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\PConfig;
  19 use Friendica\Core\System;
  20 use Friendica\Database\DBM;
  21 use Friendica\Model\Contact;
  22 use Friendica\Model\Group;
  23 use Friendica\Model\Profile;
  24 use Friendica\Model\User;
  25 use Friendica\Module\Login;
  26 use Friendica\Network\Probe;
  27 use Friendica\Util\DateTimeFormat;
  28 use Friendica\Util\Network;
  29
  30 require_once 'include/enotify.php';
  31
  32 function dfrn_request_init(App $a)
  33 {
  34         if ($a->argc > 1) {
  35                 $which = $a->argv[1];
  36         }
  37
  38         Profile::load($a, $which);
  39         return;
  40 }
  41
  42 /**
  43  * Function: dfrn_request_post
  44  *
  45  * Purpose:
  46  * Handles multiple scenarios.
  47  *
  48  * Scenario 1:
  49  * Clicking 'submit' on a friend request page.
  50  *
  51  * Scenario 2:
  52  * Following Scenario 1, we are brought back to our home site
  53  * in order to link our friend request with our own server cell.
  54  * After logging in, we click 'submit' to approve the linkage.
  55  *
  56  */
  57 function dfrn_request_post(App $a)
  58 {
  59         if (($a->argc != 2) || (!count($a->profile))) {
  60                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  61                 return;
  62         }
  63
  64         if (x($_POST, 'cancel')) {
  65                 goaway(System::baseUrl());
  66         }
  67
  68         /*
  69          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  70          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  71          * That brings us here:
  72          */
  73         if ((x($_POST, 'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  74                 // Ensure this is a valid request
  75                 if (local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST, 'dfrn_url'))) {
  76                         $dfrn_url = notags(trim($_POST['dfrn_url']));
  77                         $aes_allow = (((x($_POST, 'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  78                         $confirm_key = ((x($_POST, 'confirm_key')) ? $_POST['confirm_key'] : "");
  79                         $hidden = ((x($_POST, 'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  80                         $contact_record = null;
  81                         $blocked = 1;
  82                         $pending = 1;
  83
  84                         if (x($dfrn_url)) {
  85                                 // Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  86                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  87                                         intval(local_user()),
  88                                         dbesc(normalise_link($dfrn_url))
  89                                 );
  90
  91                                 if (DBM::is_result($r)) {
  92                                         if (strlen($r[0]['dfrn-id'])) {
  93                                                 // We don't need to be here. It has already happened.
  94                                                 notice(L10n::t("This introduction has already been accepted.") . EOL);
  95                                                 return;
  96                                         } else {
  97                                                 $contact_record = $r[0];
  98                                         }
  99                                 }
 100
 101                                 if (is_array($contact_record)) {
 102                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 103                                                 intval($aes_allow),
 104                                                 intval($hidden),
 105                                                 intval($contact_record['id'])
 106                                         );
 107                                 } else {
 108                                         // Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 109                                         $parms = Probe::profile($dfrn_url);
 110
 111                                         if (!count($parms)) {
 112                                                 notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 113                                                 return;
 114                                         } else {
 115                                                 if (!x($parms, 'fn')) {
 116                                                         notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 117                                                 }
 118                                                 if (!x($parms, 'photo')) {
 119                                                         notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 120                                                 }
 121                                                 $invalid = Probe::validDfrn($parms);
 122                                                 if ($invalid) {
 123                                                         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);
 124                                                         return;
 125                                                 }
 126                                         }
 127
 128                                         $dfrn_request = $parms['dfrn-request'];
 129
 130                                         $photo = $parms["photo"];
 131
 132                                         // Escape the entire array
 133                                         DBM::esc_array($parms);
 134
 135                                         // Create a contact record on our site for the other person
 136                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 137                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 138                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 139                                                 intval(local_user()),
 140                                                 DateTimeFormat::utcNow(),
 141                                                 dbesc($dfrn_url),
