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\Database\DBA;
  23 use Friendica\Model\Contact;
  24 use Friendica\Model\Group;
  25 use Friendica\Model\Profile;
  26 use Friendica\Model\User;
  27 use Friendica\Module\Login;
  28 use Friendica\Network\Probe;
  29 use Friendica\Util\DateTimeFormat;
  30 use Friendica\Util\Network;
  31 use Friendica\Util\Strings;
  32
  33 function dfrn_request_init(App $a)
  34 {
  35         if ($a->argc > 1) {
  36                 $which = $a->argv[1];
  37                 Profile::load($a, $which);
  38         }
  39
  40         return;
  41 }
  42
  43 /**
  44  * Function: dfrn_request_post
  45  *
  46  * Purpose:
  47  * Handles multiple scenarios.
  48  *
  49  * Scenario 1:
  50  * Clicking 'submit' on a friend request page.
  51  *
  52  * Scenario 2:
  53  * Following Scenario 1, we are brought back to our home site
  54  * in order to link our friend request with our own server cell.
  55  * After logging in, we click 'submit' to approve the linkage.
  56  *
  57  * @param App $a
  58  * @throws ImagickException
  59  * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  60  */
  61 function dfrn_request_post(App $a)
  62 {
  63         if (($a->argc != 2) || (!count($a->profile))) {
  64                 Logger::log('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  65                 return;
  66         }
  67
  68         if (!empty($_POST['cancel'])) {
  69                 $a->internalRedirect();
  70         }
  71
  72         /*
  73          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  74          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  75          * That brings us here:
  76          */
  77         if (!empty($_POST['localconfirm']) && ($_POST['localconfirm'] == 1)) {
  78                 // Ensure this is a valid request
  79                 if (local_user() && ($a->user['nickname'] == $a->argv[1]) && !empty($_POST['dfrn_url'])) {
  80                         $dfrn_url    = Strings::escapeTags(trim($_POST['dfrn_url']));
  81                         $aes_allow   = !empty($_POST['aes_allow']);
  82                         $confirm_key = defaults($_POST, 'confirm_key', "");
  83                         $hidden      = (!empty($_POST['hidden-contact']) ? intval($_POST['hidden-contact']) : 0);
  84                         $contact_record = null;
  85                         $blocked     = 1;
  86                         $pending     = 1;
  87
  88                         if (!empty($dfrn_url)) {
  89                                 // Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  90                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  91                                         intval(local_user()),
  92                                         DBA::escape(Strings::normaliseLink($dfrn_url))
  93                                 );
  94
  95                                 if (DBA::isResult($r)) {
  96                                         if (strlen($r[0]['dfrn-id'])) {
  97                                                 // We don't need to be here. It has already happened.
  98                                                 notice(L10n::t("This introduction has already been accepted.") . EOL);
  99                                                 return;
 100                                         } else {
 101                                                 $contact_record = $r[0];
 102                                         }
 103                                 }
 104
 105                                 if (is_array($contact_record)) {
 106                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 107                                                 intval($aes_allow),
 108                                                 intval($hidden),
 109                                                 intval($contact_record['id'])
 110                                         );
 111                                 } else {
 112                                         // Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 113                                         $parms = Probe::profile($dfrn_url);
 114
 115                                         if (!count($parms)) {
 116                                                 notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
 117                                                 return;
 118                                         } else {
 119                                                 if (empty($parms['fn'])) {
 120                                                         notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 121                                                 }
 122                                                 if (empty($parms['photo'])) {
 123                                                         notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
 124                                                 }
 125                                                 $invalid = Probe::validDfrn($parms);
 126                                                 if ($invalid) {
 127                                                         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);
 128                                                         return;
 129                                                 }
 130                                         }
 131
 132                                         $dfrn_request = $parms['dfrn-request'];
 133
 134                                         $photo = $parms["photo"];
 135
 136                                         // Escape the entire array
 137                                         DBA::escapeArray($parms);
 138
 139                                         // Create a contact record on our site for the other person
 140                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 141                                                 `request`, `confirm`, `notify`, `poll`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 142                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 143                                                 intval(local_user()),
 144                                                 DateTimeFormat::utcNow(),
