]> git.mxchange.org Git - friendica.git/blob - mod/dfrn_request.php
"profile locator/address" is now called "Identity Address" to reduce confusion
[friendica.git] / 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($_POST['cancel']) {
47                 goaway($a->get_baseurl());
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
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                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
81                                         intval(local_user()),
82                                         dbesc($dfrn_url)
83                                 );
84         
85                                 if(count($r)) {
86                                         if(strlen($r[0]['dfrn-id'])) {
87
88                                                 /**
89                                                  * We don't need to be here. It has already happened.
90                                                  */
91
92                                                 notice( t("This introduction has already been accepted.") . EOL );
93                                                 return;
94                                         }
95                                         else
96                                                 $contact_record = $r[0];
97                                 }
98         
99                                 if(is_array($contact_record)) {
100                                         $r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
101                                                 intval($aes_allow),
102                                                 intval($contact_record['id'])
103                                         );
104                                 }
105                                 else {
106         
107                                         /**
108                                          * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
109                                          */
110
111                                         require_once('Scrape.php');
112         
113                                         $parms = scrape_dfrn($dfrn_url);
114         
115                                         if(! count($parms)) {
116                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
117                                                 return;
118                                         }
119                                         else {
120                                                 if(! x($parms,'fn'))
121                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
122                                                 if(! x($parms,'photo'))
123                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
124                                                 $invalid = validate_dfrn($parms);               
125                                                 if($invalid) {
126                                                         notice( sprintf( tt("%d required parameter was not found at the given location",
127                                                                                                 "%d required parameters were not found at the given location",
128                                                                                                 $invalid), $invalid) . EOL );
129                                                         return;
130                                                 }
131                                         }
132
133                                         $dfrn_request = $parms['dfrn-request'];
134
135                     /********* Escape the entire array ********/
136
137                                         dbesc_array($parms);
138
139                                         /******************************************/
140
141                                         /**
142                                          * Create a contact record on our site for the other person
143                                          */
144
145                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `nick`, `photo`, `site-pubkey`,
146                                                 `request`, `confirm`, `notify`, `poll`, `aes_allow`) 
147                                                 VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d)",
148                                                 intval(local_user()),
149                                                 datetime_convert(),
150                                                 dbesc($dfrn_url),
151                                                 $parms['fn'],
152                                                 $parms['nick'],
153                                                 $parms['photo'],
154                                                 $parms['key'],
155                                                 $parms['dfrn-request'],
156                                                 $parms['dfrn-confirm'],
157                                                 $parms['dfrn-notify'],
158                                                 $parms['dfrn-poll'],
159                                                 intval($aes_allow)
160                                         );
161                                 }
162
163                                 if($r) {
164                                         notice( t("Introduction complete.") . EOL);
165                                 }
166
167                                 /**
168                                  * Allow the blocked remote notification to complete
169                                  */
170
171                                 if(is_array($contact_record))
172                                         $dfrn_request = $contact_record['request'];
173
174                                 if(strlen($dfrn_request) && strlen($confirm_key))
175                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
176                                 
177                                 // (ignore reply, nothing we can do it failed)
178
179                                 goaway($dfrn_url);
180                                 return; // NOTREACHED
181
182                         }
183
184                 }
185
186                 // invalid/bogus request
187
188                 notice( t('Unrecoverable protocol error.') . EOL );
189                 goaway($a->get_baseurl());
190                 return; // NOTREACHED
191         }
192
193         /**
194          * Otherwise:
195          * 
196          * Scenario 1:
197          * We are the requestee. A person from a remote cell has made an introduction 
198          * on our profile web page and clicked submit. We will use their DFRN-URL to 
199          * figure out how to contact their cell.  
200          *
201          * Scrape the originating DFRN-URL for everything we need. Create a contact record
202          * and an introduction to show our user next time he/she logs in.
203          * Finally redirect back to the requestor so that their site can record the request.
204          * If our user (the requestee) later confirms this request, a record of it will need 
205          * to exist on the requestor's cell in order for the confirmation process to complete.. 
206          *
207          * It's possible that neither the requestor or the requestee are logged in at the moment,
208          * and the requestor does not yet have any credentials to the requestee profile.
209          *
210          * Who is the requestee? We've already loaded their profile which means their nickname should be
211          * in $a->argv[1] and we should have their complete info in $a->profile.
