mod/dfrn_request.php

   1 <?php
   2
   3 /**
   4  * @file mod/dfrn_request.php
   5  * @brief Module: dfrn_request
   6  *
   7  * Purpose: Handles communication associated with the issuance of
   8  * friend requests.
   9  *
  10  * @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  11  *    You also find a graphic which describes the confirmation process at
  12  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_request.png
  13  */
  14
  15 use Friendica\App;
  16 use Friendica\Core\Config;
  17 use Friendica\Core\L10n;
  18 use Friendica\Core\Logger;
  19 use Friendica\Core\Protocol;
  20 use Friendica\Core\Renderer;
  21 use Friendica\Core\Search;
  22 use Friendica\Core\System;
  23 use Friendica\Core\Session;
  24 use Friendica\Database\DBA;
  25 use Friendica\DI;
  26 use Friendica\Model\Contact;
  27 use Friendica\Model\Group;
  28 use Friendica\Model\Profile;
  29 use Friendica\Model\User;
  30 use Friendica\Module\Security\Login;
  31 use Friendica\Network\Probe;
  32 use Friendica\Protocol\Activity;
  33 use Friendica\Util\DateTimeFormat;
  34 use Friendica\Util\Network;
  35 use Friendica\Util\Strings;
  36
  37 function dfrn_request_init(App $a)
  38 {
  39         if ($a->argc > 1) {
  40                 $which = $a->argv[1];
  41                 Profile::load($a, $which);
  42         }
  43
  44         return;
  45 }
  46
  47 /**
  48  * Function: dfrn_request_post
  49  *
  50  * Purpose:
  51  * Handles multiple scenarios.
  52  *
  53  * Scenario 1:
  54  * Clicking 'submit' on a friend request page.
  55  *
  56  * Scenario 2:
  57  * Following Scenario 1, we are brought back to our home site
  58  * in order to link our friend request with our own server cell.
  59  * After logging in, we click 'submit' to approve the linkage.
  60  *
  61  * @param App $a
  62  * @throws ImagickException
  63  * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  64  */
  65 function dfrn_request_post(App $a)
  66 {
  67         if (($a->argc != 2) || (!count($a->profile))) {
  68                 Logger::log('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  69                 return;
  70         }
  71
  72         if (!empty($_POST['cancel'])) {
  73                 DI::baseUrl()->redirect();
  74         }
  75
  76         /*
  77          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  78          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  79          * That brings us here:
  80          */
  81         if (!empty($_POST['localconfirm']) && ($_POST['localconfirm'] == 1)) {
  82                 // Ensure this is a valid request
  83                 if (local_user() && ($a->user['nickname'] == $a->argv[1]) && !empty($_POST['dfrn_url'])) {
  84                         $dfrn_url    = Strings::escapeTags(trim($_POST['dfrn_url']));
  85                         $aes_allow   = !empty($_POST['aes_allow']);
  86                         $confirm_key = $_POST['confirm_key'] ?? '';
  87                         $hidden      = (!empty($_POST['hidden-contact']) ? intval($_POST['hidden-contact']) : 0);
  88                         $contact_record = null;
  89                         $blocked     = 1;
  90                         $pending     = 1;
  91
  92                         if (!empty($dfrn_url)) {
  93                                 // Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  94                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  95                                         intval(local_user()),
  96                                         DBA::escape(Strings::normaliseLink($dfrn_url))
  97                                 );
  98
  99                                 if (DBA::isResult($r)) {
 100                                         if (strlen($r[0]['dfrn-id'])) {
 101                                                 // We don't need to be here. It has already happened.
