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\System;
  17 use Friendica\Network\Probe;
  18
  19 require_once 'include/enotify.php';
  20 require_once 'include/probe.php';
  21 require_once 'include/group.php';
  22
  23 function dfrn_request_init(App $a) {
  24
  25         if($a->argc > 1)
  26                 $which = $a->argv[1];
  27
  28         profile_load($a,$which);
  29         return;
  30 }
  31
  32
  33 /**
  34  * Function: dfrn_request_post
  35  *
  36  * Purpose:
  37  * Handles multiple scenarios.
  38  *
  39  * Scenario 1:
  40  * Clicking 'submit' on a friend request page.
  41  *
  42  * Scenario 2:
  43  * Following Scenario 1, we are brought back to our home site
  44  * in order to link our friend request with our own server cell.
  45  * After logging in, we click 'submit' to approve the linkage.
  46  *
  47  */
  48 function dfrn_request_post(App $a) {
  49
  50         if(($a->argc != 2) || (! count($a->profile))) {
  51                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  52                 return;
  53         }
  54
  55
  56         if(x($_POST, 'cancel')) {
  57                 goaway(z_root());
  58         }
  59
  60
  61         /*
  62          *
  63          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  64          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  65          * That brings us here:
  66          *
  67          */
  68
  69         if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  70
  71                 /*
  72                  * Ensure this is a valid request
  73                  */
  74
  75                 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
  76
  77
  78                         $dfrn_url    = notags(trim($_POST['dfrn_url']));
  79                         $aes_allow   = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  80                         $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
  81                         $hidden = ((x($_POST,'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  82                         $contact_record = null;
  83                         $blocked = 1;
  84                         $pending = 1;
  85
  86                         if(x($dfrn_url)) {
  87
  88                                 /*
  89                                  * Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  90                                  */
  91
  92                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  93                                         intval(local_user()),
  94                                         dbesc(normalise_link($dfrn_url))
  95                                 );
  96
  97                                 if (dbm::is_result($r)) {
  98                                         if(strlen($r[0]['dfrn-id'])) {
  99
 100                                                 /*
 101                                                  * We don't need to be here. It has already happened.
 102                                                  */
 103
 104                                                 notice( t("This introduction has already been accepted.") . EOL );
 105                                                 return;
 106                                         }
 107                                         else
 108                                                 $contact_record = $r[0];
 109                                 }
 110
 111                                 if(is_array($contact_record)) {
 112                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 113                                                 intval($aes_allow),
 114                                                 intval($hidden),
 115                                                 intval($contact_record['id'])
 116                                         );
 117                                 }
 118                                 else {
 119
 120                                         /*
 121                                          * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 122                                          */
 123
 124                                         $parms = Probe::profile($dfrn_url);
 125
 126                                         if (! count($parms)) {
 127                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 128                                                 return;
 129                                         }
 130                                         else {
 131                                                 if (! x($parms,'fn')) {
 132                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 133                                                 }
 134                                                 if (! x($parms,'photo')) {
 135                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
 136                                                 }
 137                                                 $invalid = Probe::validDfrn($parms);
 138                                                 if ($invalid) {
 139                                                         notice( sprintf( tt("%d required parameter was not found at the given location",
 140                                                                                                 "%d required parameters were not found at the given location",
 141                                                                                                 $invalid), $invalid) . EOL );
 142                                                         return;
 143                                                 }
 144                                         }
 145
 146                                         $dfrn_request = $parms['dfrn-request'];
 147
 148                                         $photo = $parms["photo"];
 149
 150                                         // Escape the entire array
 151                                         dbm::esc_array($parms);
 152
 153                                         /*
 154                                          * Create a contact record on our site for the other person
 155                                          */
 156
 157                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 158                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 159                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 160                                                 intval(local_user()),
 161                                                 datetime_convert(),
 162                                                 dbesc($dfrn_url),
