3 * Laconica - a distributed open-source microblogging tool
4 * Copyright (C) 2008, Controlez-Vous, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 /* XXX: break up into separate modules (HTTP, HTML, user, files) */
24 function common_server_error($msg, $code=500) {
25 static $status = array(500 => 'Internal Server Error',
26 501 => 'Not Implemented',
28 503 => 'Service Unavailable',
29 504 => 'Gateway Timeout',
30 505 => 'HTTP Version Not Supported');
32 if (!array_key_exists($code, $status)) {
36 $status_string = $status[$code];
38 header('HTTP/1.1 '.$code.' '.$status_string);
39 header('Content-type: text/plain');
47 function common_user_error($msg, $code=400) {
48 static $status = array(400 => 'Bad Request',
49 401 => 'Unauthorized',
50 402 => 'Payment Required',
53 405 => 'Method Not Allowed',
54 406 => 'Not Acceptable',
55 407 => 'Proxy Authentication Required',
56 408 => 'Request Timeout',
59 411 => 'Length Required',
60 412 => 'Precondition Failed',
61 413 => 'Request Entity Too Large',
62 414 => 'Request-URI Too Long',
63 415 => 'Unsupported Media Type',
64 416 => 'Requested Range Not Satisfiable',
65 417 => 'Expectation Failed');
67 if (!array_key_exists($code, $status)) {
71 $status_string = $status[$code];
73 header('HTTP/1.1 '.$code.' '.$status_string);
75 common_show_header('Error');
76 common_element('div', array('class' => 'error'), $msg);
82 # Start an HTML element
83 function common_element_start($tag, $attrs=NULL) {
85 $xw->startElement($tag);
86 if (is_array($attrs)) {
87 foreach ($attrs as $name => $value) {
88 $xw->writeAttribute($name, $value);
90 } else if (is_string($attrs)) {
91 $xw->writeAttribute('class', $attrs);
95 function common_element_end($tag) {
100 function common_element($tag, $attrs=NULL, $content=NULL) {
101 common_element_start($tag, $attrs);
106 common_element_end($tag);
109 function common_start_xml($doc=NULL, $public=NULL, $system=NULL) {
111 $xw = new XMLWriter();
112 $xw->openURI('php://output');
113 $xw->setIndent(true);
114 $xw->startDocument('1.0', 'UTF-8');
116 $xw->writeDTD($doc, $public, $system);
120 function common_end_xml() {
126 define('PAGE_TYPE_PREFS', 'application/xhtml+xml,text/html;q=0.7,application/xml;q=0.3,text/xml;q=0.2');
128 function common_show_header($pagetitle, $callable=NULL, $data=NULL, $headercall=NULL) {
131 $httpaccept = isset($_SERVER['HTTP_ACCEPT']) ? $_SERVER['HTTP_ACCEPT'] : NULL;
133 # XXX: allow content negotiation for RDF, RSS, or XRDS
135 $type = common_negotiate_type(common_accept_to_prefs($httpaccept),
136 common_accept_to_prefs(PAGE_TYPE_PREFS));
139 common_client_error(_t('This page is not available in a media type you accept'), 406);
143 header('Content-Type: '.$type);
145 common_start_xml('html',
146 '-//W3C//DTD XHTML 1.0 Strict//EN',
147 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
149 # FIXME: correct language for interface
151 common_element_start('html', array('xmlns' => 'http://www.w3.org/1999/xhtml',
155 common_element_start('head');
156 common_element('title', NULL,
157 $pagetitle . " - " . $config['site']['name']);
158 common_element('link', array('rel' => 'stylesheet',
159 'type' => 'text/css',
160 'href' => theme_path('display.css'),
161 'media' => 'screen, projection, tv'));
162 foreach (array(6,7) as $ver) {
163 if (file_exists(theme_file('ie'.$ver.'.css'))) {
164 # Yes, IE people should be put in jail.
