//    Licensed Materials - Property of IBM
//
//    IBM Cognos Products:  cpscrn

//
//    (C) Copyright IBM Corp. 2005, 2014
//
//    US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
//
//

(function() {
	// define namespace
	if (!window.com_ibm_cognos_cps){
		com_ibm_cognos_cps = {}
	}
	
	if (com_ibm_cognos_cps.ApplicationContext){
		// Stop if the ApplicationContext is alread defined.
		return;
	}

	// Helper object used to create the xmlHttpRequest based on the current browser
	var CPSConfig = {
		browser: 'unknown',
		browserVersion: 'unknown',
		OS: 'unknown',
		xmlHttpDefault: null,
		initialize: function()
		{
			this.browser = this.lookup(this.browsers).toLowerCase() || 'unknown';
			this.browserVersion = this.parseVersion(navigator.userAgent) || this.parseVersion(navigator.appVersion) || 'unknown';
			this.OS = this.lookup(this.systems) || 'unknown';	
			this.xmlHttpDefault = this.findXMLHttpActiveXVersion();		
		},	
		lookup: function(data)
		{
			var i, l = data.length;
			for (i = 0; i < l; i++)
			{
				this.versionKey = data[i].partialKey || data[i].identity;
				var agent = data[i].agent;
				if (agent)
				{
					if (agent.indexOf(data[i].key) != -1)
						return data[i].identity;
				}
				else if (data[i].prop)
					return data[i].identity;
			}
		},
		parseVersion: function(s)
		{
			var index = s.indexOf(this.versionKey);
			if (index == -1)
				return;
			return parseFloat(s.substring(index + this.versionKey.length + 1).replace(/[^\d\.\-\+]/g, '_'));	//sanitize before parse to avoid XSS vulnerability!
		},
		findXMLHttpActiveXVersion: function()
		{
			if (window.ActiveXObject) 
			{
				var i, l = this.xmlHttpVersions.length;
				for (i = 0; i < l; i++) 
				{
					try 
					{
						// Try and create the ActiveXObject for Internet Explorer, if it doesn't work, try again.
						var xmlhttp = new ActiveXObject(this.xmlHttpVersions[i]);
						if (xmlhttp) 
							return this.xmlHttpVersions[i];
					}
					catch (e) 
					{
						// this ActiveX is not there, continue with next one in list
				 	} 
				}
			}
			return null;
		},
		browsers: [
			{ agent: navigator.userAgent, key: 'MSIE',     identity: 'Explorer', partialKey: 'MSIE'     },
			{ agent: navigator.userAgent, key: 'Firefox',  identity: 'Firefox'                          },
			{ agent: navigator.userAgent, key: 'Gecko',    identity: 'Mozilla',  partialKey: 'rv'       },
			{ agent: navigator.userAgent, key: 'Mozilla',  identity: 'Netscape', partialKey: 'Mozilla'  },
			{ agent: navigator.userAgent, key: 'Netscape', identity: 'Netscape'                         },
			{ prop:  window.opera,                         identity: 'Opera'                            },
			{ agent: navigator.vendor,    key: 'Apple',    identity: 'Safari'                           }
		],

		systems: [
			{ agent: navigator.platform,  key: 'Win',      identity: 'Windows' },
			{ agent: navigator.platform,  key: 'Mac',      identity: 'Mac'     },
			{ agent: navigator.platform,  key: 'Linux',    identity: 'Linux'   }
		],

		xmlHttpVersions: [
			'Msxml2.XMLHTTP.6.0', 
			'Msxml2.XMLHTTP.3.0',
			'Msxml2.XMLHTTP',
			'Microsoft.XMLHTTP'
		]
		
	}

	CPSConfig.initialize();


	/*
		Helper DOM utils.
	*/
	com_ibm_cognos_cps._F_DOM =
	{
		selectNodes: function(node, xpath)
		{
			if (document.all)
			{
				var arr = new Array();
				var nodes = node.selectNodes(xpath);
				var i, l = nodes.length;
				for (i=0; i<l; i++)
				{
					arr.push(nodes.item(i));
				}
				return arr;
			}
			else
			{
				var doc = (node.ownerDocument) ? node.ownerDocument : node;
				var results = doc.evaluate(xpath, node, doc.createNSResolver(doc.documentElement), XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
				if (results)
				{
					var arr = new Array();
					var node = results.iterateNext();
					while (node != null)
					{
						arr.push(node);
						node = results.iterateNext();
					}
					return arr;
				}
				return null;
			}
		},
		
