gnu-social/lib/util.php

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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* XXX: break up into separate modules (HTTP, user, files) */
// Show a server error
function common_server_error($msg, $code=500)
{
$err = new ServerErrorAction($msg, $code);
$err->showPage();
}
// Show a user error
function common_user_error($msg, $code=400)
{
$err = new ClientErrorAction($msg, $code);
$err->showPage();
}
function common_init_locale($language=null)
{
if(!$language) {
$language = common_language();
}
putenv('LANGUAGE='.$language);
putenv('LANG='.$language);
return setlocale(LC_ALL, $language . ".utf8",
$language . ".UTF8",
$language . ".utf-8",
$language . ".UTF-8",
$language);
}
function common_init_language()
{
mb_internal_encoding('UTF-8');
$language = common_language();
// So we don't have to make people install the gettext locales
$locale_set = common_init_locale($language);
bindtextdomain("laconica", common_config('site','locale_path'));
bind_textdomain_codeset("laconica", "UTF-8");
textdomain("laconica");
setlocale(LC_CTYPE, 'C');
if(!$locale_set) {
common_log(LOG_INFO,'Language requested:'.$language.' - locale could not be set:',__FILE__);
}
}
function common_timezone()
{
if (common_logged_in()) {
$user = common_current_user();
if ($user->timezone) {
return $user->timezone;
}
}
return common_config('site', 'timezone');
}
function common_language()
{
// If there is a user logged in and they've set a language preference
// then return that one...
if (_have_config() && common_logged_in()) {
$user = common_current_user();
$user_language = $user->language;
if ($user_language)
return $user_language;
}
// Otherwise, find the best match for the languages requested by the
// user's browser...
$httplang = isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) ? $_SERVER['HTTP_ACCEPT_LANGUAGE'] : null;
if (!empty($httplang)) {
$language = client_prefered_language($httplang);
if ($language)
return $language;
}
// Finally, if none of the above worked, use the site's default...
return common_config('site', 'language');
}
// salted, hashed passwords are stored in the DB
function common_munge_password($password, $id)
{
return md5($password . $id);
}
// check if a username exists and has matching password
function common_check_user($nickname, $password)
{
// NEVER allow blank passwords, even if they match the DB
if (mb_strlen($password) == 0) {
return false;
}
$user = User::staticGet('nickname', $nickname);
if (is_null($user)) {
return false;
} else {
if (0 == strcmp(common_munge_password($password, $user->id),
$user->password)) {
return $user;
} else {
return false;
}
}
}
// is the current user logged in?
function common_logged_in()
{
return (!is_null(common_current_user()));
}
function common_have_session()
{
return (0 != strcmp(session_id(), ''));
}
function common_ensure_session()
{
if (!common_have_session()) {
@session_start();
}
}
// Three kinds of arguments:
// 1) a user object
// 2) a nickname
// 3) null to clear
// Initialize to false; set to null if none found
$_cur = false;
function common_set_user($user)
{
global $_cur;
if (is_null($user) && common_have_session()) {
$_cur = null;
unset($_SESSION['userid']);
return true;
} else if (is_string($user)) {
$nickname = $user;
$user = User::staticGet('nickname', $nickname);
} else if (!($user instanceof User)) {
return false;
}
if ($user) {
common_ensure_session();
$_SESSION['userid'] = $user->id;
$_cur = $user;
return $_cur;
}
return false;
}
function common_set_cookie($key, $value, $expiration=0)
{
$path = common_config('site', 'path');
$server = common_config('site', 'server');
if ($path && ($path != '/')) {
$cookiepath = '/' . $path . '/';
} else {
$cookiepath = '/';
}
return setcookie($key,
$value,
$expiration,
$cookiepath,
$server);
}
define('REMEMBERME', 'rememberme');
define('REMEMBERME_EXPIRY', 30 * 24 * 60 * 60); // 30 days
function common_rememberme($user=null)
{
if (!$user) {
$user = common_current_user();
if (!$user) {
common_debug('No current user to remember', __FILE__);
return false;
}
}
$rm = new Remember_me();
$rm->code = common_good_rand(16);
$rm->user_id = $user->id;
// Wrap the insert in some good ol' fashioned transaction code
$rm->query('BEGIN');
$result = $rm->insert();
if (!$result) {
common_log_db_error($rm, 'INSERT', __FILE__);
common_debug('Error adding rememberme record for ' . $user->nickname, __FILE__);
return false;
}
$rm->query('COMMIT');
common_debug('Inserted rememberme record (' . $rm->code . ', ' . $rm->user_id . '); result = ' . $result . '.', __FILE__);
$cookieval = $rm->user_id . ':' . $rm->code;
common_log(LOG_INFO, 'adding rememberme cookie "' . $cookieval . '" for ' . $user->nickname);
common_set_cookie(REMEMBERME, $cookieval, time() + REMEMBERME_EXPIRY);
return true;
}
function common_remembered_user()
{
$user = null;
$packed = isset($_COOKIE[REMEMBERME]) ? $_COOKIE[REMEMBERME] : null;
if (!$packed) {
return null;
}
list($id, $code) = explode(':', $packed);
if (!$id || !$code) {
common_log(LOG_WARNING, 'Malformed rememberme cookie: ' . $packed);
common_forgetme();
return null;
}
$rm = Remember_me::staticGet($code);
if (!$rm) {
common_log(LOG_WARNING, 'No such remember code: ' . $code);
common_forgetme();
return null;
}
if ($rm->user_id != $id) {
common_log(LOG_WARNING, 'Rememberme code for wrong user: ' . $rm->user_id . ' != ' . $id);
common_forgetme();
return null;
}
$user = User::staticGet($rm->user_id);
if (!$user) {
common_log(LOG_WARNING, 'No such user for rememberme: ' . $rm->user_id);
common_forgetme();
return null;
}
// successful!
