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 use Friendica\App;
  15 use Friendica\Core\Config;
  16 use Friendica\Core\L10n;
  17 use Friendica\Core\PConfig;
  18 use Friendica\Core\System;
  19 use Friendica\Database\DBM;
  20 use Friendica\Model\Contact;
  21 use Friendica\Model\Group;
  22 use Friendica\Model\User;
  23 use Friendica\Model\Profile;
  24 use Friendica\Module\Login;
  25 use Friendica\Network\Probe;
  26 use Friendica\Util\Network;
  27
  28 require_once 'include/enotify.php';
  29
  30 function dfrn_request_init(App $a)
  31 {
  32         if ($a->argc > 1) {
  33                 $which = $a->argv[1];
  34         }
  35
  36         Profile::load($a, $which);
  37         return;
  38 }
  39
  40 /**
  41  * Function: dfrn_request_post
  42  *
  43  * Purpose:
  44  * Handles multiple scenarios.
  45  *
  46  * Scenario 1:
  47  * Clicking 'submit' on a friend request page.
  48  *
  49  * Scenario 2:
  50  * Following Scenario 1, we are brought back to our home site
  51  * in order to link our friend request with our own server cell.
  52  * After logging in, we click 'submit' to approve the linkage.
  53  *
  54  */
  55 function dfrn_request_post(App $a)
  56 {
  57         if (($a->argc != 2) || (!count($a->profile))) {
  58                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  59                 return;
  60         }
  61
  62         if (x($_POST, 'cancel')) {
  63                 goaway(System::baseUrl());
  64         }
  65
  66         /*
  67          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  68          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  69          * That brings us here:
  70          */
  71         if ((x($_POST, 'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  72                 // Ensure this is a valid request
  73                 if (local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST, 'dfrn_url'))) {
  74                         $dfrn_url = notags(trim($_POST['dfrn_url']));
  75                         $aes_allow = (((x($_POST, 'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  76                         $confirm_key = ((x($_POST, 'confirm_key')) ? $_POST['confirm_key'] : "");
  77                         $hidden = ((x($_POST, 'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  78                         $contact_record = null;
  79                         $blocked = 1;
  80                         $pending = 1;
  81
  82                         if (x($dfrn_url)) {
  83                                 // Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  84                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  85                                         intval(local_user()),
  86                                         dbesc(normalise_link($dfrn_url))
  87                                 );
  88
  89                                 if (DBM::is_result($r)) {
  90                                         if (strlen($r[0]['dfrn-id'])) {
  91                                                 // We don't need to be here. It has already happened.
  92                                                 notice(L10n::t("This introduction has already been accepted.") . EOL);
  93                                                 return;
  94                                         } else {
  95                                                 $contact_record = $r[0];
  96                                         }
  97                                 }
  98
  99                                 if (is_array($contact_record)) {
 100                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 101                                                 intval($aes_allow),
 102                                                 intval($hidden),
 103                                                 intval($contact_record['id'])
 104                                         );
 105                                 } else {
 106                                         // Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 107                                         $parms = Probe::profile($dfrn_url);
 108
 109                                         if (!count($parms)) {
 110                                                 notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 111                                                 return;
 112                                         } else {
 113                                                 if (!x($parms, 'fn')) {
 114                                                         notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 115                                                 }
 116                                                 if (!x($parms, 'photo')) {
 117                                                         notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 118                                                 }
 119                                                 $invalid = Probe::validDfrn($parms);
 120                                                 if ($invalid) {
 121                                                         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);
 122                                                         return;
 123                                                 }
 124                                         }
 125
 126                                         $dfrn_request = $parms['dfrn-request'];
 127
 128                                         $photo = $parms["photo"];
 129
 130                                         // Escape the entire array
 131                                         DBM::esc_array($parms);
 132
 133                                         // Create a contact record on our site for the other person
 134                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 135                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 136                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 137                                                 intval(local_user()),
 138                                                 datetime_convert(),
 139                                                 dbesc($dfrn_url),