 142                                                 dbesc(normalise_link($dfrn_url)),
 143                                                 $parms['addr'],
 144                                                 $parms['fn'],
 145                                                 $parms['nick'],
 146                                                 $parms['photo'],
 147                                                 $parms['key'],
 148                                                 $parms['dfrn-request'],
 149                                                 $parms['dfrn-confirm'],
 150                                                 $parms['dfrn-notify'],
 151                                                 $parms['dfrn-poll'],
 152                                                 $parms['dfrn-poco'],
 153                                                 dbesc(NETWORK_DFRN),
 154                                                 intval($aes_allow),
 155                                                 intval($hidden),
 156                                                 intval($blocked),
 157                                                 intval($pending)
 158                                         );
 159                                 }
 160
 161                                 if ($r) {
 162                                         info(L10n::t("Introduction complete.") . EOL);
 163                                 }
 164
 165                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 166                                         intval(local_user()),
 167                                         dbesc($dfrn_url),
 168                                         $parms['key'] // this was already escaped
 169                                 );
 170                                 if (DBM::is_result($r)) {
 171                                         Group::addMember(User::getDefaultGroup(local_user(), $r[0]["network"]), $r[0]['id']);
 172
 173                                         if (isset($photo)) {
 174                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 175                                         }
 176
 177                                         $forwardurl = System::baseUrl() . "/contacts/" . $r[0]['id'];
 178                                 } else {
 179                                         $forwardurl = System::baseUrl() . "/contacts";
 180                                 }
 181
 182                                 // Allow the blocked remote notification to complete
 183                                 if (is_array($contact_record)) {
 184                                         $dfrn_request = $contact_record['request'];
 185                                 }
 186
 187                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 188                                         $s = Network::fetchUrl($dfrn_request . '?confirm_key=' . $confirm_key);
 189                                 }
 190
 191                                 // (ignore reply, nothing we can do it failed)
 192                                 goaway($forwardurl);
 193                                 return; // NOTREACHED
 194                         }
 195                 }
 196
 197                 // invalid/bogus request
 198                 notice(L10n::t('Unrecoverable protocol error.') . EOL);
 199                 goaway(System::baseUrl());
 200                 return; // NOTREACHED
 201         }
 202
 203         /*
 204          * Otherwise:
 205          *
 206          * Scenario 1:
 207          * We are the requestee. A person from a remote cell has made an introduction
 208          * on our profile web page and clicked submit. We will use their DFRN-URL to
 209          * figure out how to contact their cell.
 210          *
 211          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 212          * and an introduction to show our user next time he/she logs in.
 213          * Finally redirect back to the requestor so that their site can record the request.
 214          * If our user (the requestee) later confirms this request, a record of it will need
 215          * to exist on the requestor's cell in order for the confirmation process to complete..
 216          *
 217          * It's possible that neither the requestor or the requestee are logged in at the moment,
 218          * and the requestor does not yet have any credentials to the requestee profile.
 219          *
 220          * Who is the requestee? We've already loaded their profile which means their nickname should be
 221          * in $a->argv[1] and we should have their complete info in $a->profile.
 222          *
 223          */
 224         if (!(is_array($a->profile) && count($a->profile))) {
 225                 notice(L10n::t('Profile unavailable.') . EOL);
 226                 return;
 227         }
 228
 229         $nickname       = $a->profile['nickname'];
 230         $notify_flags   = $a->profile['notify-flags'];
 231         $uid            = $a->profile['uid'];
 232         $maxreq         = intval($a->profile['maxreq']);
 233         $contact_record = null;
 234         $failed         = false;
 235         $parms          = null;
 236         $blocked = 1;
 237         $pending = 1;
 238
 239         if (x($_POST, 'dfrn_url')) {
 240                 // Block friend request spam
 241                 if ($maxreq) {
 242                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 243                                 dbesc(DateTimeFormat::utc('now - 24 hours')),
 244                                 intval($uid)
 245                         );
 246                         if (DBM::is_result($r) && count($r) > $maxreq) {
 247                                 notice(L10n::t('%s has received too many connection requests today.', $a->profile['name']) . EOL);
 248                                 notice(L10n::t('Spam protection measures have been invoked.') . EOL);
 249                                 notice(L10n::t('Friends are advised to please try again in 24 hours.') . EOL);
 250                                 return;
 251                         }
 252                 }
 253
 254                 /* Cleanup old introductions that remain blocked.
