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