 140                                                 dbesc(normalise_link($dfrn_url)),
 141                                                 $parms['addr'],
 142                                                 $parms['fn'],
 143                                                 $parms['nick'],
 144                                                 $parms['photo'],
 145                                                 $parms['key'],
 146                                                 $parms['dfrn-request'],
 147                                                 $parms['dfrn-confirm'],
 148                                                 $parms['dfrn-notify'],
 149                                                 $parms['dfrn-poll'],
 150                                                 $parms['dfrn-poco'],
 151                                                 dbesc(NETWORK_DFRN),
 152                                                 intval($aes_allow),
 153                                                 intval($hidden),
 154                                                 intval($blocked),
 155                                                 intval($pending)
 156                                         );
 157                                 }
 158
 159                                 if ($r) {
 160                                         info(L10n::t("Introduction complete.") . EOL);
 161                                 }
 162
 163                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 164                                         intval(local_user()),
 165                                         dbesc($dfrn_url),
 166                                         $parms['key'] // this was already escaped
 167                                 );
 168                                 if (DBM::is_result($r)) {
 169                                         Group::addMember(User::getDefaultGroup($uid, $r[0]["network"]), $r[0]['id']);
 170
 171                                         if (isset($photo)) {
 172                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 173                                         }
 174
 175                                         $forwardurl = System::baseUrl() . "/contacts/" . $r[0]['id'];
 176                                 } else {
 177                                         $forwardurl = System::baseUrl() . "/contacts";
 178                                 }
 179
 180                                 // Allow the blocked remote notification to complete
 181                                 if (is_array($contact_record)) {
 182                                         $dfrn_request = $contact_record['request'];
 183                                 }
 184
 185                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 186                                         $s = Network::fetchURL($dfrn_request . '?confirm_key=' . $confirm_key);
 187                                 }
 188
 189                                 // (ignore reply, nothing we can do it failed)
 190                                 // Old: goaway(Profile::zrl($dfrn_url));
 191                                 goaway($forwardurl);
 192                                 return; // NOTREACHED
 193                         }
 194                 }
 195
 196                 // invalid/bogus request
 197                 notice(L10n::t('Unrecoverable protocol error.') . EOL);
 198                 goaway(System::baseUrl());
 199                 return; // NOTREACHED
 200         }
 201
 202         /*
 203          * Otherwise:
 204          *
 205          * Scenario 1:
 206          * We are the requestee. A person from a remote cell has made an introduction
 207          * on our profile web page and clicked submit. We will use their DFRN-URL to
 208          * figure out how to contact their cell.
 209          *
 210          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 211          * and an introduction to show our user next time he/she logs in.
 212          * Finally redirect back to the requestor so that their site can record the request.
 213          * If our user (the requestee) later confirms this request, a record of it will need
 214          * to exist on the requestor's cell in order for the confirmation process to complete..
 215          *
 216          * It's possible that neither the requestor or the requestee are logged in at the moment,
 217          * and the requestor does not yet have any credentials to the requestee profile.
 218          *
 219          * Who is the requestee? We've already loaded their profile which means their nickname should be
 220          * in $a->argv[1] and we should have their complete info in $a->profile.
 221          *
 222          */
 223         if (!(is_array($a->profile) && count($a->profile))) {
 224                 notice(L10n::t('Profile unavailable.') . EOL);
 225                 return;
 226         }
 227
 228         $nickname       = $a->profile['nickname'];
 229         $notify_flags   = $a->profile['notify-flags'];
 230         $uid            = $a->profile['uid'];
 231         $maxreq         = intval($a->profile['maxreq']);
 232         $contact_record = null;
 233         $failed         = false;
 234         $parms          = null;
 235         $blocked = 1;
 236         $pending = 1;
 237
 238         if (x($_POST, 'dfrn_url')) {
 239                 // Block friend request spam
 240                 if ($maxreq) {
 241                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 242                                 dbesc(datetime_convert('UTC', 'UTC', 'now - 24 hours')),
 243                                 intval($uid)
 244                         );
 245                         if (DBM::is_result($r) && count($r) > $maxreq) {
 246                                 notice(L10n::t('%s has received too many connection requests today.', $a->profile['name']) . EOL);
 247                                 notice(L10n::t('Spam protection measures have been invoked.') . EOL);
 248                                 notice(L10n::t('Friends are advised to please try again in 24 hours.') . EOL);
 249                                 return;
 250                         }
 251                 }
 252
 253                 /* Cleanup old introductions that remain blocked.
