mod/dfrn_request.php

   1 <?php
   2
   3 /**
   4  * @file mod/dfrn_request.php
   5  * @brief Module: dfrn_request
   6  *
   7  * Purpose: Handles communication associated with the issuance of
   8  * friend requests.
   9  *
  10  * @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  11  *    You also find a graphic which describes the confirmation process at
  12  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_request.png
  13  */
  14
  15 use Friendica\App;
  16 use Friendica\Core\Config;
  17 use Friendica\Core\PConfig;
  18 use Friendica\Core\System;
  19 use Friendica\Database\DBM;
  20 use Friendica\Network\Probe;
  21
  22 require_once 'include/enotify.php';
  23 require_once 'include/group.php';
  24
  25 function dfrn_request_init(App $a) {
  26
  27         if($a->argc > 1)
  28                 $which = $a->argv[1];
  29
  30         profile_load($a,$which);
  31         return;
  32 }
  33
  34
  35 /**
  36  * Function: dfrn_request_post
  37  *
  38  * Purpose:
  39  * Handles multiple scenarios.
  40  *
  41  * Scenario 1:
  42  * Clicking 'submit' on a friend request page.
  43  *
  44  * Scenario 2:
  45  * Following Scenario 1, we are brought back to our home site
  46  * in order to link our friend request with our own server cell.
  47  * After logging in, we click 'submit' to approve the linkage.
  48  *
  49  */
  50 function dfrn_request_post(App $a) {
  51
  52         if(($a->argc != 2) || (! count($a->profile))) {
  53                 logger('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
  54                 return;
  55         }
  56
  57
  58         if(x($_POST, 'cancel')) {
  59                 goaway(System::baseUrl());
  60         }
  61
  62
  63         /*
  64          *
  65          * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
  66          * to confirm the request, and then we've clicked submit (perhaps after logging in).
  67          * That brings us here:
  68          *
  69          */
  70
  71         if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  72
  73                 /*
  74                  * Ensure this is a valid request
  75                  */
  76
  77                 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
  78
  79
  80                         $dfrn_url    = notags(trim($_POST['dfrn_url']));
  81                         $aes_allow   = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  82                         $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
  83                         $hidden = ((x($_POST,'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
  84                         $contact_record = null;
  85                         $blocked = 1;
  86                         $pending = 1;
  87
  88                         if(x($dfrn_url)) {
  89
  90                                 /*
  91                                  * Lookup the contact based on their URL (which is the only unique thing we have at the moment)
  92                                  */
  93
  94                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
  95                                         intval(local_user()),
  96                                         dbesc(normalise_link($dfrn_url))
  97                                 );
  98
  99                                 if (DBM::is_result($r)) {
 100                                         if(strlen($r[0]['dfrn-id'])) {
 101
 102                                                 /*
 103                                                  * We don't need to be here. It has already happened.
