");
1189
1190         if ($serverdata) {
1191                 $servers = json_decode($serverdata);
1192
1193                 foreach($servers->pods AS $server)
1194                         poco_check_server("https://".$server->host);
1195         }
1196
1197         // Discover GNU Social Servers
1198         if (!get_config('system','ostatus_disabled')) {
1199                 $serverdata = "http://gstools.org/api/get_open_instances/";
1200
1201                 $result = z_fetch_url($serverdata);
1202                 if ($result["success"]) {
1203                         $servers = json_decode($result["body"]);
1204
1205                         foreach($servers->data AS $server)
1206                                 poco_check_server($server->instance_address);
1207                 }
1208         }
1209
1210         set_config('poco','last_federation_discovery', time());
1211 }
1212
1213 function poco_discover($complete = false) {
1214
1215         // Update the server list
1216         poco_discover_federation();
1217
1218         $no_of_queries = 5;
1219
1220         $requery_days = intval(get_config("system", "poco_requery_days"));
1221
1222         if ($requery_days == 0)
1223                 $requery_days = 7;
1224
1225         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1226
1227         $r = q("SELECT `poco`, `nurl`, `url`, `network` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `poco` != '' AND `last_poco_query` < '%s' ORDER BY RAND()", dbesc($last_update));
1228         if ($r)
1229                 foreach ($r AS $server) {
1230
1231                         if (!poco_check_server($server["url"], $server["network"])) {
1232                                 // The server is not reachable? Okay, then we will try it later
1233                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1234                                 continue;
1235                         }
1236
1237                         // Fetch all users from the other server
1238                         $url = $server["poco"]."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,generation";
1239
1240                         logger("Fetch all users from the server ".$server["nurl"], LOGGER_DEBUG);
1241
1242                         $retdata = z_fetch_url($url);
1243                         if ($retdata["success"]) {
1244                                 $data = json_decode($retdata["body"]);
1245
1246                                 poco_discover_server($data, 2);
1247
1248                                 if (get_config('system','poco_discovery') > 1) {
1249
1250                                         $timeframe = get_config('system','poco_discovery_since');
1251                                         if ($timeframe == 0)
1252                                                 $timeframe = 30;
1253
1254                                         $updatedSince = date("Y-m-d H:i:s", time() - $timeframe * 86400);
1255
1256                                         // Fetch all global contacts from the other server (Not working with Redmatrix and Friendica versions before 3.3)
1257                                         $url = $server["poco"]."/@global?updatedSince=".$updatedSince."&fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,generation";
1258
1259                                         $success = false;
1260
1261                                         $retdata = z_fetch_url($url);
1262                                         if ($retdata["success"]) {
1263                                                 logger("Fetch all global contacts from the server ".$server["nurl"], LOGGER_DEBUG);
1264                                                 $success = poco_discover_server(json_decode($retdata["body"]));
1265                                         }
1266
1267                                         if (!$success AND (get_config('system','poco_discovery') > 2)) {
1268                                                 logger("Fetch contacts from users of the server ".$server["nurl"], LOGGER_DEBUG);
1269                                                 poco_discover_server_users($data, $server);
1270                                         }
1271                                 }
1272
1273                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1274                                 if (!$complete AND (--$no_of_queries == 0))
1275                                         break;
1276                         } else {
1277                                 // If the server hadn't replied correctly, then force a sanity check
1278                                 poco_check_server($server["url"], $server["network"], true);
1279
1280                                 // If we couldn't reach the server, we will try it some time later
1281                                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1282                         }
1283                 }
1284 }
1285
1286 function poco_discover_server_users($data, $server) {
1287
1288         if (!isset($data->entry))
1289                 return;
1290
1291         foreach ($data->entry AS $entry) {
1292                 $username = "";
1293                 if (isset($entry->urls)) {
1294                         foreach($entry->urls as $url)
1295                                 if($url->type == 'profile') {
1296                                         $profile_url = $url->value;
1297                                         $urlparts = parse_url($profile_url);
1298                                         $username = end(explode("/", $urlparts["path"]));
1299                                 }
1300                 }
1301                 if ($username != "") {
1302                         logger("Fetch contacts for the user ".$username." from the server ".$server["nurl"], LOGGER_DEBUG);
1303
1304                         // Fetch all contacts from a given user from the other server
1305                         $url = $server["poco"]."/".$username."/?fields=displayName,urls,photos,updated,network,aboutMe,currentLocation,tags,gender,generation";
1306
1307                         $retdata = z_fetch_url($url);
1308                         if ($retdata["success"])