 163                                                 dbesc(normalise_link($dfrn_url)),
 164                                                 $parms['addr'],
 165                                                 $parms['fn'],
 166                                                 $parms['nick'],
 167                                                 $parms['photo'],
 168                                                 $parms['key'],
 169                                                 $parms['dfrn-request'],
 170                                                 $parms['dfrn-confirm'],
 171                                                 $parms['dfrn-notify'],
 172                                                 $parms['dfrn-poll'],
 173                                                 $parms['dfrn-poco'],
 174                                                 dbesc(NETWORK_DFRN),
 175                                                 intval($aes_allow),
 176                                                 intval($hidden),
 177                                                 intval($blocked),
 178                                                 intval($pending)
 179                                         );
 180                                 }
 181
 182                                 if ($r) {
 183                                         info( t("Introduction complete.") . EOL);
 184                                 }
 185
 186                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 187                                         intval(local_user()),
 188                                         dbesc($dfrn_url),
 189                                         $parms['key'] // this was already escaped
 190                                 );
 191                                 if (dbm::is_result($r)) {
 192                                         $def_gid = get_default_group(local_user(), $r[0]["network"]);
 193                                         if(intval($def_gid))
 194                                                 group_add_member(local_user(), '', $r[0]['id'], $def_gid);
 195
 196                                         if (isset($photo))
 197                                                 update_contact_avatar($photo, local_user(), $r[0]["id"], true);
 198
 199                                         $forwardurl = App::get_baseurl()."/contacts/".$r[0]['id'];
 200                                 } else {
 201                                         $forwardurl = App::get_baseurl()."/contacts";
 202                                 }
 203
 204                                 /*
 205                                  * Allow the blocked remote notification to complete
 206                                  */
 207
 208                                 if (is_array($contact_record)) {
 209                                         $dfrn_request = $contact_record['request'];
 210                                 }
 211
 212                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 213                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 214                                 }
 215
 216                                 // (ignore reply, nothing we can do it failed)
 217
 218                                 // Old: goaway(zrl($dfrn_url));
 219                                 goaway($forwardurl);
 220                                 return; // NOTREACHED
 221
 222                         }
 223
 224                 }
 225
 226                 // invalid/bogus request
 227
 228                 notice( t('Unrecoverable protocol error.') . EOL );
 229                 goaway(z_root());
 230                 return; // NOTREACHED
 231         }
 232
 233         /*
 234          * Otherwise:
 235          *
 236          * Scenario 1:
 237          * We are the requestee. A person from a remote cell has made an introduction
 238          * on our profile web page and clicked submit. We will use their DFRN-URL to
 239          * figure out how to contact their cell.
 240          *
 241          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 242          * and an introduction to show our user next time he/she logs in.
 243          * Finally redirect back to the requestor so that their site can record the request.
 244          * If our user (the requestee) later confirms this request, a record of it will need
 245          * to exist on the requestor's cell in order for the confirmation process to complete..
 246          *
 247          * It's possible that neither the requestor or the requestee are logged in at the moment,
 248          * and the requestor does not yet have any credentials to the requestee profile.
 249          *
 250          * Who is the requestee? We've already loaded their profile which means their nickname should be
 251          * in $a->argv[1] and we should have their complete info in $a->profile.
 252          *
 253          */
 254
 255         if(! (is_array($a->profile) && count($a->profile))) {
 256                 notice( t('Profile unavailable.') . EOL);
 257                 return;
 258         }
 259
 260         $nickname       = $a->profile['nickname'];
 261         $notify_flags   = $a->profile['notify-flags'];
 262         $uid            = $a->profile['uid'];
 263         $maxreq         = intval($a->profile['maxreq']);
 264         $contact_record = null;
 265         $failed         = false;
 266         $parms          = null;
 267         $blocked = 1;
 268         $pending = 1;
 269
 270
 271         if( x($_POST,'dfrn_url')) {
 272
 273                 /*
 274                  * Block friend request spam
 275                  */
 276
 277                 if($maxreq) {
 278                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 279                                 dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
 280                                 intval($uid)
 281                         );
 282                         if (dbm::is_result($r) && count($r) > $maxreq) {
 283                                 notice( sprintf( t('%s has received too many connection requests today.'),  $a->profile['name']) . EOL);
 284                                 notice( t('Spam protection measures have been invoked.') . EOL);
 285                                 notice( t('Friends are advised to please try again in 24 hours.') . EOL);
 286                                 return;
 287                         }
 288                 }
 289
 290                 /*
 291                  *
 292                  * Cleanup old introductions that remain blocked.
