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<?php
namespace callnotifier;
class MessageHandler
{
protected $dumpHdl;
/**
* Array of logger object arrays.
* Key is the notification type, value is an array of logger objects
* that want to get notified about the type.
*
* @var array
*/
protected $logger = array(
'msgData' => array(),
'incomingCall' => array(),
'edss1msg' => array(),
);
public function __construct($config)
{
$this->config = $config;
$this->prepareDump();
}
/**
* Add a logger
*
* @param Logger $logger Logger object to register
* @param array|string $types Single notification type or array of such
* types. "*" means "register for all types".
*
* @return self
*/
public function addLogger(Logger $logger, $types)
{
if ($types == '*') {
$types = array_keys($this->logger);
}
$types = (array)$types;
foreach ($types as $type) {
if (!isset($this->logger[$type])) {
throw new \Exception('Unknown log type: ' . $type);
}
$this->logger[$type][] = $logger;
}
}
public function handle($msg)
{
if ($this->config->dumpFile !== null) {
$this->dump($msg);
}
if (substr($msg, 0, 9) != '[DKANPROT') {
//unknown message type
return;
}
$regex = '#^\\[DKANPROT-([^ ]+) ([0-9]+)\\] (.*)$#';
if (!preg_match($regex, $msg, $matches)) {
//message should always be that way
return false;
}
list(, $type, $someid, $details) = $matches;
$this->log(
'msgData',
array(
'type' => $type,
'id' => $someid,
'details' => $details
)
);
if ($type != 'Info') {
$this->parseEDSS1($details);
return;
}
//Vegw/Ets-Cref:[0xffef]/[0x64] - VEGW_SETUP from upper layer to internal destination: CGPN[**22]->CDPN[41],
$regex = '#CGPN\\[([^\\]]+)\\]->CDPN\\[([^\\]]+)\\]#';
if (preg_match($regex, $details, $matches)) {
list(, $from, $to) = $matches;
$this->log('incomingCall', array('from' => $from, 'to' => $to));
}
}
/**
* Example string: "T02: 00 A3 06 0A 08 01 01 5A FF 0A"
*
* @param string $details Detail string of a debug message
*
*/
protected function parseEDSS1($details)
{
if ($details{0} != 'T' && $details{0} != 'N') {
//we only want byte data
return;
}
if (substr($details, 16, 4) != ' 08 ') {
//only E-DSS-1, no other packets
return;
}
$bytestring = substr($details, 5);
$bytes = static::getBytesFromHexString($bytestring);
$msgtype = $bytes{7};
static $interestingTyps = array(
EDSS1_Message::SETUP,
EDSS1_Message::CONNECT,
EDSS1_Message::INFORMATION
);
if (!in_array($msgtype, $interestingTyps)) {
//return;
}
$mp = new EDSS1_Parser();
$msg = $mp->parse($bytes);
$this->log('edss1msg', array('msg' => $msg));
}
protected function log($type, $arData)
{
if (!isset($this->logger[$type])) {
throw new \Exception('Unknown log type: ' . $type);
}
if (count($this->logger[$type])) {
foreach ($this->logger[$type] as $logger) {
$logger->log($type, $arData);
}
}
}
public static function getBytesFromHexString($bytestring)
{
$bytes = '';
foreach (explode(' ', $bytestring) as $strbyte) {
$bytes .= chr(hexdec($strbyte));
}
return $bytes;
}
protected function prepareDump()
{
if ($this->config->dumpFile === null) {
return;
}
$this->dumpHdl = fopen($this->config->dumpFile, 'w');
if (!$this->dumpHdl) {
throw new Exception('Cannot open replay file for reading');
}
}
protected function dump($msg)
{
fwrite($this->dumpHdl, $msg . "\n");
}
}
?>
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