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
  27 require_once 'include/enotify.php';
  28
  29 function dfrn_request_init(App $a)
  30 {
  31         if ($a->argc > 1) {
  32                 $which = $a->argv[1];
  33         }
  34
  35         Profile::load($a, $which);
  36         return;
  37 }
  38
  39 /**
  40  * Function: dfrn_request_post
  41  *
  42  * Purpose:
  43  * Handles multiple scenarios.
  44  *
  45  * Scenario 1:
  46  * Clicking 'submit' on a friend request page.
  47  *
  48  * Scenario 2:
  49  * Following Scenario 1, we are brought back to our home site
  50  * in order to link our friend request with our own server cell.
  51  * After logging in, we click 'submit' to approve the linkage.
  52  *
  53  */
  54 function dfrn_request_post(App $a)
  55 {
  56         if (($a->argc != 2) || (!count($a->profile))) {
  57                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  58                 return;
  59         }
  60
  61         if (x($_POST, 'cancel')) {
  62                 goaway(System::baseUrl());
  63         }
  64
  65         /*
  66          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  67          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  68          * That brings us here:
  69          */
  70         if ((x($_POST, 'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  71                 // Ensure this is a valid request
  72                 if (local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST, 'dfrn_url'))) {
  73                         $dfrn_url = notags(trim($_POST['dfrn_url']));
  74                         $aes_allow = (((x($_POST, 'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  75                         $confirm_key = ((x($_POST, 'confirm_key')) ? $_POST['confirm_key'] : "");
  76                         $hidden = ((x($_POST, 'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  77                         $contact_record = null;
  78                         $blocked = 1;
  79                         $pending = 1;
  80
  81                         if (x($dfrn_url)) {
  82                                 // Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  83                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  84                                         intval(local_user()),
  85                                         dbesc(normalise_link($dfrn_url))
  86                                 );
  87
  88                                 if (DBM::is_result($r)) {
  89                                         if (strlen($r[0]['dfrn-id'])) {
  90                                                 // We don't need to be here. It has already happened.
  91                                                 notice(L10n::t("This introduction has already been accepted.") . EOL);
  92                                                 return;
  93                                         } else {
  94                                                 $contact_record = $r[0];
  95                                         }
  96                                 }
  97
  98                                 if (is_array($contact_record)) {
  99                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 100                                                 intval($aes_allow),
 101                                                 intval($hidden),
 102                                                 intval($contact_record['id'])
 103                                         );
 104                                 } else {
 105                                         // Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 106                                         $parms = Probe::profile($dfrn_url);
 107
 108                                         if (!count($parms)) {
 109                                                 notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 110                                                 return;
 111                                         } else {
 112                                                 if (!x($parms, 'fn')) {
 113                                                         notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 114                                                 }
 115                                                 if (!x($parms, 'photo')) {
 116                                                         notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 117                                                 }
 118                                                 $invalid = Probe::validDfrn($parms);
 119                                                 if ($invalid) {
 120                                                         notice(sprintf(L10n::tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid), $invalid) . EOL);
 121                                                         return;
 122                                                 }
 123                                         }
 124
 125                                         $dfrn_request = $parms['dfrn-request'];
 126
 127                                         $photo = $parms["photo"];
 128
 129                                         // Escape the entire array
 130                                         DBM::esc_array($parms);
 131
 132                                         // Create a contact record on our site for the other person
 133                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 134                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 135                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 136                                                 intval(local_user()),
 137                                                 datetime_convert(),
 138                                                 dbesc($dfrn_url),
 139                                                 dbesc(normalise_link($dfrn_url)),
 140                                                 $parms['addr'],
 141                                                 $parms['fn'],