 102                                                 notice(L10n::t("This introduction has already been accepted.") . EOL);
 103                                                 return;
 104                                         } else {
 105                                                 $contact_record = $r[0];
 106                                         }
 107                                 }
 108
 109                                 if (is_array($contact_record)) {
 110                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 111                                                 intval($aes_allow),
 112                                                 intval($hidden),
 113                                                 intval($contact_record['id'])
 114                                         );
 115                                 } else {
 116                                         // Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 117                                         $parms = Probe::profile($dfrn_url);
 118
 119                                         if (!count($parms)) {
 120                                                 notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 121                                                 return;
 122                                         } else {
 123                                                 if (empty($parms['fn'])) {
 124                                                         notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 125                                                 }
 126                                                 if (empty($parms['photo'])) {
 127                                                         notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 128                                                 }
 129                                                 $invalid = Probe::validDfrn($parms);
 130                                                 if ($invalid) {
 131                                                         notice(L10n::tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid) . EOL);
 132                                                         return;
 133                                                 }
 134                                         }
 135
 136                                         $dfrn_request = $parms['dfrn-request'];
 137
 138                                         $photo = $parms["photo"];
 139
 140                                         // Escape the entire array
 141                                         DBA::escapeArray($parms);
 142
 143                                         // Create a contact record on our site for the other person
 144                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 145                                                 `request`, `confirm`, `notify`, `poll`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 146                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 147                                                 intval(local_user()),
 148                                                 DateTimeFormat::utcNow(),
 149                                                 DBA::escape($dfrn_url),
 150                                                 DBA::escape(Strings::normaliseLink($dfrn_url)),
 151                                                 $parms['addr'],
 152                                                 $parms['fn'],
 153                                                 $parms['nick'],
 154                                                 $parms['photo'],
 155                                                 $parms['key'],
 156                                                 $parms['dfrn-request'],
 157                                                 $parms['dfrn-confirm'],
 158                                                 $parms['dfrn-notify'],
 159                                                 $parms['dfrn-poll'],
 160                                                 DBA::escape(Protocol::DFRN),
 161                                                 intval($aes_allow),
 162                                                 intval($hidden),
 163                                                 intval($blocked),
 164                                                 intval($pending)
 165                                         );
 166                                 }
 167
 168                                 if ($r) {
 169                                         info(L10n::t("Introduction complete.") . EOL);
 170                                 }
 171
 172                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 173                                         intval(local_user()),
 174                                         DBA::escape($dfrn_url),
 175                                         $parms['key'] ?? '' // Potentially missing
 176                                 );
 177                                 if (DBA::isResult($r)) {
 178                                         Group::addMember(User::getDefaultGroup(local_user(), $r[0]["network"]), $r[0]['id']);
 179
 180                                         if (isset($photo)) {
 181                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 182                                         }
 183
 184                                         $forward_path = "contact/" . $r[0]['id'];
 185                                 } else {
 186                                         $forward_path = "contact";
 187                                 }
 188
 189                                 // Allow the blocked remote notification to complete
 190                                 if (is_array($contact_record)) {
 191                                         $dfrn_request = $contact_record['request'];
 192                                 }
 193
 194                                 if (!empty($dfrn_request) && strlen($confirm_key)) {
 195                                         Network::fetchUrl($dfrn_request . '?confirm_key=' . $confirm_key);
 196                                 }
 197
 198                                 // (ignore reply, nothing we can do it failed)
 199                                 DI::baseUrl()->redirect($forward_path);
 200                                 return; // NOTREACHED
 201                         }
 202                 }
 203
 204                 // invalid/bogus request
 205                 notice(L10n::t('Unrecoverable protocol error.') . EOL);
 206                 DI::baseUrl()->redirect();
 207                 return; // NOTREACHED
 208         }
 209
 210         /*
 211          * Otherwise:
 212          *
 213          * Scenario 1:
 214          * We are the requestee. A person from a remote cell has made an introduction
 215          * on our profile web page and clicked submit. We will use their DFRN-URL to
 216          * figure out how to contact their cell.
 217          *
 218          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 219          * and an introduction to show our user next time he/she logs in.
 220          * Finally redirect back to the requestor so that their site can record the request.
 221          * If our user (the requestee) later confirms this request, a record of it will need
 222          * to exist on the requestor's cell in order for the confirmation process to complete..
 223          *
 224          * It's possible that neither the requestor or the requestee are logged in at the moment,
 225          * and the requestor does not yet have any credentials to the requestee profile.
 226          *
 227          * Who is the requestee? We've already loaded their profile which means their nickname should be
 228          * in $a->argv[1] and we should have their complete info in $a->profile.
