#ifndef __Command_h__
#define __Command_h__

#include "TCPSession.h"
#include "ZString.h"

namespace core {

   class CommandList;

   class Session;

   ///
   /// Command
   ///
   /// Use the Command object in combination with a CommandList object to maintain 
   /// a list of functions that can be invoked as a result of processing a request.
   ///

   class Command {

    public:

      ///
      /// This method is used to implement the functionality of the requested command.
      /// This pure virtual function must be implemented in your inheriting object. 
      ///
      /// @param request The request that was entered by the user to invoke this command.
      /// @param session Specify the requesting session so that the execution of the 
      ///                command process can return its output to the session.
      /// @return Returns 0 if execution of the command was successful. Otherwise returns 
      ///         a non-zero value indicating an error condition.
      ///

      virtual int processCommand(coreutils::ZString &request, TCPSession &session);

      ///
      /// Specify the output that will occur to the specified session.
      ///
      /// @param session The session that will receive the output.
      ///

      virtual void output(std::stringstream &out);

   };

}

#endif