212          *
213          */
214
215         if(! (is_array($a->profile) && count($a->profile))) {
216                 notice( t('Profile unavailable.') . EOL);
217                 return;
218         }
219
220         $nickname       = $a->profile['nickname'];
221         $notify_flags   = $a->profile['notify-flags'];
222         $uid            = $a->profile['uid'];
223         $maxreq         = intval($a->profile['maxreq']);
224         $contact_record = null;
225         $failed         = false;
226         $parms          = null;
227
228
229         if( x($_POST,'dfrn_url')) {
230
231                 /**
232                  * Block friend request spam
233                  */
234
235                 if($maxreq) {
236                         $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
237                                 dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
238                                 intval($uid)
239                         );
240                         if(count($r) > $maxreq) {
241                                 notice( sprintf( t('%s has received too many connection requests today.'),  $a->profile['name']) . EOL);
242                                 notice( t('Spam protection measures have been invoked.') . EOL);
243                                 notice( t('Friends are advised to please try again in 24 hours.') . EOL);
244                                 return;
245                         } 
246                 }
247
248                 /**
249                  *
250                  * Cleanup old introductions that remain blocked. 
251                  * Also remove the contact record, but only if there is no existing relationship
252                  *
253                  */
254
255                 $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel` 
256                         FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
257                         WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0 AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ");
258                 if(count($r)) {
259                         foreach($r as $rr) {
260                                 if(! $rr['rel']) {
261                                         q("DELETE FROM `contact` WHERE `id` = %d LIMIT 1",
262                                                 intval($rr['cid'])
263                                         );
264                                 }
265                                 q("DELETE FROM `intro` WHERE `id` = %d LIMIT 1",
266                                         intval($rr['iid'])
267                                 );
268                         }
269                 }
270
271                 $url = trim($_POST['dfrn_url']);
272                 if(! strlen($url)) {
273                         notice( t("Invalid locator") . EOL );
274                         return;
275                 }
276
277                 // Canonicalise email-style profile locator
278
279                 $url = webfinger_dfrn($url);
280
281                 if(substr($url,0,5) === 'stat:') {
282                         $network = 'stat';
283                         $url = substr($url,5);
284                 }
285                 else {
286                         $network = 'dfrn';
287                 }
288
289                 logger('dfrn_request: url: ' . $url);
290
291                 if(! strlen($url)) {
292                         notice( t("Unable to resolve your name at the provided location.") . EOL);                      
293                         return;
294                 }
295
296
297                 if($network === 'dfrn') {
298                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1", 
299                                 intval($uid),
300                                 dbesc($url)
301                         );
302
303                         if(count($ret)) {
304                                 if(strlen($ret[0]['issued-id'])) {
305                                         notice( t('You have already introduced yourself here.') . EOL );
306                                         return;
307                                 }
308                                 elseif($ret[0]['rel'] == REL_BUD) {
309                                         notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
310                                         return;
311                                 }
312                                 else {
313                                         $contact_record = $ret[0];
314                                         $parms = array('dfrn-request' => $ret[0]['request']);
315                                 }
316                         }
317
318                         $issued_id = random_string();
319
320                         if(is_array($contact_record)) {
321                                 // There is a contact record but no issued-id, so this
322                                 // is a reciprocal introduction from a known contact
323                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
324                                         dbesc($issued_id),
325                                         intval($contact_record['id'])
326                                 );
327                         }
328                         else {
329                                 if(! validate_url($url)) {
330                                         notice( t('Invalid profile URL.') . EOL);
331                                         goaway($a->get_baseurl() . '/' . $a->cmd);
332                                         return; // NOTREACHED
333                                 }
334
335                                 if(! allowed_url($url)) {
336                                         notice( t('Disallowed profile URL.') . EOL);
337                                         goaway($a->get_baseurl() . '/' . $a->cmd);
338                                         return; // NOTREACHED
339                                 }
340                         
341
342                                 require_once('Scrape.php');
343
344                                 $parms = scrape_dfrn($url);
345
346                                 if(! count($parms)) {
347                                         notice( t('Profile location is not valid or does not contain profile information.') . EOL );
348                                         goaway($a->get_baseurl() . '/' . $a->cmd);
349                                 }
350                                 else {
351                                         if(! x($parms,'fn'))
352                                                 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
353                                         if(! x($parms,'photo'))
354                                                 notice( t('Warning: profile location has no profile photo.') . EOL );
355                                         $invalid = validate_dfrn($parms);               
356                                         if($invalid) {
357                                                 notice( sprintf( tt("%d required parameter was not found at the given location",
358                                                                                         "%d required parameters were not found at the given location",
359                                                                                         $invalid), $invalid) . EOL );
360         
361                                                 return;