 254                  * Also remove the contact record, but only if there is no existing relationship
 255                  */
 256                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 257                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 258                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 259                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
 260                 );
 261                 if (DBM::is_result($r)) {
 262                         foreach ($r as $rr) {
 263                                 if (!$rr['rel']) {
 264                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 265                                                 intval($rr['cid'])
 266                                         );
 267                                 }
 268                                 q("DELETE FROM `intro` WHERE `id` = %d",
 269                                         intval($rr['iid'])
 270                                 );
 271                         }
 272                 }
 273
 274                 $real_name = x($_POST, 'realname') ? notags(trim($_POST['realname'])) : '';
 275
 276                 $url = trim($_POST['dfrn_url']);
 277                 if (!strlen($url)) {
 278                         notice(L10n::t("Invalid locator") . EOL);
 279                         return;
 280                 }
 281
 282                 $hcard = '';
 283
 284                 // Detect the network
 285                 $data = Probe::uri($url);
 286                 $network = $data["network"];
 287
 288                 // Canonicalise email-style profile locator
 289                 $url = Probe::webfingerDfrn($url, $hcard);
 290
 291                 if (substr($url, 0, 5) === 'stat:') {
 292                         // Every time we detect the remote subscription we define this as OStatus.
 293                         // We do this even if it is not OStatus.
 294                         // we only need to pass this through another section of the code.
 295                         if ($network != NETWORK_DIASPORA) {
 296                                 $network = NETWORK_OSTATUS;
 297                         }
 298
 299                         $url = substr($url, 5);
 300                 } else {
 301                         $network = NETWORK_DFRN;
 302                 }
 303
 304                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 305
 306                 if ($network === NETWORK_DFRN) {
 307                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 308                                 intval($uid),
 309                                 dbesc($url)
 310                         );
 311
 312                         if (DBM::is_result($ret)) {
 313                                 if (strlen($ret[0]['issued-id'])) {
 314                                         notice(L10n::t('You have already introduced yourself here.') . EOL);
 315                                         return;
 316                                 } elseif ($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 317                                         notice(L10n::t('Apparently you are already friends with %s.', $a->profile['name']) . EOL);
 318                                         return;
 319                                 } else {
 320                                         $contact_record = $ret[0];
 321                                         $parms = ['dfrn-request' => $ret[0]['request']];
 322                                 }
 323                         }
 324
 325                         $issued_id = random_string();
 326
 327                         if (is_array($contact_record)) {
 328                                 // There is a contact record but no issued-id, so this
 329                                 // is a reciprocal introduction from a known contact
 330                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 331                                         dbesc($issued_id),
 332                                         intval($contact_record['id'])
 333                                 );
 334                         } else {
 335                                 $url = validate_url($url);
 336                                 if (!$url) {
 337                                         notice(L10n::t('Invalid profile URL.') . EOL);
 338                                         goaway(System::baseUrl() . '/' . $a->cmd);
 339                                         return; // NOTREACHED
 340                                 }
 341
 342                                 if (!allowed_url($url)) {
 343                                         notice(L10n::t('Disallowed profile URL.') . EOL);
 344                                         goaway(System::baseUrl() . '/' . $a->cmd);
 345                                         return; // NOTREACHED
 346                                 }
 347
 348                                 if (blocked_url($url)) {
 349                                         notice(L10n::t('Blocked domain') . EOL);
 350                                         goaway(System::baseUrl() . '/' . $a->cmd);
 351                                         return; // NOTREACHED
 352                                 }
 353
 354                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 355
 356                                 if (!count($parms)) {
 357                                         notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 358                                         goaway(System::baseUrl() . '/' . $a->cmd);
 359                                 } else {
 360                                         if (!x($parms, 'fn')) {
 361                                                 notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 362                                         }
 363                                         if (!x($parms, 'photo')) {
 364                                                 notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 365                                         }
 366                                         $invalid = Probe::validDfrn($parms);
 367                                         if ($invalid) {
 368                                                 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);
