mod/dfrn_request.php

   1 <?php
   2 /**
   3  * @file mod/dfrn_request.php
   4  * @brief Module: dfrn_request
   5  *
   6  * Purpose: Handles communication associated with the issuance of
   7  * friend requests.
   8  *
   9  * @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  10  *    You also find a graphic which describes the confirmation process at
  11  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_request.png
  12  */
  13 use Friendica\App;
  14 use Friendica\Core\Config;
  15 use Friendica\Core\PConfig;
  16 use Friendica\Core\System;
  17 use Friendica\Database\DBM;
  18 use Friendica\Network\Probe;
  19 use Friendica\Object\Contact;
  20
  21 require_once 'include/enotify.php';
  22 require_once 'include/group.php';
  23
  24 function dfrn_request_init(App $a)
  25 {
  26         if ($a->argc > 1)
  27                 $which = $a->argv[1];
  28
  29         profile_load($a, $which);
  30         return;
  31 }
  32
  33
  34 /**
  35  * Function: dfrn_request_post
  36  *
  37  * Purpose:
  38  * Handles multiple scenarios.
  39  *
  40  * Scenario 1:
  41  * Clicking 'submit' on a friend request page.
  42  *
  43  * Scenario 2:
  44  * Following Scenario 1, we are brought back to our home site
  45  * in order to link our friend request with our own server cell.
  46  * After logging in, we click 'submit' to approve the linkage.
  47  *
  48  */
  49 function dfrn_request_post(App $a) {
  50
  51         if(($a->argc != 2) || (! count($a->profile))) {
  52                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  53                 return;
  54         }
  55
  56
  57         if(x($_POST, 'cancel')) {
  58                 goaway(System::baseUrl());
  59         }
  60
  61
  62         /*
  63          *
  64          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  65          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  66          * That brings us here:
  67          *
  68          */
  69
  70         if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  71
  72                 /*
  73                  * Ensure this is a valid request
  74                  */
  75
  76                 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
  77
  78
  79                         $dfrn_url    = notags(trim($_POST['dfrn_url']));
  80                         $aes_allow   = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  81                         $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
  82                         $hidden = ((x($_POST,'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  83                         $contact_record = null;
  84                         $blocked = 1;
  85                         $pending = 1;
  86
  87                         if(x($dfrn_url)) {
  88
  89                                 /*
  90                                  * Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  91                                  */
  92
  93                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  94                                         intval(local_user()),
  95                                         dbesc(normalise_link($dfrn_url))
  96                                 );
  97
  98                                 if (DBM::is_result($r)) {
  99                                         if(strlen($r[0]['dfrn-id'])) {
 100
 101                                                 /*
 102                                                  * We don't need to be here. It has already happened.
 103                                                  */
 104
 105                                                 notice( t("This introduction has already been accepted.") . EOL );
 106                                                 return;
 107                                         }
 108                                         else
 109                                                 $contact_record = $r[0];
 110                                 }
 111
 112                                 if(is_array($contact_record)) {
 113                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 114                                                 intval($aes_allow),
 115                                                 intval($hidden),
 116                                                 intval($contact_record['id'])
 117                                         );
 118                                 }
 119                                 else {
 120
 121                                         /*
 122                                          * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 123                                          */
 124
 125                                         $parms = Probe::profile($dfrn_url);
 126
 127                                         if (! count($parms)) {
 128                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 129                                                 return;
 130                                         }
 131                                         else {
 132                                                 if (! x($parms,'fn')) {
 133                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 134                                                 }
 135                                                 if (! x($parms,'photo')) {
 136                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
 137                                                 }
 138                                                 $invalid = Probe::validDfrn($parms);
 139                                                 if ($invalid) {
 140                                                         notice( sprintf( tt("%d required parameter was not found at the given location",
 141                                                                                                 "%d required parameters were not found at the given location",
 142                                                                                                 $invalid), $invalid) . EOL );
 143                                                         return;
 144                                                 }
 145                                         }
 146
 147                                         $dfrn_request = $parms['dfrn-request'];
 148
 149                                         $photo = $parms["photo"];
 150
 151                                         // Escape the entire array
 152                                         DBM::esc_array($parms);
 153
 154                                         /*
 155                                          * Create a contact record on our site for the other person
 156                                          */
 157
