mod/dfrn_request.php

   1 <?php
   2 /**
   3  * @file mod/dfrn_request.php
   4  * @brief Module: dfrn_request
   5  *
   6  * Purpose: Handles communication associated with the issuance of
   7  * friend requests.
   8  *
   9  * @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  10  *    You also find a graphic which describes the confirmation process at
  11  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_request.png
  12  */
  13 use Friendica\App;
  14 use Friendica\Core\Config;
  15 use Friendica\Core\PConfig;
  16 use Friendica\Core\System;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Group;
  20 use Friendica\Model\User;
  21 use Friendica\Network\Probe;
  22
  23 require_once 'include/enotify.php';
  24
  25 function dfrn_request_init(App $a)
  26 {
  27         if ($a->argc > 1)
  28                 $which = $a->argv[1];
  29
  30         profile_load($a, $which);
  31         return;
  32 }
  33
  34
  35 /**
  36  * Function: dfrn_request_post
  37  *
  38  * Purpose:
  39  * Handles multiple scenarios.
  40  *
  41  * Scenario 1:
  42  * Clicking 'submit' on a friend request page.
  43  *
  44  * Scenario 2:
  45  * Following Scenario 1, we are brought back to our home site
  46  * in order to link our friend request with our own server cell.
  47  * After logging in, we click 'submit' to approve the linkage.
  48  *
  49  */
  50 function dfrn_request_post(App $a) {
  51
  52         if(($a->argc != 2) || (! count($a->profile))) {
  53                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  54                 return;
  55         }
  56
  57
  58         if(x($_POST, 'cancel')) {
  59                 goaway(System::baseUrl());
  60         }
  61
  62
  63         /*
  64          *
  65          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  66          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  67          * That brings us here:
  68          *
  69          */
  70
  71         if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  72
  73                 /*
  74                  * Ensure this is a valid request
  75                  */
  76
  77                 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
  78
  79
  80                         $dfrn_url    = notags(trim($_POST['dfrn_url']));
  81                         $aes_allow   = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  82                         $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
  83                         $hidden = ((x($_POST,'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  84                         $contact_record = null;
  85                         $blocked = 1;
  86                         $pending = 1;
  87
  88                         if(x($dfrn_url)) {
  89
  90                                 /*
  91                                  * Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  92                                  */
  93
  94                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  95                                         intval(local_user()),
  96                                         dbesc(normalise_link($dfrn_url))
  97                                 );
  98
  99                                 if (DBM::is_result($r)) {
 100                                         if(strlen($r[0]['dfrn-id'])) {
 101
 102                                                 /*
 103                                                  * We don't need to be here. It has already happened.
 104                                                  */
 105
 106                                                 notice( t("This introduction has already been accepted.") . EOL );
 107                                                 return;
 108                                         }
 109                                         else
 110                                                 $contact_record = $r[0];
 111                                 }
 112
 113                                 if(is_array($contact_record)) {
 114                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 115                                                 intval($aes_allow),
 116                                                 intval($hidden),
 117                                                 intval($contact_record['id'])
 118                                         );
 119                                 }
 120                                 else {
 121
 122                                         /*
 123                                          * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 124                                          */
 125
 126                                         $parms = Probe::profile($dfrn_url);
 127
 128                                         if (! count($parms)) {
 129                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 130                                                 return;
 131                                         }
 132                                         else {
 133                                                 if (! x($parms,'fn')) {
 134                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 135                                                 }
 136                                                 if (! x($parms,'photo')) {
 137                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
 138                                                 }
 139                                                 $invalid = Probe::validDfrn($parms);
 140                                                 if ($invalid) {
 141                                                         notice( sprintf( tt("%d required parameter was not found at the given location",
 142                                                                                                 "%d required parameters were not found at the given location",
 143                                                                                                 $invalid), $invalid) . EOL );
 144                                                         return;
 145                                                 }
 146                                         }
 147
 148                                         $dfrn_request = $parms['dfrn-request'];
 149
 150                                         $photo = $parms["photo"];
 151
 152                                         // Escape the entire array
 153                                         DBM::esc_array($parms);
 154
 155                                         /*
 156                                          * Create a contact record on our site for the other person
 157                                          */
 158