165 $xw->writeComment('[if lte IE '.$ver.']><link rel="stylesheet" type="text/css" '.
166 'href="'.theme_path('ie'.$ver.'.css').' /><![endif]');
170 common_element('script', array('type' => 'text/javascript',
171 'src' => common_path('js/jquery.min.js')),
176 call_user_func($callable, $data);
178 call_user_func($callable);
181 common_element_end('head');
182 common_element_start('body');
183 common_element_start('div', array('id' => 'wrap'));
184 common_element_start('div', array('id' => 'header'));
186 if ((is_string($config['site']['logo']) && (strlen($config['site']['logo']) > 0))
187 || file_exists(theme_file('logo.png')))
189 common_element_start('a', array('href' => common_local_url('public')));
190 common_element('img', array('src' => ($config['site']['logo']) ?
191 ($config['site']['logo']) : theme_path('logo.png'),
192 'alt' => $config['site']['name'],
194 common_element_end('a');
196 common_element_start('p', array('id' => 'branding'));
197 common_element('a', array('href' => common_local_url('public')),
198 $config['site']['name']);
199 common_element_end('p');
202 common_element('h1', 'pagetitle', $pagetitle);
206 call_user_func($headercall, $data);
208 call_user_func($headercall);
211 common_element_end('div');
212 common_element_start('div', array('id' => 'content'));
215 function common_show_footer() {
217 common_element_end('div'); # content div
219 common_element_start('div', array('id' => 'footer'));
220 common_element_start('p', 'laconica');
221 common_text(_t('This site is running the '));
222 common_element('a', array('class' => 'software',
223 href => 'http://laconi.ca/'),
225 common_text(_t('microblogging tool, version ' . LACONICA_VERSION . ', available under the '));
226 common_element('a', array(href => 'http://www.fsf.org/licensing/licenses/agpl-3.0.html'),
227 'GNU Affero General Public License');
228 common_text(_t('.'));
229 common_element_end('p');
230 common_element('img', array('id' => 'cc',
231 'src' => $config['license']['image'],
232 'alt' => $config['license']['title']));
233 common_element_start('p');
234 common_text(_t('Unless otherwise specified, contents of this site are copyright by the contributors and available under the '));
235 common_element('a', array('class' => 'license',
237 href => $config['license']['url']),
238 $config['license']['title']);
239 common_text(_t('. Contributors should be attributed by full name or nickname.'));
240 common_element_end('p');
241 common_element_end('div');
242 common_element_end('div');
243 common_element_end('body');
244 common_element_end('html');
248 function common_text($txt) {
253 function common_raw($xml) {
258 function common_nav_menu() {
259 $user = common_current_user();
260 common_element_start('ul', array('id' => 'nav'));
262 common_menu_item(common_local_url('all', array('nickname' => $user->nickname)),
265 common_menu_item(common_local_url('public'), _t('Public'));
266 common_menu_item(common_local_url('doc', array('title' => 'help')),
269 common_menu_item(common_local_url('profilesettings'),
271 common_menu_item(common_local_url('logout'),
274 common_menu_item(common_local_url('login'), _t('Login'));
275 common_menu_item(common_local_url('register'), _t('Register'));
276 common_menu_item(common_local_url('openidlogin'), _t('OpenID'));
278 common_element_end('ul');
281 function common_foot_menu() {
282 common_element_start('ul', array('id' => 'nav_sub'));
283 common_menu_item(common_local_url('doc', array('title' => 'about')),
285 common_menu_item(common_local_url('doc', array('title' => 'privacy')),
287 common_menu_item(common_local_url('doc', array('title' => 'source')),
289 common_element_end('ul');
292 function common_menu_item($url, $text, $title=NULL, $is_selected=false) {
295 $lattrs['class'] = 'current';
297 common_element_start('li', $lattrs);
298 $attrs['href'] = $url;
300 $attrs['title'] = $title;
302 common_element('a', $attrs, $text);
303 common_element_end('li');