$result = $rm->delete();
if (!$result) {
common_log_db_error($rm, 'DELETE', __FILE__);
common_log(LOG_WARNING, 'Could not delete rememberme: ' . $code);
common_forgetme();
return null;
}
common_log(LOG_INFO, 'logging in ' . $user->nickname . ' using rememberme code ' . $rm->code);
common_set_user($user);
common_real_login(false);
// We issue a new cookie, so they can log in
// automatically again after this session
common_rememberme($user);
return $user;
}
// must be called with a valid user!
function common_forgetme()
{
common_set_cookie(REMEMBERME, '', 0);
}
// who is the current user?
function common_current_user()
{
global $_cur;
if (!_have_config()) {
return null;
}
if ($_cur === false) {
if (isset($_REQUEST[session_name()]) || (isset($_SESSION['userid']) && $_SESSION['userid'])) {
common_ensure_session();
$id = isset($_SESSION['userid']) ? $_SESSION['userid'] : false;
if ($id) {
$_cur = User::staticGet($id);
return $_cur;
}
}
// that didn't work; try to remember; will init $_cur to null on failure
$_cur = common_remembered_user();
if ($_cur) {
common_debug("Got User " . $_cur->nickname);
common_debug("Faking session on remembered user");
// XXX: Is this necessary?
$_SESSION['userid'] = $_cur->id;
}
}
return $_cur;
}
// Logins that are 'remembered' aren't 'real' -- they're subject to
// cookie-stealing. So, we don't let them do certain things. New reg,
// OpenID, and password logins _are_ real.
function common_real_login($real=true)
{
common_ensure_session();
$_SESSION['real_login'] = $real;
}
function common_is_real_login()
{
return common_logged_in() && $_SESSION['real_login'];
}
// get canonical version of nickname for comparison
function common_canonical_nickname($nickname)
{
// XXX: UTF-8 canonicalization (like combining chars)
return strtolower($nickname);
}
// get canonical version of email for comparison
function common_canonical_email($email)
{
// XXX: canonicalize UTF-8
// XXX: lcase the domain part
return $email;
}
function common_render_content($text, $notice)
{
$r = common_render_text($text);
$id = $notice->profile_id;
$r = preg_replace('/(^|\s+)@([A-Za-z0-9]{1,64})/e', "'\\1@'.common_at_link($id, '\\2')", $r);
$r = preg_replace('/^T ([A-Z0-9]{1,64}) /e', "'T '.common_at_link($id, '\\1').' '", $r);
$r = preg_replace('/(^|\s+)@#([A-Za-z0-9]{1,64})/e', "'\\1@#'.common_at_hash_link($id, '\\2')", $r);
$r = preg_replace('/(^|\s)!([A-Za-z0-9]{1,64})/e', "'\\1!'.common_group_link($id, '\\2')", $r);
return $r;
}
function common_render_text($text)
{
$r = htmlspecialchars($text);
$r = preg_replace('/[\x{0}-\x{8}\x{b}-\x{c}\x{e}-\x{19}]/', '', $r);
$r = common_replace_urls_callback($r, 'common_linkify');
$r = preg_replace('/(^|\(|\[|\s+)#([A-Za-z0-9_\-\.]{1,64})/e', "'\\1#'.common_tag_link('\\2')", $r);
// XXX: machine tags
return $r;
}
function common_replace_urls_callback($text, $callback) {
// Start off with a regex
$regex = '#'.
'(?:'.
'(?:'.
'(?:https?|ftps?|mms|rtsp|gopher|news|nntp|telnet|wais|file|prospero|webcal|xmpp|irc)://'.
'|'.
'(?:mailto|aim|tel):'.
')'.
'[^.\s]+\.[^\s]+'.
'|'.
'(?:[^.\s/:]+\.)+'.