 158                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 159                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 160                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 161                                                 intval(local_user()),
 162                                                 datetime_convert(),
 163                                                 dbesc($dfrn_url),
 164                                                 dbesc(normalise_link($dfrn_url)),
 165                                                 $parms['addr'],
 166                                                 $parms['fn'],
 167                                                 $parms['nick'],
 168                                                 $parms['photo'],
 169                                                 $parms['key'],
 170                                                 $parms['dfrn-request'],
 171                                                 $parms['dfrn-confirm'],
 172                                                 $parms['dfrn-notify'],
 173                                                 $parms['dfrn-poll'],
 174                                                 $parms['dfrn-poco'],
 175                                                 dbesc(NETWORK_DFRN),
 176                                                 intval($aes_allow),
 177                                                 intval($hidden),
 178                                                 intval($blocked),
 179                                                 intval($pending)
 180                                         );
 181                                 }
 182
 183                                 if ($r) {
 184                                         info( t("Introduction complete.") . EOL);
 185                                 }
 186
 187                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 188                                         intval(local_user()),
 189                                         dbesc($dfrn_url),
 190                                         $parms['key'] // this was already escaped
 191                                 );
 192                                 if (DBM::is_result($r)) {
 193                                         $def_gid = get_default_group(local_user(), $r[0]["network"]);
 194                                         if(intval($def_gid))
 195                                                 group_add_member(local_user(), '', $r[0]['id'], $def_gid);
 196
 197                                         if (isset($photo))
 198                                                 Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
 199
 200                                         $forwardurl = System::baseUrl()."/contacts/".$r[0]['id'];
 201                                 } else {
 202                                         $forwardurl = System::baseUrl()."/contacts";
 203                                 }
 204
 205                                 /*
 206                                  * Allow the blocked remote notification to complete
 207                                  */
 208
 209                                 if (is_array($contact_record)) {
 210                                         $dfrn_request = $contact_record['request'];
 211                                 }
 212
 213                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 214                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 215                                 }
 216
 217                                 // (ignore reply, nothing we can do it failed)
 218
 219                                 // Old: goaway(zrl($dfrn_url));
 220                                 goaway($forwardurl);
 221                                 return; // NOTREACHED
 222
 223                         }
 224
 225                 }
 226
 227                 // invalid/bogus request
 228
 229                 notice( t('Unrecoverable protocol error.') . EOL );
 230                 goaway(System::baseUrl());
 231                 return; // NOTREACHED
 232         }
 233
 234         /*
 235          * Otherwise:
 236          *
 237          * Scenario 1:
 238          * We are the requestee. A person from a remote cell has made an introduction
 239          * on our profile web page and clicked submit. We will use their DFRN-URL to
 240          * figure out how to contact their cell.
 241          *
 242          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 243          * and an introduction to show our user next time he/she logs in.
 244          * Finally redirect back to the requestor so that their site can record the request.
 245          * If our user (the requestee) later confirms this request, a record of it will need
 246          * to exist on the requestor's cell in order for the confirmation process to complete..
 247          *
 248          * It's possible that neither the requestor or the requestee are logged in at the moment,
 249          * and the requestor does not yet have any credentials to the requestee profile.
 250          *
 251          * Who is the requestee? We've already loaded their profile which means their nickname should be
 252          * in $a->argv[1] and we should have their complete info in $a->profile.
 253          *
 254          */
 255
 256         if(! (is_array($a->profile) && count($a->profile))) {
 257                 notice( t('Profile unavailable.') . EOL);
 258                 return;
 259         }
 260
 261         $nickname       = $a->profile['nickname'];
 262         $notify_flags   = $a->profile['notify-flags'];
 263         $uid            = $a->profile['uid'];
 264         $maxreq         = intval($a->profile['maxreq']);
 265         $contact_record = null;
 266         $failed         = false;
 267         $parms          = null;
 268         $blocked = 1;
 269         $pending = 1;
 270
 271
 272         if( x($_POST,'dfrn_url')) {
 273
 274                 /*
 275                  * Block friend request spam
 276                  */
 277
 278                 if($maxreq) {
 279                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 280                                 dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
 281                                 intval($uid)
 282                         );
 283                         if (DBM::is_result($r) && count($r) > $maxreq) {
 284                                 notice( sprintf( t('%s has received too many connection requests today.'),  $a->profile['name']) . EOL);
 285                                 notice( t('Spam protection measures have been invoked.') . EOL);
 286                                 notice( t('Friends are advised to please try again in 24 hours.') . EOL);
 287                                 return;
 288                         }
 289                 }
 290
 291                 /*
 292                  *
 293                  * Cleanup old introductions that remain blocked.
