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gnu-social/plugins/OStatus/OStatusPlugin.php

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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009-2010, StatusNet, 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/>.
*/
/**
* @package OStatusPlugin
* @maintainer Brion Vibber <brion@status.net>
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/');
class FeedSubException extends Exception
{
}
class OStatusPlugin extends Plugin
{
/**
* Hook for RouterInitialized event.
*
* @param Net_URL_Mapper $m path-to-action mapper
* @return boolean hook return
*/
function onRouterInitialized($m)
{
// Discovery actions
$m->connect('.well-known/host-meta',
array('action' => 'hostmeta'));
$m->connect('main/xrd',
array('action' => 'userxrd'));
$m->connect('main/ownerxrd',
array('action' => 'ownerxrd'));
$m->connect('main/ostatus',
array('action' => 'ostatusinit'));
$m->connect('main/ostatus?nickname=:nickname',
array('action' => 'ostatusinit'), array('nickname' => '[A-Za-z0-9_-]+'));
$m->connect('main/ostatus?group=:group',
array('action' => 'ostatusinit'), array('group' => '[A-Za-z0-9_-]+'));
$m->connect('main/ostatussub',
array('action' => 'ostatussub'));
$m->connect('main/ostatusgroup',
array('action' => 'ostatusgroup'));
// PuSH actions
$m->connect('main/push/hub', array('action' => 'pushhub'));
$m->connect('main/push/callback/:feed',
array('action' => 'pushcallback'),
array('feed' => '[0-9]+'));
// Salmon endpoint
$m->connect('main/salmon/user/:id',
array('action' => 'usersalmon'),
array('id' => '[0-9]+'));
$m->connect('main/salmon/group/:id',
array('action' => 'groupsalmon'),
array('id' => '[0-9]+'));
return true;
}
/**
* Set up queue handlers for outgoing hub pushes
* @param QueueManager $qm
* @return boolean hook return
*/
function onEndInitializeQueueManager(QueueManager $qm)
{
// Prepare outgoing distributions after notice save.
$qm->connect('ostatus', 'OStatusQueueHandler');
// Outgoing from our internal PuSH hub
$qm->connect('hubconf', 'HubConfQueueHandler');
$qm->connect('hubout', 'HubOutQueueHandler');
// Outgoing Salmon replies (when we don't need a return value)
$qm->connect('salmon', 'SalmonQueueHandler');
// Incoming from a foreign PuSH hub
$qm->connect('pushin', 'PushInQueueHandler');
return true;
}
/**
* Put saved notices into the queue for pubsub distribution.
*/
function onStartEnqueueNotice($notice, &$transports)
{
// put our transport first, in case there's any conflict (like OMB)
array_unshift($transports, 'ostatus');
return true;
}
/**
* Add a link header for LRDD Discovery
*/
function onStartShowHTML($action)
{
if ($action instanceof ShowstreamAction) {
$acct = 'acct:'. $action->profile->nickname .'@'. common_config('site', 'server');
$url = common_local_url('userxrd');
$url.= '?uri='. $acct;
header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="application/xrd+xml"');
}
}
/**
* Set up a PuSH hub link to our internal link for canonical timeline
* Atom feeds for users and groups.
*/
function onStartApiAtom($feed)
{
$id = null;
if ($feed instanceof AtomUserNoticeFeed) {
$salmonAction = 'usersalmon';
$user = $feed->getUser();
$id = $user->id;
$profile = $user->getProfile();
$feed->setActivitySubject($profile->asActivityNoun('subject'));
} else if ($feed instanceof AtomGroupNoticeFeed) {
$salmonAction = 'groupsalmon';
$group = $feed->getGroup();
$id = $group->id;
$feed->setActivitySubject($group->asActivitySubject());
} else {
return true;
}
if (!empty($id)) {
$hub = common_config('ostatus', 'hub');
if (empty($hub)) {
// Updates will be handled through our internal PuSH hub.