 104                                                  */
 105
 106                                                 notice( t("This introduction has already been accepted.") . EOL );
 107                                                 return;
 108                                         }
 109                                         else
 110                                                 $contact_record = $r[0];
 111                                 }
 112
 113                                 if(is_array($contact_record)) {
 114                                         $r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
 115                                                 intval($aes_allow),
 116                                                 intval($hidden),
 117                                                 intval($contact_record['id'])
 118                                         );
 119                                 }
 120                                 else {
 121
 122                                         /*
 123                                          * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
 124                                          */
 125
 126                                         $parms = Probe::profile($dfrn_url);
 127
 128                                         if (! count($parms)) {
 129                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 130                                                 return;
 131                                         }
 132                                         else {
 133                                                 if (! x($parms,'fn')) {
 134                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 135                                                 }
 136                                                 if (! x($parms,'photo')) {
 137                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
 138                                                 }
 139                                                 $invalid = Probe::validDfrn($parms);
 140                                                 if ($invalid) {
 141                                                         notice( sprintf( tt("%d required parameter was not found at the given location",
 142                                                                                                 "%d required parameters were not found at the given location",
 143                                                                                                 $invalid), $invalid) . EOL );
 144                                                         return;
 145                                                 }
 146                                         }
 147
 148                                         $dfrn_request = $parms['dfrn-request'];
 149
 150                                         $photo = $parms["photo"];
 151
 152                                         // Escape the entire array
 153                                         DBM::esc_array($parms);
 154
 155                                         /*
 156                                          * Create a contact record on our site for the other person
 157                                          */
 158
 159                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
 160                                                 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
 161                                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
 162                                                 intval(local_user()),
 163                                                 datetime_convert(),
 164                                                 dbesc($dfrn_url),
 165                                                 dbesc(normalise_link($dfrn_url)),
 166                                                 $parms['addr'],
 167                                                 $parms['fn'],
 168                                                 $parms['nick'],
 169                                                 $parms['photo'],
 170                                                 $parms['key'],
 171                                                 $parms['dfrn-request'],
 172                                                 $parms['dfrn-confirm'],
 173                                                 $parms['dfrn-notify'],
 174                                                 $parms['dfrn-poll'],
 175                                                 $parms['dfrn-poco'],
 176                                                 dbesc(NETWORK_DFRN),
 177                                                 intval($aes_allow),
 178                                                 intval($hidden),
 179                                                 intval($blocked),
 180                                                 intval($pending)
 181                                         );
 182                                 }
 183
 184                                 if ($r) {
 185                                         info( t("Introduction complete.") . EOL);
 186                                 }
 187
 188                                 $r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
 189                                         intval(local_user()),
 190                                         dbesc($dfrn_url),
 191                                         $parms['key'] // this was already escaped
 192                                 );
 193                                 if (DBM::is_result($r)) {
 194                                         $def_gid = get_default_group(local_user(), $r[0]["network"]);
 195                                         if(intval($def_gid))
 196                                                 group_add_member(local_user(), '', $r[0]['id'], $def_gid);
 197
 198                                         if (isset($photo))
 199                                                 update_contact_avatar($photo, local_user(), $r[0]["id"], true);
 200
 201                                         $forwardurl = System::baseUrl()."/contacts/".$r[0]['id'];
 202                                 } else {
 203                                         $forwardurl = System::baseUrl()."/contacts";
 204                                 }
 205
 206                                 /*
 207                                  * Allow the blocked remote notification to complete
 208                                  */
 209
 210                                 if (is_array($contact_record)) {
 211                                         $dfrn_request = $contact_record['request'];
 212                                 }
 213
 214                                 if (strlen($dfrn_request) && strlen($confirm_key)) {
 215                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 216                                 }
 217
 218                                 // (ignore reply, nothing we can do it failed)
 219
 220                                 // Old: goaway(zrl($dfrn_url));
 221                                 goaway($forwardurl);
 222                                 return; // NOTREACHED
 223
 224                         }
 225
 226                 }
 227
 228                 // invalid/bogus request
 229
 230                 notice( t('Unrecoverable protocol error.') . EOL );
 231                 goaway(System::baseUrl());
 232                 return; // NOTREACHED
 233         }
 234
 235         /*
 236          * Otherwise:
 237          *
 238          * Scenario 1:
 239          * We are the requestee. A person from a remote cell has made an introduction
 240          * on our profile web page and clicked submit. We will use their DFRN-URL to
 241          * figure out how to contact their cell.
 242          *
 243          * Scrape the originating DFRN-URL for everything we need. Create a contact record
 244          * and an introduction to show our user next time he/she logs in.
 245          * Finally redirect back to the requestor so that their site can record the request.
 246          * If our user (the requestee) later confirms this request, a record of it will need
 247          * to exist on the requestor's cell in order for the confirmation process to complete..
 248          *
 249          * It's possible that neither the requestor or the requestee are logged in at the moment,
 250          * and the requestor does not yet have any credentials to the requestee profile.
 251          *
 252          * Who is the requestee? We've already loaded their profile which means their nickname should be
 253          * in $a->argv[1] and we should have their complete info in $a->profile.
