var Url function url merge_with_current url url this parse url merge_w

var Url = function (url, merge_with_current) {
	url = url || "";
	this.parse(url, merge_with_current);
};
$.extend(Url, {
	default_ports: {
		http: 80, 
		https: 443
	}, 
	regexp: /^(([a-z0-9_.-]+\:)?(\/\/([^\/#\?@:]+))?(:\d+)?)?([^\?#]+)?(\?[^#]*)?(#.*)?$/i, 
	parseQuery: function (query) {
		var params = {},
		pairs = query.split(/&|&|;/);
		for (var i = 0; i < pairs.length; ++i) {
			var k, v = null;
			var idx = pairs[i].indexOf('=');
			if (idx != -1) {
				k = decodeURIComponent(pairs[i].substr(0, idx));
				v = decodeURIComponent(pairs[i].substr(idx + 1));
			} else {
				k = decodeURIComponent(pairs[i]);
				v = null;
			}
			
			if (k.length) {
				if (params[k] !== undefined) {
					if (!(params[k] instanceof Array))
						params[k] = [params[k], v]
					else
						params.push(v);
				} else
					params[k] = v;
			}
		}
		return params;
	}, 
});
$.extend(Url.prototype, {
	parse: function (url, merge_with_current) {
		var m = url.match(Url.regexp) || [];
		
		this.scheme = m[2] || '';
		this.domain = m[4] || '';
		this.port   = m[5] || '';
		this.path   = m[6] || '';
		this.query  = m[7] || '';
		this.hash   = m[8] || '';
		
		if (merge_with_current) {
			// Мержим относительный URL с текущим
			this._mergeWithCurrent();
		}
		
		this.domain = this.domain.toLowerCase();
		this.scheme = this.scheme.substr(0, this.scheme.length - 1).toLowerCase();
		this.port   = this.port.substr(1);
		this.query  = this.query.substr(1);
		this.hash   = this.hash.substr(1);
		this.query  = Url.parseQuery(this.query);
		
		return this;
	}, 
	isSame: function (url) {
		return this.url(true) === url.url(true);
	}, 
	_mergeWithCurrent: function () {
		var c = window.location;
		if (!this.scheme.length) {
			this.scheme = c.protocol;
			if (!this.domain.length) {
				this.domain = c.hostname;
				if (!this.path.length) {
					this.path = window.location.pathname;
					if (!this.query.length) {
						this.query = c.search;
						if (!this.hash.length)
							this.hash = c.hash;
					}
				} else if (this.path.substr(0, 1) != '/') {
					this.path = c.pathname + 
						(c.pathname.substr(c.pathname.length - 1) == "/" ? "" : "/") + 
						this.path;
				}
			}
		}
	}, 
	url: function (skip_hash) {
		var url = "";
		if (this.scheme.length)
			url += this.scheme + ":";
		if (this.domain.length || this.port.length) {
			url += "//";
			if (this.domain.length)
				url += this.domain;
			if (this.port.length)
				url += ":" + this.port;
		}
		if (this.path.length)
			url += this.path;
		if (!$.isEmptyObject(this.query)) {
			var first = true;
			for (var key in this.query) {
				if (typeof this.query[key] == 'array') {
					for (var i = 0; i < this.query[key].length; ++i)
						url += (first ? "?" : "&") + encodeURIComponent(key) + "=" + encodeURIComponent(this.query[key]);
					if (first) first = false;
				} else {
					url += (first ? "?" : "&") + encodeURIComponent(key) + "=" + encodeURIComponent(this.query[key]);
					if (first) first = false;
				}
			}
		}
		if (this.hash.length && !skip_hash)
			url += "#" + this.hash;
		return url;
	}, 
	parseDomain: function() {
		var m, out = {domain: this.domain, sub_domain: "", sub_domains: [], base_domain: ""};
		if ((m = this.domain.match(/((.*?)\.|^)([^\.]+\.[^\.]+)$/))) {
			if (m[2] !== undefined) {
				out.sub_domain = m[2].toLowerCase();
				out.sub_domains = out.sub_domain.split('.');
			}
			if (m[3] !== undefined)
				out.base_domain = m[3].toLowerCase();
		}
		return out;
	}
});