362                                         }
363                                 }
364
365
366                                 $parms['url'] = $url;
367                                 $parms['issued-id'] = $issued_id;
368
369
370                                 dbesc_array($parms);
371                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
372                                         `request`, `confirm`, `notify`, `poll` )
373                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
374                                         intval($uid),
375                                         datetime_convert(),
376                                         $parms['url'],
377                                         $parms['fn'],
378                                         $parms['nick'],
379                                         $parms['issued-id'],
380                                         $parms['photo'],
381                                         $parms['key'],
382                                         $parms['dfrn-request'],
383                                         $parms['dfrn-confirm'],
384                                         $parms['dfrn-notify'],
385                                         $parms['dfrn-poll']
386                                 );
387
388                                 // find the contact record we just created
389                                 if($r) {        
390                                         $r = q("SELECT `id` FROM `contact` 
391                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
392                                                 intval($uid),
393                                                 $parms['url'],
394                                                 $parms['issued-id']
395                                         );
396                                         if(count($r)) 
397                                                 $contact_record = $r[0];
398                                 }
399         
400                         }
401                         if($r === false) {
402                                 notice( t('Failed to update contact record.') . EOL );
403                                 return;
404                         }
405
406                         $hash = random_string() . (string) time();   // Generate a confirm_key
407         
408                         if(is_array($contact_record)) {
409                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
410                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
411                                         intval($uid),
412                                         intval($contact_record['id']),
413                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
414                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
415                                         dbesc($hash),
416                                         dbesc(datetime_convert())
417                                 );
418                         }
419         
420                         // This notice will only be seen by the requestor if the requestor and requestee are on the same server.
421
422                         if(! $failed) 
423                                 notice( t('Your introduction has been sent.') . EOL );
424
425                         // "Homecoming" - send the requestor back to their site to record the introduction.
426
427                         $dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
428                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
429
430                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" 
431                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION 
432                                 . '&confirm_key='  . $hash 
433                                 . (($aes_allow) ? "&aes_allow=1" : "")
434                         );
435                         // NOTREACHED
436                         // END $network === 'dfrn'
437                 }
438                 elseif($network === 'stat') {
439                         
440                         /**
441                          *
442                          * OStatus network
443                          * Check contact existence
444                          * Try and scrape together enough information to create a contact record, with us as REL_VIP
445                          * Substitute our user's feed URL into $url template
446                          * Send the subscriber home to subscribe
447                          *
448                          */
449
450                         $url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url);
451                         goaway($url);
452                         // NOTREACHED
453                         // END $network === 'stat'
454                 }
455
456         }       return;
457 }}
458
459
460
461
462 if(! function_exists('dfrn_request_content')) {
463 function dfrn_request_content(&$a) {
464
465         
466
467         if(($a->argc != 2) || (! count($a->profile)))
468                 return "";
469
470
471         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
472         // to send us to the post section to record the introduction.
473
474         if(x($_GET,'dfrn_url')) {
475
476                 if(! local_user()) {
477                         notice( t("Please login to confirm introduction.") . EOL );
478
479                         /* setup the return URL to come back to this page if they use openid */
480
481                         $stripped = str_replace('q=','',$a->query_string);
482                         $_SESSION['return_url'] = trim($stripped,'/');
483
484                         return login();
485                 }
486
487                 // Edge case, but can easily happen in the wild. This person is authenticated, 
488                 // but not as the person who needs to deal with this request.
489
490                 if ($a->user['nickname'] != $a->argv[1]) {
491                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
492                         return login();
493                 }
494
495                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
496                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
497                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
498                 $o .= load_view_file("view/dfrn_req_confirm.tpl");
499                 $o  = replace_macros($o,array(
500                         '$dfrn_url' => $dfrn_url,
501                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
502                         '$confirm_key' => $confirm_key,
503                         '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
504                         '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
505                         '$submit' => t('Confirm'),
506                         '$uid' => $_SESSION['uid'],
507                         '$nickname' => $a->user['nickname'],
508                         'dfrn_rawurl' => $_GET['dfrn_url']
509                         ));
510                 return $o;
511
512         }
513         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) { 
514
515                 // we are the requestee and it is now safe to send our user their introduction,
516                 // We could just unblock it, but first we have to jump through a few hoops to 
517                 // send an email, or even to find out if we need to send an email. 
