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