306 function common_input($id, $label, $value=NULL,$instructions=NULL) {
307 common_element_start('p');
308 common_element('label', array('for' => $id), $label);
309 $attrs = array('name' => $id,
313 $attrs['value'] = htmlspecialchars($value);
315 common_element('input', $attrs);
317 common_element('span', 'input_instructions', $instructions);
319 common_element_end('p');
322 function common_checkbox($id, $label, $checked=false, $instructions=NULL, $value='true')
324 common_element_start('p');
325 $attrs = array('name' => $id,
326 'type' => 'checkbox',
329 $attrs['value'] = htmlspecialchars($value);
332 $attrs['checked'] = 'checked';
334 common_element('input', $attrs);
337 common_element('span', 'checkbox_label', $label);
340 common_element('span', 'input_instructions', $instructions);
342 common_element_end('p');
345 function common_hidden($id, $value) {
346 common_element('input', array('name' => $id,
352 function common_password($id, $label, $instructions=NULL) {
353 common_element_start('p');
354 common_element('label', array('for' => $id), $label);
355 $attrs = array('name' => $id,
356 'type' => 'password',
358 common_element('input', $attrs);
360 common_element('span', 'input_instructions', $instructions);
362 common_element_end('p');
365 function common_submit($id, $label) {
367 common_element_start('p');
368 common_element('input', array('type' => 'submit',
373 common_element_end('p');
376 function common_textarea($id, $label, $content=NULL, $instructions=NULL) {
377 common_element_start('p');
378 common_element('label', array('for' => $id), $label);
379 common_element('textarea', array('rows' => 3,
383 ($content) ? $content : ' ');
385 common_element('span', 'input_instructions', $instructions);
387 common_element_end('p');
390 # salted, hashed passwords are stored in the DB
392 function common_munge_password($password, $id) {
393 return md5($password . $id);
396 # check if a username exists and has matching password
397 function common_check_user($nickname, $password) {
398 $user = User::staticGet('nickname', $nickname);
399 if (is_null($user)) {
402 return (0 == strcmp(common_munge_password($password, $user->id),
407 # is the current user logged in?
408 function common_logged_in() {
409 return (!is_null(common_current_user()));
412 function common_have_session() {
413 return (0 != strcmp(session_id(), ''));
416 function common_ensure_session() {
417 if (!common_have_session()) {
422 function common_set_user($nickname) {
423 if (is_null($nickname) && common_have_session()) {
424 unset($_SESSION['userid']);
427 $user = User::staticGet('nickname', $nickname);
429 common_ensure_session();
430 $_SESSION['userid'] = $user->id;
439 function common_set_cookie($key, $value, $expiration=0) {
440 $path = common_config('site', 'path');
441 $server = common_config('site', 'server');
443 if ($path && ($path != '/')) {
444 $cookiepath = '/' . $path . '/';
448 return setcookie($key,
455 define('REMEMBERME', 'rememberme');
456 define('REMEMBERME_EXPIRY', 30 * 24 * 60 * 60);
458 function common_rememberme() {
459 $user = common_current_user();
463 $rm = new Remember_me();
464 $rm->code = common_good_rand(16);
465 $rm->user_id = $user->id;
466 $result = $rm->insert();
468 common_log_db_error($rm, 'INSERT', __FILE__);
471 common_set_cookie(REMEMBERME,
472 implode(':', array($rm->user_id, $rm->code)),
473 time() + REMEMBERME_EXPIRY);
476 function common_remembered_user() {
479 $packed = $_COOKIE[REMEMBERME];
481 list($id, $code) = explode(':', $packed);
483 $rm = Remember_me::staticGet($code);
484 if ($rm && ($rm->user_id == $id)) {
485 $user = User::staticGet($rm->user_id);
488 $result = $rm->delete();
490 common_log_db_error($rm, 'DELETE', __FILE__);
493 common_set_user($user->nickname);
494 common_real_login(false);
495 # We issue a new cookie, so they can log in
496 # automatically again after this session
506 # must be called with a valid user!
