gnu-social/lib/implugin.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Superclass for plugins that do instant messaging
*
* PHP version 5
*
* LICENCE: 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/>.
*
* @category Plugin
* @package StatusNet
* @author Craig Andrews <candrews@integralblue.com>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET') && !defined('LACONICA')) {
exit(1);
}
/**
* Superclass for plugins that do authentication
*
* Implementations will likely want to override onStartIoManagerClasses() so that their
* IO manager is used
*
* @category Plugin
* @package StatusNet
* @author Craig Andrews <candrews@integralblue.com>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
abstract class ImPlugin extends Plugin
{
//name of this IM transport
public $transport = null;
//list of screennames that should get all public notices
public $public = array();
/**
* normalize a screenname for comparison
*
* @param string $screenname screenname to normalize
*
* @return string an equivalent screenname in normalized form
*/
abstract function normalize($screenname);
/**
* validate (ensure the validity of) a screenname
*
* @param string $screenname screenname to validate
*
* @return boolean
*/
abstract function validate($screenname);
/**
* get the internationalized/translated display name of this IM service
*
* @return string
*/
abstract function getDisplayName();
/**
* send a single notice to a given screenname
* The implementation should put raw data, ready to send, into the outgoing
* queue using enqueueOutgoingRaw()
*
* @param string $screenname screenname to send to
* @param Notice $notice notice to send
*
* @return boolean success value
*/
function sendNotice($screenname, Notice $notice)
{
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return $this->sendMessage($screenname, $this->formatNotice($notice));
}
/**
* send a message (text) to a given screenname
* The implementation should put raw data, ready to send, into the outgoing
* queue using enqueueOutgoingRaw()
*
* @param string $screenname screenname to send to
* @param Notice $body text to send
*
* @return boolean success value
*/
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abstract function sendMessage($screenname, $body);
/**
* receive a raw message
* Raw IM data is taken from the incoming queue, and passed to this function.
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* It should parse the raw message and call handleIncoming()
*
* Returning false may CAUSE REPROCESSING OF THE QUEUE ITEM, and should
* be used for temporary failures only. For permanent failures such as
* unrecognized addresses, return true to indicate your processing has
* completed.
*
* @param object $data raw IM data
*
* @return boolean true if processing completed, false for temporary failures
*/
abstract function receiveRawMessage($data);
/**
* get the screenname of the daemon that sends and receives message for this service
*
* @return string screenname of this plugin
*/
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abstract function daemonScreenname();
/**
* get the microid uri of a given screenname
*
* @param string $screenname screenname
*
* @return string microid uri
*/
function microiduri($screenname)
{
return $this->transport . ':' . $screenname;
}
//========================UTILITY FUNCTIONS USEFUL TO IMPLEMENTATIONS - MISC ========================\
/**
* Put raw message data (ready to send) into the outgoing queue
*
* @param object $data
*/
function enqueueOutgoingRaw($data)
{
$qm = QueueManager::get();
$qm->enqueue($data, $this->transport . '-out');
}
/**
* Put raw message data (received, ready to be processed) into the incoming queue
*
* @param object $data
*/
function enqueueIncomingRaw($data)
{
$qm = QueueManager::get();
$qm->enqueue($data, $this->transport . '-in');
}
/**
* given a screenname, get the corresponding user
*
* @param string $screenname
*
* @return User user
*/
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function getUser($screenname)
{
$user_im_prefs = $this->getUserImPrefsFromScreenname($screenname);
if($user_im_prefs){
$user = User::getKV('id', $user_im_prefs->user_id);
$user_im_prefs->free();
return $user;
}else{
return false;
}
}
/**
* given a screenname, get the User_im_prefs object for this transport
*
* @param string $screenname
*
* @return User_im_prefs user_im_prefs
*/
function getUserImPrefsFromScreenname($screenname)
{
$user_im_prefs = User_im_prefs::pkeyGet(
array('transport' => $this->transport,
'screenname' => $this->normalize($screenname)));