 159                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 160                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 161                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 162                                                 intval(local_user()),
 163                                                 datetime_convert(),
 164                                                 dbesc($dfrn_url),
 165                                                 dbesc(normalise_link($dfrn_url)),
 166                                                 $parms['addr'],
 167                                                 $parms['fn'],
 168                                                 $parms['nick'],
 169                                                 $parms['photo'],
 170                                                 $parms['key'],
 171                                                 $parms['dfrn-request'],
 172                                                 $parms['dfrn-confirm'],
 173                                                 $parms['dfrn-notify'],
 174                                                 $parms['dfrn-poll'],
 175                                                 $parms['dfrn-poco'],
 176                                                 dbesc(NETWORK_DFRN),
 177                                                 intval($aes_allow),
 178                                                 intval($hidden),
 179                                                 intval($blocked),
 180                                                 intval($pending)
 181                                         );
 182                                 }
 183
 184                                 if ($r) {
 185                                         info( t("Introduction complete.") . EOL);
 186                                 }
 187
 188                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 189                                         intval(local_user()),
 190                                         dbesc($dfrn_url),
 191                                         $parms['key'] // this was already escaped
 192                                 );
 193                                 if (DBM::is_result($r)) {
 194                                         Group::addMember(User::getDefaultGroup($uid, $r[0]["network"]), $r[0]['id']);
 195
 196                                         if (isset($photo)) {
 197                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 198                                         }
 199
 200                                         $forwardurl = System::baseUrl()."/contacts/".$r[0]['id'];
 201                                 } else {
 202                                         $forwardurl = System::baseUrl()."/contacts";
 203                                 }
 204
 205                                 /*
 206                                  * Allow the blocked remote notification to complete
 207                                  */
 208
 209                                 if (is_array($contact_record)) {
 210                                         $dfrn_request = $contact_record['request'];
 211                                 }
 212
 213                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 214                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 215                                 }
 216
 217                                 // (ignore reply, nothing we can do it failed)
 218
 219                                 // Old: goaway(zrl($dfrn_url));
 220                                 goaway($forwardurl);
 221                                 return; // NOTREACHED
 222
 223                         }
 224
 225                 }
 226
 227                 // invalid/bogus request
 228
 229                 notice( t('Unrecoverable protocol error.') . EOL );
 230                 goaway(System::baseUrl());
 231                 return; // NOTREACHED
 232         }
 233
 234         /*
 235          * Otherwise:
 236          *
 237          * Scenario 1:
 238          * We are the requestee. A person from a remote cell has made an introduction
 239          * on our profile web page and clicked submit. We will use their DFRN-URL to
 240          * figure out how to contact their cell.
 241          *
 242          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 243          * and an introduction to show our user next time he/she logs in.
 244          * Finally redirect back to the requestor so that their site can record the request.
 245          * If our user (the requestee) later confirms this request, a record of it will need
 246          * to exist on the requestor's cell in order for the confirmation process to complete..
 247          *
 248          * It's possible that neither the requestor or the requestee are logged in at the moment,
 249          * and the requestor does not yet have any credentials to the requestee profile.
 250          *
 251          * Who is the requestee? We've already loaded their profile which means their nickname should be
 252          * in $a->argv[1] and we should have their complete info in $a->profile.
 253          *
 254          */
 255
 256         if(! (is_array($a->profile) && count($a->profile))) {
 257                 notice( t('Profile unavailable.') . EOL);
 258                 return;
 259         }
 260
 261         $nickname       = $a->profile['nickname'];
 262         $notify_flags   = $a->profile['notify-flags'];
 263         $uid            = $a->profile['uid'];
 264         $maxreq         = intval($a->profile['maxreq']);
 265         $contact_record = null;
 266         $failed         = false;
 267         $parms          = null;
 268         $blocked = 1;
 269         $pending = 1;
 270
 271
 272         if( x($_POST,'dfrn_url')) {
 273
 274                 /*
 275                  * Block friend request spam
 276                  */
 277
 278                 if($maxreq) {
 279                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 280                                 dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
 281                                 intval($uid)
 282                         );
 283                         if (DBM::is_result($r) && count($r) > $maxreq) {
 284                                 notice( sprintf( t('%s has received too many connection requests today.'),  $a->profile['name']) . EOL);
 285                                 notice( t('Spam protection measures have been invoked.') . EOL);
 286                                 notice( t('Friends are advised to please try again in 24 hours.') . EOL);
 287                                 return;
 288                         }
 289                 }
 290
 291                 /*
 292                  *
 293                  * Cleanup old introductions that remain blocked.
