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