 254          *
 255          */
 256
 257         if(! (is_array($a->profile) && count($a->profile))) {
 258                 notice( t('Profile unavailable.') . EOL);
 259                 return;
 260         }
 261
 262         $nickname       = $a->profile['nickname'];
 263         $notify_flags   = $a->profile['notify-flags'];
 264         $uid            = $a->profile['uid'];
 265         $maxreq         = intval($a->profile['maxreq']);
 266         $contact_record = null;
 267         $failed         = false;
 268         $parms          = null;
 269         $blocked = 1;
 270         $pending = 1;
 271
 272
 273         if( x($_POST,'dfrn_url')) {
 274
 275                 /*
 276                  * Block friend request spam
 277                  */
 278
 279                 if($maxreq) {
 280                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
 281                                 dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
 282                                 intval($uid)
 283                         );
 284                         if (DBM::is_result($r) && count($r) > $maxreq) {
 285                                 notice( sprintf( t('%s has received too many connection requests today.'),  $a->profile['name']) . EOL);
 286                                 notice( t('Spam protection measures have been invoked.') . EOL);
 287                                 notice( t('Friends are advised to please try again in 24 hours.') . EOL);
 288                                 return;
 289                         }
 290                 }
 291
 292                 /*
 293                  *
 294                  * Cleanup old introductions that remain blocked.
 295                  * Also remove the contact record, but only if there is no existing relationship
 296                  * Do not remove email contacts as these may be awaiting email verification
 297                  */
 298
 299                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 300                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 301                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 302                         AND `contact`.`network` != '%s'
 303                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ",
 304                         dbesc(NETWORK_MAIL2)
 305                 );
 306                 if (DBM::is_result($r)) {
 307                         foreach ($r as $rr) {
 308                                 if(! $rr['rel']) {
 309                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 310                                                 intval($rr['cid'])
 311                                         );
 312                                 }
 313                                 q("DELETE FROM `intro` WHERE `id` = %d",
 314                                         intval($rr['iid'])
 315                                 );
 316                         }
 317                 }
 318
 319                 /*
 320                  *
 321                  * Cleanup any old email intros - which will have a greater lifetime
 322                  */
 323
 324                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
 325                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
 326                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
 327                         AND `contact`.`network` = '%s'
 328                         AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 3 DAY ",
 329                         dbesc(NETWORK_MAIL2)
 330                 );
 331                 if (DBM::is_result($r)) {
 332                         foreach ($r as $rr) {
 333                                 if(! $rr['rel']) {
 334                                         q("DELETE FROM `contact` WHERE `id` = %d AND NOT `self`",
 335                                                 intval($rr['cid'])
 336                                         );
 337                                 }
 338                                 q("DELETE FROM `intro` WHERE `id` = %d",
 339                                         intval($rr['iid'])
 340                                 );
 341                         }
 342                 }
 343
 344                 $email_follow = (x($_POST,'email_follow') ? intval($_POST['email_follow']) : 0);
 345                 $real_name = (x($_POST,'realname') ? notags(trim($_POST['realname'])) : '');
 346
 347                 $url = trim($_POST['dfrn_url']);
 348                 if(! strlen($url)) {
 349                         notice( t("Invalid locator") . EOL );
 350                         return;
 351                 }
 352
 353                 $hcard = '';
 354
 355                 if($email_follow) {
 356
 357                         if(! validate_email($url)) {
 358                                 notice( t('Invalid email address.') . EOL);
 359                                 return;
 360                         }
 361
 362                         $addr    = $url;
 363                         $name    = ($realname) ? $realname : $addr;
 364                         $nick    = substr($addr,0,strpos($addr,'@'));
 365                         $url     = 'http://' . substr($addr,strpos($addr,'@') + 1);
 366                         $nurl    = normalise_url($host);
 367                         $poll    = 'email ' . random_string();
 368                         $notify  = 'smtp ' . random_string();