 142                                                 $parms['nick'],
 143                                                 $parms['photo'],
 144                                                 $parms['key'],
 145                                                 $parms['dfrn-request'],
 146                                                 $parms['dfrn-confirm'],
 147                                                 $parms['dfrn-notify'],
 148                                                 $parms['dfrn-poll'],
 149                                                 $parms['dfrn-poco'],
 150                                                 dbesc(NETWORK_DFRN),
 151                                                 intval($aes_allow),
 152                                                 intval($hidden),
 153                                                 intval($blocked),
 154                                                 intval($pending)
 155                                         );
 156                                 }
 157
 158                                 if ($r) {
 159                                         info(L10n::t("Introduction complete.") . EOL);
 160                                 }
 161
 162                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 163                                         intval(local_user()),
 164                                         dbesc($dfrn_url),
 165                                         $parms['key'] // this was already escaped
 166                                 );
 167                                 if (DBM::is_result($r)) {
 168                                         Group::addMember(User::getDefaultGroup($uid, $r[0]["network"]), $r[0]['id']);
 169
 170                                         if (isset($photo)) {
 171                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 172                                         }
 173
 174                                         $forwardurl = System::baseUrl() . "/contacts/" . $r[0]['id'];
 175                                 } else {
 176                                         $forwardurl = System::baseUrl() . "/contacts";
 177                                 }
 178
 179                                 // Allow the blocked remote notification to complete
 180                                 if (is_array($contact_record)) {
 181                                         $dfrn_request = $contact_record['request'];
 182                                 }
 183
 184                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 185                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 186                                 }
 187
 188                                 // (ignore reply, nothing we can do it failed)
 189                                 // Old: goaway(Profile::zrl($dfrn_url));
 190                                 goaway($forwardurl);
 191                                 return; // NOTREACHED
 192                         }
 193                 }
 194
 195                 // invalid/bogus request
 196                 notice(L10n::t('Unrecoverable protocol error.') . EOL);
 197                 goaway(System::baseUrl());
 198                 return; // NOTREACHED
 199         }
 200
 201         /*
 202          * Otherwise:
 203          *
 204          * Scenario 1:
 205          * We are the requestee. A person from a remote cell has made an introduction
 206          * on our profile web page and clicked submit. We will use their DFRN-URL to
 207          * figure out how to contact their cell.
 208          *
 209          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 210          * and an introduction to show our user next time he/she logs in.
 211          * Finally redirect back to the requestor so that their site can record the request.
 212          * If our user (the requestee) later confirms this request, a record of it will need
 213          * to exist on the requestor's cell in order for the confirmation process to complete..
 214          *
 215          * It's possible that neither the requestor or the requestee are logged in at the moment,
 216          * and the requestor does not yet have any credentials to the requestee profile.
 217          *
 218          * Who is the requestee? We've already loaded their profile which means their nickname should be
 219          * in $a->argv[1] and we should have their complete info in $a->profile.
 220          *
 221          */
 222         if (!(is_array($a->profile) && count($a->profile))) {
 223                 notice(L10n::t('Profile unavailable.') . EOL);
 224                 return;
 225         }
 226
 227         $nickname       = $a->profile['nickname'];
 228         $notify_flags   = $a->profile['notify-flags'];
 229         $uid            = $a->profile['uid'];
 230         $maxreq         = intval($a->profile['maxreq']);
 231         $contact_record = null;
 232         $failed         = false;
 233         $parms          = null;
 234         $blocked = 1;
 235         $pending = 1;
 236
 237         if (x($_POST, 'dfrn_url')) {
 238                 // Block friend request spam
 239                 if ($maxreq) {
 240                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 241                                 dbesc(datetime_convert('UTC', 'UTC', 'now - 24 hours')),
 242                                 intval($uid)
 243                         );
 244                         if (DBM::is_result($r) && count($r) > $maxreq) {
 245                                 notice(sprintf(L10n::t('%s has received too many connection requests today.'), $a->profile['name']) . EOL);
 246                                 notice(L10n::t('Spam protection measures have been invoked.') . EOL);
 247                                 notice(L10n::t('Friends are advised to please try again in 24 hours.') . EOL);
 248                                 return;
 249                         }
 250                 }
 251
 252                 /* Cleanup old introductions that remain blocked.