 294                  * Also remove the contact record, but only if there is no existing relationship
 295                  */
 296
 297                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 298                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 299                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 300                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
 301                 );
 302                 if (DBM::is_result($r)) {
 303                         foreach ($r as $rr) {
 304                                 if(! $rr['rel']) {
 305                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 306                                                 intval($rr['cid'])
 307                                         );
 308                                 }
 309                                 q("DELETE FROM `intro` WHERE `id` = %d",
 310                                         intval($rr['iid'])
 311                                 );
 312                         }
 313                 }
 314
 315                 $real_name = (x($_POST,'realname') ? notags(trim($_POST['realname'])) : '');
 316
 317                 $url = trim($_POST['dfrn_url']);
 318                 if(! strlen($url)) {
 319                         notice( t("Invalid locator") . EOL );
 320                         return;
 321                 }
 322
 323                 $hcard = '';
 324
 325                 // Detect the network
 326                 $data = Probe::uri($url);
 327                 $network = $data["network"];
 328
 329                 // Canonicalise email-style profile locator
 330                 $url = Probe::webfingerDfrn($url,$hcard);
 331
 332                 if (substr($url,0,5) === 'stat:') {
 333
 334                         // Every time we detect the remote subscription we define this as OStatus.
 335                         // We do this even if it is not OStatus.
 336                         // we only need to pass this through another section of the code.
 337                         if ($network != NETWORK_DIASPORA) {
 338                                 $network = NETWORK_OSTATUS;
 339                         }
 340
 341                         $url = substr($url,5);
 342                 } else {
 343                         $network = NETWORK_DFRN;
 344                 }
 345
 346                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 347
 348                 if($network === NETWORK_DFRN) {
 349                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 350                                 intval($uid),
 351                                 dbesc($url)
 352                         );
 353
 354                         if (DBM::is_result($ret)) {
 355                                 if(strlen($ret[0]['issued-id'])) {
 356                                         notice( t('You have already introduced yourself here.') . EOL );
 357                                         return;
 358                                 }
 359                                 elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 360                                         notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
 361                                         return;
 362                                 }
 363                                 else {
 364                                         $contact_record = $ret[0];
 365                                         $parms = array('dfrn-request' => $ret[0]['request']);
 366                                 }
 367                         }
 368
 369                         $issued_id = random_string();
 370
 371                         if(is_array($contact_record)) {
 372                                 // There is a contact record but no issued-id, so this
 373                                 // is a reciprocal introduction from a known contact
 374                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 375                                         dbesc($issued_id),
 376                                         intval($contact_record['id'])
 377                                 );
 378                         }
 379                         else {
 380                                 if (! validate_url($url)) {
 381                                         notice( t('Invalid profile URL.') . EOL);
 382                                         goaway(System::baseUrl() . '/' . $a->cmd);
 383                                         return; // NOTREACHED
 384                                 }
 385
 386                                 if (! allowed_url($url)) {
 387                                         notice( t('Disallowed profile URL.') . EOL);
 388                                         goaway(System::baseUrl() . '/' . $a->cmd);
 389                                         return; // NOTREACHED
 390                                 }
 391
 392                                 if (blocked_url($url)) {
 393                                         notice( t('Blocked domain') . EOL);
 394                                         goaway(System::baseUrl() . '/' . $a->cmd);
 395                                         return; // NOTREACHED
 396                                 }
 397
 398                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 399
 400                                 if (! count($parms)) {
 401                                         notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 402                                         goaway(System::baseUrl() . '/' . $a->cmd);
 403                                 }
 404                                 else {
 405                                         if (! x($parms,'fn')) {
 406                                                 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 407                                         }
 408                                         if (! x($parms,'photo')) {
 409                                                 notice( t('Warning: profile location has no profile photo.') . EOL );
 410                                         }
 411                                         $invalid = Probe::validDfrn($parms);
 412                                         if ($invalid) {
 413                                                 notice( sprintf( tt("%d required parameter was not found at the given location",
 414                                                                                         "%d required parameters were not found at the given location",
 415                                                                                         $invalid), $invalid) . EOL );
