/* Reference Article:
Dustin Diaz:
http://www.dustindiaz.com/top-ten-javascript/
*/

/* addEvent: simplified event attachment */
function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}
	
var EventCache = function(){
	var listEvents = [];
	return {
		listEvents : listEvents,
		add : function(node, sEventName, fHandler){
			listEvents.push(arguments);
		},
		flush : function(){
			var i, item;
			for(i = listEvents.length - 1; i >= 0; i = i - 1){
				item = listEvents[i];
				if(item[0].removeEventListener){
					item[0].removeEventListener(item[1], item[2], item[3]);
				};
				if(item[1].substring(0, 2) != "on"){
					item[1] = "on" + item[1];
				};
				if(item[0].detachEvent){
					item[0].detachEvent(item[1], item[2]);
				};
				item[0][item[1]] = null;
			};
		}
	};
}();
addEvent(window,'unload',EventCache.flush);

/* window 'load' attachment */
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

/* grab Elements from the DOM by className */
function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

/* toggle an element's display */
function toggle(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
	}
}

/* insert an element after a particular node */
function insertAfter(parent, node, referenceNode) {
	parent.insertBefore(node, referenceNode.nextSibling);
}

/* Array prototype, matches value in array: returns bool */
Array.prototype.inArray = function (value) {
	var i;
	for (i=0; i < this.length; i++) {
		if (this[i] === value) {
			return true;
		}
	}
	return false;
};

/* get, set, and delete cookies */
function getCookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ";", len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}
	
function setCookie( name, value, expires, path, domain, secure ) {
	var today = new Date();
	today.setTime( today.getTime() );
	if ( expires ) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	document.cookie = name+"="+escape( value ) +
		( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) + //expires.toGMTString()
		( ( path ) ? ";path=" + path : "" ) +
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}
	
function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + "=" +
			( ( path ) ? ";path=" + path : "") +
			( ( domain ) ? ";domain=" + domain : "" ) +
			";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

function upgrade_lq()
{
	var old_lq= getCookie("droogle_lq");
	var new_lq= getCookie("droogle_lq_v2");
	if(old_lq != null && new_lq == null) {
		setCookie( "droogle_lq_v2", old_lq, 365*50, "/", "www.droogle.ca" );	
		deleteCookie( "droogle_lq" );
		deleteCookie( "droogle_lq" );
		deleteCookie( "droogle_lq" );
		deleteCookie( "droogle_lq" );
		deleteCookie( "droogle_lq" );
	}
}

function removeLQDrinks(drinkToRemove)
{
	var myLQ;
	var aDrinkList;
	var sOutput = "";
	var y;
	var ing_counter=0;

	myLQ = getCookie("droogle_lq_drinks_v2");
	if(myLQ != null && myLQ != "") {
		aDrinkList = myLQ.split(",");
		sOutput = "";
		y=0;

		for(y=0; y<aDrinkList.length; y++) {
			if(aDrinkList[y] != drinkToRemove) {
			    if(sOutput != "") {
    				sOutput = sOutput + "," + aDrinkList[y];
    			} else {
    				sOutput = aDrinkList[y];
    			}
			}
		}

        setCookie( "droogle_lq_drinks_v2", sOutput, 365*50, "/", "www.droogle.ca" );	
	}
}

function addLQDrinks(drinkToAdd)
{
	var myLQ;
	var aDrinkList;
	var sOutput = "";
	var y;
	var ing_counter=0;
	var addDrink = true;

	myLQ = getCookie("droogle_lq_drinks_v2");
	if(myLQ != null && myLQ != "") {
		aDrinkList = myLQ.split(",");
		sOutput = "";
		y=0;

		for(y=0; y<aDrinkList.length; y++) {
			if(aDrinkList[y] == drinkToAdd) {
				addDrink = false;
			}
		}

		if(addDrink == true) {
			sOutput = myLQ + "," + drinkToAdd;
		} else {
			sOutput = myLQ;
        }
    } else {
		sOutput = drinkToAdd;
	}

    setCookie( "droogle_lq_drinks_v2", sOutput, 365*50, "/", "www.droogle.ca" );	

   	alert("Drink saved to 'My Cabinet'");
}

function addLQIngredients(ingsToAdd)
{
	var myLQ;
	var aIngList;
	var aIngListToAdd;
	var sOutput;
	var y;
	var ing_counter=0;

	upgrade_lq();

	myLQ = getCookie("droogle_lq_v2");
	if(myLQ == null || myLQ == "") {
		setCookie( "droogle_lq_v2", ingsToAdd, 365*50, "/", "www.droogle.ca" );	
		alert("All ingredient(s) saved to 'My Cabinet'");
	} else {
		aIngList = myLQ.split(",");
		aIngListToAdd = ingsToAdd.split(",");
		sOutput = "";
		y=0;

		for(y=0; y<aIngList.length; y++) {
			if(sOutput == "") {
				sOutput = aIngList[y];
			} else {
				sOutput = sOutput + "," + aIngList[y];
			}
		}

		if(aIngListToAdd.length > 0) {
			var x=0;
			for(x=0; x<aIngListToAdd.length; x++) {
				var addIng = true;
				for(y=0; y<aIngList.length; y++) {
					if(aIngList[y] == aIngListToAdd[x]) {
						addIng = false;
					}
				}

				if(addIng == true) {
					if(sOutput == "") {
						sOutput = aIngListToAdd[x];
					} else {
						sOutput = sOutput + "," + aIngListToAdd[x];
					}
					 
					ing_counter++;
				}
			}
		}
		setCookie( "droogle_lq_v2", sOutput, 365*50, "/", "www.droogle.ca" );	
		alert(ing_counter + " ingredient(s) saved to 'My Cabinet'");
	}
}

/* quick getElement reference */
function $() {
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}