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<?php

/**
 * Swift Mailer Core Component.
 * Please read the LICENSE file
 * @copyright Chris Corbyn <chris@w3style.co.uk>
 * @author Chris Corbyn <chris@w3style.co.uk>
 * @package Swift
 * @version 3.3.2
 * @license GNU Lesser General Public License
 */

require_once dirname(__FILE__) . "/Swift/ClassLoader.php";
Swift_ClassLoader::load("Swift_LogContainer");
Swift_ClassLoader::load("Swift_Errors");
Swift_ClassLoader::load("Swift_ConnectionBase");
Swift_ClassLoader::load("Swift_BadResponseException");
Swift_ClassLoader::load("Swift_Cache");
Swift_ClassLoader::load("Swift_CacheFactory");
Swift_ClassLoader::load("Swift_Message");
Swift_ClassLoader::load("Swift_RecipientList");
Swift_ClassLoader::load("Swift_BatchMailer");
Swift_ClassLoader::load("Swift_Events");
Swift_ClassLoader::load("Swift_Events_Listener");

if (!defined("SWIFT_VERSION")) define("SWIFT_VERSION", "3.3.2_4");
if (!defined("SWIFT_NO_START")) define("SWIFT_NO_START", 2);
if (!defined("SWIFT_NO_HANDSHAKE")) define("SWIFT_NO_HANDSHAKE", 4);
if (!defined("SWIFT_ENABLE_LOGGING")) define("SWIFT_ENABLE_LOGGING", 8);
if (!defined("SWIFT_NO_POST_CONNECT")) define("SWIFT_NO_POST_CONNECT", 16);

/**
 * Swift is the central component in the Swift library.
 * @package Swift
 * @author Chris Corbyn <chris@w3style.co.uk>
 * @version 3.3.2
 */
class Swift
{
  /**
   * Constant to flag Swift not to try and connect upon instantiation
   */
  var $NO_START = SWIFT_NO_START;
  /**
   * Constant to tell Swift not to perform the standard SMTP handshake upon connect
   */
  var $NO_HANDSHAKE = SWIFT_NO_HANDSHAKE;
  /**
   * Constant to ask Swift to start logging
   */
  var $ENABLE_LOGGING = SWIFT_ENABLE_LOGGING;
  /**
   * Constant to prevent postConnect() being run in the connection
   */
  var $NO_POST_CONNECT = SWIFT_NO_POST_CONNECT;
  /**
   * The connection object currently active
   * @var Swift_Connection
   */
  var $connection = null;
  /**
   * The domain name of this server (should technically be a FQDN)
   * @var string
   */
  var $domain = null;
  /**
   * Flags to change the behaviour of Swift
   * @var int
   */
  var $options;
  /**
   * Loaded plugins, separated into containers according to roles
   * @var array
   */
  var $listeners = array();
  
  /**
   * Constructor
   * @param Swift_Connection The connection object to deal with I/O
   * @param string The domain name of this server (the client) as a FQDN
   * @param int Optional flags
   * @throws Swift_ConnectionException If a connection cannot be established or the connection is behaving incorrectly
   */
  function Swift(&$conn, $domain=false, $options=null)
  {
    //Do I really have to check for simpletest stuff here??
    if (!is_a($conn, "Swift_Connection") && !is_a($conn, "SimpleMock"))
    {
      trigger_error("Swift requires constructor parameter 1 to be instance of Swift_Connection.");
      return;
    }
    $this->initializeEventListenerContainer();
    $this->setOptions($options);
    $log =& Swift_LogContainer::getLog();
    
    if ($this->hasOption($this->ENABLE_LOGGING) && !$log->isEnabled())
    {
      $log->setLogLevel(SWIFT_LOG_NETWORK);
    }
    
    if (!$domain) $domain = !empty($_SERVER["SERVER_ADDR"]) ? "[" . $_SERVER["SERVER_ADDR"] . "]" : "localhost.localdomain";
    