 145                                                 DBA::escape($dfrn_url),
 146                                                 DBA::escape(Strings::normaliseLink($dfrn_url)),
 147                                                 $parms['addr'],
 148                                                 $parms['fn'],
 149                                                 $parms['nick'],
 150                                                 $parms['photo'],
 151                                                 $parms['key'],
 152                                                 $parms['dfrn-request'],
 153                                                 $parms['dfrn-confirm'],
 154                                                 $parms['dfrn-notify'],
 155                                                 $parms['dfrn-poll'],
 156                                                 DBA::escape(Protocol::DFRN),
 157                                                 intval($aes_allow),
 158                                                 intval($hidden),
 159                                                 intval($blocked),
 160                                                 intval($pending)
 161                                         );
 162                                 }
 163
 164                                 if ($r) {
 165                                         info(L10n::t("Introduction complete.") . EOL);
 166                                 }
 167
 168                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 169                                         intval(local_user()),
 170                                         DBA::escape($dfrn_url),
 171                                         defaults($parms, 'key', '') // Potentially missing
 172                                 );
 173                                 if (DBA::isResult($r)) {
 174                                         Group::addMember(User::getDefaultGroup(local_user(), $r[0]["network"]), $r[0]['id']);
 175
 176                                         if (isset($photo)) {
 177                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 178                                         }
 179
 180                                         $forward_path = "contact/" . $r[0]['id'];
 181                                 } else {
 182                                         $forward_path = "contact";
 183                                 }
 184
 185                                 // Allow the blocked remote notification to complete
 186                                 if (is_array($contact_record)) {
 187                                         $dfrn_request = $contact_record['request'];
 188                                 }
 189
 190                                 if (!empty($dfrn_request) && strlen($confirm_key)) {
 191                                         Network::fetchUrl($dfrn_request . '?confirm_key=' . $confirm_key);
 192                                 }
 193
 194                                 // (ignore reply, nothing we can do it failed)
 195                                 $a->internalRedirect($forward_path);
 196                                 return; // NOTREACHED
 197                         }
 198                 }
 199
 200                 // invalid/bogus request
 201                 notice(L10n::t('Unrecoverable protocol error.') . EOL);
 202                 $a->internalRedirect();
 203                 return; // NOTREACHED
 204         }
 205
 206         /*
 207          * Otherwise:
 208          *
 209          * Scenario 1:
 210          * We are the requestee. A person from a remote cell has made an introduction
 211          * on our profile web page and clicked submit. We will use their DFRN-URL to
 212          * figure out how to contact their cell.
 213          *
 214          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 215          * and an introduction to show our user next time he/she logs in.
 216          * Finally redirect back to the requestor so that their site can record the request.
 217          * If our user (the requestee) later confirms this request, a record of it will need
 218          * to exist on the requestor's cell in order for the confirmation process to complete..
 219          *
 220          * It's possible that neither the requestor or the requestee are logged in at the moment,
 221          * and the requestor does not yet have any credentials to the requestee profile.
 222          *
 223          * Who is the requestee? We've already loaded their profile which means their nickname should be
 224          * in $a->argv[1] and we should have their complete info in $a->profile.
 225          *
 226          */
 227         if (!(is_array($a->profile) && count($a->profile))) {
 228                 notice(L10n::t('Profile unavailable.') . EOL);
 229                 return;
 230         }
 231
 232         $nickname       = $a->profile['nickname'];
 233         $uid            = $a->profile['uid'];
 234         $maxreq         = intval($a->profile['maxreq']);
 235         $contact_record = null;
 236         $failed         = false;
 237         $parms          = null;
 238         $blocked = 1;
 239         $pending = 1;
 240
 241         if (!empty($_POST['dfrn_url'])) {
 242                 // Block friend request spam
 243                 if ($maxreq) {
 244                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 245                                 DBA::escape(DateTimeFormat::utc('now - 24 hours')),
 246                                 intval($uid)
 247                         );
 248                         if (DBA::isResult($r) && count($r) > $maxreq) {
 249                                 notice(L10n::t('%s has received too many connection requests today.', $a->profile['name']) . EOL);
 250                                 notice(L10n::t('Spam protection measures have been invoked.') . EOL);
 251                                 notice(L10n::t('Friends are advised to please try again in 24 hours.') . EOL);
 252                                 return;
 253                         }
 254                 }
 255
 256                 /* Cleanup old introductions that remain blocked.