 369                         $network = NETWORK_MAIL2;
 370                         $rel     = CONTACT_IS_FOLLOWER;
 371
 372                         $mail_disabled = ((function_exists('imap_open') && (! Config::get('system','imap_disabled'))) ? 0 : 1);
 373                         if(Config::get('system','dfrn_only'))
 374                                 $mail_disabled = 1;
 375
 376                         if(! $mail_disabled) {
 377                                 $failed = false;
 378                                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
 379                                         intval($uid)
 380                                 );
 381
 382                                 if (! DBM::is_result($r)) {
 383                                         notice( t('This account has not been configured for email. Request failed.') . EOL);
 384                                         return;
 385                                 }
 386                         }
 387
 388                         $r = q("insert into contact ( uid, created, addr, name, nick, url, nurl, poll, notify, blocked, pending, network, rel )
 389                                 values( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', %d ) ",
 390                                 intval($uid),
 391                                 dbesc(datetime_convert()),
 392                                 dbesc($addr),
 393                                 dbesc($name),
 394                                 dbesc($nick),
 395                                 dbesc($url),
 396                                 dbesc($nurl),
 397                                 dbesc($poll),
 398                                 dbesc($notify),
 399                                 intval($blocked),
 400                                 intval($pending),
 401                                 dbesc($network),
 402                                 intval($rel)
 403                         );
 404
 405                         $r = q("SELECT `id`, `network` FROM `contact` WHERE `poll` = '%s' AND `uid` = %d LIMIT 1",
 406                                 dbesc($poll),
 407                                 intval($uid)
 408                         );
 409                         if (DBM::is_result($r)) {
 410                                 $contact_id = $r[0]['id'];
 411
 412                                 $def_gid = get_default_group($uid, $r[0]["network"]);
 413                                 if (intval($def_gid))
 414                                         group_add_member($uid, '', $contact_id, $def_gid);
 415
 416                                 $photo = avatar_img($addr);
 417
 418                                 $r = q("UPDATE `contact` SET
 419                                         `photo` = '%s',
 420                                         `thumb` = '%s',
 421                                         `micro` = '%s',
 422                                         `name-date` = '%s',
 423                                         `uri-date` = '%s',
 424                                         `avatar-date` = '%s',
 425                                         `hidden` = 0,
 426                                         WHERE `id` = %d
 427                                 ",
 428                                         dbesc($photos[0]),
 429                                         dbesc($photos[1]),
 430                                         dbesc($photos[2]),
 431                                         dbesc(datetime_convert()),
 432                                         dbesc(datetime_convert()),
 433                                         dbesc(datetime_convert()),
 434                                         intval($contact_id)
 435                                 );
 436                         }
 437
 438                         // contact is created. Now create an introduction
 439
 440                         $hash = random_string();
 441
 442                         $r = q("INSERT INTO `intro` ( `uid`, `contact-id`, knowyou, note, hash, datetime, blocked )
 443                                 VALUES( %d , %d, %d, '%s', '%s', '%s', %d ) ",
 444                                 intval($uid),
 445                                 intval($contact_id),
 446                                 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 447                                 dbesc(notags(trim($_POST['dfrn-request-message']))),
 448                                 dbesc($hash),
 449                                 dbesc(datetime_convert()),
 450                                 1
 451                         );
 452
 453                         // Next send an email verify form to the requestor.
 454
 455                 } else {
 456                         // Detect the network
 457                         $data = Probe::uri($url);
 458                         $network = $data["network"];
 459
 460                         // Canonicalise email-style profile locator
 461                         $url = Probe::webfingerDfrn($url,$hcard);
 462
 463                         if (substr($url,0,5) === 'stat:') {
 464
 465                                 // Every time we detect the remote subscription we define this as OStatus.
 466                                 // We do this even if it is not OStatus.
 467                                 // we only need to pass this through another section of the code.
