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