'(?:museum|travel|[a-z]{2,4})'.
'(?:[:/][^\s]*)?'.
')'.
'#ix';
preg_match_all($regex, $text, $matches);
// Then clean up what the regex left behind
$offset = 0;
foreach($matches[0] as $orig_url) {
$url = htmlspecialchars_decode($orig_url);
// Make sure we didn't pick up an email address
if (preg_match('#^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$#i', $url)) continue;
// Remove surrounding punctuation
$url = trim($url, '.?!,;:\'"`([<');
// Remove surrounding parens and the like
preg_match('/[)\]>]+$/', $url, $trailing);
if (isset($trailing[0])) {
preg_match_all('/[(\[<]/', $url, $opened);
preg_match_all('/[)\]>]/', $url, $closed);
$unopened = count($closed[0]) - count($opened[0]);
// Make sure not to take off more closing parens than there are at the end
$unopened = ($unopened > mb_strlen($trailing[0])) ? mb_strlen($trailing[0]):$unopened;
$url = ($unopened > 0) ? mb_substr($url, 0, $unopened * -1):$url;
}
// Remove trailing punctuation again (in case there were some inside parens)
$url = rtrim($url, '.?!,;:\'"`');
// Make sure we didn't capture part of the next sentence
preg_match('#((?:[^.\s/]+\.)+)(museum|travel|[a-z]{2,4})#i', $url, $url_parts);
// Were the parts capitalized any?
$last_part = (mb_strtolower($url_parts[2]) !== $url_parts[2]) ? true:false;
$prev_part = (mb_strtolower($url_parts[1]) !== $url_parts[1]) ? true:false;
// If the first part wasn't cap'd but the last part was, we captured too much
if ((!$prev_part && $last_part)) {
$url = mb_substr($url, 0 , mb_strpos($url, '.'.$url_parts['2'], 0));
}
// Capture the new TLD
preg_match('#((?:[^.\s/]+\.)+)(museum|travel|[a-z]{2,4})#i', $url, $url_parts);
$tlds = array('ac', 'ad', 'ae', 'aero', 'af', 'ag', 'ai', 'al', 'am', 'an', 'ao', 'aq', 'ar', 'arpa', 'as', 'asia', 'at', 'au', 'aw', 'ax', 'az', 'ba', 'bb', 'bd', 'be', 'bf', 'bg', 'bh', 'bi', 'biz', 'bj', 'bm', 'bn', 'bo', 'br', 'bs', 'bt', 'bv', 'bw', 'by', 'bz', 'ca', 'cat', 'cc', 'cd', 'cf', 'cg', 'ch', 'ci', 'ck', 'cl', 'cm', 'cn', 'co', 'com', 'coop', 'cr', 'cu', 'cv', 'cx', 'cy', 'cz', 'de', 'dj', 'dk', 'dm', 'do', 'dz', 'ec', 'edu', 'ee', 'eg', 'er', 'es', 'et', 'eu', 'fi', 'fj', 'fk', 'fm', 'fo', 'fr', 'ga', 'gb', 'gd', 'ge', 'gf', 'gg', 'gh', 'gi', 'gl', 'gm', 'gn', 'gov', 'gp', 'gq', 'gr', 'gs', 'gt', 'gu', 'gw', 'gy', 'hk', 'hm', 'hn', 'hr', 'ht', 'hu', 'id', 'ie', 'il', 'im', 'in', 'info', 'int', 'io', 'iq', 'ir', 'is', 'it', 'je', 'jm', 'jo', 'jobs', 'jp', 'ke', 'kg', 'kh', 'ki', 'km', 'kn', 'kp', 'kr', 'kw', 'ky', 'kz', 'la', 'lb', 'lc', 'li', 'lk', 'lr', 'ls', 'lt', 'lu', 'lv', 'ly', 'ma', 'mc', 'md', 'me', 'mg', 'mh', 'mil', 'mk', 'ml', 'mm', 'mn', 'mo', 'mobi', 'mp', 'mq', 'mr', 'ms', 'mt', 'mu', 'museum', 'mv', 'mw', 'mx', 'my', 'mz', 'na', 'name', 'nc', 'ne', 'net', 'nf', 'ng', 'ni', 'nl', 'no', 'np', 'nr', 'nu', 'nz', 'om', 'org', 'pa', 'pe', 'pf', 'pg', 'ph', 'pk', 'pl', 'pm', 'pn', 'pr', 'pro', 'ps', 'pt', 'pw', 'py', 'qa', 're', 'ro', 'rs', 'ru', 'rw', 'sa', 'sb', 'sc', 'sd', 'se', 'sg', 'sh', 'si', 'sj', 'sk', 'sl', 'sm', 'sn', 'so', 'sr', 'st', 'su', 'sv', 'sy', 'sz', 'tc', 'td', 'tel', 'tf', 'tg', 'th', 'tj', 'tk', 'tl', 'tm', 'tn', 'to', 'tp', 'tr', 'travel', 'tt', 'tv', 'tw', 'tz', 'ua', 'ug', 'uk', 'us', 'uy', 'uz', 'va', 'vc', 've', 'vg', 'vi', 'vn', 'vu', 'wf', 'ws', 'ye', 'yt', 'yu', 'za', 'zm', 'zw');
if (!in_array($url_parts[2], $tlds)) continue;
// Make sure we didn't capture a hash tag
if (strpos($url, '#') === 0) continue;
// Put the url back the way we found it.