 253                  * Also remove the contact record, but only if there is no existing relationship
 254                  */
 255                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 256                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 257                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 258                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
 259                 );
 260                 if (DBM::is_result($r)) {
 261                         foreach ($r as $rr) {
 262                                 if (!$rr['rel']) {
 263                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 264                                                 intval($rr['cid'])
 265                                         );
 266                                 }
 267                                 q("DELETE FROM `intro` WHERE `id` = %d",
 268                                         intval($rr['iid'])
 269                                 );
 270                         }
 271                 }
 272
 273                 $real_name = x($_POST, 'realname') ? notags(trim($_POST['realname'])) : '';
 274
 275                 $url = trim($_POST['dfrn_url']);
 276                 if (!strlen($url)) {
 277                         notice(L10n::t("Invalid locator") . EOL);
 278                         return;
 279                 }
 280
 281                 $hcard = '';
 282
 283                 // Detect the network
 284                 $data = Probe::uri($url);
 285                 $network = $data["network"];
 286
 287                 // Canonicalise email-style profile locator
 288                 $url = Probe::webfingerDfrn($url, $hcard);
 289
 290                 if (substr($url, 0, 5) === 'stat:') {
 291                         // Every time we detect the remote subscription we define this as OStatus.
 292                         // We do this even if it is not OStatus.
 293                         // we only need to pass this through another section of the code.
 294                         if ($network != NETWORK_DIASPORA) {
 295                                 $network = NETWORK_OSTATUS;
 296                         }
 297
 298                         $url = substr($url, 5);
 299                 } else {
 300                         $network = NETWORK_DFRN;
 301                 }
 302
 303                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 304
 305                 if ($network === NETWORK_DFRN) {
 306                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 307                                 intval($uid),
 308                                 dbesc($url)
 309                         );
 310
 311                         if (DBM::is_result($ret)) {
 312                                 if (strlen($ret[0]['issued-id'])) {
 313                                         notice(L10n::t('You have already introduced yourself here.') . EOL);
 314                                         return;
 315                                 } elseif ($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 316                                         notice(sprintf(L10n::t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
 317                                         return;
 318                                 } else {
 319                                         $contact_record = $ret[0];
 320                                         $parms = ['dfrn-request' => $ret[0]['request']];
 321                                 }
 322                         }
 323
 324                         $issued_id = random_string();
 325
 326                         if (is_array($contact_record)) {
 327                                 // There is a contact record but no issued-id, so this
 328                                 // is a reciprocal introduction from a known contact
 329                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 330                                         dbesc($issued_id),
 331                                         intval($contact_record['id'])
 332                                 );
 333                         } else {
 334                                 $url = validate_url($url);
 335                                 if (!$url) {
 336                                         notice(L10n::t('Invalid profile URL.') . EOL);
 337                                         goaway(System::baseUrl() . '/' . $a->cmd);
 338                                         return; // NOTREACHED
 339                                 }
 340
 341                                 if (!allowed_url($url)) {
 342                                         notice(L10n::t('Disallowed profile URL.') . EOL);
 343                                         goaway(System::baseUrl() . '/' . $a->cmd);
 344                                         return; // NOTREACHED
 345                                 }
 346
 347                                 if (blocked_url($url)) {
 348                                         notice(L10n::t('Blocked domain') . EOL);
 349                                         goaway(System::baseUrl() . '/' . $a->cmd);
 350                                         return; // NOTREACHED
 351                                 }
 352
 353                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 354
 355                                 if (!count($parms)) {
 356                                         notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 357                                         goaway(System::baseUrl() . '/' . $a->cmd);
 358                                 } else {
 359                                         if (!x($parms, 'fn')) {
 360                                                 notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 361                                         }
 362                                         if (!x($parms, 'photo')) {
 363                                                 notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 364                                         }
 365                                         $invalid = Probe::validDfrn($parms);
 366                                         if ($invalid) {
 367                                                 notice(sprintf(L10n::tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid), $invalid) . EOL);
 368
 369                                                 return;