 293                  * Also remove the contact record, but only if there is no existing relationship
 294                  * Do not remove email contacts as these may be awaiting email verification
 295                  */
 296
 297                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 298                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 299                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 300                         AND `contact`.`network` != '%s'
 301                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ",
 302                         dbesc(NETWORK_MAIL2)
 303                 );
 304                 if (dbm::is_result($r)) {
 305                         foreach ($r as $rr) {
 306                                 if(! $rr['rel']) {
 307                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 308                                                 intval($rr['cid'])
 309                                         );
 310                                 }
 311                                 q("DELETE FROM `intro` WHERE `id` = %d",
 312                                         intval($rr['iid'])
 313                                 );
 314                         }
 315                 }
 316
 317                 /*
 318                  *
 319                  * Cleanup any old email intros - which will have a greater lifetime
 320                  */
 321
 322                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 323                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 324                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 325                         AND `contact`.`network` = '%s'
 326                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 3 DAY ",
 327                         dbesc(NETWORK_MAIL2)
 328                 );
 329                 if (dbm::is_result($r)) {
 330                         foreach ($r as $rr) {
 331                                 if(! $rr['rel']) {
 332                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 333                                                 intval($rr['cid'])
 334                                         );
 335                                 }
 336                                 q("DELETE FROM `intro` WHERE `id` = %d",
 337                                         intval($rr['iid'])
 338                                 );
 339                         }
 340                 }
 341
 342                 $email_follow = (x($_POST,'email_follow') ? intval($_POST['email_follow']) : 0);
 343                 $real_name = (x($_POST,'realname') ? notags(trim($_POST['realname'])) : '');
 344
 345                 $url = trim($_POST['dfrn_url']);
 346                 if(! strlen($url)) {
 347                         notice( t("Invalid locator") . EOL );
 348                         return;
 349                 }
 350
 351                 $hcard = '';
 352
 353                 if($email_follow) {
 354
 355                         if(! validate_email($url)) {
 356                                 notice( t('Invalid email address.') . EOL);
 357                                 return;
 358                         }
 359
 360                         $addr    = $url;
 361                         $name    = ($realname) ? $realname : $addr;
 362                         $nick    = substr($addr,0,strpos($addr,'@'));
 363                         $url     = 'http://' . substr($addr,strpos($addr,'@') + 1);
 364                         $nurl    = normalise_url($host);
 365                         $poll    = 'email ' . random_string();
 366                         $notify  = 'smtp ' . random_string();
 367                         $network = NETWORK_MAIL2;
 368                         $rel     = CONTACT_IS_FOLLOWER;
 369
 370                         $mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
 371                         if(get_config('system','dfrn_only'))
 372                                 $mail_disabled = 1;
 373
 374                         if(! $mail_disabled) {
 375                                 $failed = false;
 376                                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
 377                                         intval($uid)
 378                                 );
 379
 380                                 if (! dbm::is_result($r)) {
 381                                         notice( t('This account has not been configured for email. Request failed.') . EOL);
 382                                         return;
 383                                 }
 384                         }
 385
 386                         $r = q("insert into contact ( uid, created, addr, name, nick, url, nurl, poll, notify, blocked, pending, network, rel )
 387                                 values( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', %d ) ",
 388                                 intval($uid),
 389                                 dbesc(datetime_convert()),
 390                                 dbesc($addr),
 391                                 dbesc($name),
 392                                 dbesc($nick),
 393                                 dbesc($url),
 394                                 dbesc($nurl),
 395                                 dbesc($poll),
 396                                 dbesc($notify),
 397                                 intval($blocked),
 398                                 intval($pending),
 399                                 dbesc($network),
 400                                 intval($rel)
 401                         );
 402
 403                         $r = q("SELECT `id`, `network` FROM `contact` WHERE `poll` = '%s' AND `uid` = %d LIMIT 1",
 404                                 dbesc($poll),
 405                                 intval($uid)
 406                         );
 407                         if (dbm::is_result($r)) {
 408                                 $contact_id = $r[0]['id'];
 409
 410                                 $def_gid = get_default_group($uid, $r[0]["network"]);
 411                                 if (intval($def_gid))
 412                                         group_add_member($uid, '', $contact_id, $def_gid);
 413
 414                                 $photo = avatar_img($addr);
 415
 416                                 $r = q("UPDATE `contact` SET
 417                                         `photo` = '%s',
 418                                         `thumb` = '%s',
 419                                         `micro` = '%s',
 420                                         `name-date` = '%s',
 421                                         `uri-date` = '%s',
 422                                         `avatar-date` = '%s',