 294                  * Also remove the contact record, but only if there is no existing relationship
 295                  * Do not remove email contacts as these may be awaiting email verification
 296                  */
 297
 298                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 299                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 300                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 301                         AND `contact`.`network` != '%s'
 302                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ",
 303                         dbesc(NETWORK_MAIL2)
 304                 );
 305                 if (DBM::is_result($r)) {
 306                         foreach ($r as $rr) {
 307                                 if(! $rr['rel']) {
 308                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 309                                                 intval($rr['cid'])
 310                                         );
 311                                 }
 312                                 q("DELETE FROM `intro` WHERE `id` = %d",
 313                                         intval($rr['iid'])
 314                                 );
 315                         }
 316                 }
 317
 318                 /*
 319                  *
 320                  * Cleanup any old email intros - which will have a greater lifetime
 321                  */
 322
 323                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 324                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 325                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 326                         AND `contact`.`network` = '%s'
 327                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 3 DAY ",
 328                         dbesc(NETWORK_MAIL2)
 329                 );
 330                 if (DBM::is_result($r)) {
 331                         foreach ($r as $rr) {
 332                                 if(! $rr['rel']) {
 333                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 334                                                 intval($rr['cid'])
 335                                         );
 336                                 }
 337                                 q("DELETE FROM `intro` WHERE `id` = %d",
 338                                         intval($rr['iid'])
 339                                 );
 340                         }
 341                 }
 342
 343                 $email_follow = (x($_POST,'email_follow') ? intval($_POST['email_follow']) : 0);
 344                 $real_name = (x($_POST,'realname') ? notags(trim($_POST['realname'])) : '');
 345
 346                 $url = trim($_POST['dfrn_url']);
 347                 if(! strlen($url)) {
 348                         notice( t("Invalid locator") . EOL );
 349                         return;
 350                 }
 351
 352                 $hcard = '';
 353
 354                 if($email_follow) {
 355
 356                         if(! validate_email($url)) {
 357                                 notice( t('Invalid email address.') . EOL);
 358                                 return;
 359                         }
 360
 361                         $addr    = $url;
 362                         $name    = ($realname) ? $realname : $addr;
 363                         $nick    = substr($addr,0,strpos($addr,'@'));
 364                         $url     = 'http://' . substr($addr,strpos($addr,'@') + 1);
 365                         $nurl    = normalise_url($host);
 366                         $poll    = 'email ' . random_string();
 367                         $notify  = 'smtp ' . random_string();
 368                         $network = NETWORK_MAIL2;
 369                         $rel     = CONTACT_IS_FOLLOWER;
 370
 371                         $mail_disabled = ((function_exists('imap_open') && (! Config::get('system','imap_disabled'))) ? 0 : 1);
 372                         if(Config::get('system','dfrn_only'))
 373                                 $mail_disabled = 1;
 374
 375                         if(! $mail_disabled) {
 376                                 $failed = false;
 377                                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
 378                                         intval($uid)
 379                                 );
 380
 381                                 if (! DBM::is_result($r)) {
 382                                         notice( t('This account has not been configured for email. Request failed.') . EOL);
 383                                         return;
 384                                 }
 385                         }
 386
 387                         $r = q("insert into contact ( uid, created, addr, name, nick, url, nurl, poll, notify, blocked, pending, network, rel )
 388                                 values( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', %d ) ",
 389                                 intval($uid),
 390                                 dbesc(datetime_convert()),
 391                                 dbesc($addr),
 392                                 dbesc($name),
 393                                 dbesc($nick),
 394                                 dbesc($url),
 395                                 dbesc($nurl),
 396                                 dbesc($poll),
 397                                 dbesc($notify),
 398                                 intval($blocked),
 399                                 intval($pending),
 400                                 dbesc($network),
 401                                 intval($rel)
 402                         );
 403
 404                         $r = q("SELECT `id`, `network` FROM `contact` WHERE `poll` = '%s' AND `uid` = %d LIMIT 1",
 405                                 dbesc($poll),
 406                                 intval($uid)
 407                         );
 408                         if (DBM::is_result($r)) {
 409                                 $contact_id = $r[0]['id'];
 410
 411                                 $def_gid = get_default_group($uid, $r[0]["network"]);
 412                                 if (intval($def_gid))
 413                                         group_add_member($uid, '', $contact_id, $def_gid);
 414
 415                                 $photo = avatar_img($addr);
 416
 417                                 $r = q("UPDATE `contact` SET
 418                                         `photo` = '%s',
 419                                         `thumb` = '%s',
 420                                         `micro` = '%s',
 421                                         `name-date` = '%s',
 422                                         `uri-date` = '%s',
 423                                         `avatar-date` = '%s',
