/**
* @version      $Id: validate.js 7401 2007-05-14 04:12:55Z eddieajau $
* @package      Joomla
* @copyright    Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

/**
 * Unobtrusive Form Validation library
 *
 * Inspired by: Chris Campbell <www.particletree.com>
 *
 * @package     Joomla.Framework
 * @subpackage  Forms
 * @since       1.5
 */
var JFormValidator = new Class({
    initialize: function()
    {
        // Initialize variables
        this.handlers   = Object();
        this.custom     = Object();

        // Default handlers
        this.setHandler('username',
            function (value) {
                regex = new RegExp("[\<|\>|\"|\'|\%|\;|\(|\)|\&]", "i");
                return !regex.test(value);
            }
        );

        this.setHandler('password',
            function (value) {
                regex=/^\S[\S ]{2,98}\S$/;
                return regex.test(value);
            }
        );

        this.setHandler('numeric',
            function (value) {
                regex=/^(\d|-)?(\d|,)*\.?\d*$/;
                return regex.test(value);
            }
        );

        this.setHandler('email',
            function (value) {
                regex=/^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
                return regex.test(value);
            }
        );

        // Attach to forms with class 'form-validate'
        var forms = $$('form.form-validate');
        forms.each(function(form){ this.attachToForm(form); }, this);
    },

    setHandler: function(name, fn, en)
    {
        en = (en == '') ? true : en;
        this.handlers[name] = { enabled: en, exec: fn };
    },

    attachToForm: function(form)
    {
        // Iterate through the form object and attach the validate method to all input fields.
        $A(form.elements).each(function(el){
            el = $(el);
            if ((el.getTag() == 'input' || el.getTag() == 'button') && el.getProperty('type') == 'submit') {
                if (el.hasClass('validate')) {
                    el.onclick = function(){return document.formvalidator.isValid(this.form);};
                }
            }       
            else if (el.getTag() == 'input' || el.getTag() == 'textarea' || el.getTag() == 'select') {
                el.addEvent('blur', function(){return document.formvalidator.validate(this);});
            }
            else if (el.getTag()=='fieldset' && (el.hasClass('radio') || el.hasClass('checkboxes'))) {
                for(var i=0;;i++) {
                    if ($(el.getProperty('id')+i)) {
                        var fsetCh = $(el.getProperty('id')+i);
                        fsetCh.par = el;
                        fsetCh.addEvent('blur', function(){return document.formvalidator.validate(this.par);});
                    } else break;
                }
            }
            
        });
    },
    
    validate: function(el)
    {
        el = $(el);

        // Ignore the element if its currently disabled, because are not submitted for the http-request. For those case return always true.
        if(el.disabled) {
            this.handleResponse(true, el);
            return true;
        }

        // If the field is required make sure it has a value
        if (el.hasClass('required')) {
            if (el.getTag() == 'fieldset' && (el.hasClass('radio') || el.hasClass('checkboxes'))) {
                for(var i=0;;i++) {
                    if ($(el.getProperty('id')+i)) {
                        if ($(el.getProperty('id')+i).checked) {
                            break;
                        }
                    }
                    else {
                        this.handleResponse(false, el);
                        return false;
                    }
                }
            }
            else if (el.getTag() == 'select' && el.getProperty('multiple')) {
                if (el.getValue().length == 0) {
                    this.handleResponse(false, el);
                    return false;
                }
                else {
                    this.handleResponse(true, el);
                    return true;
                }
            }
            else if (!(el.getValue())) {
                this.handleResponse(false, el);
                return false;
            }
        }

        // Only validate the field if the validate class is set
        var handler = (el.className && el.className.search(/validate-([a-zA-Z0-9\_\-]+)/) != -1) ? el.className.match(/validate-([a-zA-Z0-9\_\-]+)/)[1] : "";
        if (handler == '') {
            this.handleResponse(true, el);
            return true;
        }

        // Check the additional validation types
        if ((handler) && (handler != 'none') && (this.handlers[handler]) && $(el).getValue()) {
            // Execute the validation handler and return result
            if (this.handlers[handler].exec($(el).getValue()) != true) {
                this.handleResponse(false, el);
                return false;
            }
        }

        // Return validation state
        this.handleResponse(true, el);
        return true;
    },

    isValid: function(form)
    {
        var valid = true;

        // Validate form fields
        for (var i=0;i < form.elements.length; i++) {
            if (this.validate(form.elements[i]) == false) {
                valid = false;
            }
        }

        // Run custom form validators if present
        $A(this.custom).each(function(validator){
            if (validator.exec() != true) {
                valid = false;
            }
        });

        return valid;
    },

    handleResponse: function(state, el)
    {
        // Find the label object for the given field if it exists
        if (!(el.labelref)) {
            var labels = $$('label');
            labels.each(function(label){
                if (label.getProperty('for') == el.getProperty('id')) {
                    el.labelref = label;
                }
            });
        }

        // Set the element and its label (if exists) invalid state
        if (state == false) {
            el.addClass('invalid');
            if (el.labelref) {
                $(el.labelref).addClass('invalid');
            }
        } else {
            el.removeClass('invalid');
            if (el.labelref) {
                $(el.labelref).removeClass('invalid');
            }
        }
    }
});

document.formvalidator = null;
Window.onDomReady(function(){
    document.formvalidator = new JFormValidator();
});