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