$hub = common_local_url('pushhub');
}
$feed->addLink($hub, array('rel' => 'hub'));
// Also, we'll add in the salmon link
$salmon = common_local_url($salmonAction, array('id' => $id));
$feed->addLink($salmon, array('rel' => Salmon::NS_REPLIES));
$feed->addLink($salmon, array('rel' => Salmon::NS_MENTIONS));
}
return true;
}
/**
* Automatically load the actions and libraries used by the plugin
*
* @param Class $cls the class
*
* @return boolean hook return
*
*/
function onAutoload($cls)
{
$base = dirname(__FILE__);
$lower = strtolower($cls);
$map = array('activityverb' => 'activity',
'activityobject' => 'activity',
'activityutils' => 'activity');
if (isset($map[$lower])) {
$lower = $map[$lower];
}
$files = array("$base/classes/$cls.php",
"$base/lib/$lower.php");
if (substr($lower, -6) == 'action') {
$files[] = "$base/actions/" . substr($lower, 0, -6) . ".php";
}
foreach ($files as $file) {
if (file_exists($file)) {
include_once $file;
return false;
}
}
return true;
}
/**
* Add in an OStatus subscribe button
*/
function onStartProfileRemoteSubscribe($output, $profile)
{
$cur = common_current_user();
if (empty($cur)) {
// Add an OStatus subscribe
$output->elementStart('li', 'entity_subscribe');
$url = common_local_url('ostatusinit',
array('nickname' => $profile->nickname));
$output->element('a', array('href' => $url,
'class' => 'entity_remote_subscribe'),
_m('Subscribe'));
$output->elementEnd('li');
}
return false;
}
function onStartGroupSubscribe($output, $group)
{
$cur = common_current_user();
if (empty($cur)) {
// Add an OStatus subscribe
$url = common_local_url('ostatusinit',
array('group' => $group->nickname));
$output->element('a', array('href' => $url,
'class' => 'entity_remote_subscribe'),
_m('Join'));
}
return true;
}
/**
* Check if we've got remote replies to send via Salmon.
*
* @fixme push webfinger lookup & sending to a background queue
* @fixme also detect short-form name for remote subscribees where not ambiguous
*/
function onEndNoticeSave($notice)
{
}
/**
* Find any explicit remote mentions. Accepted forms:
* Webfinger: @user@example.com
* Profile link: @example.com/mublog/user
* @param Profile $sender (os user?)
* @param string $text input markup text
* @param array &$mention in/out param: set of found mentions
* @return boolean hook return value
*/
function onEndFindMentions($sender, $text, &$mentions)
{
$matches = array();
// Webfinger matches: @user@example.com
if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\-?\w+\.)*\w+(?:\w+\-\w+)*\.\w+)!',
$text,
$wmatches,
PREG_OFFSET_CAPTURE)) {
foreach ($wmatches[1] as $wmatch) {
list($target, $pos) = $wmatch;
$this->log(LOG_INFO, "Checking webfinger '$target'");
try {
$oprofile = Ostatus_profile::ensureWebfinger($target);
if ($oprofile && !$oprofile->isGroup()) {
$profile = $oprofile->localProfile();
$matches[$pos] = array('mentioned' => array($profile),
'text' => $target,
'position' => $pos,
'url' => $profile->profileurl);
}
} catch (Exception $e) {
$this->log(LOG_ERR, "Webfinger check failed: " . $e->getMessage());
}
}
}
// Profile matches: @example.com/mublog/user
if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)!',
$text,
$wmatches,
PREG_OFFSET_CAPTURE)) {
foreach ($wmatches[1] as $wmatch) {
list($target, $pos) = $wmatch;
$schemes = array('http', 'https');
foreach ($schemes as $scheme) {
$url = "$scheme://$target";
$this->log(LOG_INFO, "Checking profile address '$url'");
try {
$oprofile = Ostatus_profile::ensureProfileURL($url);
if ($oprofile && !$oprofile->isGroup()) {
$profile = $oprofile->localProfile();
$matches[$pos] = array('mentioned' => array($profile),
'text' => $target,
'position' => $pos,
'url' => $profile->profileurl);
break;
}
} catch (Exception $e) {
$this->log(LOG_ERR, "Profile check failed: " . $e->getMessage());
}
}
}
}
foreach ($mentions as $i => $other) {
// If we share a common prefix with a local user, override it!
