gnu-social/plugins/Irc/extlib/phergie/Phergie/Driver/Streams.php

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<?php
/**
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* Phergie
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*
* PHP version 5
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.
* It is also available through the world-wide-web at this URL:
* http://phergie.org/license
*
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* @category Phergie
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* @package Phergie
* @author Phergie Development Team <team@phergie.org>
* @copyright 2008-2010 Phergie Development Team (http://phergie.org)
* @license http://phergie.org/license New BSD License
* @link http://pear.phergie.org/package/Phergie
*/
/**
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* Driver that uses the sockets wrapper of the streams extension for
* communicating with the server and handles formatting and parsing of
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* events using PHP.
*
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* @category Phergie
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* @package Phergie
* @author Phergie Development Team <team@phergie.org>
* @license http://phergie.org/license New BSD License
* @link http://pear.phergie.org/package/Phergie
*/
class Phergie_Driver_Streams extends Phergie_Driver_Abstract
{
/**
* Socket handlers
*
* @var array
*/
protected $sockets = array();
/**
* Reference to the currently active socket handler
*
* @var resource
*/
protected $socket;
/**
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* Amount of time in seconds to wait to receive an event each time the
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* socket is polled
*
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* @var float
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*/
protected $timeout = 0.1;
/**
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* Handles construction of command strings and their transmission to the
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* server.
*
* @param string $command Command to send
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* @param string|array $args Optional string or array of sequential
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* arguments
*
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* @return string Command string that was sent
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* @throws Phergie_Driver_Exception
*/
protected function send($command, $args = '')
{
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$connection = $this->getConnection();
$encoding = $connection->getEncoding();
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// Require an open socket connection to continue
if (empty($this->socket)) {
throw new Phergie_Driver_Exception(
'doConnect() must be called first',
Phergie_Driver_Exception::ERR_NO_INITIATED_CONNECTION
);
}
// Add the command
$buffer = strtoupper($command);
// Add arguments
if (!empty($args)) {
// Apply formatting if arguments are passed in as an array
if (is_array($args)) {
$end = count($args) - 1;
$args[$end] = ':' . $args[$end];
$args = implode(' ', $args);
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} else {
$args = ':' . $args;
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}
$buffer .= ' ' . $args;
}
// Transmit the command over the socket connection
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$attempts = $written = 0;
$temp = $buffer . "\r\n";
$is_multibyte = !substr($encoding, 0, 8) === 'ISO-8859' && $encoding !== 'ASCII' && $encoding !== 'CP1252';
$length = ($is_multibyte) ? mb_strlen($buffer, '8bit') : strlen($buffer);
while (true) {
$written += (int) fwrite($this->socket, $temp);
if ($written < $length) {
$temp = substr($temp, $written);
$attempts++;
if ($attempts == 3) {
throw new Phergie_Driver_Exception(
'Unable to write to socket',
Phergie_Driver_Exception::ERR_CONNECTION_WRITE_FAILED
);
}
} else {
break;
}
}
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// Return the command string that was transmitted
return $buffer;
}
/**
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* Overrides the parent class to set the currently active socket handler
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* when the active connection is changed.
*
* @param Phergie_Connection $connection Active connection
*
* @return Phergie_Driver_Streams Provides a fluent interface
*/
public function setConnection(Phergie_Connection $connection)
{
// Set the active socket handler
$hostmask = (string) $connection->getHostmask();
if (!empty($this->sockets[$hostmask])) {
$this->socket = $this->sockets[$hostmask];
}
// Set the active connection
return parent::setConnection($connection);
}
/**
* Returns a list of hostmasks corresponding to sockets with data to read.
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*
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* @param int $sec Length of time to wait for new data (seconds)
* @param int $usec Length of time to wait for new data (microseconds)
*
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* @return array List of hostmasks or an empty array if none were found
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* to have data to read
*/
public function getActiveReadSockets($sec = 0, $usec = 200000)
{
$read = $this->sockets;
$write = null;
$error = null;
$active = array();
if (count($this->sockets) > 0) {
$number = stream_select($read, $write, $error, $sec, $usec);
if ($number > 0) {
foreach ($read as $item) {
$active[] = array_search($item, $this->sockets);
}
}
}
return $active;
}
/**
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* Sets the amount of time to wait for a new event each time the socket
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* is polled.