1309                                 poco_discover_server(json_decode($retdata["body"]), 3);
1310                 }
1311         }
1312 }
1313
1314 function poco_discover_server($data, $default_generation = 0) {
1315
1316         if (!isset($data->entry) OR !count($data->entry))
1317                 return false;
1318
1319         $success = false;
1320
1321         foreach ($data->entry AS $entry) {
1322                 $profile_url = '';
1323                 $profile_photo = '';
1324                 $connect_url = '';
1325                 $name = '';
1326                 $network = '';
1327                 $updated = '0000-00-00 00:00:00';
1328                 $location = '';
1329                 $about = '';
1330                 $keywords = '';
1331                 $gender = '';
1332                 $generation = $default_generation;
1333
1334                 $name = $entry->displayName;
1335
1336                 if(isset($entry->urls)) {
1337                         foreach($entry->urls as $url) {
1338                                 if($url->type == 'profile') {
1339                                         $profile_url = $url->value;
1340                                         continue;
1341                                 }
1342                                 if($url->type == 'webfinger') {
1343                                         $connect_url = str_replace('acct:' , '', $url->value);
1344                                         continue;
1345                                 }
1346                         }
1347                 }
1348
1349                 if(isset($entry->photos)) {
1350                         foreach($entry->photos as $photo) {
1351                                 if($photo->type == 'profile') {
1352                                         $profile_photo = $photo->value;
1353                                         continue;
1354                                 }
1355                         }
1356                 }
1357
1358                 if(isset($entry->updated))
1359                         $updated = date("Y-m-d H:i:s", strtotime($entry->updated));
1360
1361                 if(isset($entry->network))
1362                         $network = $entry->network;
1363
1364                 if(isset($entry->currentLocation))
1365                         $location = $entry->currentLocation;
1366
1367                 if(isset($entry->aboutMe))
1368                         $about = html2bbcode($entry->aboutMe);
1369
1370                 if(isset($entry->gender))
1371                         $gender = $entry->gender;
1372
1373                 if(isset($entry->generation) AND ($entry->generation > 0))
1374                         $generation = ++$entry->generation;
1375
1376                 if(isset($entry->tags))
1377                         foreach($entry->tags as $tag)
1378                                 $keywords = implode(", ", $tag);
1379
1380                 if ($generation > 0) {
1381                         $success = true;
1382
1383                         logger("Store profile ".$profile_url, LOGGER_DEBUG);
1384                         poco_check($profile_url, $name, $network, $profile_photo, $about, $location, $gender, $keywords, $connect_url, $updated, $generation, 0, 0, 0);
1385                         logger("Done for profile ".$profile_url, LOGGER_DEBUG);
1386                 }
1387         }
1388         return $success;
1389 }
1390
1391 /**
1392  * @brief Removes unwanted parts from a contact url
1393  *
1394  * @param string $url Contact url
1395  * @return string Contact url with the wanted parts
1396  */
1397 function clean_contact_url($url) {
1398         $parts = parse_url($url);
1399
1400         if (!isset($parts["scheme"]) OR !isset($parts["host"]))
1401                 return $url;
1402
1403         $new_url = $parts["scheme"]."://".$parts["host"];
1404
1405         if (isset($parts["port"]))
1406                 $new_url .= ":".$parts["port"];
1407
1408         if (isset($parts["path"]))
1409                 $new_url .= $parts["path"];
1410
1411         if ($new_url != $url)
1412                 logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".App::callstack(), LOGGER_DEBUG);
1413
1414         return $new_url;
1415 }
1416
1417 /**
1418  * @brief Replace alternate OStatus user format with the primary one
1419  *
1420  * @param arr $contact contact array (called by reference)
1421  */
1422 function fix_alternate_contact_address(&$contact) {
1423         if (($contact["network"] == NETWORK_OSTATUS) AND poco_alternate_ostatus_url($contact["url"])) {
1424                 $data = probe_url($contact["url"]);
1425                 if ($contact["network"] == NETWORK_OSTATUS) {
1426                         logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1427                         $contact["url"] = $data["url"];
1428                         $contact["addr"] = $data["addr"];
1429                         $contact["alias"] = $data["alias"];
1430                         $contact["server_url"] = $data["baseurl"];
1431                 }
1432         }
1433 }
1434
1435 /**
1436  * @brief Fetch the gcontact id, add an entry if not existed
1437  *
1438  * @param arr $contact contact array
1439  * @return bool|int Returns false if not found, integer if contact was found
1440  */
1441 function get_gcontact_id($contact) {
1442
1443         $gcontact_id = 0;
1444         $doprobing = false;
1445
1446         if (in_array($contact["network"], array(NETWORK_PHANTOM))) {
1447                 logger("Invalid network for contact url ".$contact["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1448                 return false;
1449         }
1450
1451         if ($contact["network"] == NETWORK_STATUSNET)
1452                 $contact["network"] = NETWORK_OSTATUS;
1453
1454         // All new contacts are hidden by default
1455         if (!isset($contact["hide"]))
1456                 $contact["hide"] = true;
1457
1458         // Replace alternate OStatus user format with the primary one
1459         fix_alternate_contact_address($contact);
1460
1461         // Remove unwanted parts from the contact url (e.g. "?zrl=...")