    $this->setDomain($domain);
    $this->connection =& $conn;
    
    if ($conn && !$this->hasOption($this->NO_START))
    {
      if ($log->hasLevel(SWIFT_LOG_EVERYTHING)) $log->add("Trying to connect...", SWIFT_LOG_NORMAL);
      $this->connect();
    }
  }
  /**
   * Populate the listeners array with the defined listeners ready for plugins
   */
  function initializeEventListenerContainer()
  {
    Swift_ClassLoader::load("Swift_Events_ListenerMapper");
    foreach (Swift_Events_ListenerMapper::getMap() as $listener => $interface)
    {
      if (!isset($this->listeners[$listener]))
        $this->listeners[$listener] = array();
    }
  }
  /**
   * Add a new plugin to Swift
   * Plugins must implement one or more event listeners
   * @param Swift_Events_Listener The plugin to load
   */
  function attachPlugin(&$plugin, $id)
  {
    if (!is_a($plugin, "Swift_Events_Listener"))
    {
      trigger_error("Swift::attachPlugin requires parameter 1 to be instance of Swift_Plugin.");
      return;
    }
    foreach (array_keys($this->listeners) as $key)
    {
      if ($plugin->implementing($key)) $this->listeners[$key][$id] =& $plugin;
    }
  }
  /**
   * Get an attached plugin if it exists
   * @param string The id of the plugin
   * @return Swift_Event_Listener
   */
  function &getPlugin($id)
  {
    $null = null;
    foreach ($this->listeners as $type => $arr)
    {
      if (isset($arr[$id])) return $this->listeners[$type][$id];
    }
    return $null;
  }
  /**
   * Remove a plugin attached under the ID of $id
   * @param string The ID of the plugin
   */
  function removePlugin($id)
  {
    foreach ($this->listeners as $type => $arr)
    {
      if (isset($arr[$id]))
      {
        unset($this->listeners[$type][$id]);
      }
    }
  }
  /**
   * Send a new type of event to all objects which are listening for it
   * @param Swift_Events The event to send
   * @param string The type of event
   */
  function notifyListeners(&$e, $type)
  {
    Swift_ClassLoader::load("Swift_Events_ListenerMapper");
    if (!empty($this->listeners[$type]) && $notifyMethod = Swift_Events_ListenerMapper::getNotifyMethod($type))
    {
      $e->setSwift($this);
      foreach ($this->listeners[$type] as $k => $listener)
      {
        $this->listeners[$type][$k]->$notifyMethod($e);
      }
    }
  }
  /**
   * Check if an option flag has been set
   * @param string Option name
   * @return boolean
   */
  function hasOption($option)
  {
    return ($this->options & $option);
  }
  /**
   * Adjust the options flags
   * E.g. $obj->setOptions(Swift::NO_START | Swift::NO_HANDSHAKE)
   * @param int The bits to set
   */
  function setOptions($options)
  {
    $this->options = (int) $options;
  }
  /**
   * Get the current options set (as bits)
   * @return int
   */
  function getOptions()
  {
    return (int) $this->options;
  }
  /**
   * Set the FQDN of this server as it will identify itself
   * @param string The FQDN of the server
   */
  function setDomain($name)
  {
    $this->domain = (string) $name;
  }
  /**
   * Attempt to establish a connection with the service
   * @throws Swift_ConnectionException If the connection cannot be established or behaves oddly
   */
  function connect()
  {
    $this->connection->start();
    $greeting =& $this->command("", 220);
    if (!$this->hasOption($this->NO_HANDSHAKE))
    {
      $this->handshake($greeting);
    }
    Swift_ClassLoader::load("Swift_Events_ConnectEvent");
    $this->notifyListeners(new Swift_Events_ConnectEvent($this->connection), "ConnectListener");
  }
  /**
   * Disconnect from the MTA
