mod/dfrn_request.php

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