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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2009 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\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Form\FormField;
use Joomla\CMS\Form\FormHelper;
use Joomla\CMS\Helper\ModuleHelper;
use Joomla\CMS\Language\Associations;
use Joomla\CMS\Language\Multilanguage;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\CMS\Uri\Uri;

/**
 * Form Field class for the Joomla Platform.
 * Supports a generic list of options.
 *
 * @since  1.7.0
 */
class ListField extends FormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	protected $type = 'List';

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

/**
	 * Method to get the field input markup for a generic list.
	 * Use the multiple attribute to enable multiselect.
	 *
	 * @return  string  The field input markup.
	 *
	 * @since   3.7.0
	 */
	protected function getInput()
	{
		$data = $this->getLayoutData();

$data['options'] = (array) $this->getOptions();

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

/**
	 * Method to get the field options.
	 *
	 * @return  array  The field option objects.
	 *
	 * @since   3.7.0
	 */
	protected function getOptions()
	{
		$fieldname = preg_replace('/[^a-zA-Z0-9_\-]/', '_', $this->fieldname);
		$options   = array();

foreach ($this->element->xpath('option') as $option)
		{
			// Filter requirements
			if ($requires = explode(',', (string) $option['requires']))
			{
				// Requires multilanguage
				if (\in_array('multilanguage', $requires) && !Multilanguage::isEnabled())
				{
					continue;
				}

// Requires associations
				if (\in_array('associations', $requires) && !Associations::isEnabled())
				{
					continue;
				}

// Requires adminlanguage
				if (\in_array('adminlanguage', $requires) && !ModuleHelper::isAdminMultilang())
				{
					continue;
				}

// Requires vote plugin
				if (\in_array('vote', $requires) && !PluginHelper::isEnabled('content', 'vote'))
				{
					continue;
				}

// Requires record hits
				if (\in_array('hits', $requires) && !ComponentHelper::getParams('com_content')->get('record_hits', 1))
				{
					continue;
				}
			}

$value = (string) $option['value'];
			$text  = trim((string) $option) != '' ? trim((string) $option) : $value;

$disabled = (string) $option['disabled'];
			$disabled = ($disabled === 'true' || $disabled === 'disabled' || $disabled === '1');
			$disabled = $disabled || ($this->readonly && $value != $this->value);

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

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

$tmp = array(
					'value'    => $value,
					'text'     => Text::alt($text, $fieldname),
					'disable'  => $disabled,
					'class'    => (string) $option['class'],
					'selected' => ($checked || $selected),
					'checked'  => ($checked || $selected),
			);

// Set some event handler attributes. But really, should be using unobtrusive js.
			$tmp['onclick']  = (string) $option['onclick'];
			$tmp['onchange'] = (string) $option['onchange'];

if ((string) $option['showon'])
			{
				$encodedConditions = json_encode(
					FormHelper::parseShowOnConditions((string) $option['showon'], $this->formControl, $this->group)
				);

$tmp['optionattr'] = " data-showon='" . $encodedConditions . "'";
			}

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

if ($this->element['useglobal'])
		{
			$tmp        = new \stdClass;
			$tmp->value = '';
			$tmp->text  = Text::_('JGLOBAL_USE_GLOBAL');
			$component  = Factory::getApplication()->input->getCmd('option');

// Get correct component for menu items
			if ($component === 'com_menus')
			{
				$link      = $this->form->getData()->get('link');
				$uri       = new Uri($link);
				$component = $uri->getVar('option', 'com_menus');
			}

$params = ComponentHelper::getParams($component);
			$value  = $params->get($this->fieldname);

// Try with global configuration
			if (\is_null($value))
			{
				$value = Factory::getApplication()->get($this->fieldname);
			}

// Try with menu configuration
			if (\is_null($value) && Factory::getApplication()->input->getCmd('option') === 'com_menus')
			{
				$value = ComponentHelper::getParams('com_menus')->get($this->fieldname);
			}

if (!\is_null($value))
			{
				$value = (string) $value;

foreach ($options as $option)
				{
					if ($option->value === $value)
					{
						$value = $option->text;

break;
					}
				}

$tmp->text = Text::sprintf('JGLOBAL_USE_GLOBAL_VALUE', $value);
			}

array_unshift($options, $tmp);
		}

reset($options);

return $options;
	}

/**
	 * Method to add an option to the list field.
	 *
	 * @param   string  $text        Text/Language variable of the option.
	 * @param   array   $attributes  Array of attributes ('name' => 'value' format)
	 *
	 * @return  ListField  For chaining.
	 *
	 * @since   3.7.0
	 */
	public function addOption($text, $attributes = array())
	{
		if ($text && $this->element instanceof \SimpleXMLElement)
		{
			$child = $this->element->addChild('option', $text);

foreach ($attributes as $name => $value)
			{
				$child->addAttribute($name, $value);
			}
		}

return $this;
	}

/**
	 * Method to get certain otherwise inaccessible properties from the form field object.
	 *
	 * @param   string  $name  The property name for which to get the value.
	 *
	 * @return  mixed  The property value or null.
	 *
	 * @since   3.7.0
	 */
	public function __get($name)
	{
		if ($name === 'options')
		{
			return $this->getOptions();
		}

return parent::__get($name);
	}
}