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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Wildfire
* @subpackage Protocol
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: JsonStream.php 16971 2009-07-22 18:05:45Z mikaelkael $
*/
/** Zend_Wildfire_Plugin_Interface */
require_once 'Zend/Wildfire/Plugin/Interface.php';
/** Zend_Wildfire_Channel_Interface */
require_once 'Zend/Wildfire/Channel/Interface.php';
/** Zend_Json */
require_once 'Zend/Json.php';
/**
* Encodes messages into the Wildfire JSON Stream Communication Protocol.
*
* @category Zend
* @package Zend_Wildfire
* @subpackage Protocol
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Wildfire_Protocol_JsonStream
{
/**
* The protocol URI for this protocol
*/
const PROTOCOL_URI = 'http://meta.wildfirehq.org/Protocol/JsonStream/0.2';
/**
* All messages to be sent.
* @var array
*/
protected $_messages = array();
/**
* Plugins that are using this protocol
* @var array
*/
protected $_plugins = array();
/**
* Register a plugin that uses this protocol
*
* @param Zend_Wildfire_Plugin_Interface $plugin The plugin to be registered
* @return boolean Returns TRUE if plugin was registered, false if it was already registered
*/
public function registerPlugin(Zend_Wildfire_Plugin_Interface $plugin)
{
if (in_array($plugin,$this->_plugins)) {
return false;
}
$this->_plugins[] = $plugin;
return true;
}
/**
* Record a message with the given data in the given structure
*
* @param Zend_Wildfire_Plugin_Interface $plugin The plugin recording the message
* @param string $structure The structure to be used for the data
* @param array $data The data to be recorded
* @return boolean Returns TRUE if message was recorded
*/
public function recordMessage(Zend_Wildfire_Plugin_Interface $plugin, $structure, $data)
{
if(!isset($this->_messages[$structure])) {
$this->_messages[$structure] = array();
}
$uri = $plugin->getUri();
if(!isset($this->_messages[$structure][$uri])) {
$this->_messages[$structure][$uri] = array();
}
$this->_messages[$structure][$uri][] = $this->_encode($data);
return true;
}
/**
* Remove all qued messages
*
* @param Zend_Wildfire_Plugin_Interface $plugin The plugin for which to clear messages
* @return boolean Returns TRUE if messages were present
*/
public function clearMessages(Zend_Wildfire_Plugin_Interface $plugin)
{
$uri = $plugin->getUri();
$present = false;
foreach ($this->_messages as $structure => $messages) {
if(!isset($this->_messages[$structure][$uri])) {
continue;
}
$present = true;
unset($this->_messages[$structure][$uri]);
if (!$this->_messages[$structure]) {
unset($this->_messages[$structure]);
}
}
return $present;
}
/**
* Get all qued messages
*
* @return mixed Returns qued messages or FALSE if no messages are qued
*/
public function getMessages()
{
if (!$this->_messages) {
return false;
}
return $this->_messages;
}
/**
* Use the JSON encoding scheme for the value specified
*
* @param mixed $value The value to be encoded
* @return string The encoded value
*/
protected function _encode($value)
{
return Zend_Json::encode($value, true, array('silenceCyclicalExceptions'=>true));
}
/**
* Retrieves all formatted data ready to be sent by the channel.
*
* @param Zend_Wildfire_Channel_Interface $channel The instance of the channel that will be transmitting the data
* @return mixed Returns the data to be sent by the channel.
* @throws Zend_Wildfire_Exception
*/
public function getPayload(Zend_Wildfire_Channel_Interface $channel)
{
if (!$channel instanceof Zend_Wildfire_Channel_HttpHeaders) {
require_once 'Zend/Wildfire/Exception.php';
throw new Zend_Wildfire_Exception('The '.get_class($channel).' channel is not supported by the '.get_class($this).' protocol.');
}
if ($this->_plugins) {
foreach ($this->_plugins as $plugin) {
$plugin->flushMessages(self::PROTOCOL_URI);
}
}
if (!$this->_messages) {
return false;
}
$protocol_index = 1;
$structure_index = 1;
$plugin_index = 1;
$message_index = 1;
$payload = array();
$payload[] = array('Protocol-'.$protocol_index, self::PROTOCOL_URI);
foreach ($this->_messages as $structure_uri => $plugin_messages ) {
$payload[] = array($protocol_index.'-Structure-'.$structure_index, $structure_uri);
foreach ($plugin_messages as $plugin_uri => $messages ) {
$payload[] = array($protocol_index.'-Plugin-'.$plugin_index, $plugin_uri);
foreach ($messages as $message) {
$parts = explode("\n",chunk_split($message, 5000, "\n"));
for ($i=0 ; $i<count($parts) ; $i++) {
$part = $parts[$i];
if ($part) {
$msg = '';
if (count($parts)>2) {
$msg = (($i==0)?strlen($message):'')
. '|' . $part . '|'
. (($i<count($parts)-2)?'\\':'');
} else {
$msg = strlen($part) . '|' . $part . '|';
}
$payload[] = array($protocol_index . '-'
. $structure_index . '-'
. $plugin_index . '-'
. $message_index,
$msg);
$message_index++;
if ($message_index > 99999) {
require_once 'Zend/Wildfire/Exception.php';
throw new Zend_Wildfire_Exception('Maximum number (99,999) of messages reached!');
}
}
}
}
$plugin_index++;
}
$structure_index++;
}
return $payload;
}
}
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