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