//  --------------------------------------------------------------- //
//      AJAX AGENT v.0.1:  ... helping WEB become the platform      //
//           Copyright (c) 2006 AJAXAGENT.org  << A A >>            //
//                  <http://www.ajaxagent.org/>                     //
//  --------------------------------------------------------------- //
//                                                                  //
//  This program is free software; you can redistribute it and/or   //
//  modify it under the terms of the GNU General Public License     //
//  as published by the Free Software Foundation; either version 2  //
//  of the License, or (at your option) any later version.          //
//                                                                  //
//  This program 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 General Public License for more details.                    //
//                                                                  //
//  You should have received a copy of the GNU General Public       //
//  License along with this program; if not, write to the Free      //
//  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,     //
//  Boston, MA  02110-1301, USA.                                    //
//                                                                  //
//  --------------------------------------------------------------- //
//                                                                  //
//  If you wish to contribute to/participate in this open source    //
//  project, please contact us at -                                 //
//  Steve Hemmady (steve@ajaxagent.org),                            // 
//  Anuta Udyawar (anuta@ajaxagent.org)                             //
//                                                                  //
//  --------------------------------------------------------------- //

/*
Copyright (c) 2005 JSON.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The Software shall be used for Good, not Evil.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

/*
    The global object JSON contains two methods.

    JSON.stringify(value) takes a JavaScript value and produces a JSON text.
    The value must not be cyclical.

    JSON.parse(text) takes a JSON text and produces a JavaScript value. It will
    throw a 'JSONError' exception if there is an error.
*/
var JSON = {
    copyright: '(c)2005 JSON.org',
    license: 'http://www.crockford.com/JSON/license.html',
/*
    Stringify a JavaScript value, producing a JSON text.
*/
    stringify: function (v) {
        var a = [];

/*
    Emit a string.
*/
        function e(s) {
            a[a.length] = s;
        }

/*
    Convert a value.
*/
        function g(x) {
            var c, i, l, v;

            switch (typeof x) {
            case 'object':
                if (x) {
                    if (x instanceof Array) {
                        e('[');
                        l = a.length;
                        for (i = 0; i < x.length; i += 1) {
                            v = x[i];
                            if (typeof v != 'undefined' &&
                                    typeof v != 'function') {
                                if (l < a.length) {
                                    e(',');
                                }
                                g(v);
                            }
                        }
                        e(']');
                        return;
                    } else if (typeof x.toString != 'undefined') {
                        e('{');
                        l = a.length;
                        for (i in x) {
                            v = x[i];
                            if (x.hasOwnProperty(i) &&
                                    typeof v != 'undefined' &&
                                    typeof v != 'function') {
                                if (l < a.length) {
                                    e(',');
                                }
                                g(i);
                                e(':');
                                g(v);
                            }
                        }
                        return e('}');
                    }
                }
                e('null');
                return;
            case 'number':
                e(isFinite(x) ? +x : 'null');
                return;
            case 'string':
                l = x.length;
                e('"');
                for (i = 0; i < l; i += 1) {
                    c = x.charAt(i);
                    if (c >= ' ') {
                        if (c == '\\' || c == '"') {
                            e('\\');
                        }
                        e(c);
                    } else {
                        switch (c) {
                        case '\b':
                            e('\\b');
                            break;
                        case '\f':
                            e('\\f');
                            break;
                        case '\n':
                            e('\\n');
                            break;
                        case '\r':
                            e('\\r');
                            break;
                        case '\t':
                            e('\\t');
                            break;
                        default:
                            c = c.charCodeAt();
                            e('\\u00' + Math.floor(c / 16).toString(16) +
                                (c % 16).toString(16));
                        }
                    }
                }
                e('"');
                return;
            case 'boolean':
                e(String(x));
                return;
            default:
                e('null');
                return;
            }
        }
        g(v);
        return a.join('');
    },
/*
    Parse a JSON text, producing a JavaScript value.
*/
    parse: function (text) {
        return (/^(\s+|[,:{}\[\]]|"(\\["\\\/bfnrtu]|[^\x00-\x1f"\\]+)*"|-?\d+(\.\d*)?([eE][+-]?\d+)?|true|false|null)+$/.test(text)) &&
            eval('(' + text + ')');
    }
};

function Agent() {
  this.call = function () {
    var aa_sfunc = "";
    var aa_cfunc = "";
    var result = "";
    var xmlHttpObject;
    if(arguments.length<3) {
      alert("Incorrect number of parameters. Please check your function call");
      return;
    } 
    aa_url=arguments[0];
    aa_sfunc=arguments[1];
    aa_cfunc=arguments[2];

    if((aa_url==null)||(aa_url=="")) aa_url = this_url;
    var aa_poststr = "aa_afunc=call&aa_sfunc=" + encodeURI(aa_sfunc) +
        "&aa_cfunc=" + encodeURI(aa_cfunc);
    for(var i=3; i<arguments.length; i++) {
      if(typeof(arguments[i])=='object') {
        aa_poststr += "&aa_sfunc_args[]="+encodeURI(JSON.stringify(arguments[i]));
      } else {
        aa_poststr += "&aa_sfunc_args[]="+encodeURI(arguments[i]);
      }
    }
    xmlHttpObject = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
       xmlHttpObject = new XMLHttpRequest();
       if (xmlHttpObject.overrideMimeType) {
          xmlHttpObject.overrideMimeType('text/xml');
       }
    } else if (window.ActiveXObject) { // IE
       try {
          xmlHttpObject = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
          try {
             xmlHttpObject = new ActiveXObject("Microsoft.XMLHTTP");
          } catch (e) {}
       }
    }
    if (!xmlHttpObject) {
       alert('Agent unable to establish communication  :( ');
       return false;
    }
    
    if((aa_sfunc==null)||(aa_sfunc=="")) {
      if(arguments[3]) aa_poststr=arguments[3];
    }
    
    if((aa_cfunc==null)||(aa_cfunc=="")) {
      xmlHttpObject.open('POST', aa_url, false);
      xmlHttpObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xmlHttpObject.setRequestHeader("Content-length", arguments.length+1);
      xmlHttpObject.setRequestHeader("Connection", "close");
      xmlHttpObject.send(aa_poststr);
      return xmlHttpObject.responseText;
    } else {
      xmlHttpObject.onreadystatechange = function () {
        if (xmlHttpObject.readyState == 4) {
           if (xmlHttpObject.status == 200) {
              result = xmlHttpObject.responseText;
              result = result.replace(/\\\"/g,'"');
              if(document.getElementById(aa_cfunc)) {
                try {
                  document.getElementById(aa_cfunc).innerHTML=result;
                }
                catch (e) {
                  document.getElementById(aa_cfunc).value=result;
                }               
              } else {
                if (JSON.parse(result)) 
                  eval(aa_cfunc+"(JSON.parse(result));");
                else 
                  eval(aa_cfunc+"(result);");
              }
           } else {
              //alert('There was a problem with the request.');
           }
        }
      }
      xmlHttpObject.open('POST', aa_url, true);
      xmlHttpObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xmlHttpObject.setRequestHeader("Content-length", arguments.length+1);
      xmlHttpObject.setRequestHeader("Connection", "close");
      xmlHttpObject.send(aa_poststr);
    }
  }
  this.listen = function (aa_event, aa_cfunc) {
    // listener function will come here
  }
}
var agent = new Agent();