<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * Form Field class for the Joomla Platform.
 * Supports a nested check box field listing user groups.
 * Multiselect is available by default.
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldUsergroup extends JFormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	protected $type = 'Usergroup';

	/**
	 * Method to get the user group field input markup.
	 *
	 * @return  string  The field input markup.
	 *
	 * @since   11.1
	 */
	protected function getInput()
	{
		$options = array();
		$attr = '';

		// Initialize some field attributes.
		$attr .= $this->element['class'] ? ' class="' . (string) $this->element['class'] . '"' : '';
		$attr .= ((string) $this->element['disabled'] == 'true') ? ' disabled="disabled"' : '';
		$attr .= $this->element['size'] ? ' size="' . (int) $this->element['size'] . '"' : '';
		$attr .= $this->multiple ? ' multiple="multiple"' : '';

		// Initialize JavaScript field attributes.
		$attr .= $this->element['onchange'] ? ' onchange="' . (string) $this->element['onchange'] . '"' : '';

		// Iterate through the children and build an array of options.
		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;
		}

		return JHtml::_('access.usergroup', $this->name, $this->value, $attr, $options, $this->id);
	}
}