$pos = $other['position'];
if (isset($matches[$pos])) {
$mentions[$i] = $matches[$pos];
unset($matches[$pos]);
}
}
foreach ($matches as $mention) {
$mentions[] = $mention;
}
return true;
}
/**
* Allow remote profile references to be used in commands:
* sub update@status.net
* whois evan@identi.ca
* reply http://identi.ca/evan hey what's up
*
* @param Command $command
* @param string $arg
* @param Profile &$profile
* @return hook return code
*/
function onStartCommandGetProfile($command, $arg, &$profile)
{
$oprofile = $this->pullRemoteProfile($arg);
if ($oprofile && !$oprofile->isGroup()) {
$profile = $oprofile->localProfile();
return false;
} else {
return true;
}
}
/**
* Allow remote group references to be used in commands:
* join group+statusnet@identi.ca
* join http://identi.ca/group/statusnet
* drop identi.ca/group/statusnet
*
* @param Command $command
* @param string $arg
* @param User_group &$group
* @return hook return code
*/
function onStartCommandGetGroup($command, $arg, &$group)
{
$oprofile = $this->pullRemoteProfile($arg);
if ($oprofile && $oprofile->isGroup()) {
$group = $oprofile->localGroup();
return false;
} else {
return true;
}
}
protected function pullRemoteProfile($arg)
{
$oprofile = null;
if (preg_match('!^((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)$!', $arg)) {
// webfinger lookup
try {
return Ostatus_profile::ensureWebfinger($arg);
} catch (Exception $e) {
common_log(LOG_ERR, 'Webfinger lookup failed for ' .
$arg . ': ' . $e->getMessage());
}
}
// Look for profile URLs, with or without scheme:
$urls = array();
if (preg_match('!^https?://((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)$!', $arg)) {
$urls[] = $arg;
}
if (preg_match('!^((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)$!', $arg)) {
$schemes = array('http', 'https');
foreach ($schemes as $scheme) {
$urls[] = "$scheme://$arg";
}
}
foreach ($urls as $url) {
try {
return Ostatus_profile::ensureProfileURL($url);
} catch (Exception $e) {
common_log(LOG_ERR, 'Profile lookup failed for ' .
$arg . ': ' . $e->getMessage());
}
}
return null;
}
/**
* Make sure necessary tables are filled out.
*/
function onCheckSchema() {
$schema = Schema::get();
$schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
$schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
$schema->ensureTable('feedsub', FeedSub::schemaDef());
$schema->ensureTable('hubsub', HubSub::schemaDef());
$schema->ensureTable('magicsig', Magicsig::schemaDef());
return true;
}
function onEndShowStatusNetStyles($action) {
$action->cssLink('plugins/OStatus/theme/base/css/ostatus.css');
return true;
}
function onEndShowStatusNetScripts($action) {
$action->script('plugins/OStatus/js/ostatus.js');
return true;
}
/**
* Override the "from ostatus" bit in notice lists to link to the
* original post and show the domain it came from.
*
* @param Notice in $notice
* @param string out &$name
* @param string out &$url
* @param string out &$title
* @return mixed hook return code
*/
function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
{
if ($notice->source == 'ostatus') {
if ($notice->url) {
$bits = parse_url($notice->url);
$domain = $bits['host'];
if (substr($domain, 0, 4) == 'www.') {
$name = substr($domain, 4);
} else {
$name = $domain;
}
$url = $notice->url;
$title = sprintf(_m("Sent from %s via OStatus"), $domain);
return false;
}
}
}
/**
* Send incoming PuSH feeds for OStatus endpoints in for processing.