 424                                         `hidden` = 0,
 425                                         WHERE `id` = %d
 426                                 ",
 427                                         dbesc($photos[0]),
 428                                         dbesc($photos[1]),
 429                                         dbesc($photos[2]),
 430                                         dbesc(datetime_convert()),
 431                                         dbesc(datetime_convert()),
 432                                         dbesc(datetime_convert()),
 433                                         intval($contact_id)
 434                                 );
 435                         }
 436
 437                         // contact is created. Now create an introduction
 438
 439                         $hash = random_string();
 440
 441                         $r = q("INSERT INTO `intro` ( `uid`, `contact-id`, knowyou, note, hash, datetime, blocked )
 442                                 VALUES( %d , %d, %d, '%s', '%s', '%s', %d ) ",
 443                                 intval($uid),
 444                                 intval($contact_id),
 445                                 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 446                                 dbesc(notags(trim($_POST['dfrn-request-message']))),
 447                                 dbesc($hash),
 448                                 dbesc(datetime_convert()),
 449                                 1
 450                         );
 451
 452                         // Next send an email verify form to the requestor.
 453
 454                 } else {
 455                         // Detect the network
 456                         $data = Probe::uri($url);
 457                         $network = $data["network"];
 458
 459                         // Canonicalise email-style profile locator
 460                         $url = Probe::webfingerDfrn($url,$hcard);
 461
 462                         if (substr($url,0,5) === 'stat:') {
 463
 464                                 // Every time we detect the remote subscription we define this as OStatus.
 465                                 // We do this even if it is not OStatus.
 466                                 // we only need to pass this through another section of the code.
 467                                 if ($network != NETWORK_DIASPORA)
 468                                         $network = NETWORK_OSTATUS;
 469
 470                                 $url = substr($url,5);
 471                         } else
 472                                 $network = NETWORK_DFRN;
 473                 }
 474
 475                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 476
 477                 if($network === NETWORK_DFRN) {
 478                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 479                                 intval($uid),
 480                                 dbesc($url)
 481                         );
 482
 483                         if (DBM::is_result($ret)) {
 484                                 if(strlen($ret[0]['issued-id'])) {
 485                                         notice( t('You have already introduced yourself here.') . EOL );
 486                                         return;
 487                                 }
 488                                 elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 489                                         notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
 490                                         return;
 491                                 }
 492                                 else {
 493                                         $contact_record = $ret[0];
 494                                         $parms = array('dfrn-request' => $ret[0]['request']);
 495                                 }
 496                         }
 497
 498                         $issued_id = random_string();
 499
 500                         if(is_array($contact_record)) {
 501                                 // There is a contact record but no issued-id, so this
 502                                 // is a reciprocal introduction from a known contact
 503                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 504                                         dbesc($issued_id),
 505                                         intval($contact_record['id'])
 506                                 );
 507                         }
 508                         else {
 509                                 if (! validate_url($url)) {
 510                                         notice( t('Invalid profile URL.') . EOL);
 511                                         goaway(System::baseUrl() . '/' . $a->cmd);
 512                                         return; // NOTREACHED
 513                                 }
 514
 515                                 if (! allowed_url($url)) {
 516                                         notice( t('Disallowed profile URL.') . EOL);
 517                                         goaway(System::baseUrl() . '/' . $a->cmd);
 518                                         return; // NOTREACHED
 519                                 }
 520
 521                                 if (blocked_url($url)) {
 522                                         notice( t('Blocked domain') . EOL);
 523                                         goaway(System::baseUrl() . '/' . $a->cmd);
 524                                         return; // NOTREACHED
 525                                 }
 526
 527                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 528
 529                                 if (! count($parms)) {
 530                                         notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 531                                         goaway(System::baseUrl() . '/' . $a->cmd);
 532                                 }
 533                                 else {
 534                                         if (! x($parms,'fn')) {
 535                                                 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 536                                         }
 537                                         if (! x($parms,'photo')) {
 538                                                 notice( t('Warning: profile location has no profile photo.') . EOL );
 539                                         }
 540                                         $invalid = Probe::validDfrn($parms);
 541                                         if ($invalid) {
 542                                                 notice( sprintf( tt("%d required parameter was not found at the given location",