 229          *
 230          */
 231         if (!(is_array($a->profile) && count($a->profile))) {
 232                 notice(L10n::t('Profile unavailable.') . EOL);
 233                 return;
 234         }
 235
 236         $nickname       = $a->profile['nickname'];
 237         $uid            = $a->profile['uid'];
 238         $maxreq         = intval($a->profile['maxreq']);
 239         $contact_record = null;
 240         $failed         = false;
 241         $parms          = null;
 242         $blocked = 1;
 243         $pending = 1;
 244
 245         if (!empty($_POST['dfrn_url'])) {
 246                 // Block friend request spam
 247                 if ($maxreq) {
 248                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 249                                 DBA::escape(DateTimeFormat::utc('now - 24 hours')),
 250                                 intval($uid)
 251                         );
 252                         if (DBA::isResult($r) && count($r) > $maxreq) {
 253                                 notice(L10n::t('%s has received too many connection requests today.', $a->profile['name']) . EOL);
 254                                 notice(L10n::t('Spam protection measures have been invoked.') . EOL);
 255                                 notice(L10n::t('Friends are advised to please try again in 24 hours.') . EOL);
 256                                 return;
 257                         }
 258                 }
 259
 260                 /* Cleanup old introductions that remain blocked.
 261                  * Also remove the contact record, but only if there is no existing relationship
 262                  */
 263                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 264                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 265                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 266                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
 267                 );
 268                 if (DBA::isResult($r)) {
 269                         foreach ($r as $rr) {
 270                                 if (!$rr['rel']) {
 271                                         DBA::delete('contact', ['id' => $rr['cid'], 'self' => false]);
 272                                 }
 273                                 DBA::delete('intro', ['id' => $rr['iid']]);
 274                         }
 275                 }
 276
 277                 $url = trim($_POST['dfrn_url']);
 278                 if (!strlen($url)) {
 279                         notice(L10n::t("Invalid locator") . EOL);
 280                         return;
 281                 }
 282
 283                 $hcard = '';
 284
 285                 // Detect the network
 286                 $data = Probe::uri($url);
 287                 $network = $data["network"];
 288
 289                 // Canonicalise email-style profile locator
 290                 $url = Probe::webfingerDfrn($url, $hcard);
 291
 292                 if (substr($url, 0, 5) === 'stat:') {
 293                         // Every time we detect the remote subscription we define this as OStatus.
 294                         // We do this even if it is not OStatus.
 295                         // we only need to pass this through another section of the code.
 296                         if ($network != Protocol::DIASPORA) {
 297                                 $network = Protocol::OSTATUS;
 298                         }
 299
 300                         $url = substr($url, 5);
 301                 } else {
 302                         $network = Protocol::DFRN;
 303                 }
 304
 305                 Logger::log('dfrn_request: url: ' . $url . ',network=' . $network, Logger::DEBUG);
 306
 307                 if ($network === Protocol::DFRN) {
 308                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 309                                 intval($uid),
 310                                 DBA::escape($url)
 311                         );
 312
 313                         if (DBA::isResult($ret)) {
 314                                 if (strlen($ret[0]['issued-id'])) {
 315                                         notice(L10n::t('You have already introduced yourself here.') . EOL);
 316                                         return;
 317                                 } elseif ($ret[0]['rel'] == Contact::FRIEND) {
 318                                         notice(L10n::t('Apparently you are already friends with %s.', $a->profile['name']) . EOL);
 319                                         return;
 320                                 } else {
 321                                         $contact_record = $ret[0];
 322                                         $parms = ['dfrn-request' => $ret[0]['request']];
 323                                 }
 324                         }
 325
 326                         $issued_id = Strings::getRandomHex();
 327
 328                         if (is_array($contact_record)) {
 329                                 // There is a contact record but no issued-id, so this
 330                                 // is a reciprocal introduction from a known contact
 331                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 332                                         DBA::escape($issued_id),
 333                                         intval($contact_record['id'])
 334                                 );
 335                         } else {
 336                                 $url = Network::isUrlValid($url);
 337                                 if (!$url) {
 338                                         notice(L10n::t('Invalid profile URL.') . EOL);
 339                                         DI::baseUrl()->redirect(DI::args()->getCommand());
 340                                         return; // NOTREACHED
 341                                 }
 342
 343                                 if (!Network::isUrlAllowed($url)) {
 344                                         notice(L10n::t('Disallowed profile URL.') . EOL);
 345                                         DI::baseUrl()->redirect(DI::args()->getCommand());
 346                                         return; // NOTREACHED
 347                                 }
 348
 349                                 if (Network::isUrlBlocked($url)) {
 350                                         notice(L10n::t('Blocked domain') . EOL);
 351                                         DI::baseUrl()->redirect(DI::args()->getCommand());
 352                                         return; // NOTREACHED
 353                                 }
 354
 355                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 356
 357                                 if (!count($parms)) {
 358                                         notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 359                                         DI::baseUrl()->redirect(DI::args()->getCommand());
 360                                 } else {
 361                                         if (empty($parms['fn'])) {
 362                                                 notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 363                                         }