 468                                 if ($network != NETWORK_DIASPORA)
 469                                         $network = NETWORK_OSTATUS;
 470
 471                                 $url = substr($url,5);
 472                         } else
 473                                 $network = NETWORK_DFRN;
 474                 }
 475
 476                 logger('dfrn_request: url: ' . $url . ',network=' . $network, LOGGER_DEBUG);
 477
 478                 if($network === NETWORK_DFRN) {
 479                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
 480                                 intval($uid),
 481                                 dbesc($url)
 482                         );
 483
 484                         if (DBM::is_result($ret)) {
 485                                 if(strlen($ret[0]['issued-id'])) {
 486                                         notice( t('You have already introduced yourself here.') . EOL );
 487                                         return;
 488                                 }
 489                                 elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) {
 490                                         notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
 491                                         return;
 492                                 }
 493                                 else {
 494                                         $contact_record = $ret[0];
 495                                         $parms = array('dfrn-request' => $ret[0]['request']);
 496                                 }
 497                         }
 498
 499                         $issued_id = random_string();
 500
 501                         if(is_array($contact_record)) {
 502                                 // There is a contact record but no issued-id, so this
 503                                 // is a reciprocal introduction from a known contact
 504                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
 505                                         dbesc($issued_id),
 506                                         intval($contact_record['id'])
 507                                 );
 508                         }
 509                         else {
 510                                 if (! validate_url($url)) {
 511                                         notice( t('Invalid profile URL.') . EOL);
 512                                         goaway(System::baseUrl() . '/' . $a->cmd);
 513                                         return; // NOTREACHED
 514                                 }
 515
 516                                 if (! allowed_url($url)) {
 517                                         notice( t('Disallowed profile URL.') . EOL);
 518                                         goaway(System::baseUrl() . '/' . $a->cmd);
 519                                         return; // NOTREACHED
 520                                 }
 521
 522                                 if (blocked_url($url)) {
 523                                         notice( t('Blocked domain') . EOL);
 524                                         goaway(System::baseUrl() . '/' . $a->cmd);
 525                                         return; // NOTREACHED
 526                                 }
 527
 528                                 $parms = Probe::profile(($hcard) ? $hcard : $url);
 529
 530                                 if (! count($parms)) {
 531                                         notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 532                                         goaway(System::baseUrl() . '/' . $a->cmd);
 533                                 }
 534                                 else {
 535                                         if (! x($parms,'fn')) {
 536                                                 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 537                                         }
 538                                         if (! x($parms,'photo')) {
 539                                                 notice( t('Warning: profile location has no profile photo.') . EOL );
 540                                         }
 541                                         $invalid = Probe::validDfrn($parms);
 542                                         if ($invalid) {
 543                                                 notice( sprintf( tt("%d required parameter was not found at the given location",
 544                                                                                         "%d required parameters were not found at the given location",
 545                                                                                         $invalid), $invalid) . EOL );
 546
 547                                                 return;
 548                                         }
 549                                 }
 550
 551
 552                                 $parms['url'] = $url;
 553                                 $parms['issued-id'] = $issued_id;
 554                                 $photo = $parms["photo"];
 555
 556                                 DBM::esc_array($parms);
 557                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `addr`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
 558                                         `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `blocked`, `pending` )
 559                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d )",
 560                                         intval($uid),
 561                                         dbesc(datetime_convert()),
 562                                         $parms['url'],
 563                                         dbesc(normalise_link($url)),
 564                                         $parms['addr'],
 565                                         $parms['fn'],
 566                                         $parms['nick'],
 567                                         $parms['issued-id'],
 568                                         $parms['photo'],
 569                                         $parms['key'],
 570                                         $parms['dfrn-request'],
 571                                         $parms['dfrn-confirm'],
 572                                         $parms['dfrn-notify'],
 573                                         $parms['dfrn-poll'],
 574                                         $parms['dfrn-poco'],
 575                                         dbesc(NETWORK_DFRN),
 576                                         intval($blocked),
 577                                         intval($pending)
 578                                 );
 579
 580                                 // find the contact record we just created
 581                                 if ($r) {
 582                                         $r = q("SELECT `id` FROM `contact`
 583                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 584                                                 intval($uid),
 585                                                 $parms['url'],
 586                                                 $parms['issued-id']
 587                                         );
 588                                         if (DBM::is_result($r)) {
 589                                                 $contact_record = $r[0];
 590                                                 update_contact_avatar($photo, $uid, $contact_record["id"], true);
 591                                         }
 592                                 }
 593
 594                         }
 595                         if ($r === false) {
 596                                 notice( t('Failed to update contact record.') . EOL );
 597                                 return;
 598                         }
 599
 600                         $hash = random_string() . (string) time();   // Generate a confirm_key
 601
 602                         if (is_array($contact_record)) {
 603                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 604                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 605                                         intval($uid),
 606                                         intval($contact_record['id']),
 607                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 608                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 609                                         dbesc($hash),
 610                                         dbesc(datetime_convert())
 611                                 );
 612                         }
 613
 614                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
 615
 616                         if (! $failed) {
 617                                 info( t('Your introduction has been sent.') . EOL );
 618                         }
 619
 620                         // "Homecoming" - send the requestor back to their site to record the introduction.