*
* @param FeedSub $feedsub
* @param DOMDocument $feed
* @return mixed hook return code
*/
function onStartFeedSubReceive($feedsub, $feed)
{
$oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
if ($oprofile) {
$oprofile->processFeed($feed, 'push');
} else {
common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
}
}
/**
* When about to subscribe to a remote user, start a server-to-server
* PuSH subscription if needed. If we can't establish that, abort.
*
* @fixme If something else aborts later, we could end up with a stray
* PuSH subscription. This is relatively harmless, though.
*
* @param Profile $subscriber
* @param Profile $other
*
* @return hook return code
*
* @throws Exception
*/
function onStartSubscribe($subscriber, $other)
{
$user = User::staticGet('id', $subscriber->id);
if (empty($user)) {
return true;
}
$oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
if (empty($oprofile)) {
return true;
}
if (!$oprofile->subscribe()) {
throw new Exception(_m('Could not set up remote subscription.'));
}
}
/**
* Having established a remote subscription, send a notification to the
* remote OStatus profile's endpoint.
*
* @param Profile $subscriber
* @param Profile $other
*
* @return hook return code
*
* @throws Exception
*/
function onEndSubscribe($subscriber, $other)
{
$user = User::staticGet('id', $subscriber->id);
if (empty($user)) {
return true;
}
$oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
if (empty($oprofile)) {
return true;
}
$act = new Activity();
$act->verb = ActivityVerb::FOLLOW;
$act->id = TagURI::mint('follow:%d:%d:%s',
$subscriber->id,
$other->id,
common_date_iso8601(time()));
$act->time = time();
$act->title = _("Follow");
$act->content = sprintf(_("%s is now following %s."),
$subscriber->getBestName(),
$other->getBestName());
$act->actor = ActivityObject::fromProfile($subscriber);
$act->object = ActivityObject::fromProfile($other);
$oprofile->notifyActivity($act, $subscriber);
return true;
}
/**
* Notify remote server and garbage collect unused feeds on unsubscribe.
* @fixme send these operations to background queues
*
* @param User $user
* @param Profile $other
* @return hook return value
*/
function onEndUnsubscribe($profile, $other)
{
$user = User::staticGet('id', $profile->id);
if (empty($user)) {
return true;
}
$oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
if (empty($oprofile)) {
return true;
}
// Drop the PuSH subscription if there are no other subscribers.
$oprofile->garbageCollect();
$act = new Activity();
$act->verb = ActivityVerb::UNFOLLOW;
$act->id = TagURI::mint('unfollow:%d:%d:%s',
$profile->id,
$other->id,
common_date_iso8601(time()));
$act->time = time();
$act->title = _("Unfollow");
$act->content = sprintf(_("%s stopped following %s."),
$profile->getBestName(),
$other->getBestName());
$act->actor = ActivityObject::fromProfile($profile);
$act->object = ActivityObject::fromProfile($other);
$oprofile->notifyActivity($act, $profile);
return true;
}
/**
* When one of our local users tries to join a remote group,
* notify the remote server. If the notification is rejected,
* deny the join.
*
* @param User_group $group
* @param User $user
*
* @return mixed hook return value
*/
function onStartJoinGroup($group, $user)
{
$oprofile = Ostatus_profile::staticGet('group_id', $group->id);
if ($oprofile) {
if (!$oprofile->subscribe()) {
throw new Exception(_m('Could not set up remote group membership.'));
}
$member = Profile::staticGet($user->id);
$act = new Activity();
$act->id = TagURI::mint('join:%d:%d:%s',
$member->id,
$group->id,
common_date_iso8601(time()));
$act->actor = ActivityObject::fromProfile($member);
$act->verb = ActivityVerb::JOIN;
$act->object = $oprofile->asActivityObject();
$act->time = time();
$act->title = _m("Join");
$act->content = sprintf(_m("%s has joined group %s."),
$member->getBestName(),
$oprofile->getBestName());
if ($oprofile->notifyActivity($act, $member)) {
return true;
} else {
$oprofile->garbageCollect();
throw new Exception(_m("Failed joining remote group."));
}
}
}
/**
* When one of our local users leaves a remote group, notify the remote
* server.
