//	| ########################################################################## |
//	|-------------- powered by Djingle -------- AJAX functions ----------------- |
//	| ########################################################################## |


var ICON_OK='<img src="http://www.djingle.fr/inc/tpl/default/images/icons/icon_ok.gif" border=0 align=absmiddle alt="Ok!" title="Ok!" />';
var ICON_KO='<img src="http://www.djingle.fr/inc/tpl/default/images/icons/icon_ko.gif" border=0 align=absmiddle alt="KO!" title="KO!" />';
var LOADING='<img src="http://www.djingle.fr/inc/tpl/default/images/icons/loading.gif" border=0 align=absmiddle />';

var ajaxObject = null;
function _array2String(myArray) {
	var tmp="";
	for (var k in myArray) {
		tmp=tmp+k+"="+myArray[k]+"&";
	}
	return tmp;
}

function ajaxRequestManager(URL, params_array, method) {

	this.URL=URL;
	this.paramsArray=params_array;
	if (method) this.method=method;
	else this.method='GET';

	this.outputFormat='json';
	this.debugMode=false;

	this.lastError='';
	this.lastErrorMessage='';


	this._callAJAX = function(asynchrone) {

		if(window.XMLHttpRequest) // Firefox
			ajaxObject = new XMLHttpRequest();
		else if(window.ActiveXObject) // Internet Explorer
			ajaxObject = new ActiveXObject("Microsoft.XMLHTTP");
		else {
			// XMLHttpRequest unavailable
			alert("Your browser does not support XMLHTTPRequest.");
			return;
		}

		var data = "";
		for (var name in this.paramsArray) {
			if ( data.length>0 ) data += "&";
			data += name + "=" + encodeURIComponent( this.paramsArray[name] );
		}

		if(this.method == "POST") {
			ajaxObject.open(this.method, this.URL, ((asynchrone)?asynchrone:false));
			ajaxObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded; charset=UTF-8");  // UTF-8 is optional but just in case...

			ajaxObject.send(data);

		} else if(this.method == "GET") {
			ajaxObject.open(this.method, this.URL+"?"+data, ((asynchrone)?asynchrone:false));
			ajaxObject.send(null);
		}
		return ajaxObject;
	};

	this.onSuccess = function(result) {
		return true;
	};

	this.onError = function(result) {
		this.lastError=result['error'];
		this.lastErrorMessage=result['error_message'];
		return false;
	};

	this._isJSON = function(str) {
		var test1=/^\s*$/.test(str);
    	if (test1) return false;
    	str = str.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    	//alert('AFTER REPLACE:' + str);
    	return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  	};

	this.processRequest = function(asynchrone) {

		//add custom params
		//this.paramsArray['_output']=this.outputFormat;
		this.paramsArray['_output']='json';//force json to force javascript redirect

		if (this.debugMode)
			alert("Ajax call: "+this.URL +"?"+ _array2String(this.paramsArray));

		var _response = this._callAJAX(asynchrone);

		if(_response.readyState == 4) {

			var myAjaxResponse=_response.responseText;

			if (this.debugMode)
				alert("Ajax script answered text: "+myAjaxResponse);

			//check if session was not lost (nor rights mismatch)
			var _result = false;

			if (this._isJSON( myAjaxResponse ) ) {
				_result = JSON.parse( myAjaxResponse );
				if (_result['result']!='ok') {
					switch(_result['error']) {
						case '10':
						document.location='http://www.djingle.fr/index.php?module=Home&class=Home';
						break;

						case '11':
						document.location='http://www.djingle.fr/index.php?module=AccessManager&class=AccessManager&action=displayRightsMismatch';
						break;
					}
				}
			}

			if (this.outputFormat=='json') {

				//force parse (cause _isJSON is not 100% perfect)
				_result = JSON.parse( myAjaxResponse );
				if ( _result ) {
					if (_result['result']=='ok') {
						return this.onSuccess(_result);
					} else {
						return this.onError(_result);
					}
				} else {
					var tmp=new Array;
					tmp['error']=100;
					tmp['error_message']='Empty Json string';
					return this.onError(tmp);
				}

			} else {
				//just return result
                 /* if (this.outputFormat=='html') */
				return myAjaxResponse;
			}
		}
	};
}