 621
 622                         $dfrn_url = bin2hex(System::baseUrl() . '/profile/' . $nickname);
 623                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 624
 625                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 626                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 627                                 . '&confirm_key='  . $hash
 628                                 . (($aes_allow) ? "&aes_allow=1" : "")
 629                         );
 630                         // NOTREACHED
 631                         // END $network === NETWORK_DFRN
 632                 } elseif (($network != NETWORK_PHANTOM) && ($url != "")) {
 633
 634                         /*
 635                          *
 636                          * Substitute our user's feed URL into $url template
 637                          * Send the subscriber home to subscribe
 638                          *
 639                          */
 640
 641                         // Diaspora needs the uri in the format user@domain.tld
 642                         // Diaspora will support the remote subscription in a future version
 643                         if ($network == NETWORK_DIASPORA) {
 644                                 $uri = $nickname.'@'.$a->get_hostname();
 645
 646                                 if ($a->get_path())
 647                                         $uri .= '/'.$a->get_path();
 648
 649                                 $uri = urlencode($uri);
 650                         } else {
 651                                 $uri = System::baseUrl().'/profile/'.$nickname;
 652                         }
 653
 654                         $url = str_replace('{uri}', $uri, $url);
 655                         goaway($url);
 656                         // NOTREACHED
 657                         // END $network != NETWORK_PHANTOM
 658                 } else {
 659                         notice(t("Remote subscription can't be done for your network. Please subscribe directly on your system.").EOL);
 660                         return;
 661                 }
 662
 663         }       return;
 664 }
 665
 666
 667 function dfrn_request_content(App $a) {
 668
 669         if (($a->argc != 2) || (! count($a->profile))) {
 670                 return "";
 671         }
 672
 673
 674         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 675         // to send us to the post section to record the introduction.
 676
 677         if (x($_GET,'dfrn_url')) {
 678
 679                 if (! local_user()) {
 680                         info( t("Please login to confirm introduction.") . EOL );
 681                         /* setup the return URL to come back to this page if they use openid */
 682                         $_SESSION['return_url'] = $a->query_string;
 683                         return login();
 684                 }
 685
 686                 // Edge case, but can easily happen in the wild. This person is authenticated,
 687                 // but not as the person who needs to deal with this request.