 416
 417                                                 return;
 418                                         }
 419                                 }
 420
 421
 422                                 $parms['url'] = $url;
 423                                 $parms['issued-id'] = $issued_id;
 424                                 $photo = $parms["photo"];
 425
 426                                 DBM::esc_array($parms);
 427                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 428                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 429                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 430                                         intval($uid),
 431                                         dbesc(datetime_convert()),
 432                                         $parms['url'],
 433                                         dbesc(normalise_link($url)),
 434                                         $parms['addr'],
 435                                         $parms['fn'],
 436                                         $parms['nick'],
 437                                         $parms['issued-id'],
 438                                         $parms['photo'],
 439                                         $parms['key'],
 440                                         $parms['dfrn-request'],
 441                                         $parms['dfrn-confirm'],
 442                                         $parms['dfrn-notify'],
 443                                         $parms['dfrn-poll'],
 444                                         $parms['dfrn-poco'],
 445                                         dbesc(NETWORK_DFRN),
 446                                         intval($blocked),
 447                                         intval($pending)
 448                                 );
 449
 450                                 // find the contact record we just created
 451                                 if ($r) {
 452                                         $r = q("SELECT `id` FROM `contact`
 453                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 454                                                 intval($uid),
 455                                                 $parms['url'],
 456                                                 $parms['issued-id']
 457                                         );
 458                                         if (DBM::is_result($r)) {
 459                                                 $contact_record = $r[0];
 460                                                 Contact::updateAvatar($photo, $uid, $contact_record["id"], true);
 461                                         }
 462                                 }
 463
 464                         }
 465                         if ($r === false) {
 466                                 notice( t('Failed to update contact record.') . EOL );
 467                                 return;
 468                         }
 469
 470                         $hash = random_string() . (string) time();   // Generate a confirm_key
 471
 472                         if (is_array($contact_record)) {
 473                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 474                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 475                                         intval($uid),
 476                                         intval($contact_record['id']),
 477                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 478                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 479                                         dbesc($hash),
 480                                         dbesc(datetime_convert())
 481                                 );
 482                         }
 483
 484                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 485
 486                         if (! $failed) {
 487                                 info( t('Your introduction has been sent.') . EOL );
 488                         }
 489
 490                         // "Homecoming" - send the requestor back to their site to record the introduction.
 491
 492                         $dfrn_url = bin2hex(System::baseUrl() . '/profile/' . $nickname);
 493                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 494
 495                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 496                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 497                                 . '&confirm_key='  . $hash
 498                                 . (($aes_allow) ? "&aes_allow=1" : "")
 499                         );
 500                         // NOTREACHED
 501                         // END $network === NETWORK_DFRN
 502                 } elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 503
 504                         /*
 505                          *
 506                          * Substitute our user's feed URL into $url template
 507                          * Send the subscriber home to subscribe
 508                          *
 509                          */
 510
 511                         // Diaspora needs the uri in the format user@domain.tld
 512                         // Diaspora will support the remote subscription in a future version
 513                         if ($network == NETWORK_DIASPORA) {
 514                                 $uri = $nickname.'@'.$a->get_hostname();
 515
 516                                 if ($a->get_path())
 517                                         $uri .= '/'.$a->get_path();
 518
 519                                 $uri = urlencode($uri);
 520                         } else {
 521                                 $uri = System::baseUrl().'/profile/'.$nickname;
 522                         }
 523
 524                         $url = str_replace('{uri}', $uri, $url);
 525                         goaway($url);
 526                         // NOTREACHED
 527                         // END $network != NETWORK_PHANTOM
 528                 } else {
 529                         notice(t("Remote subscription can't be done for your network. Please subscribe directly on your system.").EOL);
 530                         return;
 531                 }
 532
 533         }       return;
 534 }
 535
 536
 537 function dfrn_request_content(App $a) {
 538
 539         if (($a->argc != 2) || (! count($a->profile))) {
 540                 return "";
 541         }
 542
 543
 544         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 545         // to send us to the post section to record the introduction.
