mod/dfrn_request.php

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