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