 543                                                                                         "%d required parameters were not found at the given location",
 544                                                                                         $invalid), $invalid) . EOL );
 545
 546                                                 return;
 547                                         }
 548                                 }
 549
 550
 551                                 $parms['url'] = $url;
 552                                 $parms['issued-id'] = $issued_id;
 553                                 $photo = $parms["photo"];
 554
 555                                 DBM::esc_array($parms);
 556                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 557                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 558                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 559                                         intval($uid),
 560                                         dbesc(datetime_convert()),
 561                                         $parms['url'],
 562                                         dbesc(normalise_link($url)),
 563                                         $parms['addr'],
 564                                         $parms['fn'],
 565                                         $parms['nick'],
 566                                         $parms['issued-id'],
 567                                         $parms['photo'],
 568                                         $parms['key'],
 569                                         $parms['dfrn-request'],
 570                                         $parms['dfrn-confirm'],
 571                                         $parms['dfrn-notify'],
 572                                         $parms['dfrn-poll'],
 573                                         $parms['dfrn-poco'],
 574                                         dbesc(NETWORK_DFRN),
 575                                         intval($blocked),
 576                                         intval($pending)
 577                                 );
 578
 579                                 // find the contact record we just created
 580                                 if ($r) {
 581                                         $r = q("SELECT `id` FROM `contact`
 582                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 583                                                 intval($uid),
 584                                                 $parms['url'],
 585                                                 $parms['issued-id']
 586                                         );
 587                                         if (DBM::is_result($r)) {
 588                                                 $contact_record = $r[0];
 589                                                 Contact::updateAvatar($photo, $uid, $contact_record["id"], true);
 590                                         }
 591                                 }
 592
 593                         }
 594                         if ($r === false) {
 595                                 notice( t('Failed to update contact record.') . EOL );
 596                                 return;
 597                         }
 598
 599                         $hash = random_string() . (string) time();   // Generate a confirm_key
 600
 601                         if (is_array($contact_record)) {
 602                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 603                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 604                                         intval($uid),
 605                                         intval($contact_record['id']),
 606                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 607                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 608                                         dbesc($hash),
 609                                         dbesc(datetime_convert())
 610                                 );
 611                         }
 612
 613                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 614
 615                         if (! $failed) {
 616                                 info( t('Your introduction has been sent.') . EOL );
 617                         }
 618
 619                         // "Homecoming" - send the requestor back to their site to record the introduction.
 620
 621                         $dfrn_url = bin2hex(System::baseUrl() . '/profile/' . $nickname);
 622                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 623
 624                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 625                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 626                                 . '&confirm_key='  . $hash
 627                                 . (($aes_allow) ? "&aes_allow=1" : "")
 628                         );
 629                         // NOTREACHED
 630                         // END $network === NETWORK_DFRN
 631                 } elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 632
 633                         /*
 634                          *
 635                          * Substitute our user's feed URL into $url template
 636                          * Send the subscriber home to subscribe
 637                          *
 638                          */
 639
 640                         // Diaspora needs the uri in the format user@domain.tld
 641                         // Diaspora will support the remote subscription in a future version
 642                         if ($network == NETWORK_DIASPORA) {
 643                                 $uri = $nickname.'@'.$a->get_hostname();
 644
 645                                 if ($a->get_path())
 646                                         $uri .= '/'.$a->get_path();
 647
 648                                 $uri = urlencode($uri);
 649                         } else {
 650                                 $uri = System::baseUrl().'/profile/'.$nickname;
 651                         }
 652
 653                         $url = str_replace('{uri}', $uri, $url);
 654                         goaway($url);
 655                         // NOTREACHED
 656                         // END $network != NETWORK_PHANTOM
 657                 } else {
 658                         notice(t("Remote subscription can't be done for your network. Please subscribe directly on your system.").EOL);
 659                         return;
 660                 }
 661
 662         }       return;
 663 }
 664
 665
 666 function dfrn_request_content(App $a) {
 667
 668         if (($a->argc != 2) || (! count($a->profile))) {
 669                 return "";
 670         }
 671
 672
 673         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 674         // to send us to the post section to record the introduction.