   * @throws Swift_ConnectionException If the connection will not stop
   */
  function disconnect()
  {
    $this->command("QUIT");
    $this->connection->stop();
    Swift_ClassLoader::load("Swift_Events_DisconnectEvent");
    $this->notifyListeners(new Swift_Events_DisconnectEvent($this->connection), "DisconnectListener");
  }
  /**
   * Throws an exception if the response code wanted does not match the one returned
   * @param Swift_Event_ResponseEvent The full response from the service
   * @param int The 3 digit response code wanted
   * @throws Swift_BadResponseException If the code does not match
   */
  function assertCorrectResponse(&$response, $codes)
  {
    if (!is_a($response, "Swift_Events_ResponseEvent"))
    {
      trigger_error("Swift::assertCorrectResponse expects parameter 1 to be of type Swift_Events_ResponseEvent.");
      return;
    }
    $codes = (array)$codes;
    if (!in_array($response->getCode(), $codes))
    {
      $log =& Swift_LogContainer::getLog();
      $error = "Expected response code(s) [" . implode(", ", $codes) . "] but got response [" . $response->getString() . "]";
      if ($log->hasLevel(SWIFT_LOG_ERRORS)) $log->add($error, SWIFT_LOG_ERROR);
      Swift_Errors::trigger(new Swift_BadResponseException($error));
      return false;
    }
    return true;
  }
  /**
   * Have a polite greeting with the server and work out what it's capable of
   * @param Swift_Events_ResponseEvent The initial service line respoonse
   * @throws Swift_ConnectionException If conversation is not going very well
   */
  function handshake(&$greeting)
  {
    if (!is_a($greeting, "Swift_Events_ResponseEvent"))
    {
      trigger_error("Swift::handshake expects parameter 1 to be of type Swift_Events_ResponseEvent.");
      return;
    }
    if ($this->connection->getRequiresEHLO() || strpos($greeting->getString(), "ESMTP"))
      $this->setConnectionExtensions($this->command("EHLO " . $this->domain, 250));
    else $this->command("HELO " . $this->domain, 250);
    //Connection might want to do something like authenticate now
    if (!$this->hasOption($this->NO_POST_CONNECT)) $this->connection->postConnect($this);
  }
  /**
   * Set the extensions which the service reports in the connection object
   * @param Swift_Events_ResponseEvent The list of extensions as reported by the service
   */
  function setConnectionExtensions(&$list)
  {
    if (!is_a($list, "Swift_Events_ResponseEvent"))
    {
      trigger_error("Swift::setConnectionExtensions expects parameter 1 to be of type Swift_Events_ResponseEvent.");
      return;
    }
    $le = (strpos($list->getString(), "\r\n") !== false) ? "\r\n" : "\n";
    $list = explode($le, $list->getString());
    for ($i = 1, $len = count($list); $i < $len; $i++)
    {
      $extension = substr($list[$i], 4);
      $attributes = split("[ =]", $extension);
      $this->connection->setExtension($attributes[0], (isset($attributes[1]) ? array_slice($attributes, 1) : array()));
    }
  }
  /**
   * Execute a command against the service and get the response
   * @param string The command to execute (leave off any CRLF!!!)
   * @param int The code to check for in the response, if any. -1 indicates that no response is wanted.
   * @return Swift_Events_ResponseEvent The server's response (could be multiple lines)
   * @throws Swift_ConnectionException If a code was expected but does not match the one returned
   */
  function &command($command, $code=null)
  {
    $null = null;
    $log =& Swift_LogContainer::getLog();
    if (Swift_Errors::halted()) return $null;
    