1462         if (in_array($contact["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)))
1463                 $contact["url"] = clean_contact_url($contact["url"]);
1464
1465         $r = q("SELECT `id`, `last_contact`, `last_failure`, `network` FROM `gcontact` WHERE `nurl` = '%s' ORDER BY `id` LIMIT 2",
1466                 dbesc(normalise_link($contact["url"])));
1467
1468         if ($r) {
1469                 $gcontact_id = $r[0]["id"];
1470
1471                 // Update every 90 days
1472                 if (in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""))) {
1473                         $last_failure_str = $r[0]["last_failure"];
1474                         $last_failure = strtotime($r[0]["last_failure"]);
1475                         $last_contact_str = $r[0]["last_contact"];
1476                         $last_contact = strtotime($r[0]["last_contact"]);
1477                         $doprobing = (((time() - $last_contact) > (90 * 86400)) AND ((time() - $last_failure) > (90 * 86400)));
1478                 }
1479         } else {
1480                 q("INSERT INTO `gcontact` (`name`, `nick`, `addr` , `network`, `url`, `nurl`, `photo`, `created`, `updated`, `location`, `about`, `hide`, `generation`)
1481                         VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d)",
1482                         dbesc($contact["name"]),
1483                         dbesc($contact["nick"]),
1484                         dbesc($contact["addr"]),
1485                         dbesc($contact["network"]),
1486                         dbesc($contact["url"]),
1487                         dbesc(normalise_link($contact["url"])),
1488                         dbesc($contact["photo"]),
1489                         dbesc(datetime_convert()),
1490                         dbesc(datetime_convert()),
1491                         dbesc($contact["location"]),
1492                         dbesc($contact["about"]),
1493                         intval($contact["hide"]),
1494                         intval($contact["generation"])
1495                 );
1496
1497                 $r = q("SELECT `id`, `network` FROM `gcontact` WHERE `nurl` = '%s' ORDER BY `id` LIMIT 2",
1498                         dbesc(normalise_link($contact["url"])));
1499
1500                 if ($r) {
1501                         $gcontact_id = $r[0]["id"];
1502
1503                         $doprobing = in_array($r[0]["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""));
1504                 }
1505         }
1506
1507         if ($doprobing) {
1508                 logger("Last Contact: ". $last_contact_str." - Last Failure: ".$last_failure_str." - Checking: ".$contact["url"], LOGGER_DEBUG);
1509                 proc_run('php', 'include/gprobe.php', bin2hex($contact["url"]));
1510         }
1511
1512         if ((count($r) > 1) AND ($gcontact_id > 0) AND ($contact["url"] != ""))
1513          q("DELETE FROM `gcontact` WHERE `nurl` = '%s' AND `id` != %d",
1514                 dbesc(normalise_link($contact["url"])),
1515                 intval($gcontact_id));
1516
1517         return $gcontact_id;
1518 }
1519
1520 /**
1521  * @brief Updates the gcontact table from a given array
1522  *
1523  * @param arr $contact contact array
1524  * @return bool|int Returns false if not found, integer if contact was found
1525  */
1526 function update_gcontact($contact) {
1527
1528         /// @todo update contact table as well
1529
1530         $gcontact_id = get_gcontact_id($contact);
1531
1532         if (!$gcontact_id)
1533                 return false;
1534
1535         $r = q("SELECT `name`, `nick`, `photo`, `location`, `about`, `addr`, `generation`, `birthday`, `gender`, `keywords`,
1536                         `hide`, `nsfw`, `network`, `alias`, `notify`, `server_url`, `connect`, `updated`, `url`
1537                 FROM `gcontact` WHERE `id` = %d LIMIT 1",
1538                 intval($gcontact_id));
1539
1540         // Get all field names
1541         $fields = array();
1542         foreach ($r[0] AS $field => $data)
1543                 $fields[$field] = $data;
1544
1545         unset($fields["url"]);
1546         unset($fields["updated"]);
1547         unset($fields["hide"]);
1548
1549         // Bugfix: We had an error in the storing of keywords which lead to the "0"
1550         // This value is still transmitted via poco.