 688
 689                 if ($a->user['nickname'] != $a->argv[1]) {
 690                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 691                         return login();
 692                 }
 693
 694                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 695                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 696                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 697
 698                 // Checking fastlane for validity
 699                 if (x($_SESSION, "fastlane") && (normalise_link($_SESSION["fastlane"]) == normalise_link($dfrn_url))) {
 700                         $_POST["dfrn_url"] = $dfrn_url;
 701                         $_POST["confirm_key"] = $confirm_key;
 702                         $_POST["localconfirm"] = 1;
 703                         $_POST["hidden-contact"] = 0;
 704                         $_POST["submit"] = t('Confirm');
 705
 706                         dfrn_request_post($a);
 707
 708                         killme();
 709                         return; // NOTREACHED
 710                 }
 711
 712                 $tpl = get_markup_template("dfrn_req_confirm.tpl");
 713                 $o  = replace_macros($tpl,array(
 714                         '$dfrn_url' => $dfrn_url,
 715                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 716                         '$hidethem' => t('Hide this contact'),
 717                         '$hidechecked' => '',
 718                         '$confirm_key' => $confirm_key,
 719                         '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
 720                         '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
 721                         '$submit' => t('Confirm'),
 722                         '$uid' => $_SESSION['uid'],
 723                         '$nickname' => $a->user['nickname'],
 724                         'dfrn_rawurl' => $_GET['dfrn_url']
 725                         ));
 726                 return $o;
 727
 728         }
 729         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 730
 731                 // we are the requestee and it is now safe to send our user their introduction,
 732                 // We could just unblock it, but first we have to jump through a few hoops to
 733                 // send an email, or even to find out if we need to send an email.
 734
 735                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 736                         dbesc($_GET['confirm_key'])
 737                 );
 738
 739                 if (DBM::is_result($intro)) {
 740
 741                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 742                                 WHERE `contact`.`id` = %d LIMIT 1",
 743                                 intval($intro[0]['contact-id'])
 744                         );
 745
 746                         $auto_confirm = false;
 747
 748                         if (DBM::is_result($r)) {
 749                                 if(($r[0]['page-flags'] != PAGE_NORMAL) && ($r[0]['page-flags'] != PAGE_PRVGROUP))
 750                                         $auto_confirm = true;
 751
 752                                 if(! $auto_confirm) {
 753
 754                                         notification(array(
 755                                                 'type'         => NOTIFY_INTRO,
 756                                                 'notify_flags' => $r[0]['notify-flags'],
 757                                                 'language'     => $r[0]['language'],
 758                                                 'to_name'      => $r[0]['username'],
 759                                                 'to_email'     => $r[0]['email'],
 760                                                 'uid'          => $r[0]['uid'],
 761                                                 'link'         => System::baseUrl() . '/notifications/intros',
 762                                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 763                                                 'source_link'  => $r[0]['url'],
 764                                                 'source_photo' => $r[0]['photo'],
 765                                                 'verb'         => ACTIVITY_REQ_FRIEND,
 766                                                 'otype'        => 'intro'
 767                                         ));
 768                                 }
 769
 770                                 if($auto_confirm) {
 771                                         require_once 'mod/dfrn_confirm.php';
 772                                         $handsfree = array(
 773                                                 'uid'      => $r[0]['uid'],
 774                                                 'node'     => $r[0]['nickname'],
 775                                                 'dfrn_id'  => $r[0]['issued-id'],
 776                                                 'intro_id' => $intro[0]['id'],
 777                                                 'duplex'   => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0),
 778                                                 'activity' => intval(PConfig::get($r[0]['uid'],'system','post_newfriend'))
 779                                         );
 780                                         dfrn_confirm_post($a,$handsfree);
 781                                 }
 782
 783                         }
 784
 785                         if(! $auto_confirm) {
 786
 787                                 // If we are auto_confirming, this record will have already been nuked
 788                                 // in dfrn_confirm_post()
 789
 790                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s'",
 791                                         dbesc($_GET['confirm_key'])
 792                                 );
 793                         }
 794                 }
 795
 796                 killme();
 797                 return; // NOTREACHED
 798         }
 799         else {
 800
 801                 /*
 802                  * Normal web request. Display our user's introduction form.