 257                  * Also remove the contact record, but only if there is no existing relationship
 258                  */
 259                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 260                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 261                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 262                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
 263                 );
 264                 if (DBA::isResult($r)) {
 265                         foreach ($r as $rr) {
 266                                 if (!$rr['rel']) {
 267                                         DBA::delete('contact', ['id' => $rr['cid'], 'self' => false]);
 268                                 }
 269                                 DBA::delete('intro', ['id' => $rr['iid']]);
 270                         }
 271                 }
 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 != Protocol::DIASPORA) {
 293                                 $network = Protocol::OSTATUS;
 294                         }
 295
 296                         $url = substr($url, 5);
 297                 } else {
 298                         $network = Protocol::DFRN;
 299                 }
 300
 301                 Logger::log('dfrn_request: url: ' . $url . ',network=' . $network, Logger::DEBUG);
 302
 303                 if ($network === Protocol::DFRN) {
 304                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 305                                 intval($uid),
 306                                 DBA::escape($url)
 307                         );
 308
 309                         if (DBA::isResult($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::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                         $issued_id = Strings::getRandomHex();
 323
 324                         if (is_array($contact_record)) {
 325                                 // There is a contact record but no issued-id, so this
 326                                 // is a reciprocal introduction from a known contact
 327                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 328                                         DBA::escape($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                                         $a->internalRedirect($a->cmd);
 336                                         return; // NOTREACHED
 337                                 }
 338
 339                                 if (!Network::isUrlAllowed($url)) {
 340                                         notice(L10n::t('Disallowed profile URL.') . EOL);
 341                                         $a->internalRedirect($a->cmd);
 342                                         return; // NOTREACHED
 343                                 }
 344
 345                                 if (Network::isUrlBlocked($url)) {
 346                                         notice(L10n::t('Blocked domain') . EOL);
 347                                         $a->internalRedirect($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                                         $a->internalRedirect($a->cmd);
 356                                 } else {
 357                                         if (empty($parms['fn'])) {
 358                                                 notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
 359                                         }
 360                                         if (empty($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 = $parms["photo"];
 374
 375                                 DBA::escapeArray($parms);
 376                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 377                                         `request`, `confirm`, `notify`, `poll`, `network`, `blocked`, `pending` )
 378                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 379                                         intval($uid),
 380                                         DBA::escape(DateTimeFormat::utcNow()),
 381                                         $parms['url'],
 382                                         DBA::escape(Strings::normaliseLink($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                                         $parms['dfrn-poll'],
 393                                         DBA::escape(Protocol::DFRN),
 394                                         intval($blocked),
 395                                         intval($pending)
 396                                 );
 397
 398                                 // find the contact record we just created
 399                                 if ($r) {
 400                                         $r = q("SELECT `id` FROM `contact`
 401                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 402                                                 intval($uid),
 403                                                 $parms['url'],
 404                                                 $parms['issued-id']
 405                                         );
 406                                         if (DBA::isResult($r)) {
 407                                                 $contact_record = $r[0];
 408                                                 Contact::updateAvatar($photo, $uid, $contact_record["id"], true);
 409                                         }
 410                                 }
 411                         }
 412                         if ($r === false) {
 413                                 notice(L10n::t('Failed to update contact record.') . EOL);
 414                                 return;
 415                         }
 416
 417                         $hash = Strings::getRandomHex() . (string) time();   // Generate a confirm_key
 418
 419                         if (is_array($contact_record)) {
 420                                 q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 421                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 422                                         intval($uid),
 423                                         intval($contact_record['id']),
 424                                         intval(!empty($_POST['knowyou'])),
 425                                         DBA::escape(Strings::escapeTags(trim(defaults($_POST, 'dfrn-request-message', '')))),
 426                                         DBA::escape($hash),
 427                                         DBA::escape(DateTimeFormat::utcNow())
 428                                 );
 429                         }
 430
 431                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 432                         if (!$failed) {
 433                                 info(L10n::t('Your introduction has been sent.') . EOL);
 434                         }
 435
 436                         // "Homecoming" - send the requestor back to their site to record the introduction.
