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",
304 $email_follow = (x($_POST,'email_follow') ? intval($_POST['email_follow']) : 0);
305 $real_name = (x($_POST,'realname') ? notags(trim($_POST['realname'])) : '');
307 $url = trim($_POST['dfrn_url']);
309 notice( t("Invalid locator") . EOL );
317 if(! strpos($url,'@')) {
318 notice( t('Invalid email address.') . EOL);
323 $name = ($realname) ? $realname : $addr;
324 $nick = substr($addr,0,strpos($addr,'@'));
325 $url = 'http://' . substr($addr,strpos($addr,'@') + 1);
326 $nurl = normalise_url($host);
327 $poll = 'email ' . random_string();
328 $notify = 'smtp ' . random_string();
331 $network = NETWORK_MAIL2;
332 $rel = CONTACT_IS_FOLLOWER;
334 $mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
335 if(get_config('system','dfrn_only'))
338 if(! $mail_disabled) {
340 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
344 notice( t('This account has not been configured for email. Request failed.') . EOL);
356 // Canonicalise email-style profile locator
358 $url = webfinger_dfrn($url,$hcard);
360 if(substr($url,0,5) === 'stat:') {
361 $network = NETWORK_OSTATUS;
362 $url = substr($url,5);
365 $network = NETWORK_DFRN;
369 logger('dfrn_request: url: ' . $url);
372 notice( t("Unable to resolve your name at the provided location.") . EOL);
377 if($network === NETWORK_DFRN) {
378 $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
384 if(strlen($ret[0]['issued-id'])) {
385 notice( t('You have already introduced yourself here.') . EOL );
388 elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) {
389 notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
393 $contact_record = $ret[0];
394 $parms = array('dfrn-request' => $ret[0]['request']);
398 $issued_id = random_string();
400 if(is_array($contact_record)) {
401 // There is a contact record but no issued-id, so this
402 // is a reciprocal introduction from a known contact
403 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
405 intval($contact_record['id'])
409 if(! validate_url($url)) {
410 notice( t('Invalid profile URL.') . EOL);
411 goaway($a->get_baseurl() . '/' . $a->cmd);
412 return; // NOTREACHED
415 if(! allowed_url($url)) {
416 notice( t('Disallowed profile URL.') . EOL);
417 goaway($a->get_baseurl() . '/' . $a->cmd);
418 return; // NOTREACHED
422 require_once('Scrape.php');
424 $parms = scrape_dfrn(($hcard) ? $hcard : $url);
426 if(! count($parms)) {
427 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
428 goaway($a->get_baseurl() . '/' . $a->cmd);
432 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
433 if(! x($parms,'photo'))
434 notice( t('Warning: profile location has no profile photo.') . EOL );
435 $invalid = validate_dfrn($parms);
437 notice( sprintf( tt("%d required parameter was not found at the given location",
438 "%d required parameters were not found at the given location",
439 $invalid), $invalid) . EOL );
446 $parms['url'] = $url;
447 $parms['issued-id'] = $issued_id;
451 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`,`name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
452 `request`, `confirm`, `notify`, `poll`, `poco`, `network` )
453 VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
455 dbesc(datetime_convert()),
457 dbesc(normalise_link($parms['url'])),
463 $parms['dfrn-request'],
464 $parms['dfrn-confirm'],
465 $parms['dfrn-notify'],
471 // find the contact record we just created
473 $r = q("SELECT `id` FROM `contact`
474 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
480 $contact_record = $r[0];
485 notice( t('Failed to update contact record.') . EOL );
489 $hash = random_string() . (string) time(); // Generate a confirm_key
491 if(is_array($contact_record)) {
492 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
493 VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
495 intval($contact_record['id']),
496 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
497 dbesc(notags(trim($_POST['dfrn-request-message']))),
499 dbesc(datetime_convert())
503 // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
506 info( t('Your introduction has been sent.') . EOL );
508 // "Homecoming" - send the requestor back to their site to record the introduction.
510 $dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
511 $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
513 goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
514 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
515 . '&confirm_key=' . $hash
516 . (($aes_allow) ? "&aes_allow=1" : "")
519 // END $network === NETWORK_DFRN
521 elseif($network === NETWORK_OSTATUS) {
526 * Check contact existence
527 * Try and scrape together enough information to create a contact record,
528 * with us as CONTACT_IS_FOLLOWER
529 * Substitute our user's feed URL into $url template
530 * Send the subscriber home to subscribe
534 $url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url);
537 // END $network === NETWORK_OSTATUS
546 if(! function_exists('dfrn_request_content')) {
547 function dfrn_request_content(&$a) {
549 if(($a->argc != 2) || (! count($a->profile)))
553 // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
554 // to send us to the post section to record the introduction.
556 if(x($_GET,'dfrn_url')) {
559 info( t("Please login to confirm introduction.") . EOL );
561 /* setup the return URL to come back to this page if they use openid */
563 $stripped = str_replace('q=','',$a->query_string);
564 $_SESSION['return_url'] = trim($stripped,'/');
569 // Edge case, but can easily happen in the wild. This person is authenticated,
570 // but not as the person who needs to deal with this request.