 364                                         if (empty($parms['photo'])) {
 365                                                 notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 366                                         }
 367                                         $invalid = Probe::validDfrn($parms);
 368                                         if ($invalid) {
 369                                                 notice(L10n::tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid) . EOL);
 370
 371                                                 return;
 372                                         }
 373                                 }
 374
 375                                 $parms['url'] = $url;
 376                                 $parms['issued-id'] = $issued_id;
 377                                 $photo = $parms["photo"];
 378
 379                                 DBA::escapeArray($parms);
 380                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 381                                         `request`, `confirm`, `notify`, `poll`, `network`, `blocked`, `pending` )
 382                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 383                                         intval($uid),
 384                                         DBA::escape(DateTimeFormat::utcNow()),
 385                                         $parms['url'],
 386                                         DBA::escape(Strings::normaliseLink($url)),
 387                                         $parms['addr'],
 388                                         $parms['fn'],
 389                                         $parms['nick'],
 390                                         $parms['issued-id'],
 391                                         $parms['photo'],
 392                                         $parms['key'],
 393                                         $parms['dfrn-request'],
 394                                         $parms['dfrn-confirm'],
 395                                         $parms['dfrn-notify'],
 396                                         $parms['dfrn-poll'],
 397                                         DBA::escape(Protocol::DFRN),
 398                                         intval($blocked),
 399                                         intval($pending)
 400                                 );
 401
 402                                 // find the contact record we just created
 403                                 if ($r) {
 404                                         $r = q("SELECT `id` FROM `contact`
 405                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 406                                                 intval($uid),
 407                                                 $parms['url'],
 408                                                 $parms['issued-id']
 409                                         );
 410                                         if (DBA::isResult($r)) {
 411                                                 $contact_record = $r[0];
 412                                                 Contact::updateAvatar($photo, $uid, $contact_record["id"], true);
 413                                         }
 414                                 }
 415                         }
 416                         if ($r === false) {
 417                                 notice(L10n::t('Failed to update contact record.') . EOL);
 418                                 return;
 419                         }
 420
 421                         $hash = Strings::getRandomHex() . (string) time();   // Generate a confirm_key
 422
 423                         if (is_array($contact_record)) {
 424                                 q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 425                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 426                                         intval($uid),
 427                                         intval($contact_record['id']),
 428                                         intval(!empty($_POST['knowyou'])),
 429                                         DBA::escape(Strings::escapeTags(trim($_POST['dfrn-request-message'] ?? ''))),
 430                                         DBA::escape($hash),
 431                                         DBA::escape(DateTimeFormat::utcNow())
 432                                 );
 433                         }
 434
 435                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 436                         if (!$failed) {
 437                                 info(L10n::t('Your introduction has been sent.') . EOL);
 438                         }
 439
 440                         // "Homecoming" - send the requestor back to their site to record the introduction.
 441                         $dfrn_url = bin2hex(DI::baseUrl()->get() . '/profile/' . $nickname);
 442                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 443
 444                         System::externalRedirect($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 445                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 446                                 . '&confirm_key=' . $hash
 447                                 . (($aes_allow) ? "&aes_allow=1" : "")
 448                         );
 449                         // NOTREACHED
 450                         // END $network === Protocol::DFRN
 451                 } elseif (($network != Protocol::PHANTOM) && ($url != "")) {
 452
 453                         /* Substitute our user's feed URL into $url template
 454                          * Send the subscriber home to subscribe
 455                          */
 456                         // Diaspora needs the uri in the format user@domain.tld
 457                         // Diaspora will support the remote subscription in a future version
 458                         if ($network == Protocol::DIASPORA) {
 459                                 $uri = $nickname . '@' . DI::baseUrl()->getHostname();
 460
 461                                 if (DI::baseUrl()->getUrlPath()) {
 462                                         $uri .= '/' . DI::baseUrl()->getUrlPath();
 463                                 }
 464
 465                                 $uri = urlencode($uri);
 466                         } else {
 467                                 $uri = 'profile/' . $nickname;
 468                         }
 469
 470                         $url = str_replace('{uri}', $uri, $url);
 471                         System::externalRedirect($url);
 472                         // NOTREACHED
 473                         // END $network != Protocol::PHANTOM
 474                 } else {
 475                         notice(L10n::t("Remote subscription can't be done for your network. Please subscribe directly on your system.") . EOL);
 476                         return;
 477                 }
 478         } return;
 479 }
 480
 481 function dfrn_request_content(App $a)
 482 {
 483         if ($a->argc != 2 || empty($a->profile)) {
 484                 return "";
 485         }
 486
 487         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 488         // to send us to the post section to record the introduction.
