/**
* Inject frame and procotol objects.
*
* @param McFrazier\PhpBinaryCql\CqlFrame $frame
* @param NULL | McFrazier\PhpBinaryCql\CqlProtocol $protocol
*/
public function __construct($frame, $protocol = NULL)
{
// set verison
$this->_version = $frame->getVersion();
// set flag
$this->_flag = $frame->getFlag();
// set stream
$this->_stream = $frame->getStream();
// set opcode
$this->_opcode = $frame->getOpcode();
// set bin body
$this->_body = $frame->getBody();
// parse the framebody
$this->_data = $protocol->parseBinaryFrame($frame);
// check if we have an error response
if ((int) $this->_opcode === (int) \McFrazier\PhpBinaryCql\CqlConstants::FRAME_OPCODE_ERROR) {
// we have an error set the error flag to true
$this->_isError = TRUE;
// set the error code
$this->_errorCode = $this->_data->code;
// set the error message
$this->_errorMessage = $this->_data->msg;
}
$protocol->resetCounters();
}
/**
* Builds a binary frame, from a frame object.
*
* @param McFrazier\PhpBinaryCql\CqlFrame $frame
* @return string
*/
public function generateBinaryFrame($frame)
{
// get flag status
$flagStatus = $this->_checkFrameFlags($frame->getFlag());
// binary body length
$frameBody = $frame->getBody();
$frameBodyLength = NULL;
// @TODO need to add a check to check which compression was used
// in the frame, can't assume snappy.
if ($flagStatus->compression) {
// compressed
$frameBody = snappy_compress($frameBody);
$bodyLength = strlen($frameBody);
$frameBodyLength = $this->generateInt($bodyLength);
} else {
// not compressed
$bodyLength = strlen($frameBody);
$frameBodyLength = $this->generateInt($bodyLength);
}
// build frame header
$header = pack("hhhh", $frame->getVersion(), $frame->getFlag(), $frame->getStream(), $frame->getOpcode());
$header .= $frameBodyLength;
return $header . $frameBody;
}