*
* @fixme Might be good to schedule a resend of the leave notification
* if it failed due to a transitory error. We've canceled the local
* membership already anyway, but if the remote server comes back up
* it'll be left with a stray membership record.
*
* @param User_group $group
* @param User $user
*
* @return mixed hook return value
*/
function onEndLeaveGroup($group, $user)
{
$oprofile = Ostatus_profile::staticGet('group_id', $group->id);
if ($oprofile) {
// Drop the PuSH subscription if there are no other subscribers.
$oprofile->garbageCollect();
$member = Profile::staticGet($user->id);
$act = new Activity();
$act->id = TagURI::mint('leave:%d:%d:%s',
$member->id,
$group->id,
common_date_iso8601(time()));
$act->actor = ActivityObject::fromProfile($member);
$act->verb = ActivityVerb::LEAVE;
$act->object = $oprofile->asActivityObject();
$act->time = time();
$act->title = _m("Leave");
$act->content = sprintf(_m("%s has left group %s."),
$member->getBestName(),
$oprofile->getBestName());
$oprofile->notifyActivity($act, $member);
}
}
/**
* Notify remote users when their notices get favorited.
*
* @param Profile or User $profile of local user doing the faving
* @param Notice $notice being favored
* @return hook return value
*/
function onEndFavorNotice(Profile $profile, Notice $notice)
{
$user = User::staticGet('id', $profile->id);
if (empty($user)) {
return true;
}
$oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
if (empty($oprofile)) {
return true;
}
$act = new Activity();
$act->verb = ActivityVerb::FAVORITE;
$act->id = TagURI::mint('favor:%d:%d:%s',
$profile->id,
$notice->id,
common_date_iso8601(time()));
$act->time = time();
$act->title = _("Favor");
$act->content = sprintf(_("%s marked notice %s as a favorite."),
$profile->getBestName(),
$notice->uri);
$act->actor = ActivityObject::fromProfile($profile);
$act->object = ActivityObject::fromNotice($notice);
$oprofile->notifyActivity($act, $profile);
return true;
}
/**
* Notify remote users when their notices get de-favorited.
*
* @param Profile $profile Profile person doing the de-faving
* @param Notice $notice Notice being favored
*
* @return hook return value
*/
function onEndDisfavorNotice(Profile $profile, Notice $notice)
{
$user = User::staticGet('id', $profile->id);
if (empty($user)) {
return true;
}
$oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
if (empty($oprofile)) {
return true;
}
$act = new Activity();
$act->verb = ActivityVerb::UNFAVORITE;
$act->id = TagURI::mint('disfavor:%d:%d:%s',
$profile->id,
$notice->id,
common_date_iso8601(time()));
$act->time = time();
$act->title = _("Disfavor");
$act->content = sprintf(_("%s marked notice %s as no longer a favorite."),
$profile->getBestName(),
$notice->uri);
$act->actor = ActivityObject::fromProfile($profile);
$act->object = ActivityObject::fromNotice($notice);
$oprofile->notifyActivity($act, $profile);
return true;
}
function onStartGetProfileUri($profile, &$uri)
{
$oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
if (!empty($oprofile)) {
$uri = $oprofile->uri;
return false;
}
return true;
}
function onStartUserGroupHomeUrl($group, &$url)
{
return $this->onStartUserGroupPermalink($group, $url);
}
function onStartUserGroupPermalink($group, &$url)
{
$oprofile = Ostatus_profile::staticGet('group_id', $group->id);
if ($oprofile) {
// @fixme this should probably be in the user_group table
// @fixme this uri not guaranteed to be a profile page
$url = $oprofile->uri;
return false;
}
}
function onStartShowSubscriptionsContent($action)
{
$this->showEntityRemoteSubscribe($action);
return true;
}
function onStartShowUserGroupsContent($action)
{
$this->showEntityRemoteSubscribe($action, 'ostatusgroup');
return true;
}
function onEndShowSubscriptionsMiniList($action)
{
$this->showEntityRemoteSubscribe($action);
return true;
}
function onEndShowGroupsMiniList($action)
{
$this->showEntityRemoteSubscribe($action, 'ostatusgroup');
return true;
}
function showEntityRemoteSubscribe($action, $target='ostatussub')
{
$user = common_current_user();
if ($user && ($user->id == $action->profile->id)) {
$action->elementStart('div', 'entity_actions');
$action->elementStart('p', array('id' => 'entity_remote_subscribe',
'class' => 'entity_subscribe'));
$action->element('a', array('href' => common_local_url($target),
'class' => 'entity_remote_subscribe')
, _m('Remote'));
$action->elementEnd('p');
$action->elementEnd('div');
}
}
/**
* Ping remote profiles with updates to this profile.