$url = (mb_strpos($orig_url, htmlspecialchars($url)) === FALSE) ? $url:htmlspecialchars($url);
// Call user specified func
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$modified_url = call_user_func($callback, $url);
// Replace it!
$start = mb_strpos($text, $url, $offset);
$text = mb_substr($text, 0, $start).$modified_url.mb_substr($text, $start + mb_strlen($url), mb_strlen($text));
$offset = $start + mb_strlen($modified_url);
}
return $text;
}
function common_linkify($url) {
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// It comes in special'd, so we unspecial it before passing to the stringifying
// functions
$url = htmlspecialchars_decode($url);
$display = $url;
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$url = (!preg_match('#^([a-z]+://|(mailto|aim|tel):)#i', $url)) ? 'http://'.$url : $url;
$attrs = array('href' => $url, 'rel' => 'external');
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if ($longurl = common_longurl($url)) {
$attrs['title'] = $longurl;
}
return XMLStringer::estring('a', $attrs, $display);
}
function common_longurl($short_url)
{
$long_url = common_shorten_link($short_url, true);
if ($long_url === $short_url) return false;
return $long_url;
}
function common_longurl2($uri)
{
$uri_e = urlencode($uri);
$longurl = unserialize(file_get_contents("http://api.longurl.org/v1/expand?format=php&url=$uri_e"));
if (empty($longurl['long_url']) || $uri === $longurl['long_url']) return false;
return stripslashes($longurl['long_url']);
}
function common_shorten_links($text)
{
if (mb_strlen($text) <= 140) return $text;
static $cache = array();
if (isset($cache[$text])) return $cache[$text];
// \s = not a horizontal whitespace character (since PHP 5.2.4)
return $cache[$text] = common_replace_urls_callback($text, 'common_shorten_link');;
}
function common_shorten_link($url, $reverse = false)
{
static $url_cache = array();
if ($reverse) return isset($url_cache[$url]) ? $url_cache[$url] : $url;
$user = common_current_user();
$curlh = curl_init();
curl_setopt($curlh, CURLOPT_CONNECTTIMEOUT, 20); // # seconds to wait
curl_setopt($curlh, CURLOPT_USERAGENT, 'Laconica');
curl_setopt($curlh, CURLOPT_RETURNTRANSFER, true);
switch($user->urlshorteningservice) {
case 'ur1.ca':
$short_url_service = new LilUrl;
$short_url = $short_url_service->shorten($url);
break;
case '2tu.us':
$short_url_service = new TightUrl;
$short_url = $short_url_service->shorten($url);
break;
case 'ptiturl.com':
$short_url_service = new PtitUrl;
$short_url = $short_url_service->shorten($url);
break;
case 'bit.ly':
curl_setopt($curlh, CURLOPT_URL, 'http://bit.ly/api?method=shorten&long_url='.urlencode($url));
$short_url = current(json_decode(curl_exec($curlh))->results)->hashUrl;
break;
case 'is.gd':
curl_setopt($curlh, CURLOPT_URL, 'http://is.gd/api.php?longurl='.urlencode($url));
$short_url = curl_exec($curlh);
break;
case 'snipr.com':
curl_setopt($curlh, CURLOPT_URL, 'http://snipr.com/site/snip?r=simple&link='.urlencode($url));
$short_url = curl_exec($curlh);
break;
case 'metamark.net':
curl_setopt($curlh, CURLOPT_URL, 'http://metamark.net/api/rest/simple?long_url='.urlencode($url));
$short_url = curl_exec($curlh);
break;
case 'tinyurl.com':
curl_setopt($curlh, CURLOPT_URL, 'http://tinyurl.com/api-create.php?url='.urlencode($url));
$short_url = curl_exec($curlh);
break;
default:
$short_url = false;
}
curl_close($curlh);
if ($short_url) {
$url_cache[(string)$short_url] = $url;
return (string)$short_url;
}
return $url;
}
function common_xml_safe_str($str)
{
$xmlStr = htmlentities(iconv('UTF-8', 'UTF-8//IGNORE', $str), ENT_NOQUOTES, 'UTF-8');
// Replace control, formatting, and surrogate characters with '*', ala Twitter
return preg_replace('/[\p{Cc}\p{Cf}\p{Cs}]/u', '*', $str);
}
function common_tag_link($tag)
{
$canonical = common_canonical_tag($tag);
$url = common_local_url('tag', array('tag' => $canonical));
$xs = new XMLStringer();
$xs->elementStart('span', 'tag');
$xs->element('a', array('href' => $url,
'rel' => 'tag'),
$tag);
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$xs->elementEnd('span');
return $xs->getString();
}
function common_canonical_tag($tag)
{
return strtolower(str_replace(array('-', '_', '.'), '', $tag));
}
function common_valid_profile_tag($str)
{
return preg_match('/^[A-Za-z0-9_\-\.]{1,64}$/', $str);
}
function common_at_link($sender_id, $nickname)
{
$sender = Profile::staticGet($sender_id);
$recipient = common_relative_profile($sender, common_canonical_nickname($nickname));
