mod/dfrn_request.php

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