/**
 *
 * Various form validation methods.
 *
 * @author Moxiecode
 * @copyright Copyright © 2004-2008, Moxiecode Systems AB, All rights reserved.
 */

/**
	// String validation:

	if (!Validator.isEmail('myemail'))
		alert('Invalid email.');

	// Form validation:

	var f = document.forms['myform'];

	if (!Validator.isEmail(f.myemail))
		alert('Invalid email.');
*/

var Validator = {
	isEmail : function(s) {
		return this.test(s, '^[-!#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+@[-!#$%&\'*+\\/0-9=?A-Z^_`a-z{|}~]+\.[-!#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+$');
	},

	isAbsUrl : function(s) {
		return this.test(s, '^(news|telnet|nttp|file|http|ftp|https)://[-A-Za-z0-9\\.]+\\/?.*$');
	},

	isSize : function(s) {
		return this.test(s, '^[0-9]+(%|in|cm|mm|em|ex|pt|pc|px)?$');
	},

	isId : function(s) {
		return this.test(s, '^[A-Za-z_]([A-Za-z0-9_])*$');
	},

	isEmpty : function(s) {
		var nl, i;

		if (s.nodeName == 'SELECT' && s.selectedIndex < 1)
			return true;

		if (s.type == 'checkbox' && !s.checked)
			return true;

		if (s.type == 'radio') {
			for (i=0, nl = s.form.elements; i<nl.length; i++) {
				if (nl[i].type == "radio" && nl[i].name == s.name && nl[i].checked)
					return false;
			}

			return true;
		}

		return new RegExp('^\\s*$').test(s.nodeType == 1 ? s.value : s);
	},

	isNumber : function(s, d) {
		return !isNaN(s.nodeType == 1 ? s.value : s) && (!d || !this.test(s, '^-?[0-9]*\\.[0-9]*$'));
	},

	test : function(s, p) {
		s = s.nodeType == 1 ? s.value : s;

		return s == '' || new RegExp(p).test(s);
	}
};

var AutoValidator = {
	settings : {
		id_cls : 'id',
		int_cls : 'int',
		url_cls : 'url',
		number_cls : 'number',
		email_cls : 'email',
		size_cls : 'size',
		required_cls : 'required',
		invalid_cls : 'invalid',
		min_cls : 'min',
		max_cls : 'max'
	},

	init : function(s) {
		var n;

		for (n in s)
			this.settings[n] = s[n];
	},

	validate : function(f) {
		var i, nl, s = this.settings, c = 0;

		nl = this.tags(f, 'label');
		for (i=0; i<nl.length; i++)
			this.removeClass(nl[i], s.invalid_cls);

		c += this.validateElms(f, 'input');
		c += this.validateElms(f, 'select');
		c += this.validateElms(f, 'textarea');

		return c == 3;
	},

	invalidate : function(n) {
		this.mark(n.form, n);
	},

	reset : function(e) {
		var t = ['label', 'input', 'select', 'textarea'];
		var i, j, nl, s = this.settings;

		if (e == null)
			return;

		for (i=0; i<t.length; i++) {
			nl = this.tags(e.form ? e.form : e, t[i]);
			for (j=0; j<nl.length; j++)
				this.removeClass(nl[j], s.invalid_cls);
		}
	},

	validateElms : function(f, e) {
		var nl, i, n, s = this.settings, st = true, va = Validator, v;

		nl = this.tags(f, e);
		for (i=0; i<nl.length; i++) {
			n = nl[i];

			this.removeClass(n, s.invalid_cls);

			if (this.hasClass(n, s.required_cls) && va.isEmpty(n))
				st = this.mark(f, n);

			if (this.hasClass(n, s.number_cls) && !va.isNumber(n))
				st = this.mark(f, n);

			if (this.hasClass(n, s.int_cls) && !va.isNumber(n, true))
				st = this.mark(f, n);

			if (this.hasClass(n, s.url_cls) && !va.isAbsUrl(n))
				st = this.mark(f, n);

			if (this.hasClass(n, s.email_cls) && !va.isEmail(n))
				st = this.mark(f, n);

			if (this.hasClass(n, s.size_cls) && !va.isSize(n))
				st = this.mark(f, n);

			if (this.hasClass(n, s.id_cls) && !va.isId(n))
				st = this.mark(f, n);

			if (this.hasClass(n, s.min_cls, true)) {
				v = this.getNum(n, s.min_cls);

				if (isNaN(v) || parseInt(n.value) < parseInt(v))
					st = this.mark(f, n);
			}

			if (this.hasClass(n, s.max_cls, true)) {
				v = this.getNum(n, s.max_cls);

				if (isNaN(v) || parseInt(n.value) > parseInt(v))
					st = this.mark(f, n);
			}
		}

		return st;
	},

	hasClass : function(n, c, d) {
		return new RegExp('\\b' + c + (d ? '[0-9]+' : '') + '\\b', 'g').test(n.className);
	},

	getNum : function(n, c) {
		c = n.className.match(new RegExp('\\b' + c + '([0-9]+)\\b', 'g'))[0];
		c = c.replace(/[^0-9]/g, '');

		return c;
	},

	addClass : function(n, c, b) {
		var o = this.removeClass(n, c);
		n.className = b ? c + (o != '' ? (' ' + o) : '') : (o != '' ? (o + ' ') : '') + c;
	},

	removeClass : function(n, c) {
		c = n.className.replace(new RegExp("(^|\\s+)" + c + "(\\s+|$)"), ' ');
		return n.className = c != ' ' ? c : '';
	},

	tags : function(f, s) {
		return f.getElementsByTagName(s);
	},

	mark : function(f, n) {
		var s = this.settings;

		this.addClass(n, s.invalid_cls);
		this.markLabels(f, n, s.invalid_cls);

		return false;
	},

	markLabels : function(f, n, ic) {
		var nl, i;

		nl = this.tags(f, "label");
		for (i=0; i<nl.length; i++) {
			if (nl[i].getAttribute("for") == n.id || nl[i].htmlFor == n.id)
				this.addClass(nl[i], ic);
		}

		return null;
	}
};
