//

// J.Whelan

// 2007-02-01

// Client-side ad delivery

// --------------------------------------------------------------------------------------



var digErrors	= new Array();



// Map Special Case Rendering Scenarios --

//	key:	InsertionType [String]

//	value:  renderFunctionName [with NO PARENTHESES]

//

// EXAMPLE: digRenderMap["MediumRectangle"] = renderMediumRectangle;

//

var digRenderMap = new Array();

// digRenderMap["SponsoredByLogoHeader"]	= digRenderReturnCreativeText;

// digRenderMap["Banner"]					= render;





function digGetAd(insertionType, forceCreativeReturn) {

	try {

		forceCreativeReturn = (String(forceCreativeReturn) == "true") ? true : false;

		var adDataContainerObj = null;



		if (digAdData != null && digAdData[insertionType] != null) { adDataContainerObj = digAdData[insertionType]; }

		if (adDataContainerObj == null) { adDataContainerObj = new digAdDataContainer(insertionType, null); } // empty ad



		return digRender(adDataContainerObj, forceCreativeReturn);

	}

	catch(e) {

		// Capture error for the console

		digErrors[digErrors.length] = "Issue inserting " + ((insertionType == null || insertionType == "") ? "an unknown insertion type" : insertionType ) + " [ " + e.description + " ]";		

	}

}



// WDIG_render(adDataContainerObj) function: 

// Has the ability to return a string to accommodate the case when digGetAd() is called

// to return the creative text instead of writing it directly to the DOM.

// *** This may be useful in special case rendering scenarios.

function digRender(adDataContainerObj, forceCreativeReturn) {

	if (adDataContainerObj != null) {

		if (adDataContainerObj.creative.text != null) {

			// Check for special rendering scenarios

			var renderFunc = digRenderDefault;										  // <-- Default Rendering

			if (digRenderMap != null) {

				// Prevent recursive reference with *arguments.callee* comparison check

				if (digRenderMap[adDataContainerObj.insertionType]!=null && digRenderMap[adDataContainerObj.insertionType]!=arguments.callee) {

					renderFunc = digRenderMap[adDataContainerObj.insertionType];		// <-- Special Case Rendering

				}

			}

			return renderFunc.apply(this, arguments);								   // <-- Execute Assigned Rendering Function

		}

		else { // Render empty ad

			document.write("<!-- NO AD DATA FOUND FOR INSERTION TYPE: " + adDataContainerObj.insertionType + " -->");

			throw new Error("No ad data found for insertion type: " + adDataContainerObj.insertionType);

		}

	}

	else { throw new Error("Cannot render null adDataContainerObj"); }

	return "";

}



function digRenderDefault(adDataContainerObj, forceCreativeReturn) {

	if (forceCreativeReturn) {

		return adDataContainerObj.creative.text;

	}

	document.write(adDataContainerObj.creative.text);

}



// Generate the DynamicCSAd request with the url parameter.

function digRequestAds(csarUrl, includeHost, cntCodes) {

	adRequestUrl = digGenerateCSARUrl(csarUrl, includeHost, cntCodes, document.location.href);



	// Write the CSAR request url

	document.write("<scr"+"ipt type=\"text/javascript\" src=\"" + adRequestUrl + "\"></scr"+"ipt>");

}



function digGenerateCSARUrl(csarUrl, includeHost, cntCodes, docUrl) {

	if (docUrl == null) {

		docUrl = document.location.href;

	}

	

	if (csarUrl != null) {

		var adRequestUrl = csarUrl;



		if (includeHost != null && !includeHost) {

			// Get the request path from the document url and strip off the scheme and host name

			var index = docUrl.indexOf("://");

			var pageRequestUrl = "/";

			

			if (index > 0) {

				pageRequestUrl = docUrl.substring(index+3);



				index = pageRequestUrl.indexOf("/");

				if (index < 0) {

					pageRequestUrl = "/";