518
519                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
520                         dbesc($_GET['confirm_key'])
521                 );
522
523                 if(count($intro)) {
524
525                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
526                                 WHERE `contact`.`id` = %d LIMIT 1",
527                                 intval($intro[0]['contact-id'])
528                         );
529
530                         $auto_confirm = false;
531
532                         if(count($r)) {
533                                 if($r[0]['page-flags'] != PAGE_NORMAL)
534                                         $auto_confirm = true;                           
535                                 if(($r[0]['notify-flags'] & NOTIFY_INTRO) && (! $auto_confirm)) {
536                                         $email_tpl = load_view_file('view/request_notify_eml.tpl');
537                                         $email = replace_macros($email_tpl, array(
538                                                 '$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
539                                                 '$url' => stripslashes($r[0]['url']),
540                                                 '$myname' => $r[0]['username'],
541                                                 '$siteurl' => $a->get_baseurl(),
542                                                 '$sitename' => $a->config['sitename']
543                                         ));
544                                         $res = mail($r[0]['email'], 
545                                             t("Introduction received at ") . $a->config['sitename'],
546                                                 $email,
547                                                 'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
548                                                 . 'Content-type: text/plain; charset=UTF-8' . "\n"
549                                                 . 'Content-transfer-encoding: 8bit' );
550
551                                         // This is a redundant notification - no point throwing errors if it fails.
552                                 }
553                                 if($auto_confirm) {
554                                         require_once('mod/dfrn_confirm.php');
555                                         $handsfree = array(
556                                                 'uid' => $r[0]['uid'],
557                                                 'node' => $r[0]['nickname'],
558                                                 'dfrn_id' => $r[0]['issued-id'],
559                                                 'intro_id' => $intro[0]['id'],
560                                                 'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0)
561                                         );
562                                         dfrn_confirm_post($a,$handsfree);
563                                 }
564
565                         }
566
567                         if(! $auto_confirm) {
568
569                                 // If we are auto_confirming, this record will have already been nuked
570                                 // in dfrn_confirm_post()
571
572                                 $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
573                                         dbesc($_GET['confirm_key'])
574                                 );
575                         }
576                 }
577                 killme();
578                 return; // NOTREACHED
579         }
580         else {
581
582                 /**
583                  * Normal web request. Display our user's introduction form.
584                  */
585  
586                 /**
587                  * Try to auto-fill the profile address
588                  */
589
590                 if(local_user()) {
591                         if(strlen($a->path)) {
592                                 $myaddr = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
593                         }
594                         else {
595                                 $myaddr = $a->user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3 );
596                         }
597                 }
598                 elseif(x($_GET,'addr')) {
599                         $myaddr = hex2bin($_GET['addr']);
600                 }
601                 else {
602                         /* $_GET variables are already urldecoded */ 
603                         $myaddr = ((x($_GET,'address')) ? $_GET['address'] : '');
604                 }
605
606                 /**
607                  *
608                  * The auto_request form only has the profile address
609                  * because nobody is going to read the comments and 
610                  * it doesn't matter if they know you or not.
611                  *
612                  */
613
614                 if($a->profile['page-flags'] == PAGE_NORMAL)
615                         $tpl = load_view_file('view/dfrn_request.tpl');
616                 else
617                         $tpl = load_view_file('view/auto_request.tpl');
618
619                 $o .= replace_macros($tpl,array(
620                         '$header' => t('Friend/Connection Request'),
621                         '$desc' => t('Examples: jojo@demo.friendika.com, http://demo.friendika.com/profile/jojo, testuser@identi.ca'),
622                         '$pls_answer' => t('Please answer the following:'),
623                         '$does_know' => t('Does $name know you?'),
624                         '$yes' => t('Yes'),
625                         '$no' => t('No'),
626                         '$add_note' => t('Add a personal note:'),
627                         '$page_desc' => t("Please enter your 'Identity Address' from one of the following supported social networks:"),
628                         '$friendika' => t('Friendika'),
629                         '$statusnet' => t('StatusNet/Federated Social Web'),
630                         '$private_net' => t("Private \x28secure\x29 network"),
631                         '$public_net' => t("Public \x28insecure\x29 network"),
632                         '$your_address' => t('Your Identity Address:'),
633                         '$submit' => t('Submit Request'),
634                         '$cancel' => t('Cancel'),
635                         '$nickname' => $a->argv[1],
636                         '$name' => $a->profile['name'],
637                         '$myaddr' => $myaddr
638                 ));
639                 return $o;
640         }
641
642         return; // Somebody is fishing.
643 }}