508 function common_forgetme() {
509 common_set_cookie(REMEMBERME, '', 0);
512 # who is the current user?
513 function common_current_user() {
514 if ($_REQUEST[session_name()]) {
515 common_ensure_session();
516 $id = $_SESSION['userid'];
518 # note: this should cache
519 $user = User::staticGet($id);
523 # that didn't work; try to remember
524 $user = common_remembered_user();
528 # Logins that are 'remembered' aren't 'real' -- they're subject to
529 # cookie-stealing. So, we don't let them do certain things. New reg,
530 # OpenID, and password logins _are_ real.
532 function common_real_login($real=true) {
533 common_ensure_session();
534 $_SESSION['real_login'] = $real;
537 function common_is_real_login() {
538 return common_logged_in() && $_SESSION['real_login'];
541 # get canonical version of nickname for comparison
542 function common_canonical_nickname($nickname) {
543 # XXX: UTF-8 canonicalization (like combining chars)
544 return strtolower($nickname);
547 # get canonical version of email for comparison
548 function common_canonical_email($email) {
549 # XXX: canonicalize UTF-8
550 # XXX: lcase the domain part
554 define('URL_REGEX', '^|[ \t\r\n])((ftp|http|https|gopher|mailto|news|nntp|telnet|wais|file|prospero|aim|webcal):(([A-Za-z0-9$_.+!*(),;/?:@&~=-])|%[A-Fa-f0-9]{2}){2,}(#([a-zA-Z0-9][a-zA-Z0-9$_.+!*(),;/?:@&~=%-]*))?([A-Za-z0-9$_+!*();/?:~-]))');
556 function common_render_content($text, $notice) {
557 $r = htmlspecialchars($text);
558 $id = $notice->profile_id;
559 $r = preg_replace('@https?://\S+@', '<a href="\0" class="extlink">\0</a>', $r);
560 $r = preg_replace('/(^|\s+)@([a-z0-9]{1,64})/e', "'\\1@'.common_at_link($id, '\\2')", $r);
566 function common_at_link($sender_id, $nickname) {
567 # Try to find profiles this profile is subscribed to that have this nickname
568 $recipient = new Profile();
569 # XXX: chokety and bad
570 $recipient->whereAdd('EXISTS (SELECT subscribed from subscription where subscriber = '.$sender_id.' and subscribed = id)', 'AND');
571 $recipient->whereAdd('nickname = "' . trim($nickname) . '"', 'AND');
572 if ($recipient->find(TRUE)) {
573 return '<a href="'.htmlspecialchars($recipient->profileurl).'" class="atlink tolistenee">'.$nickname.'</a>';
575 # Try to find profiles that listen to this profile and that have this nickname
576 $recipient = new Profile();
577 # XXX: chokety and bad
578 $recipient->whereAdd('EXISTS (SELECT subscriber from subscription where subscribed = '.$sender_id.' and subscriber = id)', 'AND');
579 $recipient->whereAdd('nickname = "' . trim($nickname) . '"', 'AND');
580 if ($recipient->find(TRUE)) {
581 return '<a href="'.htmlspecialchars($recipient->profileurl).'" class="atlink tolistener">'.$nickname.'</a>';
583 # If this is a local user, try to find a local user with that nickname.
584 $sender = User::staticGet($sender_id);
586 $recipient_user = User::staticGet('nickname', $nickname);
587 if ($recipient_user) {
588 return '<a href="'.htmlspecialchars(common_profile_url($nickname)).'" class="atlink usertouser">'.$nickname.'</a>';
591 # Otherwise, no links. @messages from local users to remote users,
592 # or from remote users to other remote users, are just
593 # outside our ability to make intelligent guesses about
597 // where should the avatar go for this user?
