<?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.html.html');
jimport('joomla.form.formfield');

/**
 * Form Field class for the Joomla Framework.
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldRadio extends JFormField
{
    /**
     * The form field type.
     *
     * @var     string
     * @since   11.1
     */
    protected $type = 'Radio';

    /**
     * Method to get the field input markup.
     *
     * @return  string  The field input markup.
     * @since   11.1
     */
    protected function getInput()
    {
        // Initialize variables.
        $html = array();

        // Initialize some field attributes.
        $class = $this->element['class'] ? ' class="radio '.(string) $this->element['class'].'"' : ' class="radio"';

        // Start the radio field output.
        $html[] = '<fieldset id="'.$this->id.'"'.$class.'>';

        // Get the field options.
        $options = $this->getOptions();

        // Build the radio field output.
        foreach ($options as $i => $option) {

            // Initialize some option attributes.
            $checked    = ((string) $option->value == (string) $this->value) ? ' checked="checked"' : '';
            $class      = !empty($option->class) ? ' class="'.$option->class.'"' : '';
            $disabled   = !empty($option->disable) ? ' disabled="disabled"' : '';

            // Initialize some JavaScript option attributes.
            $onclick    = !empty($option->onclick) ? ' onclick="'.$option->onclick.'"' : '';

            $html[] = '<input type="radio" id="'.$this->id.$i.'" name="'.$this->name.'"' .
                    ' value="'.htmlspecialchars($option->value, ENT_COMPAT, 'UTF-8').'"'
                    .$checked.$class.$onclick.$disabled.'/>';

            $html[] = '<label for="'.$this->id.$i.'"'.$class.'>'.JText::alt($option->text, preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname)).'</label>';
        }

        // End the radio field output.
        $html[] = '</fieldset>';

        return implode($html);
    }

    /**
     * Method to get the field options.
     *
     * @return  array   The field option objects.
     * @since   11.1
     */
    protected function getOptions()
    {
        // Initialize variables.
        $options = array();

        foreach ($this->element->children() as $option) {

            // Only add <option /> elements.
            if ($option->getName() != 'option') {
                continue;
            }

            // Create a new option object based on the <option /> element.
            $tmp = JHtml::_('select.option', (string) $option['value'], trim((string) $option), 'value', 'text', ((string) $option['disabled']=='true'));

            // Set some option attributes.
            $tmp->class = (string) $option['class'];

            // Set some JavaScript option attributes.
            $tmp->onclick = (string) $option['onclick'];

            // Add the option object to the result set.
            $options[] = $tmp;
        }

        reset($options);

        return $options;
    }
}