 255                  * Also remove the contact record, but only if there is no existing relationship
 256                  */
 257                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 258                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 259                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 260                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
 261                 );
 262                 if (DBM::is_result($r)) {
 263                         foreach ($r as $rr) {
 264                                 if (!$rr['rel']) {
 265                                         dba::delete('contact', ['id' => $rr['cid'], 'self' => false]);
 266                                 }
 267                                 dba::delete('intro', ['id' => $rr['iid']]);
 268                         }
 269                 }
 270
 271                 $real_name = x($_POST, 'realname') ? notags(trim($_POST['realname'])) : '';
 272
 273                 $url = trim($_POST['dfrn_url']);
 274                 if (!strlen($url)) {
 275                         notice(L10n::t("Invalid locator") . EOL);
 276                         return;
 277                 }
 278
 279                 $hcard = '';
 280
 281                 // Detect the network
 282                 $data = Probe::uri($url);
 283                 $network = $data["network"];
 284
 285                 // Canonicalise email-style profile locator
 286                 $url = Probe::webfingerDfrn($url, $hcard);
 287
 288                 if (substr($url, 0, 5) === 'stat:') {
 289                         // Every time we detect the remote subscription we define this as OStatus.
 290                         // We do this even if it is not OStatus.
 291                         // we only need to pass this through another section of the code.
 292                         if ($network != NETWORK_DIASPORA) {
 293                                 $network = NETWORK_OSTATUS;
 294                         }
 295
 296                         $url = substr($url, 5);
 297                 } else {
 298                         $network = NETWORK_DFRN;
 299                 }
 300
 301                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 302
 303                 if ($network === NETWORK_DFRN) {
 304                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 305                                 intval($uid),
 306                                 dbesc($url)
 307                         );
 308
 309                         if (DBM::is_result($ret)) {
 310                                 if (strlen($ret[0]['issued-id'])) {
 311                                         notice(L10n::t('You have already introduced yourself here.') . EOL);
 312                                         return;
 313                                 } elseif ($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 314                                         notice(L10n::t('Apparently you are already friends with %s.', $a->profile['name']) . EOL);
 315                                         return;
 316                                 } else {
 317                                         $contact_record = $ret[0];
 318                                         $parms = ['dfrn-request' => $ret[0]['request']];
 319                                 }
 320                         }
 321
 322                         $issued_id = random_string();
 323
 324                         if (is_array($contact_record)) {
 325                                 // There is a contact record but no issued-id, so this
 326                                 // is a reciprocal introduction from a known contact
 327                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 328                                         dbesc($issued_id),
 329                                         intval($contact_record['id'])
 330                                 );
 331                         } else {
 332                                 $url = Network::isUrlValid($url);
 333                                 if (!$url) {
 334                                         notice(L10n::t('Invalid profile URL.') . EOL);
 335                                         goaway(System::baseUrl() . '/' . $a->cmd);
 336                                         return; // NOTREACHED
 337                                 }
 338
 339                                 if (!Network::isUrlAllowed($url)) {
 340                                         notice(L10n::t('Disallowed profile URL.') . EOL);
 341                                         goaway(System::baseUrl() . '/' . $a->cmd);
 342                                         return; // NOTREACHED
 343                                 }
 344
 345                                 if (Network::isUrlBlocked($url)) {
 346                                         notice(L10n::t('Blocked domain') . EOL);
 347                                         goaway(System::baseUrl() . '/' . $a->cmd);
 348                                         return; // NOTREACHED
 349                                 }
 350
 351                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 352
 353                                 if (!count($parms)) {
 354                                         notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 355                                         goaway(System::baseUrl() . '/' . $a->cmd);
 356                                 } else {
 357                                         if (!x($parms, 'fn')) {
 358                                                 notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 359                                         }
 360                                         if (!x($parms, 'photo')) {
 361                                                 notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 362                                         }
 363                                         $invalid = Probe::validDfrn($parms);
 364                                         if ($invalid) {
 365                                                 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);
 366
 367                                                 return;
 368                                         }
 369                                 }
 370