		selectSingleNode: function (node, xpath)
		{
			if (document.all)
			{
				return node.selectSingleNode(xpath);
			}
			else
			{
				var doc = (node.ownerDocument) ? node.ownerDocument : node;
				var results = doc.evaluate(xpath, node, doc.createNSResolver(doc.documentElement), XPathResult.FIRST_ORDERED_NODE_TYPE, null);
				if (results && results.singleNodeValue)
					return results.singleNodeValue;
				return null;
			}
		},
		
		getAttribute: function(node, name)
		{
			return node.getAttribute(name);
		},
		
		text: function(node)
		{
			function deepScanText(node)
			{
				var v = '';
				var n = node.firstChild;
				while (n != null)
				{
					if (n.nodeType == 3)
						v += n.nodeValue;
					else if (n.nodeType == 4)
						v += n.data;
					else if (n.nodeType == 1)
						v += deepScanText(n);
					n = n.nextSibling;
				}
				return v;
			}

			if (node == null || node === undefined)
				return '';
			if (document.all)
				return node.text;
			else if (node.nodeValue)
				return node.nodeValue;
			return deepScanText(node);
		},
		
		parseXml: function(xmlString)
		{
			var xmlDoc = null;
			if (window.ActiveXObject){
				xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
				xmlDoc.async="false";
				xmlDoc.loadXML(xmlString);			
			}
			
			if (xmlDoc == null){
				var parser = new DOMParser();
				xmlDoc = parser.parseFromString(xmlString,"text/xml");
			}
			
			return xmlDoc;
		}

	}

	/*
		This class provides the APS that enables our content to work in enterprise portals.
			getWebContentResource: return an absolute url that will be used to retrieve a webcontent resource
			getGatewayResource: return an absolute url that will be used to retrieve a gateway resource
			getProxiedResource: return a url that can be used to do ajax request without running into cross domain issues
			getXHR: creates an xmlHttpRequest object.
		
	*/
	com_ibm_cognos_cps.ApplicationContext = function(spec){	
		this.getProperty = function(name){
			return spec[name];
		}
	}

	com_ibm_cognos_cps.ApplicationContext.prototype = {
		getWebContentResource: function(resource) {
			return this._getAbsoluteUrl(this.getProperty('webcontent'), resource);
		},
		getGatewayResource: function(resource) {
			return this._getAbsoluteUrl(this.getProperty('gateway'), resource);		
		},
		_getAbsoluteUrl: function(base, url){
			if(url.indexOf(base) !== 0){
				var index = base.indexOf('://');
				if (index !== -1){
					index = base.indexOf('/', index + 3);
					if (index !== -1){
						return base.substring(0, index) + (url.charAt(0) === '/' ? '' : '/' ) + url;
					}
				}
			}		
			return url;
		},
		getProxiedResource:function(url){
			var proxyTemplate = this.getProperty('proxyTemplate');		
			// no proxying in CC
			if (proxyTemplate && !('cognos' == this.getProperty('portalAgent'))){
				return this._cpsresourceurl(this.getProperty('proxyTemplate'), url);
			}
			return url;
		},

		getXHR: function(){
			// plumtree xhr (knows how to handle timeouts ..)
			if (window.CustomPTHttpRequest !== undefined)
				return new CustomPTHttpRequest();
				
			if (CPSConfig.xmlHttpDefault != null) 
				return new ActiveXObject(CPSConfig.xmlHttpDefault);

			// Well if there is no ActiveXObject available it must be firefox, opera, or something else
			if (typeof XMLHttpRequest != 'undefined') 
			{
				return new XMLHttpRequest();
			}
			throw 'No XMLHttpRequest object is available';
		},
		
		_cpsresourceurl: function(resourceTemplate, target){
			var begin = resourceTemplate.indexOf('_cpsresourceurl');
			if (begin != -1){
				var endMarker='cpsendmarker_';
				var end = resourceTemplate.indexOf(endMarker, begin); 
				if (end != -1){
					var marker = resourceTemplate.substring(begin, end + endMarker.length);
					var decodeCount = 0;
					var decodedMarker = marker;
					while(decodedMarker != '_cpsresourceurl:cpsendmarker_' && decodeCount ++ < 10){
						decodedMarker = decodeURIComponent(decodedMarker);
					}

					if (decodeCount  < 10){
						var encodedTarget = target;
						for (i =0; i < decodeCount ; i++){
							encodedTarget = encodeURIComponent(encodedTarget);
						}

						target = resourceTemplate.replace(marker, encodedTarget);
					}
				}
			}
			
			// Plumtree portletIds.. so we can synchronize passports.
			if (window.cognosPortletIds){
				if(target.indexOf('?') != -1)
					target += '&';
				else
					target += '?';				
				target += 'cognosPortletIds='+encodeURIComponent(cognosPortletIds.join('_'));
			}
			
			return target;	
		}

	}
})();