*
* @param float $timeout Amount of time in seconds
*
* @return Phergie_Driver_Streams Provides a fluent interface
*/
public function setTimeout($timeout)
{
$timeout = (float) $timeout;
if ($timeout) {
$this->timeout = $timeout;
}
return $this;
}
/**
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* Returns the amount of time to wait for a new event each time the
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* socket is polled.
*
* @return float Amount of time in seconds
*/
public function getTimeout()
{
return $this->timeout;
}
/**
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* Supporting method to parse event argument strings where the last
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* argument may contain a colon.
*
* @param string $args Argument string to parse
* @param int $count Optional maximum number of arguments
*
* @return array Array of argument values
*/
protected function parseArguments($args, $count = -1)
{
return preg_split('/ :?/S', $args, $count);
}
/**
* Listens for an event on the current connection.
*
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* @return Phergie_Event_Interface|null Event instance if an event was
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* received, NULL otherwise
*/
public function getEvent()
{
// Check the socket is still active
if (feof($this->socket)) {
throw new Phergie_Driver_Exception(
'EOF detected on socket',
Phergie_Driver_Exception::ERR_CONNECTION_READ_FAILED
);
}
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// Check for a new event on the current connection
$buffer = fgets($this->socket, 512);
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if ($buffer === false) {
throw new Phergie_Driver_Exception(
'Unable to read from socket',
Phergie_Driver_Exception::ERR_CONNECTION_READ_FAILED
);
}
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// If no new event was found, return NULL
if (empty($buffer)) {
return null;
}
// Strip the trailing newline from the buffer
$buffer = rtrim($buffer);
// If the event is from the server...
if (substr($buffer, 0, 1) != ':') {
// Parse the command and arguments
list($cmd, $args) = array_pad(explode(' ', $buffer, 2), 2, null);
} else {
// If the event could be from the server or a user...
// Parse the server hostname or user hostmask, command, and arguments
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list($prefix, $cmd, $args)
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= array_pad(explode(' ', ltrim($buffer, ':'), 3), 3, null);
if (strpos($prefix, '@') !== false) {
$hostmask = Phergie_Hostmask::fromString($prefix);
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} else {
$hostmask = new Phergie_Hostmask(null, null, $prefix);
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}
}
// Parse the event arguments depending on the event type
$cmd = strtolower($cmd);
switch ($cmd) {
case 'names':
case 'nick':
case 'quit':
case 'ping':
case 'join':
case 'error':
$args = array(ltrim($args, ':'));
break;
case 'privmsg':
case 'notice':
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$args = $this->parseArguments($args, 2);
list($source, $ctcp) = $args;
if (substr($ctcp, 0, 1) === "\001" && substr($ctcp, -1) === "\001") {
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$ctcp = substr($ctcp, 1, -1);
$reply = ($cmd == 'notice');
list($cmd, $args) = array_pad(explode(' ', $ctcp, 2), 2, null);
$cmd = strtolower($cmd);
switch ($cmd) {
case 'version':
case 'time':
case 'finger':
if ($reply) {
$args = $ctcp;
}
break;
case 'ping':
if ($reply) {
$cmd .= 'Response';
} else {
$cmd = 'ctcpPing';
}
break;
case 'action':
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$args = array($source, $args);
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break;
default:
$cmd = 'ctcp';
if ($reply) {
$cmd .= 'Response';
}
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$args = array($source, $args);
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break;
}
}
break;
case 'oper':
case 'topic':
case 'mode':
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$args = $this->parseArguments($args);
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break;
case 'part':
case 'kill':
case 'invite':
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$args = $this->parseArguments($args, 2);
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break;
case 'kick':
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$args = $this->parseArguments($args, 3);
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break;
// Remove the target from responses
default:
$args = substr($args, strpos($args, ' ') + 1);
break;
}
// Create, populate, and return an event object
if (ctype_digit($cmd)) {
$event = new Phergie_Event_Response;
$event
->setCode($cmd)
->setDescription($args);
} else {
$event = new Phergie_Event_Request;
$event
->setType($cmd)
->setArguments($args);
if (isset($hostmask)) {
$event->setHostmask($hostmask);
}
}
$event->setRawData($buffer);
return $event;
}
/**
* Initiates a connection with the server.