 371                                 $parms['url'] = $url;
 372                                 $parms['issued-id'] = $issued_id;
 373                                 $photo = $parms["photo"];
 374
 375                                 DBM::esc_array($parms);
 376                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 377                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 378                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 379                                         intval($uid),
 380                                         dbesc(DateTimeFormat::utcNow()),
 381                                         $parms['url'],
 382                                         dbesc(normalise_link($url)),
 383                                         $parms['addr'],
 384                                         $parms['fn'],
 385                                         $parms['nick'],
 386                                         $parms['issued-id'],
 387                                         $parms['photo'],
 388                                         $parms['key'],
 389                                         $parms['dfrn-request'],
 390                                         $parms['dfrn-confirm'],
 391                                         $parms['dfrn-notify'],
 392                                         $parms['dfrn-poll'],
 393                                         $parms['dfrn-poco'],
 394                                         dbesc(NETWORK_DFRN),
 395                                         intval($blocked),
 396                                         intval($pending)
 397                                 );
 398
 399                                 // find the contact record we just created
 400                                 if ($r) {
 401                                         $r = q("SELECT `id` FROM `contact`
 402                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 403                                                 intval($uid),
 404                                                 $parms['url'],
 405                                                 $parms['issued-id']
 406                                         );
 407                                         if (DBM::is_result($r)) {
 408                                                 $contact_record = $r[0];
 409                                                 Contact::updateAvatar($photo, $uid, $contact_record["id"], true);
 410                                         }
 411                                 }
 412                         }
 413                         if ($r === false) {
 414                                 notice(L10n::t('Failed to update contact record.') . EOL);
 415                                 return;
 416                         }
 417
 418                         $hash = random_string() . (string) time();   // Generate a confirm_key
 419
 420                         if (is_array($contact_record)) {
 421                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 422                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 423                                         intval($uid),
 424                                         intval($contact_record['id']),
 425                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 426                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 427                                         dbesc($hash),
 428                                         dbesc(DateTimeFormat::utcNow())
 429                                 );
 430                         }
 431
 432                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 433                         if (!$failed) {
 434                                 info(L10n::t('Your introduction has been sent.') . EOL);
 435                         }
 436
 437                         // "Homecoming" - send the requestor back to their site to record the introduction.
 438                         $dfrn_url = bin2hex(System::baseUrl() . '/profile/' . $nickname);
 439                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 440
 441                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 442                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 443                                 . '&confirm_key=' . $hash
 444                                 . (($aes_allow) ? "&aes_allow=1" : "")
 445                         );
 446                         // NOTREACHED
 447                         // END $network === NETWORK_DFRN
 448                 } elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 449
 450                         /* Substitute our user's feed URL into $url template
 451                          * Send the subscriber home to subscribe
 452                          */
 453                         // Diaspora needs the uri in the format user@domain.tld
 454                         // Diaspora will support the remote subscription in a future version
 455                         if ($network == NETWORK_DIASPORA) {
 456                                 $uri = $nickname . '@' . $a->get_hostname();
 457
 458                                 if ($a->get_path()) {
 459                                         $uri .= '/' . $a->get_path();
 460                                 }
 461
 462                                 $uri = urlencode($uri);
 463                         } else {
 464                                 $uri = System::baseUrl() . '/profile/' . $nickname;
 465                         }
 466
 467                         $url = str_replace('{uri}', $uri, $url);
 468                         goaway($url);
 469                         // NOTREACHED
 470                         // END $network != NETWORK_PHANTOM
 471                 } else {
 472                         notice(L10n::t("Remote subscription can't be done for your network. Please subscribe directly on your system.") . EOL);
 473                         return;
 474                 }
 475         } return;
 476 }
 477
 478 function dfrn_request_content(App $a)
 479 {
 480         if (($a->argc != 2) || (!count($a->profile))) {
 481                 return "";
 482         }
 483
 484         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 485         // to send us to the post section to record the introduction.