if ($recipient) {
$user = User::staticGet('id', $recipient->id);
if ($user) {
$url = common_local_url('userbyid', array('id' => $user->id));
} else {
$url = $recipient->profileurl;
}
$xs = new XMLStringer(false);
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$attrs = array('href' => $url,
'class' => 'url');
if (!empty($recipient->fullname)) {
$attrs['title'] = $recipient->fullname . ' (' . $recipient->nickname . ')';
}
$xs->elementStart('span', 'vcard');
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$xs->elementStart('a', $attrs);
$xs->element('span', 'fn nickname', $nickname);
$xs->elementEnd('a');
$xs->elementEnd('span');
return $xs->getString();
} else {
return $nickname;
}
}
function common_group_link($sender_id, $nickname)
{
$sender = Profile::staticGet($sender_id);
$group = User_group::staticGet('nickname', common_canonical_nickname($nickname));
if ($group && $sender->isMember($group)) {
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$attrs = array('href' => $group->permalink(),
'class' => 'url');
if (!empty($group->fullname)) {
$attrs['title'] = $group->fullname . ' (' . $group->nickname . ')';
}
$xs = new XMLStringer();
$xs->elementStart('span', 'vcard');
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$xs->elementStart('a', $attrs);
$xs->element('span', 'fn nickname', $nickname);
$xs->elementEnd('a');
$xs->elementEnd('span');
return $xs->getString();
} else {
return $nickname;
}
}
function common_at_hash_link($sender_id, $tag)
{
$user = User::staticGet($sender_id);
if (!$user) {
return $tag;
}
$tagged = Profile_tag::getTagged($user->id, common_canonical_tag($tag));
if ($tagged) {
$url = common_local_url('subscriptions',
array('nickname' => $user->nickname,
'tag' => $tag));
$xs = new XMLStringer();
$xs->elementStart('span', 'tag');
$xs->element('a', array('href' => $url,
'rel' => $tag),
$tag);
$xs->elementEnd('span');
return $xs->getString();
} else {
return $tag;
}
}
function common_relative_profile($sender, $nickname, $dt=null)
{
// Try to find profiles this profile is subscribed to that have this nickname
$recipient = new Profile();
// XXX: use a join instead of a subquery
$recipient->whereAdd('EXISTS (SELECT subscribed from subscription where subscriber = '.$sender->id.' and subscribed = id)', 'AND');
$recipient->whereAdd("nickname = '" . trim($nickname) . "'", 'AND');
if ($recipient->find(true)) {
// XXX: should probably differentiate between profiles with
// the same name by date of most recent update
return $recipient;
}
// Try to find profiles that listen to this profile and that have this nickname
$recipient = new Profile();
// XXX: use a join instead of a subquery
$recipient->whereAdd('EXISTS (SELECT subscriber from subscription where subscribed = '.$sender->id.' and subscriber = id)', 'AND');
$recipient->whereAdd("nickname = '" . trim($nickname) . "'", 'AND');
if ($recipient->find(true)) {
// XXX: should probably differentiate between profiles with
// the same name by date of most recent update
return $recipient;
}
// If this is a local user, try to find a local user with that nickname.
$sender = User::staticGet($sender->id);
if ($sender) {
$recipient_user = User::staticGet('nickname', $nickname);
if ($recipient_user) {
return $recipient_user->getProfile();
}
}
// Otherwise, no links. @messages from local users to remote users,
// or from remote users to other remote users, are just
// outside our ability to make intelligent guesses about
return null;
}
function common_local_url($action, $args=null, $params=null, $fragment=null)
{
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$r = Router::get();
$path = $r->build($action, $args, $params, $fragment);
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if (common_config('site','fancy')) {
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$url = common_path(mb_substr($path, 1));
} else {
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if (mb_strpos($path, '/index.php') === 0) {
$url = common_path(mb_substr($path, 1));
} else {
$url = common_path('index.php'.$path);
}
}
return $url;
}
function common_path($relative)
{
$pathpart = (common_config('site', 'path')) ? common_config('site', 'path')."/" : '';
return "http://".common_config('site', 'server').'/'.$pathpart.$relative;
}
function common_date_string($dt)
{
// XXX: do some sexy date formatting
// return date(DATE_RFC822, $dt);
$t = strtotime($dt);
$now = time();
$diff = $now - $t;
if ($now < $t) { // that shouldn't happen!