if ($user_im_prefs) {
return $user_im_prefs;
} else {
return false;
}
}
/**
* given a User, get their screenname
*
* @param User $user
*
* @return string screenname of that user
*/
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function getScreenname($user)
{
$user_im_prefs = $this->getUserImPrefsFromUser($user);
if ($user_im_prefs) {
return $user_im_prefs->screenname;
} else {
return false;
}
}
/**
* given a User, get their User_im_prefs
*
* @param User $user
*
* @return User_im_prefs user_im_prefs of that user
*/
function getUserImPrefsFromUser($user)
{
$user_im_prefs = User_im_prefs::pkeyGet(
array('transport' => $this->transport,
'user_id' => $user->id));
if ($user_im_prefs){
return $user_im_prefs;
} else {
return false;
}
}
//========================UTILITY FUNCTIONS USEFUL TO IMPLEMENTATIONS - SENDING ========================\
/**
* Send a message to a given screenname from the site
*
* @param string $screenname screenname to send the message to
* @param string $msg message contents to send
*
* @param boolean success
*/
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protected function sendFromSite($screenname, $msg)
{
$text = '['.common_config('site', 'name') . '] ' . $msg;
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$this->sendMessage($screenname, $text);
}
/**
* Send a confirmation code to a user
*
* @param string $screenname screenname sending to
* @param string $code the confirmation code
* @param User $user user sending to
*
* @return boolean success value
*/
function sendConfirmationCode($screenname, $code, $user)
{
// TRANS: Body text for confirmation code e-mail.
// TRANS: %1$s is a user nickname, %2$s is the StatusNet sitename,
// TRANS: %3$s is the display name of an IM plugin.
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$body = sprintf(_('User "%1$s" on %2$s has said that your %3$s screenname belongs to them. ' .
'If that is true, you can confirm by clicking on this URL: ' .
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'%4$s' .
' . (If you cannot click it, copy-and-paste it into the ' .
'address bar of your browser). If that user is not you, ' .
'or if you did not request this confirmation, just ignore this message.'),
$user->nickname, common_config('site', 'name'), $this->getDisplayName(), common_local_url('confirmaddress', null, array('code' => $code)));
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return $this->sendMessage($screenname, $body);
}
/**
* send a notice to all public listeners
*
* For notices that are generated on the local system (by users), we can optionally
* forward them to remote listeners by XMPP.
*
* @param Notice $notice notice to broadcast
*
* @return boolean success flag
*/
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function publicNotice($notice)
{
// Now, users who want everything
// FIXME PRIV don't send out private messages here
// XXX: should we send out non-local messages if public,localonly
// = false? I think not
foreach ($this->public as $screenname) {
common_log(LOG_INFO,
'Sending notice ' . $notice->id .
' to public listener ' . $screenname,
__FILE__);
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$this->sendNotice($screenname, $notice);
}
return true;
}
/**
* broadcast a notice to all subscribers and reply recipients
*
* This function will send a notice to all subscribers on the local server
* who have IM addresses, and have IM notification enabled, and
* have this subscription enabled for IM. It also sends the notice to
* all recipients of @-replies who have IM addresses and IM notification
* enabled. This is really the heart of IM distribution in StatusNet.
*
* @param Notice $notice The notice to broadcast
*
* @return boolean success flag
*/
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function broadcastNotice($notice)
{
$ni = $notice->whoGets();
foreach ($ni as $user_id => $reason) {
$user = User::getKV($user_id);
if (empty($user)) {
// either not a local user, or just not found
continue;
}
$user_im_prefs = $this->getUserImPrefsFromUser($user);
if(!$user_im_prefs || !$user_im_prefs->notify){
continue;
}
switch ($reason) {
case NOTICE_INBOX_SOURCE_REPLY:
if (!$user_im_prefs->replies) {
continue 2;
}
break;
case NOTICE_INBOX_SOURCE_SUB:
$sub = Subscription::pkeyGet(array('subscriber' => $user->id,
'subscribed' => $notice->profile_id));
if (empty($sub) || !$sub->jabber) {
continue 2;
}
break;
case NOTICE_INBOX_SOURCE_GROUP:
break;
default:
// TRANS: Exception thrown when trying to deliver a notice to an unknown inbox.