1551         if ($contact["keywords"] == "0")
1552                 unset($contact["keywords"]);
1553
1554         if ($r[0]["keywords"] == "0")
1555                 $r[0]["keywords"] = "";
1556
1557         // assign all unassigned fields from the database entry
1558         foreach ($fields AS $field => $data)
1559                 if (!isset($contact[$field]) OR ($contact[$field] == ""))
1560                         $contact[$field] = $r[0][$field];
1561
1562         if (!isset($contact["hide"]))
1563                 $contact["hide"] = $r[0]["hide"];
1564
1565         $fields["hide"] = $r[0]["hide"];
1566
1567         if ($contact["network"] == NETWORK_STATUSNET)
1568                 $contact["network"] = NETWORK_OSTATUS;
1569
1570         // Replace alternate OStatus user format with the primary one
1571         fix_alternate_contact_address($contact);
1572
1573         if (!isset($contact["updated"]))
1574                 $contact["updated"] = datetime_convert();
1575
1576         if ($contact["server_url"] == "") {
1577                 $server_url = $contact["url"];
1578
1579                 $server_url = matching_url($server_url, $contact["alias"]);
1580                 if ($server_url != "")
1581                         $contact["server_url"] = $server_url;
1582
1583                 $server_url = matching_url($server_url, $contact["photo"]);
1584                 if ($server_url != "")
1585                         $contact["server_url"] = $server_url;
1586
1587                 $server_url = matching_url($server_url, $contact["notify"]);
1588                 if ($server_url != "")
1589                         $contact["server_url"] = $server_url;
1590         } else
1591                 $contact["server_url"] = normalise_link($contact["server_url"]);
1592
1593         if (($contact["addr"] == "") AND ($contact["server_url"] != "") AND ($contact["nick"] != "")) {
1594                 $hostname = str_replace("http://", "", $contact["server_url"]);
1595                 $contact["addr"] = $contact["nick"]."@".$hostname;
1596         }
1597
1598         // Check if any field changed
1599         $update = false;
1600         unset($fields["generation"]);
1601
1602         if ((($contact["generation"] > 0) AND ($contact["generation"] <= $r[0]["generation"])) OR ($r[0]["generation"] == 0)) {
1603                 foreach ($fields AS $field => $data)
1604                         if ($contact[$field] != $r[0][$field]) {
1605                                 logger("Difference for contact ".$contact["url"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
1606                                 $update = true;
1607                         }
1608
1609                 if ($contact["generation"] < $r[0]["generation"]) {
1610                         logger("Difference for contact ".$contact["url"]." in field 'generation'. new value: '".$contact["generation"]."', old value '".$r[0]["generation"]."'", LOGGER_DEBUG);
1611                         $update = true;
1612                 }
1613         }
1614
1615         if ($update) {
1616                 logger("Update gcontact for ".$contact["url"]." Callstack: ".App::callstack(), LOGGER_DEBUG);
1617
1618                 q("UPDATE `gcontact` SET `photo` = '%s', `name` = '%s', `nick` = '%s', `addr` = '%s', `network` = '%s',
1619                                         `birthday` = '%s', `gender` = '%s', `keywords` = '%s', `hide` = %d, `nsfw` = %d,
1620                                         `alias` = '%s', `notify` = '%s', `url` = '%s',
1621                                         `location` = '%s', `about` = '%s', `generation` = %d, `updated` = '%s',
1622                                         `server_url` = '%s', `connect` = '%s'
1623                                 WHERE `nurl` = '%s' AND (`generation` = 0 OR `generation` >= %d)",
1624                         dbesc($contact["photo"]), dbesc($contact["name"]), dbesc($contact["nick"]),
1625                         dbesc($contact["addr"]), dbesc($contact["network"]), dbesc($contact["birthday"]),
1626                         dbesc($contact["gender"]), dbesc($contact["keywords"]), intval($contact["hide"]),
1627                         intval($contact["nsfw"]), dbesc($contact["alias"]), dbesc($contact["notify"]),
1628                         dbesc($contact["url"]), dbesc($contact["location"]), dbesc($contact["about"]),
1629                         intval($contact["generation"]), dbesc($contact["updated"]),
1630                         dbesc($contact["server_url"]), dbesc($contact["connect"]),
1631                         dbesc(normalise_link($contact["url"])), intval($contact["generation"]));
1632
1633
1634                 // Now update the contact entry with the user id "0" as well.