//usefull fct for quick standard ajax use cases
function ajaxAction(_module, _class, _action, other_data, notif_layer, debug_mode) {

    if (notif_layer) {
        var l=new LAYER(notif_layer);
        l.WriteInto(LOADING);
    }

    var data=new Object;
    if (other_data)
        data = other_data;
	data['module']=_module;
	data['class']=_class;
	data['action']=_action;

    var myAjaxInterface = new ajaxRequestManager('http://www.djingle.fr/index.php', data);
    myAjaxInterface.debugMode=debug_mode;

    myAjaxInterface.onSuccess = function(result) {
        if (notif_layer) {
            l.WriteInto(ICON_OK);
            setTimeout('document.getElementById("'+notif_layer+'").innerHTML="";',1000);
        }
        return true;
    };
	myAjaxInterface.onError = function(result) {
		if (notif_layer) l.WriteInto(ICON_KO+' <font class=error>'+result['error_message']+' ('+result['error']+')</font>');
        return false;
	};
	myAjaxInterface.processRequest(false);
	return false;
}



//################################################## jQuery Style ####################################################
//################################################## jQuery Style ####################################################
//################################################## jQuery Style ####################################################

var SERVER_URL = 'http://www.djingle.fr/';
var jQueryService = null;

AjaxjQueryManager = function( url )
{
    //needs a function called _log

	this.svcUrl = url;
    this.debugMode = false;
    this.displayAjaxResponse = false;

    this._array2String = function (myArray) {
    	var tr='foo=foo&';
    	for (var k in myArray) {
    		tr+=k+"="+encodeURIComponent(myArray[k])+"&";
    	}
        if (this.debugMode) tr+='debugMode=true&';
    	return tr;
    };

	this._handleSuccess = function( resObj, successHandler, errorHandler )//function( xhr, status, handler )
	{
		if ( this.debugMode ) {
			_log('Ajax success', false,
				(this.displayAjaxResponse ? JSON.stringify(resObj,null,'\t')+"\n\n" : "") +	// TODO format
				(resObj.debug ? "Debug data:\n"+resObj.debug : "") );
		}

		if ( !("result" in resObj) ) {

            if ( resObj.errorCode == 10)
                document.location=SERVER_URL+'index.php?module=Home&class=Home';

			else if (resObj.errorCode == 11)
                document.location=SERVER_URL+'index.php?module=AccessManager&class=AccessManager&action=displayRightsMismatch';

            else if ( resObj.errorCode ) {
				_log("API error ("+resObj.errorCode+"): "+resObj.errorMsg, true);
				if ( errorHandler )
					try { errorHandler(resObj/*.errorMsg ?*/, "api_error", resObj.retry); }
						catch(e) { dumpError(e, "Exception in ajax error handler"); }

			} else {
				_log("API invalid response", true, JSON.stringify(resObj,null,'\t'));
				if ( errorHandler )
					try { errorHandler(resObj, "api_exception", false); }
						catch(e) { dumpError(e, "Exception in ajax error handler"); }
			}

		} else {
			if ( successHandler )
				try { successHandler(resObj.result); }
					catch(e) { dumpError(e, "Exception in ajax success handler"); }
		}
	};

	this._handleError = function( xhr, status, errorHandler )
	{
		_log('Ajax '+status, true, xhr.responseText); // TODO not enough, find error description if status==error
		if ( status != "abort" )
			if ( errorHandler )
				try { errorHandler(xhr.responseText, status, false); }
					catch(e) { dumpError(e, "Exception in ajax error handler"); }
	};


	//TODO : see http://api.jquery.com/jQuery.getJSON/
	// onSuccess : function( result object )
	// onError : function( result(obj/string), status(string), isRecoverable(bool) )
	this._ajaxCall = function( params, onSuccess, onError )
	{
		var paramsStr = this._array2String(params);

		if (this.debugMode) _log("Ajax call", false, paramsStr);

		return $.ajax({
			method:	"get",
			url:	this.svcUrl,
			data:	paramsStr+'_output=json',
			dataType:   "json",
			context:	this,
			//complete:	function(xhr, status) { this._handleResponse(xhr, status, onComplete); },
			success:	function(res)			{ this._handleSuccess(res, onSuccess, onError); },
			error:	  function(xhr, st, except)	{ this._handleError(xhr, st, onError); }
		});
	};

}

function ajaxjQuery(tModule, tClass, tAction, params, onSuccess, onError, debugMode, loadingDiv, loadingStr) {
    if (loadingDiv) {
        $('#'+loadingDiv).html(loadingStr);
    }
    jQueryService = new AjaxjQueryManager(SERVER_URL+'index.php?module='+tModule+'&class='+tClass+'&action='+tAction);
    if (debugMode) jQueryService.debugMode=true;
    if (debugMode===2) jQueryService.displayAjaxResponse = true;

    return jQueryService._ajaxCall(params, onSuccess, onError);
}