return common_exact_date($dt);
} else if ($diff < 60) {
return _('a few seconds ago');
} else if ($diff < 92) {
return _('about a minute ago');
} else if ($diff < 3300) {
return sprintf(_('about %d minutes ago'), round($diff/60));
} else if ($diff < 5400) {
return _('about an hour ago');
} else if ($diff < 22 * 3600) {
return sprintf(_('about %d hours ago'), round($diff/3600));
} else if ($diff < 37 * 3600) {
return _('about a day ago');
} else if ($diff < 24 * 24 * 3600) {
return sprintf(_('about %d days ago'), round($diff/(24*3600)));
} else if ($diff < 46 * 24 * 3600) {
return _('about a month ago');
} else if ($diff < 330 * 24 * 3600) {
return sprintf(_('about %d months ago'), round($diff/(30*24*3600)));
} else if ($diff < 480 * 24 * 3600) {
return _('about a year ago');
} else {
return common_exact_date($dt);
}
}
function common_exact_date($dt)
{
static $_utc;
static $_siteTz;
if (!$_utc) {
$_utc = new DateTimeZone('UTC');
$_siteTz = new DateTimeZone(common_timezone());
}
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, $_utc);
$d->setTimezone($_siteTz);
return $d->format(DATE_RFC850);
}
function common_date_w3dtf($dt)
{
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, new DateTimeZone('UTC'));
$d->setTimezone(new DateTimeZone(common_timezone()));
return $d->format(DATE_W3C);
}
function common_date_rfc2822($dt)
{
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, new DateTimeZone('UTC'));
$d->setTimezone(new DateTimeZone(common_timezone()));
return $d->format('r');
}
function common_date_iso8601($dt)
{
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, new DateTimeZone('UTC'));
$d->setTimezone(new DateTimeZone(common_timezone()));
return $d->format('c');
}
function common_sql_now()
{
return strftime('%Y-%m-%d %H:%M:%S', time());
}
function common_redirect($url, $code=307)
{
static $status = array(301 => "Moved Permanently",
302 => "Found",
303 => "See Other",
307 => "Temporary Redirect");
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header("Status: ${code} $status[$code]");
header("Location: $url");
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$xo = new XMLOutputter();
$xo->startXML('a',
'-//W3C//DTD XHTML 1.0 Strict//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
$xo->element('a', array('href' => $url), $url);
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$xo->endXML();
exit;
}
function common_broadcast_notice($notice, $remote=false)
{
if (common_config('queue', 'enabled')) {
// Do it later!
return common_enqueue_notice($notice);
} else {
return common_real_broadcast($notice, $remote);
}
}
// Stick the notice on the queue
function common_enqueue_notice($notice)
{
foreach (array('jabber', 'omb', 'sms', 'public', 'twitter', 'facebook', 'ping') as $transport) {
$qi = new Queue_item();
$qi->notice_id = $notice->id;
$qi->transport = $transport;
$qi->created = $notice->created;
$result = $qi->insert();
if (!$result) {
$last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
common_log(LOG_ERR, 'DB error inserting queue item: ' . $last_error->message);
return false;
}
common_log(LOG_DEBUG, 'complete queueing notice ID = ' . $notice->id . ' for ' . $transport);
}
return $result;
}
function common_real_broadcast($notice, $remote=false)
{
$success = true;
if (!$remote) {
// Make sure we have the OMB stuff
require_once(INSTALLDIR.'/lib/omb.php');
$success = omb_broadcast_remote_subscribers($notice);
if (!$success) {
common_log(LOG_ERR, 'Error in OMB broadcast for notice ' . $notice->id);
}
}
if ($success) {
require_once(INSTALLDIR.'/lib/jabber.php');
$success = jabber_broadcast_notice($notice);
if (!$success) {
common_log(LOG_ERR, 'Error in jabber broadcast for notice ' . $notice->id);
}
}
if ($success) {
require_once(INSTALLDIR.'/lib/mail.php');
$success = mail_broadcast_notice_sms($notice);
if (!$success) {
common_log(LOG_ERR, 'Error in sms broadcast for notice ' . $notice->id);
}
}
if ($success) {
$success = jabber_public_notice($notice);
if (!$success) {
common_log(LOG_ERR, 'Error in public broadcast for notice ' . $notice->id);
}
}
if ($success) {
$success = broadcast_twitter($notice);
if (!$success) {
common_log(LOG_ERR, 'Error in Twitter broadcast for notice ' . $notice->id);
}
}
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// XXX: Do a real-time FB broadcast here?