 489         if (!empty($_GET['dfrn_url'])) {
 490                 if (!local_user()) {
 491                         info(L10n::t("Please login to confirm introduction.") . EOL);
 492                         /* setup the return URL to come back to this page if they use openid */
 493                         return Login::form();
 494                 }
 495
 496                 // Edge case, but can easily happen in the wild. This person is authenticated,
 497                 // but not as the person who needs to deal with this request.
 498                 if ($a->user['nickname'] != $a->argv[1]) {
 499                         notice(L10n::t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 500                         return Login::form();
 501                 }
 502
 503                 $dfrn_url = Strings::escapeTags(trim(hex2bin($_GET['dfrn_url'])));
 504                 $aes_allow = !empty($_GET['aes_allow']);
 505                 $confirm_key = $_GET['confirm_key'] ?? '';
 506
 507                 // Checking fastlane for validity
 508                 if (!empty($_SESSION['fastlane']) && (Strings::normaliseLink($_SESSION["fastlane"]) == Strings::normaliseLink($dfrn_url))) {
 509                         $_POST["dfrn_url"] = $dfrn_url;
 510                         $_POST["confirm_key"] = $confirm_key;
 511                         $_POST["localconfirm"] = 1;
 512                         $_POST["hidden-contact"] = 0;
 513                         $_POST["submit"] = L10n::t('Confirm');
 514
 515                         dfrn_request_post($a);
 516
 517                         exit();
 518                 }
 519
 520                 $tpl = Renderer::getMarkupTemplate("dfrn_req_confirm.tpl");
 521                 $o = Renderer::replaceMacros($tpl, [
 522                         '$dfrn_url' => $dfrn_url,
 523                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 524                         '$hidethem' => L10n::t('Hide this contact'),
 525                         '$confirm_key' => $confirm_key,
 526                         '$welcome' => L10n::t('Welcome home %s.', $a->user['username']),
 527                         '$please' => L10n::t('Please confirm your introduction/connection request to %s.', $dfrn_url),
 528                         '$submit' => L10n::t('Confirm'),
 529                         '$uid' => $_SESSION['uid'],
 530                         '$nickname' => $a->user['nickname'],
 531                         'dfrn_rawurl' => $_GET['dfrn_url']
 532                 ]);
 533                 return $o;
 534         } elseif (!empty($_GET['confirm_key'])) {
 535                 // we are the requestee and it is now safe to send our user their introduction,
 536                 // We could just unblock it, but first we have to jump through a few hoops to
 537                 // send an email, or even to find out if we need to send an email.
 538                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 539                         DBA::escape($_GET['confirm_key'])
 540                 );
 541
 542                 if (DBA::isResult($intro)) {
 543                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 544                                 WHERE `contact`.`id` = %d LIMIT 1",
 545                                 intval($intro[0]['contact-id'])
 546                         );
 547
 548                         $auto_confirm = false;
 549
 550                         if (DBA::isResult($r)) {
 551                                 if ($r[0]['page-flags'] != User::PAGE_FLAGS_NORMAL && $r[0]['page-flags'] != User::PAGE_FLAGS_PRVGROUP) {
 552                                         $auto_confirm = true;
 553                                 }
 554
 555                                 if (!$auto_confirm) {
 556                                         notification([
 557                                                 'type'         => NOTIFY_INTRO,
 558                                                 'notify_flags' => $r[0]['notify-flags'],
 559                                                 'language'     => $r[0]['language'],
 560                                                 'to_name'      => $r[0]['username'],
 561                                                 'to_email'     => $r[0]['email'],
 562                                                 'uid'          => $r[0]['uid'],
 563                                                 'link'         => DI::baseUrl() . '/notifications/intros',
 564                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : L10n::t('[Name Withheld]')),
 565                                                 'source_link'  => $r[0]['url'],
 566                                                 'source_photo' => $r[0]['photo'],
 567                                                 'verb'         => Activity::REQ_FRIEND,
 568                                                 'otype'        => 'intro'
 569                                         ]);
 570                                 }
 571
 572                                 if ($auto_confirm) {
 573                                         require_once 'mod/dfrn_confirm.php';
 574                                         $handsfree = [
 575                                                 'uid'      => $r[0]['uid'],
 576                                                 'node'     => $r[0]['nickname'],
 577                                                 'dfrn_id'  => $r[0]['issued-id'],
 578                                                 'intro_id' => $intro[0]['id'],
 579                                                 'duplex'   => (($r[0]['page-flags'] == User::PAGE_FLAGS_FREELOVE) ? 1 : 0),
 580                                         ];
 581                                         dfrn_confirm_post($a, $handsfree);
 582                                 }
 583                         }
 584
 585                         if (!$auto_confirm) {
 586
 587                                 // If we are auto_confirming, this record will have already been nuked
 588                                 // in dfrn_confirm_post()
 589
 590                                 q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 591                                         DBA::escape($_GET['confirm_key'])
 592                                 );
 593                         }
 594                 }
 595
 596                 exit();
 597         } else {
 598                 // Normal web request. Display our user's introduction form.
