/******************************************************************************* 
SerialCommand - An Arduino library to tokenize and parse commands received over
a serial port. 
Copyright (C) 2011-2013 Steven Cogswell  <steven.cogswell@gmail.com>
http://awtfy.com

Version 20131021A.   

Version History:
May 11 2011 - Initial version
May 13 2011 -	Prevent overwriting bounds of SerialCommandCallback[] array in addCommand()
			defaultHandler() for non-matching commands
Mar 2012 - Some const char * changes to make compiler happier about deprecated warnings.  
           Arduino 1.0 compatibility (Arduino.h header) 
Oct 2013 - SerialCommand object can be created using a SoftwareSerial object, for SoftwareSerial
           support.  Requires #include <SoftwareSerial.h> in your sketch even if you don't use 
           a SoftwareSerial port in the project.  sigh.   See Example Sketch for usage. 
Oct 2013 - Conditional compilation for the SoftwareSerial support, in case you really, really
           hate it and want it removed.  

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
***********************************************************************************/
#ifndef SerialCommand_h
#define SerialCommand_h

#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

#include <string.h>


#define SERIALCOMMANDBUFFER 32
#define MAXSERIALCOMMANDS 10
#define MAXDELIMETER 2

#define SERIALCOMMANDDEBUG 1
#undef SERIALCOMMANDDEBUG      // Comment this out to run the library in debug mode (verbose messages)

class SerialCommand
{
	public:
		SerialCommand(Stream &stream);  // Constructor for using SoftwareSerial objects

		void clearBuffer();   // Sets the command buffer to all '\0' (nulls)
		char *next();         // returns pointer to next token found in command buffer (for getting arguments to commands)
		void readSerial();    // Main entry point.  
		void addCommand(const char *, void(*)());   // Add commands to processing dictionary
		void setDefaultHandler(void (*function)(char*));    // A handler to call when no valid command received. 
	
	private:
		char inChar;          // A character read from the serial stream 
		char buffer[SERIALCOMMANDBUFFER];   // Buffer of stored characters while waiting for terminator character
		int  bufPos;                        // Current position in the buffer
		char delim[MAXDELIMETER];           // null-terminated list of character to be used as delimeters for tokenizing (default " ")
		char term;                          // Character that signals end of command (default '\r')
		char *token;                        // Returned token from the command buffer as returned by strtok_r
		char *last;                         // State variable used by strtok_r during processing
		typedef struct _callback {
			char command[SERIALCOMMANDBUFFER];
			void (*function)();
		} SerialCommandCallback;            // Data structure to hold Command/Handler function key-value pairs
		int numCommand;
		SerialCommandCallback CommandList[MAXSERIALCOMMANDS];   // Actual definition for command/handler array
		void (*defaultHandler)(char*);           // Pointer to the default handler function 
		Stream *serial;         // Pointer to a user-created SoftwareSerial object
};

#endif //SerialCommand_h