 437                         $dfrn_url = bin2hex($a->getBaseURL() . '/profile/' . $nickname);
 438                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 439
 440                         System::externalRedirect($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 441                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 442                                 . '&confirm_key=' . $hash
 443                                 . (($aes_allow) ? "&aes_allow=1" : "")
 444                         );
 445                         // NOTREACHED
 446                         // END $network === Protocol::DFRN
 447                 } elseif (($network != Protocol::PHANTOM) && ($url != "")) {
 448
 449                         /* Substitute our user's feed URL into $url template
 450                          * Send the subscriber home to subscribe
 451                          */
 452                         // Diaspora needs the uri in the format user@domain.tld
 453                         // Diaspora will support the remote subscription in a future version
 454                         if ($network == Protocol::DIASPORA) {
 455                                 $uri = $nickname . '@' . $a->getHostName();
 456
 457                                 if ($a->getURLPath()) {
 458                                         $uri .= '/' . $a->getURLPath();
 459                                 }
 460
 461                                 $uri = urlencode($uri);
 462                         } else {
 463                                 $uri = 'profile/' . $nickname;
 464                         }
 465
 466                         $url = str_replace('{uri}', $uri, $url);
 467                         System::externalRedirect($url);
 468                         // NOTREACHED
 469                         // END $network != Protocol::PHANTOM
 470                 } else {
 471                         notice(L10n::t("Remote subscription can't be done for your network. Please subscribe directly on your system.") . EOL);
 472                         return;
 473                 }
 474         } return;
 475 }
 476
 477 function dfrn_request_content(App $a)
 478 {
 479         if ($a->argc != 2 || empty($a->profile)) {
 480                 return "";
 481         }
 482
 483         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 484         // to send us to the post section to record the introduction.
 485         if (!empty($_GET['dfrn_url'])) {
 486                 if (!local_user()) {
 487                         info(L10n::t("Please login to confirm introduction.") . EOL);
 488                         /* setup the return URL to come back to this page if they use openid */
 489                         return Login::form();
 490                 }
 491
 492                 // Edge case, but can easily happen in the wild. This person is authenticated,
 493                 // but not as the person who needs to deal with this request.
 494                 if ($a->user['nickname'] != $a->argv[1]) {
 495                         notice(L10n::t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 496                         return Login::form();
 497                 }
 498
 499                 $dfrn_url = Strings::escapeTags(trim(hex2bin($_GET['dfrn_url'])));
 500                 $aes_allow = !empty($_GET['aes_allow']);
 501                 $confirm_key = defaults($_GET, 'confirm_key', "");
 502
 503                 // Checking fastlane for validity
 504                 if (!empty($_SESSION['fastlane']) && (Strings::normaliseLink($_SESSION["fastlane"]) == Strings::normaliseLink($dfrn_url))) {
 505                         $_POST["dfrn_url"] = $dfrn_url;
 506                         $_POST["confirm_key"] = $confirm_key;
 507                         $_POST["localconfirm"] = 1;
 508                         $_POST["hidden-contact"] = 0;
 509                         $_POST["submit"] = L10n::t('Confirm');
 510
 511                         dfrn_request_post($a);
 512
 513                         exit();
 514                 }
 515
 516                 $tpl = Renderer::getMarkupTemplate("dfrn_req_confirm.tpl");
 517                 $o = Renderer::replaceMacros($tpl, [
 518                         '$dfrn_url' => $dfrn_url,
 519                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 520                         '$hidethem' => L10n::t('Hide this contact'),
 521                         '$confirm_key' => $confirm_key,
 522                         '$welcome' => L10n::t('Welcome home %s.', $a->user['username']),
 523                         '$please' => L10n::t('Please confirm your introduction/connection request to %s.', $dfrn_url),
 524                         '$submit' => L10n::t('Confirm'),
 525                         '$uid' => $_SESSION['uid'],
 526                         '$nickname' => $a->user['nickname'],
 527                         'dfrn_rawurl' => $_GET['dfrn_url']
 528                 ]);
 529                 return $o;
 530         } elseif (!empty($_GET['confirm_key'])) {
 531                 // we are the requestee and it is now safe to send our user their introduction,
 532                 // We could just unblock it, but first we have to jump through a few hoops to
 533                 // send an email, or even to find out if we need to send an email.