// TRANS: %d is the unknown inbox ID (number).
throw new Exception(sprintf(_('Unknown inbox source %d.'), $reason));
}
common_log(LOG_INFO,
'Sending notice ' . $notice->id . ' to ' . $user_im_prefs->screenname,
__FILE__);
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$this->sendNotice($user_im_prefs->screenname, $notice);
$user_im_prefs->free();
}
return true;
}
/**
* makes a plain-text formatted version of a notice, suitable for IM distribution
*
* @param Notice $notice notice being sent
*
* @return string plain-text version of the notice, with user nickname prefixed
*/
protected function formatNotice(Notice $notice)
{
$profile = $notice->getProfile();
try {
$orig_profile = $notice->getParent()->getProfile();
$nicknames = sprintf('%1$s => %2$s', $profile->nickname, $orig_profile->nickname);
} catch (Exception $e) {
$nicknames = $profile->nickname;
}
return sprintf('%1$s: %2$s [%3$u]', $nicknames, $notice->content, $notice->id);
}
//========================UTILITY FUNCTIONS USEFUL TO IMPLEMENTATIONS - RECEIVING ========================\
/**
* Attempt to handle a message as a command
* @param User $user user the message is from
* @param string $body message text
* @return boolean true if the message was a command and was executed, false if it was not a command
*/
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protected function handleCommand($user, $body)
{
$inter = new CommandInterpreter();
$cmd = $inter->handle_command($user, $body);
if ($cmd) {
$chan = new IMChannel($this);
$cmd->execute($chan);
return true;
} else {
return false;
}
}
/**
* Is some text an autoreply message?
* @param string $txt message text
* @return boolean true if autoreply
*/
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protected function isAutoreply($txt)
{
if (preg_match('/[\[\(]?[Aa]uto[-\s]?[Rr]e(ply|sponse)[\]\)]/', $txt)) {
return true;
} else if (preg_match('/^System: Message wasn\'t delivered. Offline storage size was exceeded.$/', $txt)) {
return true;
} else {
return false;
}
}
/**
* Is some text an OTR message?
* @param string $txt message text
* @return boolean true if OTR
*/
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protected function isOtr($txt)
{
if (preg_match('/^\?OTR/', $txt)) {
return true;
} else {
return false;
}
}
/**
* Helper for handling incoming messages
* Your incoming message handler will probably want to call this function
*
* @param string $from screenname the message was sent from
* @param string $message message contents
*
* @param boolean success
*/
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protected function handleIncoming($from, $notice_text)
{
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$user = $this->getUser($from);
// For common_current_user to work
global $_cur;
$_cur = $user;
if (!$user) {
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$this->sendFromSite($from, 'Unknown user; go to ' .
common_local_url('imsettings') .
' to add your address to your account');
common_log(LOG_WARNING, 'Message from unknown user ' . $from);
return;
}
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if ($this->handleCommand($user, $notice_text)) {
common_log(LOG_INFO, "Command message by $from handled.");
return;
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} else if ($this->isAutoreply($notice_text)) {
common_log(LOG_INFO, 'Ignoring auto reply from ' . $from);
return;
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} else if ($this->isOtr($notice_text)) {
common_log(LOG_INFO, 'Ignoring OTR from ' . $from);
return;
} else {
common_log(LOG_INFO, 'Posting a notice from ' . $user->nickname);
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$this->addNotice($from, $user, $notice_text);
}
$user->free();
unset($user);
unset($_cur);
unset($message);
}
/**
* Helper for handling incoming messages
* Your incoming message handler will probably want to call this function
*
* @param string $from screenname the message was sent from
* @param string $message message contents
*
* @param boolean success
*/
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protected function addNotice($screenname, $user, $body)
{
$body = trim(strip_tags($body));
$content_shortened = common_shorten_links($body);
if (Notice::contentTooLong($content_shortened)) {
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$this->sendFromSite($screenname,
// TRANS: Message given when a status is too long. %1$s is the maximum number of characters,
// TRANS: %2$s is the number of characters sent (used for plural).