 599                 if (Config::get('system', 'block_public') && !Session::isAuthenticated()) {
 600                         if (!Config::get('system', 'local_block')) {
 601                                 notice(L10n::t('Public access denied.') . EOL);
 602                                 return;
 603                         }
 604                 }
 605
 606                 // Try to auto-fill the profile address
 607                 // At first look if an address was provided
 608                 // Otherwise take the local address
 609                 if (!empty($_GET['addr'])) {
 610                         $myaddr = hex2bin($_GET['addr']);
 611                 } elseif (!empty($_GET['address'])) {
 612                         $myaddr = $_GET['address'];
 613                 } elseif (local_user()) {
 614                         if (strlen(DI::baseUrl()->getUrlPath())) {
 615                                 $myaddr = DI::baseUrl() . '/profile/' . $a->user['nickname'];
 616                         } else {
 617                                 $myaddr = $a->user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 618                         }
 619                 } else {
 620                         // last, try a zrl
 621                         $myaddr = Profile::getMyURL();
 622                 }
 623
 624                 $target_addr = $a->profile['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 625
 626                 /* The auto_request form only has the profile address
 627                  * because nobody is going to read the comments and
 628                  * it doesn't matter if they know you or not.
 629                  */
 630                 if ($a->profile['page-flags'] == User::PAGE_FLAGS_NORMAL) {
 631                         $tpl = Renderer::getMarkupTemplate('dfrn_request.tpl');
 632                 } else {
 633                         $tpl = Renderer::getMarkupTemplate('auto_request.tpl');
 634                 }
 635
 636                 $page_desc = L10n::t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 637
 638                 $invite_desc = L10n::t('If you are not yet a member of the free social web, <a href="%s">follow this link to find a public Friendica site and join us today</a>.', Search::getGlobalDirectory() . '/servers');
 639
 640                 $o = Renderer::replaceMacros($tpl, [
 641                         '$header' => L10n::t('Friend/Connection Request'),
 642                         '$desc' => L10n::t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@gnusocial.de'),
 643                         '$pls_answer' => L10n::t('Please answer the following:'),
 644                         '$does_know_you' => ['knowyou', L10n::t('Does %s know you?', $a->profile['name']), false, '', [L10n::t('No'), L10n::t('Yes')]],
 645                         '$add_note' => L10n::t('Add a personal note:'),
 646                         '$page_desc' => $page_desc,
 647                         '$friendica' => L10n::t('Friendica'),
 648                         '$statusnet' => L10n::t("GNU Social \x28Pleroma, Mastodon\x29"),
 649                         '$diaspora' => L10n::t("Diaspora \x28Socialhome, Hubzilla\x29"),
 650                         '$diasnote' => L10n::t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.', $target_addr),
 651                         '$your_address' => L10n::t('Your Identity Address:'),
 652                         '$invite_desc' => $invite_desc,
 653                         '$submit' => L10n::t('Submit Request'),
 654                         '$cancel' => L10n::t('Cancel'),
 655                         '$nickname' => $a->argv[1],
 656                         '$name' => $a->profile['name'],
 657                         '$myaddr' => $myaddr
 658                 ]);
 659                 return $o;
 660         }
 661 }