7 * Purpose: Handles communication associated with the issuance of
12 if(! function_exists('dfrn_request_init')) {
13 function dfrn_request_init(&$a) {
18 profile_load($a,$which);
24 * Function: dfrn_request_post
27 * Handles multiple scenarios.
30 * Clicking 'submit' on a friend request page.
33 * Following Scenario 1, we are brought back to our home site
34 * in order to link our friend request with our own server cell.
35 * After logging in, we click 'submit' to approve the linkage.
39 if(! function_exists('dfrn_request_post')) {
40 function dfrn_request_post(&$a) {
42 if(($a->argc != 2) || (! count($a->profile)))
46 if(x($_POST, 'cancel')) {
53 * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
54 * to confirm the request, and then we've clicked submit (perhaps after logging in).
55 * That brings us here:
59 if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
62 * Ensure this is a valid request
65 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
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'] : "");
72 $contact_record = null;
77 * Lookup the contact based on their URL (which is the only unique thing we have at the moment)
80 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND (`url` = '%s' OR `nurl` = '%s') AND `self` = 0 LIMIT 1",
83 dbesc(normalise_link($dfrn_url))
87 if(strlen($r[0]['dfrn-id'])) {
90 * We don't need to be here. It has already happened.
93 notice( t("This introduction has already been accepted.") . EOL );
97 $contact_record = $r[0];
100 if(is_array($contact_record)) {
101 $r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
103 intval($contact_record['id'])
109 * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
112 require_once('Scrape.php');
114 $parms = scrape_dfrn($dfrn_url);
116 if(! count($parms)) {
117 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
122 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
123 if(! x($parms,'photo'))
124 notice( t('Warning: profile location has no profile photo.') . EOL );
125 $invalid = validate_dfrn($parms);
127 notice( sprintf( tt("%d required parameter was not found at the given location",
128 "%d required parameters were not found at the given location",
129 $invalid), $invalid) . EOL );
134 $dfrn_request = $parms['dfrn-request'];
136 /********* Escape the entire array ********/
140 /******************************************/
143 * Create a contact record on our site for the other person
146 $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `name`, `nick`, `photo`, `site-pubkey`,
147 `request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`)
148 VALUES ( %d, '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d)",
149 intval(local_user()),
152 dbesc(normalise_link($dfrn_url)),
157 $parms['dfrn-request'],
158 $parms['dfrn-confirm'],
159 $parms['dfrn-notify'],
168 info( t("Introduction complete.") . EOL);
172 * Allow the blocked remote notification to complete
175 if(is_array($contact_record))
176 $dfrn_request = $contact_record['request'];
178 if(strlen($dfrn_request) && strlen($confirm_key))
179 $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
181 // (ignore reply, nothing we can do it failed)
183 goaway(zrl($dfrn_url));
184 return; // NOTREACHED
190 // invalid/bogus request
192 notice( t('Unrecoverable protocol error.') . EOL );
194 return; // NOTREACHED
201 * We are the requestee. A person from a remote cell has made an introduction
202 * on our profile web page and clicked submit. We will use their DFRN-URL to
203 * figure out how to contact their cell.
205 * Scrape the originating DFRN-URL for everything we need. Create a contact record
206 * and an introduction to show our user next time he/she logs in.
207 * Finally redirect back to the requestor so that their site can record the request.
208 * If our user (the requestee) later confirms this request, a record of it will need
209 * to exist on the requestor's cell in order for the confirmation process to complete..
211 * It's possible that neither the requestor or the requestee are logged in at the moment,
212 * and the requestor does not yet have any credentials to the requestee profile.
214 * Who is the requestee? We've already loaded their profile which means their nickname should be
215 * in $a->argv[1] and we should have their complete info in $a->profile.
219 if(! (is_array($a->profile) && count($a->profile))) {
220 notice( t('Profile unavailable.') . EOL);
224 $nickname = $a->profile['nickname'];
225 $notify_flags = $a->profile['notify-flags'];
226 $uid = $a->profile['uid'];
227 $maxreq = intval($a->profile['maxreq']);
228 $contact_record = null;
233 if( x($_POST,'dfrn_url')) {
236 * Block friend request spam
240 $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
241 dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
244 if(count($r) > $maxreq) {
245 notice( sprintf( t('%s has received too many connection requests today.'), $a->profile['name']) . EOL);
246 notice( t('Spam protection measures have been invoked.') . EOL);
247 notice( t('Friends are advised to please try again in 24 hours.') . EOL);
254 * Cleanup old introductions that remain blocked.