// XXX: broadcast notices to other IM
return $success;
}
function common_broadcast_profile($profile)
{
// XXX: optionally use a queue system like http://code.google.com/p/microapps/wiki/NQDQ
require_once(INSTALLDIR.'/lib/omb.php');
omb_broadcast_profile($profile);
// XXX: Other broadcasts...?
return true;
}
function common_profile_url($nickname)
{
return common_local_url('showstream', array('nickname' => $nickname));
}
// Should make up a reasonable root URL
function common_root_url()
{
return common_path('');
}
// returns $bytes bytes of random data as a hexadecimal string
// "good" here is a goal and not a guarantee
function common_good_rand($bytes)
{
// XXX: use random.org...?
if (file_exists('/dev/urandom')) {
return common_urandom($bytes);
} else { // FIXME: this is probably not good enough
return common_mtrand($bytes);
}
}
function common_urandom($bytes)
{
$h = fopen('/dev/urandom', 'rb');
// should not block
$src = fread($h, $bytes);
fclose($h);
$enc = '';
for ($i = 0; $i < $bytes; $i++) {
$enc .= sprintf("%02x", (ord($src[$i])));
}
return $enc;
}
function common_mtrand($bytes)
{
$enc = '';
for ($i = 0; $i < $bytes; $i++) {
$enc .= sprintf("%02x", mt_rand(0, 255));
}
return $enc;
}
function common_set_returnto($url)
{
common_ensure_session();
$_SESSION['returnto'] = $url;
}
function common_get_returnto()
{
common_ensure_session();
return $_SESSION['returnto'];
}
function common_timestamp()
{
return date('YmdHis');
}
function common_ensure_syslog()
{
static $initialized = false;
if (!$initialized) {
openlog(common_config('syslog', 'appname'), 0, LOG_USER);
$initialized = true;
}
}
function common_log($priority, $msg, $filename=null)
{
$logfile = common_config('site', 'logfile');
if ($logfile) {
$log = fopen($logfile, "a");
if ($log) {
static $syslog_priorities = array('LOG_EMERG', 'LOG_ALERT', 'LOG_CRIT', 'LOG_ERR',
'LOG_WARNING', 'LOG_NOTICE', 'LOG_INFO', 'LOG_DEBUG');
$output = date('Y-m-d H:i:s') . ' ' . $syslog_priorities[$priority] . ': ' . $msg . "\n";
fwrite($log, $output);
fclose($log);
}
} else {
common_ensure_syslog();
syslog($priority, $msg);
}
}
function common_debug($msg, $filename=null)
{
if ($filename) {
common_log(LOG_DEBUG, basename($filename).' - '.$msg);
} else {
common_log(LOG_DEBUG, $msg);
}
}
function common_log_db_error(&$object, $verb, $filename=null)
{
$objstr = common_log_objstring($object);
$last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
common_log(LOG_ERR, $last_error->message . '(' . $verb . ' on ' . $objstr . ')', $filename);
}
function common_log_objstring(&$object)
{
if (is_null($object)) {
return "null";
}
$arr = $object->toArray();
$fields = array();
foreach ($arr as $k => $v) {
$fields[] = "$k='$v'";
}
$objstring = $object->tableName() . '[' . implode(',', $fields) . ']';
return $objstring;
}
function common_valid_http_url($url)
{
return Validate::uri($url, array('allowed_schemes' => array('http', 'https')));
}
function common_valid_tag($tag)
{
if (preg_match('/^tag:(.*?),(\d{4}(-\d{2}(-\d{2})?)?):(.*)$/', $tag, $matches)) {
return (Validate::email($matches[1]) ||
preg_match('/^([\w-\.]+)$/', $matches[1]));
}
return false;
}
/* Following functions are copied from MediaWiki GlobalFunctions.php
* and written by Evan Prodromou. */
function common_accept_to_prefs($accept, $def = '*/*')
{
// No arg means accept anything (per HTTP spec)
if(!$accept) {
return array($def => 1);
}
$prefs = array();
$parts = explode(',', $accept);
foreach($parts as $part) {
// FIXME: doesn't deal with params like 'text/html; level=1'
@list($value, $qpart) = explode(';', $part);
$match = array();
if(!isset($qpart)) {
$prefs[$value] = 1;
} elseif(preg_match('/q\s*=\s*(\d*\.\d+)/', $qpart, $match)) {
$prefs[$value] = $match[1];
}
}
return $prefs;
}
function common_mime_type_match($type, $avail)
{
if(array_key_exists($type, $avail)) {
return $type;
} else {
$parts = explode('/', $type);
if(array_key_exists($parts[0] . '/*', $avail)) {
return $parts[0] . '/*';
} elseif(array_key_exists('*/*', $avail)) {
return '*/*';
} else {
return null;
}
}
}
function common_negotiate_type($cprefs, $sprefs)
{
$combine = array();
