WomoLIN/Software/WomoLin/womolin/protocol.cpp

#include "include/protocol.h"
#include <iostream>

namespace womolin::lib::protocol
{

   LibProtocol::LibProtocol( ILibSerial & serial ) : serial( serial ) {}

   bool LibProtocol::getKeyValue( std::string & key, std::string & value)
   {
      // if no key or value found, then send empty strings
      key.clear(); 
      value.clear();

      std::string buffer; 
      buffer.clear();

      if( 0 >=  serial.readData( buffer ) ) // no data read
      {
         return false;
      }

      messageBuffer += buffer;
      buffer.clear(); // clearing for get key and value from protocol string
      
      auto pos = messageBuffer.find( STARTBYTE );
      if ( std::string::npos == pos ){
         messageBuffer.clear();
         return false;
      }
      messageBuffer = messageBuffer.substr( pos + 1 );

      pos = messageBuffer.find( ENDBYTE );
      if ( std::string::npos == pos ){
         return false;
      }

      auto protocolString = messageBuffer.substr( 0, pos );
      messageBuffer = messageBuffer.substr( pos );

      pos = protocolString.find( SEPARATOR );
      if ( std::string::npos == pos ){
         return false;
      }

      key = protocolString.substr( 0, pos );
      value = protocolString.substr( pos + 1 );

      return true;
   }

   void LibProtocol::sendKeyValue( std::string & key, std::string & value )
   {
      std::string message;
      message = STARTBYTE + key + SEPARATOR + value + ENDBYTE + LINEBREAK;
      serial.writeData( message );
   }


}