				}

				else {

					pageRequestUrl = pageRequestUrl.substring(index);



					// Filter the url

					pageRequestUrl = pageRequestUrl.replace(/\</g,"%3c").replace(/>/g,"%3e").replace(/\"/g,"%22");

				}



				// Append request url parameter

				if (pageRequestUrl.length > 0) {

					adRequestUrl += "&url=";

					adRequestUrl += pageRequestUrl;

				}

			}

		}



		if (cntCodes != null && cntCodes.length > 0) {

			adRequestUrl += "&cnt_codes=";

			adRequestUrl += cntCodes;

		}

	}

	else {

		throw new Error("CSAR url must be specified");

	}



	return adRequestUrl;

}



// Special Case Rendering Functions -----------------------------------------------------

//

//	Special Case functions must make sure to handle the forceCreativeReturn

//	parameter behavior as the caller would expect it to function.



function digRenderReturnCreativeText(adDataContainerObj) {

	return digRenderDefault(adDataContainerObj, true);

}



// DEBUG CONSOLE ------------------------------------------------------------------------

//

//	  Displays a pop-up window that dispalys the information of the ads that 

//	  were returned.



function digShowDebugConsole() {

	var doc = window.open('','adsDebug','width=' + window.screen.availWidth*0.85 + ', height=' + window.screen.availHeight*0.85 + ', statusbar, resizable, scrollbars', true).document;

	doc.open();



	doc.writeln('<html><head><title>Client-side Ad Serving Console</title></head>\n<body bgcolor="#fffecc">');

	doc.write('<PRE><h3>Client-side Ad Serving Console</h3>');

	

	if (digErrors != null && digErrors.length>0) {

		// Output errors that have been caught

		doc.writeln("<HR /><b>Ad Rendering Issues:</b><ul>");		

		for (var i=0, iSize=digErrors.length; i<iSize; ++i) {

			doc.writeln("<li><font color=\"#ff0000\">" + digErrors[i] + "</font></li>");

		}				

		doc.writeln("</ul>");

	}	



	if (digAdData != null) {

		// Output Delivered Ad Information

		for (var itype in digAdData) {

			doc.write("<HR />");			

			for (var prop in digAdData[itype]) {

				doc.writeln("<b>" + prop + "</b>: " + digAdData[itype][prop]);

				if (typeof digAdData[itype][prop] == 'object') {

					for (var subprop in digAdData[itype][prop]) {

						if (typeof digAdData[itype][prop][subprop] == "string" && digAdData[itype][prop][subprop].length > 0) {

							doc.writeln("\t" + subprop + ":\n\t<TEXTAREA STYLE='font: 8pt; background-color: #eeeeee' READONLY WRAP='OFF' COLS=100 ROWS=10>" + digAdData[itype][prop][subprop] + "</TEXTAREA>");							

						}

					}

				}

			}

			doc.writeln("<BR />");

		}		

		doc.writeln('</PRE>');

	}

	else {

		doc.writeln('<PRE>digAdData array was not initialized.</PRE>');

	}

	doc.writeln('</body></html>');

	doc.close();	

}



// Check if console has been requested

if (location.search.indexOf('WDIG_CS_DEBUG=1') > 0) { 

	try { 

		// Attempts to attach the console launcher to the onLoad 

		// event without overriding previous onLoad handlers.

		if	  (window.addEventListener)	{ window.addEventListener('load', digShowDebugConsole, false);	}	// Gecko, Safari, Konqueror and W3C standard

		else if (document.addEventListener)	{ document.addEventListener('load', digShowDebugConsole, false);	}	// Opera7

		else if (window.attachEvent)	{ window.attachEvent('onload', digShowDebugConsole);				}	// IE

		else	{ window.onload = digShowDebugConsole;							  }	// Override entire event for all other browsers

	} 

	catch(e) {

		window.status = "Could not open console: " + e.description;

		setTimeout("window.status=window.defaultStatus", 5000);

	}

}