 369
 370                                                 return;
 371                                         }
 372                                 }
 373
 374                                 $parms['url'] = $url;
 375                                 $parms['issued-id'] = $issued_id;
 376                                 $photo = $parms["photo"];
 377
 378                                 DBM::esc_array($parms);
 379                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 380                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 381                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 382                                         intval($uid),
 383                                         dbesc(datetime_convert()),
 384                                         $parms['url'],
 385                                         dbesc(normalise_link($url)),
 386                                         $parms['addr'],
 387                                         $parms['fn'],
 388                                         $parms['nick'],
 389                                         $parms['issued-id'],
 390                                         $parms['photo'],
 391                                         $parms['key'],
 392                                         $parms['dfrn-request'],
 393                                         $parms['dfrn-confirm'],
 394                                         $parms['dfrn-notify'],
 395                                         $parms['dfrn-poll'],
 396                                         $parms['dfrn-poco'],
 397                                         dbesc(NETWORK_DFRN),
 398                                         intval($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                                                 $parms['issued-id']
 409                                         );
 410                                         if (DBM::is_result($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                         $hash = random_string() . (string) time();   // Generate a confirm_key
 422
 423                         if (is_array($contact_record)) {
 424                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 425                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 426                                         intval($uid),
 427                                         intval($contact_record['id']),
 428                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 429                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 430                                         dbesc($hash),
 431                                         dbesc(datetime_convert())
 432                                 );
 433                         }
 434
 435                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 436                         if (!$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(System::baseUrl() . '/profile/' . $nickname);
 442                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 443
 444                         goaway($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 $network === NETWORK_DFRN
 451                 } elseif (($network != NETWORK_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 == NETWORK_DIASPORA) {
 459                                 $uri = $nickname . '@' . $a->get_hostname();
 460
 461                                 if ($a->get_path()) {
 462                                         $uri .= '/' . $a->get_path();
 463                                 }
 464
 465                                 $uri = urlencode($uri);
 466                         } else {
 467                                 $uri = System::baseUrl() . '/profile/' . $nickname;
 468                         }
 469
 470                         $url = str_replace('{uri}', $uri, $url);
 471                         goaway($url);
 472                         // NOTREACHED
 473                         // END $network != NETWORK_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) || (!count($a->profile))) {
 484                 return "";
 485         }
 486
 487         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 488         // to send us to the post section to record the introduction.
 489         if (x($_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                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 504                 $aes_allow = x($_GET, 'aes_allow') && $_GET['aes_allow'] == 1 ? 1 : 0;
 505                 $confirm_key = x($_GET, 'confirm_key') ? $_GET['confirm_key'] : "";
 506
 507                 // Checking fastlane for validity
 508                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($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                         killme();
 518                         return; // NOTREACHED
 519                 }
 520
 521                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 522                 $o = replace_macros($tpl, [
 523                         '$dfrn_url' => $dfrn_url,
 524                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 525                         '$hidethem' => L10n::t('Hide this contact'),
 526                         '$hidechecked' => '',
 527                         '$confirm_key' => $confirm_key,
 528                         '$welcome' => L10n::t('Welcome home %s.', $a->user['username']),
 529                         '$please' => L10n::t('Please confirm your introduction/connection request to %s.', $dfrn_url),
 530                         '$submit' => L10n::t('Confirm'),
 531                         '$uid' => $_SESSION['uid'],
 532                         '$nickname' => $a->user['nickname'],
 533                         'dfrn_rawurl' => $_GET['dfrn_url']
 534                 ]);
 535                 return $o;
 536         } elseif ((x($_GET, 'confirm_key')) && strlen($_GET['confirm_key'])) {
 537                 // we are the requestee and it is now safe to send our user their introduction,
 538                 // We could just unblock it, but first we have to jump through a few hoops to
 539                 // send an email, or even to find out if we need to send an email.