255 * Also remove the contact record, but only if there is no existing relationship
256 * Do not remove email contacts as these may be awaiting email verification
259 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
260 FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
261 WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
262 AND `contact`.`network` != '%s'
263 AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ",
269 q("DELETE FROM `contact` WHERE `id` = %d LIMIT 1",
273 q("DELETE FROM `intro` WHERE `id` = %d LIMIT 1",
281 * Cleanup any old email intros - which will have a greater lifetime
284 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
285 FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
286 WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
287 AND `contact`.`network` = '%s'
288 AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 3 DAY ",
294 q("DELETE FROM `contact` WHERE `id` = %d LIMIT 1",
298 q("DELETE FROM `intro` WHERE `id` = %d LIMIT 1",
305 $url = trim($_POST['dfrn_url']);
307 notice( t("Invalid locator") . EOL );
311 // Canonicalise email-style profile locator
314 $url = webfinger_dfrn($url,$hcard);
316 if(substr($url,0,5) === 'stat:') {
317 $network = NETWORK_OSTATUS;
318 $url = substr($url,5);
321 $network = NETWORK_DFRN;
324 logger('dfrn_request: url: ' . $url);
327 notice( t("Unable to resolve your name at the provided location.") . EOL);
332 if($network === NETWORK_DFRN) {
333 $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
339 if(strlen($ret[0]['issued-id'])) {
340 notice( t('You have already introduced yourself here.') . EOL );
343 elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) {
344 notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
348 $contact_record = $ret[0];
349 $parms = array('dfrn-request' => $ret[0]['request']);
353 $issued_id = random_string();
355 if(is_array($contact_record)) {
356 // There is a contact record but no issued-id, so this
357 // is a reciprocal introduction from a known contact
358 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
360 intval($contact_record['id'])
364 if(! validate_url($url)) {
365 notice( t('Invalid profile URL.') . EOL);
366 goaway($a->get_baseurl() . '/' . $a->cmd);
367 return; // NOTREACHED
370 if(! allowed_url($url)) {
371 notice( t('Disallowed profile URL.') . EOL);
372 goaway($a->get_baseurl() . '/' . $a->cmd);
373 return; // NOTREACHED
377 require_once('Scrape.php');
379 $parms = scrape_dfrn(($hcard) ? $hcard : $url);
381 if(! count($parms)) {
382 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
383 goaway($a->get_baseurl() . '/' . $a->cmd);
387 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
388 if(! x($parms,'photo'))
389 notice( t('Warning: profile location has no profile photo.') . EOL );
390 $invalid = validate_dfrn($parms);
392 notice( sprintf( tt("%d required parameter was not found at the given location",
393 "%d required parameters were not found at the given location",
394 $invalid), $invalid) . EOL );
401 $parms['url'] = $url;
402 $parms['issued-id'] = $issued_id;
406 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`,`name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
407 `request`, `confirm`, `notify`, `poll`, `poco`, `network` )
408 VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
410 dbesc(datetime_convert()),
412 dbesc(normalise_link($parms['url'])),
418 $parms['dfrn-request'],
419 $parms['dfrn-confirm'],
420 $parms['dfrn-notify'],
426 // find the contact record we just created
428 $r = q("SELECT `id` FROM `contact`
429 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
435 $contact_record = $r[0];
440 notice( t('Failed to update contact record.') . EOL );
444 $hash = random_string() . (string) time(); // Generate a confirm_key
446 if(is_array($contact_record)) {
447 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
448 VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
450 intval($contact_record['id']),
451 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
452 dbesc(notags(trim($_POST['dfrn-request-message']))),
454 dbesc(datetime_convert())
458 // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
461 info( t('Your introduction has been sent.') . EOL );
463 // "Homecoming" - send the requestor back to their site to record the introduction.
465 $dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
466 $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
468 goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
469 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
470 . '&confirm_key=' . $hash
471 . (($aes_allow) ? "&aes_allow=1" : "")
474 // END $network === NETWORK_DFRN
476 elseif($network === NETWORK_OSTATUS) {
481 * Check contact existence
482 * Try and scrape together enough information to create a contact record,
483 * with us as CONTACT_IS_FOLLOWER
484 * Substitute our user's feed URL into $url template
485 * Send the subscriber home to subscribe
489 $url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url);
492 // END $network === NETWORK_OSTATUS
501 if(! function_exists('dfrn_request_content')) {
502 function dfrn_request_content(&$a) {
504 if(($a->argc != 2) || (! count($a->profile)))
508 // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
509 // to send us to the post section to record the introduction.
511 if(x($_GET,'dfrn_url')) {
514 info( t("Please login to confirm introduction.") . EOL );
516 /* setup the return URL to come back to this page if they use openid */
518 $stripped = str_replace('q=','',$a->query_string);
519 $_SESSION['return_url'] = trim($stripped,'/');
524 // Edge case, but can easily happen in the wild. This person is authenticated,
525 // but not as the person who needs to deal with this request.