 370                                         }
 371                                 }
 372
 373                                 $parms['url'] = $url;
 374                                 $parms['issued-id'] = $issued_id;
 375                                 $photo = $parms["photo"];
 376
 377                                 DBM::esc_array($parms);
 378                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 379                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 380                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 381                                         intval($uid),
 382                                         dbesc(datetime_convert()),
 383                                         $parms['url'],
 384                                         dbesc(normalise_link($url)),
 385                                         $parms['addr'],
 386                                         $parms['fn'],
 387                                         $parms['nick'],
 388                                         $parms['issued-id'],
 389                                         $parms['photo'],
 390                                         $parms['key'],
 391                                         $parms['dfrn-request'],
 392                                         $parms['dfrn-confirm'],
 393                                         $parms['dfrn-notify'],
 394                                         $parms['dfrn-poll'],
 395                                         $parms['dfrn-poco'],
 396                                         dbesc(NETWORK_DFRN),
 397                                         intval($blocked),
 398                                         intval($pending)
 399                                 );
 400
 401                                 // find the contact record we just created
 402                                 if ($r) {
 403                                         $r = q("SELECT `id` FROM `contact`
 404                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 405                                                 intval($uid),
 406                                                 $parms['url'],
 407                                                 $parms['issued-id']
 408                                         );
 409                                         if (DBM::is_result($r)) {
 410                                                 $contact_record = $r[0];
 411                                                 Contact::updateAvatar($photo, $uid, $contact_record["id"], true);
 412                                         }
 413                                 }
 414                         }
 415                         if ($r === false) {
 416                                 notice(L10n::t('Failed to update contact record.') . EOL);
 417                                 return;
 418                         }
 419
 420                         $hash = random_string() . (string) time();   // Generate a confirm_key
 421
 422                         if (is_array($contact_record)) {
 423                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 424                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 425                                         intval($uid),
 426                                         intval($contact_record['id']),
 427                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 428                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 429                                         dbesc($hash),
 430                                         dbesc(datetime_convert())
 431                                 );
 432                         }
 433
 434                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 435                         if (!$failed) {
 436                                 info(L10n::t('Your introduction has been sent.') . EOL);
 437                         }
 438
 439                         // "Homecoming" - send the requestor back to their site to record the introduction.
 440                         $dfrn_url = bin2hex(System::baseUrl() . '/profile/' . $nickname);
 441                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 442
 443                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 444                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 445                                 . '&confirm_key=' . $hash
 446                                 . (($aes_allow) ? "&aes_allow=1" : "")
 447                         );
 448                         // NOTREACHED
 449                         // END $network === NETWORK_DFRN
 450                 } elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 451
 452                         /* Substitute our user's feed URL into $url template
 453                          * Send the subscriber home to subscribe
 454                          */
 455                         // Diaspora needs the uri in the format user@domain.tld
 456                         // Diaspora will support the remote subscription in a future version
 457                         if ($network == NETWORK_DIASPORA) {
 458                                 $uri = $nickname . '@' . $a->get_hostname();
 459
 460                                 if ($a->get_path()) {
 461                                         $uri .= '/' . $a->get_path();
 462                                 }
 463
 464                                 $uri = urlencode($uri);
 465                         } else {
 466                                 $uri = System::baseUrl() . '/profile/' . $nickname;
 467                         }
 468
 469                         $url = str_replace('{uri}', $uri, $url);
 470                         goaway($url);
 471                         // NOTREACHED
 472                         // END $network != NETWORK_PHANTOM
 473                 } else {
 474                         notice(L10n::t("Remote subscription can't be done for your network. Please subscribe directly on your system.") . EOL);
 475                         return;
 476                 }
 477         } return;
 478 }
 479
 480 function dfrn_request_content(App $a)
 481 {
 482         if (($a->argc != 2) || (!count($a->profile))) {
 483                 return "";
 484         }
 485
 486         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 487         // to send us to the post section to record the introduction.