 540                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 541                         dbesc($_GET['confirm_key'])
 542                 );
 543
 544                 if (DBM::is_result($intro)) {
 545                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 546                                 WHERE `contact`.`id` = %d LIMIT 1",
 547                                 intval($intro[0]['contact-id'])
 548                         );
 549
 550                         $auto_confirm = false;
 551
 552                         if (DBM::is_result($r)) {
 553                                 if ($r[0]['page-flags'] != PAGE_NORMAL && $r[0]['page-flags'] != PAGE_PRVGROUP) {
 554                                         $auto_confirm = true;
 555                                 }
 556
 557                                 if (!$auto_confirm) {
 558                                         notification([
 559                                                 'type'         => NOTIFY_INTRO,
 560                                                 'notify_flags' => $r[0]['notify-flags'],
 561                                                 'language'     => $r[0]['language'],
 562                                                 'to_name'      => $r[0]['username'],
 563                                                 'to_email'     => $r[0]['email'],
 564                                                 'uid'          => $r[0]['uid'],
 565                                                 'link'         => System::baseUrl() . '/notifications/intros',
 566                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : L10n::t('[Name Withheld]')),
 567                                                 'source_link'  => $r[0]['url'],
 568                                                 'source_photo' => $r[0]['photo'],
 569                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 570                                                 'otype'        => 'intro'
 571                                         ]);
 572                                 }
 573
 574                                 if ($auto_confirm) {
 575                                         require_once 'mod/dfrn_confirm.php';
 576                                         $handsfree = [
 577                                                 'uid'      => $r[0]['uid'],
 578                                                 'node'     => $r[0]['nickname'],
 579                                                 'dfrn_id'  => $r[0]['issued-id'],
 580                                                 'intro_id' => $intro[0]['id'],
 581                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 582                                                 'activity' => intval(PConfig::get($r[0]['uid'], 'system', 'post_newfriend'))
 583                                         ];
 584                                         dfrn_confirm_post($a, $handsfree);
 585                                 }
 586                         }
 587
 588                         if (!$auto_confirm) {
 589
 590                                 // If we are auto_confirming, this record will have already been nuked
 591                                 // in dfrn_confirm_post()
 592
 593                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 594                                         dbesc($_GET['confirm_key'])
 595                                 );
 596                         }
 597                 }
 598
 599                 killme();
 600                 return; // NOTREACHED
 601         } else {
 602                 // Normal web request. Display our user's introduction form.
 603                 if ((Config::get('system', 'block_public')) && (!local_user()) && (!remote_user())) {
 604                         if (!Config::get('system', 'local_block')) {
 605                                 notice(L10n::t('Public access denied.') . EOL);
 606                                 return;
 607                         }
 608                 }
 609
 610                 // Try to auto-fill the profile address
 611                 // At first look if an address was provided
 612                 // Otherwise take the local address
 613                 if (x($_GET, 'addr') && ($_GET['addr'] != "")) {
 614                         $myaddr = hex2bin($_GET['addr']);
 615                 } elseif (x($_GET, 'address') && ($_GET['address'] != "")) {
 616                         $myaddr = $_GET['address'];
 617                 } elseif (local_user()) {
 618                         if (strlen($a->path)) {
 619                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 620                         } else {
 621                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 622                         }
 623                 } else {
 624                         // last, try a zrl
 625                         $myaddr = Profile::getMyURL();
 626                 }
 627
 628                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 629
 630                 /* The auto_request form only has the profile address
 631                  * because nobody is going to read the comments and
 632                  * it doesn't matter if they know you or not.
 633                  */
 634                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 635                         $tpl = get_markup_template('dfrn_request.tpl');
 636                 } else {
 637                         $tpl = get_markup_template('auto_request.tpl');
 638                 }
 639
 640                 $page_desc = L10n::t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 641
 642                 $invite_desc = sprintf(
 643                         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>.'),
 644                         get_server() . '/servers'
 645                 );
 646
 647                 $o = replace_macros($tpl, [
 648                         '$header' => L10n::t('Friend/Connection Request'),
 649                         '$desc' => L10n::t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@gnusocial.de'),
 650                         '$pls_answer' => L10n::t('Please answer the following:'),
 651                         '$does_know_you' => ['knowyou', L10n::t('Does %s know you?', $a->profile['name']), false, '', [L10n::t('No'), L10n::t('Yes')]],
 652                         '$add_note' => L10n::t('Add a personal note:'),
 653                         '$page_desc' => $page_desc,
 654                         '$friendica' => L10n::t('Friendica'),
 655                         '$statusnet' => L10n::t("GNU Social \x28Pleroma, Mastodon\x29"),
 656                         '$diaspora' => L10n::t("Diaspora \x28Socialhome, Hubzilla\x29"),
 657                         '$diasnote' => L10n::t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.', $target_addr),
 658                         '$your_address' => L10n::t('Your Identity Address:'),
 659                         '$invite_desc' => $invite_desc,
 660                         '$submit' => L10n::t('Submit Request'),
 661                         '$cancel' => L10n::t('Cancel'),
 662                         '$nickname' => $a->argv[1],
 663                         '$name' => $a->profile['name'],
 664                         '$myaddr' => $myaddr
 665                 ]);
 666                 return $o;
 667         }
 668
 669         return; // Somebody is fishing.
 670 }