*
* @return void
*/
public function doConnect()
{
// Listen for input indefinitely
set_time_limit(0);
// Get connection information
$connection = $this->getConnection();
$hostname = $connection->getHost();
$port = $connection->getPort();
$password = $connection->getPassword();
$username = $connection->getUsername();
$nick = $connection->getNick();
$realname = $connection->getRealname();
$transport = $connection->getTransport();
// Establish and configure the socket connection
$remote = $transport . '://' . $hostname . ':' . $port;
$this->socket = @stream_socket_client($remote, $errno, $errstr);
if (!$this->socket) {
throw new Phergie_Driver_Exception(
'Unable to connect: socket error ' . $errno . ' ' . $errstr,
Phergie_Driver_Exception::ERR_CONNECTION_ATTEMPT_FAILED
);
}
$seconds = (int) $this->timeout;
$microseconds = ($this->timeout - $seconds) * 1000000;
stream_set_timeout($this->socket, $seconds, $microseconds);
// Send the password if one is specified
if (!empty($password)) {
$this->send('PASS', $password);
}
// Send user information
$this->send(
'USER',
array(
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$username,
$hostname,
$hostname,
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$realname
)
);
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$this->send('NICK', $nick);
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// Add the socket handler to the internal array for socket handlers
$this->sockets[(string) $connection->getHostmask()] = $this->socket;
}
/**
* Terminates the connection with the server.
*
* @param string $reason Reason for connection termination (optional)
*
* @return void
*/
public function doQuit($reason = null)
{
// Send a QUIT command to the server
$this->send('QUIT', $reason);
// Terminate the socket connection
fclose($this->socket);
// Remove the socket from the internal socket list
unset($this->sockets[(string) $this->getConnection()->getHostmask()]);
}
/**
* Joins a channel.
*
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* @param string $channels Comma-delimited list of channels to join
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* @param string $keys Optional comma-delimited list of channel keys
*
* @return void
*/
public function doJoin($channels, $keys = null)
{
$args = array($channels);
if (!empty($keys)) {
$args[] = $keys;
}
$this->send('JOIN', $args);
}
/**
* Leaves a channel.
*
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* @param string $channels Comma-delimited list of channels to leave
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*
* @return void
*/
public function doPart($channels)
{
$this->send('PART', $channels);
}
/**
* Invites a user to an invite-only channel.
*
* @param string $nick Nick of the user to invite
* @param string $channel Name of the channel
*
* @return void
*/
public function doInvite($nick, $channel)
{
$this->send('INVITE', array($nick, $channel));
}
/**
* Obtains a list of nicks of usrs in currently joined channels.
*
* @param string $channels Comma-delimited list of one or more channels
*
* @return void
*/
public function doNames($channels)
{
$this->send('NAMES', $channels);
}
/**
* Obtains a list of channel names and topics.
*
* @param string $channels Comma-delimited list of one or more channels
* to which the response should be restricted
* (optional)
*
* @return void
*/
public function doList($channels = null)
{
$this->send('LIST', $channels);
}
/**
* Retrieves or changes a channel topic.
*
* @param string $channel Name of the channel
* @param string $topic New topic to assign (optional)
*
* @return void
*/
public function doTopic($channel, $topic = null)
{
$args = array($channel);
if (!empty($topic)) {
$args[] = $topic;
}
$this->send('TOPIC', $args);
}
/**
* Retrieves or changes a channel or user mode.