 486         if (x($_GET, 'dfrn_url')) {
 487                 if (!local_user()) {
 488                         info(L10n::t("Please login to confirm introduction.") . EOL);
 489                         /* setup the return URL to come back to this page if they use openid */
 490                         return Login::form();
 491                 }
 492
 493                 // Edge case, but can easily happen in the wild. This person is authenticated,
 494                 // but not as the person who needs to deal with this request.
 495                 if ($a->user['nickname'] != $a->argv[1]) {
 496                         notice(L10n::t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 497                         return Login::form();
 498                 }
 499
 500                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 501                 $aes_allow = x($_GET, 'aes_allow') && $_GET['aes_allow'] == 1 ? 1 : 0;
 502                 $confirm_key = x($_GET, 'confirm_key') ? $_GET['confirm_key'] : "";
 503
 504                 // Checking fastlane for validity
 505                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 506                         $_POST["dfrn_url"] = $dfrn_url;
 507                         $_POST["confirm_key"] = $confirm_key;
 508                         $_POST["localconfirm"] = 1;
 509                         $_POST["hidden-contact"] = 0;
 510                         $_POST["submit"] = L10n::t('Confirm');
 511
 512                         dfrn_request_post($a);
 513
 514                         killme();
 515                         return; // NOTREACHED
 516                 }
 517
 518                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 519                 $o = replace_macros($tpl, [
 520                         '$dfrn_url' => $dfrn_url,
 521                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 522                         '$hidethem' => L10n::t('Hide this contact'),
 523                         '$hidechecked' => '',
 524                         '$confirm_key' => $confirm_key,
 525                         '$welcome' => L10n::t('Welcome home %s.', $a->user['username']),
 526                         '$please' => L10n::t('Please confirm your introduction/connection request to %s.', $dfrn_url),
 527                         '$submit' => L10n::t('Confirm'),
 528                         '$uid' => $_SESSION['uid'],
 529                         '$nickname' => $a->user['nickname'],
 530                         'dfrn_rawurl' => $_GET['dfrn_url']
 531                 ]);
 532                 return $o;
 533         } elseif ((x($_GET, 'confirm_key')) && strlen($_GET['confirm_key'])) {
 534                 // we are the requestee and it is now safe to send our user their introduction,
 535                 // We could just unblock it, but first we have to jump through a few hoops to
 536                 // send an email, or even to find out if we need to send an email.