599 function common_avatar_filename($id, $extension, $size=NULL, $extra=NULL) {
603 return $id . '-' . $size . (($extra) ? ('-' . $extra) : '') . $extension;
605 return $id . '-original' . (($extra) ? ('-' . $extra) : '') . $extension;
609 function common_avatar_path($filename) {
611 return INSTALLDIR . '/avatar/' . $filename;
614 function common_avatar_url($filename) {
615 return common_path('avatar/'.$filename);
618 function common_default_avatar($size) {
619 static $sizenames = array(AVATAR_PROFILE_SIZE => 'profile',
620 AVATAR_STREAM_SIZE => 'stream',
621 AVATAR_MINI_SIZE => 'mini');
622 return theme_path('default-avatar-'.$sizenames[$size].'.png');
625 function common_local_url($action, $args=NULL) {
627 if ($config['site']['fancy']) {
628 return common_fancy_url($action, $args);
630 return common_simple_url($action, $args);
634 function common_fancy_url($action, $args=NULL) {
635 switch (strtolower($action)) {
637 if ($args && $args['page']) {
638 return common_path('?page=' . $args['page']);
640 return common_path('');
643 return common_path('rss');
645 return common_path('xrds');
647 return common_path('doc/'.$args['title']);
653 return common_path('main/'.$action);
655 return common_path('main/openid');
658 return common_path('settings/'.$action);
659 case 'profilesettings':
660 return common_path('settings/profile');
661 case 'openidsettings':
662 return common_path('settings/openid');
664 return common_path('notice/new');
666 return common_path('notice/'.$args['notice']);
669 return common_path($args['nickname'].'/'.$action);
670 case 'subscriptions':
673 if ($args && $args['page']) {
674 return common_path($args['nickname'].'/'.$action.'?page=' . $args['page']);
676 return common_path($args['nickname'].'/'.$action);
679 return common_path($args['nickname'].'/all/rss');
681 return common_path($args['nickname'].'/rss');
683 if ($args && $args['page']) {
684 return common_path($args['nickname'].'?page=' . $args['page']);
686 return common_path($args['nickname']);
688 case 'confirmaddress':
689 return common_path('main/confirmaddress/'.$args['code']);
691 return common_path('user/'.$args['id']);
692 case 'recoverpassword':
693 $path = 'main/recoverpassword';
695 $path .= '/' . $args['code'];
697 return common_path($path);
699 return common_path('settings/im');
701 return common_simple_url($action, $args);
705 function common_simple_url($action, $args=NULL) {
707 /* XXX: pretty URLs */
710 foreach ($args as $key => $value) {
711 $extra .= "&${key}=${value}";
714 return common_path("index.php?action=${action}${extra}");
717 function common_path($relative) {
719 $pathpart = ($config['site']['path']) ? $config['site']['path']."/" : '';
720 return "http://".$config['site']['server'].'/'.$pathpart.$relative;
723 function common_date_string($dt) {
724 // XXX: do some sexy date formatting
725 // return date(DATE_RFC822, $dt);
729 function common_date_w3dtf($dt) {
731 return date(DATE_W3C, $t);
734 function common_redirect($url, $code=307) {
735 static $status = array(301 => "Moved Permanently",
738 307 => "Temporary Redirect");
739 header("Status: ${code} $status[$code]");
740 header("Location: $url");
742 common_start_xml('a',
743 '-//W3C//DTD XHTML 1.0 Strict//EN',
744 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
745 common_element('a', array('href' => $url), $url);
749 function common_broadcast_notice($notice, $remote=false) {
750 // XXX: optionally use a queue system like http://code.google.com/p/microapps/wiki/NQDQ
752 # Make sure we have the OMB stuff
753 require_once(INSTALLDIR.'/lib/omb.php');
754 omb_broadcast_remote_subscribers($notice);
756 require_once(INSTALLDIR.'/lib/jabber.php');
757 jabber_broadcast_notice($notice);
758 // XXX: broadcast notices to SMS
759 // XXX: broadcast notices to other IM
763 function common_broadcast_profile($profile) {
764 // XXX: optionally use a queue system like http://code.google.com/p/microapps/wiki/NQDQ
765 require_once(INSTALLDIR.'/lib/omb.php');
766 omb_broadcast_profile($profile);
767 // XXX: Other broadcasts...?
