/*
 * Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
 * Rights to this code are as documented in doc/pod/license.pod.
 *
 * JSON-RPC for Ermyth
 *
 * $Id: rpc.C,v 1.7 2007/09/22 14:27:30 pippijn Exp $
 */

//>>>>>>>>>>> rpc.C <<<<<<<<<<<//
#include <map>

#include <svsconfig.h>
#include <stdinc.h>
#include <util/containers.h>
#include <util/predicates.h>

#include "json/json.h"
#include "json/rpc.h"

namespace json
{
  typedef std::map<char const *, void (*) (void *, Value &, Value &), str_lt> method_map;

  method_map methods;

  void
  jsonrpc_add_method (char const * const name, jsonrpc_method method)
  {
    methods[name] = method;
  }

  void
  jsonrpc_system_list_methods (void *userdata, Value &request, Value &response)
  {
    unsigned i = 0;
    Value method_list (arrayValue);
  
    method_map::iterator it;
    for (it = methods.begin (); it != methods.end (); it++)
      {
        method_list[i] = Value (it->first);
        i++;
      }
  
    response["result"] = method_list;
  }

  void
  jsonrpc_service (void *userdata, Value &request, Value &response)
  {
    char const *methodName = static_cast<char const *> (request["method"]);

    if (strcmp (methodName, "system.listMethods") == 0)
      jsonrpc_system_list_methods (userdata, request, response);
    else
      {
	jsonrpc_method method = methods[methodName];
	if (method)
	  (*method) (userdata, request, response);
      }
  }

  void
  jsonrpc_process (void *userdata, char *response_text, char const *request_text, size_t response_len)
  {
    std::string text;
    bool parse_success;
    Value request (objectValue);
    Value response (objectValue);
    Reader reader;
    FastWriter writer;

    parse_success = reader.parse (request_text, request_text + strlen (request_text), request);

    jsonrpc_service (userdata, request, response);

    text = writer.write (response);

    memcpy (response_text, text.c_str (), text.length () + 1);
  }
}