 537                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 538                         dbesc($_GET['confirm_key'])
 539                 );
 540
 541                 if (DBM::is_result($intro)) {
 542                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 543                                 WHERE `contact`.`id` = %d LIMIT 1",
 544                                 intval($intro[0]['contact-id'])
 545                         );
 546
 547                         $auto_confirm = false;
 548
 549                         if (DBM::is_result($r)) {
 550                                 if ($r[0]['page-flags'] != PAGE_NORMAL && $r[0]['page-flags'] != PAGE_PRVGROUP) {
 551                                         $auto_confirm = true;
 552                                 }
 553
 554                                 if (!$auto_confirm) {
 555                                         notification([
 556                                                 'type'         => NOTIFY_INTRO,
 557                                                 'notify_flags' => $r[0]['notify-flags'],
 558                                                 'language'     => $r[0]['language'],
 559                                                 'to_name'      => $r[0]['username'],
 560                                                 'to_email'     => $r[0]['email'],
 561                                                 'uid'          => $r[0]['uid'],
 562                                                 'link'         => System::baseUrl() . '/notifications/intros',
 563                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : L10n::t('[Name Withheld]')),
 564                                                 'source_link'  => $r[0]['url'],
 565                                                 'source_photo' => $r[0]['photo'],
 566                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 567                                                 'otype'        => 'intro'
 568                                         ]);
 569                                 }
 570
 571                                 if ($auto_confirm) {
 572                                         require_once 'mod/dfrn_confirm.php';
 573                                         $handsfree = [
 574                                                 'uid'      => $r[0]['uid'],
 575                                                 'node'     => $r[0]['nickname'],
 576                                                 'dfrn_id'  => $r[0]['issued-id'],
 577                                                 'intro_id' => $intro[0]['id'],
 578                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 579                                         ];
 580                                         dfrn_confirm_post($a, $handsfree);
 581                                 }
 582                         }
 583
 584                         if (!$auto_confirm) {
 585
 586                                 // If we are auto_confirming, this record will have already been nuked
 587                                 // in dfrn_confirm_post()
 588
 589                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 590                                         dbesc($_GET['confirm_key'])
 591                                 );
 592                         }
 593                 }
 594
 595                 killme();
 596                 return; // NOTREACHED
 597         } else {
 598                 // Normal web request. Display our user's introduction form.
 599                 if ((Config::get('system', 'block_public')) && (!local_user()) && (!remote_user())) {
 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 (x($_GET, 'addr') && ($_GET['addr'] != "")) {
 610                         $myaddr = hex2bin($_GET['addr']);
 611                 } elseif (x($_GET, 'address') && ($_GET['address'] != "")) {
 612                         $myaddr = $_GET['address'];
 613                 } elseif (local_user()) {
 614                         if (strlen($a->path)) {
 615                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 616                         } else {
 617                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 618                         }
 619                 } else {
 620                         // last, try a zrl
 621                         $myaddr = Profile::getMyURL();
 622                 }
 623
 624                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 625
 626                 /* The auto_request form only has the profile address
 627                  * because nobody is going to read the comments and
 628                  * it doesn't matter if they know you or not.
 629                  */
 630                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 631                         $tpl = get_markup_template('dfrn_request.tpl');
 632                 } else {
 633                         $tpl = get_markup_template('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 = sprintf(
 639                         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>.'),
 640                         get_server() . '/servers'
 641                 );
 642
 643                 $o = replace_macros($tpl, [
 644                         '$header' => L10n::t('Friend/Connection Request'),
 645                         '$desc' => L10n::t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@gnusocial.de'),
 646                         '$pls_answer' => L10n::t('Please answer the following:'),
 647                         '$does_know_you' => ['knowyou', L10n::t('Does %s know you?', $a->profile['name']), false, '', [L10n::t('No'), L10n::t('Yes')]],
 648                         '$add_note' => L10n::t('Add a personal note:'),
 649                         '$page_desc' => $page_desc,
 650                         '$friendica' => L10n::t('Friendica'),
 651                         '$statusnet' => L10n::t("GNU Social \x28Pleroma, Mastodon\x29"),
 652                         '$diaspora' => L10n::t("Diaspora \x28Socialhome, Hubzilla\x29"),
 653                         '$diasnote' => L10n::t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.', $target_addr),
 654                         '$your_address' => L10n::t('Your Identity Address:'),
 655                         '$invite_desc' => $invite_desc,
 656                         '$submit' => L10n::t('Submit Request'),
 657                         '$cancel' => L10n::t('Cancel'),
 658                         '$nickname' => $a->argv[1],
 659                         '$name' => $a->profile['name'],
 660                         '$myaddr' => $myaddr
 661                 ]);
 662                 return $o;
 663         }
 664
 665         return; // Somebody is fishing.
 666 }