572 if ($a->user['nickname'] != $a->argv[1]) {
573 notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
577 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
578 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
579 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
580 $tpl = get_markup_template("dfrn_req_confirm.tpl");
581 $o = replace_macros($tpl,array(
582 '$dfrn_url' => $dfrn_url,
583 '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
584 '$confirm_key' => $confirm_key,
585 '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
586 '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
587 '$submit' => t('Confirm'),
588 '$uid' => $_SESSION['uid'],
589 '$nickname' => $a->user['nickname'],
590 'dfrn_rawurl' => $_GET['dfrn_url']
595 elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
597 // we are the requestee and it is now safe to send our user their introduction,
598 // We could just unblock it, but first we have to jump through a few hoops to
599 // send an email, or even to find out if we need to send an email.
601 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
602 dbesc($_GET['confirm_key'])
607 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
608 WHERE `contact`.`id` = %d LIMIT 1",
609 intval($intro[0]['contact-id'])
612 $auto_confirm = false;
615 if($r[0]['page-flags'] != PAGE_NORMAL)
616 $auto_confirm = true;
618 if(! $auto_confirm) {
619 require_once('include/enotify.php');
621 'type' => NOTIFY_INTRO,
622 'notify_flags' => $r[0]['notify-flags'],
623 'language' => $r[0]['language'],
624 'to_name' => $r[0]['username'],
625 'to_email' => $r[0]['email'],
626 'uid' => $r[0]['uid'],
627 'link' => $a->get_baseurl() . '/notifications/intros',
628 'source_name' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
629 'source_link' => $r[0]['url'],
630 'source_photo' => $r[0]['photo'],
631 'verb' => ACTIVITY_REQ_FRIEND,
637 require_once('mod/dfrn_confirm.php');
639 'uid' => $r[0]['uid'],
640 'node' => $r[0]['nickname'],
641 'dfrn_id' => $r[0]['issued-id'],
642 'intro_id' => $intro[0]['id'],
643 'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0)
645 dfrn_confirm_post($a,$handsfree);
650 if(! $auto_confirm) {
652 // If we are auto_confirming, this record will have already been nuked
653 // in dfrn_confirm_post()
655 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
656 dbesc($_GET['confirm_key'])
662 return; // NOTREACHED
667 * Normal web request. Display our user's introduction form.
670 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
671 notice( t('Public access denied.') . EOL);
677 * Try to auto-fill the profile address
681 if(strlen($a->path)) {
682 $myaddr = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
685 $myaddr = $a->user['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 );
688 elseif(x($_GET,'addr')) {
689 $myaddr = hex2bin($_GET['addr']);
692 /* $_GET variables are already urldecoded */
693 $myaddr = ((x($_GET,'address')) ? $_GET['address'] : '');
696 $target_addr = $a->profile['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 );
701 * The auto_request form only has the profile address
702 * because nobody is going to read the comments and
703 * it doesn't matter if they know you or not.
707 if($a->profile['page-flags'] == PAGE_NORMAL)
708 $tpl = get_markup_template('dfrn_request.tpl');
710 $tpl = get_markup_template('auto_request.tpl');
712 # $page_desc = sprintf( t('Diaspora members: Please do not use this form. Instead, enter "%s" into your Diaspora search bar.'),
713 # $target_addr) . EOL . EOL;
715 $page_desc .= t("Please enter your 'Identity Address' from one of the following supported communications networks:");
717 // see if we are allowed to have NETWORK_MAIL2 contacts
719 $mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
720 if(get_config('system','dfrn_only'))
723 if(! $mail_disabled) {
724 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
725 intval($a->profile['uid'])
731 $emailnet = (($mail_disabled) ? '' : t("<strike>Connect as an email follower</strike> \x28Coming soon\x29"));
733 $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>.');
735 $o .= replace_macros($tpl,array(
736 '$header' => t('Friend/Connection Request'),
737 '$desc' => t('Examples: jojo@demo.friendica.com, http://demo.friendica.com/profile/jojo, testuser@identi.ca'),
738 '$pls_answer' => t('Please answer the following:'),
739 '$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']),
742 '$add_note' => t('Add a personal note:'),
743 '$page_desc' => $page_desc,
744 '$friendica' => t('Friendica'),
745 '$statusnet' => t('StatusNet/Federated Social Web'),
746 '$diaspora' => t('Diaspora'),
747 '$diasnote' => sprintf (t(' - please do not use this form. Instead, enter %s into your Diaspora search bar.'),$target_addr),
748 '$your_address' => t('Your Identity Address:'),
749 '$invite_desc' => $invite_desc,
750 '$emailnet' => $emailnet,
751 '$submit' => t('Submit Request'),
752 '$cancel' => t('Cancel'),
753 '$nickname' => $a->argv[1],
754 '$name' => $a->profile['name'],
760 return; // Somebody is fishing.