    if ($command !== "")
    {
      Swift_ClassLoader::load("Swift_Events_CommandEvent");
      $command_event =& new Swift_Events_CommandEvent($command, $code);
      $command = null; //For memory reasons
      $this->notifyListeners($command_event, "BeforeCommandListener");
      if ($log->hasLevel(SWIFT_LOG_NETWORK) && $code != -1) $log->add($command_event->getString(), SWIFT_LOG_COMMAND);
      $end = ($code != -1) ? "\r\n" : null;
      $this->connection->write($command_event->getString(), $end);
      $this->notifyListeners($command_event, "CommandListener");
    }
    
    if ($code == -1) return $null;
    
    Swift_ClassLoader::load("Swift_Events_ResponseEvent");
    $response_event =& new Swift_Events_ResponseEvent($this->connection->read());
    $this->notifyListeners($response_event, "ResponseListener");
    if ($log->hasLevel(SWIFT_LOG_NETWORK)) $log->add($response_event->getString(), SWIFT_LOG_RESPONSE);
    if ($command !== "" && $command_event->getCode() !== null)
    {
      $this->assertCorrectResponse($response_event, $command_event->getCode());
    }
    return $response_event;
  }
  /**
   * Reset a conversation which has gone badly
   * @throws Swift_ConnectionException If the service refuses to reset
   */
  function reset()
  {
    $this->command("RSET", 250);
  }
  /**
   * Send a message to any number of recipients
   * @param Swift_Message The message to send.  This does not need to (and shouldn't really) have any of the recipient headers set.
   * @param mixed The recipients to send to.  Can be a string, Swift_Address or Swift_RecipientList. Note that all addresses apart from Bcc recipients will appear in the message headers
   * @param mixed The address to send the message from.  Can either be a string or an instance of Swift_Address.
   * @return int The number of successful recipients
   * @throws Swift_ConnectionException If sending fails for any reason.
   */
  function send(&$message, $recipients, $from)
  {
    Swift_ClassLoader::load("Swift_Message_Encoder");
    $encoder =& Swift_Message_Encoder::instance();
    
    if (!is_a($message, "Swift_Message"))
    {
      trigger_error("Swift::send expects parameter 1 to be instance of Swift_Message.");
      return;
    }
    
    if (is_string($recipients) && preg_match("/^" . $encoder->CHEAP_ADDRESS_RE . "\$/", $recipients))
    {
      $recipients =& new Swift_Address($recipients);
    }
    elseif (!is_a($recipients, "Swift_AddressContainer"))
    {
      trigger_error("The recipients parameter must either be a valid string email address, ".
        "an instance of Swift_RecipientList or an instance of Swift_Address.");
      return;
    }
      
    if (is_string($from) && preg_match("/^" . $encoder->CHEAP_ADDRESS_RE . "\$/", $from))
    {
      $from =& new Swift_Address($from);
    }
    elseif (!is_a($from, "Swift_Address"))
    {
      trigger_error("The sender parameter must either be a valid string email address or ".
        "an instance of Swift_Address.");
      return;
    }
    
    $log =& Swift_LogContainer::getLog();
    
    if (!$message->getEncoding() && !$this->connection->hasExtension("8BITMIME"))
    {
      $message->setEncoding("QP", true, true);
    }
    
    $list =& $recipients;
    if (is_a($recipients, "Swift_Address"))
    {
      $list =& new Swift_RecipientList();
      $list->addTo($recipients);
    }
    
    Swift_ClassLoader::load("Swift_Events_SendEvent");
    $send_event =& new Swift_Events_SendEvent($message, $list, $from, 0);
    
    $this->notifyListeners($send_event, "BeforeSendListener");
    
    $to = $cc = array();
    if (!($has_from = $message->getFrom())) $message->setFrom($from);
    if (!($has_return_path = $message->getReturnPath())) $message->setReturnPath($from->build(true));
    if (!($has_reply_to = $message->getReplyTo())) $message->setReplyTo($from);
    if (!($has_message_id = $message->getId())) $message->generateId();
    
    $this->command("MAIL FROM: " . $message->getReturnPath(true), 250);
    
    $failed = 0;
    $sent = 0;
    $tmp_sent = 0;
    $it =& $list->getIterator("to");
    while ($it->hasNext())
    {
      $it->next();
      $address = $it->getValue();
      
      $to[] = $address->build();
      $e = null;
      Swift_Errors::expect($e, "Swift_BadResponseException");
        $this->command("RCPT TO: " . $address->build(true), 250);
      if (!$e) {
        $tmp_sent++;
        Swift_Errors::clear("Swift_BadResponseException");
      } else {
        $failed++;
        $send_event->addFailedRecipient($address->getAddress());
        if ($log->hasLevel(SWIFT_LOG_FAILURES)) $log->addfailedRecipient($address->getAddress());
      }
    }
    $it =& $list->getIterator("cc");
    while ($it->hasNext())
    {
      $it->next();
      $address = $it->getValue();
      