 546
 547         if (x($_GET,'dfrn_url')) {
 548
 549                 if (! local_user()) {
 550                         info( t("Please login to confirm introduction.") . EOL );
 551                         /* setup the return URL to come back to this page if they use openid */
 552                         $_SESSION['return_url'] = $a->query_string;
 553                         return login();
 554                 }
 555
 556                 // Edge case, but can easily happen in the wild. This person is authenticated,
 557                 // but not as the person who needs to deal with this request.
 558
 559                 if ($a->user['nickname'] != $a->argv[1]) {
 560                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 561                         return login();
 562                 }
 563
 564                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 565                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 566                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 567
 568                 // Checking fastlane for validity
 569                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 570                         $_POST["dfrn_url"] = $dfrn_url;
 571                         $_POST["confirm_key"] = $confirm_key;
 572                         $_POST["localconfirm"] = 1;
 573                         $_POST["hidden-contact"] = 0;
 574                         $_POST["submit"] = t('Confirm');
 575
 576                         dfrn_request_post($a);
 577
 578                         killme();
 579                         return; // NOTREACHED
 580                 }
 581
 582                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 583                 $o  = replace_macros($tpl,array(
 584                         '$dfrn_url' => $dfrn_url,
 585                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 586                         '$hidethem' => t('Hide this contact'),
 587                         '$hidechecked' => '',
 588                         '$confirm_key' => $confirm_key,
 589                         '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
 590                         '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
 591                         '$submit' => t('Confirm'),
 592                         '$uid' => $_SESSION['uid'],
 593                         '$nickname' => $a->user['nickname'],
 594                         'dfrn_rawurl' => $_GET['dfrn_url']
 595                         ));
 596                 return $o;
 597
 598         }
 599         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 600
 601                 // we are the requestee and it is now safe to send our user their introduction,
 602                 // We could just unblock it, but first we have to jump through a few hoops to
 603                 // send an email, or even to find out if we need to send an email.
 604
 605                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 606                         dbesc($_GET['confirm_key'])
 607                 );
 608
 609                 if (DBM::is_result($intro)) {
 610
 611                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 612                                 WHERE `contact`.`id` = %d LIMIT 1",
 613                                 intval($intro[0]['contact-id'])
 614                         );
 615
 616                         $auto_confirm = false;
 617
 618                         if (DBM::is_result($r)) {
 619                                 if(($r[0]['page-flags'] != PAGE_NORMAL) && ($r[0]['page-flags'] != PAGE_PRVGROUP))
 620                                         $auto_confirm = true;
 621
 622                                 if(! $auto_confirm) {
 623
 624                                         notification(array(
 625                                                 'type'         => NOTIFY_INTRO,
 626                                                 'notify_flags' => $r[0]['notify-flags'],
 627                                                 'language'     => $r[0]['language'],
 628                                                 'to_name'      => $r[0]['username'],
 629                                                 'to_email'     => $r[0]['email'],
 630                                                 'uid'          => $r[0]['uid'],
 631                                                 'link'         => System::baseUrl() . '/notifications/intros',
 632                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 633                                                 'source_link'  => $r[0]['url'],
 634                                                 'source_photo' => $r[0]['photo'],
 635                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 636                                                 'otype'        => 'intro'
 637                                         ));
 638                                 }
 639
 640                                 if($auto_confirm) {
 641                                         require_once 'mod/dfrn_confirm.php';
 642                                         $handsfree = array(
 643                                                 'uid'      => $r[0]['uid'],
 644                                                 'node'     => $r[0]['nickname'],
 645                                                 'dfrn_id'  => $r[0]['issued-id'],
 646                                                 'intro_id' => $intro[0]['id'],
 647                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 648                                                 'activity' => intval(PConfig::get($r[0]['uid'],'system','post_newfriend'))
 649                                         );
 650                                         dfrn_confirm_post($a,$handsfree);
 651                                 }
 652
 653                         }
 654
 655                         if(! $auto_confirm) {
 656
 657                                 // If we are auto_confirming, this record will have already been nuked
 658                                 // in dfrn_confirm_post()
 659
 660                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 661                                         dbesc($_GET['confirm_key'])
 662                                 );
 663                         }
 664                 }
 665
 666                 killme();
 667                 return; // NOTREACHED
 668         }
 669         else {
 670
 671                 /*
 672                  * Normal web request. Display our user's introduction form.