 488         if (x($_GET, 'dfrn_url')) {
 489                 if (!local_user()) {
 490                         info(L10n::t("Please login to confirm introduction.") . EOL);
 491                         /* setup the return URL to come back to this page if they use openid */
 492                         return Login::form();
 493                 }
 494
 495                 // Edge case, but can easily happen in the wild. This person is authenticated,
 496                 // but not as the person who needs to deal with this request.
 497                 if ($a->user['nickname'] != $a->argv[1]) {
 498                         notice(L10n::t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 499                         return Login::form();
 500                 }
 501
 502                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 503                 $aes_allow = x($_GET, 'aes_allow') && $_GET['aes_allow'] == 1 ? 1 : 0;
 504                 $confirm_key = x($_GET, 'confirm_key') ? $_GET['confirm_key'] : "";
 505
 506                 // Checking fastlane for validity
 507                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 508                         $_POST["dfrn_url"] = $dfrn_url;
 509                         $_POST["confirm_key"] = $confirm_key;
 510                         $_POST["localconfirm"] = 1;
 511                         $_POST["hidden-contact"] = 0;
 512                         $_POST["submit"] = L10n::t('Confirm');
 513
 514                         dfrn_request_post($a);
 515
 516                         killme();
 517                         return; // NOTREACHED
 518                 }
 519
 520                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 521                 $o = replace_macros($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                         '$hidechecked' => '',
 526                         '$confirm_key' => $confirm_key,
 527                         '$welcome' => sprintf(L10n::t('Welcome home %s.'), $a->user['username']),
 528                         '$please' => sprintf(L10n::t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
 529                         '$submit' => L10n::t('Confirm'),
 530                         '$uid' => $_SESSION['uid'],
 531                         '$nickname' => $a->user['nickname'],
 532                         'dfrn_rawurl' => $_GET['dfrn_url']
 533                 ]);
 534                 return $o;
 535         } elseif ((x($_GET, 'confirm_key')) && strlen($_GET['confirm_key'])) {
 536                 // we are the requestee and it is now safe to send our user their introduction,
 537                 // We could just unblock it, but first we have to jump through a few hoops to
 538                 // send an email, or even to find out if we need to send an email.
 539                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 540                         dbesc($_GET['confirm_key'])
 541                 );
 542
 543                 if (DBM::is_result($intro)) {
 544                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 545                                 WHERE `contact`.`id` = %d LIMIT 1",
 546                                 intval($intro[0]['contact-id'])
 547                         );
 548
 549                         $auto_confirm = false;
 550
 551                         if (DBM::is_result($r)) {
 552                                 if ($r[0]['page-flags'] != PAGE_NORMAL && $r[0]['page-flags'] != PAGE_PRVGROUP) {
 553                                         $auto_confirm = true;
 554                                 }
 555
 556                                 if (!$auto_confirm) {
 557                                         notification([
 558                                                 'type'         => NOTIFY_INTRO,
 559                                                 'notify_flags' => $r[0]['notify-flags'],
 560                                                 'language'     => $r[0]['language'],
 561                                                 'to_name'      => $r[0]['username'],
 562                                                 'to_email'     => $r[0]['email'],
 563                                                 'uid'          => $r[0]['uid'],
 564                                                 'link'         => System::baseUrl() . '/notifications/intros',
 565                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : L10n::t('[Name Withheld]')),
 566                                                 'source_link'  => $r[0]['url'],
 567                                                 'source_photo' => $r[0]['photo'],
 568                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 569                                                 'otype'        => 'intro'
 570                                         ]);
 571                                 }
 572
 573                                 if ($auto_confirm) {
 574                                         require_once 'mod/dfrn_confirm.php';
 575                                         $handsfree = [
 576                                                 'uid'      => $r[0]['uid'],
 577                                                 'node'     => $r[0]['nickname'],
 578                                                 'dfrn_id'  => $r[0]['issued-id'],
 579                                                 'intro_id' => $intro[0]['id'],
 580                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 581                                                 'activity' => intval(PConfig::get($r[0]['uid'], 'system', 'post_newfriend'))
 582                                         ];
 583                                         dfrn_confirm_post($a, $handsfree);
 584                                 }
 585                         }
 586
 587                         if (!$auto_confirm) {
 588
 589                                 // If we are auto_confirming, this record will have already been nuked
 590                                 // in dfrn_confirm_post()
 591
 592                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 593                                         dbesc($_GET['confirm_key'])
 594                                 );
 595                         }
 596                 }
 597
 598                 killme();
 599                 return; // NOTREACHED
 600         } else {
 601                 // Normal web request. Display our user's introduction form.