      $cc[] = $address->build();
      $e = null;
      Swift_Errors::expect($e, "Swift_BadResponseException");
        $this->command("RCPT TO: " . $address->build(true), 250);
      if (!$e) {
        $tmp_sent++;
        Swift_Errors::clear("Swift_BadResponseException");
      } else {
        $failed++;
        $send_event->addFailedRecipient($address->getAddress());
        if ($log->hasLevel(SWIFT_LOG_FAILURES)) $log->addfailedRecipient($address->getAddress());
      }
    }
    
    if ($failed == (count($to) + count($cc)))
    {
      $this->reset();
      $this->notifyListeners($send_event, "SendListener");
      return 0;
    }
    
    if (!($has_to = $message->getTo()) && !empty($to)) $message->setTo($to);
    if (!($has_cc = $message->getCc()) && !empty($cc)) $message->setCc($cc);
    
    $this->command("DATA", 354);
    $data =& $message->build();
    
    while (false !== $bytes = $data->read())
      $this->command($bytes, -1);
    if ($log->hasLevel(SWIFT_LOG_NETWORK)) $log->add("<MESSAGE DATA>", SWIFT_LOG_COMMAND);
    Swift_Errors::expect($e, "Swift_BadResponseException");
      $this->command("\r\n.", 250);
    if (!$e) {
      $sent += $tmp_sent;
      Swift_Errors::clear("Swift_BadResponseException");
    } else {
      $failed += $tmp_sent;
    }
    
    $tmp_sent = 0;
    $has_bcc = $message->getBcc();
    $it =& $list->getIterator("bcc");
    while ($it->hasNext())
    {
      $it->next();
      $address = $it->getValue();
      
      if (!$has_bcc) $message->setBcc($address->build());
      $e = null;
      Swift_Errors::expect($e, "Swift_BadResponseException");
        if (!$e) $this->command("MAIL FROM: " . $message->getReturnPath(true), 250);
        if (!$e) $this->command("RCPT TO: " . $address->build(true), 250);
        if (!$e) $this->command("DATA", 354);
        if (!$e) {
          $data =& $message->build();
          while (false !== $bytes = $data->read())
            $this->command($bytes, -1);
          if ($log->hasLevel(SWIFT_LOG_NETWORK)) $log->add("<MESSAGE DATA>", SWIFT_LOG_COMMAND);
          $this->command("\r\n.", 250);
        }
      if (!$e) {
        $sent++;
        Swift_Errors::clear("Swift_BadResponseException");
      } else {
        $failed++;
        $send_event->addFailedRecipient($address->getAddress());
        if ($log->hasLevel(SWIFT_LOG_FAILURES)) $log->addfailedRecipient($address->getAddress());
        $this->reset();
      }
    }
    
    $total = count($to) + count($cc) + count($list->getBcc());
    
    $send_event->setNumSent($sent);
    $this->notifyListeners($send_event, "SendListener");
    
    if (!$has_return_path) $message->setReturnPath("");
    if (!$has_from) $message->setFrom("");
    if (!$has_to) $message->setTo("");
    if (!$has_reply_to) $message->setReplyTo(null);
    if (!$has_cc) $message->setCc(null);
    if (!$has_bcc) $message->setBcc(null);
    if (!$has_message_id) $message->setId(null);
    
    if ($log->hasLevel(SWIFT_LOG_NETWORK)) $log->add("Message sent to " . $sent . "/" . $total . " recipients", SWIFT_LOG_NORMAL);
    
    return $sent;
  }
  /**
   * Send a message to a batch of recipients.
   * Unlike send() this method ignores Cc and Bcc recipients and does not reveal every recipients' address in the headers
   * @param Swift_Message The message to send (leave out the recipient headers unless you are deliberately overriding them)
   * @param Swift_RecipientList The addresses to send to
   * @param Swift_Address The address the mail is from (sender)
   * @return int The number of successful recipients
   */
  function batchSend(&$message, &$to, $from)
  {
    if (!is_a($message, "Swift_Message"))
    {
      trigger_error("Swift::batchSend expects parameter 1 to be instance of Swift_Message.");
      return;
    }
    if (!is_a($to, "Swift_RecipientList"))
    {
      trigger_error("Swift::batchSend expects parameter 2 to be instance of Swift_RecipientList.");
      return;
    }
    $batch =& new Swift_BatchMailer($this);
    return $batch->send($message, $to, $from);
  }
}

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