 803                  */
 804
 805                 if((Config::get('system','block_public')) && (! local_user()) && (! remote_user())) {
 806                         if(! Config::get('system','local_block')) {
 807                                 notice( t('Public access denied.') . EOL);
 808                                 return;
 809                         }
 810                 }
 811
 812
 813                 /*
 814                  * Try to auto-fill the profile address
 815                  */
 816
 817                 // At first look if an address was provided
 818                 // Otherwise take the local address
 819                 if (x($_GET,'addr') && ($_GET['addr'] != "")) {
 820                         $myaddr = hex2bin($_GET['addr']);
 821                 } elseif (x($_GET,'address') && ($_GET['address'] != "")) {
 822                         $myaddr = $_GET['address'];
 823                 } elseif (local_user()) {
 824                         if (strlen($a->path)) {
 825                                 $myaddr = System::baseUrl() . '/profile/' . $a->user['nickname'];
 826                         } else {
 827                                 $myaddr = $a->user['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(),'://') + 3 );
 828                         }
 829                 } else {
 830                         // last, try a zrl
 831                         $myaddr = get_my_url();
 832                 }
 833
 834                 $target_addr = $a->profile['nickname'] . '@' . substr(System::baseUrl(), strpos(System::baseUrl(),'://') + 3 );
 835
 836
 837                 /*
 838                  *
 839                  * The auto_request form only has the profile address
 840                  * because nobody is going to read the comments and
 841                  * it doesn't matter if they know you or not.
 842                  *
 843                  */
 844
 845                 if ($a->profile['page-flags'] == PAGE_NORMAL) {
 846                         $tpl = get_markup_template('dfrn_request.tpl');
 847                 } else {
 848                         $tpl = get_markup_template('auto_request.tpl');
 849                 }
 850
 851                 $page_desc = t("Please enter your 'Identity Address' from one of the following supported communications networks:");
 852
 853                 // see if we are allowed to have NETWORK_MAIL2 contacts
 854
 855                 $mail_disabled = ((function_exists('imap_open') && (! Config::get('system','imap_disabled'))) ? 0 : 1);
 856
 857                 if (Config::get('system','dfrn_only')) {
 858                         $mail_disabled = 1;
 859                 }
 860
 861                 if (! $mail_disabled) {
 862                         $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
 863                                 intval($a->profile['uid'])
 864                         );
 865                         if (! DBM::is_result($r)) {
 866                                 $mail_disabled = 1;
 867                         }
 868                 }
 869
 870                 // "coming soon" is disabled for now
 871                 //$emailnet = (($mail_disabled) ? '' : t("<strike>Connect as an email follower</strike> \x28Coming soon\x29"));
 872                 $emailnet = "";
 873
 874                 $invite_desc = sprintf(
 875                         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>.'),
 876                         get_server()
 877                 );
 878
 879                 $o = replace_macros($tpl,array(
 880                         '$header' => t('Friend/Connection Request'),
 881                         '$desc' => t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@identi.ca'),
 882                         '$pls_answer' => t('Please answer the following:'),
 883                         '$does_know_you' => array('knowyou', sprintf(t('Does %s know you?'),$a->profile['name']), false, '', array(t('No'), t('Yes'))),
 884                         /*'$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']),
 885                         '$yes' => t('Yes'),
 886                         '$no' => t('No'), */
 887                         '$add_note' => t('Add a personal note:'),
 888                         '$page_desc' => $page_desc,
 889                         '$friendica' => t('Friendica'),
 890                         '$statusnet' => t('StatusNet/Federated Social Web'),
 891                         '$diaspora' => t('Diaspora'),
 892                         '$diasnote' => sprintf (t(' - please do not use this form.  Instead, enter %s into your Diaspora search bar.'),$target_addr),
 893                         '$your_address' => t('Your Identity Address:'),
 894                         '$invite_desc' => $invite_desc,
 895                         '$emailnet' => $emailnet,
 896                         '$submit' => t('Submit Request'),
 897                         '$cancel' => t('Cancel'),
 898                         '$nickname' => $a->argv[1],
 899                         '$name' => $a->profile['name'],
 900                         '$myaddr' => $myaddr
 901                 ));
 902                 return $o;
 903         }
 904
 905         return; // Somebody is fishing.
 906 }