*
* @param string $target Channel name or user nick
* @param string $mode New mode to assign (optional)
*
* @return void
*/
public function doMode($target, $mode = null)
{
$args = array($target);
if (!empty($mode)) {
$args[] = $mode;
}
$this->send('MODE', $args);
}
/**
* Changes the client nick.
*
* @param string $nick New nick to assign
*
* @return void
*/
public function doNick($nick)
{
$this->send('NICK', $nick);
}
/**
* Retrieves information about a nick.
*
* @param string $nick Nick
*
* @return void
*/
public function doWhois($nick)
{
$this->send('WHOIS', $nick);
}
/**
* Sends a message to a nick or channel.
*
* @param string $target Channel name or user nick
* @param string $text Text of the message to send
*
* @return void
*/
public function doPrivmsg($target, $text)
{
$this->send('PRIVMSG', array($target, $text));
}
/**
* Sends a notice to a nick or channel.
*
* @param string $target Channel name or user nick
* @param string $text Text of the notice to send
*
* @return void
*/
public function doNotice($target, $text)
{
$this->send('NOTICE', array($target, $text));
}
/**
* Kicks a user from a channel.
*
* @param string $nick Nick of the user
* @param string $channel Channel name
* @param string $reason Reason for the kick (optional)
*
* @return void
*/
public function doKick($nick, $channel, $reason = null)
{
$args = array($nick, $channel);
if (!empty($reason)) {
$args[] = $response;
}
$this->send('KICK', $args);
}
/**
* Responds to a server test of client responsiveness.
*
* @param string $daemon Daemon from which the original request originates
*
* @return void
*/
public function doPong($daemon)
{
$this->send('PONG', $daemon);
}
/**
* Sends a CTCP ACTION (/me) command to a nick or channel.
*
* @param string $target Channel name or user nick
* @param string $text Text of the action to perform
*
* @return void
*/
public function doAction($target, $text)
{
$buffer = rtrim('ACTION ' . $text);
$this->doPrivmsg($target, chr(1) . $buffer . chr(1));
}
/**
* Sends a CTCP response to a user.
*
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* @param string $nick User nick
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* @param string $command Command to send
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* @param string|array $args String or array of sequential arguments
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* (optional)
*
* @return void
*/
protected function doCtcp($nick, $command, $args = null)
{
if (is_array($args)) {
$args = implode(' ', $args);
}
$buffer = rtrim(strtoupper($command) . ' ' . $args);
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$this->doNotice($nick, chr(1) . $buffer . chr(1));
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}
/**
* Sends a CTCP PING request or response (they are identical) to a user.
*
* @param string $nick User nick
* @param string $hash Hash to use in the handshake
*
* @return void
*/
public function doPing($nick, $hash)
{
$this->doCtcp($nick, 'PING', $hash);
}
/**
* Sends a CTCP VERSION request or response to a user.
*
* @param string $nick User nick
* @param string $version Version string to send for a response
*
* @return void
*/
public function doVersion($nick, $version = null)
{
if ($version) {
$this->doCtcp($nick, 'VERSION', $version);
} else {
$this->doCtcp($nick, 'VERSION');
}
}
/**
* Sends a CTCP TIME request to a user.
*
* @param string $nick User nick
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* @param string $time Time string to send for a response
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*
* @return void
*/
public function doTime($nick, $time = null)
{
if ($time) {
$this->doCtcp($nick, 'TIME', $time);
} else {
$this->doCtcp($nick, 'TIME');
}
}
/**
* Sends a CTCP FINGER request to a user.
*
* @param string $nick User nick
* @param string $finger Finger string to send for a response
*
* @return void
*/
public function doFinger($nick, $finger = null)
{
if ($finger) {
$this->doCtcp($nick, 'FINGER', $finger);
} else {
$this->doCtcp($nick, 'FINGER');
}
}
/**
* Sends a raw command to the server.
*
* @param string $command Command string to send
*
* @return void
*/
public function doRaw($command)
{
$this->send('RAW', $command);
}
}