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