// Lightbox Javascript functions
// These routines make use of the jsCookies library, which must be included
// Note that we will not specify the domain (the current domain, which is the default) is what we want,
// and the path will default to "/" making the cookie available anywhere within this domain.

// Change the days variable to alter the expiry of lightbox cookies
var days = 60;
var today = new Date();
// Calculate new date using milliseconds...
var dateExpire = new Date(today.getTime() + days*24*60*60*1000);

// [lightboxname] - the lightbox to work with ("MyLightbox")
// [value] - the item data to add to the lightbox
function addToLightbox(lightboxname, value) {
     sExisting = getCookie(lightboxname);
	if (sExisting == null) {
		// always append "&" to values as the delimiter
		setCookie(lightboxname, value + "&", dateExpire, "/");
		return true;
	} else {
		if (sExisting.indexOf(value + "&")==-1) {
			// the value isn't already there, so add it to the existing
			setCookie(lightboxname, sExisting + value + "&", dateExpire, "/");
			return true;
		} else {
			return false;
		}
	}
}

function removeFromLightbox(lightboxname, value) {
	if ((sExisting = getCookie(lightboxname)) == null) {
		// Possibly report the error?
	} else {
		if ((iStart = sExisting.indexOf(value + "&"))==-1) {
			// again, nothing to do?
		} else {
			sNewcookieVal = sExisting.substring(0, iStart) + sExisting.substring(iStart + value.length + 1, sExisting.length);
			setCookie(lightboxname, sNewcookieVal, dateExpire, "/")
		}
	}
}

//count the number of values in the cookie
function countValues(lightboxname) {
	sExisting = getCookie(lightboxname);
	if (sExisting  == null)
	{
		return 0;
	}
	var sValues = sExisting.split("&");
	//we always append an "&" so the split will have one more item than we have in the list...
	return sValues.length-1;
}

//return the first matching item in the cookie that starts with the specified string value
function getPartMatch(lightboxname, startsWith) {
	sExisting = getCookie(lightboxname)
	if (sExisting == null)
	{
		return "";
	}
	var sValues = sExisting.split("&");
	for (i=0; i<sValues.length; i++)
	{
		if (sValues[i].indexOf(startsWith)==0)
		{
			return sValues[i];
		}
	}
	return "";
}
function removeAllLightboxCookies() {
	deleteCookie("MyLightbox");
}