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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2010 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Form\Field;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Form\FormField;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;

/**
 * Form Field class for the Joomla Platform.
 * Provides a grouped list select field.
 *
 * @since  1.7.0
 */
class GroupedlistField extends FormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	protected $type = 'Groupedlist';

/**
	 * Name of the layout being used to render the field
	 *
	 * @var    string
	 * @since  4.0.0
	 */
	protected $layout = 'joomla.form.field.groupedlist';

/**
	 * Method to get the field option groups.
	 *
	 * @return  array  The field option objects as a nested array in groups.
	 *
	 * @since   1.7.0
	 * @throws  \UnexpectedValueException
	 */
	protected function getGroups()
	{
		$groups = array();
		$label = 0;

foreach ($this->element->children() as $element)
		{
			switch ($element->getName())
			{
				// The element is an <option />
				case 'option':
					// Initialize the group if necessary.
					if (!isset($groups[$label]))
					{
						$groups[$label] = array();
					}

$disabled = (string) $element['disabled'];
					$disabled = ($disabled === 'true' || $disabled === 'disabled' || $disabled === '1');

// Create a new option object based on the <option /> element.
					$tmp = HTMLHelper::_(
						'select.option', ($element['value']) ? (string) $element['value'] : trim((string) $element),
						Text::alt(trim((string) $element), preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname)), 'value', 'text',
						$disabled
					);

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

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

// Add the option.
					$groups[$label][] = $tmp;
					break;

// The element is a <group />
				case 'group':
					// Get the group label.
					if ($groupLabel = (string) $element['label'])
					{
						$label = Text::_($groupLabel);
					}

// Initialize the group if necessary.
					if (!isset($groups[$label]))
					{
						$groups[$label] = array();
					}

// Iterate through the children and build an array of options.
					foreach ($element->children() as $option)
					{
						// Only add <option /> elements.
						if ($option->getName() !== 'option')
						{
							continue;
						}

$disabled = (string) $option['disabled'];
						$disabled = ($disabled === 'true' || $disabled === 'disabled' || $disabled === '1');

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

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

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

// Add the option.
						$groups[$label][] = $tmp;
					}

if ($groupLabel)
					{
						$label = \count($groups);
					}
					break;

// Unknown element type.
				default:
					throw new \UnexpectedValueException(sprintf('Unsupported element %s in GroupedlistField', $element->getName()), 500);
			}
		}

reset($groups);

return $groups;
	}

/**
	 * Method to get the field input markup fora grouped list.
	 * Multiselect is enabled by using the multiple attribute.
	 *
	 * @return  string  The field input markup.
	 *
	 * @since   1.7.0
	 */
	protected function getInput()
	{
		$data = $this->getLayoutData();

// Get the field groups.
		$data['groups'] = (array) $this->getGroups();

return $this->getRenderer($this->layout)->render($data);
	}
}