 423                                         `hidden` = 0,
 424                                         WHERE `id` = %d
 425                                 ",
 426                                         dbesc($photos[0]),
 427                                         dbesc($photos[1]),
 428                                         dbesc($photos[2]),
 429                                         dbesc(datetime_convert()),
 430                                         dbesc(datetime_convert()),
 431                                         dbesc(datetime_convert()),
 432                                         intval($contact_id)
 433                                 );
 434                         }
 435
 436                         // contact is created. Now create an introduction
 437
 438                         $hash = random_string();
 439
 440                         $r = q("INSERT INTO `intro` ( `uid`, `contact-id`, knowyou, note, hash, datetime, blocked )
 441                                 VALUES( %d , %d, %d, '%s', '%s', '%s', %d ) ",
 442                                 intval($uid),
 443                                 intval($contact_id),
 444                                 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 445                                 dbesc(notags(trim($_POST['dfrn-request-message']))),
 446                                 dbesc($hash),
 447                                 dbesc(datetime_convert()),
 448                                 1
 449                         );
 450
 451                         // Next send an email verify form to the requestor.
 452
 453                 } else {
 454                         // Detect the network
 455                         $data = probe_url($url);
 456                         $network = $data["network"];
 457
 458                         // Canonicalise email-style profile locator
 459                         $url = Probe::webfingerDfrn($url,$hcard);
 460
 461                         if (substr($url,0,5) === 'stat:') {
 462
 463                                 // Every time we detect the remote subscription we define this as OStatus.
 464                                 // We do this even if it is not OStatus.
 465                                 // we only need to pass this through another section of the code.
 466                                 if ($network != NETWORK_DIASPORA)
 467                                         $network = NETWORK_OSTATUS;
 468
 469                                 $url = substr($url,5);
 470                         } else
 471                                 $network = NETWORK_DFRN;
 472                 }
 473
 474                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 475
 476                 if($network === NETWORK_DFRN) {
 477                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 478                                 intval($uid),
 479                                 dbesc($url)
 480                         );
 481
 482                         if (dbm::is_result($ret)) {
 483                                 if(strlen($ret[0]['issued-id'])) {
 484                                         notice( t('You have already introduced yourself here.') . EOL );
 485                                         return;
 486                                 }
 487                                 elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 488                                         notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
 489                                         return;
 490                                 }
 491                                 else {
 492                                         $contact_record = $ret[0];
 493                                         $parms = array('dfrn-request' => $ret[0]['request']);
 494                                 }
 495                         }
 496
 497                         $issued_id = random_string();
 498
 499                         if(is_array($contact_record)) {
 500                                 // There is a contact record but no issued-id, so this
 501                                 // is a reciprocal introduction from a known contact
 502                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 503                                         dbesc($issued_id),
 504                                         intval($contact_record['id'])
 505                                 );
 506                         }
 507                         else {
 508                                 if (! validate_url($url)) {
 509                                         notice( t('Invalid profile URL.') . EOL);
 510                                         goaway(App::get_baseurl() . '/' . $a->cmd);
 511                                         return; // NOTREACHED
 512                                 }
 513
 514                                 if (! allowed_url($url)) {
 515                                         notice( t('Disallowed profile URL.') . EOL);
 516                                         goaway(App::get_baseurl() . '/' . $a->cmd);
 517                                         return; // NOTREACHED
 518                                 }
 519
 520                                 if (blocked_url($url)) {
 521                                         notice( t('Blocked domain') . EOL);
 522                                         goaway(App::get_baseurl() . '/' . $a->cmd);
 523                                         return; // NOTREACHED
 524                                 }
 525
 526                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 527
 528                                 if (! count($parms)) {
 529                                         notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 530                                         goaway(App::get_baseurl() . '/' . $a->cmd);
 531                                 }
 532                                 else {
 533                                         if (! x($parms,'fn')) {
 534                                                 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 535                                         }
 536                                         if (! x($parms,'photo')) {
 537                                                 notice( t('Warning: profile location has no profile photo.') . EOL );
 538                                         }
 539                                         $invalid = Probe::validDfrn($parms);
 540                                         if ($invalid) {
 541                                                 notice( sprintf( tt("%d required parameter was not found at the given location",
 542                                                                                         "%d required parameters were not found at the given location",