* Salmon pings are queued for background processing.
*/
function onEndBroadcastProfile(Profile $profile)
{
$user = User::staticGet('id', $profile->id);
// Find foreign accounts I'm subscribed to that support Salmon pings.
//
// @fixme we could run updates through the PuSH feed too,
// in which case we can skip Salmon pings to folks who
// are also subscribed to me.
$sql = "SELECT * FROM ostatus_profile " .
"WHERE profile_id IN " .
"(SELECT subscribed FROM subscription WHERE subscriber=%d) " .
"OR group_id IN " .
"(SELECT group_id FROM group_member WHERE profile_id=%d)";
$oprofile = new Ostatus_profile();
$oprofile->query(sprintf($sql, $profile->id, $profile->id));
if ($oprofile->N == 0) {
common_log(LOG_DEBUG, "No OStatus remote subscribees for $profile->nickname");
return true;
}
$act = new Activity();
$act->verb = ActivityVerb::UPDATE_PROFILE;
$act->id = TagURI::mint('update-profile:%d:%s',
$profile->id,
common_date_iso8601(time()));
$act->time = time();
$act->title = _m("Profile update");
$act->content = sprintf(_m("%s has updated their profile page."),
$profile->getBestName());
$act->actor = ActivityObject::fromProfile($profile);
$act->object = $act->actor;
while ($oprofile->fetch()) {
$oprofile->notifyDeferred($act, $profile);
}
return true;
}
function onStartProfileListItemActionElements($item)
{
if (!common_logged_in()) {
$profileUser = User::staticGet('id', $item->profile->id);
if (!empty($profileUser)) {
$output = $item->out;
// Add an OStatus subscribe
$output->elementStart('li', 'entity_subscribe');
$url = common_local_url('ostatusinit',
array('nickname' => $profileUser->nickname));
$output->element('a', array('href' => $url,
'class' => 'entity_remote_subscribe'),
_m('Subscribe'));
$output->elementEnd('li');
}
}
return true;
}
function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'OStatus',
'version' => STATUSNET_VERSION,
'author' => 'Evan Prodromou, James Walker, Brion Vibber, Zach Copley',
'homepage' => 'http://status.net/wiki/Plugin:OStatus',
'rawdescription' =>
_m('Follow people across social networks that implement '.
'<a href="http://ostatus.org/">OStatus</a>.'));
return true;
}
/**
* Utility function to check if the given URL is a canonical group profile
* page, and if so return the ID number.
*
* @param string $url
* @return mixed int or false
*/
public static function localGroupFromUrl($url)
{
$template = common_local_url('groupbyid', array('id' => '31337'));
$template = preg_quote($template, '/');
$template = str_replace('31337', '(\d+)', $template);
if (preg_match("/$template/", $url, $matches)) {
return intval($matches[1]);
}
return false;
}
}
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