 675
 676         if (x($_GET,'dfrn_url')) {
 677
 678                 if (! local_user()) {
 679                         info( t("Please login to confirm introduction.") . EOL );
 680                         /* setup the return URL to come back to this page if they use openid */
 681                         $_SESSION['return_url'] = $a->query_string;
 682                         return login();
 683                 }
 684
 685                 // Edge case, but can easily happen in the wild. This person is authenticated,
 686                 // but not as the person who needs to deal with this request.
 687
 688                 if ($a->user['nickname'] != $a->argv[1]) {
 689                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 690                         return login();
 691                 }
 692
 693                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 694                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 695                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 696
 697                 // Checking fastlane for validity
 698                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 699                         $_POST["dfrn_url"] = $dfrn_url;
 700                         $_POST["confirm_key"] = $confirm_key;
 701                         $_POST["localconfirm"] = 1;
 702                         $_POST["hidden-contact"] = 0;
 703                         $_POST["submit"] = t('Confirm');
 704
 705                         dfrn_request_post($a);
 706
 707                         killme();
 708                         return; // NOTREACHED
 709                 }
 710
 711                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 712                 $o  = replace_macros($tpl,array(
 713                         '$dfrn_url' => $dfrn_url,
 714                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 715                         '$hidethem' => t('Hide this contact'),
 716                         '$hidechecked' => '',
 717                         '$confirm_key' => $confirm_key,
 718                         '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
 719                         '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
 720                         '$submit' => t('Confirm'),
 721                         '$uid' => $_SESSION['uid'],
 722                         '$nickname' => $a->user['nickname'],
 723                         'dfrn_rawurl' => $_GET['dfrn_url']
 724                         ));
 725                 return $o;
 726
 727         }
 728         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 729
 730                 // we are the requestee and it is now safe to send our user their introduction,
 731                 // We could just unblock it, but first we have to jump through a few hoops to
 732                 // send an email, or even to find out if we need to send an email.
 733
 734                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 735                         dbesc($_GET['confirm_key'])
 736                 );
 737
 738                 if (DBM::is_result($intro)) {
 739
 740                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 741                                 WHERE `contact`.`id` = %d LIMIT 1",
 742                                 intval($intro[0]['contact-id'])
 743                         );
 744
 745                         $auto_confirm = false;
 746
 747                         if (DBM::is_result($r)) {
 748                                 if(($r[0]['page-flags'] != PAGE_NORMAL) && ($r[0]['page-flags'] != PAGE_PRVGROUP))
 749                                         $auto_confirm = true;
 750
 751                                 if(! $auto_confirm) {
 752
 753                                         notification(array(
 754                                                 'type'         => NOTIFY_INTRO,
 755                                                 'notify_flags' => $r[0]['notify-flags'],
 756                                                 'language'     => $r[0]['language'],
 757                                                 'to_name'      => $r[0]['username'],
 758                                                 'to_email'     => $r[0]['email'],
 759                                                 'uid'          => $r[0]['uid'],
 760                                                 'link'         => System::baseUrl() . '/notifications/intros',
 761                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 762                                                 'source_link'  => $r[0]['url'],
 763                                                 'source_photo' => $r[0]['photo'],
 764                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 765                                                 'otype'        => 'intro'
 766                                         ));
 767                                 }
 768
 769                                 if($auto_confirm) {
 770                                         require_once 'mod/dfrn_confirm.php';
 771                                         $handsfree = array(
 772                                                 'uid'      => $r[0]['uid'],
 773                                                 'node'     => $r[0]['nickname'],
 774                                                 'dfrn_id'  => $r[0]['issued-id'],
 775                                                 'intro_id' => $intro[0]['id'],
 776                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 777                                                 'activity' => intval(PConfig::get($r[0]['uid'],'system','post_newfriend'))
 778                                         );
 779                                         dfrn_confirm_post($a,$handsfree);
 780                                 }
 781
 782                         }
 783
 784                         if(! $auto_confirm) {
 785
 786                                 // If we are auto_confirming, this record will have already been nuked
 787                                 // in dfrn_confirm_post()
 788
 789                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 790                                         dbesc($_GET['confirm_key'])
 791                                 );
 792                         }
 793                 }
 794
 795                 killme();
 796                 return; // NOTREACHED
 797         }
 798         else {
 799
 800                 /*
 801                  * Normal web request. Display our user's introduction form.