 602                 if ((Config::get('system', 'block_public')) && (!local_user()) && (!remote_user())) {
 603                         if (!Config::get('system', 'local_block')) {
 604                                 notice(L10n::t('Public access denied.') . EOL);
 605                                 return;
 606                         }
 607                 }
 608
 609                 // Try to auto-fill the profile address
 610                 // At first look if an address was provided
 611                 // Otherwise take the local address
 612                 if (x($_GET, 'addr') && ($_GET['addr'] != "")) {
 613                         $myaddr = hex2bin($_GET['addr']);
 614                 } elseif (x($_GET, 'address') && ($_GET['address'] != "")) {
 615                         $myaddr = $_GET['address'];
 616                 } elseif (local_user()) {
 617                         if (strlen($a->path)) {
 618                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 619                         } else {
 620                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 621                         }
 622                 } else {
 623                         // last, try a zrl
 624                         $myaddr = Profile::getMyURL();
 625                 }
 626
 627                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 628
 629                 /* The auto_request form only has the profile address
 630                  * because nobody is going to read the comments and
 631                  * it doesn't matter if they know you or not.
 632                  */
 633                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 634                         $tpl = get_markup_template('dfrn_request.tpl');
 635                 } else {
 636                         $tpl = get_markup_template('auto_request.tpl');
 637                 }
 638
 639                 $page_desc = L10n::t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 640
 641                 $invite_desc = sprintf(
 642                         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>.'),
 643                         get_server() . '/servers'
 644                 );
 645
 646                 $o = replace_macros($tpl, [
 647                         '$header' => L10n::t('Friend/Connection Request'),
 648                         '$desc' => L10n::t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@gnusocial.de'),
 649                         '$pls_answer' => L10n::t('Please answer the following:'),
 650                         '$does_know_you' => ['knowyou', sprintf(L10n::t('Does %s know you?'), $a->profile['name']), false, '', [L10n::t('No'), L10n::t('Yes')]],
 651                         '$add_note' => L10n::t('Add a personal note:'),
 652                         '$page_desc' => $page_desc,
 653                         '$friendica' => L10n::t('Friendica'),
 654                         '$statusnet' => L10n::t('GNU Social (Pleroma, Mastodon)'),
 655                         '$diaspora' => L10n::t('Diaspora (Socialhome, Hubzilla)'),
 656                         '$diasnote' => sprintf(L10n::t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.'), $target_addr),
 657                         '$your_address' => L10n::t('Your Identity Address:'),
 658                         '$invite_desc' => $invite_desc,
 659                         '$submit' => L10n::t('Submit Request'),
 660                         '$cancel' => L10n::t('Cancel'),
 661                         '$nickname' => $a->argv[1],
 662                         '$name' => $a->profile['name'],
 663                         '$myaddr' => $myaddr
 664                 ]);
 665                 return $o;
 666         }
 667
 668         return; // Somebody is fishing.
 669 }