 543                                                                                         $invalid), $invalid) . EOL );
 544
 545                                                 return;
 546                                         }
 547                                 }
 548
 549
 550                                 $parms['url'] = $url;
 551                                 $parms['issued-id'] = $issued_id;
 552                                 $photo = $parms["photo"];
 553
 554                                 dbm::esc_array($parms);
 555                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 556                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 557                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 558                                         intval($uid),
 559                                         dbesc(datetime_convert()),
 560                                         $parms['url'],
 561                                         dbesc(normalise_link($url)),
 562                                         $parms['addr'],
 563                                         $parms['fn'],
 564                                         $parms['nick'],
 565                                         $parms['issued-id'],
 566                                         $parms['photo'],
 567                                         $parms['key'],
 568                                         $parms['dfrn-request'],
 569                                         $parms['dfrn-confirm'],
 570                                         $parms['dfrn-notify'],
 571                                         $parms['dfrn-poll'],
 572                                         $parms['dfrn-poco'],
 573                                         dbesc(NETWORK_DFRN),
 574                                         intval($blocked),
 575                                         intval($pending)
 576                                 );
 577
 578                                 // find the contact record we just created
 579                                 if ($r) {
 580                                         $r = q("SELECT `id` FROM `contact`
 581                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 582                                                 intval($uid),
 583                                                 $parms['url'],
 584                                                 $parms['issued-id']
 585                                         );
 586                                         if (dbm::is_result($r)) {
 587                                                 $contact_record = $r[0];
 588                                                 update_contact_avatar($photo, $uid, $contact_record["id"], true);
 589                                         }
 590                                 }
 591
 592                         }
 593                         if ($r === false) {
 594                                 notice( t('Failed to update contact record.') . EOL );
 595                                 return;
 596                         }
 597
 598                         $hash = random_string() . (string) time();   // Generate a confirm_key
 599
 600                         if (is_array($contact_record)) {
 601                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 602                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 603                                         intval($uid),
 604                                         intval($contact_record['id']),
 605                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 606                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 607                                         dbesc($hash),
 608                                         dbesc(datetime_convert())
 609                                 );
 610                         }
 611
 612                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 613
 614                         if (! $failed) {
 615                                 info( t('Your introduction has been sent.') . EOL );
 616                         }
 617
 618                         // "Homecoming" - send the requestor back to their site to record the introduction.
 619
 620                         $dfrn_url = bin2hex(App::get_baseurl() . '/profile/' . $nickname);
 621                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 622
 623                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 624                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 625                                 . '&confirm_key='  . $hash
 626                                 . (($aes_allow) ? "&aes_allow=1" : "")
 627                         );
 628                         // NOTREACHED
 629                         // END $network === NETWORK_DFRN
 630                 } elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 631
 632                         /*
 633                          *
 634                          * Substitute our user's feed URL into $url template
 635                          * Send the subscriber home to subscribe
 636                          *
 637                          */
 638
 639                         // Diaspora needs the uri in the format user@domain.tld
 640                         // Diaspora will support the remote subscription in a future version
 641                         if ($network == NETWORK_DIASPORA) {
 642                                 $uri = $nickname.'@'.$a->get_hostname();
 643
 644                                 if ($a->get_path())
 645                                         $uri .= '/'.$a->get_path();
 646
 647                                 $uri = urlencode($uri);
 648                         } else {
 649                                 $uri = App::get_baseurl().'/profile/'.$nickname;
 650                         }
 651
 652                         $url = str_replace('{uri}', $uri, $url);
 653                         goaway($url);
 654                         // NOTREACHED
 655                         // END $network != NETWORK_PHANTOM
 656                 } else {
 657                         notice(t("Remote subscription can't be done for your network. Please subscribe directly on your system.").EOL);
 658                         return;
 659                 }
 660
 661         }       return;
 662 }
 663
 664
 665 function dfrn_request_content(App $a) {
 666
 667         if (($a->argc != 2) || (! count($a->profile))) {
 668                 return "";
 669         }
 670
 671
 672         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 673         // to send us to the post section to record the introduction.
