<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

//defined('JPATH_PLATFORM') or die;

jimport('joomla.form.formrule');


/**
 * Form Rule class for the Joomla Framework.
 *
 * @package     Joomla.Framework
 * @subpackage  Form
 * @since       11.1
 */
class JFormRuleTel extends JFormRule
{
    /**
     * Method to test the url for a valid parts.
     *
     * @param   object  $element    The JXMLElement object representing the <field /> tag for the
     *                              form field object.
     * @param   mixed   $value      The form field value to validate.
     * @param   string  $group      The field name group control value. This acts as as an array
     *                              container for the field. For example if the field has name="foo"
     *                              and the group value is set to "bar" then the full field name
     *                              would end up being "bar[foo]".
     * @param   object  $input      An optional JRegistry object with the entire data set to validate
     *                              against the entire form.
     * @param   object  $form       The form object for which the field is being tested.
     *
     * @return  boolean True if the value is valid, false otherwise.
     * @since   11.1
     * @throws  JException on invalid rule.
     */
    public function test(& $element, $value, $group = null, & $input = null, & $form = null)
    {
        // If the field is empty and not required, the field is valid.
        $required = ((string) $element['required'] == 'true' || (string) $element['required'] == 'required');
        if (!$required && empty($value)) {
            return true;
        }       
        // @see http://www.nanpa.com/
        // @see http://tools.ietf.org/html/rfc4933
        // @see http://www.itu.int/rec/T-REC-E.164/en
         
        // Regex by Steve Levithan
        // @see http://blog.stevenlevithan.com/archives/validate-phone-number
        // @note that valid ITU-T and EPP must begin with +.
        $regexarray = array(
            'NANP' => '/^(?:\+?1[-. ]?)?\(?([2-9][0-8][0-9])\)?[-. ]?([2-9][0-9]{2})[-. ]?([0-9]{4})$/',
            'ITU-T'=> '/^\+(?:[0-9] ?){6,14}[0-9]$/',
            'EPP' => '/^\+[0-9]{1,3}\.[0-9]{4,14}(?:x.+)?$/'
        );
        if (isset($element['plan'])){
        
            $plan = (string) $element['plan'];
            if ($plan =='northamerica' || $plan == 'us' ) {
                $plan = 'NANP';
            } else
             if ( $plan == 'International' || $plan == 'int' || $plan == 'missdn' || !$plan) {
                $plan = 'ITU-T';
             } else 
             if ( $plan == 'IETF') {
                $plan='EPP';
             }
    
            $regex = $regexarray[$plan];
            // Test the value against the regular expression.           
            if (preg_match($regex, $value) == false) {
                
                return false;
            }
        } else {
            //If the rule is set but no plan is selected just check that there are between 
            //7 and 15 digits inclusive and no illegal characters (but common number separators
            //are allowed). 
            $cleanvalue = preg_replace('/[+. -(\)]/','',$value);
            $regex = '/^[0-9]{7,15}?$/';
            if (preg_match($regex, $cleanvalue) == true) {
                
                return true;
            } else {
                
                return false;
            }
        }   
                
        return true;    
    }
}