 534                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 535                         DBA::escape($_GET['confirm_key'])
 536                 );
 537
 538                 if (DBA::isResult($intro)) {
 539                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 540                                 WHERE `contact`.`id` = %d LIMIT 1",
 541                                 intval($intro[0]['contact-id'])
 542                         );
 543
 544                         $auto_confirm = false;
 545
 546                         if (DBA::isResult($r)) {
 547                                 if ($r[0]['page-flags'] != User::PAGE_FLAGS_NORMAL && $r[0]['page-flags'] != User::PAGE_FLAGS_PRVGROUP) {
 548                                         $auto_confirm = true;
 549                                 }
 550
 551                                 if (!$auto_confirm) {
 552                                         notification([
 553                                                 'type'         => NOTIFY_INTRO,
 554                                                 'notify_flags' => $r[0]['notify-flags'],
 555                                                 'language'     => $r[0]['language'],
 556                                                 'to_name'      => $r[0]['username'],
 557                                                 'to_email'     => $r[0]['email'],
 558                                                 'uid'          => $r[0]['uid'],
 559                                                 'link'         => System::baseUrl() . '/notifications/intros',
 560                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : L10n::t('[Name Withheld]')),
 561                                                 'source_link'  => $r[0]['url'],
 562                                                 'source_photo' => $r[0]['photo'],
 563                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 564                                                 'otype'        => 'intro'
 565                                         ]);
 566                                 }
 567
 568                                 if ($auto_confirm) {
 569                                         require_once 'mod/dfrn_confirm.php';
 570                                         $handsfree = [
 571                                                 'uid'      => $r[0]['uid'],
 572                                                 'node'     => $r[0]['nickname'],
 573                                                 'dfrn_id'  => $r[0]['issued-id'],
 574                                                 'intro_id' => $intro[0]['id'],
 575                                                 'duplex'   => (($r[0]['page-flags'] == User::PAGE_FLAGS_FREELOVE) ? 1 : 0),
 576                                         ];
 577                                         dfrn_confirm_post($a, $handsfree);
 578                                 }
 579                         }
 580
 581                         if (!$auto_confirm) {
 582
 583                                 // If we are auto_confirming, this record will have already been nuked
 584                                 // in dfrn_confirm_post()
 585
 586                                 q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 587                                         DBA::escape($_GET['confirm_key'])
 588                                 );
 589                         }
 590                 }
 591
 592                 exit();
 593         } else {
 594                 // Normal web request. Display our user's introduction form.
 595                 if ((Config::get('system', 'block_public')) && (!local_user()) && (!remote_user())) {
 596                         if (!Config::get('system', 'local_block')) {
 597                                 notice(L10n::t('Public access denied.') . EOL);
 598                                 return;
 599                         }
 600                 }
 601
 602                 // Try to auto-fill the profile address
 603                 // At first look if an address was provided
 604                 // Otherwise take the local address
 605                 if (!empty($_GET['addr'])) {
 606                         $myaddr = hex2bin($_GET['addr']);
 607                 } elseif (!empty($_GET['address'])) {
 608                         $myaddr = $_GET['address'];
 609                 } elseif (local_user()) {
 610                         if (strlen($a->getURLPath())) {
 611                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 612                         } else {
 613                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 614                         }
 615                 } else {
 616                         // last, try a zrl
 617                         $myaddr = Profile::getMyURL();
 618                 }
 619
 620                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3);
 621
 622                 /* The auto_request form only has the profile address
 623                  * because nobody is going to read the comments and
 624                  * it doesn't matter if they know you or not.
 625                  */
 626                 if ($a->profile['page-flags'] == User::PAGE_FLAGS_NORMAL) {
 627                         $tpl = Renderer::getMarkupTemplate('dfrn_request.tpl');
 628                 } else {
 629                         $tpl = Renderer::getMarkupTemplate('auto_request.tpl');
 630                 }
 631
 632                 $page_desc = L10n::t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 633
 634                 $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');
 635
 636                 $o = Renderer::replaceMacros($tpl, [
 637                         '$header' => L10n::t('Friend/Connection Request'),
 638                         '$desc' => L10n::t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@gnusocial.de'),
 639                         '$pls_answer' => L10n::t('Please answer the following:'),
 640                         '$does_know_you' => ['knowyou', L10n::t('Does %s know you?', $a->profile['name']), false, '', [L10n::t('No'), L10n::t('Yes')]],
 641                         '$add_note' => L10n::t('Add a personal note:'),
 642                         '$page_desc' => $page_desc,
 643                         '$friendica' => L10n::t('Friendica'),
 644                         '$statusnet' => L10n::t("GNU Social \x28Pleroma, Mastodon\x29"),
 645                         '$diaspora' => L10n::t("Diaspora \x28Socialhome, Hubzilla\x29"),
 646                         '$diasnote' => L10n::t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.', $target_addr),
 647                         '$your_address' => L10n::t('Your Identity Address:'),
 648                         '$invite_desc' => $invite_desc,
 649                         '$submit' => L10n::t('Submit Request'),
 650                         '$cancel' => L10n::t('Cancel'),
 651                         '$nickname' => $a->argv[1],
 652                         '$name' => $a->profile['name'],
 653                         '$myaddr' => $myaddr
 654                 ]);
 655                 return $o;
 656         }
 657 }