527 if ($a->user['nickname'] != $a->argv[1]) {
528 notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
532 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
533 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
534 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
535 $tpl = get_markup_template("dfrn_req_confirm.tpl");
536 $o = replace_macros($tpl,array(
537 '$dfrn_url' => $dfrn_url,
538 '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
539 '$confirm_key' => $confirm_key,
540 '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
541 '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
542 '$submit' => t('Confirm'),
543 '$uid' => $_SESSION['uid'],
544 '$nickname' => $a->user['nickname'],
545 'dfrn_rawurl' => $_GET['dfrn_url']
550 elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
552 // we are the requestee and it is now safe to send our user their introduction,
553 // We could just unblock it, but first we have to jump through a few hoops to
554 // send an email, or even to find out if we need to send an email.
556 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
557 dbesc($_GET['confirm_key'])
562 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
563 WHERE `contact`.`id` = %d LIMIT 1",
564 intval($intro[0]['contact-id'])
567 $auto_confirm = false;
570 if($r[0]['page-flags'] != PAGE_NORMAL)
571 $auto_confirm = true;
573 if(! $auto_confirm) {
574 require_once('include/enotify.php');
576 'type' => NOTIFY_INTRO,
577 'notify_flags' => $r[0]['notify-flags'],
578 'language' => $r[0]['language'],
579 'to_name' => $r[0]['username'],
580 'to_email' => $r[0]['email'],
581 'uid' => $r[0]['uid'],
582 'link' => $a->get_baseurl() . '/notifications/intros',
583 'source_name' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
584 'source_link' => $r[0]['url'],
585 'source_photo' => $r[0]['photo'],
586 'verb' => ACTIVITY_REQ_FRIEND,
592 require_once('mod/dfrn_confirm.php');
594 'uid' => $r[0]['uid'],
595 'node' => $r[0]['nickname'],
596 'dfrn_id' => $r[0]['issued-id'],
597 'intro_id' => $intro[0]['id'],
598 'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0)
600 dfrn_confirm_post($a,$handsfree);
605 if(! $auto_confirm) {
607 // If we are auto_confirming, this record will have already been nuked
608 // in dfrn_confirm_post()
610 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
611 dbesc($_GET['confirm_key'])
617 return; // NOTREACHED
622 * Normal web request. Display our user's introduction form.
625 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
626 notice( t('Public access denied.') . EOL);
632 * Try to auto-fill the profile address
636 if(strlen($a->path)) {
637 $myaddr = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
640 $myaddr = $a->user['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 );
643 elseif(x($_GET,'addr')) {
644 $myaddr = hex2bin($_GET['addr']);
647 /* $_GET variables are already urldecoded */
648 $myaddr = ((x($_GET,'address')) ? $_GET['address'] : '');
651 $target_addr = $a->profile['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 );
656 * The auto_request form only has the profile address
657 * because nobody is going to read the comments and
658 * it doesn't matter if they know you or not.
662 if($a->profile['page-flags'] == PAGE_NORMAL)
663 $tpl = get_markup_template('dfrn_request.tpl');
665 $tpl = get_markup_template('auto_request.tpl');
667 # $page_desc = sprintf( t('Diaspora members: Please do not use this form. Instead, enter "%s" into your Diaspora search bar.'),
668 # $target_addr) . EOL . EOL;
670 $page_desc .= t("Please enter your 'Identity Address' from one of the following supported communications networks:");
672 // see if we are allowed to have NETWORK_MAIL2 contacts
674 $mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
675 if(get_config('system','dfrn_only'))
678 if(! $mail_disabled) {
679 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
680 intval($a->profile['uid'])
686 $emailnet = (($mail_disabled) ? '' : t("<strike>Connect as an email follower</strike> \x28Coming soon\x29"));
688 $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>.');
690 $o .= replace_macros($tpl,array(
691 '$header' => t('Friend/Connection Request'),
692 '$desc' => t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@identi.ca'),
693 '$pls_answer' => t('Please answer the following:'),
694 '$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']),
697 '$add_note' => t('Add a personal note:'),
698 '$page_desc' => $page_desc,
699 '$friendica' => t('Friendica'),
700 '$statusnet' => t('StatusNet/Federated Social Web'),
701 '$diaspora' => t('Diaspora'),
702 '$diasnote' => sprintf (t(' - please do not use this form. Instead, enter %s into your Diaspora search bar.'),$target_addr),
703 '$your_address' => t('Your Identity Address:'),
704 '$invite_desc' => $invite_desc,
705 '$emailnet' => $emailnet,
706 '$submit' => t('Submit Request'),
707 '$cancel' => t('Cancel'),
708 '$nickname' => $a->argv[1],
709 '$name' => $a->profile['name'],
715 return; // Somebody is fishing.