 673                  */
 674
 675                 if((Config::get('system','block_public')) && (! local_user()) && (! remote_user())) {
 676                         if(! Config::get('system','local_block')) {
 677                                 notice( t('Public access denied.') . EOL);
 678                                 return;
 679                         }
 680                 }
 681
 682
 683                 /*
 684                  * Try to auto-fill the profile address
 685                  */
 686
 687                 // At first look if an address was provided
 688                 // Otherwise take the local address
 689                 if (x($_GET,'addr') && ($_GET['addr'] != "")) {
 690                         $myaddr = hex2bin($_GET['addr']);
 691                 } elseif (x($_GET,'address') && ($_GET['address'] != "")) {
 692                         $myaddr = $_GET['address'];
 693                 } elseif (local_user()) {
 694                         if (strlen($a->path)) {
 695                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 696                         } else {
 697                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(),'://') + 3 );
 698                         }
 699                 } else {
 700                         // last, try a zrl
 701                         $myaddr = get_my_url();
 702                 }
 703
 704                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(),'://') + 3 );
 705
 706
 707                 /*
 708                  *
 709                  * The auto_request form only has the profile address
 710                  * because nobody is going to read the comments and
 711                  * it doesn't matter if they know you or not.
 712                  *
 713                  */
 714
 715                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 716                         $tpl = get_markup_template('dfrn_request.tpl');
 717                 } else {
 718                         $tpl = get_markup_template('auto_request.tpl');
 719                 }
 720
 721                 $page_desc = t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 722
 723                 $invite_desc = sprintf(
 724                         t('If you are not yet a member of the free social web, <a href="%s/siteinfo">follow this link to find a public Friendica site and join us today</a>.'),
 725                         get_server()
 726                 );
 727
 728                 $o = replace_macros($tpl,array(
 729                         '$header' => t('Friend/Connection Request'),
 730                         '$desc' => t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@gnusocial.de'),
 731                         '$pls_answer' => t('Please answer the following:'),
 732                         '$does_know_you' => array('knowyou', sprintf(t('Does %s know you?'),$a->profile['name']), false, '', array(t('No'), t('Yes'))),
 733                         /*'$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']),
 734                         '$yes' => t('Yes'),
 735                         '$no' => t('No'), */
 736                         '$add_note' => t('Add a personal note:'),
 737                         '$page_desc' => $page_desc,
 738                         '$friendica' => t('Friendica'),
 739                         '$statusnet' => t('GNU Social (Pleroma, Mastodon)'),
 740                         '$diaspora' => t('Diaspora (Socialhome, Hubzilla)'),
 741                         '$diasnote' => sprintf (t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.'),$target_addr),
 742                         '$your_address' => t('Your Identity Address:'),
 743                         '$invite_desc' => $invite_desc,
 744                         '$submit' => t('Submit Request'),
 745                         '$cancel' => t('Cancel'),
 746                         '$nickname' => $a->argv[1],
 747                         '$name' => $a->profile['name'],
 748                         '$myaddr' => $myaddr
 749                 ));
 750                 return $o;
 751         }
 752
 753         return; // Somebody is fishing.
 754 }