 674
 675         if (x($_GET,'dfrn_url')) {
 676
 677                 if (! local_user()) {
 678                         info( t("Please login to confirm introduction.") . EOL );
 679                         /* setup the return URL to come back to this page if they use openid */
 680                         $_SESSION['return_url'] = $a->query_string;
 681                         return login();
 682                 }
 683
 684                 // Edge case, but can easily happen in the wild. This person is authenticated,
 685                 // but not as the person who needs to deal with this request.
 686
 687                 if ($a->user['nickname'] != $a->argv[1]) {
 688                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 689                         return login();
 690                 }
 691
 692                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 693                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 694                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 695
 696                 // Checking fastlane for validity
 697                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 698                         $_POST["dfrn_url"] = $dfrn_url;
 699                         $_POST["confirm_key"] = $confirm_key;
 700                         $_POST["localconfirm"] = 1;
 701                         $_POST["hidden-contact"] = 0;
 702                         $_POST["submit"] = t('Confirm');
 703
 704                         dfrn_request_post($a);
 705
 706                         killme();
 707                         return; // NOTREACHED
 708                 }
 709
 710                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 711                 $o  = replace_macros($tpl,array(
 712                         '$dfrn_url' => $dfrn_url,
 713                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 714                         '$hidethem' => t('Hide this contact'),
 715                         '$hidechecked' => '',
 716                         '$confirm_key' => $confirm_key,
 717                         '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
 718                         '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
 719                         '$submit' => t('Confirm'),
 720                         '$uid' => $_SESSION['uid'],
 721                         '$nickname' => $a->user['nickname'],
 722                         'dfrn_rawurl' => $_GET['dfrn_url']
 723                         ));
 724                 return $o;
 725
 726         }
 727         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 728
 729                 // we are the requestee and it is now safe to send our user their introduction,
 730                 // We could just unblock it, but first we have to jump through a few hoops to
 731                 // send an email, or even to find out if we need to send an email.
 732
 733                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 734                         dbesc($_GET['confirm_key'])
 735                 );
 736
 737                 if (dbm::is_result($intro)) {
 738
 739                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 740                                 WHERE `contact`.`id` = %d LIMIT 1",
 741                                 intval($intro[0]['contact-id'])
 742                         );
 743
 744                         $auto_confirm = false;
 745
 746                         if (dbm::is_result($r)) {
 747                                 if(($r[0]['page-flags'] != PAGE_NORMAL) && ($r[0]['page-flags'] != PAGE_PRVGROUP))
 748                                         $auto_confirm = true;
 749
 750                                 if(! $auto_confirm) {
 751
 752                                         notification(array(
 753                                                 'type'         => NOTIFY_INTRO,
 754                                                 'notify_flags' => $r[0]['notify-flags'],
 755                                                 'language'     => $r[0]['language'],
 756                                                 'to_name'      => $r[0]['username'],
 757                                                 'to_email'     => $r[0]['email'],
 758                                                 'uid'          => $r[0]['uid'],
 759                                                 'link'         => App::get_baseurl() . '/notifications/intros',
 760                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 761                                                 'source_link'  => $r[0]['url'],
 762                                                 'source_photo' => $r[0]['photo'],
 763                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 764                                                 'otype'        => 'intro'
 765                                         ));
 766                                 }
 767
 768                                 if($auto_confirm) {
 769                                         require_once 'mod/dfrn_confirm.php';
 770                                         $handsfree = array(
 771                                                 'uid'      => $r[0]['uid'],
 772                                                 'node'     => $r[0]['nickname'],
 773                                                 'dfrn_id'  => $r[0]['issued-id'],
 774                                                 'intro_id' => $intro[0]['id'],
 775                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 776                                                 'activity' => intval(get_pconfig($r[0]['uid'],'system','post_newfriend'))
 777                                         );
 778                                         dfrn_confirm_post($a,$handsfree);
 779                                 }
 780
 781                         }
 782
 783                         if(! $auto_confirm) {
 784
 785                                 // If we are auto_confirming, this record will have already been nuked
 786                                 // in dfrn_confirm_post()
 787
 788                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 789                                         dbesc($_GET['confirm_key'])
 790                                 );
 791                         }
 792                 }
 793
 794                 killme();
 795                 return; // NOTREACHED
 796         }
 797         else {
 798
 799                 /*
 800                  * Normal web request. Display our user's introduction form.