foreach(array_keys($sprefs) as $type) {
$parts = explode('/', $type);
if($parts[1] != '*') {
$ckey = common_mime_type_match($type, $cprefs);
if($ckey) {
$combine[$type] = $sprefs[$type] * $cprefs[$ckey];
}
}
}
foreach(array_keys($cprefs) as $type) {
$parts = explode('/', $type);
if($parts[1] != '*' && !array_key_exists($type, $sprefs)) {
$skey = common_mime_type_match($type, $sprefs);
if($skey) {
$combine[$type] = $sprefs[$skey] * $cprefs[$type];
}
}
}
$bestq = 0;
$besttype = 'text/html';
foreach(array_keys($combine) as $type) {
if($combine[$type] > $bestq) {
$besttype = $type;
$bestq = $combine[$type];
}
}
if ('text/html' === $besttype) {
return "text/html; charset=utf-8";
}
return $besttype;
}
function common_config($main, $sub)
{
global $config;
return isset($config[$main][$sub]) ? $config[$main][$sub] : false;
}
function common_copy_args($from)
{
$to = array();
$strip = get_magic_quotes_gpc();
foreach ($from as $k => $v) {
$to[$k] = ($strip) ? stripslashes($v) : $v;
}
return $to;
}
// Neutralise the evil effects of magic_quotes_gpc in the current request.
// This is used before handing a request off to OAuthRequest::from_request.
function common_remove_magic_from_request()
{
if(get_magic_quotes_gpc()) {
$_POST=array_map('stripslashes',$_POST);
$_GET=array_map('stripslashes',$_GET);
}
}
function common_user_uri(&$user)
{
return common_local_url('userbyid', array('id' => $user->id));
}
function common_notice_uri(&$notice)
{
return common_local_url('shownotice',
array('notice' => $notice->id));
}
// 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
function common_confirmation_code($bits)
{
// 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
static $codechars = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ';
$chars = ceil($bits/5);
$code = '';
for ($i = 0; $i < $chars; $i++) {
// XXX: convert to string and back
$num = hexdec(common_good_rand(1));
// XXX: randomness is too precious to throw away almost
// 40% of the bits we get!
$code .= $codechars[$num%32];
}
return $code;
}
// convert markup to HTML
function common_markup_to_html($c)
{
$c = preg_replace('/%%action.(\w+)%%/e', "common_local_url('\\1')", $c);
$c = preg_replace('/%%doc.(\w+)%%/e', "common_local_url('doc', array('title'=>'\\1'))", $c);
$c = preg_replace('/%%(\w+).(\w+)%%/e', 'common_config(\'\\1\', \'\\2\')', $c);
return Markdown($c);
}
function common_profile_uri($profile)
{
if (!$profile) {
return null;
}
$user = User::staticGet($profile->id);
if ($user) {
return $user->uri;
}
$remote = Remote_profile::staticGet($profile->id);
if ($remote) {
return $remote->uri;
}
// XXX: this is a very bad profile!
return null;
}
function common_canonical_sms($sms)
{
// strip non-digits
preg_replace('/\D/', '', $sms);
return $sms;
}
function common_error_handler($errno, $errstr, $errfile, $errline, $errcontext)
{
switch ($errno) {
case E_USER_ERROR:
common_log(LOG_ERR, "[$errno] $errstr ($errfile:$errline)");
exit(1);
break;
case E_USER_WARNING:
common_log(LOG_WARNING, "[$errno] $errstr ($errfile:$errline)");
break;
case E_USER_NOTICE:
common_log(LOG_NOTICE, "[$errno] $errstr ($errfile:$errline)");
break;
}
// FIXME: show error page if we're on the Web
/* Don't execute PHP internal error handler */
return true;
}
function common_session_token()
{
common_ensure_session();
if (!array_key_exists('token', $_SESSION)) {
$_SESSION['token'] = common_good_rand(64);
}
return $_SESSION['token'];
}
function common_cache_key($extra)
{
return 'laconica:' . common_keyize(common_config('site', 'name')) . ':' . $extra;
}
function common_keyize($str)
{
$str = strtolower($str);
$str = preg_replace('/\s/', '_', $str);
return $str;
}
function common_memcache()
{
static $cache = null;
if (!common_config('memcached', 'enabled')) {
return null;
} else {
if (!$cache) {
$cache = new Memcache();
$servers = common_config('memcached', 'server');
if (is_array($servers)) {
foreach($servers as $server) {
$cache->addServer($server);
}
} else {
$cache->addServer($servers);
}
}
return $cache;
}
}
function common_compatible_license($from, $to)
{
// XXX: better compatibility check needed here!
return ($from == $to);
}