MAP.js

window.MAP = function(func){

  var data = {}, definition = {}, defaults = {};

  MAP.each(MAP._grab_, function(def){
    var value = def.getter();
		if(value) data[def.key] = value;
	});

	definition = MAP.find(MAP._map_, function(def){
		return MAP.find(def.matches, function(r){
			r = MAP.toArray(r);

			var match = window.location.href.match(r[0]);

			if(match){
				if(r[1]) r[1].apply(def.data, match);

				return true;
			}
		});
	}) || {data:{}};

  data = MAP.extend({}, data, definition.data);

	defaults = MAP._fallback_( MAP.extend({},data) );

	func(MAP.extend({}, data, defaults));
}
MAP._grab_ = [];
MAP._map_ = [];
MAP._fallback_ = function(){return {}};
MAP.each = function(list, func){
	var l = list.length, i;
	for(i = 0; i < l; i++){
		func(list[i], i, list);
	}
};
MAP.find = function(list, func){
	var l = list.length, i;
	for(i = 0; i < l; i++){
		if(func(list[i], i, list)) return list[i];
	}
};
MAP.toArray = function(obj){
	if(!(obj instanceof Array)) obj = [obj];
	return obj;
};
MAP.extend = function(trgt){
	var args = [].slice.call(arguments), i = args.length, src, k;
	while(i--){
		var src = args[i];
		for(k in src){
			trgt[k] = src[k];
		}
	}
	return trgt;
};
MAP.add = function(obj){
	MAP._map_.push(obj);
};
MAP.getter = function(name, func){
	MAP._grab_.push({
		key: name,
		getter: func
	});
};
MAP.fallback = function(func){
	MAP._fallback_ = func;
};