1635                 // This is used for the shadow copies of public items.
1636                 $r = q("SELECT `id` FROM `contact` WHERE `nurl` = '%s' AND `uid` = 0 ORDER BY `id` LIMIT 1",
1637                         dbesc(normalise_link($contact["url"])));
1638
1639                 if ($r) {
1640                         logger("Update shadow contact ".$r[0]["id"], LOGGER_DEBUG);
1641
1642                         update_contact_avatar($contact["photo"], 0, $r[0]["id"]);
1643
1644                         q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s',
1645                                                 `network` = '%s', `bd` = '%s', `gender` = '%s',
1646                                                 `keywords` = '%s', `alias` = '%s', `url` = '%s',
1647                                                 `location` = '%s', `about` = '%s'
1648                                         WHERE `id` = %d",
1649                                 dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["addr"]),
1650                                 dbesc($contact["network"]), dbesc($contact["birthday"]), dbesc($contact["gender"]),
1651                                 dbesc($contact["keywords"]), dbesc($contact["alias"]), dbesc($contact["url"]),
1652                                 dbesc($contact["location"]), dbesc($contact["about"]), intval($r[0]["id"]));
1653                 }
1654         }
1655
1656         return $gcontact_id;
1657 }
1658
1659 /**
1660  * @brief Updates the gcontact entry from probe
1661  *
1662  * @param str $url profile link
1663  */
1664 function update_gcontact_from_probe($url) {
1665         $data = probe_url($url);
1666
1667         if (in_array($data["network"], array(NETWORK_PHANTOM))) {
1668                 logger("Invalid network for contact url ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
1669                 return;
1670         }
1671
1672         update_gcontact($data);
1673 }
1674
1675 /**
1676  * @brief Fetches users of given GNU Social server
1677  *
1678  * If the "Statistics" plugin is enabled (See http://gstools.org/ for details) we query user data with this.
1679  *
1680  * @param str $server Server address
1681  */
1682 function gs_fetch_users($server) {
1683
1684         logger("Fetching users from GNU Social server ".$server, LOGGER_DEBUG);
1685
1686         $a = get_app();
1687
1688         $url = $server."/main/statistics";
1689
1690         $result = z_fetch_url($url);
1691         if (!$result["success"])
1692                 return false;
1693
1694         $statistics = json_decode($result["body"]);
1695
1696         if (is_object($statistics->config)) {
1697                 if ($statistics->config->instance_with_ssl)
1698                         $server = "https://";
1699                 else
1700                         $server = "http://";
1701
1702                 $server .= $statistics->config->instance_address;
1703
1704                 $hostname = $statistics->config->instance_address;
1705         } else {
1706                 if ($statistics->instance_with_ssl)
1707                         $server = "https://";
1708                 else
1709                         $server = "http://";
1710
1711                 $server .= $statistics->instance_address;
1712
1713                 $hostname = $statistics->instance_address;
1714         }
1715
1716         if (is_object($statistics->users))
1717                 foreach ($statistics->users AS $nick => $user) {
1718                         $profile_url = $server."/".$user->nickname;
1719
1720                         $contact = array("url" => $profile_url,
1721                                         "name" => $user->fullname,
1722                                         "addr" => $user->nickname."@".$hostname,
1723                                         "nick" => $user->nickname,
1724                                         "about" => $user->bio,
1725                                         "network" => NETWORK_OSTATUS,
1726                                         "photo" => $a->get_baseurl()."/images/person-175.jpg");
1727                         get_gcontact_id($contact);
1728                 }
1729 }
1730
1731 /**
1732  * @brief Asking GNU Social server on a regular base for their user data
1733  *
1734  */
1735 function gs_discover() {
1736
1737         $requery_days = intval(get_config("system", "poco_requery_days"));
1738
1739         $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1740
1741         $r = q("SELECT `nurl`, `url` FROM `gserver` WHERE `last_contact` >= `last_failure` AND `network` = '%s' AND `last_poco_query` < '%s' ORDER BY RAND() LIMIT 5",
1742                 dbesc(NETWORK_OSTATUS), dbesc($last_update));
1743
1744         if (!$r)
1745                 return;
1746
1747         foreach ($r AS $server) {
1748                 gs_fetch_users($server["url"]);
1749                 q("UPDATE `gserver` SET `last_poco_query` = '%s' WHERE `nurl` = '%s'", dbesc(datetime_convert()), dbesc($server["nurl"]));
1750         }
1751 }
1752 ?>