 801                  */
 802
 803                 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
 804                         if(! get_config('system','local_block')) {
 805                                 notice( t('Public access denied.') . EOL);
 806                                 return;
 807                         }
 808                 }
 809
 810
 811                 /*
 812                  * Try to auto-fill the profile address
 813                  */
 814
 815                 // At first look if an address was provided
 816                 // Otherwise take the local address
 817                 if (x($_GET,'addr') && ($_GET['addr'] != "")) {
 818                         $myaddr = hex2bin($_GET['addr']);
 819                 } elseif (x($_GET,'address') && ($_GET['address'] != "")) {
 820                         $myaddr = $_GET['address'];
 821                 } elseif (local_user()) {
 822                         if (strlen($a->path)) {
 823                                 $myaddr = App::get_baseurl() . '/profile/' . $a->user['nickname'];
 824                         } else {
 825                                 $myaddr = $a->user['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 );
 826                         }
 827                 } else {
 828                         // last, try a zrl
 829                         $myaddr = get_my_url();
 830                 }
 831
 832                 $target_addr = $a->profile['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 );
 833
 834
 835                 /*
 836                  *
 837                  * The auto_request form only has the profile address
 838                  * because nobody is going to read the comments and
 839                  * it doesn't matter if they know you or not.
 840                  *
 841                  */
 842
 843                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 844                         $tpl = get_markup_template('dfrn_request.tpl');
 845                 } else {
 846                         $tpl = get_markup_template('auto_request.tpl');
 847                 }
 848
 849                 $page_desc = t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 850
 851                 // see if we are allowed to have NETWORK_MAIL2 contacts
 852
 853                 $mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
 854
 855                 if (get_config('system','dfrn_only')) {
 856                         $mail_disabled = 1;
 857                 }
 858
 859                 if (! $mail_disabled) {
 860                         $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
 861                                 intval($a->profile['uid'])
 862                         );
 863                         if (! dbm::is_result($r)) {
 864                                 $mail_disabled = 1;
 865                         }
 866                 }
 867
 868                 // "coming soon" is disabled for now
 869                 //$emailnet = (($mail_disabled) ? '' : t("<strike>Connect as an email follower</strike> \x28Coming soon\x29"));
 870                 $emailnet = "";
 871
 872                 $invite_desc = sprintf(
 873                         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>.'),
 874                         get_server()
 875                 );
 876
 877                 $o = replace_macros($tpl,array(
 878                         '$header' => t('Friend/Connection Request'),
 879                         '$desc' => t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@identi.ca'),
 880                         '$pls_answer' => t('Please answer the following:'),
 881                         '$does_know_you' => array('knowyou', sprintf(t('Does %s know you?'),$a->profile['name']), false, '', array(t('No'), t('Yes'))),
 882                         /*'$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']),
 883                         '$yes' => t('Yes'),
 884                         '$no' => t('No'), */
 885                         '$add_note' => t('Add a personal note:'),
 886                         '$page_desc' => $page_desc,
 887                         '$friendica' => t('Friendica'),
 888                         '$statusnet' => t('StatusNet/Federated Social Web'),
 889                         '$diaspora' => t('Diaspora'),
 890                         '$diasnote' => sprintf (t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.'),$target_addr),
 891                         '$your_address' => t('Your Identity Address:'),
 892                         '$invite_desc' => $invite_desc,
 893                         '$emailnet' => $emailnet,
 894                         '$submit' => t('Submit Request'),
 895                         '$cancel' => t('Cancel'),
 896                         '$nickname' => $a->argv[1],
 897                         '$name' => $a->profile['name'],
 898                         '$myaddr' => $myaddr
 899                 ));
 900                 return $o;
 901         }
 902
 903         return; // Somebody is fishing.
 904 }