771 function common_profile_url($nickname) {
772 return common_local_url('showstream', array('nickname' => $nickname));
775 # Don't call if nobody's logged in
777 function common_notice_form($action=NULL, $content=NULL) {
778 $user = common_current_user();
779 assert(!is_null($user));
780 common_element_start('form', array('id' => 'status_form',
782 'action' => common_local_url('newnotice')));
783 common_element_start('p');
784 common_element('label', array('for' => 'status_update',
785 'id' => 'status_label'),
786 _t('What\'s up, ').$user->nickname.'?');
787 common_element('textarea', array('id' => 'status_textarea',
788 'name' => 'status_textarea'),
789 ($content) ? $content : ' ');
791 common_hidden('returnto', $action);
793 common_element('input', array('id' => 'status_submit',
794 'name' => 'status_submit',
796 'value' => _t('Send')));
797 common_element('span', 'input_instructions',
798 _t('Your current status, max 140 characters'));
799 common_element_end('p');
800 common_element_end('form');
803 function common_mint_tag($extra) {
806 'tag:'.$config['tag']['authority'].','.
807 $config['tag']['date'].':'.$config['tag']['prefix'].$extra;
810 # Should make up a reasonable root URL
812 function common_root_url() {
813 return common_path('');
816 # returns $bytes bytes of random data as a hexadecimal string
817 # "good" here is a goal and not a guarantee
819 function common_good_rand($bytes) {
820 # XXX: use random.org...?
821 if (file_exists('/dev/urandom')) {
822 return common_urandom($bytes);
823 } else { # FIXME: this is probably not good enough
824 return common_mtrand($bytes);
828 function common_urandom($bytes) {
829 $h = fopen('/dev/urandom', 'rb');
831 $src = fread($h, $bytes);
834 for ($i = 0; $i < $bytes; $i++) {
835 $enc .= sprintf("%02x", (ord($src[$i])));
840 function common_mtrand($bytes) {
842 for ($i = 0; $i < $bytes; $i++) {
843 $enc .= sprintf("%02x", mt_rand(0, 255));
848 function common_set_returnto($url) {
849 common_ensure_session();
850 $_SESSION['returnto'] = $url;
853 function common_get_returnto() {
854 common_ensure_session();
855 return $_SESSION['returnto'];
858 function common_timestamp() {
859 return date('YmdHis');
862 // XXX: set up gettext
868 function common_ensure_syslog() {
869 static $initialized = false;
872 define_syslog_variables();
873 openlog($config['syslog']['appname'], 0, LOG_USER);
878 function common_log($priority, $msg, $filename=NULL) {
879 common_ensure_syslog();
880 syslog($priority, $msg);
883 function common_debug($msg, $filename=NULL) {
885 common_log(LOG_DEBUG, basename($filename).' - '.$msg);
887 common_log(LOG_DEBUG, $msg);
891 function common_log_db_error(&$object, $verb, $filename=NULL) {
892 $objstr = common_log_objstring($object);
893 $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
894 common_log(LOG_ERROR, $last_error->message . '(' . $verb . ' on ' . $objstr . ')', $filename);
897 function common_log_objstring(&$object) {
898 if (is_null($object)) {
901 $arr = $object->toArray();
903 foreach ($arr as $k => $v) {
904 $fields[] = "$k='$v'";
906 $objstring = $object->tableName() . '[' . implode(',', $fields) . ']';
910 function common_valid_http_url($url) {
911 return Validate::uri($url, array('allowed_schemes' => array('http', 'https')));
914 function common_valid_tag($tag) {
915 if (preg_match('/^tag:(.*?),(\d{4}(-\d{2}(-\d{2})?)?):(.*)$/', $tag, $matches)) {