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sprintf(_m('Message too long - maximum is %1$d character, you sent %2$d.',
'Message too long - maximum is %1$d characters, you sent %2$d.',
Notice::maxContent()),
Notice::maxContent(),
mb_strlen($content_shortened)));
return;
}
try {
$notice = Notice::saveNew($user->id, $content_shortened, $this->transport);
} catch (Exception $e) {
common_log(LOG_ERR, $e->getMessage());
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$this->sendFromSite($from, $e->getMessage());
return;
}
common_log(LOG_INFO,
'Added notice ' . $notice->id . ' from user ' . $user->nickname);
$notice->free();
unset($notice);
}
//========================EVENT HANDLERS========================\
/**
* Register notice queue handler
*
* @param QueueManager $manager
*
* @return boolean hook return
*/
function onEndInitializeQueueManager($manager)
{
$manager->connect($this->transport . '-in', new ImReceiverQueueHandler($this), 'im');
$manager->connect($this->transport, new ImQueueHandler($this));
$manager->connect($this->transport . '-out', new ImSenderQueueHandler($this), 'im');
return true;
}
function onStartImDaemonIoManagers(&$classes)
{
//$classes[] = new ImManager($this); // handles sending/receiving/pings/reconnects
return true;
}
function onStartEnqueueNotice($notice, &$transports)
{
$profile = Profile::getKV($notice->profile_id);
if (!$profile) {
common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
'unknown profile ' . common_log_objstring($notice),
__FILE__);
}else{
$transports[] = $this->transport;
}
return true;
}
function onEndShowHeadElements($action)
{
$aname = $action->trimmed('action');
if ($aname == 'shownotice') {
$user_im_prefs = new User_im_prefs();
$user_im_prefs->user_id = $action->profile->id;
$user_im_prefs->transport = $this->transport;
if ($user_im_prefs->find() && $user_im_prefs->fetch() && $user_im_prefs->microid && $action->notice->uri) {
$id = new Microid($this->microiduri($user_im_prefs->screenname),
$action->notice->uri);
$action->element('meta', array('name' => 'microid',
'content' => $id->toString()));
}
} else if ($aname == 'showstream') {
$user_im_prefs = new User_im_prefs();
$user_im_prefs->user_id = $action->user->id;
$user_im_prefs->transport = $this->transport;
if ($user_im_prefs->find() && $user_im_prefs->fetch() && $user_im_prefs->microid && $action->profile->profileurl) {
$id = new Microid($this->microiduri($user_im_prefs->screenname),
$action->selfUrl());
$action->element('meta', array('name' => 'microid',
'content' => $id->toString()));
}
}
}
function onNormalizeImScreenname($transport, &$screenname)
{
if($transport == $this->transport)
{
$screenname = $this->normalize($screenname);
return false;
}
}
function onValidateImScreenname($transport, $screenname, &$valid)
{
if($transport == $this->transport)
{
$valid = $this->validate($screenname);
return false;
}
}
function onGetImTransports(&$transports)
{
$transports[$this->transport] = array(
'display' => $this->getDisplayName(),
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'daemonScreenname' => $this->daemonScreenname());
}
function onSendImConfirmationCode($transport, $screenname, $code, $user)
{
if($transport == $this->transport)
{
$this->sendConfirmationCode($screenname, $code, $user);
return false;
}
}
function onUserDeleteRelated($user, &$tables)
{
$tables[] = 'User_im_prefs';
return true;
}
function onHaveImPlugin(&$haveImPlugin) {
$haveImPlugin = true; // set flag true (we're loaded, after all!)
return false; // stop looking
}
function initialize()
{
if( ! common_config('queue', 'enabled'))
{
// TRANS: Server exception thrown trying to initialise an IM plugin without meeting all prerequisites.
throw new ServerException(_('Queueing must be enabled to use IM plugins.'));
}
if(is_null($this->transport)){
// TRANS: Server exception thrown trying to initialise an IM plugin without a transport method.
throw new ServerException(_('Transport cannot be null.'));
}
}
}