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