// Licensed Materials - Property of IBM
//
// IBM Cognos Products: pps
//
// (C) Copyright IBM Corp. 2005, 2017
//
// US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
//this JavaScript file provides a layer of abstraction over the browser specific
//xml comunication controls.

function dataItem(name, value) {
	this.name = name;
	this.value = value;
}

function dataCollection() {
	
	var dataArray = new Array();
	
	this.addItem = function(name, value) {
		dataArray[dataArray.length] = new dataItem(name,value);
	}
	
	this.getDataArray = function() {
		return dataArray;
	}
}

//Static public variables
xmlCommunicator.prototype.STATUS_SUCCESS = 1;
xmlCommunicator.prototype.STATUS_FAILED = 0;
xmlCommunicator.prototype.STATUS_ASYNC_SENT = 2;

xmlCommunicator.prototype.MODE_POST = 0;
xmlCommunicator.prototype.MODE_GET = 1;

//Class xmlCommunicator
function xmlCommunicator (admCommandHandler) {

	//Constructor
	
	var mode = this.MODE_POST;
	var ACH = admCommandHandler;	
	
	var xmlResponse = null;
	var textResponse = null;	
	var requestSuccess = false;
	var requestInProgress = false;
	
	function returnSuccess(transport) {
		if (requestInProgress) {
			returnSuccessBlocking(transport);
		
			requestInProgress = false;
			ACH.requestCompleted(); //Inform the adminCommands layer that a request has completed
		}
	}
	
	function returnFailure(transport) {
		if (requestInProgress) {
			returnFailureBlocking(transport);
			
			requestInProgress = false;	
			ACH.requestCompleted(); //Inform the adminCommands layer that a request has completed
		}
	}
	
	function returnException(e) {
		if (requestInProgress) {
			returnExceptionBlocking(e);

			requestInProgress = false;		
			ACH.requestCompleted(); //Inform the adminCommands layer that a request has completed
		}
	}
	
	function returnSuccessBlocking(transport) {
		requestSuccess = true;
		xmlResponse = transport.responseXml;
		textResponse = transport.responseText;
		
		//In Firefoxm it's possible to have gotten a valid XML document, but not have it parsed.
		//So here is a workaround
		
		if (textResponse && !xmlResponse) {
			
			if (typeof (DOMParser) != "undefined") {
				xmlResponse = (new DOMParser()).parseFromString(textResponse,"text/xml");
			}
		}
	}
	
	function returnFailureBlocking(transport) {
		requestSuccess = false;
		xmlResponse = null;
		textResponse = null;
	}
	
	function returnExceptionBlocking(e) {
		requestSuccess = false;
		xmlResponse = null;
		textResponse = null;
	}
	
	//Public methods
	this.setMode = function (theMode) {
		mode = theMode;
	}
	
	this.GetXMLResponse = function() {
		return xmlResponse;
	}
	
	this.GetTextResponse = function() {
		return textResponse;
	}
	
	this.requestSuceeded = function() {
		return requestSuccess;
	}
	
	this.sendRequest = function(dataArray, isBlocking) {
		if (requestInProgress) { 
			return this.STATUS_FAILED;
		} else {
		
			requestInProgress = true;
			
			var requestProps = {};
			requestProps.method = (mode == this.MODE_POST)? "post" : "get";
			//requestProps.parameters = {};
			
			var sPostBody = "";
			for (var i = 0; i < dataArray.length; i++) {
				if (i)
					sPostBody += "&";
	
				sPostBody += dataArray[i].name;
				sPostBody += "=";
				sPostBody += _F_Strings.urlEncode(dataArray[i].value);
				//requestProps.parameters[dataArray[i].name] = dataArray[i].value;
			}
			requestProps.postBody = sPostBody;
			
			requestProps.asynchronous = !(isBlocking);
			
			requestProps.onSuccess = (isBlocking)? returnSuccessBlocking : returnSuccess;
			requestProps.onFailure = (isBlocking)? returnFailureBlocking : returnFailure;
			requestProps.onException = (isBlocking)? returnExceptionBlocking : returnException;
			
			new _F_Ajax.Request("$CGI$", requestProps);
			
			if (isBlocking) {
			 if (requestSuccess)
				return this.STATUS_SUCCESS;
			 else
				return this.STATUS_FAILED;
			} else
				return this.STATUS_ASYNC_SENT;
				
		}
	}
}