916 return (Validate::email($matches[1]) ||
917 preg_match('/^([\w-\.]+)$/', $matches[1]));
922 # Does a little before-after block for next/prev page
924 function common_pagination($have_before, $have_after, $page, $action, $args=NULL) {
926 if ($have_before || $have_after) {
927 common_element_start('div', array('id' => 'pagination'));
928 common_element_start('ul', array('id' => 'nav_pagination'));
932 $pargs = array('page' => $page-1);
933 $newargs = ($args) ? array_merge($args,$pargs) : $pargs;
935 common_element_start('li', 'before');
936 common_element('a', array('href' => common_local_url($action, $newargs)),
938 common_element_end('li');
942 $pargs = array('page' => $page+1);
943 $newargs = ($args) ? array_merge($args,$pargs) : $pargs;
944 common_element_start('li', 'after');
945 common_element('a', array('href' => common_local_url($action, $newargs)),
947 common_element_end('li');
950 if ($have_before || $have_after) {
951 common_element_end('ul');
952 common_element_end('div');
956 /* Following functions are copied from MediaWiki GlobalFunctions.php
957 * and written by Evan Prodromou. */
959 function common_accept_to_prefs($accept, $def = '*/*') {
960 # No arg means accept anything (per HTTP spec)
962 return array($def => 1);
967 $parts = explode(',', $accept);
969 foreach($parts as $part) {
970 # FIXME: doesn't deal with params like 'text/html; level=1'
971 @list($value, $qpart) = explode(';', $part);
975 } elseif(preg_match('/q\s*=\s*(\d*\.\d+)/', $qpart, $match)) {
976 $prefs[$value] = $match[1];
983 function common_mime_type_match($type, $avail) {
984 if(array_key_exists($type, $avail)) {
987 $parts = explode('/', $type);
988 if(array_key_exists($parts[0] . '/*', $avail)) {
989 return $parts[0] . '/*';
990 } elseif(array_key_exists('*/*', $avail)) {
998 function common_negotiate_type($cprefs, $sprefs) {
1001 foreach(array_keys($sprefs) as $type) {
1002 $parts = explode('/', $type);
1003 if($parts[1] != '*') {
1004 $ckey = common_mime_type_match($type, $cprefs);
1006 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
1011 foreach(array_keys($cprefs) as $type) {
1012 $parts = explode('/', $type);
1013 if($parts[1] != '*' && !array_key_exists($type, $sprefs)) {
1014 $skey = common_mime_type_match($type, $sprefs);
1016 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
1024 foreach(array_keys($combine) as $type) {
1025 if($combine[$type] > $bestq) {
1027 $bestq = $combine[$type];
1034 function common_config($main, $sub) {
1036 return $config[$main][$sub];
1039 function common_copy_args($from) {
1041 $strip = get_magic_quotes_gpc();
1042 foreach ($from as $k => $v) {
1043 $to[$k] = ($strip) ? stripslashes($v) : $v;
1048 function common_user_uri(&$user) {
1049 return common_local_url('userbyid', array('id' => $user->id));
1052 function common_notice_uri(&$notice) {
1053 return common_local_url('shownotice',
1054 array('notice' => $notice->id));
1057 # 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
1059 function common_confirmation_code($bits) {
1060 # 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
1061 static $codechars = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ';
1062 $chars = ceil($bits/5);
1064 for ($i = 0; $i < $chars; $i++) {
1065 # XXX: convert to string and back
1066 $num = hexdec(common_good_rand(1));
1067 $code .= $codechars[$num%32];