 802                  */
 803
 804                 if((Config::get('system','block_public')) && (! local_user()) && (! remote_user())) {
 805                         if(! Config::get('system','local_block')) {
 806                                 notice( t('Public access denied.') . EOL);
 807                                 return;
 808                         }
 809                 }
 810
 811
 812                 /*
 813                  * Try to auto-fill the profile address
 814                  */
 815
 816                 // At first look if an address was provided
 817                 // Otherwise take the local address
 818                 if (x($_GET,'addr') && ($_GET['addr'] != "")) {
 819                         $myaddr = hex2bin($_GET['addr']);
 820                 } elseif (x($_GET,'address') && ($_GET['address'] != "")) {
 821                         $myaddr = $_GET['address'];
 822                 } elseif (local_user()) {
 823                         if (strlen($a->path)) {
 824                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 825                         } else {
 826                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(),'://') + 3 );
 827                         }
 828                 } else {
 829                         // last, try a zrl
 830                         $myaddr = get_my_url();
 831                 }
 832
 833                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(),'://') + 3 );
 834
 835
 836                 /*
 837                  *
 838                  * The auto_request form only has the profile address
 839                  * because nobody is going to read the comments and
 840                  * it doesn't matter if they know you or not.
 841                  *
 842                  */
 843
 844                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 845                         $tpl = get_markup_template('dfrn_request.tpl');
 846                 } else {
 847                         $tpl = get_markup_template('auto_request.tpl');
 848                 }
 849
 850                 $page_desc = t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 851
 852                 // see if we are allowed to have NETWORK_MAIL2 contacts
 853
 854                 $mail_disabled = ((function_exists('imap_open') && (! Config::get('system','imap_disabled'))) ? 0 : 1);
 855
 856                 if (Config::get('system','dfrn_only')) {
 857                         $mail_disabled = 1;
 858                 }
 859
 860                 if (! $mail_disabled) {
 861                         $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
 862                                 intval($a->profile['uid'])
 863                         );
 864                         if (! DBM::is_result($r)) {
 865                                 $mail_disabled = 1;
 866                         }
 867                 }
 868
 869                 // "coming soon" is disabled for now
 870                 //$emailnet = (($mail_disabled) ? '' : t("<strike>Connect as an email follower</strike> \x28Coming soon\x29"));
 871                 $emailnet = "";
 872
 873                 $invite_desc = sprintf(
 874                         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>.'),
 875                         get_server()
 876                 );
 877
 878                 $o = replace_macros($tpl,array(
 879                         '$header' => t('Friend/Connection Request'),
 880                         '$desc' => t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@identi.ca'),
 881                         '$pls_answer' => t('Please answer the following:'),
 882                         '$does_know_you' => array('knowyou', sprintf(t('Does %s know you?'),$a->profile['name']), false, '', array(t('No'), t('Yes'))),
 883                         /*'$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']),
 884                         '$yes' => t('Yes'),
 885                         '$no' => t('No'), */
 886                         '$add_note' => t('Add a personal note:'),
 887                         '$page_desc' => $page_desc,
 888                         '$friendica' => t('Friendica'),
 889                         '$statusnet' => t('StatusNet/Federated Social Web'),
 890                         '$diaspora' => t('Diaspora'),
 891                         '$diasnote' => sprintf (t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.'),$target_addr),
 892                         '$your_address' => t('Your Identity Address:'),
 893                         '$invite_desc' => $invite_desc,
 894                         '$emailnet' => $emailnet,
 895                         '$submit' => t('Submit Request'),
 896                         '$cancel' => t('Cancel'),
 897                         '$nickname' => $a->argv[1],
 898                         '$name' => $a->profile['name'],
 899                         '$myaddr' => $myaddr
 900                 ));
 901                 return $o;
 902         }
 903
 904         return; // Somebody is fishing.
 905 }